Patent Application
20230136689
The present invention relates generally to a pump with variable suction/discharge amount and a drive device composed of the pump and a driving method thereof, and more particularly to a rotary vane pump composed of a fixed wall member, a movable wall member, a movable vane chamber sleeve and a vane rotor. The rotary vane pump has a vane chamber, which is extendable/retractable in an axial direction of the vane rotor. Accordingly, the capacity of the vane chamber is variable to form the pump with variable suction/discharge amount. In addition, at least two pumps with variable suction/discharge amount can be assembled in communication with each other to form an active/passive drive device. Moreover, in the principle that the driving force and the load resistance must be balanced, during the operation process, the drive device can automatically adjust the rotational speed ratio between the active pump and the passive pump as a transmission drive device.
The conventional pumps can be generally classified into two major types, that is, the pump with constant suction/discharge amount and the pump with variable suction/discharge amount. The pump with variable suction/discharge amount has wider application range and thus is popularly employed in relevant industries. With respect to the structural form, the pump with variable suction/discharge amount can be further classified into two types, that is, piston-type pump with variable suction/discharge amount and rotary vane pump with variable suction/discharge amount. The piston-type pump with variable suction/discharge amount generally has a rotary swash plate with variable angle. In rotation, the swash plate sequentially pushes multiple piston-type cylinder blocks arranged substantially in parallel to each other.
However, the cam ring 11 is mounted in the pump 1 so that the adjustable displacement amount is limited within the fixed space of the housing of the pump. The size of the internal space of the housing directly affects and restricts the radial sizes of the pump body and all the components. As a result, when it is necessary to manufacture different products with maximal suction/discharge amount, the commonality of the components of the different pumps with different suction/discharge amounts is quite low. Therefore, it is necessary redesign numerous components of each new pump with maximal suction/discharge amount and manufacture the molds for molding the components. As a result, the manufacturing cost is greatly increased. In addition, in operation, in case the distance between the suction side and the discharge side of the pump is relatively long, then the pressure difference between the suction side and the discharge side will be excessively great. Under such circumstance, the reciprocal radial extension/retraction displacement amount of the respective vanes may be too large. This will lead to ill affection of vibration or collision noise.
It is therefore a primary object of the present invention to provide a novel rotary vane pump with variable suction/discharge amount to solve the above problems existing in the conventional pump with variable suction/discharge amount. The vane chamber of the pump is extendable/retractable in an axial direction of the vane rotor to modulate the capacity of the vane chamber. Accordingly, the unit circulation suction/discharge amount of the fluid in the pump can be increased/decreased with the axial change of the space of the vane chamber. Therefore, when it is necessary to manufacture different pumps with different suction/discharge amounts, the radial specifications of the respective components are in conformity with each other so that the community in use of the components is enhanced and the manufacturing and material costs of different pumps with suction/discharge amounts are greatly lowered. Moreover, when the requirement for the maximal suction/discharge amount of the pump is increase, it is only necessary to modify the axial size of the pump and the relevant components without enlarging the radial size of the vane chamber to increase the pressure difference between the suction side and the discharge side in the vane chamber. Also, the radial extending/retracting travel of the vane will not be elongated due to the increase of the radial size of the vane chamber. Therefore, in operation, the noise made by the reciprocal extension/retraction of the vane can be effectively lowered.
It is a further object of the present invention to provide a transmission drive device composed of at least two pumps with variable suction/discharge amount. The two pumps are oppositely arranged. The fluid suction passage of one of the two pumps is in communication with the fluid discharge passage of the other of the two pumps to form a closed driving loop for the active pump to drive the passive pump. During the driving operation process of the loop, when a difference value exists between the driving force of the active pump and the load resistance of the passive pump, the difference value pushes and acts on the extendable/retractable vane chamber of the vane chamber body, whereby the capacity of the vane chamber of the active pump and the capacity of the vane chamber of the passive pump are automatically extended/retracted and modulated until the driving force applied to the fluid in the active pump and the load resistance pushed by the fluid in the passive pump are balanced. Also, in the condition that the fluid suction/discharge amount per unit time of the active pump and the fluid suction/discharge amount per unit time of the passive pump are nearly equal to each other, the capacities of the vane chambers and the rotational speeds of the active pump and the passive pump are automatically adjusted to be in inverse proportion to each other so as to balance the operation. Therefore, when the driving force or the load resistance changes, the rotational speed ratio of the active pump and the passive pump is automatically adjusted according to the change of the driving force and the load resistance so as to achieve the object of smooth transmission driving.
To achieve the above and other objects, the pump with variable suction/discharge amount of the present invention includes a vane chamber body and a vane rotor disposed in the vane chamber body. The vane chamber body is at least composed of a fixed wall member, a movable wall member and a movable vane chamber sleeve, which define a vane chamber. The vane rotor has an impeller disposed in the vane chamber. At least one vane is disposed on the impeller. The movable wall member and the movable vane chamber sleeve are displaceable in an axial direction of the vane rotor relative to the fixed wall member, whereby the vane chamber is extendable/retractable in the axial direction of the vane rotor to increase/decrease the capacity of the vane chamber.
In the above pump with variable suction/discharge amount, the number of the vanes is less than or equal to the number of the eccentric vane chamber sections.
In the above pump with variable suction/discharge amount, one single vane is disposed on the impeller and the vane chamber has at least one eccentric vane chamber section.
In the above pump with variable suction/discharge amount, the vane chamber has multiple eccentric vane chamber sections and multiple vanes are disposed on the impeller in adaptation to the multiple eccentric vane chamber sections.
In the above pump with variable suction/discharge amount, two rotor shaft ends of the vane rotor are respectively disposed on two support bodies corresponding to the two rotor shaft ends. At least one of the rotor shaft ends is externally connected with a driving member for receiving power or bearing load.
In the above pump with variable suction/discharge amount, the fixed wall member has a fixed wall seat sleeve and a fixed wall end face. The fixed wall end face is disposed at one end of the fixed wall seat sleeve and normal to the axis of the vane rotor, whereby the fixed wall end face can tightly attach to an end face of the impeller of the vane rotor normal to the axial direction of the vane rotor.
In the above pump with variable suction/discharge amount, the fixed wall member is fitted on a base seat of the support body (at one end).
The base seat has a fixed wall end boss. The fixed wall end boss is fully plugged in a fixed wall hole formed at a center of the fixed wall end face, whereby a boss end face of the fixed wall end boss and the fixed wall end face together form a fixed wall face and the fixed wall face can tightly attach to an end face of the vane rotor normal to the axial direction of the vane rotor. An eccentric rotor shaft hole is formed on the fixed wall end boss. A shaft end of the vane rotor is pivotally fitted in the eccentric rotor shaft hole.
In the above pump with variable suction/discharge amount, at least two fluid suction/discharge passages are formed in the vane rotor. One end of each suction/discharge passage, which end is directed to the vane chamber, is in communication with a suction side and a discharge side of the vane of the vane rotor. One end of each suction/discharge passage, which end is distal from the suction side and the discharge side, is in communication with at least one of two rotor shaft ends of the vane rotor.
In the above pump with variable suction/discharge amount, a fluid suction/discharge port member is pivotally fitted on and assembled with the rotor shaft end in communication with the suction/discharge passages, whereby the rotor shaft end can pivotally rotate in the fluid suction/discharge port member, while the fluid suction/discharge port member is disposed on a support body (at one end) and keeps stationary.
In the above pump with variable suction/discharge amount, the suction/discharge passages extend to the same rotor shaft end. The suction/discharge passages respectively communicates with a central section and a non-central section of the rotor shaft end and connecting with outer side directly via a suction/discharge passage disposed on at least one of the base seat and the support body.
In the above pump with variable suction/discharge amount, the movable wall member is fitted around and assembled with the vane rotor, whereby the movable wall member can slide on an outer circumference of the impeller in the axial direction of the vane rotor, the movable vane chamber sleeve being fitted around the fixed wall member and the impeller to synchronously axially slide with the movable wall member.
In the above pump with variable suction/discharge amount, a retainer member is assembled between the movable wall member and the movable vane chamber sleeve so as to keep the movable wall member and the movable vane chamber sleeve attach to and assemble with each other, whereby the movable wall member and the movable vane chamber sleeve can synchronously slide in the axial direction of the vane rotor.
In the above pump with variable suction/discharge amount, the movable wall member has a movable wall face. The movable wall face tightly attaches to vane chamber sleeve end face of the movable vane chamber sleeve distal from the fixed wall member. A fitting hole is formed at a center of the movable wall member, which is axially slidable to fit around the impeller. An inner wall of the fitting hole is formed with a vane receiving slot corresponding to the vane of the impeller, whereby the vane can slide into the vane receiving slot.
In the above pump with variable suction/discharge amount, the vane chamber inside the movable vane chamber sleeve is defined between the movable vane chamber sleeve, the fixed wall end face of the fixed wall member, the movable wall face of the movable wall member and the vane rotor. The impeller occupying a part of the vane chamber and the remaining space of the vane chamber forms at least one eccentric vane chamber section eccentric to the axis of the vane rotor.
In the above pump with variable suction/discharge amount, the vane has a vane top edge distal from the vane rotor. The vane top edge tightly attaches to the inner wall of the vane chamber and is slidable relative to the inner wall of the vane chamber in at least one of the axial and circumferential directions of the vane rotor.
In the above pump with variable suction/discharge amount, a sealing block is disposed at inter-contacting sections of the vane, the movable wall member and the movable vane chamber sleeve to avoid any gap between the inter-contacting sections of the vane, the movable wall member and the movable vane chamber sleeve, whereby the fluid in the vane chamber is prevented from leaking.
In the above pump with variable suction/discharge amount, an operation fluid is output and input into the vane chamber in a closed loop, at least one of the movable wall member and the movable vane chamber sleeve being displaceable relative to the fixed wall member, whereby the capacity of the vane chamber is changeable and the output amount and input amount of the operation fluid pushed by the rotating vane rotor to pass the vane chamber per unit time are variable with the change of the capacity of the vane chamber, whereby the vane rotor can provide power transmission at different rotational speeds according to the change of the capacity of the vane chamber.
In the above pump with variable suction/discharge amount, in the push transfer process of the sole operation fluid, the pressure in the vane chamber is changed, the change amount of the pressure pushing and acting between the movable wall member, the movable vane chamber sleeve, the vane rotor and the fixed wall member, whereby at least the movable wall member and the fixed wall member are displaced relative to each other.
In the above pump with variable suction/discharge amount, an external forcing member applies a push force to at least one of the movable wall member and the movable vane chamber sleeve to forcedly at least make the movable wall member and the fixed wall member displace relative to each other.
In the above pump with variable suction/discharge amount, a transmission drive device composed of the above pump with variable suction/discharge amount of the present invention is composed of at least two pumps with variable suction/discharge amount. The two pumps with variable suction/discharge amount are oppositely arranged. One of the two pumps with variable suction/discharge amount is set a active pump, while the other of the two pumps with variable suction/discharge amount is set a passive pump, a driving loop being formed between the active pump and the passive pump.
In the above transmission drive device, at least one of a same-direction displacement connection member and a synchronous displacement connection member is drivingly connected between at least one of the movable wall member and the movable vane chamber sleeve of the active pump and the movable wall member and the movable vane chamber sleeve of the passive pump.
In the above transmission drive device, a displacement resistant member is additionally arranged in at least one of the increasing direction of the capacity of the vane chamber of the active pump and the decreasing direction of the capacity of the vane chamber of the passive pump.
In the above transmission drive device, each of the active pump end and the passive pump end has at least four-time vanes and a number of eccentric vane chamber sections, which number is more than or equal to the number of the vanes. The angle phase of each vane in the vane chamber corresponding to the eccentric vane chamber section is 180-degree different from the angle phase of at least another vane in the vane chamber in a complementary relationship.
In the above transmission drive device, each the four-time eccentric vane chamber sections are integrally formed in one single pump with variable suction/discharge amount.
In the above transmission drive device, each eccentric vane chamber sections are formed in each independent pump with variable suction/discharge amount.
In the above transmission drive device, the transmission drive device has at least two active pumps and a common engagement member is engaged between the two active pumps to synchronously drive the two active pumps.
In the above transmission drive device, the transmission drive device has at least two active pumps and a common engagement member is engaged around the two active pumps to synchronously drive the two active pumps.
In the above transmission drive device, the transmission drive device has at least two active pumps and at least two passive pumps. At least one of the active pumps and the passive pumps is assembled and connected in an array.
In the above transmission drive device, the transmission drive device has at least two active pumps and at least two passive pumps. At least one of the active pumps and the passive pumps is linearly assembled and connected.
In the above transmission drive device, the transmission drive device has at least two active pumps and at least two passive pumps. At least one of the active pumps and the passive pumps is serially assembled and connected in the form of a string.
In the above transmission drive device employing the pump with variable suction/discharge amount of the present invention, an operation fluid is output and input into the vane chamber in a closed loop, at least one of the movable wall member and the movable vane chamber sleeve being displaceable relative to the fixed wall member, whereby the capacity of the vane chamber is changeable and the output amount and input amount of the operation fluid pushed by the rotating vane rotor to pass the vane chamber per unit time are variable with the change of the capacity of the vane chamber, whereby the vane rotor can provide power transmission at different rotational speeds according to the change of the capacity of the vane chamber.
In the above transmission drive device, in the push transfer process of the sole operation fluid, the pressure in the vane chamber is changed, the change amount of the pressure pushing and acting between the movable wall member, the movable vane chamber sleeve, the vane rotor and the fixed wall member, whereby at least the movable wall member and the fixed wall member are displaced relative to each other.
In the above driving method, an external forcing member applies a push force to at least one of the movable wall member and the movable vane chamber sleeve to forcedly at least make the movable wall member and the fixed wall member displace relative to each other.
The driving method employing the pump with variable suction/discharge amount of the present invention includes steps of:
In the above driving method, in operation of the driving loop, the driving force of the active pump rotates the vane rotor to drive the vane to apply a push pressure to the movable vane chamber sleeve, the fixed wall face of the fixed wall member and the movable wall face of the movable wall member positioned on the discharge side of the vane in the eccentric vane chamber section of the active pump and the vane face of the vane, the movable vane chamber sleeve, the fixed wall face and the movable wall face positioned on the suction side of the vane in the eccentric vane chamber section of the passive pump. On the other hand, at the same time, after pushed, a vacuum sucking force is applied to the movable vane chamber sleeve, the fixed wall face and the movable wall face positioned on the suction side of the vane in the eccentric vane chamber section of the active pump and the vane face of the vane, the movable vane chamber sleeve, the fixed wall face and the movable wall face positioned on the discharge side of the vane in the eccentric vane chamber section of the passive pump. After the movable wall face bears the push pressure or the vacuum sucking force, the movable wall member and the movable vane chamber sleeve tightly attaching thereto are synchronously axially moved. Two sides of the vane in the passive pump are respectively double-affected by the push pressure and the vacuum sucking force in the same direction and passive, whereby the vane rotor is passive to rotate and output power to the load end of the passive pump.
In the above driving method, in case the area of the movable wall face of the movable wall member on the discharge side of the vane in the eccentric vane chamber section of the active pump is larger than the area of the movable wall face of the movable wall member on the suction side of the vane in the eccentric vane chamber section of the passive pump, the movable wall member and the movable vane chamber sleeve of the active pump gradually axially displace in a direction away from the fixed wall face of the fixed wall face to enlarge the axial space of the eccentric vane chamber section. At the same time, a sucking force is applied to the suction side of the vane of the passive pump, whereby the movable wall member and the movable vane chamber sleeve of the passive pump are sucked to axially displace in a direction toward the fixed wall face. Also, in case the area of the movable wall face on the suction side of the vane in the eccentric vane chamber section of the active pump is smaller than the area of the movable wall face on the discharge side of the vane in the eccentric vane chamber section of the passive pump, the vane of the active pump sweeps to produce vacuum sucking force on the suction side. A greater vacuum sucking force is applied to the movable wall face in the passive pump with larger area, whereby the movable wall member and the movable vane chamber sleeve of the active pump displace in a direction away from the fixed wall face and the movable wall member and the movable vane chamber sleeve of the passive pump displace in a direction toward the fixed wall face. Reversely, when the sizes of the areas of the movable wall faces on the discharge side and the suction side of the vanes respectively in the eccentric vane chamber sections of the active pump and the passive pump are compared with each other to be on the contrary to the above, the movable wall member and the movable vane chamber sleeve of the active pump and the passive pump displace in a direction reverse to the above direction. The same-direction displacement connection member is connected between the active pump and the passive pump so that along with the driving of the vane of the active pump. The liquid phase fluid applues a push force to the vane face on the suction side of the vane in the passive pump to gradually push the passive pump and the load end thereof so that the driving loop of the active pump and the passive pump will gradually start to operate.
In the above driving method, the active pump assembly with multiple eccentric vane chamber sections is connected with the passive pump assembly with multiple eccentric vane chamber sections. The sums of the areas of the movable wall faces respectively on two sides of the vanes in the eccentric vane chamber sections of the active pump and the passive pumps are equal to each other, whereby the driving force of the active pump assembly is balanced with the load resistance of the passive pump assembly and the sums of the areas of the movable wall faces on the discharge sides and the suction sides of the active pump assembly and the passive pump assembly are equal to each other. Also, the angle phases of the vanes respectively positioned in the eccentric vane chamber sections is arranged in a corresponding complementary relationship, whereby during any operation process, the active pump assembly and the passive pump assembly always has a vane face for bearing the power to provide driving effect.
In the above driving method, in operation of the closed driving loop of at least one of the active pump assembly and the passive pump assembly, when the driving force and the load resistance are varied, the total capacity and rotational speed of the active pump and the total capacity and rotational speed of the passive pump are automatically adjusted to make the driving force and the load resistance automatically achieve a balanced state. The rotational speed ratio of the active pump and the passive pump is automatically modulated according to the change of the driving force and the load resistance.
The present invention can be best understood through the following description and accompanying drawings, wherein:
Please refer to
According to the above principle, in a first embodiment of the present invention (as shown in
The vane rotor 3 has at least one impeller 30 and at least one vane 31 assembled with the impeller 30. The vane 31 is radially slidable and extendable/retractable. The impeller 30 has an end face 301 normal to the axis vane rotor 3. The end face 301 can tightly attach to the fixed wall face 204. The vane rotor 3 has a first rotor shaft 33, which can be pivotally fitted in an eccentric rotor shaft hole 412 formed on the base seat 41. The first rotor shaft 33 is further passed through the first support body 4 to externally connect with a transmission member 36 for receiving power or bearing a load. The vane rotor 3 further has a second rotor shaft 34, in which a first suction/discharge port 341 and a second suction/discharge port 342 are formed. A first suction/discharge passage 343 and a second suction/discharge passage 344 are formed in the vane rotor 3 respectively in communication with the first and second suction/discharge ports 341, 342. The first and second suction/discharge passages 343, 344 respectively extend to further communicate with a suction side and a discharge side on two sides of the vane 31 into communication with the vane chamber 230. The second rotor shaft 34 can be directly pivotally disposed on the second support body 40. Alternatively, as shown in
The movable wall member 22 is fitted around the vane rotor 3 and is axially slidable to fit around the impeller 30. The movable wall member 22 has a movable wall face 221. The movable wall face 221 is tightly attached to a vane chamber sleeve end face 2302 of the movable vane chamber sleeve 23, which faces the movable wall member 22. A fitting hole 222 is formed at a center of the movable wall member 22, which is axially slidable to fit around the impeller 30. An inner wall of the fitting hole 222 is formed with a vane receiving slot 2221 corresponding to the vane 31. The vane 31 can slide into the vane receiving slot 2221, whereby when the movable wall member 22 relatively axially approaches the fixed wall member 21, more part of the vane 31 can slide into the vane receiving slot 2221. The vane chamber 230 is defined in the movable vane chamber sleeve 23. The vane chamber 230 can axially slide to fit around the fixed wall member 21 and the impeller 30. The vane chamber 230 is defined between the movable vane chamber sleeve 23, the fixed wall end face 212, the movable wall face 221 and the vane rotor 3. The impeller 30 occupies a part of the vane chamber 230. The remaining space of the vane chamber 230 forms at least one eccentric vane chamber section 2301 eccentric to the axis of the vane rotor 3. The vane 31 has a vane top edge 311 distal from the vane rotor 3. The vane top edge 311 tightly attaches to the inner wall of the vane chamber 230 and is axially and/or circumferentially slidable relative to the inner wall of the vane chamber 230. In addition, proper sealing and leakproof members can be disposed between the contacting sections of the vane 31 and the inner wall of the vane chamber 230 and between the tightly attaching or relatively displacing sections of the fixed wall member 21, the movable wall member 22, the movable vane chamber sleeve 23 and the vane rotor 3 so as to prevent the fluid in the operating vane chamber 230 from leaking through the aforesaid sections. Especially, at the inter-contacting sections of the vane top edge 311 of the vane 31, the movable wall member 22 and the movable vane chamber sleeve 23, the curve of the configuration of the vane top edge 311, the cross-sectional curve of the vane receiving slot 2221 of the movable wall member 22, into which the vane top edge 311 can slide and the curve of the inner wall of the vane chamber 230 of the movable vane chamber sleeve 23 in contact with the vane top edge 311 are different from each other. Therefore, minor gaps exist between the inter-contacting sections of the vane top edge 311 of the vane 31, the movable wall member 22 and the movable vane chamber sleeve 23. As a result, in operation, the vane chamber 230 cannot be fully closed. In order to solve this problem, a sealing block 37 is disposed on the vane top edge 311, which can tightly attach to the vane top edge 311 to synchronously slide with the vane 31. The sealing block 37 is further restricted in the intersection path of the vane receiving slot 2221 of the movable wall member 22 and the outer edge of the inner wall of the vane chamber 230 of the movable vane chamber sleeve 23. Accordingly, in operation, the sealing block 37 always seals the inter-contacting sections of the vane top edge 311, the vane receiving slot 2221 and the outer edge of the inner wall of the vane chamber 230 and blocks the gaps to achieve good sealing and leakproof effect. A retainer member 5 can be assembled between the movable wall member 22 and the movable vane chamber sleeve 23 so as to keep the movable wall member 22 and the movable vane chamber sleeve 23 attach to and assemble with each other, whereby the movable wall member 22 and the movable vane chamber sleeve 23 can synchronously axially slide. (The retainer member 5 can have various structural forms and will not be redundantly described hereinafter).
According to the above assembled structure, in operation, when the vane rotor 3 drives the vane 31 to sweep within the eccentric vane chamber section 2301, the fluid on the forward side of the sweeping direction of the vane 31 is compressed and discharged as a discharge side. The fluid positioned on the other side of the vane 31 is sucked in as a suction side. In addition, the eccentric vane chamber section 2301 is eccentric to the axis of the vane rotor 3 so that the area of the fixed wall face 204 per unit angle, which the vane 31 sweeps over in the eccentric vane chamber section 2301, will continuously change along with the rotation of the vane rotor 3. This phenomenon is equivalent to that the intersection area of the movable wall face 221 on two sides of the vane 31 and the interior of the eccentric vane chamber section 2301 and the suction/discharge amount of the fluid on two sides of the vane 31 will both change along with the change of the sweeping position of the vane 31. Also, the space of the eccentric vane chamber section 2301, which is occupied by the vane 31, is relatively changed. This leads to some difference between the fluid amount discharged from the discharge side of the vane 31 and the fluid amount sucked into the suction side of the vane 31. Moreover, under the forced push of an external forcing member 8 (as shown in
Accordingly, the above pump with variable suction/discharge amount can be applied to and assembled with a closed loop. The closed loop outputs and inputs an operation fluid to the vane chamber 230 and the external forcing member 8 forcedly pushes the pump to transfer the operation fluid. In the transfer process of the operation fluid, the pressure in the vane chamber 230 is changed. The change amount of the pressure acts between at least one of the movable wall member 22 and the movable vane chamber sleeve 23 and the fixed wall member 21, whereby the movable wall member 22 and/or the movable vane chamber sleeve 23 and the fixed wall member 21 displace relative to each other so as to change capacity of the vane chamber 230. Accordingly, the output amount and input amount of the operation fluid pushed by the rotating vane rotor 3 to pass the vane chamber 230 per unit time are variable with the change of the capacity of the vane chamber 230, whereby the vane rotor 3 can provide power transmission at different rotational speeds according to the change of the capacity of the vane chamber 230.
As shown in
Therefore, in application of the transmission drive device composed of the above components, in case the closed loop outputs and inputs an operation fluid to the respective vane chambers 230 of the active pump 101 and the passive pump 102, by means of the forced push of the external forcing member 8 or the change amount of the pressure applied to the interior of the vane chamber 230 by the operation fluid during the push and transfer process, the push acts between at least one of the movable wall member 22 and the movable vane chamber sleeve 23 and the fixed wall member 21, whereby the movable wall member 22 and/or the movable vane chamber sleeve 23 and the fixed wall member 21 displace relative to each other so as to change the capacity of the vane chamber 230. Accordingly, the active pump 101 and the passive pump 102 can make the rotational speeds of the corresponding vane rotors 3 in inverse proportion to each other respectively according to the change of the capacity of the corresponding vane chambers 230 to provide power transmission.
During the operation process of the active/passive pump loop, the movable wall members 22 and the movable vane chamber sleeves 23 of the active pump 101 and the passive pump 102 will continuously reciprocally axially displace. Therefore, the driving force applied to the vane 31 of the passive pump 102 by the active pump 101 will be interrupted. As a result, the rotation of the passive pump 102 will be undulated. Moreover, in the above embodiment, each of the active pump and the passive pump has one single vane chamber and one single vane. In case at the beginning of actuation of the passive pump, the vane of the passive pump is positioned in a position where the vane is right fully inlaid in the vane rotor, there is no vane face in the passive pump to bear the driving force. Under such circumstance, the active pump is situated in an invalid idling state and cannot apply any driving force to the passive pump. As a result, the entire loop will idle. In order to avoid the above condition of undulated operation or idling of the loop, as shown in FIG. 7-1, two active pumps 101 (or a active pump 101 with two eccentric vane chamber sections 2301) can be coupled with two passive pumps 102 (or a passive pump 102 with two eccentric vane chamber sections 2301). Alternatively, as shown in
According to the above active/passive pump driving loop, especially the structural form composed of four active pumps 101 and four passive pumps 102 coupled therewith as shown in
As shown in
Please further refer to
The second embodiment is most obviously different from the first embodiment in that the movable vane chamber sleeve 23 of the second embodiment can only axially displace relative to the vane rotor 3, while failing to synchronously rotate with the vane rotor 3. The suction/discharge passages 343, 344 of the second embodiment can be disposed on the suction side and the discharge side of the vane 31 of the impeller 30 of the vane rotor 3 as in the first embodiment.
According to the above design of the pump with variable suction/discharge amount of the present invention, in the condition that the original radial size is not increased, the pump with variable suction/discharge amount can truly effectively achieve the modulation function for the suction/discharge amount. The pump with variable suction/discharge amount of the present invention not only can effectively improve the shortcomings of the conventional pumps with variable suction/discharge amount, but also can be assembled to form a drive device capable of automatically modulating the rotational speed ratio between the pumps. The pump with variable suction/discharge amount of the present invention is indeed inventive and has high practical value.
The above embodiments are only used to illustrate the present invention, not intended to limit the scope thereof. Many modifications of the above embodiments can be made without departing from the spirit of the present invention.
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/CN2020/080389 | 3/20/2020 | WO |
