Patent Application
20240367699
The present invention relates to the technical field of railway vehicles, and particularly relates to an adjustable torsion bar system and an anti-roll method.
With the continuous improvement of requirements for vehicle operating speed and riding comfort, the existing vehicle suspension system is difficult to satisfy the safety and comfort requirements when a train passes through a curve at high speed. A tilting train can enable a vehicle body to actively tilt before the train reaches the curve, and to balance the centrifugal force on the curve by its own gravity, so compared with the traditional railway transit vehicles, the tilting train can better solve the problems of safety and comfort when passing through the curve at high speed.
An anti-rolling torsion bar is used to prevent the rolling of the railway vehicles caused by passage through the curve, strong wind and bump to ensure driving safety. When the vehicle body is in the active tilting, the anti-rolling torsion bar will hinder the vehicle body from the active tilting. Thus, it is necessary to improve the anti-rolling torsion bar.
When the railway vehicle is driven on a straight line or large curvature radius route, the anti-rolling torsion bar is required to provide a bidirectional anti-rolling torque to prevent the vehicle body from rolling to both sides; when the railway vehicle is driven on a small curvature radius route, the anti-rolling torsion bar is required to match with an air spring system to enable the vehicle body to tilt toward the inner side of the curve and to provide unidirectional anti-rolling torque to prevent the vehicle body from rolling toward the outer side of the curve. The anti-rolling torsion bar is required to provide the bidirectional anti-rolling torque and unidirectional anti-rolling torque to satisfy the safety driving requirements of the railway vehicle on different rails.
Through patent retrieval, the following patents are mainly related to the present application:
1. Chinese invention patent with application No. “201910683078.0”, application date “2019 Jul. 26”, publication No. “CN110329298A”, publication date “2019 Oct. 15”, title “a self-positioning adjustment method and device of an anti-rolling torsion bar” and applicant “Zhuzhou Times New Material Technology Co., Ltd.” In the patent for invention, the anti-rolling torsion bar connecting rod is divided into two parts from the middle, and connected through a self-positioning adjustment device in the middle of the two parts of the connecting rod, to form an anti-rolling torsion bar connecting rod with a self-positioning adjustment device; a self-positioning adjustment device with adjusting connecting rod length and self-positioning adjustment device is installed in the middle of the two parts of the connecting rod; the two parts of the connecting rod are connected through the self-positioning adjustment device with adjusting rod length and self-positioning adjusting device, so as to avoid affecting the life of connecting rod nodes due to the relative position deviation of the upper and lower connecting rod nodes of the adjustable vertical connecting rod during loading; meanwhile, the maintenance process of the product can be optimized, and the product overhaul can be completed by replacing the lock nuts without taking additional tooling. However, the length of the connecting rod in the patent can only be adjusted during installation or maintenance, cannot realize real-time unidirectional follow-up adjustment, and cannot provide unidirectional anti-rolling torque.
2. Chinese invention patent with application No. “202011125612.5”, application date “2020 Oct. 20”, publication No. “CN112158224A”, publication date “2021 Jan. 1”, title “a real-time active adjustment method of connecting rod length and an active anti-rolling torsion bar system” and applicant “Zhuzhou Times New Material Technology Co., Ltd.” The patent for invention relates to a real-time active adjustment method of connecting rod length: an active adjustment device is installed on the connecting rod, which can adjust the length of the connecting rod actively in real time according to the control instruction. Thus, the defect that the length of the traditional connecting rod is fixed and unadjustable is solved. The present invention further relates to an active anti-rolling torsion bar system, comprising: a connecting rod, a torsion bar and a supporting seat. The connecting rod is provided with a ball screw mechanism, which can adjust the length of the connecting rod rapidly in real time according to the control instructions, so that the torsion bar generates torsion deformation and then actively provides the anti-rolling torque for the vehicle body to realize the active adjustment of the rolling angle of the vehicle body, which helps to improve the speed and the safety of the train when passing through a curve, thereby increasing the operating speed of the train. However, the length of the connecting rod in the patent can only be adjusted actively, cannot realize unidirectional follow-up elongation or unidirectional follow-up shortening, and cannot provide unidirectional anti-rolling torque.
3. Chinese invention patent with application No. “202110004969.6”, application date “2021 Jan. 4”, publication No. “CN112644538A”, publication date “2021 Apr. 13”, title “a passive adjustment method of connecting rod length and a passive control torsion bar system” and applicant “Zhuzhou Times New Material Technology Co., Ltd.” The patent for invention relates to a passive adjustment method of connecting rod length: a passive adjustment device is installed on the connecting rod, which can be converted between two states of releasing and locking in real time according to the control instruction so that the connecting rod length can be adjusted or kept fixed. The present invention further relates to a passive control torsion bar system, comprising: a connecting rod, a torsion bar and a supporting seat. The connecting rod is provided with a passive adjustment device which can be converted between two states of releasing and locking in real time according to the control instruction so that the connecting rod length can be adjusted or kept fixed. When the vehicle is driven on a straight line or a large curvature radius route, the connecting rod length is kept fixed, so that the torsion bar system plays the anti-rolling role of the traditional torsion bar. When the vehicle passes through a curve, the connecting rod length can be freely elongated and shortened with the active tilting system to adjust the side rolling angle of the vehicle body in cooperation with the tilting system. However, the connecting rod in the patent can only be converted between locking and free elongation and shortening, and the length of the connecting rod cannot realize unidirectional follow-up elongation or unidirectional follow-up shortening, and cannot provide unidirectional anti-rolling torque.
4. Patent for utility model with application No. “201621408157.9”, application date “2016 Dec. 21”, publication No. “CN206265060U”, publication date “2017 Jun. 20”, title “an adjustable anti-rolling torsion bar connecting rod” and applicant “Nanjing Railway New Technology Co., Ltd.” The patent for utility model discloses an adjustable anti-rolling torsion bar connecting rod, comprising a connecting rod shaft, a connecting rod joint, a knuckle bearing, a retaining ring, etc. Both ends of the connecting rod shaft are connected with the knuckle bearing; side surfaces of both ends of the connecting rod shaft comprise a connecting rod inner hole and an inner hole groove; a retaining ring is arranged in the inner hole groove; and the knuckle bearing is inserted into the connecting rod inner hole. The connecting rod joint is also arranged on the connecting rod shaft, and the connecting rod joint is arranged at one end of the connecting rod. However, the length of the connecting rod in the patent can only be adjusted during installation or maintenance, cannot realize real-time unidirectional follow-up adjustment, and cannot provide unidirectional anti-rolling torque.
5. Patent for utility model with application No. “201621166973.3”, application date “2016 Nov. 2”, publication No. “CN206141565U”, publication date “2017 May 3”, title “an anti-rolling torsion bar device for a linear motor vehicle with an adjustable vertical connecting rod” and applicant “Zhuzhou Times New Material Technology Co., Ltd.” The patent for utility model discloses an anti-rolling torsion bar device for a linear motor vehicle with an adjustable vertical connecting rod, comprising a torsion bar shaft, a torsion arm, a supporting seat composition and a vertical connecting rod. The vertical connecting rod comprises a left-turning ball head, a vertical connecting rod and a right-turning ball head. The upper end and the lower end of the vertical connecting rod are arranged as tubes with internal threads, and the internal threads at both ends of the vertical connecting rod are opposite. The left-turning ball head and the right-turning ball head are respectively connected to the upper end and the lower end of the vertical connecting rod by means of threaded connection. However, the length of the connecting rod in the patent can only be adjusted during installation or maintenance, cannot realize real-time unidirectional follow-up adjustment, and cannot provide unidirectional anti-rolling torque.
However, the above patent is different from the technical solution in the present application, and the length of the connecting rods cannot realize real-time unidirectional follow-up adjustment, and cannot provide unidirectional anti-rolling torque.
A technical problem to be solved in the present invention is to overcome the defects in the prior art, to provide an adjustable torsion bar system and an anti-roll method.
To solve the above technical problems, the present invention adopts the following technical solution: an adjustable torsion bar system comprises: a torsion bar, a left connecting rod and a right connecting rod; the torsion bar is fixed on a bogie/vehicle body; both ends of the torsion bar are hinged with one end of the left connecting rod and the right connecting rod respectively; and the other ends of the left connecting rod and the right connecting rod are hinged with both sides of the vehicle body/bogie respectively. The left connecting rod and the right connecting rod are adjustable hydraulic connecting rods. The length of the connecting rods can be transformed between the states of fixedness and unidirectional follow-up elongation or unidirectional follow-up shortening so that the torsion bar system provides a bidirectional anti-rolling torque or unidirectional anti-rolling torque to satisfy the safety driving requirements of the railway vehicle on different rails.
Further, each hydraulic connecting rod comprises: a rod body, a piston and a control component; the piston is movably arranged in the rod body; the rod body is divided into a liquid cavity I and a liquid cavity II: the liquid cavity I and the liquid cavity II are filled with liquid media; The liquid cavity I and the liquid cavity II are connected or disconnected through the control component and a flow channel so that the length of the connecting rods is unchanged, is freely elongated or shortened and can realize unidirectional follow-up elongation or unidirectional follow-up shortening, so as to change the characteristics of the hydraulic connecting rods.
Further, a rod I is arranged in the liquid cavity I, one end of the rod I is connected with one side of the piston, and the other end of the rod I hermetically penetrates out from the liquid cavity I; a rod II is arranged in the liquid cavity II, one end of the rod II is connected with the other side of the piston, and the other end of the rod II hermetically penetrates out from the liquid cavity II; the rod I and the rod II are cylindrical, and the diameter of the rod I is the same as the diameter of the rod II; the rod I and the rod II move with the piston in the rod body; and when the piston moves in the rod body, the reduced volume or increased volume of the liquid cavity I is equal to the increased volume or reduced volume of the liquid cavity II. The hydraulic connecting rods do not need a hydraulic station or oil source, do not need other liquid storage containers, and have simple structure and adjustable connecting rod length.
Further, the flow channel comprises a flow channel I and a flow channel II, and the control component comprises straight-through valves and check valves; a straight-through valve I and a check valve I are arranged on the flow channel I; the liquid media in the liquid cavity I can only flow to the liquid cavity II through the check valve I and the straight-through valve I; a straight-through valve II and a check valve II are arranged on the flow channel II; and the liquid media in the liquid cavity II can only flow to the liquid cavity I through the check valve II and the straight-through valve II. By controlling the unidirectional flow of the liquid media, the length of the connecting rods can realize unidirectional follow-up elongation or unidirectional follow-up shortening.
Further, the length of the connecting rods remains unchanged when the straight-through valve I and the straight-through valve II are both disconnected, so that the torsion bar system can provide the bidirectional anti-rolling torque.
Further, when the straight-through valve I is connected and the straight-through valve II is disconnected, the liquid media in the liquid cavity I can only flow to the liquid cavity II through the flow channel I, the liquid media in the liquid cavity II cannot flow to the liquid cavity I and the length of the connecting rod is freely elongated under the action of tension; and when the tension is converted into pressure, the length of the connecting rod remains unchanged, and the hydraulic connecting rod is in a state of unidirectional follow-up elongation.
Further, when the straight-through valve I is disconnected and the straight-through valve II is connected, the liquid media in the liquid cavity II can only flow to the liquid cavity I through the flow channel II, the liquid media in the liquid cavity I cannot flow to the liquid cavity II and the length of the connecting rod is freely shortened under the action of pressure; and when the pressure is converted into tension, the length of the connecting rod remains unchanged, and the hydraulic connecting rod is in a state of unidirectional follow-up shortening.
The present application further relates to an anti-roll method: when the railway vehicle is driven on a straight rail or the vehicle does not need to actively tilt, the adjustable torsion bar system is controlled to be in a bidirectional anti-rolling state, and the adjustable torsion bar system provides the bidirectional anti-rolling torque; when the railway vehicle needs to actively tilt, the adjustable torsion bar system is controlled to be in a unidirectional anti-rolling state, and the adjustable torsion bar system may not prevent the railway vehicle from tilting to the inner side of the curve. Once the railway vehicle has a tendency to roll to the outer side of the curve, the adjustable torsion bar system provides the unidirectional anti-rolling torque to prevent the railway vehicle from rolling to the outer side of the curve to ensure the driving safety.
Further, when the railway vehicle is driven in a straight line, a left straight-through valve I and a left straight-through valve II are controlled to be in a disconnected state, and the length of the left connecting rod is kept unchanged; and a right straight-through valve I and a right straight-through valve II are controlled to be in a disconnected state, and the length of the right connecting rod is kept unchanged. At this moment, the adjustable torsion bar system provides the bidirectional anti-rolling torque.
Further, when the railway vehicle is driven in a left-turning transition curve, the left straight-through valve I and the left straight-through valve II are controlled to be in a disconnected state, and the length of the left connecting rod is kept unchanged; or the left straight-through valve I is controlled to be in a disconnected state, the left straight-through valve II is controlled to be in a connected state, and the left connecting rod is controlled to be in a unidirectional follow-up shortening state; the right straight-through valve I is controlled to be in a connected state, the right straight-through valve II is controlled to be in a disconnected state, and the right connecting rod is controlled to be in a unidirectional follow-up elongation state. At this time, the adjustable torsion bar system may not prevent the railway vehicle from rolling to the left, and only provides a right anti-rolling torque to prevent the railway vehicle from rolling to the right.
When the railway vehicle is driven on a left-turning curve, the left straight-through valve I and the left straight-through valve II are controlled to be in a disconnected state, and the length of the left connecting rod is kept unchanged; and the right straight-through valve I and the right straight-through valve II are controlled to be in a disconnected state, and the length of the right connecting rod is kept unchanged. At this moment, the adjustable torsion bar system provides the bidirectional anti-rolling torque to prevent the railway vehicle from conducting bidirectional rolling.
When the railway vehicle leaves the left-turning curve and enters a left-turning transition curve, the left straight-through valve I and the left straight-through valve II are controlled to be in a disconnected state, and the length of the left connecting rod is kept unchanged; or the left straight-through valve I is controlled to be in a connected state, the left straight-through valve II is controlled to be in a disconnected state and the left connecting rod is controlled to be in a unidirectional follow-up elongation state; and the right straight-through valve I is controlled to be in a disconnected state, the right straight-through valve II is controlled to be in a connected state and the right connecting rod is controlled to be in a unidirectional follow-up contraction state. At this moment, the adjustable torsion bar system provides a left anti-rolling torque only to prevent the railway vehicle from rolling to the left, without preventing the railway vehicle from returning to a horizontal state from a left tilting state.
When the railway vehicle leaves the left-turning transition curve and enters a straight line, the left straight-through valve I and the left straight-through valve II are controlled to be in a disconnected state, and the length of the left connecting rod is kept unchanged; the right straight-through valve I and the right straight-through valve II are controlled to be in a disconnected state, and the length of the right connecting rod is kept unchanged. At this moment, the adjustable torsion bar system provides the bidirectional anti-rolling torque.
When the railway vehicle is driven on a right-turning transition curve, the left straight-through valve I is controlled to be in a connected state, the left straight-through valve II is controlled to be in a disconnected state and the left connecting rod is controlled to be in a unidirectional follow-up elongation state; the right straight-through valve I and the right straight-through valve II are controlled to be in a disconnected state, and the length of the right connecting rod is kept unchanged; or the right straight-through valve I is controlled to be in a disconnected state, the right straight-through valve II is controlled to be in a connected state, and the right connecting rod is controlled to be in a unidirectional follow-up shortening state. At this time, the adjustable torsion bar system may not prevent the railway vehicle from rolling to the right, and only provides a left anti-rolling torque to prevent the railway vehicle from rolling to the left.
When the railway vehicle is driven on a right-turning curve, the left straight-through valve I and the left straight-through valve II are controlled to be in a disconnected state, and the length of the left connecting rod is kept unchanged; the right straight-through valve I and the right straight-through valve II are controlled to be in a disconnected state, and the length of the right connecting rod is kept unchanged. At this moment, the adjustable torsion bar system provides the bidirectional anti-rolling torque to prevent the railway vehicle from conducting bidirectional rolling.
When the railway vehicle leaves the right-turning curve and enters a right-turning transition curve, the left straight-through valve I is controlled to be in a disconnected state, the left straight-through valve II is controlled to be in a connected state and the left connecting rod is controlled to be in a unidirectional follow-up shortening state; the right straight-through valve I and the right straight-through valve II are controlled to be in a disconnected state, and the length of the right connecting rod is kept unchanged; or the left straight-through valve I is controlled to be in a connected state, the left straight-through valve II is controlled to be in a disconnected state and the left connecting rod is controlled to be in a unidirectional follow-up elongation state. At this moment, the adjustable torsion bar system provides the right anti-rolling torque only to prevent the railway vehicle from rolling to the right, without preventing the railway vehicle from returning to the horizontal state from the right tilting state.
When the railway vehicle leaves the right-turning transition curve and enters a straight line, the left straight-through valve I and the left straight-through valve II are controlled to be in a disconnected state, and the length of the left connecting rod is kept unchanged; the right straight-through valve I and the right straight-through valve II are controlled to be in a disconnected state, and the length of the right connecting rod is kept unchanged. At this moment, the adjustable torsion bar system provides the bidirectional anti-rolling torque.
The present invention has the beneficial effects: the adjustable torsion bar system is formed through the adjustable hydraulic connecting rods; and by controlling the flow of the liquid media, the characteristics of the hydraulic connecting rods are changed so that the length of the connecting rods has the characteristics of unchanged, unidirectional follow-up elongation or unidirectional follow-up shortening. Thus, the anti-rolling torsion bar system can provide the bidirectional anti-rolling torque or unidirectional anti-rolling torque to satisfy the safety driving requirements of the railway vehicle on different rails.
In the figures: 1—spherical hinge I; 2—rod I; 3—rod body; 31—liquid cavity I; 32—liquid cavity II; 33—balancing cavity; 4—piston; 5—rod II; 6—spherical hinge II; 7—flow channel I; 71—straight-through valve I; 72—check valve I; 8—flow channel II; 81—straight-through valve II; 82—check valve II; 10—left connecting rod; 171—left straight-through valve I; 181—straight-through valve II; 20—torsion bar; 30—right connecting rod; 371—right straight-through valve I; 372—right straight-through valve II; h1—initial connecting rod length; h2—maximum connecting rod length; h3—minimum connecting rod length; U—liquid flow direction; V—connecting rod follow-up direction.
The present invention is further described below through specific embodiments in combination with drawings.
The adjustable torsion bar system, as shown in
The hydraulic connecting rod is shown in
a spherical hinge I1, a rod I 2, a rod body 3, a piston 4, a rod II 5, a spherical hinge II 6, a flow channel I 7 and a flow channel II 8; the flow channel I 7 is provided with a straight-through valve I 71 and a check valve I 72 and the flow channel II 8 is provided with a straight-through valve II 81 and a check valve II 82.
The piston 4 is movably arranged in the rod body 3; the rod body 3 is divided into a liquid cavity I 31 and a liquid cavity II 32; and the liquid cavity I 31 and the liquid cavity II 32 are filled with liquid media. The rod I 2 is arranged in the liquid cavity I 31, the rod I 2 is connected with the piston 4 by threads, and the other end of the rod I 2 hermetically penetrates out from the liquid cavity I 31; the rod II 5 is arranged in the liquid cavity II 32, the rod II 5 is integrally formed with the piston 4, and the other end of the rod II 5 hermetically penetrates out from the liquid cavity II 32; the rod I 2 and the rod II 5 are cylindrical, the rod I 2 and the rod II 5 move with the piston 4 in the rod body 3 and the diameter of the rod I 2 is the same as the diameter of the rod II 5. A balancing cavity 33 is arranged in the rod body 3 along the moving direction of the piston 4, and the other end of the rod II 5 is movably arranged in the balancing cavity 33; and the balancing cavity 33 is communicated with the atmosphere through a vent.
The liquid cavity I 31 is communicated with the liquid cavity II 32 through the flow channel I 7 and the flow channel II 8. When the piston 4 moves in the rod body 3, the liquid media flow only between the liquid cavity I 31 and the liquid cavity II 32. The reduced volume or increased volume of the liquid cavity I 31 is equal to the increased volume or reduced volume of the liquid cavity II 32.
The straight-through valve I 71 and the check valve I 72 are arranged on the flow channel 17, and the liquid media in the liquid cavity I 31 can only flow to the liquid cavity II 32 through the check valve I 72 and the straight-through valve I 71. The straight-through valve I 71 adopts a normally closed solenoid valve. The straight-through valve I 71 is integrated with the check valve I 72 and installed on the outer circumference of the rod body 3. The straight-through valve II 81 and the check valve II 82 are arranged on the flow channel II 8. The straight-through valve II 81 is integrated with the check valve II 72 and installed on the outer circumference of the rod body 3. The liquid media in the liquid cavity II 32 can only flow to the liquid cavity I 31 through the check valve II 82 and the straight-through valve II 81. The straight-through valve II 81 adopts a normally closed solenoid valve.
When the length of the connecting rod remains unchanged, as shown in
Conversely, if the hydraulic connecting rod bears pressure, the rod I 2 has a tendency to drive the piston 4 to move downward. The pressure in the liquid cavity I 31 is decreased to form negative pressure, and the pressure in the liquid cavity II 32 is increased sharply. An upward pressure difference is formed on both sides of the piston 4, and the pressure difference acts on the piston 4 to form an upward balance force which is balanced with the pressure borne by the hydraulic connecting rod. The piston 4 also may not move, so that the length of the connecting rod remains unchanged.
When the connecting rod is under unidirectional follow-up elongation, as shown in
When the connecting rod is under unidirectional follow-up shortening, as shown in
The present application further relates to an anti-roll method that adopts the adjustable torsion bar system: when the railway vehicle is driven on a straight rail, the adjustable torsion bar system is controlled to be in a bidirectional anti-rolling state, and the adjustable torsion bar system provides the bidirectional anti-rolling torque; and when the railway vehicle is driven on a curve rail, the adjustable torsion bar system is controlled to be in a unidirectional anti-rolling state, and the adjustable torsion bar system may not prevent the railway vehicle from tilting to the inner side of the curve. Once the railway vehicle has a tendency to roll to the outer side of the curve, the adjustable torsion bar system provides the unidirectional anti-rolling torque to prevent the railway vehicle from rolling to the outer side of the curve to ensure the driving safety.
As shown in
In the process of driving on the left-turning curve, the adjustable torsion bar system is shown in
As shown in
As shown in
As shown in
When the railway vehicle leaves the left-turning transition curve and enters a straight line, after the left connecting rod 10 is elongated, the length of the left connecting rod is elongated from h3 to h1; and after the right connecting rod 30 is shortened, the length of the right connecting rod is shortened from h2 to h1. At this moment, the left straight-through valve I 171 and the left straight-through valve II 181 on the left connecting rod 10 are controlled to be in a disconnected state, and the length of the left connecting rod 10 is kept unchanged; and the right straight-through valve I 371 and the right straight-through valve II 381 on the right connecting rod 30 are controlled to be in a disconnected state, and the length of the right connecting rod 30 is kept unchanged. At this moment, the adjustable torsion bar system provides the bidirectional anti-rolling torque.
In the process of driving on the right-turning curve, the adjustable torsion bar system is shown in
As shown in
As shown in
As shown in
When the railway vehicle leaves the right-turning transition curve and enters a straight
line, after the left connecting rod 10 is shortened, the length of the left connecting rod is shortened from h2 to h1; the length of the right connecting rod 30 is kept as h1, or elongated from h3 to h1. At this moment, the left straight-through valve I 171 and the left straight-through valve II 171 on the left connecting rod 10 are controlled to be in a disconnected state, and the length of the left connecting rod 10 is kept unchanged; and the right straight-through valve I 371 and the right straight-through valve II 381 on the right connecting rod 30 are controlled to be in a disconnected state, and the length of the right connecting rod 30 is kept unchanged. At this moment, the adjustable torsion bar system provides the bidirectional anti-rolling torque.
In conclusion: the present invention has the beneficial effects: the adjustable torsion bar
system is formed through the adjustable hydraulic connecting rods; and by controlling the flow of the liquid media, the characteristics of the hydraulic connecting rods are changed so that the length of the connecting rods has the characteristics of unchanged, unidirectional follow-up elongation or unidirectional follow-up shortening. Thus, the anti-rolling torsion bar system can provide the bidirectional anti-rolling torque or unidirectional anti-rolling torque to satisfy the safety driving requirements of the railway vehicle on different rails.
The above embodiments are merely used for illustration of the present invention, and not intended to limit the present invention. Various changes or transformations can also be made by those skilled in the art without departing from the spirit and the scope of the present invention. Therefore, all equivalent technical solutions shall also belong to the protection scope of the present invention, and the protection scope of the present invention shall be defined by the claims.
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/CN2022/090557 | 4/29/2022 | WO |
