The invention relates to a rotary power motor, particularly to a rotary power motor equipped with a multi lobe motor ring and the manufacturing method thereof.
A conventional hydraulic rotary motor is typically manufactured in a way that vanes project from a rotor and rotate about a central axis of rotation. The motor includes housing where the vanes and the housing define a plurality of chambers. The motor typically has a single inlet for a working medium to enter the plurality of chambers and a single outlet for the working medium to exit the plurality of chambers where the torque to rotate the rotor is limited by the single pair of inlet and outlet.
The rotor in the conventional hydraulic rotary motor is designed to move in directions perpendicular to the central axis of rotation. A volume of each of the chambers in relation to an angular position of the chamber varies as the rotor moves in directions perpendicular to the central rotation axis during rotation of the rotor. In particular, the volume of a chamber is at its minimum and the pressure of the working medium in the chamber is at maximum as the chamber rotates past the inlet. The volume of the chamber increases and the pressure in the chamber decreases as the chamber approaches the outlet. Such a movable rotor induces uneven pressure loading and thus a severe side load to a shaft supporting the rotor. Additionally, the torque acting on each vane is not consistent during rotation of the rotor. Accordingly, it would be desirable to have a motor that addresses some of the issues described above.
In one aspect, there is provided a rotary motor, the rotary motor including: a plurality of vanes; an inner rotary member housing the plurality of vanes projecting from a central rotation axis of the inner rotor; a multi lobe member encompassing the inner rotary member and the plurality of vanes, wherein the multi lobe member includes at least two lobes wherein each of the lobes includes an inlet and an outlet for a working medium; and a plurality of chambers, wherein each of the chambers is encompassed by an inner surface of the multi lobe member and an outer surface of the inner rotary member.
In another aspect, there is provided a rotary motor, the rotary motor including: an inner rotary member; a plurality of end plates; a multi lobe member including 2 or more lobes wherein each of the lobes includes an inlet and an outlet for a working medium, wherein the working medium comprises a gas, air, fluid or a combination thereof, wherein the working medium entering the inlet port of the outer port member is pressurized, and wherein a compression ratio of the working medium is adjustable; and a plurality of vanes wherein a number of the vanes is larger than a number of the lobes.
In another aspect, there is provided a method for manufacturing a rotary motor, the method including: placing a plurality of vanes in an outer circumferential surface of an inner rotary member; forming a plurality of lobes each of which includes an inlet and an outlet; circumferentially arranging the lobes in an inner circumferential surface of a multi lobe member; configuring the lobes to form a contact with the outer circumferential surface of the inner rotary member; encompassing the plurality of vanes and the inner rotary member with the multi lobe member including an inlet groove and an outlet groove on an outer surface of the multi lobe member; forming a plurality of chambers wherein each chamber is placed between two adjacent lobes and is encompassed by the inner circumferential surface of the multi lobe member and the outer circumferential surface of the inner rotary member; encompassing the multi lobe member with an outer port member including an inlet port and an outlet port; and covering and sealing sides of the outer port member, the multi lobe member, the inner rotary member and the chambers with a plurality of end plates.
In still another aspect, there is provided an apparatus for use in a hydraulic torque system, the apparatus including: rotating means for housing a plurality of torque generating means; means for supplying a working medium to act on the torque generating means wherein the means for supplying the working medium includes two or more contacting portions, wherein each of the contacting portions includes an inlet and an outlet for the working medium, and wherein each of the contacting portions is in contact with at least one of an inner circumferential surface of the rotating means and the torque generating means; a plurality of means for holding the working medium, wherein each of the plurality of the means for holding the working medium is encompassed by an inner surface of the means for supplying the working medium and an outer surface of the rotating means, wherein the means for holding the working medium is placed between two contacting portions, and wherein each of the plurality of means for holding the working medium is configured to maintain an equal volume during rotation of the rotating means; means for enclosing the means for supplying the working medium; and means for covering and sealing the means for supplying the working medium and the rotating means.
There has thus been outlined, rather broadly, certain aspects of the invention in order that the detailed description thereof herein may be better understood, and in order that the present contribution to the art may be better appreciated. There are, of course, additional aspects of the invention that will be described below and which will form the subject matter of the claims appended hereto.
In this respect, before explaining at least one aspect of the invention in detail, it is to be understood that the invention is not limited in its application to the details of construction and to the arrangements of the components set forth in the following description or illustrated in the drawings. The invention is capable of aspects in addition to those described and of being practiced and carried out in various ways. Also, it is to be understood that the phraseology and terminology employed herein, as well as the abstract, are for the purpose of description and should not be regarded as limiting.
The invention will now be described with reference to the drawing figures, in which like reference numerals refer to like parts throughout. An embodiment in accordance with the present invention provides a rotary power motor. Such devices in accordance with some embodiments of the invention provide that a plurality of inlets and outlets amplify the output torque of the motor, that any side load is absent or minimized, and that a faster and stronger rotational force is achieved compared to a conventional hydraulic motor having a single pair of inlet and outlet.
In one aspect, a working medium entering the inlet port 11 of the outer port ring 10 may be received by the inlet flow groove 31 on the outer circumferential surface of the multi lobe motor ring 30. The working medium on the outlet flow groove 32 may be discharged by way of the outlet port 12. The working medium entering the inlet port 11 may be pressurized. In some aspects, the working medium may include air, fluid, gas, or a combination thereof. In various aspects, a compression ratio of the working medium may be adjustable, depending on the desired speed of the motor 100, the kind of the working medium, and the operating conditions of the motor 100.
The rotary power motor 100 may further include a drive 60. The drive 60 may pass through a central axis of the front and rear end plates, 21, 22 and the outer port ring 10. In one aspect, the drive 60 may not move in a direction perpendicular to the central axis during operation of the motor 100.
The outer port ring 10 may include one or more inlet and outlet ports 11, 12. In one aspect, the outer port ring 10 may include a single pair of inlet port 11 and outlet port 12 on a circumferential surface of the outer port ring 10. A working medium may enter into the rotary power motor 100 by way of the inlet port 11 and may be discharged by way of the outlet port 12. The outer port ring 10 may circumferentially enclose the multi lobe motor ring 30 (see
The multi lobe motor ring 30 may include a plurality of lobes 36. In one aspect, a number of the lobes 36 may be 2 or more, preferably, 6 or more. Optionally, a number of the lobes 36 may be 8 or more. Each of the plurality of lobes 36 may include a pair of inlet 34 and outlet 35. In one aspect, the inlet 34 and the outlet 35 in the pair may be positioned parallel to each other in a width direction of the multi lobe motor ring 30. In some aspects, the inlet 34 and the outlet 35 in the pair may be aligned at an angle with respect to the width direction of the multi lobe motor ring 30. The plurality of lobes 36 may be placed in an inner circumferential surface of the multi lobe motor ring 30. In one aspect, the plurality of lobes 36 may be periodically spaced at equal distances along the inner circumferential surface of the multi lobe motor ring 36.
Each lobe of the plurality of lobes 36 may be positioned at a planar or convex position of the inner circumferential surface of the multi lobe motor ring 30 where a concave working chamber 38 may be formed between two adjacent lobes 36. In one aspect, the inlets 34 at the plurality of lobes 36 may be aligned with the inlet flow groove 31 so that each of the inlets 34 can receive the working medium from the inlet flow groove 31 and introduce the working medium to the corresponding concave working chamber 38. Similarly, the outlets 35 at the plurality of lobes 36 may be aligned with the outlet flow groove 32 so that the outlet flow groove 32 can receive the working medium exiting the concave working chambers 38 by way of the outlets 35. Due to the continuous medium flow loop among the outer port ring 10, the multi lobe motor ring 30, and the chambers 38, the rotary medium power motor 100 may produce higher torque compared to a conventional hydraulic motor.
The inner rotor 50 may include one or more sealing ridges 51. The sealing ridge 51 may be placed between a side of the inner rotor 50 and the end plates 21, 22 (see
Each chamber 38 may have an equal volume with respect to each other. In some aspects, the rotation axis a0 of the inner rotor 50 may be fixed so that each chamber 38 may maintain the equal volume during rotation of the inner rotor 50. The working medium entering the inlet port 11 of the outer port ring 10 (see
Each chamber may produce an equal amount of torque acting on the vanes 40. The plurality of lobes including inlets 34 and outlets 35 may generate a torque arm at each of the plurality of the vanes 40. In one aspect, the torque rotating the motor 100 may be multiplied by the number of lobes 36. In various aspects, the rotary power motor 100 may need no side load and no secondary nut runner. In some aspects, all the input energy may be turned into continuous rotation and thus may achieve a faster and stronger rotational force compared to a conventional hydraulic motor.
The many features and advantages of the invention are apparent from the detailed specification, and, thus, it is intended by the appended claims to cover all such features and advantages of the invention which fall within the true spirit and scope of the invention. Further, since numerous modifications and variations will readily occur to those skilled in the art, it is not desired to limit the invention to the exact construction and operation illustrated and described, and, accordingly, all suitable modifications and equivalents may be resorted to that fall within the scope of the invention.