Self-compensation flow distribution device and inner curve hydraulic motor

Abstract

The invention relates to the technical field of shell rotating type hydraulic motors, in particular to a self-compensation flow distribution device and an inner curve hydraulic motor. The self-compensation flow distribution device comprises a flow distribution disc, a plurality of connecting keys, an annular connecting plate, a plurality of spring devices and an annular spring mounting base, a plurality of connecting key mounting grooves and bosses are evenly arranged on the outer circumference of the flow distribution disc in the circumferential direction, the lower portions of the connecting keys are clamped in the connecting key mounting grooves and fixed to the connecting plate, and the connecting key mounting grooves and the bosses are connected through the spring devices. The right side walls of the connecting key mounting groove and the boss abut against the connecting plate in an attached mode, the left side face of the spring device makes contact with the right side face of the connecting plate, and the spring mounting base is fixed to the connecting plate through a pin. When the axial gap of the working face is enlarged in the working process, under the action of the elastic force of the spring, the valve plate assembly automatically compensates and moves leftwards, it is guaranteed that the valve plate assembly is tightly attached to the working face of the cylinder body all the time, and therefore leakage between a friction pair cannot be increased.

Description

Technical Field

[0001] This application relates to the field of shell-rotating hydraulic motor technology, specifically to a self-compensating flow distribution device and an internal curve hydraulic motor. Background Technology

[0002] The statements in this section are merely to provide background information related to the technical solutions of this application to aid understanding, and do not necessarily constitute prior art for the technical solutions of this application.

[0003] When aircraft use low-speed, high-torque internal curve motors for taxiing and reversing, the internal curve motor is often a shell-rotor structure, meaning that the parts related to the inner ring of the motor are stationary, including the cylinder, plunger, rollers, and oiler, while the parts related to the outer ring of the motor are rotating, including the internal curve rotor, housing, and distributor plate.

[0004] The friction pair between the distributor plate and the cylinder working surface will inevitably experience wear during operation. As the working time increases, if there is no compensation between the two, a large gap will be generated in the axial direction, which will increase leakage and affect the working efficiency and overall performance of the motor.

[0005] Therefore, it is necessary to design a distribution plate with self-compensation to solve its oil leakage problem. Summary of the Invention

[0006] To address the problems in existing technologies, this invention proposes a self-compensating flow distribution device and an internal curve hydraulic motor, the specific solution of which is as follows:

[0007] A self-compensating distribution device includes: a distribution plate, multiple connecting keys, an annular connecting plate, multiple spring devices, and an annular spring mounting base.

[0008] The distribution plate is a horizontal hollow cylindrical structure. Multiple symmetrical key mounting slots and multiple symmetrical bosses are evenly arranged circumferentially on the outer circumference of the distribution plate. The upper width of the key is greater than the groove width of the key mounting slot, and the lower width is not greater than the groove width of the key mounting slot. The lower part of the key is engaged within the key mounting slot. Bolts pass through the lower part of the connecting plate and the key, and are tightened and fixed on the left side of the key via self-locking nuts. The left side of the connecting plate abuts against the right side wall of the key mounting slot. The right side wall of the boss abuts against the left side of the connecting plate.

[0009] The left side of the distribution plate is provided with a plurality of oil distribution holes evenly distributed along the circumference, and the connecting key mounting groove and the boss are both located on the radial outer side of the oil distribution holes.

[0010] The spring device includes a pressing piston, a pressing spring, and a spring seat connected in sequence. The spring device is installed in the mounting hole of the spring mounting seat. The left side of the pressing piston is in contact with the right side of the connecting plate. The connecting plate and the spring mounting seat are fixed horizontally by multiple pins. There are multiple symmetrical spring devices.

[0011] Furthermore, the spring device has at least two symmetrical springs located on the right side of the connecting plate that is in contact with the connecting key or the boss.

[0012] Furthermore, the bolt passes through the countersunk hole of the connecting plate and connects to the lower part of the connecting key.

[0013] Furthermore, the left side of the pin consists of a connecting plate and a boss in sequence.

[0014] Furthermore, the outer edges of the connecting key mounting groove and the boss are on the same circumference.

[0015] A shell-rotating internal curve hydraulic motor equipped with the above-mentioned self-compensating flow distribution device further includes: a shell, a cylinder and an oiler;

[0016] The distribution plate of the self-compensating distribution device is sleeved on the oiler. The left side of the distribution plate is in contact with the right side of the cylinder. A plunger groove is provided in the cylinder. A plunger and a roller are provided in the plunger groove. An oil flow channel is provided between the right side of the cylinder and the plunger groove. The housing contains a rotor. The roller is in contact with the rotor. The supporting bottom surface of the spring mounting seat is fixedly connected to the housing.

[0017] The oiler has three outer cylindrical surfaces with progressively increasing outer diameters from left to right on its outer periphery, and the distributor plate has three inner cylindrical surfaces with progressively increasing inner diameters from left to right on its inner periphery. The horizontal width of the leftmost outer cylindrical surface is greater than the horizontal width of the leftmost inner cylindrical surface. The outer cylindrical surface and the inner cylindrical surface abut against each other, forming an oil passage annular groove A and an oil passage annular groove B.

[0018] The oiler has an A oil passage and a B oil passage. An A oil passage hole is provided in the oiler, connecting the A oil passage and the A oil ring groove, and an B oil passage hole is provided, connecting the B oil passage and the B oil ring groove. An A oil passage hole is provided in the distribution plate, connecting the A oil ring groove and the A distribution hole, and an B oil passage hole is provided, connecting the B oil ring groove and the B distribution hole.

[0019] Furthermore, cylindrical annular grooves are formed on the outer cylindrical surface of the oil pipe, and a first dynamic sealing ring, a second dynamic sealing ring, and a third dynamic sealing ring are sequentially installed in each cylindrical annular groove.

[0020] The beneficial effects of this invention are as follows: This invention can be widely applied to various shell-rotating internal curve motors. Through the self-compensating flow distribution device of this invention, the flow distribution and self-compensation problems between two relatively moving parts can be solved. Under the action of the compression spring, the compression piston is subjected to a leftward elastic force. All the spring forces act on the boss of the distribution plate or the right side plane of the connecting keyway through the connecting plate, thereby causing the distribution plate to tightly press its working surface against the corresponding working surface of the cylinder under the action of this elastic force. When wear occurs during operation, causing its axial clearance to increase, the entire distribution plate assembly automatically compensates under the action of the spring force, moving to the left to always ensure tight contact with the working surface of the cylinder, thus keeping its axial clearance essentially unchanged. This prevents the leakage between the friction pairs from increasing, thereby ensuring the working efficiency and overall performance of the motor. This invention has a simple structure and is easy to process and assemble. Attached Figure Description

[0021] The embodiments of the present invention will be further described below with reference to the accompanying drawings, wherein:

[0022] Figure 1 This is a front view of a self-compensating distribution device according to the present invention;

[0023] Figure 2 This is a three-dimensional structural diagram of the connecting key portion in the device of the present invention;

[0024] Figure 3 This is a three-dimensional structural diagram of the pin portion in the device of the present invention;

[0025] Figure 4 for Figure 1 Schematic diagram of cross-sectional structure in the FF direction. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the invention.

[0027] like Figure 1-4 As shown, a self-compensating distribution device includes: a distribution plate 2, four connecting keys 5, an annular connecting plate 6, eight spring devices, and an annular spring mounting base 10.

[0028] The distribution plate 2 is a horizontal hollow cylindrical structure. Four symmetrical key mounting slots 2-2 are evenly distributed along the circumference of the outer circumference of the distribution plate 2, specifically located at the top, bottom, left, and right positions of the circumference, along with twelve symmetrical bosses 2-1, evenly and symmetrically distributed on the circumference. That is, there are three bosses 2-1 between every two key mounting slots 2-2. The outer edges of the key mounting slots 2-2 and the bosses 2-1 are on the same circumference. The upper width of the key 5 is greater than the key mounting... The width of the groove in slot 2-1 is not greater than the width of the groove in key mounting slot 2-2. The lower part of key 5 is inserted into key mounting slot 2-2, and the upper part protrudes to connect with the housing. Bolt 3 passes through the countersunk hole of connecting plate 6 and connects with the lower part of key 5. It is tightened and fixed on the left side of key 5 by self-locking nut 4. The left side of connecting plate 6 abuts against the right side wall of key mounting slot 2-2. The right side wall of boss 2-1 abuts against the left side of connecting plate 6.

[0029] Multiple oil distribution holes are evenly opened along the circumference on the left vertical surface of the distribution plate 2, and the connecting key mounting groove 2-2 and the boss 2-1 are both located on the radial outer side of the oil distribution holes.

[0030] The spring device includes a pressing piston 7, a pressing spring 8, and a spring seat 9 connected in sequence. The spring device is installed in the mounting hole of the spring mounting seat 10. There is still a certain gap between the outer edge of the mounting hole of the spring mounting seat 10 and the connecting plate 6. The left side of the pressing piston 7 is in contact with the right side of the connecting plate 6. The connecting plate 6 and the spring mounting seat 10 are fixed horizontally by multiple pins 14. The left side of the connecting plate 6 to the left of each pin 14 is a boss 2-1. There are eight spring devices that are evenly distributed and symmetrical, four of which are located on the right side of the connecting plate 6 connected to the connecting key 5, and four are located on the right side of the connecting plate 6 that is in contact with the boss 2-1.

[0031] A shell-rotating internal curve hydraulic motor equipped with the above-mentioned self-compensating flow distribution device further includes: a shell, a cylinder and an oiler 1;

[0032] The distribution plate 2 of the self-compensating distribution device is sleeved on the oiler 1. The left side of the distribution plate 2 is the working surface, which is in contact with the right side of the cylinder body. A plunger groove is opened in the cylinder body, and a plunger and a roller are arranged in the plunger groove. An oil flow channel is opened between the right side of the cylinder body and the plunger groove. The housing contains a rotor, and the roller is in contact with the rotor. The supporting bottom surface of the spring mounting seat 10 is fixedly connected to the housing. The connecting key 5 is fixedly connected to the housing.

[0033] The oiler 1 has three outer cylindrical surfaces with progressively increasing outer diameters from left to right on its outer periphery. The distribution plate 2 has three inner cylindrical surfaces with progressively increasing inner diameters from left to right on its inner periphery. The horizontal width of the leftmost outer cylindrical surface is greater than the horizontal width of the leftmost inner cylindrical surface. The outer cylindrical surface and the inner cylindrical surface abut each other, forming an oil passage groove A 15 and an oil passage groove B 19. That is, an oil passage groove A 15 is formed between the leftmost inner and outer cylindrical surfaces and the middle inner and outer cylindrical surfaces, and an oil passage groove B 19 is formed between the rightmost inner and outer cylindrical surfaces and the middle inner and outer cylindrical surfaces.

[0034] The oil connector 1 has an A oil passage and a B oil passage. An A oil passage hole 18 connects the A oil passage and the A oil passage annular groove 15, and a B oil passage hole 22 connects the B oil passage and the B oil passage annular groove 19. The distribution plate 2 has an A oil passage hole 17 connects the A oil passage annular groove 15 and the A distribution hole 16, and a B oil passage hole 21 connects the B oil passage annular groove 19 and the B distribution hole 20. Cylindrical annular grooves are formed on the outer cylindrical surface of the oil connector 1, and a first dynamic sealing ring 11, a second dynamic sealing ring 12, and a third dynamic sealing ring 13 are sequentially installed in each cylindrical annular groove.

[0035] During installation, pass the bolt 3 through the countersunk hole of the connecting plate 6, pass the connecting key 5 through the bolt 3 in the direction shown in the figure, and tighten it with the self-locking nut 4. Install the other three connecting keys 5 in the same way.

[0036] Place the spring seat 9, the compression spring 8, and the compression piston 7 into the mounting holes of the spring mounting base 10 one after another. Then, install the remaining seven spring seats 9, compression springs 8, and compression pistons 7 in the same way.

[0037] The connecting plate 6 with the connecting key 5 is fitted from right to left onto the right side of the boss 2-1 and the connecting key mounting groove 2-2 of the distribution plate 2, and the connecting key 5 is secured in the connecting key mounting groove 2-2 until the left end face of the connecting plate is in contact with the right side plane of the outer ring boss and the connecting key groove of the distribution plate 2. Then, the spring mounting seat 10 with the spring seat 9, the pressure spring 8, and the pressure piston 7 is installed from right to left onto the outer cylindrical surface of the distribution plate 2. The spring mounting seat 10 and the connecting plate 6 are circumferentially limited by the pin 14.

[0038] Install the dynamic sealing ring 11, dynamic sealing ring 12, and dynamic sealing ring 13 into the corresponding mounting slots of the oil pipe 1.

[0039] The distributor plate 2, which has a connecting plate 6 and a spring mounting base 10, is installed on the oiler 1 from left to right.

[0040] During operation, the oiler 1 is fixed and does not move axially. The spring mounting base 10 is also fixed and does not move, as its bottom surface is tightly attached to the outer shell. Under the action of the compression spring 8, the compression piston 7 is subjected to a leftward elastic force. All the spring forces are applied to the right side plane of the boss and connecting keyway of the distributor plate 2 through the connecting plate 6. This makes the distributor plate 2 tightly adhere to the corresponding working surface of the cylinder under the action of the elastic force. When wear occurs during operation and the axial clearance increases, the entire distributor plate assembly automatically compensates and moves to the left under the action of the spring force, always ensuring that it is tightly attached to the working surface of the cylinder.

[0041] At the same time, whether high-pressure oil is connected to port A or port B, when the pressure has not yet been established, a separation force will be generated between the distribution plate and the working surface of the cylinder, causing them to tend to separate. High-pressure oil will leak from between the working surfaces, and the distribution function cannot be achieved. With this self-compensating distribution device, since the spring force is always present, it ensures that the working surfaces will not separate before the pressure is established, resulting in high-pressure oil leakage.

[0042] The function of dynamic sealing rings 11, 12, and 13 is to lubricate and seal the relative movement between the corresponding cylindrical surfaces of the distribution plate 2 and the oiler 1, prevent high-pressure oil from leaking back to the housing, reduce the wear of the relative moving working surfaces of the distribution plate 2 and the oiler 1, and improve the working life and reliability of the friction pair.

[0043] When high-pressure oil is connected to port A, the high-pressure oil flows through the A oil passage hole, into the A oil passage ring groove, through the A oil passage hole and the A distribution hole, and then into the cylinder block plunger mounting hole. This causes the inner curved rotor to rotate, which in turn drives the outer casing to rotate. The rotation of the outer casing drives the distribution plate 2 to rotate via the connecting key 5 for distribution. At this time, port B is the low-pressure outlet, and the distribution plate rotates in one direction.

[0044] When high-pressure oil is connected to port B, the high-pressure oil flows through the B oil passage hole, into the B oil passage ring groove, through the B oil passage hole and the B distribution hole, and then into the cylinder block plunger mounting hole. This causes the inner curved rotor to rotate, which in turn drives the outer casing to rotate. The rotation of the outer casing drives the distribution plate 2 to rotate via the connecting key 5 for distribution. At this time, port A is the low-pressure outlet, and the distribution plate rotates in the opposite direction to when high-pressure oil is connected to port A.

[0045] In this application, front and back, left and right, and up and down are all relative positions and do not serve as limitations.

[0046] The foregoing descriptions have outlined some exemplary embodiments of the present invention. It is understood that these embodiments are merely illustrative and do not constitute a limitation on the scope of protection of the present invention. Features in these embodiments can be rearranged in suitable ways, and the resulting solutions remain within the scope of protection claimed by the present invention. All other embodiments obtained by those skilled in the art based on the foregoing embodiments without inventive effort, i.e., all modifications, equivalent substitutions, and improvements made within the spirit and principles of this application, fall within the scope of protection claimed by the present invention.

Claims

1. A self-compensating power distribution device, characterized in that, include: Distribution plate (2), multiple connecting keys (5), an annular connecting plate (6), multiple spring devices and an annular spring mounting base (10); The distribution plate (2) is a horizontal hollow cylindrical structure. Multiple symmetrical key mounting slots (2-2) and multiple symmetrical bosses (2-1) are uniformly arranged along the circumference of the outer circumference of the distribution plate (2). The upper width of the key (5) is greater than the groove width of the key mounting slot (2-1), and the lower width is not greater than the groove width of the key mounting slot (2-2). The lower part of the key (5) is inserted into the key mounting slot (2-2). Bolts (3) penetrate the lower part of the connecting plate (6) and the key (5), and are tightened and fixed on the left side of the key (5) via self-locking nuts (4). The left side of the connecting plate (6) abuts against the right side wall of the key mounting slot (2-2). The right side wall of the boss (2-1) abuts against the left side of the connecting plate (6). The left side of the distribution plate (2) is provided with a plurality of oil distribution holes evenly distributed along the circumference, and the connecting key mounting groove (2-2) and the boss (2-1) are both located on the radial outer side of the oil distribution holes; The spring device includes a pressing piston (7), a pressing spring (8), and a spring seat (9) connected in sequence. The spring device is installed in the mounting hole of the spring mounting seat (10). The left side of the pressing piston (7) is in contact with the right side of the connecting plate (6). The connecting plate (6) and the spring mounting seat (10) are fixed horizontally by a plurality of pins (14). There are a plurality of symmetrical spring devices.

2. The self-compensating distribution device according to claim 1, characterized in that, The spring device has at least two symmetrical springs located on the right side of the connecting plate (6) that is in contact with the connecting key (5) or the boss.

3. The self-compensating distribution device according to claim 1, characterized in that, The bolt (3) passes through the countersunk hole of the connecting plate (6) and is connected to the lower part of the connecting key (5).

4. The self-compensating distribution device according to claim 1, characterized in that, The left side of the pin (14) consists of a connecting plate (6) and a boss (2-1).

5. A self-compensating distribution device according to claim 1, characterized in that, The outer edges of the key mounting groove and the boss are on the same circumference.

6. A shell-rotating internal curve hydraulic motor equipped with the self-compensating flow distribution device according to any one of claims 1-5, characterized in that, Also includes: Housing, cylinder block and oiler (1); The distribution plate (2) of the self-compensating distribution device is sleeved on the oiler (1). The left side of the distribution plate (2) is in contact with the right side of the cylinder body. A plunger groove is provided in the cylinder body. A plunger and a roller are provided in the plunger groove. An oil flow channel is provided between the right side of the cylinder body and the plunger groove. The housing contains a rotor. The roller is in contact with the rotor. The supporting bottom surface of the spring mounting seat (10) is fixedly connected to the housing. The oiler (1) has three outer cylindrical surfaces with increasing outer diameters from left to right on its outer periphery, and the distribution plate (2) has three inner cylindrical surfaces with increasing inner diameters from left to right on its inner periphery. The horizontal width of the leftmost outer cylindrical surface is greater than the horizontal width of the leftmost inner cylindrical surface. The outer cylindrical surface and the inner cylindrical surface abut each other, forming an oil passage annular groove A (15) and an oil passage annular groove B (19). The oiler (1) has an A oil passage and a B oil passage. An A oil passage hole (18) is provided in the oiler (1) to connect the A oil passage and the A oil passage ring groove (15), and a B oil passage hole (22) is provided to connect the B oil passage and the B oil passage ring groove (19). An A oil passage hole (17) is provided in the distribution plate (2) to connect the A oil passage ring groove (15) and the A distribution hole (16), and a B oil passage hole (21) is provided to connect the B oil passage ring groove (19) and the B distribution hole (20).

7. A shell-rotating internal curve hydraulic motor according to claim 6, characterized in that, The oiler (1) has cylindrical annular grooves on its outer cylindrical surface, and a first dynamic sealing ring (11), a second dynamic sealing ring (12) and a third dynamic sealing ring (13) are installed in each cylindrical annular groove in sequence.

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