Variable displacement axial plunger pump for turnout

Abstract

The invention relates to a variable displacement axial plunger pump for a turnout, and relates to the technical field of axial plunger pumps, the variable displacement axial plunger pump comprises a pump body, an oil distribution disc, a driving shaft, a swash plate, a driving assembly, a connecting assembly and an adjusting assembly, and the oil distribution disc is fixedly arranged in the pump body; one end of the driving shaft penetrates through the pump body; the swash plate is rotationally connected into the pump body and rotationally connected with the driving shaft. The two ends of the driving assembly are connected with the driving shaft and the swash plate correspondingly and used for adjusting the connecting angle of the swash plate and the driving shaft. The connecting assembly is arranged on the pump body and used for connecting the pump body and the swash plate. The multiple plungers are evenly distributed in the axis direction of the swash plate by a circle, one ends of the plungers are rotationally connected with the swash plate, the plungers are slidably connected with the pump body, and the oil inlet grooves and the oil outlet grooves are located in the rotating paths of the plungers. The adjusting assembly is arranged on the swash plate and used for adjusting the flow of the oil pump. The method has the effect of improving the safety of the turnout.

Description

Technical Field

[0001] The present application relates to the technical field of axial piston pumps, and in particular to a variable displacement axial piston pump for a turnout. Background Art

[0002] The axial piston pump is an inclined plate type axial piston pump that uses an oil distribution plate to distribute oil, a cylinder body to rotate, and a variable head to change its variable speed. The pump adopts the optimal oil film thickness design of hydraulic static balance, so that the cylinder body and the oil distribution plate, the sliding shoe and the variable head are operated under pure liquid friction.

[0003] At present, when a general plunger pump is working, driven by the main shaft, the plunger is forced to reciprocate up and down, so that the cylinder body absorbs and discharges oil through the oil distribution plate to complete the oil pumping task.

[0004] When multiple electric hydraulic switch machines are pulling turnouts for switching, the switching action time of each switch machine is adjusted by changing the displacement of the oil pump, so that the switching time and switching stroke of the switch machines at each traction point are reasonable, and the synchronous switching of the entire set of turnouts is achieved.

[0005] However, when a single displacement oil pump is used, mismatches in switch machine switching time and switching stroke can cause turnout jamming and snaking. Summary of the invention

[0006] In order to improve the safety of turnouts, the present application provides a variable displacement axial piston pump for turnouts.

[0007] The present application provides a variable displacement axial piston pump for a turnout, which adopts the following technical solution: A variable displacement axial piston pump for a turnout, comprising: A pump body, wherein a liquid inlet hole and a liquid outlet hole are formed on the pump body; An oil distribution plate is fixedly arranged in the pump body, and an oil inlet groove and an oil outlet groove are formed on the oil distribution plate, and the oil inlet groove and the oil outlet groove are respectively connected with the liquid inlet hole and the liquid outlet hole; A drive shaft, one end of which is passed through the pump body and extends into the interior of the pump body; A swash plate, rotatably connected within the pump body and rotatably connected to the drive shaft; A driving assembly, two ends of which are respectively connected to the driving shaft and the swash plate, and used to adjust the connection angle between the swash plate and the driving shaft; A connecting assembly, disposed on the pump body and used to connect the pump body and the swash plate; A plurality of plungers are provided, and the plurality of plungers are evenly arranged around the axial direction of the swash plate, one end of the plunger is rotatably connected to the swash plate, and the plunger is slidably connected to the pump body, wherein the oil inlet groove and the oil outlet groove are both located on the rotation path of the plunger; Adjustment components, including: A rotating plate rotatably connected to the pump body; Two connecting rods are provided, the two connecting rods are respectively located on the edge ends of the swash plate, the two ends of the rotating plate are respectively hinged to the two connecting rods, and the connecting rods abut against the swash plate; A push rod, one end of which is slidably disposed on an end of the pump body away from the drive shaft and connected to the swash plate; The non-return portion is arranged on the push rod and is used to prevent the push rod from moving back.

[0008] By adopting the above technical scheme, the driving shaft is driven to rotate, and the driving shaft drives the swash plate to rotate. Under the drive of the swash plate, the plunger makes reciprocating motion in the pump body, thereby realizing the suction and discharge of liquid. The driving component cooperates with the adjusting component, and the push rod is pushed. The push rod drives the rotating plate to rotate, and the rotating plate is tilted, so that the connecting rod moves, so that the two ends of the swash plate are displaced differently, and the inclination angle of the swash plate is changed. The check part prevents the push rod from moving back, thereby changing the stroke of the plunger and affecting the displacement of the oil pump. When multiple electric hydraulic switch machines pull the turnout for conversion, they can achieve synchronous conversion, thereby improving the safety of the turnout.

[0009] Optionally, the adjustment component further includes an audio collector, which is disposed on the pump body and is used to detect the sound waveform when the oil pump is running and determine its state.

[0010] By adopting the above technical solution, the audio collector can collect the sound signals of the oil pump in real time when it is running, and analyze and process these signals through the built-in algorithm to determine the operating status of the oil pump; When an abnormal sound waveform is detected, the audio collector will immediately trigger the early warning system to notify the operator or automatically shut down the machine to avoid equipment damage or safety accidents, thereby shortening troubleshooting time and making it easier to improve maintenance efficiency.

[0011] Optionally, the regulating component further includes two flow sensors, which are respectively fixed on the liquid inlet and the liquid outlet of the pump body, and are used to monitor the flow change of the oil pump.

[0012] By adopting the above technical solution, the flow sensor can monitor the flow changes of the oil pump in real time. The two flow sensors are respectively installed in the liquid inlet and outlet holes of the pump body to ensure that the flow changes of the oil pump when sucking and discharging liquid can be accurately monitored. By analyzing the data of the flow sensor, the operator can accurately adjust the displacement of the oil pump, which can not only improve the operating efficiency of the oil pump, but also reduce energy consumption and wear.

[0013] Optionally, a clearance groove is provided on the push rod, and the non-return portion includes: A spur rack, slidably connected in a give-way groove; A plurality of pressure-bearing springs are provided, and the plurality of pressure-bearing springs are arranged along the length direction of the spur rack, and the two ends of the pressure-bearing springs are respectively fixedly connected to the spur rack and the bottom of the give-way groove; a gear meshing with the spur rack and rotatably connected to the pump body; A ratchet wheel is coaxially connected to the gear and is rotationally connected to the pump body; The ratchet pawl is rotatably connected to the pump body and is engaged with the ratchet wheel.

[0014] By adopting the above technical solution, under the elastic force of the pressure spring, the spur rack is provided with stable support, the push rod is pushed into the pump body, the push rod pushes the connecting rod to rotate, the connecting rod drives the moving rod to move, and the moving rod pushes the swash plate to rotate, thereby adjusting the displacement of the oil pump; At the same time, the spur rack drives the gear to rotate, and the gear drives the ratchet to rotate. Through the elastic force of the connecting spring, it maintains a tight engagement with the ratchet, realizing the one-way transmission of the push rod. When the push rod needs to be pulled out, the spur rack is pressed toward the bottom of the pump body, and the spur rack is separated from the ratchet, releasing the locked state, making it easy to adjust the flow of the oil pump.

[0015] Optionally, the connection component includes: A fixing ring is fixedly mounted on the inner wall of the pump body, wherein the fixing ring is provided with an adjusting groove; A fixed plate, fixedly arranged on a side of the slanted plate away from the driving shaft, with an edge side located in the adjusting groove; A plurality of return springs are provided, and the plurality of return springs are arranged around the axis direction of the fixing ring, and the two ends of the return springs are respectively fixedly connected to the fixing plate and the groove wall of the adjusting groove.

[0016] By adopting the above technical solution, the push rod pushes the connecting rod to rotate, the connecting rod drives the moving rod to move, the moving rod pushes the fixed plate to rotate, and under the elastic force of the return spring, the fixed plate drives the swash plate to change the inclination angle, thereby easily maintaining the stability of the swash plate.

[0017] Optionally, the driving component includes: A rotating ball, fixedly connected to the driving shaft; A plurality of partitions are provided, the plurality of partitions are arranged around the axis direction of the rotating ball, and the partitions are fixed on the rotating ball; The fixed shell is fixed at the center of the slant plate. A plurality of slots are fixed around the inner wall of the fixed shell. The partition is located in the slots and is rotatably connected to the fixed shell.

[0018] By adopting the above technical solution, the driving shaft drives the rotating ball to rotate, and the rotating ball drives the partition to rotate. Through the cooperation of the partition and the fixed shell slot, the rotational motion of the rotating ball can be evenly transmitted to the swash plate, and the swash plate drives the plunger to rotate, so that the plunger can realize the displacement of oil inlet and oil outlet.

[0019] Optionally, one end of the connecting rod close to the swash plate is spherical.

[0020] By adopting the above technical solution, the contact area between the connecting rod and the swash plate can be effectively reduced, and the friction between the two can be reduced, thereby improving the transmission efficiency and reliability.

[0021] Optionally, the audio collector is a microphone array.

[0022] By adopting the above technical solution and using the microphone array as an audio collector, the sound signals of the oil pump during operation can be captured at different positions. This helps to monitor the working status of the oil pump in real time, detect abnormal sounds in time, and improve the accuracy and efficiency of fault diagnosis, thereby ensuring the safe and stable operation of the variable displacement axial piston pump for turnouts.

[0023] Optionally, the flow sensor is an electromagnetic flowmeter.

[0024] By adopting the above technical solution, the design of the flow sensor as an electromagnetic flowmeter can significantly improve the measurement accuracy of the instantaneous flow at the inlet and outlet of the oil pump, which is helpful to monitor the working status of the oil pump in real time and ensure that the action time and stroke of each switch machine are more reasonably matched, thereby effectively avoiding the occurrence of turnout jamming and serpentine action.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: Through the design of the rotating plate and the connecting rod in the adjustment assembly, the connection angle between the swash plate and the drive shaft is adjustable, thereby changing the working stroke of the plunger, effectively solving the problem in the prior art that a single displacement oil pump cannot flexibly adjust the switching time and switching stroke of each switch machine, and avoiding the occurrence of turnout blocking and serpentine action; The audio collector can detect the sound waveform of the oil pump in real time and determine its status, which helps to find and deal with abnormal situations in time and improve the safety and reliability of the system. The flow sensor can monitor the instantaneous flow changes at the inlet and outlet of the oil pump, providing accurate data support for the system and further improving the working accuracy and stability of the pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of an embodiment of the present application; Figure 2 This application embodiment is intended to demonstrate Figure 1Cross-sectional view of the internal structure of the pump body in an inverted state; Figure 3 The embodiment of the present application is intended to show an exploded view of a drive assembly; Figure 4 This is a cross-sectional view of an oil distribution plate intended to be shown in an embodiment of the present application; Figure 5 This is a schematic diagram of the structure of the non-return portion of the embodiment of the present application.

[0027] Description of reference numerals: 1. Pump body; 11. Liquid inlet hole; 12. Liquid outlet hole; 2. Oil distribution plate; 21. Oil inlet groove; 22. Oil outlet groove; 3. Drive shaft; 4. Inclined plate; 5. Plunger; 6. Drive assembly; 61. Rotating ball; 62. Partition plate; 63. Fixed shell; 7. Connecting assembly; 71. Fixed ring; 72. Fixed plate; 73. Return spring; 8. Adjusting assembly; 81. Rotating plate; 82. Connecting rod; 83. Push rod; 831. Make way groove; 84. Audio collector; 85. Flow sensor; 86. Check part; 861. Spur rack; 862. Pressure spring; 863. Gear; 864. Ratchet; 865. Ratchet. DETAILED DESCRIPTION

[0028] The following is combined with Figure 1-5 This application is described in further detail.

[0029] The present application discloses a variable displacement axial piston pump for a turnout. Figure 1 and Figure 2 A variable displacement axial piston pump for a turnout includes a pump body 1, an oil distribution plate 2, a drive shaft 3, a swash plate 4, a plunger 5, a drive assembly 6, a connecting assembly 7 and an adjusting assembly 8. The pump body 1 is provided with a liquid inlet hole 11 and a liquid outlet hole 12; the oil distribution plate 2 is fixed in the pump body 1, and the oil distribution plate 2 is provided with an oil inlet groove 21 and an oil outlet groove 22, and the oil inlet groove 21 and the oil outlet groove 22 are respectively connected with the liquid inlet hole 11 and the liquid outlet hole 12.

[0030] One end of the drive shaft 3 is passed through the pump body 1 and extends into the pump body 1. The swash plate 4 is rotatably connected in the pump body 1 and is rotatably connected to the drive shaft 3. A plurality of plungers 5 are provided, and the plurality of plungers 5 are evenly arranged around the axis direction of the swash plate 4. One end of the plunger 5 is rotatably connected to the swash plate 4, and the plunger 5 is slidably connected to the pump body 1, wherein the oil inlet groove 21 and the oil outlet groove 22 are both located on the rotation path of the plunger 5.

[0031] The two ends of the driving assembly 6 are respectively connected to the driving shaft 3 and the swash plate 4, and are used to adjust the connection angle between the swash plate 4 and the driving shaft 3. The connecting assembly 7 is arranged on the pump body 1, and is used to connect the pump body 1 and the swash plate 4. The adjusting assembly 8 is arranged on the swash plate 4, and is used to adjust the flow rate of the oil pump.

[0032] When in use, with the cooperation of the connecting component 7, the adjusting component 8 first adjusts the inclination angle of the swash plate 4. At the same time, the driving component 6 adjusts the connection angle between the swash plate 4 and the driving shaft 3. Then, the external motor drives the driving shaft 3 to rotate, and the driving shaft 3 drives the driving component 6 to rotate. The driving component 6 drives the swash plate 4 to rotate, and the swash plate 4 drives multiple plungers 5 to rotate, which affects the displacement of the oil pump, so that when multiple electric hydraulic switch machines pull the turnout to switch, they can achieve synchronous conversion, thereby improving the safety of the turnout.

[0033] Reference Figure 2 and Figure 3 The driving assembly 6 includes a rotating ball 61, a partition 62 and a fixed shell 63. The rotating ball 61 is fixedly connected to the driving shaft 3. A plurality of partitions 62 are provided. The plurality of partitions 62 are evenly arranged around the axis direction of the rotating ball 61. The partitions 62 are fixed on the rotating ball 61. The fixed shell 63 is fixed at the center of the swash plate 4. A plurality of slots are fixed around the inner wall of the fixed shell 63. The partitions 62 are located in the slots and are rotatably connected to the fixed shell 63.

[0034] When in use, the driving shaft 3 drives the rotating ball 61 to rotate, and the rotating ball 61 drives the partition 62 to rotate. Through the cooperation of the partition 62 and the slot of the fixed shell 63, the rotational movement of the rotating ball 61 can be evenly transmitted to the swash plate 4, and the swash plate 4 drives the plunger 5 to rotate, so that the plunger 5 can realize the displacement of oil inlet and oil outlet.

[0035] Reference Figure 2 and Figure 4 The connecting assembly 7 includes a fixing ring 71, a fixing plate 72 and a return spring 73. The fixing ring 71 is fixed on the inner wall of the pump body 1 and an adjustment groove is provided on the fixing ring 71. The fixing plate 72 is fixed on the side of the swash plate 4 away from the drive shaft 3, and the edge side is located in the adjustment groove.

[0036] A plurality of return springs 73 are provided, and the plurality of return springs 73 are evenly arranged around the axis direction of the fixing ring 71 , and two ends of the return spring 73 are respectively fixedly connected to the fixing plate 72 and the groove wall of the adjusting groove.

[0037] Reference Figure 2 and Figure 5 The adjusting assembly 8 includes a rotating plate 81, a connecting rod 82, a push rod 83, an audio collector 84, two flow sensors 85 and a check portion 86. The rotating plate 81 is rotatably connected in the pump body 1. Two connecting rods 82 are provided. The two connecting rods 82 are respectively located on the edge ends of the swash plate 4. The end of the connecting rod 82 close to the swash plate 4 is spherical.

[0038] Reference Figure 2 and Figure 5The two ends of the rotating plate 81 are respectively hinged with two connecting rods 82, and the connecting rods 82 abut against the fixed plate 72. One end of the push rod 83 is slidably arranged on the end of the pump body 1 away from the driving shaft 3 and abuts against the connecting rod 82. The push rod 83 is located on one side of the hinge point of the connecting rod 82.

[0039] Reference Figure 1 and Figure 4 The audio collector 84 is arranged on the pump body 1. The audio collector 84 is a microphone array and is used to detect the sound waveform when the oil pump is running and determine its state. Two flow sensors 85 are respectively fixed in the liquid inlet hole 11 and the liquid outlet hole 12 of the pump body 1. The flow sensor 85 is used to monitor the flow change of the oil pump. The flow sensor 85 is an electromagnetic flow meter.

[0040] Reference Figure 2 and Figure 5 The push rod 83 is provided with a clearance groove 831, and the non-return portion 86 includes a spur rack 861, a pressure spring 862, a gear 863, a ratchet 864 and a pawl 865. The spur rack 861 is slidably connected in the clearance groove 831. A plurality of pressure springs 862 are provided, and the plurality of pressure springs 862 are evenly arranged along the length direction of the spur rack 861, and the two ends of the pressure spring 862 are respectively fixedly connected to the spur rack 861 and the bottom of the clearance groove 831.

[0041] The gear 863 is meshed with the spur rack 861 and is rotatably connected to the pump body 1. The ratchet 864 is coaxially fixedly connected to the gear 863 and is rotatably connected to the pump body 1. The ratchet pawl 865 is rotatably connected to the pump body 1 and is clamped with the ratchet 864 via a connecting spring.

[0042] When in use, the flow sensor 85 monitors the flow changes of the oil pump in real time, and the audio collector 84 collects the sound signals when the oil pump is running in real time, and analyzes and processes these signals through the built-in algorithm to determine the operating status of the oil pump.

[0043] The implementation principle of a variable displacement axial piston pump for a turnout in the embodiment of the present application is as follows: the flow sensor 85 monitors the flow change of the oil pump in real time, the audio collector 84 collects the sound signals when the oil pump is running in real time, and analyzes and processes these signals through the built-in algorithm to determine the operating state of the oil pump; Under the elastic force of the pressure spring 862, the spur rack 861 is provided with stable support, and the push rod 83 is pushed into the pump body 1, and the push rod 83 pushes the connecting rod 82 to rotate, and the connecting rod 82 drives the moving rod to move, and the moving rod drives the fixed plate 72 to rotate, and the fixed plate 72 drives the swash plate 4 to rotate. Under the elastic force of the return spring 73, the fixed plate 72 drives the swash plate 4 to change the inclination angle; At the same time, the spur rack 861 drives the gear 863 to rotate, and the gear 863 drives the ratchet 864 to rotate. Through the elastic force of the connecting spring, the gear 863 maintains a tight engagement with the ratchet 864, thereby realizing a one-way transmission of the push rod 83. When the push rod 83 needs to be pulled outward, the spur rack 861 is pressed toward the bottom of the pump body, and the spur rack 861 is separated from the ratchet 864, thereby releasing the locked state. The driving shaft 3 drives the rotating ball 61 to rotate, and the rotating ball 61 drives the partition 62 to rotate. Through the cooperation of the partition 62 and the slot of the fixed shell 63, the rotational movement of the rotating ball 61 can be evenly transmitted to the swash plate 4. The swash plate 4 drives multiple plungers 5 to rotate, which affects the displacement of the oil pump, so that when multiple electric hydraulic switch machines pull the turnout to switch, they can achieve synchronous conversion, thereby improving the safety of the turnout.

[0044] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A variable displacement axial piston pump for a turnout, characterized in that: include: A pump body (1), wherein the pump body (1) is provided with a liquid inlet hole (11) and a liquid outlet hole (12); An oil distribution plate (2) is fixedly mounted in the pump body (1), and an oil inlet groove (21) and an oil outlet groove (22) are formed on the oil distribution plate (2), wherein the oil inlet groove (21) and the oil outlet groove (22) are respectively connected to the liquid inlet hole (11) and the liquid outlet hole (12); A drive shaft (3), one end of which is passed through the pump body (1) and extends into the interior of the pump body (1); a swash plate (4) rotatably connected within the pump body (1) and rotatably connected to the drive shaft (3); A drive assembly (6), the two ends of which are respectively connected to the drive shaft (3) and the swash plate (4), and is used to adjust the connection angle between the swash plate (4) and the drive shaft (3); A connecting assembly (7) is arranged on the pump body (1) and is used to connect the pump body (1) and the swash plate (4); A plurality of plungers (5) are provided, and the plurality of plungers are evenly arranged around the axis direction of the swash plate (4), one end of the plunger (5) is rotatably connected to the swash plate (4), and the plunger (5) is slidably connected to the pump body (1), wherein the oil inlet groove (21) and the oil outlet groove (22) are both located on the rotation path of the plunger (5); The regulating assembly (8) comprises: A rotating plate (81) rotatably connected inside the pump body (1); Two connecting rods (82) are provided, the two connecting rods (82) are respectively located on the edge ends of the swash plate (4), the two ends of the rotating plate (81) are respectively hinged to the two connecting rods (82), and the connecting rods (82) are in contact with the swash plate (4); A push rod (83), one end of which is slidably disposed on an end of the pump body (1) away from the drive shaft (3) and is connected to the swash plate (4); The non-return portion (86) is arranged on the push rod (83) and is used to prevent the push rod (83) from moving back.

2. A variable displacement axial piston pump for a turnout according to claim 1, characterized in that: The regulating component (8) further comprises an audio collector (84), which is arranged on the pump body (1) and is used to detect the sound waveform of the oil pump when it is running and determine its state.

3. A variable displacement axial piston pump for a turnout according to claim 1, characterized in that: The regulating assembly (8) further comprises two flow sensors (85), the two flow sensors (85) being respectively fixed on the liquid inlet (11) and the liquid outlet (12) of the pump body (1), and the flow sensors (85) being used to monitor flow changes of the oil pump.

4. A variable displacement axial piston pump for a turnout according to claim 1, characterized in that: The push rod (83) is provided with a clearance groove (831), and the non-return portion (86) comprises: A spur rack (861) is slidably connected in the clearance groove (831); A plurality of pressure-bearing springs (862) are provided, and the plurality of pressure-bearing springs (862) are arranged along the length direction of the spur rack (861), and two ends of the pressure-bearing springs (862) are respectively fixedly connected to the spur rack (861) and the bottom of the clearance groove (831); A gear (863) meshing with the spur rack (861) and rotatably connected to the pump body (1); A ratchet (864) is coaxially fixedly connected to the gear (863) and is rotationally connected to the pump body (1); The ratchet pawl (865) is rotatably connected to the pump body (1) and is engaged with the ratchet wheel (864).

5. The variable displacement axial piston pump for turnout according to claim 1, characterized in that: The connection component (7) comprises: A fixing ring (71) is fixedly mounted on the inner wall of the pump body (1), wherein an adjustment groove is formed on the fixing ring (71); A fixed plate (72) is fixedly mounted on a side of the swash plate (4) away from the drive shaft (3), and an edge side of the fixed plate is located in the adjustment groove; A plurality of return springs (73) are provided, and the plurality of return springs (73) are arranged around the axis direction of the fixed ring (71), and two ends of the return springs (73) are respectively fixedly connected to the fixed disk (72) and the groove wall of the adjustment groove.

6. A variable displacement axial piston pump for a turnout according to claim 1, characterized in that: The driving component (6) comprises: A rotating ball (61) fixedly connected to the driving shaft (3); A plurality of partition plates (62) are provided, and the plurality of partition plates (62) are arranged around the axis direction of the rotating ball (61), and the partition plates (62) are fixed on the rotating ball (61); A fixed shell (63) is fixedly arranged at the center of the swash plate (4), and a plurality of slots are fixedly arranged around the inner wall of the fixed shell (63). The partition plate (62) is located in the slots and is rotatably connected to the fixed shell (63).

7. A variable displacement axial piston pump for a turnout according to claim 1, characterized in that: One end of the connecting rod (82) close to the swash plate (4) is spherical.

8. The variable displacement axial piston pump for a turnout according to claim 2, characterized in that: The audio collector (84) is a microphone array.

9. The variable displacement axial piston pump for a turnout according to claim 3, characterized in that: The flow sensor (85) is an electromagnetic flow meter.

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