Low-speed large-flow plunger pump applied to hydraulic steering engine

Abstract

The utility model discloses a low-speed large-flow plunger pump applied to a hydraulic steering engine, and belongs to the technical field of plunger pumps. The low-speed and large-flow plunger pump applied to the hydraulic steering engine comprises a pump body, a driving assembly fixedly installed at the top of the pump body, transmission assemblies symmetrically arranged on the two sides of the pump body and movably connected with the driving assembly, and a supporting base in sliding connection with the transmission assemblies. An X-shaped confluence channel is arranged in the center of the interior of the pump body, the center of the confluence channel is connected with a liquid inlet channel and a liquid outlet channel, and flow stop valves are arranged in the center of the confluence channel, the liquid inlet channel and the liquid outlet channel. According to the low-speed and large-flow plunger pump applied to the hydraulic steering engine, pumping-in and pumping-out of hydraulic oil are achieved through the multiple plungers, the plunger pump works on the two sides at the same time in the using process, and the low-speed and large-flow plunger pump has the advantages of being low in speed and large in displacement, so that the actual using requirement of the hydraulic steering engine can be met, friction movement is improved into rolling movement, and the service life of a transmission assembly is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of piston pump technology, specifically a low-speed, high-flow piston pump used in hydraulic steering gears. Background Technology

[0002] A hydraulic steering gear is a device that uses hydraulic oil as its working medium to turn and maintain the rudder position of a ship. Hydraulic steering gears typically use an electric motor to drive an oil pump, hence they are also called electro-hydraulic steering gears. Currently, hydraulic steering gears usually use a low-speed, high-flow hydraulic pump to achieve their functions. Achieving a large displacement of the pump under low-speed conditions using conventional hydraulic pumps is impractical, often resulting in a very large pump size.

[0003] Chinese utility model patent application number 2021221456560 discloses an axial piston pump. This pump utilizes the rotation of a turntable, where its inclined surface drives a push plate to oscillate back and forth, thereby driving the piston rod to reciprocate and pump fluid. However, the pistons in this axial piston pump are arranged perpendicularly to the pump head, limiting the number of pistons that can be installed, resulting in a low flow rate that cannot meet the actual needs of hydraulic servo motors. Furthermore, during rotation, the turntable experiences full-surface friction with the push plate, leading to significant kinetic energy loss and poor pump performance. Utility Model Content

[0004] This invention provides a low-speed, high-flow-rate piston pump for hydraulic steering gear, aiming to solve the problems mentioned in the background art, such as the limited number of pistons that can be installed, resulting in low flow rates that cannot meet the actual needs of hydraulic steering gear. Furthermore, during the rotation of the turntable, the contact surface with the pushing surface experiences full-surface friction, leading to significant kinetic energy loss and poor performance of the piston pump.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a low-speed, high-flow-rate piston pump for a hydraulic servo motor, comprising a pump body, a drive assembly fixedly mounted on the top of the pump body, a transmission assembly symmetrically arranged on both sides of the pump body and movably connected to the drive assembly, and a support base fixedly connected to both sides of the bottom of the pump body and slidably connected to the transmission assembly; the drive assembly includes a servo motor fixedly mounted on the pump body, a drive gear fixedly mounted on the output shaft of the servo motor, brackets fixedly mounted on both sides of the top of the pump body, a rotating shaft rotatably connected between the two brackets, a driven gear fixedly mounted in the middle of the rotating shaft and meshing with the drive gear, and a fixed... The crankshaft is fixedly installed at both ends of the rotating shaft; the transmission assembly includes a wedge block assembly disposed between the support base and the pump body, a plunger rod with a roller rotatably connected to one end and a plunger block fixedly connected to the other end, a plunger cavity opened inside the pump body and adapted to the plunger rod, a first spring disposed between two collinear plunger rods, and a connecting rod whose lower end is movably connected to the top of the wedge block assembly and whose upper end is rotatably connected to the crankshaft through a rotating sleeve; the pump body has an X-shaped confluence channel in the center, the four ends of the confluence channel are respectively connected to the plunger cavity, the center of the confluence channel is respectively connected to an inlet channel and an outlet channel, and the center of the confluence channel, the inlet channel and the outlet channel are all provided with check valves.

[0006] During operation, the drive assembly drives the transmission assembly. The transmission assembly, through the wedge block group, drives the two sets of plunger rods on the front side to reciprocate, thereby causing the plunger blocks to pump the hydraulic oil in the plunger chamber out of the pump body through the manifold and outlet channels. Simultaneously, the two sets of plunger rods on the rear side reciprocate, thereby driving the hydraulic oil outside the pump body to be pumped into the plunger chamber through the manifold and inlet channels. The first spring resets the plunger blocks and plunger rods during this process. By incorporating multiple flow-stop valves, backflow of hydraulic oil during the pumping process can be prevented. By using multiple plungers to pump in and out the hydraulic oil, the pumping flow rate of the pump body is increased, thus meeting the actual usage requirements of the hydraulic servo motor. The frictional motion between the turntable and the push surface is improved to the rolling motion between the rollers and the wedge block group, thereby extending the service life of the transmission assembly.

[0007] Preferably, the wedge block assembly has a first inclined surface and a second inclined surface on the side near the pump body, the first inclined surface corresponding to the two plunger rods located on the front side, and the second inclined surface corresponding to the two plunger rods located on the rear side.

[0008] Preferably, a track groove adapted to the roller is fixedly installed on both the first inclined surface and the second inclined surface.

[0009] Preferably, the flow-stopping valve includes a flow-stopping cavity, a second spring fixedly connected to one side of the flow-stopping cavity, and a flow-stopping ball fixedly connected to the end of the second spring, wherein the second spring is a conical spring.

[0010] Preferably, the confluence channel includes two symmetrically arranged suction chambers and discharge chambers.

[0011] Preferably, the support base has a rectangular opening, a guide rod is fixedly installed in the rectangular opening, a slider that is slidably connected to the guide rod is fixedly connected to the side of the wedge block assembly away from the pump body, and a third spring is provided on the inner bottom of the slider and the rectangular opening.

[0012] This low-speed, high-flow-rate plunger pump, used in hydraulic servo motors, features a simple structure and ease of use. A drive assembly powers a transmission assembly, which in turn drives two sets of plunger rods on the front side via a wedge block assembly. This movement pumps hydraulic oil from the plunger chamber through a manifold and outlet channel. Simultaneously, the two sets of plunger rods on the rear side reciprocate, pumping hydraulic oil from outside the pump body into the plunger chamber through a manifold and inlet channel. Multiple check valves prevent backflow of hydraulic oil during pumping. The pumping operation utilizes multiple plungers, allowing for simultaneous operation on both sides, resulting in a low-speed, high-volume pump that meets the practical needs of hydraulic servo motors. The frictional motion between the turntable and the push surface is replaced with the rolling motion of rollers and wedge blocks, extending the service life of the transmission assembly. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of a low-speed, high-flow-rate piston pump used in hydraulic steering gear.

[0014] Figure 2 This is a schematic cross-sectional view along the AA direction of a low-speed, high-flow piston pump used in hydraulic steering gear.

[0015] Figure 3 This is an enlarged structural diagram of point C in a low-speed, high-flow piston pump used in hydraulic steering gear.

[0016] Figure 4 This is a schematic cross-sectional view along the BB direction of a low-speed, high-flow piston pump used in hydraulic steering gear.

[0017] In the picture:

[0018] 1. Pump body;

[0019] 2. Drive assembly; 21. Servo motor; 22. Drive gear; 23. Bracket; 24. Shaft; 25. Driven gear; 26. Crankshaft;

[0020] 3. Transmission assembly; 31. Wedge block assembly; 32. Piston rod; 33. Piston cavity; 34. Spring; 35. Connecting rod;

[0021] 311. First inclined plane; 312. Second inclined plane; 313. Track groove; 321. Roller; 322. Plunger block;

[0022] 4. Support base; 41. Rectangular opening; 42. Guide rod; 43. Slider;

[0023] 5. Manifold; 51. Suction chamber; 52. Drainage chamber;

[0024] 6. Liquid inlet channel;

[0025] 7. Liquid outlet channel;

[0026] 8. Flow stop valve; 81. Flow stop chamber; 82. Second spring; 83. Flow stop ball. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] This embodiment provides a low-speed, high-flow-rate piston pump for use in hydraulic steering gears, such as... Figures 1 to 4As shown, the low-speed, high-flow-rate piston pump used in a hydraulic servo motor includes a pump body 1, a drive assembly 2 fixedly mounted on the top of the pump body 1, a transmission assembly 3 symmetrically arranged on both sides of the pump body 1 and movably connected to the drive assembly 2, and a support base 4 fixedly connected to both sides of the bottom of the pump body 1 and slidably connected to the transmission assembly 3. The drive assembly 2 includes a servo motor 21 fixedly mounted on the pump body 1, a drive gear 22 fixedly mounted on the output shaft of the servo motor 21, brackets 23 fixedly mounted on both sides of the top of the pump body 1, a rotating shaft 24 rotatably connected between the two brackets 23, a driven gear 25 fixedly mounted in the middle of the rotating shaft 24 and meshing with the drive gear 22, and a crankshaft 26 fixedly mounted at both ends of the rotating shaft 24. The transmission assembly 3 includes... The pump body 1 is provided with a wedge block assembly 31 between the support base 4 and the pump body 1, a plunger rod 32 with a roller 321 rotatably connected to one end and a plunger block 322 fixedly connected to the other end, a plunger cavity 33 opened inside the pump body 1 and adapted to the plunger rod 32, a first spring 34 disposed between two collinear plunger rods 32, and a connecting rod 35 whose lower end is movably connected to the top of the wedge block assembly 31 and whose upper end is rotatably connected to the crankshaft 26 through a rotating sleeve; the pump body 1 is provided with an X-shaped confluence channel 5 in the center, the four ends of the confluence channel 5 are respectively connected to the plunger cavity 33, the center of the confluence channel 5 is respectively connected to the inlet channel 6 and the outlet channel 7, and the center of the confluence channel 5, the inlet channel 6 and the outlet channel 7 are all provided with a check valve 8.

[0029] During operation, the drive assembly 2 drives the transmission assembly 3. The transmission assembly 3, through the wedge block group 31, drives the two sets of plunger rods 32 on the front side to reciprocate, thereby driving the plunger blocks 322 to pump the hydraulic oil in the plunger cavity 33 out of the pump body 1 through the manifold 5 and the outlet channel 7. At the same time, through the reciprocating movement of the two sets of plunger rods 32 on the rear side, the hydraulic oil in the pump body 1 is pumped into the plunger cavity 33 through the manifold 5 and the inlet channel 6. During this process, the first spring 34 resets the plunger blocks 322 and the plunger rods 32. By setting multiple flow-stopping valves 8, backflow of hydraulic oil can be prevented during the pumping process. By setting multiple plungers to achieve the pumping of hydraulic oil, both sides work simultaneously during use, which has the advantages of low speed and large displacement, thus meeting the actual use requirements of hydraulic servo motors. The frictional motion between the turntable and the push surface is improved to the rolling motion between the roller 321 and the wedge block group 31, thereby extending the service life of the transmission assembly 3.

[0030] In one embodiment, the wedge block assembly 31 is provided with a first inclined surface 311 and a second inclined surface 312 on the side near the pump body 1. The first inclined surface 311 corresponds to the two plunger rods 32 located on the front side, and the second inclined surface 312 corresponds to the two plunger rods 32 located on the rear side.

[0031] In this embodiment, refer to Figure 1 , Figure 3 and Figure 4 When the first inclined surface 311 and the second inclined surface 312 contact and move with the front and rear sets of plunger rods 32 respectively, oil pumping and oil discharge inside the plunger cavity 33 are realized.

[0032] In one embodiment, a track groove 313 adapted to the roller 321 is fixedly installed on both the first inclined surface 311 and the second inclined surface 312.

[0033] In this embodiment, refer to Figure 1 The rolling motion of the roller 321 and the track groove 313 greatly reduces the damage caused by friction, thereby extending the service life of the transmission component 3.

[0034] In one embodiment, the manifold 5 includes two symmetrically arranged suction chambers 51 and discharge chambers 52.

[0035] In this embodiment, refer to Figure 2 During operation, the two suction chambers 51 are responsible for drawing the hydraulic oil that enters through the inlet channel 6 into the two plunger chambers 33 on the rear side, and the discharge chamber 52 is responsible for discharging the hydraulic oil that exits from the two plunger chambers 33 on the front side into the outlet channel 7.

[0036] In one embodiment, the flow-stopping valve 8 includes a flow-stopping cavity 81, a second spring 82 fixedly connected to one side of the flow-stopping cavity 81, and a flow-stopping ball 83 fixedly connected to the end of the second spring 82, wherein the second spring 82 is a conical spring.

[0037] In this embodiment, refer to Figure 2 When the two plunger blocks 322 on the rear side approach each other, the external hydraulic oil squeezes the stop ball 83, causing the stop ball 83 to separate from the end of the inlet channel 6. At the same time, the second spring 82 begins to contract, allowing hydraulic oil to be drawn in from the inlet channel 6. When the two plunger blocks 322 on the front side approach each other, the hydraulic oil in the drain chamber 52 squeezes the stop ball 83, causing the stop ball 83 to separate from one end of the outlet channel 7. At the same time, the second spring 82 begins to contract, allowing hydraulic oil to be discharged from the outlet channel 7. Meanwhile, the stop valve 8 located in the center of the manifold 5 has the same working principle, enabling the hydraulic oil to flow in one direction from the inlet channel 6 to the manifold 5 and the outlet channel 7, thereby realizing the oil extraction and oil discharge operations.

[0038] In one embodiment, the support base 4 has a rectangular opening 41, a guide rod 42 is fixedly installed in the rectangular opening 41, and a slider 43 that is slidably connected to the guide rod 42 is fixedly connected to the side of the wedge block assembly 31 away from the pump body 1. A third spring 44 is provided on the bottom inner side of the slider 43 and the rectangular opening 41.

[0039] In this embodiment, refer to Figure 1 During the reciprocating motion of the wedge block assembly 31, the third spring 44 can be used to assist the wedge block assembly 31 in resetting through the sliding cooperation between the slider 43 and the guide rod 42, thereby ensuring that the movement process of the wedge block assembly 31 is more stable.

[0040] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A low-speed, high-flow piston pump for use in hydraulic steering gear, comprising a pump body (1), a drive assembly (2) fixedly mounted on the top of the pump body (1), a transmission assembly (3) symmetrically arranged on both sides of the pump body (1) and movably connected to the drive assembly (2), and a support seat (4) fixedly connected to both sides of the bottom of the pump body (1) and slidably connected to the transmission assembly (3). Its features are: The drive assembly (2) includes a servo motor (21) fixedly mounted on the pump body (1), a drive gear (22) fixedly mounted on the output shaft of the servo motor (21), brackets (23) fixedly mounted on both sides of the top of the pump body (1), a rotating shaft (24) rotatably connected between the two brackets (23), a driven gear (25) fixedly mounted in the middle of the rotating shaft (24) and meshing with the drive gear (22), and crankshafts (26) fixedly mounted at both ends of the rotating shaft (24). The transmission assembly (3) includes a wedge block group (31) disposed between the support base (4) and the pump body (1), a plunger rod (32) with a roller (321) rotatably connected at one end and a plunger block (322) fixedly connected at the other end, a plunger cavity (33) opened inside the pump body (1) and adapted to the plunger rod (32), a first spring (34) disposed between two collinear plunger rods (32), and a connecting rod (35) whose lower end is movably connected to the top of the wedge block group (31) and whose upper end is rotatably connected to the crankshaft (26) through a rotating sleeve. The pump body (1) has an X-shaped manifold (5) in the center. The four ends of the manifold (5) are connected to the plunger cavity (33). The center of the manifold (5) is connected to the inlet channel (6) and the outlet channel (7). The center of the manifold (5), the inlet channel (6) and the outlet channel (7) are all equipped with a stop valve (8).

2. The low-speed, high-flow-rate piston pump for hydraulic steering gear according to claim 1, characterized in that: The wedge block group (31) is provided with a first inclined surface (311) and a second inclined surface (312) on the side near the pump body (1). The first inclined surface (311) corresponds to the two plunger rods (32) located on the front side, and the second inclined surface (312) corresponds to the two plunger rods (32) located on the rear side.

3. The low-speed, high-flow-rate piston pump for hydraulic steering gear according to claim 2, characterized in that: The first inclined surface (311) and the second inclined surface (312) are both fixedly installed with track grooves (313) that are compatible with the roller (321).

4. The low-speed, high-flow-rate piston pump for hydraulic steering gear according to claim 1, characterized in that: The flow-stopping valve (8) includes a flow-stopping cavity (81), a second spring (82) fixedly connected to one side of the flow-stopping cavity (81), and a flow-stopping ball (83) fixedly connected to the end of the second spring (82). The second spring (82) is a conical spring.

5. The low-speed, high-flow-rate piston pump for hydraulic steering gear according to claim 1, characterized in that: The confluence channel (5) includes two symmetrically arranged suction chambers (51) and discharge chambers (52).

6. The low-speed, high-flow-rate piston pump for hydraulic steering gear according to claim 1, characterized in that: The support base (4) has a rectangular opening (41), and a guide rod (42) is fixedly installed in the rectangular opening (41). The wedge block group (31) is fixedly connected to a slider (43) that is slidably connected to the guide rod (42) on the side away from the pump body (1). A third spring (44) is provided on the bottom inner side of the slider (43) and the rectangular opening (41).

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