Flow distribution assembly, hydraulic pump and hydraulic motor

Abstract

The utility model relates to hydraulic equipment technical field, specifically disclose a flow distribution assembly, hydraulic pump and hydraulic motor, flow distribution assembly includes cylinder body, flow distribution disc and back end cap, cylinder body forms a plurality of plunger cavities, flow distribution disc is along its circumference interval and is provided with oil suction area and oil discharge area, and oil suction area is equipped with oil suction hole, and oil discharge area is provided with oil discharge hole, and the transition area is arranged between oil suction area and oil discharge area, and the transition area is equipped with damping hole, with the rotation of cylinder body on the end face of flow distribution disc, plunger cavity communicates with oil suction hole, damping hole and oil discharge hole in proper order, and the inside of back end cap forms pressure regulating chamber, and damping hole communicates with pressure regulating chamber. With the rotation of cylinder body, the process of plunger cavity from oil suction hole to oil discharge hole, and the oil in the hydraulic cavity pressurizes the oil in plunger cavity, and reduces the change range of oil pressure in plunger cavity after plunger cavity communicates with oil discharge hole. Simultaneously need not to set up additional parts, reduce the demand of space occupation, be convenient for arrangement.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic equipment technology, and in particular to a flow distribution component, a hydraulic pump, and a hydraulic motor. Background Technology

[0002] As the cylinder block rotates on the distributor plate end face, each plunger on the cylinder block slides in the plunger cavity, thereby achieving oil suction and discharge when the plunger cavity is connected to the oil suction hole or oil discharge hole. During this process, the oil in the plunger cavity will experience sudden pressure changes. For example, when the plunger cavity is connected to the oil suction hole, the negative pressure in the plunger cavity will draw the oil into the plunger cavity, and compress the oil in the plunger cavity as the cylinder block rotates, until the plunger cavity is connected to the oil discharge hole, at which point the oil pressure in the plunger cavity will suddenly increase. During this process, obvious noise and cavitation impacts will be generated.

[0003] In related technologies, an external noise reduction device is typically connected to mitigate noise and cavitation impact caused by sudden changes in oil pressure within the plunger cavity. However, external noise reduction devices increase weight and size, and their irregular shape and often angled installation require more space for placement. Utility Model Content

[0004] The purpose of this invention is to provide a flow distribution component, a hydraulic pump, and a hydraulic motor that can reduce the magnitude of oil pressure changes in the plunger cavity without increasing weight and volume.

[0005] This utility model provides a flow distribution component, including:

[0006] A cylinder block having multiple plunger cavities;

[0007] A distribution plate is provided, and the cylinder body rotates on the end face of the distribution plate. The distribution plate is provided with an oil suction area and an oil discharge area at intervals along its circumference. A transition area is provided between the oil suction area and the oil discharge area. A damping hole is provided in the transition area. As the cylinder body rotates on the end face of the distribution plate, the plunger cavity is connected in sequence to the oil suction hole of the oil suction area, the damping hole and the oil discharge hole of the oil discharge area, and the plunger cavity can be connected to the damping hole and the oil discharge hole at the same time.

[0008] The rear end cover has the distribution plate mounted on it, and a pressure regulating cavity is formed inside the rear end cover. The damping hole is connected to the pressure regulating cavity.

[0009] As a preferred technical solution for the distribution assembly, the damping holes are configured in multiple ways, and the multiple damping holes are spaced apart around the axis of the distribution disk.

[0010] As a preferred technical solution for the flow distribution component, the rear end cover is provided with a plurality of communication holes that communicate with the pressure regulating chamber, and the plurality of communication holes correspond one-to-one with the plurality of damping holes, and the damping holes communicate with the pressure regulating chamber through the communication holes.

[0011] As a preferred technical solution for the distribution component, the damping orifice is a stepped orifice, and the larger end of the stepped orifice is connected to the connecting orifice.

[0012] As a preferred technical solution for the distribution assembly, one end of the oil drain hole is also provided with an unloading groove, which extends toward the oil suction hole. As the cylinder rotates on the end face of the distribution plate, the plunger cavity can simultaneously communicate with the damping hole and the unloading groove.

[0013] As a preferred technical solution for the flow distribution assembly, the distance from the damping orifice to the axis of the flow distribution plate is greater than the distance from the oil drain orifice to the axis of the flow distribution plate.

[0014] As a preferred technical solution for the distribution assembly, the pressure regulating cavity has a large end and a small end, the large end of the pressure regulating cavity is connected to a process hole, and the damping hole is connected to the small end of the pressure regulating cavity.

[0015] As a preferred technical solution for the flow distribution assembly, both the flow distribution plate and the cylinder are configured as two, the two cylinders rotate on the end faces of the two flow distribution plates respectively, the two flow distribution plates are respectively installed at both ends of the rear end cover, the rear end cover is provided with two pressure regulating chambers, and the damping holes on the two flow distribution plates are respectively connected to the two pressure regulating chambers.

[0016] This utility model provides a hydraulic pump, including a housing, multiple plungers, and a flow distribution assembly according to any of the above-mentioned schemes. The rear end cover is fixedly connected to the housing, and the multiple plungers correspond one-to-one with the multiple plunger cavities. The plungers are slidably disposed in the plunger cavities.

[0017] This utility model provides a hydraulic motor, including a housing, multiple plungers, and a flow distribution assembly according to any of the above-mentioned schemes. The rear end cover is fixedly connected to the housing, and the multiple plungers correspond one-to-one with the multiple plunger cavities. The plungers are slidably disposed in the plunger cavities.

[0018] The beneficial effects of this utility model are as follows:

[0019] This invention provides a flow distribution assembly with a damping orifice on the distribution plate and a pressure regulating chamber on the rear end cover, connecting the damping orifice and the pressure regulating chamber. As the cylinder rotates, the plunger chamber moves from the oil suction port to the oil discharge port, connecting with the damping orifice. This allows the oil in the hydraulic chamber on the rear end cover to pressurize the oil in the plunger chamber, thereby reducing the pressure fluctuation in the plunger chamber after it connects with the oil discharge port. Furthermore, it eliminates the need for additional components, reducing weight and volume, minimizing space requirements, and facilitating installation.

[0020] This invention provides a hydraulic pump. By setting the flow distribution component of this invention, the noise and cavitation impact during the operation of the hydraulic pump are reduced, and it is also easy to arrange.

[0021] This invention provides a hydraulic motor. By setting the flow distribution component of this invention, the noise and cavitation impact during the operation of the hydraulic motor are reduced, and it is also easy to arrange. Attached Figure Description

[0022] Figure 1 This is a cross-sectional view of the flow distribution component in an embodiment of this utility model;

[0023] Figure 2 This is a schematic diagram of the structure of the rear end cover in an embodiment of this utility model;

[0024] Figure 3 This is a side view of the rear end cover in an embodiment of the present utility model;

[0025] Figure 4 for Figure 3 Stepped sectional view along the AA direction;

[0026] Figure 5 This is a schematic diagram of the pressure regulating cavity in an embodiment of the present invention;

[0027] Figure 6 This is a schematic diagram of the distribution plate in an embodiment of the present utility model;

[0028] Figure 7 This is a top view of the distribution plate in an embodiment of this utility model;

[0029] Figure 8 for Figure 7 Stepped sectional view along the BB direction.

[0030] In the picture:

[0031] 100. Plunger cavity;

[0032] 1. Distribution plate; 11. Oil suction hole; 12. Oil discharge hole; 121. Unloading groove; 13. Damping hole;

[0033] 2. Rear end cap; 21. Oil inlet; 22. Oil outlet; 23. Connecting hole; 24. Pressure regulating chamber; 241. Process hole;

[0034] 3. Cylinder block; 4. Plunger. Detailed Implementation

[0035] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0036] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions. Moreover, "above," "on top of," and "over" the first feature in relation to the second feature includes the first feature directly above and diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "under," and "below" the first feature in relation to the second feature includes the first feature directly below and diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0037] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0038] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0039] like Figures 1-8 As shown, this utility model relates to a flow distribution assembly, which is applied to a hydraulic pump or hydraulic motor to reduce noise during operation and mitigate cavitation impact caused by sudden pressure changes. In this embodiment, the flow distribution assembly is applied to a piston pump or piston motor. The flow distribution assembly includes a cylinder body 3, a distribution plate 1, and a rear end cover 2. The cylinder body 3 forms multiple piston chambers 100, and pistons 4 are slidably disposed within the piston chambers 100. The cylinder body 3 rotates on the end face of the distribution plate 1, while the pistons 4 reciprocate within the piston chambers 100, increasing or decreasing the volume of the piston chambers 100. The distribution plate 1 has an oil suction area and an oil discharge area spaced apart along its circumference. The oil suction area has an oil suction hole 11, and the oil discharge area has an oil discharge hole 12. A transition area is provided between the oil suction area and the oil discharge area, and a damping hole 13 is provided in the transition area. As the cylinder 3 rotates on the end face of the distribution plate 1, the plunger cavity 100 connects sequentially with the oil suction hole 11, the damping hole 13, and the oil discharge hole 12 to achieve the switching from oil suction to oil discharge. The distribution plate 1 is mounted on the rear end cover 2, which has an oil inlet 21 and an oil outlet 22. The oil suction hole 11 connects to the oil inlet 21, and the oil discharge hole 12 connects to the oil outlet 22. A pressure regulating cavity 24 is formed inside the rear end cover 2, and the damping hole 13 connects to the pressure regulating cavity 24. When the plunger cavity 100 moves to a certain position, the plunger cavity 100 can simultaneously connect to the damping hole 13 and the oil discharge hole 12 to increase the oil pressure in the pressure regulating cavity 24. A damping orifice 13 is provided on the distribution plate 1, and a pressure regulating chamber 24 is provided on the rear end cover 2, so that the damping orifice 13 and the pressure regulating chamber 24 are connected. As the cylinder body 3 rotates, the plunger chamber 100 moves from the oil suction port 11 to the oil discharge port 12, and connects with the damping orifice 13. As a result, the oil in the hydraulic chamber on the rear end cover 2 pressurizes the oil in the plunger chamber 100, thereby reducing the pressure change of the oil in the plunger chamber 100 after it connects with the oil discharge port 12. At the same time, no additional parts are required, so there is no increase in weight and volume, reducing the space occupation requirement and facilitating the layout.

[0040] Furthermore, the damping orifice 13 can be set to one or more. When the damping orifice 13 is set to one, after the plunger cavity 100 is connected to the damping orifice 13, the high-pressure oil in the pressure regulating chamber 24 pre-pressurizes the oil in the plunger cavity 100. As the cylinder body 3 continues to rotate, the plunger cavity 100 is connected to the oil drain hole 12. Since the oil pressure in the plunger cavity 100 is pressurized by the oil in the pressure regulating chamber 24 at this time, the change amplitude of the oil pressure in the plunger cavity 100 is reduced at the moment when the plunger cavity 100 is connected to the oil drain hole 12, thereby reducing noise and mitigating cavitation impact. When there are two or more damping holes 13, the multiple damping holes 13 are arranged around the axis of the distribution plate 1 and spaced apart circumferentially. As the cylinder 3 rotates, the plunger cavity 100 communicates with the multiple damping holes 13 in sequence. Thus, by setting multiple damping holes 13, multi-stage pre-pressurization of the plunger cavity 100 is achieved, reducing the degree of pressure change during the pre-pressurization process and avoiding noise and cavitation caused by large pressure changes during the pre-pressurization process. Due to the size limitation of the distribution plate 1, two damping holes 13 are set in this embodiment. In other embodiments, the number of damping holes 13 can also be changed according to the size of the distribution plate 1 and the adaptability of actual operating conditions, which will not be elaborated here.

[0041] Specifically, such as Figures 1-4 As shown, the rear end cover 2 has multiple connecting holes 23 that communicate with the pressure regulating chamber 24. Each connecting hole 23 corresponds to a damping hole 13, and the damping hole 13 communicates with the pressure regulating chamber 24 through the connecting holes 23. By setting the connecting holes 23, it is easier to arrange sealing elements at the joint position between the damping hole 13 and the connecting hole 23, such as sealing joints or sealing rings, reducing the difficulty of sealing and assembly.

[0042] Specifically, such as Figures 6-8 As shown, the damping orifice 13 is configured as a stepped orifice, with its large end connected to the connecting orifice 23 and its small end connected to the piston chamber, thus facilitating the arrangement of sealing joints and other sealing components between the distribution plate 1 and the rear end cover 2. By configuring the damping orifice 13 as a stepped orifice, the oil is depressurized by the damping orifice 13 during its flow, thereby limiting to some extent the ability of the oil in the pressure regulating chamber 24 to pressurize the oil in the plunger chamber 100.

[0043] Furthermore, such as Figure 6 and Figure 7As shown, the distribution plate 1 is also provided with an unloading groove 121, which is located on the end face of the distribution plate 1 facing the cylinder block 3. The unloading groove 121 is connected to the oil drain hole 12 and extends towards the oil suction hole 11. As the cylinder block 3 rotates on the end face of the distribution plate 1, the plunger cavity 100 can be connected to both the damping hole 13 and the unloading groove 121 simultaneously. When the plunger cavity 100 is connected to both the damping hole 13 and the unloading groove 121 simultaneously, the high-pressure oil in the oil drain hole 12 enters the plunger cavity 100 through the unloading groove 121 and enters the pressure regulating cavity 24 through the damping hole 13 to ensure the oil pressure in the pressure regulating cavity 24, thereby ensuring the ability of the pressure regulating cavity 24 to pre-pressurize the subsequent plunger cavity 100.

[0044] Optionally, the distance from the damping hole 13 to the axis of the distribution plate 1 is greater than the distance from the oil drain hole 12 to the axis of the distribution plate 1, that is, the damping hole 13 is closer to the outer edge of the distribution plate 1, thereby avoiding interference between the arrangement position of the damping hole 13 and the arrangement position of the unloading groove 121, while providing sufficient space for the arrangement of the damping hole 13.

[0045] Specifically, such as Figure 5 As shown, the pressure regulating cavity 24 has a large end and a small end, which are arranged perpendicularly or at an angle. In this embodiment, the small end is perpendicular to the end face of the rear cover 2, and the large end is parallel to the end face of the rear cover 2. The damping hole 13 communicates with the small end of the pressure regulating cavity 24, and the large end of the pressure regulating cavity 24 is connected to a process hole 241. A sealing oil plug is provided in the process hole 241, so that the pressure regulating cavity 24 can only communicate with the outside through the connecting hole 23. This arrangement satisfies the arrangement requirements of the pressure regulating cavity 24 in the thickness direction of the rear cover 2 and provides sufficient space for the pressure regulating cavity 24 to hold the oil. On the other hand, the arrangement of the process hole 241 and the sealing oil plug also reduces the difficulty of manufacturing the rear cover 2.

[0046] As the cylinder block 3 rotates, one of the plunger chambers 100 on the cylinder block 3 is located in the oil suction zone, communicating with the oil suction hole 11 and drawing oil into the plunger chamber 100. Subsequently, the plunger chamber 100 enters the transition zone between the oil suction hole 11 and the oil discharge hole 12, while the plunger 4 compresses the plunger chamber 100, causing the oil pressure within the plunger chamber 100 to increase. The cylinder block 3 continues to rotate, and the plunger chamber 100 communicates with the damping hole 13, allowing the high-pressure oil in the pressure regulating chamber 24 to pre-pressurize the oil in the plunger chamber 100. Then, the plunger chamber 100 simultaneously communicates with the damping hole 13 and the unloading groove 121, allowing the high-pressure oil in the oil discharge zone to pass through the unloading groove 121, the plunger chamber 100, and the damping hole 13 before entering the pressure regulating chamber 24, replenishing the oil pressure within the pressure regulating chamber 24. Finally, the plunger chamber 100 moves to the oil discharge zone, discharging the oil inside. Within the transition zone, the oil pressure in the plunger cavity 100 is increased after pre-pressurization, and then further increased through the unloading groove 121. This reduces the pressure fluctuation when the plunger cavity 100 connects to the discharge zone, lowering noise and mitigating cavitation impact. Simultaneously, the pressure regulating chamber 24 pre-pressurizes the plunger cavity 100, reducing its oil pressure. When the plunger cavity 100 connects to both the damping orifice 13 and the unloading groove 121, the high-pressure oil in the discharge zone enters the pressure regulating chamber 24 after being depressurized by the unloading groove 121 and the damping orifice 13, increasing the oil pressure within the pressure regulating chamber 24 to effectively pre-pressurize the subsequent plunger cavity 100.

[0047] Optionally, in this embodiment, both the distribution plate and the cylinder are configured as two, with the two cylinders rotating on the end faces of the two distribution plates respectively. The two distribution plates 1 are respectively installed at both ends of the rear end cover 2. The rear end cover 2 is provided with two pressure regulating chambers 24, and the damping holes 13 on the two distribution plates 1 are respectively connected to the two pressure regulating chambers 24. This configuration can meet the requirements of a dual-shaft hydraulic pump or a dual-shaft hydraulic motor, further reducing the volume occupation and improving the compactness.

[0048] This utility model provides a hydraulic pump, including a housing and multiple plungers 4, and also includes the flow distribution assembly described in the above embodiment. A rear end cover 2 is fixedly connected to the housing. Each of the multiple plungers 4 corresponds to a single plunger cavity 100, and the plungers 4 are slidably disposed within the plunger cavities 100. By using the flow distribution assembly described in the above embodiment, noise and cavitation impact during hydraulic pump operation are reduced, and the pump is also easier to arrange. Specifically, the hydraulic pump is a plunger pump.

[0049] This utility model provides a hydraulic motor, including a housing and multiple plungers 4, and also includes the flow distribution assembly described in the above embodiment. A rear end cover 2 is fixedly connected to the housing. Each of the multiple plungers 4 corresponds to a single plunger cavity 100, and the plungers 4 are slidably disposed within the plunger cavities 100. By incorporating the flow distribution assembly described in the above embodiment, noise and cavitation impact during hydraulic motor operation are reduced, and the motor is also easier to arrange. Specifically, the hydraulic motor is a plunger motor.

[0050] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A power distribution component, characterized in that, include: The cylinder body (3) has a plurality of plunger cavities (100); The cylinder body (3) rotates on the end face of the distribution plate (1). The distribution plate (1) is provided with an oil suction area and an oil discharge area at intervals along its circumference. A transition area is provided between the oil suction area and the oil discharge area. A damping hole (13) is provided in the transition area. As the cylinder body (3) rotates on the end face of the distribution plate (1), the plunger cavity (100) is connected in sequence to the oil suction hole (11) of the oil suction area, the damping hole (13) and the oil discharge hole (12) of the oil discharge area. The plunger cavity (100) can simultaneously connect to the damping hole (13) and the oil discharge hole (12). The rear end cover (2) is mounted on the distribution plate (1). A pressure regulating cavity (24) is formed inside the rear end cover (2). The damping hole (13) is connected to the pressure regulating cavity (24).

2. The distribution component according to claim 1, characterized in that, The damping holes (13) are configured in multiple ways, and the multiple damping holes (13) are spaced apart around the axis of the distribution plate (1).

3. The distribution component according to claim 2, characterized in that, The rear end cover (2) is provided with a plurality of communication holes (23) that communicate with the pressure regulating chamber (24). The plurality of communication holes (23) correspond one-to-one with the plurality of damping holes (13). The damping holes (13) communicate with the pressure regulating chamber (24) through the communication holes (23).

4. The distribution component according to claim 3, characterized in that, The damping hole (13) is a stepped hole, and the larger end of the stepped hole is connected to the connecting hole (23).

5. The distribution assembly according to claim 1, characterized in that, One end of the oil drain hole is also provided with an unloading groove (121), which extends toward the oil suction hole (11). As the cylinder (3) rotates on the end face of the distribution plate (1), the plunger cavity (100) can communicate with the damping hole (13) and the unloading groove (121) at the same time.

6. The distribution assembly according to claim 5, characterized in that, The distance from the damping hole (13) to the axis of the distribution plate (1) is greater than the distance from the oil drain hole (12) to the axis of the distribution plate (1).

7. The distribution assembly according to claim 1, characterized in that, The pressure regulating cavity (24) has a large end and a small end. The large end of the pressure regulating cavity (24) is connected to a process hole (241), and the damping hole (13) is connected to the small end of the pressure regulating cavity (24).

8. The distribution assembly according to any one of claims 1-7, characterized in that, The distribution plate (1) and the cylinder (3) are both configured as two, and the two cylinders (3) rotate on the end faces of the two distribution plates (1) respectively. The two distribution plates (1) are respectively installed at both ends of the rear end cover (2). The rear end cover (2) is provided with two pressure regulating chambers (24). The damping holes (13) on the two distribution plates (1) are respectively connected to the two pressure regulating chambers (24).

9. A hydraulic pump, comprising a housing and a plurality of plungers (4), characterized in that, It also includes the flow distribution assembly according to any one of claims 1-8, wherein the rear end cover (2) is fixedly connected to the housing, and the plurality of plungers (4) correspond one-to-one with the plurality of plunger cavities (100), and the plungers (4) are slidably disposed in the plunger cavities (100).

10. A hydraulic motor, comprising a housing and a plurality of plungers (4), characterized in that, It also includes the flow distribution assembly according to any one of claims 1-8, wherein the rear end cover (2) is fixedly connected to the housing, and the plurality of plungers (4) correspond one-to-one with the plurality of plunger cavities (100), and the plungers (4) are slidably disposed in the plunger cavities (100).

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