Symmetrically-arranged axial plunger pump cylinder body end face supporting structure
By setting up spherical small oil grooves and triangular oil grooves on the oil distribution plate of the axial plunger pump to form an appropriate oil film, the problem that the contact end surface support structure of the cylinder block and the oil distribution plate in the prior art cannot form an oil film, and better fluid lubrication and higher pump performance are achieved.
Patent Information
- Application Number
- CN202421739997.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-23
- Publication Date
- 2025-05-30
- Estimated Expiration
- 2034-07-23
AI Technical Summary
The end surface support structure in which the cylinder block and the oil distribution plate contacts the cylinder block of the existing axial plunger pump cannot form an appropriate oil film under high speed and high pressure, resulting in poor fluid lubrication, high friction power loss and noise, which in turn affects the working performance and life of the pump.
The axial plunger pump cylinder block end surface support structure is adopted with a symmetrical arrangement. By setting a spherical small oil groove on the sealing support surface of the oil distribution plate and a triangular oil groove on the floating support surface of the oil distribution plate, an appropriate oil film is formed to balance the axial load and prevent the cylinder from capsizing.
Under the high-speed and high-pressure conditions of the axial plunger pump, the oil film on the contact end surface of the cylinder block and the distribution disk is improved, the oil film thickness is maintained, the axial load is balanced, friction loss and noise are reduced, and the pump's service performance and working life are improved.
Smart Images
Figure CN222924557U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of hydraulic transmission technology, and particularly relates to an end face support structure of a symmetrically arranged axial piston pump cylinder block. Background Technique
[0002] Because piston pumps can operate at high speeds and high pressures, they are widely used in industrial and engineering machinery. They convert the mechanical energy input by an electric motor or a prime mover into hydraulic energy output. As a front-end energy conversion device, the performance of a piston pump plays a key role in the entire fluid control system.
[0003] Generally, in an axial piston pump, the end face support structure where the cylinder block contacts the valve plate not only needs to make the cylinder block slide at high speed with the valve plate, but also needs to bear the large and periodically changing axial load transmitted by the piston when the cylinder block is under pressure. At present, most of the end face support structures where the cylinder block and the valve plate of an axial piston pump contact generally adopt the design method of residual clamping force. In order to achieve the seal at the end face support structure, this method usually makes the residual clamping force relatively large. Also, because the variation range of the axial load is relatively large, and at high speeds or high pressures, the cylinder block will be significantly pressed towards the oil discharge side. Therefore, an appropriate oil film cannot be formed between the end face support structures where the cylinder block and the valve plate contact, and fluid lubrication cannot be guaranteed, resulting in semi-dry friction or dry friction, leading to large friction power losses and noise in the entire axial piston pump, and thus low mechanical efficiency, as well as increased oil temperature and wear, seriously affecting the working performance and service life of the piston pump. Summary of the Utility Model
[0004] The technical problem to be solved by the utility model is to provide an end face support structure of a symmetrically arranged axial piston pump cylinder block for the deficiencies in the above-mentioned prior art.
[0005] To solve the above technical problem, the technical solution adopted by the utility model is: an end face support structure of a symmetrically arranged axial piston pump cylinder block, including a transmission shaft. On one side of the transmission shaft, there is a cylinder block one. On one side of the cylinder block one, there is a valve plate one. On the other side of the transmission shaft, there is a cylinder block two. On one side of the cylinder block two, there is a valve plate two. On one side of the cylinder block one and the cylinder block two, there are a valve plate sealing support surface and a valve plate floating support surface. A spherical small oil groove is arranged on the valve plate sealing support surface, and a triangular oil groove is arranged on the valve plate floating support surface.
[0006] Preferably, the cylinder block one and the cylinder block two are installed on both sides of the transmission shaft.
[0007] Preferably, the valve plate one is installed on the other side of the cylinder block one, and the valve plate two is installed on the other side of the cylinder block two.
[0008] Preferably, the oil distribution disc sealing support surface and the oil distribution disc floating support surface are arranged on the side of cylinder block 1 and cylinder block 2 away from the transmission shaft.
[0009] Preferably, the spherical small oil groove is arranged on the oil distribution disc sealing support surface
[0010] Preferably, the triangular oil groove is arranged on the oil distribution disc floating support surface.
[0011] Adopting the above technical solutions, the present utility model can bring the following beneficial effects:
[0012] 1. For the end face support structure of the symmetrically arranged axial piston pump cylinder block, under the high-speed and high-pressure working conditions of the axial piston pump, it can not only improve the oil film on the contact end face between the cylinder block and the oil distribution disc and maintain an oil film thickness of a certain order of magnitude, but also can well balance the overturning moment generated by the axial load on the high-pressure side of the cylinder block and avoid the tendency of the cylinder block to overturn.
[0013] 2. For the end face support structure of the symmetrically arranged axial piston pump cylinder block, the suction and discharge oil plungers of the hydraulic pump rotor and the cylinder block are symmetrically arranged on both sides. The designed structure is compact. Compared with the traditional axial piston symmetric hydraulic pump, the axial distance is reduced by more than 70%, and the rotor design structure is relatively simple. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 is a schematic structural diagram of the present utility model;
[0015] Figure 2 is a schematic structural diagram of cylinder block 1 of the present utility model;
[0016] Figure 3 is a schematic structural diagram of the present utility model with a spherical small oil groove and a triangular oil groove;
[0017] Figure 4 is a schematic structural diagram of the oil distribution disc sealing support surface of the present utility model.
[0018] In the figure: 100, transmission shaft; 1011, cylinder block 1; 1012, cylinder block 2; 1021, oil distribution disc 1; 1022, oil distribution disc 2; 2, oil distribution disc sealing support surface; 21, spherical small oil groove; 3, oil distribution disc floating support surface; 31, triangular oil groove. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0019] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.
[0020] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.
[0021] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", "setting" should be understood in a broad sense. For example, it can be fixedly connected and set, or detachably connected and set, or integrally connected and set. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0022] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, the meaning of "several" is two or more unless otherwise clearly and specifically defined.
[0023] Please refer to Figures 1-4 , an embodiment of the present utility model is: a symmetrically arranged axial piston pump cylinder block end face support structure, including a transmission shaft 100. On one side of the transmission shaft 100, there is a cylinder block one 1011. On one side of the cylinder block one 1011, there is a distributor plate one 1021. On the other side of the transmission shaft 100, there is a cylinder block two 1012. On one side of the cylinder block two 1012, there is a distributor plate two 1022. On one side of the cylinder block one 1011 and the cylinder block two 1012, there are a distributor plate sealing support surface 2 and a distributor plate floating support surface 3. On the distributor plate sealing support surface 2, there is a spherical small oil groove 21. On the distributor plate floating support surface 3, there is a triangular oil groove 31. The cylinder block one 1011 and the cylinder block two 1012 are installed on both sides of the transmission shaft 100. The distributor plate one 1021 is installed on the other side of the cylinder block one 1011. The distributor plate two 1022 is installed on the other side of the cylinder block two 1012. The distributor plate sealing support surface 2 and the distributor plate floating support surface 3 are opened on the side of the cylinder block one 1011 and the cylinder block two 1012 away from the transmission shaft 100. The spherical small oil groove 21 is opened on the distributor plate sealing support surface 2. The triangular oil groove 31 is opened on the distributor plate floating support surface 3.
[0024] Working principle: A number of spherical small oil grooves 21 are evenly arranged on the oil distribution disc sealing support surface 2. When the axial piston pump rotor rotates at high speed and high pressure, these spherical small oil grooves 21 increase the oil storage amount of the static pressure support surface between the cylinder block and the oil distribution disc, so that an appropriate oil film can always be formed between the end face support structures in contact with the cylinder block and the oil distribution disc. Furthermore, fluid lubrication is ensured, and the friction loss and noise of the piston pump are greatly improved. The floating support surface 3 of the oil distribution disc is machined in the outer diffusion radial region of the cylinder block - 1011 and the oil distribution disc sealing support surface 2. The floating support surface 3 of the oil distribution disc is evenly distributed in the radial direction and has a small contact surface with the oil distribution disc - 1021. Triangular oil grooves 31 are machined on its contact surface. When the axial piston pump operates at high speed and high pressure, the floating support surface 3 of the oil distribution disc can effectively avoid the tendency of the overall overturning of the cylinder block. At the same time, it also reduces the friction loss and improves the service performance and working life of the axial piston pump. The spherical small oil grooves 21 and the triangular oil grooves 31 can be formed by laser processing after the overall finish machining, and do not affect the overall dimensions and accuracy.
[0025] The present utility model provides a cylinder block end face support structure with a symmetrical arrangement for an axial piston pump. There are many methods and ways to specifically implement this technical solution. The above description is only the preferred embodiment of the present utility model. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present utility model, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present utility model. Each component not clearly defined in this embodiment can be realized by the prior art.
Claims
1. A symmetrically arranged axial piston pump cylinder end surface support structure, comprising a transmission shaft (100), characterized in that: One side of the transmission shaft (100) is provided with a cylinder block 1 (1011), one side of the cylinder block 1 (1011) is provided with an oil distribution plate 1 (1021), and the other side of the transmission shaft (100) is provided with a cylinder block 2 (1012), one side of the cylinder block 2 (1012) is provided with an oil distribution plate 2 (1022), one side of the cylinder block 1 (1011) and the cylinder block 2 (1012) is provided with an oil distribution plate sealing support surface (2) and an oil distribution plate floating support surface (3), a spherical small oil groove (21) is provided on the oil distribution plate sealing support surface (2), and a triangular oil groove (31) is provided on the oil distribution plate floating support surface (3).
2. A symmetrically arranged axial piston pump cylinder end surface support structure according to claim 1, characterized in that: The cylinder body 1 (1011) and the cylinder body 2 (1012) are installed on both sides of the transmission shaft (100).
3. The symmetrically arranged axial piston pump cylinder end surface support structure according to claim 1, characterized in that: The oil distribution plate 1 (1021) is installed on the other side of the cylinder body 1 (1011), and the oil distribution plate 2 (1022) is installed on the other side of the cylinder body 2 (1012).
4. The symmetrically arranged axial piston pump cylinder end surface support structure according to claim 1, characterized in that: The oil distribution plate sealing support surface (2) and the oil distribution plate floating support surface (3) are arranged on one side of the cylinder body 1 (1011) and the other side of the cylinder body 2 (1012) away from the transmission shaft (100).
5. The symmetrically arranged axial piston pump cylinder end surface support structure according to claim 1, characterized in that: The spherical small oil groove (21) is provided on the sealing support surface (2) of the oil distribution plate.
6. The symmetrically arranged axial piston pump cylinder end surface support structure according to claim 1, characterized in that: The triangular oil groove (31) is formed on the floating support surface (3) of the oil distribution plate.