Oil pump pressure-limiting valve for preventing eccentric wear of plunger
By designing oil drainage components in the oil pump pressure limiting valve, high-pressure lubricating oil is introduced and pushed through the tapered block to leak evenly, the problem of plunger wear is solved and the service life is improved.
Patent Information
- Application Number
- CN202422473869.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-14
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-10-14
AI Technical Summary
The existing oil pump pressure limiting valve cannot effectively drain oil under high-pressure lubricant conditions, resulting in tight fit between the plunger and the inner wall of the oil pump to increase wear and reduce service life.
An oil pump pressure limiting valve including an oil drain assembly is designed to guide high-pressure lubricating oil into the central cavity through the flow channel. The lubricating oil pushes the conical block through the central hole, flows into the left side of the fixed ring, and is discharged through the oil drain pipe, so that the pressure of the lubricating oil flows more uniform.
It effectively avoids the wear situation caused by large pressure on one side of the plunger, reduces wear and improves the service life of the oil pump.
Smart Images
Figure CN223036160U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of pressure limiting valves, and particularly relates to an oil pump pressure limiting valve for preventing eccentric wear of a plunger. Background Technique
[0002] The oil pump pressure limiting valve plays a role in controlling the oil flow and adjusting the oil pressure during the operation of the oil pump.
[0003] The existing pressure limiting valve usually rotates the handle to adjust the elasticity of the spring, so as to achieve the effect of regulating the oil pressure. However, when the oil pipe pressure is too high, it cannot drain the lubricating oil, so that the high-pressure lubricating oil exerts a large pressure on the plunger, causing eccentric wear, making the plunger closely adhere to the inner wall of the oil pump and increasing the wear. After a long time, the service life of the oil pump will be reduced. Therefore, we propose an oil pump pressure limiting valve for preventing eccentric wear of the plunger. Summary of the Utility Model
[0004] The purpose of the utility model is to provide an oil pump pressure limiting valve for preventing eccentric wear of a plunger. By setting a drain assembly, specifically, after the lubricating oil enters the central cavity, it will push the tapered block to the left through the central hole, and the lubricating oil will smoothly flow into the left side of the fixed ring and then be discharged through the drain pipe at the top for draining. This can make the pressure of the lubricating oil flowing out more uniform, avoid applying a large pressure to one side of the plunger and causing eccentric wear, reduce wear and improve the service life, and solve the problem that the high-pressure lubricating oil exerts a large pressure on the plunger, causing eccentric wear, making the plunger closely adhere to the inner wall of the oil pump and increasing the wear, and reducing the service life of the oil pump after a long time.
[0005] To solve the above technical problems, the utility model is realized through the following technical solutions:
[0006] The utility model is an oil pump pressure limiting valve for preventing eccentric wear of a plunger, including a mounting plate. A valve body is fixedly connected to the front surface of the mounting plate. An oil outlet is opened on the right side of the valve body. A handle is arranged on the left side of the valve body. A drain pipe is fixedly connected to the top of the valve body. A flow cavity, a central cavity and a diversion groove are respectively opened inside the valve body. An oil inlet is opened on the left side of the valve body;
[0007] An oil drain component is arranged inside the centralized cavity. The oil drain component includes a fixed ring. A central hole is provided at the central axis of the fixed ring. The left side of the central hole is tapered. A tapered block is arranged on the left side of the fixed ring. The oil drain pipe communicates with the centralized cavity. By arranging the oil drain component, specifically, when the lubricating oil pressure at the oil outlet is still relatively high, it will flow through the diversion groove to the bottom of the movable rod, and then enter the centralized cavity through the delivery hole and the circulation hole. The lubricating oil then pushes the tapered block to the left through the central hole, and the lubricating oil smoothly flows into the left side of the fixed ring and is discharged through the oil drain pipe at the top for oil drainage. This can make the pressure of the flowing lubricating oil more uniform, avoid applying a large pressure to one side of the plunger and causing eccentric wear, reduce wear and improve the service life.
[0008] Further, the right side of the oil inlet communicates with the left side of the flow cavity, the right side of the flow cavity communicates with the left side of the oil outlet. An movable rod is arranged inside the flow cavity. An movable cavity is provided at the bottom of the flow cavity. The bottom of the movable cavity communicates with the diversion groove. A circulation hole is provided at the top of the flow cavity. The top of the circulation hole communicates with the centralized cavity. The diversion groove is used to divert the high-pressure lubricating oil in the oil outlet, so that the high-pressure lubricating oil can smoothly enter the centralized cavity.
[0009] Further, a telescopic rod is fixedly connected to the left side of the tapered block. A spring is sleeved outside the telescopic rod. An adjusting block is fixedly connected to the left side of the telescopic rod. The left side of the spring is fixedly connected to the right side of the adjusting block. When the adjusting block moves to the left, the spring force decreases and the oil pressure limit is smaller. When the adjusting block moves to the right, the spring force increases and the oil pressure limit is larger.
[0010] Further, a chute is provided at the top of the inner wall of the centralized cavity. A threaded rod is fixedly connected to the right side of the rotary handle. The right side of the threaded rod penetrates through the valve body and extends into the centralized cavity. A limiting ring is fixedly connected to the right side of the threaded rod. An annular limiting groove is provided on the left side of the adjusting block. A convex block is fixedly connected to the top of the adjusting block. The outer surface of the limiting ring is rotatably connected to the inner wall of the annular limiting groove. The outer surface of the convex block contacts the inner wall of the chute. The outer circle of the adjusting block is slidably connected to the inner wall of the centralized cavity. The right side of the tapered block is inserted into the left side of the fixed ring. The right side of the tapered block is tapered. Since both the right side of the tapered block and the left side of the central hole are tapered, better sealing can be achieved, and at the same time, it is convenient for the lubricating oil to push the tapered block.
[0011] Further, three limiting grooves are provided at the bottom of the movable rod, and limiting rods are slidably connected to the inner walls of the three limiting grooves. The bottom of the limiting rod is fixedly connected to the bottom of the inner wall of the movable cavity. A conveying hole is provided at the central axis of the movable rod. By providing the movable rod, specifically, lubricating oil enters the flow cavity from the oil inlet. Since the top of the movable rod is pushed downward by the pressure spring, when the lubricating oil enters the flow cavity, when the pressure is too high, the oil inlet will be pushed upward, thereby playing a certain pressure-reducing role, being able to decelerate the lubricating oil and reduce the pressure.
[0012] Further, an annular limiting plate is fixedly connected to the outer surface of the movable rod. The top of the annular limiting plate is in contact with the inner wall of the flow cavity. A pressure spring is fixedly connected to the top of the movable rod, and the top of the pressure spring is fixedly connected to the top of the inner wall of the flow cavity. The outer surface of the movable rod is in contact with the inner wall of the movable cavity. Since the outer surface of the movable rod is in contact with the inner wall of the movable cavity, it can play a sealing role to prevent high-pressure lubricating oil from overflowing.
[0013] The utility model has the following beneficial effects:
[0014] 1. By providing an oil drainage assembly, specifically, when the pressure of the lubricating oil at the oil outlet is still relatively high, it will flow to the bottom of the movable rod through the diversion groove, then enter the central cavity through the conveying hole and the circulation hole. The lubricating oil will push the conical block to the left through the central hole, and the lubricating oil will smoothly flow into the left side of the fixed ring and then be discharged through the oil drain pipe at the top for oil drainage, which can make the pressure of the lubricating oil flowing out more uniform, avoid applying a large pressure to one side of the plunger and causing uneven wear, and reduce wear and improve the service life.
[0015] 2. By providing the movable rod, specifically, lubricating oil enters the flow cavity from the oil inlet. Since the top of the movable rod is pushed downward by the pressure spring, when the lubricating oil enters the flow cavity, when the pressure is too high, the oil inlet will be pushed upward, thereby playing a certain pressure-reducing role, being able to first decelerate the lubricating oil and reduce the pressure.
[0016] Of course, it is not necessary for any product implementing the utility model to achieve all the above advantages simultaneously. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0019] Figure 2 It is a schematic diagram of the internal sectional structure of the valve body of this utility model;
[0020] Figure 3 For this utility model Figure 2 An enlarged structural schematic diagram of A in it;
[0021] Figure 4 It is a schematic diagram of the internal structure of the valve body of this utility model;
[0022] Figure 5 It is a schematic diagram of the overall structure of the movable rod of this utility model.
[0023] In the attached drawings, the list of components represented by each reference numeral is as follows:
[0024] 1. Mounting plate; 11. Valve body; 111. Oil outlet; 112. Flow cavity; 113. Oil inlet; 114. Concentrating cavity; 115. Diversion groove; 116. Movable cavity; 117. Through hole; 12. Oil drain assembly; 121. Fixed ring; 211. Central hole; 122. Tapered block; 123. Telescopic rod; 124. Spring; 125. Adjusting block; 13. Movable rod; 131. Limiting rod; 132. Delivery hole; 133. Annular limiting plate; 2. Rotating handle; 21. Threaded rod; 22. Limiting ring; 3. Oil drain pipe. Specific embodiments
[0025] Next, the technical solutions in the embodiments of this utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, rather than all of the embodiments. Based on the embodiments in this utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of this utility model.
[0026] Please refer to Figures 1-5As shown in the figure, this utility model is an oil pump pressure limiting valve for preventing eccentric wear of the plunger, including a mounting plate 1. A valve body 11 is fixedly connected to the front of the mounting plate 1. An oil outlet 111 is provided on the right side of the valve body 11. A turning handle 2 is arranged on the left side of the valve body 11. A drain pipe 3 is fixedly connected to the top of the valve body 11. A flow cavity 112, a central cavity 114 and a diversion groove 115 are respectively provided inside the valve body 11. An oil inlet 113 is provided on the left side of the valve body 11. The right side of the oil inlet 113 communicates with the left side of the flow cavity 112. The right side of the flow cavity 112 communicates with the left side of the oil outlet 111. A movable rod 13 is arranged inside the flow cavity 112. An annular limiting plate 133 is fixedly connected to the outer surface of the movable rod 13. The top of the annular limiting plate 133 contacts the inner wall of the flow cavity 112. A pressure spring is fixedly connected to the top of the movable rod 13. The top of the pressure spring is fixedly connected to the top inner wall of the flow cavity 112. The outer surface of the movable rod 13 contacts the inner wall of the movable cavity 116. A movable cavity 116 is provided at the bottom of the flow cavity 112. The bottom of the movable cavity 116 communicates with the diversion groove 115. A circulation hole 117 is provided at the top of the flow cavity 112. The top of the circulation hole 117 communicates with the central cavity 114. A drain assembly 12 is arranged inside the central cavity 114. The drain assembly 12 includes a fixed ring 121. A central hole 211 is provided at the axis of the fixed ring 121. The left side of the central hole 211 is tapered. A tapered block 122 is arranged on the left side of the fixed ring 121. A telescopic rod 123 is fixedly connected to the left side of the tapered block 122. A spring 124 is sleeved outside the telescopic rod 123. An adjusting block 125 is fixedly connected to the left side of the telescopic rod 123. The left side of the spring 124 is fixedly connected to the right side of the adjusting block 125. The drain pipe 3 communicates with the central cavity 114. By setting the drain assembly 12, specifically when the lubricating oil pressure at the oil outlet 111 is still relatively large, it will flow to the bottom of the movable rod 13 through the diversion groove 115. Three limiting grooves are provided at the bottom of the movable rod 13. Limiting rods 131 are slidably connected to the inner walls of the three limiting grooves. The bottom of the limiting rods 131 is fixedly connected to the bottom inner wall of the movable cavity 116. A delivery hole 132 is provided at the axis of the movable rod 13. By setting the movable rod 13, specifically, the lubricating oil enters the flow cavity 112 from the oil inlet 113. Since the top of the movable rod 13 is pushed downward by the pressure spring, when the lubricating oil enters the flow cavity 112 and the pressure is too high, it will push the oil inlet 113 upward, thus playing a certain pressure reducing role. It can first slow down the lubricating oil, reduce the pressure, and then enter the central cavity 114 through the delivery hole 132 and the circulation hole 117. A chute is provided at the top inner wall of the central cavity 114. A threaded rod 21 is fixedly connected to the right side of the turning handle 2. The right side of the threaded rod 21 penetrates through the valve body 11 and extends into the central cavity 114. A limiting ring 22 is fixedly connected to the right side of the threaded rod 21. An annular limiting groove is provided on the left side of the adjusting block 125. A convex block is fixedly connected to the top of the adjusting block 125. The outer surface of the limiting ring 22 is rotatably connected to the inner wall of the annular limiting groove. The outer surface of the convex block contacts the inner wall of the chute. The outer circle of the adjusting block 125 is slidably connected to the inner wall of the central cavity 114.The right side of the conical block 122 is inserted into the left side of the fixed ring 121. The right side of the conical block 122 is conically arranged. The lubricating oil then pushes the conical block 122 to the left through the central hole 211, and the lubricating oil smoothly flows into the left side of the fixed ring 121 and is discharged through the drain pipe 3 at the top for oil drainage. This can make the pressure of the lubricating oil outflow more uniform, avoid uneven wear caused by applying a large pressure to one side of the plunger, reduce wear and improve the service life.
[0027] A specific application of this embodiment is as follows:
[0028] During use, the lubricating oil enters the flow chamber 112 from the oil inlet 113, and then flows to the oil outlet 111 through the gap between the movable rod 13 and the flow chamber 112. Since the top of the movable rod 13 is pushed downward by the pressure spring, when the lubricating oil enters the flow chamber 112 and the pressure is too high, the oil inlet 113 will be pushed upward, thus playing a certain pressure reducing role. The movable rod 13 slides on the limiting rod 131, which can make the movement of the movable rod 13 more stable. When the pressure of the lubricating oil flowing to the oil outlet 111 is still high, it will flow to the bottom of the movable rod 13 through the diversion groove 115, then flow to the top of the movable rod 13 through the delivery hole 132 at the center of the movable rod 13, and then enter the centralized chamber 114 through the circulation hole 117. When the oil pressure is greater than the elastic force of the spring 124, the lubricating oil will push the conical block 122 to the left through the central hole 211, then the spring 124 is compressed, and the lubricating oil smoothly flows into the left side of the fixed ring 121 and is discharged through the drain pipe 3 at the top for oil drainage. This can make the pressure of the lubricating oil outflow more uniform, avoid uneven wear caused by applying a large pressure to one side of the plunger, reduce wear and improve the service life. When it is necessary to adjust the oil pressure, rotate the handle 2 to drive the threaded rod 21 to rotate, then the threaded rod 21 drives the adjusting block 125 to move to the left or right through the limiting ring 22, thereby adjusting the elastic force of the spring 124 to achieve the function of limiting pressure. Since the adjusting block 125 slides in the chute at the top of the centralized chamber 114 through the convex block at the top, it can play a limiting role on the adjusting block 125 and make the adjusting block 125 move in a straight line.
[0029] In the description of this specification, the description referring to terms such as "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.
[0030] The preferred embodiments of the utility model disclosed above are only used to help illustrate the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific embodiments described. Obviously, many modifications and variations can be made according to the content of this specification. These embodiments are selected and specifically described in this specification in order to better explain the principle and practical application of the utility model, so that those skilled in the relevant technical field can well understand and utilize the utility model. The utility model is only limited by the claims and their full scope and equivalents.
Claims
1. An oil pump pressure limiting valve for preventing eccentric wear of a plunger, comprising a mounting plate (1), a valve body (11) being fixedly connected to the front of the mounting plate (1), an oil outlet (111) being provided on the right side of the valve body (11), and a turning handle (2) being provided on the left side of the valve body (11), characterized in that: The top of the valve body (11) is fixedly connected to an oil drain pipe (3); a flow chamber (112), a concentration chamber (114) and a guide groove (115) are respectively provided inside the valve body (11); and an oil inlet (113) is provided on the left side of the valve body (11); An oil drain component (12) is arranged inside the central cavity (114), and the oil drain component (12) comprises a fixing ring (121). A center hole (211) is opened at the central axis of the fixing ring (121). The left side of the center hole (211) is conical. A conical block (122) is arranged on the left side of the fixing ring (121). The oil drain pipe (3) and the central cavity (114) are interconnected.
2. The oil pump pressure limiting valve for preventing plunger eccentric wear according to claim 1, characterized in that: The right side of the oil inlet (113) and the left side of the flow chamber (112) are interconnected, and the right side of the flow chamber (112) and the left side of the oil outlet (111) are interconnected. A movable rod (13) is arranged inside the flow chamber (112). A movable chamber (116) is provided at the bottom of the flow chamber (112). The bottom of the movable chamber (116) and the guide groove (115) are interconnected. A circulation hole (117) is provided at the top of the flow chamber (112). The top of the circulation hole (117) and the concentration chamber (114) are interconnected.
3. The oil pump pressure limiting valve for preventing plunger eccentric wear according to claim 2, characterized in that: A telescopic rod (123) is fixedly connected to the left side of the conical block (122), a spring (124) is sleeved on the outside of the telescopic rod (123), an adjustment block (125) is fixedly connected to the left side of the telescopic rod (123), and the left side of the spring (124) is fixedly connected to the right side of the adjustment block (125).
4. The oil pump pressure limiting valve for preventing plunger eccentric wear according to claim 3, characterized in that: A sliding groove is provided on the top of the inner wall of the central cavity (114); a threaded rod (21) is fixedly connected to the right side of the turning handle (2); the right side of the threaded rod (21) passes through the valve body (11) and extends into the central cavity (114); a limiting ring (22) is fixedly connected to the right side of the threaded rod (21); an annular limiting groove is provided on the left side of the adjusting block (125); and a protrusion is fixedly connected to the top of the adjusting block (125).
5. The oil pump pressure limiting valve for preventing plunger eccentric wear according to claim 4, characterized in that: The outer surface of the limiting ring (22) is rotatably connected to the inner wall of the annular limiting groove, the outer surface of the protrusion contacts the inner wall of the slide groove, the outer ring of the adjustment block (125) is slidably connected to the inner wall of the central cavity (114), the right side of the conical block (122) is plugged into the left side of the fixing ring (121), and the right side of the conical block (122) is conically set.
6. The oil pump pressure limiting valve for preventing plunger eccentric wear according to claim 4, characterized in that: The bottom of the movable rod (13) is provided with three limit grooves, the inner walls of the three limit grooves are slidably connected to the limit rod (131), the bottom of the limit rod (131) is fixedly connected to the bottom of the inner wall of the movable cavity (116), and a conveying hole (132) is provided at the central axis of the movable rod (13).
7. The oil pump pressure limiting valve for preventing plunger eccentric wear according to claim 5, characterized in that: An annular limiting plate (133) is fixedly connected to the outer surface of the movable rod (13), and the top of the annular limiting plate (133) contacts the inner wall of the flow chamber (112). A pressure spring is fixedly connected to the top of the movable rod (13), and the top of the pressure spring is fixedly connected to the top of the inner wall of the flow chamber (112). The outer surface of the movable rod (13) contacts the inner wall of the movable chamber (116).