Grease-free plunger pump
By adopting V-shaped water sealing and liquid lubrication mechanisms in the plunger pump, the problem of easy wear and leakage of the plunger pump is solved, achieving efficient sealing without butter lubrication and extending service life.
Patent Information
- Application Number
- CN202422567761.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-24
- Publication Date
- 2025-08-01
- Estimated Expiration
- 2034-10-24
AI Technical Summary
Existing plunger pumps are prone to wear and leaking, and need to be lubricated with butter, and their service life is not long.
The V-shaped water seal structure is adopted, combined with liquid lubrication and self-lubricating mechanisms, and the plunger is sealed through the V-shaped water seal and self-lubricated when leaking. The inlet and outlet water valve is used to control the inlet and outlet water activities to avoid butter lubrication.
It achieves the improvement of the sealing and service life of the plunger pump, reduces friction and extends service life.
Smart Images
Figure CN223177716U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of plunger pumps, and particularly relates to a grease-free plunger pump. Background Art
[0002] A plunger pump is an important device in a hydraulic system. It relies on the reciprocating movement of a plunger in a cylinder block to change the volume of a sealed working chamber to achieve oil suction and oil pressure. The plunger pump has the advantages of high rated pressure, compact structure, high efficiency, and convenient flow regulation. The plunger pump is widely used in occasions where high pressure, large flow, and flow regulation are required, such as hydraulic presses, construction machinery, and ships.
[0003] In the specification of a plunger pump in the prior art (publication number CN215595871U), it is mentioned that "an oil inlet and an oil outlet are provided on the pump body, a sealing cover is sleeved at the oil inlet, and a tubing joint communicated with the sealing cover, an inclined plate chamber is provided in the pump body, and a lubrication channel for communicating the inclined plate chamber and the sealing cover is further included", but the plunger pump in the prior art is prone to wear and water leakage, and the grease-lubricated plunger pump has a short service life. Summary of the Invention
[0004] To overcome the defects of the prior art, a grease-free plunger pump is provided to solve the problems that the plunger pump in the prior art is prone to wear and water leakage, and the grease-lubricated plunger pump has a short service life.
[0005] To achieve the above object, a grease-free plunger pump is provided, which includes a crankcase, a plunger, and an inlet and outlet valve. A crankshaft is arranged in the middle of the crankcase, and a connecting rod is movably connected to the crankshaft. The front end of the connecting rod extends into the rear part of the plunger, and the front end of the plunger is sleeved in the rear part of the connecting rod. An upper interface is arranged in the middle of the upper side of the cylinder block at the front of the crankcase, and a drainage chamber is installed in the upper interface in the middle of the upper side of the cylinder block. An inlet chamber is installed on the front side of the cylinder block, and an inlet and outlet valve is installed at the interface between the inlet chamber and the cylinder block.
[0006] Further, a support plate is arranged on the lower side of the crankcase, and a base is fixed to the lower end of the support plate on the lower side of the crankcase.
[0007] Further, a V-shaped water seal is sleeved between the rear part of the connecting rod and the plunger, and an intermediate ring is arranged at the rear side of the V-shaped water seal.
[0008] Further, a pressure ring is arranged at the rear side of the intermediate ring, and a secondary water seal is arranged at the rear side of the pressure ring.
[0009] Further, an adjusting ring is arranged at the rear side of the secondary water seal, the front part of the adjusting ring is sleeved outside the rear part of the secondary water seal, and the adjusting ring and the secondary water seal are detachably connected.
[0010] Further, a water inlet and outlet valve is installed between the middle interface on the upper side of the cylinder block and the drainage chamber, and the cylinder block and the plunger are connected and communicated with each other.
[0011] The beneficial effects of the present utility model are as follows:
[0012] 1. In the present utility model, the V-shaped water seal is provided to lubricate the V-shaped water seal and the plunger by liquid during the sealing process of the first V-shaped water seal on the plunger, eliminating the need for grease lubrication, which is more convenient and time-saving;
[0013] 2. At the same time, in order to apply a special grease appropriately during assembly, when the first V-shaped water seal is effectively sealed, it plays a pre-lubricating role for the first and second V-shaped water seals; and when the first V-shaped water seal leaks slightly, liquid enters the intermediate ring for storage, and the liquid plays a self-lubricating role for the first and second V-shaped water seals.
[0014] 3. In the present utility model, a pressure ring and a secondary water seal are provided behind the second V-shaped water seal. The pressure ring plays a supporting role for the V-shaped water seal under high pressure, and at the same time plays a role of storing liquid for self-lubrication when the water seal leaks slightly. The role of the secondary water seal is to block and isolate the liquid to prevent external leakage when the V-shaped water seal in the crankshaft passage leaks slightly.
[0015] 4. An adjusting compression ring is provided behind the secondary water seal. Its function is that when there is slight leakage during long-term operation, the V-shaped water seal can be reopened by adjusting the compression ring, so that the V-shaped water seal and the plunger can play a sealing role again, and multiple adjustments can be made to improve the overall service life.
[0016] 5. In the present utility model, water inlet and outlet valves are provided between the cylinder block and the water inlet chamber and the drainage chamber, which can closely control the water inlet and outlet activities, making it more compact and reliable. Description of the Drawings
[0017] Figure 1 is the front view schematic diagram of the embodiment of the present utility model;
[0018] Figure 2 is the sectional view schematic diagram of the embodiment of the present utility model;
[0019] Figure 3 is the structural schematic diagram of the water inlet chamber of the embodiment of the present utility model;
[0020] Figure 4 is the structural schematic diagram of the drainage chamber of the embodiment of the present utility model.
[0021] In the figure: 1, crankcase; 2, crankshaft; 3, connecting rod; 4, plunger; 5, adjusting ring; 6, secondary water seal; 7, pressure ring; 8, intermediate ring; 9, V-shaped water seal; 10, cylinder block; 11, water inlet and outlet valve; 12, water inlet chamber; 13, drainage chamber. Detailed Embodiment
[0022] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. The specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model. Specific details such as specific system structures and technologies are proposed to more thoroughly understand the embodiments of the present utility model. The described embodiments are some embodiments of the present disclosure, rather than all embodiments. However, those skilled in the art should understand that the present utility model can also be implemented in other embodiments without these specific details. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of protection of the present disclosure.
[0023] The following will describe in detail the specific implementation manners of the present utility model with reference to the accompanying drawings.
[0024] Figure 1 is a front view schematic diagram of an embodiment of the present utility model, Figure 2 is a cross-sectional schematic diagram of an embodiment of the present utility model, Figure 3 is a structural schematic diagram of the water inlet chamber of an embodiment of the present utility model and Figure 4 is a structural schematic diagram of the water drainage chamber of an embodiment of the present utility model.
[0025] Referring to Figures 1 to 4 as shown, the present utility model provides an oil-free plunger pump, which includes a crankcase 1, a plunger 4 and an inlet and outlet valve 11. A crankshaft 2 is arranged in the middle of the crankcase 1, and a connecting rod 3 is movably connected to the crankshaft 2. The front end of the connecting rod 3 extends into the rear part of the plunger 4, and the front end of the plunger 4 is sleeved in the rear part of the connecting rod 3. An upper interface is arranged in the middle of the upper side of the cylinder block 10 at the front of the crankcase 1, and a water drainage chamber 13 is installed in the upper interface in the middle of the upper side of the cylinder block 10. A water inlet chamber 12 is installed on the front side of the cylinder block 10, and an inlet and outlet valve 11 is installed at the interface between the water inlet chamber 12 and the cylinder block 10.
[0026] In this embodiment, a support plate is arranged on the lower side of the crankcase 1, and a base is fixed at the lower end of the support plate on the lower side of the crankcase 1; a V-shaped water seal 9 is sleeved between the rear part of the connecting rod 3 and the plunger 4, and an intermediate ring 8 is arranged at the rear side of the V-shaped water seal 9.
[0027] As a preferred implementation manner, in the present utility model, the V-shaped water seal 9 is provided to lubricate the V-shaped water seal and the plunger by liquid during the sealing process of the first V-shaped water seal to the plunger;
[0028] At the same time, it is used to apply a special grease appropriately during assembly. When the first V-shaped water seal is effectively sealed, it plays a role in pre-lubricating the first and second V-shaped water seals; and when the first V-shaped water seal leaks slightly, liquid enters the intermediate ring for storage, and the liquid plays a self-lubricating role for the first and second V-shaped water seals.
[0029] In this embodiment, a pressure ring 7 is provided at the rear side of the intermediate ring 8, and a secondary water seal 6 is provided at the rear side of the pressure ring 7; a regulating ring 5 is provided at the rear side of the secondary water seal 6, and the front part of the regulating ring 5 is sleeved outside the rear part of the secondary water seal 6, and the regulating ring 5 and the secondary water seal 6 are detachably connected.
[0030] As a preferred embodiment, the present utility model is provided with a pressure ring and a secondary water seal after the second V-shaped water seal. The pressure ring plays a supporting role for the V-shaped water seal under high-pressure stress, and at the same time plays a role of storing liquid for self-lubrication when the water seal leaks slightly. The role of the water seal is to block and isolate the liquid to prevent external leakage when the 2-way V-shaped water seal of the crankshaft leaks slightly.
[0031] A regulating and pressing ring is provided behind the secondary water seal. Its role is that when there is slight leakage during long-term operation, the V-shaped water seal can be reopened by adjusting the regulating and pressing ring, so that the V-shaped water seal and the plunger can play a sealing role again, and multiple adjustments can be made to improve the overall service life.
[0032] In this embodiment, a water inlet and outlet valve is installed between the middle interface on the upper side of the cylinder block 10 and the drainage chamber 13, and the cylinder block 10 and the plunger 4 are connected in communication.
[0033] As a preferred embodiment, water inlet and outlet valves are provided between the cylinder block 10 of the present utility model and the water inlet chamber 12 and the drainage chamber 13, which can tightly control the water inlet and outlet activities and are more tightly and reliably.
[0034] The present utility model can effectively solve the problems in the prior art that the plunger pump is prone to wear and leak water, and the plunger pump that needs to be lubricated with butter has a short service life. The present utility model uses the power to rotate the crankshaft to drive the plunger to make a reciprocating motion through the connecting rod. Through the sealing action of the V-shaped water seal, during the sealing process of the V-shaped water seal on the plunger, a multi-channel self-lubricating sealing structure is designed. To reduce friction, butter can be avoided and lubrication can be increased to improve the service life.
[0035] The above embodiments are used to explain and illustrate the present utility model, rather than limiting the utility model. Any modifications and changes made to the present utility model within the spirit of the present utility model and the scope of the claimed rights shall be included in the protection scope of the present utility model.
Claims
1. A butter-free plunger pump, characterized in that: It includes a crankcase (1), a plunger (4), and inlet and outlet valves (11). In the middle of the crankcase (1), a crankshaft (2) is provided, and a connecting rod (3) is movably connected to the crankshaft (2). The front end of the connecting rod (3) extends into the rear part of the plunger (4), and the front end of the plunger (4) is sleeved in the rear part of the connecting rod (3). An upper interface is provided in the middle of the upper side of the cylinder block (10) at the front of the crankcase (1), and a drainage chamber (13) is installed in the upper interface in the middle of the upper side of the cylinder block (10). An inlet chamber (12) is installed on the front side of the cylinder block (10), and an inlet and outlet valve (11) is installed at the interface between the inlet chamber (12) and the cylinder block (10).
2. The butter-free plunger pump according to claim 1, characterized in that, A support plate is provided on the lower side of the crankcase (1), and a base is fixed to the lower end of the support plate on the lower side of the crankcase (1).
3. The butter-free plunger pump according to claim 1, characterized in that, A V-shaped water seal (9) is sleeved between the rear part of the connecting rod (3) and the plunger (4), and an intermediate ring (8) is provided at the rear side of the V-shaped water seal (9).
4. The grease-free plunger pump according to claim 3, wherein, A compression ring (7) is provided at the rear side of the intermediate ring (8), and a secondary water seal (6) is provided at the rear side of the compression ring (7).
5. The butter-free plunger pump according to claim 4, wherein An adjusting ring (5) is provided at the rear side of the secondary water seal (6), and the front part of the adjusting ring (5) is sleeved outside the rear part of the secondary water seal (6), and the adjusting ring (5) and the secondary water seal (6) are detachably connected.
6. The butter-free plunger pump according to claim 1, wherein, An inlet and outlet valve is installed between the interface in the middle of the upper side of the cylinder block (10) and the drainage chamber (13), and the cylinder block (10) and the plunger (4) are connected in communication.