Hydraulic power device of plunger pump

Abstract

The utility model discloses a hydraulic power device of a plunger pump, which belongs to the field of plunger pumps and comprises a shell, a plunger is slidably mounted on the shell through a working cavity, a cylindrical groove is arranged on the shell and positioned on the outer side of the plunger, a liquid storage cavity is arranged on the end face of the shell, and the liquid storage cavity is communicated with the working cavity. A micro pump is mounted at the bottom of an inner cavity of the liquid storage cavity; through the cylindrical groove, the liquid storage cavity and the like, the cylindrical groove is filled with the cooling liquid, the surrounding edge and the plunger of the working cavity are cooled, the liquid inlet pipe and the liquid outlet pipe are used in cooperation, the cooling liquid in the cylindrical groove is replaced, the surrounding edge and the plunger of the working cavity are continuously cooled, and the situation that when an existing hydraulic power device works, the cooling liquid in the cylindrical groove is replaced is avoided. The problems that the temperature of the plunger and the periphery of the containing cavity rapidly rises due to long-time reciprocating sliding of the plunger in the containing cavity, and parts of the plunger pump expand due to the high temperature are solved, meanwhile, the possibility of leakage of the hydraulic power device is avoided, abrasion of the parts is reduced, and the service life is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of piston pump technology, specifically a hydraulic power device for a piston pump. Background Technology

[0002] A piston pump is a highly efficient hydraulic device that uses the reciprocating motion of a piston to achieve the intake and discharge of liquid. As an important component of a hydraulic system, the piston pump boasts advantages such as high rated pressure, compact structure, high efficiency, and convenient flow regulation. It is widely used in high-pressure, high-flow-rate applications where flow regulation is required, such as hydraulic presses, construction machinery, and ships.

[0003] When the hydraulic power unit of the existing plunger pump is working, the plunger slides back and forth in the cavity for a long time, which causes the temperature of the plunger itself and the surrounding cavity to rise rapidly. The high temperature causes the plunger pump components to expand and the clearance to change. This not only increases the possibility of leakage, but also accelerates the wear of components and shortens their service life.

[0004] Therefore, this utility model provides a hydraulic power device for a piston pump to solve the above-mentioned problems. Utility Model Content

[0005] This utility model provides a hydraulic power unit for a piston pump, aiming to solve the problems mentioned in the background art, such as the rapid increase in temperature of the piston itself and the surrounding area of ​​the cavity caused by the piston sliding back and forth in the cavity for a long time during operation. The high temperature causes the piston pump components to expand, which not only increases the possibility of leakage, but also accelerates the wear of the components.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a hydraulic power device for a plunger pump, comprising a housing, wherein a plunger is slidably mounted on the housing through a working chamber;

[0007] A cylindrical groove is formed on the outer shell, located outside the plunger. A liquid storage chamber is formed on the end face of the outer shell. A micro pump is installed at the bottom of the inner cavity of the liquid storage chamber. An inlet pipe is installed at the outlet end of the micro pump. An outlet pipe is installed on the right side wall of the liquid storage chamber through a second mounting hole. By filling the cylindrical groove with coolant through the cylindrical groove and the liquid storage chamber, the perimeter of the working chamber and the plunger are cooled. The coolant in the cylindrical groove is replaced by the inlet and outlet pipes in combination, continuously cooling the perimeter of the working chamber and the plunger. This avoids the problem of rapid temperature rise of the plunger and the surrounding cavity caused by prolonged reciprocating sliding of the plunger in the cavity during operation of existing hydraulic power devices. High temperatures can cause the plunger pump components to expand. At the same time, it avoids the possibility of leakage in the hydraulic power device, reduces component wear, and improves service life.

[0008] Preferably, the front of the outer casing has an opening, through which a plate is installed. Two fixing ears are installed on the end face and bottom of the plate, and bolts for fixing the fixing ears are installed on the outer casing through threaded holes.

[0009] Preferably, the outer casing has a first mounting hole for installing a liquid inlet pipe, the water outlet end of the liquid inlet pipe passes through the first mounting hole and extends into the cylindrical groove, and the water inlet end of the liquid outlet pipe communicates with the cylindrical groove.

[0010] Preferably, a sealing plate is installed on the end face of the outer shell and the upper side of the liquid storage cavity, and a liquid filling port is provided on the sealing plate. A heat sink is installed on the outer shell and on the rear side of the liquid storage cavity.

[0011] Preferably, a power shaft is rotatably mounted on the back of the housing via a bearing, and a turntable is mounted on the other end of the power shaft inside the housing. A connecting rod is rotatably mounted on the turntable via an eccentric shaft. The end of the connecting rod away from the turntable is rotatably connected to a plunger via a universal joint. One-way valves are installed on the upper and lower sides of the housing, corresponding to the working chamber.

[0012] Preferably, an annular groove is provided on the outer casing and on the rear side of the plate, and a sealing ring is installed on the outer casing through the annular groove.

[0013] Beneficial effects: By filling the cylindrical groove with coolant through the reservoir, the working chamber's perimeter and plunger are cooled. The coolant in the cylindrical groove is replaced through the use of inlet and outlet pipes, continuously cooling the working chamber's perimeter and plunger. This avoids the problem in existing hydraulic power units where the plunger's prolonged reciprocating sliding within the cavity causes a rapid increase in temperature of the plunger itself and the cavity's surroundings, which can lead to expansion of plunger pump components due to high temperatures. It also avoids the possibility of leakage in the hydraulic power unit, reduces component wear, and extends service life. Attached Figure Description

[0014] Figure 1 A schematic diagram of the isometric three-dimensional disassembled structure of a hydraulic power unit for a piston pump;

[0015] Figure 2 A schematic diagram of the isometric three-dimensional disassembled structure of a hydraulic power unit for a piston pump;

[0016] Figure 3 A schematic diagram of the southeast isometric three-dimensional cross-section of the hydraulic power unit of a piston pump;

[0017] Figure 4 This is a partial isometric structural diagram of a hydraulic power unit for a piston pump.

[0018] In the diagram: 1. Outer shell; 11. Working chamber; 12. Cylindrical groove; 13. Liquid storage chamber; 14. First mounting hole; 15. Second mounting hole; 16. Sealing plate; 161. Liquid inlet; 17. Opening; 18. Annular groove; 19. One-way valve; 2. Plunger; 3. Micro pump; 4. Liquid inlet pipe; 5. Liquid outlet pipe; 6. Heat sink; 7. Plate; 71. Fixing lug; 8. Bolt; 9. Sealing ring; 10. Drive shaft; 101. Turntable; 102. Connecting rod. Detailed Implementation

[0019] 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.

[0020] Example 1

[0021] This embodiment provides a hydraulic power unit for a piston pump, such as... Figure 1-4 As shown, the hydraulic power unit includes a housing 1, and a plunger 2 is slidably mounted on the housing 1 through a working chamber 11;

[0022] A cylindrical groove 12 is provided on the outer shell 1 and outside the plunger 2. A liquid storage chamber 13 is provided on the end face of the outer shell 1. A micro pump 3 is installed at the bottom of the inner cavity of the liquid storage chamber 13. An inlet pipe 4 is installed at the outlet end of the micro pump 3. An outlet pipe 5 is installed on the right side wall of the liquid storage chamber 13 through the second mounting hole 15.

[0023] In use, the micro pump 3 is started, and the micro pump 3 delivers coolant from the storage chamber 13 to the cylindrical tank 12 through the inlet pipe 4, filling the cylindrical tank 12 with coolant to cool the perimeter of the working chamber 11 and the plunger 2. Through the inlet pipe 4 and the outlet pipe 5, the inlet pipe 4 adds coolant to the cylindrical tank 12, and the outlet pipe 5 returns the high-temperature liquid in the cylindrical tank 12 to the storage chamber 13, thereby continuously replacing the coolant in the cylindrical tank 12 and continuously cooling the perimeter of the working chamber 11 and the plunger 2. The cooling effect is better, avoiding the problem of rapid temperature rise of the plunger 2 and the surrounding area of ​​the chamber caused by the plunger 2 sliding back and forth in the cavity for a long time during the operation of the existing hydraulic power device. High temperature will cause the plunger pump components to expand. At the same time, it avoids the possibility of leakage in the hydraulic power device, reduces component wear, and improves service life.

[0024] In this embodiment, the outer shell 1 is provided with a first mounting hole 14 for installing the liquid inlet pipe 4. The water outlet end of the liquid inlet pipe 4 passes through the first mounting hole 14 and extends into the cylindrical groove 12. The water inlet end of the liquid outlet pipe 5 communicates with the cylindrical groove 12. A sealing plate 16 is installed on the end face of the outer shell 1 and the upper side of the liquid storage cavity 13. A liquid filling port 161 is provided on the sealing plate 16. A heat sink 6 is installed on the outer shell 1 and located on the rear side of the liquid storage cavity 13.

[0025] A heat sink 6 is installed on the outer shell 1 and on the rear side of the liquid storage chamber 13. The heat sink 6 is used to cool the coolant in the liquid storage chamber 13, so that the coolant in the liquid storage chamber 13 is kept at a low temperature. Thus, through the cooperation of the liquid inlet pipe 4 and the liquid outlet pipe 5, the coolant in the liquid storage chamber 13 and the cylindrical tank 12 are exchanged, and the hydraulic power device is continuously cooled.

[0026] In this embodiment, a power shaft 10 is rotatably mounted on the back of the outer casing 1 via a bearing. A turntable 101 is mounted on the other end of the power shaft 10 and inside the outer casing 1. A connecting rod 102 is rotatably mounted on the turntable 101 via an eccentric shaft. The end of the connecting rod 102 away from the turntable 101 is rotatably connected to the plunger 2 via a universal joint. One-way valves 19 are installed on the upper and lower sides of the outer casing 1, corresponding to the working chamber 11.

[0027] Example 2

[0028] Unlike Embodiment 1, the housing of existing plunger pumps is mostly integrally formed, which makes it inconvenient to maintain and repair the internal hydraulic power unit of the plunger pump. Therefore, an opening 17 is provided on the front of the housing 1, and a plate 7 is installed on the housing 1 through the opening 17. Two fixing ears 71 are installed on the end face and bottom of the plate 7, and bolts 8 for fixing the fixing ears 71 are installed on the housing 1 through threaded holes.

[0029] When in use, the bolt 8 is installed by engaging with the threaded hole of the outer casing 1, which facilitates the quick disassembly and installation of the plate 7. This makes it easier for people to maintain, inspect and repair the internal hydraulic power unit of the plunger pump. It avoids the problem that the outer casing of most existing plunger pumps is one piece, which makes it inconvenient to maintain and repair the internal hydraulic power unit of the plunger pump, thus bringing convenience to the use of the plunger pump.

[0030] In this embodiment, an annular groove 18 is provided on the outer shell 1 and on the rear side of the plate 7, and a sealing ring 9 is installed on the outer shell 1 through the annular groove 18;

[0031] A sealing ring 9 is installed in the outer shell 1 through the annular groove 18. When the plate 7 and the outer shell 1 are connected and installed, the sealing ring 9 ensures the sealing of the connection between the plate 7 and the outer shell 1.

[0032] 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 concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A hydraulic power unit for a piston pump, comprising a housing (1), characterized in that: The outer shell (1) is slidably fitted with a plunger (2) through the working chamber (11); A cylindrical groove (12) is provided on the outer shell (1) and located outside the plunger (2). A liquid storage chamber (13) is provided on the end face of the outer shell (1). A micro pump (3) is installed at the bottom of the inner cavity of the liquid storage chamber (13). An inlet pipe (4) is installed at the outlet end of the micro pump (3). An outlet pipe (5) is installed on the right side wall of the liquid storage chamber (13) through a second mounting hole (15).

2. The hydraulic power unit of the plunger pump according to claim 1, characterized in that: The front of the outer shell (1) has an opening (17), and a plate (7) is installed on the outer shell (1) through the opening (17). Two fixing ears (71) are installed on the end face and bottom of the plate (7), and bolts (8) for fixing the fixing ears (71) are installed on the outer shell (1) through threaded holes.

3. The hydraulic power unit of the plunger pump according to claim 1, characterized in that: The outer shell (1) has a first mounting hole (14) for installing the liquid inlet pipe (4). The water outlet end of the liquid inlet pipe (4) passes through the first mounting hole (14) and extends into the cylindrical groove (12). The water inlet end of the liquid outlet pipe (5) is connected to the cylindrical groove (12).

4. The hydraulic power unit of the plunger pump according to claim 1, characterized in that: A sealing plate (16) is installed on the end face of the outer shell (1) and the upper side of the liquid storage cavity (13). A liquid filling port (161) is provided on the sealing plate (16). A heat sink (6) is installed on the outer shell (1) and on the rear side of the liquid storage cavity (13).

5. The hydraulic power unit of the plunger pump according to claim 1, characterized in that: A power shaft (10) is rotatably mounted on the back of the outer shell (1) via a bearing. A turntable (101) is mounted on the other end of the power shaft (10) and inside the outer shell (1). A connecting rod (102) is rotatably mounted on the turntable (101) via an eccentric shaft. The end of the connecting rod (102) away from the turntable (101) is rotatably connected to the plunger (2) via a universal joint. One-way valves (19) are installed on the upper and lower sides of the outer shell (1) and corresponding to the working chamber (11).

6. The hydraulic power unit of the plunger pump according to claim 2, characterized in that: An annular groove (18) is provided on the outer shell (1) and on the rear side of the plate (7), and a sealing ring (9) is installed on the outer shell (1) through the annular groove (18).

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