CN215595806U

CN215595806U - Quantitative high-pressure plunger pump

Info

Publication number: CN215595806U
Application number: CN202121945421.3U
Authority: CN
Inventors: 王巧扣; 赵启东; 刘亚男
Original assignee: Zhejiang Baishi Ruipawa Drive Co ltd
Current assignee: Zhejiang Baishi Ruipawa Drive Co ltd
Priority date: 2021-08-18
Filing date: 2021-08-18
Publication date: 2022-01-21
Anticipated expiration: 2031-08-18

Abstract

A quantitative high-pressure plunger pump comprises a shell, an installation cavity arranged in the shell, an input shaft arranged in the installation cavity in a penetrating mode, an output shaft arranged in the installation cavity in a penetrating mode and forming an included angle with the length direction of the input shaft, an inclined meshing structure arranged between the input shaft and the output shaft, an elastic stable structure arranged between the input shaft and the output shaft, and a plunger driving structure arranged between the input shaft and the output shaft. The plunger driving structure comprises a pump oil cavity arranged on one side of the output shaft along the length direction of the output shaft, an oil inlet arranged on the shell and communicated with the pump oil cavity, a plunger penetrating the pump oil cavity, and a limit groove arranged at one end of the input shaft close to the output shaft. The quantitative high-pressure plunger pump ensures the stability of the plunger in the pump oil cavity, and further increases the stability of oil pumping operation and the accuracy of oil pumping quantity.

Description

Quantitative high-pressure plunger pump

Technical Field

The utility model belongs to the technical field of plunger pumps, and particularly relates to a quantitative high-pressure plunger pump.

Background

The plunger pump is an important device of the hydraulic system. Plunger pumps are widely used in applications where high pressure, high flow and flow needs to be regulated, such as hydraulic machines, engineering machinery and ships. The plunger reciprocates in the cylinder body to change the volume of the sealed working cavity so as to absorb and press oil. The plunger pump has the advantages of high rated pressure, compact structure, high efficiency, convenient flow regulation and the like.

The existing plunger pump directly drives the plunger to move through an eccentric wheel on a driving input shaft, the plunger pump is provided with a radial end part, the circumferential outer wall is stressed in multiple directions, the long-term stability of the plunger is poor, the discharge capacity cannot be accurately controlled, the whole occupied space of the equipment is large, and the installation is inconvenient.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention provides a quantitative high-pressure plunger pump to solve the above problems.

A quantitative high-pressure plunger pump comprises a shell, an installation cavity arranged in the shell, an input shaft arranged in the installation cavity in a penetrating mode, an output shaft arranged in the installation cavity in a penetrating mode and forming an included angle with the length direction of the input shaft, an inclined meshing structure arranged between the input shaft and the output shaft, an elastic stable structure arranged between the input shaft and the output shaft, and a plunger driving structure arranged between the input shaft and the output shaft. The plunger driving structure comprises a pump oil cavity arranged on one side of the output shaft along the length direction of the output shaft, an oil inlet arranged on the shell and communicated with the pump oil cavity, a plunger penetrating the pump oil cavity, a limiting groove arranged at one end, close to the output shaft, of the input shaft, and a limiting ball block arranged at one end, close to the input shaft, of the plunger and correspondingly embedded into the limiting groove.

Furthermore, an input port is arranged at one end of the shell close to the input shaft, and one end of the input shaft extends out of the input port.

Furthermore, an input bearing embedded in the mounting cavity is sleeved on the outer side of the input shaft.

Furthermore, an output port is formed in one end, close to the output shaft, of the shell, and the output port is connected with an end cover for closing the output port.

Further, the included angle formed by the length direction of the input shaft and the length direction of the output shaft is between 110 and 160 degrees.

Further, the oblique meshing structure comprises a gear ring connected to the outer side of one end, close to the output shaft, of the input shaft, and a tooth portion arranged at one end, close to the input shaft, of the output shaft and connected with the gear ring in an oblique meshing mode.

Furthermore, the elastic stabilization structure comprises a yielding hole, a fixing column, a mounting hole, an adjusting sleeve, an annular convex shoulder and a spring, wherein the yielding hole is formed in the middle of one end, close to the input shaft, of the output shaft, the fixing column is embedded in the yielding hole, the mounting hole is formed in the middle of one end, close to the output shaft, of the input shaft, the adjusting sleeve is sleeved on the outer side of the fixing column, one end of the adjusting sleeve is abutted to the mounting hole, the annular convex shoulder is arranged on the outer wall of the adjusting sleeve, and the spring is arranged between the annular convex shoulder and the fixing column.

Furthermore, a sealing ring sleeved on the outer side of the input shaft is embedded in the input port.

Compared with the prior art, the quantitative high-pressure plunger pump provided by the utility model has the advantages that the plunger driving structure is matched with the oblique meshing structure, the input shaft and the output shaft are kept to synchronously rotate in different directions, the radial stress of the plunger is reduced, the stability of the plunger in the pump oil cavity is ensured, the rotation reliability of the input shaft and the output shaft is ensured through the elastic stable structure, and the stability of oil pumping operation and the accuracy of oil pumping quantity are further improved.

Drawings

Fig. 1 is a schematic structural diagram of a quantitative high-pressure plunger pump provided by the utility model.

Fig. 2 is an enlarged structural view of a region a of the constant-volume high-pressure plunger pump of fig. 1.

Fig. 3 is a schematic view of an end cap structure of the constant-volume high-pressure plunger pump of fig. 1.

Detailed Description

Specific examples of the present invention will be described in further detail below. It should be understood that the description herein of embodiments of the utility model is not intended to limit the scope of the utility model.

Fig. 1 to fig. 3 are schematic structural diagrams of a quantitative high-pressure plunger pump according to the present invention. A quantitative high-pressure plunger pump comprises a shell 10, wherein an installation cavity 11 is arranged in the shell 10, an input port 131 and an output port 141 are respectively arranged at two ends of the installation cavity 11, an input shaft 13 penetrates through the installation cavity 11 from the input port 131, an output shaft 14 which forms an included angle with the length direction of the input shaft 13 is further arranged in the installation cavity 11, the input shaft 13 is connected with the output shaft 14 through an oblique meshing structure 20, and an elastic stable structure 30 and a plunger driving structure 40 are arranged between the input shaft 13 and the output shaft 14. It is contemplated that the constant-pressure plunger pump may further include other functional components and specific structures, such as electrical connections, seals, mounting structures, etc., which are well known to those skilled in the art, and thus will not be described in detail herein.

The included angle formed by the length direction of the input shaft 13 and the length direction of the output shaft 14 is 110-160 degrees, the section of the installation cavity 11 is L-shaped, and the structure of the inner cavity is consistent with the connecting structure of the input shaft 13 and the output shaft 14, so that the installation structure is more compact. One end of the input shaft 13 extends out of the input port 131 and is connected with an external driving structure to input power.

An input bearing 14 embedded in the mounting cavity 11 is sleeved on the outer side of the input shaft 13, and the input bearing 14 is arranged between the mounting cavity 11 and the input shaft 13. The input shaft 13 can be kept in smooth relative rotation in the mounting chamber 11. The input port 131 is embedded with a sealing ring 15 sleeved on the outer side of the input shaft 13, and the sealing ring 15 is used for enhancing the sealing property of the installation cavity 11

The end of the housing 10 near the output shaft 14 is provided with an end cap 16 for closing the output port 141, and one end of the output shaft 14 is connected to the end cap 16 for stabilizing the structure and keeping relative rotation with the end cap 16.

The inclined meshing structure 20 includes a ring gear 21 connected to an outer side of an end of the input shaft 13 close to the output shaft 14, and a tooth portion 22 provided at an end of the output shaft 14 close to the input shaft 13 and meshing-connected to the ring gear 21 in an inclined manner. One side of the tooth part 22 extends into the gear ring 21 to form an angular rotary connection after meshing, and the output shaft 14 synchronously rotates in the reverse direction through the rotary input of the input shaft 13.

The plunger driving structure 40 includes a pumping chamber 41 disposed at one side of the output shaft 14 along the length direction of the output shaft 14, an oil inlet 42 disposed in the housing 10 and communicated with the pumping chamber 41, oil enters and exits the pumping chamber 41 through the oil inlet 42, a plunger 43 is disposed in the pumping chamber 41 and one end of the plunger 43 forms a single-side seal with the pumping chamber 41, a limit groove 44 corresponding to the pumping chamber 41 is disposed at one end of the input shaft 13 close to the output shaft 14, when the input shaft 13 and the output shaft 14 rotate in different directions synchronously, the limit groove 44 is always aligned with the pumping chamber 41, a limit ball block 45 correspondingly embedded in the limit groove 44 is disposed at one end of the plunger 43 close to the input shaft 13, the plunger 43 is movably connected with the limit groove 44 through the limit ball block 45, and the end of the plunger 43 connected with the input shaft 13 can rotate universally, conceivably, a spherical bushing can be fixed in the limit groove 44, one end of the plunger 43 extends into the spherical sleeve to form a universal rotary connection. The length of the plunger 43 is longer than the maximum distance between the stopper groove 44 and the pump oil chamber 41 during rotation, so that one end of the plunger 43 does not separate from the pump oil chamber 41. Meanwhile, in the rotation process of the input shaft 13 and the output shaft 14, the distance between the limiting groove 44 and the pump oil chamber 41 is gradually changed, the position of one end of the plunger 43 in the pump oil chamber 41 is continuously changed, the effective volume of the pump oil chamber 41 is changed, and the oil suction and pressurization output operation in the pump oil chamber 41 is completed.

The elastic stabilizing structure 30 comprises a yielding hole 31 arranged in the middle of one end, close to the input shaft 13, of the output shaft 14, a fixing column 32 embedded in the yielding hole 31, a mounting hole 33 arranged in the middle of one end, close to the output shaft 14, of the input shaft 13, an adjusting sleeve 34 which is sleeved on the outer side of the fixing column 32 and one end of which abuts against the mounting hole 33, an annular shoulder 35 arranged on the outer wall of the adjusting sleeve 34, and a spring 36 arranged between the annular shoulder 35 and the fixing column 32. The spring 36 is squeezed between the annular shoulder 35 and the fixed column 32, so that the adjusting sleeve 34 is forced to correspondingly abut against the center of one end of the input shaft 13, the fixed column 32 is arranged at the center of one end of the output shaft 14, and the fixed column 32 and the output shaft 14 correspond to each other, so that the rotation reliability of the input shaft 13 and the output shaft 14 is ensured.

According to the quantitative high-pressure plunger pump provided by the utility model, the plunger driving structure 40 is matched with the inclined meshing structure 20, so that the input shaft 13 and the output shaft 14 keep synchronous and opposite rotation, the radial stress of the plunger 43 is reduced, the stability of the plunger 43 in the pump oil cavity 41 is ensured, the rotation reliability of the input shaft 13 and the output shaft 14 is ensured through the elastic stabilizing structure 30, and the stability of oil pumping operation and the accuracy of oil pumping quantity are further improved.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, and any modifications, equivalents or improvements that are within the spirit of the present invention are intended to be covered by the following claims.

Claims

1. A quantitative high-pressure plunger pump is characterized in that: the quantitative high-pressure plunger pump comprises a shell, an installation cavity arranged in the shell, an input shaft penetrating in the installation cavity, an output shaft penetrating in the installation cavity and forming an included angle with the length direction of the input shaft, an oblique meshing structure arranged between the input shaft and the output shaft, and an elastic stable structure arranged between the input shaft and the output shaft, and a plunger driving structure arranged between the input shaft and the output shaft, the plunger driving structure comprises a pump oil cavity arranged at one side of the output shaft along the length direction of the output shaft, an oil inlet arranged in the shell and communicated with the pump oil cavity, a plunger penetrating in the pump oil cavity, and a limit groove arranged at one end of the input shaft close to the output shaft, and the limiting ball block is arranged at one end of the plunger close to the input shaft and is correspondingly embedded into the limiting groove.

2. The quantitative high pressure plunger pump according to claim 1, wherein: an input port is arranged at one end of the shell close to the input shaft, and one end of the input shaft extends out of the input port.

3. The quantitative high pressure plunger pump according to claim 1, wherein: and an input bearing embedded in the mounting cavity is sleeved on the outer side of the input shaft.

4. The quantitative high pressure plunger pump according to claim 1, wherein: one end of the shell, which is close to the output shaft, is provided with an output port, and the output port is connected with an end cover for closing the output port.

5. The quantitative high pressure plunger pump according to claim 1, wherein: the included angle formed by the length direction of the input shaft and the length direction of the output shaft is between 110 and 160 degrees.

6. The quantitative high pressure plunger pump according to claim 1, wherein: the oblique meshing structure comprises a gear ring connected to the outer side of one end, close to the output shaft, of the input shaft and a tooth portion arranged at one end, close to the input shaft, of the output shaft and connected with the gear ring in an oblique meshing mode.

7. The quantitative high pressure plunger pump according to claim 1, wherein: the elastic stabilizing structure comprises a yielding hole, a fixed column, a mounting hole, an adjusting sleeve, an annular convex shoulder and a spring, wherein the yielding hole is formed in the middle of one end, close to the input shaft, of the output shaft, the fixed column is embedded in the yielding hole, the mounting hole is formed in the middle of one end, close to the output shaft, of the input shaft, the adjusting sleeve is sleeved on the outer side of the fixed column, one end of the adjusting sleeve is abutted to the mounting hole, the annular convex shoulder is arranged on the outer wall of the adjusting sleeve, and the spring is arranged between the annular convex shoulder and the fixed column.

8. The quantitative high pressure plunger pump according to claim 1, wherein: and a sealing ring sleeved on the outer side of the input shaft is embedded in the input port.