Multi-outlet gear pump
By setting the gear shaft with the end face oil cavity and shaft hole in the gear pump, the problems of poor lubrication effect and high production cost in the power output shaft in the prior art are solved, and efficient lubrication and stable operation are achieved.
Patent Information
- Application Number
- CN202421178268.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-28
- Publication Date
- 2025-01-07
- Estimated Expiration
- 2034-05-28
AI Technical Summary
Existing gear pumps require external lubrication pipelines when driving the power output shaft, resulting in poor lubrication effect. In order to prevent excessive oil pressure from increasing pressure relief components, increasing production costs.
Design a multi-outlet gear pump. By setting the gear shaft with the end face oil cavity and shaft hole in the pump body, lubrication of the power output shaft is achieved, avoiding peripheral lubrication pipelines, and reducing the demand for pressure relief components through the oil drainage branch design. .
It realizes efficient lubrication of the power output shaft, reduces the equipment installation cost, avoids the lubricant oil being thrown out by rotating motion, and ensures the stable operation of the gear pump.
Smart Images
Figure CN222315361U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of gear pumps, in particular to a multi-outlet gear pump. Background Art
[0002] A gear pump is a rotary pump that relies on the change and movement of the working volume formed between the pump cylinder and the meshing gears to transport liquid or increase its pressure. Gear pumps are often used in mechanical lubrication systems to supply lubricating oil to parts that need lubrication.
[0003] Since the power output shaft (such as the motor output shaft) driving the gear pump has a large load, it also needs to be lubricated during operation. Currently, a pipeline is mainly separated from the oil outlet chamber of the gear pump to provide lubrication for the power output shaft. Since the power output shaft rotates during operation, oil spraying from the outside requires another oil circuit to be set up, and the oil sprayed from the outside to the transmission shaft will be thrown out by the rotating motion, and the ideal lubrication effect cannot be achieved; in addition, in order to avoid excessive oil pressure in the gear pump and damage to the components, the existing gear pump also needs to add a pressure relief port and a pressure relief component inside it, which increases the production cost of the gear pump. Therefore, a multi-outlet gear pump is needed to solve the above problems. Utility Model Content
[0004] The purpose of the utility model is to provide a multi-outlet gear pump to solve the problems existing in the prior art mentioned in the above background technology.
[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0006] A multi-outlet gear pump comprises a pump body, a pump seat and a pump cover, wherein the pump seat and the pump cover are respectively mounted on the front and rear end surfaces of the pump body, an oil inlet and an oil inlet cavity are arranged inside one end of the pump seat, an oil outlet and an oil outlet cavity are arranged at the other end of the pump seat, a gear oil delivery assembly and a gear shaft for driving the gear oil delivery assembly to rotate are arranged inside the pump body, an end face oil cavity is arranged in the middle of the pump seat, the end face oil cavity is communicated with the oil outlet cavity through a through hole, an axial hole is arranged inside the gear shaft, and one end of the axial hole is communicated with the end face oil cavity.
[0007] Preferably, the gear oil delivery assembly comprises an internal gear and an external gear, wherein the internal gear is mounted on the inner wall of the pump body, and the external gear is disposed at a middle position of the internal gear and is keyed to the gear shaft.
[0008] Preferably, the oil inlet and the oil outlet are arranged on the same straight line.
[0009] Compared with the prior art, the beneficial effects of the utility model are:
[0010] The utility model can realize the lubrication of the power output shaft from the inside of the gear pump through the arrangement of the end surface oil cavity and the gear shaft with the shaft hole, without the need for an external lubrication pipeline, thus reducing the equipment installation cost and avoiding the occurrence of the lubricating oil being thrown out by the rotational movement, thereby improving the lubrication effect of the power output shaft. At the same time, through the design of the oil discharge branch path, there is no need to add an additional pressure relief component, thereby ensuring the stable operation of the gear pump. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 It is a schematic diagram of the overall structure of the utility model.
[0012] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model.
[0013] Figure 3 It is a schematic diagram of the internal structure of the pump seat of the utility model.
[0014] In the figure: 1. pump body; 2. pump seat; 21. oil inlet; 22. oil inlet chamber; 23. oil outlet; 24. oil outlet chamber; 25. end face oil chamber; 26. through hole; 3. pump cover; 4. gear shaft; 41. shaft hole; 5. internal gear; 6. external gear. DETAILED DESCRIPTION
[0015] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.
[0016] See also Figure 1-3 , the utility model provides the following technical solutions:
[0017] A multi-outlet gear pump comprises a pump body 1, a pump seat 2 and a pump cover 3. The pump seat 2 and the pump cover 3 are respectively mounted on the front and rear end surfaces of the pump body 1. An oil inlet 21 and an oil inlet cavity 22 are provided inside one end of the pump seat 2, and an oil outlet 23 and an oil outlet cavity 24 are provided at the other end of the pump seat 2. The oil inlet 21 and the oil outlet 23 are arranged on the same straight line. This arrangement can reduce the resistance to the transportation of lubricating oil in the gear pump.
[0018] The pump body 1 is provided with a gear oil delivery assembly and a gear shaft 4 for driving the gear oil delivery assembly to rotate. The gear oil delivery assembly includes an internal gear 5 and an external gear 6. The internal gear 5 is mounted on the inner wall of the pump body 1. The external gear 6 is arranged at the middle position of the internal gear 5 and is keyed to the gear shaft 4. The shaft centers of the internal gear 5 and the external gear 6 are eccentrically arranged. When the external gear 6 rotates, it cooperates with the internal gear 5 to change the working volume in the pump body 1, thereby realizing the delivery of lubricating oil.
[0019] An end face oil chamber 25 is provided in the middle of the pump seat 2, and the end face oil chamber 25 is connected with the oil outlet chamber 24 through a through hole 26. An axial hole 41 is provided inside the gear shaft 4, and one end of the axial hole 41 is connected with the end face oil chamber 25. The lubricating oil can be discharged not only from the oil outlet 23, but also from the axial hole 41. The lubricating oil discharged from the axial hole 41 can lubricate the power output shaft and can reduce the oil delivery pressure in the pump body 1.
[0020] The working process of the utility model is as follows:
[0021] First, the gear pump is installed, the oil inlet 21 is connected to the lubricating oil tank through a pipeline, and then the oil outlet 23 is connected to the oil delivery port of the mechanical part to be lubricated through a pipeline, and the gear shaft 4 is connected to the power output shaft of the power equipment by a coupling, and the shaft hole 41 of the gear shaft 4 is connected to the internal hole of the power output shaft.
[0022] After starting the power equipment, the power output shaft of the power equipment drives the gear shaft 4 to rotate, and the gear shaft 4 drives the external gear 6 to rotate. The external gear 6 cooperates with the internal gear 5 to suck the lubricating oil into the oil inlet chamber 22, and enters the oil outlet chamber 24 through the pump body 1. The lubricating oil in the oil outlet chamber 24 is discharged from the oil outlet 23 under the action of pressure and transported to the mechanical parts for lubrication. The lubricating oil in the oil outlet chamber 24 also enters the end face oil chamber 25 through the through hole 26. The lubricating oil in the end face oil chamber 25 enters the power output shaft through the shaft hole 41, supplies lubricating oil to the power output shaft, and realizes internal lubrication of the power output shaft.
[0023] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A multi-outlet gear pump, comprising a pump body (1), a pump seat (2) and a pump cover (3), wherein the pump seat (2) and the pump cover (3) are respectively mounted on the front and rear end surfaces of the pump body (1), an oil inlet (21) and an oil inlet cavity (22) are arranged inside one end of the pump seat (2), and an oil outlet (23) and an oil outlet cavity (24) are arranged at the other end of the pump seat (2), a gear oil delivery assembly and a gear shaft (4) for driving the gear oil delivery assembly to rotate are arranged inside the pump body (1), characterized in that: An end surface oil chamber (25) is provided in the middle of the pump seat (2), and the end surface oil chamber (25) is connected to the oil outlet chamber (24) through a through hole (26). An axial hole (41) is provided inside the gear shaft (4), and one end of the axial hole (41) is connected to the end surface oil chamber (25).
2. A multi-outlet gear pump according to claim 1, characterized in that: The gear oil delivery assembly comprises an internal gear (5) and an external gear (6), wherein the internal gear (5) is mounted on the inner wall of the pump body (1), and the external gear (6) is arranged at the middle position of the internal gear (5) and is key-connected to the gear shaft (4).
3. A multi-outlet gear pump according to claim 1, characterized in that: The oil inlet (21) and the oil outlet (23) are arranged on the same straight line.