CN214064543U

CN214064543U - Rotor type oil pump with rotor shaft not prone to abrasion

Info

Publication number: CN214064543U
Application number: CN202022349482.5U
Authority: CN
Inventors: 魏水源; 李成
Original assignee: Nanjing Jiayuan Technology Equipment Manufacturing Co ltd
Current assignee: Nanjing Jiayuan Technology Equipment Manufacturing Co ltd
Priority date: 2020-10-20
Filing date: 2020-10-20
Publication date: 2021-08-27
Anticipated expiration: 2030-10-20

Abstract

The utility model discloses a rotor formula oil pump of difficult wearing and tearing of rotor shaft, including casing, inner rotor, external rotor and pump cover, the external rotor setting is in the casing, and the inner rotor setting is in the external rotor, and the inner rotor is connected with the rotor shaft, the position that the rotor shaft is connected with the casing is equipped with the step, and the step middle part is equipped with the oil feed tank, is equipped with the fuel feeding way of being connected with the oil feed tank in the rotor shaft, and the other end of fuel feeding way is connected to the outside of rotor shaft. The utility model discloses a set up step and fuel feeding tank on the rotor shaft, lubricate and cool down the rotation of rotor shaft to reduce the wearing and tearing of alleviating the rotor shaft and the condition such as cavitation, improve the life of oil pump.

Description

Rotor type oil pump with rotor shaft not prone to abrasion

Technical Field

The utility model relates to an oil pump technical field, in particular to rotor formula oil pump of difficult wearing and tearing of rotor shaft.

Background

The rotor type oil pump comprises a shell, an inner rotor, an outer rotor, a pump cover and the like. The inner rotor is fixed on the rotor shaft by a key or a pin and is directly or indirectly driven by a crankshaft gear, the eccentricity at the centers of the inner rotor and the outer rotor is e, and the inner rotor drives the outer rotor to rotate together along the same direction.

A rotor shaft of a common oil pump product in the market is usually a smooth shaft and is respectively contacted with a pump cover and a shell, and the rotor shaft is subjected to large radial force during working, so that the rotor shaft is easy to wear after long-term working.

SUMMERY OF THE UTILITY MODEL

The utility model provides a rotor formula oil pump of difficult wearing and tearing of rotor shaft, its advantage is difficult wearing and tearing of rotor shaft, and life is longer.

The above object of the utility model is realized through following technical scheme, a rotor formula oil pump of difficult wearing and tearing of rotor shaft, including casing, inner rotor, outer rotor and pump cover, the outer rotor setting is in the casing, and the inner rotor setting is in the outer rotor, and the inner rotor is connected with the rotor shaft, the position that the rotor shaft is connected with the casing is equipped with the step, and the step middle part is equipped with the oil feed tank, is equipped with the fuel feeding way of being connected with the oil feed tank in the rotor shaft, and the other end of fuel feeding way is connected to the outside of rotor shaft.

According to the technical scheme, the oil supply channel is used for being connected with the engine oil pipeline, engine oil can enter the oil supply groove from the outside through the oil supply channel, and engine oil in the oil supply groove can form oil buns on the step surface of the rotor shaft, so that the rotor shaft is lubricated and cooled in rotation, the conditions of abrasion, cavitation erosion and the like of the rotor shaft are relieved, and the service life of the engine oil pump is prolonged.

The utility model discloses further set up to, the cross-sectional shape of fuel feeding tank is semi-circular.

Through above-mentioned technical scheme, the influence of oil feed groove furthest's reduction minimum rotor shaft structural strength, the difficult phenomenon that produces stress concentration of rotor shaft in oil feed groove department.

To sum up, the beneficial effects of the utility model are that:

1. the steps and the oil supply groove are arranged on the rotor shaft, so that the rotation of the rotor shaft is lubricated and cooled, the conditions of abrasion, cavitation erosion and the like of the rotor shaft are reduced and relieved, and the service life of the oil pump is prolonged;

2. the diameter of the step of the rotor shaft is larger, and the section of the oil supply groove is arc-shaped, so that the influence of the structural strength of the rotor shaft at the most of the oil supply groove is reduced.

Drawings

FIG. 1 is an exploded view of the structure of the present embodiment;

FIG. 2 is a schematic structural view of a rotor shaft in the present embodiment;

fig. 3 is a sectional view of the rotor shaft in the present embodiment.

In the figure, 1, a housing; 2. an inner rotor; 3. an outer rotor; 4. a pump cover; 5. a rotor shaft; 501. a step; 502. an oil supply tank; 503. an oil supply passage.

Detailed Description

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings.

Example (b): referring to fig. 1-3, a rotor type oil pump with a rotor shaft not prone to wear comprises a shell 1, an inner rotor 2, an outer rotor 3 and a pump cover 4, wherein the outer rotor 3 is arranged in the shell 1, the inner rotor 2 is arranged in the outer rotor 3, the inner rotor 2 is connected with the rotor shaft 5, and the shell 1, the inner rotor 2, the outer rotor 3 and the pump cover 4 are all designed in the prior art and are not particularly described herein. A step 501 is arranged at the position where the rotor shaft 5 is connected with the housing 1, the diameter of the step 501 is larger than that of the rotor shaft 5, an oil supply groove 502 is arranged in the middle of the step 501, an oil supply channel 503 connected with the oil supply groove 502 is arranged in the rotor shaft 5, and the other end of the oil supply channel 503 is connected to the outer side of the rotor shaft 5. The oil supply channel 503 is used for connecting an engine oil pipeline, engine oil can enter the oil supply groove 502 from the outside through the oil supply channel 503, and engine oil in the oil supply groove 502 can form oil buns on the surface of the step 501 of the rotor shaft 5, so that the effects of lubricating and cooling the rotation of the rotor shaft 5 are achieved, the conditions of abrasion, cavitation erosion and the like of the rotor shaft 5 are relieved, and the service life of the engine oil pump is prolonged.

The oil supply groove 502 has a semicircular sectional shape. Oil supply groove 502 minimizes the influence of the structural strength of rotor shaft 5, and rotor shaft 5 is less likely to have a stress concentration phenomenon in oil supply groove 502.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, many modifications and improvements can be made without departing from the inventive concept, and all of them belong to the protection scope of the present invention.

Claims

1. The utility model provides a rotor formula oil pump of difficult wearing and tearing of rotor shaft, includes casing (1), inner rotor (2), outer rotor (3) and pump cover (4), and outer rotor (3) set up in casing (1), and inner rotor (2) set up in outer rotor (3), and inner rotor (2) are connected with rotor shaft (5), its characterized in that, the position that rotor shaft (5) and casing (1) are connected is equipped with step (501), and step (501) middle part is equipped with fuel feeding tank (502), is equipped with in rotor shaft (5) and supplies oil duct (503) of being connected with fuel feeding tank (502), and the other end of fuel feeding duct (503) is connected to the outside of rotor shaft (5).

2. The rotor type oil pump of claim 1, wherein the cross-sectional shape of the oil supply groove (502) is a semicircle.