CN217464008U

CN217464008U - Oil inlet bushing

Info

Publication number: CN217464008U
Application number: CN202122939857.8U
Authority: CN
Inventors: 刘景平; 胡小龙; 邢孔将
Original assignee: Guangzhou Qinling Vehicle Technology Science & Tech Co ltd
Current assignee: Guangzhou Qinling Vehicle Technology Science & Tech Co ltd
Priority date: 2021-11-24
Filing date: 2021-11-24
Publication date: 2022-09-20
Anticipated expiration: 2031-11-24

Abstract

The utility model belongs to connect the field, it discloses an oil feed bush, including annular bush body, be equipped with at least one oil inlet that runs through the lateral wall of bush body on the bush body, the inboard of bush body is equipped with the first screw thread and the second screw thread that use the axle center of bush body as the center that are located oil inlet both sides, the spiral opposite direction of first screw thread and second screw thread. The first thread and the second thread are arranged on the inner side of the oil inlet bushing, and the directions of the first thread and the second thread are opposite, so that oil can be guided into the oil inlet in the process of high-speed rotation of the shaft, high-pressure oil cannot leak into the bearing and the oil seal from the space between the shaft and the oil inlet bushing, and the purpose of high-pressure oil injection is achieved.

Description

Oil inlet bushing

Technical Field

The utility model relates to a connect the field, specifically be an oil feed bush.

Background

CN201510205671.6 discloses a high-pressure high-speed double-channel rotary joint, including the flange rotation axis, circlip for the hole, hole use combination retaining ring support cover, hole use combination retaining ring snap ring, thrust ball bearing, spacer, glib talker, deep groove ball bearing, axle are with the snap ring, axle are with circlip, first combination sealing washer, second screw thread route, second combination sealing washer, casing, fourth screw thread route, the screw hole that splines, third screw thread route, first screw thread route, its characterized in that: the hole elastic check ring, the hole combined check ring support sleeve and the hole combined check ring clamping ring are sequentially arranged in the shell, the outer ring of the thrust ball bearing is fixedly arranged in the shell, the inner ring of the thrust ball bearing is fixedly embedded on the flange rotating shaft, and the separation sleeve is arranged between the inner ring of the thrust ball bearing and the inner ring of the deep groove ball bearing.

It can be seen that the nozzle tip is fixed on the shell, but in the actual production process, the aim of high-pressure oil injection is obviously not achieved if the sealing is only carried out through the bearings on two sides.

To fill oil into a shaft rotating at high speed, an oil inlet bushing with high sealing performance is required to be selected.

It is not possible for almost any bushing to achieve a complete seal under high speed, high pressure conditions.

The technical problem that this application was solved is: how to improve the leakproofness of oil feed bush to high-pressure oil avoids oil to reveal in the bearing from between axle, the oil feed bush.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an oil feed bush sets up first screw thread and second screw thread in the inboard of oil feed bush to make both opposite directions, carry out high-speed pivoted in-process at the axle like this, can lead-in the oil inlet with oil, make high-pressure oil can not reveal bearing, oil blanket between from the axle, the oil feed bush in, realize the purpose of high-pressure oiling.

Simultaneously, have the clearance by first screw thread and second screw thread formation between oil feed bush and the axle, can form the oil film at this in-process, the oil film can play supplementary sealed and lubricated effect, can reach the purpose that the oil was carried to the high pressure.

In order to achieve the above purpose, the utility model provides a following technical scheme: the oil inlet bushing comprises an annular bushing body, wherein at least one oil inlet penetrating through the side wall of the bushing body is formed in the bushing body, first threads and second threads which are located on two sides of the oil inlet and take the axis of the bushing body as the center are arranged on the inner side of the bushing body, and the spiral directions of the first threads and the second threads are opposite.

In the oil inlet bush, a first oil guide groove is formed in the outer side of the bush body, and one end of the oil inlet is located in the first oil guide groove.

In the oil inlet bush, a second oil guide groove is formed in the inner side of the bush body, and the other end of the oil inlet is located in the second oil guide groove.

In the oil inlet bush, the number of the oil inlets is 2, and the oil inlets are symmetrically arranged on the side wall of the bush body.

In the oil inlet bush, the number of the oil inlets is 4, and the oil inlets are uniformly arranged on the side wall of the bush body.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses compare the conventional art, through the transformation to the oil feed bush, set up first screw thread and second screw thread in the inboard of oil feed axle sleeve to make both opposite directions, carry out high-speed pivoted in-process at the axle like this, can lead to the third oil inlet with oil, make high-pressure oil not enter into bearing, oil blanket in, realize the purpose of high-pressure oiling.

Simultaneously, have the clearance by first screw thread and second screw thread formation between oil feed axle sleeve and the axle, can form the oil film at this in-process, the oil film can play supplementary sealed and lubricated effect, can reach the purpose that the oil was carried to the high pressure.

Drawings

Fig. 1 is a front view of embodiment 1 of the present invention;

fig. 2 is a sectional view of embodiment 1 of the present invention;

fig. 3 is an enlarged view of a part C of fig. 2 according to embodiment 1 of the present invention;

fig. 4 is a schematic view of the embodiment 1 of the present invention and the shaft.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.

Example 1

As shown in fig. 1-4, an oil inlet bushing includes an annular bushing body 1, the bushing body 1 is provided with 4 oil inlets 2 penetrating through a side wall of the bushing body 1, the 4 oil inlets 2 are uniformly arranged on the side wall of the bushing body 1, the inner side of the bushing body 1 is provided with a first thread 3 and a second thread 4 which are located at two sides of the oil inlet 2 and take an axis of the bushing body 1 as a center, and spiral directions of the first thread 3 and the second thread 4 are opposite.

In the use, the oil feed bush cup joints epaxial, is equipped with the high pressure oil duct in the axle, and at the rotation in-process of axle, because have the oil film between the inside wall of axle and bush body 1, can produce the guiding force to oil, the helical direction of first screw thread 3 and second screw thread 4 will be according to the rotation direction setting of axle, under the condition of axle corotation, with the leading-in oil to oil inlet 2 between bush body 1 and the axle.

That is, the pitch of the first thread 3 and the second thread 4 of the present embodiment is designed according to the operating condition, the higher the oil pressure and the lower the rotation speed, the smaller the pitch should be, for example, under the condition of oil pressure of 20MPa and 1500r/min, we propose the pitch of 0.8-1 mm.

The pitch determination algorithm may employ the following algorithm:

L＝N*(P*N/1000)^ ^1/3 /(Φ*100)；

l: is the pitch, unit mm;

phi is the diameter of the rotating shaft, unit: mm;

p: the rated working pressure of the system is in MPa;

n: is the rated working speed and has the unit of rotation/minute.

The design requirement of the first thread 3 and the second thread 4 of the present embodiment is that the pressure generated to the oil film during the relative rotation between the shaft and the bushing body 1 should be greater than the oil feed pressure.

Preferably, the outside of bush body 1 is equipped with first oil guide groove 5, the one end of oil inlet 2 is located first oil guide groove, the inboard of bush body 1 is equipped with second oil guide groove 6, the other end of oil inlet 2 is located second oil guide groove 6.

Fig. 4 shows a schematic diagram of the sleeving fit of the oil inlet bush and the shaft 7, the bearing 8 and the oil seal 9 are arranged on two sides, and the rotation of the shaft can enable the oil discharge pressure of an oil film generated at the positions of the first thread 3 and the second thread 4 of the oil inlet bush to be larger than the oil filling pressure of the oil inlet, so that high-pressure oil is prevented from entering the bearing and the oil seal.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The oil inlet bushing comprises an annular bushing body, wherein at least one oil inlet penetrating through the side wall of the bushing body is formed in the bushing body, and the oil inlet bushing is characterized in that a first thread and a second thread which are located on two sides of the oil inlet and take the axis of the bushing body as the center are arranged on the inner side of the bushing body, and the spiral directions of the first thread and the second thread are opposite.

2. The oil inlet bushing of claim 1, wherein a first oil guide groove is formed in the outer side of the bushing body, and one end of the oil inlet is located in the first oil guide groove.

3. The oil inlet bushing of claim 1, wherein a second oil guide groove is formed in the inner side of the bushing body, and the other end of the oil inlet is located in the second oil guide groove.

4. The oil inlet bushing of claim 1, wherein the number of oil inlets is 2 and the oil inlets are symmetrically arranged on the side wall of the bushing body.

5. The oil inlet bushing of claim 1, wherein the number of oil inlets is 4 and the oil inlets are evenly arranged on the side wall of the bushing body.