CN210371680U

CN210371680U - Sliding shaft sleeve for spaceflight

Info

Publication number: CN210371680U
Application number: CN201921055157.9U
Authority: CN
Inventors: 陈科宇
Original assignee: Yancheng Keyu Machinery Manufacturing Co ltd
Current assignee: Yancheng Keyu Machinery Manufacturing Co ltd
Priority date: 2019-07-08
Filing date: 2019-07-08
Publication date: 2020-04-21
Anticipated expiration: 2029-07-08

Abstract

The utility model discloses a sliding shaft sleeve for aerospace, including outer steel bushing, fixedly connected with supports the cover on the outer steel bushing inside wall, support fixedly connected with endotheca on the inside wall of cover, it is equipped with the oil storage chamber in the cover to support, be equipped with on the lateral wall in oil storage chamber and give oilhole and oil drain hole, sealed sliding connection has two slip rings on the lateral wall in oil storage chamber, the slip ring passes through the lateral wall fixed connection in gasbag and oil storage chamber, the gasbag intussuseption is filled with low boiling evaporation liquid, be equipped with a plurality of recesses on the inside wall of endotheca, the bottom surface of recess is through bullet piece fixedly connected with inner slide. The utility model discloses a set up the oil storage chamber for the storage of lubricating oil, when the axle sleeve high temperature, the lubricating oil of oil storage intracavity is extruded to main shaft and axle sleeve rotation department, reduces wearing and tearing, and simultaneously, outside the ejecting recess of slide in the bullet piece deformation will be, interior slide and main shaft counterbalance contact avoid appearing fit clearance between axle sleeve and the main shaft, have reduced the rate of wear of axle sleeve.

Description

Sliding shaft sleeve for spaceflight

Technical Field

The utility model relates to an aerospace accessory technical field especially relates to a sliding shaft sleeve is used in aerospace.

Background

The shaft sleeve is a cylindrical mechanical part sleeved on the rotating shaft and is a component of the sliding bearing. Generally, a shaft sleeve is in interference fit with a bearing seat and in clearance fit with a shaft, and a sliding shaft sleeve is an important mechanical element for supporting shaft parts, and has relative motion during operation, so that the shaft sleeve is in good lubrication state along with friction and abrasion during operation.

In the long-term operation process of the shaft sleeve, the surface of the shaft neck is subjected to the extrusion force of the expansion sleeve and the action of composite mechanical force, so that the permanent deformation is caused, the diameter is reduced by 0.1mm-0.3mm, the mechanical expansion and tight fit force cannot meet the required tightening force, a fit gap is formed between the shaft sleeve and the main shaft, the abrasion of the shaft sleeve is caused, and the bearing generates heat in high-speed rotation, so that the fit gap between the shaft sleeve and the main shaft is larger and more serious under the action of expansion with heat and contraction with cold, the use of aerospace equipment cannot be met, and the service life of the shaft sleeve is greatly reduced; and under the high temperature running state, the loss speed of lubricating oil is very fast, and the wearing and tearing speed of axle sleeve will accelerate after lubricating oil consumes.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problem that shaft sleeve and main shaft wear more seriously and lubricating oil can not be supplied in time among the prior art, and the aerospace of a stable protection that provides is with sliding shaft sleeve.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a sliding shaft sleeve for aerospace, includes outer steel bushing, fixedly connected with supports the cover on the outer steel bushing inside wall, support fixedly connected with endotheca on the inside wall of cover, it is equipped with the oil storage chamber in the cover to support, be equipped with for oilhole and oil drain hole on the lateral wall in oil storage chamber, sealed sliding connection has two slip rings on the lateral wall in oil storage chamber, the slip ring passes through the gasbag and the lateral wall fixed connection in oil storage chamber, the gasbag intussuseption is filled with low boiling evaporation liquid, be equipped with a plurality of recesses on the inside wall of endotheca, the bottom surface of recess is through slide in bullet piece fixedly connected with.

Preferably, both ends of the support sleeve are fixedly connected with sealing rings, and the sealing rings are fixedly connected with the outer steel sleeve and the inner sleeve.

Preferably, the elastic block is made of a memory metal material, and the memory metal material is a nickel-titanium alloy.

Preferably, the inner sliding plate is arranged in an arc shape.

Preferably, the oil supply hole penetrates through the support sleeve and the outer steel sleeve in sequence and is communicated with the outside, the oil discharge hole penetrates through the support sleeve and the inner sleeve in sequence, and a sealing plug is connected to the side wall of the oil supply hole in a sealing and sliding mode.

Compared with the prior art, the utility model discloses possess following advantage:

1. the utility model discloses a set up the oil storage chamber for the storage of lubricating oil avoids the waste of lubricating oil, when the axle sleeve high temperature, the gasbag inflation promotes the slip ring and removes, extrudes the lubricating oil of oil storage intracavity to main shaft and axle sleeve rotation department, reduces wearing and tearing, has prolonged the life of axle sleeve.

2. The utility model discloses a set up the bullet piece, when the axle sleeve internal temperature is too high, outside the ejecting recess of slide in the bullet piece deformation will be gone out, interior slide and main shaft counterbalance contact avoid appearing the fit clearance between axle sleeve and the main shaft, have reduced the rate of wear of axle sleeve.

Drawings

Fig. 1 is a schematic structural view of a sliding shaft sleeve for aerospace use according to the present invention;

fig. 2 is the utility model provides a side structure schematic diagram of sliding shaft sleeve for spaceflight.

In the figure: the oil-gas separation device comprises an outer steel sleeve 1, a support sleeve 2, an inner sleeve 3, an oil storage cavity 4, an oil supply hole 5, an oil discharge hole 6, a sliding ring 7, an air bag 8, a groove 9, an elastic block 10, an inner sliding plate 11, a sealing ring 12 and a sealing plug 13.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying 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.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Referring to fig. 1-2, a sliding shaft sleeve for aerospace use comprises an outer steel sleeve 1, a support sleeve 2 is fixedly connected to the inner side wall of the outer steel sleeve 1, an inner sleeve 3 is fixedly connected to the inner side wall of the support sleeve 2, it is worth mentioning that the two ends of the support sleeve 2 are fixedly connected with seal rings 12, the seal rings 12 are fixedly connected with the outer steel sleeve 1 and the inner sleeve, and an oil storage cavity 4 is arranged in the support sleeve 2 and used for storing lubricating oil and avoiding the waste of the lubricating oil.

The utility model discloses in, be equipped with on the lateral wall in oil storage chamber 4 and give oilhole 5 and oil drain hole 6, it is required to explain, for oilhole 5 run through in proper order and support cover 2, outer steel bushing 1 and communicate with the outside, oil drain hole 6 runs through in proper order and supports cover 2 and endotheca 3, sealing sliding connection has sealing plug 13 on the lateral wall of oil supply hole 5, sealing sliding connection has two slip rings 7 on the lateral wall in oil storage chamber 4, slip ring 7 passes through the lateral wall fixed connection of gasbag 8 and

oil storage chamber

4, 8 intussuseptions of gasbag are filled with low boiling point evaporating liquid, low boiling point evaporating liquid is the dichloromethane, the boiling point is 39 ℃, when the axle sleeve high temperature, 8 expansions of gasbag promote slip ring 7 and remove, extrude the lubricating oil in the oil storage chamber 4 to main shaft and axle sleeve rotation department, reduce wear, the life of axle.

The utility model discloses in, be equipped with a plurality of recesses 9 on the inside wall of endotheca 3, slide 11 in recess 9's the underrun bullet piece 10 fixedly connected with, interior slide 11 is the cambered surface shape and establishes the laminating main shaft setting, it needs to explain that, bullet piece 10 is made by memory metal material, memory metal material is nickel-titanium alloy, nickel-titanium alloy can the bulging deformation when 40 ℃, when the axle sleeve internal temperature is too high, bullet piece 10 deformation is outside 11 ejecting recess 9 of interior slide, interior slide 11 and main shaft counterbalance contact avoid appearing the fit clearance between axle sleeve and the main shaft, the rate of wear of axle sleeve has been reduced.

The utility model discloses its functional principle is explained to following mode of operation of accessible: when the utility model is used, the sealing plug 13 is opened to inject the lubricating oil into the oil storage cavity 4, so that the waste of the lubricating oil is avoided, when the shaft sleeve works, as the high-speed rotation temperature of the main shaft in the shaft sleeve rises, the low-boiling-point evaporated liquid evaporates, the air bag 8 expands to push the sliding ring 7 to move so as to extrude the lubricating oil in the oil storage cavity 4 to the rotating part of the main shaft and the shaft sleeve, so that the abrasion is reduced, and the service life of the shaft sleeve is prolonged; meanwhile, the elastic block 10 deforms to push the inner sliding plate 11 out of the groove 9, the inner sliding plate 11 is abutted to the main shaft, the matching gap between the shaft sleeve and the main shaft is avoided, and the abrasion speed of the shaft sleeve is reduced.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a sliding shaft sleeve for aerospace, includes outer steel bushing (1), its characterized in that, fixedly connected with supports cover (2) on outer steel bushing (1) inside wall, fixedly connected with endotheca (3) on the inside wall of support cover (2), be equipped with oil storage chamber (4) in supporting cover (2), be equipped with on the lateral wall of oil storage chamber (4) and give oilhole (5) and oil drain hole (6), sealed sliding connection has two slip rings (7) on the lateral wall of oil storage chamber (4), the lateral wall fixed connection of slip ring (7) through gasbag (8) and oil storage chamber (4), gasbag (8) intussuseption is filled with low boiling evaporation liquid, be equipped with a plurality of recesses (9) on the inside wall of endotheca (3), slide (11) in the underrun of recess (9) bullet piece (10) fixedly connected with.

2. A sliding sleeve bushing according to claim 1, wherein the supporting sleeve (2) has sealing rings (12) fixedly connected to both ends, and the sealing rings (12) are fixedly connected to both the outer steel sleeve (1) and the inner sleeve.

3. An aerospace sliding sleeve according to claim 1, wherein the spring block (10) is made of a memory metal material, and the memory metal material is a nickel-titanium alloy.

4. A sliding bushing according to claim 1, wherein the inner slide (11) is cambered.

5. The sliding shaft sleeve for spaceflight as claimed in claim 1, wherein the oil feed hole (5) penetrates through the support sleeve (2) and the outer steel sleeve (1) in sequence and is communicated with the outside, the oil discharge hole (6) penetrates through the support sleeve (2) and the inner sleeve (3) in sequence, and a sealing plug (13) is connected to the side wall of the oil feed hole (5) in a sealing and sliding manner.