CN2886546Y

CN2886546Y - Bearing loading device

Info

Publication number: CN2886546Y
Application number: CN 200620041080
Authority: CN
Inventors: 刘晓华; 李立斋; 何彬峰
Original assignee: Shanghai Institute of Technical Physics of CAS
Current assignee: Shanghai Institute of Technical Physics of CAS
Priority date: 2006-04-14
Filing date: 2006-04-14
Publication date: 2007-04-04
Anticipated expiration: 2016-04-14

Abstract

A bearing loading device comprises a pressing ring, a retainer used for shaft positioning, a support ring, loading screws and a load force sensor, wherein the bearing is placed in the support ring, the loading screws are uniformly distributed on the pressing ring and crossed through the support ring to be screwed with the retainer, the loading force on the bearing is controlled by the loading screw tightness extent on the control pressing ring, the intensity and evenness of the loading force is measured by the loading force sensor. The utility model has the advantages that the bearing can be evenly loaded, and the load offset phenomenon while bearing loading is avoided. The loading force on the bearing can be accurately controlled, and the lubrication life time of the rotation structure is elongated and the bearing friction torque is lowered.

Description

The bearing charger

Technical field

The utility model relates to the bearing in a kind of high precision instrument rotating mechanism, specifically is meant a kind of charger of bearing.

Technical background

Along with the development of Chinese Space technology, the reliability and life-span of useful load on satellite and the star, more harsh requirement was proposed.Rotatable parts are one of vitals on the star, as: the rotating mechanism of the tripper of scanning mechanism in the space remote instrument and modulation rotating mechanism, spoke cooler, the switching of scaler, earth sensor, solar array rotating mechanism or the like.Because it can't back up and change, therefore, the reliability of rotatable parts and life-span directly influence the actual life of useful load on whole star and the star, belong to the single point failure problem.To a certain extent, the fault of moving component is the fault mode that belongs to the success or failure type.

Up to the present, in the spacer remote sensing instrument,, the fault of scanning mechanism is no lack of its number owing to causing the example that total system lost efficacy.A large amount of satellites country of experience is in orbit arranged, also duplicating property fault again and again of the scanning motion parts of remote sensing instrument on its star as the U.S.; ESA (European Space Agency) also once did detail analysis to restriction satellite long-life factor, except battery, run out of gas crucial be exactly that material property fails and the inefficacy of movable part.Simultaneously, domestic also the generation in the recent period about the problem of spatial movement parts in the rail inefficacy, these faults occur after having plenty of emission immediately, have plenty of in phase running life and take place, and have plenty of above taking place after designed life.In a word, seriously restricted the real work life-span of satellite just because of these faults.

Bearing is the kernel component of rotatable parts, and the inefficacy of bearing directly influences the operate as normal of rotatable parts.The use of the rolling bearing that use in any space all must apply certain preload, so both can guarantee the slow-roll stabilization degree of rotatable parts, can make rotation system smoothly by the ground Experiments of Machanics again.The load mode of space application at present comprises: rigidity loads and flexible the loading, but adopts the rigidity loading mostly, and this kind load mode is difficult to the size of concrete control loaded power, tends to cause overload or underloading.The flexible loading can be brought impact injury to bearing when the Experiments of Machanics of ground, produce striking mark in raceway, directly influences the slow-roll stabilization degree of system, thereby influences the image quality of imaging system; If bearing overloading will directly influence the generation of moving component lubricating oil film, especially under space environment, the generation of this situation will make the interior rigidity that takes place of bearing contact, the local high temperature that produces, generation oil firing phenomenon, thereby cause system's lubrication failure, cause the spatial movement component failure.

From another point of view, the measuring accuracy that is used for high precision measuring instrument (as roundness measuring equipment, three-coordinates measuring machine etc.) at present is 0.6～1 μ m, therefore, can't accomplish to load evenly in the actual loaded process, causes the local overload of bearing.

Summary of the invention

The purpose of this utility model be exactly to provide that a kind of space high precision instrument rotating mechanism uses can accurate control loaded power size the bearing charger.

The purpose of this utility model is achieved in that a kind of bearing charger, and described bearing is formed by being filled with packing ring in the middle of the two diagonal angle bearings of placing relatively.Described charger is made up of trim ring, the back-up ring, bracing ring, load screw and the loading force cell that are used for axle location.Bracing ring is made of several sheet metals, and vertical uniform being bolted between trim ring and the back-up ring; Post a loading force cell on every interval 3-4 sheet metal.Bearing places in the bracing ring, and the one end places on the back-up ring, and the other end contacts with trim ring.Load screw is distributed on the trim ring, and passes bracing ring and back-up ring is spirally connected, and screws the loading force of extent control to bearing by the load screw on the control trim ring, and the size of loading force and homogeneity are measured by loading force cell.

The utility model has the advantages that:

Simple in structure, not high to part processing, measurement requirement, avoided in the past measurement and repair to bearing and corresponding construction.

Can evenly load bearing, avoid the unbalance loading phenomenon when bearing loads in the past.

Can the size of the accurate control loaded power of bearing effectively be improved the lubricating life of rotating mechanism and reduce bearing frictional torque.

Description of drawings

Fig. 1 is the three-dimensional mould dress of bearing precision charger figure

Fig. 2 is a charger and cross-sectional view after bearing is connected.

Embodiment

Below in conjunction with accompanying drawing embodiment of the present utility model is described in detail:

A kind of bearing charger of the present utility model is made up of the trim ring 1 that loads as bearing, the back-up ring 2 that is used for the Bearing Installation location, bracing ring 3, load screw 4 and loading force cell 5.Bracing ring is made of several sheet metals 301, and vertical uniform being bolted between trim ring and the back-up ring, and the quantity of sheet metal 301 is determined by the size of bearing, is generally 8-12 according to purposes of the present utility model.Bracing ring is bearing guiding and the support component of measuring bearing pre-fastening.Sheet metal can adopt stainless steel or army's first steel or the memory alloy material that is complementary with bearing material, if adopt memory alloy material, can carry out active adjustment to bearing preload at rail.Every interval 3-4 sheet metal sticks a loading force cell 5, and force cell 5 adopts foil gauge, accurately control loaded power and loading homogeneity.

During the assembling of bearing charger, earlier utilize screw to be assembled together bracing ring 3 and back-up ring 2, on the sheet metal 301 of bracing ring 3, stick and load force cell 5, then two diagonal angle bearings, the 6 staggered relatively and middle washers 7 of filling out are put into bracing ring 3, cover trim ring 1, on trim ring 1, insert load screw 4, and pass bracing ring 3 and be spirally connected with back-up ring 2, screw the size of extent control bearing loading force by control loaded screw 4, by the size and the homogeneity of force cell 5 control loaded power.Axle 8 is finished and is adjusted back taking-up axle, and seal load screw 4 admittedly as bearings mounted frock clamp.Load force cell 5 control accuracies and can reach 0.1 μ ε (strain), after preload applies and finishes, be applied in the rotating mechanism as a bearing assembly.

Claims

1. a bearing charger is filled with packing ring (602) in the middle of the diagonal angle bearings (601) of described bearing (6) by two relative placements and forms; It is characterized in that:

Described charger is made up of trim ring (1), the back-up ring (2) that is used for the axle location, bracing ring (3), load screw (4) and loading force cell (5); Bracing ring is made of several sheet metals (301), and vertical uniform being bolted between trim ring and the back-up ring; Post a loading force cell (5) on 3 sheet metals in every interval; Bearing (6) places in the bracing ring, and the one end places on the back-up ring (2), and the other end contacts with trim ring (1); Load screw is distributed on the trim ring, and passes bracing ring and back-up ring is spirally connected.

2. according to a kind of bearing charger of claim 1, it is characterized in that: said sheet metal (301) can adopt stainless steel or army's first steel or the memory alloy material that is complementary with bearing material.