CN101852250A

CN101852250A - Device and method for adjusting inner and outer spacers of a pair of back-to-back installed angular contact bearings

Info

Publication number: CN101852250A
Application number: CN 201010165216
Authority: CN
Inventors: 李忠
Original assignee: Shanghai Institute of Technical Physics of CAS
Current assignee: Shanghai Institute of Technical Physics of CAS
Priority date: 2010-04-29
Filing date: 2010-04-29
Publication date: 2010-10-06
Anticipated expiration: 2030-04-29
Also published as: CN101852250B

Abstract

The invention discloses a device and method for adjusting a pair of back-to-back installed angular contact bearing inner and outer spacers. The invention firstly calibrates the relationship between the axial pretightening force and the friction force of the spacers. During calibration, a pair of bearings and outer spacers The ring is installed on the bearing seat, the preload weight is pressed on the upper bearing, and the digital display push-pull force meter measures the friction force of the outer spacer corresponding to the preload; then, add the inner spacer, and use twice the weight The pre-tightening weight is pressed on the bearing, and the friction force of the outer spacer is measured by the digital push-pull gauge, and compared with the calibrated friction force to judge whether the thickness of the inner and outer spacers is correct. In order to simulate the working temperature, the device has a heating device to heat the bearing. The device of the invention has the advantages of simple structure, light weight, small volume and high reliability.

Description

Adjust the device and method of the angular contact bearing internal space ring and external space ring of a pair of back-to-back installation

Technical field

The present invention relates to mechanical component assembling process technique, specifically be meant a kind of device and method of adjusting the angular contact bearing internal space ring and external space ring of a pair of back-to-back installation.

Background technique

Cone spacer and outer ring spacer thickness difference directly influence the pretightening force size of angular contact bearing.At present, the method of check angular contact bearing cone spacer and outer ring spacer thickness difference is, earlier with pouring weight or directly compress the outer ring or the inner ring (pressure is equivalent to pretightening force) of bearing with hand, push away outer ring spacer or cone spacer with finger then, when the sensation tightness was the same, then the internal space ring and external space ring thickness difference promptly met the pretension requirement.

Summary of the invention

The invention provides the installation pretightening force problem that a kind of device and method of adjusting the angular contact bearing internal space ring and external space ring of a pair of back-to-back installation solves accurate controlled angle contact bearing.

The regulating device of internal space ring and external space ring as shown in Figure 1 when angular contact bearing of the present invention " back-to-back " was installed: device comprises thermometric platinum resistor 1, heater band 2, pretightening force balancing weight 3, bearing support 8, warm-air drier 9, warm-keeping ring 12, base 13, slide plate 14, eccentric wheel handle 15 and digital display type pull and push dynamometer 17.Bearing support 8 is connected with base 13 by mat insulation 11 usefulness screws 10, digital display type pull and push dynamometer 17 is contained on the

slide plate

14,13 guide rail is connected on slide plate 14 and the base, eccentric wheel handle 15 is connected on the base 13 by bearing pin 16, the breach that warm-air drier 9 is aimed on the warm-

keeping ring

12,2

thermometric platinum resistors

1 and 2 heater bands 2 are attached to respectively on bearing support 8 and the pretightening force balancing weight 3.Upper bearing (metal) 4 and lower bearing 7 are sleeved on the bearing support 8 top cylinders, lay cone spacer 6 and outer ring spacer 5 between upper bearing (metal) 4 and the lower bearing 7, are pressed with pretightening force balancing weight 3 on bearing is right.Described pretightening force balancing weight 3 comprises calibration balancing weight 3-1 and adjusts balancing weight 3-2 that the weight of wherein adjusting balancing weight 3-2 is 2 times of calibration balancing weight 3-1.Warm-keeping ring 12 is incubated bearing support, bearing to getting up to seal with pretightening force balancing weight cover.

The adjusting method of angular contact bearing internal space ring and external space ring comprises that step is as follows:

1) opens warm-air drier 9 and heater band 2, bearing to being heated to predetermined temperature, and was stablized 20 minutes;

2) relation of axial pre tightening force and spacer ring frictional force is demarcated by elder generation, timing signal, pair of bearings and outer ring spacer 5 are contained on the bearing support, calibration balancing weight 3-1 is pressed in bearing to last, the digital display type pull and push dynamometer promotes the outer ring spacer slippage, thereby records the demarcation frictional force of pairing outer ring spacer under one times of pretightening force;

3) add dress cone spacer 6, and be pressed in bearing to last with the adjustment balancing weight 3-2 of two times of weights, the power of two times of recanalization balancing weights divides two the tunnel to transmit: the one tunnel gives cone spacer 6, outer ring spacer 5 is given on another road, repeating step 1, behind the temperature stabilization, the digital display type pull and push dynamometer is measured the frictional force of outer ring spacer once more;

4) littler if measure the frictional force of outer ring spacer once more than demarcating frictional force, repair thin cone spacer 6, otherwise, repair thin outer ring spacer 5;

5) remeasure the frictional force of outer ring spacer, if frictional force with to demarcate frictional force inconsistent, repeating step 4 is if the frictional force of being surveyed is adjusted end with to demarcate frictional force identical.

The invention has the advantages that:

Because the frictional force of spacer ring is very responsive for pretightening force (positive pressure), so more accurate with the method check cone spacer and outer ring spacer thickness difference.This verifying attachment is simple in structure, in light weight, volume is little, reliability is high.

Description of drawings

Fig. 1 is an installation drawing, among the figure, and 1---the thermometric platinum resistor, 2---heater band; 3---the pretightening force balancing weight; 4---upper bearing (metal); 5---outer ring spacer; 6---cone spacer; 7---lower bearing; 8---bearing support; 9---warm-air drier; 10---screw; 11---mat insulation; 12---warm-keeping ring; 13---base; 14---slide plate; 15---eccentric wheel handle; 16---bearing pin; 17---the digital display type pull and push dynamometer.

Fig. 2 demarcates friction measurement figure for bearing, and wherein pretightening force balancing weight 3 adopts the calibration balancing weight 3-1 of 1 times of weight, and outer ring spacer is not adorned.

Fig. 3 is the graphics of pretightening force balancing weight part, 3-1 among the figure---the calibration balancing weight; 3-2---adjust balancing weight.

Embodiment

Below the specific embodiment of the present invention is described in further detail:

See Fig. 2, upper bearing (metal) 4, outer ring spacer 5, lower bearing 7, be contained on the bearing support 8 of thermometric platinum resistor 1 and heater band 2, and be connected with base 13 by mat insulation 11 usefulness screws 10, the demarcation that thermometric platinum resistor 1 and heater band 2 are housed is pushed down upper bearing (metal) with calibration balancing weight 3-1, the breach that warm-air drier 9 is aimed on the warm-keeping ring 12, digital display type pull and push dynamometer 17 is contained on the slide plate 14, is connected with 13 guide rail on the base.Eccentric wheel handle 15 is connected on the base 13 by bearing pin 16.When heater band calibration balancing weight 3-1, bearing support and bearing inner race temperature control to 75 ℃ ± 4 ℃, warm-air drier is bearing outer ring temperature control to 55 ℃ ± 4 ℃, stablized 20 minutes, after making the typing of bearing heat expansion, rotate eccentric wheel handle, the digital display type pull and push dynamometer is along guide rail movement and promote spacer ring, obtain pretightening force the calibration value of corresponding outer ring spacer frictional force.

Increase cone spacer 6, after heater band and warm-air drier are heated to predetermined temperature to bearing, make the typing of bearing heat expansion, rotate eccentric wheel handle, the digital display type pull and push dynamometer is along guide rail movement and promote outer ring spacer, obtains the test value of outer ring spacer frictional force.

The test value of outer ring spacer frictional force and calibration value are contrasted, and test value is too thinner than the bright outer ring spacer of calibration value novel, otherwise too thick.

The demarcation balancing weight 3-1 diameter 47mm that adopts among the embodiment, long 50mm; Adjust balancing weight 3-2 diameter 47mm, long 90mm; Upper bearing (metal) 4 external diameter 47mm, internal diameter 25mm, thick 12mm, model 7005C; Outer ring spacer 5 external diameter 47mm, internal diameter 40mm, thick 4mm; Cone spacer 6 external diameter 32mm, internal diameter 25mm, thick 4mm; Lower bearing 7 external diameter 47mm, internal diameter 25mm, thick 12mm, model 7005C; Bearing support 8 diameter 63mm, long 88mm; Mat insulation 11 diameter 63mm, thick 2mm; Warm-keeping ring 12 diameter 72mm, long 140mm; Base 13 long 170mm, wide 100mm, high 80mm; Slide plate 14 long 100mm, wide 76mm, thick 6mm; Eccentric wheel handle 15 diameter 30mm, thick 6mm, long 40mm; Bearing pin 16 diameter 4mm, long 12mm; Digital display type pull and push dynamometer 17 long 100mm, wide 75mm, thick 35mm, model HF-50, the permanent space in Suzhou Instr Ltd. produces.

Claims

1. A device for adjusting the inner and outer spacers of a pair of back-to-back angular contact bearings, including a base (13), a digital push-pull gauge (17), a bearing seat (8), a heater (9), and two measuring Platinum temperature resistance (1), 2 heating plates (2), pre-tightening weight (3) and heat preservation ring (12), characterized in that: the bearing seat (8) is used by the heat insulating pad (11) The screw (10) is connected with the base (13); the digital push-pull gauge (17) is mounted on the slide plate (14), and the slide plate (14) is connected with the guide rail of the base (13); the eccentric wheel handle (15 ) is connected on the base (13) by a pin shaft (16); the heater (9) is aligned with the gap on the insulation ring (12); the 2 platinum resistance thermometers 1 and 2 heating plates 2 Stick on the bearing block (8) and the pre-tightening force counterweight (3) respectively; the thermal insulation ring (12) covers the bearing seat, the bearing pair and the pre-tightening force counterweight to seal and insulate.

2. A device for adjusting a pair of inner and outer spacers of angular contact bearings installed back-to-back according to claim 1, characterized in that: said preload counterweight (3) is composed of a calibration counterweight (3 -1) and the adjustment counterweight (3-2) constitute, wherein the weight of the adjustment counterweight (3-2) is 2 times of the calibration counterweight (3-1).

3. an adjustment method based on the back-to-back installation of the angular contact bearing inner and outer spacers of the device according to claim 1, characterized in that it comprises the following steps:

1) Turn on the heater (9) and the heating plate (2), heat the bearing pair to the predetermined temperature, and stabilize it for 20 minutes;

2) First calibrate the relationship between the axial preload force and the friction force of the spacer. During calibration, install a pair of bearings and the outer spacer (5) on the bearing seat, and press the calibration weight (3-1) on the bearing For the above, the digital display push-pull force gauge pushes the outer spacer to slide, so as to measure the calibrated friction force of the outer spacer corresponding to the double preload;

3) Install the inner spacer ring (6), and press the double-heavy adjustment counterweight (3-2) on the bearing pair, and the force of the double-heavy adjustment counterweight is transmitted in two ways: one to the inner spacer (6), the other way is for the outer spacer (5), repeat step 1, after the temperature is stable, measure the friction of the outer spacer again with a digital push-pull gauge;

4) If the friction force of the outer spacer measured again is smaller than the calibrated friction force, thin the inner spacer (6), otherwise, thin the outer spacer (5);

5) Measure the friction force of the outer spacer again. If the friction force is not consistent with the calibrated friction force, repeat step 4. If the measured friction force is the same as the calibrated friction force, the adjustment is completed.