CN103292998B

CN103292998B - Single oscillation driven member Double-disk cam oscillating bearing high-speed tester (HST)

Info

Publication number: CN103292998B
Application number: CN201310268847.3A
Authority: CN
Inventors: 刘喜平; 杨育林; 黄世军
Original assignee: Yanshan University
Current assignee: Yanshan University
Priority date: 2013-07-01
Filing date: 2013-07-01
Publication date: 2016-05-04
Anticipated expiration: 2033-07-01
Also published as: CN103292998A

Abstract

The present invention discloses a kind of single oscillation driven member Double-disk cam oscillating bearing high-speed tester (HST). The middle part of described high-speed rotating shaft I, II and intermediate propeller shaft all connects firmly a travelling gear I, II, III, one end of high-speed rotating shaft I, II is installed with respectively a driving cam I, II and equilibrium cam I, II, and the other end of one in high-speed rotating shaft I, II is connected with motor by shaft coupling. Outer ring and the loading hydraulic cylinder of test oscillating bearing connect firmly. On the horizontal minor axis in L shaped fork bottom that the other end of swing in high frequency axle connects firmly, rolling bearing IX is installed. The high-speed rotating shaft of this invention and with it hard-wired driving cam, the equilibrium cam dynamic balance structure that is as the criterion, therefore, has that frictional force is little, a feature such as the little and noise of light abrasion, impact is low. Its hunting frequency can reach 70～80Hz, can meet the requirement of swing in high frequency For The Spherical Plain Bearing fatigue test.

Description

Single oscillation driven member Double-disk cam oscillating bearing high-speed tester (HST)

Technical field

The present invention relates to a kind of single oscillation driven member Double-disk cam oscillating bearing high-speed tester (HST).

Background technology

Oscillating bearing is a kind of sliding bearing of special construction, and mainly by one, the inner ring with spherical outside surface and an outer ring with Internal Spherical Surface form. Oscillating bearing because thering is flexible, non-maintaining, the compact conformation of rotation, be easy to mounting or dismounting, the plurality of advantages such as bearing capacity is large, the life-span is long, be widely used in the connection of aviation aircraft oscillating structural member.

Aviation aircraft is in flight course, and the inefficacy of any composition member all can cause catastrophic effect. Therefore be a very serious and important job to the definite of aviation aircraft composition member service life. In order to determine accurately the service life of aviation aircraft composition member, conventionally way is that aviation aircraft composition member is carried out to the fatigue test under Reality simulation working condition, then is to the service life of aviation aircraft composition member the fatigue life of trying to achieve by test divided by a safety coefficient.

Oscillating bearing, as one of important composition member of aviation aircraft, also must carry out the fatigue test under Reality simulation working condition. Oscillating bearing swinging frequency very high (30～70Hz) on some aviation aircraft, and the oscillating bearing fatigue tester that China is used at present adopts slider-crank mechanism more, because this mechanism is difficult to realize the dynamic balancing of moving link, therefore its highest hunting frequency is generally no more than 20Hz, cannot meet the requirement of swing in high frequency For The Spherical Plain Bearing fatigue test, seriously restrict the development of domestic swing in high frequency For The Spherical Plain Bearing.

Summary of the invention

In order to overcome the oscillating bearing fatigue tester above shortcomings of existing employing slider-crank mechanism, the invention provides a kind of single oscillation driven member Double-disk cam oscillating bearing high-speed tester (HST). The high-speed rotating shaft of this invention and with it hard-wired driving cam, the equilibrium cam dynamic balance structure that is as the criterion, therefore, has that frictional force is little, a feature such as the little and noise of light abrasion, impact is low.

The technical solution adopted for the present invention to solve the technical problems is: a kind of single oscillation driven member Double-disk cam oscillating bearing high-speed tester (HST), comprises travelling gear I, II, III, test oscillating bearing, loading hydraulic cylinder, rolling bearing I, II, III, IV, V, VI, VII, VIII, IX, shaft coupling and motor. Described two high-speed rotating shaft I, II and intermediate propeller shafts are bearing in respectively on two rolling bearings, all connect firmly a travelling gear at the middle part of two high-speed rotating shaft I, II and intermediate propeller shafts, and these three travelling gear I, II, III engage between two; One end of two high-speed rotating shaft I, II fixedly mounts respectively driving cam I, the II other end fixedly mounts respectively equilibrium cam I, II, driving cam I, II and equilibrium cam I, II all have eccentric distance e, e=1～50mm, the center line of driving cam I, II and equilibrium cam I, II is with respect to the axis symmetry of high-speed rotating shaft; The other end of high-speed rotating shaft I is connected with motor by shaft coupling; Swing in high frequency axle is bearing in two rolling bearing VII, VIII, one end of swing in high frequency axle connects firmly with the inner ring of test oscillating bearing, outer ring and a loading hydraulic cylinder of test oscillating bearing connect firmly, the other end of swing in high frequency axle connects firmly L shaped fork, on the horizontal minor axis of L shaped fork bottom, rolling bearing IX is installed, the outer surface of the external cylindrical surface of rolling bearing IX and two driving cam I, II is tangent between two.

Described two high-speed rotating shaft I, II and the intermediate propeller shafts layout that is in the shape of the letter V in space, intermediate propeller shaft is positioned at V font bottom, and two high-speed rotating shaft I, II lay respectively at V font both upper ends thereof point place.

Driving cam I in described two high-speed rotating shaft I, II, II are for arranging in the same way, and the eccentric direction of driving cam I, II is identical, with left or with to the right, and eccentric distance e equal and opposite in direction.

Equilibrium cam I in described two high-speed rotating shaft I, II, II are for arranging in the same way, and the eccentric direction of equilibrium cam I, II is identical, with left or with to the right, and eccentric distance e equal and opposite in direction.

The axis of described rolling bearing IX is all parallel with the axis of two high-speed rotating shaft I, II with swing in high frequency axle, and the axis of the axis of rolling bearing IX and two high-speed rotating shaft I, II is in same plane.

The both ends of the surface plane of symmetry of the both ends of the surface plane of symmetry of described rolling bearing IX and two driving cam I, II is coplanar.

The present invention compared with prior art tool has the following advantages: 1, the high-speed rotating shaft of this invention and with it hard-wired driving cam, the equilibrium cam dynamic balance structure that is as the criterion, in high-speed rotating shaft, driving cam, equilibrium cam rotation process, the large portion of the whole and centrifugal intertia force square of centrifugal intertia force is balanced at high-speed rotating shaft itself, and the block bearing of high-speed rotating shaft is only subject to minimum centrifugal intertia force square effect. 2, driving cam is pure rolling friction with the rolling bearing contacting with it, and frictional force is little, light abrasion. 3, because the protruding roller bearing shop with contact with it of work only has minim gap (about 0.03mm), therefore impact is between the two little, noise is low. The hunting frequency of this invention can reach 70～80Hz, can meet the requirement of swing in high frequency For The Spherical Plain Bearing fatigue test.

Brief description of the drawings

Fig. 1 is that single oscillation driven member Double-disk cam oscillating bearing high-speed tester (HST) duty master looks generalized section;

Fig. 2 is the B-B cross-sectional schematic of Fig. 1;

Fig. 3 is the C-C cross-sectional schematic of Fig. 1;

Fig. 4 is the D-D generalized section of Fig. 2.

In above-mentioned accompanying drawing, 1. driving cam II, 2.L shape fork, 3. swing in high frequency axle, 4. rolling bearing IX, 5. driving cam I, 6, 9. rolling bearing I, II, 7. travelling gear I, 8. high-speed rotating shaft I, 10. equilibrium cam I, 11. shaft couplings, 12. motors (or hydraulic motor), 13, 20. rolling bearing V, VI, 14. travelling gear III, 15. equilibrium cam II, 16, 19. rolling bearing III, IV, 17. high-speed rotating shaft II, 18. travelling gear II, 21. intermediate propeller shafts, 22, 23. rolling bearing VII, VIII, 24. loading hydraulic cylinders, 25. test oscillating bearings.

Detailed description of the invention

Embodiment

In a kind of single oscillation driven member Double-disk cam oscillating bearing high-speed tester (HST) working state schematic representation shown in Fig. 1～Fig. 4, the one end that is bearing in a high-speed rotating shaft 8 in two rolling bearing I, II (6,9) is connected with motor (or hydraulic motor) 12 by shaft coupling 11, connect firmly a travelling gear I 7 at the middle part of high-speed rotating shaft 8, one end of high-speed rotating shaft 8 connects firmly equilibrium cam I 10 other ends and connects firmly a driving cam I 5. The middle part that is bearing in a high-speed rotating shaft II 17 in two rolling bearing III, IV (16,19) connects firmly a travelling gear II 18, and one end of high-speed rotating shaft II 17 connects firmly equilibrium cam II 15 other ends and connects firmly a driving cam II 1. The middle part that is bearing in an intermediate propeller shaft 21 in two rolling bearing V, VI (13,20) connects firmly a travelling gear III 14. Swing in high frequency axle 3 is bearing in two rolling bearing VII, VIII (22,23) is upper, and one end of swing in high frequency axle 3 connects firmly with the inner ring of test oscillating bearing 25, and outer ring and a loading hydraulic cylinder 24 of test oscillating bearing 25 connect firmly. The other end of swing in high frequency axle 3 connects firmly a L shaped fork 2, on the horizontal minor axis of L shaped fork 2 bottoms, a rolling bearing IX 4 is installed. Travelling gear I 7, travelling gear III 14, travelling gear II 18 are intermeshing between two. High-speed rotating shaft I 8, high-speed rotating shaft II 17 and intermediate propeller shaft 21 layout that is in the shape of the letter V in space, intermediate propeller shaft 21 is positioned at V font bottom, and high-speed rotating shaft I 8, high-speed rotating shaft II 17 lay respectively at V font both upper ends thereof point place. Driving cam I 5 and equilibrium cam I 10 all have eccentric distance e, e=15mm, and the center line of driving cam I 5 and equilibrium cam I 10 is with respect to the axis symmetry of high-speed rotating shaft I 8; Driving cam II 1 and equilibrium cam II 15 all have certain eccentric throw, and the center line of driving cam II 1 and equilibrium cam II 15 is with respect to the axis symmetry of high-speed rotating shaft II 17. Driving cam II 1 in driving cam I 5 and high-speed rotating shaft II 17 in high-speed rotating shaft I 8 is for arranging in the same way, i.e. driving cam I 5 identical with the eccentric direction of driving cam II 1 (with left or with to the right), eccentric throw equal and opposite in direction. Equilibrium cam II 15 in equilibrium cam I 10 and high-speed rotating shaft II 17 in high-speed rotating shaft I 8 is for arranging in the same way, i.e. equilibrium cam I 10 identical with the eccentric direction of equilibrium cam II 15 (with left or with to the right), eccentric throw equal and opposite in direction. The axis of rolling bearing IX 4 is all parallel with the axis of two high-speed rotating shaft I, II (8,17) with swing in high frequency axle 3, and the axis of the axis of rolling bearing IX 4 and two high-speed rotating shaft I, II (8,17) is in same plane, the outer surface of the external cylindrical surface of rolling bearing IX 4 and two driving cam I, II (5,1) is tangent between two, and the both ends of the surface plane of symmetry of the both ends of the surface plane of symmetry of rolling bearing IX 4 and two driving cam I, II (5,1) is coplanar.

The course of work of the present invention is as follows: motor 12 drives high-speed rotating shaft I 8 to rotate by shaft coupling 11, drive intermediate propeller shaft and another root high-speed rotating shaft to rotate by three travelling gears, the direction of rotation identical (be all clockwise or be all counterclockwise) of two high-speed rotating shaft I, II (8,17), driving cam I, II (5,1) and the equilibrium cam I, the II (10,15) that are fixedly mounted in two high-speed rotating shaft I, II (8,17) are made synchronized rotating Vortex in company with high-speed rotating shaft. two driving cam I, II (5, 1) revolve in the process turning around, promote L shaped fork and the swing in high frequency axle that connects firmly with it swings once around self axis reciprocating rotating by the rolling bearing IX 4 of installing on the horizontal minor axis in L shaped fork bottom, connect firmly the inner ring of the test oscillating bearing 25 of swing in high frequency shaft end also thereupon reciprocating rotating swing once, the outer ring of the test oscillating bearing 25 connecting firmly with loading hydraulic cylinder 24 is because the restriction that is subject to loading hydraulic cylinder 24 maintains static, so just realize the inner ring of test oscillating bearing 25 with respect to the reciprocal swing in high frequency of outer ring, loading hydraulic cylinder 24 applies pulling force or pressure to the outer ring of test oscillating bearing 25, the pulling force applying or the size of pressure are by HYDRAULIC CONTROL SYSTEM.

Claims

1. a single oscillation driven member Double-disk cam oscillating bearing high-speed tester (HST), comprise travelling gear I, II, III, test oscillating bearing, loading hydraulic cylinder, rolling bearing I, II, III, IV, V, VI, VII, VIII, IX, shaft coupling and motor, it is characterized in that: two high-speed rotating shaft I, II and intermediate propeller shafts are bearing in respectively on two rolling bearings, all connect firmly a travelling gear at the middle part of two high-speed rotating shaft I, II and intermediate propeller shafts, these three travelling gear I, II, III engage between two; One end fixed installation driving cam I other end fixed installation equilibrium cam I of high-speed rotating shaft I, one end fixed installation driving cam II other end fixed installation equilibrium cam II of high-speed rotating shaft II, driving cam and equilibrium cam all have eccentric distance e, e=1～50mm, the center line of driving cam I, II and equilibrium cam I, II is with respect to the axis symmetry of high-speed rotating shaft; The other end of high-speed rotating shaft I is connected with motor by shaft coupling; Swing in high frequency axle is bearing in two rolling bearing VII, VIII, one end of swing in high frequency axle connects firmly with the inner ring of test oscillating bearing, outer ring and the loading hydraulic cylinder of test oscillating bearing connect firmly, the other end of swing in high frequency axle connects firmly L shaped fork, on the horizontal minor axis of L shaped fork bottom, rolling bearing IX is installed, the outer surface of the external cylindrical surface of rolling bearing IX and two driving cam I, II is tangent between two.

2. single oscillation driven member Double-disk cam oscillating bearing high-speed tester (HST) according to claim 1, it is characterized in that: described two high-speed rotating shaft I, II and the intermediate propeller shafts layout that is in the shape of the letter V in space, intermediate propeller shaft is positioned at V font bottom, and two high-speed rotating shaft I, II lay respectively at V font both upper ends thereof point place.

3. single oscillation driven member Double-disk cam oscillating bearing high-speed tester (HST) according to claim 1 and 2, it is characterized in that: driving cam I in described two high-speed rotating shaft I, II, II are for arranging in the same way, the eccentric direction that is driving cam I, II is identical, with left or with to the right, eccentric distance e equal and opposite in direction.

4. single oscillation driven member Double-disk cam oscillating bearing high-speed tester (HST) according to claim 1 and 2, it is characterized in that: equilibrium cam I in described two high-speed rotating shaft I, II, II are for arranging in the same way, the eccentric direction that is equilibrium cam I, II is identical, with left or with to the right, eccentric distance e equal and opposite in direction.

5. single oscillation driven member Double-disk cam oscillating bearing high-speed tester (HST) according to claim 1, it is characterized in that: the axis of described rolling bearing IX is all parallel with the axis of two high-speed rotating shaft I, II with swing in high frequency axle, and the axis of the axis of rolling bearing IX and two high-speed rotating shaft I, II is in same plane.

6. single oscillation driven member Double-disk cam oscillating bearing high-speed tester (HST) according to claim 1, is characterized in that: the both ends of the surface plane of symmetry of the both ends of the surface plane of symmetry of described rolling bearing IX and two driving cam I, II is coplanar.