CN101762359B

CN101762359B - Inside oil baffle structure of bearing bush machine for dynamic balance test of rotor of large turbo-type generator

Info

Publication number: CN101762359B
Application number: CN2009100732808A
Authority: CN
Inventors: 刘俊英; 刘昱光; 刘超
Original assignee: Harbin Electric Machinery Co Ltd
Current assignee: Harbin Electric Machinery Co Ltd
Priority date: 2009-11-27
Filing date: 2009-11-27
Publication date: 2012-02-08
Anticipated expiration: 2029-11-27
Also published as: CN101762359A

Abstract

The invention relates to an inside oil baffle structure of a bearing bush machine for the dynamic balance test of a rotor of a large turbo-type generator, which comprises a drain pan and an oil baffle table at the inner side of the bearing bush machine, a tungsten structure on the surfaces of the drain pan and the oil baffle table, a small oil baffle cover assembled at the inner side of the bearing bush machine for test, a copper comb embedded into the small oil baffle cover and a structure of spigot positioned between the small oil baffle cover and the bearing bush for test. In the invention, the application of the oil baffle structure of the bearing bush for test reduces the installation requirement of the bearing for test than before, and the effect of oil baffling is enhanced obviously than before without oil leakage not for a moment.

Description

The dynamic balance test of rotor of large turbo-type generator inside oil baffle structure of bearing bush machine

Technical field:

The present invention relates to the rotor of large turbo-type generator transient equilibrium with the inboard oil baffle structure of test bearing shell machine.

Technical background:

Need test bearing during the rotor of large turbo-type generator transient equilibrium, comprising test bearing seat (13), test bearing shell (15), test retaining oil cap (12).The effect of test retaining oil cap (12) is to prevent to test the bearing oil that forms oil film between bearing shell loading end (10) and the main shaft (14) to let out the bearing outside in the test bearing; But the design of oil baffle structure has also been played sizable effect for preventing that lubricating oil from leaking in the test bearing shell (15).

The test bearing shell (15) that large turbo-type generator transient equilibrium is in the past used; Its structure is all consistent with product bearing shell (16) with size; Even discrete trial bearing shell (15) size changes, also just change the spherical diameter at external diameter position once by test bearing seat (13) size; And test bearing shell (15) and main shaft (14) form the internal diameter position of oil film, and its structure and size are consistent with product bearing shell (16).

As shown in Figure 1, product bearing shell (16) has sealing bearing bush (11) to be separated by between the retaining oil cap (17) in its machine inboard and the product in operational process, and product bearing shell (16) machine inboard does not just have oil baffle structure like this.So there is oil baffle structure in the only organic outside of product bearing shell (16).

During test bearing shell (15) operation; The inboard adjacent position of its machine does not have sealing bearing bush (11); But direct adjacent with inboard test retaining oil cap (12), like this owing to test bearing shell (15) itself does not possess oil baffle structure, oil leakage phenomenon takes place in the machine inboard through the bearing of being everlasting when just making test; Even improve the installation requirement of test retaining oil cap (12), can not address this problem.

Summary of the invention:

The objective of the invention is to disclose a kind of rotor dynamic balancing that can improve greatly and keep off oil, avoid occurring the dynamic balance test of rotor of large turbo-type generator inside oil baffle structure of bearing bush machine of test bearing leakage of oil.Technical scheme of the present invention is: a kind of dynamic balance test of rotor of large turbo-type generator inside oil baffle structure of bearing bush machine, test bearing shell are installed on the inboard next-door neighbour's test of its machine bearing shell loading end, and test bearing shell loading end outer end is a drain pan; The drain pan bottom has first outage; The outside test bearing shell body of drain pan forms the retaining tank deck, and retaining tank deck surface has tungsten gold structural sheet, the little retaining oil cap of assembling on the test bearing shell end face; The copper broach that little retaining oil cap studs with; Have between little retaining oil cap and test bearing shell and lean on seam, little retaining oil cap and adjacent test bearing shell keep off and form a draining chamber between the tank deck, and bottom, draining chamber has second outage.Principle of work of the present invention is: when rotor of large turbo-type generator carries out dynamic balance running; Bearing oil forms oil film between test bearing shell loading end and main shaft; If test bearing shell itself does not keep off oily measure; So a large amount of oil can directly be sprayed onto on the test retaining oil cap, and oil is shot out in the gap of test retaining oil cap and main shaft, forms the horn shape mist of oil of taper.If test bearing shell itself has oil baffle structure, this part oil baffle structure can block overwhelming majority oil, and the oil mass that is sprayed onto on the test retaining oil cap is very little, thereby oil leakage phenomenon can not take place.The oil baffle structure of test bearing shell itself has an advantage, and this part oil baffle structure can move along with the motion of main shaft with the test bearing shell together, though very little can not the grinding in gap of it and main shaft hindered main shaft.

Description of drawings

Fig. 1 prior art bearing shell oil baffle structure cut-open view

Fig. 2 the present invention tests bearing shell, bearing seat, retaining oil cap structure cut-open view

Fig. 3 is test inside oil baffle structure of bearing bush machine A amplification view

In the accompanying drawing:

1. drain pan 2. keeps off tank decks

3. tungsten gold structure 4. little retaining oil caps

5. copper broach 6. positioning spigots

7. draining chamber 8. drain pans first outage

9. draining chamber second outage 10. bearing shell loading ends

11. sealing bearing bush 12. test retaining oil caps

13. test bearing seat 14. main shafts

15. test bearing shell 16. product bearing shells

17. retaining oil cap in the product

Embodiment:

The present invention as shown in Figure 3 is a kind of dynamic balance test of rotor of large turbo-type generator inside oil baffle structure of bearing bush machine; Test bearing shell 15 is installed on the inboard next-door neighbour's test of its machine bearing shell loading end 10, and test bearing shell loading end 10 outer ends are drain pan 1, and drain pan 1 bottom has first outage 8; Drain pan 1 outside test bearing shell body forms retaining tank deck 2; Retaining tank deck 2 surfaces have tungsten gold structural sheet 3, the little retaining oil cap 4 of assembling on test bearing shell 15 end faces, the copper broach 5 that little retaining oil cap 4 studs with; Little retaining

oil cap

4 and 15 on bearing shell of test have by seam 6; First outage 8 of drain pan 1 bottom, little retaining oil cap 4 and adjacent test bearing shell keep off and form a draining chamber 7 between the tank deck 2, and 7 bottoms, draining chamber have second outage 9.Go up and lean on seam 6 end faces to stud with copper broach 5.

Inboard drain pan 1 width of test bearing shell 15 machines is that 25.4mm, the degree of depth are 12mm, and internal diameter is the face of cylinder; As shown in Figure 2, inboard retaining tank deck 2 width of test bearing shell 15 machines are 12.7mm, with the gap of main shaft 14 be 0.70～0.73mm, internal diameter is the face of cylinder; Drain pan 1 all is a tungsten gold structure 3 with retaining tank deck 2 surfaces; First outage 8 is arranged at the drain pan bottom.Be assembled to the inboard little retaining oil cap 4 of test bearing shell 15 machines; Be common Q 235 materials, its internal diameter studs with twice copper broach 5, and the thickness of copper broach 5 is that the thick copper coin of 2mm is made; Its inner diameter location is processed into angular shape; Axial centre distance is 6.4mm between the twice copper broach 5, forms a width 19mm, the degree of depth draining chamber 7 greater than 70mm between little retaining oil cap 4 and the retaining tank deck 2, and second outage 9 is arranged at bottom, draining chamber.

Can analogize by the oily principle of this test bearing shell 15 retaining that to produce structural principle identical, but the vicissitudinous various ways in physical dimension and position.Such test bearing shell 15 changes in any case, and the oil baffle structure that its machine is inboard all within this structural change scope, can play identical retaining oil effect.Further analogize again and can produce by this test bearing shell 15 oil baffle structure principles, have only drain pan 1 and retaining tank deck 2, do not have the test inside oil baffle structure of bearing bush machine of little retaining oil cap 4.

Installation requirement: before test bearing shell 15 is installed, be assembled to little retaining oil cap 4 on the test bearing shell 15 through seam location 6; When test bearing shell 15 is installed, require bearing center corresponding, can be installed to the position of requirement with the little retaining oil cap 4 of warranty test bearing shell 15 with underproof rotor bearing center; Test bearing shell 15 installs, and the check test bearing shell copper broach 5 and the gap of main shaft 14 to meet drawing requirement.

Effect: the application of new construction test bearing shell 15; Do not change the design of bearing shell loading end 10; The dynamic balance test of rotor data had no influence; Do not adorn the left space of sealing bearing bush 11 when but having made full use of dynamic balance test of rotor, on the test bearing shell 15 of test bearing seat 13 and the inboard inside cavity of test retaining oil cap 12 machines, increased twice and kept off oily measure, compensated the oily ability of rotor dynamic balancing inboard retaining on opportunity effectively; Fundamentally eliminate the inboard leakage of oil problem of test retaining oil cap 12 machines, also reduced test retaining oil cap 12 manufacturings and mounting hardness.

Adopt the retaining oil effect of new construction test bearing shell 15, can also from following data, draw.It is 0.20～0.25mm that the test retaining oil cap 12 of test bearing shell 15 in the past requires with main shaft 14 gaps; The test retaining oil cap 12 of new construction test bearing shell 15 requires with the gap of main shaft 14: 0.47～0.57mm.Although the test retaining oil cap 12 of new construction test bearing shell 15 outsides and main shaft 14 gaps than former gap big more than the twice, because oil leakage phenomenon but never took place the retaining oil effect of new construction test bearing shell 15 self.And in the past during rotor dynamic balancing test bearing shell 15 machine inboards do not have oil baffle structure, although test retaining oil cap 12 is very little with the gap of main shaft 14, oil leakage phenomenon often takes place in the machine inboard.

Can find out through above introduction,, can improve the effect of rotor dynamic balancing retaining oil greatly, avoid occurring the phenomenon of test bearing leakage of oil by the present invention.

Claims

1. dynamic balance test of rotor of large turbo-type generator inside oil baffle structure of bearing bush machine; It is characterized in that: test bearing shell (15) is installed on the test bearing shell inboard next-door neighbour's test bearing shell loading end of machine (10), and test bearing shell loading end (10) outer end is drain pan (1), and drain pan (1) bottom has first outage (8); The outside test bearing shell body of drain pan (1) forms retaining tank deck (2); Retaining tank deck (2) surface has tungsten gold structural sheet (3), assembling little retaining oil cap (4) on test bearing shell (15) end face, the copper broach (5) that little retaining oil cap (4) studs with; Have between little retaining oil cap (4) and test bearing shell (15) and lean on seam (6); First outage (8) of drain pan (1) bottom, little retaining oil cap (4) and adjacent test bearing shell keep off and form a draining chamber (7) between the tank deck (2), and draining chamber (7) bottom has second outage (9).

2. a kind of dynamic balance test of rotor of large turbo-type generator inside oil baffle structure of bearing bush machine according to claim 1 is characterized in that: upward lean on seam (6) end face to stud with copper broach (5).