CN101806304A

CN101806304A - Rotary compressor with axial thrust of crankshaft

Info

Publication number: CN101806304A
Application number: CN200910244340A
Authority: CN
Inventors: 卢挺浩
Original assignee: Gree Electric Appliances Inc of Zhuhai; Zhuhai Landa Compressor Co Ltd
Current assignee: Gree Electric Appliances Inc of Zhuhai; Zhuhai Landa Compressor Co Ltd
Priority date: 2009-12-31
Filing date: 2009-12-31
Publication date: 2010-08-18
Anticipated expiration: 2029-12-31
Also published as: CN101806304B

Abstract

The invention relates to the technical field of refrigeration compressors, in particular to a rotary compressor with the axial thrust of a crankshaft. A supporting spring is arranged on the lower end face of a lower flange of the rotary compressor and supports the tail end face of the eccentric crankshaft; the gravity generated by bearing the eccentric crankshaft and a motor rotor arranged at the upper end of the eccentric crankshaft through the eccentric crankshaft is mostly borne by the supporting spring; and in the working process, the current situation that a contact surface of a lower thrust surface and the lower flange bears most gravity is avoided, the friction and wear of the lower thrust surface and the lower flange are reduced, the eccentric crankshaft is prevented from being loosened in an air cylinder, the compressor works more stably, the noise is reduced, the reliability is strengthened, the energy efficiency is effectively improved, and the service life of the compressor is effectively prolonged.

Description

Rotary compressor with axial thrust of crankshaft

Technical field

The present invention relates to technical field of refrigeration compressors, relate in particular to a kind of rotary compressor with axial thrust of crankshaft.

Background technique

Compressor is that compression refrigerant makes it participate in the circuit nucleus equipment in refrigerator, the air-conditioning system, rotary compressor is a kind of compressor commonly used, the structure of existing rotary compressor is as shown in Figure 1: include upper flange 1, lower flange 2, cylinder 3, eccentric crankshaft 4, upper flange 1, lower flange 2 lids are located at the two ends of cylinder 3, eccentric crankshaft 4 wore upper flange 1, lower flange 2, and the eccentric part 44 of eccentric crankshaft 4 and the upper and lower thrust surface of eccentric part 44 41,42 are arranged between the upper and lower flange 1,2.In existing compressor, on the eccentric crankshaft 4, following

thrust surface

41,42 contact respectively near last, lower flange 1,2 end face, be used to reduce eccentric crankshaft 4 and upper flange 1, thereby long-pending the reducing of the direct contact surface between the lower flange 2 rubs, but because eccentric crankshaft 4 carrying self and the weight that is arranged on eccentric crankshaft 4 upper end rotors 8, the gravity major part that is produced is all born by the following thrust surface 42 and the contacting point of lower flange 2, therefore in the course of the work, following thrust surface 42 is more serious with the abrasion condition of the surface of contact of lower flange 2, cause friction to increase after the wearing and tearing, eccentric crankshaft 4 is loosening in cylinder 3, thereby makes the compressor operating instability, noise increases, poor reliability, efficiency reduces, shorten the life-span of compressor.

Summary of the invention

Of the present invention is big at the following thrust surface of the eccentric crankshaft of present rotary compressor and lower flange fretting wear and problem that produce, and a kind of exhaust device of rotary compressor that overcomes the above problems is provided.

For reaching above purpose, adopt following technological scheme:

A kind of rotary compressor with axial thrust of crankshaft, described rotary compressor includes upper flange, lower flange, cylinder, eccentric crankshaft, upper flange, lower flange lid are located at the two ends of cylinder, eccentric crankshaft wore upper flange, lower flange, and the upper and lower thrust surface of the eccentric part of eccentric crankshaft is arranged between the upper and lower flange; The lower end surface of described lower flange is provided with supporting spring, and described supporting spring is held the breech face of eccentric crankshaft.

The gap, upper-end surface of wherein said thrust surface down and lower flange is provided with.

Wherein said supporting spring and lower flange design for one.

Be provided with a wear plate between the breech face of wherein said supporting spring and eccentric crankshaft.

Wherein said supporting spring and lower flange design for split.

Wherein said lower flange lower end surface is provided with groove, and supporting spring is arranged in the groove.

Wherein said supporting spring and lower flange are bolted to connection.

The gap, upper-end surface of wherein said thrust surface down and lower flange is D, and the span of D is: 0.2≤D≤1.0mm.

Wherein said rotary compressor is single cylinder rotary compressor or duplex-cylinder rotary compressor.

Beneficial effect of the present invention is: the lower end surface of rotary compressor lower flange of the present invention is provided with supporting spring, and supporting spring is held the breech face of eccentric crankshaft; Eccentric crankshaft carrying self and the gravity major part that weight produced that is arranged on eccentric crankshaft upper end rotor are born by supporting spring, in the course of the work, avoid the surface of contact of thrust surface and lower flange under the prior art to bear the present situation of main gravity, reduced the friction of time thrust surface and lower flange, reduce both wearing and tearing, avoid eccentric crankshaft loosening in cylinder, compressor operating is stable more, noise reduces, reliability strengthens, efficiency is effectively promoted, and prolongs the working life of compressor.

Description of drawings

Fig. 1 is a prior art rotary compressor structural representation;

Fig. 2 is the embodiment of the invention 1 structural representation;

Fig. 3 is the embodiment of the invention 2 structural representations;

Fig. 4 is the embodiment of the invention 3 structural representations;

Fig. 5 is the embodiment of the invention 4 structural representations.

Embodiment

Below in conjunction with accompanying drawing the present invention is further specified:

Embodiment 1, as shown in Figure 2: a kind of rotary compressor with axial thrust of crankshaft, rotary compressor is single cylinder rotary compressor or duplex-cylinder rotary compressor, as present embodiment is the single cylinder rotary compressor, rotary compressor includes upper flange 1, lower flange 2, cylinder 3, eccentric crankshaft 4, upper flange 1, lower flange 2 lids are located at the two ends of cylinder 3, eccentric crankshaft 4 wore upper flange 1, lower flange 2, on the eccentric part 44 of eccentric crankshaft 4 and the eccentric part 44, following

thrust surface

41,42 are arranged on, lower flange 1, between 2, the upper end outside cylinder 3 of eccentric crankshaft 4 is provided with rotor 8, the lower end surface 21 of lower flange 2 is provided with supporting spring 5, and supporting spring 5 is held the breech face 43 of eccentric crankshaft 4; In the present embodiment, supporting spring 5 and the design of lower flange 2 one, step-like convex ring plate is arranged in axis hole 23 lower ends of lower flange 2, and the convex ring plate forms supporting spring 5, and supporting spring 5 is held the breech face 43 of eccentric crankshaft 4; The gravity that rotary compressor eccentric crankshaft 4 under this configuration state and rotor 8 are produced all has supporting spring 5 to bear.

Embodiment 2, as shown in Figure 3: present embodiment and embodiment's 1 structure are basic identical, difference is, 43 of breech faces at supporting spring 5 and eccentric crankshaft 4 are provided with a wear plate 6, can avoid because the abrasion resistance of lower flange 2 materials causes both parts to wear and tear easily inadequately, need use small pieces wear resistance material preferably just can solve such problem; There is friction in thrust surface 42 with lower flange 2 in order thoroughly to remove down in addition, so will descend upper-end surface 22 gap design of thrust surface 42 and lower flange 2, the gap is D, sum up by test data, the span of D is: 0.2mm≤D≤1.0mm, such span is fit to actual demand, if the gap is too little, occurs thrust surface 42 mill lower flanges 2 down easily; If the gap is too big, stability and reliability variation the situation that eccentric crankshaft 4 becomes flexible can appear.

Embodiment 3, as shown in Figure 4: the mode of structure of present embodiment is similar to embodiment's 2 general structure modes, difference is, in the present embodiment, supporting spring 5 and lower flange 2 are for split designs, and supporting spring 5 is a wear plate, is provided with groove 211 in lower flange 2 lower end surfaces 21, supporting spring 5 is arranged in the groove 211, is convenient to the location assembling like this; Supporting spring 5 is fixedlyed connected by bolt 7 with lower flange 2, generally, in order to reduce noise, lid can be set on lower flange 2 establish baffler 10, in order to strengthen the sealing at silencing apparatus 10 and lower flange 2 edges, usually the bottom surface of supporting spring 5 and the lower end surface 21 of lower flange 2 are in the plane substantially, porose position 101 is arranged in the position that is located at bolt 7 in muffler cover, and 7 on bolt being convenient to bolt 7 exposes.

Embodiment 4, as shown in Figure 5: first three items embodiment is the embodiment of single cylinder compressor, present embodiment is the embodiment of a twin-tub rotary compressor, duplex-cylinder rotary compressor is also used widely at refrigeration industry, belong to type ripe in the industry, be with the main distinction of single cylinder rotary compressor, the eccentric crankshaft 4 of duplex-cylinder rotary compressor is provided with the eccentric part 44 of two symmetries, cylinder 3 middle parts use dividing plate 9 to be divided into two cavitys, in the cavity that eccentric part 44 is placed in one respectively, the motor compressor that rotates a circle carries out two tasks like this, can also reduce the Influence from Eccentric that is produced in single cylinder compressor eccentric crankshaft 4 working procedure, the duplex-cylinder rotary compressor of present embodiment is provided with supporting spring 5 in the lower end surface 21 of lower flange 2, supporting spring 5 is held the breech face 43 of eccentric crankshaft 4, and supporting spring 5 is a wear plate, is provided with groove 211 in lower flange 2 lower end surfaces 21, supporting spring 5 is arranged in the groove 211, is convenient to the location assembling like this; Supporting spring 5 is fixedlyed connected by bolt 7 with lower flange 2, and is the same with embodiment 2, upper-end surface 22 gap design of following thrust surface 42 and lower flange 2.

The above embodiment, it is the preferred embodiments of type of the present invention, be not to limit the scope of the present invention,, all should be included in the patent claim of the present invention so all equivalences of doing according to the described structure of the present patent application claim, feature and principle change or modify.

Claims

1. rotary compressor with axial thrust of crankshaft, described rotary compressor includes upper flange (1), lower flange (2), cylinder (3), eccentric crankshaft (4), upper flange (1), lower flange (2) lid are located at the two ends of cylinder (3), eccentric crankshaft (4) wore upper flange (1), lower flange (2), and the upper and lower thrust surface of the eccentric part of eccentric crankshaft (4) (41,42) is arranged between the upper and lower flange (1,2); It is characterized in that the lower end surface (21) of described lower flange (2) is provided with supporting spring (5), described supporting spring (5) is held the breech face (43) of eccentric crankshaft (4).

2. the rotary compressor with axial thrust of crankshaft according to claim 1 is characterized in that, described thrust surface (42) down is provided with the gap, upper-end surface (22) of lower flange (2).

3. the rotary compressor with axial thrust of crankshaft according to claim 1 is characterized in that, described supporting spring (5) designs for one with lower flange (2).

4. the rotary compressor with axial thrust of crankshaft according to claim 3 is characterized in that, is provided with a wear plate (6) between the breech face (43) of described supporting spring (5) and eccentric crankshaft (4).

5. the rotary compressor with axial thrust of crankshaft according to claim 1 is characterized in that, described supporting spring (5) designs for split with lower flange (2).

6. the rotary compressor with axial thrust of crankshaft according to claim 5 is characterized in that, described lower flange (2) lower end surface (21) is provided with groove (211), and supporting spring (5) is arranged in the groove (211).

7. the rotary compressor with axial thrust of crankshaft according to claim 5 is characterized in that, described supporting spring (5) is fixedlyed connected by bolt (7) with lower flange (2).

8. the rotary compressor with axial thrust of crankshaft according to claim 2 is characterized in that, described thrust surface (42) down is D with the gap, upper-end surface (22) of lower flange (2), and the span of D is: 0.2 mm≤D≤1.0mm.

9. have the rotary compressor of axial thrust of crankshaft according to described any one of claim 1-8, it is characterized in that, described rotary compressor is single cylinder rotary compressor or duplex-cylinder rotary compressor.