CN201037462Y

CN201037462Y - Novel exhaust seat ring structure for rotary piston compressor

Info

Publication number: CN201037462Y
Application number: CNU2007200694747U
Authority: CN
Inventors: 周易; 丛丽; 米廷灿
Original assignee: Shanghai Hitachi Household Appliance Co Ltd
Current assignee: Shanghai Hitachi Household Appliance Co Ltd
Priority date: 2007-04-28
Filing date: 2007-04-28
Publication date: 2008-03-19
Anticipated expiration: 2017-04-28

Abstract

The utility model relates to a rotary piston compressor, in particular to an exhaust seat retainer structure of rotary piston compressor, which comprises an exhaust seat retainer and an exhaust vent on a cylinder cover of the rotary piston compressor interference fitted and connected with the exhaust seat retainer, wherein, the inner wall of the exhaust seat retainer is a cylindrical hole and the outer wall is of taper shape or step shape, and the exhaust vent on the cylinder cover is of corresponding taper shape or step shape fitted with the outer wall of the exhaust seat retainer. With the technical proposal, as the axial gas force and the valve plate impact force are increased, the exhaust seat retainer and the cylinder cover are fitted more tightly and the axial pressure balanced therewith is increased, thus avoiding loosening of the exhaust seat retainer and the cylinder cover, avoiding increase in the fit interference magnitude of the exhaust seat retainer and the cylinder cover and preventing adverse effects on compressor reliability resulting from deformation caused by increase of the interference magnitude.

Description

The new exhaust seat ring structure of rolling piston compressor

Technical field

The utility model relates to rolling piston compressor, particularly the new exhaust seat ring structure of rolling piston compressor.

Background technique

Rolling piston compressor belongs to positive displacement compressor, rotor-type compressor exhaust seat ring and cylinder cap vent ports interference fit, pressurized gas after compression is finished are discharged by the exhaust seat ring endoporus, the exhaust seat ring impact force and the gas differential pressure power of bearing valve block simultaneously, exhaust seat ring prevents that with composition seal closure cavity such as valve block high pressure gas leakage from entering low-pressure cavity in breathing process in addition.

Existing rolling piston compressor exhaust seat ring is cylindrical structural, but increase along with compressor refrigerating capacity, the area of exhaust seat ring increases, under same differential pressure conditions, the axial gas pressure that is born increases, in addition because the increase of compressor refrigerating capacity, the size of valve block and thickness are also along with increase, the impact force of valve block and exhaust seat ring also increases thereupon, above factor all makes the axial force of bearing of exhaust seat ring increase, when exhaust seat ring is cylindrical, loosening phenomenon may appear in exhaust seat ring and cylinder cap, the traditional approach head it off can only be offset axial difference force and valve block impact force by increasing the frictional force that magnitude of interference improves exhaust seat ring and cylinder cap.If increase but magnitude of interference increases the distortion of exhaust seat ring and cylinder cap, the reliability of compressor can not be guaranteed, and the magnitude of interference increase is unfavorable to assembling, and has reduced efficiency of assembling, has improved the assembly cost of compressor.

Summary of the invention

The purpose of this utility model is to provide a kind of exhaust seat ring of problem that above-mentioned defective can solve the exhaust seat ring axial force of big refrigerating capacity rolling piston compressor that overcomes.

Realize that the object of the invention technological scheme is: a kind of exhaust structure of rolling piston compressor, comprise the exhaust port on the cylinder cap of the rolling piston compressor that exhaust seat ring is connected with interference fit with it, wherein, described exhaust seat ring inwall is cylindrical, its outer wall is taper shape or stepped shape, and the exhaust port on the described cylinder cap is corresponding taper shape or the stepped shape that cooperates with the exhaust seat ring outer wall.

Owing to adopted above-mentioned technical solution, the utlity model has following advantage and good effect:

(1) exhaust seat ring is by cylindrical taper shape or the stepped shape of becoming, when being subjected to the axial force of closed impact force of valve block and difference force, but except that the frictional force balancing axial thrust, the junction point of exhaust seat ring and cylinder cap also produces the pressure balance axial force, reduce greatly the dependence of exhaust seat ring, prevent that exhaust seat ring is subjected to causing that exhaust seat ring is relative with upper cylinder cover loosening when the closed impact force of valve block is excessive with difference force frictional force.

(2) exhaust seat ring is by cylindrical taper shape or the stepped shape of becoming, easier location when exhaust seat ring is pressed into cylinder cap; Taper shape or stepped shape external diameter play the chamfering effect, and it is easier to be pressed into; The reduced exhaust seat ring of taper shape or stepped shape external diameter is pressed into power, and above factor all makes new design exhaust seat ring simple on assembly technology, improves efficiency of assembling, improves assembly cost, produces in enormous quantities for compressor to create conditions.

(3) novel taper shape or stepped shape exhaust seat ring provide the axial action counter-force by conical surface pressure, the matching allowance of exhaust seat ring and cylinder cap can reduce; the small deformation amount can also be avoided the oil film breakdown of the parts that contact with the exhaust seat ring position; further avoid the dry friction of piston, blade and exhaust seat ring, improves the reliability of compressor operating. In addition so exhaust seat ring be pressed into cylinder cap and cooperate the amount of deformation cause to reduce, concerning compressor, can reduce the friction horsepower of parts such as piston blade and gas from the coolant leakage amount of high side to low side, improve compressor performance.

Description of drawings

Fig. 1 is the plan view of rolling piston compressor cylinder cap;

Fig. 2 is new exhaust seat ring one embodiment A of the utility model rolling piston compressor-A sectional drawing;

Fig. 3 is another embodiment A of the new exhaust seat ring of the utility model rolling piston compressor-A sectional drawing.

Embodiment

The utility model is described in further detail below in conjunction with drawings and embodiments:

With reference to figure 1, be the plan view of rolling piston compressor cylinder head.Mark 1 is the exhaust seat ring of cylindrical structural among the figure.The inner and outer wall of this exhaust seat ring is cylindrical.

With reference to figure 2, a kind of new exhaust seat ring structure of rolling piston compressor, comprise the exhaust port on the cylinder cap of the rolling piston compressor that exhaust seat ring 1 is connected with interference fit with it, described exhaust seat ring inwall 11 is cylindrical, its outer wall 12 is conical, and the exhaust port on the described cylinder cap is the corresponding taper shape that cooperates with the exhaust seat ring outer wall.

With reference to figure 3, a kind of new exhaust seat ring structure of rolling piston compressor, comprise the exhaust port on the cylinder cap of the rolling piston compressor that exhaust seat ring 1 is connected with interference fit with it, described exhaust seat ring inwall 11 is cylindrical, its outer wall 12 is a stepped shape, and the exhaust port on the described cylinder cap is the corresponding stepped shape that cooperates with the exhaust seat ring outer wall.

Increase along with axial gas power and valve block impact force, above-mentioned exhaust seat ring is tightr with cooperating of cylinder cap, the axial pressure of balance also increases thereupon with it, avoid the loosening of exhaust seat ring and cylinder cap, can not increase simultaneously the matching allowance of exhaust seat ring and cylinder cap, avoid being out of shape the adverse effect that compressor reliability is brought.

Above embodiment is only for the usefulness that the utility model is described, but not to restriction of the present utility model, person skilled in the relevant technique, under the situation that does not break away from spirit and scope of the present utility model, can also make various conversion or modification, therefore all technological schemes that are equal to also should belong to category of the present utility model, should be limited by each claim.

Claims

1. the new exhaust seat ring structure of a rolling piston compressor, comprise the exhaust port on the cylinder cap of the rolling piston compressor that exhaust seat ring is connected with interference fit with it, it is characterized in that, described exhaust seat ring inwall is cylindrical, its outer wall is taper shape or stepped shape, and the exhaust port on the described cylinder cap is corresponding taper shape or the stepped shape that cooperates with the exhaust seat ring outer wall.