CN101749230A

CN101749230A - Rolling ring piston structure of rolling piston compressor

Info

Publication number: CN101749230A
Application number: CN200810154280A
Authority: CN
Inventors: 田亮
Original assignee: LG Electronics Tianjin Appliances Co Ltd
Current assignee: LG Electronics Tianjin Appliances Co Ltd
Priority date: 2008-12-19
Filing date: 2008-12-19
Publication date: 2010-06-23

Abstract

The invention relates to a rolling ring piston structure of a compressor, which comprises a rolling ring piston, wherein the inner circumferential face of the rolling ring piston is provided with a recess part, the outer circumferential face of the rolling ring piston is in the shape of a circular ring, and an opening of the recess part at the inner circumferential face is towards the axial lead of a rolling ring. The rolling ring piston is arranged in a cavity body of an air cylinder of the compressor and is sleeved on the eccentric diameter of a crankshaft inserted into the cavity body of the air cylinder. More lubricating oil is filled in the recess part arranged at the inner circumferential face of the rolling ring piston, which can fully lubricate a space between the crankshaft and the rolling ring piston, is beneficial to heat radiation and increases the working life of the air cylinder and the rolling ring piston. Moreover, by the arrangement of the recess part at the inner circumferential face of the rolling ring piston, the contact area and the mechanical friction among the piston, the crankshaft, an upper bearing and a lower bearing are decreased, the vibration of a rotary part is decreased, and the performance of the compressor is enhanced. Meanwhile, the sizes and the volumes of the rolling ring piston, the crankshaft and a rotor counterbalance can also be decreased, which is beneficial for lowering production cost.

Description

The ring piston structure of rolling of rolling piston compressor

Technical field

The present invention relates to compressor, particularly relate to the rolling piston of rolling piston compressor.

Background technique

Compressor is the important composition parts that air conditioner, refrigerator etc. utilize the household electric appliance of cooling cycle system work.In general, compressor utilizes its parts that move under driven by motor (rolling piston or reciprocating piston etc.) to change mechanical energy into the pressure energy, realization is to the compression of compresser cylinder inner refrigerant, and refrigerant compressed is discharged compressor enters cooling cycle system and carry out refrigeration cycle and flow.

Compressor commonly used mainly contains Reciprocting piston compressor, rotary compressor etc.Rolling piston compressor is modal rotary compressor, directly goes up the rolling of annular piston by being enclosed within crankshaft eccentric, finishes compression and exhaust process in cylinder.Rolling piston compressor has characteristics such as volume is little, simple in structure, running is steady, noise is low, especially can adapt to variable parameter operation, so it is widely used on the air conditioner.

Fig. 1 shows the basic structure of the rolling piston compressor of using on a kind of air conditioner.As shown in Figure 1, compressor is a vertical structure, and housing 1 is cylindric, and the bottom of housing 1 is fixed on the chassis 11 of air conditioner.The compressor section of compressor and motor section are arranged in the cylindrical shell, and compressor section is located at lower part of frame, and motor section is located at the top of housing.

Compressor section mainly comprises upper bearing (metal) 6, lower bearing 9 and cylinder 8.Upper bearing (metal) 6 and lower bearing 9 are made and are formed cavity in the cylinder 8 by the both sides up and down that are bolted to cylinder 8.Piston 7 is set in the cylinder cavity, and piston 7 is circular, and piston 7 is enclosed within bent axle 5 and inserts on the interior eccentric footpath of cylinder cavity.The eccentric footpath of bent axle 5 drives piston 7 and rolls in the cylinder cavity, enters refrigeration agent in the cylinder cavity with compression from suction tude 10.

The other end of bent axle 5 inserts in the rotor 4 of motor section motor.Motor is made up of stator 3 and rotor 4, and stator 3 and rotor 4 are made of the iron core that the folded collection of silicon steel core sheet forms respectively.Rotor 4 is cylindric, directly is pressed on the bent axle 5 and inserts in the cylinder cavity of stator iron core, has air gap to be separated by between rotor 4 and the stator 3.Embed the winding of enameled cable coiled on the stator 3, staor winding outside source current by the time produce magnetic field.Rotor 4 with the magnetic field interaction of stator 3, produces electromagnetic torque and rotation in stator 3 when having electric current to pass through.The rotation of rotor 4 drives the bent axle 5 that inserts in the cylinder 8 lower end and rotates.

During compressor operation, the rotation of rotor 4 drives cylinder 8 inner carriers 7 by bent axle 5 and rolls, and the piston 7 of rolling is finished the compression and the exhaust process of refrigeration agent in the cylinder cavity.Refrigeration agent enters cylinder from the suction tude 10 of compressor housing one side, is compressed the back and discharges from relief opening in the cylinder cavity, discharges compressor housing from the outlet pipe 2 on housing top then.

The structure of compressor section cylinder cavity inner carrier 7 in Fig. 2 displayed map 1.Piston 7 is circular, is one and rolls ring, is enclosed within on the eccentric footpath of inserting cylinder cavity inside crankshaft 5.During compressor operation, circular piston 7 drives lower edge cylinder cavity inner wall in the eccentric footpath of bent axle 5 and rolls.

The compressor piston of above-mentioned prior art is one and rolls ring, rolls the ring inner peripheral surface and directly cooperates with crankshaft eccentric and require more highi degree of accuracy, makes the processing operation increase difficulty of rolling the ring inner peripheral surface.And the friction of rolling ring and bent axle increases mechanical loss, influences the dynamic balancing of rotor portion, and the performance of compressor is exerted an influence.

Summary of the invention

At the compressor Rotary disc type piston of above-mentioned prior art exist the processing operational difficulty and with the problems such as frictional influence compressor performance of bent axle, what the present invention released that inner peripheral surface is provided with depressed part rolls the ring piston, reduce the area of contact of piston and bent axle, increase and roll the middle lubricant oil of ring piston, reduce the friction between piston and bent axle and the bearing, improve the performance and the working life of compressor.

The ring piston structure of rolling of compressor involved in the present invention comprises that inner peripheral surface is provided with depressed part, outer circumferential face and is the circular ring piston that rolls, inner peripheral surface depressed part uncovered towards the shaft axis that rolls ring.Roll the ring piston and be arranged in the cylinder of compressor cavity, be enclosed within on the crankshaft eccentric footpath of inserting in the cylinder cavity.Roll the depressed part of ring piston inner peripheral surface setting and can fill more lubricant oil, make bent axle and roll between the ring piston sufficient lubrication and help heat radiation, increase cylinder and roll the operating life of encircling piston.And the setting of rolling ring piston inner peripheral surface depressed part reduces area of contact and mechanical friction between piston and bent axle and the upper and lower bearing, reduces the vibration of rotating part, improves the performance of compressor.Simultaneously, the size and the volume that roll ring piston, bent axle and balancing rotor piece are reduced, help reducing production costs.

Description of drawings

Fig. 1 is the basic structure schematic representation of the rolling piston compressor of prior art.

Fig. 2 is the piston structure schematic representation of compressor shown in Figure 1.

Fig. 3 is a ring piston structure of rolling schematic representation of the present invention.

Fig. 4 is arranged on the interior schematic representation of compresser cylinder cavity for the ring piston that rolls of the present invention.

Description of symbols among the figure:

1, housing 2, outlet pipe

3, stator 4, rotor

5, bent axle 6, upper bearing (metal)

7, piston 8, cylinder

9, lower bearing 10, suction tude

11, chassis 12, roll the ring piston

13, depressed part

Embodiment

Now further specify specific embodiments of the invention in conjunction with the accompanying drawings.

Fig. 3 and Fig. 4 have shown and of the present inventionly roll the ring structure of piston and be arranged on state in the compresser cylinder cavity.

As shown in Figure 3 and Figure 4, the ring piston structure of rolling of compressor involved in the present invention, comprise inner peripheral surface be provided with depressed part 13 roll that ring piston 12 rolls ring piston 12 inner peripheral surfaces equidistant 4 depressed parts 13 are set.Roll ring piston 12 outer circumferential faces and be circular, inner peripheral surface depressed part uncovered towards the shaft axis that rolls ring.Roll ring piston 12 and be assemblied in the cylinder of compressor cavity, be enclosed within on the eccentric footpath of the bent axle 5 that inserts in the cylinder cavity.Roll in the depressed part 13 that encircles the setting of piston inner peripheral surface and be full of lubricant oil.The compresser cylinder cavity of ring piston 12 is rolled in setting, upper bearing (metal) and lower bearing 9 are fixed on the both sides up and down of cylinder 8 and are formed by bolt.

During compressor operation, the rotation of rotor is rolled by rolling ring piston 12 in the bent axle 5 drive cylinders 8, and the piston 12 of rolling is finished the compression and the exhaust process of refrigeration agent in the cylinder cavity.Refrigeration agent is gone into cylinder from the suction tude of compressor housing one side, is compressed the back and discharges from relief opening in the cylinder cavity, discharges compressor housing from the outlet pipe on housing top then.

Claims

1. the ring piston structure of rolling of a rolling piston compressor, it is characterized in that, comprise that inner peripheral surface is provided with depressed part, outer circumferential face and is the circular ring piston that rolls, roll the ring piston and be arranged in the cylinder of compressor cavity, be enclosed within on the eccentric footpath of the bent axle that inserts in the cylinder cavity.

2. the ring piston structure of rolling of rolling piston compressor according to claim 1 is characterized in that, described inner peripheral surface depressed part uncovered towards the shaft axis that rolls ring that rolls the ring piston.

3. the ring piston structure of rolling of rolling piston compressor according to claim 2 is characterized in that, is full of lubricant oil in the described depressed part of inner peripheral surface setting that rolls the ring piston.

4. the ring piston structure of rolling of rolling piston compressor according to claim 2 is characterized in that, the described inner peripheral surface that rolls the ring piston is equidistant to be provided with 4 depressed parts.