CN104454527A - Rotary compressor - Google Patents

Abstract

The invention provides a rotary compressor. The rotary compressor comprises a gas cylinder, a primary bearing, a secondary bearing, a crankshaft, a rotary piston and a slip sheet, wherein the gas cylinder is provided with a slip sheet slot; the primary bearing and the secondary bearing are fixed on the end surface of the gas cylinder; the crankshaft rotates in the primary bearing and the secondary bearing, and is provided with a crankshaft body; the rotary piston is held in the crankshaft body of the crankshaft in a free rotating manner; the slip sheet moves in the slip sheet slot back and forth, a plurality of diamond-shaped slots are formed in two end surfaces, opposite to the primary bearing and the secondary bearing, of the slip sheet. The rotary compressor disclosed by the invention can be used for enabling a gap between the two end surfaces opposite to the two bearings of the slip sheet and the two bearings to be equal, and can be used for keeping the two bearings of the slip sheet parallel, so that the volume effects can be improved due to reduction of leakage loss. Moreover, a part with a small local clearance is eliminated, the local friction of the slip sheet is eliminated and the reliability is improved while the sliding loss is reduced.

Description

Rotary compressor

Technical field

The present invention relates to a kind of rotary compressor of idle call.

Background technique

By Fig. 4, Fig. 5, Fig. 6, Fig. 7, structure is in the past described.In addition, in Fig. 7, arrow represents the leakage of refrigeration agent.

Seal container 1, motor part 2, the Machinery Ministry body 9 formed through bent axle 3 and cylinder 4, rotary-piston 5, slide plate 6, main bearing 7, supplementary bearing 8 is connected.In addition, slide plate 6 is accommodated in the vane slot 4a that is located in cylinder 4, and bent axle 3 is made up of main shaft 3a, countershaft 3b, crankshaft eccentric portion 3c.The center of bent axle 3 forms porose 30.10 is the springs being located at the slide plate back side.11 is the pressing chambers be made up of rotary-piston 5, slide plate 6, main bearing 7, supplementary bearing 8 in cylinder 4.12 is the oil supply structures be connected with bent axle 3.13 is be fixed on the suction pipe on supplementary bearing 8, is communicated with pressing chamber 11 through the suction passage 14a (not shown) of supplementary bearing 8, the suction passage 14b of cylinder 4.15 is that tap hole is communicated with seal container 1 through expulsion valve 16 (not shown).17 is that discharge tube opens in airtight cylinder 1.18 is lubricant oil.

In addition, motor part 2 is made up of rotor 2a and stator 2b, and rotor 2a is fixed with equilibrium block 2c, 2d.

Be inhaled into pipe 13 from refrigeration system (not shown) refrigerant gas out, suction passage 14a, 14b guide to pressing chamber 11 in cylinder 4.Arrive the refrigerant gas of pressing chamber 11, in the pressing chamber 11 divided by the rotary-piston be entrenched on the crankshaft eccentric portion 3c of bent axle 3 and slide plate 6, the rotation with motor part 2 is gradually compressed by the rotary motion of bent axle 3 and rotary-piston 5.Therefore, hyperbaric chamber 11a and low pressure chamber 11b can be there is in compression process.

By the refrigerant gas that compresses after the tap hole 15 of supplementary bearing 8, expulsion valve 16 are first discharged to seal container 1, be discharged to refrigerant system through discharge tube 17.

In addition, lubricant oil 18 passes through oil supply structure 12 to bent axle 3 and the slide part fuel feeding such as main bearing 7, supplementary bearing 8.

In addition, slide plate 6, by repeatedly moving at vane slot 4, drives face, slide plate back lining to be accumulated in lubricant oil 18 slide plate of seal container 1 to the slide part fuel feeding between vane slot 4a, main bearing 7 and supplementary bearing 8.

Summary of the invention

The reason such as cylinder or slide plate, the machining accuracy variation of two bearings or inclination when assembling in structure as above, need the gap between two of slide plate bearings two end faces vis-a-vis and the end face of two bearings that more than necessary distance is set (such as, for during refrigerator in 10 ~ 20um degree), if the little meeting in above-mentioned gap greatly increase slide plate and two bearings end between frictional loss.In addition, because 3 powers of the leakage rate and gap length that flow through the lubricant oil in this gap are proportional, therefore at slide plate when being partial to a certain bearing side, compared with when to remain between two bearings central with slide plate, leakage of oil amount reaches 4 times.Compressor is in running, the situation of carrying out back and forth movement due to slide plate under the state of a certain bearing side of deflection is more, therefore be discharged to the oil leak with high-temperature high-pressure refrigerant in seal container can increase to the amount of the hyperbaric chamber in cylinder or low pressure chamber through this gap, there is the defect reducing volumetric efficiency and compressor efficiency.

In addition, the rotatable rotary-piston be accommodated on bent axle is more relative to the situation of the end slope of main bearing, supplementary bearing, and two end faces of relative two bearings of the slide plate that front end contacts with rotary-piston also can tilt relative to two bearing faces.For this reason, between slide plate and two bearings, produce the less part in locality gap, exist because slippage loss lowers efficiency, the problem of locality abrasion unreliability.

The object of the invention is to solve the defect in above-mentioned conventional art, a kind of compressor is proposed, make compressor operationally, to reduce through the gap between slide plate and the end face of two bearings to the hyperbaric chamber in cylinder, low pressure chamber flows into the amount of lubricant oil containing refrigeration agent, improve the efficiency of compressor, and the slippage loss reduced between slide plate and two bearings, improve efficiency and the reliability of compressor.

Rotary compressor of the present invention, comprising: the cylinder with vane slot; Be fixed on the main bearing on cylinder end face and supplementary bearing; Rotational slide in main bearing and supplementary bearing, and the bent axle with bent axle; The rotatable rotary-piston be accommodated in the bent axle of bent axle; In vane slot cylinder, carry out back and forth movement, and the both ends of the surface faced toward with described main bearing and supplementary bearing have the slide plate of multiple rhombus groove.

According to above-mentioned rotary compressor of the present invention, when the slide plate be housed in vane slot moves repeatedly, lubricant oil inflow is located in the rhombus groove in the both ends of the surface of relative two bearings, the rhombus front section in this groove reduces sectional area to produce pressure.Produce this pressure in the upper and lower end face of slide plate, slide plate is maintained on the equilibrium position of the pressure that upper and lower end face produces simultaneously.I.e. gap smaller between slide plate end face and bearing face, can be increased in the pressure that slide plate end face produces, slide plate be charged back another bearing side, and the pressure that gap becomes conference minimizing generation makes slide plate close to bearing side.Therefore, it is possible to two gaps between two end faces of relative two bearings of slide plate and two bearings are kept identical state substantially.And, by arranging multiple groove on slide plate back and forth movement direction, make slide plate end face not need can keep probably parallel state with two bearing face relative tilts.

In addition; for 1 rhombus groove, because slide plate often can produce pressure when carrying out back and forth movement, the pressure therefore produced at slide plate end face becomes even; and the generation place of pressure also can be roughly the same, relative two bearing faces of slide plate end face better keeping parallelism can be enable.

Thus, by the gap between slide plate and metal (upper is kept impartial, the flow in the low pressure chamber flow into by the lubricant oil containing the High Temperature High Pressure in seal container through this gap in cylinder, hyperbaric chamber can be reduced, the abrasion of slide plate can be reduced simultaneously, improve reliability.

Accompanying drawing explanation

Fig. 1 represents the amplification profile of the Machinery Ministry of the rotary compressor of one embodiment of the invention;

Fig. 2 represents the plan view of slide plate of the present invention;

Fig. 3 represents the oil pressure change curve in gap between slide plate and pressing plate;

Fig. 4 represents the amplification profile of the Machinery Ministry of rotary compressor in the past;

Fig. 5 represents the longitudinal sectional drawing of rotary compressor in the past;

Fig. 6 represents the line view of the I-I ' line of Fig. 5;

Fig. 7 represents the enlarged view of Fig. 6 rotary compressor.

Label declaration

3 bent axles

3c crankshaft eccentric portion

4 cylinders

4a vane slot

5 rotary-pistons

7 main bearings

8 supplementary bearings

19 slide plates

19a, 19b slide plate end face

20 ~ 27 rhombus grooves

Embodiment

Below by way of Fig. 1, Fig. 2, Fig. 3, one embodiment of the present of invention are described.In addition, identical with embodiment in the past part is designated as identical symbol, and the description thereof will be omitted.

19 is slide plates, and the end face 19a of this main bearing 7 side arranges rhombus groove 20,21,22,23.Similarly, the end face 19b of supplementary bearing 8 side arranges rhombus groove 24,25,26,27.

In said structure, slide plate 19 is accommodated in the vane slot 4a that is located on cylinder 4, carries out back and forth movement in rotary compressor running with the state of storage.Now, flow on the lubricant oil 18 in seal container 1 and soak slide plate 19 to lubricate slide plate.

First, the situation of slide plate 19 to the central motion of cylinder 4 is described.Now, along with slide plate 19 moves to the central side of cylinder 4, the lubricant oil 18 in the rhombus groove 20,21,22,23 that the end face 19a of main bearing 7 side of slide plate 19 is arranged, is directed into sealed department 20a, 21a, 22a, 23a.And the wedge effect be guided in the process of sealed department 20a, 21a, 22a, 23a makes the pressure increase of lubricant oil 18.Similarly, the end face 19b of supplementary bearing 8 side of slide plate 19 also by rhombus groove 24,25,26,27, can make the pressure increase of lubricant oil 18.

Next slide plate 19 is described from the central side of cylinder 4 to the situation of the spring 10 side movement be located at slide plate 19 back side 19c.Now, because sealing slide plate 19 moves to spring 10 side, the lubricant oil 18 in the rhombus groove 20,21,22,23 that the end face 19a of slide plate 19 is arranged, is directed into sealed department 20b, 21b, 22b, 23b.And the wedge effect be guided in the process of sealed department 20b, 21b, 22b, 23b makes the pressure increase of lubricant oil 18.Similarly, the end face 19b of supplementary bearing 8 side of slide plate 19 also can be made the pressure increase of lubricant oil 18 by rhombus groove 24,25,26,27.

In addition, the gap delta a between the end face 19a of slide plate 19 and main bearing 7, and the gap delta b between the end face 19b of slide plate 19 and supplementary bearing 8 keeps δ a=δ b.This is because the oil pressure of the upper generation of the both ends of the surface 19a of slide plate 19,19b is identical respectively.Such as, gap delta a and δ b is unequal, during δ a> δ b, the oil pressure that the oil pressure of the end face 19a generation of slide plate 19 produces than the end face 19b of slide plate 19 is little, therefore slide plate 19 moves to main bearing 7 side, and gap delta a diminishes, and the oil pressure produced at end face 19a increases.And in the position of the oil pressure balance that bi-side 19a, 19b produce, namely slide plate 19 remains on the position of δ a=δ b.

In addition, due to the pressure that rhombus groove 20 ~ 27 produces, being roughly the same with the pressure when moving to spring 10 side when slide plate 19 moves to the center of cylinder 4, therefore usually can producing certain pressure by 1 rhombus groove.For this reason, though end face 19a, 19b of slide plate 19 are upper usually can produce certain pressure when odd number rhombus groove is set while, pressure can be produced in the place that be roughly the same.And, by being arranged on both ends of the surface 19a, the 19b of slide plate 19 by multiple rhombus groove 20 ~ 27, can make both ends of the surface 19a, 19b can keeping parallelism better for the end face of two bearings 7,8.

Its result, can reduce to greatest extent and leak through the gap between end face 19a, 19b of slide plate 19 and main bearing 7, supplementary bearing 8 lubricant oil comprising refrigeration agent to pressing chamber 11, improve volumetric efficiency.In addition, because end face 19a, 19b of slide plate 19 is relative to two bearings 7,8 keeping parallelism state often, the part that locality gap is less can be eliminated, while slippage loss can be reduced, eliminate the locality abrasion of end face 19a, 19b of slide plate 19, improve reliability.

Can learn according to the above description, by comprising the cylinder with vane slot; Be fixed on the main bearing on cylinder end face and supplementary bearing; Rotational slide in main bearing and supplementary bearing, and the bent axle with bent axle; The rotatable rotary-piston be accommodated in the bent axle of bent axle; Repeatedly move in vane slot, and the both ends of the surface faced toward with main bearing and supplementary bearing have the rotary compressor of the slide plate of multiple rhombus groove, can be impartial by the gap between both ends of the surface relative for two of a slide plate bearing and two bearings, and can keeping parallelism, the loss that therefore can reduce leakage improves volume effect.In addition, owing to eliminating the less part in locality gap, while reducing slippage loss, eliminate the locality abrasion of slide plate, improve reliability.

Claims (1)

1. a rotary compressor, comprising:

Cylinder, has vane slot in described cylinder;

Slide plate, described slide plate is located in described vane slot movably;

Main bearing, described main bearing is located at above described cylinder;

Supplementary bearing, described supplementary bearing is located at below described cylinder;

Bent axle, described bent axle runs through described main bearing and described supplementary bearing, and described bent axle is arranged with piston;

It is characterized in that: on the surface of contact of described slide plate and main bearing and/or supplementary bearing, offer multiple rhombus groove.