JPH08210283A - Rotary type compressor - Google Patents

Abstract

PURPOSE: To prevent a spring from being damaged owing to friction between a vane and a groove part by a method wherein a taper is formed on the mounting hole in the opposite piston side of a vane to which a vane spring is attached and the bent part of the insertion part of a vane spring is set to the outside of a mounting hole. CONSTITUTION: A gas refrigerant compressed by a piston 5 along with rotation of a shaft 6 is delivered from a compression mechanism part 1, and works as a delivery pressure on the opposite piston side of a vane 4. By the delivery pressure thereof and the spring force of a vane spring 8, the vane 4 is pressed against the piston 5. Along with movement of the piston 5, the vane 4 performs reciprocating movement. Along with the reciprocating movement, the vane spring 8 effects expansion movement and the insertion part 8a of the vane spring 8 effects whirling movement. The tip of the insertion part 8a of the vane spring 8 is fixed to a Teflon 10 and swirled therearound and the length of the insertion part 8a of the vane spring 8 is set in such a manner that the bent part 8b of the vane spring 8 is moved to the outside of the inlet part 9b of a mounting hole 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary compressor used in an air conditioner or the like.

[0002]

2. Description of the Related Art Conventionally, a rotary compressor of this type is constructed as shown in FIGS. 4 to 7, as disclosed in Japanese Patent Laid-Open No. 64-3289.

The stator 13 and the rotor 1 are housed in a closed container.
4, a shaft 15 which rotates by this motor, a cylinder 16 which forms a compression chamber, a motor side plate 17 and a non-motor side plate 18 which are in close contact with both surfaces of this cylinder 16, and the inside of the compression chamber. It comprises a roller 19 which is in contact with and eccentrically rotated, a vane 20 whose tip portion presses against the roller 19 to partition the compression chamber into high and low pressure sides, and a compression device 22 having a spring 21 which presses the vane 20 against the roller 19. The spring 21 has an arcuate planar shape, and the side surface is formed into a substantially U shape having a connecting portion 23 at one end and engaging portions 24 at both open ends. 24 is engaged with two groove portions 25 formed on the end surface of the vane 20 opposite to the roller 19, and the connecting portion 23 is substantially attached to the vane 20 on the outer peripheral surface of the cylinder 16. It is characterized in that engaged with the engaging portion 26 provided on the counter position.

In the above structure, the rotation of the rotor 14 is transmitted to the shaft 15, the roller 19 fitted in the eccentric portion is eccentrically rotated in the compression chamber, and the vane 20 is pressed against the roller 19 by the spring 21. The compression chamber is on the high pressure side,
By being partitioned into the low-pressure side, the gas sucked from the suction pipe is discharged from the discharge valve, released to the discharge muffler, and then discharged from the discharge pipe released into the closed container.

The spring 21 has two arcuate receiving portions provided at both open ends of the spring 21 with respect to the extending and contracting direction, and always applies a stable and uniform elastic pressing force to the groove portion provided on the side surface of the vane 20. It was done. Therefore spring 2
1 does not cause interference with other parts in the vicinity including the cylinder 16. Further, the assembly is performed by bringing the arcuate engagement portions of both open ends of the spring 21 into contact with the vane groove portion,
Is extended in the direction of expansion and contraction, and the connecting portion bent in a U-shape is simply engaged with the locking portion provided on the outer peripheral surface of the cylinder 16, so that the assembling property is extremely easy.

[0006]

However, in the above structure, the reciprocating motion of the vane 20 causes friction between the engaging portion of the spring 21 and the edge of the groove to wear the engaging portion of the spring 21. When operated for a certain period, there is a problem that the engaging portion of the spring 21 is broken and cannot be compressed. Further, since the arcuate engagement portion of the spring 21 is brought into contact with the groove portion of the vane 20, the cylinder 16
It is necessary to reduce the thickness of the flange portion of the above, and be careful so as not to come off even when the spring 21 is attached to the vane 20. In addition, during defrosting operation in which the lubricating oil is insufficient and during bed start-up operation, oil film breakage occurs at the contact portion between the engaging portion of the spring 21 and the groove portion of the vane 20, and wear is accelerated. Further, when jumping occurs due to insufficient back pressure of the vane 20 at the time of restart, contact between the engagement portion of the spring 21 and the groove portion of the vane 20 becomes one point, and wear is promoted. Further, when excessive jumping occurs due to liquid compression, the engaging portion of the spring 21 is disengaged from the groove portion of the vane 20, and noise or incompression occurs due to malfunction of the vane 20.

In view of the above-mentioned problems, the present invention provides the vane 2
It is intended to provide a highly reliable rotary compressor capable of preventing breakage of the spring 21 due to friction with a 0 groove portion.

[0008]

In order to solve the above problems, a rotary compressor according to the present invention comprises a cylinder, a piston eccentrically rotating along the inner wall of the cylinder, and a compression chamber inside the cylinder that abuts on the piston. It consists of a vane that separates into the suction chamber and a vane spring that presses the vane to the entrance of the mounting hole on the anti-piston side of the vane to which the vane spring is attached. The bent portion of the insertion portion is set outside the mounting hole.

Further, according to the present invention, a cushioning material is provided at the bottom of the mounting hole. Further, according to the present invention, a wear resistant material is provided at the bottom of the mounting hole.

Further, according to the present invention, a solid lubricant is applied to the mounting hole or the insertion portion of the vane spring.

The rotary compressor according to the present invention includes a cylinder, a piston that eccentrically rotates along the inner wall of the cylinder, a vane that abuts the piston and separates the inside of the cylinder into a compression chamber and a suction chamber, and presses the vane against the piston. It is composed of a vane spring, and a bush is provided at a portion where the vane spring is attached to the vane.

Further, the present invention uses an elastic bush. Further, the present invention uses a bush containing a solid lubricant.

Further, the present invention uses a tapered bush. The rotary compressor of the present invention includes a cylinder, a piston that eccentrically rotates along an inner wall of the cylinder,
It comprises a vane that abuts the piston and separates the inside of the cylinder into a compression chamber and a suction chamber, and a vane spring that presses the vane against the piston, and the portion of the vane to which the vane spring is attached is made of a porous material.

Further, according to the present invention, the piston side of the vane is made of a dense material.

[0015]

According to the present invention, with the above-described structure, the vane spring is received at the bottom of the mounting hole formed in the vane, and the inlet of the mounting hole is made larger than the swinging range of the insertion portion of the vane spring due to the reciprocating motion of the vane. The insertion part of the vane spring and the entrance of the mounting hole of the vane spring are prevented from hitting each other.

According to the present invention, with the above-mentioned structure, a shock absorbing material is provided at the bottom of the mounting hole to reduce the impact when the vane spring is mounted.

According to the present invention having the above-mentioned structure, a wear resistant material is provided at the bottom of the mounting hole to prevent the bottom of the mounting hole from being worn.

According to the present invention, the solid lubricant is applied to the mounting holes of the vane springs or the insertion portions of the vane springs by the above-mentioned constitution to prevent the wear due to the contact between the insertion portions of the vane springs and the mounting holes when excessive jumping occurs. It is a thing.

According to the present invention, the bush is inserted into the insertion portion of the vane spring to prevent direct friction between the mounting portion of the vane spring and the mounting hole of the vane.

According to the present invention, the elastic bush is used to absorb the large whirling of the vane spring caused by jumping.

According to the present invention, with the above structure, the bush containing the solid lubricant is used to prevent the wear of the mounting hole and the vane spring when the lubricating oil is insufficient.

According to the present invention, the vane spring can be easily attached by using the tapered bush with the above-mentioned structure.

According to the present invention, the vicinity of the mounting hole of the vane spring of the vane is made of a porous material by the above constitution,
This is to prevent wear of the vane spring.

The present invention is configured as described above to reduce the friction on the side surface of the vane by the dense material.

[0025]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A rotary compressor according to an embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a vertical sectional view of a compression mechanism portion of a rotary compressor according to a first embodiment of the present invention.

The first object of the present invention is to receive the vane spring 8 at the bottom 9a of the mounting hole 9 formed in the vane 4, and to allow the reciprocating motion of the insertion portion 8a of the vane spring 8 to swing around the mounting hole entrance portion. 9b is enlarged so that the insertion portion 8a of the vane spring 8 does not hit the inlet portion 9b of the mounting hole 9 of the vane spring 8, and the second purpose is to attach the cushioning material 10 to the bottom portion 9a of the mounting hole 9. The purpose is to reduce the impact when the vane spring 8 is attached, and the third purpose is to provide the bottom 9a of the attachment hole 9.
A wear-resistant material 10 is provided to prevent wear of the bottom 9a of the mounting hole 9. The fourth purpose is to apply a solid lubricant to the mounting hole 9 of the vane spring 8 or the insertion part of the vane spring 8. The purpose is to prevent wear caused by the contact between the insertion portion of the vane spring 8 and the mounting hole 9 when excessive jumping occurs.

Reference numeral 1 is a compression mechanism portion of the rotary compressor. A vane 4 is inserted in the vane groove 3 of the cylinder 2.
The piston 5 is fitted in the eccentric portion 7 of the shaft 6, and rotates eccentrically along the inner wall of the cylinder 2 as the shaft 6 rotates. The vane 4 abuts the piston 5 and reciprocates inside the vane groove 3, and separates the inside of the cylinder 2 into a suction chamber and a compression chamber. Reference numeral 8 denotes a vane spring, one end of which is attached to the attachment hole 9 of the vane 4 and the other end of which is attached to the side opposite to the vane 4 of the cylinder 2 to press the vane 4 against the piston 5.
The bottom 9a of the mounting hole 9 of the vane 4 is a cushioning material,
Teflon 10, which is a wear resistant material, is fixed. Further, the mounting hole 9 has a taper 9c so that the entrance 9
The size of b is set to be larger than the swing range of the insertion portion 8a of the vane spring 8. Bent portion 8b of vane spring 8
The length of the insertion part 8a of the vane spring 8 is set so that the position is outside the entrance 9b of the mounting hole 9. further,
A solid lubricant 10 is applied to the insertion portion 8a of the vane spring 8.

The operation of the rotary compressor configured as described above will be described. The gas refrigerant compressed by the piston 5 in accordance with the rotation of the shaft 6 is discharged from the compression mechanism portion 1 and acts as a discharge pressure on the side opposite to the piston of the vane 4. Due to the discharge pressure and the spring force of the vane spring 8, the vane 4 causes the piston 5 to move. Pressed against. The vane 4 reciprocates as the piston 5 moves. Along with this, the vane spring 8 expands and contracts, and the insertion portion 8a of the vane spring 8 swings around. The tip of the insertion portion 8a of the vane spring 8 is fixed to the Teflon 10 and swings around it. However, since the size of the entrance portion 9c of the mounting hole 9 is set to be larger than the swinging range, the bending of the vane spring 8 is prevented. Part 8b
Since the length of the insertion portion 8a of the vane spring 8 is set so that the insertion portion 8a is outside the entrance portion 9b of the mounting hole 9, the insertion portion 8a of the vane spring 8 must move without hitting the entrance portion 9a of the mounting hole 9. You can

Next, the effect will be described. Since the insertion portion 8a of the vane spring 8 does not hit the entrance portion 9b of the mounting hole 9 during operation, breakage of the vane spring 8 can be prevented. As a result, a highly reliable rotary compressor can be provided. Further, since the Teflon 10 is inserted into the bottom portion 9a of the mounting hole 9, not only can the vane spring 8 be easily attached at the time of assembly, but also the bottom portion 9a of the mounting hole 9 at the time of defrosting operation in which lubricating oil is insufficient. Wear can be prevented. As a result, high-speed defrosting is possible, and a short-time defrosting can provide an air conditioner with high heating capacity and good comfort during defrosting operation. In addition, the insertion portion 8a of the vane spring 8
Since the solid lubricant 11 is applied to the inner surface of the vane spring 8, it is possible to prevent wear caused by the contact between the insertion portion 8a of the vane spring 8 and the mounting hole 9 which occurs when the vane 8 jumps largely due to the liquid compression during the starting operation. As a result, it is possible to provide an air conditioner in which a high-speed start is possible and an air conditioning temperature rises quickly.

The above-mentioned actions and effects are due to wear resistance of a cushioning material such as rubber, a porous oil-containing material such as a sintered material, or a composite material of a solid lubricant and a resin material (polyamideimide and MoS ₂ , graphite, etc.). The same can be obtained by using the material.

A second embodiment of the present invention will be described.
FIG. 2 is a vertical sectional view of a rotary compressor according to a second embodiment of the present invention. Here, the same components as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

A first object of the present invention is to insert a bush 12 into the insertion portion 8a of the vane spring 8 to prevent direct friction between the mounting portion of the vane spring 8 and the mounting hole 9 of the vane 4, The second purpose is to use a bush 12 made of an elastic material to make the vane spring 8 generated by jumping.
The third purpose is to prevent wear of the mounting hole 9 and the vane spring 8 when the lubricating oil is insufficient, by using the bush 12 containing a solid lubricant. 4 purpose is a tapered bush 1
2 is used to facilitate the attachment of the vane spring 8.

A bush 12 is attached to the insertion portion 8b of the vane spring 8 and is inserted into the attachment hole 9 of the vane 4. The bush 12 is made of a resin material that is elastically deformable, contains a solid lubricant, and is further tapered so that the diameter of the tip of the insertion portion is small.

The operation of the rotary compressor configured as described above will be described. The vane 4 reciprocates as the piston 5 moves. Along with this, the vane spring 8 expands and contracts, and the insertion portion 8a of the vane spring 8 swings around. Although the bush 12 moves with respect to the mounting hole 9 due to the whirling of the vane spring 8, since the whirling is mainly absorbed by the bush 12 of the insertion portion 8a of the vane spring 8, the bushing 12 has the insertion portion 8a and the mounting hole 9 attached. Is not overloaded.

Next, the effect will be described. During operation, since the vane spring 8 and the mounting hole 9 do not directly rub, the vane spring 8 can be prevented from being broken. As a result, a highly reliable rotary compressor can be provided. Furthermore, the vane spring 8 and the vane 4 due to excessive whirling that occurs when large jumping occurs due to liquid compression during startup and restart operation.
It can prevent hitting. As a result, it is possible to provide an air conditioner in which a high-speed start is possible and an air conditioning temperature rises quickly. Also, during defrosting operation when the lubricating oil is insufficient, the bush 1
The solid lubricant contained in 2 can prevent wear of the vane spring 8 and the mounting hole 9. As a result, high-speed defrosting is possible, and a short-time defrosting can provide an air conditioner with high heating capacity and good comfort during defrosting operation. Further, the vane spring 8 can be easily attached during assembly.

The above-described actions and effects are obtained even if the bush material is a porous oil-containing material, a composite material of a solid lubricant (MoS ₂ , graphite) and a resin material, or the mounting hole 9 has a constant diameter. It is also obtained.

A third embodiment of the present invention will be described.
FIG. 3 is a transverse sectional view of a rotary compressor according to a third embodiment of the present invention. Here, the same components as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

A first object of the present invention is to prevent the wear of the vane spring 8 by forming the vane spring 8 of the vane 4 in the vicinity of the mounting hole 9 of the vane spring 8 with a porous material. The material reduces friction on the side surface of the vane.

The vane 4 is a composite material composed of a porous material and a dense material. The mounting hole 9 side of the vane spring 8 is made of a porous material 4a, and the piston 5 side is made of a dense material 4b.
Is. Chamfer 9 at the entrance of mounting hole 9 of vane 4
The insertion portion 8a of the vane spring 8 is attached to d.

The operation of the rotary compressor configured as described above will be described. The vane 4 reciprocates as the piston 5 moves. Along with this, the vane spring 8 expands and contracts, and the insertion portion 8a of the vane spring 8 swings around. The swirling of the vane spring 8 causes friction between the insertion portion 8a of the vane spring 8 and the chamfer 9d of the mounting hole 9, but is lubricated by the oil impregnated in the porous material 4a. Further, the dense material 4b holds an oil film on the side surface of the vane 4.

Next, the effect will be described. During operation, the insertion portion 8a of the vane spring 8 and the mounting hole 9 are lubricated with oil, so that wear of the vane spring 8 can be prevented. As a result, a highly reliable rotary compressor can be provided. Further, the oil impregnated in the porous material can prevent the vane spring 8 and the mounting hole 9 from being worn even during a transient operation such as a start operation or a defrosting operation where the lubrication is severe. As a result, high-speed start-up and high-speed defrosting are possible, and an air conditioner with a high comfort and a high heating capacity during defrosting operation can be provided because the air conditioning temperature rises quickly and defrosting is performed for a short time. Further, the high oil film holding force of the material on the piston 5 side can suppress the power loss generated on the side surface of the vane 4, and a highly efficient rotary compressor can be provided.

[0043]

As described above, according to the present invention, a cylinder, a piston that eccentrically rotates along the inner wall of the cylinder, a vane that abuts the piston and separates the inside of the cylinder into a compression chamber and a suction chamber, and a vane is provided on the piston. It consists of a pressing vane spring, and the mounting hole on the anti-piston side of the vane for mounting the vane spring is tapered, and the bent part of the insertion part of the vane spring is set outside the mounting hole to prevent the vane spring from breaking. It is possible to provide a highly reliable rotary compressor.

The present invention can provide a rotary compressor in which the vane spring can be easily attached during assembly.

The present invention can prevent abrasion of the bottom of the mounting hole during the defrosting operation in which the lubricating oil is insufficient, enable high-speed defrosting, and have a high heating capacity and a comfortable defrosting operation during the defrosting operation. An air conditioner with good properties can be provided.

According to the present invention, it is possible to prevent the wear due to the contact between the insertion portion of the vane spring and the mounting hole, which occurs when the vane largely jumps due to the liquid compression during the starting operation.
It is possible to provide an air conditioner that enables high-speed start and has a quick rise in air conditioning temperature.

The present invention can prevent breakage of the vane spring,
A highly reliable rotary compressor can be provided.

According to the present invention, it is possible to prevent the vane spring and the vane from hitting due to excessive whirling that occurs when large jumping occurs due to liquid compression at the time of starting and restarting operation, enabling high-speed starting, and quickly rising the air conditioning temperature. An air conditioner can be provided.

In the present invention, during defrosting operation in which lubricating oil is insufficient,
The solid lubricant contained in the bush prevents wear on the vane spring and mounting holes, enabling high-speed defrosting,
It is possible to provide not only an air conditioner having a high heating capacity during defrosting operation and having good comfort by defrosting for a short time, but also a rotary compressor in which a vane spring can be easily attached.

The present invention can provide a highly reliable rotary compressor which can prevent vane spring wear.

According to the present invention, the oil impregnated in the porous material can prevent the wear of the vane spring and the mounting hole even during a transient operation such as a start operation or a defrosting operation where the lubrication is severe, and a high speed starting and a high speed defrosting are possible. It is possible to provide an air conditioner that has a high heating capacity during defrosting operation and has a high level of comfort, because the air conditioning temperature rises quickly and defrosting is performed for a short time.

The present invention can suppress the power loss generated on the side surface of the vane by the high oil film holding force of the piston side material,
A highly efficient rotary compressor can be provided.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of a main part of a rotary compressor according to a first embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of a main part of a rotary compressor according to a second embodiment of the present invention.

FIG. 3 is a longitudinal sectional view of a main part of a rotary compressor according to a third embodiment of the present invention.

FIG. 4 is a vertical sectional view of a conventional rotary compressor.

FIG. 5 is a cross-sectional view of a conventional rotary compressor.

FIG. 6 is a sectional view of a main part of a conventional rotary compressor.

FIG. 7 is a perspective view of a main part of the spring and vane of FIG.

[Explanation of symbols]

 3 Cylinder 5 Vane 6 Piston 10 Lubricating Oil Supply Path 11 Flow Rate Control Means

Claims (10)

[Claims] 1. A cylinder, a piston that is eccentrically rotated along the inner wall of the cylinder, a vane that abuts the piston and separates the inside of the cylinder into a compression chamber and a suction chamber, and a vane spring that presses the vane against the piston. The rotary compressor, wherein a mounting hole on the side opposite to the piston of the vane for mounting the vane spring is tapered, and a bent portion of the insertion portion of the vane spring is set outside the mounting hole. 2. The rotary compressor according to claim 1, wherein a cushioning material is provided at the bottom of the mounting hole. 3. The rotary compressor according to claim 1, wherein an abrasion resistant material is provided at the bottom of the mounting hole. 4. The rotary compressor according to claim 1, wherein a solid lubricant is applied to the mounting hole or the insertion portion of the vane spring. 5. A cylinder, a piston that eccentrically rotates along the inner wall of the cylinder, a vane that abuts the piston and separates the inside of the cylinder into a compression chamber and a suction chamber, and a vane spring that presses the vane against the piston. The rotary compressor having a bush at the portion where the vane spring is attached to the vane. 6. The rotary compressor according to claim 5, wherein an elastic bush is used. 7. The rotary compressor according to claim 5, wherein a bush containing a solid lubricant is used. 8. The rotary compressor according to claim 5, wherein a tapered bush is used. 9. A cylinder, a piston that is eccentrically rotated along the inner wall of the cylinder, a vane that abuts the piston and separates the inside of the cylinder into a compression chamber and a suction chamber, and a vane spring that presses the vane against the piston. The rotary compressor in which the portion of the vane to which the vane spring is attached is made of a porous material. 10. The rotary compressor according to claim 9, wherein the piston side of the vane is made of a dense material.