JP2006118447A - Scroll compressor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem that a turning scroll part is strongly pressed against a stationary scroll part to cause abnormal wear of a scroll sliding part and increase of input since back pressure to keep the turning scroll part not being separated from the stationary scroll part is applied on the turning scroll part and that the turning scroll part and the stationary scroll part are easily seized when the same are strongly pressed against each other if the same is made of same metal. <P>SOLUTION: Super finishing such as buffing is applied on a turning end plate 4b of the turning scroll part 4. Consequently, sliding loss can be kept low even if the turning scroll part 4 is strongly pressed against the stationary scroll part 2, improvement of performance and assurance of reliability of the compressor can be compatibly materialized with suppressing abnormal wear. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention forms a compression chamber by meshing fixed swirl blades of fixed swirl parts and swirl swirl blades of swirl swirl parts, and the swirl swirl parts are arranged along a circular path under the rotation restraint by the rotation restraining mechanism. The present invention relates to a scroll compressor that performs suction, compression, and discharge by moving a compression chamber while changing its volume when swung.

Conventionally, this type of scroll compressor forms a compression chamber by meshing fixed swirl blades of fixed swirl components and swirl swirl blades of swirl swirl components, and the swirl swirl components are subjected to rotation restraint by a rotation restraint mechanism. When the cylinder is swung along a circular orbit, the compression chamber moves while changing its volume, thereby performing suction, compression, and discharge. In addition, a predetermined pressure is applied to the back surface of the swirl spiral component opposite to the swirl spiral blade so that the swirl spiral component is not separated from the fixed spiral component. In addition, the material of the fixed and swirl components that make up the scroll compressor is both iron-based mainly cast iron, or both aluminum-based, or iron-based swirl-vortex components. Some parts use an aluminum system (for example, see Patent Document 1).
JP 2000-186680 A

  However, in the above-described conventional configuration, the swirl swirl component is strongly pressed against the fixed swirl component so as to prevent the swirl swirl component from being separated from the fixed swirl component. This leads to wear and increased input. In the case where the swirl spiral part and the fixed spiral part are made of the same metal, there is a problem that if the metal is pressed strongly by back pressure, it is likely to be seized. On the other hand, the scroll compressor described in Patent Document 1 is provided with a thrust receiving mechanism that receives a pressing force acting on the swirl spiral component. The thrust receiving mechanism includes a cylindrical first rolling element that is rotatably held in one direction, and a cylindrical second rolling element that is rotatably held in a direction perpendicular to the one direction. Yes. With this configuration, since the contact area of the rolling elements can be increased, the durability of the compressor can be improved. However, since it is composed of a large number of parts, the noise during operation and the cost are increased.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a scroll compressor having high efficiency and high reliability while having a simple and low-cost configuration in order to solve the conventional problems. .

  A scroll compressor according to a first aspect of the present invention includes a fixed spiral component having a fixed spiral blade and a fixed end plate, a swirl spiral component having a swirl spiral blade and a swing end plate, the fixed spiral blade and the swirl. In a scroll compressor comprising a plurality of compression chambers formed by meshing swirl blades and a back pressure chamber provided on the opposite side of the swirl swirl blade surface of the swirl swirl component, the swivel end plate of the swirl swirl component It is characterized by super-finishing such as buffing. The present invention according to claim 2 is characterized in that the swirl spiral blade side end plate of the swirl spiral part is subjected to super finishing such as buffing. The present invention according to claim 3 is characterized in that super-finishing processing such as buffing is performed on the outer peripheral surface of the swirl spiral blade side end plate surface of the swirl spiral component. According to a fourth aspect of the present invention, in the scroll compressor according to the first to third aspects, the swirl spiral component has a higher surface hardness than the fixed spiral component. According to a fifth aspect of the present invention, in the scroll compressor according to the first to third aspects, a superfinishing process such as buffing is performed after a surface treatment is performed on the swirling spiral component. According to a sixth aspect of the present invention, in the scroll compressor according to the first to third aspects, the swirl spiral part is subjected to an alumite treatment as a surface treatment and then subjected to superfinishing such as buffing. . A seventh aspect of the present invention is the scroll compressor according to the fourth to sixth aspects, wherein, for example, a high-pressure gas such as carbon dioxide is used as a refrigerant.

  The scroll compressor of the present invention can reduce sliding loss even if the swirl spiral part is strongly pressed against the fixed swirl part by performing super finishing such as buffing on the swirl end plate of the swirl swirl part. Therefore, it is possible to improve the performance of the compressor and ensure reliability while suppressing abnormal wear. Moreover, since the number of parts is not increased, the cost can be kept low without impairing the quietness during operation.

  According to the first aspect of the present invention, a superfinishing process such as buffing is performed on a swivel end plate of a swirl spiral part. According to the present embodiment, the surface roughness is improved by superfinishing such as buffing the swirl end plate of the swirl spiral part, and even if the swirl swirl part is strongly pressed against the fixed swirl part, the sliding loss is reduced. Therefore, the abnormal wear can be suppressed and both the improvement of the compressor performance and the reliability can be achieved. Moreover, since the number of parts is not increased, the cost can be kept low without impairing the quietness during operation.

  In particular, in the scroll compressor according to the first aspect of the present invention, the swirl spiral blade side end plate of the swirl spiral component is subjected to super finishing such as buffing. According to this embodiment, while reducing the sliding loss of the sliding surface with the fixed spiral component, it is possible to suppress abnormal wear and achieve both improvement in compressor performance and reliability.

  In the scroll compressor of the first or second invention, the third aspect of the invention is such that superfinishing such as buffing is performed on the outer peripheral surface of the swirl spiral blade side end plate surface of the swirl spiral part. According to the present embodiment, by performing super-finishing processing such as buffing on the outer peripheral surface of the swirl spiral blade side end plate surface where the sliding resistance is particularly increased, the sliding loss is reduced, abnormal wear is suppressed, and the compressor is reduced. It is possible to achieve both improvement in performance and ensuring reliability.

  According to a fourth aspect of the present invention, in the scroll compressor according to any one of the first to third aspects, the swirl spiral part has a higher surface hardness than the fixed spiral part. According to this embodiment, the surface roughness is improved by superfinishing such as buffing on highly aggressive swirling spiral parts, thereby suppressing increase in input and abnormal wear and improving compressor performance and reliability. Can be secured.

  According to the fifth and sixth inventions, in the scroll compressor according to any one of the first to third inventions, surface finishing and alumite treatment are performed on the swirling spiral component, and then superfinishing such as buffing is performed. According to the present embodiment, by improving the surface roughness of the swirl spiral component that has been hardened or roughened by the surface treatment, it is possible to reduce the sliding loss and improve the performance of the compressor.

  A seventh aspect of the present invention is the scroll compressor according to any one of the fourth to sixth aspects, wherein, for example, high pressure gas such as carbon dioxide is used as the refrigerant. According to the present embodiment, even if the swirl spiral blade is strongly pressed against the fixed spiral blade by the high pressure gas, it is possible to operate while suppressing abnormal wear.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a cross-sectional view of a scroll compressor according to an embodiment of the present invention, and FIGS. 2, 3, and 4 are plan views of swirl spiral components according to the embodiment.

  The refrigerant gas sucked from the suction pipe 1 passes through the suction chamber 3 of the fixed spiral part 2 composed of the fixed blade part 2a and the fixed end plate 2b, and passes between the swirl part 4a and the swirl spiral part 4 composed of the swivel end plate 4b. It is confined in the compression chamber 5 formed by meshing, compressed while decreasing in volume toward the center, and discharged from the discharge port 6. The back pressure chamber 8 formed by being surrounded by the fixed spiral component 2 and the bearing 7 has a back pressure sufficient to prevent the swirl spiral component 4 from being separated from the fixed spiral component 2. The back pressure adjusting mechanism 9 is provided with a valve 11 in a passage 10 that communicates from the back pressure chamber 8 to the suction chamber 3 through the inside of the fixed spiral component 2, and the pressure in the back pressure chamber 8 is set pressure. When the pressure is higher, the valve 11 is opened, and the oil in the back pressure chamber 8 is supplied to the suction chamber 3 to maintain the back pressure chamber at a constant intermediate pressure. The above-described intermediate force is applied to the back surface of the swirl spiral component 4, and the fixed spiral component 2 and the swirl spiral component 4 are separated from each other, thereby preventing leakage at that portion. The oil supplied to the suction chamber 3 moves to the compression chamber 5 along with the swiveling motion, and serves to prevent leakage between the compression chambers.

  At this time, a superfinishing process such as buffing is applied to the swivel end plate 4b of the swirl spiral part 4. When the swirl spiral component 4 is applied with a back pressure not to be separated from the fixed spiral component 2, the swirl spiral component 4 is strongly pressed against the fixed spiral component 2. In particular, when carbon dioxide is used as the refrigerant, the maximum pressing force is about 2.5 times that of the conventional case using chlorofluorocarbon as the refrigerant.

  Therefore, in this embodiment, the swivel mirror plate 4b of the swirl spiral component 4 is subjected to superfinishing processing such as buffing, so that even when carbon dioxide is used as the refrigerant, it is equivalent to the case where conventional flon is used as the refrigerant. Reliability can be ensured, and abnormal operation can be suppressed and operation can be performed without causing seizure. Further, super-finishing processing such as buffing on the swirl spiral blade side end plate 4c of the swirl swirl component 4 which is strongly pressed against the fixed swirl component 2 and the outer peripheral portion 4d of the swirl swirl blade side end plate surface having a large sliding area is the same effect as above. There is.

  Also, by improving the surface roughness by buffing the swirl swirl part 4 with higher surface hardness than the fixed swirl part 2 and improving the surface roughness, the increase in input and abnormal wear can be suppressed to improve compressor performance and reliability. Can be secured.

  Further, the swirl spiral part 4 is formed of an aluminum-based material having a lighter specific gravity than iron, and after various surface treatments and alumite treatments, superfinishing such as buffing is performed. Under the presence of oil in a carbon dioxide refrigerant atmosphere, the seizure load when pressing the iron-based material and the aluminum-based material is about twice or more higher than the seizure load when pressing the iron-based materials together. Therefore, by forming the swirl spiral part 4 with an aluminum-based material having a lighter specific gravity than iron, the centrifugal force of the drive unit during high-speed operation can be reduced, and durability can be reduced and sliding loss can be reduced. Moreover, since the number of parts is not increased, the cost can be kept low without impairing the quietness during operation.

  As described above, the scroll compressor according to the present invention enables appropriate oil supply to the compression chamber and easy control, so that, for example, in the field of refrigerating and air conditioning such as an air conditioner, the refrigerant gas is compressed. This is useful for a scroll compressor of the type.

Sectional drawing of the scroll compressor which shows one Example of this invention Plan view of swirl end plate part of swirl spiral component according to the same embodiment Plan view of swirl end plate part of swirl spiral component according to the same embodiment

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Suction pipe 2 Fixed spiral part 2a Fixed blade part 2b Fixed end plate 3 Suction chamber 4 Swirl spiral part 4a Swivel blade part 4b Swivel end plate 4c Swirl spiral blade side end plate 4d Swirl spiral blade side end plate peripheral part 5 Compression chamber 6 Discharge port 7 Bearing 8 Back pressure chamber 9 Back pressure adjustment mechanism 10 Passage 11 Valve

Claims (7)

A fixed spiral component having a fixed spiral blade and a fixed end plate, a swirl spiral component having a swirl spiral blade and a swing end plate, a plurality of compression chambers formed by meshing the fixed spiral blade and the swirl spiral blade, and In a scroll compressor having a back pressure chamber provided on the side opposite to the swirl spiral blade surface of the swirl swirl part, the swivel end plate of the swirl swirl part is subjected to super finishing such as buffing. Scroll compressor. A fixed spiral component having a fixed spiral blade and a fixed end plate, a swirl spiral component having a swirl spiral blade and a swing end plate, a plurality of compression chambers formed by meshing the fixed spiral blade and the swirl spiral blade, and In a scroll compressor provided with a back pressure chamber provided on the side opposite to the swirl spiral blade surface of the swirl spiral component, super-finishing processing such as buffing is performed on the swirl spiral blade side end plate of the swirl spiral component Scroll compressor characterized by. A fixed spiral component having a fixed spiral blade and a fixed end plate, a swirl spiral component having a swirl spiral blade and a swing end plate, a plurality of compression chambers formed by meshing the fixed spiral blade and the swirl spiral blade, and In a scroll compressor provided with a back pressure chamber provided on the side opposite to the swirl spiral blade surface of the swirl spiral component, superfinishing processing such as buffing is performed on the outer peripheral surface of the swirl spiral blade side end plate surface of the swirl spiral component. A scroll compressor characterized by being applied. The scroll compressor according to any one of claims 1 to 3, wherein the swirl spiral part has a higher surface hardness than the fixed spiral part. The scroll compressor according to any one of claims 1 to 3, wherein a superfinishing process such as buffing is performed after the surface treatment is performed on the swirl spiral part. The scroll compressor according to any one of claims 1 to 3, wherein the swirl spiral part is subjected to alumite treatment as a surface treatment and then subjected to super finishing such as buffing. For example, the scroll compressor according to any one of claims 4 to 6, wherein a high-pressure gas such as carbon dioxide is used as a refrigerant.

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