JP2008202525A - Scroll compressor and method of manufacturing same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a scroll compressor in which anodizing treatment suppressed with burning is realized. <P>SOLUTION: In this scroll compressor, a fixed scroll member 12 and a rotary scroll member 13 having end plates 12a, 13a vertically installed on swirl laps 12b, 13b are engaged with each other, and one scroll is so supported on the other scroll as to be revolved. A round shape 32 as a chamfered part is formed at each of the swirl outer end lap end corner parts 30 of the laps 12b, 13b. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a scroll compressor provided in an air conditioner, a refrigeration apparatus, or the like.

  In the scroll compressor, the fixed scroll member and the orbiting scroll member (a pair of scroll members) are arranged in combination with each other's spiral wall bodies, and the orbiting scroll member revolves and revolves relative to the fixed scroll member. Thus, the volume of the compression chamber formed between the walls is gradually reduced, and the fluid in the compression chamber is compressed.

  As shown in FIGS. 4A and 4B, the pair of scroll members has a fixed scroll member 1 in which a spiral wrap 1b is installed on an end plate 1a, and a wrap 2b on an end plate 2a. A combination with the orbiting scroll member 2 is used. Then, the two wraps 1b, 2b are engaged with each other by shifting the angle by 180 degrees, and the orbiting scroll member 2 is revolved, whereby a sealed space formed between the wraps 1b, 2b is formed from the outside to the inside. The fluid is compressed by reducing the volume while moving. In addition, the code | symbol 3 of Fig.4 (a) has shown the discharge port for discharging this compressed fluid.

In order to obtain the required strength for the fixed scroll member 1 and the orbiting scroll member 2, surface treatment such as adoption of an alloy or anodic oxide coating (alumite treatment) is performed (for example, see Patent Documents 1 to 5). In carrying out the alumite treatment, the scroll is cut into the above shape and then attached to a jig installed on a hanger and electrolyzed in a sulfuric acid solution to form a coating.
Japanese Patent Laid-Open No. 4-5491 JP-A-4-347301 Japanese Patent Laid-Open No. 5-32083 JP-A-9-72288 JP 2001-304149 A

  In this anodizing process, in the conventional scroll member, the current is locally concentrated with respect to the corner, and as a result, the film becomes brittle, and in some cases, a burning phenomenon in which the base material is eluted may occur. .

  Burning tends to occur easily at the end of the scroll wrap end corner 5 shown in FIG. 4 and the edge 6 of the tooth tip facing the other scroll end plate shown in FIG.

  This invention is made | formed in view of the said situation, and it aims at providing the manufacturing method of the scroll compressor which implement | achieves the alumite process which suppressed burning, and a scroll compressor.

Therefore, in the present invention, the following means are adopted in order to solve the above problems.
The scroll compressor according to claim 1, wherein scrolls each having an end plate with spiral wraps are engaged with each other, and one scroll is supported so as to be capable of revolving with respect to the other scroll. In the scroll compressor thus formed, a chamfered portion is provided at a corner portion of the spiral outer end of the wrap.

  Further, the invention according to claim 2 is such that scrolls each having an end plate with spiral wraps are engaged with each other, and one scroll is supported so as to be capable of revolving with respect to the other scroll. In the scroll compressor as described above, a chamfered portion is provided at the edge of the tooth tip where the wrap faces the scroll end plate on the other side.

Thereby, local concentration of current during anodizing treatment is difficult to occur and burn-in can be prevented.
The chamfered portion may be a flat surface with chamfered corners, or may be processed with smooth corners such as R machining. Chamfering may be performed by cutting from a cornered shape, or a shape having a chamfered portion may be formed from the beginning.

  According to a third aspect of the present invention, scrolls each having an end plate with a spiral wrap are engaged with each other, and one scroll is supported so as to be capable of revolving orbiting with respect to the other scroll. In the scroll compressor manufacturing method, an alumite treatment is performed on the wrap after chamfering a corner of the spiral outer end of the wrap or an edge of a tooth tip where the wrap faces the scroll end plate on the other side. It is characterized by performing.

  As a result, local concentration of current during anodizing treatment is difficult to occur, and the occurrence rate of the burning phenomenon can be reduced.

  According to the scroll compressor of the present invention and the manufacturing method thereof, local concentration of current during scroll anodizing treatment is difficult to occur, and seizure can be prevented.

An embodiment of the scroll compressor according to the present invention will be described below with reference to the drawings, but the present invention is not limited to this.
FIG. 1 is a cross-sectional view showing the overall configuration of the scroll compressor according to the present embodiment. 2A and 2B are diagrams showing components used in the scroll compressor, wherein FIG. 2A is a perspective view of a fixed scroll member, and FIG. 2B is a perspective view of an orbiting scroll member. Moreover, FIG. 3 is a figure which shows the principal part of the scroll member.

In FIG. 1, reference numeral 11 denotes a housing. The housing 11 includes a housing body 11a formed in a cup shape and a lid plate 11b fixed to the opening end side of the housing body 11a. .
Inside the housing 11, a scroll type compression mechanism including a fixed scroll member 12 and a turning scroll member 13 is disposed.
As shown in FIG. 2A, the fixed scroll member 12 has a configuration in which a wrap 12b is erected on one side surface of the end plate 12a. As shown in FIG. 2B, the orbiting scroll member 13 has a configuration in which a wrap 13b is erected on one side surface of the end plate 13a. The wrap 13b is substantially the same as the wrap 12b on the fixed scroll member 12 side. Have the same shape. Further, as shown in FIG. 1, tip seals 27 and 28 for improving the airtightness of the compression chamber C are disposed on the upper edges of the wraps 12b and 13b.

  As shown in FIG. 1, the fixed scroll member 12 is fastened to the housing main body 11 a by bolts 14. Further, the orbiting scroll member 13 is assembled with the wraps 12b and 13b engaged with each other in a state where they are eccentric with respect to the fixed scroll member 12 by the revolution orbit radius and shifted in phase by 180 °. The rotation prevention mechanism 15 provided between 11b and the end plate 13a is supported so as to be capable of revolving while being prevented from rotating.

A rotating shaft 16 having a crank 16a passes through the lid plate 11b, and is rotatably supported by the lid plate 11b via bearings 17a and 17b.
A boss 18 projects from the center of the other end surface of the end plate 13a on the orbiting scroll member 13 side. An eccentric portion 16b of a crank 16a is rotatably accommodated in the boss 18 via a bearing 19 and a drive bush 20, and the orbiting scroll member 13 revolves by rotating the rotating shaft 16. Yes. Further, a balance weight 21 for canceling the unbalance amount given to the orbiting scroll member 13 is attached to the rotary shaft 16.

Further, a suction chamber 22 is formed around the fixed scroll member 12 inside the housing 11, and a discharge cavity 23 partitioned by the bottom surface in the housing body 11a and the other side surface of the end plate 12a is formed. .
The housing body 11a is provided with a suction port 24 that guides a low-pressure fluid toward the suction chamber 22, and the center of the end plate 12a on the fixed scroll member 12 side has moved to the center while gradually reducing the volume. A discharge port 25 that guides a high-pressure fluid from the compression chamber C toward the discharge cavity 23 is provided. Further, the other side surface (back surface) of the end plate 12a is provided with a discharge valve 26 that opens the discharge port 25 only when a pressure of a predetermined level or more is applied.

  The overall operation of the scroll compressor according to this embodiment having the above-described configuration will be described. The rotary shaft 16 is driven to rotate about its axis by a motor (not shown). Then, the eccentric shaft 16b causes the orbiting scroll member 13 to make a revolving orbiting motion while being prevented from rotating with respect to the fixed scroll member 12. Then, the low-pressure fluid taken in from the suction port 24 moves while gradually increasing its pressure by gradually decreasing the volume, and is finally discharged to the discharge cavity 23 through the discharge port 25.

In the scroll type compressor of this embodiment, it is set as the following manufacturing methods.
When cutting the lap, as shown in FIG. 2, the lap end corner 30 is formed into an R shape (chamfered portion) 32. FIG. 3 is a cross section orthogonal to the wrap winding direction. As shown in the figure, the tip edge portion 31 of the wrap is formed into an R shape (chamfered portion) 33.
In addition, although exaggerated in the drawing, the actual size of the R shapes 32 and 33 is very small, so there is no influence on the compression performance.

  As described above, in the scroll compressor of the present embodiment, the R shape 33 as the chamfered portion is provided at the wrap end corner 30 at the spiral outer end of the wraps 12b and 13b, and the wraps 12b and 13b Since the R shape 33 is provided as a chamfered portion at the tooth tip edge portion 31 facing the scroll end plates 12a and 13a on the side, current is supplied to the wrap end corner portion 30 and the tooth tip edge portion 31 in the anodizing process. As a result, burn-in (burning phenomenon) can be prevented.

  In the above example, the lap end corner portion 30 and the tooth tip edge portion 31 are processed with R. However, any shape such as a chamfered shape with a flat surface can be used as long as the processing is performed with no corners such as chamfering. Of course there may be. In the case of a chamfered shape, since it is integrally formed at the time of cutting the lap, the processing is easy.

It is a figure which shows one Embodiment of the scroll compressor of this invention, Comprising: It is sectional drawing which shows the whole structure. It is a figure which shows the components used for the scroll compressor, Comprising: (a) is a perspective view of a fixed scroll member, (b) is a perspective view of a turning scroll member. It is a figure which shows the principal part of a fixed scroll member and a turning scroll member, Comprising: It is sectional drawing orthogonal to a wrap winding direction. It is a figure which shows the components used for the conventional scroll compressor, Comprising: (a) is a perspective view of a fixed scroll member, (b) is a perspective view of a turning scroll member. It is sectional drawing orthogonal to the lapping direction which showed the tooth | gear tip of the scroll member.

Explanation of symbols

DESCRIPTION OF SYMBOLS 12 ... Fixed scroll member, 12a ... End plate, 12b ... Wrap, 13 ... Revolving scroll member, 13a ... End plate, 13b ... Wrap, 30 ... Wrap end corner, 31 ... Tooth edge part, 32 ... R shape (Chamfering) Part), 33 ... R shape (chamfered part)

Claims (3)

In a scroll compressor in which scrolls in which spiral wraps are erected on an end plate are engaged with each other, and one scroll is supported so as to be capable of revolving with respect to the other scroll,
A scroll type compressor, wherein a chamfered portion is provided at a corner of the spiral outer end of the wrap. In a scroll compressor in which scrolls in which spiral wraps are erected on an end plate are meshed with each other, and one scroll is supported so as to be capable of revolving with respect to the other scroll,
A scroll compressor, wherein a chamfer is provided at an edge of a tooth tip where the wrap faces the scroll end plate on the other side. In a scroll compressor manufacturing method in which scrolls in which spiral wraps are erected on end plates are engaged with each other, and one scroll is supported so as to be capable of revolving with respect to the other scroll,
Manufacture of a scroll type compressor in which an anodizing process is performed on the wrap after chamfering a corner of the spiral outer end of the wrap or an edge of a tooth tip where the wrap faces the scroll end plate on the other side. Method.

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