JPH0633780B2 - Scroll compressor - Google Patents

Description

Description: TECHNICAL FIELD OF THE INVENTION The present invention relates to a scroll compressor, and more particularly, to a scroll compressor obtained by molding a fixed scroll and an orbiting scroll in the scroll compressor with a material mainly composed of synthetic resin. Regarding

[Technical Background of the Invention] A scroll compressor includes a fixed scroll blade provided for a fixed scroll and an orbiting scroll blade provided for an orbiting scroll, and a compression chamber is provided between the fixed scroll blade and the orbiting scroll blade. It is the formed structure. In the scroll compressor, by appropriately orbiting the orbiting scroll with respect to the fixed scroll,
The compression chamber is displaced and contracted from the outer peripheral side to the inner peripheral side of the scroll blade to compress the gas in the compression chamber.

[Problems with the Background Art] Fixed scrolls and orbiting scrolls as blade components in scroll compressors are conventionally manufactured from cast iron. Therefore, even if the fixed scroll and the orbiting scroll have complex scroll wings,
By molding with a mold, a rough shape can be formed, and rough cutting and finishing processing time can be relatively shortened. However, since the scroll blade is required to have an accuracy of a micro unit, surface cutting and finishing are indispensable, a lot of time is required for the processing, and it is difficult to mass-produce.

Therefore, as described in Japanese Patent Laid-Open No. 59-79090, a technique has been proposed in which a fixed scroll and an orbiting scroll are formed by injection molding to omit machining.

However, in the above technique, since the thickness of the root of the teeth constituting the scroll is made thicker than the thickness of the tip of the teeth to improve the mechanical strength, the resin suppresses the distortion during the molding process. In addition, it is difficult to prevent distortion due to gas pressure during operation.

[Object of the Invention] The present invention has been made in view of the above conventional problems, and an object thereof is to provide a scroll compressor capable of shortening the processing of a fixed scroll and an orbiting scroll and enabling mass production. Is.

[Summary of the Invention] In order to achieve the above object, the present invention mainly includes a fixed scroll formed of a material mainly composed of synthetic resin, a swirl vane, an end plate, and a receiving portion that receives eccentric rotation. Wear resistance formed by integrally joining the orbiting scroll formed of the material and the rear surface of the end plate of the orbiting scroll opposite to the surface on which the orbiting blades are formed and the receiving surface of the receiving portion that receives eccentric rotation. And a reinforcing layer made of a conductive material.

EFFECTS OF THE INVENTION According to the present invention, the orbiting scroll 11 of both fixed and orbiting scrolls 5 and 11 in the scroll compressor.
Is made of synthetic resin for the orbiting blade 7, the eccentric fitting portion 9, and the end plate 19, and the back surface 19R of the end plate and the eccentric fitting portion 9 are made of a wear-resistant material integrally joined when forming the orbiting scroll. Since such a reinforcing layer is provided, the processing accuracy by the molding process is further improved, and the number of molding process steps is only one. Moreover, it is possible to easily perform the processing (for example, polishing) for obtaining the planar accuracy of the reinforcing layer.

Also, during operation, both scrolls 5 and 11 due to gas pressure
The mirror layer can be prevented from being curved or distorted by the reinforcing layer.
It is possible to prevent the deterioration of the sealing property between the 7 and 7, and moreover, the orbiting blade 7 and the eccentric fitting portion 9 of the orbiting scroll provided with the reinforcing layer
Since the end plate 19 is molded of synthetic resin,
Since the weight is reduced, the centrifugal force when the orbiting scroll 11 rotates is also reduced, and the load on the eccentric fitting portion 9 by the rotating shaft is also reduced.

[Embodiment of the Invention] As shown in FIGS. 1 to 3, a scroll compressor includes a disc-shaped fixed scroll 5 including a spiral fixed blade (fixed scroll blade) 1 and a suction chamber 3.
And an eccentric part (crank part) equipped with a swirl-type swirl vane (swirl scroll vane) 7 and a rotary shaft (not shown).
The disk-shaped orbiting scroll 11 is provided with a cylindrical eccentric fitting portion 9 into which is fitted, and a casing (not shown) for internally sealing the fixed scroll 5 and the orbiting scroll 11.

The fixed scroll 5 is made of an appropriate synthetic resin, for example, plastic or a plastic composite material or an engineering material in which appropriate materials such as glass fiber, carbon fiber, calcium carbonate, mica, asbestos, and fluororesin powder are appropriately mixed and added. It is molded of plastic or the like and is integrally attached to the casing. The orbiting blade 7, the eccentric fitting portion 9, and the end plate 19 of the orbiting scroll 11 are made of the same material as that of the fixed scroll, and are rotatably supported in the casing. The fixed scroll 5 and the orbiting scroll 11 are combined with each other so that the compression chamber 13 is formed between the scroll blades 1 and 7.

The scroll compressor swirls (or eccentrically moves) the orbiting scroll 11 in the counterclockwise direction in FIG. 1 with respect to the fixed scroll 5 to draw gas from the suction chamber 3 into the compression chamber 13 and to compress the compression chamber. The gas in 13 is gradually compressed while moving from the outer peripheral side to the inner peripheral side, and the high pressure gas is discharged into the casing from the discharge port 15 shown in FIG.

In this type of scroll compressor, the contact portion 17 between the fixed scroll vane 1 and the orbiting scroll vane 7 is not strictly in contact with each other, and a clearance in the unit of micron is maintained. The contact portion 17 is a thin oil film. It is sealed. Therefore, the airtightness is maintained without the adjacent compression chambers 13 communicating with each other.

By the way, the orbiting scroll 11 in the scroll compressor receives a force in a direction away from the fixed scroll 5 due to the pressure in the compression chamber 13. Further, the pressure in the casing is the back surface 19R of the end plate 19 of the orbiting scroll 11.
The orbiting scroll 11 receives a force in a direction approaching the fixed scroll 5 by acting on. Therefore, by changing the pressure acting on the back surface 19R of the end plate 19 in the orbiting scroll 11, the force acting on the orbiting scroll 11 can be exerted in the direction approaching or separating from the fixed scroll.

The side of the aspect in which the orbiting scroll 11 receives the acting force in the direction of separating from the fixed scroll 5 is the second side.
As illustrated in the drawing, a wear-resistant member 25 also serving as a reinforcing layer of an appropriate shape is arranged in the back surface 19R of the end plate 19 and the eccentric fitting portion 9 of the orbiting scroll 11.

More specifically, the material of the wear resistant member is, for example, an appropriate metal, aluminum alloy, oil-impregnated metal, or the like.

The wear-resistant member 25 is set in a forming die in advance when forming the orbiting scroll 11, and integrally joined when forming the orbiting scroll 11.
Therefore, by preliminarily forming a concave portion, a convex portion, or a hole having an appropriate shape on the joint surface of the wear-resistant member 25, the wear-resistant member is joined to the orbiting scroll 11 more reliably and the reliability is improved.

Further, as shown in FIG. 3, the end plate 2 of the fixed scroll 5 is
The wear resistant member 23 can be provided from 1 to the whole. In the case of this structure, the fixed scroll is reinforced by the wear resistant member 23, and the strength is further improved. That is, the wear resistant members 23 and 25 can be provided in the fixed scroll 5 and the orbiting scroll 11 in various modes.

As will be understood from the above description, in the present invention, the orbiting scroll 11 in the scroll compressor uses the orbiting blade 7, the eccentric fitting portion 9 and the end plate 19 as a synthetic resin, and the back surface 19R of the end plate and the eccentric fitting portion. The inner peripheral surface of 9 is provided with a reinforcing layer made of a wear resistant material that is integrally joined when forming the orbiting scroll.

Therefore, in the present invention, the reinforcing layer suppresses the distortion of the end plate surface due to the molding pressure at the time of molding the scrolls 5 and 11, and the distortion due to the contraction at the time of cooling. That is, since the reinforcing layer suppresses the distortion during the molding process using each scroll synthetic resin, the processing accuracy of the molding process is further improved, and the molding process is completed once. Moreover, it is possible to easily perform the processing (for example, polishing) for obtaining the planar accuracy of the reinforcing layer.

Also, during operation, both scrolls 5 and 11 due to gas pressure
The mirror layer can be prevented from being curved or distorted by the reinforcing layer.
It is also possible to prevent the deterioration of the sealing property between the seven. Moreover, the orbiting blades 7 of the orbiting scroll provided with the reinforcing layer,
Since the eccentric fitting portion 9 and the end plate 19 are formed of synthetic resin, the weight is reduced and the centrifugal force when the orbiting scroll 11 rotates is also reduced accordingly, and the load of the eccentric fitting portion 9 by the rotating shaft is also reduced. Get smaller.

Furthermore, since the reinforcing layer is made of a wear resistant member, the sliding contact portion is naturally excellent in wear resistance.

[Brief description of drawings]

FIG. 1 is a cross-sectional top view showing a state in which a fixed scroll and an orbiting scroll according to an embodiment of the present invention are combined,
FIG. 3 is a side sectional view of an orbiting scroll showing an embodiment of the present invention, and FIG. 3 is a side sectional view of a fixed scroll showing an embodiment of the present invention. 5: Fixed scroll, 11: Orbiting scroll, 2
3,25 ... Abrasion resistant member

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Makoto Hayano Makoto Hayano, 8 Shinsugita-cho, Isogo-ku, Yokohama, Kanagawa Electric Machinery Research Laboratory (72) Mitsuo Hatori, 8 Sue-sugita-machi, Isogo-ku, Yokohama, Kanagawa In-house (72) Inventor Kimiaki Kanaki, 8 Shinsugita-cho, Isogo-ku, Yokohama, Kanagawa Prefecture, Institute of Electrical Appliances Technology (72) Inventor, Hitoshi Hattori, 8-Sugita-cho, Isogo-ku, Yokohama, Yokohama, Kanagawa (72) Invention Person Masashi Shimura 8 Shinsugita-cho, Isogo-ku, Yokohama-shi, Kanagawa, Institute of Electrical Engineering, Japan (56) References JP 59-79090 (JP, A) JP 58-57001 (JP, A) JP 59- 79089 (JP, A)

Claims (1)

[Claims] 1. A fixed scroll made of a material mainly made of synthetic resin, a turning scroll in which a swirl vane, an end plate and a receiving portion for receiving eccentric rotation are made of a material mainly made of synthetic resin. The end plate is provided with a back surface portion opposite to the surface on which the swirl blade is formed and a reinforcing layer made of a wear-resistant material integrally formed on the receiving surface of the receiving portion that receives eccentric rotation. And scroll compressor.