JP2593536B2 - Scroll fluid machine - Google Patents

Abstract

PURPOSE:To reduce wear due to slide between a revolving scroll and a thrust support by a method wherein a reinforcing ring is disposed between the revolving scroll and the thrust support, a plurality of communicating holes and an oil groove are formed in the reinforcing ring. CONSTITUTION:After fluid is sucked through a suction pipe 1a extending through a casing 1 and compressed in association of fixed and revolving scrolls 2 and 4 with each other, it is discharged through a delivery pipe 1b. In this case, a reinforcing ring 5 having wear resistance is disposed between the back of an end plate 4a of the revolving scroll 4 and a thrust support 6 to support a thrust forcibly produced along with revolution of the revolving scroll. A plurality of communicating holes 5b extending through each of the contact surfaces of the revolving scroll 4 and the thrust support 6 are formed in the reinforcing ring 5. An oil groove 5d for intercommunicating each communicating hole 5b and a crank shaft 3b is formed in the surface, making contact with the end plate 4a, of the reinforcing ring 5.

Description

DETAILED DESCRIPTION OF THE INVENTION [Purpose of the Invention] (Industrial application field) The present invention relates to improving the performance and reliability of a scroll fluid machine.

(Prior Art) Conventionally, in a scroll fluid machine in which a orbiting scroll is turned with respect to a fixed scroll and a fluid is compressed by a compression chamber composed of respective wraps, the orbiting scroll is made of an aluminum alloy or a synthetic resin, The thrust force accompanying the turning of the orbiting scroll is received by a sliding surface of a thrust receiver provided in contact with the back surface of the orbiting scroll, and lubricating oil is cranked by a pump provided in a shaft to reduce friction caused by turning of the orbiting scroll. The lubricating oil is pumped into the chamber, and the lubricating oil is agitated by a balancer provided opposite the crank, lifted up to the thrust receiver, and penetrated into the oil groove provided on the sliding surface of the thrust receiver to achieve a smooth turning motion. I was planning.

(Problems to be Solved by the Invention) However, when the orbiting scroll made of an aluminum alloy or a synthetic resin is slid directly into contact with the thrust receiver, the wear is large, and as a lubrication method for reducing this wear, a conventional crankcase is used. In the method of scraping the lubricating oil into the thrust receiver with a balancer, sufficient lubrication could not be performed, and there was a problem in terms of performance such as the life of the machine and reliability.

The present invention has been made in order to solve such a problem, and an object of the present invention is to provide a scroll fluid machine in which the performance and reliability are improved by reducing wear of an orbiting scroll.

The present invention relates to a scroll fluid machine in which a thrust receiver is arranged on the back surface of a head of a revolving scroll that revolves around a crankshaft provided with a passage for lubricating oil as a revolving axis. A ring is formed between the back surface of the orbiting scroll and the thrust receiver, and a reinforcing ring made of a wear-resistant material equal to or more than the material of the end plate is provided, and the reinforcing ring faces the thrust receiver of the reinforcing ring. A plurality of communication holes communicating the rear side of the orbiting scroll and the thrust receiving side are provided in the ring surface area, and these communication holes communicate with the passage in the crankshaft on a surface contacting the rear side of the orbiting scroll. A scroll fluid machine provided with an oil passage for lubricating oil.

Further, the reinforcing ring is formed integrally with the crankshaft bearing, and is press-fitted and fixed to the back surface of the orbiting scroll.

Further, the reinforcing ring is press-fitted and fixed to an outer periphery of a bearing of a crankshaft of the orbiting scroll, and the bearing is provided with an oil hole communicating between an inner wall of the bearing and an oil groove of the reinforcing ring.

(Operation) By adopting such a configuration, a portion that directly slides on the thrust receiver is a reinforcing ring made of a material having a wear resistance equal to or more than that of the orbiting scroll, so that wear can be reduced. By providing the reinforcing ring with a communication hole and an oil groove communicating with the inside of the crankshaft, the lubricating oil pumped to the upper part inside the crankshaft by the pump can be directly guided to the sliding surface of the reinforcing ring and the thrust receiver. , Sufficient lubrication becomes possible.

Further, since the orbiting scroll and the reinforcing ring are independent members, machining is easy.

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view of this embodiment, in which fluid sucked from a blowing pipe 1a penetrating a casing 1 is turned by a wrap of a fixed scroll 2 and a crankshaft 3b connected to a shaft 3a of a motor 3. The orbiting scroll 4 is wrapped in a compression chamber and is discharged from the discharge pipe 1b.

5 and 2 is a reinforcing ring made of an iron-based metal or a carbon-based resin. The reinforcing ring 5 is an orbiting scroll 4 made of an aluminum alloy or a synthetic resin.
And a thrust receiver 6 for receiving a thrust force associated with the orbiting movement of the orbiting scroll 4, and the reinforcing ring 5 is provided on the crankshaft 3b as shown in FIGS. And a plurality of communication holes 5b communicating the surface of the orbiting scroll 4 in contact with the end plate 4a and the surface of the orbiting scroll 4 in contact with the thrust receiver 6, and a surface in contact with the end plate 4a. An oil groove 5d is provided between the communication hole 5b and the inner peripheral wall 5c of the ring, and is press-fitted and fixed to the concave portion 4b of the end plate 4a of the orbiting scroll 4, and a bearing for the crankshaft 3b of the orbiting scroll 4 is provided. It also serves as a sliding part with the thrust receiver 6.

In the scroll fluid machine configured as described above, the orbiting scroll 4 orbits by the crankshaft 3b connected to the shaft 3a of the motor 3 at the time of the compression operation. At this time, the centrifugal pump 3c provided in the shaft 3a rotates the case. The lubricating oil stored in the bottom part 1c is pumped up to the upper part of the crankshaft 3b, and part of the lubricating oil is
Through the communication hole 5b, to the thrust receiver 6, further lubricating the sliding surface between the reinforcing ring 5 and the thrust receiver 6 while passing through the oil groove 6a provided in the thrust receiver 6, The oil enters the gap between the fixed scroll 2 and the orbiting scroll 4 from the back space and lubricates between them, and the lubricated oil passes through the case upper part 1d to the case bottom part 1c through the through hole 1f provided in the frame 1e. Return.

Lubrication for the crankshaft 3b is performed by pumping up to the upper part of the crankshaft 3b and part of the lubricating oil flows through an oil groove 3d provided on the outer periphery of the crankshaft 3b, and lubrication for the main shaft 3e is applied to the shaft 3a. This is performed by lubricating oil which has been drawn up to the lower end of the main bearing portion by another provided centrifugal pump 3f flows through an oil groove 3g provided on the outer periphery of the shaft 3a.

FIG. 3 is a sectional view of the orbiting scroll 4 and the reinforcing ring 5 for explaining another embodiment. In this embodiment, the bearing 4c of the orbiting scroll 4 with respect to the crankshaft 3b is a head plate.
The bearing 4c is provided with an oil hole 4d corresponding to the oil groove 5d of the reinforcing ring 5. The oil hole 4d
In this embodiment, the reinforcing ring 5 is press-fitted to the outer periphery of the bearing 4c and fixed to the rear surface of the end plate 4a so that the position of the oil groove 5d of the reinforcing ring 5 and the inner wall of the bearing 4c communicate with the oil groove 5d. is there.

In the above embodiment, the aluminum scroll or the synthetic resin is used as the material of the end plate of the orbiting scroll, and the ferrous metal or the carbon resin is used as the material of the reinforcing ring. It is preferable that the wear resistance is equal to or higher than the material of the end plate of the orbiting scroll.

The present invention is not limited to the above-described embodiment, and can be variously modified and implemented without departing from the scope of the invention.

[Effect of the Invention] As described above, according to the present invention, by providing the reinforcing ring, it is possible to reduce abrasion due to sliding with the thrust receiver, and to enable sufficient lubrication of lubricating oil to reduce sliding loss. In addition, the independent configuration of the orbiting scroll and the reinforcing ring facilitates machining, and provides a scroll fluid machine which is excellent not only in performance and reliability but also in manufacturing.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of an embodiment according to the present invention, FIG. 2 is a perspective view of a reinforcing ring and an orbiting scroll of the embodiment, and FIG. 3 is a cross-sectional view of an orbiting scroll and a reinforcing ring of another embodiment. . DESCRIPTION OF SYMBOLS 1 ... Casing, 1a ... Blowing pipe 1b ... Discharge pipe, 1c ... Case bottom 1d ... Case upper, 1e ... Frame 1f ... Through-hole, 2 ... Fixed scroll 3 ... Motor, 3a ... … Shaft 3b …… Crank shaft, 3c …… Centrifugal pump 3d, 3g …… Oil groove, 3e …… Main shaft part 3f …… Centrifugal pump 4 …… Swirl scroll, 4a …… End plate 4b …… Recess, 4c …… Bearing 5 Reinforcing ring, 5a Bearing 5b Communication hole, 5c Inner wall 5d Oil groove 6 Thrust receiver, 6a Oil groove

Claims (1)

(57) [Claims] 1. A scroll fluid machine in which a thrust receiver is arranged on the back of a head plate of an orbiting scroll that orbits around a crankshaft provided with a passageway for lubricating oil, between the back of the orbiting scroll and the thrust receiver. A reinforcing ring of a wear-resistant material having a ring shape and equal to or more than the material of the end plate is provided. The reinforcing ring has a rear surface side of the orbiting scroll and a thrust support in a ring surface area facing the thrust support of the reinforcing ring. A plurality of communication holes communicating with the side of the orbiting scroll are provided, and an oil passage for lubricating oil is provided on a surface in contact with the rear side of the orbiting scroll, and the communication hole communicates with the passage in the crankshaft. Scroll fluid machine