JPS5857001A - Scroll for scroll hydraulic machine and production method thereof - Google Patents

Abstract

PURPOSE:To reduce machining steps during producing a scroll by constituting the outer periphery and the inner periphery of an end plate of at least one of a stationary scroll and a turning scroll, of different materials, and by employing an anti-abrasion material for the whole or a part of said outer periphery. CONSTITUTION:Upon producing an outer periphery 14 and an inner periphery 15 of an end plate of a stationary scroll 1 by the use of different materials, firstly, said outer periphery 14 of said end plate composed of an anti-abraision material which has been finished with a dimensional accuracy required by machining and the like is placed so as to direct downwardly the surface thereof to be a lapping portion. Then, by adding a pressure to said outer periphery 14 by means of a punch 17 from the upper position, a material 16 for forming said inner periphery 15 of said end plate placed at the lower position is deformed in plasticity and moved into a space of a die 18 to form said inner periphery 15 of said end plate. At this time, the anti-abraision materials of said inner periphery 15 and said outer periphery 14 are formed integrally by a mechanical combination owing to the difference in the coefficient of elastisity or by burying said material 16 into grooves and projections formed the inner periphery of on said anti-abraision material 14.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a scroll fluid machine which uses an end plate part and a wrap part formed by an involute curve or an involute curve provided perpendicularly to the end plate part, and in which the wrap parts are engaged with each other. This invention relates to a scroll and its manufacturing method.

Conventional scroll fluid machines of this type are shown in Figures 1 and 2.
As shown in the figure, a fixed scroll consisting of a mirror plate part 1a and a wrap part 1b formed by involute #M or involute embroidery provided perpendicularly to the mirror plate part 1a, and a mirror plate $28.
The orbiting scroll 2 includes a wrap portion 2b formed by an involute curve or a near curve provided perpendicularly to the mirror plate portion 2a. In the conventional scroll fluid machine as described above, a method is adopted in which a mechanical spring and a part of the discharge pressure are used to generate the full axial pressing force between the fixed scroll and the orbiting scroll. In addition, in order to reduce mechanical loss, the internal pressure of the nozzle for pressing has been lowered, and a method has been adopted in which centrifugal force is used for the necessary pressing force. Normally, these scrolls are manufactured by machining, and it is difficult to completely seal the hermetic space formed by the nine-sided scroll, which may have localized wear due to incorrect machining or assembly of the wrap. As shown in Figure s3, the heads of the wraps lb and 2b of both scrolls are coated with solder, clam or other soft metal, and the head plate sliding surface 11 is coated with a wear-resistant material 12. The above improvements have been made. However, in order to meet these demands, it was necessary to rely on mechanical engineering, consuming a great deal of time and money.

The object of the present invention is to develop a manufacturing method for making a scroll that has a structure that satisfies the functions required of a scroll and is as specific as possible.

The present invention mainly organizes the functions required for the scroll into two types and divides the scroll into two types of separate members. In other words, the outer peripheral part of the end plate is made of wear-resistant material, and the inner peripheral part is formed by plastic deformation. One is made to have the necessary properties, and the other is not made into separate parts as mentioned above, but is made by distributing materials so that wear resistance can be obtained in the necessary parts at the stage of the material for plastic deformation. A plastically deformed molded product can be obtained.

Embodiments of the present invention will be described below with reference to the drawings.

Among the symbols shown in FIGS. 4 to 6, the same symbols as those shown in FIGS. 5g1 to 3 indicate the same parts. Fourth
The figure shows the outer peripheral part 14 and inner peripheral part 15t of the end plate of the fixed scroll.
- shows a configuration diagram of a scroll fluid machine manufactured from separate parts; FIG. 5 shows an embodiment of a method for creating a scroll having such a configuration. Reference numeral 14 is a wear-resistant material for the outer periphery of the end plate, which satisfies the dimensional accuracy required by machining or other methods. Reference numeral 18 indicates a compact die mainly for forming the lap portion, 15 indicates a material for forming the inner peripheral portion of the end plate, and 17 indicates a punch. By applying a charge to the punch 17 in the state shown in FIG. 5, the raw material 15 undergoes plastic deformation and the die 1
8 to form the inner circumferential portion of the end plate. At this time, the end plate is connected to the wear-resistant material on the outer periphery by mechanical coupling due to a difference in elastic modulus, or by using a groove or a protrusion to more firmly connect the inner periphery of the wear-resistant material 14.

In this embodiment, the connection between the inner circumferential portion of the end plate and the outer circumferential portion 14 is strong, and a product with good dimensional accuracy can be easily manufactured.

This is another embodiment shown in FIGS. 6 and 7.

Figure 6 shows a powder metallurgy process in which highly wear-resistant powder is used for the sliding surface on the outer periphery of the end plate of the orbiting scroll, and the other parts are made of powder that is easily plastically deformable and has the required strength. This is a preform of firing material. By plastically deforming this preform as shown in FIG. 7, it is possible to easily manufacture a scroll with a predetermined function and dimensional accuracy of f, without making the scroll a separate member.

According to the present invention, scrolls with essential functions can be manufactured stably with excellent dimensional accuracy, easy storage, and extremely minimal machining, which was a problem with conventional scrolls. can do.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a conventional scroll fluid machine, Fig. 2 is a 11T plane view taken along the -U line in Fig. 1, Fig. 3 is a sectional view of a conventional scroll fluid machine, and Fig. 4 is a sectional view of the conventional scroll fluid machine. A sectional view of the manufactured scroll fluid machine, FIG. 5 is an embodiment of the manufacturing method of the present invention, and FIGS. 6 and 7 are examples of other manufacturing methods of the present invention. 1B, 2m... End plate part, lb, 2b... Wrap part,
10a, 10b... Soft material, 11... Sliding surface, 14
... Wear-resistant material for the outer periphery of the head plate, 15... Inner wall part of the head plate, 1
6...Material for plastic deformation, 17...Punch, 18...
·dice. Agent Patent attorney Toshiyuki Usuda 4,') 1,,,,' 1st item 2nd b ¥73 I21 No. 46

Claims (1)

[Claims] 1. A fixed scroll and an orbiting scroll each consisting of an end plate portion and a wrap portion standing upright on the end plate portion are
In a scroll fluid machine in which the orbiting scroll is rotated while preventing it from rotating on its own axis, the outer circumferential portion and the inner circumferential portion of the end plate of at least one of both scrolls are made of separate members, and both are made of the same material or made of different materials. 1. A scroll fluid machine made of a material made of abrasive material and using a wear-resistant material on the whole or a part of its outer circumference, characterized by the following features. 2. In a scroll fluid machine in which a fixed scroll and an orbiting scroll consisting of an end plate part and a lap part standing upright on the end plate part are engaged with each other with their respective wrap parts facing inward, and the orbiting scroll is rotated while preventing it from rotating,
The outer peripheral part and the inner part of the end plate of at least one of both scrolls are made of separate members, and both are made of the same material or different materials, and the whole or part of the outer peripheral part is made of a wear-resistant material, and the grooves and lap parts of both scrolls are A scroll fluid machine characterized in that a soft material and a self-lubricating material are attached to at least one of the heads of the scroll fluid machine. 3. In a scroll fluid machine in which a fixed scroll and an orbiting scroll consisting of an end plate part and a lap part standing upright on the end plate are engaged with each other with their respective wrap parts facing inward, and the orbiting scroll is rotated while preventing it from rotating, both scrolls are A scroll with the following structure, in which the outer and inner parts of at least one end plate are separate members, and the whole or part of the outer part is made of wear-resistant material, the outer part is made of already processed parts, and the inner part is made of various types. 1. A method for manufacturing a scroll Ω for a scroll fluid machine, which is characterized by forming a material by plastic deformation, casting, or other forming methods, and joining the outer peripheral portion mechanically, metallurgically, or otherwise. 4. A scroll fluid machine in which a fixed scroll and an orbiting scroll consisting of an end plate part and a lap part standing upright on the end plate part are engaged with each other with their respective wrap parts facing inward, and the orbiting scroll is rotated while preventing it from rotating,
In order to impart wear resistance to at least one of the slide chambers of each end plate of both scrolls, a material rich in wear resistance is blended into the area corresponding to this part using a powder metallurgy method, and the other parts are The manufacturing method for a scroll for a scroll fluid machine is characterized in that a preform is made of a material that is easily plastically deformed, and then a scroll with excellent wear resistance is obtained by plastic working the preform.