JPS6342084B2 - - Google Patents

Description

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

As shown in FIGS. 1 and 2, a conventional scroll fluid machine of this type has a fixed scroll consisting of an end plate portion 1a and a wrap portion 1b formed by an involute curve or a near curve provided perpendicularly to the end plate portion 1a. and the end plate portion 2a and this end plate portion 2a.
The orbiting scroll 2 includes a wrap portion 2b formed by an involute curve or an approximation curve provided perpendicular to the scroll. 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 a pressing force in the axial direction between the fixed scroll and the orbiting scroll. In order to reduce mechanical loss, methods have been adopted in which the internal pressure of the housing for pressing is lowered or centrifugal force is used for the necessary pressing force. Normally, these scrolls are manufactured by machining, and local wear may occur due to incorrect machining or assembly of the laps, and it is extremely difficult to completely seal the closed space formed by both scrolls. The above improvement was achieved by attaching solder, lead or other soft metal to the heads of the laps 1b and 2b of both scrolls and attaching a wear-resistant material 12 to the end plate sliding surface 11, as shown in FIG. There is. However, in order to meet these requirements, we have no choice but to rely on machining.
It cost a lot of time and money.

An object of the present invention is to develop a manufacturing method for producing a structure that satisfies the functions required of scrolls at the lowest possible cost and is stable.

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 same properties as the other, 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, to achieve the necessary properties. A plastically deformed molded product with elasticity was obtained.

In other words, the first invention of the present application is that the outer peripheral part and the inner peripheral part of at least one of the scrolls are made of separate members, both of which are made of the same material or different materials, and a wear-resistant material is used for the entire or part of the outer peripheral part. It is characterized by having Further, the second invention is characterized in that, in addition to the structure of the first invention, a soft material or a self-lubricating material is attached to at least one of the grooves of both scrolls and the heads of the lap parts. Furthermore, the third invention of the present application relates to a method for manufacturing a scroll for a scroll fluid machine, in which the outer circumferential portion and the inner circumferential portion of the end plate of at least one of both scrolls are made separate members, and a wear-resistant material is used for the entire or part of the outer circumferential portion. A scroll with a structure that uses already processed parts for the outer periphery, the inner periphery is formed from various materials by plastic deformation, casting, or other forming methods, and is joined to the outer periphery by mechanical, metallurgical, or other means. It is characterized by

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

Figures 1 to 3 of the symbols shown in Figures 4 to 6
The same symbols as those shown in the figures indicate the same parts. FIG. 4 shows a configuration diagram of a scroll fluid machine in which the outer circumferential portion 14 and the inner circumferential portion 15 of the end plate of the fixed scroll are manufactured as separate members. 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. 18 is a die mainly for forming the lap part; 16 is a material for forming the inner peripheral part of the end plate; 1
7 is a punch. By applying a load to the punch 17 in the state shown in FIG. 5, the material 16 undergoes plastic deformation, filling the gap of the die 18 and forming the inner circumference 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 on the sliding surface of the outer periphery of the end plate of the orbiting scroll, and other parts are made of a material that is easily plastically deformable and has the required strength. This is the preform of the binding material. By plastically deforming this preform as shown in FIG. 7, it is possible to easily manufacture a scroll with a predetermined function and high dimensional accuracy without using a separate scroll member.

According to the present invention, scrolls with the necessary functions can be produced with good dimensional accuracy, mass production is easy, and stable, and machining, which has been a problem with conventional scrolls, can be significantly reduced. .

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view of a conventional scroll fluid machine.
Figure 2 is a sectional view taken along the - line in Figure 1;
The figure is a sectional view of a conventional scroll fluid machine, FIG. 4 is a sectional view of a scroll fluid machine manufactured by the present invention, FIG. FIG. 7 is a sectional view of the device during the implementation process of another manufacturing method of the present invention. 1a, 2a...End plate part, 1b, 2b...Lap part, 10a, 10b...Soft material, 11...Sliding surface, 14...End plate outer circumference wear-resistant material, 15...End plate inner circumference part, 16... ...Material for plastic deformation, 17...Punch, 18...Dice.

Claims (1)

[Scope of Claims] 1. A scroll fluid that engages 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, with their respective wrap portions facing inward, and rotates the orbiting scroll while preventing it from rotating on its axis. The machine is characterized in that the outer and inner peripheral parts of at least one of the scrolls are separate members, both are made of the same material or different materials, and the entire or part of the outer peripheral part is made of a wear-resistant material. Scroll fluid machine. 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 rotation, both scrolls are The outer and inner circumferential parts of at least one of the end plates are made of separate members, both are made of the same material or different materials, and the entire or part of the outer circumferential part is made of a wear-resistant material, and the grooves of both scrolls and the heads of the lap parts are used. A scroll fluid machine characterized in that at least one of the above is equipped with a soft material or a self-lubricating material. 3. In a scroll fluid machine in which a fixed scroll and an orbiting scroll consisting of an end plate part and a wrap 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 rotation, both scrolls are A scroll with a structure in which the outer and inner circumferences of at least one end plate are separate members and the entire or part of the outer circumference is made of a wear-resistant material, the outer circumference is made of already processed parts, and the inner circumference is made of various A method for manufacturing a scroll for a scroll fluid machine, characterized by forming a material by plastic deformation, casting, or other forming methods, and joining the outer peripheral part mechanically, metallurgically, or otherwise.