JPS60233389A - Working of scroll body for scroll type hydraulic machine - Google Patents

Abstract

PURPOSE:To permit to work the internal wall surface of the scroll into a predetermined dimension and improve the sealing property upon meshing as well as the performance of the scroll by a method wherein the outer peripheral end of the scroll body is worked under a condition that the outer peripheral end is extended to an extent longer than the same end upon finishing and the extended section is cut off after finishing the working of internal wall surface. CONSTITUTION:The outer peripheral end 80 of the scroll body 282, 302 is extended than the same end 41 upon finishing the working thereof. Under this condition, the internal wall surface 50 is cut sequentially from the internal wall surface 50 of the outer peripheral end 41 toward the center of the scroll by a cutting tool such as a mill cutter or the like, thereafter, the outer wall surface 60 is cut. Then, unnecessary section of the extended section 80 is cut off by an end mill cutter or the like to obtain a predetermined finishing dimension. Thus, the internal wall surface 50 is worked under a condition that the rigidity of the outer peripheral end 41 upon finishing is reinforced, therefore, the tilting of the upper part of outer peripheral end 41 may be reduced and the upper part of internal wall surface 50 of the same peripheral end 41 may be worked into the predetermined finishing dimension. Accordingly, the sealing property upon meshing of the scroll members 28, 30 may be improved and the performance of the hydraulic machine may be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for processing a spiral body of a scroll type fluid machine used as a compressor, motor, expander, etc.

5. An example of a conventional scroll compressor is shown in Figures 2 and 3.
As shown in the figure, the compressor 1 has a housing IOY consisting of a cylindrical portion 11, a front end plate 12 installed at its front end, and a rear end plate 13 installed at its rear end. A main shaft 15 is rotatably supported by a ball bearing 14 installed in the center hole of the front end plate 12. Also, front end Great 12
A shaft seal assembly 17 is assembled inside a sleeve portion 16 that extends forward so as to surround the main shaft 15.
・Ru. A pulley 19 is rotatably supported by a bearing 18 on the outer surface of the sleeve portion 16, and a pulley 19 is rotatably supported by a bearing 18.
An electromagnet 20 is fixed within 19. On the other hand, spindle 1
An armature plate 21 is elastically supported at the end protruding from the sleeve portion 16 of the armature plate 5. Above pulley 1
9. An electromagnetic clutch is constituted by the electromagnet 20 and the armature plate 21, and the rotation of the external drive source is transmitted to the pulley 19 via the bell) Y, and by energizing the electromagnet 20, the armature plate 21 is attracted to the goo IJ 19. The rotational force is transmitted to the main shaft 15 by.

The front end plate 12 is fixed to the front end of the cylindrical portion 11 with, for example, bolts so as to close the opening thereof, and is sealed with an O-ring 22. The rear end plate 13 has a suction chamber 24 and a discharge chamber 25 partitioned by a partition wall 23 therein, and the suction chamber 24 and the discharge chamber 25 communicate with a fluid intake port 26 and a fluid discharge port (not shown), respectively. ing. This rear end plate 13 is attached to the rear end of the cylindrical portion 11 by bolts and nuts 27.

A side plate 281 of the fixed scroll member 28 is held between the rear end plate 13 and the cylindrical portion 11.

Note that 2 and 3 are gaskets to prevent fluid leakage.

The side plate 281 extends between the rear ends of the cylindrical portion 11 and a spiral body 282 erected on one surface of the side plate 281 is disposed in four chambers inside the cylindrical portion 11 . The side plate 281 is the cylindrical part 11
It has a hole 283 connecting the internal chamber unit and the suction chamber 24, and also has a discharge bow 284'Y for discharging the compressed fluid in the fluid pocket in the center to the discharge chamber 25.

The movable scroll member (material) arranged in the chamber 29 consists of a side plate 301 and a spiral body 302 erected on one side of the side plate 301, and the spiral body 302 is 180 degrees with the spiral body 282.
Both spiral bodies 30 are engaged with each other with an angular deviation of
A fluid pocket is formed between 2,282 and 2,282. A spiral groove is formed in the axial end surface of each of the spiral bodies 282, 302, and spiral tip seals 285, 304 are fitted into the grooves. Prevents gas leakage at the axial end face. The movable scroll member 30 is connected to a drive mechanism and a rotation prevention mechanism 37, and the movable scroll member 30 is connected to a drive mechanism and a rotation prevention mechanism 37.
Compression of the fluid is performed by orbiting on a circular orbit with a predetermined radius along with zero rotation.

The fixed and movable scroll members 28 and 30 of the scroll-type fluid machine are manufactured by machining a cast material, and as shown in FIG.
Since the outer peripheral end 41 of 82, 302 has lower rigidity than the center part 42, the upper part 43 of the inner wall surface of the outer peripheral end 41 receives cutting resistance from the cutting tool when machining with a cutting tool such as a mill cutter. Since it is cut while escaping outward, as a result, the upper part 43 of the inner wall surface of the outer circumferential end protrudes inward from the finished dimension. Therefore, the spiral bodies 282 and 30
When the two mesh with each other, there is a problem in that the sealing on the inner wall surface of the outer peripheral end of the spiral body becomes insufficient, and the performance of the fluid machine deteriorates.

The present invention was invented to solve the above problem, and the gist of the present invention is to extend from the outer circumferential end of the spiral body erected on one surface of the side plate of the scroll member. A method for processing a spiral body for a scroll-type fluid machine, characterized in that, after forming the spiral body and processing the inner wall surface of the spiral body, unnecessary portions of the extending portion are cut off.

In the present invention, since the inner wall surface of the spiral body is stretched from the outer peripheral end when finished, the rigidity of the outer peripheral end when the spiral body is finished is strengthened.
When machining the inner wall surface, the upper part will not fall outward. Then, after processing the inner wall surface, unnecessary parts of the stretched portion are cut off, so the inner wall surface at the outer peripheral end of the spiral body can be machined to the specified finished dimensions, thus improving the sealing performance when the spiral bodies are engaged with each other. Therefore, it is possible to prevent deterioration in the performance of fluid machinery.

Hereinafter, the present invention will be specifically explained with reference to FIG. FIG. 1 is a perspective view of the main part of the scroll member before machining, and the outer circumferential end 80 of the spiral body 282, 302 is extended from the outer circumferential end 41 at the time of finishing. In this state, the inner wall surface of the spiral body is sequentially cut from the inner wall surface (material) of the finished outer peripheral end 41 toward the center of the spiral using a cutting tool such as a mill cutter, and then the outer wall surface 6 of the spiral body is cut.
Cut 0 pieces.

Thereafter, unnecessary portions of the extended portion 80 are cut out using a cutting tool such as an end mill cutter to obtain a predetermined finished size.

(Thus, when finishing the outer peripheral end 7 of the spiral body, the inner wall of the spiral body is processed with the outer peripheral end being stretched from the outer peripheral end and the rigidity of the outer peripheral end is strengthened when finished.) The upward tilt is reduced, and the upper part of the inner wall surface of the outer peripheral end can be machined to the specified finished dimensions when finished.Therefore, when the scroll members are engaged, the sealing performance is improved, and the performance deterioration of the fluid machine is prevented. Furthermore, at the end of machining the inner wall surface, unnecessary parts of the extended portion can be cut out by simply passing it through an end mill cutter, so no additional machining time is required.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a main part of a scroll member before machining, showing one embodiment of the present invention. FIGS. 2 and 3 show an example of a conventional scroll-type fluid machine, with FIG. 2 being a longitudinal cross-sectional view and FIG. 3 being a perspective view of essential parts of a scroll member. Scroll member...28, 30, side plate...28t
, 301, Uzumaki body...282 , 302. Outer peripheral end...II. Inner wall surface...Seki, Extension part...80°Representative Patent attorney Shige Okamoto 3 people outside of the literature 4th product No. 3 (Foundation)

Claims (1)

[Claims] The outer peripheral end of the spiral body erected on one surface of the side plate of the scroll member is extended and formed from the outer peripheral end when finished,
A method for processing a spiral body for a scroll-type fluid machine, characterized by cutting off unnecessary portions of the extension portion after processing the inner wall surface of the spiral body.