JP3649885B2 - Scroll compressor assembly method and assembly apparatus, scroll compressor assembly accuracy inspection method and inspection apparatus - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an assembly method and an assembly apparatus for a scroll compressor used in a refrigeration and an air conditioner, and an assembly accuracy inspection method and an inspection apparatus for a scroll compressor.
[0002]
[Prior art]
Conventionally, a scroll compressor 1A used in a refrigeration cycle such as an air conditioner has a configuration shown in FIG. 3, for example. An electric element 2 and a scroll compression element 3 are housed inside a cylindrical sealed container 1 whose both ends are closed. The electric element 2 includes a stator 4 fixed to the inner wall surface of the hermetic container 1 and a rotor 5 rotatably supported on the inner side of the stator 4, and a rotating shaft 6 passes through the rotor 5. Is bound to. The crank portion 7 of the rotary shaft 6 is rotatably supported by a support frame 8 that constitutes a part of the scroll compression element 3. The other end side of the rotating shaft 6 protrudes from the rotor 5, and the tip portion extends downward so as to be immersed in the lubricating oil B accommodated in the sealed container 1.
The rotating shaft 6 is provided with an oil passage 9 that sucks and supplies the lubricating oil B in the axial direction, and the lubricating oil passes through the oil passage 9 to each sliding portion such as the support frame 8. After being supplied, it is recycled.
[0003]
One end portion of the rotating shaft 6 supported so as to penetrate through the support frame 8 is formed as an eccentric portion 10 whose center is eccentric from the axis of the rotating shaft 6. A rocking scroll 11 is connected to the part 10. The orbiting scroll 11 is formed in a disk shape, and a boss hole portion 12 to which the eccentric portion 10 is connected is formed at the center of one side surface. A spiral wrap 13 is integrally formed on the other side surface of the swing scroll 11.
A fixed scroll 14 is fixed to and coupled to the support frame 8 by a plurality of fixing tools 15 such as bolts. A spiral wrap 16 is formed in the fixed scroll 14 at a portion facing the rocking scroll 11, and a plurality of compression chambers 17 are formed between the fixed scroll 14 and the wrap 13. These compression chambers 17 suck in the refrigerant gas at the outer periphery via the suction pipe 18 and gradually move to the center to reduce the volume and compress the refrigerant gas. The oil is discharged into the sealed container 1 from the discharge port 19 provided at the center of the side surface, and the lubricating oil accompanying the space is separated, pulsation is reduced, and the oil is discharged from the discharge pipe 20.
An Oldham joint 21 is interposed between the fixed scroll 14 constituting the scroll compression element 3 and the swing scroll 11, and this Oldham joint 21 swings with respect to the fixed scroll 14 by driving of the electric element 2. The scroll 11 is revolved on a circular orbit without rotating.
[0004]
Conventionally, when the scroll compressor 1A is assembled, a reference hole is provided in advance in the fixed scroll 14 and the support frame 8, the crank portion 7 of the rotary shaft 6 is attached to the support frame 8, and the eccentric portion 10 of the crank portion 7 is attached. Attach the orbiting scroll 11 and then insert a set pin into the reference hole so that the spiral wrap 13 of the orbiting scroll 11 and the spiral wrap 16 of the fixed scroll 14 are engaged with each other. It was. In order to process the reference hole in the fixed scroll 14 and the support frame 8, high positional accuracy is required, so that there is a problem that the processing cost increases and the capital investment increases.
[0005]
[Problems to be solved by the invention]
The object of the present invention is to fix the fixed scroll 14 at an optimal position where the wrap 13 of the orbiting scroll 11 and the wrap 16 of the fixed scroll 14 do not contact each other without processing the reference hole in the fixed scroll 14 and the support frame 8. Since the position can be easily set, it is possible to provide an assembly method and an assembly apparatus for a scroll compressor that can greatly reduce the processing cost and capital investment, and facilitate the assembly accuracy of the assembled scroll compressor. An inspection method and an inspection apparatus capable of being inspected are provided.
[0006]
[Means for Solving the Problems]
That is, in order to solve the above-mentioned problem, the invention of claim 1 includes a fixed scroll, an orbiting scroll that is combined with the fixed scroll and eccentrically swings, a rotating shaft that drives the orbiting scroll, An assembly method for assembling a scroll compressor including a support frame for supporting the crank portion of the rotating shaft and fixing the fixed scroll,
(1) a step of movably provisionally fixing the rotary shaft and the orbiting scroll the fixed scroll and the fixed scroll in combination with the supporting frame to the supporting frame in the fixture,
(2) Next, a step of flowing a pressurized fluid from a discharge port provided in the fixed scroll;
(3) While the orbiting scroll is revolving with the pressure of the pressurized fluid, the fixed scroll and the support frame are adjusted to the proper positions by the revolving, and the fixing device is fastened to fasten the fixing scroll. And a step of fixing the scroll and the support frame.
[0007]
According to a second aspect of the present invention, there is provided a fixed scroll, an orbiting scroll that is combined with the fixed scroll and performs an orbiting motion, a rotating shaft that drives the orbiting scroll, and a crank of the rotating shaft. An assembly device for assembling a scroll compressor comprising a support frame that pivotally supports a portion and fixes the fixed scroll,
(1) means for temporarily fixing the fixed scroll movably to the support frame with a fixture by combining the rotary shaft and the orbiting scroll with the fixed scroll and the support frame;
(2) Next, means for flowing a pressurized fluid from a discharge port provided in the fixed scroll,
(3) While the orbiting scroll is revolving with the pressure of the pressurized fluid, the fixed scroll and the support frame are adjusted to the proper positions by the revolving, and the fixing device is fastened to fasten the fixing scroll. The apparatus includes a scroll and a means for fixing the support frame.
[0008]
According to a third aspect of the present invention, there is provided a fixed scroll, an orbiting scroll that is combined with the fixed scroll and performs an orbiting motion, a rotating shaft that drives the orbiting scroll, and a crank of the rotating shaft. A method of inspecting the assembly accuracy of a scroll compressor provided with a support frame for supporting the fixed scroll and fixing the fixed scroll, which is determined by an allowable sliding resistance from the discharge port of the assembled fixed scroll. The assembly accuracy is verified by flowing the pressurized fluid adjusted to a predetermined pressure and turning the orbiting scroll.
[0009]
According to a fourth aspect of the present invention, there is provided a fixed scroll, an orbiting scroll that is combined with the fixed scroll and performs an orbiting motion, a rotating shaft that drives the orbiting scroll, and a crank of the rotating shaft. An inspection device for inspecting the assembly accuracy of a scroll compressor provided with a support frame for supporting the fixed scroll and fixing the fixed scroll, which is determined by an allowable sliding resistance from the discharge port of the assembled fixed scroll. a predetermined unit for pouring a pressurized fluid which is adjusted to a pressure that is characterized in that a means for testing the quality of when turning the rocking scroll by the pressurized fluid.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings shown in FIGS. FIG. 1 is an explanatory view for explaining an assembly method and assembly apparatus of a scroll compressor of the present invention, an assembly accuracy inspection method and an inspection apparatus of the scroll compressor, and FIG. 2 is a scroll type of the present invention shown in FIG. It is a plane explanatory view of a compressor.
As shown in FIG. 1, the crank portion 7 of the rotary shaft 6 is rotatably attached to the support frame 8 fixed in the body portion 22 of the sealed container 1 by means I (not shown), and is attached to the eccentric portion 10 of the crank portion 7. The rocking scroll 11 is attached, and lubricating oil such as assembly oil is applied to the rocking scroll 11 and the fixed scroll 14 (in the case of an oilless compressor, no lubricating oil is applied). The Oldham coupling 21 is attached so as to restrict the movement of the two scrolls in the rotational direction. Next, the fixed scroll 14 is temporarily fixed to the support frame 8 by a fixing tool 15 such as a fastening bolt.
The eccentric part 10 has a certain amount of eccentricity with respect to the rotary shaft 6 supported by the support frame 8, and the orbiting scroll 11 performs a revolving motion with this amount of eccentricity.
[0011]
In this state, the connection coupler 24 of the means II for allowing the pressurized fluid such as compressed air and nitrogen pressurized to a constant pressure P1 to flow into the discharge port 19 of the fixed scroll 14 is connected. The means II includes a pump 25 for discharging a pressurized fluid, a high pressure regulator 26, a low pressure regulator 27, a switching valve 28, a pipe 40 for connecting them, and the like. Pressurized fluid such as compressed air and nitrogen adjusted to a constant pressure P1 by the high pressure regulator 26 by operating the pump 25 or the like enters the compression chamber 17 from the discharge port 19 via the switching valve 28 and the connection coupler 24.
Reference numeral 29 denotes a fixed base for fixing the body portion 22 to which the electric element 2, the support frame 8, the rotary shaft 6, the swing scroll 11, the fixed scroll 14, the Oldham coupling 21, and the like are mounted.
[0012]
Due to the fluid pressure, the orbiting scroll 11 starts turning in the direction opposite to the turning direction in which the refrigerant gas is compressed during the normal refrigerant compression operation. Even when the fixed scroll 14 temporarily fixed is not assembled at the proper position when temporarily fixed, the spiral wrap 13 of the orbiting scroll 11 is turned into the spiral wrap 16 of the fixed scroll 14 by the turning of the orbiting scroll 11. The fixed scroll 14 settles at an appropriate position where it does not come into contact with the wrap 13 over the entire circumference of the spiral wrap 16. In this state, the fixed scroll 14 can be fixed to the support frame 8 at an optimal position if the fixing tool 15 such as a fastening bolt is evenly tightened by means III (not shown).
[0013]
In the present invention, the swing scroll 11 is assembled to the eccentric portion 10 of the crank portion 7 rotatably supported by the support frame 8 as described above, and the wrap 13 of the swing scroll 11 and the wrap 16 of the fixed scroll 14 are attached. In the engaged state, the fixed scroll 14 is attached to the support frame 8 while turning the orbiting scroll 11, so that the clearances of the side walls of the wraps 13 and 16 of both scrolls are uniform over the entire wrap, The fixed scroll 14 can be fixed to the support frame 8.
[0014]
Thereby, conventionally, the reference holes that are formed in both the fixed scroll 14 and the support frame 8 in order to attach the set pin and the set pin for accurately defining the mounting position of the fixed scroll 14 and the support frame 8 may be eliminated. it can.
Further, in the positioning method using the conventional set pin, assembly is performed unless the position accuracy of the lap 13 of the orbiting scroll 11 and the boss hole 12 on the back surface of the orbiting scroll 11 to which the eccentric portion 10 of the rotating shaft 6 is attached is high. However, in the present invention, the swinging scroll 11 is turned, and the position of the fixed scroll 14 can be set at an optimal position where the side walls of the wraps 13 and 16 do not contact each other. There is no need to do. Thereby, the processing cost of each component is significantly reduced.
[0015]
After the fixed scroll 14 and the support frame 8 are fixed with a predetermined tightening force, the pressure of the pressurized fluid poured from the discharge port 19 is changed to the switching valve 28 and the low-pressure regulator 27 (the pressure of the pressurized fluid is kept constant). The pressure is reduced to a constant pressure P2.
When the fixed scroll 14 is fastened to the support frame 8 at an inappropriate position, the side walls of the scroll wraps 13 and 16 come close to or come into contact with each other and the sliding resistance increases, and the rotation of the swing scroll 11 stops. End up. Further, even when the main bearing 30 and the sub bearing 31 of the support frame 8 are not coaxial, the sliding resistance increases and the rotation of the orbiting scroll 11 stops. The pressure P2 is determined by an allowable sliding resistance, and whether or not the rocking scroll 11 and the crank portion 7 can continue to rotate by the pressure P2 is detected by a sensor that detects sound, a rotational speed, etc. Assembling accuracy can be verified by knowing using a means for verifying.
[0016]
Conventionally, by rotating the rotary shaft 6 and the orbiting scroll 11 and measuring the rotational torque, the crank portion 7 caused by assembly deviation of the fixed scroll 14, the orbiting scroll 11, the support frame 8, the crank portion 7, and the like. In the present invention, the fixed scroll 14 and the support frame 8 are uniformly fixed with a predetermined tightening force and then discharged from the discharge port 19. Since the assembly accuracy can be verified by checking whether or not the orbiting scroll 11 continues to turn when the pressure of the flowed fluid is reduced to a constant pressure P2 (pressure at which a prescribed rotational torque is generated), an expensive torque meter or the like High accuracy testing is possible without using.
[0017]
The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit described in the claims.
[0018]
【The invention's effect】
According to the method and apparatus for assembling the scroll compressor of the present invention, the wrap 13 of the orbiting scroll 11 and the wraps 16 of the fixed scroll 14 can be connected to each other without processing the reference hole in the fixed scroll 14 and the support frame 8. Since the position of the fixed scroll 14 can be easily set at an optimal position where no contact occurs, the processing cost and capital investment can be greatly reduced.
In addition, according to the assembly accuracy inspection method and inspection apparatus for the scroll compressor according to the present invention, high-accuracy testing can be performed without using an expensive torque meter or the like.
[Brief description of the drawings]
FIG. 1 is an explanatory view for explaining an assembly method and an assembly apparatus for a scroll compressor, an assembly accuracy inspection method and an inspection apparatus for a scroll compressor according to the present invention.
2 is an explanatory plan view of a trunk portion in which the fixed scroll shown in FIG. 1 is fixed to a support frame. FIG.
FIG. 3 is an explanatory cross-sectional view illustrating the overall configuration of a conventional scroll compressor.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1A Scroll type compressor 1 Sealed container 2 Electric element 3 Scroll compression element 4 Stator 5 Rotor 6 Rotating shaft 7 Crank part 8 Support frame 10 Eccentric part 11 Rocking scroll 12 Boss hole part 13, 16 Lap 14 Fixed scroll 15 Fixing tool 19 Discharge port 21 Oldham coupling 22 Body 23 Connecting coupler 25 Pump, etc. 26 High pressure regulator 27 Low pressure regulator 28 Switching valve 29 Fixing base 30 Main bearing 31 Sub bearing

Claims (4)

A fixed scroll, an orbiting scroll that is combined with the fixed scroll and eccentrically orbits, a rotating shaft that drives the orbiting scroll, a crank portion of the rotating shaft, and a fixed scroll; An assembly method for assembling a scroll compressor including a support frame to be fixed,
(1) a step of movably provisionally fixing the rotary shaft and the orbiting scroll the fixed scroll and the fixed scroll in combination with the supporting frame to the supporting frame in the fixture,
(2) Next, a step of flowing a pressurized fluid from a discharge port provided in the fixed scroll;
(3) While the orbiting scroll is revolving with the pressure of the pressurized fluid, the fixed scroll and the support frame are adjusted to the proper positions by the revolving, and the fixing device is fastened to fasten the fixing scroll. A method of assembling a scroll compressor, comprising: a step of fixing a scroll and a support frame. A fixed scroll, an orbiting scroll that is combined with the fixed scroll and eccentrically orbits, a rotating shaft that drives the orbiting scroll, a crank portion of the rotating shaft, and a fixed scroll; An assembly device for assembling a scroll compressor comprising a supporting frame to be fixed,
(1) means for temporarily fixing the fixed scroll movably to the support frame with a fixture by combining the rotary shaft and the orbiting scroll with the fixed scroll and the support frame;
(2) Next, means for flowing a pressurized fluid from a discharge port provided in the fixed scroll,
(3) While the orbiting scroll is revolving with the pressure of the pressurized fluid, the fixed scroll and the support frame are adjusted to the proper positions by the revolving, and the fixing device is fastened to fasten the fixing scroll. An assembly apparatus for a scroll compressor, comprising: a scroll and means for fixing the support frame. A fixed scroll, an orbiting scroll that is combined with the fixed scroll and eccentrically orbits, a rotating shaft that drives the orbiting scroll, a crank portion of the rotating shaft, and a fixed scroll; A method of inspecting the assembly accuracy of a scroll compressor having a supporting frame to be fixed, wherein a pressurized fluid adjusted to a predetermined pressure determined by an allowable sliding resistance from a discharge port of the assembled fixed scroll An assembly accuracy inspection method for a scroll compressor, wherein the assembly accuracy is verified by pouring and turning the orbiting scroll. A fixed scroll, an orbiting scroll that is combined with the fixed scroll and eccentrically orbits, a rotating shaft that drives the orbiting scroll, a crank portion of the rotating shaft, and a fixed scroll that supports the fixed scroll; An inspection apparatus for inspecting the assembly accuracy of a scroll type compressor having a supporting frame to be fixed, and a pressurized fluid adjusted to a predetermined pressure determined by an allowable sliding resistance from a discharge port of the assembled fixed scroll An assembly accuracy inspection device for a scroll compressor, comprising: means for injecting a gas; and means for verifying whether the swinging scroll is turned by the pressurized fluid.

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