JP2811715B2 - Scroll compressor centering method and apparatus - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a centering method and an apparatus for assembling a fixed scroll and an orbiting scroll of a scroll compressor by assembling them.

2. Description of the Related Art Conventionally, as a method of assembling a scroll compressor, as shown in Japanese Patent Application Laid-Open No. 57-193793, there is a method in which positioning holes are provided in an orbiting scroll and a fixed scroll, and pins are inserted into these holes to perform positioning. .

However, in this method, it is necessary to perform scroll processing on the basis of a positioning hole, and the processing accuracy affects performance, resulting in an increase in processing cost and a problem that optimum positioning cannot be performed due to a processing error. was there. Further, there has been a problem that the position accuracy and the clearance after the fixed scroll and the orbiting scroll have been engaged cannot be measured, and the accuracy guarantee is ambiguous.

Therefore, the present invention, in order to solve this problem, after engaging the fixed scroll and the orbiting scroll, accurately measure the clearance of both scrolls, centering method of a scroll compressor that can be centered and assembled, and its method It is to provide a device.

It is another object of the present invention to provide a method for centering, determining a position in a rotational direction, and obtaining an optimum clearance position.

Means for Solving the Problems The centering method of the scroll compressor of the present invention is as follows.
When the fixed scroll and the orbiting scroll are engaged, and the fixed scroll and the orbiting scroll are in contact with each other, the bearing of the orbiting scroll is fixed, and the orbiting scroll is sequentially rotated from 0 °, 90 °, 180 °, and 270 °. Rotate and move the fixed scroll toward the center of rotation until the fixed scroll contacts the orbiting scroll at each rotation position of the orbiting scroll, and obtain the X and Y coordinates when both the fixed and orbiting scrolls come into contact. The center of the coordinates is determined from the X and Y coordinates detected at the rotation position, and is used as the positioning center of the fixed scroll and the orbiting scroll.

The centering device of the scroll compressor according to the second invention of the present invention includes a θ table having fixing means for fixing the fixed scroll at the center of the table, an XY table on which the θ table is mounted, and a bearing for the orbiting scroll. A fixing device that can be fixed so as not to move, a shaft rotating mechanism that rotates the rotating shaft of the orbiting scroll, a plurality of pressing devices that are arranged around the XY table and press the fixed scroll toward the center of rotation of the orbiting scroll,
X coordinate detector for detecting XY coordinates arranged in XY direction and Y
A coordinate detector, an X-direction positioning device and a Y-direction positioning device capable of positioning the XY table arranged in the XY direction of the XY table, and operating each mechanism, based on the coordinate data from the X coordinate detector and the Y coordinate detector. And a control device for controlling the movement of the XY table at the positioning center of the fixed scroll and the orbiting scroll.

Further, according to a third aspect of the present invention, the fixed scroll is fed at least twice in the rotation direction by the θ table, and the fixed scroll is moved toward the center of rotation so as to come into contact with the orbiting scroll at every pitch, and the movement is performed. The amount and the amount of movement change linearly and symmetrically around the maximum clearance position, thereby obtaining the optimum clearance position and adjusting the position with high accuracy.

According to the first aspect of the present invention, centering can be performed in a completed state in which the fixed scroll, the orbiting scroll, and other components are incorporated. Therefore, not only the centering in the relationship between the fixed scroll and the orbiting scroll, but also a high-precision centering including the accuracy of all the components and being unaffected by machining errors can be performed.

According to the scroll compressor centering device of the second invention of the present invention and the compressor centering method of the third invention, the adjustment of the optimum clearance and the positioning in the rotational direction can be performed.

Embodiments Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic front view of a centering device for suitably implementing one embodiment of a scroll compressor centering method of the present invention, and FIG. 2 is a schematic side view of the same.

1 and 2, reference numeral 1 denotes a Y table, 2 denotes an X table mounted on a Y table 1, and 3 denotes a first fixed member for fixing a fixed scroll 4 of a scroll compressor mounted on the X table. Claw 5, 5 is a second fixed claw paired with the first fixed claw 3, 6 is a third fixed claw mounted on a support block 8 for fixing a bearing 7 of the orbiting scroll, and 9 is a third fixed claw.
The fourth fixed claw paired with the fixed claw 6 is a shaft rotating device for descending and grasping the rotating shaft 11 of the orbiting scroll, and the second is for pressing the XY table from the minus side in the X direction.
13 is a second pressing device that presses the XY table from the + side in the X direction, 14 is a third pressing device that presses the XY table from the − side in the Y direction, and 15 is the + pressing device in the XY table in the Y direction. A fourth pressing device for pushing the XY table, 16 is an X-direction driving device for moving the XY table to position the XY table, 17 is an X-direction detector for measuring the amount of table movement in the X direction and detecting coordinates, and 18 is an XY detector. Y-direction drive device for moving the XY table to position the table in the Y direction, 19
Reference numeral 20 denotes a Y-direction detector for measuring the amount of movement in the Y-direction and detecting the coordinates. Reference numeral 20 denotes an X-direction pressing rod for fixing the XY table, which is fixed between the rod and the X-direction driving device 16. Reference numeral 21 denotes a Y-direction pressing rod, which fixes the XY table between the Y-direction driving device 18 and the Y-direction pressing device. Reference numeral 22 denotes a control device that calculates a clearance and a positioning position from the detected coordinates and operates each actuator.

A centering method by the centering device of the scroll compressor having the above configuration will be described with reference to FIGS.

FIG. 3 is a sectional view of a scroll compressor,
23 is an orbiting scroll, 24 is an Oldham ring for preventing the orbiting scroll from rotating, 25 is a bolt for fixing the bearing 7 and the fixed scroll 4, E is a clearance formed inside the orbiting scroll 23 and outside the fixed scroll 4, and F is The clearance formed between the outer side of the orbiting scroll 23 and the inner side of the fixed scroll 4 means that the fixed scroll 4 is positioned based on the orbiting scroll 23 so that the clearance E and the clearance F are equal in both the X and Y directions. Things.

Fig. 4 shows the rotary shaft of the scroll compressor.
The positional relationship between the fixed scroll 4 and the orbiting scroll at 0 °, 90 °, 180 ° and 270 ° when 11 is rotated is shown.

In order to center the scroll compressor, first, the scroll compressor is placed on the X table 2 with the bolts 25 loosened, and the fixed scroll 4 is fixed with the first fixed claw 3 and the second fixed claw 5. The third fixed claw 6
And the fourth fixing claw 9 to fix the bearing 7, and the shaft rotating device
10 is lowered and the rotating shaft 11 is grasped. Next, the rotary shaft 11 is rotated so that the positional relationship between the orbiting scroll 23 and the fixed scroll 4 is adjusted to 0 °, and the first pressing device 12 is rotated.
As a result, the X table 2 is pushed to the + side, and the fixed scroll 4 hits the orbiting scroll 23. When the first pressing device 12 is returned to its original state, the pressing pressure becomes zero and the fixed scroll 4 and the orbiting scroll 23 come into contact with each other. Stored in the control unit 22 the X-coordinate of that state as an X coordinate X ₁ is detected by the X-direction detector. Next, the rotary shaft 11 is rotated by 90 °, and the positional relationship between the fixed scroll 4 and the orbiting scroll 23 is shown by 90 in FIG.
In accordance with the state of ゜, the Y-table 1 is pushed to the + side by the third pressing device 14, and the fixed scroll 4 is turned to the orbiting scroll 23.
, The third pressing device 14 is returned to its original state, the Y coordinate of the Y table 1 in a state where the fixed scroll 4 and the orbiting scroll 23 are in contact with each other is detected by the Y direction detector 19, and the Y coordinate Y _{1 is} detected.
Is stored in the control device 22. Next, the rotating shaft 11
By rotating the fixed scroll 4 by 90 °, the positional relationship between the fixed scroll 4 and the orbiting scroll 23 is adjusted to the position of 180 ° in FIG. 4, and the X table 2 is pushed to the minus side by the second pressing device 13. If it hits, the second pressing device 13
The undo and stored in the control unit 22 the X-coordinate of the X table 2 in a state where the fixed scroll 4 and the orbiting scroll 23 is in contact with the X coordinate X ₂ is detected by the X-direction detector 17. Next, the rotary shaft 11 is rotated by 90 ° to adjust the positional relationship between the fixed scroll 4 and the orbiting scroll 23 to the state of 270 ° in FIG. Hits the orbiting scroll 23, the fourth
Pressing device 15 based on the return to, Y-coordinate Y ₂ of Y table 1 with the fixed scroll 4 and the orbiting scroll 23 is in contact
Is stored in the control device 22. Next, based on the coordinate data of X ₁ , X ₂ , Y ₁ , and Y ₂ , the clearance and the positioning XY coordinates are obtained by the following equations.

Next, the XY table is positioned by the X-direction driving device 16 and the Y-direction driving device 18, the XY table is fixed by the X-direction pressing rod 20 and the Y-direction pressing rod 21, and the bolt 25 is tightened to complete the assembly.

According to this embodiment, with the scroll compressor assembled, the fixed scroll 4 is fixed to the XY table movable in the XY direction with the orbiting scroll 23 as a reference, and the orbiting scroll is
After pressing the first to fourth pressing devices in this order until it hits 23, the pressing device is returned to its original position, and the orbiting scroll 23
In order to detect the XY coordinates in the state where the fixed scroll 4 is in contact with and to calculate the clearance and positioning coordinates, not only the accuracy of the parts of the orbiting scroll 23 and the fixed scroll 4 but also the more used state including other components Close and accurate clearance and centering positioning are possible.

FIG. 5 is a front view of a centering device of a scroll compressor according to a second embodiment of the present invention.

In the figure, the same components as those in FIGS. 1 and 2 are denoted by the same reference numerals, and description thereof will be omitted.

The difference from FIG. 1 is that the θ table 28
, And the first fixed claw 3 and the second fixed claw 5 are placed thereon.

Therefore, according to the present embodiment, in addition to the effects obtained in the first embodiment, there is also an effect that the maximum clearance position can be determined with high accuracy by rotating the θ table 28 and detecting the XY clearance.

This method of adjusting the maximum clearance position is shown in FIGS.
This will be described with reference to FIGS. 6, 6 and 7. FIG.

FIGS. 6 and 7 are X-coordinate change diagrams in which the positional relationship between the fixed scroll 4 and the orbiting scroll 23 is set to 0 ° in FIG. 4, and the angle θ _{1 which} is considered to be the maximum clearance angle θ _{0 in} terms of component accuracy. mainly - in the side theta _2, rotated by theta ₃ the same amount in the + direction, the fixed scroll by the first pressing device 12 4
Back after pressing the orbiting scroll 23, the X-direction of the coordinate detected by the X-direction detector 17 in the state in which the fixed scroll 4 and the orbiting scroll 23 is in contact, and X _5, X _6, X ₇ respectively,
Calculating the maximum clearance angle theta ₀ about the maximum clearance angle theta ₀ varies linearly with the following procedure based on chevron become diagram symmetrical.

Figure 6 shows a condition which is between the maximum clearance angle theta ₀ is theta ₁ and theta _3, a x ₅ <x _7.

First determine the angle theta ₄ having the same coordinates as x ₇ by the following equation.

Because the maximum clearance angle θ ₀ is halfway between θ ₄ and θ ₃ Becomes

FIG. 7 shows that the maximum clearance angle θ ₀ is θ ₁ and θ
It indicates a condition that is between ₂ a x _5> x _7.

First determine the angle theta ₄ having the same coordinates as x ₅ by the following equation.

Since the maximum clearance angle θ ₀ is halfway between θ ₄ and θ ₂ Becomes

Therefore, according to the present embodiment, the fixed scroll 4 is rotated to the angular position of θ ₂ , θ ₃ rotated by the same angle on the + side and the − side around the angle θ ₁ which is considered to be the maximum clearance. X-direction pressing device in the state of FIG. 4O
After pressing at 12 and returning to the original position, the X coordinate is detected, and based on the fact that the change diagram of the X coordinate changes linearly, the maximum clearance angle θ ₀ and the X coordinate of at least three points are detected. Thus, it can be obtained with high accuracy.

As described above, according to the first aspect of the present invention, the fixed scroll and the orbiting scroll are engaged with each other, the bearing of the orbiting scroll is fixed, the orbiting scroll is rotated, and the fixed scroll and the orbiting moving with the rotation are rotated. Push the fixed scroll toward the center of rotation at the contact point with the scroll until it contacts the orbiting scroll, release the pressing force so that the fixed and orbiting scrolls are not distorted by the pressing force, obtain the XY coordinates, and reduce this operation. Calculate the center of coordinates from 4 directions of XY,
The fixed scroll and orbiting scroll are the center of positioning,
The centering method of the scroll compressor with half the distance between coordinates as the clearance enables accurate clearance and centering positioning closer to the use condition of the finished product.

Further, according to the second invention, a θ table having a fixing means for fixing the fixed scroll to the center of the table, an XY table on which the θ table is mounted, and a fixing means capable of fixing the bearing of the orbiting scroll so as not to move. A shaft rotating mechanism for rotating the rotating shaft of the orbiting scroll,
A pressing device that is arranged around the XY table and presses the fixed scroll toward the center of rotation of the orbiting scroll,
An X-coordinate detector and a Y-coordinate detector that detect the XY coordinates arranged in the XY direction of the table, an X-direction positioning device and a Y-direction positioning device that can position the XY table arranged in the XY direction of the XY table, and each mechanism Operating the XY table at the center of positioning of the fixed scroll and the orbiting scroll based on the coordinate data from the X coordinate detector and the Y coordinate detector. The present invention can be suitably implemented, and the fixed scroll can be fixed and positioned in the rotation direction. Therefore, the maximum clearance can be obtained, and the rotation of the fixed scroll can be positioned in the rotation direction while determining whether the clearance is optimal.

According to the third aspect of the present invention, the fixed scroll is set to θ.
The table is fed at least twice in the direction of rotation in the direction of rotation, and the fixed scroll is pushed toward the center of rotation so that the fixed scroll touches the orbiting scroll at each pitch. The amount of movement and the amount of movement are linear and symmetric about the maximum clearance position. Since the optimum clearance position is determined based on the change in the clearance, the optimum clearance position can be quickly and accurately determined.

[Brief description of the drawings]

FIG. 1 is a front view of a centering device of a scroll compressor according to a first embodiment of the present invention, FIG. 2 is a side view thereof, FIG. 3 is a cross-sectional view of the scroll compressor, and FIG. FIG. 5 is a front view of a scroll compressor centering device according to a second embodiment of the present invention, and FIGS. 6 and 7 are X-coordinate change diagrams. DESCRIPTION OF SYMBOLS 1 ... Y table, 2 ... X table, 3, 5, 6, 9 ... Fixed nail, 4 ... Fixed scroll, 7 ... Orbiting scroll bearing, 8 ... Support block, 10 ... Shaft rotating device ,
11… Rotating scroll rotating shaft, 12,13,14,15…
... pressing device, 16 ... X direction drive device, 17 ... X direction detector, 18 ... Y direction drive device, 19 ... Y direction detector,
20: X direction push rod, 21: Y direction push rod, 22: Control device, 23: orbiting scroll, 28 ...
θ table.

──────────────────────────────────────────────────の Continued on the front page (72) Inventor Hiroshi Karashi 1006 Kadoma Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. (72) Inventor Hiroyuki Fukuhara 1006 Odaka Kadoma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. Inside the company (72) Inventor Katsushi Onishi 1006 Kadoma, Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. (72) Inventor Keiji Hanada 1006 Kadoma, Oaza, Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. (56) Reference JP-A-62-203901 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) F04C 18/02 311

Claims (3)

(57) [Claims] The fixed scroll and the orbiting scroll are engaged with each other, and in a state where the fixed scroll and the orbiting scroll are in contact with each other, the bearing of the orbiting scroll is fixed and the orbiting scroll is rotated by 0 °, 90 ° and 180 °. , 270 ° sequentially, and at each rotation position of the orbiting scroll, the fixed scroll is moved toward the center of rotation until the fixed scroll comes into contact with the orbiting scroll. Find the coordinates, find the center of the coordinates from the X, Y coordinates detected at each of these rotational positions,
A centering method for a scroll compressor, wherein a center of positioning of a fixed scroll and an orbiting scroll is used. 2. A θ table having fixing means for fixing a fixed scroll at the center of the table, an XY table on which the θ table is mounted, a fixing means capable of fixing a bearing of the orbiting scroll so as not to move, and A shaft rotating mechanism that rotates the rotating shaft, a plurality of pressing devices that are arranged around the XY table and press the fixed scroll toward the center of rotation of the orbiting scroll, and an X coordinate that detects the XY coordinates arranged in the XY direction of the XY table Detector and Y-coordinate detector, X-direction positioning device and Y-direction positioning device that can position XY table arranged in XY direction of XY table, X-coordinate detector and Y
A centering device for a scroll compressor, comprising: a control device for controlling the movement of an XY table at the center of positioning of a fixed scroll and an orbiting scroll based on coordinate data from a coordinate detector. 3. The fixed scroll is fed at least twice in the rotational direction on the θ table in the rotational direction, and the fixed scroll is moved toward the center of rotation so as to be in contact with the orbiting scroll at every pitch. The scrolling centering method of a scroll compressor, characterized in that the optimum clearance position is obtained by changing the linearly and symmetrically around the maximum clearance position.