JP3967533B2 - Scroll compressor centering method and centering apparatus - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a centering method and a centering device when assembling in a state where a fixed scroll and a turning scroll of a scroll compressor are engaged with each other.
[0002]
[Prior art]
Conventionally, as a method of centering a fixed scroll and an orbiting scroll when assembling a scroll compressor, for example, there is a method described in Japanese Patent Application Laid-Open No. Hei 2-221693.
[0003]
In such a centering method, first, the fixed scroll and the orbiting scroll are engaged with each other, the bearing of the orbiting scroll is fixed, the fixed scroll is fixed on the XY table, and the preparatory work for moving the fixed scroll to the reference position is performed. Thereafter, the position detection operation shown in (a to d) of FIG. 9 is performed. In the position detection operation, the shaft of the orbiting scroll 2 engaged with the fixed scroll 1 is sequentially rotated at a predetermined rotation angle to a plurality of predetermined rotation positions, that is, 0 °, 90 °, 180 °, and 270 °. Further, in the meantime, a plurality of pressing means arranged around the XY table, that is, one set of pressing means for pressing the X table individually on one side and the other side, and the Y table individually on one side and the other side A set of pressing means for pressing is sequentially driven, and the fixed scroll 1 is sequentially moved in the Y1 direction, the X1 direction, the Y2 direction, and the X2 direction at each rotational position to be brought into contact with the orbiting scroll 2. And the position of the XY direction in the fixed scroll 1 in the state contact | abutted to the turning scroll 2 is detected sequentially.
[0004]
Subsequently, the optimal center position in the XY direction of the fixed scroll 1 is calculated based on the detection result at each predetermined rotational position, and the fixed scroll 1 is positioned using the calculated optimal center position as the positioning center between the fixed scroll 1 and the orbiting scroll 2. After that (FIG. 9 (e)), the fixed scroll 1 and the bearing of the orbiting scroll 2 are fixed. Thereby, a good clearance can be secured between the fixed scroll 1 and the orbiting scroll 2.
[0005]
[Problems to be solved by the invention]
Here, when the scroll compressor is assembled, not only the centering accuracy of the fixed scroll 1 and the orbiting scroll 2 but also the speeding up of the centering operation is desired. In order to realize this, it is necessary to perform each of the above-described operations in a shorter time. However, in the above-described method, it is difficult to shorten the operation time of the position detection operation.
[0006]
That is, if the position detection operation is to be performed in a short time, each time the orbiting scroll 2 (shaft) is rotated to a predetermined rotational position (0 °, 90 °, 180 °, 270 °), a plurality of fixed scrolls 1 are moved. However, if the driving speed is increased too much, the driving force applied to the fixed scroll 1 from each pressing means, that is, the force that presses the fixed scroll 1 against the orbiting scroll 1 increases, and the position detection is performed. This is because the accuracy, that is, the centering accuracy is reduced. For this reason, there is a limit to the speeding up of the centering operation.
[0007]
The present invention has been made in view of such a conventional problem, and provides a centering method and a centering device for a scroll compressor capable of performing the centering operation of the fixed scroll and the orbiting scroll at high speed and precisely. The purpose is to do.
[0008]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, in the method of claim 1, the fixed scroll and the orbiting scroll are meshed to fix the orbiting scroll bearing, and the orbiting scroll is fixed with the orbiting scroll bearing fixed. Each time the rotating scroll is rotated to each predetermined rotational position, and the fixed scroll is sequentially moved in a direction corresponding to each predetermined rotational position using a plurality of moving means. A position detection step of sequentially detecting the position of the fixed scroll in the X and Y directions in contact with the orbiting scroll, and a calculation step of calculating an optimum center position based on the detection result at each predetermined rotation position; A scroll controller having a positioning step for positioning the fixed scroll and the orbiting scroll with the calculated optimum center position as the positioning center. In the centering method of the lesser, in the position detecting step, a plurality of moving means are driven in advance to apply a driving force in a plurality of directions corresponding to each predetermined rotational position to the fixed scroll, and to each predetermined rotational position of the orbiting scroll. In response to the rotation, the driving force of the moving means corresponding to each predetermined rotational position is sequentially switched to a driving force relatively stronger than the driving force of the other moving means, and the fixed scroll is moved in the direction corresponding to each predetermined rotational position. To move.
[0009]
In such a method, when the fixed scroll is sequentially moved in the direction corresponding to each predetermined rotational position in the position detection step and brought into contact with the orbiting scroll, all of the plurality of moving means apply driving force to the fixed scroll. Is in a state. Therefore, when the orbiting scroll is rotated to the respective fixed rotation positions, the accompanying fixed scroll can be instantaneously moved. Moreover, this can be done without impacting the fixed scroll.
[0010]
In the method of claim 2, when the driving force of the moving means corresponding to each predetermined rotational position is switched to a driving force relatively stronger than the driving force of the other moving means, the driving force is stepped. I changed it. In such a method, it is possible to reduce an impact generated when the fixed scroll comes into contact with the orbiting scroll.
[0011]
In the method of claim 3, when the driving force of the moving means corresponding to each predetermined rotational position is switched to a driving force relatively stronger than the driving force of the other moving means, the driving force is moderated. Changed to. Also in this method, it is possible to reduce the impact generated when the fixed scroll comes into contact with the orbiting scroll.
[0012]
According to another aspect of the present invention, the fixed scroll and the orbiting scroll are engaged with each other, and the orbiting scroll is sequentially rotated at a predetermined rotation angle to a plurality of predetermined rotation positions with the bearings of the orbiting scroll being fixed. Each time the is rotated to each predetermined rotational position, the fixed scroll is sequentially moved in a direction corresponding to each predetermined rotational position by using a plurality of moving means to contact the orbiting scroll, and the fixed scroll in the contacted state. Of the scroll compressor that positions the fixed scroll and the orbiting scroll using the calculated optimum center position as a positioning center, after the position in the X and Y directions is sequentially detected. in centering device, a plurality of air cylinders are the plurality of mobile means, operating to the plurality of air cylinders And electropneumatic regulator for supplying, to control the drive force of the plurality of directions to be applied to the fixed scroll by controlling the pressure supplied to the air cylinder by the electropneumatic regulator, rotating the orbiting scroll to each predetermined rotational position When the plurality of air cylinders are driven in advance and driving forces in a plurality of directions corresponding to the respective predetermined rotational positions are applied to the fixed scroll, the rotating scrolls are moved to the respective predetermined rotational positions according to the rotation to the predetermined rotational positions. was the driving force of the corresponding air cylinder that a sequential switching control means relatively strong driving force than the driving force of the other of the air cylinder.
[0013]
According to this configuration, when the fixed scroll is sequentially moved in the direction corresponding to each predetermined rotation position and brought into contact with the orbiting scroll, the movement of the fixed scroll is instantaneously performed without applying an impact to the fixed scroll. be able to.
[0014]
In addition, when the driving force in the direction corresponding to each predetermined rotational position of the orbiting scroll applied to the fixed scroll is sequentially switched to a driving force relatively stronger than the driving force in the other direction , it can be easily changed stepwise. Can be changed slowly.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a front view showing a schematic configuration of a centering device 11 of a scroll compressor according to the present invention, and FIG. 2 is a left side view of the centering device 11.
[0016]
The centering device 11 is set with the fixed scroll 1 and the orbiting scroll 2 (see FIG. 6) engaged with each other, and an XY table 13 is provided in the device main body 12. The XY table 13 includes a Y table 13b supported by the apparatus main body 12 and an X table 13a supported by the Y table 13b. On the X table 13a, a θ table 14 and a θ table rotating unit 16 having a θ-axis motor 15 that rotates the θ table 14 by pulse control are provided. The θ table 14 is provided with first fixing units 17 and 17 having first clamps 17 a and 17 a for fixing the fixed scroll 1. The apparatus main body 12 is provided with a base table 18, and a second clamp 19 a for fixing the bearing 3 of the orbiting scroll 2 that is engaged with the fixed scroll 1 at the lower part of the base table 18. A second fixed unit 19, 19 having 19a is provided. Further, a column 20 is erected on the apparatus main body 12, and a shaft rotation unit 21 having a shaft rotation motor 21a for rotating the shaft 4 of the orbiting scroll 2 is provided on the column 20 so as to be driven in the vertical direction. Yes.
[0017]
FIG. 3 is a plan view mainly showing the XY table 13. As shown in the drawing, around the XY table 13, an X-axis linear actuator 22 and an X-axis pressing cylinder 23 for moving and positioning the X table 13a are disposed on both ends in the X-axis direction. ing. The X-axis linear actuator 22 has a drive rod 24 that moves the X table 13a, and an X-axis motor 25 that drives the rod by pulse control. Similarly, a Y-axis linear actuator 26 and a Y-axis pressing cylinder 27 for moving and positioning the Y table 13b are disposed at both ends in the Y-axis direction. The Y-axis linear actuator 26 has a drive rod 28 that moves the Y table 13b, and a Y-axis motor 29 that drives it by pulse control.
[0018]
Further, around the XY table 13, a first X-axis pressing cylinder 30, which is a moving means of the present invention, and a first Y are arranged in the clockwise order from the side where the X-axis pressing cylinder 23 is disposed. A shaft pressing cylinder 31, a second X-axis pressing cylinder 32, and a second Y-axis pressing cylinder 33 are provided. The first X-axis pressing cylinder 30 and the second X-axis pressing cylinder 32 are actuators that press the X table 13a in opposition to each other. The first Y-axis pressing cylinder 31 and the second Y-axis pressing cylinder 31 The shaft pressing cylinder 33 is an actuator that presses the Y table 13b opposite to each other. Further, an X-axis position detector 34 for detecting the amount of movement from the reference position of the X table 13 a is disposed on the side of the X-axis pressing cylinder 23. A Y-axis position detector 35 that detects the amount of movement from the reference position of the Y table 13b is disposed on the side portion.
[0019]
In FIG. 1, the Y-axis pressing cylinder 27, the first Y-axis pressing cylinder 31, and the Y-axis position detector 35 described above are omitted. In FIG. The two X-axis pressing cylinders 32 are omitted. Further, below the XY table 13, a Y table restricting mechanism 36 that restricts the movement of the Y table 13b when the X table 13a moves, and conversely, an X that restricts the movement of the X table 13a when the Y table 13b moves. A table regulating mechanism 37 is provided.
[0020]
FIG. 4 is a block diagram showing an outline of the electrical configuration of the centering device 11 described above. The centering device 11 has a control device 41. The control device 41 includes a CPU (not shown), various recording media (for example, ROM and hard disk) in which a program is stored, a RAM that is a working memory, an input / output device, and the like. The above-described various actuators are controlled based on various setting data. The control device 41 is connected to the X-axis position detector 34 and the Y-axis position detector 35 described above, and detection signals from both detectors are input to the control device 41 during position detection work described later. The
[0021]
Further, the control device 41 includes the θ-axis motor 15, the shaft rotation motor 21a, the X-axis motor 25, and the Y-axis motor 29, the X-axis pressing cylinder 23, the Y-axis pressing cylinder 27, the first And first to sixth cylinder switches 42 for on / off control of the second X-axis pressing cylinders 30 and 32 and the second Y-axis pressing cylinders 31 and 33, and an electropneumatic regulator 43, respectively. It is connected. The electropneumatic regulator 43 individually adjusts the pressure of compressed air for driving supplied to the first and second X-axis pressing cylinders 30 and 32 and the first and second Y-axis pressing cylinders 31 and 33. The air pressure supplied to each of the cylinders 30, 32, 31, 33 changes according to the change in the control voltage sent from the control device 41.
[0022]
Next, the centering operation of the fixed scroll 1 and the orbiting scroll 2 by the centering device 11 having the above configuration will be described. Also in the present embodiment, during the centering operation, the fixed scroll 1 and the orbiting scroll 2 are engaged with each other, the bearing 3 of the orbiting scroll is fixed, and the fixed scroll 1 is fixed to the X table 13a. Then, the θ table 14 is rotated to rotate the fixed scroll 1 to a predetermined rotational position, and a preparatory work for moving the fixed scroll 1 to the reference position by the X-axis pressing cylinder 23 and the Y-axis pressing cylinder 27 is performed. After that, position detection work is performed.
[0023]
FIG. 5 is a timing chart showing operations of the shaft rotation motor 21a, the first and second X-axis pressing cylinders 30 and 32, and the first and second Y-axis pressing cylinders 31 and 33 in the position detection operation. 6A to 6D are explanatory views showing the state of the fixed scroll 1 and the orbiting scroll 2 at each time.
[0024]
In the position detection operation, first, the shaft rotation motor 21a is rotated to set the orbiting scroll 2 to the 0 ° rotation position as a reference. Further, the control device controls the supply pressure of the compressed air supplied from the electropneumatic regulator 43 to the first and second X-axis pressing cylinders 30 and 32, and the first and second Y-axis pressing cylinders 31 and 33, and The driving pressure of the Y-axis pressing cylinder 31 is set to a high pressure, the driving pressures of the other pressing cylinders 30, 32, 33 are set to a low pressure, and all the pressing cylinders 30 to 33 are advanced. Thus, after the fixed scroll 1 is moved in the Y1 direction and brought into contact with the orbiting scroll 2, the position of the fixed scroll 1 in the Y1 direction is detected based on the detection result of the Y-axis position detector 35. The “low pressure” is a pressure that secures a driving force necessary for maintaining the state in which the pressing cylinders 30, 32, and 33 are in contact with the X table 13a and the Y table 13b. And a pressure that secures a driving force capable of moving the fixed scroll 1, and both pressures are pressures set in advance according to the weight of the workpiece.
[0025]
Subsequently, the orbiting scroll 2 is set to a 90 ° rotation position, the set pressure of the first Y-axis press cylinder 31 is switched to a low pressure, and the set pressure of the first X-axis press cylinder 30 is switched to a high pressure. Thus, after the fixed scroll 1 is moved in the X1 direction and brought into contact with the orbiting scroll 2, the position of the fixed scroll 1 in the X1 direction is detected based on the detection result of the X-axis position detector 34. Next, the orbiting scroll 2 is set to a 180 ° rotation position, the set pressure of the first X-axis press cylinder 30 is switched to a low pressure, and the set pressure of the second Y-axis press cylinder 33 is switched to a high pressure. As a result, after the fixed scroll 1 is moved in the Y2 direction and brought into contact with the orbiting scroll 2, the position of the fixed scroll 1 in the Y2 direction is detected. Next, the orbiting scroll 2 is set to a rotational position of 270 °, the setting pressure of the second Y-axis pressing cylinder 33 is switched to a low pressure, and the setting pressure of the second X-axis pressing cylinder 32 is switched to a high pressure, Thus, after the fixed scroll 1 is moved in the X2 direction and brought into contact with the orbiting scroll 2, the position of the fixed scroll 1 in the Y2 direction is detected.
[0026]
Further, after the position detection operation is completed, the orbiting scroll 2 is returned to the 0 ° rotation position, and all the pressing cylinders 30 to 33 are retracted. Next, the optimal center position in the XY direction of the fixed scroll 1 is calculated at the position of the fixed scroll 1 detected at each rotational position of the orbiting scroll 2. Then, the fixed scroll 1 is positioned using the calculated optimum center position as the positioning center between the fixed scroll 1 and the orbiting scroll 2 (FIG. 6E), and the bearings of the fixed scroll 1 and the orbiting scroll 2 are fixed. Thereby, a good clearance can be secured between the fixed scroll 1 and the orbiting scroll 2.
[0027]
Here, in the position detection operation described above, since the position detection is performed in a state where all the pressing cylinders 30 to 33 are in contact with the X table 13a and the Y table 13b, the orbiting scroll 2 is moved to each rotational position. The fixed scroll 1 can be moved instantaneously after rotating to the right. Therefore, as compared with the conventional method of driving the pressing means such as the pressing cylinders 30 to 33 each time the orbiting scroll 2 is rotated to each rotation position, the time T required for the position detection work is shortened. . In addition, it can be performed without applying an impact to the fixed scroll 1 when the fixed scroll 1 starts to move. Therefore, the centering operation of the fixed scroll 1 and the orbiting scroll 2 can be performed faster and more accurately than in the past.
[0028]
In the present embodiment, the first Y-axis press that first presses the fixed scroll 1 at the time when the pressing cylinders 30 to 33 are brought into contact with the X table 13a and the Y table 13b prior to the position detection operation. Since only the driving pressure of the cylinder 31 is set to a high pressure in advance, the centering operation between the fixed scroll 1 and the orbiting scroll 2 can also be speeded up.
[0029]
In the above-described position detection operation, the rotation position of the orbiting scroll 2 is set to 0 °, 90 °, 180 °, and 270 °, and the fixed scroll 1 is moved in four directions according to the rotation position to detect the position. However, for example, even when the rotational position of the orbiting scroll 2 is set to 0 °, 45 °, 90 °,... 315 ° and the fixed scroll 1 is moved in eight directions accordingly to detect the position, the rotational position is set to each rotational position. Accordingly, the same effect can be obtained by keeping the pressing means for moving the fixed scroll 1 in contact with the fixed scroll 1 at all times.
[0030]
In the present embodiment, the set pressure of each of the pressing cylinders 30 to 33 corresponding to the rotational position of the orbiting scroll 2 is switched from low pressure to high pressure, and driving force in four directions is applied to the fixed scroll 1 in order. On the contrary, the fixed pressure of the other pressing cylinder is changed from the high pressure to the low pressure while the set pressure of the predetermined pressing cylinder corresponding to the rotational position of the orbiting scroll 2 is kept high. You may make it apply the driving force to 4 directions in order.
[0031]
Further, in the present embodiment, a case has been described in which the set pressure of a predetermined pressing cylinder corresponding to the rotational position of the orbiting scroll 2 is simply switched from a low pressure to a high pressure. Thus, the set pressure may be gradually changed from low pressure to high pressure, or the set pressure may be gradually changed from low pressure to high pressure as shown in FIG. In that case, since the impact generated when the fixed scroll 1 contacts the orbiting scroll 2 can be reduced, the effect of shortening the time T required for the position detection operation is somewhat less than the method shown in FIG. Although it decreases, the centering accuracy can be improved. Moreover, this method can be easily implemented in a configuration in which the set pressure of each of the pressing cylinders 30 to 33 is controlled using the electropneumatic regulator 43 as in the centering device 11 described above.
[0032]
7 and 8, the set pressures of the other press cylinders are switched from the high pressure to the low pressure while the set pressure of the predetermined press cylinder corresponding to the rotational position of the orbiting scroll 2 is kept high. Thus, the driving force in four directions may be applied to the fixed scroll 1 in order.
[0033]
【The invention's effect】
As described above, in the centering method and the centering device of the present invention, when the fixed scroll and the orbiting scroll are positioned, when the orbiting scroll is rotated to each constant rotation position, the movement of the fixed scroll is instantaneously performed. It is possible to do this without impacting the fixed scroll. Therefore, the centering operation of the fixed scroll and the orbiting scroll can be performed at high speed and precisely. In addition, the impact generated when the fixed scroll comes into contact with the orbiting scroll can be reduced, and the centering accuracy can be further improved.
[Brief description of the drawings]
FIG. 1 is a front view of a centering device showing an embodiment of the present invention.
FIG. 2 is a left side view of the centering device.
FIG. 3 is a plan view showing an XY table.
FIG. 4 is a block diagram showing an outline of the electrical configuration of the centering device.
FIG. 5 is a timing chart illustrating a procedure of position detection work according to the present embodiment.
FIG. 6 is an explanatory diagram showing the position detection operation.
FIG. 7 is a timing chart showing the procedure of another position detection operation.
FIG. 8 is a timing chart showing the procedure of another position detection operation.
FIG. 9 is an explanatory diagram showing a procedure of position detection work in the prior art.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Fixed scroll 2 Orbiting scroll 3 Bearing 4 Shaft 11 Centering device 13 XY table 22 X-axis linear actuator 23 X-axis pressing cylinder 26 Y-axis linear actuator 27 Y-axis pressing cylinder 30 1st X-axis pressing cylinder 31 First Y-axis pressing cylinder 32 Second X-axis pressing cylinder 33 Second Y-axis pressing cylinder 34 X-axis position detector 35 Y-axis position detector 41 Controller 43 Electropneumatic regulator

Claims (4)

A preparation process for engaging the fixed scroll and the orbiting scroll to fix the bearing of the orbiting scroll, and rotating the orbiting scroll sequentially to a plurality of predetermined rotation positions at a predetermined rotation angle with the bearing of the orbiting scroll fixed. Each time it is rotated to each predetermined rotation position, the fixed scroll is sequentially moved in a direction corresponding to each predetermined rotation position by using a plurality of moving means, and is brought into contact with the orbiting scroll. Position detection step for sequentially detecting the position in the XY direction, calculation step for calculating the optimum center position based on the detection result at each predetermined rotation position, and positioning of the fixed scroll and the orbiting scroll with the calculated optimum center position as a positioning center In a scroll compressor centering method comprising a positioning step for performing
In the position detecting step, a plurality of moving means are driven in advance to apply driving forces in a plurality of directions corresponding to the respective predetermined rotational positions to the fixed scroll, and according to the rotation of the orbiting scroll to the respective predetermined rotational positions, The driving force of the moving means corresponding to the predetermined rotational position is sequentially switched to a driving force relatively stronger than the driving force of the other moving means, and the fixed scroll is moved in the direction corresponding to each predetermined rotational position. Scroll compressor centering method.   2. The driving force is changed stepwise when the driving force of the moving means corresponding to each predetermined rotational position is switched to a driving force relatively stronger than the driving force of other moving means. The scroll compressor centering method described.   2. The driving force is gradually changed when the driving force of the moving means corresponding to each predetermined rotational position is switched to a driving force relatively stronger than the driving force of other moving means. How to center the scroll compressor. Each time the orbiting scroll is rotated to a plurality of predetermined rotation positions at a certain rotation angle with the fixed scroll and the orbiting scroll being engaged, and the bearings of the orbiting scroll are fixed, a plurality of times each time the orbiting scroll is rotated to each predetermined rotation position. The fixed scroll is sequentially moved in the direction corresponding to each predetermined rotational position using the moving means to contact the orbiting scroll, and the position of the fixed scroll in the XY direction in the contacted state is sequentially detected, In a centering device of a scroll compressor that calculates an optimum center position based on a detection result at a predetermined rotational position and positions the fixed scroll and the orbiting scroll with the calculated optimum center position as a positioning center,
A plurality of air cylinders as the plurality of moving means;
An electropneumatic regulator for supplying operating pressure to the plurality of air cylinders;
By controlling the supply pressure to each air cylinder by the electropneumatic regulator, the driving force in a plurality of directions applied to the fixed scroll is controlled, and when the orbiting scroll is rotated to each predetermined rotation position, the plurality of air cylinders are controlled. Drive in advance and apply driving force in a plurality of directions corresponding to each predetermined rotational position to the fixed scroll, and according to the rotation of the orbiting scroll to each predetermined rotational position, the driving force of the air cylinder corresponding to each predetermined rotational position Control means for sequentially switching to a driving force relatively stronger than the driving force of other air cylinders ;
A scroll compressor centering device characterized by comprising:

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