JP2007187049A - Scroll compressor aligning method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a scroll compressor aligning method for aligning a fixed scroll and a rotary scroll into the state of further simulating an operated condition with high accuracy. <P>SOLUTION: A scroll compressor has a compression part 1 in which scroll laps 12, 22 of the fixed scroll 10 and the rotary scroll 20 are engaged with each other to form a sealed operating chamber 40 inside. It is aligned in the state that the rotary scroll 20 is rotated in the direction of non-compression to form negative pressure in the sealed operating chamber 40. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a scroll compressor alignment method, and more specifically, relates to a scroll compressor alignment technique capable of stable alignment in a state close to an operating state.

  The scroll compressor forms a hermetic working chamber inside by meshing each scroll wrap formed in a spiral shape on the end plate of the fixed scroll and the orbiting scroll. The refrigerant is compressed by utilizing the fact that the formed crescent-shaped space moves from the outer periphery toward the center while decreasing the volume.

  By the way, in the scroll compressor, the positional relationship in a state in which the fixed scroll and the orbiting scroll are engaged, that is, the assembly accuracy such as the lap clearance of each scroll lap greatly affects the compressibility and durability of the refrigerant.

  Therefore, after assembling the fixed scroll and the orbiting scroll, it is necessary to position (align) at an appropriate position. Therefore, for example, as shown in Patent Document 1, the amount of XY displacement of the fixed scroll is measured in a state where the orbiting scroll is revolving, and the centering in the θ direction (θ rotation correction) and the centering in the XY direction are performed. Out (translation correction).

  However, the conventional alignment method has the following problems. That is, in the conventional alignment, the revolution direction of the orbiting scroll is not particularly limited, and alignment is performed while rotating the orbiting scroll in the same compression direction as during operation.

  Since the sealed working chamber is airtight even in the temporarily assembled state, when the orbiting scroll is revolved in the compression direction, the inside of the sealed working chamber becomes higher than the outside as the internal air is compressed. When the inside of the sealed working chamber becomes high pressure, the fixed scroll and the orbiting scroll repel each other in a direction away from each other.

  During normal operation, back pressure is applied to the back of the end panel of the orbiting scroll, so the orbiting scroll is pressed against the fixed scroll and is in a stable posture. Is easily affected by radial clearances such as the clearance of the main and swivel bearings, the eccentric amount of the swivel shaft, and the shape accuracy of the scroll wrap, making the motion unstable and the alignment unstable. .

That is, when the radial clearance is small, the torque variation during one rotation of the shaft tends to be large, and it is difficult to properly align the relative positions of the fixed scroll and the orbiting scroll.
JP 2003-184761 A

  Accordingly, the present invention has been made to solve the above-described problems, and an object of the present invention is to provide a scroll compressor capable of aligning the fixed scroll and the orbiting scroll with high accuracy in a state that more closely approximates the operating state. It is to provide an alignment method.

  In order to achieve the above-described object, the present invention has several features described below. According to the first aspect of the present invention, there is provided a compression portion formed by engaging the scroll laps of the fixed scroll and the orbiting scroll with each other to form a sealed working chamber therein, a main frame that supports the compression portion, and a tip thereof. Positioning the scroll wraps of a scroll compressor having a crankshaft connected to the orbiting scroll and including a drive shaft supported by the main frame while revolving the orbiting scroll via the drive shaft In the alignment method of the scroll compressor to be performed, the sealed operation chamber is aligned in a negative pressure state.

  A second aspect of the present invention is characterized in that, in the first aspect, the orbiting scroll is revolved in a non-compressing direction to make the sealed working chamber have a negative pressure.

  According to a third aspect of the present invention, in the first or second aspect, the fixed scroll and the orbiting scroll are meshed with each other, and an oil film is formed on the surface of the sealed working chamber.

  According to a fourth aspect of the present invention, there is provided a compression portion formed by engaging the scroll laps of the fixed scroll and the orbiting scroll with each other to form a sealed working chamber therein, a main frame that supports the compression portion, and a tip thereof. A crankshaft connected to the orbiting scroll and including a drive shaft pivotally supported by the main frame. The stationary scroll is compressed with a refrigerant suction port for drawing a refrigerant into the sealed working chamber. A refrigerant discharge port for discharging the high-pressure refrigerant and a bypass port for leaking a part of the refrigerant to the discharge side are provided, and the bypass port allows the high-pressure refrigerant to flow back into the sealed operation chamber. Positioning of the scroll wraps of the scroll compressor provided with a backflow prevention valve for preventing the rotation scroll through the drive shaft In aligning method of a scroll compressor which performs while revolving, it is characterized in that the core adjusting the closed working chamber in a negative pressure state.

  The invention according to claim 5 is characterized in that the orbiting scroll is revolved in a non-compressing direction to make the sealed working chamber have a negative pressure.

  According to the first aspect of the present invention, the centering is performed in a state where the sealed working chamber is in the negative pressure space, so that the orbiting scroll is attracted to the fixed scroll side, so that it is highly accurate in a state approximated to the operation state. Alignment is possible.

  According to the invention described in claim 2, by revolving the revolution direction of the orbiting scroll in the non-compression direction, the inside of the sealed working chamber is decompressed, and a negative pressure space can be created.

  According to the invention described in claim 3, by forming an oil film on the surface of the hermetically sealed working chamber in advance, it is possible to prevent air from leaking from a gap between the scroll wraps and to maintain a negative pressure space. .

  According to the fourth and fifth aspects of the present invention, when a bypass port that draws a part of the refrigerant to the discharge side is provided, a negative pressure space is provided by providing a backflow prevention valve at the bypass port. It is possible to prevent air from flowing into the sealed working chamber.

  Next, an example of an alignment apparatus for carrying out the alignment method of the present invention will be described with reference to the drawings. In the present invention, the axial direction of the drive shaft is the Z axis, the X axis and the Y axis are arbitrary orthogonal coordinate systems orthogonal to the Z axis, and the rotational direction about the Z axis is θ.

  As shown in FIG. 1, the alignment device 100 of the present invention includes a base 200 having a sturdy frame structure such as a metal, and the base 200 includes a pedestal 201 installed on a horizontal surface such as a floor, and the same pedestal. An L-shaped support frame 202 erected substantially perpendicularly from one end of 201.

  A support plate 310 that supports a fixed scroll moving unit 300 (to be described later) is fixed to the side wall surface of the support frame 202, and a second unit that moves the assembly unit 700 in the Z-axis direction at the tip of the support frame 202. A Z-axis linear rail 205 is provided. In addition to the linear rail, a normal hydraulic actuator or the like may be used.

  The support frame 202 is further provided with a control console 4 (control means) that measures, calculates, and outputs detection data sent from each detection means. The control console 4 incorporates a display monitor, various operation panels, and the like so that alignment accuracy and time can be set by inputting various set values.

  In this embodiment, the control console 4 is responsible not only for data processing of detection data but also for all command systems related to the alignment device of the present invention, such as control of various means and switch control. In this example, the control console 4 is a computer in which dedicated alignment control software is installed.

  Next, the compression unit 1 will be described. As shown in FIG. 2, the compression section 1 includes the scroll wraps 11, 21 that are vertically installed from the end plates 11, 21 of the fixed scroll 10 and the orbiting scroll 20. It is formed and held in the main frame 30 via an Oldham ring 50 for preventing rotation.

  In addition to FIG. 3A, the fixed scroll 10 is formed with a spiral scroll wrap 12 formed substantially perpendicular to the end plate 11. A refrigerant suction port 13 is provided on the outer peripheral side of the scroll wrap 12, and a refrigerant discharge port 14 for discharging the compressed refrigerant is provided in the center.

  The fixed scroll 10 is further provided with bypass holes 15a and 15b for leaking a part of the refrigerant to the discharge side so that the compression unit 1 is not damaged by the refrigerant liquefied due to abnormal operation or the like. In this example, two bypass holes 15a and 15b are provided.

  The discharge ports of the bypass holes 15a and 15b are preferably provided with a backflow prevention valve 16 for preventing the high-pressure refrigerant from flowing back toward the sealed working chamber 40 when the operation of the compression unit 1 is stopped. The backflow prevention valve 16 is provided so as to automatically close the bypass holes 15a and 15b when the pressure in the sealed working chamber 40 becomes negative.

  In this example, the fixed scroll 10 is provided with two bypass holes 15a and 15b for preventing breakage, but it goes without saying that it may be one. Moreover, as shown in FIG.3 (b), the structure which does not have a bypass hole may be sufficient.

  The main frame 30 is recessed one step on the upper surface side to accommodate the orbiting scroll 20, and a main bearing 31 that supports the main shaft 61 of the drive shaft 60 for orbiting the orbiting scroll 20 is provided at the center. Yes.

  A crankshaft 62 of the drive shaft 60 is pulled out above the main frame 30 with the main bearing 31 interposed therebetween. The crankshaft 62 is connected to a boss 23 provided on the back side of the end plate 21 of the orbiting scroll 20.

  The fixed scroll 10 and the main frame 30 are provided with positioning holes (not shown) for positioning the relative initial positions of the fixed scroll 10 and the main frame 30, and temporary pins are inserted into the positioning holes. Temporarily fixed in the state.

  Referring to FIGS. 1 and 2, a work table 206 for substantially performing the alignment work of the compression unit 1 is provided on a base 201 at a predetermined height by support columns 206 a and 206 b. The work table 206 is provided with an insertion hole 207 for pulling out the main shaft 22 drawn from the back side of the main frame 30 to the lower side of the work table 206.

  Elevating means 203 for moving the work table 206 up and down between the mounting position and the alignment position is provided on the columns 206a and 206b. The lifting / lowering means 203 is composed of, for example, a hydraulic actuator and is controlled by the control console 4. In this example, the lifting / lowering means 203 is provided, but a rotating column or the like may be provided in a part of the support frame 202, for example.

  On the work table 206, the main frame 30 of the compression unit 1 is supported so as to be capable of rotating by θ, and as a θ rotation correcting means for rotating the orbiting scroll 20 in the θ direction via the main frame 30 according to a command from the control console 4. The orbiting scroll rotation correcting means 400 is installed.

  In this example, the θ rotation correction means rotates the orbiting scroll 20 in the θ direction via the main frame 30, but conversely, the fixed scroll 10 side may be rotated. In this case, the θ rotation about the Z axis of the main frame 30 is constrained.

  On the pedestal 201, the motor 3 that is selectively connected to the drive shaft 60 of the orbiting scroll 20 through the coupling means 500 is provided. In this embodiment, the motor 3 is connected to the control console 4 via a signal line, and is controlled according to a command from the control console 4.

  The motor 3 is provided with an abnormality detection means 31 for detecting an alignment error when an abnormal torque is applied to the drive shaft 60 connected via the coupling means 500, for example, by contact between scroll wraps. ing. Similarly, this abnormality detection means 31 is connected to the control console 4 via a signal line, and sends a measurement signal to the control console 4.

  Referring again to FIG. 1, the fixed scroll moving unit 300 includes a support plate 310, an XY moving unit 320, and a Z-axis allowable support unit 330, and is substantially fixed to the tip of the Z-axis allowable support unit 330. Fixed scroll fixing means 340 is provided that contacts and fixes the scroll 10.

  Note that the fixed scroll moving means 300 is restricted from θ rotation about the Z axis, and can move the fixed scroll 10 arbitrarily in the X axis direction, the Y axis direction, and the Z axis direction.

  In this embodiment, the XY moving means 320 and the Z-axis allowable support means 330 are provided so as to move the fixed scroll 10, but may be provided so as to move the main frame 30, and in that case, the fixed scroll 10 is fixed. The movement of the scroll 10 in the XY direction is restricted.

  The support plate 310 is formed of an L-shaped frame having one end fixed to the support frame 202, and an XY movement unit 320 and a Z-axis allowable support unit 330 are provided on a part of the support plate 310. In this example, the support plate 310 is integrally fixed to the support frame 202. For example, the XY moving unit 320 and the Z-axis allowable support unit 330 are moved up and down via a lifting unit (not shown). May be.

  The XY moving unit 320 includes an X-axis support plate 321 that moves the fixed scroll 10 only in the X-axis direction, and a Y-axis support plate 322 that moves the fixed scroll 10 only in the Y-axis direction.

  The X-axis support plate 321 is slidably attached by a linear guide rail (not shown) formed between the support plate 310 and the X-axis support plate 321, and is driven according to a command from the control console 4.

  The Y-axis support plate 322 is slidably attached by a linear guide rail (not shown) formed between the X-axis support plate 321 and the Y-axis support plate 322, and similarly according to a command from the control console 4 Driven.

  A support stay 323 is provided on the upper surface side of the Y-axis support plate 322, and a Z-axis free rail 330 is provided on the distal end side of the support stay 323. The Z-axis free rail 330 has a so-called free rail mechanism that is always movable in the Z-axis direction, and functions as Z-axis permission means that allows the fixed scroll 10 to move in the Z-axis direction.

  The fixed scroll fixing means 340 is integrally provided on the lower end side of the Z-axis free rail 330 and is attached so as to cover the upper side of the fixed scroll 10. The fixed scroll fixing means 340 is provided with three clampers 341 for fixing the fixed scroll 10 at 120 ° intervals in this embodiment, and each clamper 341 clamps the fixed scroll 10 by driving means (not shown). Fix it.

  In this embodiment, the fixed scroll fixing means 340 fixes the fixed scroll 10 by a clamp mechanism by the clamper 341. Alternatively, the fixed scroll 10 may be attracted and fixed by an electromagnet or the like, and the fixed scroll 10 is moved. The configuration can be arbitrarily selected as long as it can be restrained.

  The support plate 310 is further provided with a fixed scroll pressing means 350 that presses and fixes the fixed scroll 10 from the Z-axis direction. The fixed scroll pressing means 350 has two fixing cylinders 351 arranged in parallel in the X-axis direction, and the tip of the fixing cylinder 351 protrudes and protrudes toward the upper surface of the fixed scroll 10, thereby Fix it. The fixing cylinder 351 is also controlled by the control console 4.

  As shown in FIGS. 1 and 2, the orbiting scroll rotation correcting means 400 includes a main frame holding unit 410 that holds the main frame 30 and a θ that can rotate the main frame holding unit 410 about the Z axis in the θ direction. Rotating means 420 is provided, and both are installed on the work table 206.

  The orbiting scroll rotation correction means 400 is restricted from moving in the X-axis direction and the Y-axis direction, and can only rotate in the θ rotation direction. The θ rotation means 420 is connected to the control console 4 through a signal line and is driven by a command from the control console 4.

  The θ rotation means 420 is generally a drive means such as a motor, and more preferably a rotary actuator. According to this, there is no functional problem even if the insertion hole 421 through which the drive shaft 60 is inserted is formed at the center with a high resolution and a high moving speed.

  A clamp portion 430 for fixing the main frame 30 is provided on the main frame mounting surface (upper surface in FIG. 1) of the main frame holding portion 410. A plurality of clamp portions 430 are formed at predetermined angular intervals around the Z axis, and in this embodiment, three clamp portions are formed at 120 ° intervals.

  Of the three clamp portions 430, one clamp portion 430 is provided with a cylinder 431 that is pushed out by hydraulic pressure, pneumatic pressure, solenoid, or the like. According to this, the movement of the main frame 30 can be restrained by pressing the main frame 30 against the other clamp part 430 as the cylinder 431 appears and disappears.

  The support plate 310 and the clamp unit 340 are further provided with displacement sensors 610 and 620 for measuring the amount of displacement of the fixed scroll 10 in the X-axis direction and the Y-axis direction, respectively.

  Each displacement sensor 610, 620 is connected to the control console 4 via a signal line, and outputs detection data detected by each displacement sensor 610, 620 to the control console 4. The displacement sensors 610 and 620 are preferably non-contact type displacement sensors. As a more specific aspect, a distance sensor that measures the amount of displacement of the fixed scroll 10 by a laser displacement meter or an eddy current displacement meter is used. It is done.

  In addition to this, the X-axis method of the XY moving unit 320 and the number of linear steps in the Y-axis direction may be counted, and the displacement amount may be measured based on the counted number.

  The coupling means 500 is a coupling means for coaxially connecting the output shaft of the motor 3 and the main shaft 22 of the drive shaft 60. In this embodiment, a collet chuck type coupling means is provided. In the present invention, since the specific structure of the coupling means 500 is arbitrary, the description thereof is omitted.

  Referring to FIG. 1 again, the aligning device 100 of the present invention is equipped with an assembling means 700 for assembling the centered compression portion 1 integrally. The assembling means 700 is attached to be vertically movable along the second Z-axis linear guide rail 205.

  The assembling means 700 includes a Z-axis linear guide 710 movably attached along the Z-axis linear rail 205, and a support plate 720 integrally extending from the Z-axis linear guide 710. Are mounted with fastening means 730 for fastening the fixed scroll 10 and the main frame 30 together.

  The Z-axis linear guide 710 is a so-called lifting unit that moves the entire assembly unit 700 in the vertical direction along the Z-axis. The Z-axis linear guide 710 is connected to the control console 4 via a signal line and is driven by a command from the control console 4. The

  The tightening means 730 includes three tightening cylinders 731 protruding from the upper surface side of the support plate 720, and each of the tightening cylinders 731 is erected at three positions at intervals of 120 ° around the Z axis. ing. Each tightening cylinder 731 includes a not-shown tightening jig supply means and the like. However, in the present invention, the assembling means is an optional component, and a specific description thereof will be omitted.

  Next, a specific alignment method of the alignment apparatus 100 of the present invention will be described according to the flowchart shown in FIG.

  First, before starting a substantial alignment work, the compression part 1 is installed in the alignment apparatus 100 in step ST1. After placing the compression unit 1 on the work bench 206 at the initial position shown in FIG. 1, a set button (not shown) is pushed. Thereby, the support base 206 is moved upward via the lifting means 203 of the support columns 206a and 206b, and is lifted to the initial position of the alignment work.

  After the setting is completed, when a start signal is transmitted from an input unit (not shown), the control console 4 once initializes the entire system (step ST2).

  After initialization, the control console 4 issues a command to the fixed scroll pressing means 350, and in response to this, the fixed scroll pressing means 350 lowers the fixing cylinder 351 and presses the upper surface of the fixed scroll 10 (step) ST3).

  Next, the control console 4 issues a command to the clamp unit 430, and the clamp unit 430 that has received the command causes the clamper 431 to protrude and fixes the main frame 30 (MF) to the main frame holding unit 410. The X-Y direction and θ rotation of 30 are constrained (step ST4).

  Further, the control console 4 issues a command to the fixed scroll fixing means 340. In response to this, the fixed scroll fixing means 340 drives each clamper 341 to fix the fixed scroll 10 from the side surface, and the XY moving means. The fixed scroll 10 is connected to 320 (step ST5). Through this preprocessing step, the control console 4 starts the alignment step.

  After fixing the compression unit 1, the control console 4 issues a command to the coupling means 500, and the coupling means 500 that has received the command is lifted up to the drive shaft 60 by an elevator means (not shown) and chucks the drive shaft 60 (step) ST6). Thereby, installation of the compression part 1 to the alignment apparatus 100 is completed.

  After the installation is completed, the operator presses a work resumption button (not shown) to resume the alignment work. In the alignment work, first, the control console 4 issues a command to the motor 3, and in response to this, the motor 3 starts to rotate and the orbiting scroll 20 starts to rotate via the drive shaft 60 (step ST7). .

  In the present invention, in order to perform the inside of the sealed working chamber 40 in a negative pressure state, the drive shaft 60 is rotated in the non-compression direction and the orbiting scroll 20 is revolved in the non-compression direction. According to this, by revolving the orbiting scroll 20 in the non-compression direction, the inside of the sealed working chamber 40 becomes a negative pressure space, and the orbiting scroll 20 is sucked toward the fixed scroll 10 and is brought into close contact therewith. That is, highly accurate alignment can be performed in a state that more closely approximates the operating state.

  In this example, as a method of making the inside of the sealed working chamber 40 have a negative pressure, the orbiting scroll 20 is rotated in the non-compression direction. May be produced.

  As a more preferable aspect, it is preferable to form an oil film in the sealed working chamber 40 such as the scroll wraps 12 and 22 of the fixed scroll 10 and the orbiting scroll 20. According to this, since the inside of the sealed working chamber 40 is covered with the oil film, the inside of the sealed working chamber 40 can be made airtight while suppressing air leakage as much as possible.

  Further, the oil injected into the sealed working chamber 40 diffuses from the center toward the outer peripheral side, so that the displacement detection measurement error that occurs when the oil is compressed by the scroll wraps 12 and 22 can be eliminated. Alignment can be performed mainly based on the contact amount between laps. Furthermore, by first oiling the sealed working chamber 40 in advance, it is not necessary to lubricate after assembly, so that the work process can be omitted.

  As a result, as shown in FIG. 5A, regardless of the radial clearance, the maximum value of torque per one shaft rotation can be greatly reduced as compared with the case of revolving in the compression direction. Further, as shown in FIG. 5B, the torque waveform can be aligned with a stable operation when the torque waveform is rotated in the non-compression direction as compared with the compression direction.

  Immediately after the start of rotation of the drive shaft, errors between the scroll wraps and the bearing portion tend to enter the data. Therefore, in step ST9, the control console 4 counts the number of rotations of the motor 3, that is, the number of rotations (n) of the drive shaft 60, and the drive shaft 60 has made at least the nth rotation (n> 3: n is a positive number). Thereafter, the control console 4 starts full sampling of the measurement values sent from the displacement sensors 610 and 620 (step ST8). In this embodiment, the measurement value is sampled from the start of rotation.

  Centering is performed in two stages of rotation correction and translation correction. First, rotation correction for correcting the relative angle between the fixed scroll 10 and the orbiting scroll 20 is performed.

  At the same time that the drive shaft 60 completes three rotations and enters the fourth rotation, the control console 4 issues a command to the orbiting scroll rotation correcting means 400, and in response to this, the orbiting scroll rotation correcting means 400 rotates by Δθ °. Then, the orbiting scroll 20 is rotated (step ST10). The ideal relative angle between the fixed scroll 10 and the orbiting scroll 20 is 180 °.

  Since the fixed scroll 10 and the orbiting scroll 20 are greatly deviated from the ideal relative angle in the initial state, the scroll wraps interfere with each other with the orbiting motion of the orbiting scroll 20, and the center of the fixed scroll 10 moves (rotates). Therefore, the amount of displacement in the X-axis direction and the Y-axis direction increases.

  Therefore, in the rotation correction, first, the XY moving unit 320 is turned off (free rail state), and the turning scroll 20 is rotated by Δθ ° in step ST10 while the turning scroll 20 is rotated. As described above, the displacement amount (displacement difference) in the X-Y axis directions starts to converge gradually, and the displacement amount becomes minimum when the optimum correction angle θc (in this example, the feed angle is 1.0 °). If the rotation continues further by Δθ °, the relative angles start to deviate from each other, and the displacement difference begins to increase again.

  Therefore, the control console 4 determines whether or not the optimum correction angle θc can be calculated based on the sampling data obtained in step ST11. If the control console 4 determines that it can be calculated using the sampling data, the process proceeds to the next step ST12. The origin of the quadratic curve is determined as the optimum correction angle θc, and the orbiting scroll rotation correcting means 400 is driven to rotate the orbiting scroll 20 to the position of the optimum correction angle θc via the main frame 30 to correct the rotation. Is finished (step ST13). If it is determined that calculation is not possible, the process returns to step ST7 and sampling is repeated until data that can be calculated is obtained. In this example, Δθ rotates the main frame 30 in increments of 0.1 °, and stops the rotation correction at a position where the displacement difference is 40 μm or more.

In this embodiment, the origin of the quadratic curve representing the displacement is recognized as the optimum correction angle θc. However, as shown in FIG. 5, the bottom of the quadratic curve representing the displacement difference is flat on the ship bottom. It may appear. In such a case, the control console 4 obtains two points θ1 and θ2 that have the same amount of displacement in the X-axis direction and the Y-axis direction,
θc = (θ1 + θ2) / 2
As an alternative, an average value of the rotation angles may be calculated, and this average angle may be determined as the optimum correction angle θc. The control console 4 determines a method for calculating one of the optimum correction angles θc in step ST11 according to the obtained sampling data.

  Next, translation correction is performed. In the present invention, translation correction is performed using the sampling data obtained during the rotation correction. When the displacement amounts in the X-axis direction and the Y-axis direction of the fixed scroll 10 obtained while the drive shaft makes one rotation are plotted, they appear in a ring shape as shown in FIG.

  According to this, when the feed angle is θa, the displacement amount is still large, and the plot shape that appears is a large ring. Next, when the feed angle is θb, the amount of displacement converges somewhat, but still becomes a large ring. When the feed angle is θc, the displacement amount is the smallest and contracts, so that it appears in a small ring shape.

Therefore, in step ST14, the control console 4 sets the maximum point in the X-axis direction of the locus of the fixed scroll 10 as Xmax, the minimum point as Xmin, the maximum point in the Y-axis direction as Ymax, and the minimum point as Ymin. The appropriate position (Xc, Yc) of the fixed scroll 10 is determined by performing the arithmetic processing described in Equation (1).

  According to this, the optimum position (Xc, Yc) of each of the scrolls 11 and 12 can be easily calculated in the manner of obtaining the center position of the sampling data, and the center accuracy is high. The sampling data is most preferably the feed angle θc in a state where the displacement amount is most converged, but may be other feed angles θa and θb.

Depending on the measurement data, the amount of displacement does not necessarily converge as θc. Therefore, as a second measurement method, the X axis direction and the Y axis direction of the fixed scroll 10 obtained when the drive shaft 60 makes one rotation. When the total sampling number of the trajectory of n is n, the control console 4 calculates the appropriate position (Xc, Yc) of the fixed scroll 10 by performing the arithmetic processing described in Equation 2 below.

  According to this, by calculating the average of the coordinate points of the total sampling number n by integral calculation and setting the center as the appropriate position (Xc, Yc) of the fixed scroll, unique data due to a sampling error is included. Even if it is, it is smoothed by integration, so that more stable positioning can be achieved.

Further, as the third method, as shown in FIG. 7, the optimal compensation angle of the orbiting scroll 20 and theta _C, the maximum displacement difference when the rotation angle of the orbiting scroll 20 across the optimum correction angle theta _C is θ1 Gap1, the center of the locus in the X-axis direction and the Y-axis direction at that time is (X _C1 , Y _C1 ), the maximum displacement difference when the rotation angle is θ2 is Gap2, and the X-axis direction and Y-axis direction at that time When the center of the trajectory is (X _C2 , Y _C2 ) and the relationship of Gap1≈Gap2 is established in the maximum displacement difference, the control console 4 performs the arithmetic processing described in the following Expression 3 to perform the appropriate position (Xc , Yc).

According to this, when the minimum correction point of the orbiting scroll 20 is θ _C and the optimum correction angle is θ _C , the fixed scroll 10 can Stable positioning can be performed by appropriate positions (Xc, Yc).

  In step ST11, the control console 14 determines the first to third calculation methods together with the state of the sampling data, selects the optimum calculation method, and performs translation correction.

  After the optimum position (Xc, Yc) for translation correction is determined, the control console 4 issues a command to the XY moving unit 320 in step ST15, and the XY moving unit 320 receives the command and receives the command. Is forcibly moved to the optimum position (Xc, Yc). This completes the centering operation.

  Next, the control console 4 issues a command to the assembling means 700 and the Z-axis linear guide 710, and in response to this, the Z-axis linear guide 710 starts descending and descends to just above the fixed scroll 10.

  Next, after the guide cylinder (both not shown) of the fastening means mounted in the assembly means 700 is lowered and the bolt screw is supplied to the fixing hole of the fixed scroll 10, it is passed through a fastening jig (not shown). Tighten the bolt screw. At this time, the control console 4 issues a command to the fixed scroll fixing means 340 to further increase the pressing force against the fixed scroll 10 so that the position of the fixed scroll 10 does not shift during bolt tightening. In the present invention, the assembling procedure of the assembling means 700 is arbitrary, and a detailed description thereof will be omitted.

  Finally, the compression unit 1 in the assembled state is rotationally driven, and the abnormality detection means 31 detects whether or not there is any abnormality in the rotational driving state (for example, torque or vibration). Stop and finish the alignment work (step ST17). If an abnormality occurs, the motor 3 is similarly stopped, and at the same time, a warning is displayed on the display unit of the control console 4 to notify that an abnormality has occurred (step 18). Note that the abnormality detection means 31 may be programmed to temporarily stop the work when an abnormality is found even during the alignment work. Thus, a series of alignment work and assembly work are completed.

  In this embodiment, the aligning device 100 is a device that can consistently perform the aligning operation and the assembling operation. For example, a pre-assembling device including a basic assembly and supply process of the compression unit 10 is used. Further, it may be incorporated, or it may be integrated into a packing apparatus or an assembling apparatus including a process for packing the compression unit 10 after alignment and an assembling process as a scroll compressor.

  As described above, according to the present invention, by performing alignment while revolving the revolution direction of the orbiting scroll 20 in the non-compression direction, the inside of the sealed working chamber 40 becomes a negative pressure space, and the orbiting scroll 20 is fixed. Alignment can be performed in a state of being in close contact with the 10 side, that is, in a state approximate to the operation state, and alignment (centering) can be performed with higher accuracy in a short time.

1 is an overall view of an alignment device for aligning a scroll compressor of the present invention. The schematic diagram of the state which attached the compression part to the alignment apparatus of the scroll compressor which concerns on one Embodiment of this invention. (A) Bottom view showing a fixed scroll provided with a bypass hole, (b) Bottom view showing a fixed scroll without a bypass hole. The flowchart explaining the flow of alignment work. (A) A graph showing the influence of the maximum torque value of one rotation of the shaft on the radial clearance when rotating in the compression direction and the non-compression direction, (b) One rotation of the shaft when rotating in the compression direction and the non-compression direction The graph showing the shaft torque in the inside.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Compression part 3 Motor 31 Abnormality detection means 4 Control console 10 Fixed scroll 20 Orbiting scroll 30 Main frame 40 Sealing working chamber 50 Oldham ring 60 Drive shaft 100 Centering device 200 Base 300 Fixed scroll moving means 400 Orbiting scroll rotation correction means 500 Cup Ring means 610, 620 Displacement detection means 700 Assembly means

Claims (5)

A compression part in which the scroll laps of the fixed scroll and the orbiting scroll are meshed with each other to form a sealed working chamber, a main frame that supports the compression part, and a crankshaft connected to the orbiting scroll at the tip A scroll compressor aligning method for positioning the scroll wraps of the scroll compressor including the drive shaft pivotally supported by the main frame while revolving the orbiting scroll via the drive shaft. ,
A method of aligning a scroll compressor, wherein the sealed working chamber is aligned in a negative pressure state.   2. The method of aligning a scroll compressor according to claim 1, wherein the orbiting scroll is revolved in a non-compression direction so that the sealed working chamber has a negative pressure.   The scroll compressor alignment method according to claim 1 or 2, wherein the fixed scroll and the orbiting scroll are meshed with each other, and an oil film is formed on a surface of the hermetic working chamber. A compression part in which the scroll laps of the fixed scroll and the orbiting scroll are meshed with each other to form a sealed working chamber, a main frame that supports the compression part, and a crankshaft connected to the orbiting scroll at the tip And a drive shaft that is pivotally supported by the main frame, and the fixed scroll has a refrigerant suction port for drawing the refrigerant into the hermetic working chamber, and a refrigerant discharge for discharging the compressed high-pressure refrigerant. An outlet and a bypass port for leaking a part of the refrigerant to the discharge side are provided, and the bypass port is provided with a backflow prevention valve for preventing the high-pressure refrigerant from flowing back into the sealed working chamber. In the scroll compressor, the scroll wraps are positioned with respect to each other while revolving the orbiting scroll via the drive shaft. In alignment method Lumpur compressor,
A method of aligning a scroll compressor, wherein the sealed working chamber is aligned in a negative pressure state. 5. The method for aligning a scroll compressor according to claim 4, wherein the orbiting scroll is revolved in a non-compression direction so that the sealed working chamber has a negative pressure.

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