JP2005140128A - Manufacturing device for scroll compressor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing method of a scroll compressor capable of easily reducing and uniformizing clearances between laps. <P>SOLUTION: The manufacturing method for the scroll compressor comprises steps of: temporarily fixing a fixed scroll 7 to a support frame 4 by a screw 36 while combining an oscillating scroll 8 with a rotary shaft 5 and inserting a positioning pin 31 in pin holes 34, 32 formed to face the fixed scroll 7 and the support frame 4, respectively; then pouring a pressurized fluid from a discharge port 14 provided in the fixed scroll 7; and adjusting positions of the fixed scroll 7 and the support frame 4 while revolving the oscillating scroll 8 by pressure of the pressurized fluid, and fixing the fixed scroll 7 and the support frame 4 by fastening the screw 36. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a scroll compressor manufacturing apparatus that performs compression by meshing a fixed scroll and a swing scroll.

  Conventionally, as disclosed in Patent Document 1, this type of scroll compressor has a fixed scroll having an end plate with a spiral wrap having an involute curve on the surface, and a spiral wrap having an involute curve on the surface. A swing scroll that has a mirror plate provided with a pair of key grooves and a boss hole on the back surface and meshes with the fixed scroll, and a plurality of swing scrolls and the fixed scroll. An electric element for turning the orbiting scroll with respect to the fixed scroll so as to compress the compression space gradually from the outside to the inside, and a pair of keys engaged with the keyway of the orbiting scroll And an Oldham ring (joint means) for revolving the orbiting scroll so as not to rotate with respect to the fixed scroll. To have.

The electric element is composed of a stator and a rotor having a rotation shaft in the center, and a pin portion provided eccentrically with the shaft center at the tip of the rotation shaft is engaged with the boss hole portion of the orbiting scroll. Then, the orbiting scroll is driven to turn by rotating the rotating shaft. Further, the rotating shaft of the electric element is pivotally supported by a support frame, and the fixed scroll is fixed to the support frame. Further, the lubrication and sealing between the wraps of the fixed scroll and the orbiting scroll and between the wrap and the end plate are configured by oil supplied through the rotation shaft.
JP-A-8-210264

  Here, the clearance between the wrap of the fixed scroll and the orbiting scroll becomes a very important problem in the performance of the scroll compressor. That is, if this clearance is too large, gas leaks from between the laps, and if the clearance is lost, the laps hit each other and noise increases. Therefore, there is a method of adopting a movable eccentric mechanism called a swing ring conventionally, but this has a problem that the structure becomes complicated and the number of parts increases and the cost increases.

  Therefore, conventionally, a method has been considered in which the clearance is determined by forming a pin hole as a reference in the fixed scroll and the support frame, and inserting positioning pins into these pin holes to define the positions of the fixed scroll and the support frame. However, the errors affecting the clearance include the eccentric amount of the rotating shaft, the spiral shape accuracy of the fixed scroll, the spiral shape accuracy and spiral coaxiality of the orbiting scroll, the pin hole position tolerance of the fixed scroll, and the pin hole of the support frame. Since there are many factors such as position tolerance, bearing clearance of the orbiting scroll, bearing clearance of the support frame, positioning pin clearance of the fixed scroll, positioning pin clearance of the support frame, positioning pin diameter size, how to determine the positioning pin and pin hole. Even if the accuracy of It becomes about 200 [mu] m, because the gas leakage increases enlarged wrap between clearance will not be expected even improved performance (COP).

  Therefore, in recent years, without using such a positioning pin, the fixed scroll is temporarily fixed to the support frame with screws, the pressurized scroll is poured from the discharge hole of the fixed scroll, and the orbiting scroll is turned in the reverse direction. Although a method of fastening the fixed scroll to the support frame after adjusting the position of the scroll and the support frame is considered, the error related to the positioning pin can be eliminated by this method, but the clearance between the laps is the same as the above example. In some cases, for example, non-uniformity occurs in a range of 0 to 100 μm, and gas leakage occurs at 100 μm and interference between wraps at 0 still exists.

  The present invention has been made to solve the conventional technical problems, and provides a scroll compressor manufacturing apparatus that can easily reduce and equalize the clearance between laps.

  A scroll compressor manufacturing apparatus according to the present invention includes a scroll compression element in an airtight container, an electric element for driving the scroll compression element, and a support frame having a bearing portion for pivotally supporting the rotating shaft of the electric element at the center. The scroll compression element is fixed to the support frame, and a scroll having a spiral wrap is erected on the surface of the end plate. Compressed by gradually reducing a plurality of compression spaces formed by meshing both wraps from the outside toward the inside, with a swing scroll with a spiral wrap standing on one side This is a device that manufactures a scroll compressor that combines a rotating scroll with a rotating shaft and is opposed to a fixed scroll and a support frame. With the positioning pin inserted into each formed pin hole, means for temporarily fixing the fixed scroll to the support frame with a fixing tool, means for injecting pressurized fluid from a discharge port provided in the fixed scroll, and this pressure The rotating scroll is swung by the pressure of the fluid, and the position of the fixed scroll and the support frame is adjusted, and the fixing scroll is fastened to fix the fixed scroll and the support frame.

  According to the present invention, since the swing scroll wrap pushes back the fixed scroll lap by the swirling by the pressurized fluid, the fixed scroll settles at a position where it does not contact the swing scroll wrap over the entire wrap. Become. Therefore, by setting the clearance between the positioning pin and the pin hole of the fixed scroll and the support frame within a predetermined allowable range, the clearance between the laps of both scrolls is limited by the clearance between the positioning pin and the pin hole. Within the range, it is possible to make uniform over the entire circumference.

  As a result, even if the precision related to the positioning pin is not strictly defined, the clearance between the laps is made uniform while being reduced over the entire circumference, so that the performance of the scroll compressor can be significantly improved and the noise can be reduced. It will be.

  As described above in detail, according to the present invention, the swinging scroll wrap pushes back the fixed scroll wrap by turning with the pressurized fluid, so that the fixed scroll does not contact the swing scroll wrap over the entire circumference of the wrap. To settle down in position. Therefore, by setting the clearance between the positioning pin and the pin hole of the fixed scroll and the support frame within a predetermined allowable range, the clearance between the laps of both scrolls is limited by the clearance between the positioning pin and the pin hole. Within the range, it is possible to make uniform over the entire circumference.

  As a result, even if the precision related to the positioning pin is not strictly defined, the clearance between the laps is made uniform while being reduced over the entire circumference, so that the performance of the scroll compressor can be significantly improved and the noise can be reduced. It will be.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. 1 is a longitudinal side view of a scroll compressor S to which the present invention is applied (a cross-section in the direction of line AA in FIG. 2), FIG. 2 is a partially cutaway top view of the scroll compressor S of FIG. 1, and FIG. 1 is a vertical side view of the scroll compressor S excluding the end cap 1B and the bottom cap 1C, FIG. 4 is a top view of the scroll compressor S of FIG. 3, and FIG. 5 is a front view of a terminal T portion of the scroll compressor S of FIG. FIG. 6, FIG. 6 is a top view of the state in which the scroll compression element 2 is removed from FIG. 4, FIG. 7 is a longitudinal side view of the scroll compression element 2 of the scroll compressor S of FIG. FIG. 9 is a vertical side view of the electric element 3 and the support frame 4 of the scroll compressor S of FIG.

  In each figure, 1 is a sealed container, and this sealed container 1 is composed of a cylindrical main body 1A, and a bowl-shaped end cap 1B and a bottom cap 1C that are welded and fixed to upper and lower ends of the main body 1A, respectively. Yes. And in the airtight container 1, the scroll compression element 2 is accommodated on the upper side, and the electric element 3 as drive means for driving the scroll compression element 2 is accommodated on the lower side. A support frame 4 is accommodated in the sealed container 1 between the scroll compression element 2 and the electric element 3, and the support frame 4 is formed with a bearing portion 6 that pivotally supports the rotating shaft 5 protruding downward. Has been.

  The scroll compression element 2 includes a fixed scroll 7 and a swing scroll 8. The fixed scroll 7 is shrink-fitted around the inner surface of the end cap 1B of the hermetically sealed container 1, and has a disk-like end plate 11 that divides the inside of the hermetically sealed container 1 into a high-pressure chamber 9 and a low-pressure chamber 10, It is composed of an involute erected on one surface (lower surface) or a spiral wrap 13 having a curve similar to this. A discharge hole 14 communicating with the high-pressure chamber 9 in the hermetic container 1 is formed at the center of the end plate 11 of the fixed scroll 7. And the fixed scroll 7 makes the protrusion direction of the wrap 13 downward.

  The orbiting scroll 8 includes a disc-shaped end plate 15, an involute erected on one surface (upper surface) of the end plate 15, or a spiral wrap 16 having a curve similar to the involute, and an end plate 15 and a boss hole portion 17 projecting from the center of the other surface (lower surface). The oscillating scroll 8 is arranged so that the protruding direction of the wrap 16 is upward and the wrap 16 is rotated 180 degrees to the wrap 13 of the fixed scroll 7 so as to face each other. A space 18 is formed.

  A pin 19 is provided at the tip (upper end) of the rotary shaft 5 and is inserted into the boss hole 17 of the orbiting scroll 8. The center of the pin 19 is provided eccentric to the axis of the rotary shaft 5. ing. Reference numeral 20 denotes an Oldham ring, which is positioned between the swing frame 8 and the lower support frame 4. The Oldham ring 20 has a pair of keys 21 and 21 formed so as to protrude upward at opposite positions, and a pair of key grooves 22 formed opposite to each other at positions shifted by 90 degrees from these keys 21 and 21. , 22.

  On the other hand, a pair of key grooves 23, 23 are formed in the peripheral portion of the other surface (lower surface) of the orbiting scroll 8, and the keys 21, 21 of the Oldham ring 20 are in the key grooves 23, 23. Engage slidably. A pair of key members 24, 24 having a substantially L-shaped cross section protrude downward and are screwed to the peripheral edge of the fixed scroll 7, and the key members 24, 24 are key grooves 22, 22 of the Oldham ring 20. Is slidably engaged with. At this time, the key members 24 and 24 protrude downward from a thrust bearing surface 26 of the support frame 4 described later. The Oldham ring 20 turns the swinging scroll 8 so as not to rotate with respect to the fixed scroll 7 and revolves on the circular orbit by such an engagement relationship.

  The thrust bearing surface 26 that supports the orbiting scroll 8 is formed in the center portion of the support frame 4, and the outer side of the thrust bearing surface 26 is inward from the peripheral portion at a position shifted by 90 degrees. The four cutouts 27 are formed by the four cutouts 27... So that the mounting arm portions 28... Projecting outward and downward from the thrust bearing surface 26 are formed 90 degrees apart from each other. ing. And two screw holes 29 are formed in the upper surface of the peripheral part of these attachment arm parts 28 ..., respectively. Furthermore, pin holes 32 and 32 for inserting positioning pins 31 are formed between the screw holes 29 and 29 of the pair of mounting arm portions 28 and 28 that face each other.

  The outer diameter of the mounting arm portions 28 of the support frame 4, that is, the outer diameter of the support frame 4, is set smaller than the inner diameter of the main body 1A of the sealed container 1.

  On the other hand, a total of eight screw holes 33 are formed through the periphery of the end plate 11 of the fixed scroll 7 at positions corresponding to the screw holes 29... Of the support frame 4. The pin holes 34 and 34 are also formed at positions corresponding to the pin holes 32 and 32 on the peripheral surface.

  A clearance (backlash) is formed between the positioning pin 31 and each of the pin holes 32 and 34, and this clearance is set in a range of 30 μm to 70 μm in the embodiment.

  Then, with the positioning pins 31 inserted into the pair of pin holes 32 and 34, screws 36 as fixing tools are inserted into the screw holes 33. The fixed scroll 7 is fixed to the support frame 4 by being screwed to and fastened. Thereby, the support frame 4 is fixed to the end cap 1 </ b> B of the sealed container 1 through the fixed scroll 7.

  On the other hand, the electric element 3 includes a stator (stator) 38 and a rotor 39 that rotates in the stator 38, and the rotating shaft 5 is fitted to the center of the rotor 39 to rotate the electric element 3. A part of the child 39 is formed. A crank portion 41 that is pivotally supported by the bearing portion 6 of the support frame 4 is formed on the upper end side (one end side) of the rotating shaft 5 and below the pin portion 19 at the tip of the rotating shaft 5. The lower part of the shaft 5 (below the rotor 39) is pivotally supported by the auxiliary bearing 42. The auxiliary bearing 42 is press-fitted into the inner surface of the main body 1 </ b> A of the sealed container 1.

  A plurality of screw holes 43 are formed through the auxiliary bearing 42, and through holes 44 are formed in the stator 38 of the electric element 3 at positions corresponding to the screw holes 43. Further, screw holes 46 are formed at positions corresponding to the through holes 44 on the lower surface of the attachment arm portions 28... Of the support frame 4. Then, the screw 47 is inserted into the screw hole 43 of the sub bearing 42, and the through hole 44 of the stator 38 is passed through and screwed into the screw hole 46 of the support frame 4, so that the sub bearing 42, the electric element 3 and the support are supported. The electric element 3 and the support frame 4 are fixed to the main body 1 </ b> A of the sealed container 1 through the auxiliary bearing 42.

  Oil is stored in the closed container 1 below the auxiliary bearing 42, and the lower end of the rotary shaft 5 is submerged in the oil. Then, the oil passes through the rotary shaft 5 and is supplied into the bearing portion and the scroll compression element 2, and between the crank portion 41 and the bearing portion 6, between the pin portion 19 and the boss hole portion 17, between the laps 13 and 16, and the lap. Lubricating and sealing between 13, 16 and the end plates 15, 11 are performed.

  On the main body 1A of the sealed container 1, a flat seat pressing portion 49 having a shape as shown in FIG. 5 is formed. The seat pressing portion 49 is configured by seating the main body 1 </ b> A inward from the outside, and a terminal T connected to the electric element 3 is attached to the seat pressing portion 49. The seat pressing portion 49 needs to be positioned at the height (side) of the support frame 4 above the electric element 3, but the seat pressing portion 49 is placed in the notch 27 of the support frame 4 as shown in FIG. 6. The support frame 4 is attached so as to be positioned. On the other hand, the key members 24, 24 of the fixed scroll 7 are positioned in the notches 27, 27 that are shifted by 90 degrees from the notches 27 where the seat pressing portions 49 are located, that is, the attachment of the terminal T The fixed scroll 7, the rocking scroll 8, and the Oldham ring 20 are arranged so that the key members 24, 24 of the fixed scroll 7 are positioned at a position shifted by approximately 90 degrees from the seat pressing portion 49.

  Since the key members 24, 24 of the fixed scroll 7 as described above protrude below the thrust bearing surface 26 of the support frame 4, when the key member 24 is positioned in the direction of the terminal T, the key member 24, the terminal T, Therefore, it is necessary to increase the position of the scroll compression element 2 and increase the size of the scroll compressor S. However, as described above, the key member 24 and the terminal T are shifted by about 90 degrees. Since the arrangement is adopted, such interference does not occur, and the size expansion can be prevented.

  Further, when the seat pressing portion 49 is seated, the main body 1A is deformed, but the outer diameter of the support frame 4 is set smaller than the inner diameter of the main body 1A of the sealed container 1 as described above. 4 is inserted into the main body 1A, the support frame 4 is compressed by the deformed main body 1A, and there is no risk of distortion.

  Reference numeral 51 denotes a suction pipe attached to the lower part of the main body 1 </ b> A of the sealed container 1, and the suction pipe 51 communicates with the low-pressure chamber 10 in the sealed container 1 below the electric element 3. Reference numeral 52 denotes a discharge pipe attached to the end cap 1 </ b> B of the sealed container 1, and the discharge pipe 52 communicates with the high-pressure chamber 9 in the sealed container 1. And the notch 27 ... of the said support frame 4 becomes a channel | path which guide | induces a refrigerant | coolant from the low pressure chamber 10 to the scroll compression element 2. As shown in FIG.

  Reference numerals 54 and 56 denote balancers (balance weights) attached to the rotary shaft 5 of the rotor 39 of the electric element 3 by shrink fitting or press fitting. The upper balancer 54 is connected to the pin portion 19 with respect to the axis of the rotary shaft 5. The lower balancer 56 is attached to the rotating shaft 5 above the coil end at the upper end of the rotor 39 at a symmetrical position, and the lower balancer 56 is the rotating shaft 5 between the coil end at the lower end of the rotor 39 on the same side as the pin portion 19 and the auxiliary bearing 42. Is attached.

  In particular, the upper balancer 54 extends upward from the coil end of the rotor 39, and further uses the space on the outer periphery of the bearing portion 6 of the support frame 4. The outer diameter of the upper balancer 54 is above the coil end of the stator 39. The rotor 39 is expanded so as to be larger than the outer diameter, and the upper portion is located on the outer periphery of the bearing portion 6 of the support frame 4. As a result, the center of gravity position (indicated by a black circle in FIG. 9) of the eccentric portion of the balancer 54 is moved upward, and is moved closer to the pin portion 19 and the swinging scroll 8 to be positioned on the outer periphery (same height) of the bearing portion 6. Further, since the position of the center of gravity is separated from the axis of the rotary shaft 5, the distance R (FIG. 9) from the axis to the position of the center of gravity is also made longer than before.

  As a result, even if the balancer 54 is lightened, it is possible to effectively eliminate the vibration caused by the eccentric movement of the pin portion 19 due to the moment. Further, since the center of gravity is located on the outer periphery of the bearing portion 6, the bending of the rotating shaft 5 is reduced, and the inconvenience that the crank portion 41 hits the bearing portion 6 can be suppressed. Further, since the balancer 54 is fixed to the rotating shaft 5 on the support frame 4 side from the rotor 39, sufficient mounting strength can be maintained even if the balancer 54 is extended to the outer periphery of the bearing portion 6.

  Next, 61 is a discharge valve attached to the other surface of the end plate 11 of the fixed scroll 7 (the upper surface opposite to the wrap 13). The discharge valve 61 is formed with a frame body 63 having a substantially gate-shaped cross section attached by screws 62 and 62 corresponding to the discharge hole 14 of the end plate 11, and opened to the side and the lower side in the frame body 63. It is comprised from the disc-shaped valve body 66 hold | maintained in the movement space part 64 made to be movable up and down. The center of the valve body 66 matches the center of the discharge hole 14. A contact surface 67 is formed on the upper surface of the moving space 64 of the frame 63.

  Further, a total of two first and second communication passages 68 and 69 are formed through the upper wall of the frame 63, and the lower ends of the communication passages 68 and 69 open at the contact surface 67, and the upper end Is open to the high-pressure chamber 9. Both the communication passages 68 and 69 extend in the vertical direction, and the first communication passage 68 opens on a contact surface 67 of a portion corresponding to a position off the center of the valve body 66. On the other hand, the second communication passage 69 is located at a position corresponding to the lower center of the end cap 1B, and a through hole 71 is formed at the center of the end cap 1B. A pipe 72 that is a part of a temperature detection device (not shown) is inserted into the second communication path 69, and the pipe 72 passes through the through hole 71 and is drawn out to the outside. In this pipe 72, a temperature sensing part of a temperature detecting device is built.

  Next, the assembly procedure of the scroll compressor S of the present invention will be described. First, the rotating shaft 5 is fitted to the rotor 39 of the electric element 3, and each balancer 54, 56 is attached to the rotating shaft 5 by press-fitting or shrink fitting and assembled. Then, the stator 38 of the electric element 3 is placed on the auxiliary bearing 42, and the through hole 44 is matched with the screw hole 43. Next, the rotor 39 in which the rotating shaft 5 and the balancers 54 and 56 are assembled is inserted into the stator 38, and the lower portion of the rotating shaft 5 is pivotally supported by the auxiliary bearing 42. Next, the support frame 4 is put on the stator 38, the screw hole 46 is matched with the through hole 44, and the crank portion 41 of the rotating shaft 5 is inserted into the bearing portion 6 to be pivotally supported. Then, as described above, the screw 47 is inserted from the auxiliary bearing 42 side in the order of the screw hole 43, the through hole 44, and the screw hole 46, and finally screwed into the screw hole 46, thereby supporting the support frame 4 and the electric element 3. And the sub bearing 42 is assembled in advance and integrated. This is the state shown in FIG. By assembling in such a procedure, the balancer 54 can be assembled without any trouble even if it is enlarged.

  Contrary to the procedure described above, the crank portion 41 of the rotating shaft 5 of the rotor 39 having the rotating shaft 5 and the balancers 54 and 56 is first supported on the bearing portion 6 of the support frame 4, and then Alternatively, the rotor 39 may be inserted into the stator 38, and then the lower end (the other end) side of the rotating shaft 5 may be pivotally supported by the auxiliary bearing 42. Even in such a procedure, the balancer 54 can be assembled without being in the way.

  On the other hand, the fixed scroll 7 is placed with the wrap 13 facing upward, and the oscillating scroll 8 with the wrap 16 facing downward is placed thereon, and the wraps 13 and 16 are engaged. Next, the Oldham ring 20 is placed on the orbiting scroll 8 with the keys 21 and 21 as the lower side, and the keys 21 and 21 are engaged in the key grooves 23 and 23 of the orbiting scroll 8. Next, the key members 24, 24 are screwed to the fixed scroll 7 at a position shifted by 90 degrees from the keys 21, 21 and the key grooves 23, 23, and each key groove 22 is protruded upward from the Oldham ring 20. , 22 are engaged. In this way, the scroll compression element 2 as shown in FIG. 7 is assembled.

  Next, as shown in FIG. 9, the support frame 4, the electric element 3 and the sub-bearing 42 are assembled in advance, and the main body 1A of the sealed container 1 is covered from above, and the whole is inserted into the main body 1A. Press fit into the inner surface of and fix. Next, the positioning pins 31 and 31 are inserted into the pin holes 32 and 32 of the support frame 4 as described above. Next, the Oldham ring 20 side of the scroll compression element 2 assembled in advance as shown in FIG. 7 is placed on the main body 1A, and the positioning pins 31, 31 are inserted into the pin holes 34, 34 of the fixed scroll 7, and screw holes 33. .. Are matched with the screw holes 29 of the support frame 4, and the pin portion 19 of the rotary shaft 5 is engaged with the boss hole portion 17 of the swing scroll 8 to combine the swing scroll 8 with the rotary shaft 5. .

  Then, as described above, the screws 36 are inserted into the screw holes 33... From the fixed scroll 7 side and screwed into the screw holes 29... Of the support frame 4. It is set in a temporarily fixed state without being fastened to 29.

  Next, the clearance between the wraps 13 and 16 of the scrolls 7 and 8 is adjusted in this state. FIG. 10 shows a configuration diagram of such an adjustment device 90. The adjusting device 90 includes, for example, a pump 91 for generating a pressurized fluid such as compressed air and nitrogen, a high pressure regulator 93, a constant pressure regulator 94, a switching valve 96, a connection coupler 97, and a pipe 92 connecting them. Etc.

  Then, first, the fixed scroll 7 temporarily fixed as described above is set on the fixing base 98 as shown in FIG. 10, and the main body 1A of the sealed container 1 is fixed. Then, the connection coupler 97 is connected to the discharge port 14 of the fixed scroll 7 to operate the pump 91. Then, pressurized fluid such as compressed air and nitrogen adjusted to a constant pressure P 1 by the high-pressure regulator 93 by the switching valve 96 flows into the compression chamber 18 from the discharge port 14 through the connection coupler 97.

  Due to the pressure of the fluid, the orbiting scroll 8 starts to turn in the direction opposite to the turning direction in which the refrigerant gas is compressed during the normal refrigerant compression operation. Even when the temporarily fixed fixed scroll 7 is not assembled at the proper position when temporarily fixed, the wrap 16 of the orbiting scroll 8 is applied with the wrap 13 of the fixed scroll 7 by turning the orbiting scroll 8. Pushing back through oil or the like, the fixed scroll 7 settles to a position where it does not contact the wrap 16 over the entire circumference of the wrap 13. In this state, the screws 36 are evenly tightened, and the fixed scroll 7 is fixed to the support frame 4 at an optimal position.

  At this time, the clearance between the positioning pin 31 and the pin holes 32 and 34 for positioning the fixed scroll 7 is set in the range of 30 μm to 70 μm as described above. The range in which 13 is pushed back is limited by the clearance between the positioning pin 31 and the pin holes 32 and 34. In the conventional rotational positioning method described above, for example, when the clearance is 0 to 100 μm, the clearance is 30 μm. When the thickness is set to 35 μm to 65 μm, the thickness is set to 15 μm to 85 μm when the thickness is 70 μm.

  As a result, the clearance between the wraps 13 and 16 can be reduced over the entire circumference (0 to 200 μm or 0 to 200 μm) over the entire circumference without strictly specifying the accuracy of the positioning pin 31 and the pin holes 32 and 34. In addition, it becomes possible to make uniform, so that the performance of the scroll compressor S can be remarkably improved and noise during operation can be reduced.

  After fixing the fixed scroll 7 and the support frame 4 with a predetermined tightening force of the screw 36 in this way, the pressure of the pressurized fluid flowing from the discharge port 14 is changed to a switching valve 96, a low pressure regulator 94 (pressurized fluid is kept constant). The pressure is reduced to a constant pressure P2.

  At this time, if the fixed scroll 7 is fastened to the support frame 4 at an inappropriate position, the side walls between the wraps 13 and 16 of the scrolls 7 and 8 come close to each other or come into contact with each other. The turning of the dynamic scroll 8 stops. Further, even when the bearing portion 6 of the support frame 4 and the auxiliary bearing 42 are not coaxial, the sliding resistance increases and the swing of the swing scroll 8 stops.

  Accordingly, the pressure P2 is determined by an allowable sliding resistance, and whether or not the rocking scroll 8 and the crank portion 41 can continue to rotate by the pressure P2 is detected by a sensor that detects sound, rotational speed, etc. The assembly accuracy is verified by detecting using a means capable of verifying pass / fail. As a result, it is possible to test whether or not the fixed scroll 7 is fastened to the support frame 4 at a correct position without using a conventional expensive torque meter or the like.

  After the fastening and verification between the fixed scroll 7 and the support frame 4 are completed in this way, the connection coupler 97 is removed from the fixed scroll 7, the discharge valve 61 is made to correspond to the discharge hole 14 of the end plate 11 of the fixed scroll 7, and the screw The pipe 72 is inserted into the communication path 69 from above. This state is the state of FIG.

  Next, the end cap 1B is shrink-fitted around the end plate 11 of the fixed scroll 7, and a high / low pressure seal is applied to the main body 1A. At that time, the pipe 72 is first erected as shown in FIG. Is inserted into the through-hole 71 of the end cap 1B, and then the end cap 1B is shrink-fitted onto the end plate 11 and covered with the main body 1A. At this time, since the communication path 69 is at a position corresponding to the center of the end cap 1B as described above, the pipe 72 also corresponds to the center of the end cap 1B, and the end cap 1B is inserted into the through hole 71 in the main body 1A. By covering, the end cap 1B is positioned with respect to the main body 1A, and the assembly becomes easy. Moreover, the restriction | limiting of the rotation direction at the time of shrink fitting is eased.

  As described above, the periphery of the end plate 11 of the fixed scroll 7 is shrink-fitted on the inner surface of the end cap 1B, and the end cap 1B is placed on the main body 1A, and then the periphery of the end cap 1B is welded and fixed to the main body 1A. Then, the bottom cap 1C is put on the lower end of the main body 1A, and the periphery is welded and fixed. And other piping is attached to the airtight container 1, and the scroll compressor S is completed. In this state, the scroll compression element 2, the support frame 4, the electric element 3, and the auxiliary bearing 42 are integrated in order from the top, and there are two points, that is, the shrink-fitted part around the end plate 11 of the fixed scroll 7 and the press-fitting part of the auxiliary bearing 42. It will be held in the sealed container 1.

  Next, the operation of the scroll compressor S of the present invention will be described. When the rotor 39 of the electric element 3 is rotated by power supply from the terminal T, the rotational force is transmitted to the orbiting scroll 8 via the rotary shaft 5.

  In other words, the orbiting scroll 8 is driven by the boss hole portion 17 inserted in the pin portion 19 of the rotating shaft 5 eccentrically with respect to the axis of the rotating shaft 5 and does not rotate with respect to the fixed scroll 7 by the Oldham ring 20. Can be revolved on a circular orbit. The fixed scroll 7 and the orbiting scroll 8 gradually reduce the compression space 18 formed between these wraps 13 and 16 from the outside to the inside, and from the suction pipe 51 to the low pressure chamber in the sealed container 1. 10, the refrigerant gas flowing through the electric element 3 and flowing through the notches 27... Of the support frame 4 is compressed.

  The compressed refrigerant is discharged into the high-pressure chamber 9 from the discharge hole 14 of the fixed scroll 7. The valve body 66 of the discharge valve 61 is lifted by the high-pressure refrigerant discharged from the lower discharge hole 14. The discharge hole 14 is opened apart from the discharge hole 14 and is in close contact with the contact surface 67. The refrigerant discharged from the discharge hole 14 enters the high-pressure chamber 9 through the side opening of the moving space 64 and is discharged from the discharge pipe 52 to the outside of the sealed container 1.

  On the other hand, when the electric element 3 stops and the rotation of the rotor 39 stops, the compression action as described above stops, so that the gas tries to flow backward through the discharge hole 14 to balance the pressure. Moreover, since the communication surface 68 is opened in the contact surface 67 and communicates with the high pressure chamber 9, the pressure in the high pressure chamber 9 becomes back pressure, and the valve body 66 is peeled off from the contact surface 67. The discharge hole 14 is closed by dropping downward. At this time, since the communication path 68 is opened at the contact surface 67 at a position shifted from the center of the valve body 66, the valve body 66 is peeled off from a position near the edge. Thereby, the discharge hole 14 is closed quickly by the valve body 66.

  In addition, a temperature sensing unit of a temperature detection device is built in the pipe 72, and when a discharge temperature (discharge refrigerant temperature) detected by the temperature sensing unit becomes a predetermined abnormal high temperature, a control device (not shown) A protection operation for stopping the electric element 3 is executed. At this time, since the temperature detection device can detect the discharge refrigerant temperature immediately after the discharge hole 14, the discharge temperature of the scroll compressor S is accurately detected, and the scroll compressor S is damaged due to the abnormally high temperature. Inconvenience can be avoided accurately.

  In the embodiment, the mounting frame 28 is formed at four positions in the support frame 4 with the position shifted 90 degrees, but the notch 27 is formed at three positions (120 degrees shifted) to form the mounting arm 28 at three positions. Alternatively, five or more attachment arm portions 28 may be formed. However, in any case, as described above, the terminal T and the key member 24 are arranged in the notch 27 so as not to coincide with each other.

It is a vertical side view (AA line direction cross section in FIG. 2) of the scroll compressor to which this invention is applied. It is a partially cutaway top view of the scroll compressor of FIG. It is a vertical side view except the end cap and bottom cap of the airtight container of the scroll compressor of FIG. It is a top view of the scroll compressor of FIG. It is a front view of the terminal part of the scroll compressor of FIG. FIG. 5 is a top view of the state where the scroll compression element is removed from FIG. 4. It is a vertical side view of the scroll compression element of the scroll compressor of FIG. It is a bottom view of the scroll compression element of FIG. It is a vertical side view of the electric element and support frame of the scroll compressor of FIG. It is a block diagram of the adjustment apparatus which performs the clearance adjustment between the laps of each scroll of the scroll compressor of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS S Scroll compressor 1 Airtight container 1A Main body 1B End cap 1C Bottom cap 2 Scroll compression element 3 Electric element 4 Support frame 5 Rotating shaft 6 Bearing part 7 Fixed scroll 8 Swing scroll 9 High pressure chamber 10 Low pressure chamber 11, 15 End plate 14 Discharge Hole 13, 16 Wrap 17 Boss hole 18 Compression space 19 Pin part 20 Oldham ring 21 Key 22, 23 Key groove 24 Key member 31 Positioning pin 32, 34 Pin hole 38 Stator 39 Rotor 41 Crank part 42 Sub bearing 61 Discharge Valve 90 Regulator 91 Pump 93 High pressure regulator 94 Low pressure regulator 96 Switching valve 97 Connecting coupler

Claims (1)

A scroll compression element is provided in the sealed container, and a support frame having a bearing portion for pivotally supporting the rotating shaft of the electric element is provided in the center, and the scroll compression element is fixed to the support frame, and the surface of the end plate A fixed scroll having a spiral wrap standing upright, and a swinging scroll having a swirl wrap standing on one surface of the end plate, which is pivoted by the rotary shaft with respect to the fixed scroll. , A scroll compressor manufacturing apparatus that compresses a plurality of compression spaces formed by meshing both wraps by gradually reducing the compression space from the outside to the inside,
The rotating scroll is combined with the orbiting scroll, and the fixed scroll is temporarily fixed to the support frame with a fixture in a state where a positioning pin is inserted into a pin hole formed opposite to the fixed scroll and the support frame. Means,
Means for pouring pressurized fluid from an outlet provided in the fixed scroll;
Means for adjusting the position of the fixed scroll and the support frame while rotating the orbiting scroll with the pressure of the pressurized fluid, and fixing the fixed scroll and the support frame by fastening the fixture;
An apparatus for manufacturing a scroll compressor, comprising: