JP6204851B2 - Compressor manufacturing method - Google Patents

Description

Embodiments of the present invention relates to a method for manufacturing a compressor.

  2. Description of the Related Art Conventionally, a compressor including a compression mechanism that compresses a working fluid such as a gas refrigerant and a discharge valve device that opens and closes a discharge hole through which the compressed working fluid is discharged is known. For example, it is described in the following Patent Document 1.

  In a discharge valve device for a compressor described in Patent Document 1 below, a concave digging portion is formed in a bearing in which a discharge hole is formed, and a reed valve that opens and closes the discharge hole is accommodated in the digging portion. . The reed valve has a fixed support portion formed at one end, a valve head that opens and closes the discharge hole at the other end, and is fixed to the bearing by riveting the fixed support portion.

  When riveting the reed valve, it is necessary to position the reed valve so that the valve head and the discharge hole are in an optimal positional relationship. In order to position the reed valve, a guide part is formed on the fixed support part side of the reed valve, and this guide part is brought into contact with the side wall of the dug part so that the reed valve does not rotate during rivet tightening. .

JP 2004-116413 A

  However, in order to position the reed valve by bringing the guide portion of the reed valve into contact with the side wall of the digging portion, the side wall of the digging portion must be accurately formed according to the size and position of the guide portion. In addition, it takes time to form the digging portion and increases the manufacturing cost.

  In addition, in order to open and close the reed valve smoothly, the reed valve opens and closes when the reed valve opens and closes the discharge hole, and the opening and closing operation starting point that is the starting point of the opening and closing operation is located on the valve head side from the guide part. It is necessary to prevent the movable part that touches against the side wall of the digging portion. By forming the guide portion in the reed valve, the total length of the reed valve, which is the distance from the fixed support portion to the valve head in the reed valve, is increased. When the reed valve becomes longer, when the rivet is tightened, the valve head and the discharge hole are generated when the reed valve rotates due to a slight clearance between the guide part and the side wall of the dug part. The amount of deviation increases. Even if this deviation amount becomes large, it is necessary to increase the diameter of the valve head in order for the valve head to reliably close the discharge hole when the valve is closed. And, when the diameter of the valve head is increased, the weight of the valve head increases and the responsiveness of the open / close operation of the reed valve decreases. As a result, the impact force that collides with the valve seat formed in the cylinder increases and the valve cracks, resulting in a decrease in the performance and reliability of the compressor.

  Further, when the total length of the reed valve is increased by forming the guide portion, the material cost of the reed valve is increased.

  Further, when the overall length of the reed valve is increased by forming the guide portion, the size of the digging portion that accommodates the reed valve is increased, and the rigidity of the bearing is reduced by forming the digging portion having a large size in the bearing.

An object of an embodiment of the present invention is to prevent a valve head of a reed valve from being displaced with respect to a discharge hole when the reed valve is fixed to a discharge hole forming member in which a discharge hole is formed. It is providing the manufacturing method of the compressor which has a discharge valve apparatus which can form the diameter of a part small.

  The compressor manufacturing method according to the embodiment includes a compression mechanism that compresses the working fluid, and a discharge valve device that opens and closes a discharge hole through which the compressed working fluid is discharged. A reed valve formed on the discharge hole forming member and surrounding the periphery of the discharge hole. In a method for manufacturing a compressor having a valve seat, a step of forming an arc-shaped side wall in which the center of the arc is concentric with the center of the valve seat in the discharge hole forming member, and a mounting jig positioned in contact with the arc-shaped side wall And a step of positioning the reed valve using the mounting jig, and a step of fixing the reed valve positioned by the mounting jig.

It is a block diagram of the refrigerating-cycle apparatus containing the compressor shown by the cross section. It is a top view which shows the attachment structure of the reed valve to a main bearing. It is a top view which shows the accommodation state of the reed valve to a dug part. It is sectional drawing which shows the accommodation state of the reed valve and valve presser to a dug part. It is a top view which shows the state which positions and fixes a reed valve and a valve presser using an attachment jig.

  Hereinafter, an embodiment will be described with reference to the drawings. FIG. 1 shows an overall configuration of a refrigeration cycle apparatus 1. This refrigeration cycle apparatus 1 includes a compressor body 2 and an accumulator 3, and compresses a gas refrigerant that is a working fluid, and a compressor. A condenser 5 connected to the main body 2 for condensing the high-pressure gas refrigerant discharged from the compressor main body 2 into a liquid refrigerant, an expansion device 6 connected to the condenser 5 for reducing the pressure of the liquid refrigerant, and an expansion device 6 and an accumulator 3, and an evaporator 7 for evaporating the liquid refrigerant. The accumulator 3 and the compressor body 2 are connected by a suction pipe 8 through which a gas refrigerant flows.

  The compressor body 2 has a sealed case 9 formed in a cylindrical shape, and an electric motor unit 10 located on the upper side and a compression mechanism unit 11 located on the lower side are accommodated in the sealed case 9. Yes. The electric motor unit 10 and the compression mechanism unit 11 are connected via a rotating shaft 12 having a vertical center line and rotating around the center line.

  The electric motor unit 10 is a part that drives the compression mechanism unit 11. The electric motor unit 10 includes a rotor 13 that is fixed to the rotary shaft 12 and a stator 14 that is fixed to the sealing case 9 and disposed at a position surrounding the rotor 13. Have. The rotor 13 is provided with a permanent magnet (not shown), and a current-carrying coil (not shown) is wound around the stator 14.

  The compression mechanism part 11 is a part which compresses a gas refrigerant, and has the 1st compression element 16a and the 2nd compression element 16b which are located up and down via the partition plate 15. FIG.

  The first compression element 16a located on the upper side has a first cylinder 17a, the lower end side of the first cylinder 17a is closed by the partition plate 15, and the upper end side of the first cylinder 17a is supported so that the rotary shaft 12 can rotate. The first discharge hole forming member is closed by the main bearing 18a. A first cylinder chamber 19a is formed in the first cylinder 17a by closing the upper and lower ends of the first cylinder 17a with the main bearing 18a and the partition plate 15. The first cylinder chamber 19a and a second cylinder chamber, which will be described later, pass through the rotary shaft 12, and a first eccentric portion 20a is formed in a portion of the rotary shaft 12 located in the first cylinder chamber 19a. The first roller 21a is fitted to the portion 20a. The first roller 21a is arranged to rotate eccentrically while the outer peripheral surface thereof is in line contact with the inner peripheral surface of the first cylinder 17a when the rotary shaft 12 rotates. The first compression element 16a includes the first cylinder 17a, the first eccentric portion 20a, the first roller 21a, a blade described later that partitions the first cylinder chamber 19a into two spaces (a suction chamber and a compression chamber described later), and the like. It is comprised by.

  The second compression element 16b located on the lower side has the same configuration as the first compression element 16a described above, and has a second cylinder 17b. The upper end side of the second cylinder 17b is closed by the partition plate 15, The lower end side of the cylinder 17b is closed by a secondary bearing 18b that is a second discharge hole forming member that rotatably supports the rotary shaft 12. A second cylinder chamber 19b is formed in the second cylinder 17b by closing the upper and lower ends of the second cylinder 17b with the partition plate 15 and the auxiliary bearing 18b. The rotating shaft 12 is penetrated through the second cylinder chamber 19b, and a second eccentric portion 20b is formed in a portion of the rotating shaft 12 located in the second cylinder chamber 19b. The second eccentric portion 20b includes a second roller. 21b is fitted. The second roller 21b is arranged to rotate eccentrically while the outer peripheral surface thereof is in line contact with the inner peripheral surface of the second cylinder 17b when the rotary shaft 12 rotates. The second compression element 16b includes a blade described later that partitions the second cylinder 17b, the second eccentric portion 20b, the second roller 21b, and the second cylinder chamber 19b into two spaces (a suction chamber and a compression chamber described later). It is comprised by.

  The main bearing 18a, which is a discharge hole forming member, is formed with a first discharge hole 22a through which the gas refrigerant compressed in the first compression element 16a is discharged, and the secondary bearing 18b, which is a discharge hole forming member, has a second bearing. A second discharge hole 22b through which the gas refrigerant compressed in the compression element 16b is discharged is formed. The main bearing 18a is provided with a first discharge valve device 23a for opening and closing the first discharge hole 22a, and the auxiliary bearing 18b is provided with a second discharge valve device 23b for opening and closing the second discharge hole 22b. Yes. Further, a first muffler 24a is attached to the main bearing 18a so as to cover the first discharge valve device 23a and into which the gas refrigerant discharged from the first discharge hole 22a flows. The sub-bearing 18b is provided with a second muffler 24b that is disposed at a position covering the second discharge valve device 23b and into which the gas refrigerant discharged from the second discharge hole 22b flows. In the first muffler 24a and the second muffler 24b, a communication path (not shown) formed through the auxiliary bearing 18b, the second cylinder 17b, the partition plate 15, the first cylinder 17a, and the main bearing 18a. It is communicated by. The first muffler 24 a is formed with a communication hole 25 through which the gas refrigerant that has flowed into the first and second mufflers 24 a and 24 b flows into the sealed case 9.

  The first discharge valve device 23a is formed on the main bearing 18a, a first reed valve 26a having one end fixed to the main bearing 18a and a valve head (described later) that opens and closes the first discharge hole 22a on the other end. A concave first digging portion 27a that accommodates the first reed valve 26a, an annular first valve seat (to be described later) formed around the first discharge hole 22a in the first digging portion 27a, and one end thereof It has a first valve presser 28a which is fixed to the main bearing 18a and whose other end is bent in a direction away from the first discharge hole 22a and restricts the maximum opening of the first reed valve 26a.

  The second discharge valve device 23b has the same configuration as the first discharge valve device 23a described above, and one end is fixed to the auxiliary bearing 18b and the other head is formed with a valve head for opening and closing the second discharge hole 22b. A two-lead valve 26b, a concave second digging portion 27b formed in the sub-bearing 18b to accommodate the second reed valve 26b, and a second discharge hole 22b in the second digging portion 27b. It has an annular second valve seat and a second valve presser 28b that is fixed to the auxiliary bearing 18b and regulates the maximum opening of the second reed valve 26b.

  As shown in FIG. 2, the tip of the first cylinder 17a is brought into contact with the outer peripheral surface of the first roller 21a, and the volume and pressure are increased in the first cylinder chamber 19a as the first roller 21a rotates. A blade 31 is provided to partition the suction chamber 29 and the compression chamber 30 which are two changing spaces. The suction chamber 29 is connected to the other end of a suction passage 32 having one end connected to the suction pipe 8. Although not shown in the figure, the second cylinder 17b is also provided with a similar blade, and by this blade, the space inside the second cylinder chamber 19b changes in volume and pressure as the second roller 21b rotates. Are divided into a suction chamber and a compression chamber.

  As shown in FIGS. 2 and 3, the first reed valve 26a accommodated in the first digging portion 27a has a circular fixed support portion 33 formed at one end and a circular valve head at the other end. A portion 34 is formed. The fixed support portion 33 is a portion for riveting and fixing the first reed valve 26a to the main bearing 18a, and an insertion hole 35 through which a rivet described later is inserted is formed in the center portion of the fixed support portion 33. . The valve head 34 is a part that opens and closes the first discharge hole 22a, and the diameter of the valve head 34 is formed so as to cover the annular first valve seat 36a formed around the first discharge hole 22a. ing.

  The first digging portion 27a has an arcuate side wall 37 that is located around the first valve seat 36a and the center of the arc is concentric with the center of the first valve seat 36a, and includes the arcuate side wall 37. The entire side wall 38 of the first digging portion 27a is formed with a gap between it and the first reed valve 26a. Furthermore, the lower end portion of the arc-shaped side wall 37 is formed deeper than the valve seat surface that is the upper end surface of the first valve seat 36a.

  As shown in FIG. 4, the first reed valve 26 a and the first valve presser 28 a housed in the first digging portion 27 a include a rivet 39, an insertion hole 40 formed in the first valve presser 28 a, The first reed valve 26a is riveted to the main bearing 18a by being inserted through the insertion hole 35 of the first reed valve 26a and the insertion hole 41 formed in the main bearing 18a.

  The first reed valve 26a, which has been riveted, has an opening / closing operation starting position 42 that is a starting point for opening / closing when the first discharge hole 22a is opened / closed. A circular flat portion 43 centering on the center of the insertion hole 41 through which the rivet 39 is inserted is formed on the bottom surface of the first digging portion 27a, and the flat support portion of the first reed valve 26a is formed on the flat portion 43. The lower surface of 33 is in contact. The radius “R” of the flat portion 43 is formed larger than the dimension “L” from the center of the insertion hole 35 to the opening / closing operation starting position 42. The opening / closing operation starting position 42 is a point where the first valve presser 28a starts to bend in a direction away from the first discharge hole 22a.

  FIG. 5 is a plan view showing a state where the first reed valve 26 a and the first valve presser 28 a are positioned and fixed using the mounting jig 44. The mounting jig 44 is formed in a C shape having an arcuate outer peripheral side reference surface 45 on the outer peripheral side and an arcuate inner peripheral side reference surface 46 on the inner peripheral side. The diameter of the arc of the outer peripheral side reference surface 45 and the diameter of the arc of the arc-shaped side wall 37 of the first digging portion 27a are formed to be substantially the same size, and the diameter of the arc of the inner peripheral side reference surface 46 and the first reed valve The diameter of the arc of the valve head 34 of 26a is formed to be substantially the same size.

  When the riveted first reed valve 26a and the first valve presser 28a are viewed from the center line direction of the first discharge hole 22a, the contour of the first valve presser 36a is the valve head of the first reed valve 26a. The first reed valve 26a and the first valve presser 28a are formed in a dimension located inside the contour line 34. Further, the first valve presser 28a has a contour line of the first valve presser 28a when the first reed valve 26a and the first valve presser 28a that are riveted are viewed from the center line direction of the first discharge hole 22a. Is a part other than the valve head 34 and a portion facing the inner surface of the C-shaped opening of the mounting jig 44, and a pair of overhanging portions 47 located outside the contour line of the first reed valve 26 a Is formed. The distance between the pair of projecting portions 47 formed on the first valve presser 28 a and the distance between the inner surfaces of the C-shaped opening of the mounting jig 44 are formed to have substantially the same dimensions.

  2 to 5, only the first reed valve 26a, the first digging portion 27a, and the first valve presser 28a of the first discharge valve device 23a have been described. The reed valve 26b, the second digging portion 27b, and the second valve presser 28b are formed in the same configuration as the first reed valve 26a, the first digging portion 27a, and the first valve presser 28a.

  In such a configuration, in the compressor 4, when the electric motor unit 10 is energized, the rotation shaft 12 rotates around the center line, and the rotation of the rotation shaft 12 drives the compression mechanism unit 11. The gas refrigerant is compressed in the two compression elements 16a and 16b.

  When the pressure of the compressed gas refrigerant reaches the set pressure, the first and second reed valves 26a and 26b are opened, and the compressed gas refrigerant is discharged from the first and second discharge holes 22a and 22b. The gas refrigerant thus made flows into the first and second mufflers 24a and 24b. The gas refrigerant that has flowed into the first and second mufflers 24 a and 24 b flows out from the communication hole 25 into the sealed case 9.

  Here, the positioning of the first reed valve 26a in the first discharge valve device 23a is performed using the arc-shaped side wall 37 and the mounting jig 44 formed in the first digging portion 27a. Specifically, the mounting jig 44 is positioned by bringing the outer peripheral side reference surface 45 of the mounting jig 44 into contact with the arcuate side wall 37 of the first digging portion 27a. Subsequently, the valve head 34 of the first reed valve 26 a is brought into contact with the inner peripheral side reference surface 46 of the mounting jig 44 to position the first reed valve 26 a.

  Since the arc-shaped side wall 37 is formed concentrically with the center of the first valve seat 36a, the first valve seat 36a and the arc-shaped side wall 37 can be continuously formed using the same blade, The arc-shaped side wall 37 can be formed with high positional accuracy with respect to the first valve seat 36a.

  Then, the outer peripheral side reference surface 45 of the mounting jig 44 is brought into contact with the arcuate side wall 37, and the valve head 34 of the first reed valve 26a is brought into contact with the inner peripheral side reference surface 46 of the mounting jig 44. The positional accuracy between the first valve seat 36a and the valve head 34 of the first reed valve 26a can be increased, and the positional deviation between the first valve seat 36a and the valve head 34 can be suppressed. Accordingly, the displacement of the first valve seat 36a and the valve head 34 is suppressed, whereby the diameter of the valve head 34 can be reduced, and the diameter of the valve head 34 is reduced, thereby reducing the valve head. 34 can be reduced in weight. By reducing the weight of the valve head 34, the responsiveness when the first reed valve 26a opens and closes the first discharge hole 22a can be improved, and further, the first accompanying the opening and closing of the first discharge hole 22a. It is possible to reduce the impact force when the first reed valve 26a collides with the valve seat 36a to prevent the first reed valve 26a from cracking, and to improve the performance and reliability of the compressor 4. it can.

  Further, since the lower end portion of the arc-shaped side wall 37 is formed deeper than the valve seat surface of the first valve seat 36a, when the outer peripheral side reference surface 45 of the mounting jig 44 is brought into contact with the arc-shaped side wall 37, The inner peripheral side reference surface 46 of the mounting jig 44 can be positioned below the valve seat surface of the first valve seat 36a, and the valve head 34 is securely brought into contact with the inner peripheral side reference surface 46, The positional accuracy between the single valve seat 36a and the valve head 34 can be further increased.

  After positioning the first reed valve 26 a using the mounting jig 44, the first valve presser 28 a is positioned using the mounting jig 44. The first valve presser 28a is positioned by bringing the protruding portion 47 of the first valve presser 28a into contact with the inner surface of the C-shaped opening of the mounting jig 44, thereby positioning the first valve presser 28a. It can be performed with high accuracy.

  After positioning the first reed valve 26a and the first valve retainer 28a using the mounting jig 44, the insertion hole 40 of the first reed valve 28a, the insertion hole 35 of the first reed valve 26a, and the insertion hole of the main bearing 18a The first valve presser 28a and the first reed valve 26a are fixed to the main bearing 18a by inserting and tightening the rivet 39 to 41.

  When the fixed first reed valve 26a and the first valve presser 28a are viewed from the direction of the center line of the first discharge hole 22a, the contour line of the first valve presser 28a corresponds to the valve head 34 of the first reed valve 26a. Located inside the contour line. For this reason, when the attachment jig 44 is taken out above the first valve seat 36a, the first valve presser 28a does not interfere with the attachment jig 44, and the attachment jig 44 can be easily removed.

  Further, when the fixed first reed valve 26a and the first valve presser 28a are viewed from the center line direction of the first discharge hole 22a, the contour line of the projecting portion 47 of the first valve presser 28a is other than the valve head 34. Is located outside the contour of the first reed valve 26a. For this reason, the first valve presser 28a can be positioned with high accuracy by bringing the protruding portion 47 into contact with the inner surface of the C-shaped opening of the mounting jig 44.

  The flat portion 43 formed in the main bearing 18a has a radius “R” larger than the dimension “L” from the center of the insertion hole 35 to the opening / closing operation starting position 42 in the first reed valve 26a. For this reason, since the first reed valve 26a is securely fixed from both sides by the flat portion 43 and the first valve presser 28a at the opening / closing operation starting position 42, the opening / closing operation starting position by the bending of the first reed valve 26a or the like. 42 does not shift, a stable opening / closing operation of the first reed valve 26a is obtained, and the performance and reliability of the compressor 4 can be improved.

  As mentioned above, although embodiment of this invention was described, this embodiment is shown as an example and is not intending limiting the range of invention. This embodiment can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. This embodiment and its modifications are included in the scope of the present invention and the gist thereof, and are also included in the invention described in the claims and the equivalent scope thereof.

  DESCRIPTION OF SYMBOLS 1 ... Refrigeration cycle apparatus, 4 ... Compressor, 5 ... Condenser, 6 ... Expansion apparatus, 7 ... Evaporator, 11 ... Compression mechanism part, 18a ... Main bearing (discharge hole formation member), 18b ... Sub bearing (discharge hole) Forming member), 22a, 22b ... discharge hole, 23a, 23b ... discharge valve device, 26a, 26b ... reed valve, 27a, 27b ... digging portion, 28a, 28b ... valve retainer, 34 ... valve head, 36a ... valve Seat 37 ... Arc-shaped side wall 38 ... Side wall 44 ... Mounting jig

Claims (1)

A compression mechanism that compresses the working fluid; and a discharge valve device that opens and closes a discharge hole through which the compressed working fluid is discharged;
  The discharge valve device has one end fixed to a discharge hole forming member formed with the discharge hole and the other end formed with a valve head for opening and closing the discharge hole, and formed on the discharge hole forming member. And a method of manufacturing a compressor having an annular valve seat surrounding the periphery of the discharge hole,
  Forming a circular arc-shaped side wall in the discharge hole forming member in which the center of the arc is concentric with the center of the valve seat;
  Positioning the reed valve using a mounting jig positioned in contact with the arcuate side wall;
  Fixing the reed valve positioned by the mounting jig;
A method for manufacturing a compressor, comprising:

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