CN102312836A - Multi-cylinder rotary compressor, assembling method thereof and manufacturing device thereof - Google Patents

Abstract

The invention provides a multi-cylinder rotary compressor, which is not prone to refrigerant leakage from joints of separating plates which separate multiple compression chambers even when in the special running mode. The peripheries of dividing plates (130, 131) that constitute separating plates (114) for separating compression chambers are provided with cut portions. The separating plates are combined, and an arrow portion of a metal circular ring (135) is pressed to be deformed while the metal circular ring (135) is disposed on the outer peripheral surface of the separating plates. When the pressing operation is released, the circular arc space is formed between the inner peripheral surface of the metal circular ring (135) and the outer peripheral surface of the separating plates (114). A spring is disposed at a position where the metal circular ring (135) and the space are connected to absorb the interference so as to practically fix the dividing plates (130, 131).

Description

Multi-cylinder rotary compressor, its assembly method, and its manufacturing device

technical field

The present invention relates to a multi-cylinder rotary compressor having less leakage of a medium such as a refrigerant in a compression mechanism, a method for manufacturing the same, and a manufacturing device for the same.

Background technique

Conventionally, a compressor disclosed in Patent Document 1 is provided as a multi-cylinder rotary compressor. In this multi-cylinder rotary compressor, an electric element (motor) and a plurality of rotary compression elements (first and second rotary compression elements) are accommodated in an airtight container, and the electric element and the plurality of rotary compression elements are connected by a crankshaft having an eccentric portion. .

In addition, the spacer plate sandwiched between the adjacent rotary compression elements is composed of two divided plates, and the crankshaft is inserted into the through hole provided in the divided plate to surround the crankshaft and assembled. Then, the outer periphery of the spacer plate A ring-shaped heat-shrinkable part is embedded, and the two dividing plates are fastened.

According to the multi-cylinder rotary compressor of Patent Document 1, by fitting a ring-shaped heat-shrinkable member on the outer periphery of the partition plate assembled around the crankshaft, the sliding of the roller or the deformation of the cylinder during the operation of the compressor is prevented and suppressed. There is a slight gap between them.

Patent Document 1: Japanese Utility Model Publication No. 59-115891 (page 4, line 7 to page 4, line 15, Figure 4)

The annular heat-shrinkable member used in such a multi-cylinder rotary compressor is generally made of a resin material. However, there is a large temperature difference between the inside of the compressor during operation and when the operation is stopped, and there is a problem in the durability of heat-shrinkable parts in an environment filled with refrigerant or refrigerating machine oil.

In addition, the partition plate is a structure in which the upper and lower cylinders are clamped and fastened together by bolts. Under normal operating conditions, because the partition plate has friction between the upper and lower cylinders and the partition plate, the partition plate Applying the pressing force generated by the heat-shrinking member can suppress the occurrence of minute gaps, but for example, in the case of a special operation mode called vacuum operation in which the piping on the suction side is blocked, it is installed on the eccentric part. The roll is thermally expanded without being cooled.

As a result, the slidability between the rollers and the spacer plate deteriorates, the frictional force between the rollers and the spacer plate increases, and at the same time, the axial force of the bolts fixing the cylinder or the spacer plate concentrates on the sliding surface of the rollers and the spacer plate. As a result, the frictional force between the cylinder and the partition plate decreases, and there is a problem that the thermal contraction force of the resin becomes insufficient in strength. Of course, there is a method of securing durability and strength by using a heat-shrinkable member other than resin, but this is not an appropriate method because the cost increases.

Contents of the invention

The present invention is made in order to solve the above-mentioned problems, and its object is to obtain at low cost even for a special operation mode in which the frictional force between the cylinder and the partition plate is reduced even in a state such as a vacuum operation state. A multi-cylinder rotary compressor that does not create a gap between the partition plates.

The multi-cylinder rotary compressor of the present invention has a plurality of adjacent compression mechanisms, and the partition plate separating these compression mechanisms is divided into a plurality, and is characterized in that:

A plurality of spaces are formed between the inner peripheral surface of the metal ring fitted on the outer peripheral surface of the partition plate and the outer peripheral surface of the partition plate.

In addition, the method of manufacturing the multi-cylinder rotary compressor of the present invention is characterized in that

A spacer plate is combined between adjacent compression mechanisms in such a way that the crankshaft penetrates,

The metal ring fitted with the outer peripheral surface of the partition plate is pressed from the outer peripheral side of the metal ring to make it elastically deform and cover the outer peripheral surface of the partition plate,

By releasing the pressure from the outer peripheral side of the metal ring, a plurality of spaces are formed between the inner peripheral surface of the metal ring and the outer peripheral surface of the partition plate.

In addition, the manufacturing apparatus of the multi-cylinder rotary compressor of the present invention is characterized in that

There is a spacer plate assembly mechanism, the spacer plate assembly mechanism

While holding the metal ring fitted on the outer peripheral surface of the partition plate, press from the outer peripheral side of the metal ring to elastically deform it,

After covering the outer peripheral surface of the partition plate, release the pressing and fit with the partition plate,

A plurality of spaces are formed between the inner peripheral surface of the metal ring and the outer peripheral surface of the partition plate.

The multi-cylinder rotary compressor of the present invention is characterized in that

A plurality of spaces are formed between the inner peripheral surface of the metal ring fitted on the outer peripheral surface of the partition plate and the outer peripheral surface of the partition plate. Therefore, not only the normal operation of the compressor, but even if a special operation mode occurs, The partition plates constituting the partition plate do not deviate from each other, and the performance does not decrease at the time of restart, so that such a small and large-capacity multi-cylinder rotary compressor can be realized.

The manufacturing method of the multi-cylinder rotary compressor of the present invention is characterized in that

A spacer plate is combined between adjacent compression mechanisms in such a way that the crankshaft penetrates,

The metal ring fitted with the outer peripheral surface of the partition plate is pressed from the outer peripheral side of the metal ring, elastically deformed and covered on the outer peripheral surface of the partition plate,

By releasing the pressure from the outer peripheral side of the metal ring, a plurality of spaces are formed between the inner peripheral surface of the metal ring and the outer peripheral surface of the partition plate, so even if the processing accuracy of the metal ring or the partition plate constituting the partition plate is low , the partition plates can be easily and reliably joined to each other, and the leakage of the refrigerant from the partition plate is small, so that such a multi-cylinder rotary compressor can be provided.

In addition, the manufacturing apparatus of the multi-cylinder rotary compressor of the present invention is characterized in that

There is a spacer plate assembly mechanism, the spacer plate assembly mechanism

While holding the metal ring fitted on the outer peripheral surface of the partition plate, press from the outer peripheral side of the metal ring to elastically deform it,

After covering the outer peripheral surface of the partition plate, release the pressing and fit with the partition plate,

Since a plurality of spaces are formed between the inner peripheral surface of the metal ring and the outer peripheral surface of the partition plate, the metal ring can be easily fitted to the outer peripheral surface of the partition plate composed of a plurality of divided plates.

Description of drawings

Fig. 1 is a longitudinal sectional view of Embodiment 1 of the multi-cylinder rotary compressor of the present invention.

Fig. 2 is a cross-sectional view taken along line A-A of Fig. 1 .

3 is a perspective view showing a partition plate constituting a partition plate that partitions a first compression chamber and a second compression chamber in Embodiment 1 of the multi-cylinder rotary compressor of the present invention.

FIG. 4 is a plan view of a partition plate to which a metal ring is attached according to Embodiment 1. FIG.

5 is a diagram showing details of a bolt fastening structure of a compression device according to Embodiment 1 of the multi-cylinder rotary compressor of the present invention.

FIG. 6 is a plan view showing another example of the partition plate to which the metal ring is attached according to Embodiment 1. FIG.

Fig. 7 is a side view showing the compression device being assembled according to Embodiment 1 of the present invention and the state of use of the assembly device thereof.

FIG. 8 is a diagram showing an operation sequence of the assembly device 200 according to Embodiment 1 of the present invention.

Explanation of reference signs

100 rotary compressor; 101 shell; 101a upper shell; 101b intermediate shell; 101c lower shell; 102 motor; 102a stator; 102b rotor; 103 compression device; 104 glass terminal; 105 discharge pipe; Suction muffler; 108 crankshaft; 109 first frame; 109a first bearing; 110a, 110b cylinder; 111a, 111b spring; 112a, 112b blade; 113a, 113b roller; 120 rotor fitting part; 121 bearing insertion part; 122a; 122b eccentric part; 123 middle part; 125 bearing insertion part; 126a compression chamber; 126b compression chamber; 128 low pressure part; 129 high pressure part; 130a upper end surface; 130b lower end surface; 130c dividing surface; 130d outer peripheral surface; 130e groove; 130f hole; 131a upper end surface; 131b lower end surface; 131c dividing surface; 131d outer peripheral surface; ; 135 metal ring; 136 outlet; 200 assembly device; 201 base; 202 workpiece positioning components;

Detailed ways

Implementation mode 1.

Hereinafter, Embodiment 1 of the multi-cylinder rotary compressor of the present invention will be described with reference to the drawings.

FIG. 1 is a longitudinal sectional view of a multi-cylinder rotary compressor 100 (hereinafter, referred to as a rotary compressor 100 ).

FIG. 2 is a cross-sectional view of the rotary compressor 100 of FIG. 1 taken along line A-A.

In this embodiment, a rotary compressor for a refrigerating and air-conditioning machine having two compression chambers will be described as an example.

The rotary compressor 100 has a casing 101 as an airtight container, a motor 102 as a driving source provided inside the casing 101 , and a compression device 103 composed of two compression mechanisms.

The case 101 has an upper case 101a, an intermediate case 101b, and a lower case 101c.

The upper casing 101a is provided with a glass terminal 104 for supplying electric power to the motor 102 from the outside, and a discharge pipe 105 for discharging the compressed refrigerant to the outside of the compressor.

The motor 102 and the compression device 103 are fixed in the intermediate case 101b, and the suction pipe 106 which introduces the refrigerant to the compression device 103 is fixed so as to pass through the wall surface of the intermediate case 101b.

The suction pipe 106 is connected to the suction muffler 107 , and the gas-liquid separation of the refrigerant and the removal of impurities in the refrigerant are performed in the suction muffler 107 .

The motor 102 has a stator 102 a and a rotor 102 b mounted on a crankshaft 108 . The rotational torque generated by the motor 102 is transmitted to the compression device 103 through the crankshaft 108 .

The compression device 103 has a crankshaft 108 also serving as the rotation shaft of the motor 102, a first housing 109 having a first bearing 109a formed on its inner periphery, a first cylinder 110a, a first spring 111a, a first vane 112a, a first The roller 113a, the partition plate 114, the second cylinder 110b, the second frame body 116 with the second bearing 116a formed on the inner peripheral part, the second spring 111b, the second vane 112b, and the second roller 113b are short bolts 133 and Long bolts 134 are fastened from above and below.

The crankshaft 108 has a rotor fitting portion 120 , a first bearing insertion portion 121 , a first eccentric portion 122 a , an intermediate portion 123 , a second eccentric portion 122 b , and a second bearing insertion portion 125 . The eccentric phases of the first eccentric part 122a and the second eccentric part 122b are 180 degrees different, and the first roller 113a and the second roller 113b are rotatably attached to the respective outer peripheral surfaces.

A space surrounded by the lower end surface of the first frame body 109, the inner peripheral surface of the first cylinder 110a, the upper end surface of the partition plate 114, and the outer peripheral surface of the first roller 113a serves as a first compression chamber 126a.

Similarly, the space surrounded by the lower end surface of the partition plate 114, the inner peripheral surface of the second cylinder 110b, the upper end surface of the second frame body 116, and the outer peripheral surface of the second roller 113b serves as the second compression chamber 126b.

As shown in Figure 2, radially expandable first springs 111a and second springs 111b are installed on the first cylinder 110a and the second cylinder 110b, and the pressing force of each spring makes the first blade 112a and the second blade 112b press. to the outer peripheral surfaces of the first roller 113a and the second roller 113b. The first vane 112 a and the second vane 112 b have a function of dividing the first compression chamber 126 a and the second compression chamber 126 b into a low-pressure portion 128 and a high-pressure portion 129 . In addition, in this example, the phases of the first blade 112a and the second blade 112b are equal.

Fig. 3 is a perspective view showing two partition plates 130, 131 constituting the partition plate 114 that partitions the first compression chamber 126a and the second compression chamber 126b.

As shown in FIG. 3 , the partition plate 114 is composed of a partition plate 130 and a partition plate 131 . The partition plate 130 has an upper end surface 130a, a lower end surface 130b, a partition surface 130c, and an outer peripheral surface 130d. A groove 130e for inserting the crankshaft 108 is formed in the split surface 130c. There are three cutouts on the outer peripheral surface 130d.

The second dividing plate 131 has an upper end surface 131a, a lower end surface 131b, a dividing surface 131c, and an outer peripheral surface 131d. A groove 131e for inserting the crankshaft 108 is formed in the split surface 131c. There are three cutouts on the outer peripheral surface 131d. The partition plate 130 and the partition plate 131 are provided with a plurality of (three each in this example) through holes 130 f and 131 f for fastening bolts for assembling the compression device 103 .

FIG. 4 is a plan view showing a state where a metal ring 135 is attached to the partition plate 114 that partitions the first compression chamber 126a and the second compression chamber 126b.

The split plate 130 and the split plate 131 are combined in a state where the split surface 130c and the split surface 131c are in contact, and one metal ring 135 is fitted to the outer peripheral surfaces 130d, 131d.

By setting the interference between the partition plate 114 and the metal ring 135, a pressing force corresponding to the interference acts on the partition surface of the partition plate 114 to prevent the partition plate 130 and the partition plate 131 from shifting at the junction.

In order to explain the "pressing force" described above, a method of removing the metal ring 135 in FIG. 4 will be described.

Press the metal ring 135 from the directions of the arrows in the four places in the figure. The inner side of the metal ring 135 of the pressing portion forms an arc-shaped space. The length in the circumferential direction of the inner peripheral surface of the metal ring 135 in contact with this space is longer than the length of the facing cutout portion. Therefore, when the four arrows are pressed, the portion of the metal ring 135 in contact with the partition plate 114 bulges radially outward of the metal ring 135 . Thus, a gap is formed between the outer peripheral surface of the partition plate 114 and the inner peripheral surface of the metal ring 135, and the metal ring 135 can be detached.

The installation of the metal ring 135 is carried out in the opposite order to the above. When the pressure on the metal ring 135 is released, the part of the inner peripheral surface of the metal ring 135 facing the above-mentioned space becomes a spring and absorbs the metal ring 135. the amount of interference.

The groove 130e of the split plate 130 and the groove 131e of the split plate 131 face each other to form a crankshaft insertion hole 132 .

The diameter of the crankshaft insertion hole 132 is slightly larger than the diameter of the middle portion 123 of the crankshaft 108, and smaller than the diameters of the first eccentric portion 122a and the second eccentric portion 122b.

With such a structure, even if the eccentricity of the eccentric portions 122a, 122b of the crankshaft 108 is large, the diameter of the crankshaft insertion hole 132 can be reduced, and refrigerant leakage from the crankshaft insertion hole 132 can be reduced.

The rotary compressor 100 of this embodiment drives the motor 102 provided inside the housing 101 by passing electricity through the glass terminal 104, and rotates the crankshaft 108 having the first eccentric portion 122a and the second eccentric portion 122b.

In addition, the refrigerant is sucked into the first compression chamber 126a and the second compression chamber 126b through the suction muffler 107 and the suction pipe 106, is compressed with the rotation of the crankshaft 108, and is discharged from the discharge port 136 to the casing when a certain pressure is reached. 101, and then discharged to the outside of the rotary compressor 100 through the discharge pipe 105.

FIG. 5 shows details of the bolt fastening structure of the compression device 103 . The first frame body 109 and the first cylinder 110a, the second frame body 116 and the second cylinder 110b are respectively fixed by three short bolts 133 . In addition, the first frame body 109 and the second cylinder 110b, the second frame body 116 and the first cylinder 110a are respectively fixed by three long bolts 134, and the spacer plate 114 is clamped by the first cylinder 110a and the second cylinder 110b. States are collectively fastened. For this reason, an axial fastening force and a horizontal frictional force act on the partition plate 114 .

The rollers 113a and 113b slide on the surface of the partition plate 114 when the rotary compressor 100 is in operation. At this time, the friction force between the air cylinders 110a, 110b and the partition plate 114 and the pressing force generated by the metal ring 135 are relative to the force (staggered force) F1 to be shifted between the partition plate 130 and the partition plate 131 constituting the partition plate 114 . The sum becomes staggered endurance F2.

By making the misalignment resistance F2 larger than the misalignment force F1, the partition plates 114 do not misalign. Generally, it is designed so that the misalignment endurance F2 during normal operation is sufficiently larger than the misalignment force F1.

However, in the case of a special operation mode called vacuum operation, since the sliding property between the rollers 113a, 113b and the spacer plate 114 becomes poor, the frictional force between the rollers 113a, 113b and the spacer plate 114 becomes large, At the same time, the frictional force between the cylinders 110a, 110b and the partition plate 114 is reduced, so it is difficult to make the misalignment resistance force F2 larger than the misalignment force F1.

Hereinafter, the compression device 103 when the vacuum operation occurs will be described in detail.

The vacuum operation is a special operation mode that occurs when the rotary compressor 100 is operated with the upstream side of the refrigerant flow path of the compression device 103 blocked for some reason.

Since the refrigerant is compressed in a state where no refrigerant is sucked in, the interior of the compression device 103 is partially close to vacuum. For this reason, the sliding parts of the rollers 113a, 113b and the blades 112a, 112b are not cooled by the refrigerant, and the rollers 113a, 113b are heated and thermally expanded, and the partition plate 114 and the frame body 109, 116 are pressed toward the axial direction of the crankshaft 108. , the axial force of the long bolts is concentrated on the sliding surfaces of the rollers 113a, 113b and the spacer plate 114, and the frictional force between the cylinders 110a, 110b and the spacer plate 114 is reduced.

By making the rollers 113a, 113b and the air cylinders 110a, 110b slightly different in thickness and providing gaps, it is possible to reduce the reduction of the frictional force during vacuum operation.

However, when the gap becomes larger, the gap between the rollers 113a, 113b and the air cylinders 110a, 110b becomes larger during normal operation, and there is a trade-off relationship in which compression performance is lowered.

When such a special operation mode occurs, since the electric current flowing through the motor 102 increases, an overcurrent may be detected to stop the operation of the rotary compressor 100 .

If the partition plate 114 does not deviate during the period when the operation is stopped, the blockage of the flow path is released and the operation is restarted. In this case, the performance of the compression device 103 is not degraded.

However, if the joints of the partition plates 114 are shifted until the operation stops, a gap will be formed between the partition plate 130 and the partition plate 131 . In this case, even if the rotary compressor 100 is restarted by releasing the clogging of the flow path, the compression performance will decrease.

By fitting the metal ring 135 to the outer periphery of the partition plate 114, the misalignment resistance is improved. Therefore, it is important to control the amount of interference for the fitting of the metal ring 135 . When the dimensional variation of the outer circumference of the spacer plate 114 or the inner circumference of the metal ring 135 is large, the variation of the interference amount also becomes large, making it difficult to attach the metal ring 135 .

Therefore, in general, machining such as cutting is necessary in order to maintain the dimensional accuracy between parts.

However, in Embodiment 1 of the present invention, by providing notches on the outer periphery of the partition plate 114, machining of the outer peripheral surface of the partition plate 114 or the inner peripheral surface of the metal ring 135 is unnecessary, and cost can be reduced.

Partial fit between the spacer plate 114 and the metal ring 135 is formed by providing a cutout on the outer periphery of the spacer plate 114, and the interference can be adjusted by deforming the portion facing the cutout portion of the metal ring 135 during installation. Therefore, even when the variation of the metal ring itself is large, it can be easily assembled. In mass production, the spacer plate 114 or the metal ring 135 can be manufactured even by using an inexpensive but poor dimensional accuracy processing method such as press processing.

In addition, the metal ring 135 can be manufactured by rolling and welding a plate material into an annular shape, and expanding the inner circumference thereof, which can be manufactured at a lower cost than when manufacturing by cutting machine.

Needless to say, during the normal operation of the compressor, even if a special operation mode occurs, the partition plates 130, 131 constituting the partition plate 114 will not be shifted from each other, and the compression performance will not be lowered when restarting. Small size and large capacity can be realized. Multi-cylinder rotary compressors.

In addition, the case where there are three cutouts on the outer circumference of the partition plates 130, 131 has been described before, but the number of cutouts is not limited to three places, for example, only the upper and lower parts in FIG. Figure 6 shows five or more.

Next, a method of manufacturing the compression device 103 of the rotary compressor 100 using an assembly device will be described with reference to the drawings.

FIG. 7 is a diagram showing a state of use of the compression device 103 being assembled and its assembly device 200 .

The assembly device 200 is mainly composed of a base 201 , a workpiece positioning member 202 , a partition plate pressing mechanism 203 (hereinafter referred to as the pressing mechanism 203 ), and a holding and inserting mechanism 204 . The compressing device 103 is placed on the base 201 in a state reversed up and down. The workpiece positioning member 202 positioned on the base 201 is used to position the central axis of the crankshaft 108 by abutting against the side surface of the first cylinder.

The pressing mechanism 203 presses the partition plate 114 toward the first cylinder 110a from above, and fixes the partition plate 130 and the partition plate 131 constituting the partition plate 114 so that these components do not shift during assembly of the compression device 103 .

The grasping and inserting mechanism 204 has a mechanism for grasping and inserting various components, particularly a mechanism for grasping and slightly deforming the outer circumference of the metal ring 135 and a mechanism for inserting the grasped metal ring 135 into the outer circumference of the partition plate 114 .

FIG. 8 is a diagram showing an operation sequence of the assembly device 200 .

The operation of the assembly device 200 will be described in accordance with the flowchart.

First, in Step 1, the first air cylinder 110a and the first frame body 109 fixed by the bolts 133 in the previous step are placed on the base in a vertically inverted state with respect to FIGS. 201 on. In step 2, the first cylinder 110a is positioned by the workpiece positioning member 202 on the base 201 so that the central axis of the first bearing 109a is at a specified position.

Next, in step 3, the first blade 112a and the first roller 113a are inserted into the first cylinder 110a.

Next, in step 4, the crankshaft 108 is inserted into the first bearing 109a of the first frame 109, and the first eccentric portion 122a of the crankshaft 108 is inserted into the first roller 113a in the first cylinder 110a.

Next, in Step 5, the partition plate 130 and the partition plate 131 are placed on the first air cylinder 110a. At this time, the phases and positions of the dividing plate 130 and the dividing plate 131 are determined.

Next, in Step 6, a load is applied to the partition plate 114 from above by the pressing mechanism 203, and it is pressed against the first air cylinder 110a.

Next, in step 7, the metal ring 135 is grasped by the grasping insertion mechanism 204 . The grip insertion mechanism 204 grips the outer periphery of the metal ring 135 from four directions corresponding to the portion facing the notch of the partition plate 114 .

Next, in step 8, the holding force of the holding and inserting mechanism 204 is increased and adjusted, so that the metal ring 135 is elastically deformed along the shape of the cutout portion of the partition plate 114 .

Specifically, the gripped portion is recessed, and the portion fitted with the partition plate 114 is bulged.

Next, in Step 9 , the holding and inserting mechanism 204 is lowered to fit the metal ring 135 to the outer periphery of the partition plate 114 . In step 8, since the metal ring 135 is deformed so that the portion fitted with the spacer plate 114 bulges out, even if the metal ring 135 is provided with the outer circumference for fitting the spacer plate 114 and the metal ring 135 The interference of the inner circumference of the metal ring 135 can also be smoothly inserted into the outer circumference of the spacer plate 114 .

In addition, since the partition plate 114 is pushed toward the first cylinder by the pressing mechanism 203 in step 6, the partition plate 130 and the partition plate 131 will not be misaligned due to the insertion of the metal ring 135 .

Next, in step 10, the gripping of the metal ring 135 by the gripping insertion mechanism 204 is released, and the gripping insertion mechanism 204 is raised.

Thereafter, in step 11 , the pressing mechanism 203 is retracted upward, and in step 12 , the second roller 113 b is inserted into the eccentric portion 122 b of the crankshaft 108 .

In step 13 , the second cylinder 110 b on which the second vane 112 b is placed is placed on the partition plate 114 , and the second bearing 116 a provided on the second frame 116 is inserted into the crankshaft 108 .

In step 14, the second cylinder 110b is positioned such that the centers of the first bearing and the second bearing are coaxial.

Finally, in step 15, the first frame body 109 and the second cylinder 110b, and the second frame body 116 and the second cylinder 110b are respectively fixed by bolts 134.

In this manner, the metal ring 135 can be easily fitted to the partition plate 114 composed of the first split plate 130 and the second split plate 131 by the method of manufacturing the compression device 103 using the assembly device 200 . In particular, by providing a notch on the outer periphery of the partition plate 114, the position of the metal ring 135 facing the notch is slightly deformed, and the part fitted with the partition plate 114 is elastically deformed to bulge out. Even if the dimensional accuracy of the inner circumference of the ring 135 deteriorates somewhat, it can be easily manufactured with inexpensive equipment without press-fitting or thermal fitting.

As described above, according to Embodiment 1 of the present invention, it is possible to inexpensively provide a compact, high-capacity compressor with less leakage of refrigerant at the joint of the partition plate 114 that separates the cylinders of the compression device 103 of the rotary compressor 100 . Cylinder rotary compressor.

Claims (8)

1. A multi-cylinder rotary compressor, the multi-cylinder rotary compressor has a plurality of adjacent compression mechanisms, and a partition plate separating these compression mechanisms is divided into a plurality, characterized in that, A plurality of spaces are formed between the inner peripheral surface of the metal ring fitted on the outer peripheral surface of the partition plate and the outer peripheral surface of the partition plate. 2. The multi-cylinder rotary compressor according to claim 1, wherein the circumferential length of the inner peripheral surface of the metal ring in contact with each of the spaces is larger than that of the inner peripheral surface of the metal ring in contact with the spaces. The circumferential length of the outer peripheral surface of the partition plate is large. 3. The multi-cylinder rotary compressor according to claim 1 or 2, wherein the metal ring is punched out under pressure. 4. The multi-cylinder rotary compressor according to claim 1 or 2, wherein the metal ring is formed by bending a metal plate into a ring shape and then welding and fixing it. 5. A method of manufacturing a multi-cylinder rotary compressor, the multi-cylinder rotary compressor having a plurality of adjoining compression mechanisms, and a partition plate separating these compression mechanisms is divided into a plurality, characterized in that, combining the spacer plates between adjacent compression mechanisms in such a manner that the crankshafts pass through, Pressing the metal ring fitted on the outer peripheral surface of the partition plate from the outer peripheral side of the metal ring, elastically deforming it to cover the outer peripheral surface of the partition plate, By releasing the pressure from the outer peripheral side of the metal ring, a plurality of spaces are formed between the inner peripheral surface of the metal ring and the outer peripheral surface of the partition plate. 6. The method of manufacturing a multi-cylinder rotary compressor according to claim 5, wherein the circumferential length ratio of the inner peripheral surface of the metal ring that is in contact with each of the spaces is in contact with the space. The circumferential length of the outer peripheral surface of the partition plate is large. 7. A manufacturing device of a multi-cylinder rotary compressor, the multi-cylinder rotary compressor has a plurality of adjacent compression mechanisms, and a partition plate separating these compression mechanisms is divided into a plurality, characterized in that it has Partition plate assembly mechanism, the spacer plate assembly mechanism While holding the metal ring fitted on the outer peripheral surface of the partition plate, pressing from the outer peripheral side of the metal ring to elastically deform it, After the metal ring is covered on the outer peripheral surface of the partition plate, the pressing is released to fit the metal ring with the partition plate, A plurality of spaces are formed between the inner peripheral surface of the metal ring and the outer peripheral surface of the partition plate. 8. The manufacturing apparatus of a multi-cylinder rotary compressor according to claim 7, wherein the circumferential length ratio of the inner peripheral surface of the metal ring that is in contact with each of the spaces is in contact with the space. The circumferential length of the outer peripheral surface of the partition plate is large.

Images