JP5729343B2 - Tandem vane compressor - Google Patents

Description

  The present invention relates to a tandem vane compressor.

  Patent Documents 1 to 5 disclose conventional tandem vane compressors. In these tandem type vane compressors, a suction chamber, a discharge chamber, and a compression chamber are formed in a housing, and a drive shaft is rotatably supported. Also, in the housing, the rotation of the drive shaft causes the compression chamber to draw a low-pressure refrigerant gas from the suction chamber, the compression stroke to compress the refrigerant gas in the compression chamber, and the high-pressure refrigerant gas in the compression chamber. A plurality of compression mechanisms for performing a discharge stroke for discharging into the discharge chamber are tandemly coupled.

  Each compression mechanism includes a first compression mechanism and a second compression mechanism. The first compression mechanism has a first cylinder chamber formed in the housing, and a first rotor that is rotatably provided in the first cylinder chamber by a drive shaft. A plurality of first vane grooves are formed in the radial direction in the first rotor. In addition, the first compression mechanism is provided so as to be able to appear and retract in each first vane groove, and forms a first compression chamber that is a compression chamber positioned forward together with the inner surface of the first cylinder chamber and the outer surface of the first rotor. Has vanes.

  Similarly to the first compression mechanism, the second compression mechanism also includes a second cylinder chamber formed in the housing and a second rotor that is rotatably provided in the second cylinder chamber by a drive shaft. The second rotor is also formed with a plurality of second vane grooves in the radial direction. The second compression mechanism is also provided so as to be able to protrude and retract in each second vane groove, and forms a second compression chamber which is a compression chamber located rearward together with the inner surface of the second cylinder chamber and the outer surface of the second rotor. Has vanes.

  When these tandem vane compressors are used in an air conditioner such as a vehicle, the drive shaft is rotationally driven through, for example, an electromagnetic clutch. As a result, the first and second compression mechanisms operate. That is, the first and second rotors rotate, and the first and second compression chambers perform a suction stroke, a compression stroke, and a discharge stroke. For this reason, the refrigerant gas is sucked into the first and second compression chambers from the suction chamber, compressed in the first and second compression chambers, and discharged into the discharge chamber. The high-pressure refrigerant gas discharged into the discharge chamber is supplied to the refrigeration circuit of the air conditioner.

  Thus, in these tandem vane compressors, the first and second compression mechanisms perform the suction stroke, the compression stroke, and the discharge stroke, respectively, so that the discharge capacity per one rotation of the drive shaft can be increased.

  In addition, in order to increase the discharge capacity, simply increasing the axial length of a single cylinder type vane compressor having a single cylinder chamber and a rotor makes it easy for each vane to tilt forward and backward. It is likely that refrigerant gas leaks and the slidability of each vane deteriorates. In this respect, in these tandem vane type compressors, the first and second vanes are not easily tilted forward and backward, and there is little leakage of refrigerant gas from the first and second compression chambers. It seems to have excellent mobility. For this reason, it seems that these tandem type vane type compressors can exhibit excellent mechanical efficiency.

  Furthermore, since these tandem vane compressors can have the same barrel diameter as that of the single cylinder vane compressor, they can also exhibit excellent mountability.

JP 59-90086 JP 58-144687 A Japanese Utility Model Publication No. 3-102086 Japanese Utility Model Publication No. 60-39793 Japanese Utility Model Publication No. 3-118294

  However, the conventional tandem vane type compressor has a first back pressure chamber formed between a bottom surface of each first vane and each first vane groove, a bottom surface of each second vane, and each second vane. There is no structure in which high-pressure lubricating oil can be supplied together with the second back pressure chamber formed between the grooves. Therefore, in these tandem type vane compressors, the first and second vanes are not pressed against the inner surfaces of the first and second cylinder chambers while the first and second compression mechanisms perform the compression stroke and the discharge stroke, respectively. There is concern about leakage of refrigerant gas from the first and second compression chambers. For this reason, it is difficult for these tandem vane compressors to reliably exhibit high mechanical efficiency.

  The present invention has been made in view of the above-described conventional situation, and can increase the discharge capacity per rotation of the drive shaft and can more reliably exhibit excellent mechanical efficiency and mountability. Providing a vane type compressor is a problem to be solved.

The tandem vane type compressor of the present invention has a suction chamber, a discharge chamber, and a compression chamber formed in a housing, and a drive shaft is rotatably supported in the housing. A suction stroke in which the compression chamber sucks low-pressure refrigerant gas from the suction chamber; a compression stroke in which the refrigerant gas is compressed in the compression chamber; and a discharge in which the high-pressure refrigerant gas in the compression chamber is discharged into the discharge chamber. A number of compression mechanisms that perform the process are combined in tandem,
Each of the compression mechanisms includes a first cylinder chamber formed in the housing, a first cylinder chamber rotatably provided by the drive shaft, and a plurality of first vane grooves formed in a radial direction. A rotor and a first vane that is provided in the first vane groove so as to be able to appear and retract, and forms a first compression chamber that is the compression chamber positioned forward together with the inner surface of the first cylinder chamber and the outer surface of the first rotor. A first compression mechanism having
A second cylinder chamber formed in the housing; a second rotor provided rotatably in the second cylinder chamber by the drive shaft; and a plurality of second vane grooves formed radially; 2nd compression which has 2nd vane which is provided in the 2 vane groove so that it can be projected and retracted, and forms the 2nd compression chamber which is the compression chamber located behind with the inner surface of the 2nd cylinder room, and the outer surface of the 2nd rotor In a tandem vane compressor equipped with a mechanism,
A space between the bottom surface of each first vane and each first vane groove is a first back pressure chamber,
A space between the bottom surface of each second vane and each second vane groove is a second back pressure chamber,
The housing forms a shell, a shell in which a suction port and a discharge port connected to the outside are formed, and a first side plate that is housed in the shell and forms the suction chamber that communicates with the suction port together with the shell. And a second side plate that is housed in the shell and partitions the first compression mechanism and the second compression mechanism, and the discharge chamber that is housed in the shell and communicates with the discharge port together with the shell. A third side plate to be formed, a first cylinder block sandwiched between the first side plate and the second side plate and housed in the shell and forming the first cylinder chamber, and the second side plate And a second cylinder block sandwiched between the third side plate and housed in the shell and forming the second cylinder chamber,
In the discharge chamber, the lubricating oil is separated from the refrigerant gas discharged into the discharge chamber after being sucked into the suction chamber from the suction port and compressed by the first compression mechanism and the second compression mechanism, A separator is provided that stores the lubricating oil in the discharge chamber and discharges the refrigerant gas from which the lubricating oil has been separated from the discharge port,
A common flow path communicating with the discharge chamber is formed on the drive shaft,
The second side plate is formed with a first supply channel that communicates the common channel with each of the first back pressure chambers,
The third side plate is formed with a second supply channel that communicates the common channel and each of the second back pressure chambers .
The first side plate, the first cylinder block, the second side plate, the second cylinder block, and the third side plate are fixed in a state of being accommodated in the shell,
The first side plate, the second side plate, and the third side plate are each provided with a shaft hole that rotatably holds the drive shaft,
The common flow path has a hole extending in a radial direction toward the shaft hole in the third side plate .

In the tandem vane compressor of the present invention, the first back pressure chamber formed between the bottom surface of each first vane and each first vane groove, the bottom surface of each second vane, and each second vane groove The high pressure lubricating oil can be supplied to the second back pressure chamber formed between the two. In other words, each first back pressure chamber, a common channel formed in the drive shaft, a first through a supply passage formed in the second side plates, the high pressure of the lubricating oil in the discharge chamber is supplied The In addition, each second back pressure chamber, a common channel formed in the drive shaft, via a second supply flow path formed in the third side plates, the high pressure of the lubricating oil in the discharge chamber is supplied The

  For this reason, in the tandem type vane compressor, the first and second vanes are suitably pressed against the inner surfaces of the first and second cylinder chambers while the first and second compression mechanisms perform the compression stroke and the discharge stroke, respectively. There is little leakage of refrigerant gas from the first and second compression chambers. Therefore, these tandem vane compressors can reliably exhibit high mechanical efficiency. Further, in this tandem type vane type compressor, it is not necessary to separately communicate each first back pressure chamber and each second back pressure chamber with the discharge chamber, so that the manufacturing cost can be reduced.

  Therefore, in the tandem vane compressor, the discharge capacity per one rotation of the drive shaft can be increased, and excellent mechanical efficiency and mountability can be more reliably exhibited.

  In the tandem vane compressor of the present invention, by forming the common flow path, the arrangement of the passage for supplying the back pressure is simplified, and the manufacturing cost can be reduced.

  In the tandem vane compressor of the present invention, the compression mechanism may include another compression mechanism in addition to the first compression mechanism and the second compression mechanism. Further, the shell can be composed of a front housing and a rear housing. A cylindrical center housing may be provided between the front housing and the rear housing.

The tandem vane type compressor of the present invention has a suction chamber, a discharge chamber, and a compression chamber formed in a housing, and a drive shaft is rotatably supported in the housing. A suction stroke in which the compression chamber sucks low-pressure refrigerant gas from the suction chamber; a compression stroke in which the refrigerant gas is compressed in the compression chamber; and a discharge in which the high-pressure refrigerant gas in the compression chamber is discharged into the discharge chamber. A number of compression mechanisms that perform the process are combined in tandem,
  Each of the compression mechanisms includes a first cylinder chamber formed in the housing, a first cylinder chamber rotatably provided by the drive shaft, and a plurality of first vane grooves formed in a radial direction. A rotor and a first vane that is provided in the first vane groove so as to be able to appear and retract, and forms a first compression chamber that is the compression chamber positioned forward together with the inner surface of the first cylinder chamber and the outer surface of the first rotor. A first compression mechanism having
  A second cylinder chamber formed in the housing; a second rotor provided rotatably in the second cylinder chamber by the drive shaft; and a plurality of second vane grooves formed radially; 2nd compression which has 2nd vane which is provided in the 2 vane groove so that it can be projected and retracted, and forms the 2nd compression chamber which is the compression chamber located behind with the inner surface of the 2nd cylinder room, and the outer surface of the 2nd rotor In a tandem vane compressor equipped with a mechanism,
  A space between the bottom surface of each first vane and each first vane groove is a first back pressure chamber,
  A space between the bottom surface of each second vane and each second vane groove is a second back pressure chamber,
  The housing forms a shell, a shell in which a suction port and a discharge port connected to the outside are formed, and a first side plate that is housed in the shell and forms the suction chamber that communicates with the suction port together with the shell. And a second side plate that is housed in the shell and partitions the first compression mechanism and the second compression mechanism, and the discharge chamber that is housed in the shell and communicates with the discharge port together with the shell. A third side plate to be formed, a first cylinder block sandwiched between the first side plate and the second side plate and housed in the shell and forming the first cylinder chamber, and the second side plate And a second cylinder block sandwiched between the third side plate and housed in the shell and forming the second cylinder chamber,
  In the discharge chamber, the lubricating oil is separated from the refrigerant gas discharged into the discharge chamber after being sucked into the suction chamber from the suction port and compressed by the first compression mechanism and the second compression mechanism, A separator is provided that stores the lubricating oil in the discharge chamber and discharges the refrigerant gas from which the lubricating oil has been separated from the discharge port,
  A common flow path communicating with the discharge chamber is formed on the drive shaft,
  The first side plate is formed with a first supply channel that communicates the common channel and each of the first back pressure chambers,
  The third side plate is formed with a second supply channel that communicates the common channel and each of the second back pressure chambers.
  The first side plate, the first cylinder block, the second side plate, the second cylinder block, and the third side plate are fixed in a state of being accommodated in the shell,
  The first side plate, the second side plate, and the third side plate are each provided with a shaft hole that rotatably holds the drive shaft,
  The common flow path has a hole extending in a radial direction toward the shaft hole in the third side plate.
  In the tandem vane compressor of the present invention, a suction chamber, a discharge chamber, and a compression chamber are formed in a housing, and a drive shaft is rotatably supported, and the rotation of the drive shaft is accommodated in the housing. Accordingly, the compression chamber sucks a low-pressure refrigerant gas from the suction chamber, the compression stroke compresses the refrigerant gas in the compression chamber, and discharges the high-pressure refrigerant gas in the compression chamber to the discharge chamber. A plurality of compression mechanisms that perform the discharge stroke are tandemly coupled,
  Each of the compression mechanisms includes a first cylinder chamber formed in the housing, a first cylinder chamber rotatably provided by the drive shaft, and a plurality of first vane grooves formed in a radial direction. A rotor and a first vane that is provided in the first vane groove so as to be able to appear and retract, and forms a first compression chamber that is the compression chamber positioned forward together with the inner surface of the first cylinder chamber and the outer surface of the first rotor. A first compression mechanism having
  A second cylinder chamber formed in the housing; a second rotor provided rotatably in the second cylinder chamber by the drive shaft; and a plurality of second vane grooves formed radially; 2nd compression which has 2nd vane which is provided in the 2 vane groove so that it can be projected and retracted, and forms the 2nd compression chamber which is the compression chamber located behind with the inner surface of the 2nd cylinder room, and the outer surface of the 2nd rotor In a tandem vane compressor equipped with a mechanism,
  A space between the bottom surface of each first vane and each first vane groove is a first back pressure chamber,
  A space between the bottom surface of each second vane and each second vane groove is a second back pressure chamber,
  The housing forms a shell, a shell in which a suction port and a discharge port connected to the outside are formed, and a first side plate that is housed in the shell and forms the suction chamber that communicates with the suction port together with the shell. And a second side plate that is housed in the shell and partitions the first compression mechanism and the second compression mechanism, and the discharge chamber that is housed in the shell and communicates with the discharge port together with the shell. A third side plate to be formed, a first cylinder block sandwiched between the first side plate and the second side plate and housed in the shell and forming the first cylinder chamber, and the second side plate And a second cylinder block sandwiched between the third side plate and housed in the shell and forming the second cylinder chamber,
  In the discharge chamber, the lubricating oil is separated from the refrigerant gas discharged into the discharge chamber after being sucked into the suction chamber from the suction port and compressed by the first compression mechanism and the second compression mechanism, A separator is provided that stores the lubricating oil in the discharge chamber and discharges the refrigerant gas from which the lubricating oil has been separated from the discharge port,
  A common flow path communicating with the discharge chamber is formed on the drive shaft,
  The first side plate is formed with a first supply channel that communicates the common channel and each of the first back pressure chambers,
  The second side plate is formed with a second supply channel that communicates the common channel with each of the second back pressure chambers.
  The first side plate, the first cylinder block, the second side plate, the second cylinder block, and the third side plate are fixed in a state of being accommodated in the shell,
  The first side plate, the second side plate, and the third side plate are each provided with a shaft hole that rotatably holds the drive shaft,
  The common flow path has a hole extending in a radial direction toward the shaft hole in the third side plate.
  Furthermore, the tandem vane compressor according to the present invention has a suction chamber, a discharge chamber, and a compression chamber formed in a housing, and a drive shaft is rotatably supported in the housing. Accordingly, the compression chamber sucks a low-pressure refrigerant gas from the suction chamber, the compression stroke compresses the refrigerant gas in the compression chamber, and discharges the high-pressure refrigerant gas in the compression chamber to the discharge chamber. A plurality of compression mechanisms that perform the discharge stroke are tandemly coupled,
  Each of the compression mechanisms includes a first cylinder chamber formed in the housing, a first cylinder chamber rotatably provided by the drive shaft, and a plurality of first vane grooves formed in a radial direction. A rotor and a first vane that is provided in the first vane groove so as to be able to appear and retract, and forms a first compression chamber that is the compression chamber positioned forward together with the inner surface of the first cylinder chamber and the outer surface of the first rotor. A first compression mechanism having
  A second cylinder chamber formed in the housing; a second rotor provided rotatably in the second cylinder chamber by the drive shaft; and a plurality of second vane grooves formed radially; 2nd compression which has 2nd vane which is provided in the 2 vane groove so that it can be projected and retracted, and forms the 2nd compression chamber which is the compression chamber located behind with the inner surface of the 2nd cylinder room, and the outer surface of the 2nd rotor In a tandem vane compressor equipped with a mechanism,
  A space between the bottom surface of each first vane and each first vane groove is a first back pressure chamber,
  A space between the bottom surface of each second vane and each second vane groove is a second back pressure chamber,
  The housing forms a shell, a shell in which a suction port and a discharge port connected to the outside are formed, and a first side plate that is housed in the shell and forms the suction chamber that communicates with the suction port together with the shell. And a second side plate that is housed in the shell and partitions the first compression mechanism and the second compression mechanism, and the discharge chamber that is housed in the shell and communicates with the discharge port together with the shell. A third side plate to be formed, a first cylinder block sandwiched between the first side plate and the second side plate and housed in the shell and forming the first cylinder chamber, and the second side plate And a second cylinder block sandwiched between the third side plate and housed in the shell and forming the second cylinder chamber,
  In the discharge chamber, the lubricating oil is separated from the refrigerant gas discharged into the discharge chamber after being sucked into the suction chamber from the suction port and compressed by the first compression mechanism and the second compression mechanism, A separator is provided that stores the lubricating oil in the discharge chamber and discharges the refrigerant gas from which the lubricating oil has been separated from the discharge port,
  A common flow path communicating with the discharge chamber is formed on the drive shaft,
  The second side plate includes a first supply channel that communicates the common channel and the first back pressure chambers, and a second supply that communicates the common channel and the second back pressure chambers. A flow path is formed,
  The first side plate, the first cylinder block, the second side plate, the second cylinder block, and the third side plate are fixed in a state of being accommodated in the shell,
  The first side plate, the second side plate, and the third side plate are each provided with a shaft hole that rotatably holds the drive shaft,
  The common flow path has a hole extending in a radial direction toward the shaft hole in the third side plate.

In the tandem vane compressor of the present invention, the shell is formed with a suction port, a front housing that forms a suction chamber with the first side plate, a discharge port, and a discharge chamber with the third side plate. And a rear housing. Then, a first cylinder block and the second cylinder block common, first rotor and the second rotor in common, the first vane and the second vane have preferable that the common. In this case, it is possible to reduce the manufacturing cost by sharing the parts.

  The tandem vane compressor of the present invention can increase the discharge capacity per one rotation of the drive shaft, and more reliably exhibit excellent mechanical efficiency and mountability.

1 is a cross-sectional view of a tandem vane compressor of Example 1. FIG. It is a tandem type vane type compressor of Example 1, and is a II-II arrow sectional view of Drawing 1. FIG. 3 is a cross-sectional view taken along the line III-III in FIG. 1 according to the tandem vane compressor of the first embodiment. 3 is a cross-sectional view of a tandem vane type compressor according to Embodiment 2. FIG. 4 is a cross-sectional view of a tandem vane type compressor of Example 3. FIG. 6 is a cross-sectional view of a tandem vane type compressor according to Embodiment 4. FIG. It is sectional drawing of the tandem type vane type compressor of a modification.

  Embodiments 1 to 4 embodying the present invention will be described below with reference to the drawings.

Example 1
As shown in FIG. 1, the tandem vane compressor according to the first embodiment includes a first side plate 11, a first cylinder block 5, a second side plate 13 in a front housing 1 and a rear housing 3 that are coupled to each other. The second cylinder block 7 and the third side plate 15 are fixed in a accommodated state. The front housing 1 and the rear housing 3 are shells 9. The shell 9 has the same body diameter as that of the single cylinder vane compressor. The first and second cylinder blocks 5 and 7 have the same outer shape.

  As shown in FIG. 2, the first cylinder block 5 is formed with a first cylinder chamber 5a that is elliptical in the direction perpendicular to the axis. As shown in FIG. 3, the second cylinder block 7 has a first cylinder chamber 5a. A second cylinder chamber 7a having the same shape as 5a is formed. The first and second cylinder blocks 5 and 7 are fixed so that the first and second cylinder chambers 5a and 7a have the same phase.

  As shown in FIG. 1, the first cylinder block 5 is sandwiched between a first side plate 11 and a second side plate 13 and stored in a shell 9. The second side plate 13 includes a second side plate main body 13b positioned in front and a second side plate cover 13c positioned rearward of the second side plate main body 13b. The front and rear of the first cylinder chamber 5a are closed by a first side plate 11 and a second side plate body 13b, respectively.

  Further, the second cylinder block 7 is sandwiched between the second side plate cover 13 c and the third side plate 15 and stored in the shell 9. The front and rear of the second cylinder chamber 7a are closed by a second side plate cover 13c and a third side plate 15, respectively. The shell 9, the first and second cylinder blocks 5, 7 and the first to third side plates 11, 13, 15 correspond to the housing.

  The first to third side plates 11, 13, 15 are respectively provided with shaft holes 11 a, 13 a, 15 a, and sliding bearings 17, 19, 21 are press-fitted into the shaft holes 11 a, 13 a, 15 a. Yes. A shaft hole 1a is also provided through the front housing 1, and a shaft seal device 23 is press-fitted into the shaft hole 1a. The drive shaft 25 is rotatably held by the shaft seal device 23 and the sliding bearings 17, 19, and 21. An electromagnetic clutch or pulley (not shown) is fixed to the tip of the drive shaft 25 exposed from the front housing 1. A driving force is transmitted to the electromagnetic clutch or pulley by the engine or motor of the vehicle.

  The drive shaft 25 is press-fitted with first and second rotors 27 and 29 having a circular cross section. The first rotor 27 is disposed in the first cylinder chamber 5a, and the second rotor 29 is disposed in the second cylinder chamber 7a.

  As shown in FIG. 2, five first vane grooves 27a are formed in the radial direction on the outer circumferential surface of the first rotor 27, and the first vanes 31 appear and disappear in the first vane grooves 27a, respectively. It is stored as possible. A first back pressure chamber 33 is formed between the bottom surface of each first vane 31 and each first vane groove 27a. Two adjacent first vanes 31, 31, the outer peripheral surface of the first rotor 27, the inner peripheral surface of the first cylinder block 5, the rear surface of the first side plate 11, and the front surface of the second side plate body 13b A first compression chamber 35 is formed.

In addition, as shown in FIG. 3, five second vane grooves 29a are formed in the radial direction on the outer peripheral surface of the second rotor 29, and the second vane 37 is also provided in each second vane groove 29a. Is stored so that it can appear and disappear. A second back pressure chamber 39 is formed between the bottom surface of each second vane 37 and each second vane groove 29a. Two adjacent second vanes 37, 37, the outer peripheral surface of the second rotor 29, the inner peripheral surface of the second cylinder block 7, the rear surface of the second side plate cover 13c and the front surface of the third side plate 15 A second compression chamber 41 is formed.

  The first rotor 27 and the second rotor 29 are the same component. The first vane 31 and the second vane 37 are the same parts. These are those employed in single cylinder vane compressors.

  As shown in FIG. 1, a suction chamber 43 is formed between the front housing 1 and the first side plate 11. In the front housing 1, a suction port 1 b for connecting the suction chamber 43 to the outside is opened upward. The first side plate 11 is provided with two suction holes 11 b communicating with the suction chamber 43, and each suction hole 11 b communicates with each suction space 5 b of the first cylinder block 5. As shown in FIG. 2, each suction space 5b communicates with the first compression chamber 35 in the suction stroke by a suction port 5c.

  In addition, two discharge spaces 5 d are formed between the first cylinder block 5 and the rear housing 3. The compression chamber 35 in the discharge stroke and each discharge space 5d communicate with each other by a discharge port 5e. A discharge valve 45 that closes the discharge port 5e and a retainer 47 that regulates the lift amount of the discharge valve 45 are provided in each discharge space 5d. The drive shaft 25, the first cylinder block 5, the first rotor 27, the first vanes 31, the discharge valve 45, the retainer 47, and the like constitute the first compression mechanism 1C.

  As shown in FIG. 1, the second side plate 13 is provided with two suction holes 13d communicating with the suction spaces 5b of the first cylinder block 5, and the suction holes 13d are formed in the second cylinder block. 7 in communication with each suction space 7b. As shown in FIG. 3, each suction space 7b communicates with the second compression chamber 41 in the suction stroke by a suction port 7c.

As shown in FIG. 1, the second side plate 13 is provided with two discharge holes 13e communicating with the discharge spaces 5d. In addition, two discharge spaces 7 d are formed between the second cylinder block 7 and the rear housing 3. Each discharge hole 13e communicates with each discharge space 7d. As shown in FIG. 3, the second compression chamber 41 in the discharge stroke and each discharge space 7d communicate with each other by a discharge port 7e. In each discharge space 7d, a discharge valve 49 for closing the discharge port 7e and a retainer 51 for regulating the lift amount of the discharge valve 45 are provided. The drive shaft 25, the second cylinder block 7, the second rotor 29, each second vane 37, the discharge valve 49, the retainer 51, and the like constitute the second compression mechanism 2C.

  As shown in FIG. 1, the third side plate 15 is provided with two ejection holes 15b communicating with the ejection spaces 7d. A discharge chamber 53 is formed between the third side plate 15 and the rear housing 3. In the discharge chamber 53, a centrifugal separator 55 is fixed by being sandwiched between the third side plate 15 and the rear housing 3. The separator 55 includes an end frame 57 and a cylindrical member 59 that is fixed in the end frame 57 and extends vertically.

  The end frame 57 is formed with an oil separation chamber 57a that extends vertically in a cylindrical shape. A cylindrical member 59 is press-fitted into the upper end of the oil separation chamber 57a. For this reason, a part of the oil separation chamber 57 a serves as a guide surface 57 b for circulating the refrigerant gas around the outer peripheral surface of the cylindrical member 59. Both discharge holes 15b communicate with the cylindrical member 59 and the guide surface 57b. A communication port 57 c is formed at the lower end of the end frame 57 to allow the bottom surface of the oil separation chamber 57 a to communicate with the discharge chamber 53. The rear housing 3 is formed with a discharge port 3a for connecting the upper end of the discharge chamber 53 to the outside. The discharge port 3 a is located above the cylindrical member 59.

  As shown in FIGS. 1 and 2, a pair of oil drain grooves 13f having a fan shape is recessed in the front surface of the second side plate body 13b. Each oil drain groove 13f communicates with the first back pressure chamber 33 in the suction stroke or the like by the rotation of the first rotor 27. Further, as shown in FIG. 1, the second side plate body 13b is provided with a valve chamber 13g communicating with the discharge hole 13e and each oil drain groove 13f, and a ball-like shape is formed in the valve chamber 13g. The valve body 61 is accommodated. The valve body 61 is urged in a direction to open the valve chamber 13g by a spring 63 housed in the valve chamber 13g. The valve body 61 is prevented from being removed by the second side plate cover 13c. The oil drain groove 13f, the valve chamber 13g, the valve body 61, and the spring 63 constitute a first chattering prevention valve 73 that prevents chattering of the first compression mechanism 1C.

  Further, as shown in FIGS. 1 and 3, a pair of oil drain grooves 15 f having a fan shape is also recessed in the front surface of the third side plate 15. Each oil draining groove 15 f communicates with the second back pressure chamber 39 in the suction stroke or the like by the rotation of the second rotor 29. Further, as shown in FIG. 1, the third side plate 15 is provided with a valve chamber 15g communicating with the discharge chamber 53 and each oil drain groove 15f, and a ball-shaped valve is also provided in the valve chamber 15g. The body 65 is stored. The valve body 65 is urged in a direction to open the valve chamber 15g by a spring 67 housed in the valve chamber 15g. The valve body 65 is prevented from being detached by the end frame 57 of the separator 55. The oil drain groove 15f, the valve chamber 15g, the valve body 65, and the spring 67 constitute a second chattering prevention valve 75 that prevents chattering of the second compression mechanism 2C.

  In the first rotor 27 and the second rotor 29, the first and second vane grooves 27a and 29a, the oil drain grooves 13f and 15f, and the first and second chattering prevention valves 73 and 75 are in the same phase with respect to the drive shaft 25. It is fixed to.

  The slide bearing 19 is provided with a first upper flow path 19a. Further, as shown in FIG. 2, the second side plate body 13b is provided with a concave annular first middle flow path 13i that goes around the shaft hole 13a. The first upper flow path 19a and the first middle flow path 13i communicate with each other. Further, in the second side plate body 13b, two first lower flow paths 13j communicating with the first middle flow path 13i extend toward the front in the axial direction. Each first lower flow path 13j communicates with the first back pressure chamber 33 in the compression stroke and the discharge stroke by the rotation of the first rotor 27.

  Further, as shown in FIG. 1, the sliding bearing 21 is provided with a second upper flow path 21 a. Further, as shown in FIG. 3, the third side plate 15 is also provided with an annular second middle flow path 15 i that circulates around the shaft hole 15 a. The second upper flow path 21a and the second middle flow path 15i are also in communication. Furthermore, two second lower flow passages 15j communicating with the second middle flow passage 15i extend in the third side plate 15 toward the front in the axial direction. Each second lower flow path 15j communicates with the second back pressure chamber 39 in the compression stroke and the discharge stroke by the rotation of the second rotor 29.

  As shown in FIG. 1, the third side plate 15 is provided with one first flow path 15m extending upward from the lower end. The lower end of the first flow path 15 m communicates with the discharge chamber 53. The third side plate 15 and the end frame 57 form a supply chamber 57d, and the rear end of the drive shaft 25 faces the supply chamber 57d. The upper end of the first flow path 15m communicates with the second flow path 15n extending rearward in the axial direction to the supply chamber 57d.

  A third flow path 25a extending in the axial direction from the rear end to the front is formed in the rear portion of the drive shaft 25. The third flow path 25a communicates with the supply chamber 57d. The drive shaft 25 is formed with a fourth flow path 25b that extends in the radial direction from the tip of the third flow path 25a and communicates with the first upper flow path 19a and the first middle flow path 13i. Further, the drive shaft 25 is formed with a fifth flow path 25c extending in the radial direction from the middle of the third flow path 25a and communicating with the second upper flow path 21a and the second middle flow path 15i. The first flow path 15m, the second flow path 15n, the supply chamber 57d, and the third flow path 25a up to the branch position to the fifth flow path 25c are the common flow path 77. The remaining part of the third flow path 25a is a single flow path 79 for communicating with the fourth flow path 25b. The single flow path 79, the fourth flow path 25b, the first upper flow path 19a, the first middle flow path 13i, and the first lower flow path 13j are the first supply flow path 81. The fifth flow path 25c, the second upper flow path 21a, the second middle flow path 15i, and the second lower flow path 15j are the second supply flow path 83.

Drive shaft 25, sliding bearing 17, 19, 21, first side plate 11, the first cylinder block 5, the first vane 31, the discharge valve 45, the retainer 47, the second side plate 13, first chattering preventing valve 73, The second cylinder block 7, each second vane 37, the discharge valve 49, the retainer 51, the third side plate 15, the second chattering prevention valve 75, and the separator 55 are assembled as a sub assembly SA.

  An O-ring is attached to the sub-assembly SA, and this is inserted into the rear housing 3. Next, an O-ring is mounted on the rear housing 3 and the front housing 1 is put on the O-ring. Then, a plurality of bolts 71 shown in FIGS. 2 and 3 are fastened. Thus, the tandem vane type compressor of Example 1 is assembled.

  In this tandem vane compressor, although not shown, the discharge port 3a is connected to the condenser by piping, the condenser is connected to the expansion valve by piping, the expansion valve is connected to the evaporator by piping, and the evaporator Is connected to the inlet 1b by a pipe. A tandem vane compressor, a condenser, an expansion valve, an evaporator, and piping constitute a refrigeration circuit. This refrigeration circuit constitutes a vehicle air conditioner.

  In the tandem vane compressor, when the drive shaft 25 is driven by an engine or the like, the first and second compression mechanisms 1C and 2C repeat the suction stroke, the compression stroke, and the discharge stroke, respectively.

  That is, the first and second rotors 27 and 29 rotate in synchronization with the drive shaft 25, and the first and second compression chambers 35 and 41 undergo volume changes. For this reason, the refrigerant gas having passed through the evaporator is sucked into the suction chamber 43 from the suction port 1b. The refrigerant gas in the suction chamber 43 is sucked into the first compression chamber 35 through the suction hole 11b, the suction space 5b, and the suction port 5c. The refrigerant gas in the suction space 5b is sucked into the second compression chamber 41 through the suction hole 13d, the suction space 7b, and the suction port 7c.

The refrigerant gas compressed in the first compression chamber 35 is discharged into the discharge space 5d through the discharge port 5e. The high-pressure refrigerant gas in the discharge space 5d reaches the discharge space 7d through the discharge hole 13e. The refrigerant gas compressed in the second compression chamber 41 is discharged into the space 7d out ejection through the discharge port 7e. The high-pressure refrigerant gas in the discharge space 7d is discharged toward the guide surface 57b of the separator 55 through the discharge hole 15b. For this reason, the refrigerant gas circulates around the guide surface 57b, and the lubricating oil is centrifuged. The refrigerant gas from which the lubricating oil has been separated is discharged from the discharge port 3a toward the condenser. Thus, in this tandem vane type compressor, the discharge capacity per rotation of the drive shaft 25 is doubled compared to the single cylinder type vane compressor.

  Further, in this tandem type vane compressor, the first and second vanes 31 and 37 each have a short shaft length employed in the single cylinder type vane compressor, so that it is difficult to tilt forward and backward. For this reason, leakage of the refrigerant gas from the first and second compression chambers 35 and 41 is small, and the slidability of the first and second vanes 31 and 37 is excellent.

  The separated lubricating oil is stored in the discharge chamber 53 from the oil separation chamber 57a through the communication port 57c. The lubricating oil in the discharge chamber 53 is supplied to the third flow path 25a through the first flow path 15m, the second flow path 15n, and the supply chamber 57d because the discharge chamber 53 has a high pressure. The lubricating oil in the single flow path 79 of the third flow path 25a is supplied to the first lower flow path 13j via the fourth flow path 25b, the first upper flow path 19a, and the first middle flow path 13i in the first compression mechanism 1C. The For this reason, high-pressure lubricating oil is supplied to each first back pressure chamber 33 in the compression stroke and the discharge stroke.

  The lubricating oil in the third flow path 25a branches from the common flow path 77 to the single flow path 79 and the fifth flow path 25c. Then, the lubricating oil in the fifth flow path 25c is supplied to the second lower flow path 15j through the second upper flow path 21a and the second middle flow path 15i in the second compression mechanism 2C. For this reason, high-pressure lubricating oil is supplied to each second back pressure chamber 39 in the compression stroke and the discharge stroke.

  For this reason, in this tandem type vane type compressor, while the first and second compression mechanisms 1C and 2C perform the compression stroke, the first and second vanes 31 and 37 are the inner surfaces of the first and second cylinder chambers 5a and 7a. The refrigerant gas from the first and second compression chambers 35 and 41 is less leaked. Therefore, these tandem vane compressors can reliably exhibit high mechanical efficiency. Further, in this tandem type vane compressor, it is not necessary to communicate each of the first back pressure chambers 33 and each of the second back pressure chambers 39 with the discharge chamber 53 separately, so that the manufacturing cost can be reduced.

  Furthermore, since this tandem vane type compressor has the same body diameter as that of the single cylinder type vane type compressor, it can also exhibit excellent mountability.

  The lubricating oil supplied to each first back pressure chamber 33 slides between the first vane 31 and the first vane groove 27a, the first rotor 27, the first side plate 11, and the second side plate main body 13b. Contributes to lubrication such as sliding between the sliding bearings 17 and 19 and the driving shaft 25. The lubricating oil supplied to each second back pressure chamber 39 is slid between the second vane 37 and the second vane groove 29a, the second rotor 29, the second side plate cover 13c, and the third side plate 15 This contributes to lubrication such as sliding, sliding between the sliding bearings 19 and 21 and the drive shaft 25.

  Therefore, in the tandem vane compressor, the discharge capacity per rotation of the drive shaft 25 can be increased, and excellent mechanical efficiency and mountability can be more reliably exhibited.

  In the tandem vane compressor, both compression mechanisms 1 </ b> C and 2 </ b> C apply back pressure at a position close to the discharge chamber 53. For this reason, the distance from the discharge chamber 53 to the back pressure chambers 33 and 39 is short, and the pressure loss can be reduced. Moreover, since the 3rd flow path 25a is short, a processing man-hour can also be reduced.

  Furthermore, with this tandem vane compressor, back pressure is unlikely to leak into the suction chamber 43 and power loss can be reduced.

  In the tandem type vane compressor, the first cylinder block 5 and the second cylinder block 7 are common, the first rotor 27 and the second rotor 29 are common, and the first vane 31 and the second vane 37. Therefore, it is possible to reduce the manufacturing cost by sharing parts.

(Example 2)
In the tandem vane compressor according to the second embodiment, as shown in FIG. 4, the sliding bearing 17 is provided with a first upper flow path 17 a. Further, the first side plate 11 is provided with an annular first middle flow path 11i that circulates around the shaft hole 11a. The first upper flow path 17a and the first middle flow path 11i communicate with each other. Further, the first side plate 11 has two first lower flow paths 11j communicating with the first middle flow path 11i extending rearward in the axial direction. Each first lower flow path 11j communicates with the first back pressure chamber 33 in the compression stroke and the discharge stroke by the rotation of the first rotor 27.

  The sliding bearing 21 and the third side plate 15 are formed with a second upper flow path 21a, a second middle flow path 15i, and a second lower flow path 15j, as in the first embodiment.

  The drive shaft 25 is formed with a third flow path 25d that is longer than the first embodiment and extends in the axial direction from the rear end toward the front. The third flow path 25d also communicates with the supply chamber 57d. The drive shaft 25 is formed with a fourth flow path 25e that extends in the radial direction from the tip of the third flow path 25d and communicates with the first upper flow path 17a and the first middle flow path 11i. Further, a fifth flow path 25c is formed in the drive shaft 25 as in the first embodiment. The first flow path 15m, the second flow path 15n, the supply chamber 57d, and the third flow path 25d up to the branch position to the fifth flow path 25c are the common flow path 77. The remaining part of the third flow path 25d is a single flow path 79 for communicating with the fourth flow path 25e. The single flow path 79, the fourth flow path 25e, the first upper flow path 17a, the first middle flow path 11i, and the first lower flow path 11j are the first supply flow path 81. The fifth flow path 25c, the second upper flow path 21a, the second middle flow path 15i, and the second lower flow path 15j are the second supply flow path 83.

  Other configurations are the same as those of the first embodiment. For this reason, the same code | symbol as Example 1 is attached | subjected about the structure similar to Example 1, and detailed description is abbreviate | omitted.

  In this tandem vane type compressor, back pressure can be applied from the front to the first back pressure chamber 33 located at the front, and back pressure can be applied from the back to the second back pressure chamber 39 located at the rear. Therefore, back pressure can be easily applied to the first and second vanes 31 and 37 in a balanced manner. For this reason, the first and second vanes 31 and 37 are unlikely to be inclined in the first and second vane grooves 27a and 29a at the time of startup, and a smooth rise can be expected.

  Further, in this tandem type vane compressor, since the drive shaft 25 can be supported by the reaction of back pressure before and after a large span, it can be expected that the long drive shaft 25 is rotated under low vibration. Further, in this tandem type vane compressor, it is easy to supply lubricating oil to the front sliding bearing 17 and the rotation of the drive shaft 25 tends to be smooth. Other functions and effects are the same as those of the first embodiment.

(Example 3)
In the tandem vane compressor according to the third embodiment, as shown in FIG. 5, the sliding bearing 19 is provided with a second upper flow path 19 b. Further, the second side plate 13 is provided with an annular second middle flow path 13q that goes around the shaft hole 13a. The second upper flow path 19b and the second middle flow path 13q communicate with each other. Furthermore, two second lower flow paths 13r communicating with the second middle flow path 13q extend in the second side plate 13 toward the rear in the axial direction. Each second lower flow path 13r communicates with the second back pressure chamber 39 in the compression stroke and the discharge stroke by the rotation of the second rotor 29.

Further, similarly to the second embodiment, the sliding bearing 17 is provided with a first upper flow path 17a. The first side plate 11 is formed with a first middle flow path 11i and a first lower flow path 11j.

Further, as in the second embodiment, the drive shaft 25 is formed with a third flow path 25d. Further, the fourth flow path 25e is formed in the drive shaft 25 as in the second embodiment. Further, the drive shaft 25 is formed with a fifth flow path 25f extending in the radial direction from the middle of the third flow path 25d and communicating with the second upper flow path 19b and the second middle flow path 13q. The first flow path 15m, the second flow path 15n, the supply chamber 57d, and the third flow path 25d up to the branch position to the fifth flow path 25f are the common flow path 77. The remaining part of the third flow path 25d is a single flow path 79 for communicating with the fourth flow path 25e. The single flow path 79, the fourth flow path 25e, the first upper flow path 17a, the first middle flow path 11i, and the first lower flow path 11j are the first supply flow path 81. The fifth flow path 25f, the second upper flow path 19b, the second middle flow path 13q, and the second lower flow path 13r are the second supply flow path 83.

  Other configurations are the same as those in the first and second embodiments. For this reason, about the structure similar to Example 1, 2, the code | symbol same as Example 1, 2 is attached | subjected and detailed description is abbreviate | omitted.

  In this tandem type vane compressor, the lubricating oil is easily supplied to the front sliding bearing 17 and the rotation of the drive shaft 25 is likely to be smooth. Other functions and effects are the same as those of the first embodiment.

Example 4
In the tandem vane compressor of the fourth embodiment, as shown in FIG. 6, the sliding bearing 19 is provided with an upper flow path 19c. Further, the second side plate 13 is provided with an annular middle flow path 13l that circulates around the shaft hole 13a. The upper flow path 19c and the middle flow path 13l communicate with each other. Further, the second side plate 13 has two first lower flow paths 13m communicating with the middle flow path 13l extending forward in the axial direction, and two second lower flow paths communicating with the middle flow path 13l. 13n extends toward the rear in the axial direction. Each first lower flow path 13 m communicates with the first back pressure chamber 33 in the compression stroke and the discharge stroke by the rotation of the first rotor 27. Each second lower flow path 13n communicates with the second back pressure chamber 39 in the compression stroke and the discharge stroke by the rotation of the second rotor 29.

  As in the first embodiment, the drive shaft 25 has a third flow path 25a. The drive shaft 25 is formed with a fourth flow path 25g that extends in the radial direction from the middle of the third flow path 25a and communicates with the upper flow path 19c and the middle flow path 13l. The first flow path 15m, the second flow path 15n, the supply chamber 57d, and the third flow path 25a are the common flow path 77. The fourth flow path 25g, the upper flow path 19c, the middle flow path 13l, and the first lower flow path 13m are the first supply flow path 81. The fourth flow path 25g, the upper flow path 19c, the middle flow path 13l, and the second lower flow path 13n are the second supply flow path 83.

  Other configurations are the same as those of the first embodiment. For this reason, the same code | symbol as Example 1 is attached | subjected about the structure similar to Example 1, and detailed description is abbreviate | omitted.

  In this tandem type vane compressor, since it is sufficient to form the third flow path 25a and the fourth flow path 25g in the drive shaft 25, the number of processing steps can be reduced. Other functions and effects are the same as those of the first embodiment.

  In the tandem vane compressor, the fourth flow path 25g, the upper flow path 19c, and the middle flow path 13l can be regarded as a common flow path.

  In the above, the present invention has been described with reference to the first to fourth embodiments. However, the present invention is not limited to the first to fourth embodiments, and can be appropriately modified and applied without departing from the spirit of the present invention. Needless to say.

  For example, the shape of the housing is not limited as in the first to fourth embodiments. For example, as shown in FIG. 7, the first cylinder block 5 and one of the first and second side plates 11 and 13 are integrated, and the second cylinder block 7 and one of the second and third side plates 13 and 15 are integrated. May be integrated. The common flow path, the first supply flow path, and the second supply flow path may be the same as those shown in FIGS.

  Two sliding bearings 17, 19, and 21 may be provided at the front and rear, and the first upper flow paths 17a, 19a, and 19b, the second upper flow path 21a, and the upper flow path 19c may be provided between them.

  In addition to the first compression mechanism 1C and the second compression mechanism 2C, a third compression mechanism or the like may be provided.

  In the first to fourth embodiments, the first compression mechanism 1C and the second compression mechanism 2C are operated in the same phase, but for the purpose of reducing discharge pulsation, the first compression mechanism 1C and the second compression mechanism 2C Can be operated in different phases.

  Further, the refrigerant gas compressed by the first compression mechanism 1C can be sucked into the second compression mechanism 2C and further compressed by the second compression mechanism 2C, so that it can be compressed in multiple stages.

  Alternatively, the second side plate 13 may not be provided with the second side plate cover 13 c and the valve body 61 of the chattering prevention valve 73 may be pressed by the second rotor 29.

  If the passage diameter is changed depending on the position of the common flow path, the lubricating oil can be optimally supplied to the first and second back pressure chambers.

  The present invention is applicable to a vehicle air conditioner.

DESCRIPTION OF SYMBOLS 1, 3, 5, 7, 9, 11, 13, 15 ... Housing 1 ... Front housing 3 ... Rear housing 5 ... 1st cylinder block 7 ... 2nd cylinder block 9 ... Shell 11 ... 1st side plate 13 ... 2nd Side plate 15 ... Third side plate 43 ... Suction chamber 53 ... Discharge chamber 35 ... First compression chamber 41 ... Second compression chamber 25 ... Drive shaft 1C ... First compression mechanism 2C ... Second compression mechanism 5a ... First cylinder chamber 27a ... first vane groove 27 ... first rotor 31 ... first vane 7a ... second cylinder chamber 29a ... second vane groove 29 ... second rotor 37 ... second vane 33 ... first back pressure chamber 39 ... second back Pressure chamber 1b ... Suction port 3a ... Discharge port 77 ... Common channel
55 ... Separator 81 ... First supply channel 83 ... Second supply channel

Claims (5)

A suction chamber, a discharge chamber, and a compression chamber are formed in the housing, and a drive shaft is rotatably supported in the housing. The rotation of the drive shaft causes the compression chamber to move from the suction chamber to a low-pressure refrigerant. A plurality of compression mechanisms that perform a suction stroke for sucking gas, a compression stroke for compressing the refrigerant gas in the compression chamber, and a discharge stroke for discharging the high-pressure refrigerant gas in the compression chamber to the discharge chamber are tandemly coupled. And
Each of the compression mechanisms includes a first cylinder chamber formed in the housing, a first cylinder chamber rotatably provided by the drive shaft, and a plurality of first vane grooves formed in a radial direction. A rotor and a first vane that is provided in the first vane groove so as to be able to appear and retract, and forms a first compression chamber that is the compression chamber positioned forward together with the inner surface of the first cylinder chamber and the outer surface of the first rotor. A first compression mechanism having
A second cylinder chamber formed in the housing; a second rotor provided rotatably in the second cylinder chamber by the drive shaft; and a plurality of second vane grooves formed radially; 2nd compression which has 2nd vane which is provided in the 2 vane groove so that it can be projected and retracted, and forms the 2nd compression chamber which is the compression chamber located behind with the inner surface of the 2nd cylinder room, and the outer surface of the 2nd rotor In a tandem vane compressor equipped with a mechanism,
A space between the bottom surface of each first vane and each first vane groove is a first back pressure chamber,
A space between the bottom surface of each second vane and each second vane groove is a second back pressure chamber,
The housing forms a shell, a shell in which a suction port and a discharge port connected to the outside are formed, and a first side plate that is housed in the shell and forms the suction chamber that communicates with the suction port together with the shell. And a second side plate that is housed in the shell and partitions the first compression mechanism and the second compression mechanism, and the discharge chamber that is housed in the shell and communicates with the discharge port together with the shell. A third side plate to be formed, a first cylinder block sandwiched between the first side plate and the second side plate and housed in the shell and forming the first cylinder chamber, and the second side plate And a second cylinder block sandwiched between the third side plate and housed in the shell and forming the second cylinder chamber,
In the discharge chamber, the lubricating oil is separated from the refrigerant gas discharged into the discharge chamber after being sucked into the suction chamber from the suction port and compressed by the first compression mechanism and the second compression mechanism, A separator is provided that stores the lubricating oil in the discharge chamber and discharges the refrigerant gas from which the lubricating oil has been separated from the discharge port,
A common flow path communicating with the discharge chamber is formed on the drive shaft,
The second side plate is formed with a first supply channel that communicates the common channel with each of the first back pressure chambers,
The third side plate is formed with a second supply channel that communicates the common channel and each of the second back pressure chambers .
The first side plate, the first cylinder block, the second side plate, the second cylinder block, and the third side plate are fixed in a state of being accommodated in the shell,
The first side plate, the second side plate, and the third side plate are each provided with a shaft hole that rotatably holds the drive shaft,
The common channel has a hole extending in a radial direction toward the shaft hole in the third side plate . A suction chamber, a discharge chamber, and a compression chamber are formed in the housing, and a drive shaft is rotatably supported in the housing. The rotation of the drive shaft causes the compression chamber to move from the suction chamber to a low-pressure refrigerant. A plurality of compression mechanisms that perform a suction stroke for sucking gas, a compression stroke for compressing the refrigerant gas in the compression chamber, and a discharge stroke for discharging the high-pressure refrigerant gas in the compression chamber to the discharge chamber are tandemly coupled. And
Each of the compression mechanisms includes a first cylinder chamber formed in the housing, a first cylinder chamber rotatably provided by the drive shaft, and a plurality of first vane grooves formed in a radial direction. A rotor and a first vane that is provided in the first vane groove so as to be able to appear and retract, and forms a first compression chamber that is the compression chamber positioned forward together with the inner surface of the first cylinder chamber and the outer surface of the first rotor. A first compression mechanism having
A second cylinder chamber formed in the housing; a second rotor provided rotatably in the second cylinder chamber by the drive shaft; and a plurality of second vane grooves formed radially; 2nd compression which has 2nd vane which is provided in the 2 vane groove so that it can be projected and retracted, and forms the 2nd compression chamber which is the compression chamber located behind with the inner surface of the 2nd cylinder room, and the outer surface of the 2nd rotor In a tandem vane compressor equipped with a mechanism,
A space between the bottom surface of each first vane and each first vane groove is a first back pressure chamber,
A space between the bottom surface of each second vane and each second vane groove is a second back pressure chamber,
The housing forms a shell, a shell in which a suction port and a discharge port connected to the outside are formed, and a first side plate that is housed in the shell and forms the suction chamber that communicates with the suction port together with the shell. And a second side plate that is housed in the shell and partitions the first compression mechanism and the second compression mechanism, and the discharge chamber that is housed in the shell and communicates with the discharge port together with the shell. A third side plate to be formed, a first cylinder block sandwiched between the first side plate and the second side plate and housed in the shell and forming the first cylinder chamber, and the second side plate And a second cylinder block sandwiched between the third side plate and housed in the shell and forming the second cylinder chamber,
In the discharge chamber, the lubricating oil is separated from the refrigerant gas discharged into the discharge chamber after being sucked into the suction chamber from the suction port and compressed by the first compression mechanism and the second compression mechanism, A separator is provided that stores the lubricating oil in the discharge chamber and discharges the refrigerant gas from which the lubricating oil has been separated from the discharge port,
A common flow path communicating with the discharge chamber is formed on the drive shaft,
The first side plate is formed with a first supply channel that communicates the common channel and each of the first back pressure chambers,
The third side plate is formed with a second supply channel that communicates the common channel and each of the second back pressure chambers .
The first side plate, the first cylinder block, the second side plate, the second cylinder block, and the third side plate are fixed in a state of being accommodated in the shell,
The first side plate, the second side plate, and the third side plate are each provided with a shaft hole that rotatably holds the drive shaft,
The common channel has a hole extending in a radial direction toward the shaft hole in the third side plate . A suction chamber, a discharge chamber, and a compression chamber are formed in the housing, and a drive shaft is rotatably supported in the housing. The rotation of the drive shaft causes the compression chamber to move from the suction chamber to a low-pressure refrigerant. A plurality of compression mechanisms that perform a suction stroke for sucking gas, a compression stroke for compressing the refrigerant gas in the compression chamber, and a discharge stroke for discharging the high-pressure refrigerant gas in the compression chamber to the discharge chamber are tandemly coupled. And
Each of the compression mechanisms includes a first cylinder chamber formed in the housing, a first cylinder chamber rotatably provided by the drive shaft, and a plurality of first vane grooves formed in a radial direction. A rotor and a first vane that is provided in the first vane groove so as to be able to appear and retract, and forms a first compression chamber that is the compression chamber positioned forward together with the inner surface of the first cylinder chamber and the outer surface of the first rotor. A first compression mechanism having
A second cylinder chamber formed in the housing; a second rotor provided rotatably in the second cylinder chamber by the drive shaft; and a plurality of second vane grooves formed radially; 2nd compression which has 2nd vane which is provided in the 2 vane groove so that it can be projected and retracted, and forms the 2nd compression chamber which is the compression chamber located behind with the inner surface of the 2nd cylinder room, and the outer surface of the 2nd rotor In a tandem vane compressor equipped with a mechanism,
A space between the bottom surface of each first vane and each first vane groove is a first back pressure chamber,
A space between the bottom surface of each second vane and each second vane groove is a second back pressure chamber,
The housing forms a shell, a shell in which a suction port and a discharge port connected to the outside are formed, and a first side plate that is housed in the shell and forms the suction chamber that communicates with the suction port together with the shell. And a second side plate that is housed in the shell and partitions the first compression mechanism and the second compression mechanism, and the discharge chamber that is housed in the shell and communicates with the discharge port together with the shell. A third side plate to be formed, a first cylinder block sandwiched between the first side plate and the second side plate and housed in the shell and forming the first cylinder chamber, and the second side plate And a second cylinder block sandwiched between the third side plate and housed in the shell and forming the second cylinder chamber,
In the discharge chamber, the lubricating oil is separated from the refrigerant gas discharged into the discharge chamber after being sucked into the suction chamber from the suction port and compressed by the first compression mechanism and the second compression mechanism, A separator is provided that stores the lubricating oil in the discharge chamber and discharges the refrigerant gas from which the lubricating oil has been separated from the discharge port,
A common flow path communicating with the discharge chamber is formed on the drive shaft,
The first side plate is formed with a first supply channel that communicates the common channel and each of the first back pressure chambers,
The second side plate is formed with a second supply channel that communicates the common channel with each of the second back pressure chambers .
The first side plate, the first cylinder block, the second side plate, the second cylinder block, and the third side plate are fixed in a state of being accommodated in the shell,
The first side plate, the second side plate, and the third side plate are each provided with a shaft hole that rotatably holds the drive shaft,
The common channel has a hole extending in a radial direction toward the shaft hole in the third side plate . A suction chamber, a discharge chamber, and a compression chamber are formed in the housing, and a drive shaft is rotatably supported in the housing. The rotation of the drive shaft causes the compression chamber to move from the suction chamber to a low-pressure refrigerant. A plurality of compression mechanisms that perform a suction stroke for sucking gas, a compression stroke for compressing the refrigerant gas in the compression chamber, and a discharge stroke for discharging the high-pressure refrigerant gas in the compression chamber to the discharge chamber are tandemly coupled. And
Each of the compression mechanisms includes a first cylinder chamber formed in the housing, a first cylinder chamber rotatably provided by the drive shaft, and a plurality of first vane grooves formed in a radial direction. A rotor and a first vane that is provided in the first vane groove so as to be able to appear and retract, and forms a first compression chamber that is the compression chamber positioned forward together with the inner surface of the first cylinder chamber and the outer surface of the first rotor. A first compression mechanism having
A second cylinder chamber formed in the housing; a second rotor provided rotatably in the second cylinder chamber by the drive shaft; and a plurality of second vane grooves formed radially; 2nd compression which has 2nd vane which is provided in the 2 vane groove so that it can be projected and retracted, and forms the 2nd compression chamber which is the compression chamber located behind with the inner surface of the 2nd cylinder room, and the outer surface of the 2nd rotor In a tandem vane compressor equipped with a mechanism,
A space between the bottom surface of each first vane and each first vane groove is a first back pressure chamber,
A space between the bottom surface of each second vane and each second vane groove is a second back pressure chamber,
The housing forms a shell, a shell in which a suction port and a discharge port connected to the outside are formed, and a first side plate that is housed in the shell and forms the suction chamber that communicates with the suction port together with the shell. And a second side plate that is housed in the shell and partitions the first compression mechanism and the second compression mechanism, and the discharge chamber that is housed in the shell and communicates with the discharge port together with the shell. A third side plate to be formed, a first cylinder block sandwiched between the first side plate and the second side plate and housed in the shell and forming the first cylinder chamber, and the second side plate And a second cylinder block sandwiched between the third side plate and housed in the shell and forming the second cylinder chamber,
In the discharge chamber, the lubricating oil is separated from the refrigerant gas discharged into the discharge chamber after being sucked into the suction chamber from the suction port and compressed by the first compression mechanism and the second compression mechanism, A separator is provided that stores the lubricating oil in the discharge chamber and discharges the refrigerant gas from which the lubricating oil has been separated from the discharge port,
A common flow path communicating with the discharge chamber is formed on the drive shaft,
The second side plate includes a first supply channel that communicates the common channel and the first back pressure chambers, and a second supply that communicates the common channel and the second back pressure chambers. A flow path is formed ,
The first side plate, the first cylinder block, the second side plate, the second cylinder block, and the third side plate are fixed in a state of being accommodated in the shell,
The first side plate, the second side plate, and the third side plate are each provided with a shaft hole that rotatably holds the drive shaft,
The common channel has a hole extending in a radial direction toward the shaft hole in the third side plate . The shell includes a front housing in which the suction port is formed and forms the suction chamber together with the first side plate, and a rear housing in which the discharge port is formed and forms the discharge chamber together with the third side plate. Become
The first cylinder block and the second cylinder block are common,
The first rotor and the second rotor are common,
The tandem vane compressor according to any one of claims 1 to 4, wherein the first vane and the second vane are common.

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