WO2021049273A1 - Compresseur électrique horizontal - Google Patents

Compresseur électrique horizontal Download PDF

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Publication number
WO2021049273A1
WO2021049273A1 PCT/JP2020/031582 JP2020031582W WO2021049273A1 WO 2021049273 A1 WO2021049273 A1 WO 2021049273A1 JP 2020031582 W JP2020031582 W JP 2020031582W WO 2021049273 A1 WO2021049273 A1 WO 2021049273A1
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WIPO (PCT)
Prior art keywords
chamber
rotating shaft
compression mechanism
storage chamber
electric compressor
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PCT/JP2020/031582
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English (en)
Japanese (ja)
Inventor
裕光 大野
隆久 戸部
和久 角田
芳夫 小和田
達也 大木
Original Assignee
サンデン・アドバンストテクノロジー株式会社
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Publication of WO2021049273A1 publication Critical patent/WO2021049273A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/02—Lubrication; Lubricant separation

Definitions

  • the present invention relates to a horizontal electric compressor, and more particularly to a horizontal electric compressor that can be suitably used as a compressor installed in a moving body such as an automobile.
  • the horizontal rotary compressor described in Patent Document 1 is known as an example of this type of horizontal electric compressor.
  • the inside of the closed container is partitioned by a partition member into an oil storage space where the compression mechanism is located and a space on the motor side where the motor is located.
  • the horizontal rotary compressor is an oil supply passage including a center hole provided in the rotating shaft, an oil guide hole for communicating the center hole and each sliding portion of the compression mechanism portion, and an oil suction pipe. have.
  • the oil supply passage is configured to suck up the lubricating oil in the oil storage space and supply it to each sliding portion of the compression mechanism by utilizing the pressure difference between the oil storage space and the center hole. There is.
  • the oil storage space and the motor side space communicate with each other through an oil communication hole provided in the lower part of the partition member. Therefore, for example, when the horizontal rotary compressor is tilted in a direction in which the space on the motor side is lower than that on the space side of the oil storage portion, the lubricating oil may be biased toward the space on the motor side. Further, in the horizontal rotary compressor, the oil storage portion space and the motor side space are filled with high-pressure gas through the gas communication hole, and the rotation between the compression mechanism portion and the electric motor portion. The end of the spindle supporting the shaft on the motor side is located in the space on the motor side where the high-pressure gas compressed by the compression mechanism is discharged. For this reason, a pressure difference cannot be obtained between the center hole and the main bearing, sufficient lubrication cannot be performed on the main bearing, and galling or seizure may occur in the main bearing.
  • the present invention can secure a sufficient amount of lubricating oil on the compression mechanism side even when tilted, and lubricate the bearing portion of the rotating shaft located between the motor portion and the compression mechanism portion. It is an object of the present invention to provide a horizontal electric compressor that can be sufficiently performed.
  • a horizontal electric compressor has an electric motor unit that rotates a rotating shaft in a housing and a compression mechanism unit that is driven via the rotating shaft. Further, in the horizontal electric compressor, a bearing portion of the rotating shaft that rotatably supports the rotating shaft is provided between the electric motor portion and the compression mechanism portion.
  • the horizontal electric compressor is integrally provided in the housing, accommodates the first storage chamber for accommodating the electric motor portion and the compression mechanism portion, and has a pressure higher than the pressure in the first storage chamber.
  • a partition wall portion that partitions the inside of the housing into the second storage chamber, and an oil supply passage for supplying lubricating oil to the bearing portion, one end of which is located in the second storage chamber and the other end.
  • the side communicates with the first accommodating chamber via the bearing portion, and the lubricating oil is supplied to the bearing portion by utilizing the pressure difference between the second accommodating chamber and the first accommodating chamber. It has the oil supply passage.
  • FIG. 1 is a cross-sectional view taken along the line AA of FIG. It is a cross-sectional view of BB of FIG.
  • FIG. 3 is a cross-sectional view taken along the line CC of FIG.
  • FIG. 5 is a cross-sectional view taken along the line DD of FIG.
  • FIG. 5 is a cross-sectional view taken along the line EE of FIG. It is a figure which shows the flow of the refrigerant (gas) in the horizontal type electric compressor. It is a figure which shows the flow of the lubricating oil in the horizontal type electric compressor.
  • FIG. 1 is a cross-sectional view of a horizontal electric compressor according to an embodiment of the present invention.
  • the horizontal electric compressor (hereinafter, simply referred to as “electric compressor”) 100 has a housing 110.
  • the housing 110 has a cylindrical center housing 110a, a bottomed cylindrical front housing 110b whose open end side is joined to the front end (left end in FIG. 1) of the center housing 110a, and a rear end (open end side) of the center housing 110a (the open end side). Includes a bottomed cylindrical rear housing 110c joined to the right end in FIG. 1).
  • the inside of the housing 110 is divided into a first storage chamber 113 on the front housing 110b side and a second storage chamber 115 on the rear housing 110c side by a partition wall portion 111 integrally provided in the center housing 110a.
  • the first accommodation chamber 113 is formed by the center housing 110a and the front housing 110b
  • the second accommodation chamber 115 is formed by the center housing 110a and the rear housing 110c.
  • the partition wall portion 111 is integrally formed with the center housing 110a by, for example, casting. However, it is not limited to this.
  • the partition wall portion 111 may be integrated with the center housing 110a.
  • the partition wall portion 111 may be integrated with the center housing 110a by welding, or may be integrated with the center housing 110a by a joining technique other than welding.
  • a boss portion 111a projecting toward the first storage chamber 113 is formed at the radial center portion of the partition wall portion 111. Further, the partition wall portion 111 is formed with a first shaft hole 111b that penetrates from the tip surface of the boss portion 111a to the surface on the second accommodation chamber 115 side.
  • An intermediate portion of the rotating shaft 200 extending in the horizontal direction (front-back direction) is rotatably inserted into the first shaft hole 111b.
  • One end (front end) side of the rotating shaft 200 is located in the first accommodating chamber 113, and the other end (rear end) side of the rotating shaft 200 is located in the second accommodating chamber 115.
  • a minute gap (clearance) CL is formed between the inner peripheral surface of the first shaft hole 111b and the outer peripheral surface of the rotating shaft 200.
  • the minute gap CL is set so that the rotating shaft 200 can rotate and can be sealed by the lubricating oil O described later.
  • the electric motor unit 10 for rotating the rotating shaft 200 is housed in the first storage chamber 113. Further, the first accommodation chamber 113 communicates with the low pressure side of an external refrigerant circuit (not shown) via a suction port 117 formed in the front housing 110b.
  • the suction port 117 is located at a position opposite to the partition wall portion 111 across the electric motor portion 10 in the axial direction of the rotating shaft 200, and at a position corresponding to the rotating shaft 200 in the height (upper and lower) direction (that is, the rotating shaft). It is provided at a position (at almost the same height as 200).
  • the electric motor unit 10 includes a stator 11 and a rotor 12.
  • the stator 11 is fixed to the inner peripheral surface of the housing 110. Specifically, the stator 11 is fixed to the inner peripheral surface of a portion of the center housing 110a on the front housing 110b side of the partition wall portion 111.
  • the stator 11 has a stator core 11a formed of a magnetic material in a cylindrical shape, and a stator coil 11b wound around the stator core 11a (the teeth portion) by, for example, concentrated winding.
  • the rotor 12 is arranged with a predetermined gap inside the stator 11 in the radial direction.
  • a permanent magnet is incorporated in the rotor 12.
  • the rotor 12 is formed in a cylindrical shape, and is fixed to the rotating shaft 200 with the front end side of the rotating shaft 200 inserted through the hollow portion thereof.
  • the rotor 12 is rotated by supplying electric power to the stator 11 (stator coil 11b) via the airtight terminal portion 20 provided in the front housing 110b, whereby the rotating shaft 200 is rotated. It is configured in.
  • the second accommodating chamber 115 accommodates the compression mechanism unit 30 driven via the rotating shaft 200.
  • the compression mechanism unit 30 is configured as a rotary compressor. However, the present invention is not limited to this, and the compression mechanism unit 30 may be configured as a compressor other than the rotary compressor.
  • the second storage chamber 115 communicates with the high pressure side of the external refrigerant circuit via a discharge port 119 formed in the rear housing 110c.
  • the discharge port 119 is provided at a position on the partition wall 111 side of the discharge hole 53 described later in the axial direction of the rotary shaft 200, and at a position corresponding to the rotary shaft 200 in the height direction like the suction port 117. There is.
  • the bottom of the second storage chamber 115 constitutes a lubricating oil storage portion in which the lubricating oil O is stored.
  • the lubricating oil O is mainly stored in the second storage chamber 115, and is hardly stored in the first storage chamber 113.
  • the compression mechanism portion 30 has an outer diameter smaller than the inner diameter of the housing 110. Further, the lower portion of the compression mechanism portion 30 is immersed in the lubricating oil O (that is, it is located below the oil level of the lubricating oil O).
  • the compression mechanism unit 30 includes a first compression mechanism unit 30A and a second compression mechanism unit 30B arranged on both sides of the intermediate partition plate 40.
  • the first compression mechanism portion 30A is arranged on the partition wall portion 111 side (that is, the front side) of the intermediate partition plate 40
  • the second compression mechanism portion 30B is on the side opposite to the partition wall portion 111 side of the intermediate partition plate 40 (that is, the front side). That is, it is arranged on the rear side).
  • An insertion hole through which the rotating shaft 200 is inserted is formed in the radial center portion of the intermediate partition plate 40.
  • FIG. 2 is an enlarged view of a main part of FIG. 1, and mainly shows a compression mechanism part 30.
  • FIG. 3 is a cross-sectional view taken along the line AA of FIG. 1 and mainly shows the configuration of the first compression mechanism portion 30A.
  • FIG. 4 is a cross-sectional view taken along the line BB of FIG. 1, and the configuration is mainly shown in the second compression mechanism portion 30B.
  • the first compression mechanism unit 30A includes a first cylinder 31A, a first eccentric roller 33A, and a first vane 35A.
  • the first cylinder 31A has a first cylinder chamber 37A having a circular cross section at the center in the radial direction.
  • the first eccentric roller 33A is attached to the first eccentric portion 201 of the rotating shaft 200 located in the first cylinder chamber 37A of the first cylinder 31A.
  • the first eccentric roller 33A eccentrically rotates in the first cylinder chamber 37A of the first cylinder 31A as the rotating shaft 200 rotates.
  • the first vane 35A is urged toward the first eccentric roller 33A by the first urging member (coil spring) 39A.
  • the first vane 35A abuts on the outer peripheral surface of the first eccentric roller 33A and divides the inside of the first cylinder chamber 37A into a low pressure chamber where the first suction port 41A is located and a high pressure chamber where the first discharge port 43A is located. (See FIG. 3).
  • the first suction port 41A and the first discharge port 43A are provided below the rotating shaft 200.
  • a first recess 111c is formed on the surface of the partition wall 111 on the side of the first storage chamber 113 so as to surround the boss portion 111a. Then, the opening of the first recess 111c is closed by the first closing plate 121 which is in close contact with the surface of the partition wall 111 on the side of the first storage chamber 113, whereby the first discharge sound deadening partitioned from the first storage chamber 113 is closed.
  • a chamber 45A is formed. That is, in the present embodiment, the partition wall portion 111 is provided with the first discharge muffling chamber 45A.
  • the first discharge muffling chamber 45A is a first discharge port 43A located in a high pressure chamber in the first cylinder chamber 37A of the first cylinder 31A through the first communication hole 111d formed in the partition wall portion 111 (see FIG. 3). ).
  • the second compression mechanism unit 30B has the same configuration as the first compression mechanism unit 30A. That is, the second compression mechanism unit 30B includes a second cylinder 31B, a second eccentric roller 33B, and a second vane 35B.
  • the second cylinder 31B has a second cylinder chamber 37B having a circular cross section at the center in the radial direction.
  • the second eccentric roller 33B is attached to the second eccentric portion 202 of the rotating shaft 200 located in the second cylinder chamber 37B of the second cylinder 31B.
  • the second eccentric roller 33B eccentrically rotates in the second cylinder chamber 37B of the second cylinder 31B as the rotating shaft 200 rotates.
  • the second eccentric portion 202 is provided on the rotating shaft 200 with a phase difference of about 180 ° (with a phase difference of about 180 °) with respect to the first eccentric portion 201.
  • the second vane 35B is urged toward the second eccentric roller 33B by the second urging member (coil spring) 39B.
  • the second vane 35B abuts on the outer peripheral surface of the second eccentric roller 33B and divides the inside of the second cylinder chamber 37B into a low pressure chamber where the second suction port 41B is located and a high pressure chamber where the second discharge port 43B is located. (See FIG. 4).
  • the second suction port 41B and the second discharge port 43B are provided below the rotation shaft 200, like the first suction port 41A and the first discharge port 43A.
  • a second shaft hole 47a is formed in the radial center portion of the discharge muffling chamber forming member 47.
  • the rear end portion of the rotating shaft 200 and its vicinity are rotatably inserted into the second shaft hole 47a. That is, the rotary shaft 200 is rotatably supported by the first shaft hole 111b formed in the partition wall 111 and the second shaft hole 47a formed in the discharge muffling chamber forming member 47, and these first shaft holes are rotatably supported.
  • 111b and the second shaft hole 47a each form a bearing portion of the rotating shaft 200.
  • a minute gap is formed between the inner peripheral surface of the second shaft hole 47a and the outer peripheral surface of the rotating shaft 200.
  • a second recess 47b is formed on the surface of the discharge sound deadening chamber forming member 47 opposite to the second cylinder 31B side (that is, the rear surface) so as to surround the second shaft hole 47a. ..
  • the second discharge muffling chamber 45B is formed by closing the second recess 47b with the second closing plate 49 which is in close contact with the surface of the discharge muffling chamber forming member 47 on the side opposite to the second cylinder 31B. ..
  • the second discharge muffling chamber 45B is connected to the second discharge port 43B located in the high pressure chamber in the second cylinder chamber 37B of the second cylinder 31B via the second communication hole 47c formed in the discharge muffling chamber forming member 47. Communicating.
  • the first closing plate 121, the first cylinder 31A, the intermediate partition plate 40, the second cylinder 31B, the discharge sound deadening chamber forming member 47, and the second closing plate 49 are a plurality of fastening members (for example, through). It is fastened by a bolt) 60 and fixed to the partition wall 111.
  • the compression mechanism portion 30 (first compression mechanism portion 30A, second compression mechanism portion 30B) is attached to and fixed to the partition wall portion 111.
  • FIG. 5 is a sectional view taken along the line CC of FIG. 3
  • FIG. 6 is a sectional view taken along the line DD of FIG. 5
  • FIG. 7 is a sectional view taken along the line EE of FIG.
  • the first discharge muffling chamber 45A and the second discharge muffling chamber 45B communicate with each other via a discharge communication passage 51 provided above the rotating shaft 200.
  • the discharge communication passage 51 forms the bottom wall portion of the first recess 111c forming the first discharge muffling chamber 45A, the first cylinder 31A, the intermediate partition plate 40, the second cylinder 31B, and the second discharge muffling chamber 45B. It is formed as a passage extending horizontally through the bottom wall portion of the second recess 47b.
  • the second discharge muffling chamber 45B communicates with the second accommodation chamber 115 via a discharge hole 53 formed in the second closing plate 49 (see FIGS. 5 and 6).
  • the first suction passage 55 extends from the first suction port 41A in the first cylinder 31A downward in the circumferential direction, and then horizontally extends in the vicinity of the bottom portion in the housing 110 in the partition wall portion 111 and the first closing plate 121. Is formed as a passage leading to the first accommodation chamber 113 (see FIGS. 2, 3, 5, and 7).
  • the opening end portion (entrance side end portion) 55a of the first suction passage 55 that opens to the first accommodation chamber 113 is located vertically below the first shaft hole 111b (see FIG. 7).
  • the second suction port 41B located in the low pressure chamber in the second cylinder chamber 37B of the second cylinder 31B extends from the second suction port 41B in the second cylinder 31B downward in the circumferential direction and then horizontally as an intermediate partition plate 40.
  • each slide of the bearing portion (first shaft hole 111b, second shaft hole 47a) and the compression mechanism portion 30 (first compression mechanism portion 30A, second compression mechanism portion 30B) of the rotating shaft 200 It has an oil supply passage 70 for supplying lubricating oil to the moving portion.
  • the oil supply passage 70 includes a first oil passage 71 formed inside the second closing plate 49, and a second oil passage 72 extending inside the rotating shaft 200 in the axial direction of the rotating shaft 200. Includes first to fourth oil guide holes 73 to 76 extending radially inside the rotating shaft 200 (see FIGS. 1, 2 and 6).
  • the first oil passage 71 opens to the bottom of the second closing plate 49 and extends upward, and then bends toward the rear end surface of the rotating shaft 200, and the other end (upper end) is the second shaft hole. It is formed as a passage that opens in 47a.
  • the first oil passage 71 has a vertical hole extending vertically from the bottom of the second closing plate 49 to a position corresponding to the rotation shaft 200, and a discharge muffling chamber of the second closing plate 49. It is composed of a horizontal hole extending horizontally from a portion of the surface on the member 47 side corresponding to the second shaft hole 47a and connecting to the vertical hole.
  • the one end (lower end) of the first oil passage 71 that is, the opening of the vertical hole is the lubricating oil stored in the vicinity of the bottom of the second storage chamber 115, more specifically, in the bottom of the second storage chamber 115. It is located below the liquid level of O and functions as an oil suction port.
  • One end of the second oil passage 72 opens to the rear end surface of the rotating shaft 200, and the position inside the rotating shaft 200 exceeds the first cylinder 31A along the axis of the rotating shaft 200 (in other words, the first shaft hole). It extends to a position corresponding to the inside of 111b) and the other end is closed.
  • the one end of the second oil passage 72 is connected to the other end (upper end) of the first oil passage 71, and the first oil passage 71 and the second oil passage 72 form one passage.
  • the second oil passage 72 corresponds to the "passage in the rotating shaft" of the present invention.
  • One end of the first oil guide hole 73 opens in the second oil passage 72 and the other end extends radially in the rotary shaft 200 and the other end opens in the outer peripheral surface of the rotary shaft 200 located in the second shaft hole 47a.
  • the other end of the first oil guide hole 73 is open to the outer peripheral surface of the rotating shaft 200 located at a portion adjacent to the second cylinder 31B in the second shaft hole 47a.
  • the first oil guide hole 73 communicates with the second oil passage 72 and a minute gap formed between the outer peripheral surface of the rotating shaft 200 and the inner peripheral surface of the second shaft hole 47a.
  • the portion where the other end of the first oil guide hole 73 opens is slightly reduced in diameter as compared with the other portions. Functions as a lubricating oil reservoir.
  • One end of the second oil guide hole 74 opens in the second oil passage 72 and extends radially inside the rotating shaft 200, and the other end opens on the outer peripheral surface of the second eccentric portion 202 of the rotating shaft 200.
  • the portion where the other end of the second oil guide hole 74 opens is a flat surface, and the outer peripheral surface of the second eccentric portion 202 and the second eccentric roller 33B A minute gap is formed between the inner peripheral surface of the surface and the inner peripheral surface of the surface. That is, the second oil guide hole 74 communicates the second oil passage 72 with the minute gap formed between the outer peripheral surface of the second eccentric portion 202 and the inner peripheral surface of the second eccentric roller 33B.
  • One end of the third oil guide hole 75 opens in the second oil passage 72 and extends radially inside the rotating shaft 200, and the other end opens on the outer peripheral surface of the first eccentric portion 201 of the rotating shaft 200.
  • the portion of the outer peripheral surface of the first eccentric portion 201 where the other end of the third oil guide hole 75 opens is a flat surface, and the first eccentric roller 33A A slight gap is formed between the inner peripheral surface of the surface and the inner peripheral surface of the surface. That is, the third oil guide hole 75 communicates the second oil passage 72 with the minute gap formed between the outer peripheral surface of the first eccentric portion 201 and the inner peripheral surface of the first eccentric roller 33A.
  • One end of the fourth oil guide hole 76 opens in the second oil passage 72 and the other end extends radially in the rotary shaft 200 and the other end opens in the outer peripheral surface of the rotary shaft 200 located in the first shaft hole 111b.
  • the other end of the fourth oil guide hole 76 is open to the outer peripheral surface of the rotating shaft 200 located at a portion adjacent to the first cylinder 31A in the first shaft hole 111b.
  • the fourth oil guide hole 76 communicates the second oil passage 72 with the minute gap CL formed between the outer peripheral surface of the rotating shaft 200 and the inner peripheral surface of the first shaft hole 111b. ing.
  • the portion where the other end of the fourth oil guide hole 76 opens is slightly reduced in diameter as compared with the other portions. Functions as a lubricating oil reservoir.
  • the fourth oil guide hole 76 corresponds to the "communication hole" of the present invention.
  • FIG. 8 shows the flow of the refrigerant (gas) in the electric compressor 100
  • FIG. 9 shows the flow of the lubricating oil O in the electric compressor 100.
  • the low-pressure side refrigerant (low-pressure refrigerant) of the external refrigerant circuit flows into the first storage chamber 113 that houses the electric motor unit 10 through the suction port 117 formed in the front housing 110b. That is, the first storage chamber 113 constitutes a "suction chamber" in which the low-pressure refrigerant flows in from the outside, and the pressure of the first storage chamber 113 is substantially the same as the pressure on the low-pressure side of the external refrigerant circuit.
  • the rotating shaft 200 rotates, the first eccentric roller 33A rotates eccentrically in the first cylinder chamber 37A of the first compression mechanism unit 30A, and the second cylinder of the second compression mechanism unit 30B. In the chamber 37B, the second eccentric roller 33B rotates eccentrically.
  • the low-pressure refrigerant that has flowed into the first storage chamber 113 from the suction port 117 passes through the gap between the stator 11 and the rotor 12 in the electric motor unit 10, whereby the electric motor unit 10 is moved. It is cooled. Then, the low-pressure refrigerant that has passed through the first suction passage 55 and the first suction port 41A (see FIG. 3) is sucked into the first cylinder chamber 37A from the first storage chamber 113, and the first suction passage 55 is sucked from the first storage chamber 113. , The low-pressure refrigerant that has passed through the second suction passage 56 and the second suction port 41B is sucked into the second cylinder chamber 37B. At this time, the lubricating oil O stored in the bottom of the first storage chamber 113 is also sucked into the first cylinder chamber 37A and the second cylinder chamber 37B together with the low-pressure refrigerant (see FIG. 9).
  • the low-pressure refrigerant sucked into the first cylinder chamber 37A is compressed in the first cylinder chamber 37A by the eccentric rotation of the first eccentric roller 33A to become a high-pressure refrigerant.
  • the high-pressure refrigerant is discharged from the first cylinder chamber 37A to the first discharge muffling chamber 45A through the first discharge port 43A (see FIG. 3) and the first communication hole 111d, as indicated by the arrows opened in FIG. After that, it passes through the discharge communication passage 51 and flows into the second discharge muffling chamber 45B.
  • the low-pressure refrigerant that has flowed into the second cylinder chamber 37B is compressed in the second cylinder chamber 37B by the eccentric rotation of the second eccentric roller 33B to become a high-pressure refrigerant, and the high-pressure refrigerant is discharged from the second cylinder chamber 37B to the second discharge port 43B ( (See FIG. 4) and the second discharge muffling chamber 45B is discharged through the second communication hole 47c.
  • the second storage chamber 115 constitutes a "discharge chamber" in which the high-pressure refrigerant compressed by the compression mechanism unit 30 is discharged, and the pressure of the second storage chamber 115 is the pressure of the high-pressure refrigerant (the external refrigerant). It is almost the same as the pressure on the high voltage side of the circuit (higher than the pressure in the first accommodation chamber 113).
  • the high-pressure refrigerant discharged into the second storage chamber 115 contacts and / or collides with the inner surface of the housing 110 or the like, whereby the lubricating oil O contained therein is separated from the high-pressure refrigerant.
  • the lubricating oil O separated from the high-pressure refrigerant moves downward mainly by gravity and is stored in the bottom of the second storage chamber 115.
  • the high-pressure refrigerant after the lubricating oil O is separated flows out to the high-pressure side of the external refrigerant circuit through the discharge port 119 formed in the rear housing 110c.
  • the oil supply passage 70 has a first oil passage 71 formed inside the second closing plate 49 and a second oil passage 71 extending inside the rotating shaft 200 in the axial direction of the rotating shaft 200. It includes an oil passage 72 and first to fourth oil guide holes 73 to 76 extending radially inside the rotating shaft 200.
  • One end (lower end) of the first oil passage 71 constituting one end of the oil supply passage 70 is a lubricating oil O stored in the second storage chamber 115, more specifically, in the bottom of the second storage chamber 115.
  • the fourth oil guide hole 76 forming the other end of the oil supply passage 70 is more specifically formed on the outer peripheral surface of the rotating shaft 200 and the first shaft hole 111b via the first shaft hole 111b. It communicates with the first storage chamber 113 via a minute gap CL formed between the inner peripheral surface and the inner peripheral surface.
  • the first storage chamber 113 constitutes a low-pressure chamber whose pressure is equivalent to that of the low-pressure refrigerant
  • the second storage chamber 115 constitutes a high-pressure chamber whose pressure is equivalent to that of the high-pressure refrigerant.
  • the pressure difference between the second accommodation chamber (discharge chamber (high pressure chamber)) 115 and the first accommodation chamber (suction chamber (low pressure chamber)) 113 causes the second accommodation chamber.
  • the lubricating oil O stored in the bottom of the 115 is sucked up through the first oil passage 71 and guided to the second oil passage 72.
  • the lubricating oil O guided to the second oil passage 72 passes through the fourth oil guide hole 76 to the first shaft hole 111b (bearing portion of the rotating shaft 200 located between the electric motor portion 10 and the compression mechanism portion 30). Is supplied to.
  • the lubricating oil O supplied to the first shaft hole 111b passes through the minute gap CL formed between the inner peripheral surface of the first shaft hole 111b and the outer peripheral surface of the rotating shaft 200 and enters the first storage chamber 113. leak.
  • the lubricating oil O that has flowed out to the first storage chamber 113 subsequently falls and is stored in the bottom of the first storage chamber 113, or is the first of the first compression mechanism unit 30A together with the low-pressure refrigerant in the first storage chamber 113. It is sucked into the second cylinder chamber 37B of the cylinder chamber 37A and the second compression mechanism unit 30B.
  • the lubricating oil O guided to the second oil passage 72 is supplied to the second shaft hole 47a (bearing portion of the rotating shaft 200 on the rear end side) via the first oil guide hole 73.
  • the lubricating oil O guided to the second oil passage 72 is guided to the inside of the second eccentric roller 33B through the second oil guide hole 74, and from there to each sliding portion of the second compression mechanism portion 30B. Supplied.
  • the lubricating oil O guided to the second oil passage 72 is guided to the inside of the first eccentric roller 33A through the third oil guide hole 75, and from there, each sliding portion of the first compression mechanism portion 30A. Is supplied to.
  • the inside of the housing 110 is divided into a first storage chamber 113 for accommodating the electric motor unit 10 and a second storage chamber 115 for accommodating the compression mechanism unit 30 by the partition wall portion 111.
  • the bottom of the second accommodating chamber 115 constitutes a lubricating oil storage portion for accommodating the lubricating oil O, and the lubricating oil O is placed between the first accommodating chamber 113 and the second accommodating chamber 115 in the partition wall portion 111.
  • the lubricating oil O hardly flows from the second storage chamber 115 into the first storage chamber 113, and a sufficient amount of the lubricating oil O is provided on the compression mechanism portion 30 side. Can be secured. Further, since there is almost no lubricating oil O that is agitated by the rotation of the electric motor unit 10, the amount of lubricating oil that flows out from the electric compressor 100 to the external refrigerant circuit together with the high-pressure refrigerant is also significantly reduced. Therefore, the lubricity and sealing property of the compression mechanism portion 30 can be ensured with a smaller amount of lubricating oil than in the past.
  • the partition wall portion 111 is integrally formed (provided) with the housing 110 (center housing 110a) by, for example, casting or welding. Therefore, it is not necessary to mount the partition wall 111 in the housing 110 when manufacturing the electric compressor 100, and the compression mechanism section 30 is stably and accurately mounted in the housing 110 by using the partition wall 111. It is also possible. Therefore, good assembly workability of the electric compressor 100 can be obtained.
  • the pressure of the second accommodation chamber 115 is higher than the pressure of the first accommodation chamber 113, and the oil supply passage 70 uses the pressure difference between the second accommodation chamber 115 and the first accommodation chamber 113 to perform the second accommodation. It is configured to suck up the lubricating oil O stored in the chamber 115 and supply it to the first shaft hole 111b (the bearing portion of the rotating shaft 200 located between the electric motor portion 10 and the compression mechanism portion 30). Therefore, during the operation of the electric compressor 100, lubrication to the first shaft hole 111b can be performed stably and reliably.
  • the first accommodation chamber 113 is configured as a suction chamber (low pressure chamber) in which a low-pressure refrigerant from the outside flows in through the suction port 117
  • the second accommodation chamber 115 is a compression mechanism unit 30. It is configured as a discharge chamber (high pressure chamber) in which the compressed high-pressure refrigerant is discharged. Therefore, the pressure difference becomes larger, and the first shaft hole 111b can be sufficiently refueled.
  • the suction passage (first suction) that guides the low-pressure refrigerant in the first storage chamber 113 to the compression mechanism section 30 (first compression mechanism section 30A, second compression mechanism section 30B).
  • the passage 55 and the second suction passage 56) are arranged below the rotation shaft 200. Therefore, the lubricating oil O stored in the bottom of the first storage chamber 113 can be sucked into the compression mechanism unit 30 together with the low-pressure refrigerant. Therefore, it is possible to prevent the lubricating oil O from staying in (the bottom portion of) the first storage chamber 113, and to secure a sufficient amount of the lubricating oil O on the compression mechanism portion 30 side.
  • the open end portion of the suction passage (open end portion 55a of the first suction passage 55) that opens into the first storage chamber 113 is located vertically below the first shaft hole 111b. Therefore, the lubricating oil O that has fallen after passing through the first shaft hole 111b and flowing into the first storage chamber 113 can be quickly sucked into the compression mechanism unit 30.
  • the suction port 117 is provided on the opposite side of the partition wall portion 111 with the electric motor portion 10 interposed therebetween and at a height position corresponding to the rotation shaft 200. Therefore, the low-pressure refrigerant flowing from the suction port 117 into the first storage chamber 113 can be used in a well-balanced manner for cooling the electric motor unit 10 and suppressing the retention of the lubricating oil O in the first storage chamber 113.
  • the outer peripheral surface of the rotating shaft 200 and the outer peripheral surface of the rotating shaft 200 are located on the inner peripheral surface of the first shaft hole 111b or on the outer peripheral surface of the rotating shaft 200 located in the first shaft hole 111b.
  • a spiral groove may be formed to move the lubricating oil O located between the inner peripheral surface and the lubricating oil O from the first storage chamber 113 side to the second storage chamber 115 side.
  • the first storage chamber 113 is configured as a suction chamber (low pressure chamber) into which the low pressure refrigerant flows from the outside, and the second storage chamber 115 contains the high pressure refrigerant compressed by the compression mechanism unit 30. It is configured as a discharge chamber (high pressure chamber) for discharge.
  • the pressure is not limited to this, and the pressure in the second storage chamber 115 may be higher than the pressure in the first storage chamber 113.
  • front housing, 110c ... rear housing, 111 ... partition wall portion, 111a ... boss portion, 111b ... first shaft hole (bearing portion), 113 ... first accommodation chamber, 115 ... second accommodation chamber 117 ... suction port , 119 ... Discharge port, 200 ... Rotating shaft, CL ... Micro gap, O ... Lubricating oil

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)

Abstract

L'invention concerne un compresseur électrique horizontal qui, même lorsqu'il est incliné ou similaire, peut garantir une quantité suffisante d'huile de lubrification pour une unité de mécanisme de compression et fournir suffisamment d'huile à un palier d'un arbre rotatif positionné entre l'unité de mécanisme de compression et une unité de moteur électrique. Le compresseur électrique horizontal comporte : une paroi de séparation (111) qui est fournie d'un seul tenant avec un boîtier (110) pour diviser l'intérieur du boîtier (110) en une première chambre de réception (113) et une seconde chambre de réception (115), la première chambre de réception logeant une unité de moteur électrique (10) qui fait tourner un arbre rotatif (200) et la seconde chambre de réception logeant une unité de mécanisme de compression (30) entraîné par l'arbre rotatif (200) et ayant une pression supérieure à celle de la première chambre de réception (113); et un passage d'alimentation en huile (70) conçu pour utiliser la différence de pression entre la seconde chambre de réception (115) et la première chambre de réception (113) pour fournir de l'huile lubrifiante O stockée dans la seconde chambre de réception (115) à un premier trou d'arbre (111b), qui est un palier de l'arbre rotatif (200) et est positionné entre l'unité de moteur électrique (10) et l'unité de mécanisme de compression (30).
PCT/JP2020/031582 2019-09-09 2020-08-21 Compresseur électrique horizontal WO2021049273A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2019-163786 2019-09-09
JP2019163786A JP2021042687A (ja) 2019-09-09 2019-09-09 横置型電動圧縮機

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WO2021049273A1 true WO2021049273A1 (fr) 2021-03-18

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110332114A (zh) * 2019-06-10 2019-10-15 珠海格力节能环保制冷技术研究中心有限公司 一种压缩机泵体结构、装配方法及转子压缩机

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4833042B1 (fr) * 1967-03-23 1973-10-11
JPH036092U (fr) * 1989-06-06 1991-01-22
JP2006177214A (ja) * 2004-12-21 2006-07-06 Mitsubishi Heavy Ind Ltd 電動圧縮機
JP2018127980A (ja) * 2017-02-09 2018-08-16 株式会社豊田自動織機 電動圧縮機

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4833042B1 (fr) * 1967-03-23 1973-10-11
JPH036092U (fr) * 1989-06-06 1991-01-22
JP2006177214A (ja) * 2004-12-21 2006-07-06 Mitsubishi Heavy Ind Ltd 電動圧縮機
JP2018127980A (ja) * 2017-02-09 2018-08-16 株式会社豊田自動織機 電動圧縮機

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110332114A (zh) * 2019-06-10 2019-10-15 珠海格力节能环保制冷技术研究中心有限公司 一种压缩机泵体结构、装配方法及转子压缩机

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