WO2017101537A1 - 变容气缸的滑片控制结构、变容气缸及变容压缩机 - Google Patents

变容气缸的滑片控制结构、变容气缸及变容压缩机 Download PDF

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Publication number
WO2017101537A1
WO2017101537A1 PCT/CN2016/099111 CN2016099111W WO2017101537A1 WO 2017101537 A1 WO2017101537 A1 WO 2017101537A1 CN 2016099111 W CN2016099111 W CN 2016099111W WO 2017101537 A1 WO2017101537 A1 WO 2017101537A1
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Prior art keywords
pin
hole
control structure
variable
cylinder
Prior art date
Application number
PCT/CN2016/099111
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English (en)
French (fr)
Chinese (zh)
Inventor
黄辉
胡余生
魏会军
余冰
杨欧翔
王珺
苗朋柯
王明华
Original Assignee
珠海格力节能环保制冷技术研究中心有限公司
珠海凌达压缩机有限公司
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Application filed by 珠海格力节能环保制冷技术研究中心有限公司, 珠海凌达压缩机有限公司 filed Critical 珠海格力节能环保制冷技术研究中心有限公司
Priority to KR1020187016208A priority Critical patent/KR102029610B1/ko
Priority to JP2018527862A priority patent/JP6609051B2/ja
Priority to EP16874597.4A priority patent/EP3392507B1/en
Publication of WO2017101537A1 publication Critical patent/WO2017101537A1/zh

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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
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/30—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C18/34—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members
    • F04C18/356—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the outer member
    • F04C18/3562—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the outer member the inner and outer member being in contact along one line or continuous surfaces substantially parallel to the axis of rotation
    • 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
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/30—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C18/34—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members
    • F04C18/356—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the outer member
    • F04C18/3562—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the outer member the inner and outer member being in contact along one line or continuous surfaces substantially parallel to the axis of rotation
    • F04C18/3564—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the outer member the inner and outer member being in contact along one line or continuous surfaces substantially parallel to the axis of rotation the surfaces of the inner and outer member, forming the working space, being surfaces of revolution
    • 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
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/30—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C18/34—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members
    • F04C18/356—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the outer member
    • 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
    • F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
    • F04C23/001—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids of similar working principle
    • 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
    • F04C27/00—Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids
    • F04C27/005—Axial sealings for working fluid
    • 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
    • F04C27/00—Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids
    • F04C27/008—Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids for other than working fluid, i.e. the sealing arrangements are not between working chambers of the machine
    • 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
    • F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
    • F04C28/06—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids specially adapted for stopping, starting, idling or no-load operation
    • 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
    • F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
    • F04C28/06—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids specially adapted for stopping, starting, idling or no-load operation
    • F04C28/065—Capacity control using a multiplicity of units or pumping capacities, e.g. multiple chambers, individually switchable or controllable
    • 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
    • F04C2270/00—Control; Monitoring or safety arrangements
    • F04C2270/18—Pressure
    • F04C2270/185—Controlled or regulated

Definitions

  • the present invention relates to the field of compressor technology, and in particular to a slide control structure for a variable displacement cylinder and a variable displacement cylinder and a variable displacement compressor provided with such a slide control structure.
  • the common structure of the existing variable displacement compressor is that the compressor main body includes a main cylinder and a variable capacity cylinder, and the variable capacity cylinder can selectively work or not, thereby realizing the change of the working displacement to adapt to different load requirements of the refrigeration system.
  • the existing variable-capacity cylinders usually adopt a so-called pin-slide switching mode: the sliding piece, the cylinder and the bearings and the spacers covering the two ends of the cylinder form a closed cavity at the tail of the sliding piece, and the closed cavity can be selectively opened.
  • a pin locking/unlocking device is arranged on the side of the sliding piece, the device is composed of a pin hole, a pin, a spring, etc., wherein the head of the pin communicates with the closed cavity, and the tail of the pin passes through the low pressure channel A low pressure is introduced and the pin has a pre-acting force approaching the slide by a physical device such as a spring, a magnet or the like.
  • the disadvantage of the above method is that when the variable capacity cylinder is required to operate normally, high-pressure refrigerant gas needs to be introduced into the closed cavity, and the high-pressure refrigerant gas causes the refrigeration oil in the closed cavity to be discharged; and in order to ensure that the pin is in the pin hole The inside can slide up and down, there is a certain gap between the pin and the pin hole, so that the lubricating oil gap sealing cannot be realized; in addition, the viscosity of the refrigerant is much smaller than that of the lubricating oil, and the gap leakage speed is fast.
  • the prior art solution has the following harmful effects: the refrigerant leaking from the closed cavity to the air inlet of the variable volume cylinder through the side clearance of the pin will be significantly increased, resulting in a decrease in the volumetric efficiency of the variable volume cylinder and a decrease in performance;
  • the compressor refrigeration/heating capacity fluctuates significantly, which is not conducive to controlling the quality stability of compressors and air conditioners.
  • the present invention provides a guarantee for at least partially solving the above technical problems.
  • a slide control structure for a variable displacement cylinder comprising:
  • a pin disposed on a lower side of the slider, the pin having a first position capable of locking the slider and a second position capable of being disengaged from the slider;
  • a low pressure passage is disposed below the pin
  • a face seal structure is disposed between the pin and the low pressure passage, and when the pin is in the second position, a face seal is formed at the lower end of the pin. .
  • the pin is disposed in a pin hole, the pin hole is a stepped hole, and an inner diameter of a portion of the pin hole near the lower end is smaller than an inner diameter of a portion of the upper side, such that a portion near the lower end of the pin hole is formed a stepped surface extending inward in the radial direction.
  • a gasket is disposed on the stepped surface, and a lower end of the pin is tightly pressed against an upper surface of the gasket between a lower end of the pin and an upper surface of the gasket The face seal is formed.
  • a through hole is formed in the middle of the gasket.
  • a sealing partition is disposed on a lower side of the pin, the lower end of the pin being capable of abutting against an upper surface of the sealing partition, at a lower end of the pin and an upper surface of the sealing partition The face seal is formed between them.
  • a lower portion of the pin is provided with a groove, and a first through hole is provided at a position corresponding to the groove on the sealing partition.
  • the maximum size of the first through hole in the horizontal plane is smaller than the maximum outer diameter of the pin
  • the maximum size of the first through hole in the horizontal plane is smaller than the maximum size of the groove on the horizontal plane.
  • a second through hole is provided in the sealing partition, and the second through hole enables the low pressure passage to communicate with an intake port of the variable displacement cylinder.
  • variable displacement cylinder provided with a slider control structure in the present application.
  • variable displacement compressor provided with a varactor gas in the present application Cylinder.
  • the sealing effect of the surface seal is far superior to the gap seal, which greatly reduces the leakage amount of the refrigerant, thereby improving the compression of the variable-capacity cylinder when it is in the working mode.
  • the efficiency of the machine optimizes the performance of the compressor; and, in the present application, since the above-mentioned surface sealing structure is provided, the sealing effect is good, which can reduce the processing precision of the pin hole, reduce the processing cost and assembly cost of the pin hole, Compressor production quality is stable.
  • FIG. 1 is a schematic structural view of a variable displacement cylinder in a variable capacity compressor in a normal working mode in the prior art
  • FIG. 2 is a schematic structural view of a variable displacement cylinder in a variable displacement compressor in an unloading mode in the prior art
  • Figure 3 is a partially enlarged cross-sectional view of the A-A section of Figure 1;
  • Figure 4 is a schematic structural view of a preferred embodiment of the present invention (corresponding to the portion shown in Figure 3);
  • FIG 5 is a schematic view showing the structure of another preferred embodiment of the present invention (corresponding to the portion shown in Figure 3).
  • the pump assembly of the variable capacity compressor includes a crankshaft 1, and an upper bearing 4, a lower bearing 5, a cover plate 7 connected to the crankshaft 1, and sandwiched between the upper bearing 4 and the lower bearing 5
  • the first cylinder 2 and the second cylinder 3 are spaced apart by a partition 6, wherein the second cylinder 3 is a variable volume cylinder.
  • the upper bearing 4, the first cylinder 2, the partition 6, the second cylinder 3, the lower bearing 5, and the cover plate 7 are sequentially mounted in the axial direction of the compressor crankshaft 1.
  • a first sliding vane groove is disposed in the first cylinder 2, the first sliding vane 10 is disposed in the first sliding vane slot, and the first sliding vane 10 is disposed on the back thereof
  • the spring force of the spring is pressed against the first rolling piston 8, and the first sliding plate 10 is in contact with the outer surface of the first rolling piston 8, thereby separating the inner cavity of the first cylinder 2 into an intake chamber and a compression chamber.
  • a second vane slot is disposed in the second cylinder 3, and the second vane is disposed in the second vane slot on the back of the second vane 11 (located on the right side of the second vane 11 in FIG.
  • One side) is formed with a closed cavity 18, and a pressure switching tube 12 is disposed on the closed cavity 18, and the pressure switching tube 12 can be connected to an external air source (not shown), and the external air source is preferably It may be a high pressure/low pressure gas from the compressor outlet/suction port.
  • the pressure switching tube 12 can be connected to an external air source through a control valve.
  • a solenoid valve or a three-way valve or the like can be used for controlling the switching of the high/low pressure gas that is introduced into the pressure switching tube 12, thereby High pressure or low pressure gas can be introduced into the pressure switching tube 12.
  • the second sliding piece 11 When the high pressure gas is introduced into the pressure switching tube 12, the second sliding piece 11 can be pressed against the second rolling piston 9 by the pressure of the supplied gas, and the second sliding piece 11 and the second rolling piston 9 The outer surfaces are in contact to separate the inner chamber of the second cylinder 3 into an inlet chamber and a compression chamber.
  • the first rolling piston 8 and the second rolling piston 9 are fixedly mounted on the eccentric portion of the compressor crankshaft 1, and are eccentrically rotated in the cylinder under the driving of the compressor crankshaft 1, thereby performing refrigerant gas entering the cylinder cavity. compression.
  • a pin hole 17 is provided in the lower bearing 5, preferably, the axis of the pin hole 17 is parallel to the axis of the compressor crankshaft 1, and the upper end of the pin hole 17 communicates with the closed cavity 18.
  • a low pressure passage 15 (see FIG. 3) communicating with the second cylinder intake port 16 is disposed below the pin hole 17, and a portion of the low pressure passage 15 is preferably disposed on the cover plate 7.
  • a pin 13 is provided in the pin hole 17, and the pin 13 is movable up and down within the pin hole 17.
  • a biasing member 14 is provided on the underside of the pin 13, which may be a physical device such as a spring that provides an upward biasing force to the pin 13.
  • a groove 131 is provided on the lower side of the pin 13, and the biasing member 14 is disposed between the top wall of the groove and the cover plate 7 below the pin 13.
  • a pin groove 111 (see FIG. 1) capable of cooperating with the upper end of the pin 13 is correspondingly provided, when the pin 13 moves upward and the end protrudes from the lower bearing 5, The upper end portion of the pin 13 can extend into the pin groove 111 of the second slider 11 to lock the second slider 11 in the locked position (when the pin 13 is in the first position).
  • the pin 13 overcomes the pre-urging force of the biasing member 14 and the gas pressure of the low pressure passage under the action of the high pressure gas, so that the pin 13 moves downward and leaves the first portion.
  • a pin groove 111 on the second sliding piece 11 so that the pin 13 is located so that the second sliding piece 11 is not subject to The unlocking position of the bundle (the pin 13 is in the second position at this time)
  • the second sliding piece 11 is pressed against the second rolling piston 9 by the high pressure gas of the back thereof, and the second sliding piece 11 is headed and second The outer surfaces of the rolling pistons 9 are in contact to achieve a normal compression process of the second cylinder 3 (varying cylinder).
  • the high-pressure refrigerant gas enters the intake hole 16 of the second cylinder 3 via the gap between the outer wall of the pin 13 and the inner wall of the pin hole 17 and the low-pressure passage 15 below the pin 13, and the expansion of the high-pressure refrigerant gas causes the second cylinder 3
  • the actual amount of gas circulation is reduced, and the leaking gas is repeatedly compressed, which not only reduces the cooling capacity, but also consumes additional power, so that the performance of the existing variable displacement compressor when performing double cylinder operation is degraded.
  • the present invention is an improvement based on the varactor described in the above prior art, in which the variable displacement compressor slide control structure of the present invention is provided, that is, It is to be noted that the slider control structure of the present invention is applied to a variable displacement compressor having the above-described configuration and components, and the slider control structure of the variable displacement compressor of the present invention will be described in detail below, in order to avoid excessive repetition of content. The same parts as those described above will not be described again.
  • the second cylinder 103 of the variable displacement compressor is disposed above the lower bearing 105, and a cover plate 107 is disposed below the lower bearing 105.
  • a pin hole 117 formed in a stepped shape is provided in the lower bearing 105, and an inner diameter of a portion of the pin hole 117 near the lower end is smaller than an inner diameter of a portion of the upper side, such that a portion near the lower end of the pin hole 117 is formed in a radial direction.
  • a stepped surface extending inwardly, on which a gasket 109 is provided, the gasket 109 preferably However, it is not limited to a metal gasket or a rubber gasket.
  • the gasket 109 is an annular gasket and is provided with a through hole at the center.
  • a pin 113 provided with a recess 1131 on the lower side is provided in the pin hole 17, and a lower end surface of the pin 113 can abut on the upper surface of the gasket 109 on the step surface.
  • a biasing member 114 is formed in the recess 1131 of the pin 113 through a through hole in the gasket 109 and in contact with the cover plate 107, and the biasing member 114 is preferably a spring for the pin 113 provides an upward biasing force.
  • the lower end of the pin 113 communicates with the low pressure passage 115 on the cover plate 107, and further communicates with the intake hole 116 of the second cylinder 103.
  • the gasket 109 is made of metal or rubber.
  • a high-pressure refrigerant gas is introduced into a closed cavity (not shown) above the pin 113 for high-pressure cooling.
  • the pin 113 overcomes the pre-urging force of the biasing member 114 and the gas pressure in the low-pressure passage, and the pin 113 moves downward in the pin hole 117 to the second position, thereby causing the pin 113 and the seat
  • the slider of the second cylinder 103 is disengaged while the lower end of the pin 113 is tightly pressed against the upper surface of the gasket 109, and a face seal is formed at the lower end of the pin 113.
  • the second cylinder 103 performs a normal compression operation.
  • the high-pressure refrigerant gas flows downward along the gap between the pin 113 and the pin hole 117, but since the lower end of the pin 113 is tightly pressed against the gasket 109, at the stepped surface of the pin 113 and the pin hole 17
  • a face seal structure is formed to form a face seal between the gap between the pin 113 and the pin hole 117 and the low pressure passage 115 on the lower side of the pin 113.
  • the sealing performance of the face sealing structure is far superior to the gap seal between the pin 113 and the pin hole 117, so that the leakage amount of the refrigerant is greatly reduced, thereby effectively improving the performance of the compressor.
  • the second cylinder 203 of the variable displacement compressor is disposed above the lower bearing 205, and a sealing partition 218 and a cover plate 207 are sequentially disposed below the lower bearing 205.
  • a pin hole 217 is provided in the lower bearing 205, and a pin 213 with a groove 2131 is provided in the pin hole 217.
  • a biasing member 214 such as a spring, capable of generating a pre-energizing force is disposed between the top wall of the recess 2131 of the pin 213 and the sealing partition 218 below the pin 213.
  • a first through hole 219 is provided at a position on the seal partition 218 corresponding to the groove 2131 on the pin hole 17.
  • the maximum size of the through hole 219 in the horizontal plane is smaller than the outer diameter of the pin 213 such that the lower end of the pin 213 can abut against the upper surface of the sealing spacer 218. More preferably, the maximum size of the through hole 219 in the horizontal plane is smaller than the maximum dimension of the groove 2131 in the horizontal plane, so that the bottom of the biasing member 214 can abut against the upper surface of the sealing partition 218. .
  • the hole 219 is a circular hole, its largest dimension is its diameter.
  • a low pressure passage 215 communicating with the second cylinder intake hole 216 is disposed on the cover plate 207, preferably, in order to enable the low pressure passage 215 to communicate with the intake hole 216 of the second cylinder 203,
  • a second through hole 220 is disposed on the sealing partition 218.
  • the arrangement of the low-pressure passage 215 and the first through hole 219 and the second through hole 220 is not unique, and may have various structural forms as long as the lower side of the pin 213 and the second cylinder 203 can be
  • the air inlet hole 216 can be connected.
  • the sealing partition 218 is machined or stamped.
  • a high-pressure refrigerant gas is introduced into a closed cavity (not shown) above the pin 213.
  • the pin 213 acts against the pre-force of the biasing member and the gas pressure in the low-pressure passage, thereby moving the pin 213 downward in the pin hole 17 to the second position, thereby making the pin
  • the 213 is disengaged from the slider of the second cylinder 203, and at this time, the second cylinder 203 performs a normal compression operation.
  • the high-pressure refrigerant gas flows downward along the gap between the pin 213 and the pin hole 217, but since the bottom end surface of the pin 213 is in surface contact with the sealing spacer 218, a surface is formed at the lower end of the pin 213. Sealing, the lower end of the pin 213 is tightly pressed against the upper end surface of the sealing partition 218 under the pressure difference between the two ends, thereby forming a surface seal between the lower end of the pin 213 and the upper end surface of the sealing partition 218, the surface
  • the sealing performance of the sealing structure is far superior to the gap seal between the pin 213 and the pin hole 217, so that the leakage amount of the refrigerant is greatly reduced, thereby improving the performance of the compressor.
  • the sealing effect of the surface seal is far superior to the gap seal, which greatly reduces the leakage amount of the refrigerant, thereby improving the compression of the variable-capacity cylinder when it is in the working mode.
  • the efficiency of the machine optimizes the performance of the compressor; and, in the present application, since the above-mentioned surface sealing structure is provided, the sealing effect is good, which can reduce the processing precision of the pin hole, reduce the processing cost and assembly cost of the pin hole, Compressor production quality is stable.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Rotary Pumps (AREA)
  • Compressor (AREA)
PCT/CN2016/099111 2015-12-18 2016-09-14 变容气缸的滑片控制结构、变容气缸及变容压缩机 WO2017101537A1 (zh)

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