WO2017125048A1 - 转缸活塞压缩机的泵体及具有其的压缩机 - Google Patents

转缸活塞压缩机的泵体及具有其的压缩机 Download PDF

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Publication number
WO2017125048A1
WO2017125048A1 PCT/CN2017/071745 CN2017071745W WO2017125048A1 WO 2017125048 A1 WO2017125048 A1 WO 2017125048A1 CN 2017071745 W CN2017071745 W CN 2017071745W WO 2017125048 A1 WO2017125048 A1 WO 2017125048A1
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Prior art keywords
bearing
cylinder
pump body
compressor
liner
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PCT/CN2017/071745
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English (en)
French (fr)
Inventor
苏圣桐
史正良
杜忠诚
杨森
丁宁
张荣婷
张金圈
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珠海格力节能环保制冷技术研究中心有限公司
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Publication of WO2017125048A1 publication Critical patent/WO2017125048A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
    • F04B27/04—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B27/06—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement the cylinders being movable, e.g. rotary
    • 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
    • F04C23/02—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
    • F16C35/08—Rigid support of bearing units; Housings, e.g. caps, covers for spindles
    • F16C35/12—Rigid support of bearing units; Housings, e.g. caps, covers for spindles with ball or roller bearings
    • 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
    • F04C2240/00—Components
    • F04C2240/30—Casings or housings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2360/00—Engines or pumps
    • F16C2360/42—Pumps with cylinders or pistons

Definitions

  • the present invention relates to the field of air conditioning equipment, and in particular to a pump body of a rotary cylinder piston compressor and a compressor therewith.
  • a primary object of the present invention is to provide a pump body of a rotary cylinder piston compressor and a compressor therewith to solve the problem of serious friction between the cylinder and the cylinder liner in the prior art.
  • a pump body of a rotary cylinder piston compressor includes: a cylinder liner; a cylinder rotatably disposed in the cylinder liner, an outer circumferential surface of the cylinder and a cylinder liner The gap between the circumferences is matched.
  • bearings are mounted on both ends of the cylinder.
  • the bearing is a rolling bearing.
  • the bearing includes a first bearing, the first bearing sleeve is disposed at an end of the cylinder, the pump body further includes a first bearing seat, the first bearing seat is fixed on an end surface of the cylinder sleeve, and the first bearing seat is provided with a first The bearing mounting hole, the first bearing is installed in the first bearing mounting hole.
  • the inner diameter of the first bearing is smaller than the inner diameter of the cylinder liner; and/or the first bearing housing and the first bearing extend the same length in the axial direction of the cylinder.
  • the bearing further includes a second bearing sleeved at a lower end of the cylinder, the cylinder comprising a cylinder body and a protruding structure disposed on the cylinder body, the protruding structure being press-fitted on the inner ring of the second bearing, the protruding structure and The outer ring of the second bearing is separated.
  • the cylinder includes a cylinder body and a bearing mounting portion disposed at one end of the cylinder body, the outer diameter of the bearing mounting portion is smaller than the outer diameter of the cylinder body, the bearing further includes a second bearing, and the second bearing is sleeved on the bearing mounting portion.
  • the pump body further includes a second bearing seat, the second bearing seat is provided with a second bearing mounting hole, and the second bearing is installed in the second bearing mounting hole.
  • the length of the second bearing seat extending along the axial direction of the cylinder is greater than the length of the bearing mounting section extending along the axial direction of the cylinder; and/or the thickness of the second bearing is greater than the length of the bearing mounting section extending along the axial direction of the cylinder.
  • a protruding structure is disposed on an end surface of the cylinder body adjacent to the bearing mounting portion, and the protruding structure abuts against the inner ring of the second bearing, and the protruding structure is separated from the outer ring of the second bearing.
  • a compressor including a housing assembly and a pump body of a rotary piston compressor mounted in the housing assembly, the pump body of the rotary piston compressor being the above The pump body of the rotary piston compressor.
  • the outer peripheral wall of the cylinder and the inner peripheral wall of the cylinder liner are disposed with a gap to avoid contact between the outer peripheral wall of the cylinder and the inner peripheral wall of the cylinder liner, which is advantageous for solving the cylinder existing in the prior art. Serious friction problems with the cylinder liner.
  • FIG. 1 shows an exploded view of a pump body of a rotary cylinder piston compressor of an embodiment of the present invention
  • FIG. 2 is a cross-sectional structural view showing a pump body of a rotary cylinder piston compressor according to an embodiment of the present invention
  • Figure 3 shows an enlarged view of A in Figure 2;
  • FIG. 4 is a schematic structural view showing a second bearing housing of a pump body of a rotary cylinder piston compressor according to an embodiment of the present invention
  • Figure 5 is a view showing the structure of a second bearing of a pump body of a rotary cylinder piston compressor according to an embodiment of the present invention
  • Fig. 6 is a view showing the construction of a rotary cylinder piston compressor of an embodiment of the present invention.
  • the pump body of the rotary cylinder piston compressor of the present embodiment includes a cylinder liner 10 and a cylinder 20 rotatably disposed in the cylinder liner 10, the outer peripheral surface of the cylinder 20 and the inner portion of the cylinder liner 10.
  • the gap between the circumferences is matched.
  • the cylinder 20 and the cylinder liner 10 are connected by a bearing 30.
  • the cylinder 20 is mounted in the cylinder liner 10 through the bearing 30, and the outer diameter of the cylinder 20 is smaller than the inner diameter of the cylinder liner 10 to form a gap between the outer circumferential surface of the cylinder 20 and the inner circumferential surface of the cylinder liner 10, and the cylinder 20 is
  • the sliding friction change between the cylinder liners 10 is coordinated by the bearings 30, reducing the wear of the cylinders 20 and the cylinder liner 10.
  • the pump body of the rotary cylinder piston compressor further includes a piston 60 disposed within the cylinder 20 and a drive shaft 80 coupled to the piston 60.
  • Both the cylinder 20 and the cylinder liner 10 are located between the upper flange 71 and the lower flange 72.
  • Bearings 30 are mounted on both ends of the cylinder 20.
  • the bearing 30 mounted at both ends of the cylinder 20 functions to carry the cylinder 20, avoiding friction between the cylinder 20 and other components such as the cylinder liner 10.
  • the bearing 30 is a rolling bearing.
  • the rotation of the cylinder 20 is smoother, which is advantageous for improving the working efficiency of the compressor.
  • the bearing 30 includes a first bearing 31, and the first bearing 31 is sleeved at the end of the cylinder 20.
  • the pump body further includes a first bearing housing 40, and the first bearing housing 40 is fixed to the end surface of the cylinder liner 10.
  • the first bearing housing 40 is provided with a first bearing mounting hole, and the first bearing 31 is mounted in the first bearing mounting hole.
  • the inner diameter of the first bearing 31 is smaller than the inner diameter of the cylinder liner 10; the length of the first bearing housing 40 and the first bearing 31 extending in the axial direction of the cylinder 20 is the same.
  • the cylinder 20 includes a cylinder body 21 and a bearing mounting portion 22 disposed at one end of the cylinder body 21, the outer diameter of the bearing mounting portion 22 is smaller than the outer diameter of the cylinder body 21, and the bearing 30 further includes a second bearing. 32, the second bearing 32 is sleeved on the bearing mounting section 22, the pump body further includes a second bearing housing 50, the second bearing housing 50 is provided with a second bearing mounting hole, and the second bearing 32 is mounted on the second bearing mounting hole Inside.
  • FIG. 4 is a schematic view showing the structure of the second bearing housing 50 of the present embodiment
  • FIG. 5 is a schematic view showing the structure of the second bearing 32 of the present embodiment.
  • the length of the second bearing housing 50 extending in the axial direction of the cylinder 20 is greater than the length of the bearing mounting section 22 extending in the axial direction of the cylinder 20.
  • the end face of the cylinder 20 is separated from the lower flange 72 provided below the cylinder 20 to avoid friction between the two.
  • the thickness of the second bearing 32 is greater than the length of the bearing mounting section 22 that extends along the axial direction of the cylinder 20.
  • a projecting structure 23 is provided on the end face of the cylinder body 21 close to the bearing mounting section.
  • the projecting structure 23 abuts against the inner ring 321 of the second bearing 32, and the projecting structure 23 is separated from the outer ring 322 of the second bearing 32.
  • the end surface of the protruding structure 23 away from the cylinder body 21 forms a thrust surface, the thrust surface abuts against the inner ring 321 of the second bearing 32, the cylinder 20 is entirely carried by the bearing 30, and the rotation of the cylinder 20 is realized by the bearing 30, which is advantageous for Improve the smoothness of the rotation of the cylinder 20.
  • the bearing 30 further includes a second bearing 32 sleeved at a lower end of the cylinder 20, the cylinder 20 including a cylinder body 21 and a protruding structure 23 disposed on the cylinder body 21, the protruding structure 23 is press-fitted on the inner ring 321 of the second bearing 32, and the protruding structure 23 is disposed apart from the outer ring 322 of the second bearing 32.
  • the protruding structure 23 is disposed on the circumferential surface of the cylinder and located at the lower end of the cylinder body 21, the second bearing 32 is sleeved on the circumferential surface of the cylinder 20, and the protruding structure 23 is press-fitted in the second bearing 32.
  • the ring 321 is spaced apart from the outer ring 322 of the second bearing 32.
  • the protruding structure 23 applies the weight of the cylinder 20 to the inner ring 321 of the second bearing 32.
  • the cylinder 20 is entirely carried by the bearing 30, and the rotation of the cylinder 20 is realized by the bearing 30, which is advantageous for improving the smoothness of the rotation of the cylinder 20.
  • the embodiment further discloses a compressor including a housing assembly 2 and a pump body 4 mounted on a rotary piston compressor of the housing assembly 2, the rotary piston compressor
  • the pump body is the pump body of the above-described rotary cylinder piston compressor.
  • FIG. 6 is a schematic structural view of the compressor of the present embodiment, the compressor further including an upper casing assembly 1 disposed above the casing assembly 2 and a lower casing assembly 5 disposed below the casing assembly 2, the upper casing assembly 1.
  • the housing assembly 2 and the lower housing assembly 5 form a closed housing.
  • the housing is further provided with a motor assembly 3 that drives a piston 60 disposed in the cylinder 20 through a drive shaft 80 to complete compression of the refrigerant. .
  • the compressor of this embodiment further includes a dispenser member 6 located outside of the housing.
  • the pump body structure of the rotary piston compressor of the present embodiment is mainly composed of a drive shaft 80, an upper flange 71, a lower flange 72, a cylinder 20, a cylinder liner 10, a piston 60, and a first
  • the bearing housing 40, the first bearing 31 above the cylinder, the limiting plate, the second bearing 32 and the corresponding connecting screw are composed.
  • First bearing 31 structural embodiment on the basis of the pump body of a conventional rotary cylinder piston compressor, the height of the cylinder liner 10 is reduced. A first bearing housing 40 is added to the cylinder liner 10, and a rolling bearing is disposed in the first bearing housing 40.
  • the total height of the first bearing housing 40 of the cylinder liner 10 of the embodiment is equal to the height of the original cylinder sleeve
  • the height of the first bearing housing 40 is equal to that of the first bearing 31
  • the inner diameter of the inner ring of the first bearing 31 is slightly smaller than the cylinder liner.
  • the outer circumference of the cylinder 20 is in a transitional fit with the inner circle of the first bearing 31 and is not in contact with the inner circumference of the cylinder liner 10, so there is no direct frictional wear between the cylinder and the cylinder liner during operation of the compressor.
  • the above bearing mounting section 22 is a cylinder short shaft, and the diameter of the inner circle of the limiting plate is increased to form the second bearing housing 50 described above.
  • the rolling bearing is placed therein, and the position of the limiting plate is equivalent to the bearing seat.
  • the limiting plate is equal to the second bearing 32 and higher than the length of the short axis of the cylinder; the outer diameter of the inner ring of the second bearing 32 is greater than or equal to the outer diameter of the lower thrust surface of the cylinder.
  • the outer ring of the second bearing 32 and the limiting plate, the inner ring of the bearing and the short axis of the cylinder are all in a transitional fit, and the thrust surface of the cylinder is in close contact with the upper plane of the inner ring of the bearing under the action of gravity and other forces.
  • the other parts are roughly the same as conventional rotary cylinder piston compressors.
  • the pump body is assembled by screwing the lower flange 72, the limiting plate and the cylinder liner 10, and pressing the second bearing 32 into the limiting plate; loading the piston 60 into the cylinder 20, and then arranging the cylinder 20
  • the cylinder liner 10 presses the cylinder short shaft into the inner circumference of the second bearing; the first bearing 31 and the first bearing housing 40 are mounted on the cylinder 20; the drive shaft 80 and the upper flange 71 are mounted to complete the assembly of the entire pump body.
  • the embodiment can effectively reduce the wear between the cylinder and the cylinder liner, between the cylinder short shaft and the lower thrust surface and the limiting plate, thereby improving the reliability of the working of the compressor pump body; Reducing the friction loss of the above parts to the compressor, and improving the energy efficiency of the compressor.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • Compressor (AREA)

Abstract

一种转缸活塞压缩机的泵体及具有其的压缩机。转缸活塞压缩机的泵体包括：气缸套（10）；气缸（20），可转动地设置在气缸套（10）内，气缸（20）的外周面与气缸套（10）的内周面之间间隙配合。由于气缸的外周面和气缸套的内周面之间设置为具有间隙，避免气缸的外周面和气缸套的内周面之间的接触，有利于解决现有技术中存在的气缸与气缸套之间摩擦严重的问题。

Description

转缸活塞压缩机的泵体及具有其的压缩机 技术领域
本发明涉及空调设备领域，具体而言，涉及一种转缸活塞压缩机的泵体及具有其的压缩机。
背景技术
目前，转缸活塞压缩机的气缸与气缸套之间、气缸短轴与限位板之间均为滑动配合。由于气缸外圆直径及其与气缸套的接触面积都较大，在压缩机工作时，气缸与气缸套之间会产生很大的滑动摩擦；气缸短轴直径虽然较小，但因为侧向气体力的作用会使气缸短轴紧贴限位板，造成很大的正压力，滑动摩擦也十分剧烈。以上原因使得气缸在旋转的过程中会与气缸套、限位板之间产生较大的摩擦功耗，降低压缩机效率。同时，由于摩擦力较大会造成气缸、气缸套和限位板接触部位的磨损。
发明内容
本发明的主要目的在于提供一种转缸活塞压缩机的泵体及具有其的压缩机，以解决现有技术中的气缸与气缸套之间的摩擦严重的问题。
为了实现上述目的，根据本发明的一个方面，提供了一种转缸活塞压缩机的泵体，包括：气缸套；气缸，可转动地设置在气缸套内，气缸的外周面与气缸套的内周面之间间隙配合。
进一步地，气缸与气缸套之间通过轴承连接。
进一步地，气缸的两端均安装有轴承。
进一步地，轴承为滚动轴承。
进一步地，轴承包括第一轴承，第一轴承套设在气缸的端部，泵体还包括第一轴承座，第一轴承座固定在气缸套的端面上，第一轴承座上设置有第一轴承安装孔，第一轴承安装在第一轴承安装孔内。
进一步地，第一轴承的内径小于气缸套的内径；和/或，第一轴承座和第一轴承在气缸的轴向上延伸的长度相同。
进一步地，轴承还包括套设在气缸的下端的第二轴承，气缸包括气缸本体和设置在气缸本体上的凸出结构，凸出结构压设在第二轴承的内圈上，凸出结构与第二轴承的外圈分离设置。
进一步地，气缸包括气缸本体和设置在气缸本体的一端的轴承安装段，轴承安装段的外径小于气缸本体的外径，轴承还包括第二轴承，第二轴承套设在轴承安装段上，泵体还包括第二轴承座，第二轴承座上设置有第二轴承安装孔，第二轴承安装在第二轴承安装孔内。
进一步地，第二轴承座沿气缸的轴向延伸的长度大于轴承安装段沿气缸的轴向延伸的长度；和/或，第二轴承的厚度大于轴承安装段沿气缸的轴向延伸的长度。
进一步地，气缸本体的靠近轴承安装段的端面上设置有凸出结构，凸出结构与第二轴承的内圈抵接，凸出结构与第二轴承的外圈相分离。
根据本发明的另一方面，提供了一种压缩机，该压缩机包括壳体组件和安装在壳体组件内的转缸活塞压缩机的泵体，转缸活塞压缩机的泵体为上述的转缸活塞压缩机的泵体。
应用本发明的技术方案，气缸的外周壁和气缸套的内周壁之间设置为具有间隙，避免气缸的外周壁和气缸套的内周壁之间的接触，有利于解决现有技术中存在的气缸与气缸套之间的摩擦严重的问题。
附图说明
构成本申请的一部分的说明书附图用来提供对本发明的进一步理解，本发明的示意性实施例及其说明用于解释本发明，并不构成对本发明的不当限定。在附图中：
图1示出了本发明的实施例的转缸活塞压缩机的泵体的爆炸图；
图2示出了本发明的实施例的转缸活塞压缩机的泵体的剖面结构示意图；
图3示出了图2中A处的放大图；
图4示出了本发明的实施例的转缸活塞压缩机的泵体的第二轴承座的结构示意图；
图5示出了本发明的实施例的转缸活塞压缩机的泵体的第二轴承的结构示意图；
图6示出了本发明的实施例的转缸活塞压缩机的结构示意图。
其中，上述附图包括以下附图标记：
10、气缸套；20、气缸；21、气缸本体；22、轴承安装段；23、凸出结构；30、轴承；31、第一轴承；32、第二轴承；321、内圈；322、外圈；40、第一轴承座；50、第二轴承座；60、活塞；71、上法兰；72、下法兰；80、驱动轴；1、上壳组件；2、壳体组件；3、电机组件；4、泵体；5、下壳组件；6、分液器部件。
具体实施方式
需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互组合。下面将参考附图并结合实施例来详细说明本发明。
如图1和图2所示，本实施例的转缸活塞压缩机的泵体包括气缸套10和可转动地设置在气缸套10内的气缸20，气缸20的外周面与气缸套10的内周面之间间隙配合。
本实施例中，通过将气缸20的外周壁和气缸套10的内周壁之间设置为具有间隙，避免气缸20的外周壁和气缸套10的内周壁之间的接触，有利于解决现有技术中存在的气缸与气缸套之间的摩擦严重的问题。
本实施例中，气缸20与气缸套10之间通过轴承30连接。通过轴承30将气缸20安装在气缸套10内，并且气缸20的外径小于气缸套10的内径，以在气缸20的外周面与气缸套10的内周面之间形成间隙，将气缸20与气缸套10之间的滑动摩擦变化为通过轴承30配合，降低了气缸20和气缸套10的磨损。
从图1和图2还可以看出，转缸活塞压缩机的泵体还包括设置在气缸20内的活塞60和与活塞60连接的驱动轴80。气缸20和气缸套10均位于上法兰71和下法兰72之间。
气缸20的两端均安装有轴承30。安装在气缸20两端的轴承30起到承载气缸20的作用，避免气缸20与气缸套10等其它部件之间的摩擦。
可选地，轴承30为滚动轴承。减小摩擦力，气缸20的转动更加顺畅，有利于提高压缩机的工作效率。
如图2所示，轴承30包括第一轴承31，第一轴承31套设在气缸20的端部，泵体还包括第一轴承座40，第一轴承座40固定在气缸套10的端面上，第一轴承座40上设置有第一轴承安装孔，第一轴承31安装在第一轴承安装孔内。
如图2所示，在本实施例中，第一轴承31的内径小于气缸套10的内径；第一轴承座40和第一轴承31在气缸20的轴向上延伸的长度相同。
如图2和3所示，气缸20包括气缸本体21和设置在气缸本体21的一端的轴承安装段22，轴承安装段22的外径小于气缸本体21的外径，轴承30还包括第二轴承32，第二轴承32套设在轴承安装段22上，泵体还包括第二轴承座50，第二轴承座50上设置有第二轴承安装孔，第二轴承32安装在第二轴承安装孔内。
图4示出了本实施例的第二轴承座50的结构示意图，图5示出了本实施例的第二轴承32的结构示意图。
结合图2所示，第二轴承座50沿气缸20的轴向延伸的长度大于轴承安装段22沿气缸20的轴向延伸的长度。以使气缸20的端面与设置在气缸20的下方的下法兰72相分离，避免两者之间产生摩擦。
第二轴承32的厚度大于轴承安装段22沿气缸20的轴向延伸的长度。
气缸本体21的靠近轴承安装段的端面上设置有凸出结构23，凸出结构23与第二轴承32的内圈321抵接，凸出结构23与第二轴承32的外圈322相分离。
凸出结构23的远离气缸本体21的端面形成止推面，止推面与第二轴承32的内圈321抵接，气缸20整体由轴承30承载，气缸20的转动通过轴承30实现，有利于提高气缸20转动的顺畅度。
在本申请的另一实施例中，轴承30还包括套设在气缸20的下端的第二轴承32，气缸20包括气缸本体21和设置在气缸本体21的上的凸出结构23，凸出结构23压设在第二轴承32的内圈321上，凸出结构23与第二轴承32的外圈322分离设置。
可选地，凸出结构23设置在气缸的周面上且位于气缸本体21的下端，第二轴承32套设在气缸20的周面上，凸出结构23压设在第二轴承32的内圈321上，并与第二轴承32的外圈322相分离。
凸出结构23将气缸20的重量施加在第二轴承32的内圈321上，气缸20整体由轴承30承载，气缸20的转动通过轴承30实现，有利于提高气缸20转动的顺畅度。
根据本申请的另一方面，本实施例还公开了一种压缩机，压缩机包括壳体组件2和安装在壳体组件2的转缸活塞压缩机的泵体4，转缸活塞压缩机的泵体为上述的转缸活塞压缩机的泵体。
图6示出了本实施例的压缩机的结构示意图，压缩机还包括设置在壳体组件2的上方的上壳组件1和设置在壳体组件2的下方的下壳组件5，上壳组件1、壳体组件2和下壳组件5组成封闭的壳体，壳体还设置有电机组件3，电机组件3通过驱动轴80驱动设置在气缸20中的活塞60，以完成对制冷剂的压缩。
本实施例的压缩机还包括位于壳体外的分液器部件6。
由以上叙述可以看出，本实施例的转缸活塞压缩机的泵体结构，其主要由驱动轴80、上法兰71、下法兰72、气缸20、气缸套10、活塞60、第一轴承座40、位于气缸上方的第一轴承31、限位板、第二轴承32以及相应的连接螺钉组成。
第一轴承31结构实施方式：在常规转缸活塞压缩机的泵体的基础上，减少气缸套10的高度。在气缸套10上面添加第一轴承座40，第一轴承座40内安置滚动轴承。其中，本实施例的气缸套10加第一轴承座40的总高度与原气缸套高度相等，第一轴承座40高度与第一轴承31相等，第一轴承31内圈的内径略小于气缸套10的内径。气缸20的外圆与第一轴承31的内圆为过渡配合，而与气缸套10内圆不接触，因此在压缩机运行时气缸与气缸套之间不存在直接的摩擦磨损。
第二结构实施方式：在常规转缸活塞压缩机泵体的基础上，上述的轴承安装段22为气缸短轴，增大限位板内圆的直径以形成上述的第二轴承座50，在其中安置滚动轴承，此时限位板的作用相当于轴承座。限位板与第二轴承32等高，且高于气缸短轴的长度；第二轴承32的内圈的外径大于等于气缸下止推面的外径。第二轴承32的外圆与限位板之间、轴承内圆与气缸短轴之间均为过渡配合，气缸止推面在重力及其它力的作用下与轴承内圈上平面紧密接触。在压缩机运行时，上述三个接触部位均不存在相对运动，因此可避免出现摩擦和磨损。
其它零件与常规转缸活塞压缩机大体相同。泵体装配方式为：将下法兰72、限位板和气缸套10用螺钉固定，在限位板内压入第二轴承32；在气缸20中装入活塞60，然后把气缸20安入气缸套10，并将气缸短轴压入第二轴承内圆；在气缸20上安装第一轴承31和第一轴承座40；安装驱动轴80和上法兰71，完成整个泵体装配。
通过在气缸20的上部和气缸短轴增加滚动轴承，将气缸外圆/气缸套内圆、气缸短轴外圆/限位板内圆、气缸下止推面/限位板上平面三个摩擦副的滑动摩擦转变为滚动摩擦，降低压缩机摩擦功耗，提高压缩机的能效和可靠性。
本实施例解决的技术问题：
1、将气缸20与气缸套10之间的滑动摩擦部分转化为轴承滚动体间的滚动摩擦，有效地减小摩擦力和相应零件的磨损，降低摩擦功耗，提高压缩机能效。
2、将气缸短轴和下止推面与限位板之间的滑动摩擦全部转化为轴承滚动体间的滚动摩擦，达到减小摩擦力和摩擦功耗、避免相应零件磨损、提高压缩机能效的作用。
总的来说，本实施例可有效地减小气缸与气缸套之间、气缸短轴和下止推面与限位板之间的磨损，从而提高压缩机泵体工作的可靠性；同时，减小上述部位的摩擦给压缩机带来的功率损失，提高压缩机整机能效。
以上所述仅为本发明的优选实施例而已，并不用于限制本发明，对于本领域的技术人员来说，本发明可以有各种更改和变化。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。

Claims (11)

  1. 一种转缸活塞压缩机的泵体，其特征在于，包括：
    气缸套(10)；
    气缸(20)，可转动地设置在所述气缸套(10)内，所述气缸(20)的外周面与所述气缸套(10)的内周面之间间隙配合。
  2. 根据权利要求1所述的泵体，其特征在于，所述气缸(20)与所述气缸套(10)之间通过轴承(30)连接。
  3. 根据权利要求2所述的泵体，其特征在于，所述气缸(20)的两端均安装有所述轴承(30)。
  4. 根据权利要求2或3项所述的泵体，其特征在于，所述轴承(30)为滚动轴承。
  5. 根据权利要求2所述的泵体，其特征在于，所述轴承(30)包括第一轴承(31)，所述第一轴承(31)套设在所述气缸(20)的端部，所述泵体还包括第一轴承座(40)，所述第一轴承座(40)固定在所述气缸套(10)的端面上，所述第一轴承座(40)上设置有第一轴承安装孔，所述第一轴承(31)安装在所述第一轴承安装孔内。
  6. 根据权利要求5所述的泵体，其特征在于，
    所述第一轴承(31)的内径小于所述气缸套(10)的内径；和/或，
    所述第一轴承座(40)和所述第一轴承(31)在所述气缸(20)的轴向上延伸的长度相同。
  7. 根据权利要求2所述的泵体，其特征在于，所述轴承(30)还包括套设在所述气缸(20)的下端的第二轴承(32)，所述气缸(20)包括气缸本体(21)和设置在所述气缸本体(21)上的凸出结构(23)，所述凸出结构(23)压设在所述第二轴承(32)的内圈(321)上，所述凸出结构(23)与所述第二轴承(32)的外圈(322)分离设置。
  8. 根据权利要求2所述的泵体，其特征在于，所述气缸(20)包括气缸本体(21)和设置在所述气缸本体(21)的一端的轴承安装段(22)，所述轴承安装段(22)的外径小于所述气缸本体(21)的外径，所述轴承还包括第二轴承(32)，所述第二轴承(32)套设在所述轴承安装段(22)上，所述泵体还包括第二轴承座(50)，所述第二轴承座(50)上设置有第二轴承安装孔，所述第二轴承(32)安装在所述第二轴承安装孔内。
  9. 根据权利要求8所述的泵体，其特征在于，
    所述第二轴承座(50)沿所述气缸(20)的轴向延伸的长度大于所述轴承安装段(22)沿所述气缸(20)的轴向延伸的长度；和/或，
    所述第二轴承(32)的厚度大于所述轴承安装段(22)沿所述气缸(20)的轴向延伸的长度。
  10. 根据权利要求9所述的泵体，其特征在于，所述气缸本体(21)的靠近所述轴承安装段(22)的端面上设置有凸出结构(23)，所述凸出结构(23)与所述第二轴承(32)的内圈抵接，所述凸出结构(23)与所述第二轴承(32)的外圈相分离。
  11. 一种压缩机，其特征在于，包括壳体组件(2)和安装在所述壳体组件(2)内的转缸活塞压缩机的泵体，所述转缸活塞压缩机的泵体为权利要求1至10中任一项所述的转缸活塞压缩机的泵体。
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