WO2017132795A1 - 一种汽车空调压缩机 - Google Patents

一种汽车空调压缩机 Download PDF

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Publication number
WO2017132795A1
WO2017132795A1 PCT/CN2016/073057 CN2016073057W WO2017132795A1 WO 2017132795 A1 WO2017132795 A1 WO 2017132795A1 CN 2016073057 W CN2016073057 W CN 2016073057W WO 2017132795 A1 WO2017132795 A1 WO 2017132795A1
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WO
WIPO (PCT)
Prior art keywords
bearing
thrust
crankshaft
rolling bearing
housing
Prior art date
Application number
PCT/CN2016/073057
Other languages
English (en)
French (fr)
Inventor
黎文庆
Original Assignee
佛山粤海汽车空调机有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 佛山粤海汽车空调机有限公司 filed Critical 佛山粤海汽车空调机有限公司
Priority to CN201680001922.1A priority Critical patent/CN107532580A/zh
Priority to PCT/CN2016/073057 priority patent/WO2017132795A1/zh
Priority to US15/325,587 priority patent/US20180031035A1/en
Publication of WO2017132795A1 publication Critical patent/WO2017132795A1/zh

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Classifications

    • 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
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
    • F16C19/44—Needle bearings
    • F16C19/46—Needle bearings with one row or needles
    • 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
    • F04B27/0404—Details, component parts specially adapted for such pumps
    • 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
    • F04B27/053—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement with an actuating element at the inner ends of the cylinders
    • 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
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/006—Crankshafts
    • 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
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
    • F16C19/34—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load
    • F16C19/38—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers
    • F16C19/381—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers with at least one row for radial load in combination with at least one row for axial load
    • 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
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
    • F16C19/44—Needle bearings
    • F16C19/46—Needle bearings with one row or needles
    • F16C19/463—Needle bearings with one row or needles consisting of needle rollers held in a cage, i.e. subunit without race rings
    • 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
    • F16C3/00—Shafts; Axles; Cranks; Eccentrics
    • F16C3/04—Crankshafts, eccentric-shafts; Cranks, eccentrics
    • F16C3/06—Crankshafts
    • F16C3/08—Crankshafts made in one piece
    • 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
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/58—Raceways; Race rings
    • 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
    • F16C2202/00—Solid materials defined by their properties
    • F16C2202/02—Mechanical properties
    • F16C2202/04—Hardness
    • 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
    • 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
    • F16C2362/00—Apparatus for lighting or heating
    • F16C2362/52—Compressors of refrigerators, e.g. air-conditioners

Definitions

  • the invention relates to the technical field of compressors, and in particular to an automobile air conditioner compressor.
  • the working principle of the compressor the crankshaft of the compressor 1 Rotation, the piston moves the upper and lower radial linear motion to achieve suction and exhaust.
  • the axial fixing of the crankshaft 1 is to connect the thrust washer 2 between the balance block and the housing, and the butterfly spring. 3. Prevent the axial movement of the crankshaft 1 under the deformation of the butterfly spring 3.
  • the crankshaft 1 After anatomy, identification, research and analysis, it is mainly the crankshaft 1 During the rotation, the thrust washer 2 has a phenomenon of rotating together with the crankshaft 1, and the thrust washer 2
  • the end face of the aluminum alloy material in contact with the shell has a relative motion to generate friction, causing wear and tear on the end face to generate metal debris, and the generated metal debris causes serious damage to the surface of the compressor piston and other components.
  • the axial clearance of the compressor main shaft becomes larger, and the compressor is stuck. The above reasons seriously reduce the performance of the compressor and shorten the service life of the compressor.
  • the technical problem to be solved by the present invention is to provide an automotive air conditioning compressor which can effectively improve the axial fixation of the crankshaft without wear on the casing.
  • the technical solution of the present invention is:
  • An automotive air conditioner compressor includes a crankshaft, a housing, an end cover, a rear balancer, a front balancer, a butterfly spring, a thrust bearing, a rear rolling bearing, a front rolling bearing, and the housing is coupled to the end cover;
  • the body is coupled to an outer diameter of the rear rolling bearing, a rear main journal of the crankshaft is coupled to an inner diameter of the rear rolling bearing; an outer diameter of the front rolling bearing is coupled to the end cap, a front main journal of the crankshaft
  • the inner diameter connection of the front rolling bearing; the outer end faces of the two crank arms of the connecting rod journal of the crankshaft are respectively connected with the rear balance block and the front balance block; the outer side of the front balance block is connected with the butterfly spring; the rear balance block is connected
  • a thrust bearing is coupled to at least one of the housing and the butterfly spring and the end cap.
  • a thrust bearing is connected between the rear balance block and the casing, and between the butterfly spring and the end cover.
  • the thrust bearing is a one-way thrust ball bearing.
  • the thrust bearing may also employ a thrust cylindrical roller bearing.
  • the thrust bearing may also adopt a one-way thrust needle roller bearing.
  • the needle roller hardness of the one-way thrust needle roller bearing is 60HRC to 65HRC; preferably 62HRC.
  • the surface roughness Ra of the one-way thrust needle roller bearing washer raceway is 0.15 ⁇ m to 0.2 ⁇ m; preferably 0.18 ⁇ m.
  • One-way thrust needle roller bearing thrust washer hardness 60HRC ⁇ 65HRC; preferably 62HRC.
  • the combination of the thrust bearing and the butterfly spring is adopted for the axial fixing of the compressor.
  • the crankshaft of the compressor is operated, even if the thrust bearing is squeezed, the bearing washer that drives the thrust bearing rotates, and the bearing washer of the thrust bearing and the compressor housing and the end cap contact end does not move, to the compressor casing and The contact end face of the end cap is worn. Because there is no wear, there is no The production of metal scraps effectively improves the operating environment of components such as compressor pistons and improves the service life of various components of the compressor.
  • the axial clearance of the compressor crankshaft will not become large, and the compressor will not be stuck when it is running. Therefore the invention
  • the automotive air conditioning compressor has better running performance, longer service life, better economic efficiency and strong potential market competitiveness.
  • FIG. 1 is a cross-sectional view of a prior art automotive air conditioner compressor using a thrust pad
  • Figure 2 is a cross-sectional view of the present invention
  • Fig. 3 is a partial enlarged view of I of Fig. 2;
  • an automotive air conditioner compressor includes a crankshaft 1, a butterfly spring 3, a housing 4, an end cover 5, and a rear balance block 6 , front balance block 7 , thrust bearing 8 , rear rolling bearing 9 , front rolling bearing 10 , housing 4 and end cover 5 connection ; housing 4 and rear rolling bearing 9
  • the outer diameter of the crankshaft 1 is connected to the inner diameter of the rear rolling bearing 9; the outer diameter of the front rolling bearing 10 is connected to the end cap 5, the front main journal of the crankshaft 1 and the front rolling bearing 10
  • the inner diameter of the two crankshaft arms of the crankshaft 1 is connected to the rear weight 6 and the front weight 7 respectively; the outer side of the front weight 7 is connected to the butterfly spring 3; the rear weight 6 is Housing 4 Between the butterfly spring 3 and the end cover 5, at least one of them is connected with a thrust bearing 8 .
  • the above technical solution effectively reduces the rotation of the crankshaft 1 to the housing 4 or the end cover 5 due to the action of the thrust bearing 8
  • the wear and tear avoids the generation of metal debris, improves the operating environment quality of the internal components of the compressor, and avoids the damage of metal debris on the surface of internal components, prolonging the service life of compressor components.
  • the rear balance block A thrust bearing 8 is connected between the butterfly spring 3 and the end cover 5 between the housing 6 and the housing 4. This technical solution completely avoids the housing 4 and the end cover 5 when the crankshaft 1 is in operation.
  • the thrust bearing 8 It can be a one-way thrust ball bearing; it can also be a thrust cylindrical roller bearing; it can also be a one-way thrust needle roller bearing.
  • a one-way thrust needle roller bearing is selected, and the needle roller hardness of the one-way thrust needle roller bearing is 60HRC ⁇ 65HRC; the surface roughness Ra of the washer raceway is 0.15 ⁇ m ⁇ 0.2 ⁇ m; the hardness of the thrust washer is 60HRC ⁇ 65HRC
  • the needle hardness of the one-way thrust needle roller bearing is 62HRC
  • the surface roughness Ra of the washer raceway is 0.18 ⁇ m
  • the hardness of the washer is 62HRC.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • Rolling Contact Bearings (AREA)
  • Compressor (AREA)

Abstract

一种汽车空调压缩机，包括曲轴（1）、壳体（4）、端盖（5）、后平衡块（6）、前平衡块（7）、蝶形弹簧（3）、推力轴承（8）、后滚动轴承（9）、前滚动轴承（10），壳体（4）分别与端盖（5）、后滚动轴承（9）的外径连接，曲轴（1）的后主轴颈与后滚动轴承（9）的内径连接；前滚动轴承（10）的外径与端盖（5）连接，曲轴（1）的前主轴颈与前滚动轴承（10）的内径连接；曲轴（1）的连杆轴颈的两曲轴臂的外端面分别与后平衡块（6）、前平衡块（7）连接；前平衡块（7）的外侧与蝶形弹簧（3）连接；在后平衡块（6）与壳体（4）之间、蝶形弹簧（3）与端盖（5）之间，至少其中之一连接有推力轴承（8）。该汽车空调压缩机不会在压缩机壳体和端盖的接触端面产生磨损，不产生金属碎屑，不增加曲轴的轴向间隙，有效改善压缩机活塞等部件的运行环境，提高了压缩机运行质量、效率，延长了使用寿命。

Description

一种汽车空调压缩机 一种汽车空调压缩机
技术领域
本发明涉及压缩机技术领域，特别涉及一种汽车空调压缩机。
背景技术
压缩机的工作原理：压缩机的曲轴 1 旋转，带动活塞作上、下的径向直线运动，实现吸、排气。但是现有技术中，如附图１所示，由于曲轴 1 的轴向固定是在平衡块与壳体之间连接推力垫片 2 、以及蝶形弹簧 3 ，在蝶形弹簧 3 变形作用下防止曲轴 1 产生轴向移动。采用上述技术方案压缩机非常容易出现故障，整机寿命短。经解剖、鉴定、研究分析发现，主要是曲轴 1 转动过程中，推力垫片 2 存在随曲轴 1 一同转动的现象，推力垫片 2 与其接触的壳体铝合金材质的端面有相对运动产生摩擦，对端面造成磨损产生金属碎屑，产生的金属碎屑对压缩机活塞、以及其他零部件的表面造成了严重的损害。同时由于对压缩机壳体的磨损还造成了压缩机主轴轴向间隙变大，压缩机出现卡死的现象。上述原因严重降低了压缩机的使用性能，缩短了压缩机的使用寿命。
发明内容
本发明要解决的技术问题是提供有效改善曲轴轴向固定的、对壳体没有磨损的一种汽车空调压缩机。
为了解决上述技术问题，本发明的技术方案为：
一种汽车空调压缩机包括曲轴、壳体、端盖、后平衡块、前平衡块、蝶形弹簧、推力轴承、后滚动轴承、前滚动轴承，所述壳体与所述端盖连接；所述壳体与所述后滚动轴承的外径连接，所述曲轴的后主轴颈与所述后滚动轴承的内径连接；所述前滚动轴承的外径与所述端盖连接，所述曲轴的前主轴颈与所述前滚动轴承的内径连接；所述曲轴的连杆轴颈的两曲轴臂的外端面分别与所述后平衡块、前平衡块连接；前平衡块的外侧与蝶形弹簧连接；在后平衡块与壳体之间、蝶形弹簧与端盖之间，至少其中之一连接有推力轴承。
进一步地，所述后平衡块与壳体之间、蝶形弹簧与端盖之间，均连接有推力轴承。
进一步地，所述推力轴承为单向推力球轴承。
进一步地，所述推力轴承也可采用推力圆柱滚子轴承。
进一步地，所述所述推力轴承还可以采用单向推力滚针轴承。
进一步地，所述单向推力滚针轴承的滚针硬度为 60HRC ～ 65HRC ； 优选为62HRC。 单向推力滚针轴承垫圈滚道的表面粗糙度 Ra 为 0.15 μ m ～ 0.2 μ m ；优选为 0.18 μ m 。单向推力滚针轴承推力垫圈的硬度为 60HRC ～ 65HRC ；优选为 62HRC 。
采用上述技术方案，由于对压缩机的轴向固定采用了推力轴承与 蝶形弹簧的组合 ，压缩机的曲轴运行时即使有对推力轴承的挤压，带动推力轴承的轴承垫圈旋转，也不会导致推力轴承与压缩机壳体和端盖接触端的轴承垫圈运动，对压缩机壳体和端盖的接触端面磨损。由于没有磨损也就没有 金属碎屑产生，有效改善压缩机活塞等零部件运行环境，提高了压缩机各零部件的使用寿命。同时压缩机曲轴的轴向间隙也不会变大，压缩机运行时也就不会出现卡死现象。因此本发明的 汽车空调压缩机运行性能更好，使用寿命更长，经济效益更好，具有较强的潜在市场竞争力。
附图说明
图1为现有技术中使用推力垫片的汽车空调压缩机剖视图；
图2为本发明剖视图；
图３为图２的Ⅰ局部放大图。
具体实施方式
下面结合附图对本发明的具体实施方式作进一步说明。在此需要说明的是，对于这些实施方式的说明用于帮助理解本发明，但并不构成对本发明的限定。此外，下面所描述的本发明各个实施方式中所涉及的技术特征只要彼此之间未构成冲突就可以相互组合。
如附图２和附图３所示， 一种汽车空调压缩机包括曲轴１、蝶形弹簧 3 、壳体 4 、端盖 5 、后平衡块 6 、前平衡块 7 、推力轴承 8 、后滚动轴承 9 、前滚动轴承 10 ，壳体 4 与端盖 5 连接；壳体 4 与后滚动轴承 9 的外径连接，曲轴１的后主轴颈与后滚动轴承 9 的内径连接；前滚动轴承 10 的外径与端盖 5 连接，曲轴１的前主轴颈与前滚动轴承 10 的内径连接；曲轴１的连杆轴颈的两曲轴臂的外端面分别与后平衡块 6 、前平衡块 7 连接；前平衡块 7 的外侧与蝶形弹簧 3 连接；在后平衡块 6 与壳体 4 之间、蝶形弹簧 3 与端盖 5 之间，至少其中之一连接有推力轴承 8 。上述技术方案由于推力轴承 8 的作用，有效降低了曲轴１转动时对壳体 4 或端盖 5 的磨损，避免了 金属碎屑的产生，提高了压缩机内部零部件的运行环境质量，避免内部零部件表面受到金属碎屑损害，延长了压缩机零部件的使用寿命。更为具体地， 后平衡块 6 与壳体 4 之间、蝶形弹簧 3 与端盖 5 之间，均连接有推力轴承 8 。该技术方案完全避免了曲轴１运行时壳体 4 和端盖 5 与曲轴１连接的端面受到磨损，避免 金属碎屑产生，同时还避免了 曲轴１轴向间隙的扩大，有效消除了曲轴１运行时出现卡死的现象，提高压缩机的运行质量和使用寿命。更为具体地，推力轴承 8 可以为单向推力球轴承；也可以为推力圆柱滚子轴承；还可以为单向推力滚针轴承。本发明具体实施中选择了单向推力滚针轴承，所述单向推力滚针轴承的滚针硬度为 60HRC ～ 65HRC ；垫圈滚道的表面粗糙度 Ra 为 0.15 μ m ～ 0.2 μ m ；推力垫圈的硬度为 60HRC ～ 65HRC ；具体实施中，单向推力滚针轴承的滚针硬度为 62HRC ，垫圈滚道的表面粗糙度 Ra 为 0.18 μ m ，垫圈的硬度为 62HRC 。该单向推力滚针轴承的额定负荷： C ａ =14.1KN ； CO ａ = 56KN ，有效提高了推力轴承的性能和使用寿命，进而提高了压缩机的运行质量、运行效率，以及使用寿命。
以上结合附图对本发明的实施方式作了详细说明，但本发明不限于所描述的实施方式。对于本领域的技术人员而言，在不脱离本发明原理和精神的情况下，对这些实施方式进行多种变化、修改、替换和变型，仍落入本发明的保护范围内。

Claims (9)

  1. 一种汽车空调压缩机，其特征在于，包括曲轴、壳体、端盖、后平衡块、前平衡块、蝶形弹簧、推力轴承、后滚动轴承、前滚动轴承，所述壳体与所述端盖连接；所述壳体与所述后滚动轴承的外径连接，所述曲轴的后主轴颈与所述后滚动轴承的内径连接；所述前滚动轴承的外径与所述端盖连接，所述曲轴的前主轴颈与所述前滚动轴承的内径连接；所述曲轴的连杆轴颈的两曲轴臂的外端面分别与所述后平衡块、前平衡块连接；前平衡块的外侧与蝶形弹簧连接；在后平衡块与壳体之间、蝶形弹簧与端盖之间，至少其中之一连接有推力轴承。
  2. 根据权利要求1所述的汽车空调压缩机，其特征在于，所述后平衡块与壳体之间、蝶形弹簧与端盖之间，均连接有推力轴承。
  3. 根据权利要求1或2所述的汽车空调压缩机，其特征在于，所述推力轴承为单向推力球轴承。
  4. 根据权利要求1或2所述的汽车空调压缩机，其特征在于，所述推力轴承为推力圆柱滚子轴承。
  5. 根据权利要求1或2所述的汽车空调压缩机，其特征在于，所述推力轴承为单向推力滚针轴承。
  6. 根据权利要求5所述的汽车空调压缩机，其特征在于，所述单向推力滚针轴承的滚针硬度为60HRC～65HRC。
  7. 根据权利要求6所述的汽车空调压缩机，其特征在于，所述单向推力滚针轴承垫圈滚道的表面粗糙度Ra为0.15μm～0.2μm。
  8. 根据权利要求7所述的汽车空调压缩机，其特征在于，所述单向推力滚针轴承推力垫圈的硬度为60HRC～65HRC。
  9. 根据权利要求８所述的汽车空调压缩机，其特征在于，所述单向推力滚针轴承的滚针硬度为62HRC，垫圈滚道的表面粗糙度Ra为0.18μm，垫圈的硬度为62HRC。
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