WO2022000873A1

WO2022000873A1 - Scroll compressor

Info

Publication number: WO2022000873A1
Application number: PCT/CN2020/122653
Authority: WO
Inventors: 袁晚春; 贾祥敏
Original assignee: 艾默生环境优化技术(苏州)有限公司
Priority date: 2020-07-01
Filing date: 2020-10-22
Publication date: 2022-01-06

Abstract

A scroll compressor (100), comprising a scroll mechanism, wherein the scroll mechanism comprises a fixed scroll (12) and a movable scroll (13), and the movable scroll (13) is configured to be able to orbit relative to the fixed scroll (12) to compress a working fluid; a main bearing seat (15), wherein the main bearing seat (15) supports the movable scroll (13); and an axial flexible mounting mechanism, wherein the fixed scroll (12) is connected to the main bearing seat (15) by means of the axial flexible mounting mechanism, such that the fixed scroll (12) can move by a predetermined distance in an axial direction. The axial flexible mounting mechanism comprises fasteners (17, 171, 172, 271, 272, 371, 372) and a sleeve (19, 29, 39) arranged at the periphery of the fastener (17, 171, 172, 271, 272, 371, 372), wherein the dimensions of the sleeve (19, 29, 39) in a tangential direction are greater than the dimensions thereof in a radial direction, and the sleeve (19, 29, 39) is provided with two or more fasteners (17, 171, 172, 271, 272, 371, 372).

Description

涡旋压缩机scroll compressor

本申请要求以下中国专利申请的优先权：于2020年7月1日提交中国专利局的申请号为202010622047.7、发明创造名称为“涡旋压缩机”的中国专利申请；于2020年7月1日提交中国专利局的申请号为202021257269.5、发明创造名称为“涡旋压缩机”的中国专利申请。这些专利申请的全部内容通过引用结合在本申请中。This application claims the priority of the following Chinese patent applications: Chinese Patent Application No. 202010622047.7 filed with the China Patent Office on July 1, 2020 and named "Scroll Compressor" for invention-creation; on July 1, 2020 The Chinese patent application with the application number of 202021257269.5 and the invention-creation name "scroll compressor" submitted to the China Patent Office. The entire contents of these patent applications are incorporated herein by reference.

技术领域technical field

本公开涉及一种涡旋压缩机，更具体地，涉及一种用于涡旋压缩机的轴向柔性安装机构。The present disclosure relates to a scroll compressor, and more particularly, to an axially flexible mounting mechanism for a scroll compressor.

背景技术Background technique

本部分的内容仅提供了与本公开相关的背景信息，其可能并不构成现有技术。The content in this section merely provides background information related to the present disclosure and may not constitute prior art.

涡旋压缩机可以应用于例如制冷***、空调***和热泵***中。涡旋压缩机包括用于压缩工作流体(例如制冷剂)的涡旋机构、用于支承涡旋机构的主轴承座、用于驱动涡旋机构的旋转轴以及用于驱动旋转轴旋转的马达。涡旋机构包括定涡旋和相对于定涡旋平动绕动的动涡旋。定涡旋和动涡旋均包括端板和从端板的一侧延伸的螺旋叶片。当动涡旋相对于定涡旋绕动时，定涡旋和动涡旋的螺旋叶片之间形成体积从径向外侧向径向内侧逐渐减小的一系列移动的压缩腔，由此压缩工作流体。Scroll compressors can be used, for example, in refrigeration systems, air conditioning systems, and heat pump systems. The scroll compressor includes a scroll mechanism for compressing a working fluid (eg, refrigerant), a main bearing housing for supporting the scroll mechanism, a rotary shaft for driving the scroll mechanism, and a motor for driving the rotary shaft to rotate. The scroll mechanism includes a fixed scroll and a movable scroll that orbits in translation relative to the fixed scroll. Both the fixed scroll and the movable scroll include an end plate and a helical blade extending from one side of the end plate. When the movable scroll orbits relative to the fixed scroll, a series of moving compression chambers whose volume gradually decreases from the radially outer side to the radially inner side is formed between the fixed scroll and the helical blades of the movable scroll, thereby compressing the working fluid .

在涡旋压缩机正常运行时，定涡旋和动涡旋中的一者的螺旋叶片的稍端与另一者的端板之间需要达到良好密封。另一方面，例如，在涡旋压缩机的压缩腔内的压力过高时，螺旋叶片可以与端板分离以卸载高压流体，从而避免涡旋机构受到损害。When the scroll compressor is in normal operation, a good seal needs to be achieved between the tip of the spiral blade of one of the fixed scroll and the movable scroll and the end plate of the other. On the other hand, for example, when the pressure in the compression chamber of a scroll compressor is too high, the helical vanes can be separated from the end plate to unload the high pressure fluid, thereby avoiding damage to the scroll mechanism.

为此，通过轴向柔性安装机构将定涡旋安装至主轴承座，使得定涡旋可以相对于动涡旋轴向移动一定距离。轴向柔性安装机构通常包括紧固件和位于紧固件外侧的套筒。紧固件***定涡旋的凸耳的安装孔中以将定涡旋螺纹连接至主轴承座。套筒也***定涡旋的安装孔中并且设置在紧固件头部与主轴承座之间，使得紧固件头部与定涡旋的凸耳之间存在一定间隙以供定涡旋的轴向移动。紧固件通常为螺钉、螺栓等。To this end, the fixed scroll is mounted to the main bearing seat through an axially flexible mounting mechanism, so that the fixed scroll can move axially with respect to the movable scroll for a certain distance. Axially flexible mounting mechanisms typically include a fastener and a sleeve located outside the fastener. Fasteners are inserted into the mounting holes of the lugs of the fixed scroll to thread the fixed scroll to the main bearing housing. The sleeve is also inserted into the mounting hole of the fixed scroll and is arranged between the fastener head and the main bearing seat, so that there is a certain gap between the fastener head and the lugs of the fixed scroll for the fixed scroll. Axial movement. Fasteners are usually screws, bolts, etc.

然而，在涡旋压缩机的运行过程中，经常出现螺栓松脱甚至断裂的现象，主轴承座与螺栓连接的位置也存在破裂的风险。为了防止轴向柔性安装机构失效，往往需要将螺栓以及与螺栓连接的主轴承座的部分的尺寸、尤其是径向方向上的尺寸设计得较大，从而保证螺栓及主轴承座的强度，然而这不利于涡旋压缩机的小型化。However, during the operation of the scroll compressor, the bolts are often loosened or even broken, and the position where the main bearing seat is connected to the bolts is also at risk of rupture. In order to prevent the failure of the axial flexible mounting mechanism, it is often necessary to design the size of the bolt and the part of the main bearing seat connected with the bolt to be larger, especially the size in the radial direction, so as to ensure the strength of the bolt and the main bearing seat. However, This is not conducive to the miniaturization of the scroll compressor.

发明内容SUMMARY OF THE INVENTION

本公开提供一种能够在保证螺栓、主轴承座的强度的同时减小涡旋压缩机的特别是在径向方向上的尺寸的涡旋压缩机设计。在根据本公开的涡旋压缩机中，不仅将螺栓和主轴承座的断裂失效的风险维持在低水平，还能够优化涡旋压缩机内的空间设计，使得涡旋压缩机进一步小型化。The present disclosure provides a scroll compressor design that can reduce the size of the scroll compressor, especially in the radial direction, while ensuring the strength of the bolts, the main bearing seat. In the scroll compressor according to the present disclosure, not only the risk of breakage failure of the bolt and the main bearing housing is maintained at a low level, but also the space design within the scroll compressor can be optimized, resulting in further miniaturization of the scroll compressor.

根据本公开的一个方面，提供了一种涡旋压缩机，包括：涡旋机构，该涡旋机构包括定涡旋和动涡旋，动涡旋构造成能够相对于定涡旋绕动以对工作流体进行压缩；主轴承座，该主轴承座支撑动涡旋；以及轴向柔性安装机构，经由轴向柔性安装机构将定涡旋连接至主轴承座，使得定涡旋能够沿轴向方向移动预定距离，轴向柔性安装机构包括紧固件以及设置在紧固件外周的套筒，套筒的在切向方向上的尺寸大于在径向方向上的尺寸，并且，套筒装配有两个或更多个紧固件。According to one aspect of the present disclosure, there is provided a scroll compressor including: a scroll mechanism including a fixed scroll and an orbiting scroll, the orbiting scroll being configured to orbit relative to the fixed scroll for operation The fluid is compressed; the main bearing seat, which supports the movable scroll; and the axial flexible mounting mechanism, which connects the fixed scroll to the main bearing seat via the axial flexible mounting mechanism, so that the fixed scroll can move in the axial direction a predetermined distance, the axially flexible mounting mechanism includes a fastener and a sleeve arranged on the outer periphery of the fastener, the dimension of the sleeve in the tangential direction is larger than the dimension in the radial direction, and the sleeve is assembled with two or more fasteners.

可选地，定涡旋包括从定涡旋的外周面沿径向向外突出的凸耳，凸耳具有供套筒穿过的安装孔，套筒的在切向方向上的两个第一端部能够与该安装孔的内侧壁接触，套筒的在径向方向上的两个第二端部与该安装孔的内侧壁之间存在间隙，使得第二端部不与该安装孔的内侧壁接触。Optionally, the fixed scroll includes a lug protruding radially outward from the outer peripheral surface of the fixed scroll, the lug has a mounting hole for the sleeve to pass through, and the two first The end portion can be in contact with the inner side wall of the mounting hole, and there is a gap between the two second ends of the sleeve in the radial direction and the inner side wall of the mounting hole, so that the second end portion does not contact the inner side wall of the mounting hole. Inner sidewall contact.

可选地，在套筒的径向横截面上，第一端部构造为圆弧段，第二端部构造为直线段，并且第一端部与第二端部之间通过过渡段连接，该过渡段不与安装孔的内侧壁接触。Optionally, on the radial cross section of the sleeve, the first end is configured as a circular arc segment, the second end is configured as a straight segment, and the first end and the second end are connected by a transition segment, The transition section is not in contact with the inner side wall of the mounting hole.

可选地，过渡段构造为从圆弧段以与圆弧段的曲率半径相同的曲率半径朝向直线段延伸，并且与直线段相切；或者过渡段构造为从圆弧段以比圆弧段的曲率半径小的曲率半径朝向直线段延伸，并且与直线段相切。Optionally, the transition segment is configured to extend from the circular arc segment toward the straight line segment with the same radius of curvature as that of the circular arc segment, and is tangent to the straight line segment; The radius of curvature of the small radius of curvature extends toward the line segment and is tangent to the line segment.

可选地，圆弧段的延伸角度小于100°。Optionally, the extension angle of the arc segment is less than 100°.

可选地，第二端部与安装孔的内侧壁之间的径向间隙大于0.1mm。Optionally, the radial gap between the second end portion and the inner side wall of the mounting hole is greater than 0.1 mm.

可选地，凸耳的与第一端部相邻的切向侧端部在切向方向上的侧壁厚度大于紧固件的杆部的直径的30％。Optionally, the sidewall thickness in the tangential direction of the tangential side end of the lug adjacent to the first end is greater than 30% of the diameter of the shank of the fastener.

可选地，套筒包括用于装配紧固件的两个或更多个轴向通孔，轴向通孔在套筒中沿切向方向分布，套筒的介于第一端部与最靠近该第一端部的轴向通孔之间的在切向方向上的侧壁厚度大于紧固件的杆部的直径的30％。Optionally, the sleeve includes two or more axial through holes for assembling the fastener, the axial through holes are distributed in the tangential direction in the sleeve, and the sleeve between the first end and the most The sidewall thickness in the tangential direction between the axial through holes near the first end is greater than 30% of the diameter of the shank of the fastener.

可选地，紧固件为两个，两个紧固件之间的切向距离大于紧固件的杆部的直径的2.1倍并且小于紧固件的杆部的直径的5倍。Optionally, there are two fasteners, and the tangential distance between the two fasteners is greater than 2.1 times the diameter of the shank of the fastener and less than 5 times the diameter of the shank of the fastener.

可选地，涡旋压缩机设置有沿周向均匀分布的三个或四个轴向柔性安装机构。Optionally, the scroll compressor is provided with three or four axially flexible mounting mechanisms evenly distributed along the circumferential direction.

附图说明Description of drawings

通过以下参照附图的描述，本公开的一个或多个实施方式的特征和优点将变得更加容易理解。这里所描述的附图仅是出于说明目的而并非意图以任何方式限制本公开的范围。附图并非按比例绘制，而是可以放大或缩小一些特征以显示特定部件的细节。在附图中：The features and advantages of one or more embodiments of the present disclosure will become more readily understood from the following description with reference to the accompanying drawings. The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. The figures are not to scale and some features may be exaggerated or minimized to show details of particular components. In the attached image:

图1为根据本公开的涡旋压缩机的局部纵剖视图；1 is a partial longitudinal cross-sectional view of a scroll compressor according to the present disclosure;

图2为图1中的A部分的放大细节图，其中示出了轴向柔性安装机构；Figure 2 is an enlarged detail view of part A of Figure 1 showing the axially flexible mounting mechanism;

图3为根据本公开第一实施方式的涡旋机构的立体示意图，其中，该涡旋机构包括四个轴向柔性安装机构；3 is a schematic perspective view of the scroll mechanism according to the first embodiment of the present disclosure, wherein the scroll mechanism includes four axially flexible mounting mechanisms;

图4为根据本公开第一实施方式的涡旋机构的径向剖视图；4 is a radial cross-sectional view of the scroll mechanism according to the first embodiment of the present disclosure;

图5为图4中的B部分的放大细节图，其中示出了一个轴向柔性安装机构；Figure 5 is an enlarged detail view of part B of Figure 4 showing an axially flexible mounting mechanism;

图6为本公开第一实施方式的涡旋机构的一个轴向柔性安装机构的切向剖视图；6 is a tangential cross-sectional view of an axially flexible mounting mechanism of the scroll mechanism according to the first embodiment of the disclosure;

图7为根据本公开第二实施方式的涡旋机构的径向剖视图，其中，该涡旋机构包括三个轴向柔性安装机构；7 is a radial cross-sectional view of a scroll mechanism according to a second embodiment of the present disclosure, wherein the scroll mechanism includes three axially flexible mounting mechanisms;

图8为现有的涡旋机构的径向剖视图，其中，该涡旋机构包括四个轴向柔性安装机构；8 is a radial cross-sectional view of an existing scroll mechanism, wherein the scroll mechanism includes four axially flexible mounting mechanisms;

图9a和图9b分别为根据本公开第一实施方式、第二实施方式的轴向柔性安装机构与现有的轴向柔性安装机构的受力及弯矩分布对比图示；以及Fig. 9a and Fig. 9b are respectively diagrams showing the comparison of force and bending moment distribution between the axially flexible mounting mechanism according to the first embodiment and the second embodiment of the present disclosure and the existing axially flexible mounting mechanism; and

图10示出了根据本公开的涡旋机构的轴向柔性安装机构的变形示例。10 shows a modified example of the axially flexible mounting mechanism of the scroll mechanism according to the present disclosure.

具体实施方式detailed description

现在将参照附图更全面地描述示例性实施方式。Example embodiments will now be described more fully with reference to the accompanying drawings.

提供示例性实施方式以使得本公开将是详尽的并且将向本领域技术人员更全面地传达范围。阐述了许多具体细节比如具体部件、装置和方法的示例，以提供对本公开的各实施方式的透彻理解。对本领域技术人员而言将清楚的是，不需要采用具体细节，示例性实施方式可以以许多不同的形式实施，并且也不应当理解为限制本公开的范围。在一些示例性实施方式中，不对公知的过程、公知的装置结构和公知的技术进行详细的描述。Example embodiments are provided so that this disclosure will be thorough, and will fully convey the scope to those skilled in the art. Numerous specific details are set forth such as examples of specific components, devices, and methods in order to provide a thorough understanding of various embodiments of the present disclosure. It will be apparent to those skilled in the art that specific details need not be employed, that example embodiments may be embodied in many different forms and that neither should be construed to limit the scope of the disclosure. In some example embodiments, well-known processes, well-known device structures, and well-known technologies are not described in detail.

下面参照图1来描述涡旋压缩机100的总体结构。如图所示，压缩机100包括涡旋机构、马达、旋转轴(也可以称为驱动轴或曲轴)14、主轴承座15以及包围涡旋机构等上述部件的壳体11。The general structure of the scroll compressor 100 will be described below with reference to FIG. 1 . As shown, the compressor 100 includes a scroll mechanism, a motor, a rotating shaft (also referred to as a drive shaft or a crankshaft) 14, a main bearing housing 15, and a casing 11 that surrounds the scroll mechanism and the like.

涡旋机构包括定涡旋12和动涡旋13。马达构造成使旋转轴14旋转，接着，旋转轴14驱动动涡旋13相对于定涡旋12绕动运动(即，动涡旋的中心轴线绕定涡旋的中心轴线运动，但是动涡旋不会绕其中心轴线旋转)以压缩工作流体。The scroll mechanism includes a fixed scroll 12 and a movable scroll 13 . The motor is configured to rotate the rotating shaft 14, which in turn drives the orbiting scroll 13 relative to the fixed scroll 12 (ie, the central axis of the orbiting scroll moves around the central axis of the fixed scroll, but the orbiting scroll does not rotate about its central axis) to compress the working fluid.

定涡旋12可以以任何合适的方式相对于壳体11固定，如图示的通过螺栓固定地安装至主轴承座15，后面将详细描述。定涡旋12可以包括定涡旋端板122和从定涡旋端板122的一侧延伸的定涡旋叶片124。如图2所示，定涡旋12还具有从其径向最外侧的外周面径向向外延伸的凸耳126。凸耳126中设置有安装孔，用于接收轴向柔性安装机构从而连接至主轴承座15。The fixed scroll 12 may be fixed relative to the housing 11 in any suitable manner, such as being bolted to the main bearing housing 15 as shown, as will be described in detail later. The fixed scroll 12 may include a fixed scroll end plate 122 and a fixed scroll vane 124 extending from a side of the fixed scroll end plate 122 . As shown in FIG. 2, the fixed scroll 12 also has lugs 126 extending radially outward from its radially outermost outer peripheral surface. Mounting holes are provided in the lugs 126 for receiving an axially flexible mounting mechanism for connection to the main bearing housing 15 .

动涡旋13可以包括动涡旋端板132、形成在动涡旋端板132一侧的动涡旋叶片134和形成在动涡旋端板132另一侧的毂部131。定涡旋叶片124与动涡旋叶片134能够彼此接合，使得当涡旋压缩机运行时在定涡旋叶片124和动涡旋叶片134之间形成一系列体积在从径向外侧向径向内侧逐渐减小的移动的压缩腔，从而实现对工作流体的压缩。毂部131与旋转轴14的偏心曲柄销接合并被偏心曲柄驱动。The orbiting scroll 13 may include an orbiting scroll end plate 132 , orbiting scroll blades 134 formed on one side of the orbiting scroll end plate 132 , and a hub 131 formed at the other side of the orbiting scroll end plate 132 . The fixed scroll vanes 124 and the orbiting scroll vanes 134 can be engaged with each other such that a series of volumes are formed between the fixed scroll vanes 124 and the orbiting scroll vanes 134 from the radially outer side to the radially inner side when the scroll compressor is operating. A progressively smaller moving compression chamber, thereby compressing the working fluid. The hub portion 131 is engaged with the eccentric crank pin of the rotating shaft 14 and is driven by the eccentric crank.

主轴承座15适于支承动涡旋13的动涡旋端板132。动涡旋端板132在主轴承座15的支承面上绕动。主轴承座15可以通过任何合适地方式相对于涡旋压缩机100的壳体11固定。The main bearing seat 15 is adapted to support the movable scroll end plate 132 of the movable scroll 13 . The movable scroll end plate 132 orbits on the bearing surface of the main bearing housing 15 . The main bearing housing 15 may be secured relative to the casing 11 of the scroll compressor 100 by any suitable means.

为了实现流体的压缩，定涡旋12和动涡旋部件13之间需要有效密封。In order to achieve the compression of the fluid, an effective seal is required between the fixed scroll 12 and the movable scroll member 13 .

一方面，在涡旋压缩机正常运行时，定涡旋12的螺旋叶片124的侧表面与动涡旋13的螺旋叶片134的侧表面之间也需要径向密封。二者之间的这种径向密封通常借助于动涡旋13在运转过程中的离心力以及旋转轴14提供的驱动力来实现。当不可压缩的异物(诸如固体杂质以及液态制冷剂)进入压缩腔中而卡在螺旋叶片124和134之间时，螺旋叶片124和134能够暂时沿径向彼此分开以允许异物通过，由此防止对螺旋叶片124和134造成损坏，从而为涡旋压缩机100提供了径向柔性。On the one hand, when the scroll compressor is in normal operation, radial sealing is also required between the side surfaces of the helical blades 124 of the fixed scroll 12 and the side surfaces of the helical blades 134 of the movable scroll 13 . This radial seal between the two is usually achieved by means of the centrifugal force of the movable scroll 13 during operation and the driving force provided by the rotating shaft 14 . When incompressible foreign matter (such as solid impurities and liquid refrigerant) enters the compression cavity and gets stuck between the

helical blades

124 and 134, the

helical blades

124 and 134 can be temporarily separated from each other in the radial direction to allow the foreign matter to pass, thereby preventing the Damage to the

helical vanes

124 and 134 provides radial flexibility to the scroll compressor 100 .

另一方面，在涡旋压缩机正常运行时，定涡旋12的螺旋叶片124的顶端与动涡旋13的端板132之间以及动涡旋13的螺旋叶片134的顶端与定涡旋12的端板122之间需要轴向密封。当涡旋压缩机的压缩腔中的压力过大时，压缩腔中的流体将通过定涡旋12的螺旋叶片124的顶端与动涡旋13的端板132之间的间隙以及动涡旋13的螺旋叶片134的顶端与定涡旋12的端板122之间的间隙泄漏到低压侧以实现卸载，从而为涡旋压缩机100提供了轴向柔性。On the other hand, when the scroll compressor is in normal operation, the top end of the helical blade 124 of the fixed scroll 12 and the end plate 132 of the movable scroll 13 and the top end of the helical blade 134 of the movable scroll 13 and the fixed scroll 12 Axial sealing is required between the end plates 122. When the pressure in the compression chamber of the scroll compressor is too high, the fluid in the compression chamber will pass through the gap between the top end of the spiral blade 124 of the fixed scroll 12 and the end plate 132 of the movable scroll 13 and the movable scroll 13 The gap between the top ends of the helical blades 134 of the scroll compressor 134 and the end plate 122 of the fixed scroll 12 leaks to the low pressure side to achieve unloading, thereby providing the scroll compressor 100 with axial flexibility.

为了提供轴向柔性，通过轴向柔性安装机构将定涡旋12安装至主轴承座15。参见图2，主轴承座15在其径向最外侧设置有沿轴向延伸的凸台151，凸台151在轴向上与相应的定涡旋12的凸耳126对准。轴向柔性安装机构包括螺栓17和位于螺栓17外周的套筒19。螺栓17和套筒19之间形成间隙配合。螺栓17具有杆部、位于杆部的一端的头部以及位于杆部的另一端的螺纹部。螺纹部构造成能够旋拧至主轴承座15的凸台151的螺纹孔中。螺栓17的头部的下表面与凸耳126的上表面之间形成间隙配合。套筒19也接收在定涡旋12的凸耳126的安装孔中并且套筒19的下端面与凸台151的上表面之间形成间隙配合。螺栓17的头部的下表面与凸耳26的上表面之间可以预留一定的间隙，使得定涡旋12在轴向上能够移动预定距离，从而为涡旋压缩机100提供轴向柔性。To provide axial flexibility, the fixed scroll 12 is mounted to the main bearing housing 15 by an axially flexible mounting mechanism. Referring to FIG. 2 , the main bearing seat 15 is provided with an axially extending boss 151 at its radially outermost side, and the boss 151 is axially aligned with the corresponding lug 126 of the fixed scroll 12 . The axially flexible mounting mechanism includes a bolt 17 and a sleeve 19 on the outer periphery of the bolt 17 . A clearance fit is formed between the bolt 17 and the sleeve 19 . The bolt 17 has a shank portion, a head portion located at one end of the shank portion, and a threaded portion located at the other end of the shank portion. The threaded portion is configured to be able to be screwed into the threaded hole of the boss 151 of the main bearing housing 15 . A clearance fit is formed between the lower surface of the head of the bolt 17 and the upper surface of the lug 126 . The sleeve 19 is also received in the mounting hole of the lug 126 of the fixed scroll 12 and a clearance fit is formed between the lower end surface of the sleeve 19 and the upper surface of the boss 151 . A certain gap may be reserved between the lower surface of the head of the bolt 17 and the upper surface of the lug 26 , so that the fixed scroll 12 can move a predetermined distance in the axial direction, thereby providing the scroll compressor 100 with axial flexibility.

图3示出了根据本公开的第一实施方式的涡旋机构的立体示意图，其中，定涡旋12包括沿其周向均匀分布的四个凸耳126，相邻的凸耳之间形成90°的夹角，而主轴承座15包括分别与定涡旋12的四个凸耳126在轴向上对准的四个凸台151，定涡旋12通过四个轴向柔性安装机构分别与各凸耳126及对应的凸台151的固定配合而安装至主轴承座15。也就是说，四个轴向柔性安装机构也沿着定涡旋12的周向方向均匀地分布，相邻的轴向柔性安装机构之间形成90°的夹角。对于包括螺栓17和套筒19的单个轴向柔性安装机构而言，其中螺栓17包括两个螺栓171、172，并且两个螺栓171、172均装配在一个套筒19中。FIG. 3 shows a schematic perspective view of the scroll mechanism according to the first embodiment of the present disclosure, wherein the fixed scroll 12 includes four lugs 126 evenly distributed along its circumferential direction, with 90 formed between adjacent lugs. °, and the main bearing seat 15 includes four bosses 151 that are respectively aligned with the four lugs 126 of the fixed scroll 12 in the axial direction, and the fixed scroll 12 is respectively connected to the fixed scroll 12 through four axial flexible installation mechanisms. Each lug 126 and the corresponding boss 151 are fixedly fitted to the main bearing seat 15 . That is to say, the four axially flexible mounting mechanisms are also evenly distributed along the circumferential direction of the fixed scroll 12, and an included angle of 90° is formed between adjacent axially flexible mounting mechanisms. For a single axially flexible mounting mechanism comprising a bolt 17 and a sleeve 19 , wherein the bolt 17 includes two

bolts

171 , 172 , and both

bolts

171 , 172 fit in one sleeve 19 .

图4示出了根据本公开的第一实施方式的涡旋机构的径向剖视图。轴向柔性安装机构的套筒19具有大致跑道形的径向横截面，其在径向方向上的尺寸小于其在切向方向上的尺寸。套筒19具有沿切向方向分布的两个轴向通孔191、192，两个螺栓171、172分别***套筒19的两个轴向通孔191、192中。相应地，定涡旋12的每个凸耳126具有与套筒19的外周面相匹配的在径向横截面上呈大致跑道形的安装孔127，用于容纳该套筒19及其螺栓穿过。另外，用于承载套筒19的主轴承座15的凸台151也具有与套筒19的大致跑道形的径向横截面相适应的径向横截面形状，即凸台151的径向横截面沿径向方向的尺寸也小于其沿切线方向的尺寸。4 shows a radial cross-sectional view of the scroll mechanism according to the first embodiment of the present disclosure. The sleeve 19 of the axially flexible mounting mechanism has a generally racetrack-shaped radial cross-section whose dimension in the radial direction is smaller than its dimension in the tangential direction. The sleeve 19 has two axial through

holes

191 , 192 distributed along the tangential direction, and the two

bolts

171 , 172 are inserted into the two axial through

holes

191 , 192 of the sleeve 19 , respectively. Accordingly, each lug 126 of the fixed scroll 12 has a substantially racetrack-shaped mounting hole 127 in radial cross-section matching the outer peripheral surface of the sleeve 19 for receiving the sleeve 19 and its bolts therethrough . In addition, the bosses 151 of the main bearing housing 15 for carrying the sleeve 19 also have a radial cross-sectional shape adapted to the substantially racetrack-shaped radial cross-section of the sleeve 19 , ie the radial cross-section of the bosses 151 . The dimension in the radial direction is also smaller than its dimension in the tangential direction.

参见图5所示的定涡旋12的一个凸耳126处(图4中的B部分)的细节放大图，套筒19装配在凸耳126的安装孔127中，套筒19包括在切向方向上的两个第一端部P1、P2和在径向方向上的两个第二端部Q1、Q2。两个第一端部P1、P2与凸耳126的安装孔127的内侧壁形成小间隙配合，两个第二端部Q1、Q2与凸耳126的安装孔127的内侧壁形成间隙配合并且形成径向间隙d1。需要说明的是，在本文中，小间隙配合是指：在套筒未受到载荷的情况下，第一端部P1、P2与凸耳126的安装孔127的内侧壁之间存在极小的间隙或者第一端部P1、P2与凸耳126的安装孔127的内侧壁接触但在接触面上不产生任何作用力；在套筒受到载荷的情况下，第一端部P1、P2与凸耳126的安装孔127的内侧壁能够发生接触并且在接触面上产生作用力。而间隙配合是指：无论套筒是否受到载荷，两个第二端部Q1、Q2均不与凸耳126的安装孔127的内侧壁接触。Referring to the enlarged detail view of one lug 126 of the fixed scroll 12 (part B in FIG. 4 ) shown in FIG. 5 , the sleeve 19 is fitted in the mounting hole 127 of the lug 126 , and the sleeve 19 is included in the tangential direction Two first ends P1, P2 in direction and two second ends Q1, Q2 in radial direction. The two first ends P1, P2 form a small clearance fit with the inner sidewall of the mounting hole 127 of the lug 126, and the two second ends Q1, Q2 form a clearance fit with the inner sidewall of the mounting hole 127 of the lug 126 and form a clearance fit. Radial clearance d1. It should be noted that, in this article, the small clearance fit refers to: when the sleeve is not under load, there is a very small gap between the first end parts P1, P2 and the inner wall of the mounting hole 127 of the lug 126 Or the first ends P1, P2 are in contact with the inner side walls of the mounting holes 127 of the lugs 126 but do not generate any force on the contact surface; when the sleeve is loaded, the first ends P1, P2 and the lugs The inner sidewalls of the mounting holes 127 of 126 can come into contact and generate a force on the contact surface. The clearance fit means that no matter whether the sleeve is loaded or not, the two second ends Q1 and Q2 are not in contact with the inner side walls of the mounting holes 127 of the lugs 126 .

下面结合图6所示的根据本公开的第一实施方式的涡旋机构的切向剖视图以及图8所示的现有技术中的涡旋机构的径向剖视图来说明本公开的第一实施方式中的轴向柔性安装机构与现有技术中的轴向柔性安装机构的受力情况区别，从而对本公开中的轴向柔性安装机构如何实现在保证其强度的同时减小其径向尺寸的效果进行说明。The first embodiment of the present disclosure will be described below with reference to the tangential cross-sectional view of the scroll mechanism according to the first embodiment of the present disclosure shown in FIG. 6 and the radial cross-sectional view of the scroll mechanism in the prior art shown in FIG. 8 . The axially flexible mounting mechanism in the present disclosure is different from the axially flexible mounting mechanism in the prior art in terms of force, so how can the axially flexible mounting mechanism in the present disclosure achieve the effect of reducing its radial size while ensuring its strength Be explained.

参见图8，现有的涡旋机构同样包括定涡旋2、动涡旋3和轴向柔性安装机构。定涡旋2具有沿其周向均匀分布的四个凸耳26并且四个轴向柔性安装机构分别安装在四个凸耳26的安装孔中。与本公开的第一实施方式的区别在于，每个轴向柔性安装机构包括一个套筒9和一个螺栓7。套筒9大致呈圆筒形，具有环形的径向横截面，而螺栓7则插置在套筒9中央的安装孔中。相应地，凸耳26的安装孔也具有圆形的径向横截面，从而与套筒9的圆筒形的外轮廓相匹配。Referring to FIG. 8 , the existing scroll mechanism also includes a fixed scroll 2 , a movable scroll 3 and an axially flexible installation mechanism. The fixed scroll 2 has four lugs 26 evenly distributed along its circumference and four axially flexible mounting mechanisms are respectively installed in the mounting holes of the four lugs 26 . The difference from the first embodiment of the present disclosure is that each axially flexible mounting mechanism includes one sleeve 9 and one bolt 7 . The sleeve 9 is substantially cylindrical with an annular radial cross-section, and the bolt 7 is inserted in a central mounting hole of the sleeve 9 . Correspondingly, the mounting holes of the lugs 26 also have a circular radial cross-section so as to match the cylindrical outer contour of the sleeve 9 .

在动涡旋3相对于定涡旋2绕动时，产生了作用于套筒9的作用力F(图中未示出)，该作用力F包括沿切向方向的作用力和沿径向方向的作用力F1。尤其是沿径向方向分布的作用力F1通过套筒9传递给螺栓7，从而在螺栓7与主轴承座的凸台的连接处产生弯矩和应力。为了防止此处的弯矩和应力导致螺栓7和/或主轴承座的凸台发生断裂失效，通常需要选择大尺寸的螺栓并且将主轴承座的凸台的径向尺寸设计得较大，从而确保螺栓7和主轴承座具有足够的强度以承受载荷。显然这种设计不利于减小压缩机的径向尺寸，与压缩机的小型化趋势相违背。When the movable scroll 3 orbits relative to the fixed scroll 2, a force F (not shown in the figure) acting on the sleeve 9 is generated, and the force F includes a force in the tangential direction and a force in the radial direction. The force F1 in the direction. In particular, the force F1 distributed in the radial direction is transmitted to the bolt 7 through the sleeve 9, so that bending moments and stresses are generated at the connection of the bolt 7 with the boss of the main bearing seat. In order to prevent the bending moment and stress here from causing fracture failure of the bolt 7 and/or the boss of the main bearing seat, it is usually necessary to select a large size bolt and design the radial dimension of the boss of the main bearing seat to be larger, so that Make sure that the bolts 7 and the main bearing housing are strong enough to carry the load. Obviously, this design is not conducive to reducing the radial size of the compressor, which is contrary to the miniaturization trend of the compressor.

与之相比，根据本公开的第一实施方式的轴向柔性安装机构采用了具有大致呈跑道形的径向横截面的套筒19，并且每个套筒19中沿切向方向装配有两个螺栓171、172。由于套筒19在切向方向上的两个第一端部P1、P2能够与定涡旋12的凸耳126接触，而套筒19的在径向方向上的两个第二端部Q1、Q2不能与凸耳126接触，作用在本公开的套筒19上的作用力基本上转变为仅沿切向分布的作用力F2。也就是说，作用在套筒19上的径向作用力大大减小，因此在螺栓与主轴承座的连接处所述产生的弯矩和应力也极大地减小。另一方面，在切向方向上，螺栓171、172构成的双螺栓结构能够更好地平衡弯矩，使得产生的应力较小。具体地，在单螺栓结构的情况下，由于套筒受到切向方向的载荷而产生弯矩，螺栓7的杆部处产生一对拉应力和压应力形成的力偶来平衡该弯矩，由于该拉应力区域和压应力区域距离很近(约为螺栓7的杆部直径的二分之一)，因此产生的应力较大。而在根据本公开的双螺栓的情况下，两个螺栓171、172中的一者产生拉应力而另一者产生压应力来协同产生平衡弯矩的力偶，由于两个螺栓171、172之间的距离d2较大，因此产生的应力较小。。因此，将单个螺栓171或172与螺栓7相比，在轴向柔性安装机构总的强度需求基本相同的情况下，单个螺栓171或172的所需尺寸相对于螺栓7的所需尺寸减小。In contrast, the axially flexible mounting mechanism according to the first embodiment of the present disclosure employs sleeves 19 having a generally racetrack-shaped radial cross-section, and each sleeve 19 has two tangentially fitted therein.

bolts

171 and 172. Since the two first ends P1, P2 of the sleeve 19 in the tangential direction can be in contact with the lugs 126 of the fixed scroll 12, and the two second ends Q1, P2 of the sleeve 19 in the radial direction Q2 cannot come into contact with lug 126, and the force acting on sleeve 19 of the present disclosure is substantially converted into force F2 that is distributed only tangentially. That is to say, the radial forces acting on the sleeve 19 are greatly reduced, and therefore the bending moments and stresses generated at the connection of the bolts to the main bearing housing are also greatly reduced. On the other hand, in the tangential direction, the double-bolt structure formed by the

bolts

171 and 172 can better balance the bending moment, so that the generated stress is smaller. Specifically, in the case of a single-bolt structure, since the sleeve is subjected to a load in the tangential direction, a bending moment is generated, and a couple of tensile stress and compressive stress is generated at the shank of the bolt 7 to balance the bending moment. The distance between the tensile stress region and the compressive stress region is very close (about one-half of the diameter of the shank of the bolt 7), so the generated stress is relatively large. Whereas in the case of the double-bolt according to the present disclosure, one of the two

bolts

171 , 172 generates tensile stress and the other generates compressive stress to cooperatively generate a couple of equilibrium bending moments, due to the difference between the two

bolts

171 , 172 The distance d2 is larger, so the resulting stress is smaller. . Therefore, comparing a

single bolt

171 or 172 with bolt 7, the required size of a

single bolt

171 or 172 is reduced relative to the required size of bolt 7 while the overall strength requirements of the axially flexible mounting mechanism are substantially the same.

另外，对于主轴承座15的凸台151而言，由于其在切向方向上的尺寸比在径向方向上的尺寸大，因此其在切向方向上的强度更大，这也与凸台151所受的载荷方向相匹配。也就是说，在主轴承座的凸台受到较大载荷的方向上(即切向方向上)，凸台的强度较大；在主轴承座的凸台受到较小载荷的方向上(即径向方向上)，凸台的强度也较小。因此，相较于图8所示的现有的涡旋压缩机中的凸台，凸台151的径向尺寸也得以减小。In addition, for the boss 151 of the main bearing seat 15, since its size in the tangential direction is larger than that in the radial direction, its strength in the tangential direction is greater, which is also consistent with the boss 151 to match the direction of the load. That is to say, in the direction where the boss of the main bearing seat is subjected to a larger load (that is, in the tangential direction), the strength of the boss is greater; in the direction where the boss of the main bearing seat is subjected to a smaller load (ie, the diameter upward direction), the strength of the boss is also less. Therefore, compared with the boss in the conventional scroll compressor shown in FIG. 8 , the radial dimension of the boss 151 is also reduced.

本公开通过减小螺栓的尺寸以及优化套筒、主轴承座的设计，能够减小轴向柔性机构以及主轴承座(凸台)的径向尺寸，优化压缩机的内部空间设计，有利于压缩机的小型化。By reducing the size of the bolt and optimizing the design of the sleeve and the main bearing seat, the present disclosure can reduce the radial dimension of the axial flexible mechanism and the main bearing seat (boss), optimize the design of the internal space of the compressor, and is conducive to compression machine miniaturization.

下面参照图5和图10对根据本公开的第一实施方式及其变形示例的轴向柔性安装机构的具体结构进行描述。参见图5所示的第一实施方式，从径向横截面上来看，第一端部P1构造为圆弧段S1，第二端部Q1构造为直线段S3，第一端部P1与第二端部Q1通过第一端部P1与第二端部Q1之间的过渡段S2连接，过渡段S2构造为圆弧段S1的延长弧段并且与直线段S3相切，也就是说，过渡段S2以与圆弧段S1的曲率半径相同的曲率半径朝向直线段S3延伸。另一个第一端部P2和另一个第二端部Q2分别与第一端部P1和第二端部Q1的结构相同。用于插置螺栓171、172的套筒19的两个轴向通孔191、192定位成分别靠近两个第一端部P1、P2，两个螺栓171、172之间相距距离d2。另外，假设两个螺栓171、172的径向横截面上的圆心在连线l上，该连线l与轴向通孔192的周向轮廓线的交点为R1、与圆弧段S1的交点为R2、与安装孔127的周向轮廓线的交点为R3(当第一端部P2与凸耳126接触时，交点R2与交点R3重合)并且与凸耳126的外周轮廓线的交点为R4。其中，R1与R2之间的距离为h1，R3与R4之间的距离为h2。当然，在第一端部P1处也具有与第一端部P2处类似的结构。也就是说，第一端部分别与套筒19的最靠近该第一端部的轴向通孔的切向侧壁相距距离h1，即第一端部与最靠近该第一端部的套筒19的轴向通孔之间的套筒19的在切向方向上的侧壁厚度为h1，而凸耳126具有与第一端部相邻的切向侧端部128该切向侧端部128在切向方向上的侧壁厚度为h2。The specific structure of the axially flexible mounting mechanism according to the first embodiment of the present disclosure and its modified example will be described below with reference to FIGS. 5 and 10 . Referring to the first embodiment shown in FIG. 5 , viewed from a radial cross section, the first end P1 is configured as a circular arc segment S1 , the second end Q1 is configured as a straight segment S3 , and the first end P1 is connected to the second The end Q1 is connected by a transition segment S2 between the first end P1 and the second end Q1, the transition segment S2 is configured as an extension of the circular segment S1 and is tangent to the straight segment S3, that is to say, the transition segment S2 extends towards straight line segment S3 with the same radius of curvature as that of arc segment S1. The other first end portion P2 and the other second end portion Q2 have the same structures as the first end portion P1 and the second end portion Q1, respectively. The two axial through

holes

191 , 192 of the sleeve 19 for inserting the

bolts

171 , 172 are located close to the two first ends P1 , P2 respectively, with a distance d2 between the two

bolts

171 , 172 . In addition, it is assumed that the center of the circle on the radial cross section of the two

bolts

171 and 172 is on the connecting line l, and the intersection point of the connecting line l and the circumferential contour line of the axial through hole 192 is R1 and the intersection point with the arc segment S1 R2, the intersection point with the peripheral contour line of the mounting hole 127 is R3 (when the first end P2 is in contact with the lug 126, the intersection point R2 and the intersection point R3 coincide) and the intersection point with the outer peripheral contour line of the lug 126 is R4 . Among them, the distance between R1 and R2 is h1, and the distance between R3 and R4 is h2. Of course, the first end portion P1 also has a similar structure to that at the first end portion P2. That is to say, the first ends are respectively separated from the tangential side walls of the axial through holes of the sleeve 19 closest to the first end by a distance h1, that is, the first end and the sleeve closest to the first end are separated by a distance h1. The thickness of the side walls of the sleeve 19 in the tangential direction between the axial through holes of the barrel 19 is h1, while the lugs 126 have a tangential side end 128 adjacent to the first end. The side wall thickness of the portion 128 in the tangential direction is h2.

为了尽可能地减小作用在套筒上的沿径向方向的力而使得作用在套筒上的力基本上仅沿切向方向分布，优选地，圆弧段S1的延伸角度α小于100°，也就是说，套筒的第一端部与定涡旋的凸耳接触的角度小于100°。另外，在现有技术中套筒与定涡旋的凸耳大多为间隙配合安装，其间隙通常小于0.05mm，优选地，在本公开中，第二端部Q1、Q2与凸耳126的安装孔127的内侧壁之间的径向间隙d1大于0.1mm，从而确保第二端部Q1、Q2不与定涡旋发生接触，以便尽可能地减小作用在套筒上的沿径向方向的力。第二端部Q1、Q2和过渡段S2与凸耳126之间的间隙可以通过对安装孔127的内侧壁进行适当的切除材料而获得，从而更加方便灵活调整安装孔的尺寸，能够适用于更多尺寸的套筒。例如，参见图5，安装孔127被切割成其径向横截面构造为由一定角度的圆弧和切线组成，该圆弧与套筒的圆弧段S1相切但其曲率半径大于圆弧段S1的曲率半径，而该切线与直线段S3平行并且与直线段S3之间的距离为间隙d1。另外，为了加强双螺栓结构平衡弯矩的效果，在套筒的总切向长度不变的情况下，优选地将两个螺栓设置成各自尽可能靠近套筒的切向最外侧，两个螺栓之间的切向距离d2可以大于2.1倍的螺栓杆部的直径且小于5倍的螺栓杆部的直径，从而在尽可能减小螺栓所受弯矩的同时保证轴向柔性安装机构的强度以及对压缩机内部空间的良好利用。另一方面，为了保证与轴向柔性安装机构配合的定涡旋及主轴承座的强度，套筒19的侧壁厚度h1和凸耳126的切向侧端部128的侧壁厚度h2需要大于0.3倍的螺栓杆部的直径。In order to minimize the force acting on the sleeve in the radial direction so that the force acting on the sleeve is distributed substantially only in the tangential direction, preferably, the extension angle α of the arc segment S1 is less than 100° , that is, the angle at which the first end of the sleeve contacts the lugs of the fixed scroll is less than 100°. In addition, in the prior art, the lugs of the sleeve and the fixed scroll are mostly installed with clearance fit, and the gap is usually less than 0.05mm. Preferably, in the present disclosure, the second ends Q1 and Q2 are installed with the lugs 126 The radial gap d1 between the inner side walls of the hole 127 is greater than 0.1 mm, so as to ensure that the second ends Q1, Q2 do not come into contact with the fixed scroll, so as to reduce the radial direction acting on the sleeve as much as possible. force. The gaps between the second ends Q1, Q2, the transition section S2 and the lugs 126 can be obtained by appropriately cutting material from the inner side walls of the mounting holes 127, so that it is more convenient and flexible to adjust the size of the mounting holes, which can be applied to more Multiple size sockets. For example, referring to FIG. 5, the mounting hole 127 is cut so that its radial cross-section is configured to consist of an angled arc and a tangent that is tangent to the arc segment S1 of the sleeve but has a larger radius of curvature than the arc segment. The radius of curvature of S1, and this tangent is parallel to the straight line segment S3 and the distance from the straight line segment S3 is the gap d1. In addition, in order to enhance the effect of balancing the bending moment of the double-bolt structure, under the condition that the total tangential length of the sleeve remains unchanged, it is preferable to arrange the two bolts as close as possible to the outermost tangential direction of the sleeve, and the two bolts The tangential distance d2 between them can be greater than 2.1 times the diameter of the bolt shank and less than 5 times the diameter of the bolt shank, so as to reduce the bending moment of the bolt as much as possible while ensuring the strength of the axially flexible installation mechanism and Good use of the internal space of the compressor. On the other hand, in order to ensure the strength of the fixed scroll and the main bearing seat matched with the axially flexible mounting mechanism, the thickness h1 of the side wall of the sleeve 19 and the thickness h2 of the side wall of the tangential side end 128 of the lug 126 need to be greater than 0.3 times the diameter of the bolt shank.

本领域技术人员可以理解的是，虽然在图3和图4中均示出为定涡旋通过沿其周向均匀分布的四个凸耳以及四个轴向柔性安装机构安装至主轴承座的对应的四个凸台，但在单个涡旋压缩机中，轴向柔性安装机构的个数并不局限于四个，而可以是三个或其他合适的个数。It can be understood by those skilled in the art that although both of FIGS. 3 and 4 show that the fixed scroll is mounted to the main bearing housing through four lugs evenly distributed along its circumference and four axially flexible mounting mechanisms Corresponding to four bosses, but in a single scroll compressor, the number of axially flexible mounting mechanisms is not limited to four, but may be three or other suitable numbers.

图7示出了根据本公开的第二实施方式的涡旋机构的径向剖视图，其中，定涡旋22具有沿其周向均匀分布的三个凸耳226，相邻的两个凸耳226之间间隔120°。三个轴向柔性安装机构分别***三个凸耳226中，从而将定涡旋22安装至主轴承座。与第一实施方式类似，轴向柔性安装机构也包括具有大致呈跑道形的径向横截面的套筒29和插置在套筒29中的两个螺栓271、272。7 shows a radial cross-sectional view of the scroll mechanism according to the second embodiment of the present disclosure, wherein the fixed scroll 22 has three lugs 226 evenly distributed along its circumference, and two adjacent lugs 226 120° apart. Three axially flexible mounting mechanisms are inserted into the three lugs 226, respectively, to mount the fixed scroll 22 to the main bearing housing. Similar to the first embodiment, the axially flexible mounting mechanism also comprises a sleeve 29 with a generally racetrack-shaped radial cross-section and two

bolts

271 , 272 inserted in the sleeve 29 .

图9a和图9b示出了如图8所示的现有技术、如图6所示的第一实施方式以及如图7所示的第二实施方式中的轴向柔性安装机构的受力及弯矩情况。其中，X代表沿切向方向，而Y代表沿径向方向。如图9a所示，在现有技术中，随着动涡旋围绕定涡旋的扰动，作用在套筒上的力在垂直于轴向方向的平面内几乎均匀分布，也就是说，作用在套筒上的力既包括沿径向方向的力，也包括沿切向方向的力，并且沿径向方向的力和沿径向方向的力的大小基本上一致。而在如图6所示的第一实施方式以及如图7所示的第二实施方式中，作用在套筒上的力转变为几乎仅沿着切向方向分布，而沿着径向方向分布的力大大减小。另一方面，如图9b所示，根据本公开的第一实施方式和第二实施方式中的螺栓上形成的弯矩也相较于现有技术极大的减小。Figures 9a and 9b show the forces and forces of the axially flexible mounting mechanism in the prior art shown in Figure 8, the first embodiment shown in Figure 6, and the second embodiment shown in Figure 7 Bending moment condition. where X represents the tangential direction and Y represents the radial direction. As shown in Fig. 9a, in the prior art, with the disturbance of the movable scroll around the fixed scroll, the force acting on the sleeve is almost uniformly distributed in the plane perpendicular to the axial direction, that is, acting on the The force on the sleeve includes both the force in the radial direction and the force in the tangential direction, and the magnitude of the force in the radial direction and the force in the radial direction are substantially the same. Whereas in the first embodiment as shown in FIG. 6 and the second embodiment as shown in FIG. 7 , the force acting on the sleeve is transformed to be distributed almost only in the tangential direction, but in the radial direction force is greatly reduced. On the other hand, as shown in FIG. 9b , the bending moments formed on the bolts in the first and second embodiments according to the present disclosure are also greatly reduced compared to the prior art.

由于在本公开中套筒在径向方向上的受力大大减小，螺栓所受的弯矩也大幅减小，在压缩机总的承载强度需求不变的情况下，可以减小螺栓的尺寸以及减小套筒、定涡旋的凸耳和主轴承座的凸台在径向方向上的尺寸，从而利于实现压缩机的小型化。例如，在如图8所示的现有技术中，采用沿着定涡旋的周向均匀布置的四个轴向柔性安装机构，包含四个型号为M11的螺栓，而压缩机的壳外径达到225mm。在如图6所示的本公开的第一实施方式中，采用沿着定涡旋的周向均匀布置的四个轴向柔性安装机构，包含八个型号仅为M8的螺栓，压缩机的壳外径可以仅为190mm，减少并节省了约16％的径向尺寸和材料。而在如图7所示的本公开的第二实施方式中，采用了采用沿着定涡旋的周向均匀布置的三个轴向柔性安装机构，包含六个型号仅为M9的螺栓，压缩机的壳外径可以仅为200mm，减少并节省了约11％的径向尺寸和材料。另外，由于螺栓所受的弯矩大幅减小，压缩机的可靠性也进一步的提高。Since the force of the sleeve in the radial direction is greatly reduced in the present disclosure, the bending moment of the bolt is also greatly reduced, and the size of the bolt can be reduced under the condition that the total bearing strength requirement of the compressor remains unchanged. In addition, the dimensions of the sleeve, the lugs of the fixed scroll and the bosses of the main bearing seat in the radial direction are reduced, thereby facilitating the miniaturization of the compressor. For example, in the prior art as shown in Fig. 8, four axially flexible mounting mechanisms uniformly arranged along the circumference of the fixed scroll are used, including four bolts of M11 type, and the outer diameter of the compressor casing is up to 225mm. In the first embodiment of the present disclosure as shown in FIG. 6 , four axial flexible mounting mechanisms uniformly arranged along the circumferential direction of the fixed scroll are adopted, including eight bolts of only M8 size, and the casing of the compressor is The outer diameter can be as little as 190mm, reducing and saving about 16% in radial dimension and material. However, in the second embodiment of the present disclosure as shown in FIG. 7 , three axially flexible mounting mechanisms uniformly arranged along the circumferential direction of the fixed scroll are adopted, including six bolts of only M9 type, which are compressed The outer diameter of the casing of the machine can be only 200mm, reducing and saving about 11% of the radial dimension and material. In addition, the reliability of the compressor is further improved because the bending moment of the bolt is greatly reduced.

图10示出了根据本公开的轴向柔性安装机构的变形示例。与第一实施方式类似，该变形示例中的轴向柔性安装机构包括具有大致呈跑道形的径向横截面的套筒39和分别插置在套筒39的两个沿切向方向分布的轴向通孔中的两个螺栓371、372。套筒39包括在切向方向上的两个第一端部P'1、P'2和在径向方向上的两个第二端部Q'1、Q'2，并且两个第一端部P'1、P'2可以与定涡旋的凸耳326的安装孔327的内侧壁接触，而两个第二端部Q'1、Q'2不与定涡旋的凸耳326的安装孔327的内侧壁接触。具体地，从径向横截面上来看，第一端部P'1构造为圆弧段S'1，第二端部Q'1构造为直线段S'3，第一端部P'1与第二端部Q'1通过第一端部P'1与第二端部Q'1之间的过渡段S'2连接，并且过渡段S'2也不与定涡旋的凸耳326的安装孔327的内侧壁接触。与第一实施方式不同的是，过渡段S'2并不是构造为圆弧段S'1的延长弧段，而是构造为曲率半径比圆弧段S'1更小的圆弧段并且与直线段S'3相切。也就是说，在加工制造过程中，可以首先制造出与凸耳326的安装孔327的内侧壁相匹配的套筒加工件(也就是说，如果将套筒加工件***凸耳326的安装孔327内，套筒加工件的整个外周面都能够与凸耳326的安装孔327的内侧壁接触)，然后通过对套筒加工件的外周面进行适当切除材料，即对套筒加工件的除第一端部P'1、P'2外的部分进行适当切除材料，从而形成不与定涡旋接触的第二端部Q'1、Q'2和过渡段S'2以获得所需的套筒成品。FIG. 10 shows a modified example of an axially flexible mounting mechanism according to the present disclosure. Similar to the first embodiment, the axially flexible mounting mechanism in this modified example includes a sleeve 39 having a substantially racetrack-shaped radial cross-section and two tangentially distributed shafts respectively inserted in the sleeve 39 To the two

bolts

371, 372 in the through holes. The sleeve 39 comprises two first ends P'1, P'2 in the tangential direction and two second ends Q'1, Q'2 in the radial direction, and the two first ends The parts P'1, P'2 may be in contact with the inner side walls of the mounting holes 327 of the lugs 326 of the fixed scroll, while the two second end parts Q'1, Q'2 are not in contact with the lugs 326 of the fixed scroll. The inner side walls of the mounting holes 327 are in contact. Specifically, from a radial cross-section, the first end P'1 is configured as a circular arc segment S'1, the second end Q'1 is configured as a straight segment S'3, and the first end P'1 and the The second end Q'1 is connected by a transition S'2 between the first end P'1 and the second end Q'1, and the transition S'2 is also not connected to the lugs 326 of the fixed scroll. The inner side walls of the mounting holes 327 are in contact. Unlike the first embodiment, the transition segment S'2 is not configured as an extended arc segment of the circular arc segment S'1, but as a circular arc segment with a radius of curvature smaller than that of the circular segment S'1 and is the same as that of the circular segment S'1. The straight line segment S'3 is tangent. That is to say, in the manufacturing process, a sleeve machining piece that matches the inner side wall of the mounting hole 327 of the lug 326 can be manufactured first (that is, if the sleeve machining piece is inserted into the mounting hole of the lug 326 327, the entire outer peripheral surface of the sleeve processing part can be in contact with the inner side wall of the mounting hole 327 of the lug 326), and then the outer peripheral surface of the sleeve processing part is appropriately cut off the material, that is, the removal of the sleeve processing part. The parts outside the first end parts P'1, P'2 are appropriately cut off material, thereby forming the second end parts Q'1, Q'2 and the transition section S'2 which are not in contact with the fixed scroll to obtain the desired Finished sleeve.

该变形示例所示的轴向柔性安装部件不仅能够实现与第一实施方式中的轴向柔性安装部件类似的减小螺栓尺寸、减小定涡旋和主轴承座的凸台的径向尺寸的效果，而且其中套筒更便于生产制造、适应性更好。The axially flexible mounting member shown in this modified example can not only realize the reduction of the bolt size and the radial size of the boss of the fixed scroll and the main bearing seat similar to the axially flexible mounting member in the first embodiment. In addition, the sleeve is more convenient to manufacture and has better adaptability.

在以上描述的实施方式中，通过套筒的大致呈跑道形的径向横截面设计结合双螺栓结构，实现减小套筒的径向受力、减小螺栓所受弯矩从而减小轴向柔性安装机构、定涡旋以及主轴承座的径向尺寸的效果。然而，本领域技术人员可以想到的是，对于具有大致呈跑道形的径向横截面的套筒，不仅可以与双螺栓配合，还可以与大于两个的多个螺栓配合，只要能够起到减小套筒的径向受力和/或减小螺栓所受弯矩的效果即可。也就是说，设置在套筒中的螺栓数量并不限于两个。本领域技术人员还可以想到，轴向柔性安装机构中的用于连接定涡旋与主轴承座的构件并不限于螺栓，而可以是螺钉或其他任何能够实现相似作用的紧固件。In the above-described embodiment, the radial force of the sleeve is reduced, the bending moment of the bolt is reduced, and the axial direction is reduced by combining the radial cross-section design of the sleeve with the double-bolt structure. The effect of the flexible mounting mechanism, fixed scroll, and radial dimensions of the main bearing housing. However, those skilled in the art can imagine that, for a sleeve with a substantially racetrack-shaped radial cross-section, it is possible to cooperate not only with double bolts, but also with multiple bolts greater than two, as long as the reduction can be achieved. The radial force of the small sleeve and/or the effect of reducing the bending moment of the bolt is sufficient. That is, the number of bolts provided in the sleeve is not limited to two. Those skilled in the art can also imagine that the components used to connect the fixed scroll and the main bearing seat in the axial flexible mounting mechanism are not limited to bolts, but may be screws or any other fasteners that can achieve similar functions.

虽然已经参照示例性实施方式对本公开进行了描述，但是应当理解，本公开并不局限于文中详细描述和示出的具体实施方式，在不偏离权利要求书所限定的范围的情况下，本领域技术人员可以对示例性实施方式做出各种改变。还应理解的是，在技术方案不矛盾的情况下，各个实施方式的特征可以相互结合或者可以省去。Although the present disclosure has been described with reference to exemplary embodiments, it is to be understood that the present disclosure is not limited to the specific embodiments described and illustrated in detail herein, without departing from the scope defined by the claims. Various changes can be made to the exemplary embodiments by skilled persons. It should also be understood that, under the condition that the technical solutions are not contradictory, the features of the various embodiments may be combined with each other or may be omitted.

Claims

一种涡旋压缩机(100)，包括：A scroll compressor (100), comprising:

涡旋机构，所述涡旋机构包括定涡旋(12)和动涡旋(13)，所述动涡旋(13)构造成能够相对于所述定涡旋(12)绕动以对工作流体进行压缩；A scroll mechanism, the scroll mechanism includes a fixed scroll (12) and a movable scroll (13), the movable scroll (13) is configured to be able to orbit relative to the fixed scroll (12) for operation the fluid is compressed;

主轴承座(15)，所述主轴承座(15)支撑所述动涡旋(13)；以及a main bearing seat (15) supporting the orbiting scroll (13); and

轴向柔性安装机构，经由所述轴向柔性安装机构将所述定涡旋(12)连接至所述主轴承座(15)，使得所述定涡旋(12)能够沿轴向方向移动预定距离，An axially flexible mounting mechanism, via which the fixed scroll (12) is connected to the main bearing seat (15), so that the fixed scroll (12) can move in the axial direction by a predetermined amount distance,

所述轴向柔性安装机构包括紧固件(17、171、172、271、272、371、372)以及设置在所述紧固件外周的套筒(19、29、39)，The axially flexible installation mechanism includes fasteners (17, 171, 172, 271, 272, 371, 372) and sleeves (19, 29, 39) arranged on the outer periphery of the fasteners,

其特征在于，所述套筒的在切向方向上的尺寸大于在径向方向上的尺寸，并且，所述套筒装配有两个或更多个所述紧固件。It is characterised in that the dimension of the sleeve in the tangential direction is greater than the dimension in the radial direction, and in that the sleeve is fitted with two or more of the fasteners.
根据权利要求1所述的涡旋压缩机(100)，其特征在于，所述定涡旋(12)包括从所述定涡旋(12)的外周面沿径向向外突出的凸耳(126)，所述凸耳(126)具有供所述套筒穿过的安装孔(127)，所述套筒的在切向方向上的两个第一端部(P1、P2、P'1、P'2)能够与所述安装孔(127)的内侧壁接触，所述套筒的在径向方向上的两个第二端部(Q1、Q2、Q'1、Q'2)与所述安装孔(127)的内侧壁之间存在间隙，使得所述第二端部不与所述安装孔(127)的内侧壁接触。The scroll compressor (100) according to claim 1, wherein the fixed scroll (12) includes a lug (12) protruding radially outward from the outer peripheral surface of the fixed scroll (12). 126), the lug (126) has a mounting hole (127) through which the sleeve passes, the two first ends (P1, P2, P'1) of the sleeve in the tangential direction , P'2) can be in contact with the inner side wall of the mounting hole (127), and the two second ends (Q1, Q2, Q'1, Q'2) of the sleeve in the radial direction are in contact with There is a gap between the inner side walls of the mounting hole (127), so that the second end does not contact the inner side wall of the mounting hole (127).
根据权利要求2所述的涡旋压缩机，其特征在于，在所述套筒的径向横截面上，所述第一端部构造为圆弧段(S1、S'1)，所述第二端部构造为直线段(S3、S'3)，并且所述第一端部与所述第二端部之间通过过渡段(S2、S'2)连接，所述过渡段不与所述安装孔(127)的内侧壁接触。The scroll compressor according to claim 2, characterized in that, on the radial cross section of the sleeve, the first end is configured as a circular arc segment (S1, S'1), and the first end is configured as a circular arc segment (S1, S'1). The two ends are configured as straight sections (S3, S'3), and the first end and the second end are connected by a transition section (S2, S'2), which is not connected to all contact with the inner sidewall of the mounting hole (127).
根据权利要求3所述的涡旋压缩机，其特征在于：The scroll compressor according to claim 3, wherein:

所述过渡段(S2)构造为从所述圆弧段(S1)以与所述圆弧段(S1)的曲率半径相同的曲率半径朝向所述直线段(S3)延伸，并且与所述直线段(S3)相切；或者The transition segment (S2) is configured to extend from the circular arc segment (S1 ) with the same radius of curvature as the circular arc segment (S1 ) towards the straight line segment (S3), and is identical to the straight line segment (S3). segment (S3) is tangent; or

所述过渡段(S'2)构造为从所述圆弧段(S'1)以比所述圆弧段(S'1)的曲率半径小的曲率半径朝向所述直线段(S'3)延伸，并且与所述直线段(S'3)相切。The transition segment (S'2) is configured from the circular arc segment (S'1) to the straight segment (S'3) with a smaller radius of curvature than the circular arc segment (S'1) ) extends and is tangent to the straight line segment (S'3).
根据权利要求3所述的涡旋压缩机，其特征在于，所述圆弧段(S1、S'1)的延伸角度(α)小于100°。The scroll compressor according to claim 3, characterized in that, the extension angle (α) of the circular arc segments (S1, S'1) is less than 100°.
根据权利要求2至5中任一项所述的涡旋压缩机，其特征在于，所述第二端部与所述安装孔(127)的内侧壁之间的径向间隙(d1)大于0.1mm。The scroll compressor according to any one of claims 2 to 5, wherein the radial gap (d1) between the second end portion and the inner side wall of the mounting hole (127) is greater than 0.1 mm.
根据权利要求2至5中任一项所述的涡旋压缩机，其特征在于，所述凸耳(126)的与所述第一端部相邻的切向侧端部(128)在切向方向上的侧壁厚度(h2)大于所述紧固件的杆部的直径的30％。The scroll compressor according to any one of claims 2 to 5, wherein a tangential side end (128) of the lug (126) adjacent to the first end The sidewall thickness (h2) in the direction is greater than 30% of the diameter of the shank of the fastener.
根据权利要求2至5中任一项所述的涡旋压缩机，其特征在于，所述套筒包括用于装配所述紧固件的两个或更多个轴向通孔(191、192)，所述轴向通孔(191、192)在所述套筒中沿切向方向分布，所述套筒的介于所述第一端部与最靠近该第一端部的所述轴向通孔之间的在切向方向上的侧壁厚度(h1)大于所述紧固件的杆部的直径的30％。Scroll compressor according to any one of claims 2 to 5, wherein the sleeve comprises two or more axial through holes (191, 192 for assembling the fasteners) ), the axial through holes (191, 192) are distributed along the tangential direction in the sleeve, the sleeve between the first end and the shaft closest to the first end The side wall thickness (h1) in the tangential direction between the through holes is greater than 30% of the diameter of the shank of the fastener.
根据权利要求1至5中任一项所述的涡旋压缩机，其特征在于，所述紧固件为两个，两个所述紧固件之间的切向距离(d2)大于所述紧固件的杆部的直径的2.1倍并且小于所述紧固件的杆部的直径的5倍。The scroll compressor according to any one of claims 1 to 5, wherein there are two fasteners, and a tangential distance (d2) between two fasteners is greater than the 2.1 times the diameter of the shank of the fastener and less than 5 times the diameter of the shank of the fastener.
根据权利要求1至5中任一项所述的涡旋压缩机，其特征在于，所述涡旋压缩机设置有沿周向均匀分布的三个或四个所述轴向柔性安装机构。The scroll compressor according to any one of claims 1 to 5, wherein the scroll compressor is provided with three or four of the axially flexible mounting mechanisms uniformly distributed along the circumferential direction.