An orbiting scroll, a pump body assembly and a scroll compressor

Abstract

The application provides a movable scroll disc, a pump body assembly and a scroll compressor, wherein the movable scroll disc comprises a base plate, one side of the base plate is provided with movable scroll disc teeth, the middle part of the other side of the base plate is provided with a crankshaft sleeve setting hole, and the thickness H3 of the base plate at the bottom surface of the crankshaft sleeve setting hole is greater than the thickness H1 of the base plate at the edge. In this way, the middle part of the base plate is thick and the edge is thin. Compared with the conventional design, the thickness of the edge of the base plate is thin, the mass and the inertia tensor of the movable scroll disc can be reduced, the rotational moment excitation of the movable scroll disc can be reduced, and the noise and vibration of the whole machine can be reduced. In addition, the middle part of the base plate is thick, the central strength of the movable scroll disc can be enhanced, the strength of the movable scroll disc can be ensured, the deformation of the movable scroll disc can be reduced, the reliability of the movable scroll disc can be improved, and the reliability of the compressor is enhanced.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of compressor, in particular to a dynamic scroll plate, a pump body assembly and a scroll compressor. BACKGROUND

[0002] The scroll compressor is a kind of volumetric compression compressor, the compression component is composed of a dynamic scroll plate and a static scroll plate, and the relative revolution of the dynamic scroll plate and the static scroll plate is utilized to form the continuous change of the closed volume during the compression process, so as to realize the purpose of compressing gas. The rotation of the dynamic scroll plate is driven by the motor crankshaft, wherein the rotating dynamic scroll plate is located at the uppermost end of the crankshaft, and is in the form of a cantilever beam structure, which is easy to produce a large rotating torque excitation, thereby increasing the noise and vibration of the whole machine. SUMMARY

[0003] Therefore, the present application provides a dynamic scroll plate, a pump body assembly and a scroll compressor, and mainly solves the technical problem of how to reduce the rotating torque excitation of the dynamic scroll plate and reduce the noise and vibration of the whole machine.

[0004] In order to solve the above problems, the present application provides a dynamic scroll plate, which comprises a base plate, one side of the base plate is provided with a dynamic scroll plate tooth, and the middle of the other side of the base plate is provided with a crankshaft sleeve hole, and the thickness H3 of the base plate at the bottom surface of the crankshaft sleeve hole is greater than the thickness H1 of the edge of the base plate.

[0005] In some embodiments, the base plate has a base body, the middle of the other side of the base plate has a first protruding part protruding from the base body, and a first step groove is formed between the first protruding part and the base body of the base plate; wherein the bottom surface of the first step groove forms the edge of the base plate, and the crankshaft sleeve hole is located on the first protruding part.

[0006] In some embodiments, the middle of the first protruding part has a second protruding part, a second step groove is formed between the second protruding part and the body of the first protruding part, and the crankshaft sleeve hole is located on the second protruding part.

[0007] Wherein, the thickness of the base plate at the bottom surface of the second step groove is H2, and H3≥H2>H1.

[0008] In some embodiments, H2 / H1<3.

[0009] In some embodiments, the height of the dynamic scroll plate tooth protruding from one side of the base plate is H; wherein,

[0010] H>H3; and / or H / H1<5.

[0011] The present application also provides a pump body assembly, which comprises the dynamic scroll plate according to any one of the above.

[0012] In some embodiments, when the substrate has a base body, the middle part of the other side of the substrate has a first protruding part protruding from the base body, and a first step groove is formed between the first protruding part and the base body; the bottom surface of the first step groove forms the edge of the substrate, and the middle part of the first protruding part has a second protruding part, a second step groove is formed between the second protruding part and the base body, and the crankshaft sleeve hole is located on the second protruding part; the thickness of the substrate at the bottom surface of the second step groove is H2, and H3≥H2>H1, the pump body assembly further comprises a support for providing support to the orbiting scroll.

[0013] In some embodiments, the support only provides support to the orbiting scroll by supporting the bottom surface of the second step groove.

[0014] In some embodiments, the support has a first end, the first end has a first mounting groove for accommodating the substrate, the middle part of the bottom surface of the first mounting groove is provided with a second mounting groove for inserting the second protruding part; the bottom surface of the first mounting groove is further provided with a first annular protrusion and a second annular protrusion, both the first annular protrusion and the second annular protrusion are arranged around the second mounting groove, wherein an annular groove for mounting a cross slip ring is formed between the first annular protrusion and the second annular protrusion, the first annular protrusion is located inside the second annular protrusion, and the support supports the bottom surface of the second step groove through the end surface of the first annular protrusion.

[0015] Wherein the distance between the end surface of the first annular protrusion and the end surface of the first end is h2, the end surface of the second annular protrusion is opposite to the bottom surface of the first step groove, and the distance between the end surface of the second annular protrusion and the end surface of the first end is h1, h2-H2

[0016] In some embodiments, the center line of the first annular protrusion coincides with the center line of the support, and the outer diameter of the first annular protrusion is d2; wherein,

[0017] the center line of the first protruding part coincides with the center line of the orbiting scroll, and the outer diameter of the first protruding part is D2; D2≥d2;

[0018] And / or, the maximum outer diameter of the orbiting scroll tooth is D1, d2 / D1>0.5.

[0019] The present application also provides a scroll compressor comprising the orbiting scroll according to any one of the above-mentioned embodiments; or comprising the pump body assembly according to any one of the above-mentioned embodiments.

[0020] The application provides a movable scroll disc, a pump body assembly and a scroll compressor.

[0021] 1、The application makes the thickness H3 of the base plate at the bottom surface of the crankshaft sleeve hole greater than the thickness H1 of the base plate at the edge, so that the middle of the base plate is thick and the edge is thin. Compared with the conventional design, the thickness of the edge of the base plate is thin, so that the mass and the inertia tensor of the movable scroll disc can be reduced, the rotational moment excitation of the movable scroll disc is reduced, and the noise and vibration of the whole machine are reduced.

[0022] 2、Since the middle of the base plate is thicker than the edge, the central strength of the movable scroll disc is enhanced, the strength of the movable scroll disc is ensured, the deformation of the movable scroll disc is reduced, the reliability of the movable scroll disc is improved, and the reliability of the compressor is enhanced.

[0023] 3、Since the middle of the base plate is thicker than the edge, compared with the conventional design, the center of gravity of the movable scroll disc is reduced, the overturning moment of the movable scroll disc is reduced, and the operation stability of the movable scroll disc is improved. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. The drawings in the following description are only exemplary, and those skilled in the art can also obtain other drawings according to the provided drawings without creative labor.

[0025] Figure 1 is a structural schematic view of a movable scroll disc when H3=H2 according to an embodiment of the application;

[0026] Figure 2 is a structural schematic view of a movable scroll disc when H3>H2 according to an embodiment of the application;

[0027] Figure 3 is Figure 2 a size diagram of a movable scroll disc in the application;

[0028] Figure 4 is a partial structural schematic view of a scroll compressor according to an embodiment of the application;

[0029] Figure 5 is a structural schematic view of a bracket according to an embodiment of the application.

[0030] The drawings are as follows:

[0031] 1, static scroll; 2, dynamic scroll; 3, cross slide ring; 4, bracket; 5, sealing ring; 6, crankshaft; 2a, first step groove; 2b, second step groove; 4a, first end; 21, dynamic scroll tooth; 22, base plate; 22a, base body; 22b, first protruding part; 22c, second protruding part; 41, first annular protrusion; 42, second annular protrusion; 201, crankshaft sleeve hole; 221, bottom surface of first step groove; 222, bottom surface of second step groove; 223, bottom surface of crankshaft sleeve hole; 401, first mounting groove; 402, annular groove; 403, second mounting groove; 404, via hole; 411, end surface of first annular protrusion; 421, end surface of second annular protrusion. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. The description of the at least one exemplary embodiment is actually only illustrative, but not as any limitation on the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without any creative work are within the scope of protection of the present application.

[0033] In the description of the present application, it should be understood that the orientation words such as "front, back, up, down, left, right", "transverse, vertical, perpendicular, horizontal" and "top, bottom" and the like indicate the orientation or position relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate and imply that the indicated device or element must have a specific orientation or be constructed and operated in a specific orientation, therefore cannot be understood as a limitation on the scope of protection of the present application; the orientation words "inner, outer" refer to the inner and outer relative to the contour of each component.

[0034] For purposes of the description hereinafter, spatially relative terms, such as "above", "below", "up", "down", "right", "left", "vertical", "horizontal", "top", "bottom", "lateral", "longitudinal", "front", "rear", "anterior", "posterior", and the like, can be used to describe the relative position of one element, or features to another element, or feature, as illustrated in the figures. The spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" other elements or features would then be oriented "below" the other elements or features. Thus, the exemplary term "above" can encompass both an orientation of above and below. The device can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly. The terms "first", "second", "third", etc. do not necessarily indicate any ordinal, chronological or other sequence unless expressly stated otherwise.

[0035] In addition, it should be noted that the use of "first", "second", etc. words to qualify parts, is only for the convenience of distinguishing the corresponding parts, and the above words have no special meaning unless otherwise stated, and therefore cannot be understood as limiting the scope of protection of the present application.

[0036] With reference to the accompanying drawings Figures 1-3 As shown, according to the embodiment of the present application, a moving scroll 2 is provided, which comprises a base plate 22, one side of the base plate 22 is provided with a moving scroll tooth 21, and a middle part of the other side of the base plate 22 is provided with a crankshaft sleeve hole 201. The base plate 22 can be sleeved on the eccentric shaft section of the crankshaft 6 through the crankshaft sleeve hole 201, so that the crankshaft 6 can drive the moving scroll 2 to move through the eccentric shaft section. Wherein, a bearing is generally sleeved between the crankshaft sleeve hole 201 and the eccentric shaft section, so that the eccentric shaft section can drive the moving scroll 2 to move through the bearing, at this time, the part where the crankshaft sleeve hole 201 is located can also be called a bearing seat.

[0037] Wherein, the thickness H3 of the base plate 22 at the bottom surface 223 of the crankshaft sleeve hole is greater than the thickness H1 of the edge of the base plate 22, so that the middle part of the base plate 22 is thick and the edge is thin. Compared with the conventional design, the thickness of the edge of the base plate 22 is thinner, which can reduce the mass and the inertia tensor of the moving scroll 2, so as to reduce the rotational moment excitation of the moving scroll 2, and reduce the noise and vibration of the whole machine.

[0038] The following Table 1 provides a comparison between the present application and a conventional scheme in terms of the mass, coordinate system inertia tensor, center of mass inertia tensor, and principal inertia moment of the orbiting scroll 2. In the present application, H3>H1. In the conventional scheme, H3=H1. As can be seen from Table 1, by making H3>H1, the mass, inertia tensor (including the coordinate system inertia tensor and the center of mass inertia tensor), and the principal inertia moment of the orbiting scroll 2 are all reduced to some extent, which reduces the rotational moment excitation of the orbiting scroll 2. As a physical parameter affecting the noise vibration of the eccentric rotating body, the reduction of the rotational moment excitation can reduce the unbalanced force of the compressor from the root, thereby optimizing the noise vibration.

[0039] Table 1:

[0040]

[0041] In the above example, since the middle of the base plate 22 is thicker than the edge, the central strength of the orbiting scroll 2 is also enhanced, the strength of the orbiting scroll 2 is ensured, the deformation of the orbiting scroll 2 is reduced, the reliability of the orbiting scroll 2 is improved, and the reliability of the compressor is also enhanced.

[0042] In addition, since the middle of the base plate 22 is thicker than the edge, compared with the conventional design, the center of gravity of the orbiting scroll 2 is also lowered, the overturning moment of the orbiting scroll 2 is reduced, and the operation stability of the orbiting scroll 2 is improved.

[0043] In some embodiments, as shown in Figures 1-3 The aforementioned base plate 22 has a base body 22a, and a first protruding portion 22b protruding from the base body 22a in the middle of the other side of the base plate 22. A first stepped groove 2a is formed between the first protruding portion 22b and the base body 22a of the base plate. The bottom surface 221 of the first stepped groove forms the edge of the aforementioned base plate 22, and the crankshaft sleeve hole 201 is located on the first protruding portion 22b.

[0044] In the above example, by designing the first protruding portion 22b in the middle of the base body 22a of the base plate, the first stepped groove 2a is formed between the first protruding portion 22b and the base body 22a of the base plate, and the crankshaft sleeve hole 201 is located on the first protruding portion 22b. Compared with the conventional design, the present application can thin the edge of the base plate 22 by designing the first stepped groove 2a, so as to facilitate the realization that the thickness H3 of the base plate 22 at the bottom surface of the crankshaft sleeve hole 201 is greater than the thickness H1 of the edge of the base plate 22.

[0045] In some embodiments, the middle part of the first protruding part 22b has a second protruding part 22c, which forms a second stepped groove 2b between the body of the first protruding part 22b and the second protruding part 22c, and the aforementioned crankshaft sleeve hole 201 is located on the second protruding part 22c. The thickness of the base plate 22 at the bottom of the second stepped groove 2b is H2, and H3≥H2>H1.

[0046] In the above example, the first step cooperates with the second step to realize the multi-step design of the base plate 22 of the orbiting scroll 2, which makes the center of the orbiting scroll base plate 22 thicker than the edge. This design can ensure the strength of the orbiting scroll 2 while reducing the mass and inertia tensor of the orbiting scroll 2 to reduce the operating torque excitation, and can reduce the noise and vibration of the orbiting scroll 2 and enhance the reliability of the compressor.

[0047] In some embodiments, H2 / H1<3. If H2 is too large than H1, the orbiting scroll 2 will be too high under the support of the support 4, which will cause the orbiting scroll 2 to have too large axial distance from the center of the crankshaft main bearing below, which will cause the overturning moment of the orbiting scroll 2 to increase, and the stability of the orbiting scroll 2 will decrease.

[0048] In some embodiments, the height of the orbiting scroll tooth 21 protruding from one side of the base plate 22 is H. H>H3, so that the displacement is ensured while the weight of the orbiting scroll 2 is made as light and low as possible.

[0049] In some embodiments, H / H1<5. In the case of a certain H1, by making H / H1<5, the reliability of the operation of the orbiting scroll 2 can be improved. If H is too large, the overturning force will be too large, and the noise and vibration and reliability will be deteriorated.

[0050] In some embodiments, the application further provides a pump body assembly, which can include the orbiting scroll 2 of any one of the above. Due to the adoption of the orbiting scroll 2 described above, the base plate 22 is thick in the middle and thin at the edge. Due to the thin thickness of the base plate 22 at the edge, compared with the conventional design, the mass and inertia tensor of the orbiting scroll 2 can be reduced, so that the rotating torque excitation of the orbiting scroll 2 can be reduced, and the noise and vibration of the whole machine can be reduced.

[0051] In some embodiments, as Figure 4As shown, when the base plate 22 has a base body 22a, a first protruding part 22b protruding from the base body 22a is formed in the middle of the other side of the base plate 22, and a first stepped groove 2a is formed between the first protruding part 22b and the base body 22a; the bottom surface 221 of the first stepped groove forms the edge of the aforementioned base plate 22, and the middle of the first protruding part 22b has a second protruding part 22c, a second stepped groove 2b is formed between the second protruding part 22c and the body of the first protruding part 22b, and the crankshaft sleeve hole 201 is located on the second protruding part 22c; the thickness of the base plate 22 at the bottom surface of the second stepped groove 2b is H2, H3≥H2>H1, and the pump body assembly further comprises a support 4 for providing support to the orbiting scroll 2, wherein the support 4 is configured to provide support to the bottom surface 222 of the second stepped groove and not to the bottom surface 221 of the first stepped groove.

[0052] In the above example, by allowing the support 4 to provide support to the bottom surface 222 of the second stepped groove with a thicker thickness and not to the bottom surface 221 of the first stepped groove with a thinner thickness, since the orbiting scroll 2 has a higher strength at the position with a larger thickness, such a support design enables the orbiting scroll 2 to be centrally supported, and the support stability of the support 4 to the orbiting scroll 2 can be improved.

[0053] In a specific application example, the aforementioned support 4 only provides support to the orbiting scroll 2 by supporting the bottom surface 222 of the second stepped groove, so as to ensure that the support 4 only provides support to the orbiting scroll 2 at the position with a thicker thickness, thereby ensuring the support stability of the support 4 to the orbiting scroll 2.

[0054] In some embodiments, as shown, Figures 3-5 The aforementioned support 4 has a first end 4a, the first end 4a has a first mounting groove 401 for accommodating the base plate 22, the middle of the bottom surface of the first mounting groove 401 is provided with a second mounting groove 403 for inserting the aforementioned second protruding part 22c. The bottom of the second mounting groove 403 is provided with a through hole 404 for the crankshaft 6 to pass through. The bottom surface of the first mounting groove 401 is further provided with a first annular protrusion 41 and a second annular protrusion 42. The first annular protrusion 41 and the second annular protrusion 42 are both arranged around the second mounting groove 403. The first annular protrusion 41 and the second annular protrusion 42 form an annular groove 402 for mounting the slip ring 3 therebetween. The first annular protrusion 41 is located inside the second annular protrusion 42. The support 4 supports the aforementioned bottom surface 222 of the second stepped groove through the end surface 411 of the first annular protrusion. The distance between the end surface 411 of the first annular protrusion and the end surface of the first end 4a is h2, the end surface 421 of the second annular protrusion is opposite to the bottom surface 221 of the first stepped groove, and the distance between the end surface 421 of the second annular protrusion and the end surface of the first end 4a is h1, h2-H2

[0055] In the above example, by making h2-H2<h1-H1, it can be guaranteed that the end surface 411 of the first annular protrusion is in contact with the bottom surface 222 of the second stepped groove after the pump body assembly is assembled, and the end surface 421 of the second annular protrusion is not in contact with the bottom surface 221 of the first stepped groove, so that the support provided by the bracket 4 to the bottom surface 222 of the second stepped groove can be achieved, and the support provided by the bracket 4 to the bottom surface 221 of the first stepped groove is not achieved.

[0056] In some embodiments, as shown in Figure 3 and Figure 5 , the center line of the first annular protrusion 41 coincides with the center line of the bracket 4, and the outer diameter of the first annular protrusion 41 is d2. The center line of the first protruding part 22b coincides with the center line of the orbiting scroll 2, and the outer diameter of the first protruding part 22b is D2; D2≥d2.

[0057] In the above example, by making D2≥d2, the end surface 411 of the first annular protrusion can be covered by the bottom surface 222 of the second stepped groove, which is beneficial to improve the stability of the support provided by the end surface 411 of the first annular protrusion to the bottom surface 222 of the second stepped groove. In addition, the inner side of the first annular protrusion 41 is generally provided with a sealing ring 5, which can be a PTFE sealing ring. The sealing ring 5 provides support to the orbiting scroll 2 through the bottom surface 222 of the second stepped groove, and by making D2≥d2, the bottom surface 222 of the second stepped groove can cover the sealing ring 5, which is beneficial to improve the stability of the support provided by the sealing ring 5 to the bottom surface 222 of the second stepped groove, and can avoid the failure of the sealing ring due to the inability of the bottom surface 222 of the second stepped groove to cover the sealing ring, thereby ensuring the sealing performance of the sealing ring.

[0058] In some embodiments, as shown in Figure 3 and Figure 5 , the maximum outer diameter of the orbiting scroll tooth 21 is D1. In this way, d2 / D1>0.5, which can ensure that the middle part of the orbiting scroll 2 has a larger high-thickness area, so as to improve the strength of the middle part of the orbiting scroll 2, and is beneficial to improve the stability of the support provided to the bottom surface of the second stepped groove 2b, and reduce the risk of overturning of the orbiting scroll 2.

[0059] In some embodiments, the present application also provides a scroll compressor, which can include the orbiting scroll 2 of any one of the above; or include the pump body assembly of any one of the above. Due to the adoption of the orbiting scroll 2 or the pump body assembly, the middle part of the base plate 22 is thick and the edge is thin, and due to the thin thickness of the edge of the base plate 22, compared with the conventional design, the mass and the inertia tensor of the orbiting scroll 2 can be reduced, so as to reduce the rotational moment excitation of the orbiting scroll 2, and reduce the noise and vibration of the whole machine.

[0060] Figure 4 The pump body assembly schematic diagram of the whole structure of the scroll compressor of the present application, the scroll compressor is mainly composed of a moving scroll 2, a static scroll 1, a bracket 4, a crankshaft 6, a cross slip ring 3 and the like. The compressor exhaust directly enters the internal cavity of the compressor, all the cavities in the compressor are under the high pressure of the compressor exhaust pressure, and such a structure in which the cavity is filled with high-pressure gas is called a high-pressure cavity scroll compressor. The high-pressure cavity scroll compressor lifts the moving scroll 2 by introducing high pressure through the bottom surface of the base plate 22 of the moving scroll 2, in other words, the side of the moving scroll 2 away from the static scroll 1 has a back pressure cavity, and the moving scroll 2 is pressed tightly with the static scroll 1 under the action of back pressure to realize the sealing of the pump body. The power source of the moving scroll 2 comes from the motor driving the rotation of the crankshaft 6, the top of the crankshaft 6 is an eccentric shaft section, the eccentric shaft section is sleeved in the crankshaft sleeve hole 201 of the moving scroll 2, and a bearing can be sleeved between the eccentric shaft section and the crankshaft sleeve hole 201 to enable the eccentric shaft section to be fixedly sleeved with the crankshaft sleeve hole 201. The eccentric shaft section drives the moving scroll 2 to rotate by eccentric rotation. The rotating moving scroll 2 generates centrifugal force under the action of the eccentric shaft section, which will cause the overturning of the moving scroll 2 and the intensification of the vibration of the whole compressor. However, the present application can make the mass, inertia tensor and principal moment of inertia of the moving scroll 2 decrease to a certain extent by making H3>H1, so as to reduce the rotational moment excitation of the moving scroll 2. As a physical parameter affecting the noise vibration of the eccentric rotating body, the decrease of the rotational moment excitation can reduce the unbalanced force of the compressor from the root, thereby optimizing the noise vibration.

[0061] Those skilled in the art will readily understand that the advantageous technical features of the above-mentioned modes can be freely combined and superimposed without conflict.

[0062] The above description is only the preferred embodiment of the present application, and is not intended to limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application. The above description is only the preferred embodiment of the present application, and it should be pointed out that, for ordinary skilled in the art, without departing from the technical principles of the present application, a number of improvements and modifications can be made, and these improvements and modifications shall be regarded as the protection scope of the present application.

Claims

1. A pump body assembly, comprising a moving scroll plate (2), characterized in that: The moving scroll disk (2) includes a base plate (22), one side of the base plate (22) is provided with moving scroll disk teeth (21), the middle of the other side of the base plate (22) is provided with a crankshaft sleeve hole (201), the thickness of the base plate (22) at the bottom surface (223) of the crankshaft sleeve hole is H3, and the thickness at the edge of the base plate (22) is H1. The substrate (22) has a base (22a), and a first protrusion (22b) protruding from the base (22a) at the middle of the other side of the substrate (22). A first stepped groove (2a) is formed between the first protrusion (22b) and the base (22a). The bottom surface (221) of the first stepped groove forms the edge of the substrate (22). A second protrusion (22c) is located at the middle of the first protrusion (22b), and a second stepped groove (2b) is formed between the second protrusion (22c) and the body of the first protrusion (22b). The crankshaft sleeve hole (201) is located on the second protrusion (22c). The thickness of the substrate (22) at the bottom surface (222) of the second stepped groove is H2, where H3 > H2 > H1. The pump assembly further includes a bracket (4) for supporting the moving scroll plate (2), wherein the bracket (4) supports the bottom surface (222) of the second stepped groove and does not support the bottom surface (221) of the first stepped groove; the bracket (4) supports the moving scroll plate (2) only by supporting the bottom surface (222) of the second stepped groove; the bracket (4) has a first end (4a), the first end (4a) has a first mounting groove (401) for accommodating the substrate (22), and the bottom surface of the first mounting groove (401) has a second mounting groove (403) for the second protrusion (22c) to be inserted into the middle; the bottom surface of the first mounting groove (401) also has a first annular protrusion (41) and a second annular protrusion (42), the first annular protrusion (41) and the second annular protrusion (42) are provided, ... second annular protrusion (41) and the second annular protrusion (42) are provided, the second annular protrusion (41) and the second annular protrusion (42) are provided, the second annular protrusion (41) and the second annular protrusion (42) are provided, the second annular protrusion (41) and the second annular protrusion (42) are provided, the second annular protrusion (41) and the second annular protru Both annular protrusions (42) are arranged around the second mounting groove (403), wherein an annular groove (402) for mounting the cross slip ring (3) is formed between the first annular protrusion (41) and the second annular protrusion (42), the first annular protrusion (41) is located inside the second annular protrusion (42), and the bracket (4) provides support for the bottom surface (222) of the second stepped groove through the end face (411) of the first annular protrusion; wherein the distance between the end face (411) of the first annular protrusion and the end face of the first end (4a) is h2, the end face (421) of the second annular protrusion is opposite to the bottom surface (221) of the first stepped groove, and the distance between the end face (421) of the second annular protrusion and the end face of the first end (4a) is h1; h2-H2<h1-H1.

2. The pump body assembly according to claim 1, characterized in that: H2 / H1 < 3.

3. The pump body assembly according to any one of claims 1-2, characterized in that: The height H of the protrusion of the moving scroll disk teeth (21) from one side of the substrate (22) is as follows: H > H3; and / or, H / H1 < 5.

4. The pump body assembly according to claim 1, characterized in that: The centerline of the first annular protrusion (41) coincides with the centerline of the bracket (4), and the outer diameter of the first annular protrusion (41) is d2; wherein, The centerline of the first protrusion (22b) coincides with the centerline of the moving scroll disk (2), and the outer diameter of the first protrusion (22b) is D2; D2≥d2; And / or, the maximum outer diameter of the moving vortex disk tooth (21) is D1, d2 / D1>0.

5.

5. A scroll compressor, characterized in that: Includes the pump body assembly according to any one of claims 1-4.

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