Movable scroll plate, pump body assembly and scroll compressor

Abstract

The invention provides a movable scroll plate, a pump body assembly and a scroll compressor, the movable scroll plate comprises a base plate, one side of the base plate is provided with movable scroll plate teeth, the middle part of the other side of the base plate is provided with a crankshaft sleeving hole, and the thickness H3 of the base plate at the bottom surface of the crankshaft sleeving hole is greater than the thickness H1 of the edge of the base plate. In this way, the middle of the base plate is thick, the edge of the base plate is thin, and due to the fact that the thickness of the edge of the base plate is small, compared with a conventional design, the design can reduce the mass and inertia tensor of the movable scroll plate, and therefore rotating torque excitation of the movable scroll plate can be reduced, and noise and vibration of the whole machine can be reduced. In addition, the middle of the base plate is thicker than the edge of the base plate, so that the central strength of the movable scroll plate can be enhanced, the strength of the movable scroll plate is ensured, the deformation of the movable scroll plate is reduced, the reliability of the movable scroll plate is improved, and the reliability of the compressor is further enhanced.

Description

Technical Field

[0001] The present invention belongs to the technical field of compressors, and particularly relates to a moving scroll plate, a pump body assembly, and a scroll compressor. Background Art

[0002] A scroll compressor is a volumetric compressor. The compression components are composed of a moving scroll plate and a stationary scroll plate. During the compression process, the relative revolution movement of the moving and stationary scroll plates forms a continuous change in the enclosed volume to achieve the purpose of compressing gas. The motor drives the crankshaft to drive the rotation of the moving scroll plate. Among them, the rotating moving scroll plate is located at the uppermost end of the crankshaft and has a cantilever beam structure, which is prone to generating a large rotational torque excitation, increasing the noise and vibration of the whole machine. Summary of the Invention

[0003] Therefore, the present invention provides a moving scroll plate, a pump body assembly, and a scroll compressor. The main technical problem to be solved is: how to reduce the rotational torque excitation of the moving scroll plate and reduce the noise and vibration of the whole machine.

[0004] To solve the above problems, the present invention provides a moving scroll plate, which includes a substrate. One side of the substrate is provided with moving scroll teeth, and the middle of the other side of the substrate is provided with a crankshaft sleeving hole. The thickness H3 of the substrate at the bottom surface of the crankshaft sleeving hole is greater than the thickness H1 at the edge of the substrate.

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

[0006] In some embodiments, the middle of the first protruding portion has a second protruding portion. A second step groove is formed between the second protruding portion and the body of the first protruding portion. The crankshaft sleeving hole is located on the second protruding portion; wherein, the thickness of the substrate at the bottom surface of the second step groove is H2, and H3≥H2>H1.

[0007] In some embodiments, H2 / H1<3.

[0008] In some embodiments, the height of the moving scroll teeth protruding from one side of the substrate is H; wherein, H>H3; and / or H / H1<5.

[0009] The present invention also provides a pump body assembly, which includes the moving scroll plate according to any one of the above.

[0010] In some embodiments, when the substrate has a base body, a first protruding portion protruding from the base body is provided in the middle of the other side of the substrate. A first stepped groove is formed between the first protruding portion and the base body; the bottom surface of the first stepped groove forms the edge of the substrate, and a second protruding portion is provided in the middle of the first protruding portion. A second stepped groove is formed between the second protruding portion and the main body of the first protruding portion, and the crankshaft sleeve hole is located on the second protruding portion; when the thickness of the substrate at the bottom surface of the second stepped groove is H2 and H3≥H2>H1, the pump body assembly further includes a bracket for supporting the moving scroll plate, wherein the bracket is used to support the bottom surface of the second stepped groove and does not support the bottom surface of the first stepped groove.

[0011] In some embodiments, the bracket provides support for the moving scroll plate only by supporting the bottom surface of the second stepped groove.

[0012] In some embodiments, the bracket has a first end, and the first end has a first mounting groove for accommodating the substrate. A second mounting groove for inserting the second protruding portion is provided in the middle of the bottom surface of the first mounting groove; a first annular protrusion and a second annular protrusion are further provided on the bottom surface of the first mounting groove, and both the first annular protrusion and the second annular protrusion are arranged around the second mounting groove. Wherein, an annular groove for installing 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 bracket provides support for the bottom surface of the second stepped groove through the end surface of the first annular protrusion; 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 faces the bottom surface of the first stepped groove, and the distance between the end surface of the second annular protrusion and the end surface of the first end is h1, and h2-H2<h1-H1.

[0013] In some embodiments, the center line of the first annular protrusion coincides with the center line of the bracket, and the outer diameter of the first annular protrusion is d2; wherein, The center line of the first protruding portion coincides with the center line of the moving scroll plate, and the outer diameter of the first protruding portion is D2; D2≥d2; And / or, the maximum outer diameter of the teeth of the moving scroll plate is D1, and d2 / D1>0.5.

[0014] The present invention also provides a scroll compressor, which includes the moving scroll plate described in any one of the above; or includes the pump body assembly described in any one of the above.

[0015] The moving scroll plate, pump body assembly and scroll compressor provided by the present invention have the following beneficial effects: 1. In the present invention, the thickness H3 of the substrate at the bottom surface of the crankshaft sleeve hole is greater than the thickness H1 at the edge of the substrate, so that the substrate is thick in the middle and thin at the edge. Since the thickness at the edge of the substrate is relatively thin, compared with the conventional design, such a design can reduce the mass and inertia tensor of the moving scroll disk, thereby reducing the rotational torque excitation of the moving scroll disk and reducing the noise and vibration of the whole machine.

[0016] 2. Since the middle of the substrate is thicker than the edge, this can also enhance the central strength of the moving scroll disk, ensure the strength of the moving scroll disk, reduce the deformation of the moving scroll disk, improve the reliability of the moving scroll disk, and further enhance the reliability of the compressor.

[0017] 3. Since the middle of the substrate is thicker than the edge, compared with the conventional design, this can also lower the center of gravity of the moving scroll disk, reduce the tipping moment of the moving scroll disk, and improve the running stability of the moving scroll disk. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. The drawings in the following description are only exemplary. For those of ordinary skill in the art, without creative efforts, other implementation drawings can be obtained by extending according to the provided drawings.

[0019] Figure 1 is a schematic structural diagram of a moving scroll disk with H3 = H2 provided by an embodiment of the present invention; Figure 2 is a schematic structural diagram of a moving scroll disk with H3 > H2 provided by an embodiment of the present invention; Figure 3 is Figure 2 the dimension diagram of the moving scroll disk in Figure 4 is a schematic partial structural diagram of a scroll compressor provided by an embodiment of the present invention; Figure 5 is a schematic structural diagram of a bracket provided by an embodiment of the present invention.

[0020] Reference numerals are: 1. Stationary scroll plate; 2. Rotating scroll plate; 3. Cross slip ring; 4. Bracket; 5. Sealing ring; 6. Crankshaft; 2a. First stepped groove; 2b. Second stepped groove; 4a. First end; 21. Rotating scroll plate teeth; 22. Substrate; 22a. Matrix; 22b. First protrusion; 22c. Second protrusion; 41. First annular protrusion; 42. Second annular protrusion; 201. Crankshaft sleeve hole; 221. Bottom surface of the first stepped groove; 222. Bottom surface of the second stepped groove; 223. Bottom surface of the crankshaft sleeve hole; 401. First mounting groove; 402. Annular groove; 403. Second mounting groove; 404. Through hole; 411. End face of the first annular protrusion; 421. End face of the second annular protrusion. Detailed implementation manners

[0021] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The description of at least one exemplary embodiment is actually only illustrative and in no way restrictive of the present invention and its application or use. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0022] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by orientation words such as "front, rear, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the orientation or positional relationships shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description. Without contrary description, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and thus should not be construed as limiting the protection scope of the present invention; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0023] For ease of description, spatial relative terms such as "above", "over", "on the upper surface", "upper" etc. can be used here to describe the spatial positional relationship of a device or feature shown in the figure with other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figure. For example, if the device in the attached drawing is inverted, the device described as "above" or "over" other devices or structures will then be positioned "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both the orientations of "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding interpretations are made for the spatial relative descriptions used here.

[0024] In addition, it should be noted that the use of terms such as "first", "second" etc. to define components is merely for the convenience of differentiating the corresponding components. Without additional declaration, the above terms have no special meaning, and thus should not be construed as limiting the protection scope of the present invention.

[0025] Referring jointly to Figures 1-3 As shown, according to an embodiment of the present invention, a moving scroll disk 2 is provided, which includes a substrate 22. A moving scroll disk tooth 21 is provided on one side of the substrate 22, and a crankshaft sleeve hole 201 is provided in the middle of the other side of the substrate 22. The substrate 22 can be sleeved and fixed 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 disk 2 to move through the eccentric shaft section. Among them, 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 disk 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.

[0026] Among them, the thickness H3 of the aforementioned substrate 22 at the bottom surface 223 of the crankshaft sleeve hole is greater than the thickness H1 at the edge of the substrate 22. In this way, the substrate 22 is thick in the middle and thin at the edge. Due to the relatively thin thickness at the edge of the substrate 22, compared with the conventional design, such a design can reduce the mass and inertia tensor of the moving scroll disk 2, thereby reducing the rotational torque excitation of the moving scroll disk 2 and reducing the noise and vibration of the whole machine.

[0027] Table 1 below provides a data comparison between the solution of the present invention and a conventional solution in terms of the mass of the moving scroll 2, the inertia tensor of the coordinate system, the inertia tensor of the center of gravity, and the principal moment of inertia. Among them, in the technical solution provided by the present invention, H3 > H1. In the conventional solution, H3 = H1. As can be seen from Table 1 below, by making H3 > H1 in the present invention, the mass of the moving scroll 2, the inertia tensor (including the inertia tensor of the coordinate system and the inertia tensor of the center of gravity), and the principal moment of inertia can all be reduced to a certain extent, so that the driving torque excitation of the moving scroll 2 can be reduced. The driving torque excitation is a physical parameter affecting the noise and vibration of the eccentric rotating body. The reduction of the driving torque excitation can fundamentally reduce the unbalanced force of the compressor, thereby optimizing the noise and vibration.

[0028] Table 1: In the above example, since the middle of the substrate 22 is thicker than the edge, the central strength of the moving scroll 2 can also be enhanced, the strength of the moving scroll 2 can be ensured, the deformation of the moving scroll 2 can be reduced, the reliability of the moving scroll 2 can be improved, and thus the reliability of the compressor can be enhanced.

[0029] In addition, since the middle of the substrate 22 is thicker than the edge, compared with the conventional design, the center of gravity of the moving scroll 2 can also be lowered, the tipping moment of the moving scroll 2 can be reduced, and the running stability of the moving scroll 2 can be improved.

[0030] In some embodiments, as Figures 1-3 shown, the aforementioned substrate 22 has a base body 22a, and a first protruding portion 22b protruding from the base body 22a is provided in the middle of the other side of the substrate 22. A first stepped groove 2a is formed between the first protruding portion 22b and the base body 22a of the substrate. Among them, the bottom surface 221 of the first stepped groove forms the edge of the aforementioned substrate 22, and the crankshaft sleeve hole 201 is located on the first protruding portion 22b.

[0031] In the above example, by designing the first protruding portion 22b in the middle of the base body 22a of the substrate, a first stepped groove 2a is formed between the first protruding portion 22b and the base body 22a of the substrate, and the crankshaft sleeve hole 201 is located on the first protruding portion 22b. Compared with the conventional design, the present invention can make the edge of the substrate 22 thinner by designing the first stepped groove 2a, so as to facilitate making the thickness H3 of the substrate 22 at the bottom surface of the crankshaft sleeve hole 201 greater than the thickness H1 at the edge of the substrate 22.

[0032] In some embodiments, the middle of the foregoing first protruding portion 22b has a second protruding portion 22c, and a second stepped groove 2b is formed between the second protruding portion 22c and the body of the first protruding portion 22b. The foregoing crankshaft sleeve hole 201 is located on the second protruding portion 22c. Wherein, the thickness of the substrate 22 at the bottom surface of the second stepped groove 2b is H2, and H3≥H2>H1.

[0033] In the above example, the first step and the second step cooperate to enable the substrate 22 of the moving scroll disk 2 of the present invention to achieve a multi-step design. This design makes the center of the substrate 22 of the moving scroll disk thicker than the edge. While reducing the mass of the moving scroll disk 2 and reducing the operating torque excitation of the inertia tensor, it can ensure the strength of the moving scroll disk 2. This structure can reduce the noise and vibration of the moving scroll disk 2 and enhance the reliability of the compressor.

[0034] In some embodiments, H2 / H1<3. Wherein, H2 cannot be much larger than H1, otherwise the moving scroll disk 2 will be pushed too high under the support of the bracket 4, resulting in too large an axial distance between the moving scroll disk 2 and the center of the lower crankshaft main bearing, which will cause an increase in the overturning moment of the moving scroll disk 2 and a decrease in the stability of the moving scroll disk 2.

[0035] In some embodiments, the height of the foregoing moving scroll disk teeth 21 protruding from one side of the substrate 22 is H. Wherein, H>H3, so that while ensuring the displacement, the weight of the moving scroll disk 2 can be made the lightest and shortest.

[0036] In some embodiments, H / H1<5. Wherein, when H1 is fixed, by making H / H1<5, the operating reliability of the moving scroll disk 2 can be improved. If H is too large, the overturning force will be too large, and both the noise, vibration and reliability will deteriorate.

[0037] In some embodiments, the present invention further provides a pump body assembly, which may include the moving scroll disk 2 of any one of the above. Wherein, due to the adoption of the foregoing moving scroll disk 2 in the pump body assembly, the substrate 22 can be made thick in the middle and thin at the edge. Since the thickness of the substrate 22 at the edge is relatively thin, compared with the conventional design, such a design can reduce the mass and inertia tensor of the moving scroll disk 2, thereby reducing the rotational torque excitation of the moving scroll disk 2 and reducing the noise and vibration of the whole machine.

[0038] In some embodiments, such as Figure 4As shown, when the substrate 22 has a base body 22a, a first protruding portion 22b protruding from the base body 22a is provided in the middle of the other side of the substrate 22, and a first stepped groove 2a is formed between the first protruding portion 22b and the base body 22a; the bottom surface 221 of the first stepped groove forms the edge of the aforementioned substrate 22, and a second protruding portion 22c is provided in the middle of the first protruding portion 22b, and a second stepped groove 2b is formed between the second protruding portion 22c and the main body of the first protruding portion 22b. The crankshaft sleeve hole 201 is located on the second protruding portion 22c; when the thickness of the substrate 22 at the bottom surface of the second stepped groove 2b is H2 and H3≥H2>H1, the pump body assembly further includes a bracket 4 for supporting the moving scroll disk 2. Among them, the bracket 4 is used to support the bottom surface 222 of the second stepped groove and does not support the bottom surface 221 of the first stepped groove.

[0039] In the above example, by allowing the bracket 4 to support the bottom surface 222 of the second stepped groove with a relatively thick thickness and not supporting the bottom surface 221 of the first stepped groove with a relatively thin thickness, since the moving scroll disk 2 has higher strength at a position with a greater thickness, such a support design enables the moving scroll disk 2 to achieve central support and can improve the support stability of the bracket 4 for the moving scroll disk 2.

[0040] In a specific application example, the aforementioned bracket 4 supports the moving scroll disk 2 only by supporting the bottom surface 222 of the second stepped groove. In this way, it can be ensured that the bracket 4 supports the moving scroll disk 2 only through the relatively thick portion, thereby ensuring the support stability of the bracket 4 for the moving scroll disk 2.

[0041] In some embodiments, as Figures 3-5 shown, the aforementioned bracket 4 has a first end 4a, and the first end 4a has a first installation groove 401 for accommodating the substrate 22. A second installation groove 403 for inserting the aforementioned second protruding portion 22c is provided in the middle of the bottom surface of the first installation groove 401. A through hole 404 for the crankshaft 6 to pass through is provided at the bottom of the second installation groove 403. A first annular protrusion 41 and a second annular protrusion 42 are further provided on the bottom surface of the first installation groove 401. Both the first annular protrusion 41 and the second annular protrusion 42 are arranged around the second installation groove 403. An annular groove 402 for installing 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. The bracket 4 supports the bottom surface 222 of the aforementioned second stepped groove through the end surface 411 of the first annular protrusion. Among them, 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 faces 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, and h2 - H2<h1 - H1.

[0042] In the above example, by making h2 - H2 < h1 - H1, it can be ensured that after the pump body assembly is completed, the end face 411 of the first annular protrusion contacts the bottom surface 222 of the second stepped groove, and the end face 421 of the second annular protrusion does not contact the bottom surface 221 of the first stepped groove. In this way, the purpose of enabling the bracket 4 to support the bottom surface 222 of the second stepped groove and not to support the bottom surface 221 of the first stepped groove can be achieved.

[0043] In some embodiments, as Figure 3 and Figure 5 shown, the center line of the aforementioned 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. Among them, the center line of the first protrusion 22b coincides with the center line of the moving scroll 2, and the outer diameter of the first protrusion 22b is D2; D2 ≥ d2.

[0044] In the above example, by making D2 ≥ d2, the bottom surface 222 of the second stepped groove can cover the end face 411 of the first annular protrusion, which is beneficial to improving the stability of the support of the end face 411 of the first annular protrusion on the bottom surface 222 of the second stepped groove. In addition, a sealing ring 5 is generally installed inside the first annular protrusion 41, and the sealing ring 5 can be a PTFE sealing ring. The sealing ring 5 supports the moving 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 improving the stability of the support of the sealing ring 5 on the bottom surface 222 of the second stepped groove, and can prevent the sealing ring from failing due to the bottom surface 222 of the second stepped groove being unable to cover the sealing ring, thereby ensuring the sealing performance of the sealing ring.

[0045] In some embodiments, as Figure 3 and Figure 5 shown, the maximum outer diameter of the aforementioned moving scroll teeth 21 is D1. Among them, d2 / D1 > 0.5. Such a design can ensure that the middle part of the moving scroll 2 has a relatively large high-thickness area, which can improve the strength of the middle part of the moving scroll 2, is beneficial to improving the stability of the support for the bottom surface of the second stepped groove 2b, and reduces the risk of the moving scroll 2 tipping over.

[0046] In some embodiments, the present invention also provides a scroll compressor, which may include the moving scroll 2 of any one of the above; or include the pump body assembly of any one of the above. Among them, due to the use of the above-mentioned moving scroll 2 or the above-mentioned pump body assembly in the scroll compressor, the middle of the substrate 22 can be made thick and the edge can be made thin. Since the thickness of the edge of the substrate 22 is relatively thin, compared with the conventional design, such a design can reduce the mass and inertia tensor of the moving scroll 2, thereby reducing the rotational torque excitation of the moving scroll 2 and reducing the noise and vibration of the whole machine.

[0047] Figure 4 This is a schematic diagram of the pump body assembly of the overall structure of the scroll compressor of the present invention. The scroll compressor mainly consists of a moving scroll 2, a stationary scroll 1, a bracket 4, a crankshaft 6, a cross slide ring 3, etc. The exhaust gas of the compressor directly enters the internal cavity of the compressor. All the internal cavities of the compressor are under the high pressure of the compressor exhaust pressure. This structure with a cavity filled with high-pressure gas is called a high-pressure cavity scroll compressor. The high-pressure cavity scroll compressor raises 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, there is a back pressure cavity on the side of the moving scroll 2 facing away from the stationary scroll 1. The moving scroll 2 is tightly pressed against the teeth of the stationary scroll 1 under the action of the back pressure to achieve the sealing of the pump body. The power source of the moving scroll 2 comes from the rotation of the crankshaft 6 driven by the motor. The top of the crankshaft 6 is an eccentric shaft section, and the eccentric shaft section is fixedly sleeved in the crankshaft sleeve hole 201 of the moving scroll 2. A bearing can be sleeved between the eccentric shaft section and the crankshaft sleeve hole 201 so that the eccentric shaft section is fixedly sleeved with the crankshaft sleeve hole 201 through the bearing. The eccentric shaft section drives the moving scroll 2 to rotate through eccentric rotation. The rotating moving scroll 2 generates a centrifugal force under the action of the eccentric shaft section, and the centrifugal force will cause the overturning of the moving scroll 2 and the intensification of the vibration of the entire compressor. And in the present invention, by making H3 > H1, the mass, inertia tensor, and principal moment of inertia of the moving scroll 2 can all be reduced to a certain extent, so that the torque excitation of the moving scroll 2 can be reduced. The torque excitation, as a physical parameter affecting the noise and vibration of the eccentric rotating body, the reduction of the torque excitation can fundamentally reduce the unbalanced force of the compressor, thereby optimizing the noise and vibration.

[0048] Those skilled in the art can easily understand that, on the premise of no conflict, the advantageous technical features of the above various methods can be freely combined and superimposed.

[0049] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. The above is only the preferred implementation manner of the present invention. It should be noted that for those of ordinary skill in the art in this technical field, several improvements and variations can be made without departing from the technical principle of the present invention, and these improvements and variations should also be regarded as within the protection scope of the present invention.

Claims

1. A movable scroll (2), characterized in that: It comprises a base plate (22), one side of the base plate (22) is provided with a movable scroll tooth (21), the middle part 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 of the base plate (22) at the edge is H1; The substrate (22) has a base (22a); the middle part of the other side of the substrate (22) has a first protruding portion (22b) protruding from the base (22a); a first step groove (2a) is formed between the first protruding portion (22b) and the base (22a); wherein the bottom surface (221) of the first step groove forms the edge of the substrate (22); the middle part of the first protruding portion (22b) has a second protruding portion (22c); a second step groove (2b) is formed between the second protruding portion (22c) and the body of the first protruding portion (22b); the crankshaft sleeve hole (201) is located on the second protruding portion (22c); Wherein, the thickness of the substrate (22) at the bottom surface (222) of the second step groove is H2, and H3>H2>H1.

2. The movable scroll (2) according to claim 1, characterized in that: H2 / H1<3.

3. The movable scroll (2) according to any one of claims 1 to 2, characterized in that: The height of the movable scroll teeth (21) protruding from one side of the base plate (22) is H; wherein: H>H3; and / or, H / H1<5.

4. A pump assembly, characterized in that: It comprises the movable scroll (2) according to any one of claims 1 to 3.

5. The pump assembly according to claim 4, characterized in that: The pump body assembly further comprises a bracket (4) for providing support for the movable scroll (2), wherein the bracket (4) is used to provide support for the bottom surface (222) of the second step groove, and does not provide support for the bottom surface (221) of the first step groove.

6. The pump assembly according to claim 5, characterized in that: The bracket (4) provides support to the movable scroll (2) only by supporting the bottom surface (222) of the second step groove.

7. The pump assembly according to claim 5 or 6, characterized in that: The bracket (4) has a first end (4a), the first end (4a) has a first mounting groove (401) for accommodating the substrate (22), and a second mounting groove (403) for inserting the second protrusion (22c) is provided in the middle of the bottom surface of the first mounting groove (401); a first annular protrusion (41) and a second annular protrusion (42) are also provided on the bottom surface of the first mounting groove (401), and both the first annular protrusion (41) and the second annular protrusion (42) are arranged around the second mounting groove (403), wherein an annular groove (402) for mounting a cross ring (3) is formed between the first annular protrusion (41) and the second annular protrusion (42), and the first annular protrusion (41) is located on the inner side of the second annular protrusion (42), and the bracket (4) provides support for the bottom surface (222) of the second step groove through the end surface (411) of the first annular protrusion; 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 face (221) of the first step 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.

8. The pump assembly according to claim 7, characterized in that: 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; wherein, The center line of the first protrusion (22b) coincides with the center line of the movable scroll (2), and the outer diameter of the first protrusion (22b) is D2; D2 ≥ d2; And / or, the maximum outer diameter of the movable scroll teeth (21) is D1, and d2 / D1>0.

5.

9. A scroll compressor, characterized in that: It comprises the movable scroll (2) according to any one of claims 1 to 3; or it comprises the pump body assembly according to any one of claims 4 to 8.

Images