Two-section type rack and scroll compressor

Abstract

The two-section type rack comprises a rack plate and a bearing frame which are detachably connected, the bearing frame comprises a first containing part and a second containing part, the first containing part is arranged at the bottom of the bearing frame, a main bearing is arranged in the first containing part, the second containing part is arranged in the bearing frame, and the main bearing is arranged in the first containing part. The main balance block is arranged in the second containing part, the rack plate is arranged on the top of the bearing frame and comprises a third containing part, and the moving scroll plate is arranged in the third containing part. According to the two-section type rack, the weight of the main balance block can be reduced, meanwhile, the deformation amount of the crankshaft in the operation process is reduced, and the problem that in an existing scheme, due to the fact that the displacement of the scroll compressor is increased, vibration is increased, and the deformation amount of the crankshaft is increased is solved. The two-section type rack is simple in overall structure and convenient to produce and assemble, and the problems of main bearing abrasion and compressor energy efficiency improvement caused by excessive deformation of the crankshaft can be solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of scroll compressor, in particular to a two-section rack and scroll compressor. BACKGROUND

[0002] When the scroll compressor is running, in order to reduce the vibration of the compressor during operation, the compressor usually needs to be designed for static balance and dynamic balance. The usual practice is to set the main balance block at the lower part of the main bearing of the compressor rack, and set the rotor balance block at the lower end of the motor, so as to form the balance mechanism of the compressor, and reduce the vibration of the compressor during operation. When the compressor starts to run, the crankshaft starts to rotate with the rotation of the rotor, so that the eccentric part of the crankshaft starts to revolve and translate with a certain radius around the center of the crankshaft. The moving scroll follows the eccentric part of the crankshaft to revolve and translate, and since the moving scroll is eccentric, in order to balance the centrifugal force generated by the revolving and translating of the moving scroll, a main balance block and a rotor balance block with specific weight and shape are usually set at the lower part of the main bearing of the compressor rack and the lower part of the rotor, so that the forces of the moving disc, the main balance block and the rotor balance block on the crankshaft are balanced, and the moment of force is also balanced, so as to reduce the vibration of the compressor during operation.

[0003] Due to the improvement of the use requirements, the displacement of the scroll compressor is also gradually increased. The displacement of the existing scroll compressor is increased from 96cc to 135cc or even higher. With the increase of displacement, the weight of the moving scroll is also increasing. In order to ensure that the vibration of the compressor does not expand, the weight of the main balance block and the rotor balance block must be increased, but this will cause the problem of expansion of the deformation of the crankshaft. However, due to the energy saving demand, in order to ensure the energy efficiency of the compressor, it is also necessary to ensure that the deformation of the crankshaft cannot be expanded.

[0004] Therefore, it is necessary to design a two-section rack to solve the above problems. Invention content

[0005] Therefore, in order to overcome the defects of the prior art, the present application provides a two-section rack and scroll compressor, which effectively solves the problem that the existing structure cannot ensure that the deformation of the crankshaft cannot be expanded while ensuring that the vibration of the compressor does not expand with the increase of the displacement of the scroll compressor.

[0006] According to the first aspect of the utility model discloses a two -stage frame for scroll compressor, scroll compressor includes main bearing, main balance block and movement scroll disc, wherein, two -stage frame includes rack board and bearing frame of detachable connection, bearing frame includes first accommodating portion and second accommodating portion, first accommodating portion sets up at the bottom of bearing frame, main bearing sets up in first accommodating portion, second accommodating portion sets up in the inside of bearing frame, main balance block sets up in second accommodating portion, rack board sets up at the top of bearing frame, rack board includes third accommodating portion, movement scroll disc sets up in third accommodating portion.

[0007] Preferably, the bearing frame further comprises an extension arm and a mounting body, an inside of the mounting body is provided with the first accommodating portion, and the extension arm is arranged on an outer side wall of the mounting body.

[0008] Preferably, the extension arm comprises a first extension part and a second extension part, the first extension part extends outwardly along a direction perpendicular to an axis of the mounting body, and the second extension part extends along the axis of the mounting body towards a direction close to the rack board.

[0009] Preferably, the rack board comprises a connecting end portion, and the connecting end portion faces an end portion of the second extension part.

[0010] Preferably, the two-stage frame further comprises a connecting piece, and the connecting piece penetrates the connecting end portion and the end portion of the second extension part.

[0011] Preferably, the rack board further comprises a step block, the step block is arranged on an inner wall of the third accommodating portion, and the step block extends from the inner wall of the third accommodating portion towards a middle portion of the third accommodating portion.

[0012] Preferably, an upper portion of the step block is provided with a stepped structure, and one end face of the movement scroll disc abuts against the stepped structure.

[0013] According to the second aspect of the utility model, a scroll compressor is provided, wherein the scroll compressor comprises the two-stage frame as described above.

[0014] Preferably, the scroll compressor further comprises a crankshaft, the crankshaft penetrates the first accommodating portion and the second accommodating portion, an eccentric portion of the crankshaft is arranged in the third accommodating portion, the movement scroll disc is sleeved on the eccentric portion, and the main balance block is sleeved on the crankshaft.

[0015] Preferably, an end of the crankshaft away from the eccentric portion is sleeved with a rotor, an end portion of the rotor is sleeved with a rotor balance block, and / or the number of the main balance blocks is multiple, and the multiple main balance blocks are arranged in the second accommodating portion and sleeved on the crankshaft.

[0016] According to the two-section rack of the utility model, through the cooperation of the rack plate and the bearing frame which are detachably connected with each other, the deformation amount of the crankshaft in the operation process can be reduced while reducing the weight of the main balance block, the problem that the deformation amount of the crankshaft is enlarged due to the vibration increase of the scroll compressor caused by the displacement increase in the prior art scheme is solved. The two-section rack has simple overall structure and is convenient for production and assembly, the weight of the main balance block can be reduced through structural design, even after the displacement of the scroll compressor is increased, the same weight of the main balance block can be used to avoid excessive deformation of the crankshaft, thereby avoiding the problem of main bearing wear caused by excessive deformation of the crankshaft, and the problem of compressor energy efficiency improvement can also be solved.

[0017] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the following preferred embodiments are specifically described below, and the accompanying drawings are described in detail as follows. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments, it should be understood that the following drawings only show some embodiments of the present application, therefore should not be regarded as a limitation to the scope, for those skilled in the art, without paying creative labor, other related drawings can also be obtained according to these drawings.

[0019] Figure 1 The structure schematic diagram of the two-section rack according to the embodiment of the utility model is shown;

[0020] Figure 2 Another structure schematic diagram of the two-section rack according to the embodiment of the utility model is shown;

[0021] Figure 3 The partial structure schematic diagram of the scroll compressor according to the embodiment of the utility model is shown.

[0022] Reference signs: 1-rack plate; 101-third accommodating part; 103-step block; 104-step structure; 2-bearing frame; 201-first accommodating part; 202-second accommodating part; 203-first extension part; 204-second extension part; 205-mounting body; 3-connector; 4-main bearing; 5-main balance block; 6-moving scroll disc; 7-crankshaft; 701-eccentric part; 8-rotor; 9-rotor balance block; L1-first axis. DETAILED DESCRIPTION

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the following will be combined with the accompanying drawings in the embodiments of the present application to make a clear and complete description of the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. The components of the embodiments of the present application described and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0024] In the description of the embodiments of the present application, it should be noted that the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like are based on the orientations or positional relationships shown in the drawings, or the orientations or positional relationships in which the products of the present application are usually placed, and are only for the convenience of describing the present application and simplifying the description, and are not intended to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third", and the like are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0025] In addition, the terms "horizontal", "vertical", and the like do not mean that the components must be absolutely horizontal or vertical, but can be slightly inclined. For example, "horizontal" only means that it is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0026] In the description of the embodiments of the present application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "arrangement", "installation", "communication", and "connection" should be understood broadly, for example, can be fixedly connected, or can be detachably connected, or integrally connected; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium, or can be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0027] According to the first aspect of the present application, a two-section rack is provided, as shown in the figure, which is used on a scroll compressor, the scroll compressor comprising a main bearing 4, a main balance block 5, and a moving scroll 6, and the two-section rack comprising a rack plate 1 and a bearing frame 2. Figures 1 to 3

[0028] In the following description, reference will be made to Figures 1 to 3 ​The detailed structure of the frame plate 1 and bearing frame 2 of the two-section frame is described in detail.

[0029] like Figures 1 to 3 As shown, in this embodiment, the frame plate 1 and the bearing bracket 2 are formed as a detachable connection structure to facilitate the installation of the main balance block 5 and the moving scroll plate 6.

[0030] Specifically, the bearing housing 2 may include a first receiving portion 201 and a second receiving portion 202. The first receiving portion 201 is disposed at the bottom of the bearing housing 2, and the main bearing 4 is disposed in the first receiving portion 201. The second receiving portion 202 is disposed inside the bearing housing 2, and the main balancing block 5 is disposed in the second receiving portion 202. Both the first receiving portion 201 and the second receiving portion 202 can be understood as being located inside the bearing housing 2. Compared to the prior art, this can be understood as hollowing out the interior of the bearing housing 2 in the prior art, so that it can be used to accommodate the main balance block 5. Since the second receiving portion 202 is located on top of the first receiving portion 201, the main balance block 5 is also correspondingly located on top of the main bearing 4. In this way, the scroll compressor can select the lighter main balance block 5 under the same displacement. Therefore, even if only the original weight of the main balance block 5 is used, it can ensure that the deformation of the crankshaft 7 will not increase when the displacement of the scroll compressor increases. This can also avoid the problem of wear of the main bearing 4 due to the deformation of the crankshaft 7, better ensure the reliability of the main bearing 4, and improve the energy efficiency of the scroll compressor.

[0031] The frame plate 1 is located on top of the bearing bracket 2. The frame plate 1 includes a third receiving portion 101, in which the moving scroll plate 6 is disposed. The third receiving portion 101 can also be understood as the interior of the frame plate 1. The third receiving portion 101 can communicate with the second receiving portion 202 to facilitate the connection between the moving scroll plate 6 and the crankshaft 7. This arrangement reduces the weight of the main balance block 5 and the deformation of the crankshaft 7 during operation while ensuring that the connection between the moving scroll plate 6 and the crankshaft 7 remains unchanged, thus solving the problem of improving the energy efficiency of the scroll compressor.

[0032] This two-section frame, through the detachable connection of the frame plate 1 and bearing bracket 2, reduces the weight of the main balance block 5 while simultaneously reducing the deformation of the crankshaft 7 during operation. This solves the problem in existing solutions where increased displacement of the scroll compressor leads to increased vibration and consequently, greater deformation of the crankshaft 7. The two-section frame has a simple overall structure, facilitating production and assembly. Its structural design reduces the weight of the main balance block 5, ensuring that even with increased displacement of the scroll compressor, the same weight of main balance block 5 can be used to prevent excessive deformation of the crankshaft 7. This avoids wear on the main bearing 4 caused by excessive crankshaft 7 deformation and also addresses the issue of improving compressor energy efficiency.

[0033] Preferably, such as Figure 2 As shown, in this embodiment, the bearing bracket 2 may further include an extension arm and a mounting body 205. The mounting body 205 has a first receiving portion 201 inside, and the extension arm is disposed on the outer side wall of the mounting body 205. The mounting body 205 can also be used for mounting the main bearing 4 and for inserting the crankshaft 7. The extension arm is used to accommodate the second receiving portion 202 and connect to the frame plate 1.

[0034] Furthermore, the extension arm may include a first extension 203 and a second extension 204. The first extension 203 extends outward in a direction perpendicular to the axis of the mounting body 205. The axis of the mounting body 205 can be understood as... Figure 2 The first axis L1 and the second extension 204 extend along the axis of the mounting body 205 toward the direction close to the frame plate 1. In embodiments, the first extension 203 and the second extension 204 can be a structure perpendicularly connected to each other. Figure 2 In the middle, the first extension 203 can be along Figure 2 Extending in the left and right direction, the second extension 204 can extend along... Figure 2 It extends vertically. It should also be noted that the end of the second extension 204 can be bent and structurally fitted to avoid obstacles in order to connect with the frame plate 1 and to accommodate the connecting member 3 described below.

[0035] Preferably, such as Figures 1 to 3 As shown, in this embodiment, the frame plate 1 may include a connecting end that faces the end of the second extension 204. To ensure the connection and fit between the frame plate 1 and the bearing bracket 2, the connecting end and the end of the second extension 204 need to face each other and fit together.

[0036] Preferably, such as Figures 1 to 3 As shown, in this embodiment, the two-section frame further includes a connector 3, which passes through the connecting end and the end of the second extension 204. The connecting end may have a connecting hole, and the end of the second extension 204 is additionally provided with a position for the connector 3 to pass through, so that the connector 3 can connect the frame plate 1 to the bearing frame 2.

[0037] Preferably, in an embodiment, the connector 3 can be a connecting screw.

[0038] Preferably, in the embodiment, the connector 3 can be a combination of a pin and a screw, for example, using a pin for positioning first and then using a screw for connection.

[0039] Preferably, in the embodiment, the two-section frame is formed as an approximate cylindrical structure, so the number of connectors 3 can be multiple and they are evenly distributed along the circumference.

[0040] Preferably, as Figures 1 to 3 shown, in the embodiment, the rack plate 1 can further include a step block 103, the step block 103 is arranged on the inner wall of the third accommodating portion 101, and the step block 103 is extended from the inner wall of the third accommodating portion 101 towards the middle part of the third accommodating portion 101. The step block 103 can facilitate the connection of the moving scroll 6, and at the same time, the revolution translation of the scroll compressor is located between the third accommodating portion 101 and the second accommodating portion 202.

[0041] Preferably, as Figures 1 to 3 shown, in the embodiment, the upper part of the step block 103 is provided with a stepped structure 104, and one end surface of the moving scroll 6 abuts against the stepped structure 104. The stepped structure 104 can be a one-level structure, but is not limited thereto, and can also be a multi-level structure, which can be specifically selected according to the structure of the moving scroll 6.

[0042] The two-section rack is connected by the rack plate and the bearing frame which are detachably connected with each other, can reduce the weight of the main balance block while reducing the deformation of the crankshaft during operation, solves the problem that in the prior art, the vibration of the scroll compressor increases due to the increase of the displacement, and the deformation of the crankshaft is also enlarged. The two-section rack has a simple overall structure and is easy to produce and assemble, and the weight of the main balance block can be reduced through structural design, so that even if the displacement of the scroll compressor increases, the same weight of the main balance block can be used to avoid excessive deformation of the crankshaft, thereby avoiding the problem of excessive deformation of the crankshaft, and the problem of wear of the main bearing caused by excessive deformation of the crankshaft can also be avoided. It can also solve the problem of improving the energy efficiency of the compressor.

[0043] In addition, as Figure 3 shown, according to the second aspect of the utility model, a scroll compressor is provided, which comprises the two-section rack as described above. In the process of use, through the two-section rack, the scroll compressor can realize that the weight of the main balance block 5 and the rotor balance block 9 does not need to be increased under the condition of increasing displacement, and the deformation of the crankshaft 7 can also be ensured not to be enlarged.

[0044] Preferably, as Figure 3 shown, in the embodiment, the scroll compressor can further include a crankshaft 7, the crankshaft 7 penetrates the first accommodating portion 201 and the second accommodating portion 202, an eccentric part 701 of the crankshaft 7 is arranged in the third accommodating portion 101, the moving scroll 6 is sleeved on the eccentric part 701, and the main balance block 5 is sleeved on the crankshaft 7. In actual use, the main balance block 5 is located in the upper part of the main bearing 4 and the main balance block 5 is located in the interior of the two-section rack. Such a structure can reduce the weight of the main balance block 5 required to avoid excessive deformation of the crankshaft 7 under the condition that the displacement of the scroll compressor is unchanged. Accordingly, the weight of the main balance block 5 does not need to be increased under the condition of increasing displacement.

[0045] Preferably, as shown in the embodiment, a rotor 8 is sleeved on one end of the crankshaft 7 away from the eccentric portion 701, and an end of the rotor 8 is sleeved with a rotor balance weight 9. The rotor balance weight 9 can be a common balance weight, but in the embodiment, if the weight of the main balance weight 5 is unchanged, the weight of the rotor balance weight 9 can also be reduced. Figure 3

[0046] Preferably, in the embodiment, the number of the main balance weight 5 can be multiple, and the multiple main balance weights 5 are all arranged in the second accommodating portion 202 and sleeved on the crankshaft 7. The number of the main balance weight 5 can be increased or decreased according to the needs, which is not limited here, as long as the second accommodating portion 202 has enough space to accommodate.

[0047] The scroll compressor can increase the displacement without increasing the weight of the main balance weight 5 and the rotor balance weight 9 to ensure that the vibration of the compressor does not expand, thereby solving the problem of the expansion of the deformation amount of the crankshaft 7, and solving the problem of the energy efficiency of the scroll compressor.

[0048] Finally, it should be noted that the above-described embodiments are only specific embodiments of the present application, which are used to illustrate the technical solutions of the present application, but not to limit them, and the protection scope of the present application is not limited thereto. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can modify or easily think of changes to the technical solutions recorded in the foregoing embodiments, or make equivalent replacements to some technical features, within the technical scope disclosed by the present application. These modifications, changes or replacements do not make the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.​

Claims

1. A two-stage frame for a scroll compressor, said scroll compressor comprising a main bearing, a main balance block and a moving scroll disc, characterized in that, The two-section rack comprises rack plates and a bearing frame which are detachably connected, the bearing frame comprises a first accommodating part and a second accommodating part, the first accommodating part is arranged at the bottom of the bearing frame, the main bearing is arranged in the first accommodating part, the second accommodating part is arranged in the interior of the bearing frame, the main balance block is arranged in the second accommodating part, the rack plate is arranged at the top of the bearing frame, and the rack plate comprises a third accommodating part, and the moving scroll is arranged in the third accommodating part.

2. The two-stage gantry of claim 1, wherein, The bearing frame further comprises an extension arm and a mounting body, the first accommodating part is arranged in the interior of the mounting body, and the extension arm is arranged on the outer side wall of the mounting body.

3. The two-stage gantry of claim 2, wherein, The extension arm comprises a first extension part and a second extension part, the first extension part extends outwardly along the direction perpendicular to the axis of the mounting body, and the second extension part extends along the axis of the mounting body towards the direction close to the rack plate.

4. The two-stage gantry of claim 3, wherein, The rack plate comprises a connecting end part, and the connecting end part faces the end part of the second extension part.

5. The two-stage gantry of claim 4, wherein, The two-section rack further comprises a connecting piece, and the connecting piece penetrates the connecting end part and the end part of the second extension part.

6. The two-stage gantry of claim 1, wherein, The rack plate further comprises a step block, the step block is arranged on the inner wall of the third accommodating part, and the step block extends from the inner wall of the third accommodating part towards the middle part of the third accommodating part.

7. The two-stage gantry of claim 6, wherein, The upper part of the step block is provided with a stepped structure, and one end surface of the moving scroll abuts against the stepped structure.

8. A scroll compressor characterized by, The scroll compressor comprises the two-section rack according to any one of claims 1 to 7.

9. The scroll compressor of claim 8, wherein, The scroll compressor further comprises a crankshaft, the crankshaft penetrates the first accommodating part and the second accommodating part, the eccentric part of the crankshaft is arranged in the third accommodating part, the moving scroll is sleeved on the eccentric part, and the main balance block is sleeved on the crankshaft.

10. The scroll compressor of claim 9, wherein, The end of the crankshaft away from the eccentric part is sleeved with a rotor, the end of the rotor is sleeved with a rotor balance block; and / or, The number of the main balance blocks is multiple, and the multiple main balance blocks are arranged in the second accommodating part and sleeved on the crankshaft.

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