Scroll compressor with trapezoidal section of scroll plate

Abstract

The utility model discloses a scroll compressor with a trapezoidal scroll plate section, and relates to the technical field of compressors. The compressor comprises a motor shell and a driving motor arranged in the motor shell, and the driving end of the driving motor is connected with a movable disc; the side, away from the driving motor, of the motor shell is connected with a rear shell, and a static disc meshed with the movable disc is fixedly installed on the inner side of the rear shell. Compared with a rectangular scroll table in the prior art, the scroll table with the trapezoidal section and the scroll table with the rectangular section share the same base circle and the same rotation diameter under the same displacement and the same overall dimension of the movable disc and the static disc, and the length of a median line of the trapezoidal section is equal to the width of the rectangle. Under the same pressure, the pressure resistance of the trapezoidal cross section is obviously superior to that of the rectangular cross section; and meanwhile, under the condition of the same refrigeration output, the sizes of the dynamic and static discs of the compressor can be smaller, so that the light weight of the compressor is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of compressors, in particular to a scroll compressor with a scroll plate having a trapezoidal cross section. Background Art

[0002] The air conditioning refrigerant compressor is the core component of the air conditioning refrigeration system. It is mainly responsible for compressing the refrigerant from a low-pressure state to a high-pressure state, promoting the circulation of the refrigerant in the system, thereby achieving a cooling effect.

[0003] In the prior art, the compressor working part adopts a scroll structure, with a pair of scroll bodies formed by involutes, and the assembly direction of the scroll bodies is 180 degrees relative to each other. One of them is fixed on the shell and remains stationary, called the fixed scroll plate, and the other is driven by the transmission mechanism to make an orbital motion with a fixed rotation radius under the constraint of the anti-rotation mechanism, called the movable scroll plate. The vortex wall meshes with the two end surfaces to form a crescent-shaped sealed cavity. As the movable scroll plate operates, the crescent cavity moves from the outside to the inside, the volume will gradually decrease, the gas is compressed, and after the pressure increases, it is discharged through the hole in the center of the static disk to realize the compression process.

[0004] The cross-sections of conventional fixed scroll and orbiting scroll are usually set to be rectangular. When subjected to pressure, the pressure side of the orbiting scroll acts perpendicularly on the force side of the fixed scroll. Its pressure resistance is limited, and long-term use may easily cause damage to the scroll. Utility Model Content

[0005] The purpose of the utility model is to provide a scroll compressor with a scroll plate having a trapezoidal cross section, so as to solve the following technical problems:

[0006] How to improve the pressure resistance of compressor

[0007] The purpose of the utility model can be achieved through the following technical solutions:

[0008] A scroll compressor with a trapezoidal scroll disc cross-section is used in automobile air-conditioning systems. It can compress low-pressure refrigerant into high pressure and is a core component for realizing air-conditioning refrigeration cycle. The compressor includes a motor housing and a drive motor arranged in the motor housing, and the drive end of the drive motor is connected to a moving disc. The motor housing is connected to a rear housing on the side away from the drive motor, and a stationary disc meshing with the moving disc is fixedly installed on the inner side of the rear housing. The cross-sections of the moving disc and the stationary disc are both trapezoidal.

[0009] As a further solution of the utility model: the vortex body assembly directions of the moving plate and the static plate are 180 degrees relative to each other.

[0010] As a further solution of the utility model: the driving motor includes a motor driving component and a motor spindle, and the motor spindle is connected to the output end of the motor driving component.

[0011] As a further solution of the utility model: a bearing seat is installed inside the motor drive component, and the motor main shaft is passed through the inner ring of the bearing seat.

[0012] As a further solution of the utility model: an eccentric mechanism is installed on the main shaft of the motor, and the eccentric mechanism is connected to the moving plate through a bearing.

[0013] As a further solution of the utility model: the motor housing and the rear housing are detachably connected via a bolt assembly.

[0014] Beneficial effects of the utility model:

[0015] The utility model sets the cross-section of the vortex table of the moving disk and the stationary disk in the compressor to be trapezoidal. Compared with the prior art that sets the cross-section of the vortex table of the moving disk and the stationary disk to be rectangular, under the same displacement and the same outline size of the moving and stationary disks, the trapezoidal cross-section vortex table of the utility model and the rectangular cross-section vortex table in the prior art use the same base circle and the same rotation diameter, the median length of the trapezoidal cross-section is equal to the width of the rectangle, and under the same pressure, the pressure resistance of the trapezoidal cross-section is significantly better than that of the rectangular cross-section; it also means that under the same refrigeration output, the size of the moving and stationary disks of the compressor can be made smaller, thereby achieving lightweighting of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further described below in conjunction with the accompanying drawings.

[0017] Figure 1 It is a structural schematic diagram of a scroll compressor in which the scroll plate cross section is trapezoidal in one embodiment of the utility model;

[0018] Figure 2 It is a schematic diagram of the working principle of a scroll compressor in which the scroll plate cross section is trapezoidal in one embodiment of the utility model;

[0019] Figure 3 It is a schematic diagram of the meshing cross section of a moving plate and a stationary plate in a scroll compressor in the prior art;

[0020] Figure 4 It is a schematic diagram of the meshing cross section of a moving disk and a stationary disk in a scroll compressor in which the scroll disk cross section is trapezoidal in one embodiment of the utility model;

[0021] Figure 5 It is a schematic diagram of the force structure of the scroll plate cross section in the scroll compressor in the prior art;

[0022] Figure 6 It is a schematic diagram of the force structure of the scroll section in a scroll compressor in which the scroll section is trapezoidal in one embodiment of the utility model;

[0023] Figure 7 It is a structural schematic diagram of a moving disk in a scroll compressor in which the scroll disk cross section is trapezoidal in one embodiment of the utility model;

[0024] Figure 8 It is a structural schematic diagram of a stator disk in a scroll compressor in which the scroll disk has a trapezoidal cross section in one embodiment of the utility model.

[0025] In the figure: 1. Motor drive component; 2. Motor housing; 3. Motor main shaft; 4. Bearing seat; 5. Eccentric mechanism; 6. Moving plate; 7. Static plate; 8. Rear housing. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] See also Figure 1 As shown, the utility model is a scroll compressor with a trapezoidal scroll disc cross-section, comprising a motor housing 2, a rear housing 8 connected to the left side of the motor housing 2, the motor housing 2 and the rear housing 8 enclose a working chamber with closed ends on the left and right sides; a drive motor is installed at the left end inside the motor housing 2, the drive motor is mainly composed of a motor drive component 1, a motor main shaft 3, a bearing seat 4 and an eccentric mechanism 5, wherein the motor drive component 1 is fixedly installed at the left end inside the motor housing 2, and the left end of the motor main shaft 3 is fixedly connected to the output end of the motor drive component 1; the bearing seat 4 is installed inside the motor drive component 1, and the motor main shaft 3 is penetrated through the inner ring of the motor drive component 1, and the eccentric mechanism 5 is installed on the motor main shaft 3 to make the movement of the moving disc 6 more balanced and stable.

[0028] See also Figure 2, a moving disc 6 is connected to the right end of the eccentric mechanism 5 through a bearing, and a static disc 7 is fixedly connected to the left end of the rear housing 8. The moving disc 6 and the static disc 7 are a pair of vortex structures, which are a pair of vortex bodies formed by involutes, wherein the moving disc 6 is fixedly connected to the motor main shaft 3 and can rotate with the rotation of the motor main shaft 3, and the static disc 7 is fixedly installed on the rear housing 8 and is always in a stationary state. The vortex body assembly directions of the moving disc 6 and the static disc 7 are 180° relative to each other, and the cross-sections of the moving disc 6 and the static disc 7 are meshed with each other; when the motor housing 2 is started, the motor main shaft 3 can be driven to rotate, and the motor main shaft 3 drives the moving disc 6 to operate through the eccentric mechanism 5, so that relative movement is generated between the moving disc 6 and the static disc 7. In this process, the vortex walls are meshed with each other and form a crescent-shaped sealing cavity with the two end surfaces. As the moving disc 6 operates, the crescent cavity moves from the outside to the inside, and the volume will gradually decrease, the gas is compressed, and after the pressure increases, it is discharged through the hole in the center of the static disc 7 to realize the compression process.

[0029] The vortex body profile adopts a circular involute, with a base circle of a fixed radius. Different generation angles form the two sides of the vortex platform. The angle difference of the generation angle forms the corresponding vortex body thickness; please refer to Figure 3 In the conventional scroll compressor of the prior art, the scroll table of the moving and stationary disks is designed to have a rectangular cross section. The scroll line pitch (Pt) minus the sum of the thickness of the scroll table of the moving and stationary disks (Td+Tj) equals the rotation diameter at which the moving disk 6 can just mesh with the stationary disk 7, that is, D=Pt-(Td+Tj). In a set of mechanisms, the scroll pitch and the rotation diameter are both fixed values. As long as the sum of the thickness of the moving and stationary disks remains unchanged, the correct meshing relationship can be achieved.

[0030] Based on this, see Figure 4 In the present invention, the scroll table cross-sections of the moving disk 6 and the stationary disk 7 are trapezoidal. In the assembled state, the sum of the thicknesses of the scroll tables of the moving and stationary disks at the same height cross-sections can be a certain value, meeting the meshing conditions.

[0031] Specifically, see Figure 5-6 When the cross-section of the scroll table of the movable and stationary disks is set to the traditional rectangle in the prior art and is designed to be a trapezoid in the utility model, under the same displacement and the same movable and stationary disk outline dimensions, the trapezoidal cross-section scroll table of the utility model and the rectangular cross-section scroll table in the prior art use the same base circle and the same rotation diameter, and the median length of the trapezoidal cross-section is equal to the width of the rectangle. Under the same pressure conditions, the compressive resistance of the trapezoidal cross-section is significantly better than that of the rectangular cross-section. It also means that under the same refrigeration output, the size of the compressor movable and stationary disks can be made smaller, thereby achieving lightweighting of the compressor.

[0032] See also Figure 7-8The meshing parts of the scroll bodies of the moving disk 6 and the stationary disk 7 need to be completely symmetrical to ensure the meshing relationship, and the structures of other parts can be flexibly processed as needed. In order to maintain a good meshing relationship, the fine machining of the scroll body parts of the moving disk 6 and the stationary disk 7 can be completed in one go on the same machine tool with the same tool.

[0033] The working principle of this utility model:

[0034] When the cross-section of the scroll table of the movable and stationary disks is set to the traditional rectangle in the prior art and is designed to be a trapezoid in the utility model, under the same displacement and the same movable and stationary disk outline dimensions, the trapezoidal cross-section scroll table of the utility model and the rectangular cross-section scroll table in the prior art use the same base circle and the same rotation diameter, and the median length of the trapezoidal cross-section is equal to the width of the rectangle. Under the same pressure conditions, the compressive resistance of the trapezoidal cross-section is significantly better than that of the rectangular cross-section. This also means that under the same refrigeration output, the size of the compressor movable and stationary disks can be made smaller, thereby achieving lightweighting of the compressor.

[0035] In the description of the present utility model, it should be understood that the terms "upper", "lower", "left", "right", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, and a specific direction structure and operation, and therefore, cannot be understood as a limitation on the present utility model. In addition, "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0036] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] The above is a detailed description of an embodiment of the utility model, but the content is only a preferred embodiment of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of application of the utility model should still fall within the scope of the patent coverage of the utility model.

Claims

1. A scroll compressor with a scroll plate having a trapezoidal cross section, comprising a motor housing (2) and a driving motor arranged in the motor housing (2), wherein a driving end of the driving motor is connected to a moving plate (6); a rear housing (8) is connected to a side of the motor housing (2) away from the driving motor, and a stationary plate (7) meshing with the moving plate (6) is fixedly mounted on the inner side of the rear housing (8); It is characterized in that The cross-sections of the moving plate (6) and the stationary plate (7) are both trapezoidal.

2. The scroll compressor with a trapezoidal scroll plate cross section according to claim 1, characterized in that: The vortex assembly directions of the moving disk (6) and the stationary disk (7) are 180 degrees relative to each other.

3. The scroll compressor with a trapezoidal scroll plate cross section according to claim 1, characterized in that: The drive motor comprises a motor drive component (1) and a motor main shaft (3), wherein the motor main shaft (3) is connected to the output end of the motor drive component (1).

4. The scroll compressor with a trapezoidal scroll plate cross section according to claim 3, characterized in that: A bearing seat (4) is installed inside the motor drive component (1), and the motor main shaft (3) is inserted into the inner ring of the bearing seat (4).

5. The scroll compressor with a trapezoidal scroll plate cross section according to claim 3, characterized in that: An eccentric mechanism (5) is installed on the motor main shaft (3), and the eccentric mechanism (5) is connected to the moving plate (6) via a bearing.

6. The scroll compressor with a trapezoidal scroll plate cross section according to claim 1, characterized in that: The motor housing (2) and the rear housing (8) are detachably connected via a bolt assembly.

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