Scroll compressor of electric vehicle air conditioner

Abstract

The utility model relates to the technical field of refrigeration equipment, in particular to a scroll compressor of an electric car air conditioner, which comprises a shell and further comprises a faceplate arranged in the shell and integrally formed with the shell. The front cover plate is mounted on one side of the shell; the rear cover plate is mounted on the other side of the shell; the main shaft penetrates through the faceplate; the rotor sleeves the outer side of the main shaft; the stator sleeves the outer side of the rotor; the eccentric wheel is connected with one end of the main shaft through an eccentric shaft; the movable scroll plate is connected with an eccentric shaft of the eccentric wheel through a bearing c; the static scroll plate is meshed with the dynamic scroll plate through a bifunctional equation molded line; according to the utility model, the shell and the faceplate are combined into an integral casting, so that the contact surface error of a split type structure is eliminated, the axial tolerance accumulation can be reduced to be less than or equal to 0.05 mm, the offset of the meshing center of a movable / static scroll plate can be controlled to be less than or equal to 0.02 mm, and the vibration amplitude is obviously reduced.

Description

Technical Field

[0001] This utility model relates to the field of refrigeration equipment technology, specifically to a scroll compressor for a tram air conditioner. Background Technology

[0002] A scroll compressor is a compressor with compressible volume consisting of a fixed involute scroll disk and an eccentrically rotating involute scroll disk. A scroll compressor is formed by the interlocking of two bifunctional equation-shaped moving and stationary scroll disks. During the intake, compression, and exhaust processes, the stationary disk is fixed to the frame, while the moving disk, driven by an eccentric shaft and constrained by an anti-rotation mechanism, rotates in a plane around the base circle of the stationary disk with a very small radius. Gas is drawn into the periphery of the stationary disk through an air filter. As the eccentric shaft rotates, the gas is gradually compressed within several crescent-shaped compression chambers formed by the interlocking moving and stationary disks, and then continuously discharged through the axial hole in the central component of the stationary disk.

[0003] When assembling existing scroll compressors, they are assembled one by one along a common axis. The assembly of parts will produce certain errors. However, due to the large number of parts, each part will produce a little error during installation. In the end, the accumulated error will lead to excessive error, causing the meshing center of the moving / stationary scroll to shift, triggering periodic impact vibration, and causing accelerated wear of the bearing raceway, shortening the life to 30%-50% of the normal value.

[0004] In summary, the applicant proposed a scroll compressor for a tram air conditioner. Utility Model Content

[0005] The purpose of this utility model is to provide a scroll compressor for tram air conditioning to save labor costs and improve network security. To achieve the above technical objectives, the technical solution of this utility model is as follows:

[0006] A scroll compressor for an electric vehicle air conditioner includes a housing and further includes:

[0007] The flower plate is disposed inside the shell and is integrally formed with the shell;

[0008] A front cover plate, which is mounted on one side of the housing;

[0009] Rear cover plate, the rear cover plate being mounted on the other side of the housing;

[0010] The main shaft extends through the flower disc;

[0011] Rotor, which is sleeved on the outside of the main shaft;

[0012] Stator, wherein the stator is sleeved on the outside of the rotor;

[0013] An eccentric wheel, wherein the eccentric wheel is connected to one end of the main shaft via an eccentric shaft;

[0014] A moving scroll plate, wherein the moving scroll plate is connected to the eccentric shaft of the eccentric wheel via a bearing c;

[0015] A stationary vortex disk, wherein the stationary vortex disk meshes with the moving vortex disk with a bifunctional equation profile.

[0016] Furthermore, the main shaft is rotatably connected to the disc via bearing a, and the end of the main shaft near the front cover plate is rotatably connected to the front cover plate via bearing b.

[0017] After improvement, this utility model further produces the following beneficial effects:

[0018] 1. This utility model eliminates the contact surface error of the split structure by merging the shell and the flower plate into an integral casting. The axial tolerance accumulation can be reduced to ≤0.05mm, and the offset of the meshing center of the moving / static scroll can be controlled to ≤0.02mm, which significantly reduces the vibration amplitude.

[0019] 2. Since the shell and the flower plate are integrated into a single casting, they can be installed simultaneously in two directions at the same time. That is, only half of the accessories need to be installed in one direction. In this way, the cumulative error will be reduced dramatically. After the tolerance is reduced, the radial runout of the moving scroll plate is reduced from 0.08mm to below 0.02mm, the refrigerant leakage is reduced by 80%, and the volumetric efficiency is increased to ≥95%.

[0020] 3. Error control reduces the wear rate of bearing raceways by more than 50%, and increases the compressor start-stop cycle life from 200,000 times to ≥500,000 times. Attached Figure Description

[0021] Figure 1 Assembly drawing provided for this utility model.

[0022] Figure 2 This assembly drawing provides another perspective on the present invention.

[0023] Figure 3 This is an exploded view of the present invention.

[0024] Figure 4 This is the official drawing of this utility model.

[0025] Figure 5 This is a cross-sectional view of the present invention.

[0026] The components are: 1. Housing; 2. Flower disc; 3. Front cover plate; 4. Rear cover plate; 5. Main shaft; 6. Rotor; 7. Stator; 8. Eccentric wheel; 9. Moving scroll plate; 10. Stationary scroll plate; Detailed Implementation

[0027] To enable those skilled in the art to better understand the technical solution of this utility model, the technical solution of this utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0028] like Figures 1-5 As shown, a scroll compressor for a tram air conditioner includes a housing 1, and further includes:

[0029] Flower plate 2, the flower plate 2 is disposed inside the housing 1 and is integrally formed with the housing 1;

[0030] Front cover plate 3, which is installed on one side of housing 1;

[0031] Rear cover plate 4, the rear cover plate 4 is installed on the other side of the housing 1;

[0032] Main shaft 5, which is disposed through the flower plate 2;

[0033] Rotor 6, which is sleeved on the outside of main shaft 5;

[0034] Stator 7, which is sleeved on the outside of rotor 6;

[0035] An eccentric wheel 8 is connected to one end of the main shaft 5 via an eccentric shaft;

[0036] The moving scroll disk 9 is connected to the eccentric shaft of the eccentric wheel 8 via a bearing c;

[0037] The stationary vortex disk 10 meshes with the moving vortex disk 9 using a bifunctional equation profile.

[0038] Analysis of the causes of cumulative errors:

[0039] Linear superposition tolerance of multiple parts: The existing assembly process requires the sequential installation of components such as moving scroll plate, stationary scroll plate, bearing, and isolation plate along the axis. Due to the superposition of machining tolerances (such as flatness ±0.02mm and coaxiality ±0.03mm) of each layer of parts, the final cumulative axial error can reach 0.1-0.3mm16.

[0040] Defects of split-type housing structure: Traditional split-type housings require independent machining of the upper housing, lower housing and disc (positioning bearing and scroll plate). The contact surfaces of the three are radially offset due to the difference in bolt preload, which further amplifies the centerline deviation (typical value ≥0.05mm)12.

[0041] Inconsistent assembly datum: The moving scroll plate and the stationary scroll plate use the end face of the housing and the end face of the motor rotor as positioning datums respectively. The difference in datums causes the meshing profile to deviate, and the measured center deviation can reach 0.08mm.

[0042] It should be noted that by merging the shell and the flower disc into an integral casting, this utility model eliminates the contact surface error of the split structure, reduces the axial tolerance accumulation to ≤0.05mm, and controls the offset of the meshing center of the moving / static scroll plate to ≤0.02mm, significantly reducing the vibration amplitude.

[0043] In addition, since the shell and the flower plate are integrated into a single casting, they can be installed simultaneously in two directions at several points during installation. That is, only half of the accessories need to be installed in one direction. This will drastically reduce the cumulative error. After the tolerance is reduced, the radial runout of the moving scroll plate is reduced from 0.08mm to below 0.02mm, the refrigerant leakage is reduced by 80%, and the volumetric efficiency is increased to ≥95%.

[0044] The main shaft 5 is rotatably connected to the flower plate 2 via bearing a, and the end of the main shaft 5 near the front cover plate 3 is rotatably connected to the front cover plate 3 via bearing b.

[0045] The specific working method is described below using specific embodiments: Example 1

[0046] This invention combines the shell and the flower disc into an integral casting, eliminating the contact surface error of the split structure. The axial tolerance accumulation can be reduced to ≤0.05mm, and the offset of the meshing center of the moving / static scroll can be controlled to ≤0.02mm, significantly reducing the vibration amplitude. Example 2

[0047] Since the shell and the disc are integrated into a single casting, they can be installed simultaneously in two directions at several points during installation. That is, only half of the accessories need to be installed in one direction. This will drastically reduce the cumulative error. After the tolerance is reduced, the radial runout of the moving scroll plate is reduced from 0.08mm to below 0.02mm, the refrigerant leakage is reduced by 80%, and the volumetric efficiency is increased to ≥95%. Example 3

[0048] By merging the housing and disc into a single casting, the assembly gap of the split structure is eliminated, ensuring that the axial concentricity error of the housing is ≤0.02mm, providing a rigid support base for the rotor system. At the same time, the integrated housing reserves 0.1-0.3mm of axial fine-tuning space, allowing the rotor to generate a small displacement (≤0.05mm) due to the gyroscopic effect when rotating at high speed (≥6000rpm). Meanwhile, the offset is compensated in real time by magnetic levitation bearings to avoid friction and collision.

[0049] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made by adopting the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A scroll compressor of an electric car air conditioner comprising a housing (1), characterized in that, Also include: The flower disc (2) is arranged in the inside of the shell (1), and is integrally formed with the shell (1); Front cover plate (3), the front cover plate (3) is installed on one side of the shell (1); Rear cover plate (4), the rear cover plate (4) is installed on the other side of the shell (1); Main shaft (5), the main shaft (5) is arranged through the flower disc (2); Rotor (6), the rotor (6) is sleeved on the outside of the main shaft (5); Stator (7), the stator (7) is sleeved on the outside of the rotor (6); Eccentric wheel (8), the eccentric wheel (8) is connected with one end of the main shaft (5) through the eccentric shaft; Dynamic scroll (9), the dynamic scroll (9) is connected with the eccentric shaft of the eccentric wheel (8) through bearing c; Static scroll (10), the static scroll (10) is meshed with the dynamic scroll (9) by double function equation type line.

2. A scroll compressor for an electric vehicle air conditioner according to claim 1, wherein: The main shaft (5) is rotatably connected with the flower disc (2) through bearing a, and one end of the main shaft (5) close to the front cover plate (3) is rotatably connected with the front cover plate (3) through bearing b.

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