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Rotary compressor and crankshaft thereof

A technology for rotating compressors and crankshafts, which is applied in the field of compressors, and can solve the problems of increasing the running resistance of compressors, strict requirements on magnetic permeability, and increased wear of crankshafts and bearings, so as to reduce gas resistance, reduce weight, and rotate Effect of Eccentric Inertial Force Reduction

Inactive Publication Date: 2015-10-07
GUANGDONG MEIZHI COMPRESSOR +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using this method can effectively reduce the noise and vibration of the compressor, but since the balance weight is installed on the motor rotor, in order to avoid the decline of the motor efficiency, the requirements for the magnetic permeability of the balance weight material are relatively strict, resulting in high cost of the balance weight material
In addition, after the balance weight is added to the motor rotor, the balance weight will be subjected to a large gas force during the operation of the compressor, which will increase the running resistance of the compressor, resulting in a decrease in the energy efficiency of the compressor, and even the high-speed rotation of the compressor. The middle balance weight produces a large inertial force, which will also increase the wear between the crankshaft and the bearing when the inertial force acts on the crankshaft

Method used

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  • Rotary compressor and crankshaft thereof
  • Rotary compressor and crankshaft thereof
  • Rotary compressor and crankshaft thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] In this example, if figure 2 and image 3 As shown, the weight-reducing balance hole 63 is a through hole through the eccentric portion 62 up and down, thus, the processing of the weight-reducing balance hole 63 is more convenient, the production cost of the crankshaft 6 is lower, and the eccentric mass of the eccentric portion 62 can be greatly reduced. .

[0077] Specifically, such as image 3 As shown, the cross-section of the weight-reducing balance hole 63 is generally fan-shaped, and the center of the fan-shaped coincides with the central axis L1 of the main shaft portion 61 . In this way, the mass center of the eccentric portion 62 can be moved to the central axis L1 of the main shaft portion 61 as much as possible, so that the mass center of gravity of the crankshaft 6 is close to the central axis of rotation, which is beneficial to reduce the vibration and noise of the compressor, and is convenient to reduce or even avoid the use of balance. Block 13.

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Embodiment 2

[0081] In this example, if Figure 7 and Figure 8 As shown, the structure of the crankshaft 6 is substantially the same as the structure of the crankshaft 6 in the first implementation, and this will not be repeated.

[0082] The difference is that, in the second embodiment, the weight-reducing balance hole 63 is provided with a reinforcing rib 64, and the setting of the reinforcing rib 64 is equivalent to dividing the weight-reducing balance hole 63 into two or more sub-weight-reducing The more reinforcing ribs 64 are provided for the holes 630, the more the number of sub-weight-reducing holes 630 divided by the weight-reducing balance hole 63 will be. The purpose of this design is to prevent the eccentric part 62 from breaking due to excessive decrease in stiffness during the weight reduction process by strengthening the reinforcing effect of the rib plate 64 .

[0083] It should be noted that if the stiffness of the eccentric portion 62 of the crankshaft 6 decreases too ...

Embodiment 3

[0089] In this example, if Figure 9 to Figure 13 As shown, the structure of the crankshaft 6 is substantially the same as the structure of the crankshaft 6 in the first implementation, and this will not be repeated.

[0090] The difference is that in the third embodiment, as Figure 9 As shown, the crankshaft 6 also includes: a horizontal partition 65, which is perpendicular to the central axis L1 of the main shaft portion 61 and is arranged in the weight-reducing balance hole 63, and the outer peripheral surface of the horizontal partition 65 and the weight-reducing balance hole The inner peripheral surface of 63 is at least partially attached in the circumferential direction. The horizontal partition 65 is supported on the thin wall of the eccentric part 62 to form the weight-reducing balance hole 63, which is conducive to improving the rigidity of the eccentric part 62 of the crankshaft 6, and avoiding gas leakage caused by excessive deformation of the eccentric part 62 u...

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Abstract

The invention discloses a rotary compressor and a crankshaft thereof. The crankshaft comprises a main shaft part and an eccentric part formed on the main shaft part, wherein a weight-reduction balance hole is formed in the eccentric part; and a ratio of the volume of the weight-reduction balance hole to the volume of the eccentric part is greater than or equal to 8%. According to the embodiment of the invention, the crankshaft can reduce eccentric mass of the crankshaft on the premise of keeping eccentricity of the crankshaft unchanged, can shorten a distance that the center of gravity of the crankshaft deviates from a rotary central axis, simultaneously can reduce rotary eccentric inertia force of the rotary compressor using the crankshaft, can reduce vibration and noises of the compressor, and can improve long-time operation reliability of the compressor. Moreover, due to the reduction of the rotary eccentric inertia force, the weight of a balance block in the compressor can be conveniently reduced, and even the balance block can be avoided, so that the manufacturing cost of the compressor is reduced; and meanwhile, gas resistance to the balance block during operation can be reduced, and the energy efficiency of the compressor is improved.

Description

technical field [0001] The invention relates to the field of compressors, in particular to a rotary compressor and a crankshaft thereof. Background technique [0002] For rotary compressors, the main working part is the rolling piston nested on the eccentric crankshaft. When the compressor motor is powered on, the eccentric crankshaft connected to the motor rotor will drive the rolling piston to do eccentric movement in the compression chamber of the pump body. Thereby realizing the compression of the refrigerant gas. This type of mechanism is widely used in various refrigeration equipment technical fields due to its simple structure and high compression efficiency. [0003] Due to the eccentric rotation structure, the center of gravity of the moving parts is not on the rotating shaft, so the compressor will generate a rotational inertial force when it is running, and its direction points to the eccentric direction. The existence of eccentric inertial force will increase t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04C29/00F16C3/06F16C3/20
Inventor 吴灏刘科种
Owner GUANGDONG MEIZHI COMPRESSOR
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