CN101205912A

CN101205912A - Rotation balance device of enclosed scroll compressor

Info

Publication number: CN101205912A
Application number: CNA2006101304654A
Authority: CN
Inventors: 吴海溱; 阵弘均; 郑澯和
Original assignee: LG Electronics Tianjin Appliances Co Ltd
Current assignee: LG Electronics Tianjin Appliances Co Ltd
Priority date: 2006-12-20
Filing date: 2006-12-20
Publication date: 2008-06-25

Abstract

The invention discloses a rotary balance device of a hermetic scroll compressor, which belongs to an arc engagement rotary piston pump. The invention comprises a drive motor which is arranged inside a shell to generate rotary force; a compression mechanism part which is arranged on a rotational axis of the drive motor and combined with an eccentric part to compress refrigerant; at least more than one balance device which are arranged to counterbalance the rotary imbalance generated on the eccentric part while the rotational axis conducts the rotary motion, wherein, the balance device comprises a main body part which has appointed weight and a combining part which leads the main body part to be combined on the rotational axis, moreover, the balance device is combined with the rotational axis. Therefore, stators of the invention can stably rotate, and the performance loss of the motor can be avoided, thereby providing the compressor with higher reliability.

Description

The rotation balance device of enclosed scroll compressor

Technical field

The present invention relates to the engagement type rotary piston pump of arc, in more detail, it is a kind of relevant rotation imbalance that takes place on the eccentric part of offsetting, and is used for preventing the rotation balance device of the enclosed scroll compressor of motor performance loss.

Background technique

Fig. 1 is the vertical profile structural representation of enclosed scroll compressor in the past; Fig. 2 is the vertical profile enlarged diagram of Fig. 1 equilibrium block combining structure.As shown in the figure, compressor comprises that inside has the casing 11 of airtight containing space, is contained in the compression mechanical part 21 of the internal compression refrigerant of casing 11, and the inside that is installed in casing 11 provides the drive motor of driving force to compression mechanical part 21.

Possess suction pipe 13 and discharge tube 15 in a side of casing 11 for sucking and discharging refrigerant, and for supports compressor structure portion 21 and drive motor, and separate both sides up and down in the inside of casing 11, upper bracket 17 and lower bracket are installed.

Compression mechanical part 21 comprises the scrollwork [lap] 24 of [involute] shape that possesses eddy current, and is fixedly mounted on the static vortex disk 23 of upper bracket 17; The scrollwork 26 that possesses the eddy current shape, and combine with static vortex disk 23 and static vortex disk 23 is done the movable orbiting scroll 25 of circumnutation.

Drive motor is included in casing 11 inside, hard-wired stator 33 and be center rotor rotated 35 with running shaft 37 in the inside of stator 33.In order to make 25 pairs of static vortex disks 23 of movable orbiting scroll do circumnutation, possesses eccentric part 38 in the upper end of running shaft 37.And after eccentric part 38 departed from certain distance from rotating center, the bottom that is combined in movable orbiting scroll 25 did relative motion.In addition, possesses bearing

portion

18,20 separately in upper bracket 17 and lower bracket.The field, top and the field, bottom of

bearing portion

18,20 supporting rotating shafts 37 make the field, top and the rotation of field, bottom of running shaft 37.Rotor 35 be several iron cores (not shown) with cylindric stacked after, be pressed into fixedly running shaft 37 after two ends are blocked with locking ring (end ring) 36.

In addition, offset in order to rotate because of uneven compressor noise and the vibrations that produce of the rotation of eccentric part 38, with running shaft 37 axially be benchmark, in the upper end of locking ring 36 and lower end welding (not shown) or utilize screw (not shown) secure

bond equilibrium block

40,50.

If it is bigger to possess the compressor capacity of equilibrium block, then possess weight heavier equilibrium block relatively, therefore bring the metaboly of rotor 35 bodies, such rotor 35 distortion hinder rotatablely moving of rotor 35, cause the motor performance loss.

Summary of the invention

The present invention proposes for the shortcoming that solves above-mentioned prior art, its purpose is, a kind of rotation balance device of novel enclosed scroll compressor is provided, and prevents the equilibrium block weight because of two ends about the combination on the rotor, the rotor body distortion that is caused prevents what motor performance from losing.

In order to achieve the above object, the rotation balance device of enclosed scroll compressor of the present invention comprises being installed in the inner drive motor that produces rotating force of casing; Be provided on the running shaft of drive motor, and combine and the compression mechanical part of compression refrigerant with eccentric part; Offset the rotation imbalance that takes place on the eccentric part when rotatablely moving for running shaft, and be equipped with at least more than one Equilibrator, this Equilibrator comprises main part with specified wt and can make main part be combined in connecting part on the running shaft, and Equilibrator combines with running shaft.

The rotation balance device of described enclosed scroll compressor, the main part of its Equilibrator and connecting part one constitute.

The rotation balance device of described enclosed scroll compressor, its Equilibrator are to utilize the other parts that are connected and fixed to make main part and connecting part combination.

The rotation balance device of described enclosed scroll compressor, its connecting part adopt the mode that is pressed into to be combined in the outer circumferential face of running shaft.

The rotation balance device of described enclosed scroll compressor in order to prevent to rotate after Equilibrator is combined in running shaft, possesses rotation separately and prevents face on running shaft outer circumferential face and corresponding with it connecting part inner peripheral surface.

The present invention has following effect: heavier because of equilibrium block weight, bear a heavy burden and alleviate the support that rotor bears, and can make the rotor stability rotation, therefore, can prevent the drive motor performance loss that the distortion of rotor body causes, improve the reliability of compressor.

Description of drawings

Fig. 1 is the vertical profile structural representation of enclosed scroll compressor in the past;

Fig. 2 is the vertical profile enlarged diagram of Fig. 1 equilibrium block combining structure;

Fig. 3 is an enclosed scroll compressor vertical profile structural representation of the present invention;

Fig. 4 is that the Equilibrator of Fig. 3 is combined in the plane structure chart on the running shaft;

Fig. 5 is the Equilibrator combining structure vertical profile schematic representation of another embodiment of the present invention;

Fig. 6 is that the Equilibrator of Fig. 5 is combined in the plane structure chart on the running shaft.

The explanation of accompanying drawing major component symbol:

135: rotor 137: running shaft

138: eccentric part 140,145,150: Equilibrator

141,146: main part 142,147: connecting part

R: rotation prevents face

Embodiment

The present invention is described in detail below in conjunction with drawings and Examples.

Fig. 3 is an enclosed scroll compressor vertical profile structural representation of the present invention; Fig. 4 is that the Equilibrator of Fig. 3 is combined in the plane structure chart on the running shaft.

As shown in the figure, compressor comprises that inside possesses the casing 111 of airtight containing space; Possess the static vortex disk 123 and the movable orbiting scroll 125 that do relative motion mutually, and be installed in the compression mechanical part 121 of field, the top compression refrigerant of casing 111 inside; The 121 times side direction compression mechanical parts 121 of compression mechanical part that are installed in casing 111 inside provide the drive motor of driving force.

Drive motor is included in stator 133 that the internal fixation of casing 111 installs and is the rotatable rotor 135 in center in the inside of stator 133 with running shaft 137.In addition, possesses eccentric part 138 in the upper end of running shaft 137 for eccentric drive movable orbiting scroll 125.

In addition, in order when running shaft 137 rotatablely moves, to offset the rotation imbalance that takes place because of eccentric part 138, between the compression mechanical part 121 and drive motor of compression refrigerant gas, the Equilibrator 140 of secure bond one embodiment of the invention.

Equilibrator 140 is the main parts 141 with specified wt, and the connecting part 142 that main part 141 is combined on the running shaft 137 is integrally formed.

Connecting part 142 is thermal expansion and the cold contraction principles that utilize metal, and the mode that adopts heat to insert is pressed on the outer circumferential face that is combined in running shaft 137.

Here, connecting part 142 can also perhaps utilize screw multiple modes such as (not shown) to be fixed on the running shaft 137 by welding.

In addition, the rotation that possesses D shape cutting (cut) mode at running shaft 137 outer circumferential faces and corresponding with it connecting part 142 inner peripheral surfaces separately prevents face (R), after being pressed into the outer circumferential face that is combined in running shaft 137 at Equilibrator 140, because of Equilibrator 140 can firmly be combined on the running shaft 137, be best during startup and do not rotate phenomenon.

In front, Equilibrator 140 is structures of main part 141 and connecting part 142 integral productions, still, and the structure that main part 141 and connecting part 142 mutually combine after can also constituting and making separately.

For example, as shown in Figure 5 and Figure 6, a side of main part 146 is recessed to form with designated depth, constitutes the form that picture wraps connecting part 147, and the mode that adopts heat to insert is pressed into combination then.

Connecting part 147 is principles of utilizing thermal expansion metal and cold contraction, and the mode that adopts heat to insert is pressed into the structure that is combined in running shaft 137 outer circumferential faces.

Here, if connecting part 147 be with running shaft 137 on the structure that combines, just can adopt multiple mode (weld or utilize screw etc.) to fix.And, firmly be combined on the connecting part 147 in order to make main part 146, utilize secure component secure such as screw B.

At this moment, on the inner peripheral surface of running shaft 137 outer circumferential faces and corresponding with it connecting part 147, the rotation that possesses D shape cutting mode separately prevents face R, then Equilibrator 145 is pressed into the outer circumferential face that is combined in running shaft 137, not rotate phenomenon on the running shaft 137 be best because of Equilibrator 145 firmly is combined in during startup.

Describe the present invention of said structure below in detail.

133 li turn-on powers of the stator of drive motor, rotor 135 rotations, then running shaft 137 rotatablely moves with rotor 135.

At this moment, possess the eccentric part 138 that departs from distance to a declared goal from rotating center, make movable orbiting scroll 125 relative static vortex disks 123 do circumnutation, therefore, produce noise and vibrations on the compressor in the upper end of running shaft 137.In order to prevent to produce noise and vibrations, next lateral deviation heart secure bond Equilibrator is offset the eccentric gravity of running shaft 137 with this on rotor 135.

Be in the compressor of the present invention, the Equilibrator of rotor 135 tops one side does not have the end of secure bond at rotor 135, but secure bond is on running shaft 137, therefore, the drive motor performance loss that 135 distortion of greater weight rotor cause can be prevented, the compressor reliability can be improved.

In the middle of above-mentioned two embodiments, Equilibrator is provided between compression mechanical part 121 and the drive motor, and with running shaft 137 secure bond, but the scope of the invention can not be limited in the middle of the foregoing description scope, and as another embodiment (not shown), with the drive motor be the downside Equilibrator 150 of benchmark also can secure bond on running shaft 137.

Claims

1. the rotation balance device of an enclosed scroll compressor comprises being installed in the inner drive motor that produces rotating force of casing; Be provided on the running shaft of drive motor, and combine and the compression mechanical part of compression refrigerant with eccentric part, it is characterized in that, offset the rotation imbalance that takes place on the eccentric part when rotatablely moving for running shaft, and be equipped with at least more than one Equilibrator, this Equilibrator comprises main part with specified wt and can make main part be combined in connecting part on the running shaft, and Equilibrator combines with running shaft.

2. the rotation balance device of enclosed scroll compressor according to claim 1 is characterized in that the main part of Equilibrator and connecting part one constitute.

3. the rotation balance device of enclosed scroll compressor according to claim 1 is characterized in that Equilibrator is to utilize the other parts that are connected and fixed to make main part and connecting part combination.

4. the rotation balance device of enclosed scroll compressor according to claim 1 is characterized in that the connecting part adopts the mode that is pressed into to be combined in the outer circumferential face of running shaft.

5. according to the rotation balance device of the described any enclosed scroll compressor of claim 1 to 4, it is characterized in that, in order to prevent to rotate after Equilibrator is combined in running shaft, on running shaft outer circumferential face and corresponding with it connecting part inner peripheral surface, possess rotation separately and prevent face.