CN203809299U - Outer rotor compressor - Google Patents

Abstract

The utility model relates to an outer rotor compressor with good balance. A crankshaft of the outer rotor compressor is not easy to loosen. The outer rotor compressor comprises a motor of an outer rotor, a crankshaft, a connecting rod, a piston and a cylinder, wherein counterweight holes (801) with clump weights embedded inside, which are uniformly distributed along the circumferential direction at intervals, are formed in the lower end face of the outer rotor (8), close to the periphery; groove-shaped through holes (802) uniformly distributed along the circumferential direction are also formed in the lower end face of the outer rotor; an elastic bush (11) is arranged in the center of the lower end of the outer rotor; axial sectioned grooves (1101) uniformly distributed along the circumferential direction are formed in the external section of the elastic bush; the elastic bush is sleeved in the lower end of the crankshaft (10); a hoop (12) is sleeved outside the elastic bush in an interference manner; key grooves (901) are formed in the peripheral wall of the center hole of a stator (9). The outer rotor compressor is used as a refrigeration compressor.

Description

A kind of external rotor compressor

Technical field

The utility model relates to compressor, particularly external rotor compressor.

Background technique

It is little that external rotor compressor has volume, the feature that moment of torsion is large.But the external rotor of its motor of external rotor compressor of the prior art is without junction at equilibrium member, when being used in the compressor of relatively high power, the defect that motor balance quality lowly causes is just comparatively outstanding, one of them obvious problem is vibration and the noise that motor imbalance causes, and the external rotor of external rotor electric machine is cantilever-type configuration, for iron core adds die casting, form again, be difficult to work in-process once balance.In addition, the bent axle coordinating with external rotor adopts simple press mode to be assemblied in external rotor, easily produces loosening.

Summary of the invention

The utility model will solve external rotor compressor of the prior art because rotor easily causes motor oscillating and produces large noise without junction at equilibrium member, and the easy loosening problem of the bent axle assembling on external rotor, a kind of external rotor compressor of the present utility model is provided for this reason, this external rotor compressor electric motor balance quality is good, and bent axle is not easy to become flexible.

For addressing the above problem, the technical solution adopted in the utility model is to have external rotor electric machine, bent axle, connecting rod, piston and cylinder, its special way is that nearly periphery place, the lower end surface of described external rotor offers the circumferential counterweight hole of setting balancing weight uniformly at intervals, external rotor lower end surface also offers circumferentially uniform grooved through hole, center, external rotor lower end has resilient bushing, the outer sections of this resilient bushing has circumferentially uniform axial splitting groove, described bent axle is placed on described resilient bushing in underpart, this interference ground, resilient bushing outside overcoat has anchor ear, the center hole perisporium of described stator offers keyway.

The resilient bushing of center, external rotor described in the utility model lower end can be and the integrated resilient bushing of external rotor.

The resilient bushing of center, described external rotor lower end is placed on the resilient bushing of external rotor center hole in can being also, the periphery wall of this resilient bushing is provided with anti-rotation convex tendon or groove.

The utility model preferably supported spring lower end connected spring seat of the movement of described compressor is fixedly welded on lower shell body inwall, the position being welded and fixed is in high lower shell body bottom surface one distance, comparable spring like this is placed in housing bottom, reduce movement supporting gravity height, reduce rocking vibration and touch shell phenomenon.

In bent axle, be placed on described resilient bushing, the step that is coated to anchor ear interference resilient bushing is first anchor ear to be heated, and after heat expansion hole enlargement, is inserted in spring bushing, after the cooling undergauge of anchor ear, holds resilient bushing tightly, and resilient bushing is held bent axle again tightly.

For adapting to the needs of AC and DC, frequency conversion, can circumferentially be embedded with in uniform way dovetail magnetic shoe at the inwall of described external rotor.

The utility model is because the lower end surface of external rotor offers the circumferential counterweight hole of setting balancing weight uniformly at intervals, when external rotor carries out Balance Treatment adjustment by self-driving type balance, can the balance that balancing weight is realized external rotor be installed at imbalance point, thereby the stationarity while realizing compressor operation, to reduce vibration and noise.Again because center, external rotor lower end has resilient bushing, this resilient bushing has circumferentially uniform axial splitting groove, also be provided with the anchor ear of resilient bushing after interference ground overcoat, therefore bent axle underpart inner sleeve resilient bushing, interference ground, resilient bushing outside overcoat anchor ear, bent axle can be connected in to external rotor center tightly, be difficult for loosening.Supported spring seat is welded in lower shell body inwall higher than the utility model of bottom surface one distance, can reduce height of movement, solves supported spring and is placed in housing bottom and easily causes that larger vibrations wave and touch shell phenomenon.

Accompanying drawing explanation

Fig. 1 is the utility model overall structure schematic diagram;

Fig. 2 is the structural representation that Fig. 1 the utility model is removed footing piece and upper and lower casing;

Fig. 3 is that Fig. 2 structure rotates the structural representation of 180 ° up and down;

Fig. 4 is external rotor one structural representation in the utility model, and it is one-body molded with external rotor that elasticity is mended cover;

Fig. 5 is another structural representation of external rotor in the utility model, and elasticity is mended in cover and is placed on external rotor center hole;

Fig. 6 is that Fig. 4 or Fig. 5 external rotor rotate 180 ° of structural representations up and down;

Fig. 7 is the stator structure schematic diagram in the utility model.

Mark and counterpart in figure: 1 footing piece, 2 lower shell bodys, 3 spring seats, 4 supported springs, 5 upper shells, 6 pistons, 7 connecting rods, 8 external rotors, 801 counterweight holes, 802 grooved through holes, 9 stators, 901 keyways, 10 bent axles, 11 resilient bushings, 1101 splitting grooves, 12 anchor ears, 13 dovetail magnetic shoes.

Embodiment

A kind of external rotor compressor, lower shell body 2 inwalls installed on footing piece 1 are soldered spring seat 3, welding position is higher than lower shell body bottom surface one distance, spring seat is provided with supported spring 4, compressor movement is installed on above supported spring, the motor that comprises external rotor 8 and stator 9 is installed in lower shell body, the structure that stator center hole adopts key pin to be connected with frame connecting part, this key pin is placed in the set keyway 901 of stator center hole hole wall, the nearly periphery place, lower end surface of external rotor 8 offers the circumferential counterweight hole 801 of setting balancing weight uniformly at intervals, external rotor lower end surface also offers circumferentially uniform grooved through hole 802, in case stop machine wet goods stockpiles, for adapting to, hand over, direct current, the needs of frequency conversion can circumferentially be embedded with magnetic shoe 13 in uniform way at the inwall of external rotor, in the center hole of external rotor lower end, set and be fixed with resilient bushing 11, this resilient bushing outer wall is provided with convex tendon or the groove of anti-rotation, the outer sections of this resilient bushing has circumferentially uniform axial splitting groove 1101, bent axle is placed on resilient bushing 11 in 10 underparts, this interference ground, resilient bushing outside overcoat has anchor ear 12, on bent axle, be pivoted connecting rod 7, connecting rod and piston 6 are pivoted, movement top is provided with upper shell 5.

In resilient bushing in present embodiment, be placed on the center hole of external rotor, referring to Fig. 5.As another mode of execution, described resilient bushing 11 also can be one-body molded with external rotor, referring to Fig. 4.

Claims (5)

1. an external rotor compressor, there is external rotor electric machine, bent axle, connecting rod, piston and cylinder, the nearly periphery place, lower end surface that it is characterized in that described external rotor (8) offers the circumferential counterweight hole (801) of setting balancing weight uniformly at intervals, external rotor lower end surface also offers circumferentially uniform grooved through hole (802), center, external rotor lower end has resilient bushing (11), the outer sections of this resilient bushing has circumferentially uniform axial splitting groove (1101), described bent axle (10) is placed on described resilient bushing in underpart, this interference ground, resilient bushing outside overcoat has anchor ear (12), the center hole perisporium of stator (9) offers keyway (901).

2. external rotor compressor as claimed in claim 1, is characterized in that the resilient bushing of center, described external rotor lower end is and the integrated resilient bushing of this resilient bushing.

3. external rotor compressor as claimed in claim 1, the resilient bushing that it is characterized in that center, described external rotor lower end is placed on the resilient bushing of external rotor center hole in being, and the perisporium of this resilient bushing is provided with anti-rotation convex tendon or groove.

4. external rotor compressor as claimed in claim 1, is characterized in that supported spring (4) the lower end connected spring seat (3) of the movement of described compressor is fixedly welded on lower shell body (2) inwall, and the position being welded and fixed is in high lower shell body bottom surface one distance.

5. the external rotor compressor as described in a claim as any in claim 1 to 4, is characterized in that the inwall of described external rotor is circumferentially embedded with dovetail magnetic shoe (13) in uniform way.