CN202628530U

CN202628530U - Rotary compressor

Info

Publication number: CN202628530U
Application number: CN 201220331443
Authority: CN
Inventors: 曹银松; 任丽萍; 曹为
Original assignee: Zhuhai Gree Energy Saving Environmental Protection Refrigeration Technology Research Center Co Ltd
Current assignee: Zhuhai Gree Energy Saving Environmental Protection Refrigeration Technology Research Center Co Ltd
Priority date: 2012-07-09
Filing date: 2012-07-09
Publication date: 2012-12-26
Anticipated expiration: 2022-07-09

Abstract

The utility model provides a rotary compressor, which comprises a crankshaft and a motor rotor, wherein the crankshaft comprises an eccentric part, and a short axis and a long axis which are respectively positioned at two ends of the eccentric part; the motor rotor is arranged on the long axis in a matching mode; the long axis is a stepped axis and comprises a first axis section matched with an inner hole of the motor rotor; a first end of the first axis section is provided with a stepped surface matched with the end of the motor rotor; a second end of the first axis section is provided with a threaded part; and a circumferential fixing piece through which the motor rotor is fixed in the circumferential direction is arranged on the first axis section. According to the compressor, the stepped surface is formed on the crankshaft and the thread is formed at the shaft end, during installation, one end of the motor rotor is pressed against on the stepped surface, the other end of the motor rotor is fixed through a nut, and the motor rotor is axially fixed. In addition, the circumferential fixing piece is arranged on the crankshaft, so that the motor rotor and the crankshaft are fixed in the circumferential direction. According to the nut and the circumferential fixing piece, the motor rotor is detachably connected, so that the problem that the compressor is difficult to detach in a common shrinkage fit mode is solved.

Description

Rotary compressor

Technical field

The utility model relates to compressor field, in particular to a kind of rotary compressor.

Background technique

In the existing technology, the rotor 20 and the bent axle 10 of rotary compressor are generally interference fit, and the main installation method that adopts is the hot jacket method, and promptly heating rotor 20 expands its endoporus and is enclosed within bent axle 10 then earlier, and is as shown in Figure 1.Though the Placement of hot jacket is comparatively simple and convenient, cost is also lower.But this Placement also has its shortcoming and narrow limitation: the first, and hot jacket need if temperature control is improper, possibly causes the aluminium core thawing of cast-aluminum motor rotor 20 and cause rotor 20 impaired rotor 20 heating; The second, to the frequency-changeable compressor rotor 20 that has magnetized, heating can cause the magnet steel demagnetization to be lost efficacy, and the frequency-changeable compressor rotor 20 that has promptly magnetized can not adopt the method for hot jacket; The 3rd, as far as micro-compressor, rotor 20 sizes are too little, and heating can make rotor 20 distortion have a strong impact on its performance; Yet for large-scale compressor, its rotor 20 sizes are owing to also can cause heating the comparatively problem of difficulty too greatly; The 4th, the mode of hot jacket is on-disconnectable connection, may cause part to be out of shape or to destroy after forcing to take apart, can not reuse, so hot jacket is not suitable for removable compressor yet.

The model utility content

The utility model aims to provide the rotary compressor that a kind of rotor and bent axle removably connect, and is connected the problem that can cause part deformation after dismantling with bent axle to solve rotor that the hot jacket mode connects.

The utility model provides a kind of rotary compressor; Comprise bent axle and rotor, bent axle comprises eccentric part and the minor axis and the major axis that lay respectively at the eccentric part two ends, and rotor is equipped with on major axis; Major axis is the step axle; Have first shaft part that cooperates with the endoporus of rotor, first end of first shaft part has the step surface that cooperates with the rotor end, and second end of first shaft part has the screw section; Also be provided with the circumferential fixed block that makes rotor circumferentially fixing on first shaft part.

Further, second end of first shaft part also has circumferential inserted part, and circumferentially fixed block is the actuator that is fixedly connected with rotor, and the center of actuator has the blocked hole that cooperates with circumferential inserted part.

Further, circumferentially the cross section of inserted part is D shape, and blocked hole is D shape hole.

Further, circumferentially the cross section of inserted part is polygonal, and blocked hole is a polygonal hole.

Further, circumferentially the inserted part comprise at least two load planes that are distributed on its periphery, blocked hole cooperates with circumferential inserted part.

Further, actuator and rotor riveted joint.

Further, actuator is connected through screw with rotor.

Further, circumferentially fixed block is a key, and first shaft part and rotor are provided with the keyway that matches.

Further, circumferentially fixed block is a pin, and first shaft part is provided with vertical also through the pin-and-hole of its axis, offers on the rotor and the corresponding cotter way of pin-and-hole.

According to the compressor of the utility model, through step surface being set on bent axle and at axle head screw thread being set, during installation, an end of rotor is connected on the step surface, and the other end is fixed through nut, realizes the axial restraint of rotor.In addition, circumferential fixed block is set on bent axle, thereby realizes the circumferentially fixing of rotor and bent axle.Realize removably connecting of rotor through nut and circumferential fixed block, thereby solved the problem that common hot jacket mode is difficult to dismantle.

Description of drawings

The accompanying drawing that constitutes the application's a part is used to provide the further understanding to the utility model, and illustrative examples of the utility model and explanation thereof are used to explain the utility model, do not constitute the improper qualification to the utility model.In the accompanying drawings:

Fig. 1 is the bent axle of rotary compressor of the prior art and the decomposition texture schematic representation of rotor;

Fig. 2 is according to first embodiment's of the rotary compressor of the utility model the bent axle and the decomposition texture schematic representation of rotor;

Fig. 3 is according to second embodiment's of the rotary compressor of the utility model the bent axle and the decomposition texture schematic representation of rotor; And

Fig. 4 is according to the 3rd embodiment's of the rotary compressor of the utility model the bent axle and the decomposition texture schematic representation of rotor.

Embodiment

Below with reference to accompanying drawing and combine embodiment to specify the utility model.

As shown in Figure 2; According to first embodiment of the rotary compressor of the utility model, comprise bent axle 10 and rotor 20, bent axle 10 comprises eccentric part 11 and minor axis that lays respectively at eccentric part 11 two ends 12 and major axis 13; Rotor 20 is equipped with on major axis 13; Major axis 13 is the step axle, and having first shaft part, 132, the first shaft parts that cooperate with the endoporus 21 of rotor 20 is circular shaft; Second end that first end of first shaft part 132 has step surface 131, the first shaft parts 132 that cooperate with rotor 20 ends has screw section 133; Also be provided with the circumferential fixed block that makes rotor 20 circumferentially fixing on first shaft part 132.The compressor of the utility model, through step surface 131 being set on bent axle 10 and at axle head screw thread being set, during installation, an end of rotor 20 is connected on the step surface 131, and the other end is fixing through nut 50, realizes the axial restraint of rotor 20.In addition, circumferential fixed block is set on bent axle 10, thus the circumferential and axial of realizing rotor and bent axle fix, realized removably connecting of rotor, thereby solved the problem that common hot jacket mode is difficult to dismantle.

As shown in Figure 2; Second end of first shaft part 132 also has circumferential inserted part 134; Circumferentially fixed block is the actuator 30 that is fixedly connected with rotor 20; The center of actuator 30 has the blocked hole 31 that cooperates with circumferential inserted part 134, blocked hole 31 and circumferentially inserted part 134 clampings, thus make actuator 30 circumferentially fixing.And actuator 30 is fixedly connected with rotor 20, and promptly actuator 30 has all been realized circumferentially fixing with rotor 20.

Preferably, circumferentially the cross section of inserted part 134 is D shape, promptly axially on the inserted part 134 plane is set, and accordingly, blocked hole 31 is D shape hole, and D shape hole and cross section are the circumferential inserted part 134 mutual clampings of D shape, thereby realizes circumferentially fixing.Adopt the clamping of D shape face, because clamping face is the plane, the moment of torsion that can bear is bigger, so can be applicable to the type that moment of torsion is bigger.Analogy ground also can circumferentially be provided with a plurality of loads plane on the inserted part 134, and a plurality of loads plane is stressed jointly, and a plurality of uniform plane are distributed on the outer circumferential face of circumferential inserted part 134, and separate through arc surface each other between a plurality of plane.The cross section that is circumferential inserted part 134 is that straightway and arc section combine, as is set to two planes, and two planes are parallel to each other, compare the cross section that has only a load plane and be the circumferential inserted part 134 of D shape and can bear bigger moment,

When circumferential inserted part 134 had both had the load plane, when having arc surface again, can be with screw section 133 and circumferentially inserted part 134 one design, promptly on the arc surface of circumferential inserted part 134, screw thread is set, thereby with the nut 50 axial restraint rotor that is spirally connected.

When circumferential inserted part 134 lays respectively at the different shaft part on the axle with screw section 133, can circumferential inserted part 134 be set to polygonal, like quadrilateral, pentagon etc.; The polygonal hole of blocked hole 31 for matching, thus each face is all realized clamping, makes connection more stable; Circumferentially fixing more reliable; And then in the screw section 133 fastening nuts 50, thereby rotor 20 two ends are connected to respectively on step surface 131 and the nut 50, realize the axial restraint of rotor 20.

In this embodiment, rotor 20 is connected through rivet 40 or screw with actuator 30, and rotor 20 is provided with rivet hole 22 or the screw hole that matches with screw or rivet.

As shown in Figure 3, according to second embodiment of the utility model, be not both with first embodiment; Circumferentially fixed block is that key 60, the first shaft parts 132 are provided with keyway 135, and rotor 20 is provided with corresponding keyway 23; Key 60 is arranged in the keyway, thereby realizes the circumferentially fixing of rotor 20 and bent axle 10, then nut 50 is tightened on the screw section 133; Make first end and step surface 131 butts of rotor 20, realize that the axial and circumferential of rotor are fixed.

As shown in Figure 4, according to the 3rd embodiment of the utility model, circumferentially fixed block is that pin 70, the first shaft parts 132 are provided with pin-and-hole 136, and preferably, for easy to process and stressed even, pin-and-hole 136 is vertical also through the axis at first shaft part 132.Offer on the rotor 20 and pin-and-hole 136 corresponding cotter ways 24; During installation; To sell 70 earlier and be located in the pin-and-hole 136, and then will sell the cotter way 24 on the 70 aligning rotors 20, rotor 20 will be set on first shaft part 132; Be tightened on the screw section 133 with nut 50 then, thereby realize the axially fixing of rotor with circumferentially.

From above description, can find out that the utility model the above embodiments have realized following technique effect:

The preferred embodiment that the above is merely the utility model is not limited to the utility model, and for a person skilled in the art, the utility model can have various changes and variation.All within the spirit and principle of the utility model, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection domain of the utility model.

Claims

1. rotary compressor; Comprise bent axle (10) and rotor (20); Said bent axle (10) comprises eccentric part (11) and lays respectively at the minor axis (12) and the major axis (13) at said eccentric part (11) two ends; Said rotor (20) is equipped with on said major axis (13), it is characterized in that

Said major axis (13) is the step axle; Has first shaft part (132) that cooperates with the endoporus (21) of said rotor (20); First end of said first shaft part (132) has the step surface (131) that cooperates with said rotor (20) end, and second end of said first shaft part (132) has screw section (133);

Also be provided with the circumferential fixed block that makes said rotor (20) circumferentially fixing on said first shaft part (132).

2. rotary compressor according to claim 1 is characterized in that,

Second end of said first shaft part (132) also has circumferential inserted part (134); Said circumferential fixed block is the actuator (30) that is fixedly connected with said rotor (20), and the center of said actuator (30) has the blocked hole (31) that cooperates with said circumferential inserted part (134).

3. rotary compressor according to claim 2 is characterized in that,

The cross section of said circumferential inserted part (134) is D shape, and said blocked hole (31) is D shape hole.

4. rotary compressor according to claim 2 is characterized in that,

The cross section of said circumferential inserted part (134) is polygonal, and said blocked hole (31) is a polygonal hole.

5. rotary compressor according to claim 2 is characterized in that,

Said circumferential inserted part (134) comprise at least two load planes that are distributed on its periphery, said blocked hole (31) cooperates with said circumferential inserted part (134).

6. rotary compressor according to claim 2 is characterized in that,

Said actuator (30) and said rotor (20) riveted joint.

7. rotary compressor according to claim 2 is characterized in that,

Said actuator (30) is connected through screw with said rotor (20).

8. rotary compressor according to claim 1 is characterized in that,

Said circumferential fixed block is key (60), and said first shaft part (132) and said rotor (20) are provided with the keyway that matches.

9. rotary compressor according to claim 1 is characterized in that,

Said circumferential fixed block is pin (70), and said first shaft part (132) is provided with vertical also through the pin-and-hole (136) of its axis, offers on the said rotor (20) and the corresponding cotter way of said pin-and-hole (136) (24).