CN100414109C - Rotating shaft fixer of rotary compressor - Google Patents

Abstract

The present invention discloses a rotating shaft fixer of a rotary compressor. The rotating shaft fixer of a rotary compressor of the present invention is arranged in a rotary compressor which uses an upper bearing and a lower bearing for supporting an eccentric part of a rotating shaft and uses a rolling ring pressed on the eccentric part and rotated in a cylinder for compressing coolant. A rotor is supported by the upper end of the upper bearing contacted with the rotor to form a first thrust bearing part for bearing the axial load of the rotating shaft. The rotating shaft fixer of a rotary compressor of the present invention uses a thrust surface of the upper bearing to support a sliding surface formed at the lowest end of the rotor, namely that the first thrust bearing part and a second thrust bearing part are used for bearing the load which can act along the axial direction of the rotating shaft. Thus, the processing area of the eccentric part of the rotating shaft which is difficult to process is reduced, noise, friction and power consumption are also reduced, and the compression efficiency of the compressor is increased.

Description

The running shaft fixing device of rotary compressor

Technical field

The present invention relates to a kind of running shaft fixing device of rotary compressor, the lower end surface that the thrust surface that particularly relates to a kind of available upper bearing comes support rotor is forming thrust bearing portion, but and the running shaft fixing device of the rotary compressor of supporting rotating shaft.

Background technique

In general, rotary compressor is not to rely on centrifugal force, but by the rotation of rolling ring in the cylinder refrigerant is compressed, promptly rely on the off-centre be installed in the running shaft bottom to roll ring and do rotation and revolution motion and refrigerant is sucked and compress along the inner peripheral surface of cylinder.Fig. 1 is the rotary compressor forward sectional view of prior art.As shown in Figure 1, the inside of the rotary compressor of prior art is formed with confined space, and it comprises: the seal container 10 that is provided with suction pipe 1 that refrigerant can be sucked and the discharge tube 2 that refrigerant can be discharged; Produce the motor part 20 of rotating force by the interaction that is located at stator 21 in the seal container 10 and rotor 22; Be located at the inside of seal container 10, link to each other with motor part 20 and be driven by it, and the press part 30 that the refrigerant that sucks can be compressed; With link to each other with the suction pipe 1 of seal container 10, and can be drawn into the liquid container 40 that impurity in the refrigerant in the press part 30 and liquid coolant are removed.Described press part 30 is by constituting with lower member: be pressed into the inner peripheral surface of rotor 22, the bottom is formed with eccentric part 31a and end face is circular running shaft 31; Be located at the inside of seal container 10, link to each other by bolt 34 with lower bearing 33, be provided with eccentric part 31a between upper bearing 32 and the lower bearing 33, and radially be formed with the cylinder 35 of the suction passage 35a of perforation with the upper bearing 32 of supporting rotating shaft 31; Inner circumferential surface contacts with the eccentric part 31a that is located at running shaft 31 bottoms, and outer circumferential face contacts with the inwall of cylinder 35, and by the rotation of eccentric part 31a revolve round the sun and spinning motion roll the ring 36; Be arranged on the cylinder 35, and roll ring 36 outer circumferential face sliding contact, can be zone of high pressure and low pressure area with the internal separation of cylinder 35, and can be along the blade 37 that radially carries out straight reciprocating motion of cylinder 35.When connecting power supply, interaction lower rotor part 22 and running shaft 31 at stator 21 and rotor 22 begin rotation, and under the drive of the eccentric part 31a that is located at running shaft 31 bottoms, also begin rotation with the blade 37 contacted rings 36 that roll, the low-temp low-pressure refrigerant that sucks by liquid container 40 can be compressed into the High Temperature High Pressure refrigerant when rolling ring 36 rotations.Fig. 2 is the rotary compressor press part enlarged view among Fig. 1.As shown in Figure 2, during running shaft 31 rotations, its outer circumferential face is supported by inner side surface 32a, the 33a of upper bearing 32 and lower bearing 33, and bear: then support with the lower end surface 32b of cylinder 35 contacted upper bearings 32 and the upper-end surface 33b of lower bearing 33, and bear the load of effect vertically by upper-end surface 31b and the lower end surface 31c of eccentric part 31a along the load of axle Vertical direction effect.But, in the rotary compressor of this prior art, because the difficulty of processing of the upper-end surface 31b of eccentric part 31a and lower end surface 31c is bigger, especially when bearing bigger load, if the surface ratio of its lower end surface 31c is more coarse, noise will occurs and reach problems such as power consumption rising greatly.

Summary of the invention

In order to address the above problem, the object of the present invention is to provide a kind of running shaft fixing device of the simple in structure and rotary compressor that noise is low.

In order to achieve the above object, the running shaft fixing device of rotary compressor provided by the invention be arranged on the eccentric part that utilizes upper bearing and lower bearing to come supporting rotating shaft and roll on the eccentric part that ring is pressed into rotor and roll that ring can rotate in cylinder and rotary compressor that refrigerant is compressed in, it is to come support rotor by the thrust surface with the contacted upper bearing of rotor, and forms the first thrust bearing portion that can bear the running shaft axial load; The upper-end surface of eccentric part can be supported in the lower end surface of described upper bearing, and forms the second thrust bearing portion that can bear the running shaft axial load.

The described first thrust bearing portion comprises and is formed on rotor slip surface bottom; Contact with the upper end that is formed on upper bearing and with slip surface and can support the thrust surface of slip surface.

The running shaft fixing device of rotary compressor provided by the invention is that the thrust surface with upper bearing supports and is formed on rotor slip surface bottom, promptly bear along the load of running shaft axial action with the first thrust bearing portion and the second thrust bearing portion, so not only can reduce the relatively working area of the rotating shaft eccentric portion of difficulty of processing, but also can reduce noise, frictional force and power consumption, and can improve the compression efficiency of compressor.

Description of drawings

Be elaborated below in conjunction with the running shaft fixing device of the drawings and specific embodiments to rotary compressor of the present invention, wherein identical with prior art parts use identical symbol.

Fig. 1 is the rotary compressor forward sectional view of prior art.

Fig. 2 is the rotary compressor press part enlarged view among Fig. 1.

Fig. 3 is a rotary compressor forward sectional view of the present invention.

Fig. 4 is the rotary compressor press part enlarged view among Fig. 3.

Embodiment

As shown in Figure 3, the inside of rotary compressor provided by the invention is formed with confined space, and it comprises: the seal container 10 that is provided with suction pipe 1 and outlet pipe 2; Be located at the motor part 20 of seal container 10 inside; Be located at the inside of seal container 10, link to each other with motor part 20 and be driven by it, and the press part 130 that the refrigerant that sucks can be compressed; With link to each other and the liquid container 40 that communicates with press part 130 with the suction pipe 1 of seal container 10.Described motor part 20 comprises: the stator 21 that is located at seal container 10 inside; With the inside that is located at stator 21, and repeatedly press the rotor 22 that forms by a plurality of silicon steel plates.Described press part 130 is by constituting with lower member: be pressed into the inner peripheral surface of rotor 22, the bottom is formed with the running shaft 131 of eccentric part 131a; Be located at the inside of seal container 10, be connected by bolt 134 with lower bearing 133 with the upper bearing 132 of supporting rotating shaft 131, be provided with eccentric part 131a between upper bearing 132 and the lower bearing 133, and radially be formed with the cylinder 135 of the suction passage 135a of perforation; Inner circumferential surface contacts with the eccentric part 131a that is located at running shaft 131 bottoms, and outer circumferential face contacts with the inwall of cylinder 135, and by the rotation of eccentric part 131a revolve round the sun and spinning motion roll the ring 136; Be arranged on the cylinder 135, and roll ring 136 outer circumferential face sliding contact, can be zone of high pressure and low pressure area with the internal separation of cylinder 135, and can be along the blade 137 that radially carries out straight reciprocating motion of cylinder 135.When connecting power supply, under the interaction of stator 21 and rotor 22, rotor 22 and running shaft 131 begin rotation, and under the drive of the eccentric part 131a that is located at running shaft 131 bottoms, also begin rotation with the blade 137 contacted rings 136 that roll, the low-temp low-pressure refrigerant that sucks by liquid container 40 can be compressed into the High Temperature High Pressure refrigerant when rolling ring 136 rotations.As shown in Figure 4, during running shaft 131 rotations, its outer circumferential face is supported by inner side surface 132a, the 133a of upper bearing 132 and lower bearing 133, and bears along the load of axle Vertical direction effect.Support by the upper-end surface 131b of eccentric part 131a with the lower end surface 132b of cylinder 135 contacted upper bearings 132 and form the second thrust bearing portion 136 '; The slip surface 23a that rotor 22 forms is bottom supported by the thrust surface 132c of upper bearing 132 and forms 137, the first thrust bearing portions 137 of the first thrust bearing portion and the second thrust bearing portion 136 ' can both bear along the load of running shaft 131 axial action.And the lower end surface 131c of eccentric part 131a does not contact with the upper-end surface 133b of lower bearing 133.When running shaft 131 rotations, the axial load that it produced is born by the first thrust bearing portion 137 and the second thrust bearing portion 136 ', this moment, the lower end surface 132b and the thrust surface 132c of upper bearing 132 need be through precision machining to improve its surface roughness, and rotor 22 is repeatedly pressed by silicon steel plate and is formed, because the surface roughness of this material itself is good, so the slip surface 23a on it need not follow-up processing.

Claims (2)

1. the running shaft fixing device of a rotary compressor, be arranged on the eccentric part that utilizes upper bearing and lower bearing to come supporting rotating shaft and roll on the eccentric part that ring is pressed into rotor and roll that ring can rotate in cylinder and rotary compressor that refrigerant is compressed in, the running shaft fixing device of described rotary compressor is to use the thrust surface (132c) with the contacted upper bearing of rotor (22) (132) to come support rotor (22), and forms the first thrust bearing portion (137) that can bear running shaft (131) axial load; It is characterized in that: the upper-end surface (131b) of eccentric part (131a) can be supported in the lower end surface (132b) of described upper bearing (132), and forms the second thrust bearing portion (136 ') that can bear running shaft (131) axial load.

2. the running shaft fixing device of rotary compressor according to claim 1 is characterized in that: the described first thrust bearing portion (137) comprises and is formed on rotor (22) slip surface (23a) bottom; Contact with the upper end that is formed on upper bearing (132) and with slip surface (23a) and can support the thrust surface (132c) of slip surface (23a).

Images