JP3301797B2 - Motor rotor for compressor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a rotor of a compressor motor.

[0002]

2. Description of the Related Art Generally, the prior art is disclosed in
There was one described in Japanese Patent No. 46748. The rotor described in this publication is made of a metal pipe with a rotor core and a magnetic material, and a balance weight is simultaneously attached when the rotor core is integrally formed with clamp pins. .

[0003]

In the prior art constructed as described above, the assemblability when mounting the balance weight is poor. That is, it is necessary to make the clamp pin for attaching the balance weight longer than usual, and it is necessary to use crank pins having different lengths when assembling.

[0004] In order to solve such problems, the present invention provides a rotor which is easy to assemble.

[0005]

SUMMARY OF THE INVENTION A rotor of a compressor motor according to the present invention is a compressor in which a compression element and an electric motor for driving the compression element via a rotary shaft are housed in a single closed container. The rotor of the electric motor is made by laminating multiple iron plates for the rotor
A rotor iron core press-fitted with a magnetic material and a metal oil separating disk which is provided at one end of the rotor and has at least a balancer for a compression element, are integrally mounted on a rotating shaft. A predetermined space is provided between one end of the iron core and the disk.

[0006]

The rotor of the compressor motor constructed as described above can be assembled after separately manufacturing the rotor, the balancer, and the disk for oil separation.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view of a main part of the compressor. In this figure, reference numeral 1 denotes a closed container, in which an electric motor 2 is accommodated on the upper side, and a compression element 3 rotated and driven by the electric motor 2 is accommodated on the lower side. The airtight container 1 is obtained by storing the electric motor 2 and the compression element 3 in a preliminarily divided into two parts and then sealing them by high frequency welding or the like.

The electric motor 2 comprises a stator 4 fixed to the inner wall of the closed casing 1, and a rotor 5 rotatably supported inside the stator 4 about a rotation shaft 6.
The stator 4 has a stator winding 7 for applying a rotating magnetic field to the rotor 5.
It has.

The compression element 3 includes a first rotary cylinder 9 and a second rotary cylinder 10 partitioned by an intermediate partition plate 8. Eccentric portions 11 and 12 that are driven to rotate by the rotary shaft 6 are attached to the respective cylinders 9 and 10, and the eccentric portions 11 and 12 have eccentric positions that are 180 degrees out of phase with each other.

Reference numerals 13 and 14 denote a first roller and a second roller which rotate in the cylinders 9 and 10, respectively, and rotate in the cylinders by rotation of the eccentric portions 11 and 12, respectively.

Reference numerals 15 and 16 denote a first frame and a second frame, respectively. The first frame 15 is provided between the partition 9 and the cylinder 9.
The second frame 16 similarly forms a closed compression space of the cylinder 10 between the second frame 16 and the partition plate 8. Further, the first frame 15 and the second frame 16 are provided with bearings 17 and 18 of the rotating shaft 6, respectively.

Reference numerals 19 and 20 denote discharge mufflers, which are attached so as to cover the first frame 15 and the second frame 16, respectively.

Reference numeral 21 denotes a discharge hole, which is provided in the first frame 15 and communicates the inside of the muffler 19 with the cylinder 9.
In addition, a discharge hole provided in the second frame body 16 and communicating the cylinder 10 and the inside of the muffler 20 is not shown.

Reference numeral 21 denotes a bypass pipe provided outside the sealed container 1 and communicates with the inside of the muffler 20.

Reference numeral 22 denotes a discharge pipe provided on the closed vessel 1, and reference numerals 23 and 24 denote suction pipes connected to the cylinders 9 and 10, respectively. Reference numeral 25 denotes a sealed terminal for supplying electric power to the stator winding 7 of the stator 4 from outside the sealed container 1. (The lead wire connecting the sealed terminal 25 and the stator winding 7 is not shown.) 26 is a disk-shaped disk (made of metal) for oil separation and fixed to the rotating shaft 6 (shrink fit, press fit, Or bolted). still,
This disk has a balance weight (balancer) 27
Is attached. The balance weight 27 is mounted at a position where vibration during rotation of the compression element 3 is reduced with an optimum weight.

The rotor 5 is formed by laminating a plurality of 0.5 mm thick electromagnetic steel plates (iron plates for use in rotation) stamped into a predetermined shape, and is formed along the rotor core in the axial direction. It is composed of a magnetic material (magnet, rare earth-based sintered body or alloy, rare earth-based plastic magnet, or the like) pressed into the slot, and an end face member covering both end faces of the rotor core.

These rotor cores and end face members are integrally formed by welding or caulking with clamp pins, and then shrink-fitted or press-fitted to the rotating shaft.

[0018]

The rotor of the present invention constructed as described above is provided with a disk for oil separation by providing an end face of the rotor of the electric motor and a predetermined space, so that the disk rotates at a high speed (300 to 300). (10000 revolutions / minute) to effectively perform gas-liquid separation between the refrigerant and the oil.

Also, the balance weight filter disk has a solid structure and has a low speed (about 300 revolutions / minute) to a high speed (10 rotations / minute).
2,000 revolutions / minute).

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of a compressor showing an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Closed container 2 Electric motor 3 Compression element 4 Stator iron core 5 Rotor 6 Rotating shaft 7 Stator winding 26 Disk for oil separation 27 Balance weight

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-4-43892 (JP, A) JP-A-3-95087 (JP, U) JP-A-2-56891 (JP, U) Field (Int.Cl. ⁷ , DB name) H02K 7/04 H02K 7/14 H02K 15/16 H02K 21/00 H02K 29/00

Claims (1)

(57) [Claims] 1. A compression in a single closed container element及compressor housing a motor for driving the compression element via a rotary shaft, a rotor of the motor is the product of the iron plate for multiple rotor
The rotor core with the magnetic material
A balancer arranged at the end side for at least the compression element
And a disk for separating oil made of metal is integrally attached to the rotating shaft, and a predetermined space is provided between one end of the rotor core and the disk. Child.