JPS61142376A - Enclosed motor compressor - Google Patents

Abstract

PURPOSE:To reduce resilient vibration of rotary shaft to be produced under high speed by making a notch for containing the coil end of stator in main bearing for rotary shaft thereby lowering the rotor and stator thus shortening the rotary shaft. CONSTITUTION:An enclosed motor compressor is supported by a plurality of supporting springs 2 arranged with equi-interval at the lower section of case 1. The compressor section is comprised of a gas chamber having main bearing 3, a sub-bearing 4, a cylinder 5 and a roller 6 and an eccentric rotary shaft 7 where the rotation of the rotary shaft 7 will cause compression/expansion of gas in gas chamber to perform heat-exchange. Here, a notch for containing the coil end 12 of stator 11 is made in main bearing 3. When containing the coil end 12 in main bearing 3 through the notch, the rotor 8 and the stator 11 are lowered to shorten the rotary shaft 7. Consequently, resilient vibration of rotary shaft 7 to be produced under high speed can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a hermetic electric compressor used in refrigerators, air conditioners, and the like.

[Technical background of the invention and its problems]

Figure 3 shows a conventional hermetic electric compressor. The hermetic electric compressor is installed with a plurality of support springs 2 arranged at equal intervals on the circumference of the lower part of the case 1. The compressor section consists of a gas chamber consisting of a main bearing 3, a sub-bearing 4, a cylinder 5, and a roller 6, and an eccentric rotating shaft 7. As the rotating shaft 7 rotates, it compresses and expands the gas in the gas chamber, generating heat. We are doing an exchange. A rotor 8 is connected to the rotating shaft 7 and is disposed above the compressor section to drive the rotating shaft 7. In the hermetic electric compressor, the rotor 8, rotating shaft 7, and roller 6 rotate.

The bearings that support the rotating part consist of a main bearing 3 and a sub-bearing 4 that sandwich the compressor part. In a hermetic electric compressor, there is a rotor 8 with a large mass above the main bearing 3, so as the rotation speed of the rotating shaft 7 increases, the elastic vibration of the rotating shaft increases, and the rotor 8 and stator 11 contacts are a problem.

[Purpose of the invention]

An object of the present invention is to reduce the elastic vibration of the rotary shaft 7, which increases as the rotational speed of the rotary shaft 7 increases, in a hermetic electric compressor.

[Summary of the invention]

By providing a notch in the main bearing 3 to accommodate the coil end 12 of the stator 11 and fitting the coil end 12 into the main bearing 3, the stator 11 and rotor 8 are lowered and moved above the main bearing vCf. By shortening the length of the rotating shaft, the elastic vibration of the rotating shaft that occurs when the rotational speed of the rotating shaft is increased is reduced.

〔Effect of the invention〕

By housing the coil end 12 in the main bearing 3, the length of the rotating shaft above the main bearing can be shortened, and by reducing the elastic vibration of the rotating shaft during high-speed rotation, the relationship between the rotor and stator can be reduced. A small hermetic electric compressor that prevents contact and is stable at high speeds can be constructed.

[Embodiments of the invention]

Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 1 shows an embodiment of a hermetic electric compressor according to the present invention. The configuration is almost the same as that shown in Fig. g3 showing a conventional hermetic electric compressor, but in the present invention, the coil end 12 is housed in the main bearing 3 and the stator 11 is mounted in order to reduce the elastic vibration of the rotating shaft during high-speed rotation. The rotor 8 is lowered and the rotating shaft 7 is shortened.

Figure 2 shows the main bearing 3 with four IC notches.

By putting the coil ends 12 together in the notch,
The stator 11 can be brought closer to the main bearing 3. The number of notches may be any number.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing a hermetic electric compressor according to the present invention,
FIG. 2 is a perspective view showing a main bearing according to the present invention, and FIG. 3 is a sectional view showing a conventional hermetic electric compressor. 1... Case 2... Support spring 3... Main bearing 4... Sub bearing 5... Cylinder
6...Roller 7...Rotating shaft 8...Rotor 9...Lower balancer 10...Upper rose/suspension 11
... Stator 12 ... Coil end 13.
...Discharge port 14...Suction port 15...Partition plate 16...Pushing spring 17...Power terminal representative Patent attorney Noriyuki Chika (and 1 other person) Fig. 1 Fig. 2

Claims (1)

[Claims] In a hermetic electric compressor, the main part of the rotating shaft is a compressor section that sucks in gas, raises the pressure, and discharges it, a rotating shaft connected to the compressor section, and a rotor that is connected to the rotating shaft and drives the compressor section. A hermetic electric compressor characterized by having a notch in the bearing to accommodate the coil end of the stator.