JP2000303952A - Hermetic compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce noise generated from a contact sliding part between a thrust pad and the upper end of a bearing by fitting a thrust pad of a vibration- proof iron plate having wear resistance and heat resistance on the upper end face of the bearing in a hermetic compressor having a bearing for supporting a shaft. SOLUTION: When an electric motor formed by a rotor 3 and a stator 4 is rotated, a piston 7 is reciprocated in a cylinder 6 by the rotary motion of a shaft 2, so that coolant gas is sucked and compressed in space 10. At this time, lubricating oil 12 of the lower part of the compressor is pumped by an oil feed pipe 13, and then further pumped to the upper part of the compressor by an oil feed groove of the shaft 2 to be fed to each sliding part. In this case, a thrust pad 30 of a vibration-proof iron plate having wear resistance and heat resistance is installed between the rotor 3 and the upper end part 14 of a bearing. By this arrangement, when the shaft 2 pressed in the rotor 3 is rotated along the bearing 14, noise from the contact sliding part between the thrust pad 30 and the bearing upper end part 14 can be damped.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hermetic compressor used for a refrigerator or an air conditioner.

[0002]

2. Description of the Related Art Recently, Japanese Patent Application Laid-Open No. 9-2
The thing described in 22082 gazette is known.

FIG. 3 shows a cross section of a conventional hermetic compressor, wherein 1 is a hermetic compressor. Reference numeral 2 denotes a shaft, 3 denotes a rotor, and 4 denotes a stator. The rotor 3 and the stator 4 form an electric motor as a pair. Here, a thrust receiver 15 is provided between the rotor 3 and the bearing 14. 5 is a connecting rod, 6 is a cylinder, 7 is a piston, and 8 is a piston pin. The shaft 2 press-fitted into the rotor 3 rotates along with the bearing 14 by the motor formed by the rotor 3 and the stator 4. At this time, shaft 2
The rotational movement of the shaft 2 is transmitted through the connecting rod 5 attached to the eccentric part of the cylinder and the piston pin 8 attached to the other end of the connecting rod 5 and fixed to the piston 7, and the piston 7 reciprocates in the cylinder 6. drive. Then, the space 1 formed by the piston 7 and the cylinder 6
In 0, the refrigerant gas is sucked and compressed. After the lubricating oil 12 at the lower part of the compressor is pumped up by an oil supply pipe 13 attached to the lower part of the shaft, it is further pumped up to the upper part of the compressor by a spiral oil supply groove provided on the shaft 2, and each sliding part Refueled.

Conventionally, the rotor 3 has its own weight due to its own weight.
A hollow disk-shaped thrust receiver 15 is mounted between the rotor 3 and the upper end of the bearing 14 in order to prevent the upper end of the bearing 14 from sliding directly with the upper end of the bearing 14.

[0005]

However, the above configuration has a problem that when the shaft press-fitted into the rotor rotates along with the bearing, noise is generated from the contact sliding portion between the thrust receiver and the upper end of the bearing. I was

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its object to reduce the generation of noise from a contact sliding portion between a thrust receiver and an upper end of a bearing.

[0007]

According to the present invention, there is provided a hermetic compressor having a bearing for supporting a shaft connected to an electric motor composed of a rotor and a stator. It is equipped with a thrust receiver of a damping iron plate having wear resistance and heat resistance.

[0008] This makes it possible to reduce the generation of sliding noise at the contact portion between the thrust receiver and the upper end of the bearing.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 is a hermetic compressor provided with a bearing for supporting a shaft connected to an electric motor composed of a rotor and a stator. According to the present invention, when the shaft press-fitted into the rotor rotates along with the bearing, noise generated from sliding of the contact portion between the thrust receiver and the upper end of the bearing is provided. Has the effect of reducing the occurrence of

According to a second aspect of the present invention, the refrigerant to be used is a chlorine-free HC or HFC, and the hermetic seal includes a bearing for supporting a shaft connected to an electric motor including a rotor and a stator. In the type compressor, a thrust receiver of a damping iron plate having wear resistance and heat resistance is attached to the upper end surface of the bearing. According to the present invention, after the refrigerant dissolved in the refrigerating machine oil is pumped up by the oil supply pipe, When the oil is supplied to the upper end surface of the bearing by the spiral oil supply groove on the shaft,
This has the effect of reducing the generation of noise at the time of impact when the refrigerant dissolved in the refrigerating machine oil expands in the sliding portion between the thrust receiver and the upper end of the bearing.

According to a third aspect of the present invention, a low-speed rotation at a power supply frequency of 50 Hz or less and a 60-Hz
The hermetic compressor according to claim 1 or 2, wherein the compressor operates at a high rotational speed as described above, and particularly when operating at a high rotational speed, generation of noise from sliding of the contact portion between the thrust receiver and the upper end of the bearing is reduced. It has the effect of doing.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to FIGS.
This will be described with reference to FIG. The same parts as those in the conventional example are denoted by the same reference numerals, and detailed description will be omitted.

(Embodiment 1) An embodiment of the present invention will be described below with reference to FIG. The same parts as those in the related art are denoted by the same reference numerals, and detailed description is omitted.

FIG. 1 is a sectional view of a compressor according to an embodiment of the present invention, wherein 1 is a compressor. Reference numeral 2 denotes a shaft, 3 denotes a rotor, and 4 denotes a stator. The rotor 3 and the stator 4 form an electric motor as a pair. Here, a thrust receiver 30 is provided between the rotor 3 and the bearing 14. 5 is a connecting rod, 6 is a cylinder, 7 is a piston, and 8 is a piston pin. Rotor 3 and stator 4
The shaft 2 press-fitted into the rotor 3 rotates along with the bearing 14 by the motor formed by. At this time, the connecting rod 5 attached to the eccentric part of the shaft 2
In addition, the rotational movement of the shaft 2 is transmitted through a piston pin 8 attached to the other end of the connecting rod 5 and fixed to the piston 7, and the piston 7 reciprocates in the cylinder 6. Then, the refrigerant gas is sucked and compressed in the space 10 formed by the piston 7 and the cylinder 6. After the lubricating oil 12 at the lower part of the compressor is pumped up by an oil supply pipe 13 attached to the lower part of the shaft, it is further pumped up to the upper part of the compressor by a spiral oil supply groove provided on the shaft 2, and each sliding part Refueled.

Here, FIG. 2 is a part of a perspective view of the thrust receiver 30 of the first embodiment viewed obliquely, and has a wear and heat resistance having a hollow disk shape between the rotor 3 and the bearing upper end portion 14. A thrust receiver 30 made of a vibration damping iron plate is attached, and when the shaft 2 press-fitted in the rotor 3 rotates along with the bearing 14, noise from sliding of a contact portion between the thrust receiver 30 and the upper end portion 14 of the bearing can be attenuated. .

An embodiment according to claim 2 will be described with reference to FIGS.

The refrigerant used is HC or H which does not contain chlorine.
A bearing 14 for supporting the shaft 2 connected to the electric motor composed of the rotor 3 and the stator 4, and a thrust bearing 30 of a vibration-damping iron plate having abrasion and heat resistance on the bearing upper end surface 14. The refrigerant dissolved in the refrigerating machine oil is supplied to the oil supply pipe 1
After being pumped by the shaft 3, the thrust receiver 30 and the bearing upper end 14 are provided by a helical oil supply groove formed in the shaft 2 at the time of the impact of the expansion of the refrigerant dissolved in the refrigerating machine oil when the oil is supplied to the bearing upper end surface 14. The noise from the contact portion sliding can be attenuated.

An embodiment according to claim 3 will be described with reference to FIGS.

The rotor 3 and the stator 4 are driven by an inverter.
And a bearing 14 for supporting the shaft 2 connected to the inverter motor constituted by the above. A thrust receiver 30 made of a damping iron plate having wear resistance and heat resistance is attached to the upper end portion 14 of the bearing. In operation at a low rotation speed and a high rotation speed of 60 Hz or more, particularly when operating at a high rotation speed, attenuation of noise from sliding of the contact portion between the thrust receiver 30 and the upper end portion 14 of the bearing can be obtained.

[0020]

As is apparent from the above embodiment, according to the first aspect of the present invention, a bearing for supporting a shaft connected to an electric motor composed of a rotor and a stator is provided. By installing a thrust bearing of a damping iron plate with wear and heat resistance, when the shaft press-fitted into the rotor rotates along with the bearing, the noise of the contact part sliding from the thrust bearing and the upper end of the bearing can be attenuated, As a result, the effect of reducing the noise of the compressor can be obtained.

According to the second aspect of the present invention, there is provided the hermetic compressor according to the first aspect, wherein the refrigerant to be used is HC or HFC containing no chlorine, and the upper end surface of the bearing has wear resistance and heat resistance. Even when the refrigerant of HC or HFC is melted in the refrigerating machine oil by attaching the thrust receiver of the damping iron plate, the refrigerant melted in the refrigerating machine oil when the upper end face of the bearing is refueled is cooled by the thrust receiver and upper end of the bearing. Even at the time of the impact expanding at the sliding portion, the impact noise of the sliding of the contact portion between the thrust receiver and the upper end of the bearing can be attenuated, and as a result, the effect of reducing the noise of the compressor can be obtained.

According to a third aspect of the present invention, there is provided the hermetic compressor according to the first aspect, wherein the inverter is operated at a low speed of 50 Hz or less and a high speed of 60 Hz or more by the inverter. By attaching the thrust receiver of the vibration damping iron plate with wear and heat resistance to the shaft, the shaft pressed into the rotor can be operated at a high speed of 60 Hz or more along the bearings.
The noise caused by sliding of the contact portion between the thrust receiver and the upper end of the bearing can be attenuated, and as a result, the effect of reducing the noise of the compressor can be obtained.

[Brief description of the drawings]

FIG. 1 is a sectional view of a hermetic compressor according to a first embodiment of the present invention.

FIG. 2 is a perspective view of the thrust receiver.

FIG. 3 is a sectional view of a conventional hermetic compressor.

[Explanation of symbols]

 2 Shaft 3 Rotor 4 Stator 14 Bearing 30 Thrust receiver

Claims (3)

[Claims] 1. A hermetic compressor having a bearing for supporting a shaft connected to an electric motor composed of a rotor and a stator, wherein a thrust receiver of a vibration-damping iron plate having wear resistance and heat resistance is attached to an upper end surface of the bearing. A hermetic compressor. 2. The hermetic compressor according to claim 1, wherein the refrigerant used is HC or HFC containing no chlorine. 3. A home power supply frequency of 6 by an inverter.
3. The hermetic compressor according to claim 1, wherein the compressor is operated at a frequency of 0 Hz or more or 50 Hz or less.