JPH07151088A - Rotary compressor - Google Patents

Abstract

PURPOSE:To enable a simple balance to be achieved when a rotary shaft is mounted by means of a rotator by connecting the upper and lower cover bodies of the rotator to each other by means of a rivet member which is balanced with the eccentric part of the rotary shaft, in a D.C. power supply driving type rotary compressor. CONSTITUTION:A rotary compressor 1 is provided with an electrically driven element 3 in an enclosed container 2, and a compressing element 4 which is driven by power thereof. In the compressing element 4, an eccentric part 50 which is formed on a rotary shaft 5 is arranged in a cylinder 40 in which gas (refrigerant) is delivered from the outside of the enclosed container 2, and pressure of gas is raised by rotary movement of the eccentric part 50. In this case, in a D.C. power supply driving type rotator 31 which consists of a cylindrical side plate 7 and cover bodies 8 arranged on the top and bottom thereof, the upper and lower cover bodies 8 are connected to each other by a plurality of rivet member 9. In the rivet members 9, a plurality of them are used by respectively selecting arragement, disposition, and weight so as to keep balance with the eccentric part 50 of the rotary shaft 5, so that the whole balance may be achieved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary compressor used for air conditioners, freezers and refrigerators.

[0002]

2. Description of the Related Art As shown in FIG. 3, a rotary compressor 1 of this type conventionally has an electric element 3 as a drive source in a closed container 2.
And a compression element 4 that compresses with the power from the electric element 3. The electric element 3
The electric motor is composed of a stator 30 fixed to the closed container 2 and a rotor 31 arranged inside thereof, and a rotary shaft 5 extending between the electric element 3 and the compression element 4 is formed. Is attached to the rotor 31, and the rotation shaft 5 is rotated by the rotation of the rotor 31. The compression element 4 has an eccentric portion 50 formed on the rotary shaft 5 in a cylinder 40 into which gas (refrigerant) is fed from the outside of the closed container.
Is rotatably arranged, and the eccentric portion 50 is rotatably moved to increase the pressure of the gas and discharge the gas.

The rotary compressor 1 is classified into an AC power supply drive system and a DC power supply drive system. FIGS. 3 and 4 show a compressor driven by an AC power source. In the AC power source driven system, the rotor 31 of the electric element 3 has electromagnetic steel plates stacked and a rotary shaft mounting hole 32 in the center. It is formed in a shape and has a uniform mass distribution. For this reason, the balance of the rotor 31 itself is maintained, and the unbalance of the entire balance due to the mounting of the rotary shaft 5 having the eccentric portion 50 is prevented by the counter mounted on the upper end or the lower end of the rotor 31 as shown in FIG. Corrected by weight 6. For example, assuming that the center of the static balance is the upper cylinder 40 as shown in FIG. 3, the counterweight 6 is attached to the upper end of the rotor 31 and m ₁ · r ₁ · L ₁ = m ₂ · r ₂ · L ₂ . To be Further, the balance of the dynamic balance is set to be m ₁ · r ₁ · ω ² + m ₂ · r ₂ · ω ² = MRω ² . Note that M and m are masses of respective members to which arrows (indicate directions in which force is applied) in the figure are attached,
R and r indicate the distance from the center line A of the reference point of the member, and L indicates the distance from the reference line B.

[0004]

In the rotary compressor of the DC power source drive type, in contrast to the AC power source drive type one described above, the rotor of the electric element has the lids above and below the tubular side plate made of a ferrite material. Since the lid is arranged and fixed to the lid with screws, the rotor has a non-uniform mass distribution, and static imbalance occurs in the rotor itself. . For this reason, it is not possible to determine the position to balance the entire rotary shaft only after mounting the rotary shaft on the rotor, and therefore, the calibration work is performed one by one to balance the two.
Furthermore, due to the structure of this rotor in the DC power supply drive system,
Since it is difficult to attach the above-mentioned counterweight, there is a problem that the production of the rotary shaft having the rotor becomes very complicated.

In view of the above circumstances, it is an object of the present invention to make it possible to easily obtain a balance when a rotary shaft is mounted by a rotor of a DC power source drive system,
The purpose is to reduce the time and effort required for manufacturing the rotating shaft.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above problems, and provides a rotor in which lids are attached above and below a tubular side plate inwardly of a stator fixed to a closed container. The electric element is arranged to constitute an electric motor, and the electric element part for rotating the rotary shaft mounted on the rotor and the eccentric part of the rotary shaft rotated by the electric element are rotationally moved in the cylinder and fed into the cylinder. In a rotary compressor driven by a direct-current power supply, which comprises a compression element section for increasing the pressure of gas and discharging the same, the upper and lower lids of the rotor are connected by a rivet member that balances with an eccentric section of a rotary shaft. A compressor of the type is provided to solve the above-mentioned problems.

[0007]

In the present invention, attention is paid to the rivet member used as one component of the rotor in the DC power supply drive system, and the rotor is manufactured by using the rivet member set to be balanced, If a rotary shaft is attached to this, it will be balanced as a whole.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail with reference to an embodiment shown in FIGS. The present invention, as shown in FIG.
A rotor 31 of a DC power source drive system, which comprises a cylindrical side plate 7 and lids 8 arranged above and below the tubular side plate 7, uses a plurality of rivet members 9 extending between the upper and lower lids 8. The arrangement, arrangement, and weight of each of a plurality of rivet members are selected in advance so as to be balanced with the eccentric portion 50 of the shaft 5, and the upper and lower lid bodies 8 are connected by the plurality of rivet members 9. For example, when using a plurality of rivet members 9, if the center of the static balance is the upper cylinder 40 as shown in FIG. 1, when the rivet members 9 are arranged, m ₁ · r ₁ · L ₁ = m ₃ · r ₃ · L ₃ and the balance of dynamic balance is m ₁ · r ₁ · ω ² + m ₃ · r ₃ · ω ² = MRω ² . (Note that m ₃ is the mass of the member indicated by the arrow in the figure (indicating the direction in which force is applied), r ₃ is the distance from the center line A of the reference point of the member, and L ₃ is the reference line B
Shows the distance from. )

[0009]

As described above, according to the present invention,
An electric element part for arranging a rotor having upper and lower lids attached to a cylindrical side plate inside a stator fixed to a closed container to constitute an electric motor, and rotating a rotary shaft attached to the rotor. And a compression element part for rotating and moving the eccentric part of the rotating shaft rotated by the electric element part in the cylinder, and increasing the pressure of the gas sent to the cylinder and discharging it, in a DC power supply driven rotary compressor, The upper and lower lids of the rotor are connected by a rivet member that balances the eccentric portion of the rotating shaft, and the balance as a whole when coupled with the rotating shaft having the eccentric portion Since the rotor is preliminarily manufactured so as to remove the gap, it becomes extremely easy to manufacture the rotary shaft having the rotor. Furthermore, since the balance is taken into consideration by the rivet member, there is no increase in the manufacturing cost of the rotor, there is no change in the outer shape, and there is no change in the external shape. This has the excellent effect of obtaining a rotary compressor.

[Brief description of drawings]

FIG. 1 is an explanatory view showing, in cross section, one embodiment of a DC power source drive type rotary compressor according to the present invention.

FIG. 2 is an explanatory diagram showing a rotor according to an embodiment.

FIG. 3 is an explanatory view showing a cross section of a rotary compressor driven by an AC power supply.

FIG. 4 is an explanatory diagram showing a rotor in a flow power supply driving method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Rotary compressor 3 ... Electric element 30 ... Stator 31 ... Rotor 4 ... Compression element 5 ... Rotating shaft 50 ... Eccentric part 7 ... Cylindrical side plate 8 ... Lid 9 ... Riveting member

Claims (1)

[Claims] 1. An electric motor is constructed by arranging a rotor, which is provided with lids above and below a tubular side plate, inside a stator fixed to a hermetically sealed container to constitute an electric motor, and a rotary shaft mounted on the rotor. DC power supply drive type equipped with an electric element part to be rotated and an eccentric part of a rotating shaft rotated by the electric element part to be rotationally moved in a cylinder, and a compression element part to increase the pressure of gas sent to the cylinder and discharge it In the rotary compressor, the upper and lower lids of the rotor are connected by a rivet member that balances with an eccentric part of a rotary shaft.