JP3326257B2 - Rotary 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 rotary compressor used for air conditioners, freezers and refrigerators.

[0002]

2. Description of the Related Art As shown in FIG. 3, a conventional rotary compressor 1 of this type includes an electric element 3 serving as a drive source in a closed vessel 2.
And a compression element 4 for performing compression by the power from the electric element 3. The electric element 3
Is such that an electric motor is constituted by a stator 30 fixed to the closed casing 2 and a rotor 31 disposed inside the stator 30. A rotating shaft 5 extending between the electric element 3 and the compression element 4 Are mounted on the rotor 31, and the rotation of the rotor 31 causes the rotation shaft 5 to rotate. The compression element 4 is provided with an eccentric part 50 formed on the rotary shaft 5 in a cylinder 40 into which gas (refrigerant) is sent from outside the closed container.
Are disposed so as to be rotatable, and the gas is discharged at a high pressure by the rotational movement of the eccentric portion 50.

[0003] The rotary compressor 1 includes an AC power supply driving method and a DC power supply driving method. FIGS. 3 and 4 show a compressor using an AC power supply driving method. In the AC power supply driving method, the rotor 31 of the electric element 3 is formed by stacking electromagnetic steel plates and having a rotation shaft mounting hole 32 at 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 as a result of the counterbalance attached to the upper end or the lower end of the rotor 31 as shown in FIG. It is corrected by the weight 6. For example, if 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 m ₁ · r ₁ · ω ² + m ₂ · r ₂ · ω ² = MRω ² . Note that M and m are the masses of the members indicated by arrows (indicating the direction in which the force is applied) in the drawing.
R and r indicate the distance of the reference point of the member from the center line A, and L indicates the distance from the reference line B.

[0004]

In a rotary compressor driven by a DC power supply as compared with the one driven by an AC power supply described above, the rotor of the electric element has lids above and below a cylindrical side plate made of ferrite material. Since the lid is arranged and the lid is fixed by screws, the rotor has an uneven mass distribution and a static imbalance occurs in the rotor itself. . For this reason, unless the rotating shaft is mounted on the rotor, it is not possible to determine the location to balance the entire rotating shaft, so that the calibration work is performed one by one to balance.
Furthermore, due to the structure of this rotor in the DC power drive system,
Since the mounting of the above-mentioned counterweight is also difficult, there is a problem that the production of the rotating 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 balance when a rotating shaft is mounted by a rotor driven by a DC power supply.
An object of the present invention is to reduce the labor required for manufacturing a rotating shaft.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has a rotor having lids attached to the upper and lower sides of a cylindrical side plate inward of a stator fixed to a closed container. The electric motor was arranged to constitute the electric motor, and the electric element for rotating the rotating shaft mounted on the rotor, and the eccentric part of the rotating shaft rotated by the electric element were rotationally moved in the cylinder and fed into the cylinder. A direct-current power supply driven rotary compressor comprising a compression element for discharging the gas under high pressure;
The upper and lower lids of the rotor are balanced with the eccentric part of the rotating shaft.
When the rivet members are arranged by being connected by a bet member, m ₁ · r ₁ · L ₁ = m ₃ · r ₃ · L _3, and the balance of the dynamic balance is m ₁ · r ₁ · ω providing a rotary compressor, characterized in that as a ^{_{2 + m 3 · r 3 ·}} ω 2 = MRω 2
Then, the above-mentioned problem is solved. (Note that
m and M are the mass of the member, r and R are the center of the reference point of the member.
L indicates the distance from the reference line B, and L indicates the distance from the reference line B.
_{Ri, m 3, r 3, L} 3 is above the reference line _{B, m 1, r 1,} L 1
Is located below the reference line B. )

[0007]

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

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described in detail based on one embodiment shown in FIGS. The present invention, as shown in FIG.
A rotator 31 of a DC power supply type comprising a cylindrical side plate 7 and a lid 8 disposed above and below the cylindrical 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 the plurality of rivet members are preliminarily selected so as to be balanced with the eccentric portion 50 of the shaft 5, and the upper and lower lids 8 are connected by the plurality of rivet members 9. For example, when a plurality of rivet members 9 are used, 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 the dynamic balance is set to 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 an arrow (indicating the direction in which force is applied) in the drawing, 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
It shows the distance from. )

[0009]

As described above, according to the present invention,
A motor having a rotor having lids attached to the top and bottom of a cylindrical side plate is arranged inside a stator fixed to a sealed container to form a motor, and an electric element part for rotating a rotation shaft mounted on the rotor. And a DC power supply-driven rotary compressor comprising a compression element for rotating an eccentric portion of a rotating shaft rotated by the electric element in a cylinder and increasing the pressure of gas sent to the cylinder and discharging the gas. The upper and lower lids of the rotor are connected by a rivet member that balances with the eccentric portion of the rotating shaft, and the overall balance when coupled to the rotating shaft having the eccentric portion corresponds thereto. Since the rotor is manufactured in advance so that the rotor can be removed, it is extremely easy to manufacture a rotating shaft having the rotor. Furthermore, since the balance is taken into account by the rivet member, the DC power supply type rotation that reduces vibration during rotation without increasing the manufacturing cost of the rotor and causing no change in the outer shape This is an excellent effect that a type compressor can be obtained.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a cross section of an embodiment of a rotary compressor driven by a DC power supply according to the present invention.

FIG. 2 is an explanatory diagram showing a rotor according to one 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 ... Rivet member

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-5-260699 (JP, A) JP-A-1-301696 (JP, A) JP-A-1-219381 (JP, A) JP-A-2- 184232 (JP, A) JP-A-48-91608 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) F04C 23/00-29/10 H02K 1/27

Claims (1)

(57) [Claims] An electric motor is constructed by arranging a rotor having lids attached above and below a cylindrical side plate inside a stator fixed to an airtight container, and comprising a rotating shaft mounted on the rotor. A DC power supply driven type comprising: an electric element part to be rotated; and a compression element part for rotating an eccentric part of a rotating shaft rotated by the electric element part in a cylinder to increase the pressure of the gas sent to the cylinder and discharge the gas. In the rotary compressor, a rivet that balances the upper and lower lids of the rotor with an eccentric portion of a rotary shaft.
When the rivet members are connected by a member, m ₁ · r ₁ · L ₁ = m ₃ · r ₃ · L _3, and the balance of the dynamic balance is m ₁ · r ₁ · ω ² A rotary compressor characterized in that + m ₃ · r ₃ · ω ² = MRω ² . (N
Note that m and M are the mass of the member, and r and R are the reference points of the member.
L indicates the distance from the center line A, L indicates the distance from the reference line B
_{Cage, m 3, r 3, L} 3 is above the reference line _{B, m 1, r 1,} L
₁ is located below the reference line B. )