CN1329214A

CN1329214A - Closed compressor

Info

Publication number: CN1329214A
Application number: CN01122185A
Authority: CN
Inventors: 鶸田晃; 二上义幸; 平野秀夫; 河原定夫
Original assignee: Matsushita Electric Industrial Co Ltd
Current assignee: Panasonic Holdings Corp
Priority date: 2000-06-15
Filing date: 2001-06-14
Publication date: 2002-01-02
Also published as: JP2001355571A; KR20010112894A; JP3562444B2

Abstract

Force applied to the crankshaft 32 is reduced by attaching a third balance weight 25 in an opposite side of a second balance weight 24. Accordingly, deflection amount of the crankshaft 32 becomes small, preventing contact of the stator 21 with the rotor 22 and damage to the upper and lower bearing parts 36 and 37 and the crankshaft 32.

Description

Hermetic type compressor

The present invention relates to a kind of hermetic type compressor that in the cooling unit of air-conditioned room or refrigerated warehouse, uses.

Fig. 4 was for had the hermetic type compressor sectional drawing of Equilibrator in the past.As shown in Figure 4, in seal container 10, dispose motor 20 and compression mechanical part 30.On seal container 10, dispose suction pipe 11 that is connected with vaporizer and the discharge tube 12 that is connected with condenser.Constitute by stator 21 and rotor 22 by the motor 20 of input electric power with the 15Hz-150Hz frequency run.Stator 21 is fixed in the seal container 10, and rotor 22 relative stator 21 are free to rotate.The metal (upper 36,37 that the apart that compression mechanical part 30 is by cylinder 31, rely on piston 34 that the eccentric part 33 of bent axle 32 rotates cylinder 31 in, form cylinder 31 and piston 34 becomes the both ends of the surface of guider 35, countercylinder 31 and the piston 34 in compression volume and suction space to carry out obturation constitutes.The driving force that motor 20 produces is transmitted by the eccentric part 33 of bent axle 32.For the piston 34 that makes compression mechanical part 30 and eccentric part 33 rotate centrifugal force and the equalising torque that produces, staggering 180 ° in the upper and lower end parts of rotor 22 is installed with first equilibrium block 23 and second equilibrium block 24.

But according to above-mentioned structure in the past, first equilibrium block, second equilibrium block do not consider that the centrifugal force that causes because of deflection of crankshaft becomes big.Because along with the motor revolution rises, away from second equilibrium block action that the compression mechanical part of rotor is installed, the deflection of crankshaft quantitative change that centrifugal force is caused is big, the result produces that stator contacts with rotor or metal (upper and the impaired problem of bent axle.

Known to as described in the fair 2-33876 communique of spy, can prevent by second mass of balance block is diminished that stator from contacting with rotor or metal (upper and bent axle impaired.But in this case, the effect of rushing in coiler from the oil of discharging between stator and rotor also diminishes, and has the oil mass from discharge tube to become many problems.

The objective of the invention is to reduce the deflection of crankshaft amount, prevent damage and reduce the oil discharge.Hermetic type compressor of the present invention, take in the motor that constitutes by stator and rotor and by the compressor driven structure portion of crankshaft eccentric portion that is installed on this rotor, on the two ends of rotor nearly compression mechanical part side have relative configuration with the crankshaft eccentric direction first equilibrium block, have with second equilibrium block of crankshaft eccentric direction homonymy configuration, than relative the 3rd little equilibrium block of the second equilibrium block compression mechanical part quality that disposes of eccentric direction away from compression mechanical part away from the rotor tip of compression mechanical part side.

Fig. 1 is a hermetic type compressor sectional drawing among the embodiment of the invention 1-4;

Fig. 2 represents the plotted curve of the crankshaft end amount of bow corresponding with frequency number;

Fig. 3 is the planimetric map of the closed type rotor of the embodiment of the invention 5;

Fig. 4 had the sectional drawing of the hermetic type compressor of Equilibrator in the past.

Embodiments of the invention are described with reference to the accompanying drawings.Be marked with identical symbol with parts identical in the hermetic type compressor in the past shown in Figure 3, its explanation is omitted.

Embodiment 1

Fig. 1 is a hermetic type compressor sectional drawing in the embodiment of the invention 1.As shown in Figure 1, among this embodiment hermetic type compressor three equilibrium block 25 littler than second equilibrium block, 24 quality be installed in be inserted with bent axle 32 and with rotor 22 ends at second equilibrium block, 24 relative position places.According to this structure, the centrifugal action that the 3rd equilibrium block 25 produces is in eliminating the centrifugal force direction that causes the second bigger equilibrium block 24 to produce because of bent axle 32 bendings.That is, bent axle 32 upper ends are used as power and reduce.The result can prevent that stator from contacting with rotor or metal (upper and bent axle impaired.

In addition, because of the 3rd equilibrium block 25 is installed, the oil of discharging from stator 21 and rotor 22 gaps collides once on second equilibrium block 24, the 3rd equilibrium block 25 both sides of rotating.Subsequently, oil collides coiler 26.The oil mass of discharging from discharge tube 12 is reduced effectively.As a result, can obtain to make the effect that revolution rises and the oil discharge reduces of motor 20.

Embodiment 2

This embodiment is that one constitutes second equilibrium block 24 and the 3rd equilibrium block 25 in embodiment's 1 described hermetic type compressor.

In this embodiment, be that the relative 180 position one of spending are installed second equilibrium block 24 and the 3rd equilibrium block 25 on the plate of the garden of centre punching.The garden shape plate that second equilibrium block 24 and the 3rd equilibrium block 25 are installed is fixed on the end face of rotor 22 of discharge tube 12 sides.

Second equilibrium block 24 to the three equilibrium blocks, the 25 heavy metals or resin are made.

According to said structure, the oil of discharging from stator 21 and rotor 22 gaps collides once second equilibrium block 24, the 3rd equilibrium block 25 of the rotation that one constitutes.And, collide coiler 26.The result makes from discharge tube 12 effect that oil mass reduces of coming out more obvious.

Also but second equilibrium block of installing on the horizontal processing garden shape plate 24 and the upper-end surface of the 3rd equilibrium block 25 can obtain same effect.

Embodiment 3

The hermetic type compressor of present embodiment 3 is identical with embodiment 1 formation.

In this embodiment, diminish for making metal (upper 36,37 upper activation forces, the quality mln of first equilibrium block 23 is set at and satisfies formula 1 substantially.

Mln=m10-m3r3/r1 (formula 1)

Here, m10 is the quality of first equilibrium block 23 among the embodiment 1; M3 is the quality of the 3rd equilibrium block 25; R1 is the radius length from center to the first equilibrium block 23 centers of gravity of bent axle 32; R1 is the radius length from center to the three equilibrium blocks, 25 centers of gravity of bent axle 32.

According to this structure, reduce seal container 10 vibration in the horizontal direction in the time of to suppress low-speed running effectively owing to can make with metal (upper 36,37 being used as power of substantially horizontal with the identical frequency number change of the rotational frequency number of compression mechanical part 30.

Embodiment 4

The hermetic type compressor of present embodiment 4 is identical with embodiment 1 formation.

In this embodiment, being set at metal (upper 36,37 upper activation force squares diminishes and makes the quality mln of first equilibrium block 23 satisfy formula 2 substantially.

Mln=m10-m3r3/r113/11 (formula 2)

Here, m10 is the quality of first equilibrium block 23 among the embodiment 1; M3 is the quality of the 3rd equilibrium block 25; R1 is the radius length from center to the first equilibrium block 23 centers of gravity of bent axle 32; R1 is the radius length from center to the three equilibrium blocks, 25 centers of gravity of bent axle 32; L1 is perpendicular to the length on the radial direction from coiler 26 to first equilibrium blocks 23; R1 is the radius length from center to the three equilibrium blocks, 25 centers of gravity of bent axle 32; The 13rd, from coiler 26 to first equilibrium blocks 23 perpendicular to the length on the radial direction.

Utilize this structure, can make with metal (upper 36,37 being used as power of substantially horizontal to reduce with the identical frequency number change of the rotational frequency number of compression mechanical part 30.Because the moment of substantially horizontal is the center with metal (upper 36,37, and form the power of tending to away from compression mechanical part 30 sides of seal container 10, therefore can be by reducing this moment, the up-down vibration of seal container 10 in the time of can effectively suppressing low-speed running.

Fig. 2 is the loose spirogram of expression corresponding to crank shaft 32 upper end portions of motor 20 frequency numbers.As shown in Figure 2, clearly the loose amount of embodiment 1, embodiment 3 and embodiment's 4 hermetic type compressor all is lower than in the past embodiment.

Embodiment 5

Fig. 3 is the planimetric map of the embodiment of the invention 5 rotors.The structure of hermetic type compressor is identical with embodiment 1 except the 3rd equilibrium block 29 shown in Figure 3 in the present embodiment.

As shown in Figure 3, the 3rd equilibrium block 29 is made of weight portion 27, spring 28a, arm 28b among this embodiment.Arm 28b is installed on the end face of rotor 22 in position shown in Figure 3.The end of arm 28b is that fulcrum is installed on the arm 28b free to rotately with fulcrum 28d.Spring 28a draws arm 28c to arm 28b side.Weight portion is installed in the fulcrum 28d opposite side of spring 28a.The quality of mass ratio second equilibrium block 24 of the 3rd equilibrium block 29 is little.Spring 28a becomes big because of the revolution of rotor 22, if level of stretch is set to the state that weight portion 27 does not contact coiler 26, when the revolution of motor 20 hanged down, because of the 3rd equilibrium block 29 upper activation forces are little, centrifugal force and moment that compression mechanical part 30 is formed kept state of equilibrium.That is to say, on the metal (upper 36,37 be used as power and moment has reduced.The result can suppress seal container 10 horizontal vibrations and swing back and forth.In addition, when revolution was high, because of start centrifugal force on the 3rd equilibrium block 29 becomes big, the action force that bent axle 32 upper ends rush to reduced.The result can prevent that stator from contacting with rotor or metal (upper and bent axle impaired.

Claims

1. hermetic type compressor, taking in the motor that is made of stator and rotor reaches by the compressor driven structure portion of crankshaft eccentric portion that is installed on this rotor, it is characterized in that nearly compression mechanical part side has relative first equilibrium block that disposes with the crankshaft eccentric direction, has with second equilibrium block of the identical configuration of crankshaft eccentric direction, than the 3rd little equilibrium block of the second equilibrium block compression mechanical part quality away from the relative configuration of compression mechanical part rotor tip eccentric direction away from the compression mechanical part side on the two ends of rotor.

2. hermetic type compressor according to claim 1 is characterized in that, second equilibrium block and the 3rd equilibrium block are integrative-structures, and second equilibrium block is made than heavy metal of the 3rd equilibrium block or resin.

3. hermetic type compressor according to claim 1 is characterized in that, so that the centrifugal force that first, second and third equilibrium block produces is determined first, second and third mass of balance block with the form that the centrifugal force of compression mechanical part generation matches.

4. hermetic type compressor according to claim 1 is characterized in that, so that the centrifugal moment that first, second and third equilibrium block produces is determined first, second and third mass of balance block with the form that the centrifugal moment of compression mechanical part generation matches.

5. hermetic type compressor according to claim 1 is characterized in that, the 3rd equilibrium block is made of weight portion and the spring portion littler than the second equilibrium block quality, and is installed in crankshaft end or away from the rotor tip of compression mechanical part side.