CN1766341A

CN1766341A - Eccentric bushing with oil discharge function for vortex compressor

Info

Publication number: CN1766341A
Application number: CN 200410072395
Authority: CN
Inventors: 赵洋熙; 刘东原
Original assignee: LG Electronics Tianjin Appliances Co Ltd
Current assignee: LG Electronics Tianjin Appliances Co Ltd
Priority date: 2004-10-27
Filing date: 2004-10-27
Publication date: 2006-05-03

Abstract

The invention discloses an eccentric liner of vortex-type compressor with oil drainage function, which is characterized by the following: the eccentric liner is plugged between the boss part of rotary vortex disk and crank pin of crank shaft, which revolves the rotary vortex disk; the integral drainage part is set on the eccentric liner, which discharges the oil of eccentric liner through the oil path on the crank shaft; the drainage hole is pierced the vertical upper and bottom between the outer peripheral face of eccentric liner and inner peripheral face of crank pin to discharge oil. The device minimizes the block of oil path, which improves the compressor property.

Description

Eccentric bush with scroll compressor of oil discharge function

Technical field

The invention relates to the eccentric bush of scroll compressor with oil discharge function, particularly a kind of along the integrally formed discharge portion of eccentric bush, upwards discharge the eccentric bush of supplying with the scroll compressor with oil discharge function of oil by crankshaft to oil circuit smoothly.

Background technique

Generally, scroll compressor as shown in Figure 1, the mainframe 2 and the auxiliary framework 3 that comprise the inboard upper and lower part setting of shell 1, between mainframe 2 and auxiliary framework 3, be pressed into the inside of shell 1 by stator 4, the inside of stator 4 is provided with the power supply rotor rotated 5 by input, the central part of rotor 5 inserts to be fixed with the vertical crankshaft 6 of 5 rotations of rotor and constitutes, and the upper and lower part of crankshaft 6 is rotatably being supported by mainframe 2 and auxiliary framework 3.

And, the upper-end surface of mainframe 2 is provided with lower side and crankshaft 6 is formed with the rotation scrollwork 7a of involute shape in conjunction with, upper side rotation whirlpool dish 7, the upper side of rotation whirlpool dish 7 is fixed on the inside of shell 1 by the fixed eddy plate 8 that has and rotate the fixed scroll 8a of scrollwork 7a correspondence, and dish 7 rotations by crankshaft 6 of rotation whirlpool are rotated motion and compress and flow into the cold media air that rotates pressing chamber 22 inside that form between scrollwork 7a and the fixed scroll 8a.

In addition, the combination of crankshaft 6 and rotation whirlpool dish 7 is to be inserted among the outstanding boss part 7b that forms of lower side central part of rotation whirlpool dish 7 by the outstanding crank pin 10 that forms above the position that mind-set in the upper-end surface of crankshaft 6 is kept at a certain distance away to constitute, force to be pressed into bearing 11 in the inside of boss part 7b, the outside of crank pin 10 rotatably is combined with eccentric bush 12 in several angle.

In addition, the anti-locking mechanism cross guide ring 9 of rotation is set between mainframe 2 and the auxiliary framework 3, crankshaft 6 inner upper and lower perforations are formed with to oil circuit 6a, and rotor is upper and lower to be formed with the rotation imbalance that top counterweight 13 and bottom counterweight 14 prevent the crankshaft 6 that caused by crank pin 10 separately.

Here,

undeclared symbol

15 and 16 is suction pipe and discharge tube, and 17 and 18 is to discharge port and discharge the chamber, the 19th, and check valve, the 20th, oil, the 21st, oily propeller cavitation.

The scroll compressor of Gou Chenging is connected power supply as mentioned above, and rotor 5 is in stator 4 inner rotations, and crankshaft is rotated by rotor 5, and the rim, rotation whirlpool that is combined in crank pin 10 crankshaft 6 centers and rotates the turning radius of coiling between 7 centers in the whirlpool and is rotated motion.

In addition, the pressing chamber 22 that is formed between rotation scrollwork 7a and the fixed scroll 8a further compresses the cold media air that sucks by the minimizing volume that rotatablely moves that continues that rotates whirlpool dish 7, the cold media air of compressed like this high pressure is discharged to discharge chamber 18 by discharging port 17, discharges the cold media air of 18 inside, chamber and discharges to the outside by discharge tube 16 again.

But, aforesaid rotation whirlpool dish 7 is rotated in the process of motion, as shown in Figure 2, give oil circuit 6a by what form to crankshaft 6, rotation whirlpool dish 7 is rotated motion when reducing the bearing 11 of the boss part 7b that is combined in rotation whirlpool dish 7 and the friction between the eccentric bush 12, the stator of promising cooling lower side and rotor, supplies to the shortcoming that the top oil of eccentric bush 12 can not be discharged smoothly.

Be combined in the eccentric bush 12 of crankshaft 6 crank pins 10, when combining with crank pin for the radial direction sealing that makes press part, at seal aspect is resultful, but along with the slit between eccentric bush 12 and the bearing 11 diminishes, from above-mentioned crankshaft 6 give oil 20 that oil circuit 6a supplies with for reduce after the friction between bearing 11 and the eccentric bush 12, remaining many oily 20 relatively be deposited in its eccentric bush 12 above, the oil circuit resistance phenomenon of oil takes place.

Thus,, bring obstruction for rotatablely moving of rotation 7,, not only reduce performance but also become the reason that its eccentric bush can not rotate smoothly so reduce the compressed capability of scroll compressor because of the oil circuit obstruction of oil.

Summary of the invention

In order to solve the shortcoming of above-mentioned prior art, the objective of the invention is for along the integrally formed discharge portion of eccentric bush, discharge eccentric bush upward smoothly by the scroll compressor with oil discharge function of the oil of supplying with to oil circuit of crankshaft.

Another object of the present invention is to, can discharge the oil mass of supplying with above of eccentric bush rapidly.

Another object of the present invention is to, be regardless of according to the diameter of crankshaft and supply with oil mass and can easily discharge rapidlyer.

In order to achieve the above object, technological scheme of the present invention provides a kind of eccentric bush with scroll compressor of oil discharge function, the eccentric bush of scroll compressor is inserted between the crank pin of the boss part of rotation whirlpool dish and crankshaft, make rotation whirlpool dish be rotated motion, wherein: described eccentric bush is provided with in its one-body molded discharge portion, makes by the oil of supplying with above by the oil supply road direction eccentric bush on the crankshaft not accumulate and discharge smoothly.

Described discharge portion is from the vertical also tap hole of oil extraction that connects in the bottom surface that faces toward between the inner peripheral surface of the outer circumferential face of eccentric bush and insertion crank pin.

The cross-section area of described discharge portion is set to≤crankshaft give oil circuit cross-section area.

Described tap hole is provided with a plurality of.

Effect of the present invention is owing to be formed with discharge portion on the eccentric bush of scroll compressor, make and supply to oil above the eccentric bush except lubricated required amount to oil circuit by crankshaft, all the other remainders can be discharged smoothly, minimizing eliminating is hindered by the oil circuit that its oil that gathers causes, produce the performance that rotatablely moves, improves compressor of the slyness of rotation whirlpool dish, and the effect of the slick and sly rotation of eccentric bush is arranged.

In addition, the tap hole cross-section area that is formed on eccentric bush is littler or identical than the cross-section area of giving oil circuit that is formed on the crankshaft, so the effect that the with good grounds top oil mass that supplies to eccentric bush is discharged rapidly.

And, form a plurality of tap holes of discharging oil on the eccentric bush, so have no matter the oil mass that the sectional area of giving oil circuit that basis forms at crankshaft is supplied with can both be carried out the more rapid effect of discharge easily.

Description of drawings

Fig. 1 is the sectional arrangement drawing that general scroll compressor constitutes;

Fig. 2 is the sectional arrangement drawing of the last area oil condition of former eccentric bush;

Fig. 3 is the stereogram of eccentric bush of the present invention;

Fig. 4 is to use the part sectioned view of the state of eccentric bush of the present invention;

Fig. 5 is another embodiment's of an eccentric bush of the present invention stereogram.

Among the figure:

6: crankshaft 6a: give oil circuit

10: crank pin 11: bearing

12: eccentric bush 20: oil

120: discharge portion 1 22: tap hole

Embodiment

Be described in more detail the eccentric bush with scroll compressor of oil discharge function of the present invention below in conjunction with drawings and Examples, wherein with the aforementioned same same symbol of structure mark.

Fig. 3 is the stereogram of eccentric bush of the present invention.

As shown in the figure, be inserted between the crank pin of the boss part of rotation whirlpool dish and crankshaft, the rotation whirlpool is coiled in the eccentric bush of the scroll compressor that is rotated motion, be formed with discharge portion on the eccentric bush 12, make by what form and give oil circuit, reduce eccentric bush and be inserted in the friction of bearing of boss part and cooling bottom stator and rotor, the oil above eccentric bush 12, supplied with by crankshaft, after supplying with required amount from going up of eccentric bush 12 between eccentric bush and bearing, last oil does not gather and discharges smoothly.

Discharge portion 120 be provided with from the outer circumferential face of eccentric bush 12 and insert between the inner peripheral surface of crank pin above 12a connect fuel-displaced side by side tap hole 122 to the bottom surface of vertical lower 12B, above it, be incorporated into tap hole, and discharge smoothly from the oil of above eccentric bush, supplying with for oilhole of crankshaft.

The cross-section area of tap hole 122 is littler or identical than the cross-section area of giving oil circuit that is formed on the crankshaft, so oil, the part supplied with above the oil supply road direction eccentric bush of crankshaft supply between eccentric bush and the bearing, supply with the last oil in back do not accumulate in eccentric bush above, and discharge rapidly.

Fig. 4 is to use the part sectioned view of the state of eccentric bush of the present invention.

As shown in the figure, the oil 20 of supplying with for oil circuit 6a by crankshaft 6 supply to eccentric bush 12 above, a part that supplies to the oil above the eccentric bush 12 supply to reductions causes by rotatablely moving between eccentric bush 12 and the bearing 11 friction and, supply with the last oil 20 in back by from the outer circumferential face of eccentric bush 12 and be inserted with between the inner peripheral surface of crank pin 10 above tap hole 122 discharges that form to the bottom surface 12b of vertical lower.

Thereupon, supply to the top of eccentric bush and use between eccentric bush and the bearing lubricated required outside, the oil of last part does not gather in the above and discharges smoothly, so the oil circuit that does not take place to be caused by its oil that gathers hinders, the performance that has prevented the compressor that caused by rotatablely moving of the slyness of rotation whirlpool dish reduces, and eccentric bush rotates smoothly.

In addition, discharge the oil of above eccentric bush, supplying with the last part in back smoothly, so improve the stator of the lower side that causes by the oil of discharging and the cooling effectiveness of rotor again.

As shown in the figure, supply to oil above the above-mentioned eccentric bush because of the diameter difference of the crankshaft of its rotation, different mutually by the oil mass of supplying with to oil circuit that forms thereon, but all be not subjected to its supply oil mass what, can discharge smoothly,

The tap hole 122 that is arranged on the eccentric bush 12 is more than one a plurality of.

Thus, supply to the oil above the eccentric bush, the different mutually oil of delivery volume, do not accumulate in the top of eccentric bush and smooth discharge according to the cross-section area difference of giving oil circuit that is formed on crankshaft by a plurality of tap holes, no matter so supply to above the eccentric bush oil mass what, can both discharge smoothly.

Claims

1, a kind of eccentric bush with scroll compressor of oil discharge function, the eccentric bush of scroll compressor are inserted between the crank pin of the boss part of rotation whirlpool dish and crankshaft, make rotation whirlpool dish be rotated motion, it is characterized in that:

Described eccentric bush (12) is provided with in its one-body molded discharge portion (120), makes by the oil of supplying with above by the oil supply road direction eccentric bush on the crankshaft not accumulate and discharge smoothly.

2, the eccentric bush with scroll compressor of oil discharge function according to claim 1 is characterized in that: described discharge portion (120) is from the vertical also tap hole of oil extraction that connects in the bottom surface that faces toward between the inner peripheral surface of the outer circumferential face of eccentric bush (12) and insertion crank pin.

3, the eccentric bush with scroll compressor of oil discharge function according to claim 2 is characterized in that: the cross-section area of described discharge portion (120) is set to≤crankshaft give oil circuit cross-section area.

4, according to claim 2 or 3 described eccentric bushs with scroll compressor of oil discharge function, it is characterized in that: described tap hole (122) is provided with a plurality of.