CN1273737C

CN1273737C - Oil supply structure of closed compressor

Info

Publication number: CN1273737C
Application number: CN 02117058
Authority: CN
Inventors: 朴圣云
Original assignee: LG Electronics Tianjin Appliances Co Ltd
Current assignee: LG Electronics Tianjin Appliances Co Ltd
Priority date: 2002-04-29
Filing date: 2002-04-29
Publication date: 2006-09-06
Anticipated expiration: 2022-04-29
Also published as: CN1455100A

Abstract

The present invention provides an oil supply structure for a closed compressor, which comprises a crankshaft, a lubrication oil passage, a lubrication oil guiding groove, an oil core, an eccentric shaft, a cylinder and a piston. In order that the lubrication oil fallen on a frame is guided to flow to a compression chamber arranged on the cylinder, the lower part of the compression chamber and the upper side of the frame are at least arranged on the same plane; the upper side of the frame is inclined to the compression chamber. In a connecting rod which can convert the rotary movement of the crankshaft into the rectilinear back and forth movement of the piston, the crankshaft connecting part of the connecting rod, and the piston connecting part has height difference; the crankshaft connecting part is higher than the piston connecting part. Oil can be sucked and upward flew apart from the eccentric shaft by following the rotation of the crankshaft; the oil fallen on the frame is guided to the cylinder to be delivered to the piston, so the oil mass delivered to the piston is large; thus, the piston can be effectively carried out for lubrication and heat dissipation.

Description

The oil supply structure of hermetic type compressor

Technical field

The present invention relates to compressor field.

Background technique

The invention relates to the invention of hermetic type compressor aspect, Fig. 1 expresses the internal structure sectional drawing of the general hermetic type compressor of prior art.As shown in the figure, upper housing 1t and lower casing 1b constitute airtight casing 1, and the inside of airtight casing 1 is provided with framework 2, is fixed with stator 3 on the framework 2, and framework 2 is supported on the inside of airtight casing 1 by spring 2S.

Crankshaft 5 is positioned at the central authorities of framework 2.Fig. 2 expresses the oil supply structure sectional drawing of the hermetic type compressor of prior art.As shown in Figure 2, crankshaft 5 is supported on the inner peripheral surface of axle sleeve 2b through hole 2h, and axle sleeve 2b prolongs formation from the mediad bottom of framework 2.

Be fixed with rotor 4 on the crankshaft 5, rotor 4 by with the electromagnetic interaction of stator 3, make crankshaft 5 rotations.

The upper end of crankshaft 5 is provided with eccentric shaft 5b, the rotating center off-centre of the relative crankshaft 5 of eccentric shaft 5b.Eccentric shaft 5b opposition side has equilibrium block 5c, and framework 2 supports crankshaft 5 rotations.The underpart of crankshaft 5 is provided with wick 5d, takes out lubricant oil L by wick 5d and transmits to oil passage 5a.

With framework 2 cylinder 6 that fused, cylinder 6 inside are provided with pressing chamber 6 '.Be provided with piston 7 in the pressing chamber 6 ', piston 7 is connected by the eccentric shaft 5b of connecting rod 8 with crankshaft 5.The front end of cylinder 6 is provided with valve 9, the refrigerant that valve 9 controls flow into and discharge in pressing chamber 6 '.Loam cake 10 is installed on the valve 9, absorbing silencer 11 and control is arranged on loam cake 10 to pressing chamber 6 ' the inner valve 9 that transmits refrigerant.

Not having the symbol 12 of explanation in the drawing is the suction pipe that refrigerant is sent to the inside of airtight casing 1, the 13rd, and with the discharge tube of the refrigerant after the compression to the discharge of the outside of compressor.

Have in the compressor of said structure, by the electromagnetic interaction between stator 3 and the rotor 4, rotor 4 is rotated, along with the rotation of rotor 4, crankshaft 5 is and then rotation together also.

The rotation of crankshaft 5 makes piston 7 carry out the straight line back and forth movement by eccentric shaft 5b and connecting rod 8, and pressing chamber 6 ' inner refrigerant is compressed.

Along with the rotation of crankshaft 5 is rotated wick 5d together, with the lubricant oil L of airtight casing 1 bottom by upwards suction of oil passage 5a.The lubricant oil L that sucts by oil passage 5a disperses to top by eccentric shaft 5b, to comprising that various slide member spares such as piston 7 and heating component spare carry out fuel feeding.Lubricant oil L to slide member and heating component supply plays lubrication and cooling action.

But the oil supply structure of the hermetic type compressor of prior art has following shortcoming.

Be sent on the piston 7 by the part of eccentric shaft 5b in the lubricant oil L that disperses in top.Though the lubricant oil L that transmits to the top of piston 7 flows downward from the top of piston 7, play the effect of lubricated and heat release, because the bottom surface of the pressing chamber 6 ' on the cylinder 6 is than the last plane height of framework 2, so the lubricant oil L that falls above framework 2 can't be lubricated and cools off piston 7.

When compressor is worked under harsh conditions,, cause the lubricated and heat radiation of piston 7 normally not carry out owing to the lubricant oil L low on fuel that transmits to piston 7.

Summary of the invention

Technical problem to be solved by this invention is, a kind of oil supply structure of hermetic type compressor is provided, and relatively improves the lubricant oil supply to piston.

In order to solve the problems of the technologies described above, the technical solution used in the present invention is: in order to guide the plug-flow of oil in being arranged on the cylinder pressing chamber that drops on above the framework, the top of the bottom of pressing chamber and framework at least will be at grade.

The described lubricant oil that disperses to the top of framework is that the inside by crankshaft is drawn into top.

Upward tilting of described framework towards pressing chamber.

Described in the connecting rod of the straight line back and forth movement that rotatablely moving of crankshaft is converted to piston, the crankshaft linking department and the piston linking department of connecting rod have height difference, and the piston linking department is lower than the height of crankshaft linking department.

The invention has the beneficial effects as follows: along with the rotation of crankshaft suct and from eccentric shaft to the oil that disperses in top, owing to being directed to cylinder, the oil of going up face that will drop on framework sends piston to, so the oil mass that transmits to piston increases relatively, more effectively piston is lubricated and dispels the heat.

Description of drawings

Fig. 1 expresses the internal structure sectional drawing of the general hermetic type compressor of prior art.

Fig. 2 expresses the oil supply structure sectional drawing of the hermetic type compressor of prior art.

Fig. 3 expresses the oil supply structure sectional drawing of hermetic type compressor of the present invention.

In the drawings

1. airtight casing 1b. lower casing 1t. upper housing

2. framework 2b. axle sleeve 2h. through hole

2s. spring 3. stators 4. rotors

5. crankshaft 5a. oil passage 5b. eccentric shaft

5c. equilibrium block 5d. wick 6. cylinders

6 '. pressing chamber 7. pistons 8. connecting rods

9. valve 10. loam cakes 11. bafflers

12. suction pipe 13. discharge tubes 20. frameworks

29. last facial 32,36,42 oil passages, 34. oily steering channels

60. connecting rod 62. crankshaft linking departments 64. piston linking departments

72. link space 74. wrist pins

Embodiment

Be described in further detail below in conjunction with the oil supply structure of the drawings and specific embodiments to hermetic type compressor of the present invention: Fig. 3 expresses the oil supply structure sectional drawing of hermetic type compressor of the present invention.As shown in the figure, the framework 20 that is arranged on the inside of airtight casing has axle sleeve 2b, and there is the through hole 2h of up/down perforation the inside of axle sleeve 2b.

One side of framework 20 has cylinder 6, and the inside of cylinder 6 is formed with pressing chamber 6 '.The upward face 29 that forms between through hole 2h and the cylinder 6 is planes, and last facial 29 pressing chambers 6 ' from through hole 2h side direction cylinder 6 tilt.

Crankshaft 5 rotatably is supported on the through hole 2h of framework 20.There is oil passage 32 inside of crankshaft 5, and the lubricant oil that is sent to wick 5d is transmitted to top.In the part of crankshaft 5 with the inner face slip of through hole 2h, lubricant oil transmits to top along the spirality lubricant oil steering channel 34 of the outside of crankshaft 5.

The upper end of crankshaft 5 is provided with eccentric shaft 5b, the open oil passage 36 in oriented top, the inside of eccentric shaft 5b.Lubricant oil disperses to top by the off-centre rotation of the eccentric shaft 5b that oil passage 36 causes along with the rotation of crankshaft 5.Wherein oil passage 36 is connected with oily steering channel 34.The upper end of crankshaft 5 is provided with equilibrium block 5c, is used to compensate the off-centring of eccentric shaft 5b.

The lower end of crankshaft 5 is provided with wick 5d, and the oil passage 42 in the wick 5d is connected with oil passage 32.Rotor 4 be pressed into or hot pressing on crankshaft 5.

Connecting rod 60 converts rotatablely moving of crankshaft 5 to the straight line back and forth movement of piston 7.One end of connecting rod 60 is useful on the crankshaft linking department 62 that links crankshaft 5, and the other end has piston linking department 64.Wherein crankshaft linking department 62 and piston linking department 64 have height difference.Piston linking department 64 is lower than crankshaft linking department 62.

In order to guide the lubricant oil that drops on above the framework 20 to flow to the piston 7 that is arranged on the pressing chamber 6 ' on the cylinder 6, the top of the bottom of pressing chamber 6 ' and framework 20 at least will be at grade.

Going up of framework 20 towards pressing chamber 6 ' inclination.

The inside of pressing chamber 6 ' is provided with piston 7.There is the space 72 of binding the rear end of piston 7, is linking 72 inside, space, by wrist pin 74 piston 7 and the piston linking department 64 of connecting rod 60 is connected.

Effect to the oil supply structure of hermetic type compressor of the present invention with said structure describes below.

Compressor drives, and crankshaft 5 is rotated, and by the connecting rod 60 that the eccentric shaft 5b with crankshaft 5 is connected, makes piston 7 carry out the straight line back and forth movement in pressing chamber 6 '.So can in pressing chamber 6 ', carry out the compression of refrigerant.

By the rotation of crankshaft 5, wick 5d is and then rotation also, and the lubricant oil of airtight casing bottom surface is aspirated up.Oil sucts to the oil passage 32 of crankshaft 5 from the oil passage 42 in the wick 5d.

Oil is lubricated this part by the slide member that steering channel 34 is sent between the inner face of crankshaft 5 and through hole 2h '.Oil continues to rise along oily steering channel 34 then, is transported to the oil passage 36 of eccentric shaft 5b inside.Disperse to top from oil passage 36.The lubricant oil that disperses to framework 20 tops is that the inside by crankshaft 5 is drawn into top.

Dispersing is scattered to the lubricant oil on top delivers to the slide member and the heating component of piston 7 grades, carries out lubricated and heat sinking function.The oil of going up face 29 that drops on framework 2 is sent to the bottom of pressing chamber 6 ' to cylinder 6 side flow.

Be sent between the inner face of the oil lubrication piston 7 of pressing chamber 6 ' bottom and pressing chamber 6 ', and the heat that produces between piston 7 and the pressing chamber 6 ' is dispelled the heat.

Claims

1. the oil supply structure of a hermetic type compressor, comprise crankshaft (5), oil passage (32,36), lubricant oil steering channel (34), wick (5d), eccentric shaft (5b), cylinder (6), piston (7), it is characterized in that: flow to the piston (7) that is arranged on the pressing chamber (6 ') on the cylinder (6) in order to guide the lubricant oil that drops on above the framework (20), the top of the bottom of pressing chamber (6 ') and framework (20) at least will be at grade.

2. according to the oil supply structure of the said hermetic type compressor of claim 1, it is characterized in that: the lubricant oil that disperses to the top of framework (20) is to be drawn into top by the inside that framework (20) supports the crankshaft (5) of rotation.

3. according to the oil supply structure of claim 1 or 2 said hermetic type compressors, it is characterized in that: the last of framework (20) tilted towards pressing chamber (6 ').

4. according to the oil supply structure of the said hermetic type compressor of claim 3, it is characterized in that: in the connecting rod (60) of the straight line back and forth movement that rotatablely moving of crankshaft (5) is converted to piston (7), the crankshaft linking department (62) and the piston linking department (64) of connecting rod (60) have height difference, and piston linking department (64) is highly lower than crankshaft linking department (62).