KR100756445B1 - Oil Pumping apparatus for hermetic compressor - Google Patents

Abstract

The present invention relates to an oil pumping apparatus using viscosity of oil. According to the present invention, the crankshaft (30) is provided at its lower end portion with a feed jacket (40) being press fitted thereinto and rotated integrally, and a guide hole (45) is fitted to the lower end portion of the feed jacket (40). A suction member (50) is provided inside the supplying member (40) so as to have a predetermined clearance from the inner surface of the supplying member (40). To this end, the upper end of the support spring 60 is inserted and supported in the support space 54 formed at the lower portion of the above-mentioned wicking member 50. The support spring 60 passes through a guide pipe 46 formed at the center of the guide hole 45 and has a lower end connected to the support plate 62. A magnet 64 is provided on the lower surface of the support plate 62 to be attached to the bottom surface of the closed plate 20 of the support plate 62 by a magnetic force. According to the present invention having such a configuration, the operation reliability of the oil pumping device is increased, and the assembly workability is improved.

Compressor, oil pumping, viscosity

Description

Technical Field [0001] The present invention relates to an oil pumping apparatus for a hermetic compressor,

1 is a sectional view showing a configuration of an oil pumping device of a hermetic compressor according to a related art.

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a hermetic compressor.

3 is a plan view showing the configuration of a guide hole constituting an embodiment of the present invention.

Description of the Related Art [0002]

1: sealed container 3: stator

5: Rotor 7: Crankshaft

8: Oil flow path 9:

11: wicking member 13: U-shaped bracket

14, 14 ': Side arm 15: Oil

20: airtight container 21: oil

30: crankshaft 32: oil passage

40: water jacket 42: through hole

45: guide hole 46: guide tube                 

50: wicking member 52: helical channel

54: support space 60: support spring

62: Support plate 64: Magnet

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a hermetic compressor, and more particularly, to an oil pumping device for a hermetic compressor that supplies oil to a heat generating portion and a sliding portion of a hermetic compressor to perform heat dissipation and lubrication.

In a hermetic compressor, oil for heat dissipation or lubrication must be circulated in the internal heat generating portion and the sliding portion. For this purpose, an oil pumping device is used. The oil pumping device is largely divided into using the centrifugal force by the rotation of the crankshaft and utilizing the viscous force of the oil.

Fig. 1 is a cross-sectional view showing the structure of a conventional oil pumping apparatus using the viscosity of oil. As shown in the figure, a closed space is formed inside the closed container 1. The closed container (1) is generally composed of an upper container and a lower container, and forms a closed space therein.

The inside of the closed container 1 is provided with a compression mechanism for compressing the working fluid and a motor part for providing a driving force for driving the compression mechanism part to be supported by a frame (not shown). The frame is installed in the interior of the closed container (1). The compression mechanism is configured to linearly reciprocate the piston in the compression chamber by the driving force of the motor unit, and the working fluid is compressed into and out of the compression chamber through the valve assembly.

A stator 3 is installed inside the closed container 1 and a rotor 5 that is rotated by electromagnetic interaction with the stator 3 is rotatably supported on the frame. do. At the lower end of the stator 3, a shroud 4 for supporting a U-shaped bracket 13 to be described below is installed.

 A crankshaft (7) is provided through the center of the rotor (5). The crankshaft (7) is connected to the piston of the compression mechanism section at its upper end to transmit the power generated in the motor section. The rotational force of the crankshaft 7 is converted into a linear reciprocating motion of the piston and is transmitted.

Meanwhile, the oil 15, which discharges heat from the heat generating part in the compressor and serves as a lubrication part in the sliding part, is stored in the lower part of the closed container 1. The oil 15 flows into the heat generating part and the sliding part An oil passage 8 penetrating the inside of the crankshaft 7 is formed. The oil passage 8 is formed up to the upper portion of the crankshaft 7 to transfer the oil 15 to the inner upper portion of the hermetically sealed container 1.

A configuration for transmitting the oil 15 to the oil passage 8 in the crankshaft 7 is provided at the lower end of the crankshaft 7. That is, the lower end of the crankshaft 7 is provided with the oil-supplying portion 9. The water jet 9 is formed in a cylindrical shape, and its interior is vertically penetrated. The upper end of the oil mist 9 is press-fitted into the lower end of the crankshaft 7, and the lower end thereof is locked in the oil 15.

In addition, a wicking member (11) is provided inside the water jet (9). The wicking member 11 has a spiral groove formed along the outer peripheral surface thereof to guide the oil 15. Such an idler member 11 is relatively stopped in the oil supply opening 9 which is supported in the oil supply opening 9 by the U-shaped bracket 13 and is rotated integrally with the crankshaft 7.

The U-shaped bracket 13 has a predetermined elasticity. The U-shaped bracket 13 is connected at its center to the wand 11 to support the wand 11, and the side arms 14, 14 'Are hooked on the shroud 4 and supported. In the figure, reference numeral 16 denotes a mounting plate for fixing the compressor to a specific position.

Hereinafter, operation of the conventional pumping apparatus of the hermetic compressor having the above-described configuration will be described.

When the compressor is driven, a working fluid to be compressed is supplied to the compression mechanism section. And the motor is driven to compress the working fluid in the compression chamber. That is, the rotor 5 is rotated by electromagnetic interaction between the stator 3 and the rotor 5, and the crankshaft 7, which is press-fitted into the rotor 5, So that the compression force is transmitted to the compression mechanism.

On the other hand, the oil 15 is picked up by the rotation of the crankshaft 7 as described above. That is, the oil supplypipe 9 whose lower end portion is immersed in the oil 15 is rotated together with the crankshaft 7. At this time, the suction member (11) is relatively stopped inside the water supply port (9). This is because the arm member 11 is supported by the U-shaped bracket 13 fixed to the stator 3.

Accordingly, the suction member 11 is fixed and the oil 15 is sucked along the spiral groove formed on the outer surface of the suction member 11 by the viscous force of the oil 15 while the supply member 9 is rotated, And is transferred to the oil passage 8. The oil 15 transferred to the oil passage 8 is sucked up to the upper portion of the crankshaft 7 and transferred to the respective sliding portions and the heat generating portion to perform lubrication and heat dissipation.

However, the above-described conventional techniques have the following problems.

In other words, when the U-shaped bracket 13 having elasticity is used, the clearance between the suction member 11 and the oil piece 9 provided inside the oil supply hole 9 is not accurately set, There is a problem that the wiping of the oil 15 is not smoothly performed. This is because the side arms 14 and 14 'provided at both ends of the U-shaped bracket 13 are relatively long.

Since the suction member 11 is fixed relative to the supplying member 9, the suction member 11 and the supplying member 9 can not be formed as a single assembly. That is, the oil mist 9 is first press-fitted into the lower end of the crankshaft 7, the wicking member 11 connected to the U-shaped bracket 13 is inserted into the oil mist 9, Since the U-shaped bracket 13 is fixed to the shroud 4, the assembling work is inconvenient.

It is therefore an object of the present invention to solve the problems of the prior art as described above, and to provide smooth supply of oil for heat dissipation and lubrication when the compressor is driven.

Another object of the present invention is to improve assembling workability of the oil pumping device.

According to an aspect of the present invention, there is provided a crankshaft comprising: a crankshaft; a crankshaft; a crankshaft; a crankshaft; a crankshaft rotatably connected to the crankshaft; A suction member which is provided in the through hole so as to have a predetermined gap with the inner surface and which is installed so as to be relatively stationary with respect to the oil supply port so that the oil is sucked by the viscous force through the gap; And a support portion which is provided by a magnetic force of the magnet and which causes the suction member to be positioned in the interior of the supplying member with an elastic force.

The supporting part includes a supporting plate having the magnet on the lower surface and attached to the bottom surface of the closed container by the magnetic force of the magnet, and a supporting spring fixed on the supporting plate and having an upper end supporting the supporting member with elasticity .

A guide hole is provided at a lower end of the supply tube. The guide hole includes a frame mounted on the supply tube, and a guide tube connected to the frame by a connection arm and guiding a leftward and rightward flow of the support spring.

According to the oil pumping apparatus of the hermetic compressor of the present invention having such a structure, the supply of oil for lubricating and heat radiation is smoothly performed, and the assembly workability of the oil pumping apparatus is improved.                     

Hereinafter, preferred embodiments of the oil pumping device of the hermetic compressor according to the present invention will be described in detail with reference to the accompanying drawings.

2 and 3, the sealed container 20 constitutes the appearance of the compressor. The hermetically sealed container 20 generally comprises an upper container and a lower container, and various components constituting the compressor are provided therein. That is, various parts constituting a compression mechanism for compressing the working fluid by the power of the motor part and a motor part for providing power for driving the compressor.

The crankshaft 30 is integrally formed with the rotor of the motor unit and transmits power to the compression mechanism while being rotated. An oil passage 32 is formed in the crankshaft 30. The oil passage 32 sucks up the oil 21 provided in the lower portion of the hermetically sealed container 20 to heat and lubricate the compression mechanism and the motor unit. At the lower end of the crankshaft 30, there is formed a press-in portion 34 into which the emergency stop 40 to be described below is press-fitted.

Now, a configuration for pumping the oil 21 to the oil passage 32 will be described. The crankshaft (30) is provided at its lower end with pressurized oil inlets (40). A through hole (42) is formed in the upper part of the supply jacket (40). Accordingly, the oil-supplying lid 40 rotates integrally with the crankshaft 30. As a result,

A guide hole 45 is formed in the lower end of the water-supplying cap 40. 3, an annular frame 45 'which is press-fitted into the outer circumferential surface of the oil supply cap 40 is provided, and on the inner side of the frame 45' A guide tube 46 is formed at the center. The guide tube 46 is supported by a connection arm 46 'extending to both sides and connected to the frame 45'. The guide tube 46 prevents the support spring 60, which will be described later, from moving left and right.

A suction member (50) is positioned inside the supplying member (40). The outer circumferential surface of the wicking member (50) is spaced apart from the inner circumferential surface of the supplying member (40) by a predetermined distance. A helical flow passage 52, which is a path through which the oil 21 is guided along the outer circumferential surface of the above-mentioned wicking member 50, is formed. The helical flow path 52 is formed in a spiral shape along the outer circumferential surface.

A support space 54 in which the support spring 60, which will be described later, is disposed is formed in the lower portion of the interior of the wicking member 50. [ A fixing jaw (not shown) is formed on the inner upper portion of the support space 54 to prevent the jaw member 50 from rotating with respect to the support spring 60.

The lower end of the supporting spring 60 is fixed to the bottom surface of the closed container 20 by a supporting spring 60 inserted into the supporting space 54, (62). The support spring 60 supports the suction member 50 with a predetermined elastic force so that the suction member 50 can closely contact the inner surface of the supply member 40 to maintain a predetermined clearance. The support springs (60) are positioned above and below the guide tube (46).

A magnet 64 is provided on the lower surface of the support plate 62. Therefore, the support plate 62 is attached to the bottom of the closed container 20 by the magnetic force of the magnet 64.

Hereinafter, the operation of the oil pumping device of the hermetic compressor according to the present invention will be described.

First, the oil pumping device of the present invention is assembled. The oil supply cap (40) is press-fitted into the crankshaft (30). At this time, the suction member 50, the guide member 45, the support spring 60, and the support plate 62 may be integrally assembled to the supply line 40.

A supporting spring 60 is provided through the guide pipe 46 of the guide hole 45 provided at the lower end of the water supply pipe 40. The support spring 60 is installed in the water supply pipe 40, Is inserted and fixed in the support space (54) of the wicking member (50). A support plate 62 is installed at the lower end of the support spring 60.

In this state, when the assembly including the crankshaft 30 having the oil pumping device is seated in the closed container 20, the support plate 62 is moved by the magnetic force of the magnet 64 to the closed container 20). In this state, the suction member (50) is positioned with a predetermined gap from the inner surface of the supplying member (40).

The operation of the assembled oil pumping apparatus of the present invention will be described. When the compressor is driven, the crankshaft (30) is rotated by the rotation of the motor portion to compress the working fluid in the compression mechanism, and the oil (21) is lifted up through the oil passage (32) do.                     

That is, since the swash plate 40 is integrally rotated with the crankshaft 30 and the suction member 50 is installed in a state of being stopped in the through hole 42 of the swash plate 40, The oil 21 is taken up along the helical flow passage 52 of the member 50. [

The oil 21 sucked along the spiral flow path 52 escapes from the oil supply pipe 40 and continues to rise along the oil flow path 32 of the crankshaft 30 and is transmitted to the heat generating portion and the sliding portion So that heat radiation and lubrication are performed.

The suction member 50 provided in the through hole 42 of the supplying member 40 is supported by the elastic force of the supporting spring 60 so that the gap between the supplying member 50 and the inner surface of the supplying member 40 is maintained constant do. Therefore, particularly, the oil supply at the initial stage of driving is more accurately performed. Also, even if the compressor body flows, the support spring 60 is resiliently deformed to absorb the shock transmitted to the crankshaft 30, so that the mounting state of the oil-supply hose 40 provided on the crankshaft 30 is not changed.

The guide tube 46 of the guide hole 45 serves to guide the support spring 60 to prevent excessive lateral movement of the support spring 60. The connection arm 46 ' To prevent excessive sagging.

The oil pumping device according to the present invention as described above is such that the suction member is supported by the elastic force of the support spring in the oil supply sleeve so that the assembled state between the oil supply member and the suction member can always be maintained accurately, do.

And the whole oil pumping device can be provided in the main assembly line in a single assembled state, thereby improving the operability of assembling work.

Claims (3)

An oil supply hole provided at a lower end of the crankshaft and integrally rotated with the crankshaft, A suction member which is provided in the through hole so as to have a predetermined gap between itself and the inner surface of the supplying member and is relatively stationary with respect to the supplying member to allow the oil to be absorbed by the viscous force through the space, And a support portion provided on the bottom surface of the hermetically sealed container by a magnetic force of the magnet and adapted to place the suction member in the interior of the supply hose with elastic force. [2] The apparatus of claim 1, wherein the support comprises: a support plate having the magnet on a lower surface thereof and attached to a bottom surface of the closed container by a magnetic force of the magnet; And a support spring fixed on the support plate and having an upper end elastically supporting the pick-up member. [3] The apparatus of claim 2, wherein a guide hole is provided at a lower end of the oil-supplying tube, and the guide hole includes a frame mounted on the oil-supplying tube and a guide tube connected to the frame and the connection arm to guide the left- And an oil pump for supplying oil to the compressor.

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