JPH1113673A - Sealed scroll compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To ensure feed of lubricating oil by forming a part opened to a recessed part of a compressing mechanism side end part of a crank shaft of an oiling passage connected to an eccentric core bearing, higher than the position of a bottom part of the recessed part, passing from an oiling mechanism to the oiling passage in the crank shaft. SOLUTION: An auxiliary bearing 21 which is held an electric motor 2 of a crank shaft and for supporting a spindle part arranged opposed to a main spindle, is arranged and fixed to an auxiliary bearing member 24, an oiling mechanism 22 connected to an oiling passage 28 in the crank shaft is arranged, and a recessed part end surface 64 of the crank shaft is formed higher than the position of an eccentric core bearing end part 63 of an eccentric core bearing 18. A pipe may be inserted other than working formation in its depositing part. Lubricating oil supplied from a lubricating oil sump 7 to the deposited recessed part end surface 64 through an oil sucking pipe 27, an oiling mechanism 22, and the oiling passage 28, is entered into the inside of the eccentric core bearing 18 even if a clearance is generated between the eccentric core bearing end part 63 and the recessed part end surface 64, and the lubricating oil is supplied to the eccentric core bearing 18 by centrifugal force. It is thus possible to provide a compressor having a high reliability.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to improvement in lubricity of a horizontal hermetic scroll compressor.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 4, an electric motor 3 for driving a compression mechanism 2 is provided in a closed vessel 1 as shown in FIG.
Of the crankshaft 6 for driving the compression mechanism 2 on the rotor 5 of the electric motor 3 is disposed substantially horizontally. The lower part of the sealed container 1 is a lubricating oil reservoir 7.

The compression mechanism 2 includes a fixed spiral blade member 10 integrally formed with a fixed frame member 8 and a fixed spiral blade 9, and a swirling spiral blade that meshes with the fixed spiral blade 9 to form a plurality of compression working spaces 14. A rotating spiral blade member 13 formed on a rotating head plate 12 and a rotation restricting member 15 for preventing the rotating spiral blade 13 from rotating and performing only rotation are voluntarily provided. The turning drive shaft 16 provided on the opposite side is fitted into an eccentric bearing 18 movably provided in a radial direction inside a main shaft 17 formed at one end of the crankshaft 6, and the crankshaft 6 is mounted on the main shaft 17. Bearing member 20 having a main bearing 19 for supporting the bearing
Are supported by a sub-bearing 21 that supports a shaft portion of the crankshaft 6 on the opposite side of the main shaft. A hole 8 communicates with the inside of the turning head 12 and the turning drive shaft 16. The main bearing 19 and the sub-bearing 21 are fixed to the closed casing 1 by welding or the like. In addition, a casing 23 is formed on the sub-bearing 21 to provide an oil supply mechanism 22 at an end of the crankshaft 6. The casing 23 has an oil suction pipe 27
The lower end of the oil suction pipe 27 is connected to the lubricating oil reservoir 7.
I am immersed in.

On the other hand, an oil feed passage 28 is formed in the crankshaft 6, one of which is connected to the space inside the casing,
The other is connected to each sliding part of the compression mechanism 2. The lubricating oil drawn by the suction pressure on the outer periphery of the revolving head plate 12 is sucked from the oil suction pipe 27 by the communicating hole 69 formed inside the revolving head plate 12 and the revolving drive shaft 16, and the oil supply passage 28
After each sliding part is lubricated, it is discharged to the closed container 1,
The oil suction pipe 27 passes through the gap between the electric motor 3 and the closed container 1.
Return to The refrigerant sucked from the suction pipe 29 of the compressor is compressed in the compression working space 14 in the compression mechanism 2, passes through the discharge port 30, passes through the discharge pipe 31 provided in the closed container 1 near the refueling path 22, Discharged out of the compressor.

[0005]

However, the conventional compressor described above has a main shaft 17 formed at one end of the crankshaft 6.
Since the eccentric bearing 18 provided inside is formed so as to be movable in the radial direction, it is difficult to operate in any state without a gap between the eccentric bearing 18 and the concave end face 64 of the crankshaft 6. is there. If there is a gap between the concave end face 64 of the crankshaft 6 and the eccentric bearing 18, the lubricating oil supplied from the oil supply passage 28 passes under the eccentric bearing 18 and flows in the maximum radial direction, and the eccentric bearing 18 And the amount of lubricating oil supplied to the eccentric bearing 18 is reduced, so that galling and seizure easily occur with the swirling blade driving oil 16. In addition, since the lubricating oil in the lubricating oil reservoir 7 is sucked at the suction pressure and supplied to each sliding portion via the oil suction pipe 27, the casing 23, and the oil supply passage 28, transient operation of the compressor is performed. In this state, if the suction pressure increases and the amount of lubricating oil supplied decreases, the amount of lubricating oil supplied to the eccentric bearing 18 further decreases, so that galling and seizure easily occur with the turning drive shaft 16. Had.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and provides a highly reliable horizontal hermetic scroll compressor which ensures a sufficient supply of lubricating oil to an eccentric bearing in any operating state. The purpose is to do so.

[0007]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides an electric motor, a crankshaft for transmitting the rotational force of the electric motor, and a compression mechanism driven by the electric motor. The compressor is disposed so that the shaft is substantially horizontal, a lubricating oil reservoir is provided at the bottom thereof, and the compression mechanism is a scroll compression mechanism including a fixed spiral blade member orbiting spiral blade member, and an end of the crankshaft on the compression mechanism side. An eccentric bearing that can move in the radial direction is arranged in the concave part of the part,
A revolving drive shaft provided on the end plate of the revolving spiral blade member is inserted into the eccentric bearing shorter than an end of the eccentric bearing, and an oil supply mechanism is disposed on a side opposite to a compression mechanism of the crankshaft. An oil supply path is connected from the mechanism to the eccentric bearing via an oil supply path provided in the crankshaft, and an opening of the oil supply path to the recess at the end of the crankshaft on the compression mechanism side is formed at the bottom of the recess. The eccentric bearing is further opened from the end of the eccentric bearing toward the end of the turning drive shaft.

With the above configuration, even if there is a slight gap in the end surface of the eccentric bearing, the lubricating oil from the oil supply passage enters the inside of the eccentric bearing once, so that the lubrication supply to the eccentric bearing can be ensured. .

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to the first aspect of the present invention provides an electric motor, a crankshaft for transmitting the rotational force of the electric motor, and a compression mechanism driven by the electric motor inside the closed container. The compression mechanism is a scroll compression mechanism comprising a fixed spiral blade member and a revolving spiral blade member, and is provided in a recess at an end of the crankshaft on the compression mechanism side. An eccentric bearing that is movable in the radial direction is disposed, and a turning drive shaft provided on the end plate of the turning spiral blade member is inserted into the eccentric bearing shorter than an end of the eccentric bearing, and compression of the crankshaft is performed. An oil supply mechanism is arranged on the opposite side of the mechanism, and from this oil supply mechanism via an oil supply path provided in the crankshaft,
An oil supply path connected to the eccentric bearing is formed, an opening of the oil supply path to the recess at the end of the crankshaft on the compression mechanism side is raised from the bottom of the recess, and the turning drive shaft end side from the eccentric bearing end. The configuration is such that the opening is provided.

As a result, even if a gap is formed in the end face of the eccentric bearing, the lubricating oil supplied from the oil feed passage of the crankshaft is reliably supplied to the eccentric bearing without passing under the eccentric bearing. A highly reliable scroll compressor can be obtained.

According to a second aspect of the present invention, an electric motor, a crankshaft for transmitting the rotational force of the electric motor, and a compression mechanism driven by the electric motor are arranged in the closed container so that the crankshaft is substantially horizontal. A lubricating oil reservoir is provided at the bottom thereof, and the compression mechanism is a scroll compression mechanism including a fixed spiral blade member and a revolving spiral blade member, and is movable in a radial direction into a concave portion at an end of the crankshaft on the compression mechanism side. An eccentric bearing is arranged, a turning drive shaft having a concave end is provided on the end plate of the turning spiral blade member, and the turning drive shaft is inserted into the eccentric bearing, and is opposite to a compression mechanism of the crankshaft. The oil supply mechanism is disposed on the side of the crankshaft, the oil supply path is connected to the eccentric bearing through an oil supply path provided in the crankshaft from the oil supply mechanism. An opening to the recess of the end portion raised from the concave bottom portion, in which a configuration which opens into the recess of the swivel drive shaft end.

[0012] As a result, the lubricating oil supplied from the oil feed passage of the crankshaft once enters the concave portion at the end of the turning drive shaft. The scroll compressor is reliably supplied to the eccentric bearing without passing through the lower side, and a highly reliable scroll compressor can be obtained.

Further, if the pipe is inserted as in the third aspect, the lubricating oil can be supplied further to the inside. Further, by providing the groove at the end portion, the lubricating oil can be more reliably supplied to the eccentric bearing.

According to a fifth aspect of the present invention, an electric motor, a crankshaft for transmitting the rotational force of the electric motor, and a compression mechanism driven by the electric motor are arranged inside the closed container so that the crankshaft is substantially horizontal. A lubricating oil reservoir is provided at the bottom thereof, and the compression mechanism is a scroll compression mechanism including a fixed spiral blade member and a revolving spiral blade member, and is movable in a radial direction into a concave portion at an end of the crankshaft on the compression mechanism side. An eccentric bearing is arranged, a turning drive shaft having a concave end is provided on the end plate of the turning spiral blade member, and the turning drive shaft is inserted into the eccentric bearing, and is opposite to a compression mechanism of the crankshaft. A lubrication mechanism is arranged on the side of the crankshaft. The lubrication mechanism opens through an oil feed passage provided in the crankshaft, opens at a recess at the end of the crankshaft on the compression mechanism side, and deviates from the recess of the turning drive shaft. It is obtained by configuring the fuel supply route leading to the bearing.

As a result, the lubricating oil supplied from the oil feed passage of the crankshaft once enters the concave portion at the end of the turning drive shaft, and further passes through the oil supply path leading from the concave portion to the eccentric bearing. Even if a gap is formed at the end, the scroll compressor is reliably supplied to the eccentric bearing without passing under the eccentric bearing, and a highly reliable scroll compressor can be obtained.

Further, if the pipe is inserted as in claim 6, the lubricating oil can be supplied further to the inside.

[0017]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) In FIG. 1, a compression mechanism 2 and a stator 3 of an electric motor 3 are fixed inside a closed vessel 1, and a lubricating oil reservoir 7 for storing oil is provided at the bottom thereof. The electric motor 3 is composed of the stator 4 integrally mounted in the closed casing 1 and the rotor 5 having a permanent magnet 60 disposed inside the stator 4 and fixed to the crankshaft 6. It is configured.

Here, a ferrite magnet is generally used as the permanent magnet 60, but a rare earth magnet such as a Ne—Fe—B system may be used as a plastic magnet.

The compression mechanism 2 of the crankshaft 6
The eccentric bearing 18 formed in the side recess 62 so as to be movable in the radial direction and a spring 61 for normally restricting the movement thereof, and the main bearing member 20 for supporting the main shaft 17 formed on the crankshaft 6 are provided. A sub-bearing 21 for supporting a shaft portion of the crankshaft 6 opposite to the main shaft 17 across the electric motor 2 is disposed and fixed to a sub-bearing member 24. The oil supply mechanism 22 connected to the oil supply passage 28 provided in the shaft 6 is provided, and the concave end face 64 of the crankshaft 6 is raised from the eccentric bearing end 63 of the eccentric bearing 18. ing. This swelling may be achieved by inserting a pipe other than by molding. The shape of the swell may be similar to the planar shape of the concave portion 62, or may be a circle centered on the center of the crankshaft or the oil supply passage.

In the above embodiment, the eccentric bearing end 63
Since the concave end face 64 of the concave portion 62 of the crankshaft 6 including the oil feed passage 28 is formed so as to be raised, the oil suction pipe 27 from the lubricating oil reservoir 7, the oil supply mechanism 22, the oil feed passage 28
The lubricating oil sent to the raised end face 64 of the bottom face of the recess 62 of the crankshaft 6 through the eccentric bearing end 6
Even if a gap is formed between the eccentric bearing 3 and the concave end face 64 of the concave part 62 of the crankshaft 6, once it enters the eccentric bearing 18 and is supplied to the eccentric bearing 18 by centrifugal force, a highly reliable compressor is supplied. You can do it.

(Embodiment 2) In FIG.
The pipe 65 is inserted into the oil supply passage 28 opened at the concave end face 64 of the concave part 62 which constitutes the eccentric bearing 18 which is movable in the radial direction.
The end of the turning drive shaft 16 housed in the eccentric bearing 18 is formed as a recess, and the tip of the turning drive shaft 16 is opened in the turning drive shaft recess 68.

In the above embodiment, the lubricating oil reservoir 7 passes through the oil suction pipe 27, the oil supply mechanism 22, and the oil supply path 28 by the pipe 65 inserted into the oil supply path 28 from the concave end face 64 of the concave part 62 of the crankshaft 6. The lubricating oil is discharged to the turning drive shaft recess 68, and if there is a groove at the end of the turning drive shaft recess 68, lubricating oil can be supplied to the eccentric bearing 18 from the turning drive shaft 16 by centrifugal force through this groove. , A highly reliable compressor can be supplied.

(Embodiment 3) In FIG.
The pipe 65 is inserted into the oil supply passage 28 opened at the concave end face 64 of the concave part 62 which constitutes the eccentric bearing 18 which is movable in the radial direction.
The end of the turning drive shaft 16 housed in the eccentric bearing 18 is formed as a concave portion, and is opened in the turning drive shaft concave portion 68 to be further eccentric with the turning drive shaft 16. A communication hole 67 is formed so as to open in a gap of the bearing 18.

In the above embodiment, the eccentric bearing end 63
The oil ejected from the oil suction pipe 27, the oil supply mechanism 22, and the oil supply passage 28 from the lubricating oil reservoir 7 through the pipe 65 inserted into the oil supply passage 28 enters the turning drive shaft recess 68, and is inside the turning drive shaft recess 68. Since the lubricating oil can be supplied to the eccentric bearing 18 through the communication hole 67 communicating with the gap of the eccentric bearing 18, a highly reliable compressor can be provided even if a gap occurs at the end of the eccentric bearing. Can be supplied.

Further, a pipe 65 is inserted, and
By allowing the opening of the shaft to enter the turning drive shaft recess 68, the lubricating oil can be supplied more reliably. Therefore, even if a gap occurs in the eccentric bearing end 63, a highly reliable compressor can be supplied. Can be done.

[0027]

As is apparent from the above embodiment, according to the first aspect of the present invention, an electric motor and a compression mechanism driven by the electric motor are arranged inside the closed container such that their respective shaft centers are substantially horizontal. The compression mechanism is formed on a crankshaft for transmitting the rotational force of the electric motor, an eccentric bearing formed in a concave portion of the crankshaft so as to be movable in a radial direction, and the crankshaft. A main bearing member for supporting the main shaft, and a sub-bearing for supporting a shaft portion of the crankshaft opposite to the main shaft with the electric motor interposed therebetween is fixed to the sub-bearing member. A member is provided with an oil supply path connected to an oil supply path provided in the crankshaft, and the bottom surface of the crankshaft is raised from the bottom surface of the eccentric bearing. Lubrication It is possible to perform the supply of reliably,
A highly reliable horizontal hermetic scroll compressor can be provided.

As is apparent from the above embodiment, claim 2
According to the invention described in the above, an electric motor and a compression mechanism driven by this electric motor are disposed inside the closed container so that their respective axial centers are substantially horizontal, a lubricating oil reservoir is provided at the bottom, and the compression mechanism is provided. A crankshaft for transmitting the rotational force of the electric motor, an eccentric bearing formed to be movable in a radial direction in a concave portion of the crankshaft, and a main bearing member configured to support a main shaft formed on the crankshaft, A sub-bearing for supporting a shaft portion of the crank shaft opposite to the main shaft with the electric motor interposed therebetween is fixed to a sub-bearing member, and the sub-bearing member is connected to an oil supply passage provided in the crank shaft. A pipe is inserted into an oil supply path opened at the bottom of a concave portion constituting the eccentric bearing of the crankshaft, and a tip of the pipe is inserted into the eccentric bearing. Open inside By taking the configuration, can be reliably supply of lubricating oil to the eccentric bearing, it is possible to provide a highly reliable horizontal hermetic scroll compressor.

As is apparent from the above embodiment, claim 3
According to the invention described in the above, an electric motor and a compression mechanism driven by the electric motor are disposed inside the closed container so that their respective axial centers are substantially horizontal, a lubricating oil reservoir is provided at the bottom, and the compression mechanism is provided. A crankshaft for transmitting the rotational force of the electric motor, an eccentric bearing formed in a concave portion of the crankshaft so as to be movable in a radial direction, and a sub-bearing for supporting a main shaft formed on the crankshaft are disposed and fixed to a sub-bearing member. An oil supply path connected to an oil supply path provided in the crankshaft is provided on the sub-bearing member, and a pipe is inserted into an oil supply path opened on a bottom surface of a concave portion of the crankshaft. The lubricating oil supply to the eccentric bearing is ensured by adopting a configuration in which the opening is formed in the swirling spiral blade shaft accommodated in the eccentric bearing and is further opened in the gap between the swirling spiral blade shaft and the eccentric bearing. To do Can, it is possible to provide a highly reliable horizontal hermetic scroll compressor.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a horizontal hermetic scroll compressor showing one embodiment of the first invention.

FIG. 2 is a sectional view of a horizontal hermetic scroll compressor showing one embodiment of the second invention.

FIG. 3 is a sectional view of a horizontal hermetic scroll compressor showing one embodiment of the third invention.

FIG. 4 is a cross-sectional view of a horizontal hermetic scroll compressor showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Closed container 2 Compression mechanism 3 Electric motor 6 Crankshaft 7 Lubricating oil reservoir 8 Hole 10 Fixed spiral blade member 12 Revolving head plate 13 Revolving spiral blade member 16 Revolving drive shaft 17 Main shaft 18 Eccentric bearing 22 Refueling mechanism 62 Depression (crankshaft) 63 Eccentric bearing end 64 Recess end face 65 Pipe 67 Communication hole (turn drive shaft) 68 Turn drive shaft recess

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Shigeru Muramatsu 1006 Kadoma Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd.

Claims (6)

[Claims] An electric motor, a crankshaft for transmitting the rotational force of the electric motor, and a compression mechanism driven by the electric motor are arranged in the closed container so that the crankshaft is substantially horizontal. A lubricating oil reservoir is provided, the compression mechanism is a scroll compression mechanism comprising a fixed spiral blade member and a revolving spiral blade member, and a radially movable eccentric bearing is disposed in a concave portion at the end of the crankshaft on the compression mechanism side. Inserting a turning drive shaft provided on the end plate of the turning spiral blade member into the eccentric bearing shorter than an end of the eccentric bearing, and disposing an oil supply mechanism on the opposite side of the compression mechanism of the crankshaft, An oil supply path is connected from the oil supply mechanism to the eccentric bearing via an oil supply path provided in the crankshaft, and an opening of the oil supply path to a concave portion at an end of the crankshaft on the compression mechanism side is provided. A horizontally mounted hermetic scroll compressor which is raised from the bottom of the concave portion and opened from the end of the eccentric bearing to the end of the turning drive shaft. 2. An electric motor, a crankshaft for transmitting the rotating force of the electric motor, and a compression mechanism driven by the electric motor are disposed in the closed container so that the crankshaft is substantially horizontal. A lubricating oil reservoir is provided, the compression mechanism is a scroll compression mechanism including a fixed spiral blade member and a revolving spiral blade member, and a radially movable eccentric bearing is disposed in a concave portion at the end of the crankshaft on the compression mechanism side. A turning drive shaft having a concave end portion is provided on the end plate of the turning spiral blade member, the turning drive shaft is inserted into the eccentric bearing, and an oil supply mechanism is provided on the opposite side of the compression mechanism of the crankshaft. And an oil supply path connected from the oil supply mechanism to the eccentric bearing through an oil supply path provided in the crankshaft. The oil supply path extends to a recess at the end of the crankshaft on the compression mechanism side of the oil supply path. Open A horizontal hermetic scroll compressor having a mouth raised from the bottom of the recess and opened into the recess at the end of the orbiting drive shaft. 3. The horizontal hermetic scroll compressor according to claim 2, wherein a pipe is inserted into the oil feed passage of the crankshaft on the compression mechanism side. 4. The horizontal hermetic scroll compressor according to claim 2, wherein a groove is formed in an end face of the concave portion of the orbiting drive shaft. 5. An electric motor, a crankshaft for transmitting the rotational force of the electric motor, and a compression mechanism driven by the electric motor disposed inside the closed container so that the crankshaft is substantially horizontal, and a bottom portion thereof. A lubricating oil reservoir is provided, the compression mechanism is a scroll compression mechanism including a fixed spiral blade member and a revolving spiral blade member, and a radially movable eccentric bearing is disposed in a concave portion at the end of the crankshaft on the compression mechanism side. A turning drive shaft having a concave end portion is provided on the end plate of the turning spiral blade member, the turning drive shaft is inserted into the eccentric bearing, and an oil supply mechanism is provided on the opposite side of the compression mechanism of the crankshaft. The crankshaft is provided with an eccentric bearing through an oil feed passage provided in the crankshaft, and is opened to a concave portion at the end of the crankshaft on the compression mechanism side. Connected to Horizontally sealed hermetic scroll compressor with a lubricating oil supply path. 6. The horizontal hermetic scroll compressor according to claim 5, wherein a pipe is inserted into the oil feed passage of the crankshaft on the compression mechanism side, and the other end of the pipe is opened in a recess at the end of the orbiting drive shaft. .