JP2570509B2 - Open scroll compressor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an open scroll compressor used for compressing a refrigerant in a refrigeration system or an air conditioner.

[0002]

2. Description of the Related Art FIG. 3 is a sectional view showing the structure of a conventional open scroll compressor of this kind, which was developed by the same applicant and has already been filed in Japanese Utility Model Application No. 2-4082, and FIG. FIG. 4 is a diagram showing a cross section along line IV-IV in FIG. 1 is a fixed scroll having a suction port 1a and a discharge port 1b, 2 is an orbiting scroll that forms a pair with the fixed scroll 1, 3 is a thrust receiver that supports the orbiting scroll 2, 4 is an Oldham coupling, and 5 is an inside. A fixed scroll 1 is fixed at one end and a thrust receiver 3 and an Oldham coupling 4 are supported by a compressor body in which a casing 5a is formed.

A main shaft 6 has a large-diameter portion 6a and a small-diameter portion 6b and has one end connected to the orbiting scroll 2, and 7 is provided at a portion where the large-diameter portion 6a of the main shaft 6 passes through the compressor body 5. A main bearing for supporting the large-diameter portion 6a;
a V-belt wheel fitted to the small diameter portion 6b at the other end of the main shaft 6;
Reference numeral 10 denotes a bearing support attached to the other end of the compressor main body 5, reference numeral 11 denotes a slave bearing provided at a portion where the small diameter portion 6b of the main shaft 6 penetrates the bearing support 10, and supports the small diameter portion 6b. The cover 13 covers the recess 13 with a shaft sealing device housed in a recess 13 formed along the small diameter portion of the main shaft 6.

[0004] Reference numerals 15 and 16 denote thrust receivers provided for restricting the movement of the main shaft 6 in the thrust direction. Reference numeral 17 denotes an oil reservoir for storing lubricating oil at the bottom of the chamber 5, reference numeral 18 denotes an oil pump built in the bearing support 10, reference numeral 19 penetrates through the bearing support 10 and the main shaft 6, and each sliding portion and the oil pump 18 Oil hole communicating with the discharge side, 2
Reference numeral 0 denotes an oil hole that penetrates the bearing support 10 and communicates the oil reservoir 17 with the suction side of the oil pump 18 through the suction pipe 21.
Reference numerals 2 and 23 denote a large diameter portion 6 a of the main shaft 6 and an oil pump 18.
Each of the gears 23 is immersed in lubricating oil in an oil reservoir 17 as shown in FIG.

[0005] In the conventional open-type scroll compressor constructed as described above, first, the refrigerant gas is sucked through the suction port 1a of the fixed scroll 1 and is compressed between the fixed scroll 1 and the orbiting scroll 2; It is discharged to the outside from the discharge port 1b. On the other hand, lubrication to the sliding part
The operation is performed through an intake pipe 21, an oil hole 20, and an oil hole 19 by an oil pump 18 driven by the main shaft 6 through 2 and 23. The lubrication between the gears 22 and 23 is performed by immersing a part of the gear 23 on the oil pump 18 side in lubricating oil and stirring.

[0006]

Since the conventional open scroll compressor is constructed as described above, the gear 22 on the main shaft 6 is fitted to the large-diameter portion 6a of the main shaft 6 so that the diameter is small. And the gear ratio of the normal gears 22 and 23 is 1:
1, the diameter of the gear 23 increases, and the size of the compressor body 5 also increases. In addition, since a part of the gear 23 is immersed in lubricating oil and stirred, the diameter of the gear 23 is increased. When the value is large, the stirring speed increases, and there are problems such as an increase in stirring loss and an increase in oil rise. SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide an open scroll compressor which is small and has little stirring loss and oil rise.

[0007]

Means for Solving the Problems Claim 1 according to the present invention.
In the open scroll compressor, the gear on the main shaft is fixed to a small diameter portion of the main shaft, and the open scroll compressor according to claim 2 is configured such that the gear on the oil pump side is arranged with respect to the gear on the main shaft. It is arranged at a position shifted from the vertical direction.

[0008]

The gear on the main shaft side of the open type scroll compressor according to the present invention is reduced in diameter by being fixed to the small diameter portion of the main shaft, so that the diameter of the gear on the other oil pump side is also reduced. The pump-side gear is disposed at a position deviated from the vertical direction with respect to the main shaft-side gear, thereby reducing the vertical height dimension occupied by both gears.

[0009]

[Embodiment 1] FIG. 1 is a sectional view showing a configuration of a main part of an open scroll compressor according to Embodiment 1 of the present invention. In the figure, reference numeral 24 denotes a gear that is fitted to the stepped portion of the small diameter portion 6b and the large diameter portion 6a of the main shaft 6 so as to be sandwiched by the thrust receiver 16, and 25 is a gear fixed to the shaft of the oil pump 18 and fixed to the shaft. And a part of which is an oil sump 17
Is immersed in the lubricating oil inside.

In the open-type scroll compressor according to the first embodiment of the present invention configured as described above, the main shaft 6
Since the gear 24 on the side is fitted to the small-diameter portion 6b, the diameter can be reduced as compared with the gear 22 fitted to the conventional large-diameter portion 6a. Since the diameter can also be reduced, the height dimension occupied by both gears 24 and 25 can be significantly reduced, and the agitation speed can be reduced by reducing the diameter of gear 25 to reduce agitation loss and oil rise. Can be reduced.

Embodiment 2 FIG. FIG. 2 is a sectional view showing a configuration of a main part of an open scroll compressor according to Embodiment 2 of the present invention. In the figure, reference numeral 26 denotes a gear fitted to the large diameter portion 6a of the main shaft 6, reference numeral 27 denotes a gear fixed to the shaft of the oil pump 18 and meshing with the gear 26, viewed from a direction perpendicular to the gear 26 on the main shaft 6 side. It is disposed at a position shifted by an angle indicated by middle θ, and a part thereof is immersed in the lubricating oil in the oil reservoir 17.

In the open-type scroll compressor according to the second embodiment of the present invention, the gear 27 on the oil pump 18 side is shifted from the gear 26 on the main shaft 6 by an angle θ from the vertical direction. Because it is arranged,
Compared with the case shown in FIG. 4 in which the gear 23 corresponding to the gear 27 is disposed in the vertical direction, the height dimension occupied by the two gears 26 and 27 can be greatly reduced.

Embodiment 3 FIG. Although the gear 26 on the main shaft 6 in the second embodiment is fixed to the large diameter portion 6a of the main shaft 6, the gear 26 is fixed to the small diameter portion of the main shaft 6 like the gear 24 in the first embodiment. If the gears are fixed to the small diameter portion of the main shaft and the gears on the oil pump side are arranged at positions shifted from the vertical direction with respect to the gears on the main shaft side, the miniaturization can be achieved as in the first and second embodiments. Further promotion is possible.

[0014]

As described above, according to the first aspect of the present invention, the gear on the main shaft side is fixed to the small diameter portion of the main shaft, so that it is possible to reduce the agitation loss and oil rise with a small size. In addition, according to the second aspect, the gears on the oil pump side are disposed at positions shifted from the vertical direction with respect to the gears on the main shaft side. Can be demonstrated.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a configuration of a main part of an open scroll compressor according to a first embodiment of the present invention.

FIG. 2 is a sectional view showing a configuration of a main part of an open scroll compressor according to a second embodiment of the present invention.

FIG. 3 is a cross-sectional view showing a configuration of a conventional open scroll compressor.

FIG. 4 is a view showing a section taken along line IV-IV in FIG. 3;

[Explanation of symbols]

 6 Main shaft 6a Large diameter portion 6b Small diameter portion 10 Bearing support 18 Oil pump 24, 26 Gear on main shaft 25, 27 Gear on oil pump

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Takashi Ishigaki 6-66, Tehira, Wakayama-shi Mitsubishi Electric Corporation Wakayama Works (72) Inventor Yasuyuki Suzuki 6-66, Tehira, Wakayama-shi Mitsubishi Electric Wakayama Manufacturing Co., Ltd. (56) References Hikaru 2-4082 (JP, U)

Claims (2)

(57) [Claims] 1. A main shaft comprising a large-diameter portion and a small-diameter portion and arranged horizontally for driving a compression portion, a bearing support for supporting the small-diameter portion of the main shaft and incorporating an oil pump, and the main shaft. An oil sump having an oil surface parallel to
The shaft and the oil pump are fixed to each other and engaged with each other.
It is provided with a gear, in an open type scroll compressor which is adapted to drive the oil pump via the gear Ri by the rotation of the spindle and fixed the spindle side of the gear to the small diameter portion of the spindle And the gear on the oil pump side
An open scroll compressor characterized in that a part of the scroll compressor is immersed in oil in an oil reservoir . 2. A horizontal arrangement for driving a compression unit.
A main shaft , a bearing support for supporting the main shaft and incorporating an oil pump, and an oil surface parallel to the main shaft.
The oil reservoir, the main shaft and the oil pump
And a gear meshed with each other .
In the open scroll compressor wherein the oil pump is driven via the gear, the oil pump-side gear is disposed at a position shifted from the vertical direction with respect to the main shaft-side gear , and the oil pump is One of the side gears
An open scroll compressor characterized in that a part is immersed in oil in an oil reservoir .