JPH01155087A - Oil cooling type horizontal scroll compressor - Google Patents

Abstract

PURPOSE:To make improvements in lubricating and cooling effects by installing a supply port for cooling oil recovery at the lowermost end side in and around a wound part at an outer peripheral edge of the lap of a turning scroll. CONSTITUTION:A supply port 1, recovering cooling oil at every part, is installed at the lowermost end side of a machine an and around the outer peripheral edge wound part of a lap 20 of a turning scroll 13. Oil entered in a compressor body 17 from a return pipe 7 via an oil hole 4 cools and lubricates bearings 16, 18, 19 or the like, forming an oil sump 8. Intake air is entered in a chamber 9 from a suction air port 24, and inhaled in a compression space 23 between laps 20 and 22, but it works so as to suck up oil 8 stored together with the intake air into the compression space 23 with rotation of the wound part of the lap 20 of the turning scroll 13.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an oil-cooled horizontal scroll compressor in which a fixed scroll and a receiver tank are integrally formed.

[Conventional technology]

A scroll compressor introduces air into a compression chamber formed between an orbiting scroll and a fixed scroll meshing with it, and discharges compressed air at a predetermined pressure to a receiver tank.The general structure of the scroll compressor is as follows: A compressor main body and a receiver tank are formed separately. Additionally, the compressor body is often vertical. In the case of an oil-cooled scroll compressor, cooling oil is stored in a receiver tank, supplied into the compressor body via an oil cooler, etc., introduced into the compression chamber, and returned to the receiver tank side together with compressed air. It is sent and used for circulation. In this case, in conventional scroll compressors, no particular consideration was given as to where in the compressor body the recovered oil from the bearings and other parts was to be supplied, and the oil was placed at an appropriate location.

[Problem that the invention seeks to solve]

The cooling oil is introduced into the compression chamber and, as described above, functions to lubricate bearings and other parts that require oil lubrication and to cool each part. There are cases where this cooling oil is not circulated and used and accumulates in the lower part of the compressor body. Therefore, it is necessary to send this accumulated oil to the receiver tank side by some means.

The present invention was devised based on the above requirements, and the location of the oil recovery port from the bearings and other parts that require oil lubrication is devised, and the oil is stored in the compressor body and is not used for cooling. An object of the present invention is to provide an oil-cooled horizontal scroll compressor that eliminates oil, improves the lubrication and cooling effects of the compressor, reduces mechanical loss caused by accumulated cooling oil, and improves compressor efficiency. purpose.

[Means to solve the problem]

For this purpose, the present invention provides lubrication for bearings and other components in a horizontal scroll compressor in which a fixed scroll that engages with an orbiting scroll that is pivotally supported in the compressor body and a receiver tank that stores cooling oil are formed into an integral structure. An oil-cooled horizontal scroll compressor is constructed in which a supply port for collecting oil for lubrication of parts requiring lubrication and cooling of each part is provided at the lowest end of the machine near the end of the outer periphery of the wrap of the orbiting scroll. It is something to do.

[Operation] When the cooling oil supply port is located at the lowest end near the end of the outer periphery of the wrap of the orbiting scroll, the orbiting movement of the orbiting scroll introduces the cooling oil through the supply port and accumulates in the lower part of the compressor body. The remaining oil will be sucked into the compression chamber. This causes the reservoir to enter the compression chamber and be returned to the receiver tank along with the compressed air.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

As shown in FIG. 3, the orbiting scroll 13 is pivotally supported via a bearing 16 on an orbiting shaft 15 eccentrically formed at the tip of a rotating shaft 14. As shown in FIG. The rotating shaft 14 has a bearing 18 on the compressor main body 17.
, 1.9, and rotated by a drive means (not shown).

As shown in FIG. 1, the wrap 20 of the orbiting scroll 13
The wrap 22 of the fixed scroll 21 meshes with the compression chamber 2.
form 3. Air is introduced into the compression chamber 23 from the air suction port 24 shown in FIGS. 1 and 2, compressed to a predetermined pressure, and then discharged from the discharge port 25.

In the case of an oil-cooled horizontal compressor, the fixed scroll 22 and the receiver tank 26 are formed of an integral structure, and the compressor main body 17 and the receiver tank 26 are arranged horizontally as shown in the figure. That is, the rotating shaft 14 is arranged horizontally,
The orbiting surface of the orbiting scroll 13 is arranged in the vertical direction. The orbiting scroll 13 is thrust-supported by the wall of the compressor main body 17 and defines a chamber 9 in which the orbiting scroll 13 and the like are housed and a chamber 3 in which a balancer 27 fixed to the rotating shaft 14 is housed. .

An oil separator 28 for separating oil in the discharged compressed air is installed inside the receiver tank 26, and the oil-separated air is sent to a place of use from a discharge pipe 29. The separated oil 5 is injected from the oil injection port 11, 1.2 which opens into the compressor chamber 23 from the oil hole]0 through the oil cooler 6, and is also transmitted through the return pipe 7 to the seal holder 3o on the left end side in the figure. The oil is returned to the inside of the compressor main body 17 through the oil hole 4 .

The returned oil passes through the bearings 19 and 18 as shown by the arrow and enters the chamber = 4.
- introduced within 3.

The lower end of the compressor body 17 has an oil hole 2 that communicates with the bottom of the chamber 3.
Further, a supply port 1 communicating with the oil hole 2 and into the chamber 9 is provided.

The supply port 1 is provided at the lowest end of the compressor main body 17 that can communicate with the bottom side of the chamber 9 .

Next, the operation of this embodiment will be explained in more detail.

The oil that enters the compressor body 17 from the return pipe 7 through the oil hole 4 cools and lubricates the bearings 16, 18, 19, etc. as described above, collects on the bottom of the chamber 3, and flows through the oil hole 2 and supply port 1 into the chamber. The oil accumulates on the bottom surface of the oil tank 9 to form an oil reservoir 8. That is, the oil 5 returned into the compressor main body 17 lubricates and cools various parts, and then is accumulated in a fixed position as an oil reservoir 8.

As shown in FIG.
The end of the wrap 2o of the orbiting scroll 13 turns as shown in FIG. Accordingly, the intake air and the accumulated oil 8 are transferred to the compression chamber 23.
It acts to draw it inward. In other words, oil 5 in oil sump 8
Almost all of it will be sucked into the compression chamber 23.

The oil 5 introduced into the compression chamber 23 cools the compressed air and is discharged from the discharge port 25 to the receiver tank 26 side for circulation.

As shown below, no oil stagnation 8 is generated within the compressor main body 17, and mechanical losses are reduced accordingly.

〔Effect of the invention〕

According to the present invention, by setting the position of the supply port as described above, oil stagnation does not occur and cooling oil is constantly circulated, improving cooling and lubrication efficiency, and reducing mechanical loss and improving compression efficiency. The effects that can be achieved are twofold.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing the position of the supply port in an embodiment of the present invention;
FIG. 2 is a partially enlarged plan view illustrating the operation of the embodiment;
FIG. 3 is an axial sectional view for clearly showing the position of the embodiment. 1... Supply port, 2.4-. 10...Oil hole, 3°9.
...Chamber, 5...Oil, 6...Oil cooler, 7...
Return pipe, 1.1.12... Injection hole, 13... Orbiting scroll, ]4... Rotating shaft, 15... Rotating axis, 16
,18.19...Bearing, 20°22...Wrap, 2
1...Fixed scroll, 23...Compression chamber, 24...
- Air intake port, 25...Discharge port, 26...Receiver contactor, 27...Balancer, 28...Oil separator, 29...Discharge pipe.

Claims (1)

[Claims] In a horizontal scroll compressor that is integrally formed with a fixed scroll that meshes with an orbiting scroll that is pivotally supported within the main body and a receiver tank that stores cooling oil, the bearings and other parts on the main body side require oil lubrication. 1. An oil-cooled horizontal scroll compressor, characterized in that a supply port for collecting oil for lubricating the parts and collecting cooling oil for each part is provided at the lowermost end near the end of the outer peripheral edge of the wrap of the orbiting scroll.