JPS6388295A - Scroll compressor - Google Patents

Abstract

PURPOSE:To enhance the oil separating efficiency and reduce use of lubricant by fixing upright a plurality of bore plates around a discharge port over a mirror plate of a stationary scroll so that it forms a flow path, fixing upright an exterior plate on the peripheral side facing said flow path, and by placing a lid of flat plate on the tops of the two plates. CONSTITUTION:The part around the top periphery of a mirror plate 2a of a stationary scroll 2 is arranged lower than the central part, and a plurality of bore plates 30 are fixed upright in this low part with a desired flow path reserved. An exterior plate 32 is fixed upright in that position of bore plate 30 facing the flow path. A flat plate 34 is installed solidly at the tops of this exterior plate 32 and bore plate 30 to constitute as a whole an oil separator. Gas incl. atomized lubricant discharged from a discharge port 2c in the center of mirror plate 2a collides with said flat plate 34 to spread in the horizontal direction, and gets rid of the lubricant while colliding with the bore plate 30 and exterior plate 32 to finally flow out to the upper chamber of enclosed vessel.

Description

[Detailed description of the invention] [Purpose of the invention] (Industrial application field) The present invention relates to scroll compressors.

(Prior Art) A scroll compressor, which is a typical example of a conventional scroll displacement machine, is described in Japanese Unexamined Patent Publication No. 11)860-75791, and will be explained with reference to FIG.

The orbiting scroll 1 consists of an end plate 11 and a zip 1b standing upright on the end plate 1a, and the wrap 1b is impregnated,
It is formed by a curve similar to a curve or an impolite. The fixed scroll 2 has the same structure as the orbiting scroll 1, and is provided with a discharge hole 2C in a portion corresponding to the center of the impolist curve of the end plate 2a. The orbiting flow/I/l and the fixed scroll 2 are assembled with the wraps facing inside each other and the wraps 1a and 2b being shifted by a certain angle. The orbiting scroll 1 is rotated so as not to rotate with respect to the fixed scroll 2, and the compression chamber is contracted to compress the gas and discharge it from the discharge hole 2C. Note that the orbiting scroll 1 is rotated by a main shaft 4.

When the main shaft 4 starts rotating, the orbiting scroll 1 starts an orbiting motion. At this time, the gas sucked into the closed container 8 by the suction vibro enters between the end plate 1a of the rotating double scroll 1 and the end plate 2 of the fixed scroll 2. The sealed space closed by both the fixed scroll 2 and the orbiting scroll 1 becomes smaller as the contact point of the wraps 1b, 2b approaches the center, and the gas in the space is compressed. The compressed gas is discharged from the discharge hole 2C and exits from the closed container 8 through the discharge pipe 10.

The lubricating oil stored in the lower part of the closed container 8 is used by the oil supply pump 4a of the main shaft 4 to lubricate the contact surface between the main shaft 4 and the 7 rem ratio and the crank part 4b of the main shaft 4 and the cylinder 1c of the orbiting scroll 1. The remaining oil is supplied to the upper surface of the crank portion 4b. The lubricating oil supplied to the top surface scatters through a hole 1d provided in the cylinder IC and exits from the cylinder IC. The scattered lubricating oil is directly or carried by gas and adheres to the orbiting scroll 1, fixed scroll 2, main shaft 4, frame 12, high pressure receiving ring 14, and Oldham ring 16 to lubricate and seal the sliding surfaces.

(Problems to be Solved by the Invention) However, some of the lubricating oil exits the closed container 8 from the discharge pipe 10 together with the gas. For this reason, the lubricating oil in the closed container 8 sometimes ran out. Therefore, a large amount of lubricating oil was required.

Therefore, an object of the present invention is to provide a scroll congressor that can reduce the amount of lubricating oil.

[Structure of the invention]

(Means for solving the problem) In order to achieve this object, the present invention has the following configuration. That is, a plurality of inner peripheral plates are fixed upright on the outer periphery of the discharge hole of the end plate of the fixed scroll with a desired flow path, and the inner peripheral plates are placed at a position facing the flow path on the outer periphery of the plurality of inner peripheral plates. The outer circumferential plate is rotated, and a flat plate is fixed to the upper ends of the inner circumferential plate and the outer circumferential plate.

(Function) The mist of gas containing lubricating oil discharged from the discharge hole of the fixed scroll hits a flat plate, changes the flow direction, and spreads horizontally. Then, while hitting the inner peripheral plate and the outer peripheral plate, it passes between them and exits the outer peripheral plate. When the gas changes its flow path or flow rate in this way, the atomized lubricating oil contained in the gas has a high inertia, so it cannot follow the flow and adheres to the wall surface.

(Example) An example of the present invention will be described below with reference to FIG. The same reference numerals as in FIG. 3 are given to parts that are the same as or correspond to the conventional parts, and their explanation will be omitted.

The frame has a main bearing 12a, an oil drain hole 12b, and a gas hole 12C, and is press-fitted into the closed container 8.

A fixed scroll 2 and a cover 3 are fixed to the outer periphery of the seven frames n with bolts 18.

The high pressure receiving ring 14 is mounted on the frame 12 and has a concave cross section.

The orbiting scroll 1 is placed on a high pressure receiving ring 14 and meshes with the fixed scroll 2. The space created by the end plate 1a and the high pressure receiving ring 14 communicates with the sealed space closed by both the orbiting scroll 1 and the stationary spacer O-A/2 through the pressure hole IC provided in the end plate 1a.

The Oldham ring 16 is placed so as to be engaged with seven frames, and is engaged with the baking plate 1a of the orbiting scroll 1, so that the orbiting scroll 1 rotates without rotating.

The main shaft 4 is rotatably supported by a main bearing 12a of the frame 12, and the crank portion 4b is rotatably inserted into the cylindrical IC of the orbiting scroll 1. The main shaft 4 also has an oil supply pump 4a inside.

The electric motor section is composed of a rotor and a stator n.

The rotor is fixed to the main shaft 4, and the stator η is press-fitted into the closed container 8.

The support material is press-fitted into the lower part of the closed container 8,
The main shaft 4 passes through the center without contacting it.

The lower main bearing A is fixed to a support material and supports the main shaft 4.

Here, the configuration related to the present invention will be explained using FIG. 1 and FIG. 2. The upper surface of the boundary plate 2a of the fixed scroll 2 is lower near the outer periphery than the center. A plurality of inner circumferential pipes are fixed upright to this lower part with desired flow paths. The outer circumferential plate n is also fixed upright at a position facing the flow path between the inner circumferential plates. A top plate is fixed to the upper end of the inner circumferential plate and the outer circumferential plate. This game uncle, outer peripheral plate &
, one in which the top plate U is integrated is called an oil separator cutter.

Next, the operation of this embodiment will be explained.

When the main shaft 4 is rotated by the electric motor section, the orbiting scroll 1 performs an orbiting motion. Due to this swirling motion, the gas that enters the closed container 8 from the suction vibro passes through the gas hole 12C in the same frame, and passes between the end plate 1m of the rotating flow/I/1 and the end plate 2a of the fixed scroll 2, and then between both scrolls. to go into. The gas compressed between both scrolls is discharged through the discharge hole 2.
C and exits from the closed container 8 through the discharge pipe 10. A part of the compressed gas passes through the pressure hole IC provided in the end plate 1a of the rotating valve 1 to the high pressure receiving ring 1.
4 and the mirror plate 1a. Using this gas pressure, an axial pressing force is applied to the orbiting scroll 1.

The lubricating oil pumped up by the oil supply pump 4a of the main shaft 4 lubricates the contact surfaces between the main shaft 4, the frame 12, the crank part 4b of the main shaft 4, and the cylindrical IC of the orbiting scroll l, and is supplied to the upper end of the crank part 4b. Ru. The lubricating oil supplied to the upper end scatters from the hole 1d of the cylindrical IC, and the high pressure receiving ring 14
and lubricate the area around the Oldham ring 16. Then, some of the lubricating oil becomes mist and is carried by the gas, and the fixed suifu becomes a mist.
It enters the compression chamber formed by the orbiting scroll and the orbiting scroll, and lubricates and seals both scrolls.

The atomized gas containing lubricating oil discharged from the discharge hole 2C of the fixed scroll 2 hits the flat plate &1, changes the flow direction, and spreads in the horizontal direction. Then, the outer circumferential plate passes between them while hitting the inner circumferential plate (capital) and the outer circumferential plate! Go outside. When the gas changes its flow path or velocity, the mist of lubricating oil contained in the gas cannot follow the flow due to its high inertia, and it adheres to the flat plate A, the inner circumferential plate 11 and the outer circumferential plate. do.

This attached lubricating oil accumulates at a lower portion near the outer periphery of the upper surface of the end plate 2a of the fixed scroll 2. Since this is a low part, the gas is blown up by the gas and flows from here into the recess 36 formed by the fixed scroll 2 and the closed container 8, passes through the oil drain and returns to the lower part of the closed container 8.

In this way, the gas containing lubricating oil can be reliably separated and returned to the lower part of the closed chamber G8.

3 and 4 are horizontal sectional views of an oil separator 40 showing another embodiment, in which the shapes of the inner peripheral plate (9) and the outer peripheral plate n are changed. Such a configuration also has similar effects.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to separate the lubricating oil mixed with the gas before it goes out of the sealed container and return it to the lower part of the sealed container, thereby providing a compressor that uses less lubricating oil. Can be done.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a scroll compressor showing one embodiment of the present invention, FIG. 2 is a horizontal sectional view of an oil separator, and FIGS. 3 and 4 are horizontal sectional views of an oil separator showing other embodiments. FIG. 5 is a cross-sectional view of a conventional scroll compressor. 1... Orbiting scroll 2... Fixed scroll I... Inner peripheral plate! ...Outer peripheral plate U...Flat
Board agent Patent attorney Nori Chika Ken Yudo Yukio Yuyama Suf 0-Rukon Aleph f/) I! ffa convex diagram Figure 2 Figure 3 Figure s 4 Figure Figure 5

Claims (1)

[Claims] A fixed scroll having an end plate and a wrap standing upright on the end plate, and an orbiting scroll having an end plate and a wrap standing upright on the end plate are engaged with each other with the wraps inside, and the orbiting scroll makes an orbiting movement to compress the fluid. In the device, a plurality of inner peripheral plates are fixed upright on the outer periphery of the discharge hole of the end plate of the fixed scroll with a desired flow path formed therein, and a plurality of inner peripheral plates are arranged on the outer periphery of the plurality of inner peripheral plates facing the flow path. A scroll compressor characterized in that an outer circumferential plate is fixed in position, and a flat plate covering the upper ends of the inner circumferential plate and the outer circumferential plate is fixed to the upper ends of the inner circumferential plate and the outer circumferential plate.