JP3215466B2 - Horizontal hermetic 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 a scroll compressor used for refrigeration, air conditioning, refrigerators, etc., and more particularly to a horizontal hermetic scroll compressor which is installed horizontally.

[0002]

2. Description of the Related Art A conventional horizontal hermetic scroll compressor is disclosed in Japanese Patent Application Laid-Open No. 61-212689.

Hereinafter, the conventional horizontal hermetic scroll compressor will be described with reference to the drawings. A horizontal hermetic scroll compressor is disclosed in Japanese Patent Application Laid-Open No. 61-21268.
As already known in Japanese Patent Application Laid-Open No. 9-209, details thereof are omitted.

FIG. 4 is a longitudinal sectional view of a conventional horizontal hermetic scroll compressor, and FIG. 5 is a sectional view of an oil supply mechanism of a bearing in FIG.

In the figure, reference numeral 1 denotes a closed container,
a, a first side shell 1b, and a second side shell 1c. Reference numeral 2 denotes a scroll compressor unit, and 3 denotes an electric motor unit.
Is housed inside. An oil reservoir 5 is formed at the bottom of the sealed container 1 to store the oil 5a, and the height of the oil level is maintained at a level lower than the lower end of the rotor 3a of the electric motor unit 3.

The scroll compressor unit 2 includes a fixed scroll 6
The fixed scroll 6 is provided with a discharge port 9 at its center and a suction port 10 at its outer periphery.
Has a revolving bearing 11 on the opposite side to mesh with the fixed scroll 6.

Reference numeral 12 denotes a frame, which has a sliding bearing 13 inside.
And rolling bearings 14, these bearings 13,
The horizontal rotary shaft 4 is supported by 14. The tip of the horizontal rotary shaft 4 is an eccentric shaft 4 a, which is inserted into the turning bearing 11. The rear end of the horizontal rotary shaft 4 is connected to the rotor 3a by connecting the motor shaft 3b. 3c
Is an electric motor stator.

A suction pipe 15 is connected to a suction port 10 of the fixed scroll 6 through the second side shell 1c of the sealed container 1, and a discharge chamber 16 having a discharge port 9 is open to a passage 1
It communicates with the machine room 18 through 7. In the oil sump 5, the discharge chamber 16 side and the machine chamber 18 side are connected to the fixed scroll 6 and the oil passage 1 provided in the lower portion of the frame 12.
9.

On the back side of the orbiting scroll 7, an intermediate pressure chamber 20 is formed, which is surrounded by the end plate 7a of the orbiting scroll 7, and pores (not shown) provided in the end plate 7a in the intermediate pressure chamber 20.
The pressure during the compression (intermediate pressure) is guided through the rotary shaft 7 to apply a pressing force to the fixed scroll 6 to the orbiting scroll 7.

The horizontal rotary shaft 4 is provided with an oil supply passage 21 a for supplying lubricating oil to the slide bearing 13, the rolling bearing 14, and the turning bearing 11, and the frame 12 communicates the oil supply passage 21 a with the oil passage 19. An oil hole 31 is provided. A discharge pipe 22a attached to the first side shell 1b of the sealed container 1 is connected to the machine room 18.

On the other hand, a partition plate 23a is fixed in the closed container 1, and an auxiliary oil chamber 33 partitioned from the machine chamber 18 is formed in the closed container 1. The discharge pipe 22a passes through the partition plate 23a and faces the machine room 18. Auxiliary oil chamber 3
3 is filled with a predetermined amount of oil 5a.
Is provided with a static pressure introduction hole 32 that opens into the auxiliary oil chamber 33. In the partition plate 23a, a communication hole 24a for communicating the auxiliary oil chamber 33 with the oil reservoir 5 is provided at a position below the lower end surface of the rotor 3a.

The operation of the horizontal hermetic scroll compressor constructed as described above will be described below.

The low-pressure gas guided from the suction pipe 15 to the suction port 10 is compressed by the orbiting movement of the orbiting scroll 7.
Gradually decrease and move to the center while increasing the pressure, and the gas increases the pressure. On the other hand, the oil 5a supplied to the slide bearing 13, the rolling bearing 14, and the revolving bearing 11 through the oil pumping hole 31 and the oil supply passage 21a is injected into the compression chamber 8 through the intermediate pressure chamber 20, and the oil 5a is compressed. Mix.

The high-pressure gas containing oil is discharged from the discharge port 9, and is discharged through the discharge chamber 16 and the passage 17.
Flows into At this time, since the flow velocity in the gas is greatly reduced, the oil contained in the gas is separated, and the oil is separated from the oil sump 5.
To fall. The high-pressure gas from which the oil has been separated is supplied to the discharge pipe 22a.
It is discharged out of the machine.

Next, when the oil level in the auxiliary oil chamber 33 is higher than the oil level in the oil sump 5 in the state where the operation is stopped, the oil 5a in the auxiliary oil chamber 33 is moved by gravity to the oil sump 5. Until it reaches the same height as the oil level, the oil flows out to the oil reservoir 5 through the communication hole 24a provided in the partition plate 23a. When the operation is started from this state, the static pressure of the static pressure introduction hole 32 decreases due to the flow velocity of the gas flowing in the discharge pipe 22a, and the pressure in the auxiliary oil chamber 33 decreases accordingly.

Therefore, due to the pressure difference between the auxiliary oil chamber 33 and the oil sump 5, the oil 5a of the oil sump 5 is sucked into the auxiliary oil chamber 33 through the communication hole 24a, and the oil level of the oil sump 5 is lowered. The oil level in the auxiliary oil chamber 33 rises.

This phenomenon is caused by the fact that the oil level of the oil reservoir 5 is
a Continue until it lowers to the upper end, and when it falls below this, the machine room 18
Gas flows into the auxiliary oil chamber 33, so that the oil level is
It is kept near the upper end of a. When the amount of oil flowing out together with the gas from the discharge pipe 22a is larger than the amount flowing from the suction pipe 15 and the oil level of the oil reservoir 5 is reduced, the communication holes 24
Gas flows into the auxiliary oil chamber 33 from a, the oil in the auxiliary oil chamber 33 flows out to the oil reservoir 5, and the oil level is kept constant.

[0018]

However, in the above structure, the volume of the oil reservoir 5 formed at the bottom of the closed container 1 is small, and the distance between the frame 12 and the bottom of the closed container 1 is also small. , The position of the oil lifting hole approaches the bottom of the closed container 1. On the other hand, abrasion powder, foreign matter, and the like due to sliding generated in the bearing portions 13 and 14 flow from the discharge chamber 16 and the machine chamber 18 into the narrow oil reservoir 5 and accumulate. The abrasion powder and foreign matter are pumped up together with the oil from the oil pumping hole and enter the bearings 13 and 14 through the oil supply passage 21a. .

In view of the above-mentioned disadvantages, the present invention secures an appropriate amount of oil filling, eliminates abrasion powder and foreign matter from being mixed into the oil supplied to the bearing, and prevents seizure of the bearing due to stable oil supply. A highly reliable horizontal hermetic scroll compressor is provided.

[0020]

In order to solve the above-mentioned problems, a horizontal hermetic scroll compressor according to the present invention comprises a scroll compressor section and an electric motor section in an airtight container having an oil reservoir at the bottom for storing oil. And a machine room connected by a horizontal rotary shaft having an oil supply passage penetrating therethrough,
An oil supply chamber that supplies oil to the scroll compressor section, and a gas communication hole that separates the mechanical chamber and the oil supply chamber and generates a pressure difference between the two chambers are connected to the oil in both chambers at the upper end. A partition plate provided with an oil communication hole at a lower end portion is stored,
While one end of the discharge pipe is located at the upper part of the oil supply chamber and attached to the closed container, an oil supply conduit whose one end is located at the oil supply chamber bottom part is provided on the oil supply chamber side of the partition plate, and the oil supply passage of the horizontal rotary shaft is provided. It is constituted by a refueling mechanism in which a refueling spring provided at a tip opening is inserted into the refueling conduit.

The horizontal hermetic scroll compressor according to another aspect of the present invention further comprises an upper notch located at an upper end on an outer peripheral portion of the partition plate, and two positions on a tangent line in contact with a lower end of the motor rotor. Are provided with lower end notches, respectively, and the outer peripheral portion is fixed to a connecting portion between a first side shell and a body shell constituting the closed container.

[0022]

According to the horizontal hermetic scroll compressor of the present invention, when the compressed high-pressure gas flows out of the discharge pipe from the discharge pipe through the machine room and the oil supply chamber, the gas flows through the gas communication hole provided in the partition plate. The path resistance causes a pressure difference between the machine room and the oil supply chamber, and the pressure difference causes the oil in the oil reservoir to flow into the oil supply chamber through the oil communication hole, and the oil level in the oil supply chamber rises, and the oil amount increases. To increase. The oil that has flowed into the oil supply chamber is pumped up by an oil supply spring provided on the horizontal rotary shaft inserted into the oil supply conduit of the partition plate, and is supplied to each part through an oil supply passage.

On the other hand, since the abrasion powder and foreign matter that accumulate in the oil reservoir at the bottom of the closed container are blocked by the partition plate and do not enter the oil supply chamber, the oil in the oil supply chamber may contain the wear powder and foreign matter. Absent. Therefore, there is no intrusion of abrasion powder or foreign matter into the bearing portion, and wear and seizure of the bearing portion are prevented,
Reliability can be improved.

Further, in the horizontal hermetic scroll compressor according to another aspect of the present invention, a gas communication hole is provided between an upper end notch provided on an outer peripheral portion of the partition plate and the closed container, and a gas communication hole is provided between the lower end notch and the closed container. Oil communication lines are formed between the two, and the oil in the oil supply chamber is secured as described above, and wear and seizure of the bearing portion due to the abrasion powder and foreign matter can be prevented. On the other hand, in assembling the present compressor, after inserting a refueling spring provided on a horizontal rotary shaft connecting the scroll compressor portion housed in the body shell and the electric motor portion into the refueling conduit of the partition plate, the machine room and the refueling are stopped. There is an advantage that the positional relationship of the conduit can be easily adjusted and confirmed.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the horizontal hermetic scroll compressor according to the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a sectional view showing a first embodiment of a horizontal hermetic scroll compressor according to the present invention. Reference numeral 26 denotes a refueling chamber, in which a discharge pipe 23 is provided via a refueling mechanism 25 and a first side shell 1b forming the closed container 1.

The machine room 18 and the oil supply room 26 are separated from the partition plate 23.
The partition plate 23 is provided with a gas communication hole 27 for communicating the machine chamber 18 and the oil supply chamber 26 at an upper end thereof, and an oil communication hole 24 for communicating oil between the two chambers at a lower end thereof. One end of the plate 23 on the side of the refueling chamber 26 is provided with a refueling conduit 29 whose one end is located at the bottom of the refueling chamber 26, and the horizontal rotary shaft 4 connecting the scroll compressor unit 2 and the electric motor unit 3 in the refueling conduit 29. A refueling mechanism 25 in which a refueling spring 28 fixed to an opening at the end of a refueling passage 21 penetrating therein is inserted.
Is composed.

The operation of the horizontal hermetic scroll compressor configured as described above will be described.

The high-pressure gas compressed in the compression chamber 8 flows from the discharge port 9 through the discharge chamber 16 and the passage 17 into the machine room 18, where the oil contained in the gas is separated.
Only the oil falls into the oil sump 5. The gas from which the oil has been separated further flows into the oil supply chamber 26 through the gas communication hole 27 of the partition plate 23, and flows out of the machine through the discharge pipe 22. When passing through the gas communication hole 27 of the partition plate 23, the gas communication hole 27
, A pressure difference occurs between the machine chamber 18 and the oil supply chamber 26.

That is, when the pressure of the oil supply chamber 26 decreases, the oil 5a of the oil reservoir 5 flows into the oil supply chamber 26 through the oil communication hole 24, the oil level of the oil supply chamber 26 rises, and the oil amount is sufficiently increased. A large amount of oil is secured. The oil 5a flowing into the oil supply chamber 26 is supplied to the oil supply mechanism 25 provided on the partition plate 23.
The oil is pumped by an oil supply spring 28 and supplied to the slide bearing 13, the rolling bearing 14, and the revolving bearing 11 through an oil supply passage 21 in the horizontal rotary shaft 4. On the other hand, abrasion powder, foreign matter, and the like accumulated in the oil reservoir 5 at the bottom of the sealed container 1 are blocked by the partition plate 23, so that entry into the oil supply chamber 26 is prevented.

Therefore, a sufficient amount of oil is maintained in the oil supply chamber 26 and is not contaminated by abrasion powder or foreign matter, and fresh oil is constantly supplied to each bearing.
Seizure is prevented, and the reliability of the bearing portion can be improved.

Next, a description will be given of a second embodiment of the horizontal hermetic scroll compressor according to the present invention. The same components as those of the first embodiment are denoted by the same reference numerals, and a detailed description thereof will be omitted. .

FIGS. 2 and 3 show a second embodiment of a horizontal hermetic scroll compressor according to the present invention. FIG. 2 is a sectional view thereof, and FIG. 3 is a view taken along the line AA of FIG. Things.

In the figure, reference numeral 23a denotes a partition plate provided with the above-described oil supply mechanism 25, and partitions an oil supply chamber 26 and a machine chamber 18. An outer peripheral portion 30 of the partition plate 23 is provided with an upper notch portion 30a located at an upper end portion and a lower end notch portion 30b at two positions on a tangent line in contact with a lower end portion of the motor rotor 3a. Numeral 30 is fixed to a connecting portion 1d between the first side shell 1b and the shell 1a constituting the closed container 1.

With respect to the compressor configured as described above,
The operation will be described. The upper end notch 30a of the outer peripheral portion 30 of the partition plate 23 is
6 as communication holes, and the motor rotor 3a
The two lower notches 30b on the tangent to the lower end of the
It functions as a communication hole for communicating oil between the oil supply chamber 26 and the oil sump 5.

Therefore, as described above, the oil level in the oil supply chamber 26 rises due to the differential pressure between the machine chamber 18 and the oil supply chamber 26,
Since the amount of oil is increased and wear particles and foreign matter do not enter, wear and seizure of the bearing portion can be prevented.

On the other hand, at the time of assembling the compressor, an oil supply spring 28 fixed to the horizontal rotary shaft 4 connecting the scroll compressor section 2 housed in the body shell 1a and the electric motor section 3 is provided.
Is inserted into the oil supply conduit 29 of the partition plate 23, and the adjustment and confirmation of the assembly positional relationship between the machine chamber 18 and the oil supply conduit 29 can be easily performed. As a result, defective lubrication due to assembly adjustment errors is prevented, and oil containing no abrasion powder or foreign matter is supplied to each bearing. This prevents wear and seizure of the bearing and improves the reliability of the bearing. Can contribute.

[0038]

As described above, the horizontal hermetic scroll compressor according to the present invention has a scroll compressor portion and an electric motor portion in a closed container having an oil reservoir at the bottom for storing oil. A mechanical chamber connected by a rotating shaft, an oil supply chamber for supplying oil to the scroll compressor section, and a gas communication hole that separates the mechanical chamber and the oil supply chamber and generates a pressure difference between the two chambers have upper ends. A partition plate provided with an oil communication hole at the lower end portion for communicating oil between the two chambers, and one end of a discharge pipe is located at the upper part of the oil supply chamber and is attached to the closed container, while the partition plate has The oil supply chamber is provided with an oil supply pipe one end of which is located at the bottom of the oil supply chamber, and an oil supply spring provided on the horizontal rotary shaft is inserted into the oil supply pipe. Oil quantity is kept Since the free oil powder or foreign matter is supplied to the bearings, the wear-seizure of the bearing portion is prevented, thereby improving the reliability of the bearing unit.

According to another horizontal hermetic scroll compressor of the present invention, in addition to the structure of the first present invention, an upper end notch on an outer peripheral portion of the partition plate and a tangential line in contact with a lower end of the motor rotor are provided. The lower end notch portions are provided at two places, and the outer peripheral portion is fixed to the connecting portion between the first side shell and the body shell constituting the closed container, so that refueling failure due to an assembly adjustment error is prevented. At the same time, oil that does not contain abrasion powder or foreign matter is supplied to each bearing portion, so that abrasion and seizure of the bearing portion are prevented, and the reliability of the bearing portion can be improved.

[Brief description of the drawings]

FIG. 1 is a sectional view of a first embodiment of a horizontal hermetic scroll compressor according to the present invention.

FIG. 2 is a sectional view of a second embodiment of the horizontal hermetic scroll compressor according to the present invention.

FIG. 3 is a view taken in the direction of arrows AA in FIG. 2;

FIG. 4 is a sectional view of an example of a conventional horizontal hermetic scroll compressor.

FIG. 5 is a cross-sectional view showing a refueling mechanism in a conventional horizontal hermetic scroll compressor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Closed container 1a Body shell 1b 1st side shell 1d Joining part 2 Scroll compressor part 3 Electric motor part 4 Horizontal rotary shaft 5 Oil sump part 5a Oil 18 Machine room 21 Oil supply passage 23 Partition plate 24 Oil communication hole 25 Oil supply mechanism 26 Oil supply Chamber 27 Gas communication hole 28 Oil supply spring 29 Oil supply conduit 30 Outer periphery 30a Upper cutout 30b Lower cutout

Claims (2)

(57) [Claims] 1. A scroll chamber having a scroll compressor section and an electric motor section provided side by side and connected by a horizontal rotary shaft in a hermetically sealed container having an oil reservoir section for storing oil at a bottom portion, and the scroll compressor section. An oil supply chamber for supplying oil to the oil supply chamber, a gas communication hole that separates the machine chamber and the oil supply chamber and generates a pressure difference between the two chambers at an upper end, and an oil communication hole that communicates oil between the two chambers at a lower end. A partition plate provided in each of the sections, and one end of a discharge pipe is attached to the closed container located at the upper part of the oil supply chamber, and one end of the partition plate on the oil supply chamber side is located at the bottom part of the oil supply chamber. A horizontal hermetic scroll compressor having an oil supply mechanism in which an oil supply spring provided on the horizontal rotary shaft is inserted into the oil supply conduit. 2. An outer peripheral portion of the partition plate is provided with an upper end notch portion located at an upper end portion and two notch portions at a position tangential to a lower end portion of the motor rotor, and the outer peripheral portion is provided in the closed container. 2. The horizontal hermetic scroll compressor according to claim 1, wherein the horizontal hermetic scroll compressor is fixed to a connecting portion between the first side shell and the body shell.