JPH09222088A - Vertical type rotary compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To collect a foreign matter mixed in refrigerator oil fed to each slide part and to prevent lock of a slide part due to the foreign matter and the occurrence of abnormal wear. SOLUTION: A main bearing 6 is provided with a feed oil hole 6a extending to a vane slot 2a and the feed of refrigerating oil 10 is effected between the main bearing 6 and a vane 5. A notch part 5a inclined toward the communication hole 18a side is formed in the back side of the vane 5 and a foreign matter gathering in the feed oil hole 6a is discharged from the notch part 5a to the communication hole 18a. A down bag-form foreign matter arresting part 15a is arranged at the part, approaching the inner wall of a feed oil passage 4b, of a twist plate 15 for feed oil arranged in the feed oil passage 4b in a crank shaft 4. This constitution arrests a foreign matter having specific gravity higher than that of the refrigerator oil. Further, a foreign matter collection net 19 is arranged at the lower end part of the twist plate 15 for feed oil and this constitution arrests a foreign matter having specific gravity lower than the refrigerator oil 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to a rotary compressor used in a refrigerator such as an air conditioner or a refrigerator, and more particularly to a vertical rotary compressor suitable for improving reliability.

[0002]

2. Description of the Related Art FIG. 6 shows, for example, Japanese Patent Application No. 6-27614.
FIG. 4 is a vertical cross-sectional view showing an example of a conventional vertical rotary compressor disclosed in Japanese Patent Publication No. 4), wherein 1 is a closed container, 2 is a cylinder, 2a is a vane slot, 2b is a cylinder chamber, 3 is a roller, and 4 is a crank. Shaft, 4a is an eccentric part, 4b is an oil supply passage, 4c is a lateral hole, 5 is a vane, 6 is a main bearing, 6a is an oil supply hole, 7 is an auxiliary bearing, 8 is a rotor, 9 is a stator, 10 is refrigerating machine oil. , 11 is an electric motor part, 12 is a compression mechanism part, 13 is a silencer cover, 14 is an oil supply piece, 15 is a twist plate for oil supply, 16 is a spring, 17 is a discharge pipe, and 18a and 18b are communication holes.

FIG. 7 is a sectional view taken along the line A--A in FIG. 6 as viewed in the direction of the arrow, in which 2c is a suction chamber and 2d is a compression chamber. I am wearing it.

As shown in FIG. 1, the vertical rotary compressor has an electric motor portion 11 composed of a rotor 8 and a stator 9 accommodated in an upper part of a closed container 1 in which a refrigerating machine oil 10 is stored, and a compression part is arranged below the electric motor part 11. The mechanism unit 12 is housed, and the electric motor unit 11 and the compression mechanism unit 12 are connected by the crankshaft 4.

In the compression mechanism portion 12, the main bearing 6 and the sub bearing 7
The crankshaft 4 is supported by the cylinder 2, and the cylinder 2 is provided between the main bearing 6 and the sub bearing 7. The inner space of the cylinder 2 is closed by the side surfaces of the main bearing 6 and the sub bearing 7 to close the cylinder chamber. 2b. A roller 3 is provided in the cylinder chamber 2b, and an eccentric portion 4a of the crankshaft 4 is loosely engaged with the roller 3.

Therefore, in FIG. 7, when the crankshaft 4 rotates, the eccentric portion 4a eccentrically rotates in the cylinder chamber 2b, and at the same time, the roller 3 rotates the cylinder chamber 2b around the center line of the crankshaft 4. Revolve around the wall surface in the direction indicated by the white arrow. The vane 5 is constantly pressed against the outer circumference of the roller 3 by the spring 16 (FIG. 6), whereby the vane 5 reciprocates in the vane slot 2a following the revolving movement of the roller 3, and by the vane 5. The cylinder chamber 2b is partitioned into a low pressure suction chamber 2c and a high pressure compression chamber 2d.

The refrigerant gas from the refrigeration cycle (not shown) sent into the suction chamber 2c from a suction pipe (not shown) attached to the closed container 1 is compressed by the revolution movement of the roller 3. This suction chamber 2c becomes the compression chamber 2d along with the revolution of the roller 3, and the sufficiently compressed high-pressure refrigerant gas passes through a passage (not shown) provided in the auxiliary bearing 7 in FIG. 6, or the main bearing 6, the cylinder 2 and the auxiliary bearing. It is sent to a silencer formed by a sub bearing 7 and a silencer cover 13 provided therein through a passage (not shown) provided through the bearing 7, and further, the sub bearing 7, the cylinder 2 and the main bearing 6
It is discharged from the upper surface of the main bearing 6 to the space of the closed casing 1 on the side of the electric motor portion 11 through a passage (not shown) provided therethrough. Then, it is discharged from a discharge pipe 17 connected to this closed container 1 to a refrigeration cycle (not shown).

Here, the space on the side of the electric motor 11 in the closed container 1 and the space at the bottom of the container are communicated with each other by the communication holes 18a, 18b provided in the cylinder 2, and by the communication holes 18a, 18b. The refrigerating machine oil 10 is usually enclosed so that the cylinder 2 is sufficiently immersed in the refrigerating machine oil 10 (that is, up to the height of the upper surface of the cylinder 2).

Further, as is apparent from FIG. 7, the vane 5
The vane slot 2a in which is slid is formed so as to extend from the cylinder chamber 2b to the communication hole 18a.

FIG. 8 is a vertical sectional view showing the oil supply mechanism for the refrigerating machine oil 10 in FIG. 6, and the parts corresponding to those in FIG.

In the figure, when the crankshaft 4 rotates, the refrigerating machine oil 10 is sucked up as shown by the solid arrow by utilizing the centrifugal force with an oil supply piece 14 provided at the lower end of the crankshaft 4 for oil supply. The twisting plate 15 allows the oil supply passage 4 passing through the inside of the crankshaft 4 as indicated by a solid arrow.
Pumped along the inner wall of b. The pumped refrigerating machine oil 10 has a differential pressure from the lateral holes 4c provided above and below the eccentric portion 4a of the crankshaft 4 to the sliding portions between the crankshaft 4 and the main bearings 6 and the auxiliary bearings 7 and the rollers 3. Supplied by
The refrigerating machine oil 10 supplied into the roller 3 is supplied to the sliding portion between the inner surface of the roller 3 and the eccentric portion 4a, and further, as shown by a solid arrow in FIG. By the pressure difference between the roller 3 and both end surfaces of the roller 3 and the main bearing 6 and the auxiliary bearing 7, the pressure difference is supplied to the sliding portion between the outer surface of the roller 3 and the wall surface of the cylinder chamber 2b.

Further, in this prior art, the main bearing 6
In, the oil supply hole 6a communicating with the vane slot 2a is provided, and the refrigerating machine oil 10 flowing down from the upper end of the main bearing 6 along the flange surface thereof as shown by the solid arrow enters the oil supply hole 6a. As a result, the refrigerating machine oil 10 is applied to the sliding portion between the vane slot 2a and the vane 5.
I am trying to refuel.

[0013]

By the way, in the above-mentioned prior art, when foreign matter is mixed in the refrigerating machine oil 10, the lubrication performance to the sliding parts is deteriorated, which causes locking and abnormal wear of each sliding part. .

That is, in the above conventional technique, as described above,
An oil supply hole 6a is provided to supply oil to the sliding portion between the main bearing 6 and the vane 5. However, foreign matter is likely to accumulate in the oil supply hole 6a during operation, and the oil supply performance is deteriorated or the accumulated foreign matter. Enters the gap between the main bearing 6 and the vane 5 and causes the vane 5 to be locked.

Further, as a mechanism for collecting abrasion powder in the sliding portion inside the compressor and foreign matter carried in from the refrigeration cycle,
It has been proposed that a magnet be provided at the bottom of the closed container 1, but if the foreign matter is a metal, it is possible to collect the foreign matter to some extent, but even such foreign matter is completely collected. Is difficult to collect, and it is impossible to collect non-metallic foreign matter such as cotton dust,
There is a problem that foreign matter sucked up together with the refrigerating machine oil 10 into the oil supply passage 4c of the crankshaft 4 enters into each sliding portion and causes locking or abnormal wear.

An object of the present invention is to solve such problems, eliminate foreign matters in the refrigerating machine oil to be replenished, and prevent the occurrence of locking and abnormal wear at sliding parts, thereby improving reliability. To provide an improved vertical rotary compressor.

[0017]

In order to achieve the above-mentioned object, the present invention is such that the rear side of a vane that reciprocates in a vane slot communicates with an oil supply hole provided in the main bearing for the vane. Provide a notch that does not exist.

With this structure, the refrigerating machine oil that has been supplied through the oil supply passage of the crankshaft and leaks from the main bearing flows into the oil supply hole, but the oil supply hole does not communicate with the notch provided in the vane. At times, the refrigerating machine oil that has flowed into the oil supply hole is supplied to the sliding portion between the main bearing and the vane in the vane slot, and at this time, foreign matter mixed in the refrigerating machine oil collects in the oil supply hole. When this remains, it gradually enters the sliding part between the main bearing and the vane, which eventually locks the vane. Therefore, in the present invention, since the vane is provided with the above-mentioned cutout portion, when the vane moves in the vane slot and the cutout portion is connected to the oil supply hole of the main bearing, the foreign matter accumulated in the oil supply hole is notched. It is dropped into the section and eliminated.

Further, according to the present invention, a downward bag-like foreign matter collecting portion is provided at a portion of the twisting plate for oil supply provided in the oil supply passage of the crankshaft in the vicinity of the wall surface of the oil supply passage.

With such a construction, the rotation of the crankshaft causes the rotation of the refrigerating machine oil in the oil supply passage, whereby a centrifugal force acts on the refrigerating machine oil, and the refrigerating machine oil rises as an oil film on the wall surface of the oil supply passage. The rise continues due to the twist plate for refueling, but at this time, centrifugal force also acts on the refrigeration oil. In this case, if the refrigerating machine oil contains foreign matter having a larger specific gravity than this, the foreign matter rises while being pushed toward the wall surface side of the oil supply passage. Therefore, the refrigerating machine oil that rises on the side closer to the wall surface of the oil supply passage will collide with the foreign matter collection section provided near this wall surface. Captured by the department.

Further, according to the present invention, a foreign matter collecting net having a bag-shaped net attached to a ring having a shape that floats on the refrigerating machine oil and obstructs the flow of the refrigerating machine oil is moved up and down at the lower end of the twist plate for refueling. Provide as much as possible.

According to this structure, when the crankshaft rotates and the refrigerating machine oil rises in the form of an oil film along the wall surface of the oil supply passage as described above, the foreign matter collecting net is formed at the lower end of the oil supply passage. Are floating on the surface of the refrigerator oil.
In this case, the refrigerating machine oil is rotating at the lower end of the oil supply passage, but the ring of the foreign matter collection net obstructs this flow. Therefore, the refrigerating machine oil near this ring will flow into the foreign matter collection net, which causes foreign matter floating in the refrigerating machine oil that has a smaller specific gravity than the refrigerating machine oil, such as cotton dust, to enter the foreign matter collection net. Will be captured.

[0023]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a vertical cross-sectional view showing a main part of an embodiment of a vertical rotary compressor according to the present invention. 5a is a notch, 15a is a foreign matter collecting part, 19 is a foreign matter collecting net, and FIG. Corresponding parts will be assigned the same reference numerals and overlapping description will be omitted. The overall configuration of this embodiment is similar to that of the conventional vertical rotary compressor shown in FIG.

In FIG. 1, as described above, the cylinder 2 is provided with a communication hole 18a which extends from the main bearing 6 side to the sub bearing 7 side, and the vane slot 2a extends from the cylinder chamber 2b to this communication hole. 18a has been reached. And
On the back side of the vane 5, a notch 5a that faces the side surface of the main bearing 6 and is inclined toward the communication hole 18a is provided. The notch portion 5a is formed in accordance with the reciprocating motion of the vane 5,
It connects to or separates from the oil supply hole 6a.

The refueling hole 6a is positioned so as to face the upper end surface of the vane 5 when it does not face the notch portion 5a due to the reciprocating motion of the vane 5, whereby the above-mentioned conventional technique is used. So that the vane 5 and the main bearing 6
Refrigerating machine oil 10 is supplied to the sliding portion between and.

FIG. 2 is a diagram showing the operation of removing foreign matter that has entered the oil supply hole 6a. The parts corresponding to those in FIG. 1 are designated by the same reference numerals and duplicate description will be omitted.

FIG. 2A shows a state in which the vane 5 moves in the direction of the white arrow and the oil supply hole 6a is separated from the cutout portion 5a. In this case, as shown by the solid line arrow, the main bearing is shown. Refrigerating machine oil 10 that has flowed into the oil supply hole 6a from the upper surface of 6 is supplied to the upper end surface of the vane 5, and the oil film of the refrigerating machine oil 10 is formed on this upper end surface as the vane 5 moves in the direction of the white arrow. Then, when the moving direction of the vane 5 is reversed, the upper end surface of the vane 5 on which the oil film of the refrigerating machine oil 10 is formed slides on the side surface of the main bearing 6, and thus the main bearing 6 and the vane 5 are moved. Oil is supplied to the sliding portion between and.

Then, as shown in FIG. 2 (b), when the cutout portion 5a on the back surface of the vane 5 faces the oil supply hole 6a, the foreign matter accumulated in the oil supply hole 6a falls into the cutout portion 5a and communicates therewith. Refrigerating machine oil 10 accumulated there through the hole 18a
2C, and then, as shown in FIG. 2C, when the moving direction of the vane 5 reverses, the cutout portion 5a separates from the oil supply hole 6a, and when the moving direction of the vane 5 reverses again, the cutout portion is caused by inertia. The foreign matter of 5a flows into the refrigerating machine oil 10 in the communication hole 18a.

In this way, the foreign matter that has entered the oil supply hole 6a can be removed to the communication hole 18a, and the foreign matter can be suppressed from entering the sliding portion between the main bearing 6 and the vane 5. Therefore, the lock of the vane 5 can be prevented, and the reliability of the compressor can be improved.

Returning to FIG. 1, as the crankshaft 4 rotates, the refrigerating machine oil 10 is pumped up to the oil supply passage 4b inside the crankshaft 4 by the centrifugal force of the oil supply piece 14 installed at the lower end of the crankshaft 4. However, at this time, the refrigerator oil 10
If a foreign substance is mixed in, the foreign substance may also be pumped up. Further, the refrigerating machine oil 10 including the pumped foreign matter rises along the inner wall of the oil supply passage 4b by the refueling twist plate 15 installed in the oil supply passage 4b in the crankshaft 4. Foreign matter having a higher specific gravity than the machine oil 10 is pressed against the inner wall of the oil supply passage 4b in the crankshaft 4 by the centrifugal force.

Therefore, in this embodiment, the crankshaft 4
Twist plate 15 for refueling installed in refueling passage 4b of
A downward bag-shaped foreign matter collecting portion 15a is provided at the bottom so that the foreign matter can be removed. Less than,
This point will be described with reference to FIG.

FIG. 3 is an enlarged vertical sectional view showing a portion of the compression mechanism portion 12 of the crankshaft 4 in FIG. 1, and 10a is an oil film, and the portions corresponding to FIG. And redundant description will be omitted.

FIG. 4 is an enlarged view of the foreign matter collecting portion 15a in the portion B of FIG. 3, in which 20a is a cutout portion, and 2a.
Reference numeral 0b is a folded portion.

In FIG. 3, a downward bag-like foreign matter collecting portion 15a is provided at a portion of the twisting plate 15 for refueling which is in contact with the inner wall of the refueling passage 4b of the crankshaft 4. The twist plate 15 for refueling rotates with the rotation of the crankshaft 4, whereby the refrigerating machine oil 10 rises while rotating in the refueling passage 4b of the crankshaft 4. Due to the centrifugal force at this time, foreign matter having a large specific gravity is used for the refueling passage. It moves toward the inner wall of 4b, and is pressed and collected by the foreign matter collecting unit 15a during the movement.

In FIG. 4, a cut is made in the side portion of the twist plate 15 for refueling, and the cut portion is folded back to make a folded portion 2 below the cutout 20a.
0b is formed. The folded-back portion 20b and the side portion of the twisting plate 15 for refueling form a downward bag-shaped foreign matter collecting portion 15a.

The refrigerating machine oil 10 that has risen in the oil supply passage 4b of the crankshaft 4 by the rotation of the twist plate 15 for oil supply.
Among them, as shown by the solid line arrow, the refrigerating machine oil 10 that has risen on the wall surface side of the oil supply passage 4b contains a foreign matter having a large specific gravity, and by hitting the downward bag-like foreign matter collecting portion 15a, The foreign matter having a large specific gravity is collected by the foreign matter collecting section 15a.
Pressed to. As a result, foreign matter having a high specific gravity can be removed.

Further, in FIG. 3, foreign matter such as cotton dust having a lower specific gravity than the refrigerating machine oil 10 is produced when the foreign matter such as cotton dust rises along the inner wall of the oil supply passage 4b of the crankshaft 4.
Gather near the surface of the oil film 10a. Therefore, it is difficult for the foreign matter collecting unit 15a to catch such foreign matter.

Therefore, in this embodiment, the refrigerating machine oil 10 sucked up to the lower end of the oil supply passage 4b is supplied to the oil supply passage 4b as shown in FIGS. The foreign matter collecting net 19 having a net attached to a ring that is a material that floats on the oil surface and has a shape that obstructs the flow near the surface of the upward flow of the refrigerating machine oil 10 is provided in the portion that is going to rise along the inner wall of the ing. Hereinafter, this point will be described with reference to FIG.

FIG. 5 is an enlarged vertical cross-sectional view showing the lower end portion of the crankshaft 4 in FIGS. 1 and 3, 15b is a notch, and 15c is a rod-like member, which corresponds to the above-mentioned drawings. Are denoted by the same reference numerals and redundant description will be omitted.

In the figure, at the lower end of the twist plate 15 for refueling, two cuts 15b are provided with the rod-shaped body 15c as a boundary. The rod-shaped body 15c has a bag-shaped net fixed to a ring formed of a material that floats on the refrigerating machine oil 10 and blocks the flow of the refrigerating machine oil 10 so that the rod-shaped body 15c can freely move up and down. A collection net 19 is attached.

In the stopped state, the refrigerating machine oil 10 has entered the lower portion of the oil supply passage 4b, but the cutout portion 15b is
The lower end of the twist plate 15 for refueling is cut to a depth such that it does not sink into the refrigerator oil 10.
Therefore, in this state, the foreign matter collection net 19 floats on the refrigerating machine oil 10 above the cut portion 15b. At this time, of course, light foreign matter such as cotton dust floats on the surface of the refrigerating machine oil 10 in the oil supply passage 4b.

When the operation is started and the crankshaft 4 rotates, the refrigerating machine oil 10 also rotates in the oil supply passage 4b by the oil supply piece 14 and a centrifugal force acts, and in the oil supply passage 4b, The surface of the refrigerating machine oil 10 has a parabolic shape so that the central portion side retracts and the wall surface side rises, and the refrigerating machine oil 10 forms an oil film along the wall surface of the oil supply passage 4b while forming such a surface. 10
It becomes a and rises.

As described above, the refrigerating machine oil 10 rotates, but at this time, the ring of the foreign matter collecting net 19 obstructs the flow thereof, and the refrigerating machine oil 10 around this ring obstructs the flow thereof. As shown by, it flows into the foreign matter collection net 19. Along with this, the light foreign matter floating on the surface of the refrigerator oil 10 also collects the foreign matter collecting net 1
It will flow into 9 and be captured by this.

In this way, it is possible to collect both foreign matter having a higher specific gravity and lighter foreign matter than the refrigerating machine oil 10, and the foreign matter mixed in the refrigerating machine oil 10 is caught between the crankshaft 4 and the main bearing 6 and the auxiliary bearing 7. Can be suppressed from entering the sliding part of
It is possible to prevent the sliding portion from being locked and improve the reliability of the compressor.

[0045]

As described above, according to the present invention,
In the vertical rotary compressor, it is possible to prevent foreign matter from entering each sliding portion and prevent the occurrence of lock and the like, thereby improving the reliability of the compressor.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing a main part of an embodiment of a vertical rotary compressor according to the present invention.

FIG. 2 is a diagram showing an operation of removing foreign matter that has entered the oil supply hole for the vane in FIG.

FIG. 3 is a diagram showing a foreign matter collecting unit in FIG. 1.

FIG. 4 is an enlarged view showing a downward bag-shaped foreign matter collecting unit in FIG.

5 is an enlarged view showing the foreign substance collecting net in FIG. 3. FIG.

FIG. 6 is a vertical cross section showing an example of a conventional vertical rotary compressor.

FIG. 7 is a cross-sectional view taken along the line AA in FIG.

8 is a diagram showing an oil supply structure for each sliding portion in the vertical rotary compressor shown in FIG.

[Explanation of symbols]

 1 airtight container 2 cylinder 2a vane slot 2b cylinder chamber 2c suction chamber 2d compression chamber 3 roller 4 crankshaft 4a eccentric part 4b oil supply passage 4c lateral hole 5 vane 5a notch 6 main bearing 6a oil supply hole 7 auxiliary bearing 8 rotor 9 fixed Child 10 Refrigerator oil 10a Oil film 11 Electric motor part 12 Compression mechanism part 14 Oil supply piece 15 Twist plate for oil supply 15a Downward bag-like foreign matter collection part 15b Cut part 15c Rod-like body 16 Spring 17 Discharge pipe 18a, 18b Communication hole 19 Foreign matter Collection net

Claims (3)

[Claims] 1. Refrigerating machine oil is stored in a lower part in a closed container,
The closed container has a structure in which an electric motor unit is housed on the upper side and a compression mechanism unit is housed on the lower side by connecting them to each other by a crankshaft. The compression mechanism unit closes an internal space of the cylinder and the cylinder. A main bearing and a sub-bearing that form a chamber and support the crankshaft, a roller that revolves around the eccentric part of the crankshaft in the cylinder, and a cylinder chamber that is always in contact with the outer periphery of the roller. Is divided into a low-pressure suction chamber and a high-pressure compression chamber, and a vane that reciprocates following the revolving motion of the roller, and the refrigerating machine oil to the sliding portion between the main bearing and the vane. A vertical rotary compressor having an oil supply hole provided in the main bearing for oil supply, wherein the vane is provided with a notch so as to communicate with the oil supply hole provided in the main bearing. Rotary compressor. 2. Refrigerating machine oil is stored in a lower part in a closed container,
An electric motor section is connected to the upper side of the airtight container, and a compression mechanism section is connected to the lower side by crankshafts, and an oil supply piece is provided at the lower end of the crankshaft and an oil supply passage of the crankshaft. And a twist plate for refueling are provided respectively, and as the crankshaft rotates, the refrigerating machine oil is sucked up into the refueling passage by the refueling piece and the twist plate for refueling and is supplied to each sliding portion. In the vertical rotary compressor configured as described above, a downward foreign matter collecting portion is provided at a position of the twisting plate for refueling that comes into contact with the inner wall of the oil feeding passage, and the refrigerating machine oil mixed in the refrigerating machine oil is provided by the foreign matter collecting portion. The vertical rotary compressor is characterized in that it can remove foreign matter having a larger specific gravity than that of the vertical rotary compressor. 3. Refrigerating machine oil is stored in the lower part in a closed container,
An electric motor section is connected to the upper side of the airtight container, and a compression mechanism section is connected to the lower side by crankshafts, and an oil supply piece is provided at the lower end of the crankshaft and an oil supply passage of the crankshaft. And a twist plate for refueling are provided respectively, and as the crankshaft rotates, the refrigerating machine oil is sucked up into the refueling passage by the refueling piece and the twist plate for refueling and is supplied to each sliding portion. In the vertical rotary compressor thus configured, a foreign matter collecting net that floats on the refrigerating machine oil is provided at the lower end of the refueling twist plate, and the foreign matter collecting on the refrigerating machine oil can be eliminated by the foreign matter collecting net. A vertical rotary compressor characterized in that