JPH0518387A - Lubrication pump device for compressor - Google Patents

Abstract

PURPOSE:To reduce a suction amount of foreign matter and an oil leakage amount by using an oil suction pipe whose suction port is opened at a position slightly away from a bottom of an oil reservoir, by making this oil suction pipe rotatable and by making a delivery part with the pump rotor side non- contact with a micro clearance. CONSTITUTION:A thrust supporting body 68 which is a static member is rotatably supported through a rolling bearing 68a in the state where an oil pipe part 32 and a bottom wall of an oil reservoir is kept non-contact. When a compressor is inclined by vibration, fluctuation and so on, an oil suction pipe 3 is rotated around a straight pipe part 31 as axis corresponding to the inclination, a bent pipe part 32 is directed downward to dip a suction port 32a for oil deep in oil in the oil reservoir 50. Moreover, as this suction port 32a is not in contact with the bottom of the oil reservoir, a suction amount of foreign matter collected at the bottom of the oil reservoir can be reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compressor oil supply pump device which is provided at an end of a drive shaft of a compressor and can withstand use in an environment where a ship or the like is vibrating or rocking. .

[0002]

2. Description of the Related Art Conventionally, as disclosed in Japanese Utility Model Laid-Open No. 2-114794 and as shown in FIG. 6, an oil supply pump P is provided at the end of a drive shaft D that drives a compression element C, and a lubricating oil is supplied from an oil sump O to the lubricating oil. A pipe for sucking up the oil is constituted by a flexible tube F, the tube F is connected to the oil supply pump P side so as not to rotate together with the drive shaft D, and a weight W is fixed to the lower end portion of the tube F so that the compressor W According to the inclination, the lower end of the tube F is moved to a deep oil portion of the oil sump O so that it is possible to prevent the oil suction port from being exposed and obstructing the oil suction.

[0003]

However, in the above, the flexible tube F is used as the pipe for sucking the oil, and the weight W is provided at the lower end of the pipe so that the suction port of the oil can be changed according to the inclination of the compressor. Although it can be moved into deep oil in the oil sump, there is no structural ingenuity in the part that connects the flexible tube F that does not rotate with the drive shaft D to the oil supply pump P side that rotates with the drive shaft D. Because there is no
When the gap between the connecting portion between the tube F and the oil supply pump P becomes large, oil leaks from this portion, and the oil sucked up into the tube F cannot be delivered to the oil supply pump P well, and Tube F and refueling pump P
When and are brought into close contact with each other, the rotation of the drive shaft D causes the tube F to rotate together due to frictional force to expose the oil suction port, which causes a problem of poor oil supply.

Further, in the above-mentioned structure, since the oil suction port provided at the lower end of the tube F is always opened by the weight W in contact with the bottom of the oil sump O, the dust accumulated in the bottom is sucked in. There is also a problem that the lubrication pump P and the sliding portions of the drive shaft D, the compression element C, and the like connected via the pump P are likely to cause abnormal wear or the like due to the biting of dust, which lowers the reliability.

An object of the present invention is to use an oil suction pipe whose suction port is opened at a position slightly distant from the bottom of the oil sump, to make this oil suction pipe rotatable, and to connect the oil suction pipe and the pump rotor side. The non-contact type of the delivery part with and through the small gap can reduce the amount of dust suction and the amount of oil leakage, and can improve the followability of the oil suction pipe according to the inclination of the compressor to prevent vibration and vibration. An object of the present invention is to provide an oil supply pump device for a compressor, which is capable of responding favorably to changes in the oil level due to rocking or the like.

[0006]

In order to achieve the above object, the present invention has a pump rotor 1 attached to an end portion of a drive shaft for driving a compression element so that a lubricating oil is accumulated in the drive shaft to the inside of the drive shaft. In an oil supply pump device for a compressor that pumps oil into an oil supply passage provided in, a straight pipe portion 31 extending in the axial direction of the drive shaft and a curved pipe portion 32 extending in a direction different from the straight pipe portion 31 are provided. A connection port 31a corresponding to the oil intake port 1a opening at the pump rotor 1 at the end of the pipe section 31.
Further, the oil suction pipe 3 having the suction ports 32a opening to the oil reservoir is formed at the end of the curved pipe portion 32, and the straight pipe portion 31 of the oil suction pipe 3 is formed by the curved pipe portion. 32 and the bottom wall portion of the oil reservoir are rotatably supported by a stationary member in a state of being kept in non-contact with each other, and the straight pipe portion 31 is brought into contact with an abutting surface provided on the stationary member to connect the connection port. 31a and oil inlet 1
The regulation body 4 is provided to keep the space between the space a and the space a small.

Further, with the above-mentioned structure, in order to further reduce the leakage of the oil transfer portion between the oil suction pipe 3 and the pump rotor 1, the projection that protrudes into the connection port 31a of the straight pipe portion 31 in the pump rotor 1. 18 was provided, and the oil suction port 1 a was opened at the bottom of the protrusion 18.

[0008]

According to the inclination of the compressor, the oil suction pipe 3 rotates about its straight pipe portion 31 as an axis, and the curved pipe portion 32 is directed downward, so that the oil suction port 32a is placed in deep oil in the oil sump. Can be soaked. Moreover, since the suction port 32a does not contact the bottom portion, the amount of dust suctioned can be reduced. Further, since the connection port 31a and the oil intake port 1a on the pump rotor 1 side are held in non-contact with each other by the restricting body 4 through the minute gap, it is possible to reduce the leakage amount at the time of oil delivery and to compress the oil. The oil suction pipe 3 can be smoothly rotated according to the inclination of the machine.

Further, by providing the protrusion 18, the amount of leakage between the connection port 31a and the oil suction port 1a can be further reduced.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 5 shows a scroll type compressor equipped with an oil supply pump device according to the present invention, which is a hermetic casing 5 having a body 51, a top 52 and a bottom 53, and an oil sump 50 at the bottom. A housing 6 composed of an upper housing 61, a lower housing 62, and a bottom fixing plate 63 is disposed inside, and a scroll 72 is projectingly provided on an end plate 71 above the casing 5 through the housing 6. A compression element 78 having a fixed scroll 7 and a movable scroll 8 having a scroll body 82 projecting from an end plate 81 is installed inside, and a motor 90 to which a drive shaft 9 is connected is installed below the compression element 78 and is taken in from a suction pipe 54. The intake gas is filtered by the filter 64.
After passing through the motor 90, the gas is taken into the compression chamber 73 from the outer periphery of the spiral, and the compressed discharge gas is discharged from the discharge hole 74 at the center of the spiral to the outside through the discharge chamber 55 and the oil separator 56 and the discharge pipe 57. I try to take it out.

An oil supply pump device 100 is provided at the lower end of the drive shaft 9, and an oil supply passage 9 is provided inside the drive shaft 9.
Oil is pumped to 1, 92, the lower main bearing 93, the upper main bearings 94, 95, the pin bearing 83, the Oldham ring 96.
The lubricating oil is supplied to the sliding groove and the compression chamber 73.

As shown in FIGS. 1 and 2, the oil supply pump device 100 has a boss portion 11 fitted to the drive shaft 9 and a collar portion 1 connected to the lower end of the drive shaft 9 via pins 97 and 98.
2 and the pin portion 13 having an eccentric center with respect to the drive shaft 9.
A pump rotor 1 integrally formed with a pump rotor 1, and a yoke 20 that defines a pump chamber 10 by opening a long hole 20 in which two semicircles are connected by a straight line portion in the central portion and fitting the outer peripheral portion of the pin portion 13. Body 2
1 and a yoke 2 integrally provided with a pair of keys 22 and 22 that slide in key grooves 65 and 65 provided in the lower housing 62. As the pump rotor 1 rotates, the suction passage 1
Oil is introduced into the pump chamber 10 through the pump chamber 4, and the oil introduced into the pump chamber 10 is pumped up into the oil supply passages 91 and 92 through the discharge passage 15 and the tapered centrifugal pump portion 16 continuous with the discharge passage 15. There is. The pump rotor 1 is a spring 1
It is pressed from the upper side via 7, and the bottom portion of the pump rotor 1 is supported by a thrust support body 68 which is connected to the lower housing 62 with a bolt 67, with a sheet-like thrust plate 66 interposed therebetween.

With the above structure, the straight pipe portion 31 extending in the axial direction of the drive shaft 9 and the curved pipe portion 32 extending in a direction different from the straight pipe portion 31 are connected to each other in an L shape through the engaging portion 33. , A connection port 31a corresponding to the oil intake port 1a serving as the inlet part of the suction passage 14 at the end of the straight pipe part 31, and a suction port opening to the oil sump 50 at the end part of the curved pipe part 32. The oil suction pipes 3 provided with the respective 32a are formed, and the straight pipe portion 31 of the oil suction pipe 3 is kept stationary with the curved pipe portion 32 and the bottom wall portion of the oil reservoir being kept in non-contact with each other. It is rotatably supported on the thrust support body 68 serving as a member via a rolling bearing 68a.

Further, an insertion hole 68b for receiving the upper side of the straight pipe portion 31 is formed in the thrust support 68 which constitutes a stationary member, and a large-diameter recess 68d which is continuous with the insertion hole 68 via a step 68c. And the step portion 68 is provided at the intermediate portion of the straight pipe portion 31 so as to project toward the concave portion 68d.
The upper end portion is brought into contact with an abutting surface utilizing c to keep the gap between the connection port 31a and the oil suction port 1a at a minute gap of a few millimeters of a comma.
To provide.

Thus, when the compressor is tilted due to vibration or rocking, the oil suction pipe 3 rotates about the straight pipe portion 31 as an axis according to the tilt, and the curved pipe portion 32 is directed downward. Then, the oil suction port 32a can be immersed in the deep oil in the oil sump 50. Moreover, since the suction port 32a does not come into contact with the bottom portion of the oil sump 50, it is possible to reduce the amount of dust sucked into the bottom portion of the oil sump 50. Further, since the connection port 31a and the oil intake port 1a on the pump rotor 1 side are kept in non-contact with each other through a minute gap, it is possible to reduce the leakage amount at the time of oil delivery and to rotate the straight pipe part 31. The operation can be smoothed, and the followability of the oil suction pipe 3 can be improved according to the inclination of the compressor.

By the way, in the above-mentioned embodiment, the regulating body 4 is constituted by the collar body 41, which is integrally provided in the intermediate portion of the straight pipe portion 31 and inside the thrust support body 68 which constitutes the stationary member. Although it is arranged to abut on the portion 68c, as shown in FIG. 3, the annular plate 42, which makes contact with this lower end surface as an abutting surface, is attached to the lower end of the rolling bearing 68a located below the thrust support body 68. Alternatively, the plate 42 may be locked to the straight pipe portion 31 via a locking body 43 composed of a C-shaped retaining ring, and the annular plate 42 and the locking body 43 may constitute the restricting body 4. . In addition, in the case of FIG.
The thrust support 6 is provided on the upper end of the straight straight pipe portion 31.
8 is provided with a flange portion 31b that projects into the recessed groove 68e. The flange portion 31b prevents the straight pipe portion 31 from slipping out to the lower side, and the connection port 31a and the oil suction port. The seal margin in the gap with 1a is enlarged.

Further, in the above embodiment, the upper end of the straight pipe portion 31 is made to face the lower surface of the flat pump rotor 1, but as shown in FIG. Protrusion 1 that projects into the inside of the connection port 31a that opens at 31
8 may be provided to open the oil suction port 1a at the bottom of the projection 18. In this case, oil can be satisfactorily delivered from the connection port 31a to the oil suction port 1a. The amount of oil leakage can be further reduced in combination with the fact that the space between 31a and the oil suction port 1a is held in a minute gap.

[0018]

As described above, according to the present invention, when the compressor tilts due to vibration, rocking, or the like, the suction port 32a of the oil suction pipe 3 is set in the oil deep in the oil reservoir according to the tilt. Since the suction port 32a is not in contact with the bottom wall portion of the oil sump, the suction amount of dust accumulated on the bottom wall portion of the oil sump can be reduced, and the oil suction pipe 3 and Since the oil delivery portion between the pump rotor 1 side and the pump rotor 1 side is not in contact via the minute gap, the amount of oil leakage at this delivery portion can be reduced and the followability of the oil suction pipe 3 can be improved. As a result, it is possible to secure good refueling as a whole in response to oil level fluctuations.

Further, since the pump rotor 1 is provided with the projection 18 projecting into the connection port 31a of the straight pipe portion 31 and the oil suction port 1a is opened at the bottom of the projection 18, the connection port 31a and the oil suction port 1a are formed. It is possible to further reduce the amount of oil leakage between and.

[Brief description of drawings]

FIG. 1 is a sectional view of essential parts showing a first embodiment of an oil supply pump device for a compressor according to the present invention.

FIG. 2 is a bottom view of the pump rotor portion.

FIG. 3 is a sectional view of a main part showing the second embodiment.

FIG. 4 is a sectional view of a main part showing the third embodiment.

FIG. 5 is a cross-sectional view of the entire compressor including the oil supply pump device.

FIG. 6 is a sectional view of a conventional example.

[Explanation of symbols]

1 pump rotor 3 oil suction pipe 4 regulatory bodies 1a Oil suction port 31 Straight pipe section 31a connection port 32 curved pipe section 32a suction port

Claims (2)

[Claims] 1. An oil supply pump device for a compressor, wherein a pump rotor 1 is attached to an end of a drive shaft for driving a compression element, and oil is pumped from an oil reservoir for storing lubricating oil to an oil supply passage provided inside the drive shaft. An oil suction provided with a straight pipe portion 31 extending in the axial direction of the drive shaft and a curved pipe portion 32 extending in a direction different from the straight pipe portion 31, and an end of the straight pipe portion 31 opening to the pump rotor 1. The connection port 31a corresponding to the port 1a,
At the end of the curved pipe portion 32, an oil suction pipe 3 is formed, which is provided with suction ports 32a opening to the oil reservoir.
The straight pipe portion 31 is rotatably supported by the stationary member in a state where the curved pipe portion 32 and the bottom wall portion of the oil reservoir are kept in non-contact with each other, and the straight pipe portion 31 is provided on the stationary member. A refueling pump device for a compressor, characterized in that a regulator 4 is provided which is in contact with the abutting surface and keeps a space between the connection port 31a and the oil suction port 1a at a minute gap. 2. The pump rotor 1 is provided with a connection port 3 of a straight pipe portion 31.
2. The oil supply pump device for a compressor according to claim 1, wherein a projection 18 is provided which projects into 1a, and an oil suction port 1a is opened at the bottom of this projection 18.