WO2016023318A1

WO2016023318A1 - Screw compressor and oil-separating barrel component thereof

Info

Publication number: WO2016023318A1
Application number: PCT/CN2014/095092
Authority: WO
Inventors: 杨侨明; 李日华; 张天翼; 刘华; 谭功胜; 蔺维君; 龙浩; 毕雨时; 彭延海; 许康
Original assignee: 珠海格力电器股份有限公司
Priority date: 2014-08-15
Filing date: 2014-12-26
Publication date: 2016-02-18
Also published as: CN104214096B; CN104214096A

Abstract

Disclosed is an oil-separating barrel component of a screw compressor, comprising: an oil-separating barrel (4), an end cover (401) being provided on an end part of the oil-separating barrel; an oil-separating filter screen (6), being provided in the oil-separating barrel and forming a separating chamber (402) with the end cover; and a stream guide assembly, wherein the stream guide assembly separates the separating chamber into an upper part and a lower part, and an isolating chamber (403) for accommodating an exhaust pipe (5) is also arranged in the stream guide assembly. The stream guide assembly is used to provide a centrifugal speed to the air stream, which is exhausted by the exhaust pipe, when leaving the stream guide assembly, such that the oil and the air are separated, and the separated refrigeration oil flows into an oil accommodating cavity via the clearance between the oil-separating barrel and the oil-separating filter screen. Further disclosed is a screw compressor having the oil-separating barrel assembly. The oil-separating barrel assembly can prevent the air stream from disturbing the separated refrigeration oil and avoid the problems that the oil-separating effect becomes poor and the oil level is not stable.

Description

Screw compressor and its oil sub-tank parts

The present application claims priority to Chinese Patent Application No. 201410404898.9, entitled "Spiral Compressor and Its Oil Barrel Parts", filed on August 15, 2014, the entire contents of which is incorporated herein by reference. in.

Technical field

The present invention relates to a screw compressor, and more particularly to a screw compressor that uses a spool to adjust a load and an oil sub-tank member.

Background technique

Screw compressors usually use a slide valve for load regulation. In the screw compressor, the spool valve is a moving part. In order to ensure stable operation, the spool valve is often arranged under the rotor in the design. However, the arrangement of such a lower slide valve often brings a new problem. Due to the lowering of the slide valve, the exhaust port at the exhaust housing has to be located below. The gas discharged from the exhaust pipe is separated from the refrigerant oil carried by the gas through the oil filter, and then discharged to the compressor through a shut-off valve. Since there is separated refrigerant oil at the bottom of the compressor oil drum, the gas discharged from the exhaust pipe that is too low will disturb the separated refrigerant oil, which will make the oil separation effect worse, the oil level unstable, and even the compressor. Oil supply difficulty

In the prior art, the exhaust pipe height is generally increased by the elbow to avoid the exhaust gas disturbing the oil level. If the elbow is integrally formed with the cavity, the compressor structure is complicated and the manufacturing is difficult, if it is separately set. Bend pipe, because the elbow can not be effectively fixed, it is easy to bring noise.

In addition, in order to prevent the splashing of the frozen oil at the bottom of the oil drum, the oil retaining rib is also installed on the side of the oil filter. The oil retainer is a cantilever structure, which is easy to cause vibration noise.

Summary of the invention

In view of the above-mentioned drawbacks existing in the prior art, the present invention provides an oil-distributing barrel component of a screw compressor, so that the screw compressor is isolated from the freezing oil deposition space, thereby preventing the airflow from disturbing the separated refrigeration oil and preventing oil from appearing. The problem of poor separation and unstable oil level.

In order to solve the above technical problem, the present invention provides an oil sub-tank component of a screw compressor, comprising: an oil sub-barrel, an end cover of the oil sub-barrel is provided; an oil filter screen is disposed in the oil-distributing drum, and Forming a separation chamber with the end cover; a flow guiding assembly that separates the separation chamber into upper and lower portions, and the flow guiding assembly is further provided with an isolation chamber for accommodating the exhaust pipe; The assembly is configured to impart a centrifugal velocity to the gas stream as it exits the flow conduit.

Preferably, the flow guiding assembly comprises: an arc-shaped retaining rib disposed in the separating cavity, one end fixedly connected to an inner side wall of the oil sub-bucket, and the arc-shaped retaining rib and the oil-distributing barrel An isolation cavity is formed between the inner side walls, and a nozzle of the exhaust pipe is disposed corresponding to the isolation cavity; a oil retaining rib is disposed at a lower portion of the separation cavity, and one end is fixedly connected to the inner side wall of the oil separation barrel, The other end is fixedly coupled to the outer side wall of the arcuate retaining rib away from the exhaust pipe.

Preferably, the flow guiding assembly further comprises an arc-shaped guiding rib, the connecting end of the guiding rib is arc-connected to the free end of the curved retaining rib, and the free end of the guiding rib The extending direction of the curved baffle extends in the opposite direction.

Preferably, the flow guiding rib is disposed concentrically with the oil sub-barrel.

Preferably, the flow guiding rib is disposed concentrically with the oil barrel and is tangent to the curved flow rib.

Preferably, the angle between the end point of the free end of the flow guiding rib and the center of the oil barrel and the straight line extending vertically downward from the center of the oil barrel is 60 to 120°.

Preferably, the angle between the end point of the free end of the flow guiding rib and the center of the oil barrel and the straight line extending vertically downward from the center of the oil barrel is 90°.

Preferably, the exhaust pipe protrudes into the isolation cavity, the arc-shaped baffle is disposed concentrically with the exhaust pipe, and the arc-shaped baffle is clearance-fitted with the exhaust pipe.

Preferably, the diameter of the curved retaining rib is 9-20 mm larger than the diameter of the exhaust pipe.

Preferably, the oil retaining rib is horizontally disposed, and the oil retaining rib is the same as the center height of the curved retaining rib.

Preferably, the oil slinger has a maximum distance from the inner wall of the oil drum to 0.25 to 0.3 times the inner diameter of the oil drum.

Preferably, an oil passage gap is disposed between the oil retainer and the oil filter.

According to the embodiment of the present invention, since the flow guiding assembly separates the separation chamber into upper and lower portions, the flow guiding assembly is further provided with an isolation chamber for accommodating the exhaust pipe, and can enter the isolation when the gas in the exhaust pipe is discharged. Inside the chamber, and flowing along the guide of the flow guiding assembly in the isolation chamber, thereby avoiding the downward flow of the air to the freezing oil at the dividing portion to disturb the freezing oil, and the flow guiding assembly is used for the airflow discharged from the exhaust pipe to leave the diversion flow. The assembly imparts a centrifugal velocity to the airflow, which allows the airflow to flow circumferentially along the oil drum, enhancing the oil separation effect. Both ends of the slinger are fixedly connected, instead of the cantilever, it can also effectively avoid the noise generated by vibration.

DRAWINGS

1 is a schematic view showing the internal structure of an oil sub-bucket according to an embodiment of the present invention;

2 is a schematic structural view of an oil barrel assembly according to an embodiment of the present invention;

3 is a cross-sectional view of a barrel end of a compressor oil according to an embodiment of the present invention.

Description of the reference signs:

1. Oil retaining rib; 2. Curved retaining rib; 3. Guide rib; 4. Oil bucket; 401, end cap; 402, separation chamber; 403, isolation chamber; Net; 7, exhaust stop valve.

detailed description

The invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

1 is a schematic view showing the internal structure of an oil sub-tank according to an embodiment of the present invention, FIG. 2 is a schematic structural view of an oil sub-barrel assembly according to an embodiment of the present invention, and FIG. 3 is a cross-sectional view of a barrel end of a compressor oil according to an embodiment of the present invention. As shown in FIG. 1 , FIG. 2 and FIG. 3 , the oil sub-tank component of the screw compressor provided by the embodiment includes: an oil sub-tank 4 , an end cover 401 is disposed at an end of the oil sub-tank 4 , and an oil filter 6 is disposed at A separation chamber 402 is formed in the oil barrel 4 and between the end cover 401; a flow guiding assembly separates the separation chamber 402 into upper and lower parts, and the flow guiding assembly is further provided with an isolation for accommodating the exhaust tube 5. a 403; a flow guiding assembly for imparting a centrifugal velocity to the airflow when the airflow discharged from the exhaust pipe 5 exits the flow guiding assembly; the exhaust pipe 5 is disposed on the oil filtering screen 6; and the flow guiding assembly includes the curved retaining rib 2 And the oil retaining rib 1, the curved retaining rib 2 is disposed in the separating cavity 402, one end is fixedly connected to the inner side wall of the oil sub-bucket 4, the curved retaining rib 2 and the oil retaining rib 1 and the inner side wall of the oil sub-bucket 4 An isolation chamber 403 is formed, the opening of the isolation chamber 403 is upward, and the nozzle of the exhaust pipe 5 is disposed corresponding to the isolation chamber 403; the oil retaining rib 1 is disposed at a lower portion of the separation chamber 402, and one end is fixedly connected to the inner side of the oil barrel 4 On the wall, the other end is fixedly connected to the outer side wall of the arc-shaped retaining rib 2 away from the exhaust pipe 5, thereby forming The oil receiving chamber is satisfied that the refrigeration oil separated. The oil retaining rib 1 and the oil filter screen 6 are provided with an oil passage gap.

In the oil-distributing barrel part of the screw compressor of the present embodiment, the rib retaining rib 1, the curved retaining rib 2 and the guiding rib 3 are respectively added inside the oil sub-tank 4, wherein the oil retaining rib 1 is used to prevent the airflow from disturbing the oil. The frozen oil at the bottom of the barrel 4; the curved retaining rib 2 is docked with the exhaust pipe of the compressor to prevent the gas discharged from the exhaust pipe from being straight The flow direction is to the position where the deposited frozen oil is located; the guide rib 3 is used to guide the exhaust gas to flow upward, and to perform a centrifugal annular flow along the oil cylinder wall surface, so that the exhaust gas can achieve better oil and gas separation. There is a gap between the oil retaining rib 1 of the oil barrel 4 and the oil filter screen 6 in the axial direction of the oil sub-tank 4, so that the separated refrigerating oil flows through the gap to the bottom of the oil sub-bucket 4 into the oil-receiving chamber. In this embodiment, the exhaust gas flow process is: the air flow is discharged through the exhaust pipe 5, first entering the arc-shaped retaining rib 2 and the isolation cavity 403 formed between the oil retaining rib 1 and the inner wall of the oil sub-bucket 4, and then passing through the arc The flow guiding action of the baffle 2 and the guiding rib 3 flows along the inner wall of the oil sub-bucket 4 to form a centrifugal separation, and flows from the upper opening of the isolation chamber 403 to other portions of the separation chamber 402, in which the gas flow is achieved. The oil is separated, and the flow of the gas striking the oil retaining rib 1 also has a certain oil component effect. When the airflow passes through the oil filter screen 6 in the axial direction, the separated frozen oil flows into the oil permeable cavity through the gap between the oil drum 4 and the oil filter screen 6. The air flow passes through the oil filter screen 6 and is discharged through the exhaust cut valve 7.

In a preferred embodiment, the guide rib 3 is arranged in an arc shape, and the connecting end of the guiding rib 3 is curvedly connected to the free end of the curved retaining rib 2, and the free end of the guiding rib 3 is along the curved retaining rib 2 The extension direction extends in the opposite direction. The airflow is discharged through the exhaust pipe 5, enters the separation cavity 402 through the curved baffle 2, and flows upward along the circumferential wall of the oil sub-barrel through the guide rib 3, since the guide rib 3 is curved, the airflow leaves the guide rib 3 When the centrifugal speed can be obtained, a certain rotation separation effect is generated, and the airflow is circularly moved along the cavity wall in the separation chamber 402, thereby facilitating the separation of the gas and oil, and at the same time, the movement of the airflow can be regulated, and turbulence is not generated, and the flow is reduced. The noise.

Preferably, the flow guiding rib 3 is centered on the axial center of the oil drum 4; the guiding rib 3 is tangent to the curved retaining rib 2; the connection between the end point of the free end of the guiding rib 3 and the center of the oil barrel 4 is The angle between the straight lines extending vertically downward from the center of the oil barrel 4 is 60 to 120, and preferably, the angle is 90°. In order to ensure better airflow along the barrel wall of the oil sub-bucket 4, a stronger centrifugal force is generated to achieve greater gas-oil separation effect.

In a preferred embodiment, the exhaust pipe 5 projects into the isolation chamber 403, the arc-shaped retaining rib 2 is disposed concentrically with the exhaust pipe 5, and the curved baffle 2 is in clearance engagement with the exhaust pipe 5.

In a preferred embodiment, the diameter of the curved baffle 2 is 9 to 20 mm larger than the diameter of the exhaust pipe 5. In a further embodiment, the diameter of the curved baffle 2 is 10 mm larger than the diameter of the exhaust pipe 5. In order to ensure that the vibration of the exhaust pipe 5 is not transmitted to the oil drum 4, vibration noise is avoided.

Preferably, the oil retaining rib 1 is horizontally disposed, and the oil retaining rib 1 is the same as the center height of the curved retaining rib 2 . The maximum distance between the oil retaining rib 1 and the inner wall of the oil drum 4 is 0.25 to 0.3 times the inner diameter of the oil drum 4, and the separation chamber 402 for separating the gas and oil is given as large as possible while satisfying the sufficient oil chamber.

This embodiment also shows a screw compressor having the oil barrel member of any of the embodiments.

The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on differences from other embodiments, and the same or similar parts of the respective embodiments may be referred to each other.

The above is a preferred embodiment of the present invention, and it should be noted that those skilled in the art can make several improvements and retouchings without departing from the principles of the present invention. It is also considered to be the scope of protection of the present invention.

Claims

An oil barrel assembly for a screw compressor, comprising:

a oil barrel, the end of the oil barrel is provided with an end cover;

An oil filter screen disposed in the oil barrel and forming a separation chamber with the end cover;

a flow guiding assembly, the flow guiding assembly isolating the separation chamber into upper and lower portions, and the flow guiding assembly is further provided with an isolation chamber for accommodating the exhaust pipe;

The flow guiding assembly is configured to impart a centrifugal velocity to the gas stream as it exits the flow guiding assembly.
The oil drum assembly of a screw compressor according to claim 1, wherein said flow guiding assembly comprises:

An arc-shaped retaining rib disposed in the separating cavity, one end of which is fixedly connected to the inner side wall of the oil-diving barrel, and the arc-shaped retaining rib and the inner side wall of the oil-diving barrel form the isolation cavity, a nozzle of the exhaust pipe corresponding to the isolation cavity;

The oil retaining rib is disposed at a lower portion of the separation chamber, one end of which is fixedly connected to the inner side wall of the oil sub-bucket, and the other end of which is fixedly connected to the outer side wall of the arc-shaped retaining rib away from the exhaust pipe.
The oil drum component of a screw compressor according to claim 2, wherein said flow guiding assembly further comprises an arcuate flow guiding rib, and said connecting end of said guiding rib is curvedly connected to said curved blocking member The free end of the flow rib, the free end of the flow guiding rib extending in the opposite direction along the extending direction of the curved retaining rib.
The oil drum unit of a screw compressor according to claim 3, wherein the flow guiding rib is disposed concentrically with the oil sub-bucket.
The oil drum unit of a screw compressor according to claim 4, wherein said flow guiding rib is tangential to said curved flow rib.
The oil drum unit of a screw compressor according to claim 3, wherein a line between an end point of the free end of the flow guiding rib and a center of the oil barrel and a vertical downward extending from a center of the oil barrel The angle between the straight lines is 60 to 120°.
The oil drum unit of a screw compressor according to claim 6, wherein a line between an end point of the free end of the guide rib and a center of the oil barrel and a vertical direction from a center of the oil barrel The angle between the downwardly extending straight lines is 90°.
The oil drum unit of a screw compressor according to any one of claims 1 to 7, wherein the exhaust pipe projects into the isolation chamber, the curved retaining rib and the row The trachea is concentrically disposed, and the arc-shaped baffle is gap-fitted with the exhaust pipe.
The oil drum unit of a screw compressor according to claim 8, wherein the diameter of the curved retaining rib is 9 to 20 mm larger than the diameter of the exhaust pipe.
The oil drum unit of a screw compressor according to claim 8, wherein the oil retaining rib is horizontally disposed, and the oil retaining rib is the same as a center height of the curved retaining rib.
The oil drum component of a screw compressor according to claim 9, wherein a maximum distance of the oil retaining rib from an inner wall of the oil drum is 0.25 to 0.3 times an inner diameter of the oil cylinder.
The oil drum unit of a screw compressor according to any one of claims 1 to 6, wherein an oil passage gap is provided between the oil retainer and the oil filter.
A screw compressor comprising an oil sub-tank component, wherein the oil sub-tank component is an oil sub-tank component of the screw compressor according to any one of claims 1 to 12.