CN116241462A - Helium screw compressor oil circuit structure - Google Patents

Helium screw compressor oil circuit structure Download PDF

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Publication number
CN116241462A
CN116241462A CN202310084063.9A CN202310084063A CN116241462A CN 116241462 A CN116241462 A CN 116241462A CN 202310084063 A CN202310084063 A CN 202310084063A CN 116241462 A CN116241462 A CN 116241462A
Authority
CN
China
Prior art keywords
rotor
oil
screw compressor
filling port
helium
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202310084063.9A
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Chinese (zh)
Inventor
程立新
江涛
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujian Snowman Compressor Co ltd
Original Assignee
Fujian Snowman Compressor Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fujian Snowman Compressor Co ltd filed Critical Fujian Snowman Compressor Co ltd
Priority to CN202310084063.9A priority Critical patent/CN116241462A/en
Publication of CN116241462A publication Critical patent/CN116241462A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C18/12—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C18/14—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
    • F04C18/16—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/02—Lubrication; Lubricant separation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/02—Lubrication; Lubricant separation
    • F04C29/021—Control systems for the circulation of the lubricant
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/02—Lubrication; Lubricant separation
    • F04C29/028—Means for improving or restricting lubricant flow
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/04—Heating; Cooling; Heat insulation

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)

Abstract

According to the oil path structure of the helium screw compressor, the first rotor oil injection port is arranged in the air suction closed area, oil injection is carried out near the position of the rotor when the rotor begins to compress, so that the optimal cooling and sealing effect can be achieved, two oil injection ports in the rotor shell are sprayed into the rotor cavity in a mist mode for lubricating, cooling and sealing the male and female rotors, and part of heat is taken away. Under the same oil-gas mass ratio, the volumetric efficiency of the helium screw compressor adopting the two-point vaporific oil injection structure is improved by about 3% compared with that of the helium screw compressor adopting the single-point columnar oil injection structure.

Description

Helium screw compressor oil circuit structure
Technical Field
The invention relates to the field of compressor cooling and sealing, in particular to a helium screw compressor oil path structure.
Background
Compared with the traditional refrigeration screw compressor, the helium screw compressor has the double technical problems of sealing and cooling. The existing helium screw compressor oil way structure has poor cooling performance, and due to the adoption of a single-point columnar oil injection structure, a large amount of leakage of helium from a thinner sealing position of an oil film easily occurs, so that the tightness of the oil way structure is poor.
Disclosure of Invention
First, the technical problem to be solved
In order to solve the problems in the prior art, the invention provides the oil circuit structure of the helium screw compressor, which can ensure that the leakage amount of helium in the high-speed running process of the helium screw compressor is as small as possible, and can effectively reduce the temperature of a rotor assembly and the temperature of exhaust.
(II) technical scheme
In order to achieve the above purpose, the invention adopts the following technical scheme:
a helium gas screw compressor oil path structure comprises a rotor shell;
the rotor shell is provided with a first rotor oil filling port and a second rotor oil filling port, and the first rotor oil filling port is positioned in an air suction closing area;
the first rotor oil filling port and the second rotor oil filling port are respectively communicated with an atomization oil filling port, and the atomization oil filling port is positioned in the rotor shell.
(III) beneficial effects
The invention has the beneficial effects that: through setting up first rotor oiling mouth and being located the closed region of breathing in, carry out the oil spout near the position when the rotor just begins to compress can reach best cooling and sealed effect, inside two oil spout mouthfuls of rotor casing are spouted in the rotor intracavity with vaporific, be used for the lubrication of negative and positive rotor, cooling and seal, and take away partial heat, compare with traditional single-point columnar oil spout structure, adopt two oil spout mouthfuls to spout simultaneously can make negative and positive rotor contact line sealing place, negative and positive rotor high pressure side sealing place and the oil film of sealing place between rotor and the casing wall more even, thereby avoided helium to take place a large amount of leakage from the thinner sealing place of oil film, sealing performance's change can directly influence helium screw compressor's volumetric efficiency. Under the same oil-gas mass ratio, the volumetric efficiency of the helium screw compressor adopting the two-point vaporific oil injection structure is improved by about 3% compared with that of the helium screw compressor adopting the single-point columnar oil injection structure.
Drawings
FIG. 1 is a schematic front view of an oil circuit configuration of a helium screw compressor according to an embodiment of the present invention;
fig. 2 is a schematic back view of an oil circuit structure of a helium screw compressor according to an embodiment of the present invention.
[ reference numerals description ]
1. An air intake housing;
11. a shaft seal oil filling port; 12. a male rotor low-pressure side bearing oil filling port; 13. an oil filling port of the balance piston; 14. a female rotor bearing oil filling port; 15. the female rotor bearing high pressure side;
2. a rotor housing;
21. a first rotor oil filling port; 22. a second rotor oil filling port;
3. an exhaust housing;
31. the high-pressure side bearing of the male rotor is provided with an oil filling port.
Detailed Description
The invention will be better explained by the following detailed description of the embodiments with reference to the drawings.
Example 1
Referring to fig. 1 and 2, a helium screw compressor oil path structure includes a rotor housing 2;
the rotor shell 2 is provided with a first rotor oil filling port 21 and a second rotor oil filling port 22, and the first rotor oil filling port 21 is positioned in an air suction closing area;
the first rotor oil filling port 21 and the second rotor oil filling port 22 are respectively communicated with an atomization oil injection port, and the atomization oil injection ports are positioned in the rotor housing 2.
The first rotor oil filling port 21 and the second rotor oil filling port 22 are oppositely arranged on two side surfaces of the rotor housing 2.
The first rotor oil filling port 21 is positioned at the position of the suction closure area, and the internal volume ratio is 1-1.05.
The oil injected from the first rotor oil injection port 21 and the second rotor oil injection port 22 is used for lubricating, cooling and sealing the rotor.
Specifically, a first rotor oil injection port 21 is provided in the helium screw compressor near the suction closure region (internal volume ratio vi=1.0 to 1.05), and the oil injected by this port belongs to the "cooling oil" for lubricating, cooling and sealing the rotor. In order to improve the cooling and sealing effects of the rotor, a rotor oil injection port is additionally arranged on the back surface of the rotor shell 2, the two oil injection ports are communicated with the two oil injection ports, and cooling oil is sprayed into the rotor cavity in a mist form through the oil injection ports. Practice shows that when the rotor shell 2 is further provided with the oil filling ports and the oil injection ports (more than 2), the rigidity and the strength of the rotor shell 2 can be obviously reduced, large deformation can be generated to generate leakage and even cracking when a hydraulic test is carried out, and the cooling and sealing effects of the rotor are not obviously improved, so that the rotor shell 2 is provided with 2 oil filling ports and 2 oil injection ports, which is the current optimal scheme.
Also comprises an air inlet shell 1;
the air inlet shell 1 is communicated with one end of the rotor shell 2;
the suction end shaft seal, the male rotor low pressure side bearing and the balance piston of the intake housing 1 are respectively provided with an oil filler port, and the suction end shaft seal oil filler port 11 and the male rotor low pressure side bearing oil filler port 12 are communicated through an internal flow passage (the broken line for connecting the suction end shaft seal oil filler port 11 and the male rotor low pressure side bearing oil filler port 12 in fig. 1 indicates the internal flow passage).
In particular, practical experience shows that the oil supply circuit of the suction end shaft seal and the male rotor low-pressure side bearing is easier to break down relative to other oil supply circuits, so that the two oil injection ports are arranged at the shaft seal and the male rotor bearing and are communicated through the inner flow passage of the shell, and the oil supply reliability of the shaft seal and the bearing can be improved; the oil supply loops of the bearings at the two ends of the low pressure side and the high pressure side of the female rotor are not easy to fail, so that the reliability of oil supply can be met by only needing one oil filling port and communicating the two bearings through the flow passage in the shell.
A female rotor bearing oil filling port 14 is arranged at the low-pressure side female rotor bearing of the air inlet shell 1;
the female rotor bearing oil fill port 14 communicates the female rotor bearing high pressure side 15 and low pressure side through an internal flow passage (the broken lines for the female rotor bearing oil fill port 14 and female rotor bearing high pressure side 15 in fig. 2 represent internal flow passages).
Specifically, by providing the low-pressure side bearing oil filling port of the female rotor, the effect of lubricating two places by one hole is achieved by communicating to the high-pressure side bearing of the female rotor through the housing inner flow passage.
The oil injected from each oil injection port provided in the intake housing 1 is used for lubrication and cooling.
Further comprising an exhaust housing 3;
the male rotor high pressure side bearing of the exhaust housing 3 is provided with a male rotor high pressure side bearing oil filler port 31.
The oil injected from the male rotor high-pressure side bearing oil injection port 31 is used for lubrication and cooling.
The cooling, sealing effect and volumetric efficiency of the helium screw compressor can be improved by reasonably arranging the bearing, the shaft seal and the balance piston oil filling port 13, and the oil filling port and the oil injection port at the rotor on the shell of the compressor body, and the opening mode of the oil filling port is 4-2-1, namely the air inlet shell 1 is provided with 4 oil filling ports; 2 oil injection ports are formed in the rotor shell 2, and 2 oil injection points are arranged for carrying out atomized oil injection in the rotor cavity; the exhaust casing 3 is provided with 1 oil filling port, so that the exhaust casing 3 can have high enough strength and rigidity when bearing the gas pressure of the high pressure side. The gas pressure at the inlet is low and therefore is referred to as the low pressure side, and the gas pressure at the outlet after compression is high and therefore the low pressure side of the rotor refers to the side of the rotor end face close to the inlet and the high pressure side of the rotor refers to the side of the rotor end face close to the outlet.
The injection position of the helium screw compressor is at a VI (internal volume ratio) value of 1.0-1.05, namely, the optimal cooling and sealing effect can be achieved by injecting oil near the position when the rotor begins to compress, compared with the refrigeration and process gas compressor, the injection is carried out at a position with a larger VI value of 1.3-1.4, more oil can be injected into the helium screw compressor by injecting oil at a smaller VI value, the atomization capacity of the oil can be obviously improved by increasing the injection quantity, thus the very good cooling and sealing effect can be achieved, and the volumetric efficiency of the compressor can be improved.
The working principle of the invention is as follows:
the oil enters the helium screw compressor through two paths, wherein one path is used as 'functional oil' to enter the air inlet shell 1 and the air outlet shell 3 respectively, and is used for lubricating and cooling functional components such as shaft seals, bearings, balance pistons and the like, and taking away part of heat of the functional components. And the other path is used as cooling oil to be sprayed into the rotor cavity in a mist form through two oil spray ports in the rotor shell 2 for lubricating, cooling and sealing the male rotor and the female rotor and taking away part of heat of the rotor and helium. Compared with the traditional single-point columnar oil injection structure, the two oil injection ports can simultaneously inject oil to enable oil films at the contact line sealing position of the male and female rotors, the high-pressure side sealing position of the male and female rotors and the sealing position between the rotors and the shell wall to be more uniform, so that a large amount of leakage of helium from the thinner sealing position of the oil films is avoided, and the volumetric efficiency of the helium screw compressor can be directly influenced by the change of sealing performance. Under the same oil-gas mass ratio, the volumetric efficiency of the helium screw compressor adopting the two-point vaporific oil injection structure is improved by about 3% compared with that of the helium screw compressor adopting the single-point columnar oil injection structure.
The foregoing description is only illustrative of the present invention and is not intended to limit the scope of the invention, and all equivalent changes made by the specification and drawings of the present invention, or direct or indirect application in the relevant art, are included in the scope of the present invention.

Claims (9)

1. The oil path structure of the helium gas screw compressor is characterized by comprising a rotor shell;
the rotor shell is provided with a first rotor oil filling port and a second rotor oil filling port, and the first rotor oil filling port is positioned in an air suction closing area;
the first rotor oil filling port and the second rotor oil filling port are respectively communicated with an atomization oil filling port, and the atomization oil filling port is positioned in the rotor shell.
2. The helium screw compressor oil circuit structure of claim 1, wherein the first rotor oil inlet and the second rotor oil inlet are disposed opposite to each other on both sides of the rotor housing.
3. The helium screw compressor oil circuit structure of claim 1, wherein said first rotor oil injection port is located at an internal volume ratio of 1-1.05 at the suction closure region.
4. The helium screw compressor oil circuit structure of claim 1, wherein the oil injected from the first rotor oil injection port and the second rotor oil injection port is used for lubricating, cooling and sealing the rotor.
5. The helium screw compressor oil circuit structure of claim 1, further comprising an air intake housing;
the air inlet shell is communicated with one end of the rotor shell;
and the air suction end shaft seal, the male rotor low-pressure side bearing and the balance piston of the air inlet shell are respectively provided with an oil filling port, and the air suction end shaft seal oil filling port and the male rotor low-pressure side bearing oil filling port are communicated through an internal runner.
6. The helium gas screw compressor oil circuit structure according to claim 5, wherein a female rotor bearing oil filling port is arranged at a low-pressure side female rotor bearing of the air inlet shell;
and the female rotor bearing oil filling port is communicated with the high-pressure side and the low-pressure side of the female rotor bearing through an internal runner.
7. The helium gas screw compressor oil circuit structure according to claim 6, wherein oil injected from each oil injection port provided on the gas inlet housing is used for lubrication and cooling.
8. The helium screw compressor oil circuit structure of claim 1, further comprising a vent housing;
the high-pressure side bearing of the male rotor of the exhaust shell is provided with a high-pressure side bearing oil filling port of the male rotor.
9. The helium screw compressor oil circuit structure according to claim 8, wherein said male rotor high pressure side bearing oil injection port is injected with oil for lubrication and cooling.
CN202310084063.9A 2023-02-07 2023-02-07 Helium screw compressor oil circuit structure Pending CN116241462A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310084063.9A CN116241462A (en) 2023-02-07 2023-02-07 Helium screw compressor oil circuit structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310084063.9A CN116241462A (en) 2023-02-07 2023-02-07 Helium screw compressor oil circuit structure

Publications (1)

Publication Number Publication Date
CN116241462A true CN116241462A (en) 2023-06-09

Family

ID=86629040

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310084063.9A Pending CN116241462A (en) 2023-02-07 2023-02-07 Helium screw compressor oil circuit structure

Country Status (1)

Country Link
CN (1) CN116241462A (en)

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