CN214887705U

CN214887705U - Single screw compressor sealing system and single screw compressor

Info

Publication number: CN214887705U
Application number: CN202120814268.4U
Authority: CN
Inventors: 卢茂庚; 白纯波; 周振华; 王小兵; 姚红杉; 廖伟生
Original assignee: Guangdong Alink Energy Equipment Co ltd
Current assignee: Guangdong Alink Energy Equipment Co ltd
Priority date: 2021-04-20
Filing date: 2021-04-20
Publication date: 2021-11-26
Anticipated expiration: 2031-04-20

Abstract

The utility model discloses a single screw compressor sealing system and single screw compressor, this single screw compressor sealing system includes: a housing provided with a first liquid ejection port; the screw is rotationally arranged on the shell; the two star wheels are rotatably arranged on the shell, are respectively arranged on two sides of the screw rod and are meshed with the screw rod; a compression cavity can be defined among the screw, the star wheel and the shell together; the liquid supply device is communicated with the compression cavity through a first liquid spraying port; and a liquid seal mechanism for sealing a gap between the screw and the shell is arranged between the screw and the shell. The liquid seal mechanism is arranged between the screw and the shell and used for sealing a gap between the screw and the shell, so that compressed gas is prevented from leaking, the liquid seal mechanism can ensure good sealing performance after long-term use, and the service life of the single-screw compressor is prolonged. The single-screw compressor comprises the single-screw compressor sealing system, and is good in sealing effect and long in service life.

Description

Single screw compressor sealing system and single screw compressor

Technical Field

The utility model relates to a compressor technical field especially relates to a single screw compressor sealing system and single screw compressor.

Background

The single-screw compressor is a meshing pair consisting of a screw and two plane star wheels which are symmetrically arranged and is arranged in a shell. When the single-screw compressor works, the screw and the star wheel rotate at a high speed relative to the shell, and certain gaps are needed between the screw and the shell and between the star wheel and the shell to ensure the normal work of the compressor. The efficiency of a single screw compressor is controlled to a large extent by the clearances between the casing, the screw and the star wheel. Because gaps exist among the shell, the screw and the star wheel, compressed high-pressure gas can leak to the low-pressure side through the gaps, so that the exhaust loss of the compressor is increased, the compression power is lost, and the efficiency of the compressor is reduced. Therefore, a single screw compressor with good sealing performance and high compression efficiency is urgently needed in the market.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a single screw compressor sealing system who possesses good sealing performance and can use for a long time.

The utility model also discloses a single screw compressor, this single screw compressor include above-mentioned a single screw compressor sealing system.

According to the utility model discloses a single screw compressor sealing system of first aspect embodiment includes:

a housing provided with a first liquid ejection port;

the screw is rotationally arranged on the shell;

the two star wheels are rotatably arranged on the shell, are respectively arranged on two sides of the screw rod and are meshed with the screw rod;

a compression cavity can be defined among the screw, the star wheel and the shell together;

the liquid supply device is communicated with the compression cavity through the first liquid spraying port;

and a liquid sealing mechanism for sealing a gap between the screw and the shell is arranged between the screw and the shell.

According to the utility model discloses a single screw compressor sealing system of first aspect embodiment has following beneficial effect at least:

the sealing system of the single-screw compressor is provided with the liquid sealing mechanism between the screw and the shell for sealing the gap between the screw and the shell, so that the leakage of compressed gas to the low-pressure side is prevented, the exhaust loss of the compressor is reduced, the efficiency of the compressor is improved, the liquid sealing mechanism can ensure good sealing performance after long-term use, and the service life of the single-screw compressor is prolonged.

According to the utility model discloses an in the embodiment of the first aspect, liquid seal mechanism is including setting up the ring channel of screw rod outer peripheral face and setting are in on the casing and with the second hydrojet that the ring channel is relative.

According to the utility model discloses an in the embodiment of the first aspect, the ring channel with the liquid seal chamber is injectd jointly to the inner wall of casing, supply liquid device to pass through the second spout liquid mouth with the liquid seal chamber is linked together, supply liquid device to be used for spouting high-pressure liquid into in the liquid seal chamber.

According to the utility model discloses an embodiment of first aspect, liquid seal mechanism still includes second sealing mechanism.

According to the utility model discloses an embodiment of the first aspect, the second sealing mechanism is for setting up the labyrinth seal structure of ring channel both sides.

According to the utility model discloses an embodiment of first aspect, the slope of first hydrojet sets up on the casing.

According to the utility model discloses an in the embodiment of the first aspect, first hydrojet is provided with two and two first hydrojet for the central symmetry axis central symmetry of screw rod distributes.

According to the utility model discloses an in the embodiment of the first aspect, be equipped with on the casing with the sealed face of star gear butt, the area of sealed face is crescent along the direction of gas compressed.

According to a second aspect of the present invention, there is provided a single screw compressor, comprising a single screw compressor sealing system as described above.

According to the utility model discloses single screw compressor of second aspect embodiment has following beneficial effect at least:

the screw rod and the shell are sealed in a liquid sealing mode, the used liquid is water, the service life of the compressor is long, the exhaust loss of the compressor is reduced, and the efficiency of the compressor is improved.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural diagram of a sealing system of a single screw compressor according to an embodiment of the first aspect of the present invention;

fig. 2 is a schematic structural diagram of a sealing system of a single screw compressor according to an embodiment of the first aspect of the present invention;

FIG. 3 is a schematic cross-sectional view of the embodiment A in FIG. 1;

FIG. 4 is a partial enlarged view of the embodiment C in FIG. 3;

FIG. 5 is a schematic cross-sectional view of the embodiment B shown in FIG. 1;

fig. 6 is a schematic structural diagram of a screw of a sealing system of a single screw compressor according to an embodiment of the first aspect of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the orientation description, such as the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., is the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplicity of description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 5, a sealing system of a single screw compressor includes: a housing 100, wherein the housing 100 can be divided into a low pressure area and a high pressure area, the housing 100 is provided with an air inlet 110 and an air outlet 120, preferably, the air inlet 110 is arranged in the low pressure area, the air outlet 120 is arranged in the high pressure area, the housing 100 is further provided with a first liquid spray port 130, preferably, the first liquid spray port 130 is arranged on the low pressure area of the housing 100 and faces a screw 200 arranged in the housing 100; a screw 200 rotatably disposed on the housing 100, preferably, the screw 200 is rotatably mounted on the housing 100 through a bearing; the two star wheels 300 are rotatably arranged on the shell 100, preferably, the star wheels 300 are arranged on the shell 100 through bearings, and the two star wheels 300 are respectively arranged on two sides of the screw rod 200 and meshed with the screw rod 200; the screw 200, the star wheel 300 and the casing 100 can jointly define a compression chamber 160, and the compression chamber 160 is a space in which air is compressed; the liquid supply device is communicated with the compression cavity 160 through the first liquid injection port 130, a certain amount of liquid can be injected into the compression cavity 160 through the first liquid injection port 130, the liquid in the compression cavity 160 is thrown to gaps among the screw rod 200, the star wheel 300 and the shell 100 along with the high-speed rotation of the screw rod 200, and the sealing and lubricating effects are achieved. A liquid seal mechanism 400 for sealing a gap between the screw 200 and the housing 100 is further provided between the screw 200 and the housing 100. Preferably, the liquid seal mechanism 400 is used to seal a gap between the outer circumferential surface of the screw 200 and the inner wall of the casing 100. Since the screw 200 rotates at a high speed in the casing 100, and the liquid seal mechanism 400 is disposed between the screw 200 and the casing 100, the liquid seal mechanism 400 can ensure a good sealing effect between the screw 200 and the casing 100, thereby reducing leakage of compressed gas and prolonging the service life of the compressor.

As shown in fig. 3, 4 and 6, the liquid seal mechanism 400 includes an annular groove 410 provided on the outer peripheral surface of the screw 200 and a second liquid ejection port 420 provided on the housing 100 and opposed to the annular groove 410. The screw 200 has a cylindrical portion 210 at one end thereof, which abuts against the inner wall of the casing 100, and the liquid seal mechanism 400 seals a gap between the outer peripheral surface of the cylindrical portion 210 and the inner wall of the casing 100. The liquid seal mechanism 400 includes an annular groove 410 provided on the outer peripheral surface of the cylindrical portion 210 and a second liquid ejection port 420 provided on the housing 100 and opposed to the annular groove 410, and preferably, as shown in fig. 4, the second liquid ejection port 420 is formed of a plurality of cylindrical holes having different diameters, the diameter of the cylindrical hole located on the outer wall of the housing 100 is smaller than the diameter of the cylindrical hole located on the inner wall of the housing 100, and the diameter of the cylindrical hole of the second liquid ejection port 420 located on the inner wall of the housing 100 is smaller than the width of the annular groove 410. The second liquid spray opening 420 is used for communicating high-pressure liquid, and the liquid pressure reaching the annular groove 410 can be further increased by adopting the second liquid spray opening 420 with the structure, so that the high-pressure liquid is more fully distributed on the annular groove, and the sealing effect is improved. The annular groove 410 for liquid seal is arranged on the screw rod 200, and high-pressure liquid is sprayed into the annular groove 410 through the second liquid spraying port 420 to realize the liquid seal, so that the exhaust loss of the compressor is reduced, and the efficiency of the compressor is improved.

As shown in fig. 3 to 4, the annular groove 410 and the inner wall of the casing 100 define a liquid seal chamber 430, and the liquid supply device is communicated with the liquid seal chamber 430 through the second liquid injection port 420 and is used for injecting high-pressure liquid into the liquid seal chamber 430. The liquid supply device is communicated with the second liquid injection port 420 and injects high-pressure liquid into the liquid seal cavity 430 to realize sealing, and since one side of the liquid seal cavity 430 has high-pressure compressed gas and the other side is a low-pressure side compared with the side having compressed gas, the high-pressure liquid injected into the liquid seal cavity 430 by the liquid supply device flows out from the low-pressure side with relatively low pressure after the liquid seal cavity 430 is filled. Preferably, the low pressure side is provided with a collecting means communicating with the liquid supply means for collecting liquid flowing from the low pressure side. The liquid supply device not only provides liquid for the first liquid spraying opening 130, but also provides high-pressure liquid for the liquid sealing mechanism 400, and the high-pressure liquid fills the liquid sealing cavity 430 to realize sealing, so that the whole structure is more compact.

As shown in fig. 3 to 4, in some embodiments, the liquid sealing mechanism 400 further includes a second sealing mechanism 440, and in order to further enhance the sealing effect and reduce the leakage amount of the compressed gas, the second sealing mechanism 440 may be further disposed between the screw 200 and the housing 100, and the second sealing mechanism 440 serves as an auxiliary mechanism to further enhance the sealing effect. Preferably, in some embodiments, the second sealing mechanism 440 is a labyrinth seal disposed on both sides of the annular groove 410. The labyrinth sealing structure is that a plurality of annular sealing teeth which are arranged in sequence are arranged on two sides of the annular groove 410, a series of cut-off gaps and expansion cavities are formed between the teeth, and liquid can generate throttling effect when passing through the gaps of the zigzag labyrinth, so that the purpose of leakage resistance is achieved. After the liquid seal chamber 430 is filled with the high-pressure liquid in the liquid seal chamber 430, the high-pressure liquid escapes to the gap between the screw 200 and the shell 100, and labyrinth seals are arranged on two sides of the annular groove 410, so that the function of pressure attenuation can be achieved, the high-pressure liquid is blocked from the gap between the screw 200 and the shell 100, the sealing effect between the screw 200 and the shell 100 is enhanced, and the leakage of compressed gas is reduced. Preferably, the second sealing mechanism 440 may also be a screw groove disposed at both sides of the annular groove 410, which may also have the effect of attenuating the pressure of the high-pressure liquid, enhancing the sealing performance between the screw rod 200 and the housing 100.

As shown in fig. 1 to 2, in some embodiments, the first liquid ejection port 130 is obliquely provided on the housing 100. The liquid ejected from the first liquid ejection port 130 is used for sealing the high pressure region of the casing 100. Preferably, as shown in fig. 1, the first liquid discharge port 130 is obliquely disposed toward the low pressure region of the housing 100. The liquid supply device sprays liquid with certain pressure into the first liquid spraying opening 130, the moving direction of the liquid sprayed out of the first liquid spraying opening 130 is consistent with the rotating direction of the screw rod 200, and the liquid sprayed out of the obliquely arranged first liquid spraying opening 130 can push the screw rod 200 to rotate, so that the purpose of reducing power consumption is achieved.

As shown in fig. 1 to 2, in some embodiments, the first liquid ejecting ports 130 are provided in two, and the two first liquid ejecting ports 130 are distributed in a central symmetry manner with respect to a central symmetry axis of the screw 200. First hydrojet 130 of two relative settings is the slope setting, and the direction of motion of the liquid of following first hydrojet 130 spun is unified mutually with the rotation direction of screw rod 200, and the first hydrojet 130 spun liquid of two slopes settings all can promote screw rod 200 to rotate, and it is better than traditional perpendicular hydrojet promotion screw rod 200 pivoted effect, and the effect that reduces the consumption is more obvious.

As shown in fig. 5, in some embodiments, the housing 100 is provided with a sealing surface that abuts the star 300, the area of the sealing surface gradually increasing in the direction in which the gas is compressed. The star 300 is rotatable relative to the housing 100, and the seal between the star 300 and the housing 100 is provided by a sealing surface provided on the housing 100 that abuts the star 300. Since the high pressure area of the casing 100 is filled with compressed gas, the leakage of the gas is more serious than the low pressure area of the casing 100, and therefore, the sealing effect between the casing 100 and the star wheel 300 in the high pressure area of the casing 100 should be better than that between the casing 100 and the star wheel 300 in the low pressure area of the casing 100. As shown in fig. 5, the area of the sealing surface 140 at the low pressure region of the housing 100 is less than the area of the sealing surface 150 at the high pressure region of the housing 100. By increasing the sealing surface area of the high pressure region of the housing 100, the amount of leakage of compressed gas between the star wheel 300 and the housing 100 can be effectively reduced.

As shown in fig. 1 to 6, a single screw compressor includes any one of the single screw compressor sealing systems described above. In some embodiments, the liquid used in the sealing system of the single screw compressor is oil, and the single screw compressor is an oil-injected single screw compressor, and preferably, the oil-injected single screw compressor further comprises an oil-gas separator, and the liquid supply device is used for supplying oil with pressure to the first liquid injection port 130 and supplying high-pressure oil to the second liquid injection port 420. The sealing system of the single-screw compressor is sealed by oil, has good sealing effect, and can achieve the effects of lubrication, cooling, noise reduction and the like. In some embodiments, it is preferable that the liquid used in the sealing system of the single screw compressor is water, the single screw compressor is a water-spraying single screw compressor, and the liquid supply device is used for supplying water with pressure to the first liquid injection port 130 and supplying high-pressure water to the second liquid injection port 420. The sealing system of the single screw compressor adopts water sealing, has good sealing effect, can reduce viscous shearing loss caused by oil injection, has good energy-saving effect, and is clean and environment-friendly.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A single screw compressor sealing system, comprising:

a housing (100) provided with a first liquid ejection port (130);

a screw (200) rotatably provided on the housing (100);

the two star wheels (300) are rotatably arranged on the shell (100), and the two star wheels (300) are respectively arranged on two sides of the screw rod (200) and meshed with the screw rod (200);

the screw (200), the star wheel (300) and the shell (100) can jointly define a compression cavity (160) therebetween;

the liquid supply device is communicated with the compression cavity (160) through the first liquid spraying port (130);

a liquid seal mechanism (400) for sealing a gap between the screw (200) and the housing (100) is arranged between the screw (200) and the housing (100).

2. A single screw compressor seal system according to claim 1, wherein said fluid seal mechanism (400) comprises an annular groove (410) provided on the outer peripheral surface of said screw (200) and a second fluid injection port (420) provided on said housing (100) and opposed to said annular groove (410).

3. A single screw compressor seal system as claimed in claim 2, wherein said annular groove (410) and the inner wall of said housing (100) together define a wet seal chamber (430), said liquid supply means communicating with said wet seal chamber (430) through said second liquid injection port (420), said liquid supply means for injecting a high pressure liquid into said wet seal chamber (430).

4. A single screw compressor sealing system as claimed in claim 2, wherein said hydraulic seal means (400) further comprises a second seal means (440).

5. A single screw compressor seal system according to claim 4, wherein said second seal means (440) is a labyrinth seal disposed on both sides of said annular groove (410).

6. A single screw compressor sealing system as claimed in claim 1, wherein said first liquid injection port (130) is provided obliquely to said housing (100).

7. A single screw compressor sealing system according to claim 6, characterised in that said first injection ports (130) are provided in two and in that two of said first injection ports (130) are arranged centrosymmetrically with respect to the central symmetry axis of said screw (200).

8. A single screw compressor sealing system according to claim 1, characterised in that the housing (100) is provided with a sealing surface abutting the star wheel (300), the area of the sealing surface increasing in the direction in which the gas is compressed.

9. A single screw compressor comprising a single screw compressor seal system according to any one of claims 1 to 8.