CN2878719Y - Dry gas lock device for compressor for low entrance pressure liquid easily brought media - Google Patents
Dry gas lock device for compressor for low entrance pressure liquid easily brought media Download PDFInfo
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- CN2878719Y CN2878719Y CN 200620025396 CN200620025396U CN2878719Y CN 2878719 Y CN2878719 Y CN 2878719Y CN 200620025396 CN200620025396 CN 200620025396 CN 200620025396 U CN200620025396 U CN 200620025396U CN 2878719 Y CN2878719 Y CN 2878719Y
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Abstract
The utility model relates to a dry air sealing device for a compressor easily carrying liquid medium under pressure of low-import, and is mainly composed of a two-class series end surface seal comprising a first-class and second-class end surface seals, a single end surface seal installed in front of the first-class end surface seal, a maze seal set between the first-class and second-class end surface seals and a back separation seal connected back of the two-class series end surface seal, and it is characterized in that: the spring seat of the single end surface seal is provided with a ventilation mechanism leading to a pre-set buffer air chamber, and its structure can be a small hole and can also be external or internal one-way valve, or any combination between them. The utility model is characterized in that: firstly, the flow rate of the main sealed air can be increased to avoid the sealed air carrying liquid; secondly, once the main sealed air carries liquid, it can make the micro-droplet liquid in the main sealed air let out at any time, to prevent micro-droplet liquid from accumulating in the air cavity and avoiding sealing end surface carrying liquid, thereby enhancing the reliability of sealing equipment in operation.
Description
Technical field
The utility model belongs to and rotates shaft seal in the fluid machinery, particularly relates to a kind of compressor dry gas seal device that is used for low inlet pressure liquid easily brought media.
Background technique
At the present known various types compressor that is used for, and also have the dry gas seal device of the running shaft end of fluid machineries such as decompressor, seperator, pump, reactor stirrer that multiple pattern is arranged.See also Fig. 1 and Fig. 2, illustrated in figures 1 and 2 is a kind of dry gas seal device (its difference is: increased a rotating ring III-3 in the first order end face seal of Fig. 2) mentioned among the Chinese patent ZL2003201119176, its working principle is: the cushion gas (being generally the process gas of compressor outlet) through purified treatment such as filtrations enters front buffer gas air-inlet cavity B, its pressure P
BThe pressure P that should be higher than the compressor labyrinth VI counter balance pocket A of process gas side
A, this cushion gas enters the counter balance pocket A of compressor by the right half part of labyrinth VI, stops in the compressor gaseous contamination sealing without purified treatment.The air-inlet cavity C feeding pressure of being made up of stationary ring III-2, rotating ring I-1 and stationary ring I-2 (Fig. 2 is stationary ring III-2, rotating ring III-3, rotating ring I-1 and stationary ring I-2) is P
CGas as primary seal gas (being generally the process gas of compressor outlet), P
CGreater than P
BAnd pressure P greater than the torch chamber D that sets fire
D, the first order end face seal that this gas is formed by III and I enters air-inlet cavity B respectively and the torch chamber D that sets fire, and introduces its pressure P by air-inlet cavity E
EGreater than P
DNeutral gas (be generally N
2), its major part enters the torch chamber D that sets fire by the labyrinth L of cylindrical place of the rotating ring II-1 of end face seal II, and small part gas leaks into emptying chamber F by seal face II.The air-inlet cavity G of rearmounted isolating seal IV introduces the clean gas of isolating and (is generally N
2Or air), a part of gas leakage is to emptying chamber F, and another part gas leakage enters seal face II to bearing chamber emptying to prevent bearing oil.This kind seal arrangement has following three advantages: first, the cushion gas (being generally the process gas of purification) of supplying with first order end face seal can only leak into sets fire torch chamber D and can not leak into emptying chamber F, free from environmental pollution, and the neutral buffered gas of supply second level end face seal II (is generally N
2) can only leak into set fire torch chamber D and emptying chamber F, and can not drain in the compressor, the component of process gas do not influenced; The second, from Security, if first order end face seal was lost efficacy, second level end face seal can also be kept operation, and process gas is unlikely and drains in the factory building, and Security is good; The 3rd, very low for the suction port of compressor gas pressure, situation approximate or that equal atmospheric pressure can satisfy the blanket gas pressure P
CGreater than P
BAnd P
D, can not cause the sealing back-pressure, and make P
BAnd P
APressure reduction needn't be excessive, thereby reduced the flow that returns gas in the compressor, improved efficient.The part but the seal arrangement of this structure also comes with some shortcomings:, working medium dew point temperature height low for compressor inlet temperature, primary seal gas is with the situation of liquid easily by throttling cooling back, as ammonia, because gas can only be by sealing face leakage to the inside and flows outside, its flow is very little, can cause band liquid in air-inlet cavity B and the first order sealing surface, can cause sealing running state instability like this, bigger fluctuation appears in leakage rate, even can cause the damage of sealing.
Summary of the invention
The utility model provides a kind of dropping liquid that contains in the primary seal gas that enters air-inlet cavity C that can make to be not easy to assemble in air-inlet cavity for solving the technical problem that exists in the above-mentioned known technology, and then makes the seal face can be with the compressor dry gas seal device that is used for low inlet pressure liquid easily brought media of liquid.
The technological scheme that the utility model is taked for the technical problem that exists in the solution known technology is:
A kind of compressor dry gas seal device that is used for low inlet pressure liquid easily brought media, the mainly two-stage series connection end face seal of forming by first order end face seal (I) and second level end face seal (II) (V), the mechanical single seal of before first order end face seal, installing additional (III), the labyrinth seal (L) that is provided with between first order end face seal and second level end face seal and form at the rearmounted isolating seal (IV) that connects later of two-stage series connection end face seal, the spring seat of the mechanical single seal of installing additional before the first order end face seal (III-1) is provided with the ventilating mechanism of the air-inlet cavity (B) that leads to front buffer gas.
The utility model can also adopt following technical measures:
The structure of described ventilating mechanism is: at least one leads to the aperture (H) of the air-inlet cavity (B) of front buffer gas to be provided with quantity at the front end of described spring seat (III-1).
The structure of described ventilating mechanism is: the micro one-way valve (A) that at least one its runner of quantity leads to the air-inlet cavity (B) of front buffer gas is equipped with in the outside at the front end of described spring seat (III-1).
The structure of described ventilating mechanism is: the micro one-way valve (A ') that at least one its runner of quantity leads to the air-inlet cavity (B) of front buffer gas is equipped with in the inboard at the front end of described spring seat (III-1).
The structure of described ventilating mechanism is: at least one leads to the aperture (H) of the air-inlet cavity (B) of front buffer gas both to be provided with quantity at the front end of described spring seat (III-1), also in its outside the micro one-way valve (A) that at least one its runner of quantity leads to the air-inlet cavity (B) of front buffer gas is housed.
The structure of described ventilating mechanism is: at least one leads to the aperture (H) of the air-inlet cavity (B) of front buffer gas both to be provided with quantity at the front end of described spring seat (III-1), and also side is equipped with the micro one-way valve (A ') that at least one its runner of quantity leads to the air-inlet cavity (B) of front buffer gas within it.
The structure of described ventilating mechanism is: the micro one-way valve (A) that at least one its runner of quantity leads to the air-inlet cavity (B) of front buffer gas is equipped with in the outside at the front end of described spring seat (III-1), and also side is equipped with the micro one-way valve (A ') that at least one its runner of quantity leads to the air-inlet cavity (B) of front buffer gas within it.
The structure of described ventilating mechanism is: at least one leads to the aperture (H) of the air-inlet cavity (B) of front buffer gas both to be provided with quantity at the front end of described spring seat (III-1), also in its outside the micro one-way valve (A) that at least one its runner of quantity leads to the air-inlet cavity (B) of front buffer gas is housed, also side is equipped with the micro one-way valve (A ') that at least one its runner of quantity leads to the air-inlet cavity (B) of front buffer gas within it.
Described micro one-way valve (A) is to be made of the housing that has inlet hole (1) that is threaded in described spring seat (III-1) outside, the globe disk (3) that is contained in the air inlet position of housing inner chamber, the spring (2) of apical grafting between globe disk and plug that is threaded in the plug that has air outlet hole (4) of housing front end and is contained in the housing inner chamber.
Described micro one-way valve (A ') is by being threaded in the inboard housing that has inlet hole (1 ') of described spring seat (III-1), being contained in the globe disk (3 ') of the air inlet position of housing inner chamber and being contained in spring (2 ') formation of apical grafting between globe disk and described spring seat (III-1) of housing inner chamber.
Advantage and the good effect that the utlity model has are: because the spring seat of the mechanical single seal of installing additional before the first order end face seal of close sealed medium one side of aforesaid known dry gas seal device is provided with the ventilating mechanism of the air-inlet cavity that leads to front buffer gas, so just can play two effects, the first can be avoided the primary seal gas carrying liquid by strengthening the flow of primary seal gas; In case it two is primary seal gas carrying liquids, and the miniature dropping liquid that contains in the primary seal gas is released out at any time, prevent that miniature dropping liquid from assembling in air-inlet cavity, avoid causing sealed end to wear liquid, thereby improve the seal arrangement reliability of operation.The pattern of wherein establishing aperture on spring seat is applicable to the operating mode that medium gas is relatively cleaner; The pattern that micro one-way valve is installed on spring seat can prevent to shut down at centrifugal compressor, and after the primary seal air to close closes, enters in the seal face without the medium gas that purifies, and it is applicable to the operating mode that medium gas is messy.The utility model can be used for the running shaft end of the fluid machineries such as compressor, decompressor, seperator, pump and reactor stirrer of various types.
Description of drawings
Fig. 1 is the structural representation of a kind of dry gas seal device of known patent ZL2003201119176;
Fig. 2 is the structural representation of the another kind of dry gas seal device of known patent ZL2003201119176;
Fig. 3 is the utility model embodiment one a structural representation;
Fig. 4 is the utility model embodiment two a structural representation;
Fig. 5 is the utility model embodiment three a structural representation;
Fig. 6 is the utility model embodiment four a structural representation;
Fig. 7 is the structure for amplifying schematic representation of A among Fig. 5 and Fig. 6;
Fig. 8 is the utility model embodiment five a structural representation;
Fig. 9 is the utility model embodiment six a structural representation;
Figure 10 is the structure for amplifying schematic representation of A ' among Fig. 8 and Fig. 9.
In above each accompanying drawing, I is first order end face seal, and II is second level end face seal; III is the mechanical single seal of installing additional before the first order end face seal; IV puts isolating seal for the bearing rear flank; V is the two-stage series connection end face seal of being made up of first order end face seal and second level end face seal; VI is preposition isolating seal (preposition labyrinth); The labyrinth seal of L between first order end face seal and second level end face seal, being provided with; H is an aperture; A is external micro one-way valve; A ' is the built-in miniature one-way valve.The effect of each chamber of A-G is as follows among each figure: A is the counter balance pocket in compressor labyrinth; B is the cushion gas air-inlet cavity of first order end face seal; C is the air-inlet cavity of primary seal gas; D is the torch chamber of setting fire; E is the cushion gas air-inlet cavity of second level end face seal; F is the emptying chamber; G is rearmounted isolating seal air-inlet cavity.
Label among the figure is respectively: I-1, rotating ring; I-2, stationary ring; II-1, rotating ring; II-2, stationary ring; III-1, spring seat; III-2, stationary ring; III-3, rotating ring; IV-1 and IV-2 are respectively the front half part and the latter half part in the labyrinth (rearmounted labyrinth) of rearmounted isolating seal; 1, housing; 2, spring; 3, globe disk; 4, plug; 1 ', housing; 2 ', spring; 3 ', globe disk;
Embodiment
For further understanding summary of the invention of the present utility model, characteristics and effect, exemplify following examples now, and conjunction with figs. is described in detail as follows:
Embodiment one: see also Fig. 3.
Present embodiment is to realize on the basis of known technology shown in Figure 1, promptly be provided with the first order end face seal I that rotating ring I-1 and stationary ring I-2 constitute, rotating ring II-1 and stationary ring II-2 constitute second level end face seal II, they form two-stage series connection end face seal V jointly, before first order end face seal, add the mechanical single seal III that constitutes by spring seat III-1 and stationary ring III-2, between first order end face seal and second level end face seal, be provided with labyrinth seal L, be connected with rearmounted isolating seal IV in the back of two-stage series connection end face seal, its IV-1 and IV-2, front half part and the latter half part of representing the labyrinth (rearmounted labyrinth) of rearmounted isolating seal respectively, its improvement is, the front end of the spring seat III-1 of the mechanical single seal of installing additional before first order end face seal is provided with the aperture H of the air-inlet cavity B that leads to front buffer gas, the quantity of aperture can determine that the ventilating mechanism of this pattern is applicable to the operating mode that medium gas is relatively cleaner according to concrete application need.
Embodiment two: see also Fig. 4.
Present embodiment is to realize on the basis of known technology shown in Figure 2, the known part of its structure is to have increased a rotating ring III-3 on the basis of original mechanical single seal III that is made of spring seat III-1 and stationary ring III-2 with embodiment one difference, and its improvement part and embodiment one who relates to content of the present invention is identical.
Embodiment three: see also Fig. 5 and Fig. 7.
Present embodiment is to realize on the basis of known technology shown in Figure 1, the known part of its structure identical with described in the embodiment one, its improvement is, the outside screw of spring seat III-1 be connected with as shown in Figure 7 by the housing 1 that has inlet hole, be contained in the globe disk 3 of the air inlet position of housing inner chamber, the micro one-way valve that the spring 2 of the apical grafting that is threaded in the plug that has air outlet hole 4 of housing front end and is contained in the housing inner chamber between globe disk and plug constitutes, have the air inlet aperture of the inlet hole that leads to the micro one-way valve housing in the inboard of spring seat, the quantity of micro one-way valve can determine that the ventilating mechanism of this pattern is applicable to the operating mode that medium gas is messy according to concrete application need.
Embodiment four: see also Fig. 6 and Fig. 7.
Present embodiment is to realize on the basis of known technology shown in Figure 2, the known part of its structure identical with described in the embodiment two, and its improvement part and embodiment three who relates to content of the present invention is identical.
Embodiment five: see also Fig. 8 and Figure 10.
Present embodiment is to realize on the basis of known technology shown in Figure 1, the known part of its structure identical with described in the embodiment one, its improvement is, the inside thread of spring seat III-1 be connected with as shown in figure 10 by the housing 1 that has inlet hole ', be contained in the globe disk 3 of the air inlet position of housing inner chamber ' and be contained in the micro one-way valve A ' of the spring 2 ' formation of apical grafting between globe disk and described spring seat III-1 of housing inner chamber, have the aperture of giving vent to anger of the inner chamber that leads to the micro one-way valve housing in the outside of spring seat, the quantity of micro one-way valve can determine that the ventilating mechanism of this pattern also is applicable to the operating mode that medium gas is messy according to concrete application need.
Embodiment six: see also Fig. 9 and Figure 10.
Present embodiment is to realize on the basis of known technology shown in Figure 2, the known part of its structure identical with described in the embodiment two, and its improvement part and embodiment five who relates to content of the present invention is identical.
The utility model can also have following by above-mentioned each improvement structure (comprising aperture, external micro one-way valve and built-in miniature one-way valve), no matter in structure and quantity, and any combined embodiment:
Embodiment seven:
On the basis of Fig. 1 or known technology shown in Figure 2, on spring seat, both be provided with described in embodiment one quantity at least one lead to the aperture H of the air-inlet cavity B of front buffer gas, the micro one-way valve A that at least one its runner of quantity described in embodiment three leads to the air-inlet cavity B of front buffer gas also is housed.
Embodiment eight:
On the basis of Fig. 1 or known technology shown in Figure 2, on spring seat, both be provided with described in embodiment one quantity at least one lead to the aperture H of the air-inlet cavity B of front buffer gas, the micro one-way valve A ' that at least one its runner of quantity described in embodiment five leads to the air-inlet cavity B of front buffer gas also is housed.
Embodiment nine:
On the basis of Fig. 1 or known technology shown in Figure 2, the micro one-way valve A that at least one its runner of quantity described in embodiment three leads to the air-inlet cavity B of front buffer gas both had been housed on spring seat, the micro one-way valve A ' that at least one its runner of quantity leads to the air-inlet cavity B of front buffer gas also had been housed.
Embodiment ten:
On the basis of Fig. 1 or known technology shown in Figure 2, on spring seat, both be provided with described in embodiment one quantity at least one lead to the aperture H of the air-inlet cavity B of preposition stream cushion gas, the micro one-way valve A that at least one its runner of quantity described in embodiment three leads to the air-inlet cavity B of front buffer gas also is housed, the micro one-way valve A ' that at least one its road of quantity leads to the air-inlet cavity B of front buffer gas also is housed.
Claims (10)
1. compressor dry gas seal device that is used for low inlet pressure liquid easily brought media, the mainly two-stage series connection end face seal of forming by first order end face seal (I) and second level end face seal (II) (V), the mechanical single seal of before first order end face seal, installing additional (III), the labyrinth seal (L) that is provided with between first order end face seal and second level end face seal and form at the rearmounted isolating seal (IV) that connects later of two-stage series connection end face seal, it is characterized in that: the spring seat of the mechanical single seal of installing additional before the first order end face seal (III-1) is provided with the ventilating mechanism of the air-inlet cavity (B) that leads to front buffer gas.
2. the compressor dry gas seal device that is used for low inlet pressure liquid easily brought media according to claim 1, it is characterized in that: the structure of described ventilating mechanism is: at least one leads to the aperture (H) of the air-inlet cavity (B) of front buffer gas to be provided with quantity at the front end of described spring seat (III-1).
3. the compressor dry gas seal device that is used for low inlet pressure liquid easily brought media according to claim 1, it is characterized in that: the structure of described ventilating mechanism is: the micro one-way valve (A) that at least one its runner of quantity leads to the air-inlet cavity (B) of front buffer gas is equipped with in the outside at the front end of described spring seat (III-1).
4. the compressor dry gas seal device that is used for low inlet pressure liquid easily brought media according to claim 1, it is characterized in that: the structure of described ventilating mechanism is: the micro one-way valve (A ') that at least one its runner of quantity leads to the air-inlet cavity (B) of front buffer gas is equipped with in the inboard at the front end of described spring seat (III-1).
5. the compressor dry gas seal device that is used for low inlet pressure liquid easily brought media according to claim 1, it is characterized in that: the structure of described ventilating mechanism is: at least one leads to the aperture (H) of the air-inlet cavity (B) of front buffer gas both to be provided with quantity at the front end of described spring seat (III-1), also in its outside the micro one-way valve (A) that at least one its runner of quantity leads to the air-inlet cavity (B) of front buffer gas is housed.
6. the compressor dry gas seal device that is used for low inlet pressure liquid easily brought media according to claim 1, it is characterized in that: the structure of described ventilating mechanism is: at least one leads to the aperture (H) of the air-inlet cavity (B) of front buffer gas both to be provided with quantity at the front end of described spring seat (III-1), and also side is equipped with the micro one-way valve (A ') that at least one its runner of quantity leads to the air-inlet cavity (B) of front buffer gas within it.
7. the compressor dry gas seal device that is used for low inlet pressure liquid easily brought media according to claim 1, it is characterized in that: the structure of described ventilating mechanism is: the micro one-way valve (A) that at least one its runner of quantity leads to the air-inlet cavity (B) of front buffer gas is equipped with in the outside at the front end of described spring seat (III-1), and also side is equipped with the micro one-way valve (A ') that at least one its runner of quantity leads to the air-inlet cavity (B) of front buffer gas within it.
8. the compressor dry gas seal device that is used for low inlet pressure liquid easily brought media according to claim 1, it is characterized in that: the structure of described ventilating mechanism is: at least one leads to the aperture (H) of the air-inlet cavity (B) of front buffer gas both to be provided with quantity at the front end of described spring seat (III-1), also in its outside the micro one-way valve (A) that at least one its runner of quantity leads to the air-inlet cavity (B) of front buffer gas is housed, also side is equipped with the micro one-way valve (A ') that at least one its runner of quantity leads to the air-inlet cavity (B) of front buffer gas within it.
9. the compressor dry gas seal device that is used for low inlet pressure liquid easily brought media according to claim 3 is characterized in that: described micro one-way valve (A) is to be made of the housing that has inlet hole (1) that is threaded in described spring seat (III-1) outside, the globe disk (3) that is contained in the air inlet position of housing inner chamber, the spring (2) of apical grafting between globe disk and plug that is threaded in the plug that has air outlet hole (4) of housing front end and is contained in the housing inner chamber.
10. the compressor dry gas seal device that is used for low inlet pressure liquid easily brought media according to claim 4 is characterized in that: described micro one-way valve (A ') is by being threaded in the inboard housing that has inlet hole (1 ') of described spring seat (III-1), being contained in the globe disk (3 ') of the air inlet position of housing inner chamber and being contained in spring (2 ') formation of apical grafting between globe disk and described spring seat (III-1) of housing inner chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620025396 CN2878719Y (en) | 2006-02-23 | 2006-02-23 | Dry gas lock device for compressor for low entrance pressure liquid easily brought media |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620025396 CN2878719Y (en) | 2006-02-23 | 2006-02-23 | Dry gas lock device for compressor for low entrance pressure liquid easily brought media |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2878719Y true CN2878719Y (en) | 2007-03-14 |
Family
ID=37861134
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620025396 Expired - Lifetime CN2878719Y (en) | 2006-02-23 | 2006-02-23 | Dry gas lock device for compressor for low entrance pressure liquid easily brought media |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2878719Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100378330C (en) * | 2006-02-23 | 2008-04-02 | 约翰克兰鼎名密封(天津)有限公司 | Dry gas sealer for compressor with low inlet pressure and liquid-carrying medium |
| CN102454626A (en) * | 2010-10-21 | 2012-05-16 | 株式会社神户制钢所 | Compressor |
| CN107269315A (en) * | 2017-07-31 | 2017-10-20 | 上海齐耀膨胀机有限公司 | Screw machine sealing system and the method that prevents seal failure for cryogenic media gas |
-
2006
- 2006-02-23 CN CN 200620025396 patent/CN2878719Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100378330C (en) * | 2006-02-23 | 2008-04-02 | 约翰克兰鼎名密封(天津)有限公司 | Dry gas sealer for compressor with low inlet pressure and liquid-carrying medium |
| CN102454626A (en) * | 2010-10-21 | 2012-05-16 | 株式会社神户制钢所 | Compressor |
| CN102454626B (en) * | 2010-10-21 | 2015-08-26 | 株式会社神户制钢所 | Compressor |
| CN107269315A (en) * | 2017-07-31 | 2017-10-20 | 上海齐耀膨胀机有限公司 | Screw machine sealing system and the method that prevents seal failure for cryogenic media gas |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20080402 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |