CN209458407U - A kind of compressor gas film sealing device - Google Patents

Abstract

The utility model discloses a kind of compressor gas film sealing device, from seal cavity side medium to being disposed with preposition isolating seal module, main pressure bearing and seal module, secondary security seal module, postposition isolating seal module between bearing housing side；Preposition isolating seal module includes labyrinth ring and can be with the collar bush of compressor main shaft rotation, labyrinth ring and collar bush clearance fit；Main pressure bearing and seal module includes main rotating ring, main compensation ring, main compensation component, main spring, main balance set and main Pressure Block；It is convenient that the compressor gas film sealing device of the utility model is low in energy consumption, the service life is long, general safety is stablized, and can satisfy the complex working conditions of large-diameter, high pressure long distance pipeline compressor.

Description

A kind of compressor gas film sealing device

Technical field

The utility model relates to the face seals technical fields of mechanical rotary shaft, relate in particular to a kind of compressor Use gas film sealing device.

Background technique

Gao Long-distance Transmission Pipeline is one of prevailing traffic carrier of natural gas, and conveying route and branch line engineering use high pressure Power, the long distance gas transmission pipeline system of Large Diameter Pipeline, and pipeline compressor group is then known as " heart " of pipeline, compressor set Shaft end seal is then the key core device for guaranteeing compressor high pressure, long-time steady operation.Gas film sealing by with sealing gland gas, It realizes the sealing of non-contact gas film lubrication, there is the characteristics of low-power consumption, extra long life, high reliability and low operation expense, It has been widely used in Long-distance Transmission Pipeline compressor.As national 13 planning requirements form " trunk interconnection, region The national natural gas basic network of networking ", it is ensured that pipeline displacement, the pipeline compressor diameter of axle is increasing, and pressure is increasingly It is high.Domestic gas film sealing device includes axle journal mostly in 100mm or so at this stage, and pressure is in 10MPa hereinafter, and domestic large-diameter (150mm or more), high pressure (15MPa or more) gas film sealing are since pressure maintaining shakiness often occur in the factors such as structure, material, frequently The problem that sealed pressure is unstable when start and stop and the service life is short.

Utility model content

The purpose of this utility model is to provide a kind of compressor gas film sealing devices, to solve existing gas film sealing dress Set be not able to satisfy large-diameter, high pressure long distance pipeline compressor complex working condition defect.

For this purpose, the utility model provides a kind of compressor gas film sealing device, from seal cavity side medium to bearing Preposition isolating seal module, main pressure bearing and seal module, secondary security seal module, postposition isolating seal are disposed between case side Module；The preposition isolating seal module include labyrinth ring and can with compressor main shaft rotate collar bush, the labyrinth ring with The collar bush clearance fit；The main pressure bearing and seal module include main rotating ring, main compensation ring, main compensation component, main spring, Main balance set and main Pressure Block；The main rotating ring is fixed on collar bush step end face, and the main balance set is fixed On the main Pressure Block, the main compensation ring by the main compensation component floating connection on the main balance set, it is described Main compensation ring is by the main compensation component and the main spring floating connection on the main Pressure Block；The pair security seal Module includes intermediate sleeve, secondary rotating ring, secondary compensation ring, secondary compensation component, auxiliary spring, secondary balance set, secondary Pressure Block, clamping sleeve； The intermediate sleeve cooperation is fixed in the collar bush second level axis outer circle and is fixed by the clamping sleeve, the pair rotating ring It is fixed on the intermediate sleeve end face, the pair balance set is fixed on the secondary Pressure Block, and the secondary compensation ring passes through the pair Compensation component floating connection is floated in the secondary balance set, the secondary compensation ring by the secondary compensation component and the auxiliary spring It is connected on the secondary Pressure Block；The postposition isolating seal module includes the first floating ring component, floating ring spring, partition, second Floating ring component, rotary sleeve, seal box, seal receptacle；The seal box is mounted below the seal receptacle, and the seal box is equipped with Downward opening installation cavity, the first floating ring component and the second floating ring component are symmetricly set in the installation cavity, institute The first floating ring component and the second floating ring component are stated by the floating ring spring-loaded and is separated by the partition；The rotation Set is mounted on the compressor main shaft, and the rotary sleeve is located under the first floating ring component and the second floating ring component Side.

Preferably, the main bearing seat is equipped with primary seal gas entrance and level-one leakage hole, the primary seal gas entrance position Between the preposition isolating seal module and the main pressure bearing and seal module, it is close that the level-one leakage hole is located at the main pressure-bearing It seals between module and the secondary security seal module；The supplementary bearing seat is equipped with second level leakage hole, second level leakage hole position Between the secondary security seal module and the postposition isolating seal module；The seal receptacle is equipped with isolation gas entrance, institute It states isolation gas entrance and is connected to the seal receptacle, the seal box and the installation cavity.

Preferably, the labyrinth ring internal diameter is provided with multi-stage coaxial ring tooth, the coaxial rings tooth and the collar bush level-one Ladder outer circle clearance fit.

Preferably, the main compensation component includes compensating plate, pressing plate and accumulation of energy circle, and the compensating plate and the pressing plate offset It leans on, the lower end of the compensating plate and the pressing plate is surrounded by cavity, and the accumulation of energy circle is mounted in the cavity, the accumulation of energy circle Lower end be in contact with the main balance set.

Preferably, the main Pressure Block is equipped with annular groove, and the main spring is placed across in the annular groove And the annular groove is stretched out, the upper end of the compensating plate and the main spring are inconsistent.

Preferably, the material of the pressing plate is hard alloy, and the side of the pressing plate is equipped with ladder platform, the ladder platform with The main compensation ring is in contact.

Preferably, the material of the main balance set is hard alloy, and the inner radius of the main Pressure Block is equipped with installation groove, The main balance set is equipped with installation protrusion, and the installation protrusion is fixedly mounted in the installation groove.

It preferably, further include gland, the gland is fixed on the seal receptacle, and the gland is for compressing described first Floating ring component.

Compared with prior art, the advantages and positive effects of the utility model are as follows: the utility model provides a kind of compression Machine gas film sealing device, the compressor gas film sealing device of the utility model is low in energy consumption, the service life is long, general safety is stablized just Victory can satisfy the complex working conditions of large-diameter, high pressure long distance pipeline compressor.Preposition isolating seal module can be formed Throttle sealing structure, compact-sized, very saving space, and compressor main shaft can be protected injury-free, can also protect primary seal Not by the pollution of unclean medium.Main pressure bearing and seal module loads whole pressure mediums, can be realized large-diameter, high pressure compression The stable operation of machine；Secondary security seal module plays back-up safety sealing function, structure and main pressure bearing and seal modular structure phase Together, it is ensured that pressure medium can be undertaken after main pressure-bearing Module Fail, can strive for the cut-in stand-by compressor set time.Postposition isolation Seal modules play the role of insulation blocking, and the isolation gas being passed through can avoid exceeding explosion limit with dilution medium gas, can arrange safely It puts to atmosphere, the lubrication oil gas of bearing housing side can also be prevented to enter in secondary security seal module, protected so as to play isolation The effect of shield.

After specific embodiment of the present utility model is read in conjunction with the figure, other features and advantages of the utility model will become It obtains clearer.

Detailed description of the invention

Fig. 1 is a kind of partial structure diagram of embodiment of the utility model compressor gas film sealing device；

Fig. 2 is the round regional enlarged drawing in left side in Fig. 1；

Fig. 3 is the round regional enlarged drawing in right side in Fig. 1.

Specific embodiment

Specific embodiment of the present utility model is described in detail below, it should be appreciated that described herein Specific embodiment is only used for describing and explaining the present invention, and is not intended to limit the utility model.

As shown in Figure 1-Figure 3, the compressor gas film sealing device of the present embodiment is from seal cavity side medium to bearing housing Preposition isolating seal module, main pressure bearing and seal module, secondary security seal module, postposition isolating seal mould are disposed between side Block；

Preposition isolating seal module includes labyrinth ring 11 and can be with the collar bush 12 of the rotation of compressor main shaft 10, labyrinth ring 11 With 12 clearance fit of collar bush；Main pressure bearing and seal module includes main rotating ring 21, main compensation ring 22, main compensation component, main spring 23, main balance set 24 and main Pressure Block 25；Main rotating ring 21 is fixed on 12 step end face of collar bush, and main balance set 24 is fixed On main Pressure Block 25, by main compensation component floating connection on main balance set 24, main compensation ring 22 passes through main compensation ring 22 Main compensation component and 23 floating connection of main spring are on main Pressure Block 25；Secondary security seal module includes intermediate sleeve 31, secondary rotation Ring 21 ', secondary compensation ring 22 ', secondary compensation component, auxiliary spring 23 ', secondary balance set 24 ', secondary Pressure Block 25 ', clamping sleeve 32；It is intermediate 31 cooperation of set is fixed in 12 second level axis outer circle of collar bush and is fixed by clamping sleeve 32, and secondary rotating ring 21 ' is fixed on centre 31 end faces are covered, 24 ' set of pair balance is fixed on secondary Pressure Block 25 ', and pair compensation ring 22 ' passes through secondary compensation component floating connection in pair Balance set 24 ', pair compensation ring 22 ' pass through secondary compensation component and 23 ' floating connection of auxiliary spring on secondary Pressure Block 25 '；Postposition every It include the first floating ring component 41, floating ring spring 42, partition 43, the second floating ring component 41 ', rotary sleeve 44, sealing from seal modules Case 45, seal receptacle 46；Seal box 45 is mounted on 46 lower section of seal receptacle, and seal box 45 is equipped with downward opening installation cavity 47, the One floating ring component 41 and the second floating ring component 41 ' are symmetricly set in installation cavity 47, the first floating ring component 41 and the second floating ring group Part 41 ' is supported by floating ring spring 42 and is separated by partition 43；Rotary sleeve 44 is mounted on compressor main shaft 10, and rotary sleeve 44 In 41 ' lower section of the first floating ring component 41 and the second floating ring component.

As shown in Figure 1, left side is seal cavity side medium, right side is bearing housing side.

Main bearing seat 25 is equipped with primary seal gas entrance A and level-one leakage hole B, and primary seal gas entrance A is located at preposition isolation Between seal modules and main pressure bearing and seal module, level-one leakage hole B be located at main pressure bearing and seal module and secondary security seal module it Between；Supplementary bearing seat 25 ' is equipped with second level leakage hole C, and second level leakage hole C is located at secondary security seal module and postposition isolating seal mould Between block；Seal receptacle 46 is equipped with isolation gas entrance D, isolation gas entrance D communication seals seat 46, seal box 45 and installation cavity 47.

Specifically, 11 internal diameter of labyrinth ring is provided with the road 4-6 coaxial rings tooth, collar bush 12 is big hierarchic structure, coaxial rings tooth It is compact-sized so as to form throttling sealing structure with the step outer circle clearance fit of collar bush 12, it saves very much empty Between, and compressor main shaft 10 can be protected injury-free.Fit clearance size requires to calculate according to gas flow, does not do herein specific Limitation.It is passed through primary seal gas in primary seal gas entrance A, so that leading to primary seal between preposition isolation module and main pressure-bearing module Gas, primary seal gas are filtered by auxiliary system, except the cleaning procedure gas of water process, and pressure ratio compressors balance pipe pressure height, Therefore primary seal gas is mainly returned in compressor by preposition isolating seal module, so that preposition isolating seal module can protect Primary seal is not by the pollution of unclean medium.

Main pressure bearing and seal module includes main rotating ring 21, main compensation ring 22, main compensation component, main spring 23, main balance set 24 and main Pressure Block 25；Main rotating ring 21 is fixed on 12 step end face of collar bush, and drive mechanism is arranged, and makes main rotating ring 21 rotate with compressor main shaft 10.Main balance set 24 is fixed on main 25 inner radius of Pressure Block, specifically, main Pressure Block 25 Inner radius is equipped with installation groove, and main balance set 24 is equipped with installation protrusion, and installation protrusion is fixedly mounted in installation groove, thus Winner's balance set 24 is set to be fixed on main 25 inner radius of Pressure Block.

For main compensation ring 22 by main compensation component floating connection on main balance set 24, main compensation ring 22 passes through main compensation group Part and 23 floating connection of main spring are on main Pressure Block 25；Specifically, main compensation component includes compensating plate 26, pressing plate 27 and accumulation of energy Circle 28, compensating plate 26 and pressing plate 27 lean, and the lower end of compensating plate 26 and pressing plate 27 is surrounded by cavity, and accumulation of energy circle 28 is mounted on recessed In chamber, the lower end of accumulation of energy circle 28 is in contact with main balance set 24；The left lower side of pressing plate 27 be equipped with ladder platform 29, ladder platform 29 with Main compensation ring 22 is in contact；Main Pressure Block 25 is equipped with annular groove, and main spring 23 is laterally disposed, is interference fitted in annular groove In and stretch out annular groove, the upper end of compensating plate 26 and main spring 23 are inconsistent.Ladder platform 29 is according to compensation component stress condition It calculates and determines, be not particularly limited herein.

For main compensation ring 22 by main compensation component floating connection on main balance set 24, main compensation ring 22 passes through main compensation group Part and 23 floating connection of main spring, so as to form effective compensation mechanism, make winner compensate ring 22 on main Pressure Block 25 In the case where guaranteeing not leak, it can be free to move axially and reach compensation effect；It is set between main rotating ring 21 and main compensation ring 22 Set anti-rotation structure, it is ensured that main compensation ring 22 will not be driven by main rotating ring 21 to be rotated.

In not logical primary seal gas, main compensation component is pressed to main compensation ring by the elastic acting force of main spring 23 On 22；After the pressurization of logical primary seal gas because on pressing plate 27 ladder platform 29 design, entire main compensation component is in primary seal air pressure Being pressed to always on main compensation ring 22 under effect cannot come off, and pressure is higher, pressure it is tighter.Pressing plate 27 uses high-mechanical property Hard alloy material production, it can be ensured that invariance under large-diameter reaches high flatness, it is ensured that with main 22 end face of compensation ring Sealing cooperation do not leak.

Main pressure bearing and seal module needs to load whole pressure mediums, can be realized the stabilization of large-diameter, high pressure compressors Operation；Due to the self-characteristic of gas film sealing, can be let out between main rotating ring 21 and main compensation ring 22 by a small amount of primary seal gas Leak to the seal chamber between main Pressure Block 25 and secondary Pressure Block 25 ', these leakage gas a part through main pressure bearing and seal module with Level-one leakage hole B between secondary security seal module drains into atmosphere, lubrication gas of a part as secondary security seal module operating. Secondary security seal module plays back-up safety sealing function, and structure is identical as main pressure bearing and seal modular structure, it is ensured that main pressure-bearing Pressure medium can be undertaken after Module Fail, plays auxiliary security sealing function, can strive for the cut-in stand-by compressor set time. The a small amount of medium gas leaked from secondary rotating ring 21 ' and secondary compensation 22 ' seal face of ring is isolated through secondary security seal module and postposition Second level leakage hole C between seal modules drains into atmosphere.

Main balance set 24 and secondary balance set 24 ' are prepared using the hard alloy material of high-mechanical property, may be implemented It is indeformable under large-diameter, high pressure, and outer circle slide surface can achieve very high surface smoothness, realize that accumulation of energy circle 28 exists Its surface it is free to slide.Conventional design is without balance nested structure at present, but tubular structure is directly processed on seal receptacle, such as This cannot be guaranteed form accuracy and surface smoothness.

Partition 43 separates the installation cavity 47 in seal box 45 respectively to the first floating ring component 41 and the second floating ring component 41 ' The space of free floating is provided；First floating ring component 41 is identical with the shape and structure of the second floating ring component 41 ', includes 7 stones Black ring valve, 7 graphite annulus valves, which intersect to splice to match, is combined into full circle floating ring, and tension spring 48 is arranged in outer circle.Wherein graphite valve internal diameter Place setting dovetail groove, in separation gas by floating ring with rotary sleeve 44 when floating ring can be strutted, form the fit clearance of very little, subtract Abrasion when small rotary sleeve 44 rotates between floating ring component, prolongs the service life.Since gap is very small, saving can be realized Tolerance ensures that bearing oil does not enter secondary sealing region.

The setting of postposition isolating seal module is being isolated between secondary pressure-bearing module and bearing housing, and gas entrance D communication seals are isolated Seat 46, seal box 45 and installation cavity 47, isolation gas sequentially enter seal receptacle 46, seal box 45 and peace by the way that gas entrance D is isolated It behave affectedly in 47, hence between the first floating ring component 41 and the second floating ring component 41 '；Due to the first floating ring component 41 and The special dovetail groove of two floating ring components, 41 ' inner radius designs, in separation gas by floating ring with rotary sleeve 44 when floating ring can be supportted It opens, forms the fit clearance of very little, reduce and worn when rotary sleeve 44 rotates with floating ring, prolonged the service life；Very due to gap It is small, saving tolerance can be realized, ensure that bearing oil does not enter secondary sealing region.

Isolation gas is the clean air by filtering, except water process, and a part isolation gas enters through the first floating ring component 41 It cavity and is mixed with a small amount of medium gas from secondary sealing module leakage place between secondary Pressure Block 25 ' and seal receptacle 46, isolation gas is remote It is bigger than medium gas accounting, sufficiently dilute medium gas, avoid exceeding explosion limit, can safety dumping to atmosphere.Other side isolation Gas is blown to bearing lubrication oil tank through the second floating ring component 41 ', due to the minim gap between floating ring and rotary sleeve 44, is formed quick Air-flow can prevent the lubrication oil gas of bearing housing side from entering in secondary security seal module, so as to play the work of insulation blocking With.

Specifically, postposition isolating seal module further includes gland 47, gland is fixed on seal receptacle 45, and gland 47 is for pressing Tight first floating ring component 41.

Four orientation are determined with view relation shown in the drawings up and down defined in the present embodiment, are only Position and the connection relationship for clearly demonstrating all parts, are not the limitation to the present embodiment.

Above embodiments are only to illustrate the technical solution of the utility model, rather than are limited；Although referring to before Embodiment is stated the utility model is described in detail, it for those of ordinary skill in the art, still can be right Technical solution documented by previous embodiment is modified or equivalent replacement of some of the technical features；And these Modifications or substitutions, the utility model technical solution claimed that it does not separate the essence of the corresponding technical solution spirit and Range.

Claims (8)

1. a kind of compressor gas film sealing device is mounted on seal cavity side medium between bearing housing side, which is characterized in that

It is close from the seal cavity side medium to preposition isolating seal module, main pressure-bearing is disposed between the bearing housing side Seal module, secondary security seal module, postposition isolating seal module；

The preposition isolating seal module includes labyrinth ring and can be with the collar bush of compressor main shaft rotation, the labyrinth ring and institute State collar bush clearance fit；

The main pressure bearing and seal module includes that main rotating ring, main compensation ring, main compensation component, main spring, main balance set and master hold Wedge；The main rotating ring is fixed on collar bush step end face, and the main balance set is fixed on the main Pressure Block On, for the main compensation ring by the main compensation component floating connection on the main balance set, the main compensation ring passes through institute Main compensation component and the main spring floating connection are stated on the main Pressure Block；

The pair security seal module includes intermediate sleeve, secondary rotating ring, secondary compensation ring, secondary compensation component, auxiliary spring, secondary balance Set, secondary Pressure Block, clamping sleeve；The intermediate sleeve cooperation is fixed in the collar bush second level axis outer circle and by the compression casing pressure It fastens, the pair rotating ring is fixed on the intermediate sleeve end face, and the pair balance set is fixed on the secondary Pressure Block, described For pair compensation ring by the secondary compensation component floating connection in the secondary balance set, the secondary compensation ring passes through the secondary compensation group Part and the auxiliary spring floating connection are on the secondary Pressure Block；

The postposition isolating seal module includes the first floating ring component, floating ring spring, partition, the second floating ring component, rotary sleeve, close Joint sealing, seal receptacle；The seal box is mounted below the seal receptacle, and the seal box is equipped with downward opening installation cavity, The first floating ring component and the second floating ring component are symmetricly set in the installation cavity, the first floating ring component and institute The second floating ring component is stated by the floating ring spring-loaded and is separated by the partition；The rotary sleeve is mounted on the compressor On main shaft, the rotary sleeve is located at below the first floating ring component and the second floating ring component.

2. compressor gas film sealing device as described in claim 1, which is characterized in that

The main bearing seat be equipped with primary seal gas entrance and level-one leakage hole, the primary seal gas entrance be located at it is described it is preposition every From between seal modules and the main pressure bearing and seal module, the level-one leakage hole is located at the main pressure bearing and seal module and described Between secondary security seal module；The supplementary bearing seat is equipped with second level leakage hole, and the second level leakage hole is located at the secondary safety Between seal modules and the postposition isolating seal module；The seal receptacle is equipped with isolation gas entrance, the isolation gas entrance It is connected to the seal receptacle, the seal box and the installation cavity.

3. compressor gas film sealing device as described in claim 1, which is characterized in that

The labyrinth ring internal diameter is provided with multi-stage coaxial ring tooth, the coaxial rings tooth and the collar bush step outer circle gap Cooperation.

4. compressor gas film sealing device as described in claim 1, which is characterized in that

The main compensation component includes compensating plate, pressing plate and accumulation of energy circle, and the compensating plate and the pressing plate lean, the compensation The lower end of plate and the pressing plate is surrounded by cavity, and the accumulation of energy circle is mounted in the cavity, the lower end of the accumulation of energy circle and institute Main balance set is stated to be in contact.

5. compressor gas film sealing device as claimed in claim 4, which is characterized in that

The main Pressure Block be equipped with annular groove, the main spring be laterally arranged, be interference fitted in the annular groove and The annular groove is stretched out, the upper end of the compensating plate and the main spring are inconsistent.

6. compressor gas film sealing device as claimed in claim 4, which is characterized in that

The material of the pressing plate is hard alloy, and the side of the pressing plate is equipped with ladder platform, the ladder platform and the main compensation Ring is in contact.

7. compressor gas film sealing device as described in claim 1, which is characterized in that

The material of the main balance set is hard alloy, and the inner radius of the main Pressure Block is equipped with installation groove, the main balance It puts on and is equipped with installation protrusion, the installation protrusion is fixedly mounted in the installation groove.

8. compressor gas film sealing device as described in claim 1, which is characterized in that

It further include gland, the gland is fixed on the seal receptacle, and the gland is for compressing the first floating ring component.