CN1499108A - General layout of dry type gas lock system - Google Patents
General layout of dry type gas lock system Download PDFInfo
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- CN1499108A CN1499108A CNA2003101066065A CN200310106606A CN1499108A CN 1499108 A CN1499108 A CN 1499108A CN A2003101066065 A CNA2003101066065 A CN A2003101066065A CN 200310106606 A CN200310106606 A CN 200310106606A CN 1499108 A CN1499108 A CN 1499108A
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Abstract
An overall layout of dry gas sealing unit features that one or more presealings are additionally arranged between original labyrinth of compressor and the first-stage sealing of end face for easily controlling the pressure of the buffer air for the first-stage main sealing to prevent the sealing failure caused by negative pressure difference and the sealing damage caused by pollutant.
Description
Technical field
The invention belongs to the total arrangement of sealing device for rotary shaft in the fluid machinery, particularly relate to a kind of total arrangement of dry gas seal device of the running shaft end that is used for fluid machineries such as various types compressor, decompressor, seperator, pump, reactor stirrer.
Background technique
The total arrangement of the dry gas seal device of the at present known running shaft end that is used for fluid machineries such as various types compressor, decompressor, seperator, pump, reactor stirrer has multiple pattern.At first, see also Fig. 1 and Fig. 2, illustrated in figures 1 and 2 is the total arrangement of the most typical two kinds of two-stage series connection dry gas seal devices in the known technology.Wherein, in total arrangement shown in Figure 1, its working principle is that the cushion gas (being generally the process gas of compressor outlet) of purified treatment such as process filtration enters first order end face seal, its pressure P by the air-inlet cavity B of first order end face seal I
BThe pressure P that should be higher than the compressor labyrinth IV counter balance pocket A of process gas side
A, this cushion gas overwhelming majority enters the counter balance pocket A of compressor by the right half part IV-1 of labyrinth IV, and seldom a part then enters into the torch chamber C that sets fire by first order end face seal I; The pressure P of the air-inlet cavity B of first order end face seal I
BMust be greater than the pressure P of the torch chamber C that sets fire
C, i.e. P
B＞P
CIntroduce its pressure P by the neutral buffered gas air-inlet cavity D between first order end face seal I and the second level end face seal II
DPressure P greater than the torch chamber C that sets fire
CNeutral buffered gas (be generally N
2), enter the torch chamber C that sets fire after the throttling of this gas by the labyrinth L at the rotating ring II-1 cylindrical place of second level end face seal II, and after mixing, cushion gas (being generally process gas) that first order end face seal I leaks out enters the torch chamber C that sets fire.The neutral buffered gas of being introduced by the D chamber leaks into the E emptying of emptying chamber slightly by second level end face seal II.This shows that the gas that leaks into emptying chamber E by second level end face seal II is the neutral buffered gas that is substantially free of process gas (N for example
2).One group of clean separation gas of isolating the air-inlet cavity F introduction of hermetic seal III by postposition (is generally N
2Or purify air) enter into rearmounted one group of centre that isolates hermetic seal III after, a part enters into the E emptying of emptying chamber by a carbocyclic ring sealing III-1 on the left side, another part then enters into the chamber emptying of bearing side by the carbocyclic ring sealing III-2 on the right, enter second level end face seal II to prevent bearing oil.The total arrangement of this kind seal arrangement has following two major advantages, and the first, the cushion gas (being generally the process gas of purification) of supplying with first order end face seal I can only leak into sets fire torch chamber C and can not leak into emptying chamber E, free from environmental pollution; And the neutral buffered gas of supplying with second level end face seal II (is generally N
2) can only drain to set fire torch chamber C and emptying chamber E and can not drain in the compressor machine, do not influence the component of process gas.The second, from Security, if first order end face seal I had lost efficacy, end face seal II in the second level can also keep operation, and process gas is unlikely to drain in the factory building and goes, and Security is good.But still there is deficiency in this total arrangement: the gas pressure of some centrifugal compressor inlet is very low, is approximately equal to atmospheric pressure, i.e. P
A≈ 0MpaG, when the dry gas seal of its axle head adopts Fig. 1 or total arrangement shown in Figure 2, for the pressure of the air-inlet cavity B that guarantees first order end face seal I is higher than the pressure (pressure in this torch chamber of setting fire sometimes even up to about 0.1MpaG) of its torch chamber C that sets fire behind all the time, just must be by the pressure raising of modulating valve with the air-inlet cavity B of first order end face seal I.Returning the gas flow of compressor by compressor labyrinth IV-1 like this will be very big, has caused the increase of air inflow of first order end face seal I and the waste of the energy; Particularly when the big and regulating system action of the pressure surge of the torch chamber E that sets fire lagged behind, it is poor that back-pressure just may appear in first order end face seal, i.e. P
B＜P
C, P wherein
BBe the pressure of the air-inlet cavity B of first order end face seal I, P
CPressure for the torch chamber C that sets fire.The situation that the back-pressure difference appears in first order end face seal I can cause the inefficacy of this grade sealing.For the pressure reduction that guarantees first order end face seal I is that positive differential pressure is P
B＞P
C, guarantee P simultaneously again
B＞P
A, P wherein
ABe the pressure of the compressor labyrinth IV counter balance pocket A of process gas side, the pressure P of air-inlet cavity B
BMust be controlled by modulating valve, make it satisfy above-mentioned two inequality simultaneously, and the control signal of this modulating valve must derive from reflection Δ P simultaneously
B-A(=P
B-P
A) differential pressure transmitter and reflection Δ P
B-C(=P
B-P
C) differential pressure transmitter.Kong Zhi major defect has two like this: the first, and the control system complexity goes wrong easily, if in case Control Failure, it is poor that back-pressure appears in first order end face seal I, i.e. Δ P
B-C=P
B-P
C＜0 situation, then first order end face seal I will lose efficacy; The second, when the pressure P of torch chamber C
CWhen higher, in order to guarantee Δ P
B-C＞0, the pressure of air-inlet cavity B must be heightened, Δ P
B-A=P
B-P
AThen strengthen, the buffering tolerance that drains back in the machine by compressor labyrinth IV-1 strengthens, i.e. the invalid backflow of compressor increases, and efficient reduces.
What Fig. 2 represented is the total arrangement of another kind of two-stage series dry gas seal device in the known technology.The total arrangement that it and Fig. 1 represent has following 2 differences: the first, and between first order end face seal I and second level end face seal II, there is not neutral buffered gas (to be generally N
2) air-inlet cavity D, the cushion gas that leaks out from first order end face seal I (being generally the process gas through purifying) continues from second level end face seal II to external leakage except discharging from the torch chamber C that sets fire, and the cushion gas that leaks out is again by the E emptying of emptying chamber; The second, the postposition that is arranged in the second level end face seal II outside and is the bearing side is isolated hermetic seal and is changed labyrinth seal III ＇ into by the carbocyclic ring sealing III of Fig. 1.In this total arrangement, rearmounted isolation hermetic seal also can be the carbocyclic ring sealing shown in Fig. 1, only in order to be illustrated in two kinds of common rearmounted seal form is arranged in the known technology here.Compare with total arrangement shown in Figure 1, the advantage of total arrangement shown in Figure 2 is, reduced by a neutral buffered gas air-inlet cavity D, and is more simple in structure, is easier to realize for the technological transformation project ratio; But its shortcoming is, the cushion gas (being generally process gas) that leaks out from second level end face seal II is by the E emptying of emptying chamber, and is very unfavorable to environmental protection.
Summary of the invention
The present invention provides a kind of on the basis of known technology (no matter being single end face formula, Double End formula or two-stage series) for solving the technical problem that exists in the known technology, is the total arrangement that its process gas side increases the dry gas seal device of preposition sealing in the inboard of known total arrangement.The preposition sealing that increases can be single or the end face seal of combination, labyrinth seal, the sealing of straight tube, carbocyclic ring sealing etc., and wherein the progression of every kind of sealing can be that one-level also can be multistage.The total arrangement of dry gas seal device of the present invention be specially adapted to compressor inlet pressure approach atmospheric pressure the low pressure operating mode and (or) the sealed messy operating mode of process gas, can prevent that end face seal lost efficacy because of the back-pressure difference or because of being polluted by process gas, thereby improve the reliability of seal arrangement; And can reduce the invalid backflow of cushion gas, thereby raise the efficiency.
The technological scheme that the present invention takes for the technical problem that exists in the solution known technology is:
The present invention includes known original dry gas seal, the total arrangement of this original dry gas seal comprises mechanical single seal, double seals, two-stage series connection end face seal and the postposition that is the bearing side in these end face seal outsides are isolated hermetic seal, this postposition is isolated hermetic seal and is comprised carbocyclic ring sealing and labyrinth seal, it is characterized in that: on the basis of known dry gas seal total arrangement, in a side near sealed processing medium, promptly between original compressor labyrinth IV and original first order end face seal I, increase preposition sealing, this preposition sealing can be made up of the sealing of unimodality, also can form by the sealing of two or more pattern, every kind of sealing can be an one-level or more than the one-level, its seal style comprises end face seal, the carbocyclic ring sealing, labyrinth seal, straight tube sealing.
The present invention can also adopt following technical measures to realize:
The described preposition sealing of increase between original compressor labyrinth IV and original first order end face seal I, this preposition sealing is one-level mechanical single seal V, its concrete structure is, on the axle sleeve of running shaft, rotating ring is housed, the static seal circle is housed between axle sleeve and rotating ring, the stationary ring that fits with the rotating ring end face is contained on the static ring seat by secondary seal ring and throw-out collar and spring, the static seal circle is housed on static ring seat and prevents the stop pin that stationary ring rotates, near on the static ring seat of stop pin termination snap ring is being housed also, stationary ring is by means of spring, throw-out collar and secondary seal ring fit the seal face of its seal face and rotating ring and form the new mechanical single seal V of one-level.
Describedly increase preposition sealing between original compressor labyrinth IV and original first order end face seal I, this preposition sealing is one-level mechanical single seal V, it and the shared rotating ring I-1 of original first order end face seal I.
The described preposition sealing of increase between original compressor labyrinth IV and original first order end face seal I, this preposition sealing is the one-level combined labyrinth and carbon gland, it is made up of one-level end face seal and the sealing of one-level carbocyclic ring, promptly between original compressor labyrinth IV and original first order end face seal I, increase one-level mechanical single seal V and one-level carbocyclic ring sealing VI, mechanical single seal V and the shared rotating ring I-1 of original first order end face seal I; The carbocyclic ring sealing VI that includes carbocyclic ring assembly and spring is between newly-increased mechanical single seal V and original compressor labyrinth IV.
The described preposition sealing of increase between original compressor labyrinth IV and original first order end face seal I, this preposition sealing is the one-level combined labyrinth and carbon gland, it is made up of one group of labyrinth seal IV and one-level carbocyclic ring sealing VI, promptly increase the labyrinth seal VII that contains part, between original first order end face seal I and original compressor labyrinth IV, increase the carbocyclic ring that one-level includes carbocyclic ring assembly and spring and seal VI at the cylindrical place of the rotating ring I-1 of original first order end face seal I.
The described preposition sealing of increase between original compressor labyrinth IV and original first order end face seal I, this preposition sealing is the one-level combined labyrinth and carbon gland, it is made up of straight tube sealing of one-level and the sealing of one-level carbocyclic ring, promptly increase the straight tube sealing VII ' that one-level contains part, between original first order end face seal I and original compressor labyrinth IV, increase the one-level carbocyclic ring of forming by carbocyclic ring assembly and spring and seal VI at the cylindrical place of the rotating ring I-1 of original first order end face seal I.
The described preposition sealing of increase between original compressor labyrinth IV and original first order end face seal I, this preposition sealing are one-level carbocyclic ring sealing VI.
The described preposition sealing of increase between original compressor labyrinth IV and original first order end face seal I, this preposition sealing are two-stage carbocyclic ring sealing VI.
The described preposition sealing of increase between original compressor labyrinth IV and original first order end face seal I, this preposition sealing is made up of the sealing of the same types more than the two-stage, and the pattern of this preposition sealing comprises carbocyclic ring sealing, labyrinth seal and straight tube sealing.
The described preposition sealing of increase between original compressor labyrinth IV and original first order end face seal I, this preposition sealing is a combined labyrinth and carbon gland, it is made up of the sealing of two or more patterns, the pattern of these sealings comprises end face seal, carbocyclic ring sealing, labyrinth seal and straight tube sealing, wherein the quantity of every kind of sealing can be one-level, also can be more than the one-level.
The advantage that the present invention has with good effect is: compare with the total arrangement of known dry gas seal device, on known total arrangement basis, in a side near sealed processing medium, promptly between original compressor labyrinth IV and original first order end face seal I, increase one-level or the preposition sealing more than the one-level, make the easier control of pressure of original first order primary seal I, for the sealed cavity pressure low pressure operating mode close with atmospheric pressure, can prevent main seal cavity and set fire between the torch chamber, can prevent from again that blanket gas is back in a large number by the compressor labyrinth to cause waste in the machine because of Negative Pressure Difference causes seal failure; For the messy operating mode of sealed medium, then can protect original primary seal not lose efficacy better because of contaminated.The safety reliability of seal arrangement and performance driving economy just can improve greatly like this.
Description of drawings
Fig. 1 is the total arrangement structural representation of known a kind of two-stage series connection dry type hermetic seal;
Fig. 2 is the total arrangement structural representation of known another kind of two-stage series connection dry type hermetic seal;
Fig. 3 is the structural representation of the embodiment of the invention one;
Fig. 4 is the structural representation of the embodiment of the invention two;
Fig. 5 is the structural representation of the embodiment of the invention three;
Fig. 6 is the structural representation of the embodiment of the invention four;
Fig. 7 is the structural representation of the embodiment of the invention five;
Fig. 8 is the structural representation of the embodiment of the invention six;
Fig. 9 is the structural representation of the embodiment of the invention seven;
Figure 10 is the structural representation of the embodiment of the invention eight;
Figure 11 is the structural representation of the embodiment of the invention nine;
Figure 12 is the structural representation of the embodiment of the invention ten.
In above each accompanying drawing, the part that belongs to known technology does not all add hatching, has just just added hatching on the part that the present invention increases, and these parts are between the X-Y.I in each accompanying drawing is first order end face seal, I ' is the first order end face seal in the double seals, II is second level end face seal, II ' is the second level end face seal in the double seals, and III or III ' put for the bearing rear flank and isolate hermetic seal (wherein III is the carbocyclic ring sealing, and III ' is labyrinth seal), IV is the compressor labyrinth, V is mechanical single seal, and VI is preposition carbocyclic ring sealing, and VII and VII ' are respectively preposition labyrinth seal and straight tube sealing.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 a first order cushion gas air-inlet cavity, C is the torch chamber of setting fire, D is the neutral buffered gas air-inlet cavity between the two-stage end face seal, E is the torch chamber of setting fire, F is the rearmounted hermetic seal air-inlet cavity of isolating, and G is the primary seal gas air-inlet cavity of face-to-face formula double seals.Other symbol will specify in an embodiment.
Embodiment
For further understanding summary of the invention of the present invention, characteristics and effect, exemplify following examples now, and conjunction with figs. is described in detail as follows:
Placement scheme of the present invention should be determined flexibly according to condition such as the operating mode of main frame, the size of Seal cage.
Embodiment one: see also Fig. 3.
Fig. 3 is by realizing that on the basis of known technology shown in Figure 1 the preposition sealing that increases newly according to the present invention is the one-level mechanical single seal.Its total arrangement is, on the basis of total arrangement shown in Figure 1, side is promptly in the process gas side within it, between compressor labyrinth IV and first order end face seal I, promptly between the X-Y line, increase one-level mechanical single seal V, first order end face seal I connects with second level end face seal II, is provided with labyrinth seal L between first order end face seal I and second level end face seal II, and end face seal II in the second level isolates hermetic seal with the postposition of bearing side and connects.This isolation hermetic seal can be carbocyclic ring sealing III or labyrinth seal III ', and that present embodiment adopts is carbocyclic ring sealing III.
The present invention is realized by the above-mentioned one-level mechanical single seal V that increases between the X-Y line, the concrete structure of mechanical single seal V is, on the axle sleeve 22 of running shaft 23, rotating ring 1 is housed, between axle sleeve 22 and rotating ring 1, static seal circle 10 is housed, the stationary ring 2 that fits with the rotating ring end face is contained on the static ring seat 5 by secondary seal ring 3 and throw-out collar 4 and spring 6, static seal circle 9 is housed on static ring seat 5 and prevents the stop pin 7 that stationary ring 2 rotates, snap ring 8 also being housed, in case stationary ring 2 is deviate from installation process near on the static ring seat 5 of stop pin 7 terminations.Stationary ring 2 fits the seal face of its seal face and rotating ring 1 by means of spring 6, throw-out collar 4 and secondary seal ring 3 and forms the new mechanical single seal V of one-level.The total arrangement of present embodiment is that on the basis of known original total arrangement (Fig. 1), side has promptly increased one-level mechanical single seal V in the process gas side within it, and has increased a new chamber, i.e. primary seal air-inlet cavity G.Constituted the Double End formula sealing (formula face-to-face) of one-level double movable ring by the first order end face seal I of the one-level mechanical single seal V that part constituted in original known technology such as newly-increased rotating ring 1 and stationary rings 2.Therefore, the total arrangement of present embodiment both can have been thought on the basis of two-stage series connection sealing I and II, add the sealing that the single sealing of one-level (V) is formed, can think that again the sealing that one-level mechanical single seal (II) is formed is added in the double seals (V adds I) of one-level double movable ring.
The embodiments of the invention one that provide according to Fig. 3, increased one-level mechanical single seal V, it constitutes the double seals of the face-to-face formula double movable ring of one-level with original first order end face seal I, because the leakage rate of mechanical single seal V is far smaller than the leakage rate of compressor labyrinth IV-1, the pressure P of the cushion gas air feed chamber G of this double seals under same pressure differential
GThe pressure P of counter balance pocket A that can the ratio piston compressor labyrinth
APressure P with the torch chamber C that sets fire
CHigh, for example: satisfy Δ P simultaneously
B-A〉=0.2～0.5MPa and Δ P
B-C〉=0.2～0.5MPa.The advantage of doing like this has three: the first, because the sealability of mechanical single seal V is high far beyond compressor labyrinth IV-1, and pressure differential deltap P
B-ASignificantly improve and not only can not increase the capacity of reflux of cushion gas in compressor of introducing by the G chamber, can reduce this flow on the contrary, improve its working efficiency so can reduce the invalid backflow of compressor; The second, because Δ P
B-CSignificantly improve, first order end face seal I can be not Δ P because of the back-pressure difference
B-C＜0 and cause it to lose efficacy, improved the safety reliability of sealing; The 3rd, because Δ P
B-CWith Δ P
B-AThe increasing of absolute value and the increasing of adjustment range, the operation window of automatic regulating system strengthens, and sealing on the whole, safety reliability has improved.In a word, the embodiment of the invention one can be raised the efficiency and can be improved safety reliability, and its usefulness is very significant, and it is more remarkable especially inlet pressure to be approached its effect of low pressure compressor of atmospheric pressure.The present invention also can bring some disadvantages: increased the axial length between the X-Y.But, this also can be remedied by the length that shortens compressor labyrinth IV, especially concerning the very low low pressure compressor of inlet pressure, in fact the length of the compressor labyrinth IV particularly length in suction port of compressor end labyrinth can reduce greatly and can not influence the performance of compressor.
Embodiment two: see also Fig. 4.
Identical among the part that belongs to known technology in the figure and Fig. 3.Unique difference of total arrangement scheme and placement scheme shown in Figure 3 shown in this figure only is: cancelled the rotating ring 1 among Fig. 3, the rear ends of rotating ring I-1 of utilizing the first order end face seal I in the known technology is as the rotating ring end face of mechanical single seal V, in other words, the Double End formula sealing of the bispin change of in Fig. 3, forming by mechanical single seal V and first order end face seal I, become the Double End formula sealing that has public single rotating ring among Fig. 4, newly-increased mechanical single seal V and the shared rotating ring I-1 of original first order end face seal I.This embodiment's advantage obviously is the axial length that has reduced between the X-Y, decreases but its shortcoming is the reliability that seals logically.Other effect of this embodiment is identical with embodiment one.
Embodiment three: please refer to Fig. 5.
The part that belongs to the present invention in the figure and increased is with shown in Figure 4 identical, and its difference only is in the known technology part, rearmountedly isolates hermetic seal and has made labyrinth seal III ' into by the sealing of the carbocyclic ring among Fig. 4 III.This figure is just in order to show: feature of the present invention is not on business known changes in technology and is changed.By among the embodiment represented among Fig. 6-Figure 12, rearmounted isolation hermetic seal is all represented with carbocyclic ring sealing III without exception and is no longer used labyrinth seal III ' expression below, but they can be replaced by labyrinth seal.
Embodiment four: please refer to Fig. 6.
The part that belongs to the present invention in the figure and increased is identical with Fig. 4, and the part that just belongs to known technology is different: labyrinth seal L and neutral buffered gas air-inlet cavity D in the middle of not having.Because the difference of this figure and Fig. 5 only is known technology, the analysis of its pluses and minuses is omitted.Below among Fig. 7～Fig. 9, the part that belongs to known technology both can identical with Fig. 1 (band labyrinth seal L and neutral buffered gas air-inlet cavity D), can identical with Fig. 2 (not being with labyrinth seal L and neutral buffered gas air-inlet cavity D) yet, and substantive characteristics of the present invention is not subjected to the influence of known technology.
Embodiment five: please refer to Fig. 7.
This figure is on the basis of Fig. 6, increases one-level carbocyclic ring sealing VI according to the present invention again in the promptly the most close process gas side in front of newly-increased one-level mechanical single seal V, and sealing is made up of spring 13, carbocyclic ring assembly 14, end cap 15, static seal 16 and 17.Cushion gas (being generally the process gas through purifying) is introduced by the B chamber, and VI enters in the machine by the sealing of this grade carbocyclic ring.The sealing of this grade carbocyclic ring can more effectively protect mechanical single seal V and first order end face seal I not to be subjected to the pollution of dirtier process gas in the machine.Present embodiment is on the basis of known two-stage series connection sealing, and side established technology gas side has increased by one-level mechanical single seal V and the one-level carbocyclic ring sealing preposition sealing of combined type that VI formed within it.This embodiment is specially adapted to the very low and dirtier operating mode of process gas of compressor inlet pressure.
Embodiment six: please refer to Fig. 8.
In the figure, cancelled the mechanical single seal V among Fig. 7 and kept carbocyclic ring sealing VI, and increased labyrinth seal VII at the cylindrical place of the rotating ring I-1 of the first order end face seal I of known two-stage series connection sealing.Cushion gas (being generally the process gas through purifying) is introduced by the B chamber, enters in the machine by carbocyclic ring sealing VI by labyrinth seal VII earlier again.This total arrangement scheme is specially adapted to the dirtier operating mode of process gas, provides more effective protection to two-stage end face seal I and II.
Embodiment seven: please refer to Fig. 9.
In the figure, the carbocyclic ring sealing VI that increases newly according to the present invention still keeps, but the labyrinth seal VII at the cylindrical place of the rotating ring I-1 of first order end face seal I has been made into straight tube sealing VII ', so that reduce the back diffusion of process gas in the machine under the identical situation of cushion gas flow.The cushion gas of being introduced by the B chamber (can be outer bleed air source or the process gas through purifying) enters in the machine through carbocyclic ring sealing VI through straight tube sealing VII ' earlier again.It is very dirty and utilize outer bleed air source to make the operating mode of cushion gas that this embodiment is specially adapted in the machine gas.
Embodiment eight: please refer to Figure 10.
In the figure, the part that belongs to known technology is the total arrangement with face-to-face formula double seals of bispin change, from wherein air-inlet cavity G primary seal is isolated gas and (is generally N
2) introduce.The part that increases according to the present invention is the carbocyclic ring sealing VI between the X-Y, comprises spring seat 12, spring 13, carbocyclic ring assembly 14, static seal circle 15 and 17, end cap 16.General with introducing from the B chamber as cushion gas through the process gas that purifies.This embodiment is specially adapted to the dirtier and permission small amount of N of process gas in the machine
2Bleed operating mode in the machine.
Embodiment nine: please refer to Figure 11.
In the figure, it is close with Figure 10 to belong to known part, also is face-to-face formula double seals, only single rotation ring type.Belong to carbocyclic ring sealing VI-1 and VI-2 that part between the X-Y of the present invention comprises two-stage series connection, concrete part comprises: spring seat 12 ', spring 13, first order carbocyclic ring assembly 14, static seal circle 15, spring seat 16, static seal circle 17, spring 18, second level carbocyclic ring assembly 19, static seal circle 20 and the end cap 21 public with end face seal.To introduce from the B chamber as cushion gas, enter in the machine through second level carbocyclic ring sealing VI-2 again through first order carbocyclic ring sealing VI-1 earlier through the process gas that purifies.This embodiment is specially adapted to the very dirty and permission small amount of N of process gas
2Bleed operating mode in the machine.The progression that should be noted that the carbocyclic ring sealing can be three grades or more, decides on concrete application.
Embodiment ten: please refer to Figure 12.
In the figure, the sealing total arrangement that belongs to known part is to be the single end face formula, and it comprises the one-level end face seal I that is made up of rotating ring I-1 and stationary ring I-2 etc., forms rearmounted carbocyclic ring sealing III by carbocyclic ring III-1 and carbocyclic ring III-2 etc.Generally be to introduce from the B chamber as cushion gas with the process gas through purification, the overwhelming majority enters in the machine through the labyrinth IV-1 among the compressor labyrinth IV, and seldom part process first order end face seal I discharges through the torch of setting fire (or emptying) chamber E to external leakage; Rearmounted isolation gas (is generally N
2Or purify air) by introducing in the F chamber, a part is discharged through bleed torch (or emptying) the chamber E that sets fire of carbocyclic ring III-1; Another part is isolated gas then by the carbocyclic ring sealing III-2 bearing side emptying of bleeding, so that isolation bearing lubricant oil.Belong to part of the present invention between X-Y, be in series by the labyrinth seal VII (containing part 11) at the cylindrical place that is positioned at rotating ring I-1 and one-level carbocyclic ring sealing VI, carbocyclic ring sealing VI then is made up of part 12-17, and the title of these parts as previously mentioned.Cushion gas is introduced by the B chamber, and most of process labyrinth seal VII successively and carbocyclic ring sealing VI enter in the machine, and seldom a part is discharged set fire torch or emptying by the E chamber after first order end face seal I spills.In a word; present embodiment is on the basis of known mechanical single seal; side within it; established technology gas side has increased by labyrinth seal VII and the carbocyclic ring sealing preposition sealing of combined type that VI formed; so that more effectively protect first order end face seal I not to be subjected to the pollution of dirtier process gas, to improve the reliability of sealing.
As mentioned above, Fig. 3～embodiment shown in Figure 12 has embodied spirit of the present invention, but enforcement of the present invention is not limited to these embodiments.For example, the preposition sealing that increases newly is more than three grades or three grades, and its pattern can be a kind of, also can be two kinds, knockdown more than three kinds or three kinds; In addition, the total arrangement of known original dry gas seal can be any, and it is given to be not limited to Fig. 1-Figure 12.The total arrangement that meets the dry gas seal device of spirit of the present invention can also have many kinds, can not enumerate one by one here.
Claims (10)
1. the total arrangement of a dry gas seal device, comprise known original dry gas seal, the total arrangement of this original dry gas seal comprises mechanical single seal, double seals, two-stage series connection end face seal and the postposition that is the bearing side in these end face seal outsides are isolated hermetic seal, this postposition is isolated hermetic seal and is comprised carbocyclic ring sealing and labyrinth seal, it is characterized in that: on the basis of known dry gas seal total arrangement, in a side near sealed processing medium, promptly between original compressor labyrinth (IV) and original first order end face seal (I), increase preposition sealing, this preposition sealing can be made up of the sealing of unimodality, also can form by the sealing of two or more pattern, every kind of sealing can be an one-level or more than the one-level, its seal style comprises end face seal, the carbocyclic ring sealing, labyrinth seal, straight tube sealing.
2. the total arrangement of dry gas seal device according to claim 1, it is characterized in that: between original compressor labyrinth (IV) and original first order end face seal (I), increase preposition sealing, this preposition sealing is one-level mechanical single seal (V), its concrete structure is, on the axle sleeve (22) of running shaft (23), rotating ring (1) is housed, between axle sleeve (22) and rotating ring (1), static seal circle (10) is housed, the stationary ring (2) that fits with the rotating ring end face is contained on the static ring seat (5) by secondary seal ring (3) and throw-out collar (4) and spring (6), static seal circle (9) is housed on static ring seat (5) and prevents the stop pin (7) that stationary ring (2) rotates, near on the static ring seat (5) of stop pin (7) termination snap ring (8) is being housed also, stationary ring (2) is by means of spring (6), throw-out collar (4) and secondary seal ring (3) fit the seal face of its seal face and rotating ring (1) and form the new mechanical single seal of one-level (V).
3. the total arrangement of dry gas seal device according to claim 1 and 2, it is characterized in that: between original compressor labyrinth (IV) and original first order end face seal (I), increase preposition sealing, this preposition sealing is one-level mechanical single seal (V), it and the shared rotating ring of original first order end face seal (I) (I-1).
4. the total arrangement of dry gas seal device according to claim 1, it is characterized in that: between original compressor labyrinth (IV) and original first order end face seal (I), increase preposition sealing, this preposition sealing is the one-level combined labyrinth and carbon gland, it is made up of one-level end face seal and the sealing of one-level carbocyclic ring, promptly between original compressor labyrinth (IV) and original first order end face seal (I), increase one-level mechanical single seal (V) and one-level carbocyclic ring sealing (VI), mechanical single seal (V) and the shared rotating ring of original first order end face seal (I) (I-1); The carbocyclic ring sealing (VI) that includes carbocyclic ring assembly (14) and spring (13) is positioned between newly-increased mechanical single seal (V) and the original compressor labyrinth (IV).
5. the total arrangement of dry gas seal device according to claim 1, it is characterized in that: between original compressor labyrinth (IV) and original first order end face seal (I), increase preposition sealing, this preposition sealing is the one-level combined labyrinth and carbon gland, it is made up of one group of labyrinth seal (IV) and one-level carbocyclic ring sealing (VI), promptly increase the labyrinth seal (VII) that contains part (11), between original first order end face seal (I) and original compressor labyrinth (IV), increase the carbocyclic ring that one-level includes carbocyclic ring assembly (14) and spring (13) and seal (VI) at the cylindrical place of the rotating ring (I-1) of original first order end face seal (I).
6. the total arrangement of dry gas seal device according to claim 1, it is characterized in that: between original compressor labyrinth (IV) and original first order end face seal (I), increase preposition sealing, this preposition sealing is the one-level combined labyrinth and carbon gland, it is made up of straight tube sealing of one-level and the sealing of one-level carbocyclic ring, promptly increase the straight tube sealing that one-level contains part (11) (VII '), between original first order end face seal (I) and original compressor labyrinth (IV), increase the one-level carbocyclic ring of forming by carbocyclic ring assembly 14 and spring 13 and seal (VI) at the cylindrical place of the rotating ring (I-1) of original first order end face seal (I).
7. the total arrangement of dry gas seal device according to claim 1 is characterized in that: increase preposition sealing between original compressor labyrinth (IV) and original first order end face seal (I), this preposition sealing is one-level carbocyclic ring sealing (VI).
8. the total arrangement of dry gas seal device according to claim 1 is characterized in that: increase preposition sealing between original compressor labyrinth (IV) and original first order end face seal (I), this preposition sealing is two-stage carbocyclic ring sealing (VI).
9. the total arrangement of dry gas seal device according to claim 1, it is characterized in that: between original compressor labyrinth (IV) and original first order end face seal (I), increase preposition sealing, this preposition sealing is made up of the sealing of the same types more than the two-stage, and the pattern of this preposition sealing comprises carbocyclic ring sealing, labyrinth seal and straight tube sealing.
10. the total arrangement of dry gas seal device according to claim 1, it is characterized in that: between original compressor labyrinth (IV) and original first order end face seal (I), increase preposition sealing, this preposition sealing is a combined labyrinth and carbon gland, it is made up of the sealing of two or more patterns, the pattern of these sealings comprises end face seal, carbocyclic ring sealing, labyrinth seal and straight tube sealing, wherein the quantity of every kind of sealing can be one-level, also can be more than the one-level.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2003101066065A CN1499108A (en) | 2003-10-09 | 2003-10-09 | General layout of dry type gas lock system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2003101066065A CN1499108A (en) | 2003-10-09 | 2003-10-09 | General layout of dry type gas lock system |
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| Publication Number | Publication Date |
|---|---|
| CN1499108A true CN1499108A (en) | 2004-05-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2003101066065A Pending CN1499108A (en) | 2003-10-09 | 2003-10-09 | General layout of dry type gas lock system |
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| Country | Link |
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| CN (1) | CN1499108A (en) |
Cited By (8)
| 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 |
| CN101907105A (en) * | 2009-06-08 | 2010-12-08 | 胜达因公司 | The reverse pumping tandem process seal configuration |
| CN102454626A (en) * | 2010-10-21 | 2012-05-16 | 株式会社神户制钢所 | Compressor |
| CN103486268A (en) * | 2013-09-15 | 2014-01-01 | 丹东克隆集团有限责任公司 | Mechanical dry gas sealing device for pumps |
| CN104508335A (en) * | 2012-07-11 | 2015-04-08 | 利斯特股份公司 | Method and apparatus for handling a product |
| CN104806473A (en) * | 2014-01-24 | 2015-07-29 | 上海华林工业气体有限公司 | Filling device of piston CO (Carbon monoxide) compressor for HYCO plant |
| CN107237891A (en) * | 2017-08-08 | 2017-10-10 | 内蒙古鄂尔多斯联合化工有限公司 | A kind of equipment of natural gas compressor dry gas seals |
| CN111043069A (en) * | 2019-12-18 | 2020-04-21 | 沈阳透平机械股份有限公司 | Dry gas sealing control system for centrifugal compressor |
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2003
- 2003-10-09 CN CNA2003101066065A patent/CN1499108A/en active Pending
Cited By (11)
| 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 |
| CN101907105A (en) * | 2009-06-08 | 2010-12-08 | 胜达因公司 | The reverse pumping tandem process seal configuration |
| US8313281B2 (en) | 2009-06-08 | 2012-11-20 | Sundyne Corporation | Tandem seal arrangement with reverse flow secondary seal |
| 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 |
| CN104508335A (en) * | 2012-07-11 | 2015-04-08 | 利斯特股份公司 | Method and apparatus for handling a product |
| CN103486268A (en) * | 2013-09-15 | 2014-01-01 | 丹东克隆集团有限责任公司 | Mechanical dry gas sealing device for pumps |
| CN103486268B (en) * | 2013-09-15 | 2015-12-30 | 丹东克隆集团有限责任公司 | Pump dry gas mechanical seal device |
| CN104806473A (en) * | 2014-01-24 | 2015-07-29 | 上海华林工业气体有限公司 | Filling device of piston CO (Carbon monoxide) compressor for HYCO plant |
| CN107237891A (en) * | 2017-08-08 | 2017-10-10 | 内蒙古鄂尔多斯联合化工有限公司 | A kind of equipment of natural gas compressor dry gas seals |
| CN111043069A (en) * | 2019-12-18 | 2020-04-21 | 沈阳透平机械股份有限公司 | Dry gas sealing control system for centrifugal compressor |
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