CN204099605U - A kind of self-cleaning type polypropylene recycle gas compressor gas film sealing structure - Google Patents

Abstract

The utility model relates to a kind of self-cleaning type polypropylene recycle gas compressor gas film sealing structure, it comprises machine wash liquor inlet, body cone, structure gland, axle, washing lotion outlet, throw-out collar, stationary ring, snap ring, moving sealing ring, atmospheric side rotating seat, atmospheric side labyrinth seal, side medium stationary seat and side medium labyrinth seal, it is characterized in that, described sealing configuration comprises side medium primary seal, the pair sealing of bearing side and labyrinth seal three part, the Seal cage that cleaning solution tangentially enters described body cone from described wash liquor inlet forms eddy flow, makes particle take away sealing configuration.Sealing configuration of the present utility model, without end face frictional wear, improves sealing stability, solves the problems such as working life is short; Flushing makes End Face Temperature Rise low, and energy consumption is little, sealing and good stability, therefore the good and maintenance and repair expense of this sealing reliability reduces.

Description

A kind of self-cleaning type polypropylene recycle gas compressor gas film sealing structure

Technical field

The utility model relates to a kind of sealing configuration, particularly relates to a kind of self-cleaning type polypropylene recycle gas compressor gas film sealing structure.

Background technique

Current, petrochemical industry high-temperature sticky medium pump is mainly used in the conveying of technological process medium in the devices such as petrochemical industry Refining Chemical Industry propane device bitumenpump, atmospheric and vacuum distillation, catalytic cracking, hydrogenation and coking thereof.Its applying working condition is all high temperature, full-bodied state usually, the material of conveying is oils, pitch class medium, because medium temperature is higher, cause machine-processed cracking fusion, produce polymerisation, produce polymerisate particle, cause mechanical seal end surface friction and wear failure, and then cause the security incidents such as material from leakage initiation fire, blast.The bellows mechanical seal frequent failure that " chemical machinery " the 38th certain petro-chemical corporation's High Temperature and Heavy Oil pump described in volume the 3rd phase P367 page adopts.The DBM-B-1 type mechanical seal that the High Temperature and Heavy Oil pump used in the said firm's atmospheric and vacuum distillation unit mainly adopts certain producer domestic to manufacture is single end face contact-type bellows fashion, and bellows adopts state type structure.After running a period of time, because the selection of first wife's mechanical seal exists some problems, cause mechanical seal large size and frequently leak.Give the mechanical seal of a kind of high temperature oil pump carbon spring type in the development of the New Type of Mechanical Seal for Hot Oil Pumps of " chemical machinery " the 22nd described in volume the 2nd phase P1, sealing configuration is in-built, interior stream, balance type, single end face.Rotating ring adopts hot insert cemented carbide structure, and stationary ring adopts hot insert to soak metallic graphite carbon (or cemented carbide) structure.Although the sealing of this structure type can be applied under high-temperature and high-pressure conditions, the effect used not is very good, and maintenance cost is high, price, and the life-span is short.Mention in " recycle gas compressor dry gas seals transform " in " lubricious and sealing " May 169 in 2005 periodical the uncontrollable sound of floating sleeve seal sealed due to TBS overlap between time often not rub, its structure also exists unreliability, therefore determines to adopt dry gas seals to transform.

Summary of the invention

For above-mentioned deficiency, the utility model provides a kind of self-cleaning type polypropylene recycle gas compressor gas film sealing structure, and it comprises machine wash liquor inlet, body cone, structure gland, axle, washing lotion exports, throw-out collar, stationary ring, snap ring, moving sealing ring, atmospheric side rotating seat, atmospheric side labyrinth seal, side medium stationary seat and side medium labyrinth seal, is characterized in that, described sealing configuration comprises side medium primary seal, the pair sealing of bearing side and labyrinth seal three part, described side medium primary seal and the pair sealing of bearing side are gas film sealing, the Seal cage of described body cone becomes centrum framework, Seal cage inside diameter is little, outside diameter is large, described wash liquor inlet tangentially enters the inner side external diameter of described cone, its tangential direction is consistent with the sense of rotation of described moving sealing ring, described washing lotion outlet holds greatly footpath tangent with the outside of described body cone, it is tangential consistent with the sense of rotation of described moving sealing ring, the Seal cage that cleaning solution tangentially enters described body cone from described wash liquor inlet forms eddy flow, makes particle take away sealing configuration.

Described side medium primary seal bears whole pressure medium, primary seal gas import A place passes into the process gas from compressor outlet, secondary seal gas import C place passes into the pipe network nitrogen of opening encapsulation end face and lubrication, cooling action, gas enters in both sides sealing rotating ring end face groove, make both ends of the surface be separated by a stable thin air film and be in non-contact running state, play gas film sealing effect; The process gas leaked out by described side medium primary seal is all introduced torch burning by nitrogen, and is nitrogen by secondary seal the whole of air that bleed, and when described side medium primary seal lost efficacy, the effect of auxiliary security sealing was played in secondary sealing equally.Wherein said moving sealing ring end face adopts external diameter fluting, and grooved line adopts helix, circular arc line or straight line.Described side medium stationary seat place arranges a taper gear piece, and with described body taper fit, described taper gear piece is preferably straight shape or spirality.

The remarkable advantage of this invention is:

1. make the maintenance and repair of sealing integral installation convenient disassembly convenient, constraint reduces good seal performance;

2. can rinse out that prior art exists at any time as pumped into because of seal face, and cause the solid particle of seal face abrasive wear, without end face frictional wear, improve the problems such as sealing stability, solution working life is short;

3. rinsing makes End Face Temperature Rise low, and energy consumption is little, sealing and good stability, therefore the minimizing of this sealing reliability good and maintenance and repair expense;

4. low in energy consumption, the life-span is long, can realize sealing medium zero leakage; Integral installation is accurate, convenient.

Accompanying drawing explanation

Fig. 1 is the utility model example structure schematic diagram.

Fig. 2 is the partial schematic diagram of the utility model embodiment.

Fig. 3 is gas film sealing device schematic diagram in the utility model embodiment.

In figure, 1-wash liquor inlet, 2-body centrum, 3-structure gland, 4-gas film sealing device, 5-axle, 6-washing lotion exports, 7-hexagon socket cap head screw, 8-stop pin, 9-spring, 10-throw-out collar, 11-stationary ring, 12-snap ring, 13-moving sealing ring, 14-atmospheric side rotating seat, the labyrinth seal of 15-atmospheric side, 16-side medium stationary seat, 17-key, 18-rotating ring place O shape is enclosed, the labyrinth seal of 19-side medium, 20-axle sleeve place O shape is enclosed, 21-labyrinth seal place hexagon socket cap head screw, 22-bearing, 23-sealing gasket, 24-locking nut.

Embodiment

As shown in Figure 1, self-cleaning mechanical seal cavity configuration of the present utility model is made up of machine wash liquor inlet 1, body centrum 2, structure gland 3, gas film sealing device 4, axle 5 and washing lotion outlet 6, it is characterized in that: described mechanical seal device 4 is installed on described axle 5, and integral assembling is in described body centrum 2, and be fixed on described body centrum 2 by described structure gland 3.The Seal cage of wherein said body centrum 2 is processed into centrum framework, and Seal cage inside diameter is little, and outside diameter is large, forms a frustum structure.Described wash liquor inlet 1 tangentially enters the inner side external diameter of described body centrum 2, and its tangential direction is consistent with the sense of rotation of mechanical sealing linkage ring.Described washing lotion outlet 6 holds greatly external diameter tangent with the outside of described body centrum 2, and its tangential direction is consistent with the sense of rotation of mechanical sealing linkage ring.The Seal cage that cleaning solution tangentially enters described body cone 2 from described wash liquor inlet 1 forms eddy flow, makes particle take away seal ring instantaneously, and eddy flow flows out the loss that the timely separating particles of Seal cage also can reduce washing lotion.The inner small and outside big structure of described body cone makes to be provided with larger operating space, especially makes integrated form install more convenient; This new structure is applicable to the industries such as oil, chemical industry, oil refining, can make greatly extend the working life of sealing.

As shown in Figure 3, described gas film sealing device 4 comprises throw-out collar 10, stationary ring 11, snap ring 12, moving sealing ring 13, atmospheric side rotating seat 14, atmospheric side labyrinth seal 15, side medium stationary seat 16 and side medium labyrinth seal 19, moving sealing ring 13 and stationary ring 11 are containing dynamic and static ring friction pair, described moving sealing ring 13 is tightly connected mutually with rotating machinery shaft 5, described stationary ring 11 and rotating machinery body are tightly connected, friction pair rotating ring or stationary ring have fluid dynamic pressure groove, in its running, dynamic pressure groove can make to produce fluid film between dynamic and static ring, and zone of high pressure is formed between rotating ring and stationary ring, high pressure sealing the leaking outside of mechanical interior ring, make dynamic and static ring friction pair produce fluid film lubricating low-friction coefficient non-contact friction secondary simultaneously, but in running, along with the rising of temperature, between the friction pair of dynamic and static ring fluid film lubrication, polymer beads can be produced.Primary seal gas import A place passes into the process gas from compressor outlet, and secondary seal gas import C place passes into the pipe network nitrogen of opening encapsulation end face and lubrication, cooling action.Gas enters the hydrodynamic spiral chute that both sides sealing rotating ring end face internal diameter place offers, the dynamic and static pressure effect of the liquid produced under rotation status, both ends of the surface are made to be separated by a stable thin air film and be in non-contact running state, ensure that zero leakage and zero effusion of processing medium, hydrodynamic spiral flute type design and centrifugal force effect under, can effectively prevent the solid particle in processing medium from entering sealing surface.The process gas leaked out by primary seal is all introduced torch burning by nitrogen.And be nitrogen by secondary seal the whole of air that bleed, when primary seal lost efficacy, the effect of auxiliary security sealing was played in secondary sealing equally.

Clean oil sealing with certain pressure is pumped into seal face by the fluid dynamic pressure groove of the dynamic and static ring friction pair of described gas film sealing device 4; along with the increase of oil sealing flow in groove; pressure increase; between seal face, form the fluid film with certain rigidity in time two sealing surfaces are separated; avoid end face frictional wear; realize film lubrication; reduce frictional heat; and in time the autopolymer formed under end face particle or specific condition is cleaned out; avoid it to accumulate in seal face and block dynamic pressure groove, having unique " self-cleaning function ".The clean particle out of this " self-cleaning function " will be taken away immediately, if can not take away but stay sealing around, then can cause the gathering of polymer equally, the particulate matter causing seal face to produce is sent out and is realized in mechanical seal self-cleaning, but assemble more and more serious until the particle aggregation of end face causes section friction, make seal failure.This Seal cage is just in time taken away immediately by clean for this " self-cleaning function " particle out, prevents polymer beads from staying sealing around, prevents seal failure.Meanwhile, washing solution has not only taken away the clean particle out of this " self-cleaning function ", but also has taken away the heat produced in mechanical seal running, decreases the clean particle out of this " self-cleaning function ".

Described side medium stationary seat 16 arranged outside one taper gear piece, coordinates with described body cone 2, and described taper gear piece is preferably straight shape or spirality, plays the effect increasing heat diffusion area.

Embodiment recited above is described preferred implementation of the present utility model; not design of the present utility model and scope are limited; under the prerequisite not departing from the utility model design concept; the various modification that in related domain, common engineers and technicians make the technical solution of the utility model and improvement; protection domain of the present utility model all should be fallen into; the technology contents of the utility model request protection, all records in detail in the claims.

Claims (4)

1. a self-cleaning type polypropylene recycle gas compressor gas film sealing structure, it comprises machine wash liquor inlet (1), body cone (2), structure gland (3), axle (5), washing lotion outlet (6), throw-out collar (10), stationary ring (11), snap ring (12), moving sealing ring (13), atmospheric side rotating seat (14), atmospheric side labyrinth seal (15), side medium stationary seat (16) and side medium labyrinth seal (19), it is characterized in that, described sealing configuration comprises side medium primary seal, the pair sealing of bearing side and labyrinth seal three part, described side medium primary seal and the pair sealing of bearing side are gas film sealing, the Seal cage of described body cone (2) becomes centrum framework, Seal cage inside diameter is little, outside diameter is large, described wash liquor inlet (1) tangentially enters the inner side external diameter of described cone (2), its tangential direction is consistent with the sense of rotation of described moving sealing ring (13), described washing lotion outlet (6) holds greatly footpath tangent with the outside of described body cone (2), it is tangential consistent with the sense of rotation of described moving sealing ring (13), the Seal cage that cleaning solution tangentially enters described body cone (2) from described wash liquor inlet (1) forms eddy flow, makes particle take away sealing configuration.

2. gas film sealing structure as claimed in claim 1, wherein said side medium primary seal bears whole pressure medium, primary seal gas import A place passes into the process gas from compressor outlet, secondary seal gas import C place passes into the pipe network nitrogen of opening encapsulation end face and lubrication, cooling action, gas enters in both sides sealing rotating ring end face groove, make both ends of the surface be separated by a stable thin air film and be in non-contact running state, play gas film sealing effect; The process gas leaked out by described side medium primary seal is all introduced torch burning by nitrogen, and is nitrogen by secondary seal the whole of air that bleed, and when described side medium primary seal lost efficacy, the effect of auxiliary security sealing was played in secondary sealing equally.

3. gas film sealing structure as claimed in claim 2, wherein said moving sealing ring (13) end face adopts external diameter fluting, and grooved line adopts helix, circular arc line or straight line.

4. gas film sealing structure as claimed in claim 1, wherein said side medium stationary seat (16) arranged outside one taper gear piece, coordinate with described body cone (2), described taper gear piece is straight shape or spirality.