CN106151524B

CN106151524B - A kind of I-shaped double mechanical seal for blocking chamber of band

Info

Publication number: CN106151524B
Application number: CN201510106072.9A
Authority: CN
Inventors: 韩乐工
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-03-09
Filing date: 2015-03-09
Publication date: 2018-06-12
Anticipated expiration: 2035-03-09
Also published as: CN106151524A

Abstract

The present invention relates to a kind of I-shaped double mechanical seals for blocking chamber of band, it is made of axle sleeve, front end movable ring structure, front end stationary ring, sealing shroud, rear end stationary ring, rear end movable ring structure, gland and auxiliary sealing member, and form I-shaped closure chamber, thus form the spill movable sealing structure of former and later two end face seal faces Q, H and radial ring seal face J, so as to make the I-shaped double mechanical seal for blocking chamber of this band that can also realize zero leakage, long-life safe operation when without sealing oil system.

Description

A kind of I-shaped double mechanical seal for blocking chamber of band

Technical field

The present invention relates to mechanical seal, the I-shaped double mechanical seal for blocking chamber of specifically a kind of band.

Background technology

As the requirement to environmental protection is increasingly strict, in order to reach these requirements in petroleum chemical industry, for defeated Send the mechanical seal used in the equipment of poisonous and harmful, high temperature, inflammable and explosive medium, it is proposed that higher requirement will use Double mechanical seal and sealing oil system is also mixed, the medium for ensureing to accomplish to be sealed does not leak outside, that is, to accomplish that zero lets out Leakage, and can also securely and reliably, the long-life run.So-called sealing oil system is typically by oil sealing tank, oil sealing pump, oil sealing pipeloop Compositions is waited to be used for the system for providing oil sealing, so-called zero leakage is that oil sealing pressure is instigated to be slightly above sealed medium pressure and prevent quilt Sealing medium does not leak outside, and allows the state for having a small amount of Sealing oil leakage, and this not only adds the costs of mechanical seal operation, also increase The reliability requirement to sealing oil system is added, sealing oil system is unreliable, and safety in production is equally difficult to guarantee, if without sealing oil system Also double mechanical seal can be made to accomplish zero leakage, the safe and reliable, long-life runs this and is undoubtedly mechanical sealing technology to be solved An important topic certainly.

Invention content

A kind of I-shaped double mechanical seal for blocking chamber of band provided by the invention is exactly solve this subject one Achievement.

The I-shaped double mechanical seal for blocking chamber of the band is by axle sleeve, front end movable ring structure, front end stationary ring, sealing Set, rear end stationary ring, rear end movable ring structure, gland and auxiliary sealing member composition；

The front end stationary ring and rear end stationary ring under the cooperation of front and back ends stationary ring sealing ring back-to-back insertion by sealing shroud In the cavity being combined into gland, front and back ends stationary ring is L-shaped, forms one with sealing shroud inner headed face after connection back-to-back The ring cavity of rectangle；On sealing shroud, rear end stationary ring sealing ring is assemblied on gland the front end stationary ring sealing ring, sealing Set and gland are to be threadedly coupled；

The inner headed face of the front and back ends stationary ring is then and the axle sleeve with spill ring-type periphery forms a longer rectangle Ring cavity；

The position that the front and back ends stationary ring leans against back contacts is then provided with slot and makes the ring cavity phase of upper and lower two rectangles It is logical, form I-shaped closure chamber；

It is described this it is I-shaped block chamber by the rotating ring or wear ring that are assemblied in the front and back ends movable ring structure on axle sleeve with The end face seal that the end face of front and back ends stationary ring is formed is closed；

It is provided on the gland and is communicated for the entrance that muddy packing fills by sealing shroud and I-shaped closure chamber, it will be each Kind of muddy packing, which is injected into I-shaped closure chamber and neutralizes former and later two end faces, together forms a spill movable sealing structure；

The sealing shroud and gland also add a seam allowance sealing ring when being threadedly coupled, for ensureing I-shaped closure chamber Closure；

I-shaped closure chamber can not also inject muddy packing and connect the entrance of filling by front end face with jet pump The micro medium that sealing leak goes out is pumped to the place to go specified and the sealing is made to realize zero leakage；

The gland is provided with cooling water entrance, and effect is can to quote cooling to back-end sealing face and rear end movable ring structure Water, which is cooled down and seal cage is formed under the cooperation of gland dustband, prevents the air when I-shaped closure chamber forms negative pressure Into sealing.

Elastic element is additionally provided with the I-shaped double mechanical seal for blocking chamber as described above, elastic element can basis The process conditions demand of used equipment is mounted on the different parts：

Double mechanical seal as described above with I-shaped closure chamber, before front end movable ring structure is by being sleeved on axle sleeve front end Spring case, elastic element, rotating ring, seal ring of moving ring and front springs box antirotation keys composition are held, thus it is built-in to form elastic element The I-shaped double mechanical seal for blocking chamber of formula band.

Double mechanical seal as described above with I-shaped closure chamber, after rear end movable ring structure is by being sleeved on axle sleeve rear end Spring case, rear end rotating ring, rear end seal ring of moving ring, rear end spring case positioning screw composition are held, thus forms elastic element exterior The I-shaped double mechanical seal for blocking chamber of formula band.

As described above with it is I-shaped block chamber double mechanical seal, elastic element can also be separately mounted to sealing shroud and It is acted directly on gland on front and back ends stationary ring, thus forms the I-shaped Double End machine for blocking chamber of elastic element standing type band Tool seals.

As described above packaging type structure, thus gland and axle sleeve are used with the I-shaped double mechanical seal for blocking chamber Each sealing element axial position of upper installation is realized by sealing axially position seat.

It is equal with the I-shaped double mechanical seal for blocking chamber, rear end moving ring sleeve or rear end spring case and axle sleeve as described above It is fixed using threaded connection and with holding screw, thus the sealing is and the axle sleeve collection of equipment is used to be fitted together, and such as uses It should then be prepared when on cantilever pump by the axle sleeve specification of the equipment.

As described above with the I-shaped double mechanical seal for blocking chamber, it is possible to use through type axle sleeve, such versatility More preferably, it but to add positioning of axle sleeve ring and lock screw lock with snap ring.

Present invention sealing is only additionally arranged an I-shaped closure chamber in double-face mechanical sealing structure, becomes band work Font block chamber double mechanical seal, thus can make mechanical seal realized under conditions of without sealing oil system zero leakage, Securely and reliably, the long-life runs, and elastic element can be also arranged on to the different parts of the sealing to meet various different works Demand of the running equipment to mechanical seal under the conditions of skill, this and generally could realize the machinery of zero leakage using sealing oil system now Sealing is compared to a undoubtedly big progress.

Description of the drawings

Fig. 1 is the I-shaped Double End for blocking chamber of band that front and back ends stationary ring sealing ring of the present invention is assemblied on sealing shroud Mechanical seal structure schematic diagram；

Fig. 2 is that stationary ring sealing ring in front end of the present invention is mounted on sealing shroud, and rear end stationary ring sealing ring is assemblied in the band on gland The I-shaped double-face mechanical sealing structure schematic diagram for blocking chamber；

Fig. 3 is that the present invention connects jet pump operating diagram with the I-shaped double mechanical seal for blocking chamber；

Fig. 4 be the present invention and cantilever pump shaft sleeve packaging together with elastic element built-in type band it is I-shaped closure chamber both-end Face mechanical seal structure diagram；

The I-shaped both-end for blocking chamber of elastic element built-in type band that Fig. 5 is the present invention and through type axle sleeve collection is fitted together Face mechanical seal structure diagram；

Fig. 6 be the present invention and cantilever pump shaft sleeve packaging together with elastic element fitted outside band it is I-shaped closure chamber both-end Face mechanical seal structure diagram；

Fig. 7 be the present invention and cantilever pump shaft sleeve packaging together with elastic element standing type band it is I-shaped closure chamber both-end Face mechanical seal structure diagram；

The right side that Fig. 8 is Fig. 5 regards schematic diagram；

The right side that Fig. 9 is Fig. 6 regards schematic diagram；

Figure 10 is muddy packing injection mode schematic diagram.

In figure：1- axle sleeves, 2- front ends movable ring structure, 3- front ends stationary ring, 4- front ends stationary ring sealing ring, 5- sealing shrouds, 6- works Font blocks chamber, 7- rear ends stationary ring, 8- rear ends stationary ring sealing ring, 9- gland rings, 10- seam allowance sealing rings, 11- glands, 12- Rear end movable ring structure, 13- gland dustbands, 14- injection pump discharges, 15- jet pumps, 16- jet pump inlet adjustment valves, 17- bands The I-shaped double mechanical seal for blocking chamber, 18- pressure vacuum gauges, 19- front springs boxes, 20- elastic elements, 21- front ends Rotating ring, 22- front ends seal ring of moving ring, 23- rear ends wear ring sealing ring, 24- rear ends wear ring, 25- rear ends moving ring sleeve positioning spiral shell Nail, 26- rear ends moving ring sleeve, 27- rear ends seal ring of moving ring, 28- sleeve sealing circles, 29- axle sleeve pads, 30- front springs box anti-rotations Key, 31- positioning of axle sleeve rings, 32- sealing axially position seats, 33- positioning seat screws, 34- front ends moving ring sleeve, 35- front ends rotating ring Cover holding screw, 36- front ends wear ring sealing ring, 37- front ends wear ring, 38- rear ends rotating ring, 39- rear ends spring case, after 40- End spring case positioning screw, 41- axle sleeve snap ring lock-screws, 42- muddy packing injection nuts, the I-shaped chamber that blocks of A, B- go out Entrance, C, D- cooling water entrance, Q- forward end seals face, H- back-end sealings face, J- radial ring seals face, K- peepholes.

Specific embodiment

Below according to the attached drawing in the present invention, the particular content of the present invention is necessarily illustrated：

It shown in Fig. 1, blocks meshing in chamber 6 and refers to be filled in muddy packing in I-shaped closure chamber, in figure, be sleeved on Rotating ring end face in front end movable ring structure 2 and the end face of front end stationary ring 3 on axle sleeve 1 constitute forward end seal face Q, and front end is in In the medium sealed, in figure, it is sleeved on the rotating ring end face in the rear end movable ring structure 12 on axle sleeve 1 and the end face of rear end stationary ring 7 The back-end sealing face H being in external environment is constituted, and muddy packing of the tight on 1 annular groove face of axle sleeve then constitutes Radial ring seal face J, the front end stationary ring sealing ring 4 on sealing shroud 5 had both prevented sealed medium from entering I-shaped closure Chamber 6 is also prevented from muddy packing and enters in the medium that is sealed from I-shaped closure chamber 6, while by 4 sets of front end stationary ring sealing ring Front end stationary ring 3 can also move axially back and forth, front end stationary ring 3 and sealing shroud 5 exist as the feather key anti-rotation drawn by figure connects Structure, thus stationary ring 3 will not phantom ring rotation, back-end sealing circle 8 is also installed on sealing shroud 5, it is to prevent pureed Filler is leaked into from I-shaped closure chamber in external environment, and the rear end stationary ring 7 being sleeved on back-end sealing circle 8 also can be in axial direction It is moved forward and backward, while front and back ends stationary ring 3,7 is back-to-back and connection is to prevent rear end stationary ring 7 from rotating in the form of convex-concave slot, together When convex-concave slot also formed and make cyclic annular rectangular enclosure connection up and down into the I-shaped slot for blocking chamber, L-shaped front and back ends stationary ring 3, 7 by the inner headed face of the annular surface of 4,8 sets of front and back ends stationary ring sealing ring and sealing shroud 5 to form above I-shaped closure chamber one horizontal Cyclic annular rectangular enclosure, and the annular surface of front and back ends stationary ring 3,7 internal diameters then formd with the grove shaped circumferential face of axle sleeve 1 it is I-shaped A horizontal cyclic annular rectangular enclosure below chamber is blocked, sealing shroud 5 and gland 11 are to be threadedly coupled, and are axially provided with ditch on contact surface I-shaped closure chamber entrance A, the B opened on slot and hole and gland 11 is communicated, while seam allowance sealing ring 10 is installed in 5 He of sealing shroud It at the axially facing surface of gland 11, prevents muddy packing from leaking from there, can be seen that from this figure：Front and back ends sealing surface of the present invention Q, H is the dynamic sealing end face of two mechanical seal, and end clearance only has 0.001~0.002 millimeter, and the solid of muddy packing At least 0.05~006 millimeter or so of filler its particle, thus be difficult to therefrom let out, and tight is in axle sleeve That the muddy packing in 1 annular groove is formed is then the longer cyclic annular dynamic sealing face J that gap is zero, when sealed medium is to leakage Go out, just must be by the gap of forward end seal face Q and the gap of radial ring seal face J after, could be from back-end sealing face H's Clearance leakage is fallen, and the gap of radial ring seal face J is zero, and sealed medium cannot get through at all, it only pushes pureed and fills out Material is gone through from the gap of back-end sealing face H, and muddy packing is since grain size is difficult to go through greatly, such sealed medium It is just difficult to have leaked, does not have to sealing oil system here it is the present invention and lean on the I-shaped technical principle for blocking chamber 6 and realizing zero leakage, this When in order to prevent back-end sealing face H there is dry friction and generate heat, spy be provided on gland 11 cooling water C, D entrance introduce cooling Water is cooled down, and the I-shaped double mechanical seal for blocking chamber of the band manufactured thereby using the present invention is without oil sealing system During system, zero leakage and safe and reliable, long-life operation can be also realized, and the mechanical seal structure of now commonly used oil sealing is assorted Oil sealing cannot be substituted with muddy packingIt is because the elastic element in these mechanical seal structures using oil sealing is all It is immersed in oil sealing, if elastic element will be made to be difficult to work normally, and make sealing to substitute oil sealing with muddy packing Failure and fail, and the I-shaped double mechanical seal for blocking chamber of this band of the present invention is just there is no this problem, also It is to have made substantial improvement in the structure of double mechanical seal；

Shown in Fig. 2, rear end stationary ring sealing ring 8 is not installed on sealing shroud 5 and is installed in gland 11 unlike Fig. 1 On, thus seam allowance sealing ring 10 is eliminated, I-shaped closure chamber A, B entrance that muddy packing can be outputed directly from gland 11 In into sealing shroud 5 and front and back ends stationary ring 3,7, front and back ends movable ring structure 2,12 and axle sleeve 1 form I-shaped closure chamber 6, in fact Existing zero leakage and safe and reliable, long-life operation, principle are identical with Fig. 1；

It is that the another kind of the I-shaped closure chamber 6 with the I-shaped double mechanical seal 17 for blocking chamber is made shown in Fig. 3 With method, i.e., I-shaped A, B entrance for blocking chamber 6 is connected with the suction inlet of jet pump 15, the injection of jet pump 15 Upper inlet regulating valve 16 is terminated, which is that high-pressure side is connected with equipment outlet, and sprays pump discharge 14 and then enter with equipment Mouth is that low-pressure end is connected, and I-shaped closure chamber is not to be filled with muddy packing at this time, but is made by the work of jet pump 15 It becomes vacuum state, because it is very little to leak into the I-shaped medium amount for blocking chamber from front end sealing surface Q, thus holds very much It is easily pumped, as long as regulate regulating valve 16 makes the pressure ratio ambient atmosphere of pressure vacuum gauge 18 force down a bit at this time , back-end sealing face H only prevents air from entering I-shaped closure chamber 6 just at this time, thus does not have to muddy packing, band at this time The I-shaped double mechanical seal for blocking chamber equally can also realize zero leakage, and safe and reliable, long-life operation, and rear end is close Cover H can prevent air from entering work completely in the case where cooling water is because of the seal cage of the rotation of rear end rotating ring and the formation of gland dustband 13 Font is blocked in chamber 6, thus the I-shaped double mechanical seal for blocking chamber of this band is using jet pump without muddy packing When can also realize zero leakage and safe and reliable, long-life operation, and use jet pump ratio much more cost effective using sealing oil system simplicity, And why not can realize sealing with the mode that this jet pump vacuumizes usually using the mechanical seal of oil sealingBecause usually Using the mechanical seal of oil sealing only have oil sealing pressure ratio sealed medium pressure it is big when could work normally, if to oil sealing chamber take out Vacuum, mechanical seal will fail, and a large amount of sealed mediums be made to be pumped or leak outside, this does not allow.

As described above, the present invention front and back ends sealing surface Q, H with the I-shaped double mechanical seal for blocking chamber must be able to Ensure that its gap is in the state of very little even zero always, and is compensated in time in the case where abrasion becomes larger, also It is to have good closed, this execution completely is in the setting feature of elastic element and front and back end movable ring structure 2,12：

Fig. 4 is the present invention I-shaped double mechanical seal for blocking chamber of the elastic element built-in type band on cantilever pump Structure diagram is placed elastic element 20 in the front springs box 19 in front end movable ring structure 2 and directly bears against front end face rotating ring On 21 backs, front end face rotating ring 21 is sleeved on front springs box 19 to slide back and forth and be connected with arc groove with it and prevents from rotating, Front end seal ring of moving ring 22 be leaked into the radial ringed gap for preventing sealed medium driven torus from coordinating with axle sleeve it is I-shaped It blocks in chamber but does not hinder sliding axially for rotating ring, front springs box 19 is by front springs box antirotation keys 30 and axle sleeve 1 Shoulder is located on axle sleeve 1；

In Fig. 4, rear end moving ring sleeve 26 and axle sleeve 1 in rear end movable ring structure 12 are to be threadedly coupled and determined with rear end moving ring sleeve Position screw 25 positions, and rear end wear ring 24 is a tight fit in rear end wear ring sealing ring 23 in the moving ring sleeve of rear end, and end face is with after The end face of end stationary ring 7 is adjacent to, and forms back-end sealing face H, and rear end seal ring of moving ring 27 is then to prevent muddy packing from being moved from rear end Ring set 26 and axle sleeve leak out in 1 connection screw thread gap；

As can be seen from Figure 4, front springs box 19, elastic element 20, front end rotating ring 21, front end stationary ring 3, rear end stationary ring 7, Rear end wear ring 24 and rear end moving ring sleeve 26 be join end to end go here and there be sleeved on it is on axle sleeve 1, since front springs box 19 is by preceding Shoulder in end spring case antirotation keys 30 and axle sleeve 1 is located on axle sleeve 1, as long as so rotation rear end moving ring sleeve 26 is by connection Front and back ends sealing surface Q, H can be adjacent to by screw thread, and it can be zero that can theoretically say its gap, and so end face will be by Very big power, and the dynamic and static ring end face being adjacent to will relatively rotate, thus the power being adjacent to must degree of having, this degree is by elasticity What the elastic force of element 20 was realized, so the rotation generation of rear end moving ring sleeve 26 is adjacent to power and the operating compression amount phase of elastic element 20 Rear end moving ring sleeve positioning screw 25 must just be tightened simultaneously, rear end moving ring sleeve 26 must not be allowed to remake axial movement, it is forward and backward at this time The pressure that two end faces, that is, Q, H sealing surface is subject to is collectively formed by elastic force and sealed medium pressure, that is, logical Often described end face seal pressure, as long as this pressure determines good, the mechanical seal of this rear and front end just can normally be run, The I-shaped effect for blocking chamber 6 is played again, and this double mechanical seal can be achieved with zero in the state of without sealing oil system Leakage and safe and reliable, long-life operation；

As can be known from Fig. 4, the I-shaped double mechanical seal for blocking chamber of the elastic element built-in type band uses axis Set is used on cantilever pump, and axle sleeve pad 29 and sleeve sealing circle 28 have been to prevent sealed medium between the cooperation of axle sleeve and axis Leakage effects in gap, axle sleeve 1 are fixed on axis by the step and key (being not drawn into figure) of axis；

Fig. 5 be the present invention in order to adapt to the demand of distinct device, it is special by the I-shaped chamber that blocks of elastic element built-in type band The axle sleeve 1 that double mechanical seal cantilever pump shown in Fig. 4 uses is changed to 1 matching used structure diagram of through type axle sleeve, The structure employs two sleeve sealing circles 28, and is individually placed to 1 rear and front end of axle sleeve, prevent sealed medium from axle sleeve 1 with It is leaked in the fit clearance of axis, axle sleeve 1 is then positioned by positioning of axle sleeve ring 31 and axle sleeve snap ring lock-screw 41 on axis, is sealed Axially position seat 32 is fixed on gland with positioning seat screw 33 as shown in figure 8, when mechanical seal is not used by rear end rotating ring Set positioning screw 25, which penetrates, will entirely seal locking in 32 hole of positioning seat, then should be by rear end after sealing fixes in equipment Moving ring sleeve positioning screw 25, which disengages, only to be play a part of to lock rear end moving ring sleeve 26, and the sealing is with regard to rotatably normal operation in this way , this change of axle sleeve 1 can increase the versatility, this mode is equally applicable to Fig. 6, sealing knot shown in Fig. 7 Structure；

Fig. 4, the I-shaped double mechanical seal for blocking chamber of elastic element built-in type band shown in fig. 5 is due to elastic element 20 are in sealed medium at runtime, thus the property of sealed medium just there are certain requirements, such as sealed medium It is corrosive or temperature is very high or is easy to coking etc. is likely to make the elastic failure of elastic element 20 and makes described seal Existing failure, so the I-shaped double mechanical seal for blocking chamber of this elastic element built-in type band applies in general to temperature and exists 200 DEG C hereinafter, under the process conditions of cleaning medium that corrosivity is not strong and medium is not easy coking.

Fig. 6 is that be used in sealed medium be high temperature to the present invention, strong corrosive, the elasticity to work under the bad working environments such as easy coking The I-shaped double-face mechanical sealing structure schematic diagram for blocking chamber of element fitted outside band, the cantilever pump shaft sleeve of adapted, front end rotating ring Structure 2 is located on axle sleeve 1 by 1 step of axle sleeve and front end moving ring sleeve holding screw 35 by front end moving ring sleeve 34, and front end is wear-resisting Ring 37 is sleeved in front end moving ring sleeve 34 and mixes front end wear ring sealing ring 36, and front end seal ring of moving ring 22 is mounted in front end moving ring sleeve Prevent sealed medium from being flowed into from 1 fit clearance of front end moving ring sleeve 34 and axle sleeve in I-shaped closure chamber 6 in 34 inner grooves, it is preceding The end face of end wear ring 37 and front end stationary ring 3, which is adjacent to, forms forward end seal face Q, and rear end movable ring structure 12 is by being sleeved on rear end spring case Rear end rotating ring 38 on 39 and the elastic element in rear end spring case 39 20 form, and rear end spring case 39 and axle sleeve 1 use It is threadedly coupled and by 40 locking positioning of rear end spring case positioning screw, rear end seal ring of moving ring 27 is to prevent muddy packing from rear end For spring case 39 with being leaked out in the gap of 1 connection screw thread of axle sleeve, the end face of rear end rotating ring 38 and the end face of rear end stationary ring 7 are adjacent to composition The power that is adjacent to of back-end sealing face H, former and later two sealing surfaces Q, H will be elastic by connection screw thread by rotation rear end spring case 39 Element 20 is compressed to specified decrement and provides, and plays the I-shaped sealing function for blocking chamber 6 again in this way, is sealed just described in Fig. 6 Energy normal operation, the elastic element 20 for the double mechanical seal for blocking chamber since elastic element fitted outside band is I-shaped is place In the environment of air and cooling water, therefore regardless of the property of sealed medium, elastic element 20 is in good ring It is run in border, can apply the power that is adjacent to end face always under the cooperation of pressure medium, as because working long hours, sealing surface Q, H Can wear, the decrement of elastic element 20 will be discharged and be become smaller at this time, that is, elastic element 20 can extend and elastic force can subtract It is small, at this time in order to prevent elastic force it is too small and make sealing surface Q, H be adjacent to power it is too small and open generate seal failure, then may be used at this time Rear end spring case 39 is further screwed, the decrement of elastic element 20 is made to be restored to reset condition, is sealed with described in this explanation Good online repair ability, this is good performance to ensureing the reliable long-life operation of equipment safety, actually this performance In Fig. 4, all exist in Fig. 5 and the I-shaped double-face mechanical sealing structure for blocking chamber of following bands shown in Fig. 7.

Fig. 7 is that the present invention is close with the I-shaped double mechanical for blocking chamber of the elastic element standing type band on high-speed equipment Seal structure schematic diagram, as shown in the figure, and with cantilever pump shaft sleeve configuration, used two groups of elastic elements 20, one group of elastic element 20 are installed on sealing shroud 5 to act on front end stationary ring 3 and are allowed to and before front end wear ring 37 on front end moving ring sleeve 34 forms Sealing surface Q is held, another group of elastic element 20 is then allowed to and mounted in rear end moving ring sleeve 26 effect of rear end stationary ring 7 on gland 11 On rear end wear ring 24 form back-end sealing face H, the I-shaped double mechanical seal for blocking chamber of the band that is configured in this way due to Elastic element 20 will not be servo-actuated ring structure rotate together but it is static be placed on sealing shroud 5 and gland 11, can thus avoid Because high-speed rotation influences the using effect of elastic element 20, so as to ensure the stability of end face seal performance, thus I-shaped envelope The sealing function of stifled chamber 6 can equally be guaranteed.

Below with shown in Fig. 5 and through type axle sleeve adapted elastic element built-in type band it is I-shaped block chamber Double End machine For tool sealed structural representation, described install and use is described further：

Front springs box antirotation keys 30 are put into the keyway of 1 front end of axle sleeve, are put on bullet after 18 dropping place of front springs box Property element 20 is put into box, then front end seal ring of moving ring 22 is put into the ring seal ring recess of front end, and be coated with profit on it Lubricating oil；

Front end rotating ring 21 is sleeved on axle sleeve 1 to be inserted into front springs box 19 upper anti-rotation groove and pushes down elastic element 20, The front end movable ring structure 2 is just constituted in this way；

Axle sleeve 1 is put on the table upwards vertically together together with front end movable ring structure 2, at this time the end face of front end rotating ring 21 Upward, then front end stationary ring 3 is sleeved on axle sleeve 1 and put down, stick its end face and the end face of front end rotating ring 21, end face should be protected at this time Card cleans and is coated with lubricating oil；

Front end stationary ring sealing ring 4 is put into the front end stationary ring seal groove of sealing shroud 5, then the anti-rotation on sealing shroud 5 Sealing shroud 5 is sleeved on front end stationary ring 3 by tooth against the anti-rotation groove opened on front end stationary ring 3, and front end stationary ring sealing ring 4 should be coated at this time Lubricating oil is so that front end stationary ring 3 can slide up and down；

Gland 11 is connected and tightened using screw thread and sealing shroud 5；

Rear end stationary ring sealing ring 8 is put into the rear end stationary ring seal groove of gland 11 and coats lubricating oil, then rear End stationary ring 7 is inserted and makes the tooth socket at the back of front and back end stationary ring 3,7 to be harmonious, and can prevent rear end stationary ring 7 from rotating and mud Shape filler leaves slot channel；

Rear end seal ring of moving ring 27 is put on axle sleeve 1 in rear end ring seal ring recess, as shown in Figure 10, muddy packing Injection nut 42, which is screwed on axle sleeve 1, compresses elastic element 20, front end rotating ring 21, front end stationary ring 3 and rear end stationary ring 7, makes axis Feel there is certain clamp force to be advisable when applying mechanically hand rotation, to ensure that front end face Q is adjacent to；

I-shaped closure chamber entrance A, B on gland 11 connect glue injection machine and inject muddy packing, marginal not side rotation axis Set 1 is to ensure implantation quality, until having muddy packing to emerge in the peephole K from muddy packing injection nut 42；

Muddy packing injection nut 42 is removed, gland dustband 22 is put into the dust-proof ring recess of gland 11 and by after Lubricating oil is coated after cleaning out in the end face of end stationary ring 7；

Rear end moving ring sleeve 26 equipped with rear end wear ring 24, rear end wear ring sealing ring 23 is loaded onto to tighten and reaches elastic member As defined in part 20 subject to decrement, under normal condition, the rear ends of rear end moving ring sleeve 26 are concordant with the shoulder of axle sleeve 1 such as at this time Shown in Fig. 5, rear end moving ring sleeve positioning screw 25 two is symmetrically tightened, the screw there are 4 under normal circumstances, at this time rotary axle box 1 And suitably supplement injection muddy packing makes the rotary resistance of axle sleeve 1 can be by glue injection machine from the I-shaped of gland 11 after being increased It blocks to unload on chamber entrance A, B and be closed Bing being blocked up Yong Silk；

Sealing axially position seat 32 is screwed in positioning seat screw 33 on gland 11, as Fig. 8 shows, then with remaining two rear ends Moving ring sleeve positioning screw 25 is inserted into its hole and is screwed on rear end moving ring sleeve 26, and the axial position of sealing described so just fixes , certain axle sleeve 1 can not have rotated；

Two valve positioning of axle sleeve rings 31 are closed in the slot of 1 tail portion of axle sleeve and are lockked with axle sleeve snap ring lock-screw 41 but not With tighten and ensure it will not loosen can, the described at this time entire integrated assembling of sealing just completes；

It is described collect install to be sealingly mounted at step in equipment as follows：

Two pieces sleeve sealing circle 28 is attached separately in former and later two sleeve sealing ring recess of axle sleeve 1 and coats corresponding profit Consistent lubricant, while also gland ring 9 is placed in corresponding slot；

The sealing shroud is pushed into through examining in qualified annular seal space, and gland 11 is used on gland bolt band on axis, But it should not tighten, only can just be tightened after axis is completely fixed in place；

After gland bolt is tightened, two rear end moving ring sleeve positioning screws in 32 hole of sealing axially position seat will be previously-inserted 25 take out, and axle sleeve snap ring lock-screw 41 is tightened, and such axle sleeve 1 can be just fixed on axis, had rotated with axis, examine Method is to stir axle sleeve positioning snap ring 31, and axis can rotate with it, and two rear end moving ring sleeve positioning screws 25 of taking-up are twisted at this time Tightly on rear end moving ring sleeve 26, further it is fixed；

Cooling water entrance C, D on gland 11 is accessed into cooling water pipe, being passed through described in cooling water to seal just can normally transport Row.

The above, only one is increased in common double-face mechanical sealing structure is clipped in two sealings to the present invention I-shaped closure chamber between end face double mechanical seal is just made to eliminate sealing oil system when in use and can realize zero leakage and Safe and reliable long-life operation, can not only bring better economic benefit, and can meet higher environmental protection to user It is required that as long as while also illustrate that content according to the present invention can develop many kinds with the I-shaped double mechanical for blocking chamber Seal specification kind to come, thus these the Bianization Huo Ti Change that can readily occur in, also should all cover protection scope of the present invention it It is interior.Therefore, protection scope of the present invention should be subject to the protection scope in claims.

Claims

1. a kind of I-shaped double mechanical seal for blocking chamber of band, it is characterised in that：The I-shaped both-end for blocking chamber of the band Face mechanical seal is by axle sleeve, front end movable ring structure, front end stationary ring, sealing shroud, rear end stationary ring, rear end movable ring structure, gland and auxiliary Sealing element is helped to form；

The front end stationary ring and rear end stationary ring under the cooperation of front and back ends stationary ring sealing ring back-to-back insertion by sealing shroud and pressure It covers in the cavity being combined into, front and back ends stationary ring is L-shaped, forms a rectangle with sealing shroud inner headed face after connection back-to-back Ring cavity, on the sealing shroud, rear end stationary ring sealing ring is assemblied on gland the front end stationary ring sealing ring, sealing shroud and Gland is to be threadedly coupled；

The inner headed face of the front and back ends stationary ring is then and the axle sleeve with spill ring-type periphery forms the ring of a longer rectangle Shape cavity；

The position that the front and back ends stationary ring leans against back contacts, which is provided with slot, communicates the ring cavity of upper and lower two rectangles, is formed I-shaped closure chamber；

The I-shaped chamber that blocks is by the rotating ring or wear ring and front and back ends that are assemblied in the front and back ends movable ring structure on axle sleeve End face seal face Q, H that the end face of stationary ring is formed are closed；

It is provided on the gland and is communicated for entrance A, B that muddy packing fills by sealing shroud and I-shaped closure chamber, it will be each Kind of muddy packing be injected into I-shaped closure chamber neutralize former and later two end face seal faces Q, H together form a spill move it is close Seal structure；The sealing shroud and gland also add a seam allowance sealing ring when being threadedly coupled.

2. as described in claim 1 with the I-shaped double mechanical seal for blocking chamber, it is characterised in that：Front end movable ring structure By the front springs box, elastic element, rotating ring, seal ring of moving ring and the front springs box antirotation keys group that are sleeved on the axle sleeve front end Into the rear end movable ring structure is by rear end wear ring sealing ring, rear end wear ring, rear end moving ring sleeve positioning screw, rear end rotating ring Set and rear end seal ring of moving ring composition, the rear end moving ring sleeve and the axle sleeve are determined using threaded connection and by rear end moving ring sleeve Thus position screw positioning forms the I-shaped double mechanical seal for blocking chamber of elastic element built-in type band.

3. as described in claim 1 with the I-shaped double mechanical seal for blocking chamber, it is characterised in that：Front end movable ring structure It is by front end moving ring sleeve, front end moving ring sleeve holding screw, front end wear ring sealing ring, front end wear ring and seal ring of moving ring group Into, the front end moving ring sleeve is located on the axle sleeve by the step of the axle sleeve and the front end moving ring sleeve holding screw, The rear end movable ring structure is by the elastic element, rear end rotating ring, rear end seal ring of moving ring, the rear end spring that are mounted in the spring case of rear end Box positioning screw forms, and the rear end spring case is connected with the sleeve thread and determined by the rear end spring case positioning screw Thus position forms the I-shaped double mechanical seal for blocking chamber of elastic element fitted outside band.

4. as described in claim 1 with the I-shaped double mechanical seal for blocking chamber, it is characterised in that：The sealing shroud and Installation has elastic component between the gland, and front end movable ring structure is by front end moving ring sleeve, front end moving ring sleeve holding screw, front end Wear ring and seal ring of moving ring composition, the front end moving ring sleeve are to be located in axis by axle sleeve step and front end moving ring sleeve holding screw It puts on, the rear end movable ring structure is close by rear end wear ring, rear end moving ring sleeve positioning screw, rear end moving ring sleeve and rear end rotating ring Seal forms, and thus rear end moving ring sleeve and axle sleeve form bullet using being threadedly coupled and being positioned by rear end moving ring sleeve positioning screw Property element standing type band it is I-shaped block chamber double mechanical seal.

5. the I-shaped double mechanical seal for blocking chamber of band as described in any one of claim 2-4, it is characterised in that：Axis Set is that cantilever pump uses axle sleeve, and positioning of axle sleeve ring and axle sleeve snap ring locking screw should be added when axle sleeve uses through type axle sleeve Nail, seal groove is opened to fill sleeve sealing circle in sleeve diameter front and back end respectively.

6. the I-shaped double mechanical seal for blocking chamber of band as described in any one of claim 2-4, it is characterised in that：Institute It is packaging type structure to state with the I-shaped double mechanical seal for blocking chamber, is fixed on the gland with positioning seat screw close Axially position seat is sealed, rear end moving ring sleeve positioning screw or rear end spring case positioning screw are penetrated in positioning bore will be entirely with work Font blocks the double mechanical seal locking of chamber, when fixed in equipment with the I-shaped double mechanical seal for blocking chamber Rear end moving ring sleeve positioning screw or rear end spring case positioning screw should then be disengaged after good, lock rear end moving ring sleeve or rear end spring Box.