CN206206593U

CN206206593U - Combined mechanical sealing device and side-feeding mixer

Info

Publication number: CN206206593U
Application number: CN201621157540.1U
Authority: CN
Inventors: 方志安; 孙邦国
Original assignee: Shanghai Force Fluid Equipment Co Ltd
Current assignee: Shanghai Force Fluid Equipment Co Ltd
Priority date: 2016-10-25
Filing date: 2016-10-25
Publication date: 2017-05-31
Anticipated expiration: 2026-10-25

Abstract

The utility model discloses combined mechanical sealing device, side-feeding mixer, seat and the mechanical sealing assembly detachably connected with machine envelope seat are sealed including machine, also include the self-locking cone for coordinating and pressing close to mechanical sealing assembly with machine envelope seat, O-ring seals are arranged with the conical surface of self-locking cone；Under first state, the conical surface and O-ring seals of self-locking cone are separated with the conical inboard wall face of machine envelope seat, and liquid medium carries out dynamic sealing by mechanical sealing assembly；Under second state, the conical surface and O-ring seals of self-locking cone are fitted with the conical inboard wall face of machine envelope seat, realize the static sealing of liquid medium.The utility model realizes effective sealing of the side-feeding mixer under running status and service mode, two kinds of sealing structures rationally, handover convenience, be conducive to improving the service life of seal member, it is easy to online replacing to seal and improve sealing reliability when changing sealing, so as to ensure that the reliability of whole set equipment.

Description

Combined mechanical sealing device and side-feeding mixer

Technical field

The utility model is related to sealing device, the side-feeding mixer using the sealing device, more particularly to a kind of combination Formula mechanically-sealing apparatus, side-feeding mixer.

Background technology

Mixing plant as the industries such as oil, chemical industry, food, papermaking, environmental protection main corollary equipment, in industrial production In have a wide range of applications, and side-feeding mixer is due to its special application scenario, the side such as its mixing effect, equipment dependability Face is even more important.

Mechanical seal (mechanical seal) refer to by least one pair of perpendicular to rotation axis end face in Fluid pressure With laminating is kept in the presence of compensation mechanism elastic force and under the cooperation of auxiliary seal and constitute with respect to slip prevent fluid The device of leakage, it is vital part in side-feeding mixer, and its running status has to the performance of side-feeding mixer Certain influence.

The sealing structure of the side-feeding mixer of domestic agitator manufacturing enterprise production is generally close using double mechanical Envelope, or single mechanical seal, without bearing, double-face mechanical sealing structure is relative complex, without the single mechanical seal of rotating shaft, Stationary ring, rotating ring are fragile, need to change, repair or more when these mechanical seal structures damage occur in parts such as stationary ring, rotating rings When changing whole mechanical seal, it is impossible to effectively seal against pot liquid, so as to the problem for causing liquid leakage occurs.

The sealing structure of the side-feeding mixer of international agitator manufacturing enterprise production is usually located at very deep in tank Position, is not easy in the operation conditions of observation mechanical seal, and when mechanical seal damage or parts damages, mechanical seal is difficult Change, also have plenty of because the internal structure of mechanical seal is excessively complicated, dismounting inconvenience causes to be difficult to repair, and increased operation Difficulty.

Utility model content

The purpose of this utility model is exactly to solve the above-mentioned problems in the prior art, there is provided a kind of composite machine Tool sealing device, the side-feeding mixer using the combined mechanical sealing device.

The purpose of this utility model will be achieved by the following technical programs：

Combined mechanical sealing device, including it is coaxial be configured to machine envelope seat and with the machine envelope seat it is detachably connected Mechanical sealing assembly, also including the self-locking cone for coordinating and pressing close to the mechanical sealing assembly with machine envelope seat, it is described from O-ring seals are arranged with the conical surface for locking cone；

Under first state, the conical surface and O-ring seals of the self-locking cone are separated with the conical inboard wall face of machine envelope seat, Liquid medium carries out dynamic sealing by mechanical sealing assembly；

Under second state, the conical surface and O-ring seals and the conical inboard wall face of machine envelope seat of the self-locking cone are pasted Close, realize the static sealing of liquid medium.

Preferably, described combined mechanical sealing device, wherein：The mechanical sealing assembly includes axle sleeve, the axle Set is arranged with least one axle away from locking plate is set with one end outer wall of the self-locking cone on the madial wall of the axle sleeve Set sealing ring, is provided with rotating ring on the lateral wall of the axle sleeve, the region that the rotating ring is contacted with axle sleeve flange passes through an O shapes Circle sealing, the rotating ring is close to stationary ring away from one end of the self-locking cone, leads between the stationary ring and the contact surface of fixture Cross and spring is provided between the second seal with O ring, and their gap, the fixture sets away from one end of the self-locking cone The self-aligning bearing of support applications is equipped with, seal, the seal and the axle sleeve are set with the outer wall of the self-aligning bearing It is affixed.

Preferably, described combined mechanical sealing device, wherein：The axle sleeve is near one end of the self-locking cone Gap is provided with two sleeve sealing circles on madial wall.

Preferably, described combined mechanical sealing device, wherein：Two end face sides of the self-aligning bearing are respectively provided with There is the bearing enclosure for preventing liquid medium from entering self-aligning bearing.

Preferably, described combined mechanical sealing device, wherein：Also include for detecting that the mechanical sealing assembly is close Whether the conical surface and O-ring seals and machine envelope seat of envelope property and the detection self-locking cone realize liquid medium static sealing Detection means, the detection means is arranged on the mechanical sealing assembly, and seals seat and mechanical sealing assembly with the machine Between cavity connection.

Preferably, described combined mechanical sealing device, wherein：The detection means is disposed on the fixture Leak detection atmospheric valve, the cavity set on the fixture between connection machine envelope seat and mechanical sealing assembly is vented with leak detection The passage of valve.

Side-feeding mixer, including rotating shaft, one end that the rotating shaft is extended in tank body are provided with agitating paddle, the rotating shaft One end connection drive mechanism outside the tank body, also including any of the above-described combined mechanical sealing device, the machine envelope Cover for seat is arranged on the mounting flange at the tank wall in the rotating shaft and by frame, and the self-locking cone is fixed On the outer wall of the rotating shaft and through the opening of the mounting flange, under normality, the conical surface and the peace of the self-locking cone The opening for filling flange separates.

Preferably, described side-feeding mixer, wherein：The drive mechanism includes the transmission of connection coaxial with rotating shaft Wheel, the drive connects driving wheel by transmission belt, and the central point connection motor of the driving wheel, the drive mechanism is also wrapped Include the protective cover of the covering drive, driving wheel and conveyer belt.

Preferably, described side-feeding mixer, wherein：The both sides Ce Bi ends of the protective cover are provided with some ventilations Hole.

The advantage of technical solutions of the utility model is mainly reflected in：

The utility model deft design, by mechanical sealing assembly improve and having combined self-locking cone, by whole The cooperation of body structure, realizes side-feeding mixer effective sealing under operation, using self-locking using mechanical sealing assembly Effective sealing of the side-feeding mixer under service mode is realized in the cooperation of centrum and machine envelope seat, and two kinds of sealing structure switchings are just Profit, coordinates freely, and such structure arrangement more rationally, is conducive to improving the service life of seal member, is easy to online replacing Sealing reliability when sealing is changed in sealing and raising, so as to ensure that the reliability of whole set equipment.

Mechanical sealing assembly is the single mechanical end face seal of compact conformation in the utility model, and integral seal structure is more simple It is clean, mechanical sealing assembly band axle sleeve structure be easy to it is overall removed from machine inside, and before the sealing surface of mechanical sealing assembly without It is any to cause the valve mechanism of leakage, it is to avoid because maloperation causes leakage；Further, mechanical sealing assembly band aligning axle Hold, to be conducive to mitigating and radially wobble impact to rotating ring, stationary ring in seal assembly, prolonged mechanical sealing group in rotating shaft running The life-span of part.

Whole mechanical sealing assembly is located at mounting flange outside, is easy to observation operation conditions and is safeguarded.

The conical surface self-locking centrum big by setting sealing area, and band sealing O type circles, can farthest ensure quiet The effect of state sealing, it is to avoid leakage.

Behind the stationary ring of mechanical sealing assembly equipped with detection self-locking seal detection atmospheric valve, can maintenance, more When changing mechanical sealing assembly, it is ensured that the reliability of hydraulic seal under service mode.

Brief description of the drawings

Fig. 1 is the structural representation of the utility model side-feeding mixer；

Fig. 2 is the enlarged drawing in C regions in Fig. 1.

Specific embodiment

The purpose of this utility model, advantage and feature, will carry out figure by the non-limitative illustration of preferred embodiment below Show and explain.These embodiments are only the prominent examples for applying technical solutions of the utility model, all to take equivalent or wait Effect conversion and the technical scheme that is formed, all fall within the utility model it is claimed within the scope of.

The utility model disclose combined mechanical sealing device, as shown in Figure 2, including it is coaxial be configured to machine envelope seat 1, Mechanical sealing assembly 2, self-locking cone 3, the machine envelope seat 1 include annular body, and its centre bore at least includes the round slot bore of connection Area and conical porose area, and the circular groove porose area the small end opening diameter with diameter greater than the conical porose area, the circle The small end open side of taper porose area sets and is detachably connected the mechanical sealing assembly 2 with machine envelope seat 1, and the machinery is close The members of sealing assembly 2 are embedded in the circular groove porose area and when they are sleeved on axle, and they cooperatively form one together Individual closed cavity.

The self-locking cone 3, in the present embodiment, the self-locking cone 3 generally circular cone are set in the conical porose area Platform shape, and the big end opening with diameter greater than the conical porose area of its side wide diameter, the conical surface 31 of the self-locking cone 3 On be arranged with O-ring seals 4, the conical surface 31 and O-ring seals 4 of the self-locking cone 3 can be with the inwalls of the conical porose area Separate or fit,

Under first state, the conical surface 31 and O-ring seals 4 of the self-locking cone 3 seal the conical inboard wall face of seat 1 with the machine Separate, liquid medium carries out dynamic sealing by mechanical sealing assembly 2；

Under second state, the conical surface 31 and O-ring seals 4 of the self-locking cone 3 seal the conical inboard wall of seat 1 with the machine Face is fitted, and realizes the static sealing of liquid medium.

Specifically, in the present embodiment, the mechanical sealing assembly 2 is single mechanical end face seal component, and it includes axle sleeve 21, The axle sleeve 21 passes through locking screw away from locking plate 22, the locking plate 22 is set with one end outer wall of the self-locking cone 3 Bolt 230 is anchored on axle sleeve 21, at least one sleeve sealing circle 23 is arranged with the madial wall of the axle sleeve 21, so as to realize axle Static sealing between set 21 and its axle being arranged, it is preferred that the sleeve sealing circle 23 is that two and gap are set, their positions In the axle sleeve 21 on the madial wall of one end of the self-locking cone 3, the sleeve sealing in other embodiments certainly The position of circle 23 and quantity can also be configured according to actual needs.

Also, the axle sleeve 21 is provided with rotating ring 24, the rotating ring 24 on one end lateral wall of the self-locking cone 3 The surface contacted with axle sleeve flange 211 is sealed by least one first O-rings 25, and the rotating ring 24 is driven by the axle sleeve 21 It is dynamic, and the rotating ring 24 is close to the portion end surface of stationary ring 26, the rotating ring 24 and stationary ring 26 away from one end of the self-locking cone 3 Relative can slide, the stationary ring 26 is fitted with a fixture 260, it passes through the 2nd O and the contact surface of the fixture 260 between Shape circle 28 is sealed, and the stationary ring 26, the groove of fixture 260 and the gap location between them set a stop pin, described The periphery of stop pin is set with spring 27, and the two ends of the spring 27 are separately fixed at the outer wall and the groove of the stationary ring 24 In, the fixture 260 is provided with the self-aligning bearing 29 of support applications, the aligning axle away from one end of the self-locking cone 3 Two end face sides for holding 29 are separately provided for the bearing enclosure 220 for preventing liquid medium from entering self-aligning bearing, so as to exchange Heart bearing 29 is protected.

Why self-aligning bearing 29 is set, is allowed for, mechanical sealing assembly of the present utility model 2 is applied into side-feeding type When in agitator, because the blade end of side-feeding mixer is cantilever design, operation rotating shaft can radially wobble, rotating shaft Radially wobble can be in impulse machine seal assembly rotating ring 24, stationary ring 26, cause mechanical sealing assembly 2 damaged and fail, because This radially wobbles influence to the service life of mechanical sealing assembly 2 to reduce rotating shaft, so having added bearing to control in sealing The system amount of radially wobbling.

Seal 210, the diameter of the seal 210 and the fixture are set with the outer wall of the self-aligning bearing 29 260 maximum gauge is identical, and the seal 210 is fitted by fixing bolt 240 with the axle sleeve 21 and fixture 260, institute The side wall that seal 210 is stated away from the self-locking cone 3 is concordant with the distal side wall of the axle sleeve 21, and described solid Determine to be additionally provided with the sealing ring being sleeved in the rotating shaft 5 between bolt 240 and seal 210.

Certainly, in other embodiments, the mechanical sealing assembly can also be various known double mechanical seals Component, herein, double mechanical seal component is known technology, therefore is repeated no more.

Further, the combined mechanical sealing device also include for detect the mechanical sealing assembly sealing and Whether the conical surface 31 and O-ring seals 4 and machine envelope seat 1 for detecting the self-locking cone 3 realize liquid medium static sealing Detection means, in the present embodiment, preferably described detection means is disposed on the axle sleeve 21 of the mechanical sealing assembly 2, and with The leak detection atmospheric valve 250 of the cavity connection between the machine envelope seat 1 and mechanical sealing assembly 2, it is furthermore preferred that the leak detection emptying Valve 250 is located on the fixture 260 at the rear portion of the stationary ring 26, and connection machine envelope seat 1 and the machine are set on the fixture 260 The passage of cavity and leak detection atmospheric valve 250 between tool seal assembly 2.

Certainly in other embodiments, the position of the leak detection atmospheric valve 250 can also be other feasible positions, meet Its detection function, will not be repeated here.

The leak detection atmospheric valve 250 can detect the validity of the static sealing of self-locking cone 3 and machine envelope seat 1, can also examine Survey the sealing by maintenance or the mechanical sealing assembly 2 changed；Such that it is able to before mechanical sealing assembly maintenance is changed, confirm Whether the static sealing of self-locking cone 3 and machine envelope seat 1 comes into force, so as to avoid but carrying out mechanical seal due to unrealized static sealing Caused leakage problem is changed in the maintenance of component 2, and after mechanical sealing assembly 2 is repaired or changed, it is ensured that mechanical seal group The validity of part dynamic sealing.

The utility model further discloses a kind of side-feeding mixer, as shown in Figure 1, including rotating shaft 5, the rotating shaft 5 one end extended in tank body 6 are provided with agitating paddle 7, and the rotating shaft 5 is located at one end connection drive mechanism outside the tank body 6 8, the drive mechanism 8 can be known various driving structures, and the preferred drive mechanism 8 includes and rotating shaft in the present embodiment The drive of 5 coaxial connections, the drive connects driving wheel, the central point connection motor of the driving wheel by transmission belt 81。

Because side-feeding mixer is often under the environment such as high humility, highly corrosive, cause the part such as transmission belt pole Perishable damage, it is therefore desirable to suitably protected the part in the drive mechanism 8, especially transmission belt, so, it is described Drive mechanism also 8 also includes the protective cover 82 of the covering drive, driving wheel and conveyer belt, also, in the protective cover 82 Both sides Ce Bi ends be provided with some passages 83, to facilitate in protective cover 82 malaria to circulate.

The side-feeding mixer also includes combinations of the above formula mechanically-sealing apparatus 10, and the machine envelope seat 1 is sleeved on institute State in rotating shaft 5 and be arranged on the mounting flange 11 set at the outer wall of the tank body 6 by with its bolted frame 9, institute Self-locking cone 3 is stated to be installed on the outer wall of the rotating shaft 5 and through the opening of the mounting flange 11, and the self-locking centrum 3 can weld or be bolted to the structure in the rotating shaft 5, or with the one of the rotating shaft 5, and preferably they are Welding or the structure of one；Under normality, i.e., side-feeding mixer run well when, the conical surface 31 of the self-locking cone 3 with it is described The opening of mounting flange 11 separates, so that when the follow-up maintenance for carrying out mechanical sealing assembly 2 is changed, the rotating shaft 5 has Certain mobile space.

When the combined sealing component maintenance of side-feeding mixer of the present utility model is changed, comprise the following steps：

S1, after stopping side-feeding mixer, dismantling the drive mechanism 8 may move the rotating shaft 5, in the present embodiment, Needs remove the protective cover 82, conveyer belt, drive successively, now, due to the structure limit without the drive mechanism 8 System, the rotating shaft 5, to movement, can drive the rotating shaft 5 to be moved along A directions along the A of diagram to B, make self-locking cone 3 towards institute Machine envelope seat 1 direction is stated to move and make its conical surface 31 and the conical inboard wall face conflict realization of O-ring seals thereon 4 and machine envelope seat 1 The static sealing of liquid medium, now as the second state.

S2, now, opens the leak detection atmospheric valve 250, checks whether static sealing enters into force.

S3, after confirming that static sealing comes into force, unclamps the locking plate 22 and clamping screw 230, dismantles fixing bolt 240, Now, the mechanical sealing assembly 2 can be moved integrally along rotating shaft 5, make the entirety of mechanical sealing assembly 2 along A directions from rotating shaft 5 Unload, carry out the maintenance or replacing of mechanical sealing assembly 2, the mainly maintenance of sleeve sealing circle 23, rotating ring 24 and stationary ring 26 Or change.

S4, after completing the maintenance of mechanical sealing assembly 2 or changing, mechanical sealing assembly 2 after maintenance or replacing is covered again It is assembled on machine envelope seat 1 in rotating shaft 5 and to the movement of B directions, then along B directions mobile shaft 5, makes the self-locking cone 3 The conical surface 31 and the conical inboard wall face of O-ring seals 4 and machine envelope seat 1 separate, then be fastened and fixed bolt 240, lock locking plate 22 With clamping screw 230, the mechanical sealing assembly 2 is set to be fixed with the rotating shaft 5, now as first state.

Whether S5, the sealing for opening the leak detection detection mechanical sealing assembly 2 of atmospheric valve 250 is intact, after confirmation is intact, will be described Drive mechanism 8 is installed in place.

The utility model still has numerous embodiments, all use equivalents or equivalent transformation and all technologies for being formed Scheme, all falls within protection domain of the present utility model.

Claims

1. combined mechanical sealing device, it is characterised in that：Machine envelope seat is configured to including coaxial（1）And seal seat with the machine （1）Detachably connected mechanical sealing assembly（2）, also including sealing seat with the machine（1）Coordinate and with the mechanical seal group Part（2）The self-locking cone pressed close to（3）, the self-locking cone（3）The conical surface（31）On be arranged with O-ring seals（4）；

Under first state, the self-locking cone（3）The conical surface（31）And O-ring seals（4）Seat is sealed with the machine（1）Taper in Wall is separated, and liquid medium passes through mechanical sealing assembly（2）Carry out dynamic sealing；

Under second state, the self-locking cone（3）The conical surface（31）And O-ring seals（4）Seat is sealed with the machine（1）Taper in Wall is fitted, and realizes the static sealing of liquid medium.

2. combined mechanical sealing device according to claim 1, it is characterised in that：The mechanical sealing assembly（2）Bag Include axle sleeve（21）, the axle sleeve（21）Away from the self-locking cone（3）One end outer wall on be set with locking plate（22）, the axle Set（21）Madial wall on be arranged with least one sleeve sealing circle（23）, the axle sleeve（21）Lateral wall on be provided with rotating ring （24）, the rotating ring（24）With axle sleeve flange（211）The region of contact passes through the first O-ring（25）Sealing, the rotating ring（24） Away from the self-locking cone（3）One end be close to stationary ring（26）, the stationary ring（26）With fixture（260）Contact surface between lead to Cross the second O-ring（28）Sealing, and it is provided with spring between their gap（27）, the fixture（260）Away from it is described from Lock cone（3）One end be provided with the self-aligning bearing of support applications（29）, the self-aligning bearing（29）Outer wall on be set with it is close Feng Ti（210）, the seal（210）With the axle sleeve（21）It is affixed.

3. combined mechanical sealing device according to claim 2, it is characterised in that：The axle sleeve（21）Described in certainly Lock cone（3）One end madial wall on gap be provided with two sleeve sealing circles（23）.

4. combined mechanical sealing device according to claim 2, it is characterised in that：The self-aligning bearing（29）Two End face side is separately provided for the bearing enclosure for preventing liquid medium from entering self-aligning bearing（220）.

5. according to any described combined mechanical sealing devices of claim 2-4, it is characterised in that：Also include for detecting institute State mechanical sealing assembly sealing and detect the self-locking cone（3）The conical surface（31）And O-ring seals（4）Sealed with the machine Seat（1）Whether the detection means of liquid medium static sealing is realized, the detection means is arranged at the mechanical sealing assembly（2） On, and seal seat with the machine（1）And mechanical sealing assembly（2）Between cavity connection.

6. combined mechanical sealing device according to claim 5, it is characterised in that：The detection means is disposed on institute State fixture（260）On leak detection atmospheric valve（250）, the fixture（260）It is upper that the connection machine envelope seat is set（1）And machinery Seal assembly（2）Between cavity with leak detection atmospheric valve（250）Passage.

7. side-feeding mixer, including rotating shaft（5）, the rotating shaft（5）Extend to tank body（6）Interior one end is provided with agitating paddle （7）, the rotating shaft（5）Positioned at the tank body（6）Outer one end connection drive mechanism（8）, it is characterised in that：Will also including right Seek any described combined mechanical sealing devices of 1-6（10）, the machine envelope seat（1）It is sleeved on the rotating shaft（5）Go up and pass through Frame（9）Installed in the tank body（6）Mounting flange at outer wall（11）On, the self-locking cone（3）It is installed in the rotating shaft （5）Outer wall on and through the mounting flange（11）Opening, under normality, the self-locking cone（3）The conical surface and the peace Dress flange（11）Opening separate.

8. side-feeding mixer according to claim 7, it is characterised in that：The drive mechanism（8）Including common with rotating shaft The drive of axle connection, the drive connects driving wheel, the central point connection motor of the driving wheel by transmission belt（81）, The drive mechanism（8）Also include the protective cover of the covering drive, driving wheel and conveyer belt（82）.

9. side-feeding mixer according to claim 8, it is characterised in that：The protective cover（82）Both sides Ce Bi ends It is provided with some passages（83）.