CN201443592U

CN201443592U - Combined device for sealing rotary shaft

Info

Publication number: CN201443592U
Application number: CN2009200265261U
Authority: CN
Inventors: 张华帮; 姜淑珍; 张冶
Original assignee: Weifang Shihua Chemical Co Ltd
Current assignee: Weifang Shihua Chemical Co Ltd
Priority date: 2009-05-30
Filing date: 2009-05-30
Publication date: 2010-04-28
Anticipated expiration: 2019-05-30

Abstract

The utility model discloses a combined device for sealing a rotary shaft. The combined device comprises a mechanical sealing part and a filler sealing part that are coaxially arranged, wherein the mechanical sealing part and the filler sealing part are fixedly connected with each other in the axial direction. The combined device for sealing the rotary shaft is not easy to abrade and has good sealing effect in devices in which a gaseous phase material, a liquid phase and a solid phase coexist or materials of different phases are transformed, and is applicable to the popularization and application to the chemical enterprises that have high sealing requirements and produce chemical products with the characteristics of flammability, explosiveness, high toxicity, causticity or radioactivity.

Description

The combined type sealing device for rotary shaft

Technical field

The utility model relates to a kind of seal arrangement, relates in particular to a kind of combined type sealing device for rotary shaft.

Background technique

In equipment, the leakage of working medium can cause the waste of inefficacy, material and the pollution of environment, and particularly those are inflammable, explosive, hypertoxic, be corrosive or the leakage of radioactive chemical product, will endanger personal safety and health; If the gas in the environment, dirt, water etc. invade in the equipment, then can make the wearing and tearing aggravation of equipment driving component, cause life of equipment too short.Especially in chemical enterprise, seal failure is to cause the main cause of unplanned parking, and according to statistics, 60% unplanned parking is relevant with seal failure.This shows that good sealing is for the normal operation that guarantees equipment and to reach the design of plant life-span be vital.By whether relative movement is arranged between sealing surface, sealing can be divided into motive sealing and static seal, traditional motive sealing form mainly contains mechanical seal, packing seal and labyrinth seal etc., the sealing situation of current device is an a kind of motive sealing material at a kind of phase in the single environment of form normally, in coexistence of gas, liquid, solid multi phase state material or different phase material converter, the motive sealing of this single form does not then reach seal request, and easy to wear.

The model utility content

Technical problem to be solved in the utility model is: provide a kind of in coexistence of gas, liquid, solid multi phase state material or different phase material converter, good sealing effect, nonabradable combined type sealing device for rotary shaft.

For solving the problems of the technologies described above, the technical solution of the utility model is: the combined type sealing device for rotary shaft, comprise the mechanical seal part, and described mechanical seal partly is installed on the running shaft; The packing seal part, described packing seal partly is installed on the running shaft; Described mechanical seal part is fixedlyed connected with described packing seal section axial.

As optimized technical scheme, described mechanical sealing part branch comprises moving ring assembly, and described moving ring assembly comprises rotating ring and rotating ring auxiliary seal ring, and described moving ring assembly and running shaft turn round synchronously; Static components comprises stationary ring and stationary ring auxiliary seal ring, and described static components is static, does not turn round with running shaft; Described moving ring assembly contacts with two end faces of described static components perpendicular to described running shaft, and relatively rotates; Hold down gag is used for axially described moving ring assembly being compressed, and the end face of described moving ring assembly and the end face of described static components are kept in touch.

As optimized technical scheme, described hold down gag comprises throw-out collar, and described throw-out collar is connected with described rotating ring axial restraint; Spring seat is fixedly mounted on the described running shaft, and and described throw-out collar between leave axial clearance; First holddown spring is arranged between described throw-out collar and the described spring seat.

As optimized technical scheme, described packing seal partly comprises filler, and described filler is one group of seal ring that is seated in the Stuffing box; Stuffing box is used to hold described filler; Second holddown spring is arranged between described Stuffing box inner bottom part and the described filler.

Owing to adopted technique scheme, the beneficial effects of the utility model are: because this combined type sealing device for rotary shaft comprises the mechanical seal part, mechanical seal has, sealing effect reliable advantage stable at macrocyclic sealing state in service, and friction horsepower consumes little, long service life, applied widely, can be used for low temperature, high temperature, vacuum, high pressure, different rotating speeds, and various Korrosionsmedium or contain the sealing of abrasive particle medium etc.; Because this combined type sealing device for rotary shaft also is provided with and the coaxial packing seal part of fixedlying connected of described mechanical seal part, filler has certain plasticity, thereby under the impacting force effect, can produce certain radial force and closely contact and play seal action with running shaft, filler has enough chemical stabilities, pollution medium not, can be by the medium swelling yet, and has good self-lubricating property, wear-resisting, friction factor is little, owing to be provided with spring in the Stuffing box, in running, can the filler that be worn be automatically adjusted and compensate, thereby can make filler and running shaft keep the excellent contact state always and play seal action; When combined type sealing device for rotary shaft of the present utility model is installed, the packing seal part is near equipment end, the mechanical seal part is near driving end, in the equipment operation, gas is taking place, liquid, Gu under the situation of three-phase material from leakage, the solid-state granular material that leaks out from equipment end is just partly sealed up by packing seal, also prevented simultaneously the secondary end face of kinetic friction that solid-state granular material weares and teares and formed by rotating ring and stationary ring along running shaft direction continuation leakage, and the gas that continuation is leaked, liquid material, in direction perpendicular to running shaft, can be lived by the contact jaw face seal of rotating ring and stationary ring in relative rotation, in direction, then further sealed up by rotating ring auxiliary seal ring and stationary ring auxiliary seal ring along running shaft.

Description of drawings

Below in conjunction with accompanying drawing mode of execution of the present utility model is described further:

Accompanying drawing is the utility model embodiment's a structural representation;

Among the figure: the 1-running shaft; The 2-Cock screw; 3-first holddown spring; The 4-driving pin; 5-rotating ring auxiliary seal ring; 6-stationary ring auxiliary seal ring; The 7-stop pin; The 8-gland; The 9-stationary ring; The 10-rotating ring; The 11-throw-out collar; 12-transmission screw; The 13-spring seat; The 14-connecting bolt; 15-second holddown spring; The 16-back-up ring; The 17-filler; The 18-attachment screw; The 19-end cap; The 20-Stuffing box.

Embodiment

As shown in drawings, the combined type sealing device for rotary shaft comprises the mechanical seal part, and described mechanical seal partly is installed on the running shaft 1; Packing seal part, described packing seal partly are installed on the running shaft 1; Described mechanical seal part partly is connected by connecting bolt 14 axial restraints with described packing seal.

Described mechanical sealing part branch comprises moving ring assembly, described moving ring assembly comprises rotating ring 10 and rotating ring auxiliary seal ring 5, wherein said rotating ring 10 adopts embedded structure, the stiff dough ring and the seat ring interference of being made by hard material are assembled, both improved the wear resistance of friction pair, save the high hard material of valency again, reduce cost, described moving ring assembly and running shaft 1 turn round synchronously; Static components comprises stationary ring 9 and stationary ring auxiliary seal ring 6, and described static components is static, and with running shaft 1 revolution, the outside of described static components is not provided with a gland 8, and described gland 8 is fixed together by stop pin 7 and described stationary ring 9; Described moving ring assembly contacts with two end faces of described static components perpendicular to described running shaft 1, and relatively rotates; Hold down gag is used for axially described moving ring assembly being compressed, and the end face of described moving ring assembly and the end face of described static components are kept in touch.

Described hold down gag comprises throw-out collar 11, and described throw-out collar 11 is axially being fixedlyed connected by driving pin 4 with described rotating ring 10; Spring seat 13 is fixedly mounted on the described running shaft 1 by Cock screw 2, and and described throw-out collar 11 between leave axial clearance, transmission screw 12 axially is being connected spring seat 13 with throw-out collar 11; First holddown spring 3 is arranged between described throw-out collar 11 and the described spring seat 13, and throw-out collar 11 is applied an elastic compensating power, makes described throw-out collar 11 guarantee closely to fixedly connected with described rotating ring 10.Spring seat 13 drives throw-out collar 11 and rotating ring 10 and turns round synchronously with running shaft 1 by transmission screw 12.

Described packing seal partly comprises filler 17, and described filler 17 is one group of seal ring that is seated in the Stuffing box 20; Stuffing box 20 is used to hold described filler 17; Second holddown spring 15, be arranged between the bottom and described filler 17 in the described Stuffing box 20, wherein be provided with a back-up ring 16 between second holddown spring 15 and the filler 17, so that second holddown spring 15 passes to filler 17 with elastic force by the back-up ring made from rigid material 16, like this, in running, can the filler 17 that be worn be automatically adjusted and compensate, thereby can make filler 17 and running shaft 1 keep the excellent contact state always and play seal action.

The output of described running shaft 1 is provided with an end cap 19, end cap 19 is fixed together by attachment screw 18 and Stuffing box 20, the small end end face of end cap 19 is made axial compression to filler 17, because the plasticity of filler 17 makes it closely contact with running shaft 1, to reach the purpose of sealing, the big end of end cap 19 is provided with through hole, so that equipment connects.

The sealing principle of combined type sealing device for rotary shaft of the present utility model is: when seal arrangement is installed, make the packing seal part near equipment end, the mechanical seal part is near driving end.In the equipment operation, gas is taking place, liquid, Gu under the situation of three-phase material from leakage, the solid-state granular material that leaks out from equipment end is just partly sealed up by packing seal, also prevented simultaneously the secondary end face of kinetic friction that solid-state granular material weares and teares and formed by rotating ring and stationary ring along running shaft direction continuation leakage, and the gas that continuation is leaked, liquid material, in direction perpendicular to running shaft, can be lived by the contact jaw face seal of rotating ring and stationary ring in relative rotation, in direction, then further sealed up by rotating ring auxiliary seal ring and stationary ring auxiliary seal ring along running shaft.Thereby make the gas, liquid, solid multi phase state material coexistence that combined type sealing device for rotary shaft of the present utility model has been installed or the equipment of different phase material conversion, have good sealing effect.

Though described mode of execution of the present utility model in conjunction with the accompanying drawings, those of ordinary skills can make various distortion or modification within the scope of the appended claims.

Claims

1. combined type sealing device for rotary shaft, it is characterized in that: described sealing device for rotary shaft comprises

The mechanical seal part, described mechanical seal partly is installed on the running shaft;

The packing seal part, described packing seal partly is installed on the running shaft;

Described mechanical seal part is fixedlyed connected with described packing seal section axial.

2. combined type sealing device for rotary shaft as claimed in claim 1 is characterized in that: described mechanical sealing part branch comprises

Moving ring assembly, described moving ring assembly comprise rotating ring and rotating ring auxiliary seal ring, and described moving ring assembly and running shaft turn round synchronously;

Static components, described static components comprise stationary ring and stationary ring auxiliary seal ring, and described static components is static, do not turn round with running shaft;

Described moving ring assembly contacts with two end faces of described static components perpendicular to described running shaft, and relatively rotates;

Hold down gag is used for axially described moving ring assembly being compressed, and the end face of described moving ring assembly and the end face of described static components are kept in touch.

3. combined type sealing device for rotary shaft as claimed in claim 2 is characterized in that: described hold down gag comprises

Throw-out collar, described throw-out collar is connected with described rotating ring axial restraint;

Spring seat, described spring seat is fixedly mounted on the described running shaft, and and described throw-out collar between leave axial clearance;

First holddown spring, described first holddown spring is arranged between described throw-out collar and the described spring seat.

4. as claim 1,2 or 3 each described combined type sealing device for rotary shaft, it is characterized in that: described packing seal partly comprises

Filler, described filler are one group of seal ring that is seated in the Stuffing box;

Stuffing box is used to hold described filler;

Second holddown spring, described second holddown spring is arranged between described Stuffing box inner bottom part and the described filler.