CN207297876U - Non-contact mechanical seal device - Google Patents

Abstract

The utility model provides a kind of non-contact mechanical seal device, including housing, shaft, bearing, and the shaft is installed on housing by bearing, and the outer end of the shaft is fixed with rotating ring, and in ring cavity of the rotating ring between shaft and housing；The rotating ring is U-type groove structure of the opening towards the enclosure interior, and the rotating ring outer peripheral edge is not contacted with the housing.The utility model prevents fluid from leaking using the kinetic energy of liquid.Liquid obtains energy in rotating rotating ring, leaves rotating ring at a high speed, is previously formed one inside and outside of liquid curtain wall of isolation in gap leakage, prevents liquid leakage.Due to not contacted with stationary object, because without wearing, nothing needs to change；Required fluid flow is small, therefore consumed energy is few.

Description

Non-contact mechanical seal device

【Technical field】

Mechanical seal field is the utility model is related to, is specially a kind of non-contact mechanical seal device.

【Background technology】

Currently used mechanical seal is made of rotating ring, stationary ring, 0 type circle of spring and auxiliary sealing member etc., and rotating ring is fixed In shaft, rotated with axis, stationary ring is fixed on housing, is pressed in by built-in spring in the plane of rotating ring.It is no matter mechanical 2 planes of start-stop, rotating ring and stationary ring stick together all the time, separate interior or exterior space, play the role of preventing liquid leakage.It is this Sealing device effect is good, but sealing surface is easy to wear, it is necessary to replacing after a period of time that works.

Flexible axle envelope is made by flexible material (rubber etc.) and skeleton, is pressed in spring handle sealing lip on axis, inside pressure Power also functions to effect sealing lip being pressed on axis, so as to play the role of preventing liquid leakage.This sealing device sealing pressure Power is relatively low, it is necessary to replacing after a period of time that works.

Packing box seal is that filler is filled in stuffing-box chamber, and filler is close on axis after compression, separates interior or exterior space, resistance Only liquid leakage.This sealing device is only used for low speed occasion, and is easily damaged.

Above-mentioned sealing device is all contact seal, and validity period is short, it is necessary to often replace.Therefore, it is necessary to improve.

【Utility model content】

The purpose of this utility model is to provide a kind of good seal performance, stablizes durable non-contact mechanical seal dress Put.

The technical solution of the utility model is as follows：

A kind of non-contact mechanical seal device, including housing, shaft, bearing, the shaft are installed on shell by bearing On body, the outer end of the shaft is fixed with rotating ring, and in ring cavity of the rotating ring between shaft and housing；The rotating ring is to open Towards the U-type groove structure of the enclosure interior, the rotating ring outer peripheral edge does not contact mouth with the housing.

Preferably, stationary ring is arranged with the ring cavity, the outer peripheral edge of the stationary ring is fixedly connected with the housing, described Stationary ring is U-type groove structure of the opening towards the hull outside, and the stationary ring inner peripheral is not contacted with the shaft；The stationary ring Annular seal space is enclosed with the rotating ring, and the rotating ring is not contacted with the stationary ring.

Preferably, distributing auger groove on the inner wall of the rotating ring U-type groove.

Preferably, distributing auger is raised on the inner wall of the rotating ring U-type groove.

Preferably, U-shaped lid is fixed with the spiral salient.

Non-contact mechanical seal device provided by the utility model in shaft outer end by installing rotating ring, the liquid of leakage Into in the U-type groove of rotating ring and phantom ring rotates at a high speed and obtains energy flow at high speed, and the liquid of U-type groove high speed flowing departs from During rotating ring, after its axial flow direction and liquid leakage direction are on the contrary, encounter the liquid of leakage, swiftly flowing liquid slows down pressure Power rises, so as to prevent the leakage of liquid；Since rotating ring is not contacted with stationary object, because abrasion may be not present, without rapid wear Part；Liquid velocity for sealing is higher, but its amount is small, thus the energy consumed is few；It is and this after stationary ring is installed additional The energy that device needs is only to overcome this partially liq in the flow resistance of ring packing intracavitary.

【Brief description of the drawings】

Fig. 1 is the cross-sectional view of the utility model embodiment one, three, five, seven；

Fig. 2 is the utility model embodiment one, the profile of two rotating rings；

Fig. 3 is the cross-sectional view of the utility model embodiment two, four, six, eight；

Fig. 4 is the profile of two, four, six, eight stationary ring of the utility model embodiment；

Fig. 5 is the rotating ring profile of the utility model embodiment three and example IV；

Fig. 6 is the rotating ring profile of the utility model embodiment five and embodiment six；

Fig. 7 is the rotating ring profile of the utility model embodiment seven and embodiment eight.

【Embodiment】

The utility model is described in further detail with embodiment below in conjunction with the accompanying drawings.

Embodiment one：

Please refer to Fig.1 and Fig. 2, the utility model disclose a kind of non-contact mechanical seal device, including housing 1, shaft 2nd, bearing 3, the shaft 2 are installed on housing 1 by bearing 3, and the outer end of the shaft 2 is fixed with rotating ring 4, and rotating ring 4 In ring cavity 6 between shaft 2 and housing 1；The rotating ring 4 is opening towards the U-type groove structure inside the housing 1, institute State 4 outer peripheral edge of rotating ring not contact with the housing 1, and a gap 61 is formed with the housing.

During work, the liquid of starting leakage comes to enter the rotating ring U-type groove zone of action vertically, frictional force effect under with Rotating ring rotates, and departs from rotating ring and throws away its rear axial flow direction with leakage direction on the contrary, after encountering the liquid for continuing leakage, departs from The liquid retarding pressure that rotating ring is thrown away rises, and curtain wall is formed before gap leakage 61, barrier liquid leaks out.

Since the rotating ring 4 is not contacted with the housing 1, because abrasion may be not present, without vulnerable part；Although for sealing Liquid velocity it is higher, but its amount is small, thus the energy consumed is few.

Embodiment two：

Fig. 2, Fig. 3, Fig. 4 are referred to, the non-contact mechanical seal device includes housing 1, shaft 2, bearing 3, rotating ring 4 With stationary ring 5, stationary ring 5 is symmetrically set in ring cavity 6, and the outer peripheral edge of the stationary ring 5 is fixedly connected with the housing 1, and the stationary ring 5 is Opening is not contacted towards the U-type groove structure outside the housing 1, the quiet 5 ring inner peripheral with the shaft 2；The stationary ring 5 with The rotating ring 4 is enclosed annular seal space 7, and the rotating ring 4 is not contacted with the stationary ring 5.

During work, starting leakage enters axially into 7 zone of action of annular seal space, the phantom ring 4 under frictional force effect Rotation, departs from after rotating ring is thrown away and curtain wall is formed before gap leakage 61, barrier liquid leaks out；Turned round on 5 surface of stationary ring To reenter 4 zone of action of rotating ring, circulated into next time；After stationary ring 5 has been installed additional, due to the liquid for sealing substantially not Contacted with the liquid beyond annular seal space 7, the kinetic energy and pressure energy of this partially liq are able to part preservation, and this device needs Energy be only overcome flow resistance of this partially liq in annular seal space 7, required energy is few.

Embodiment three：

Please refer to Fig.1 and Fig. 5, the inner wall of the U-type groove of the rotating ring 4 have some helicla flutes 41, the helicla flute 41 is equal Even distribution, and the helicla flute 41 rotates with the rotating ring 4 and drives liquid to be got rid of along the U-type groove close to the side of the housing Go out, form curtain wall after throwing away before gap leakage 61, barrier liquid leaks out.

Example IV：

Fig. 3, Fig. 4, Fig. 5 are referred to, the stationary ring 5 is enclosed annular seal space 7 with the rotating ring 4, the rotating ring 4 The inner wall of U-type groove has some helicla flutes 41, and the helicla flute 41 is uniformly distributed, and the helicla flute 41 is rotated with the rotating ring Liquid is driven to be thrown away along the U-type groove close to the side of the housing；Curtain wall, barrier liquid are formed after throwing away before gap leakage Leak out；On stationary ring surface, revolution comes to reenter rotating ring region, is circulated into next time.After stationary ring 5 has been installed additional, due to Liquid for sealing is not contacted with the liquid beyond annular seal space 7 substantially, the kinetic energy and pressure energy of this partially liq are able to Part preserves, and the energy that this device needs is only to overcome flow resistance of this partially liq in annular seal space 7, institute Need energy few.

Embodiment five：

Please refer to Fig.1 and Fig. 6, the inner wall of the U-type groove of the rotating ring 4 is formed with some spiral salients 42, some spiral shells Rotation protrusion 42 is uniformly distributed, and the spiral salient 42 rotates with the rotating ring and drives liquid along the U-type groove close to the shell Body side is thrown away, and forms curtain wall after throwing away before gap leakage 61, and barrier liquid leaks out.

Embodiment six：

Fig. 3, Fig. 4, Fig. 6 are referred to, the stationary ring 5 is enclosed annular seal space 7 with the rotating ring 4, the rotating ring 4 The inner wall of U-type groove is uniformly distributed formed with some spiral salients 42, some spiral salients 42, and the spiral salient 42 with The rotating ring rotation drives liquid to be thrown away along the U-type groove close to the housing side, forms curtain after throwing away before gap leakage Wall, barrier liquid leak out；On stationary ring surface, revolution comes to reenter rotating ring region, is circulated into next time；Installing additional After stationary ring 5, since the liquid for sealing is not contacted with the liquid beyond annular seal space 7 substantially, the kinetic energy of this partially liq Part is able to pressure energy to preserve, the energy that this device needs is only to overcome stream of this partially liq in annular seal space 7 Dynamic resistance, required energy are few.

Embodiment seven：

Please refer to Fig.1 and Fig. 7, the inner wall of the U-type groove of the rotating ring 4 is formed with some spiral salients 42, some spiral shells Rotation protrusion 42 is uniformly distributed, and the rotating ring 4 includes U-shaped lid 43, and the U-shaped lid 43 is fixedly arranged on the spiral salient 42 simultaneously In U-type groove, and some spiral channels are formed between the U-type groove, spiral salient 42,43 three of U-shaped lid, spiral channel with The rotating ring rotation drives liquid to be thrown away along the U-type groove close to 1 side of housing；Formed after throwing away before gap leakage 61 Curtain wall, barrier liquid leak out.

Embodiment eight：

Fig. 3, Fig. 4, Fig. 7 are referred to, the stationary ring 5 is enclosed annular seal space 7 with the rotating ring 4, the rotating ring 4 The inner wall of U-type groove is uniformly distributed formed with some spiral salients 42, some spiral salients 42, and the rotating ring 4 includes U-shaped lid 43, the U-shaped lid 43 is fixedly arranged on the spiral salient 42 and in the U-type groove, and the U-type groove, spiral salient 42, Some spiral channels are formed between U-shaped 43 three of lid, spiral channel is rotated with the rotating ring drives liquid close along the U-type groove 1 side of housing is thrown away；Curtain wall is formed after throwing away before gap leakage 61, barrier liquid leaks out.Installing stationary ring 5 additional Afterwards, since the liquid for sealing is not contacted with the liquid beyond annular seal space 7 substantially, the kinetic energy and pressure of this partially liq Part preservation can be able to, the energy that this device needs is only to overcome flow resistance of this partially liq in annular seal space 7 , required energy is few.

The utility model prevents fluid from leaking using the kinetic energy of liquid.Liquid obtains energy in rotating rotating ring, at a high speed Rotating ring is left, one inside and outside of liquid curtain wall of isolation is previously formed in gap leakage, prevents liquid leakage.Due to not with resting Body contacts, because without wearing, nothing needs to change；Required fluid flow is small, therefore consumed energy is few.

Above-described is only the embodiment of the utility model, it should be noted here that the ordinary skill for this area For personnel, on the premise of not departing from the utility model and creating design, improvement can also be made, but these belong to this practicality New protection domain.

Claims (4)

1. a kind of non-contact mechanical seal device, including housing, shaft, bearing, the shaft is installed on housing by bearing On, it is characterised in that:The outer end of the shaft is fixed with rotating ring, and in ring cavity of the rotating ring between shaft and housing；Institute It is U-type groove structure of the opening towards the enclosure interior to state rotating ring, and the rotating ring outer peripheral edge is not contacted with the housing, and with institute State housing and form a gap.

2. non-contact mechanical seal device according to claim 1, it is characterised in that：The inner wall of the rotating ring U-type groove Upper distributing auger groove.

3. non-contact mechanical seal device according to claim 1 or 2, it is characterised in that：The rotating ring U-type groove it is interior Distributing auger is raised on wall.

4. non-contact mechanical seal device according to claim 3, it is characterised in that：It is fixed with the spiral salient U-shaped lid.