CN206130085U - F type composite seal spare - Google Patents

Abstract

Present high pressure oil seal can directly become violent impact to O type cast when high -pressure fluid process, can enclose the O type even and directly wash out, because of lacking sealing up of O type circle, directly results in fluid to leak when sealed position is got back to to the dabber. A F type composite seal spare, including the quick -operation joint casing, the seal, the dabber, the dabber cavity, the net hits the wall, rectangular sealing ditch inslot is equipped with O type circle and the F type supports the seal, O type circle sets up inside the rectangular sealing slot, O type circle outside parcel has the F type to support the seal, the opening that the F type supported the seal inclines towards the rectangular sealing inslot, the F type supports the seal and partly surrounds the structure to O type circle constitution, the F type supports the seal including erecting the flange, first crosspiece limit and second crosspiece limit, first crosspiece limit and second crosspiece limit are located the rectangular sealing inslot: sealed spherical valve and the cooperation of the netted wall of arc are used, and seamless cooperation when static can provide bigger frictional force when standing to assault, and factor of safety is higher to effectively avoided the sealing member to take place because of the condition that the impact leads to droing.

Description

A kind of F types combination seal

Technical field

The utility model is related to mechanical field, specifically a kind of F types combination seal.

Background technology

At present, sealing ring is the conventional sealing means of hydro-pneumatic field, and existing single seal form is more and more not yet The requirement of modern machines equipment is adapted to, needs to research and develop a kind of new sealing means to adapt to modern machines equipment to sealing Require, to improve its sealing and reliability.

During working condition, seal is subject to ready-packaged joint " female end " axial thrust and slides inwards, exposes mandrel and core 4 oil leak holes for interpenetrating on axle, high-voltage oil liquid is in mandrel cavity by 4 oil leak holes for interpenetrating on mandrel, height Speed injection ready-packaged joint housing, now high-voltage oil liquid can directly to O-ring formation severe impact, and O-ring lacks protection, or even meeting O-ring is directly washed out, when mandrel returns to sealing station because lacking the sealing of O-ring, oil liquid leakage is directly resulted in, so as to lead Cause O-ring seal failure in inactive state.

The content of the invention

For the problems referred to above, the utility model provides a kind of " L " type combination seal for hydraulic pressure ready-packaged joint, can The impact of high-pressure oil flow is born well, so as to effectively prevent seal because impact causes situation about coming off to occur, well Realize static state and dynamic sealing performance.For achieving the above object, the utility model is designed with following manner is carried out：

A kind of F types combination seal, including snap joint housing, seal, mandrel, mandrel cavity, net hit wall, its feature It is that snap joint housing afterbody is provided with step, the screw thread of connection oil pipeline is provided with outside step；Snap joint inner walls Seal is provided with, seal inner side, snap joint casing center are fixedly connected with the junction of mandrel, seal and mandrel and are provided with Back-moving spring, back-moving spring center is provided with the lead column for preventing displacement, and the sliding cavity that back-moving spring is placed on the inside of seal resets Spring bottom end is fixed on sliding cavity bottom, and back-moving spring top passes through cross bar connecting mandrel top；

Mandrel inside is cavity structure, and 4 netted walls for interpenetrating, netted wall are radially provided with the side wall of mandrel cavity Medial surface be arc, be provided between the netted wall of relative arc ellipse sealing globe valve, seal globe valve both sides arc top It coincide with the inner arc of netted wall；

Mandrel front end outer side shoulder is provided with rectangular seal groove, O-ring is provided with rectangular seal groove and F types support sealing Body, O-ring is arranged at rectangular seal trench interiors, and O-ring outside is enclosed with F types and supports seal, F types to support opening for seal Towards rectangular seal groove inner side, F types support seal that semi-surrounding structure is constituted to O-ring to mouth, and F types support seal including perpendicular gear In, the first strut rail and the second strut rail side, the first strut rail while and be located in rectangular seal groove during the second strut rail, the first strut rail side and O-ring is placed between the second strut rail side, the first strut rail edge tail is provided with downward bend, and the second strut rail edge tail is provided with upwards Bend, F types support the perpendicular rib of seal connect the first strut rail while and outer end during the second strut rail and continue to extend, F types The perpendicular rib of support seal is located at groove opening, and perpendicular rib upper end is thin, lower end is thick, and is in nature transition by upper end to lower end Structure.

Preferably, the O-ring and netted wall are shifted to install.

Preferably, the O-ring is hollow sealing ring.

Preferably, the O-ring is the O-ring of NBR materials.

Preferably, the width of the sealing globe valve is more than mandrel cavity inside diameter, less than the external diameter of mandrel cavity.

Preferably, height of the height of the sealing globe valve more than the netted wall of arc.

Preferably, the F types support the perpendicular rib of seal wedge shaped.

Preferably, the F types support seal for the support seal of PTFE3 materials.

Preferably, the F types support the first strut rail of seal while and stage casing during the second strut rail be provided with and coincide with O-ring Groove.

During inactive state, high-voltage oil liquid be sealed in it is immobilising in mandrel cavity.

The beneficial effects of the utility model are：Compared with prior art, oil leak hole is changed to netted wall, sealing effect by this technology More preferably, F types support seal to adopt triple seal to fruit：First, seal globe valve and the netted wall of arc is used cooperatively, it is seamless when static Coordinate, oil stream pushes spherical sealed valve to cavity bottom when using, oil stream is flowed out by netted wall；2nd, when static, O-ring and F types Support the first strut rail of seal while and coordinating during the second strut rail prevents fluid from revealing, when using, F types support seal to pass through the One strut rail while and wrap up O-ring during the second strut rail and prevent from being flushed away；3rd, F types support the perpendicular rib of seal, under static state Will not shrink completely, the thin part in upper end is fully squeezed between mandrel and seal prevents oil leak；Under in working order, hydraulic oil Stream can the part thicker to bottom apply downwards, to the axial thrust of core, promote perpendicular rib O-ring to be clamp-oned in groove, in Jing Bigger frictional force can be provided when being hit, safety coefficient is higher, so as to effectively prevent seal because impact causes what is come off Situation occurs.

Description of the drawings

Fig. 1 is cross-sectional view of the present utility model；

Mark in figure：1- snap joint housings；2- seals；3- mandrels；The netted walls of 4-；5-O type circles；6-F types support close Feng Ti；7- seals globe valve.

Specific embodiment

Embodiment 1：

As shown in drawings, it is the standstill seal state of this invention, O type circles（NBR materials）It is wrapped in bracing ring （PTFE3 materials）In form a seal combination body, O-ring and F types support the first strut rail of seal while and during the second strut rail Cooperation prevents fluid from revealing, and component plays good sealing property；

When using, seal is subject to ready-packaged joint " female end " axial thrust and slides inwards, and 4 mutually on mandrel and mandrel The netted wall for connecting exposes, high-voltage oil liquid in mandrel cavity by netted wall, injection ready-packaged joint housing at a high speed, use When, F types support seal by the first strut rail while and wrap up O-ring during the second strut rail and prevent from being flushed away；3rd, F types support sealing The perpendicular rib of body, will not shrink completely under static state, and the thin part in upper end is fully squeezed between mandrel and seal and prevents Oil leak；Under in working order, part that high-pressure oil flow can be thicker to bottom apply downwards, to the axial thrust of core, promote to erect Rib clamp-ons O-ring in groove, and bigger frictional force can be provided when experiencing a shock, and safety coefficient is higher, so as to be prevented effectively from Seal causes situation about coming off to occur because of impact.

After terminating, i.e., high-pressure oil flow halted state when, seal loses the oil flow pressure at ready-packaged joint " female end ", Resetted by suction function and back-moving spring, the spherical seal for being compressed resets, block netted wall and keep sealing；While by Diminish in pressure, O-ring volume becomes pushes the part that F types support the perpendicular rib top of seal relatively thin to seal greatly, plays close Envelope is acted on.

Claims (9)

1. a kind of F types combination seal, including snap joint housing, seal, mandrel, mandrel cavity, net hit wall, and its feature exists In snap joint housing afterbody is provided with step, and the screw thread of connection oil pipeline is provided with outside step；Snap joint inner walls set There is seal, seal inner side, snap joint casing center are fixedly connected with the junction of mandrel, seal and mandrel and are provided with multiple Position spring, back-moving spring center is provided with the lead column for preventing displacement, the sliding cavity that back-moving spring is placed on the inside of seal, reset bullet Sliding cavity bottom is fixed in spring bottom, and back-moving spring top passes through cross bar connecting mandrel top；It is cavity structure inside mandrel, core 4 netted walls for interpenetrating are radially provided with the side wall of axle cavity, the medial surface of netted wall is arc, and relative arc is netted The sealing globe valve of ellipse is provided between wall, the inner arc on the both sides arc top and netted wall that seal globe valve coincide；Outside mandrel front end Side shoulder is provided with rectangular seal groove, O-ring is provided with rectangular seal groove and F types support seal, O-ring to be arranged at rectangle Inside sealed groove, O-ring outside is enclosed with F types and supports seal, F types to support the opening of seal towards in rectangular seal groove Side, F types support seal to constitute semi-surrounding structure to O-ring, and F types support seal to include perpendicular rib, the first strut rail side and the Two strut rail sides, the first strut rail while and be located in rectangular seal groove during the second strut rail, the first strut rail while and during the second strut rail between place O Type circle, the first strut rail edge tail is provided with downward bend, and the second strut rail edge tail is provided with bend upwards, and F types support close The perpendicular rib of envelope body connect the first strut rail while and outer end during the second strut rail and continue to extend, F types support the perpendicular rib of seal At groove opening, perpendicular rib upper end is thin, lower end is thick, and is in nature transition structure by upper end to lower end.

2. a kind of F types combination seal according to claim 1, it is characterised in that the O-ring and the dislocation of netted wall set Put.

3. a kind of F types combination seal according to claim 1, it is characterised in that the O-ring is hollow sealing Circle.

4. a kind of F types combination seal according to claim 1, it is characterised in that the O-ring is O-shaped for NBR materials Circle.

5. a kind of F types combination seal according to claim 1, it is characterised in that the width of the sealing globe valve is big In mandrel cavity inside diameter, less than the external diameter of mandrel cavity.

6. a kind of F types combination seal according to claim 1, it is characterised in that the height of the sealing globe valve is big In the height of the netted wall of arc.

7. a kind of F types combination seal according to claim 1, it is characterised in that the F types support the perpendicular gear of seal Side is wedge shaped.

8. a kind of F types combination seal according to claim 1, it is characterised in that the F types support the seal to be The support seal of PTFE3 materials.

9. a kind of F types combination seal according to claim 1, it is characterised in that the F types support the first of seal Strut rail while and stage casing during the second strut rail be provided with the groove that coincide with O-ring.