CN201496543U

CN201496543U - Hollow serial double-channel water coupling

Info

Publication number: CN201496543U
Application number: CN2009202306656U
Authority: CN
Inventors: 顾吉丰; 宋克双; 童汉泉
Original assignee: CETC 14 Research Institute
Current assignee: CETC 14 Research Institute
Priority date: 2009-08-25
Filing date: 2009-08-25
Publication date: 2010-06-02
Anticipated expiration: 2019-08-25

Abstract

The utility model relates to a hollow serial double-channel water coupling. The hollow serial double-channel water coupling is characterized in that a middle shaft of the water coupling adopts a hollow structure; metal bellows sealing assemblies are combined with the shaft through anti-rotation screws to form a fixed anti-rotation section; a first O-shaped ring is arranged between the shaft and the metal bellows sealing assemblies; a rotation section consists of a bearing cap, a first housing, a second housing and a sealing ring; the bearing cap, the first housing and the second housing are connected with each other through screws; the sealing ring is arranged between a first channel and a second channel; a bearing is arranged between the fixed anti-rotation section and the rotation section; the outer side of each metal bellows sealing assembly and one end faces of the first housing and the second housing form an end face sealing surface for preventing external leakage; the inner side of each metal bellows sealing assembly and both end faces of the sealing ring form an end face sealing surface for preventing internal leakage; and a second radial O-shaped ring is arranged on the outer side of the end face sealing surface for preventing external leakage. The metal bellows sealing assembly consists of a welded bellows, and graphite rings inlaid at both ends of the welded bellows.

Description

Hollow string data Twin channel water commissure

Technical field

The utility model relates to a kind of water commissure, relates in particular to a kind of hollow string data Twin channel water commissure.

Background technique

At present, general water commissure all is solid, major axis formula structure, and so,, rotating shaft center little, in light weight as the space in some requirement requires the special occasions of other rotary connector of suit, with regard to the rational deployment of limit structural, be difficult to also guarantee that with one heart consequently wearing and tearing are big, the life-span is low.

In the airborne radar field, because the restriction of spatial structure and weight realizes that revolving joint must be a prerequisite with in light weight, compact structure, therefore, the water commissure accomplishes that in light weight, easy installation, life-span are long, and seeming is even more important.

Sealing is the key of water commissure, and widely used both at home and abroad at present is rotary sealing, and mostly rotary sealing is that in use there are the following problems in these sealings with packing seal or cast sealing: suitable reciprocating, should not do rotation motion; Flywheel moment is big, and energy consumption is big; The distortion of dependence sealing material seals, and can't regulate the sealing contact surface gap, and under the high-voltage high-speed condition, heating value is big and be difficult for expansion, causes gluing together or tearing; Sealing wear is very fast, can't compensate for wear, the life-span is short.

By University Of Chongqing, Li Xiaohong etc. deliver " influence of seal ring parameter centering diameter aqueous medium high-pressure mechanical seal " literary composition in 2000 " lubricated and sealing ".The seal form of mentioning in this article is end face seal, and the end face seal material is tin bronze or nylon ring, and elastic element is a spring, and the O RunddichtringO is in the spring outside.The wear-resisting property of tin bronze or nylon ring is poor; Spring is as elasticity unit, and the end face impacting force is inhomogeneous, can not get even face pressure; The O RunddichtringO is in the spring outside, spring carries out end face seal after just must additionally overcoming the stiction of O RunddichtringO so, so, if the decrement of O RunddichtringO is big, can cause spring force can not overcome the stiction of O RunddichtringO fully, on end face seal face, can not set up suitable specific pressure,, can make a last static seal can not get guaranteeing if the decrement of O RunddichtringO is little.

The model utility content

1, technical problem to be solved:

Provide long, wear-resistant, lightweight a kind of hollow string data Twin channel water commissure of a kind of life-span at above not enough the utility model.

2, technological scheme:

The utility model comprises axle, bearing gland, first shell, second shell, seal ring, metal bellows black box, an O type circle, the 2nd O type circle, bearing, anti-turn screw; Axle 1 is a hollow structure, the metal bellows black box maintains static moving part by anti-turn screw and axle composition, and between axle and metal bellows black box, be provided with O type circle conduct static seal between the two, and an O RunddichtringO all is arranged in the metal bellows black box inboards of two series connection; Bearing gland, first shell, second shell, seal ring are formed the rotation rotating part; Bearing gland, first shell, second shell are connected by screw each other, and seal ring is arranged between first passage and the second channel; Maintain static between moving part and the rotation rotating part and be provided with bearing as rotational support, one end face of the outside of each metal bellows black box and first shell, second shell is formed the end face seal face that stops external leakage, and the inboard of each metal bellows black box and the both ends of the surface of seal ring are formed the end face seal face that stops internal leakage; In the end face seal arranged outside that stops external leakage radially the 2nd O type circle is arranged.The metal bellows black box is made up of welded bellows and the graphite annulus of inlaying its two.

3, beneficial effect

The graphite that adopts in the utility model is longer than the end face seal life-span of the radial seal of major axis formula and tin bronze or nylon ring to the end face seal of flour milling with the coated with hard alloy; The setting of series connection metal bellows black box has been stopped internal leakage and has been reduced external leakage again, has reduced the pollution to Environmental Conditions, can accomplish long-term non-maintaining use; Light-weight design can make the water commissure be applied to airborne radar etc., and some have the occasion of strict control, the progress that can impel correlation technique to use to weight; Quill shaft makes itself and other assembly integrated design become possibility.

Description of drawings

Fig. 1 is a structural representation of the present utility model.

Embodiment

Below in conjunction with the drawings and specific embodiments the utility model is done explanation in further detail.

As Fig. 1,1 for axle, 2 for bearing gland, 3 be first shell, 4 be second shell, 5 for seal ring, 6 for metal bellows black box, 7 be an O type circle, 8 be the 2nd O type circle, 9 for bearing, 10 for anti-turn screw, 11 for first passage, 12 for second channel.

The present invention includes axle 1, bearing gland 2, first shell 3, second shell 4, seal ring 5, metal bellows black box 6, an O type circle 7, the 2nd O type circle 8, bearing 9, anti-turn screw 10.

Metal bellows black box 6 is made up of welded bellows and the graphite annulus of inlaying its two, metal bellows black box 6 is formed the water commissure by anti-turn screw 10 with axle 1 and is maintained static moving part, and is provided with an O type circle 7 conducts static seal between the two between axle 1 and metal bellows black box 6.

Bearing gland 2, first shell 3, second shell 4, seal ring 5 are formed the rotation rotating part.Bearing gland 2, first shell 3, second shell 4 are connected by screw each other, and seal ring 5 is arranged between first passage 11 and the second channel 12.

Maintain static between moving part and the rotation rotating part by bearing 9 as rotational support, by the 2nd O type circle 8 as auxiliary motive sealing.

Seal form of the present invention is primary seal with the end face seal.A metal bellows black box has two end face seal faces, and seal face materials is a graphite, and the metal bellows black box is the serial connection metal bellows.As shown in Figure 1, one end face of the outside of each metal bellows black box 6 and first shell 3, second shell 4 is formed the end face seal face that stops external leakage, and the both ends of the surface of the inboard of each metal bellows black box 6 and seal ring 5 are formed the end face seal face that stops internal leakage.The elastic force of dependence corrugated metal pipe components and the acting in conjunction of pressure medium form certain specific pressure makes seal face realize reliable sealing, is referred to as main sealing.

In the end face seal arranged outside that stops external leakage radially the 2nd O type circle 8 auxiliary seals are arranged, be referred to as auxiliary seal, Leak hole observable leakage situation mainly is set between sealing and the auxiliary seal and reclaims and leak the sepage body.

Medium is connected by the import of pipeline with the water commissure by medium container, enter the medium working cavity of miscellaneous equipment through first passage 11, by second channel 12 medium that flows out the medium working cavity is introduced the water commissure again again,, finish cyclic process after outlet and connecting pipeline thereof flow back to medium container.

Between first passage 11 and the second channel 12, a shared intermediate seal ring 5 between the cavity of two passages, sealing surface adopts axially and arranges back-to-back, not only reduces axial dimension but also reduce pressure difference.

The material pairing of main sealing surface is the key factor of sealing, and its structure and material directly affect the performance of sealing.Seal ring on the metal bellows black box 6 adopts graphite annulus, and first shell 3, second shell 4, seal ring 5 adopt spraying Cr2O3 in 304SS surface with graphite annulus to flour milling, and surface hardness can reach HRC60, guarantees its long-term wear resistance.

After the cooling liquid with certain pressure enters first passage 11, second channel 12, the comprehensive function of hydraulic coupling and metal bellows black box 6 elastic force makes the graphite-seal ring of inlaying its two press to both sides motive sealing face, relies on two both ends of the surface to remain contact and seals.

Metal bellows black box 6 rotates with axle 1 and can endwisely slip along locating stud, after being embedded in the graphite-seal ring wearing and tearing on the metal bellows black box 6, the comprehensive function of hydraulic coupling and metal bellows black box 6 elastic force make its along axle 1 to slip, seal clearance is compensated automatically, guarantees that all the time sealing contact end face closely contacts.

There is first O-ring seals 7 to seal between metal bellows black box 6 and the axle 1.As shown in Figure 1: will be behind the resistance that overcomes the static seal circle for avoiding metal bellows black box 6, remaining elastic force just affacts sealing surface, an O RunddichtringO 7 on the axle 1 all is arranged in metal bellows black box 6 inboards of two series connection, so, when metal bellows black box 6 is done nose balance when motion to sealing surface, need not axially to promote earlier again sealing surface to be compensated behind the O RunddichtringO 7, avoided an O RunddichtringO 7 to do axial motion, can make first O-ring seals 7 that seals on the axle be in good quiet close state all the time, efficiently solve the internal leakage problem, also can improve the sealing effect of two-way end face seal, not only stop internal leakage but also reduced the generation of external leakage.Axial motive sealing herein is converted into static seal, has both reduced the installation difficulty of an O RunddichtringO 7, avoided interior leakage effectively, having guaranteed fully again has sufficient pressure to seal on the seal face, strengthened sealing effect.

External leakage and internal leakage hole are set, monitor the inside and outside leakage that has or not in the water commissure running at any time.

Its first shell 3, second shell 4, axle 1, bearing gland 2 are for adopting aluminum alloy, and anodic oxidation is carried out in order to avoid by dielectric corrosion in its surface;

Axle 1 is a hollow structure, and the hollow shaft diameter can be looked specific requirement and definite axle 1 median pore diameter according to the size of components of need integrated design suit.

The utility model has guaranteed sealing surface well under 10 rev/mins rotating speed, and accumulative total is moved not have in 5000 hours and leaked outside and the generation of interior leakage phenomenon.

Though the utility model with preferred embodiment openly as above; but they are not to be used for limiting the utility model; anyly be familiar with this skill person; in the spirit and scope that do not break away from the utility model; can do various variations or retouching from working as, what therefore protection domain of the present utility model should be defined with the application's claim protection domain is as the criterion.

Claims

1. a hollow string data Twin channel water commissure is characterized in that: comprise axle (1), bearing gland (2), first shell (3), second shell (4), seal ring (5), metal bellows black box (6), an O type circle (7), the 2nd O type circle (8), bearing (9), anti-turn screw (10); Axle (1) is a hollow structure, metal bellows black box (6) maintains static moving part by anti-turn screw (10) and axle (1) composition, and between axle (1) and metal bellows black box (6), be provided with an O type circle (7) conduct static seal between the two, and an O RunddichtringO (7) all is arranged in metal bellows black box (6) inboards of two series connection; Bearing gland (2), first shell (3), second shell (4), seal ring (5) are formed the rotation rotating part; Bearing gland (2), first shell (3), second shell (4) are connected by screw each other, and seal ring (5) is arranged between first passage (11) and the second channel (12); Maintain static between moving part and the rotation rotating part and be provided with bearing (9) as rotational support, one end face of the outside of each metal bellows sealing group (6) part and first shell (3), second shell (4) is formed the end face seal face that stops external leakage, and the both ends of the surface of the inboard of each metal bellows black box (6) and seal ring (5) are formed the end face seal face that stops internal leakage; In the end face seal arranged outside that stops external leakage radially the 2nd O type circle (8) is arranged.

2. hollow string data Twin channel water commissure according to claim 1 is characterized in that: metal bellows black box (6) is made up of welded bellows and the graphite annulus of inlaying its two.