CN2793458Y

CN2793458Y - Rotary sealer

Info

Publication number: CN2793458Y
Application number: CN 200520018112
Authority: CN
Inventors: 张厚珕
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-05-08
Filing date: 2005-05-08
Publication date: 2006-07-05
Anticipated expiration: 2015-05-08

Abstract

The utility model relates to a rotary sealer which is used for dividing the surrounding environment between a first axis and a second axis; the two axes are in coaxial line and are used for bearing rotational movement, and the rotational movement is transferred between the two axes. The utility model mainly comprises a baffle with a hole, a flexible seal membrane plate covering on the baffle hole, a link rod passing through the centre hole of the seal membrane plate, a positioning joint and crank arms fixed on the ends of the two axes. When the first axis rotates, the crank arms shift both ends of the link rod to move circularly at the same time, and the second axis is driven to rotate. The positioning joint prevents the link rod from rotating by using length direction as axis, so the membrane can not be twisted and damaged. The flexible seal membrane plate deforms along with the motion of the link rod; no rotary seal resistance is increased by the elastic deformation of the seal membrane plate, and the rotary seal is guaranteed. The utility model has the advantages of no leakage, low resistance torque, no magnetism and external disturbance resistance. The utility model is suitable for use in miniature instruments and meters, and is especially suitable for use in water gauge counters which need to keep the filled liquid clean and leakless for a long term.

Description

Rotating sealing device

Technical field

The utility model relates generally to the sealing of axle, and more precisely, it relates to the inclusion seal device of transferring rotational motion between two varying environments.

Background technique

At instrument field, often need a part of element is sealed in the housing of an isolation, and between two different environment inside and outside the housing transferring rotational motion.In order to prevent gas or leak of liquid, it is leak free requiring rotary seal; In order to reduce the resistive torque that sealing increases, wish that sealing is to hang down resistive torque; The interference that brings in order to deperm wishes to avoid using the magnetic couplings coupling.

Chinese patent 98218891.9 has proposed a kind of hermetically sealed isolation mounting, and this patent adopts move about isolating cylinder and elastomeric isolation bowl to realize isolating, but does not relate to the problem that move about isolating cylinder and elastomeric isolation bowl can twist.Chinese patent 98123940.4 has proposed a kind of mechanical counter that counting gear is encapsulated in the housing that is full of transparency liquid, its input shaft bore uses the O-ring seals sealing, and this patent reduces the resistive torque aspect existing problems that sealing causes when reducing the topping up leakage.

Summary of the invention

The purpose of this utility model is to provide a kind of low resistive torque that has, and leak free rotating sealing device is adapted at using in the miniature instrument instrument, is particularly suitable for using in water meter counter.

The technical solution of the utility model is: a kind of rotating sealing device, be used to cut apart the surrounding environment between first and second that bears the common main axis that rotatablely moves, and transferring rotational motion between these two axles is characterized in that it comprises: the dividing plate of dividing two environment; This dividing plate hole is passed in hole on this dividing plate, main axis; Pass the dividing plate hole and between two axles, transmit the connecting rod of mechanical motion; Connecting rod is connected in the positioning joint in dividing plate hole; Cover the flexible membrane with intermediate hole in dividing plate hole, the flexible membrane outer rim forms airtight fixedlying connected with dividing plate, and the inner edge of diaphragm intermediate hole forms airtight fixedlying connected with connecting rod; The axle head of the axle head of first contiguous dividing plate and second contiguous dividing plate is fixed with radially outstanding moving arm; The termination of connecting rod and moving arm flexibly connect, and moving arm is stirred the connecting rod termination and made circular movement around main axis when first or second rotation.

Advantage of the present utility model is to provide and realizes sealing leak free rotary seal scheme fully, does not need magnetic element, does not use elastic element, and the resistive torque that increases because of sealing is very little, is adapted at using in the instrument and apparatus, is particularly suitable for using in water meter.

Description of drawings

Fig. 1 is that moving arm is an embodiment of the rotating sealing device of connecting lever,

Fig. 2 is an embodiment's of positioning joint a schematic representation,

Fig. 3 is that moving arm is another embodiment of the rotating sealing device of gear.

Embodiment

Below in conjunction with description of drawings the utility model is described in further detail:

Fig. 1 is the schematic representation of a preferred embodiment, and Fig. 2 is the schematic representation of positioning joint; Dividing plate 1 is produced on the rotating sealing device shell; Flexible membrane 12 covers in the dividing plate perforate 2, has divided two environment; Flexible membrane 12 outer rims form airtight the connection with dividing plate, and the inner edge of diaphragm intermediate hole forms airtight the connection with connecting rod 6; Opening in

shell

18 and 19 respectively with two environmental communication of dividing plate both sides; Axle 5 and axle 9 are coaxial, form the main axis of seal connection, and the moving arm of axle 5 is a connecting lever 3; The moving arm of axle 9 is a connecting lever 11; Spindle nose 7 and spindle nose 13 are coaxial; Knuckle support 8, forms rotating shaft with dividing plate and is connected as the joint first axle with the axis of spindle nose 7 and spindle nose 13; Knuckle support 8 is joint second axis with the axis of axle 14, forms rotating shaft with connecting rod 6 and is connected; Joint first axle and joint second axis are orthogonal to intersect, and is vertically intersected on articulation center with main axis; The end portion of connecting rod 6 stretches into sidewise hole 4 and sidewise hole 10; These two sidewise hole coaxial lines, this axis passes articulation center; Connecting rod 6 can serve as that axle is made horizontal hunting and served as that axle is made vertical oscillation with joint second axis with the joint first axle; The connecting rod termination is around the circular movement of the main axis compound motion of the vertical and horizontal hunting of connecting rod just; Axle 5 and axle 9 transmit rotation by connecting rod 6; When connecting rod moved, the flexible membrane sector-meeting with ripple produced adaptive distortion, had kept the seal isolation between two environment in dividing plate both sides; Connecting rod 6 is under the restriction of positioning joint, and can not do with self length is the rotation of axis, so flexible membrane 12 can not suffer damage because of bearing torsion, does not also need elasticity, and rotating sealing device does not increase the resistance of rotation because of the resiliently deformable of diaphragm.

Fig. 3 is another embodiment, and dividing plate 1 is produced on the seal arrangement shell, this shell part of only having drawn, and present embodiment is identical with the working principle of previous preferred embodiment; Be that with the difference of Fig. 1 the moving arm that axle 5 is installed is a gear 21; The moving arm that axle 9 is installed is a gear 22; Gear 21 and gear 22 are used for being meshed with other gear.

Under some applicable cases, harsh requirement is arranged for the leakage of rotary seal and the resistive torque that causes.For example in water meter, the resistive torque increase of water meter counter directly causes the precision reduction of water meter and the deterioration of small flow sensitivity.For the requirement of lubricated and sensitivity, the counter in the water meter mostly is the wet type counter, directly is immersed in counter in the tap water; But cause that also counter is subjected to the pollution of scale and mould simultaneously, cause numeral not see, counting gear also can be damaged by impurity.So preferably increase a rotating sealing device, counter and tap water are kept apart, and in the counter chamber that is separated out, fill with colourless transparent liquid.Once the someone adopted the magnetic couplings coupling, isolated in the housing though water meter counter is closed in, and the magnetic couplings coupling is subject to extraneous jamming, and the iron rust in the water also can be adsorbed on the magnetic shaft coupling, the reliability of influence counting.Also having a kind of method is exactly the method for already mentioned use O-ring seals sealing in background technique, and the problem of its existence is illustrated in front.

Compared with prior art, the utility model has solved the problem that prior art exists, and its main advantages is: having accomplished that rotating sealing device is leak free, is to hang down resistive torque, is non-magnetic.

Claims

1. rotating sealing device is used to cut apart the surrounding environment between first and second that bears the common main axis that rotatablely moves, and between these two axles transferring rotational motion, it is characterized in that it comprises: the dividing plate of dividing two environment; This dividing plate hole is passed in hole on this dividing plate, main axis; Pass the dividing plate hole and between two axles, transmit the connecting rod of mechanical motion; Connecting rod is connected in the positioning joint in dividing plate hole; Cover the flexible membrane with intermediate hole in dividing plate hole, the flexible membrane outer rim forms airtight fixedlying connected with dividing plate, and the inner edge of diaphragm intermediate hole forms airtight fixedlying connected with connecting rod; The axle head of the axle head of first contiguous dividing plate and second contiguous dividing plate is fixed with radially outstanding moving arm; The termination of connecting rod and moving arm flexibly connect, and moving arm is stirred the connecting rod termination and made circular movement around main axis when first or second rotation.

2. the said rotating sealing device of claim 1, it is characterized in that: said positioning joint comprises a knuckle support; This knuckle support and dividing plate form axis hole and are rotationally connected, and the rotation axis of this connection is called the joint first axle; This knuckle support forms another axis hole with the connecting rod that passes the dividing plate hole and is rotationally connected, and the rotation axis of this connection is called joint second axis; Joint first axle, joint second axis, the orthogonal articulation center point that intersects at of main axis.

3. the said rotating sealing device of claim 2, it is characterized in that: said moving arm is the connecting lever that is manufactured with a sidewise hole; Relative and the coaxial line of the sidewise hole direction of two connecting levers, this axis passes said articulation center point; The end portion of said connecting rod is a cylinder type; The moveable connection method of connecting rod and connecting lever is that the end portion of connecting rod stretches into said sidewise hole inside.

4. the said rotating sealing device of claim 2, it is characterized in that: said moving arm is a gear coaxial with main axis; On the opinion breadth of gear, be manufactured with a sidewise hole; Relative and the coaxial line of the sidewise hole direction of two gears, this axis passes said articulation center point; The end portion of said connecting rod is a cylinder type; The moveable connection method of connecting rod and connecting lever is that the end portion of connecting rod stretches into said sidewise hole inside.