SU1295117A2 - Revolving shaft seal - Google Patents

Abstract

This invention relates to a sealing technique. The aim of the invention is to increase the sealing capacity and the sealing resource by keeping the visco-elastic medium in the working gap. When the shaft 2 and the disk 3 rotate, the fluid in the gap 5 is rotated in rotation, making a circular motion in a stressed state. There is an increase in pressure inside the fluid from PQ at the periphery to P in the central zone. The pressure created by the viscoelastic fluid is the counterpressure with respect to the pressure P of the cavity 7. At the same time, retaining means, such as screw cutting, directed in the opposite direction: the shaft prevents the fluid from moving along the shaft and holds it in the working The gap 5. When the retaining means is made in the form of an additional disk, the cavity 7 is also filled with a viscoelastic fluid. During the operation of the seal, this fluid tends to move along the shaft towards the working gap, spo. own preservation in the elastic medium in the working gap 5. With you (О tN5 CO ate 14)

Description

1295117

According to the retention means in the bore gap 5, because the sleeve is not a sleeve mounted on the shaft, it touches the shaft and is not rotatable relative to the relative state, which is not transversely viscous, is viscous fluid during coelastic fluid rotation from the shaft, the work of the seal is kept in - 5P.p. f-ly, 3 ill.

one

The invention relates to a sealing technique and is a refinement of the seal according to the authors. St. No. 731156.

The purpose of the invention is to increase the sealing ability and seal resource by keeping the external environment in the working gap.

FIG. 1 shows the proposed seal with retaining means in the form of a screw thread; FIG. 2 - the same, with the holding means in the form of an additional disk; fig.Z - the same, with the holding means in the form of a sleeve.

The seal consists of a cylindrical body 1 and a shaft 2, between which the shaft disk 3 and the body disk 4 are fixed. The gaps 5 of the mezzanine discs 3 and 4 are the working gap and are filled with a viscoelastic fluid, for example, a polyistray P-20.

The seal is provided with a means 6 for holding a viscoelastic fluid in the working gap. When the holding means 6 is executed in the form of, for example, screw cutting (fit. 1), the latter is performed on shaft 2 at some distance from the disk 4 of the housing, and the space 7 from disk 3 to the screw cutting is also filled with viscoelastic fluid for example polyisobutylene P-20, and separates cavity 8 with high pressure P. from cavity 9 with low

pressure r.

Seal works as follows.

When the shaft 2 and the disk 3 are rotated, the viscous fluid in the gap 5 is rotated, making a circular motion in the stress state. There is an increase in pressure inside the fluid from the PO in the peri-periphery to P, in the central zone. Dav-

ten

)five

20

25

: The laziness created by the viscoelastic fluid is the counterpressure to the pressure P in the cavity 8. At the same time, the holding means, for example screw cutting, directed in the direction opposite to the shaft rotation, prevents the fluid from moving along the shaft, and thereby keeps it in the working gap 3.

When the holding means is made in the form of an additional disk (FIG. 2), the space 7 is also filled with a viscoelastic fluid, which, when the seal is working, tends to move along the shaft towards the working gap, thereby keeping the viscoelastic medium in the working gap 5 o

When the retaining means is made in the form of a sleeve mounted on the shaft rotatably relative to it (Fig. 3), the fluid acts as a fluid when the seal is working. It remains in the working gap 5, since the sleeve does not touch the shaft and is stationary in the elastic liquid rotation from the shaft.

Claims (6)

Invention Formula one . Seal rotating shaft on auth. St. R 731156, about tl and h a yu e e so that. In order to increase the sealing ability and the life of the seal, it is provided with a means of retaining it in a hydro-elastic fluid in the working gap. 2. The seal according to claim 1, about tl, which means that the holding means is made in the form of a screw thread on a shaft located in its area from the side of the body disk opposite to the shaft disk, This direction of cutting is opposite to the direction of rotation of the shaft, and the space from cutting to the disk of the shaft is filled in with an elastic liquid 3. Sealing pop, 1, characterized in that the means of holding is made in the form of an additional disk mounted on a shaft in a high pressure cavity, wherein the distance from the supplementary disk to the disk of the housing is equal to or greater than the radius of the latter, and the total space between the shaft disks filled with an elastic elastic fluid. 4, Seal under item 1, molded with e that means hold made in the form of a sleeve. mounted on the shaft with the possibility of rotation relative to it and located in the gap between the casing disc and the shaft with an emphasis on the shaft disc 5. Sealing according to claim 4, characterized in that the sleeve is fixed in the housing or housing disk. 6. Compaction according to claim 4, characterized by the fact that the cavity high pressure is filled with a visco-elastic fluid to a height at least equal to the diameter of the shaft disk. Compiled by G. Schurenko Editor I. Gorn Tehred L. Serdyukova Proofreader M. Pojo and -.-. i ..------- --.--- ------------ - - - Order 602/41 Circulation 812 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5. Production and printing company, Uzhgorod, st. Project, 4 -five