US2020986A

US2020986A - Packing

Info

Publication number: US2020986A
Application number: US721472A
Authority: US
Inventors: Boris V Anoschenko
Original assignee: Westinghouse Electric and Manufacturing Co
Current assignee: CBS Corp
Priority date: 1934-04-20
Filing date: 1934-04-20
Publication date: 1935-11-12
Anticipated expiration: 1952-11-12

Description

Nov. 12,1935. B..'V. ANOSCHENKO 9,

' PACKING Filed Abril 20, 1954 F IG. 3

WITNESSES: INVENT 5.1112 Bows V. ANoscH o ATTORNEY Patented Nov. 12, 1935 ztzosss UNITED STATES PATENT OFFICE PACKING Boris V. Anoschenko, Philadelphia, Pa., asslgnor to Westinghouse Electric 8; Manufacturing Company, East Pittsburgh, Pa., a corporation of Pennsylvania Application April 20, 1934, Serial No. 721,472

3 Claims. (01.286-10) My invention relates to metallic sealing strips strip may be carried either by a fixed or by a for interposing resistance to leakage of fiuid between spaced members and it has for an object a to provide an improved type of strip as well as means for fastening the latter to its supporting member.

More particularly, my invention relates to relatively rotatable members wherein the space therebetween' is sealed by a thin metallic strip, which may be carried by either member, the strip being-disposed in and fitting against one side wall of a groove provided in a member and being held in the groove by a caulking strip which is deformed so that a portion thereof is engaged underneath or behind a shoulder provided by recessing the opposite wall of the groove. This type of packing is advantageous in-that the metallic strip may be made quite thin and susceptible of being worn down in case of rubbing. Also, the caulking strip may be made of material which is suitably soft, not only to facilitate deformation of the strip incident to fastening the sealing strip in place, but also to provide for easy removal of both strips, the deformed portion of the caulking strip engaging underneath the shoulder being sheared off by the latter incident to upward withdrawal of. the caulking strip from the groove. The sealing strip should, of course, be tough, resistant to corrosion, capable of being deformed to fit circular grooves, and susceptible of being worn down in case oi rubbing, and I- have foundthat molybdenum stainless steel satisfies these needs. Hence, a further object of my invention is to provide packing having these advantageous features of construction and of operation.

These and other objects are effected by my invention as will be apparent from the following description and claims-taken in connection with the accompanying drawing, forming a part of this application, in which:

Fig. 1 is a sectional detail view showing my improved packing;

Fig. 2 shows a modified form; and

Fig. 3 indicates diagrammatically how a caulkmg strip may be removed.

In Fig. 1, I show members l0 and II having a space I! therebetween, the space being sealed by the sealing strip l3 shown as being carried by the they may have relative movement',and the sealing.

movable member. This type of packing may be advantageously employed in many situations, for example, with glands anddummies of steam turbines and withbearings.

Referring now. to the sealing strip I3 and the manner in which it is connected to its supporting member, in Figs. 1 and 2, I show the strip hearing against one side wall ii of a groove it provided in the supporting member. A caulking strip 10 i1 is disposed in the groove and it has a lip ll deformed to engage behind the shoulder provided by the recess 20 formed in the opposite side wall II of the groove.

The sealing strip l3 and the caulking strip I'I llv and behind the shoulder and this operation caus- :6

ing. the strip to be pushed against the strip II so as to grip the latter with respect to the wall groove i5.

The gripping action referred to is in itself sum cient to hold the sealing strip It in place; how- 30 ever, 'a more secure fastening may be had by having' the sealing strip I3 provided with a foot 12 which engages-the bottom of the groove It, the top of the foot being engaged by the caulking strip II. In Fig. 2, I show a form of my inven- 36 tion wherein the strip it has no-footand is held in place by the gripp n action of the caulking strip l'l. p

I find that, if the strip 13 ismade of relatively thin molybdenum stainless steel, it has all of the 4 properties generally desirable for a sealing strip.

First of all, such material is highly resistant to it is connected, and will wear down readily in 45 case of rubbing; The caulking strip I1 is preferably made of soft steel as it should deform easily incident to mounting of the sealing strip and should have a portion thereof readily shearable as hereinafter pointed out. Referring to the radial recess 20 and to the caulking strip I! more specifically, it will be noted that the recess is ,disposed adjacent to the top portion of the groove l6 and that the upper or outer portion of the deformble strip is deformed so as to engage in the recess. The annular recess 20 is preferably provided by a cylindrical surface I9 and a conical surface I911. The cylindrical surface faces inwardly to form the shoulder behind which the deformable portion of the strip engages andit intersects the side surface or wall 2! of the groove to provide a sharp corner or shearing edge I922.

In case it is desired to replace the sealing strip, this may be readily done, as the caulking strip is made of such material and is so connected in the groove that it may be readily removed.

' As indicated in Fig. 3, it is only necessary to pry up one end of the caulking strip I! so that the end maybe engaged by the diametral opening 24 in a key 25 having a handle 26, whereupon the key may be turned and the caulking strip wrapped therearound, upward withdrawal of the caulking strip in this manner resulting in shearing oil. of the deformed portion engaging underneath the shoulder i9.

1 Not only do these features provide for ready tight insertion of the caulking strip and deformation thereof to engage in the recess, but also the shearing edge is effectively positioned relatively to the caulking strip to secure shearing thereof incident to removal of the strip.

While I have shown my invention :in-but one form, it will be obvious to those skilled in the art that it is not so limited, but is susceptible of vari.

" ous changes and modifications, without depart- 7 ing from the spirit thereof, and I desire, therefore, that only such limitations shall be placed thereupon as are imposed by the prior art or as are specifically set forth in the appended claims.

What I claim is: I 1. The combination with a pair. of members having a space therebetween, of sealing means for said space including a thin metallic strip fitting against one side wall of a groove provided in one of said members and having its outer edge 10 defining close clearance with respect to the other member; the opposite wall of said groove having a recess formed therein near to the top of the groove; and a caulking strip in said groove, fitting against the "strip and against said opposite 15 wall inwardly of the recess, and having its outer portion deformed to engage in the recess.

2. The combination with a pair of members having a space therebetween, of sealing means for said space including a thin metallic strip 90 fitting against one side wall of a groove provided in one of said members and having its outer edge defining close clearance with respect to the other member; the opposite wall of said 3. The combination as claimed in claim 2 35 wherein the caulking strip is grooved at its top to provide a lip portion deformable to engage in said recess.

BORIS V. ANOSCHENKO.