US1888957A

US1888957A - Sealing gland

Info

Publication number: US1888957A
Application number: US414481A
Authority: US
Inventors: Charles I Longenecker
Original assignee: Chain Belt Co
Current assignee: Chain Belt Co
Priority date: 1929-12-16
Filing date: 1929-12-16
Publication date: 1932-11-22
Anticipated expiration: 1949-11-22

Description

NW 22? 193 c. n. LONGLENECKER y w SEALING GLAND Filed Dec. 16, 1929 5 Sheets-Sheejt l ATTORNEY f CI. 5. LQNGENECKER 5 EALI NG GLAND Filed Dec. 16, 1929 5 Sheets-Sheet 2 lmf b Q ATTORNEY) Nmn 22 1932.

c. a. LoNGN-EcKER SEALING GLAND 3 Sheets-Sheet 5 Filed Dec. 16, 1929 INVENT R.

Patented Nov. 22, 1932 UNITED STATES- PATENT oFtca GHAELES I. LONGENWKEB, OI MILWAUKEE, WISCONSIN, ASSIGNOR TO CHAIN BELT COMPANY, OF MILWAUKEE, WISCONSIN, A CORPORATION OF 'WISCOIfl'SIN SEALING- GLAND Applicationfled December 16, 1929. Serial No. 414,481.

The present invention has for its object to provide a packing or sealing gland that is adapted for use in a wide variety of situation". it has been found especially useful in connection with a mortar mixer and is so illustrated in the accompanying drawings, such illustration, however, being typical rather than intended as limiting the invention to a particular use.

In the accompanying drawings: 7

Figure l is a sectional elevation illustratingthe invention applied to a mortar mixing.

Figure 2 is a longitudinal sectional view one the packing boxes on a much scale than Figure l a use b is a detail end view of the suppiece 8; and Figure l is top plan or the same; and ure 5 is a :Eace view or the gland hon. the accompanying drawings 2 represents trough or receptacle in which a mining optc" T end walls of this receptacle are 3, and 3? indicates the lip or edge i-. opening into the receptacle along one I reef. The mining receptacle 2 is rotative movement in stationary A hearings l, and to effect this it is provided at each separable pivotal support,

each. designated, as a whole, icy-8. To this support is secured a handle 38 by which the receptacle may he manually turned in its hearings for the purpose of discharge or for otherreasons. It is obvious that the handle 38 may be secured directly to the receptacle should this he found desirable. Extending through this receptacle is a shaft 5 carrying mining or agitating blades 5. It is well lrnown in the making of mortar, and in many other operations, difiiculty is experienced in preventing the material being operated upon, if of a liquid or semi-liquid consistency, from escaping from the mixing receptacle through the openings in the end walls for the shaft carrying'the mixing blades. The present invention provides an improved gland or pack-- ing that very effectively seals the receptacle against the escape of the fluid or semi-fluid contents thereof; and at the same time pertahes place, such as the making oi mits limited longitudinal back and forth movements of the shaft due to the stresses imposed thereon by the passage of the mixing blades, which are usually inclined, through the material within the receptacle. The openings in the walls 3 through which passes the shaft 5 are designated 4, and are considerably larger in diameter than the one or the openings a, engaging with the edge thereof.

12 indicates a hollow cylindrical p0 of the casing 8, adapted to e seated hearing 7 and constituting a joumal for 4; c receptacle 2. A hearing sleeve or bushing 3 is interposed hctween the journal part 12 i the shaft 5, in which the latter turns, T1 15 uniting the hashing to the part 12;

' communicating lubricating openings ex tend through them.

A shell portion 1a of the pivot piece unites the

parts

11 and 12 thereof and serves to house the gland, to he described.

13' indicates a flexible diaphragm, formed of rubber or other suitable material, secured to the inner face of the wall 3 oi the mixing receptacle, perforated for the passage of shaft 5 and disposed concentrically with. the opening 4. The inner edge of the diaphragm extends beyond the edge of the opening and the central perforation through it is somewhat larger in diameter than the shaft. The diaphragm is secured in position'hy the bolts 9, and a clamping plate 18, located inside the receptacle.

A gland her: 19 is located within the housing portion 14 of the pivot piece 8, it is formed with a marginal rim 20, that lies outside the inner edge of the diaphragm, to which it is tightly clamped loy means of Secured to each end wall of the casbolts 21 and a clamping ring 22, and with a hollow outwardly extending cylindricalportion 23, that is concentric with the shaft 5 and has an inturned rim or end plate 24, in which is formed an opening for the shaft, such opening being sufliciently large to allow the shaft to pass through the same without contact therewith.

A flanged ring 25 is secured to the shaft by means of a set bolt 26, the outwardly extending flange portion 39 thereof being in the plane of the diaphragm 17, while the ring 25 fits the shaft and extends inwardly, that is into the receptacle 2. llhe gland 27 is of a hollow cylindrical shape and fits within gland box 19. A still coiled spring 28 is compressed within the gland, with one end bearing against the end plate 24 of the gland box, and the opposite end resting against an inturned flange 29- of the gland. The spring has a tendency to move apart the gland and gland box, any relative movements of these two parts being guided and directed by a, pin carried by the gland box, and entering a slot or guiding groove 36 formed in the gland.

It will be seen that the exposed face of the inturncd flange 29 of the gland is in close engagement with the outer face of the flange 39 of the ring 25; and that the clampmg ring 22, engages with the inner face of the flange 39 of the ring 25. Since the spring 28 acts upon both the gland and the gland box, tending to force them apart, and since the

parts

29 and 22, respectively carried by the gland and gland box, engage with opposite faces of the flange 39, it follows that there are provided closely fitting engagmg surfaces constituting liquid-tight runrung joints between these parts. lit will he understood that the

parts

22, 25 and 29 are of suitable metal machined to have smooth and parallel opposing surfaces.

lhe engaging surfaces just described may be kept lubricated through the following instrunientalities. 30 indicates a grease or oil channel formed in a portion of the gland box and communicating with an opening 31 adapted to receive the end of the tube or" a grease cup 32. The channel 39 communicates, through the space between the inner edge of the diaphragm 17 and the outer edge of the flange of the ring 25, with a channel 33 formed in the gland for communicating with the outer face of the flange of the ring 25, being thus arranged to deliver lubricant to the engaging surface of the

parts

25 and 29. The lubricant reaches the engaging surfaces of

parts

22 and 25 through the space between the edges of the diaphragm and the flange of the ring 25.

The inner edge of the clamping plate 22 is preferably bevelled as indicated at 34 for the purpose of reducing the'area of the opposmg parallel surfaces between the parts22 and 25, in order to reduce the liability of objectionable material collecting at this loca- It will also be observed that the inner edge of the diaphragm 17 is clamped between members of the gland, the flexibility of the diaphragm allowing the gland to move back and forth to a limited extent along with the shaft as it moves longitudinally in its bearings 13 due to the forces that are transmitted to it from the inclined mixing blades as they are forced through the contents of the receptacle 2. 1

It will be seen that the packing for the shaft 5, including the gland box 19 and the gland 27 is locatcd between the stationary support or hearing 7 for the receptacle and the receptacle itself, that is, it is external to the receptacle; and this arrangement has been found most desirable, if not essential, to secure a perfect packing against the escape of material while being treated in a mortar mixer. Further, the packing is floated, that is, it has a limited freedom of movement due to the slight axial longitudinal movements of the shaft 5, which take place in the operation of the machine, this being permitted by reason of the interposition between the packing and the receptacle of the flexible diaphragm 17. The portion 14 of the attachment 8, carrying the trunnion-like support for the receptacle, which is specifically shown as in the form of a housing "for the packing, operates as a bridging piece or part between the trunnion and the receptacle, constructed to permit the location of the packing outside the receptacle and between it and the bearing in which the receptacle tilts for discharging and other operations. llhe arrangement de scribed insures there being a clear space between the bearing in which the shaft 5 turns and the packing means employed to prevent leakage of material from the receptacle along the shaft, so that danger of corrosive, gritty or other objectionable material escaping and getting into the shaft bearing is reduced to a minimum.

What is claimed is:

1. A sealing gland for a rotating shaft entering a receptacle, comprising a ring carried by the shaft, sealing plates engag ng with opposite faces or the ring and a spring acting upon the said sealing plates and operating to force them in opposite directions and into engagement with the ring.

2. A sealing gland for a rotating shaft entering a receptacle, comprising a sealing ring rotating with the shaft. non-rotating plates engaging with opposite faces of the said ring to constitute therewith fluid-tight joints, and

till

lot

are

a single spring arranged to force the sealing plates in opposite directions to enga e with the sealing ring acting to. hold the said plates in sealing engagement with the said ring.

3. In a packing for a rotating shaft that enters a receptacle, an attachment to be secured to an end of the receptacle constructedto carry a bearing for the said shaft set off from the end of the receptacle, a floating land box arranged in the space between the earing and the end of the receptacle, a gland within the gland box, the gland and gland box having respectively engagement with the opposite faces of a ring carried by the shaft and a spring for moving the land and gland box relative to each other to force surfaces of the said parts into sealing engagement with the ring.

4. A sealing gland for a rotating shaft entering a receptacle, comprising a support member surrounding the shaft and secured to the receptacle, the support constructed to form a housing, a flexible diaphragm through which the shaft passes without engagement secured to the receptacle, a floating gland box located within the housing of the support member, means for uniting the said gland box with the diaphragm near its inner edge, a ring carried by and rotating. with the shaft, agland located within the box engaging wit one face of the ring to constitute a sealing P joi t, a part carried by the gland box engaging with the opposite face of the ring to constitute another sealing joint, and a spring acting upon the gland box and the gland to force the respective parts thereof that constitute the sealing joints into working engagement with the shaft-carried ring.

5. A packing for a rotating shaft entering a receptacle through one of its walls, comprising an annular flexible diaphragm through which the shaft passes secured to the receptacle wall, a support member also secured to the receptacle wall. such support member being formed with a journal portion adapted to be mounted in a stationary bearmg to permit the receptacle to have ,rotative movements, and with a housing poition between the said journal and the wall of the receptacle, a gland box for the shaft located within the housing of the support member, means for securing the diaphragm near its inner edge to-the said gland box including a clamping plate, a gland located within the gland box, a ring carried by and turning with the shaft, located between the clamping ring and the gland, which parts are in sealing engagement with the opposite surfaces of the ring, and a spring acting upon the gland box and the gland for forcing both the aforesaid sealing portions into engagement with the shaft-carried ring.

6. A sealing gland such as stated in claim '3 including means for lubricating the opposite sealing surfaces of the shaft carried ring.

ceptacle concentric with the 7 The combination with a receptacle and a rotatable shaft extending through the opposite walls of the receptacle, of a packing external to the receptacle surrounding the shaft where it passes through a receptacle wall to prevent leakage from the receptacle,

the wall of the reshaft means for intimately associating the packing with the inner edge of the diaphragm, the flexibility of the latter permitting limited longitudinal movements of the shaft and of the packing considered as a whole, a ring, carried by and turning with the shaft, the packing being constructed to have sealing plates engaging respectively with the opposite faces of the shaft-carried ring and a spring arranged to force the sealing plates of the packing respectively in opposite directions into close engagement with the ring.

8. The combination with a receptacle and a rotatable shaft passing from within to without the receptacle, a supporting part attached to the wall of the casing through which the shaft extends, constructed to have a bearing in which the shaft turns, and a br dging portion between the bearing and thevwall of the receptacle itself, a floating packing located between the receptacle wall a diaphragm secured to h and the support, a. flexible diaphragm interosed between the said floating packing and the wall of the receptacle by which the packing is held and maintained against rotation and means for maintain ng the parts of the floating packing in constant and close engagement with parts rotating with the shaft.

9. In a packing for a rotating shaft that enters a receptacle, employed to prevent the escape of material within the receptacle, an attachment to be' secured to an end of the receptacle constructed to carry a bearing in which the said shaft turns and having a br dging part whereby the said bearing is set off from the receptacle end, and a packing for the shaft located in the space between the bearing and receptacle and separated from the bearing by a clear space.

10. The arrangement stated in claim 9 further characterized by the bridging portion of the attachment being in the form of a housing serving to cover and protect the packing.

11. The arrangement stated in claim 9 with the further feature of a flexible diaphragm located between the packing and the end of the receptacle permitting limited floating movements of the packing.

In testimony whereof I affix my signature.

CHARLES I. LONGENECKER.