US2372423A - Packing device - Google Patents

Description

March 27, 1945 H. HORNSCHUCH a 2,372,423

PACKING DEVICE Filed Jan. '7, 1944 I INVENTOH flglvzndflornsclzuelv.

HIS ATTORNEY.

ing liquid to the lantern.

Patented 27, 1945 tum-ran STATE PA ENT OFFICE Harms Hornschuch, Easton, 1 a"- assignor to Ingersoll-Rand Company, New York, N. Y., a

corporation of New Jersey 1 Application January 7, 1944, Serial No. 517,391

- 1 Clalnu (c1; 286-27) This invention relates to packing devices, and

'- or the bore 31 and the sleeve :4

more particularly to a packing device for shafts of centrifugal pumps and the like.-

One object of the invention is to assure the interception of all. such fluid as may leak from 5 the stufllng box of a pump and thereby prevent the splashing of such fluid upon the'external parts of the pumping mechanism or upon an attendant operating the pump.

Other objects will be in part obvious part pointed out hereinafter.

In the drawing accompanying this specification and in which similar reference numerals refer to similar parts, A

Figure 1 is, a longitudinal elevation, partly, in

section, of a centrifugal pump equipped with a packing device constructed in accordance with the practice of'the invention,

Figure 2 is an elevation, in section; of ing compressor,

Figure 3 is a transverse view taken through Flgure2 on the line 3-4, and Figure 4 is an .end view of the packing compressor.

the packand in it) to the atmosphere. To this end the gland 4| is provided with 7 a casing 42 that encircles the gland and has an aperture 43 in one end to receive a tubular terminal portion 44 of the stuffing box 3'8. The aperture 43 is only sufiicientl larger'than the peripheral surface of the tubular portion 44 to enable the casing 42 to slide freely axially of the stufllng box. The opposite end wall 46 of the casing 42 is also provided with an aperture 45 to accommodate the sleeve 34 in a like manner.

The gland 4|, which is preferably formed in- I tegrally with the casing 42, is of annular shape I and is joined to the end wall 45 ofthe casing by a skirt portion 41 and to theslde wall of the easing 42 by radially extending ribs #8. The skirt portion 4'! is suitably perforated to permit such fluid as may leak along the shaft into the gland to pass into the casing 42. The compressor com- Referring more particularly to the drawing, 28

designates a centrifugal pump of the horizontal type, and 2! a pump'casing that is recessed to provide a pumpingchamber 23 for the accord-- modation of an impeller 24 serving to impel liquid from an inlet opening 25 to a discharge opening 26. V

The casing 2i issupported by a main frame 21 and secured'thereto by bolts 28, and in the main frame is a bearing 29 for a shaft "that extends into and is secured to the hub 3| 0! the impeller 35 24 by a key 32. A cap screw 33 threaded into the shaft seats against the hub SI for retain ing the impeller upon the shaft and for pressing the hub against an end of a sleeve 34 encirclin 20 prising the gland and the casing 42 is shown as being constructed of two parts 49 and 50 which differ only from each other in that the part 50 is provided witha drain tube '5! for the escape of fluid from the interior 52 of the casing 42.

The casing parts 49 and 50 are firmly clamped together by bolts Stand on opposed sides of the parts, adjacent the bolts, are lugs lit that coop- I mate with each other to define slots 55 for the w; accommodation of stud bolts 56 threaded into through the aperture 46 to the exterior of the the shaftanri seating at its other end against a shoulder on the shaft.

0n the side of thecasing 2| adjacent the pumping chamber 23 is a stumng box that extends into the main frame and in its bore 31 are rings 'of plastic packing material 88 that encircle the sleeve 34. A lantern 3B is arranged in the intermediate portion of the bore 31, and a conduit is threaded to the stumng box for supplying seal- The packing material 38 is compressed by a gland 4i that extends 'slidably into the outer end of the bore 81,- and the gland, constructed in accordance with the practice of the invention, carries means for intercepting'such fluid as mayleak from the pumping chamber 23 along the surface-r casing 42.

",In operation, the gland 4! is actuated, in the 'usualmanner, for compressing the packing material 38 by manipulating the nuts Bl. Being integral with-the gland theccasing 42 will move with it and will, therefore, always be in position to receive any fluid that may leak out of the stufilng box and willalso act as a fender to prevent the splashing of fluid from the shaft I into the atmosphere.

In practice, the present invention has been found to be particularly advantageous for use on pumping mechanisms serving-to pump chemicals.

that may cause damage to, parts of the pumping mechanism that are-not particularly suited to withstand the corrosive action of the fluid. It is,

shaft, a casing having an opening at one end to 10 receive the end 01 the tubular extension and having a. chamber to receive fluid leaking along the wall of the bore and along the shaft, a gland within the casing for compressing the packing material, and a skirt to connect the gland to the casing and being perforated to permit the passage of fluid from the interior of the gland into the chamber.

HANNS HORNSCHUCH.

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