US1520939A - Pump sealing and testing device - Google Patents

Description

Dec, 30, 1924.

I o. H. DORER PUMP SEALING AND TESTING DEVICE Filed Jan. 10, 1921 INVENTOR BY .ms ATTORNEYS Patented Dec. 30, 1924.

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i ii" a OSCAR H. DOB/EB, OF NE-IVARK, NEW JERSEY, ASSIGNOR TO 9V0It'lll-IIJXIGT0N PUMP AND MACHINERY CORPORATION, OF NEW YORK, N, '1 A CORPORATION OF VIRGINIA.

PUMP SEALING AND TESTING: DEVICE.

Application filed January 10, 1921.

T 0 all whom may concern.

Be it known that I, OSCAR H. Donna, a citizen of the United States, residing at Newark, county of Essex, and State of New Jersey, have invented certain new and useful lmprovements in Pump Sealing and Testing Devices, fully described and represented in the following specification and the accompanyingdrawings, forming a part ofthe same.

This invention relates to improvements in devices for liquid sealing pump bearings and determining the amount of leakage into the pump.

It is the especial object of the present invention to provide a device of this character which will efficiently seal the pump against air leakage and indicate the amount of sealing leakage. The invention is especially applicable to pumps used in sugar manufacture, or elsewhere, where a number of such pumps are used in a single system, so that when leakage in any pump is so great as to be detrimental to the product or efficient operation of the plant, the pump may be quickly located and repacked or otherwise repaired. I aim to provide such a device which may be readily applied to pumps of standard design, or to old pumps, and to so form the liquid-holding receptacle and its supporting means that loss of the measuring liquid in any way is prevented except by leakage into the pump.

For a full understanding of they inven tion, a detailed description of a preferred construction for carrying the same into effect will now be given in connection with the accompanying drawings, and the'novel features thereof then be specifically pointed out in the claims.

In the drawings Figure 1 is a side elevation, partly in section, of my improved device shown in connection with a single stage centrifugal pump of standard design;

Figure 2 is a section on the line 22 of Fig. 1;

Figure 3 is a section on the line 3-3 of Fig. 1, and

Figure 4 is a vertical section on the line 4-4 of Fig. 8.

Referring now to the drawings, and particularly to Fig. 1, A indicates generally a single tage centrifugal p mp of Well Serial No. 436,081.

knowntype, B the impeller shaft thereof, and C the casing of one of the outside bearings of the pump shaft.

In order to accurately determine the amount of leakage into the pump through which the pump shaft passes, this receptacle being mounted on a brass or other suitable metal bushing 12 having a number of radial perforations 13 communicating with the intenor of the receptacle 11, such bushing forming in effect an extension of the stuffing box. Arranged in the stuffing box are the usual packing rings 1, such rings being separated by a distance piece 2 at a point radially in line with the openings 13 in the bushing 12, so that the shaft B, where it passes through the receptacle 11, is freely accessible to the liquid in the receptacle at the point where such shaft enters the packlng rings on each side of the distance piece 2.

The gland 10 is preferably and as shown a split gland, the parts of which are held together by bolts 3. Swing bolts 4 pivoted to the pump casing by bolts 5, seat in recesses in the edges of the gland sections and, through the medium of nuts 6 hold the device securely in position and at the same time place the packingrings under proper compression, while the gland parts may be released for removal by loosening nuts 6 and swinging the bolts 4 outward, thus permitting the receptacle 11 to be moved longitudinally of the shaft to facilitate repacking. The sides of the receptacle 11 have formed therein U-shaped openings through which the bolts 4 pass, thus preventing turning of the device on rotation of the shaft. On the bolts 4 are nuts 7 for holding the receptacle 11 tight against the pump casing.

The receptacle 11 may be drained by removal of the screw plug 8, which is readily accessible through an orifice 9 in the bearing supporting extension of the pump frame.

It will be observed that due to the small shaft area exposed to the water, taken in connection with the distance piece and the small openings in the bushing 12, and the height of the sight opening in the top of such receptacle from the shaft, there is no danger of any of the measuring liquid being thrown off by centrifugal force on rapid revolution of the pump shaft.

Vhat is claimed is:

1. A liquid sealing and leakage testing de vice for centrifugal pumps and the like, comprising a liquid receptacle surrounding a stuffing box packing, a distance piece interposed in said packing and arranged to permit access of liquid in said receptacle to the pump shaft, and means for holding said re ceptacle in place with its interior radially in line with said distance piece, said means including members arranged to open to permit said receptacle to. be moved longitudinally of the shaft for access to said packing.

2. A liquid sealing and leakage testing device for centrifugal pumps and the like, comprising a receptacle surrounding a stufiing boX packing, a perforated bushing between said packing and said receptacle, a distance piece interposed in said packing at a point radially in line with the perforations in said bushing to permit access of liquid in said receptacle to said shaft, a packing gland on the outside of the receptacle, and means for '35 holding the receptacle in place.

3. The combination with a pump and its outside bearing and stuffing box between the bearing and pump, of a liquid receptacle 11 forming a part of the stufiing box and having packing on both sides of said liquid receptacle, perforated bushing 12, said packing being divided to permit the flow of liquid from the receptacle to the shaft, divided gland 10, and swing bolts 4: arranged to cooperate with said gland to compress the packing and hold the receptacle in place on the shaft.

In testimony whereof, I have hereunto set my hand.

OSCAR H. DORER.

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