US2023017A - Pump unit - Google Patents

Description

Dec. 3, 1935. w HQUGH 2,023,017

PUMP UNIT Filed May 13, 1935 INVENTOR.

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Patented Dec. 3, 1935 UNITED STATES.

rum mm William R. Bough, Cleveland Helihtl, om, u-

signor to The Reliance Electric & Engineering gqlilrlnpany, Cleveland, Ohio, a corporation of Application May 1a, 1933, Serial No. 670,921

1 Claim. (01. 103-31) This invention relates to pumps. and more particularly pump units of rotary character; and it is among the objects of the invention to provide a construction which is effective and compact. Another object is the provision of construction guarding against vibration-damage. 'Other objects and advantages will appear as the description proceeds.

To the accomplishment of the foregoing and related 'ends, the invention, then, comprises the features hereinafter fully described, and particularly pointed out in the claim, the following description and the annexed drawing setting forth in detail certain illustrative embodiments of the invention, these being indicative however, of but a few of the various ways in which the principle of the invention may be employed.

In said annexed drawing:-

Fig. 1 is a side elevational view of an embodiment of the invention, the base being sectioned; Fig. 2 is a side elevational view of a modification; and Figs. 3, 4, and. 5 are like views of other modifications, parts being broken away for detail showing.

Referring to Fig. 1, there is shown a pump unit comprising a pump casing 2 of character to receive an internal rotatable member or rotor R, the precise detail of which may vary considerably, and need not be particularized. The

rotatable member is carried by a shaft 3 which is also the common shaft of the electric motor M. The latter has an end bracket 4 of usual or preferred form, and between the motor and the pump casing is a pedestal or support 5. This is of a form to take the place of one end bracket of the motor, and correspondingly provides a receiving-portion 6 to which the motor frame is bolted, and thence the pedestal extends into junction with the pump casing 2, the latter being bolted to a ring-extension I of the pedestal, the

space between the ring and the mounting portion 6 being windowed if preferred. With such arrangement, the weight-carrying support is applied at a point substantially at the load-center,

while a balance is also attained as regards vibration-stress; and particularly smooth-running results. By providing a liquid-catching surface on the pedestal, for instance as an expanded footpan 8, any liquid which might by chance leak out, may be caught, and by connection'of a drain pipe 9, may be led away to any suitable point of disposal.

As shown in Fig. 2, the ribs between the motor and the pump may be given a somewhat diflerent arrangement if desired. In both these constructions, the rotary pump-casing 2 is bolted to the ring-extension I of the pedestal, and the stufilngbox between the pump-casing and the shaft 3 is carried directly by the pump-casing 2.

Two bearings are sufllcient for the mounting 5' of pump units on the present order, and as shown more in detail in Fig. 3, these may comprise one bearing 1: at the outboard end of the motor, and another bearing b at the end adjacent the pump. The first-mentioned bearing is 10' carried in the end bracket of the motor, and the second is carried in the pedestal-portion which takes the place of the motor end bracket. The construction in Fig. 3 shows a further feature in that the stumng-box for the pump, in- 15 stead of being in the pump-casing 2 is in the adjacent pedestal portion Ill, and involves a packing-receiving recess II and a packing-gland II. On occasion for removing the pump-casing 2 by unbolting from the pedestal, the stufilng-box is 20 thus left undisturbed. Advantageously also, I may apply a bushing or sleeve I 3 to theshaft 3b, and thus in the event of operation upon gritcontaining liquids prone to work into the stuffing-box, any wear and cutting-out may be taken 25 by the wear-sleeve, which may be replaced, without necessity of replacing an entire shaft.

As a further showing of construction where the stuffing-box is carried wholly by the pumpcasing, Fig. 4 illustrates an arrangement of a 30 motor Mc bolted to the pedestal 5c, in lieu of the customary motor end bracket, the pedestal receiving at its other side the pump-casing 20 within which is a rotary member R of any suitable or preferred form. The casing has feed and 35 discharge connections ll, ii for the fluid to be pumped, and at the inner side next to the pedestal, but separate therefrom, is the stuffing-box lie with gland l2c. In such arrangement, on unbolting the pump-casing 2c from the pedestal. 40 the stufling-box also comes along.

Lubricant-reservoirs of capacious size may be provided in connection with the bearings, as indicated at l6, l1, Figs. 3 and 4, these being well protected in the general housed-in arrangement, 45 although permitting access for filling as required.

In some instances, in the stufllng-box I may employ a construction involving a recess I! about the shaft (see Fig. 5) and having an angle-wise passage l9 opening therefrom, within which a compression member 20, preferably screw-threaded, may be mounted. With this, a plastic packmg composition may be fed into the feed passage- I9. the compression member 2. being set up sufli- 55 ciently, and adequate'packing of the shaft 8d maybe had in a manner simple and direct.

By the provision of suitable openings above and below in the pedestal, a chimney or flueventilator action may be realized at the same time, for the cooling of the motor. As shown in Fig. l for instance, the pedestal is hollow and open below. At its convergence into the motora engaging cup-portion 6, there is an opening 2 I A further opening directly under the motor may be provided at 22. With such construction, the

r pedestal exerts a chimney-like effect, air drawing 1 be obtained according as the pedestal-housing I is provided with appropriate inlet and outlet openings. If fan blades be provided on the rotor,

this suction ventilation is correspondingly in' creased. Although air freely enters the motor, it will be noticed that entrance of water is prevented by reason of the splash-proof and dripi proof construction involving metallic partitioning and deflectors, as seen, on the side adjacent the pump.

It will thus be seen that a construction is available which is of extremely compact form, and particularly desirable for heavy duty work under unfavorable conditions where a pump must be operated for long periods without carefulattention. The moving parts are reduced to a minimum, and are mounted in a manner making possible an accurate assembly at point of manufac- I ture, thus obviating chance of poor alignment at installation, and furthermore guarding against vibration-stresses, and aflording a high standard of emciency in action.

Other modes of applying the principle of the i0 invention may be employed, change being made as regards the details described, provided the means stated in the following claim, or the equivalent of such, be employed.

I therefore particularly point out anddisll tinctly claim as my invention:-

A pump unit, comprising in combination a pump, an electric motor having a shaft aligned with said pump and connected to drive the same, and a common support for said pump and motor so located intermediately therebetween, said support including a pedestal and a windowed portion thereabove formed at one end for attachment of said pump thereto, and formed at the other end as an end-bracket for said motor, such end-.- 86 bracket forming a part of the motor casing and carrying the corresponding bearing for the motor shaft, whereby the motor stator may be removed without disturbing the pump assembly.

WILLIAM R. HOUGH.

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