US2957428A

US2957428A - Rotary pump housing and bearing mounts

Info

Publication number: US2957428A
Application number: US617834A
Authority: US
Inventors: Owen A Meyer; Sigurd J Andreasen
Original assignee: Individual
Current assignee: Individual
Priority date: 1956-10-23
Filing date: 1956-10-23
Publication date: 1960-10-25
Anticipated expiration: 1977-10-25

Description

1960 o. A. MEYER ETAL ROTARY PUMP HOUSING AND BEARING MOUNTS Filed Oct. 25, 1956 INVENTORS Owen A. Meyer Sigurd J Andreasen BY W THEIR AGENT United States Patent ROTARY PUMP HOUSING AND BEARING MOUNTS Owen A. Meyer and Sigurd J. Andreasen, both of 1004 E. Wise, Bowie, Tex.

Filed Oct. 23, 1956, Ser. No. 617,834

1 Claim. (Cl. 103-126) This invention relates to improvements in rotary gear pumps, and more particularly to a rotary gear pump housing and bearing arrangement.

The life of a rotary gear pump, as disclosed in our copending application, filed March 5, 1956, for Rotary Pumps, Ser. No."569,596, now Patent No. 2,833,224 can'bematerially' lengthened, and wear on the pump alleviated, by the utilization of the housing and bearing construction as set forth herein. The present construction enables the pumping of highly abrasive material, while maintaining the abrasive particles thereof out of contact with the bearings.

Various arrangements of gear pump housings and bearings have been proposed heretofore, but these, for the most part, involved the use of a complex casing arrangement, which added to the cost of machining, as well as adding to the number of parts subject to wear, and increasing the likelihood of leaking.

In the present invention, a pump casing, substantially as shown in our above designated co-pending application, is provided, except for the end plates and the bearing mounts.

An object of this invention is to provide an improved unitary end plate and bearing mount for a rotary pump casing.

Another object of this invention is to provide an end plate and anti-friction bearing mount for a rotary pump casing wherein the bearings are spaced apart in a fixed relation.

Still another object of the invention is to provide an end plate for a rotary pump housing wherein the bearings thereof are sealed against entrance of mud or other foreign matter.

Yet another object of this invention is to provide end plates and bearing mounts for the housing of rotary pumps which are simple in construction, strong, easy to assemble and disassemble, and relatively inexpensive to manufacture.

With these objects in mind and others which will become manifest as the description proceeds, reference is to be had to the accompanying drawings in which like reference characters designate like parts in the several views thereof, in which:

Fig. 1 is a top plan view of the device embodying the invention, and showing parts broken away and other parts shown in section, to bring out the details of construction;

Fig. 2 is a sectional view taken on the line 2-2 of Fig. 1, looking in the direction indicated by the arrows;

Fig. 3 is a sectional view taken on the line 3-3 of Fig. 2, looking in the direction indicated by the arrows.

With more detailed reference to the drawing, the numeral 1 designates generally a pump housing having end plates 2 and 4, which end plates are secured to the pump housing 1 by means of cap screws 6. The pump housing 1 has

shafts

18 and 20 therein on which are fitted gear rotors 8, which rotors 8 draw fluid through an inlet opening formed on one side of said housing and discharge fluid through an outlet opening formed in the opice posite side of said housing. The inlet opening and the outlet opening each is surrounded by a plane face, which has bolt holes therein, which forms a companion face for a pipe flange, as is fully set forth in the above mentioned co-pending patent application.

The respective end plates 2 and 4 of housing 1 abut I against the respective gaskets 10 thereon. Each of the end plates 2 and 4 has a pair of stufling boxes 12 thereon, in which stuffing boxes glands 14 are fitted. These glands 14 surround the

respective shafts

18 and 20, so as to cause a sealing action between the respective packing elements 22 and the respective shafts and the stufling boxes 12. The packing glands 14 each have a pair of stud bolts 24 passing therethrough, which stud bolts are attached to the respective end plates 2 and 4, so as to draw the respective glands 14 into binding engagement with the packing elements 22. The glands 14 seal the

respective shafts

18 and 20 against leakage of fluid from within the housing 1.

Each of the end plates 2 and 4 has outwardly extending arms 28, as will best be seen in Figs. 1 and 3, which arms are made integral with the respective end plates. The arms on each of the end plates carry a cylindrical bearing housing 30. The respective bearing housings 30 are positioned on the outer ends of the respective sets of arms a spaced distance outward from the respective end plates 2 and 4. Each cylindrical housing 30 is a suflicient distance outward from the end of the stufling box 12, so that the respective glands 14 may be moved outward to admit the insertion of packing elements 22 into the respective stuffing boxes 12, between the outer end thereof and the inner end of the respective glands.

Bearings 32 are provided in each of the cylindrical housings 30, and are preferably of the anti-friction, ball or roller type. These cylindrical housings 30 are provided with the respective seals 34 and 36, to prevent leaking of lubricant therefrom.

Annular rubber baflles 38 surround the

respective shafts

18 and 20, intermediate the outer end of the stufling box glands 14 and the inner face of the respective cylindrical bearing housings 30, which annular rubber baffles are in close fitting relation to the respective shafts, and extend radially outward therefrom a sufficient distance to deflect any mud or fluid leakage that might occur intermediate the respective shafts and the respective stuffing box glands. The annular rubber baffles also serve to direct the fluid being leaked, radially outward, by centrifugal force, when the pump is running at the normal rate of speed.

The fluid being pumped is heavy and contains solid abrasive particles, but by the provision of the rubber baffles 38, on

shafts

18 and 20 fluid that might leak from the stuffing boxes 12 is directed radially outward from the shaft, and by having the bearing mounts sealed against the fluid being pumped, the life of the pump and associated mechanism is lengthened, but at the same time, a pump and pump housingare provided which effectively handle the material, to force this material to a point of use remote from the place of mixing.

The pump may be driven by a gear or sprocket 40 positioned on the outer end of shaft 18, or by other conventional method. The gear rotors of the pump may be rubber covered, as indicated at '42, and which feature is shown and described in detail in our above mentioned co-pending application.

While the invention has been described and illustrated in some detail for one embodiment thereof, it is to be understood that changes may be made in the minor details of constructions for different installations and materials, without departing from the spirit of the invention or the scope of the appended claim.

Having thus clearly shown and described the invention, what is claimed as new and desired to be secured by Letters Patent is:

A gear pump housing having a pair of parallel shafts extending therethrough, on each of which shafts a gear rotor is mounted, said gear rotors being adapted to intermesh; an integrally formed end member secured to each end of said gear pump housing, each of which end members comprises a plate, three arms outwardly extending from said plate, which arms lie in a medial plane passing through the axes of said parallel shafts, and a bearing housing formed at the ends of said arms between each pair thereof, said end plates each having spaced apart apertures formed therethrough and an aperture formed through each said bearing housing, which apertures in said end plates and in said respective complementary bearing housings being in axially aligned relation, the respective ends of the respective parallel shafts extending outward through the respective apertures in said end plates and into the respective complementary apertures in said bearing housings, a pair of stufling boxes on each of said end plates, one of which stufiing boxes surrounds each of the respective shafts where it extends through the respective end plates, a packing element within each of said stutfing boxes, which packing elements surround a packing gland fitted within each of said stufiing boxes in close fitting relation with the packing element therein, a bearing in each of said bearing housings, which bearings journal the respective shafts therein, a lubricant retaining seal in each of said bearing housings in position to surround the respective shafts, an annular rubber bafiie mounted on each said shafts intermediate the stufi'ing box thereon and the bearing housing thereon, each side of said gear pump housing having an opening formed therein which openings form fluid passages, said openings being in a medial plane passing through said gear pump housing between said shafts, a plane face surrounding each of said openings of said pump housing, which plane faces have bolt receiving holes formed therein, each plane face surrounding the respective openings being adapted to register with a pipe flange or the like.

References Cited in the file of this patent UNITED STATES PATENTS the respective shafts,

1,005,586 Webb Oct. 10, 1911 1,478,417 Wottring et al. Dec. 25, 1923 2,070,192 Zarafu Feb. 9, 1937 2,135,308 Killam Nov. 1, 1938 2,622,945 Nickle et al Dec. 23, 1952