US2251807A - Pump - Google Patents

Description

Patented Aug. 5, 1941 PUMP Edward J. Ruthman, Cincinnati, Ohio Original application September 11, 1936, Serial 100,343. Divided and this application January 6, 1939, Serial No. 249,627

2 Claims.

This invention relates to improvements in a circulating pump such as is used for circulating lubricant, cooling medium, cutting compound, and the like, relative to a machine tool.

One of the principal objects of the present invention is the provision of a circulating pump in which the pump housing is so arranged as to be conveniently attached to a tank, or a machine tool or the like, and in which the discharge pipe may be arranged within the tank, machine tool or the like.

Another object of this invention is the provision of a circulating pump in which the intake and exhaust are arranged in close proximity to one another, whereby the pump as a whole may be mounted so as to utilize the least amount of space.

A further and specific object of this invention is the provision of a circulating pump having an additional and direct supply of fluid for the impeller of the pump.

It is also an object of this invention to provide a novel pump housing which will accomplish the objects above and include otherwise the features of the invention disclosed in co-pending application, Serial No. 81,043.

This is a divisional application of co-pending application of Edward J. Ruthman, Serial No. 100,343, for a Pump, filed September 11, 1936, now Patent No. 2,143,032.

Other objects and advantages of the present invention should be readily apparent by reference to the following specification considered in conjunction with the accompanying drawing forming a part thereof and it is to be understood that any modifications may be made in the exact structural details there shown and described, within the scope of the appended claims, and without departing from or exceeding the spirit of the invention.

In the drawin Fig. 1 is a vertical sectional view through a self contained circulating pump showing this invention.

Fig. 2 is a horizontal sectional view taken on line 2-2 of Fig. 1.

Fig. 3' is a horizontal sectional view through the pump housing, and taken on line 33 of Fig. 1.

Fig. 4 is a reduced vertical sectional view illustrating the passage through the pump body taken on line 4-4 of Fig. 1.

Throughout the several views of the drawing, similar reference characters are employed to denote the same or similar parts.

, In the past, circulating pumps of the centrifugal type have been produced with the intakes and exhausts radially spaced from one another with respect to the axis of the impeller. By this construction, the discharge pipe was located externally of the tank or machine tool with which the pump was employed and this frequently resulted in an inconvenient arrangement of parts. By the present invention, the intake and exhaust are arranged at the same side or face of the pump housing, and preferably through the mounting flange for the pump.

Specifically referring to the drawing, and particularly to Fig. 1 thereof, the numeral I0 indicates a motor disposed above a pump, indicated by the reference numeral I I. The motor I0 and pump II are connected to one another by an extension or connecting housing I2. The motor I0 includes an upper housing I3 and lower housing I4, between which is the stator ring I5. The upper housing I3 is provided with a bearing seat It in which is seated the ball bearing IT. The lower housing is likewise provided with a bearing seat I8, in which is seated a ball bearing I9.

Rotated on said ball bearings I1 and I9 is a shaft 20 which extends through the motor I0, connecting housing I2 and into the pump II. The shaft 20 has secured to it, at a point within the stator ring, the rotor 21 of the motor. Secured to the shaft 20, immediately beneath the bearing I1, is a fan 22 having a plurality of spaced blades 23. The flange of the fan, above the blades 23, is formed into a cup shaped receptacle 24, and the said receptacle is utilized to prevent lubricant, supplied to the bearing I1 through the oiling fixture 25, from contacting the motor rotor and stator parts. Any lubricant within the receptacle 24 is centrifugally ejected therefrom against the inner wall 26 of the dome end 21 of the motor housing I3. The lubricant flows through this housing to and through apertures 28 formed through the wall of the motor housing I3 at the bottom of the dome 21. To assist the outward flow of the centrifugally discharged lubricant, the lower walls of the apertures 28 extend inwardly towards the fan 22, as illustrated at 23. The inner end of the wall or shelf 29 turns upwardly to provide the lip 30, which is closely adjacent the periphery of the fan. The lip 30 and the shelf 29, in addition, intercept any lubricant that would flow over this receptacle 24, and would therefore again prevent this excess lubricant from engaging with the motor parts.

The lower housing I4 is provided with an oiling duct 3| which terminates at its inner end at the bearing I9 and at its outer end has the oiling fixture 32. Beneath the bearing 19, the shaft 20 has secured to it a centrifugal throwout member or vane 33 which prevents mist or spray and the like, rising within the extension housing 12, from engaging the motor parts. This moisture and the like is intercepted by the centrifugal throwout member 33 and discharged through the ducts or ports 34 formed radially through the flange 35 at the upper end of the connecting housing [2. with a plurality of apertures, through each of which projects a bolt 36 for connecting the said housing l2 to the motor housing l4.

The lower end of the connecting housing I2 is provided with a radial flange 31, through which projects a plurality of bolts 38 for connecting the extension housing l2 to the pump H.

The flange 35 is further provided modified construction can be put, attention is specifically invited to Fig. 1. In this setup, use is made of a delivery pipe or the like 62, which carries the fluid from the machine tool table to the sump or tank 63. Instead of allowing all of the fluid flowing through said delivery pipe 62 to enter the tank 63, a certain proportion thereof is diverted, by the funnel shaped member 64, to the supply pipe 6|, to the under side of the impeller; while the remainder of the fluid passes through apertures 65 in the funnel shaped member 64, to the sump or tank 63, and is supplied to the upper side of the impeller,

through the aperture or opening 5! in the mount- Projecting below the flange 31, the housing [2 has a sleeve-like extension 39, open at one side, as at 40. At the end of the sleeve 39 is a flange 4|, having an enlarged central aperture 42. The flange 4i forms the upper side of the impeller chamber 43, formed within the pump housing.

The pump Hv includes a pump housing 44, having at its upper side a flange 45, to which the flange 31 of the extension housing is secured. Within the housing 44 is a pair of spaced webs 45 and 41, which, together with the flange 4|, completes the impeller chamber 43. The webs 46 and 41 terminate at one side of thehousing in the discharge pipe 48. The base 49 of the pump housing, and the flange 45, each terminate in .an attaching flange 5i), which is provided therethrough with an opening 5|.

As seen in Fig. 3, the discharge conduit or pipe 48 projects through the opening 5| in the attaching flange 56', and the opening 5| provides, on each side of the discharge conduit 48, a passage to the interior of the pump housing 44. These passages 5| form supple ducts or ports for the enlarged aperture 42 in the flange 4| for supplying the upper side of the impeller chamber 43 with liquid or fluid to be circulated by the pump.

- The impeller chamber 43, see- Fig. 3, isof the usual construction, starting with substantially nothing, as at the point 53, and gradually enlarging until the discharge conduit or pipe 43 is reached. Any suitable or desirable impeller may be utilized for circulating the liquid or fluid. As shown in the drawing the impeller illustrated comprises a hub 54 secured to a reduced portion 55 at the end of the shaft 26.

Projecting radially from the center of the hub is a disc 56, having secured to its upper and lower surfaces respectively impeller blades 57 and 58. The upper blades 51 of course receive liquid or fluid through the aperture 42 in the flange M, while the blades 56 receive the liquid or fluid th-rough'th'e aperture 52 in the web-41.

The lower side of the impeller and the aperture or eye 52 are supplied with fluid or liquid from a source other than through the passages 51, as clearly illustrated in Figs. 1 and 4. As shown in these views, the space or passage 59, between the web 41 and base 49 of the pump housing, terminates in a threaded aperture 60, towhich the supplementary supply pipe 5! is connected, while the discharge conduit or pipe 48 isvertically spaced with respect thereto. this construction, the lower side of the impeller may be supplied from a point, remote-from the point of supply of I the upper side of the impeller. As anexample of the use to which this ing flange.

By this construction also, a vacuum or suction is placed on the delivery pipe 62, thereby causing a more rapid emptying of this pipe and a quicker drainage of the fluid from the machine tool table. It should also be noted that, with this construction, the lower side of the pump may be supplied from a point below the pump by turning the supply pipe 5! to this lower point, and mounting a foot valve on said supply pipe to avoid the loss of pump priming.

From the foregoing, it will now be appreciated that there has been provided a pump housing in which the pump is supplied with fluid or liquid through openings provided in the mounting flange 55, as is usual construction. At the same time, the pump is provided with a discharge conduit or pipe extending through the same mounting flange 53, instead of having this discharge opening radially spaced from the intake opening, as is usual construction, and which is illustrated in copending application, Serial No. 81,043, which was filed on May 21, 1936 now Patent No. 2,179,730.

By the construction above referred to, the pump as a whole may be secured by bolts or the like 66' extending through openings 6'! in the mounting flange 53 to a sump, tank or machine tool base in which the supply tank is formed and will receive the fluid, liquid or the like to be circulated through an aperture in the wall of the sump, tank or machine tool, registering with the supply aperture 5i in the mounting flange 5%, as illustrated for example in Fig. 1. Projecting into said sump, tank or machine tool base, through the same opening therein, is the discharge pipe or conduit 48, and to which the discharge pipe extension 68 is connected. From this it will-be seen, particularly in the case of a machine tool structure, that the discharge pipe may be concealed within the machine tool or may even be formed integral therewith and connected with the discharge conduit 48. In this way the said discharge pipe for the circulating pump will be out of the way and will not interfere with control mechanisms or the like that are usually disposed externally of the machine tool.

It is believed that the foregoing description fully discloses the invention, and provides a structure which will accomplish the advantagesand objects initially set forth.

What is claimed is: I

L In a circulating pump of the class described, a pump housing casting including an integral mounting flange forming the sole support for the pump and from which projects the encircling body portion of the housing, which in turn has integral therewith and interiorly thereof spaced flanges to form an impeller discharge passage, means associatedwith said castmg, and removably secured thereto, in alignment with one of the impeller discharge passage flanges and outer edges of the encircling body portion for forming an impeller chamber and for closing the side of the pump housing, an impeller within said chamber, the impeller chamber sides having formed therethrough supply ports for supplying the interior of the impeller chamber and the impeller and said ports being in communication with an intake passage formed through the mounting flange, said impeller chamber discharge passage flanges beyond the impeller chamber being connected to form a discharge pipe and passing through the intake port, and a partition extending from each side of the discharge pipe dividing the intake passage into two such passages for respectively supplying the upper and lower sides of the impeller.

2. In a circulating pump of the class described, a pump housing casting including an integral mounting flange forming the sole support for the pump and from which projects the encircling body portion of the housing, which in turn has integral therewith and interiorly thereof spaced flanges to form an impeller discharge passage, means associated with said casting, and removably secured thereto, in alignment with one of the impeller discharge passage flanges and outer edges of the encircling body portion for forming an impeller chamber and for closing the side of the pump housing, an impeller within said chamber, the impeller chamber sides having formed therethrough supply ports for supplying the interior of the impeller chamber and the impeller and said ports being in communication with an intake passage formed through the mounting flange, said impeller chamber discharge passage flanges beyond the impeller chamber being connected to form a discharge pipe and passing through the intake port, a partition extending from each side of the discharge pipe dividing the intake passage into two such passages for respectively supplying the upper and lower sides of the impeller, a drain pipe connected to one of said supply passages whereby a suction is placed on such drain pipe by the impeller for more rapidly exhausting said drain pipe, a driving shaft connected with the impeller and projecting from one side thereof, and driving means for said shaft supported by the aforesaid means which forms one side of the impeller chamber and pump housing.

EDWARD J. RUTHMAN.

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