US2417568A - Rotary vane type pump - Google Patents

Description

March 18, 1947. G. E. RElLlcH ROTARY VANE TYPE PUMP Filed April 11, 1945 l5 l L IN V EN TOR.

Arron/sy 60577411 E. elLlcH Patented Mar. 18, 1947 UNITED STATES PATENT OFFICE ROTARY VANE TYPE PUMP Gustave E. Reilich, Ridgewood, Long Island, N. Y.

Application April 11, 1945, Serial No. 587,654

1 Claim. (Cl. 103-136) This invention relates to new and useful improvements in a rotary vane type pump, fluid motor or compressor. For simplifying this specication the invention will be described applied to a pump, but it applies equally to a fluid motor, and gas or air compressors Without any variation in the invention proper.` e

The dominating object of this invention is the construction of a rotary vane type pump in which the rotor is hydraulically balanced and in which the vanes are positively moved during the operation of the pump. Heretofore, rotary vane pumps have been constructed in which the rotors were hydraulically balanced, but because of their construction it was impossible to give the vanes positive movements. It became necessary to depend on centrifugal force or springs, or other mechanisms in which the vanes do not necessarily have to move as they are intended to move. Pumps have been constructed inwhich the vanes have positive movements, but in these types of pumps the rotors were not hydraulically balanced. Because of their designs it was physically impossible t hydraulically balance their rotors.

A positive vane movement is necessary for all heavy and viscous liquids. A hydraulically balanced rotor is desirable to reduce the wear in the bearings and to assure long trouble free life of the pump. I

Structurally, the new and improved rotary vane type pump is characterized by a cylinder having consecutive groups of internal sections, each of these sections consisting of a small diameter section continuing into an increasing cam shaped section continuing into a, largeA diameter section continuing into a decreasing cam shaped section. It is proposed that these groups be arranged so that the large diameter sections are diametrically opposite the small diameter sections and the increasing cam shaped sections are diametrically opposite the decreasing cam shaped sections. With this arrangement the vanes may be arranged in diametricallyopposite pairs, and these pairs may be moved simultaneously in one direction, or the other direction radially of the rotor of the pump. Moreover, with the new and areas will be correspondingly spaced, and the rotor will be hydraulically'balanced. To those skilled in the art it will be apparent that pumps may be constructed embodying the principles of this invention and containing more than three of lthese pockets. For example, it is a simple matter toconstruct -a pump, in accordance with this invention, which will have five or seven, or more pockets equally spaced from each other around the rotor.

In the specific embodiment to be disclosed in this specification, the vanes are moved with rings. However, this is only by way of illustration Since other positive movements of the vanes may be obtained in other Ways.

Still further the invention proposes the construction of a rotary vane type pump, in accordance with this invention, which is exceptionally durable, efficient, and which may be manufactured and sold at a low cost.

For further comprehension of the invention, and of the objects and advantages thereof, reference will be had to the accompanying drawing and description, and to the appended claim in which the various novel features of the invention are more particularly set forth.

In the accompanying drawing forming a ma-- terial part of this disclosure:

Fig. 1 is a fragmentary front elevational view of a rotary vane type pump constructed in accordance with this invention.

Fig. 2 is an enlarged vertical sectional view taken on the line 2-2 of Fig. 1.

Fig. 3 is a sectional view .taken on the line 3-3 of Fig. 2. l

Fig. 4 is a sectional view taken on the line 4--4 of Fig. 3.

improved construction it will be found that the pressure areas of the rotor will hydraulically balance the rotor.

One specific embodiment of the new and improved rotary vane type pump will be given in thisspecication, though other embodiments will readily beapparent to those skilled in the art. The specific embodiment shown has three of the large diameter sections equally spaced from each a other around the circumference of the rotor.

These large diameter sections'comprise the pockets for the fluid being pumped. Since they are equally spaced from each other the pressure The new and improved rotary vane type pump, inv accordance with this invention, includes a cylinder I0 having consecutive groups of internal v sections, each group consisting of a small diameter section I I continuing into an increasing cam shaped section I2 continuing into a large diameter section I3, continuing into a decreasing cam shaped section I4. In the particular design of cylinder illustrated there are three of these repeating groups arranged in succession around the interior of the cylinder. It shouldbe noticed that these groups are so arranged that the large diameter sections I3 are diametrically opposite the small diameter sections Il, and the increasing cam shaped sections I2 .are diametrically opposite the decreasing cam shaped sections I4. This arrangement can be obtained with all odd numbers of repeating groups, such as three, ve, seven, etc. The cylinder Ill is in the nature of a liner which is flxedly mounted within a housing I5 of the pump.

The'ends of thehousing I5 are provided with the usual housing heads I 6. A shaft Il is rotatwelve vanes I9.

-first and last vanes I9 during one instant of r0- tation of said rotor I8, on the extreme ends of each of said groups of said internal sections, and with the first and last vanes of each group being common to adjacent groups. In the partie.. ular'design of pump shown, with three of the large diameter sections I3 used, we would require Of course, a larger number of vanes may be used without affecting the eilicient operation of the pump, but a smaller number would not be satisfactory as the pump would work very inefilciently because leakage will take place between the inlet and outlet ports, as will be more clearly understood as this specification proceeds.

The vanes I9 are arranged in diametrically opposite pairs to facilitate moving them in a positive fashion. The vanes I9 are associated with means for moving them in unison and in the same direction. This means is illustrated ascomprising two groups of rings 22, though one or more groups may be used. The rings 22 are contained in recesses 23 formed in the ends of the rotor l I8. For small pump sizes, one group of rings 22 may be used at the center of the rotor. Each ring 22, in the particular design of the pump illustrated, is used to move four of the vanes I9. This may be seen by a close inspection of Fig. 2.A It should be noted that each ring 22 is engaging and is capable of moving four of the vanes inlet 28 to reach the inlet ports 28. The rotor I8 is driven. The fluid will be moved by the vanes I9 to the outlet ports 32. During this movement I9 which are spaced 90 from each other. The

vanes I9 are formed with cutout portions 25, where necessary, so that each of the rings 22 used to move four of the vanes I9 will not engage or interfere with the movements of the remaining vanes I9. The construction is such that during rotation of the rotor I8 each diametrically opposite pair ofvanes I9 will be moved, i'lrst in one direction and then in the other direction, and the vanes I9 will be following the internal contour of the cylinder I0.

The housing I5 is provided with an inlet 28 which connects with a-passage 21 terminating in inlet ports 28 extending substantially the entire circumferential lengths of the increasing cam Further details of the pump will not be given in this specification as they form no part of this invention. However, it should be understood that the pump requires stuffing boxes, and packing, a lubricating system, 'and all the other essential parts of pumps.

lThe operation of the new and improved rotary vane type pump may be understood from 4the following:

The fluid to be pumped is connected with the the fluid, which is being pumped, will be cut 0E from the inlet ports and will be forced out of the outlet ports. This produces the necessary pumping action. The vanes I9 will follow the contour of the interior of the cylinder I0 during the operation of the pump. The vanes I9 are positively moved by the rings 22. For this reason they cannot possibly stick since they are being l forced inwards and outwards, as required. The

outer edges of the vanes I9 will be forced to follow the internal contour of the cylinder I0, and the rings 22 will transfer the forcing movements from the vanes I9 Abeing forced inwards to those vanes I9 which are required to move outwards. The vanes I9 are moving in opposite pairs, first in one direction and then in the other direction.

A dominating feature of the new and improved rotary vane type pump resides in the fact that the pockets of the pump, formed by the large diameter' sections I3 are equally' spaced from each other so as to hydraulically balance the rotor I8. Another important feature is that the vanes I9 are being positively moved while the rotor I8 is hydraulically balanced.

While I have illustrated and described the pre' ferred embodiments of my invention, it is to be understood that I do not limit myself to the precise constructions herein disclosed and the right is reserved to all changes and modifications coming withinl the scope of the invention as defined in the appended claim.

Having thus described my invention, what I claim as new and desire to secure by United States Letters Patent is:

In a rotary vane type device of the class described having a cylinder formed with three consecutive groups oi' internal sections, each group consisting of a small diameter section continuing into an increasing cam .shaped section continuing into a large diameter section continuing into a decreasing cam shaped s ection and said groups being arranged so that said large diameter sections are diametrically opposite said small diameter sections, a rotor within said cylinder of a'diameter slightly smaller than the diameter of said small diameter sections, twelve vanes radially slidably mounted in said rotor and spaced substantially equal distances from each other and arranged in diametrically opposite pairs, and

means for moving diametrically opposite vanes simultaneously in unison in the same direction comprising three rings for each end of said rotor and housed in recesses formed in the end of said rotor and each ring engaging the inner edges of REFERENCES CITED 'The following references are of record in the file of this patent:

FOREIGN PATENTS Number Country Date 19,119 British 1911 22,696 Australian 1935 293,869 British 1928

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