US1658524A

US1658524A - Rotary pump

Info

Publication number: US1658524A
Application number: US8259A
Authority: US
Inventors: John W Gurley
Original assignee: Individual
Current assignee: Individual
Priority date: 1925-02-10
Filing date: 1925-02-10
Publication date: 1928-02-07
Anticipated expiration: 1945-02-07

Description

. FEB, 7, 1928;

J; W. GURLEY ROTARY PUMP iled Feb. 10. 1925 Patented Feb. 7; 1 928 NITED STATES;

' JOHN w. Gunner, or mnIANAroLIs, mnIAN-n.

Application filegl February 10,-"1925. Serial 110. 8,259.

' It is the object of my inventionto produce a pump of the type in which a rotor provided with a plurality of retractible blades rotates within an eccentricchamber so that I spaces between two adjacent blades, the rotor. and the chamber walls alternatelyrincrease and diminish in size- Specific objects of my invention areto lessen the wear and friction loss in such a pump and to provide .0 means for preventing scoring of the cham ber wallor rotor surface owing to'grit or other foreign substances which enter the pump. A further object of'my invention 1s to increase the capacity of such a pump by 6 using the reciprocation of the blades in their slots to aid in the pumping actions I accomplish the above objects by providing in the exterior face of each blade a rocking shoe which engaging the inner surface.

of the pump chamber and which is provided in its outerface with-arecess which has two openin s, oneof such openings being1n-the outer ace of'the blade to provide communication between the recess and thespace ahead'of such blade in the direction of rotor rotation, and the other of which openings communicates through an opening in the blade with the space behind-suchblade.

Ahead of each blade in the direction of ro- 0 tor rotation I'prov'ide in the surface of the rotor a, longitudinally extending groove in WhiOh'Wlll be accumulated any grlt or other foreign substance which may enter the,

pump. I l The accompanying drawing illustrates my invention: Fig. 1 is a longitudinal central section of the pump on the ine 11 of Fig- 2; Fig. 2 is a transverse section of the pump on the line 22 of Fig. 1: Fig. 3 is a perspective view of one of the blade-shoes used;

and Fig. 4 is a perspective view of one-of the reciprocating blades.-

My pump comprises a casing provided with an inlet opening 11, an outlet open- 5 ing 12, anda longitudinally extending cylindrical chamber 13. Mounted on each end of the casin 10 is an end late'14, preferably provi edwitha bear 1ng ..boss to rovlde a bearing forthe rotorshaft 16. 0 The rotor shaft 16 extends longitudinally of the casing and passes through the chamber 13, but is not co-axial with such chamber. On its outer end, the shaft 16 may be provided with-a pulley-17 for the purpose of driving it. A passage 20, located on the wall of the cham er 13, serves to connect the inlet opening 11 with a recess 21 located in one or both of the end plates 14. These recesses 21 extend toward the center of the chamber 13 6.0 and serve to connect the chamber 13 with the inlet opening 11 through the longitudinally extending-passage 20. A second longitudinally extending passage 22', located in the wall of the casing, preferably opposite the passage 20, communicates with a recess 23 in one or both of the-end plates 14. The

recess or recesses 23 are similar to the recess or recesses 21 and serve to connect the chamber 13 with the outlet opening 12 through the passage 22.

Within the chamber- 13, there is rigidly mounted on the shaft 16 a cylindrical rotor 25-. In the surface of the rotor 25 there are a pluralityof grooves in each of which there 7 is slidably mounted a blade 26. Preferably,

these grooves are arranged in pairs with the grooves of each pair diametrically opposite each other. Extending between opposite grooves is pne or more holes for the reception of pins 27 rigidly attached to each blade 26. The pins 2. are of such a length thatloppositepins abut each other when the blades to which they are attached most closely approach each other.

The outer surface of each of the blades 20 is provided with a groove 28 for'the reception of a rockin shoe 30, the inner surface of such shoe eing shaped to fit the cove 28, and the outer surface of such shoe 90 eing'a portion of a cylindrical surface of a radius equal'to that of the chamber 13. Thus, the outer surface of each shoe 30 will always be firmly seated against the wall of provided with a notch 33, in line with the opening 32. From the bottom of each recess 31 there extends through the shoe a hole 34 which communicates with a hole 35 passing through the associated blade 26.

In the surface of the rotor, ahead of each blade, I provide a longitudinally extending groove 38. Grit or foreign substances which h enter the pump tend to become wedged between the rotor and the wall of the chamber 13 at the point where .the rotor most closely approaches such wall. The grooves 38 serve as pockets in which such grit may be deposited and thus removed from the surface of the rotor or thewall of the chamber. The removal in this fashion 01 any grit that may enter the pump prevents scoring the surfaces of the rotor and chamber wall.

The blades 26 and shoes 30 serve to divide into four partsthe space between the rotor and the walls of the chamber 13. With the rotor rotating in-a clockwise direction (Fig. 2) the spaces between adjacent blades on the right-hand side of the rotor will be expanding and those on the left-hand side of the rotor will be contracting. Thus, fluid will be drawn in through the inlet 0 ening 11, passage 20, and recesses 21 to ll the expanding spaces on the right side of the rotor, and this fluid will be expelled by the contraction of such spaces when the reach the left-hand side of the pump. his is the manner in which all pumps of this type operate. By my improved construction, however, the reciprocation of the blades themselves is used to increase the capacity of the pump, for the space between each blade and the bottom of the groove in which it is received is expandin when such space, is in communication wit the recesses 21 and is contracting when such space communicates with the recess 23. Thus each blade operates in the manner of the, piston of a reciprocating pump. The pressure between each blade and the bottom of its groove is communicated through the

holes

34 and 35 to the recesses 30 in the face of the blade shoe, and the pressure in the recess 31 serves to partially balance that beneath each blade. Thus, the force with which each blade shoe is ressed against the wall of the chamber 13 1s materially reduced and wearing of the shoe'surface and friction loss is correspondingly diminished. The

holes

34 and 35 and the o ening 32 provide a passage for the fluid orced out from the space between each blade and the bottom of its groove.

I claim as my invention 1. In a rotary pump having a shell, a rotor eccentrically mounted in said shell, retractible blades carried by said rotor; wearing shoes mounted in said blades and engaging said shell, said wearing shoes having recesses in their shell-engaging faces, each of said recesses communicating with the space be-' rotor eccentrical tween said rotor and said shell and immediately ahead of said shoe in the direction of rotation of said rotor. I

2. In a rotary pump having a shell, a

y mounted in said shell, retractible elements carried by said rotor and engaging said shell, said retractible elements aving recesses in their shell-engaging faces, each of said recesses communicatin with the space between said shell and said rotor and immediately ahead of said element in the direction of rotor rotation.

3. A rotar pump, comprising a shell, a rotor rotatab y mounted in said shell, a plurality of retractible elements mounted on said rotor and engaging said shell, said shell being arranged so that the spaces between it, said rotor, and adjacent retractible elements will alternately increase and decrease in size as said rotor is rotated, an inlet open ing and an outlet opening for said shell, each of said retractible elements having a recess in its shell-engaging face, each of said recesses communicating with the space between said shell and said rotor and immediately ahead of said element in the direction of rotor rotation.

4. A rotary pump, comprising a shell, a rotor rotatably mounted in said shell, a plu-. rality of retractible blades mounted on said rotor and engaging said shell, said shell being arranged so that the spaces between it, said rotor, and adjacent retractible blades will alternately increase and decrease in size as said rotor is rotated, an inlet opening and an'outletopening for said shell, a wearing shoe mounted in each of said blades and engaging said shell, each of said wearing shoes having a recess in its shell-engaging face, each of said recesses communicating with the space between said rotor and sai shell and. immediately ahead of said shoe in the direction of rotation of said rotor.

5. A rota pump, comprising a shell having inlet-an outlet 0 emngs a rotor rotatab y mounted in said s ell an having a Inrah'ty of longitudinal grooves in its ace, shell-engaging elements mounted in said grooves for radial sliding therein, said shell being arranged so that said shell-engaging elements slide inwardly and outwardly in said grooves as said rotor is rotated, and a fluid passage through said shell-engagin element connecting the space between sue element and the bottomof its associated groove with the space between said rotor and said shell 'and immediately ahead of such element in the direction of rotor rotation.

6. A rotary pump, comprising a shell having inlet and outlet 0 enings in the ends thereof, a rotor rotate 17 mounted in said shell and havin a plurality of longitudinal grooves in its ace, shell-engaging elements mounted in said grooves for-radial sliding therein,--=said shell being arranged so that III said shell-engaging elements slide inwardly and outwardl in said grooves as said rotor. s rotated, and a fluid passage connecting the space between such element and the bottom of its associated groove with the space between said rotor and said shell and immediately ahead of such element in the direction of rotor rotation.

7. A rotary pump as set forth in claim 5 with the addition that said shell-engaging elements are provided with recesses in their shell-engaging faces, said fluid passage leading through said recesses.

8. A rotary pump, comprising a shell having inlet and outlet openings, a rotor rotatably mounted in said shell and having a plurality of longitudinal grooves in its face, shell-engaging elements mounted in said grooves for radial sliding therein, said shell being arranged so that said shell-engaging elements slide inwardly and outwardly in said grooves as said rotor is rotated, each of said shell-engaging elements having a recess in its shell-engaging face, and a fluid passage connecting said recess with the space between each shell-engaging element and the bottom of its associated groove.

9. A rotary pump, comprising a shell haw ing inlet and outlet openings, a rotor rotatably mounted in said shell and having a plurality of longitudinal grooves in its face, blades mounted in said grooves for radial sliding therein, said shell being arranged so that said blades slide inwardly and outwardly in said grooves as said rotor is rotated,

wearing shoes mounted in said blades and engaging said shell, each of said wearing shoes havin a recess in its shell-enga ing face, and a uid passage connecting sai recess with the space between its associated blade and the bottom of the groove in which said blade slides.

10. In a rotary pump having a shell, a rotor eccentrically mounted in said shell, retractible blades carried by said rotor; Wearing shoes mounted in said blades and engaging said shell, said wearing shoes having recesses in their shell-engaging faces.

11. A rotary pump, comprising a shell having inlet and outletopenings, a rotor rotatably mounted in said shell and having a plurality of longitudinal grooves in its face, shell-engaging elements mounted in said grooves for radial sliding therein, said shell being arranged so that said shell-engaging elements slide inwardly and outwardly in said grooves as said rotor is rotated, said inlet openin being arranged to communciate with 'eaci of said grooves through the end thereof as the shell-engaging element in such groove slides outwardly, and said outlet opening being arranged to communicate with each of said grooves through the end thereof as the associated shell-engaging element slides inwardly.

In witness whereof, I have hereunto set my hand at Indianapolis, Indiana, this 30th day of January, A. D.-one thousand nine hundred and twenty five.

JOHN W. GURLEY.