US2818025A

US2818025A - Single vane pump

Info

Publication number: US2818025A
Application number: US486814A
Authority: US
Inventors: Harold W Hein
Original assignee: International Harverster Corp
Current assignee: Navistar Inc
Priority date: 1955-02-08
Filing date: 1955-02-08
Publication date: 1957-12-31
Anticipated expiration: 1974-12-31

Description

Dec. 31, 1957 F/G/B H. w. HEIN' SINGLE VANE PUMP Filed Feb. a, 1955 I //vv/v 70/? HA HOLD n4 HEl/V ATfiR/VEY United States.

SINGLE VANE PUMP Harold W. Hein, Chicago, Ill., assignor to International Harvester Company, a corporation of New Jersey Application February 8, 1955, Serial No. 486,814

7 Claims. (Cl. 103-136) This invention relates to fluid pumps. More specifically, this invention relates to a vane type of fluid pump having a single vane. It is a primary object of this invention to provide an improved and simplified vane type fluid pump.

A more specific object of the invention is to provide an improved and single vane pump having certain valve passages provided in the pump rotor and cooperating with certain passages and valves provided in cylindrical valve'members disposed on opposite sides of said rotor.

A still further object of this invention is to provide a vane type of pump having a single vane adapted to provide increased pumping efliciency and reduce maintenance time, by the utilization of simplified inlet and outlet valves formed in a pump rotor and adjacent portions of a pump casing.

These and further objects will become more readily apparent from a reading of the specification when examined in connection with the accompanying sheet of drawing.

In the drawing:

Figure 1 is a cross-sectional view through a single vane fluid pump;

Figure 2 is a cross-sectional view through a single vane pump taken substantially along the line 22 of Figure 1;

Figure 3 is a cross-sectional view substantially taken along the line 33 of Figure 1;

Figure 4 is a cross-sectional view taken along the line 4-4 of Figure 1;

Figure 5 is a cross-sectional view taken on the line 55 of Figure 1; and

Figure 6 is a cross-sectional view through an inletvalve of a fluid pump taken along the line 6-6 of Figure 1.

A single vane fluid pump is generally designated by the reference character 10. The pump 10 comprises a casing 11 having a cylindrical casing portion 12. Opposite ends of the cylindrical casing portion 12 are connected to end casing portions or valve housings 13 and 14. The valve housings 13 and 14 are inter-changeable, this feature being particularly important from the standpoint of simplification, cost, and maintenance. The valve housings 13 and 14 are suitably connected together and to the casing portion 12 by means of a plurality of bolts 15. Each of the valve housings 13 and 14 is provided with a base portion 16, the said base portions 16 cooperating to provide a substantial support for the pump 10.

The casing portion 12 defines an annular chamber 17 in which a rotor 18 is positioned. As clearly shown in the drawings, the rotor 18 is positioned off-center or eccentrically with respect to the axis of the chamber 17, this feature being conventional in vane type pumps. The rotor 18 is provided with a recess 19 in which a vane 20 is slidably or reciprocally positioned. The vane 20 may be made of graphite or other suitable material, the same being freely reciprocal in the recess 19 so that the outer edge of the vane 20 may sweep the interior surface of the casing portion 12 in conventional manner.

ice

. 2 A cylindrical inlet valve 21 projects axially outwardl from one side of the rotor 18. Likewise, a cylindrical outlet valve 22 projects outwardly from the opposite side of the rotor 18. The inlet and

outlet valves

21 and 22 are respectively suitably journalled in

bores

23 and 24 provided in the casing portions 13 and 14. A shaft 25 is connected to the inlet valve member 21, the said shaft being suitably journalled in a bearing 26 and being connected to a suitable source of power (not shown). A stub shaft 27 is connected to the outlet valve 22 and is suitably journalled in a bearing 28carried on the housing 14.

The housing 13 is provided with a semi-cylindrical inlet passage 29, the said passage being separated at its ends by a projection 30 forming part of the housing 13, the said projection 30 having its innermost portion in engagement with the inlet valve member 21. The inlet passage 29 is in communication with an inlet connection 31. An inlet slot 32 is provided on the face of the rotor 18 immediately adjacent the vane 20. The inlet slot 32 is in communication with a bore 33 extending laterally with respect to the axis of the rotor 18. A bore 34 is in communication with the bore 33, the said bore 34 extending axially within the rotor 18. The bore 34 is in communication with an inlet passage 35 formed in the valve member 21, the said inlet passage 35 being in communication with the semi-cylindrical passage 29.

A semi-cylindrical outlet passage 36 is formed in the outlet valve 22. By the term semi-cylindrical in connection with the passages is meant substantially cylin- 'drical, or less than cylindrical. The passage 36 has its ends terminating at a projection 37 formed in the casing portion 14, the said projection 37 having a surface in engagement with the outlet valve 22. Thus, as best shown in Figures 2 and 6, the

projections

30 and 37 are in relatively opposed relation. An outlet connection 38 is formed on the casing portion 14. An outlet slot 39 is formed in the rotor 18 immediately adjacent the vane 20. The outlet slot 39 is in communication with a bore 40 extending laterally within the rotor 18. The bore 40 is in communication with a bore 41 extending axially in the rotor 18, the said bore 41 also being in communication with an outlet passage 42 formed in the valve member 22. The passage 42 is in communication with the semi-cylindrical outlet passage 36, as best shown in Figures 1 and 2.

In operation, the rotor 18 is driven in a clockwise direction. Since the

valves

21 and 22 are identical, however, the rotor can be driven in clockwise or counterclockwise direction depending which of the connections 31 and 38 are designated as the inlet and outlet connec-.

tions. As the rotor 18 moves in clockwise manner fluid is drawn through the inlet connection 31 into the semicylindrical inlet passage 29 through the inlet passage 35 and enters the chamber 17 through the slot 32. Simultaneously, during the rotation, the vane 20 is elfective to discharge fluid within the chamber 17 through the slot 39, bores 40, 41 and passage 42 into the outlet passage 36 and from there out through the outlet connection 38. It can be seen that when the vane 20, during rotation, is in its completely retracted position within the slot 19, the said vane 28 is in what may be called a twelve oclock position. In this position the inlet passage 35 is covered by means of the projection 30 and at this point no fluid flows through the chamber 17 from the inlet connection 31. Likewise, in the twelve oclock position of the vane 20 the bore 41 is covered by the projection 37 and at this point no discharge of fluid from the chamber 17 takes place since the vane is in a nonfunction point or position. As the vane, however, is

moved in clockwise manner from the twelve oclock' position the passages 35 and 42 are moved away with re- 3 spect to the

projections

30 and 37 so that the pumping action again takes place.

Thus it can be seen that an improved vane pump has been disclosed, the pump being simple in design and op eration with both of the outlet valve and inlet valve members being interchangeable in maintenance. Furthermore a single vane is provided, this provision greatly reducing the replacement of. vanes during operation. A simplified and yet very effective pump is thus provided. It is therefore apparent that the objects. of the invention have been fully achieved butthat, changes and modifications may be made without departing from the spirit of the invention as disclosed or, the scope thereof as defined. in the appended claims.

What, is claimed is:

1. A vane pump comprising a casing having an annular, chamber, first and second eccentric'shafts sup- Po ed for. rotation on said casing, said shafts being positioned eccentrically with respect to the axis of said annular chamber, a rotor connected to and positioned between said shafts and being positioned for. rotation within said chamber, said. rotor. having a slot extending laterally with respect to the axis of said rotor, a pump vane reciprocally Positioned within said slot, a cylindrical, inlet valve on said first. shaft on one side of said rotor, a cylindrical outlet valve on said second. shaft on the opposite side of saidrotor, a semi-circnlarinlet pas.- sage on said casing concentric with saidinlet valve, said casing having a first projectingportion disposed. between the. ends of said semi-circular passage and projecting inwardly in engagement withsaid inlet valve, a semi-circuoutlet passage on said easing,v concentric with said outlet valve, a second projecting. portion disposedbetween the ends of said outlet. passage, said second projecting pprtion being disposed opposite to said firstprojecting portion and engaging said outlet. valve, said rotor having inlet and outlet slots disposed on opposite sides of said vane and, adjacent thereto, an inlet bore in said inlet valve communicating with saidinlet passage and saidinlet slot, and an outlet bore in said outlet valve communicating with said outlet. passage and said outlet slot, said inlet and outlet bore being disposed in laterally opposed relation, said inlet slot providing for the intake of fluid into said chamber and. said. outlet slot exhaustingfluid from said chamber, during the rotation of aid, t r- 2. A vane pump comprising a casing having an an nular chamber, first and second. concentric shafts supported for rotation on said casing, said. shafts being positioned eccentrically with respect to theaxis ofrsaidannular chamber, a rotor connected. to andpositioned. between said shafts and being positioned for rotation within said chamber, said rotor having a slot extendinglaterally with respect to the axis of said rotor, a pump vane reeiprocallvpositioned within saidslot, a cylindrical inlet valve on said first shaft on one side of said rotor, a cylindrical outlet valve on said. second shaft on the opposite side of said rotor, a semi-circular inlet passage on said casing concentric with said inlet, valve, a semicircular outlet passage on, said casing concentric with said outlet valve, said rotor, having inlet and outlet slots disposed on opposite sides of said vane and adjacent thereto, an inlet bore line in saidinlet valve communicating with saidinlet passage andsaid inletslot, and an outlet borein said outlet valve communicating with said outlet passage and, said outlet slot, saidinlet and outlet, bores being disposed inlaterally opposed relation, said-inletslot providing for the intake of fluid -into. said chamb r. and said outlet slot. exhausting fluid from said chamberduring the rotation of saidrotor.

3, A vane pump comprising a casing having an annularchamber, first and second concentric shafts supported for, rotation on said casing, .saidshafts being positioned eccentrically with respect to the axis of said annular chamber, a rotor integralwith said shafts and being positioned for rotation within said chamber, said rotor having a slot, a pump vane reciprocally positioned in said slot, a cylindrical inlet valve on said first shaft on one side of said rotor, a cylindrical outlet valve on said second shaft on the opposite side of said rotor, a semi-circular inlet passage on said casing concentric with said inlet valve, a semi-circular outlet passage on said casing concentric with said outlet valve, said rotor having inlet and outlet slots disposed on opposite sides of said vane and adjacent thereto, an inlet bore in said inlet valve communicating with said inlet passage and said inlet slot, and an outlet bore in said outlet valve communicating with said outlet passage and said outlet slot, said inlet and outlet bores being disposed in laterally opposed relation, said inlet slot providing for the intake of fluid into said chamber and said outlet slot exhausting fluid from said chamber during the rotation of said rotor.

4. A vane pump comprising a casing having an annular chamber, first and second concentric shafts supported for rotation on said casing, said shafts being positioned 'eccentricallv with respect to the axis of said annular chamber, a rotor connected to and between said shafts and being positioned for rotation within said chamber, said rotor having a pump vane reciprocally positioned relative to said rotor, a cylindrical inlet valve on said shaft on one side of said rotor, a cylindrical outlet valve on said shaft on the opposite side of said rotor, a. semi-circular inlet passage on said casing concentric with said inlet valve, a semi-circular outlet passage on said casing concentric with said outlet valve, said rotor having inlet and outlet slots disposed on opposite sides of said vane and. adjacent thereto, an inlet bore in said inlet valve. communicating with said inlet passage and said inlet slot, and an outlet bore in said outlet valve communicating with said outlet passage and. said outlet slot, said inlet and outlet bores being disposed in laterally opposed relation, said inlet slot providing for the intake.

of fluid into said. chamber and saidoutlet slot exhausting fluid from said chambers during the rotation of said rotor.

5. A vane pump comprising a casing having an annular chamber, first and second. concentric, shafts journalled on saidv casing, said shafts each havingaportion projecting.

axially outwardly from opposite sides of said chamber, said shafts being ,positioned off-center with respect to the axis of said chamber, a rotor connected to and between said; shafts forrotation within said ehamebr, a vane connected to said rotor for rotation therewith, said vane being reciprocally positioned on said rotor for relative radial movement with respect to the rotor axis, an inlet valve on said first. shaft, an outlet valve on the second shaft, said casing having a semi-circular inlet passage disposed about and concentric with said inlet valve, an inlet connection in communication with said inlet passage, a semi-circular outlet passage in said casing sur rounding said outlet valve and concentric therewith, an outlet. connection in communication with said outlet connection, an inlet bore in said rotor, said inlet valve providing communication of said inlet bore with said'inlet passage, said inlet bore having an opening disposed on one side of, and adjacent said vane and-being in communication with said chamber, an outletbore in said rotor, said outlet valve providing communication with said outlet bore and said outlet passage, said outlet bore having an opening disposed adjacent to and on the opposite side of said vane for communicating with said chamber whereby during rotation of'said rotor fluid in said chamber is exhausted through said outlet bore and to said outlet connection andfluid-is directed through said;inlet connection andsaid inlet bore to said chamber.

6. Avane pump comprising a casing having an annular chamber, first and second shafts journalled on said casing, said shafts each having a portion projecting axially outwardly from opposite sides of saidchamber, said shafts being positioned-off-center with respect to the of said chamber, a rotor connected to said shafts for rotation within said chamber, a vane connected to said rotor for rotation therewith, said vane being reciprocally positioned on said rotor for relative radial movement with respect to the rotor axis, an inlet valve on said first shaft, an outlet valve on the second shaft said casing having an inlet passage disposed about and concentric with said inlet valve, an outlet passage in said casing sur rounding said outlet valve and concentric therewith, an inlet bore in said rotor, said inlet valve providing communication with said inlet bore and said inlet passage, said inlet bore having an opening disposed on one side of and adjacent said vane and being in communication with said chamber, an outlet bore in said rotor, said outlet valve providing communication with said outlet passage and said outlet bore, said outlet bore having an opening disposed adjacent to and on the opposite side of said vane for communicating with said chamber whereby during rotation of said rotor fluid in said chamber is exhausted through said outlet bore and fluid is directed through said inlet connection to said chamber.

7. A vane pump comprising a casing having an annular chamber, first and second shafts journalled on said casing, said shafts having each a portion projecting axially outwardly from opposite sides of said chamber, said shafts being positioned oiT-center with respect to the axis of said chamber, a rotor connected to said shafts for rotation within said chamber, a vane connected to said rotor for rotation therewith, said vane being reciprocally positioned on said rotor for relative radial movement with respect to the rotor axis, an inlet valve means on said first shaft, an outlet valve means on the second shaft, said casing having an inlet passage in communication with said inlet valve means, outlet passage in said casing in communication with said outlet valve means, an inlet bore in said rotor in communication with inlet valve means, said inlet bore having an opening disposed on one side of and adjacent said vane and being in comunication with said chamber, an outlet bore in said rotor in communication with said outlet valve means, said outlet bore having an opening disposed adjacent to and on the opposite side of said vane for communicating with said chamber whereby during rotation of said rotor fluid in said chamber is exhausted through said outlet bore and fluid is directed through said inlet connection to said chamber.

References Cited in the file of this patent UNITED STATES PATENTS 2,462,732 Dusevoir Feb. 22, 1949 FOREIGN PATENTS 66,066 Denmark Dec. 1, 1947 883,670 Germany July 20, 1953