Liquid ring vacuum pump-compressor

Claim 2

A liquid ring pump including in combination a casing, a rotor shaft supported in said casing, a rotor supported by said rotor shaft, blades of said rotor having first and second opposite blade edges, a suction head, a radially projecting wall of said head with which said first blade edges are in sliding contact, wall ports of said wall, pump inlet means in communication with said wall ports, radially projecting shroud means integral with said second blade edges are in sliding contact, an axially disposed central member mounted radially inward of said rotor and about which said rotor can rotate, central member ports of said central member, pump discharge means in communication with said central member ports, a lobe of said casing, means for rotating said rotor whereby a fluid material is drawn from said pump inlet means, through said wall ports and within said casing and discharged through said central member ports and said pump discharge means and liquid inlet means whereby upon rotation of said rotor liquid is introduced into said casing within said lobe to be contacted by said fluid material upon passage therethrough and in which first angled guide vanes in said pump inlet means are provided in combination with second angled guide vanes in said pump discharge means so that fluid flow is directed at an angle less than 90 degrees from the surface of said wall and said central member respectively and in the direction of the communicating rotor blades.

Claim 3

A pump as set forth in claim 1 in which a ported sleeve is located on said central member between said central member and said rotor with the ports thereof in communication with the blades of the rotor.

Claim 4

A pump as set forth in claim 1 in which said rotor shaft is disposed in an internal chamber, and said liquid inlet means includes a conduit connected from said chamber to external liquid source, said chamber being isolated from said pump inlet and discharge means.

Claim 5

A liquid ring pump including in combination a casing, a rotor shaft supported in said casing, a rotor supported by said rotor shaft, blades of said rotor having first and second opposite blade edges, a suction head, a radially projecting wall of said head with which said first blade edges are in sliding contact, wall ports of said wall, pump inlet means in communication with said wall ports, radially projecting shroud means integral with said second blade edges are in sliding contact, an axially disposed central member mounted radially inward of said rotor and about which said rotor can rotate, central member ports of said central member, pump discharge means in communication with said central member ports, a lobe of said casing, means for rotating said rotor whereby a fluid material is drawn from said pump inlet means, through said wall ports and within said casing and discharged through said central member ports and said pump discharge means and liquid inlet means whereby upon rotation of said rotor liquid is introduced into said casing within said lobe to be contacted by said fluid material upon passage therethrough and in which said blades are contoured such that blade edges at areas in communication with said wall ports are directed forward in the direction of rotation so as to provide a pitch angle less than 90* at point of contact with incoming fluid material.

Claim 6

A liquid ring pump including in combination a casing, a rotor shaft supported in said casing, a rotor supported by said rotor shaft, blades of said rotor having first and second opposite blade edges, a suction head, a radially projecting wall of said head with which said first blade edges are in sliding contact, wall ports of said wall, pump inlet means in communication with said wall ports, radially projecting shroud means integral with said second blade edges are in sliding contact, an axially disposed central member mounted radially inward of said rotor and about which said rotor can rotate, central member ports of said central member, pump discharge means in communication with said central member ports, a lobe of said casing, means for rotating said rotor whereby a fluid material is drawn from said pump inlet means, through said wall ports and within said casing and discharged through said central member ports and said pump discharge means and liquid inlet means whereby upon rotation of said rotor liquid is introduced into said casing within said lobe to be contacted by said fluid material upon passage therethrough and in which said blades are contoured such that blade edges at areas in communication with said wall ports are directed forward in the direction of rotation so as to provide a pitch angle less than 90* at point of contact with incoming fluid material.

Claim 7

A liquid ring pump including in combination a casing, a rotor shaft supported in said casing, a rotor supported by said rotor shaft, blades of said rotor having first and second opposite blade edges, a suction head, a radially projecting wall of said head with which said first blade edges are in sliding contact, wall ports of said wall, pump inlet means in communication with said wall ports, radially projecting shroud means integral with said second blade edges are in sliding contact, an axially disposed central member mounted radially inward of said rotor and about which said rotor can rotate, central member ports of said central member, pump discharge means in communication with said central member ports, a lobe of said casing, means for rotating said rotor whereby a fluid material is drawn from said pump inlet means, through said wall ports and within said casing and discharged through said central member ports and said pump discharge means and liquid inlet means whereby upon rotation of said rotor liquid is introduced into said casing within said lobe to be contacted by said fluid material upon passage therethrough and in which said blades are contoured such that blade edges at areas in communication with said central member ports are directed back away from the direction of rotation so as to provide a discharge pitch angle less than 90* at a point of contact with discharged fluid material.

Claim 8

A liquid ring pump including in combination a casing, a rotor shaft supported in said casing, a rotor supported by said rotor shaft, blades of said rotor having first and second opposite blade edges, a suction head, a radially projecting wall of said head with which said first blade edges are in sliding contact, wall ports of said wall, pump inlet means in communication with said wall ports, radially projecting shroud means integral with said second blade edges are in sliding contact, an axially disposed central member mounted radially inward of said rotor and about which said rotor can rotate, central member ports of said central member, pump discharge means in communication with said central member ports, a lobe of said casing, means for rotating said rotor whereby a fluid material is drawn from said pump inlet means, through said wall ports and within said casing and discharged through said central member ports and said pump discharge means and liquid inlet means whereby upon rotation of said rotor liquid is introduced into said casing within said lobe to be contacted by said fluid material upon passage therethrough and in which said blades are contoured such that blade edges at areas in communication with said central member ports are directed back away from the direction of rotation so as to provide a discharge pitch angle less than 90* at a point of contact with discharged fluid material.

Claim 9

A liquid ring pump including in combination a casing, a rotor shaft supported in said casing, a rotor supported by said rotor shaft, blades of said rotor having first and second opposite blade edges, a suction head, a radially projecting wall of said head with which said first blade edges are in sliding contact, wall ports of said wall, pump inlet means in communication with said wall ports, radially projecting shroud means integral with said second blade edges are in sliding contact, an axially disposed central member mounted radially inward of said rotor and about which said rotor can rotate, central member ports of said central member, pump discharge means in communication with said central member ports, a lobe of said casing, means for rotating said rotor whereby a fluid material is drawn from said pump inlet means, through said wall ports and within said casing and discharged through said central member porTs and said pump discharge means and liquid inlet means whereby upon rotation of said rotor liquid is introduced into said casing within said lobe to be contacted by said fluid material upon passage therethrough and in which said blades are contoured such that blade edges at areas in communication with said wall ports are directed forward in the direction of rotation so as to provide a pitch angle less than 90* at point of contact with incoming fluid material and blade edges at areas in communication with said central member ports are directed back away from the direction of rotation so as to provide a discharge pitch angle less than 90 degrees at point of contact with discharged fluid material.

Claim 10

A liquid ring pump including in combination a casing, a rotor shaft supported in said casing, a rotor supported by said rotor shaft, blades of said rotor having first and second opposite blade edges, a suction head, a radially projecting wall of said head with which said first blade edges are in sliding contact, wall ports of said wall, pump inlet means in communication with said wall ports, radially projecting shroud means integral with said second blade edges are in sliding contact, an axially disposed central member mounted radially inward of said rotor and about which said rotor can rotate, central member ports of said central member, pump discharge means in communication with said central member ports, a lobe of said casing, means for rotating said rotor whereby a fluid material is drawn from said pump inlet means, through said wall ports and within said casing and discharged through said central member porTs and said pump discharge means and liquid inlet means whereby upon rotation of said rotor liquid is introduced into said casing within said lobe to be contacted by said fluid material upon passage therethrough and in which said blades are contoured such that blade edges at areas in communication with said wall ports are directed forward in the direction of rotation so as to provide a pitch angle less than 90* at point of contact with incoming fluid material and blade edges at areas in communication with said central member ports are directed back away from the direction of rotation so as to provide a discharge pitch angle less than 90 degrees at point of contact with discharged fluid material.

Claim 11

A pump in accordance with claim 4 having angled guide vanes in said pump inlet means to direct fluid flow such that flow is directed at an angle less than 90* from the surface of said plate in the direction of the communicating rotor blades.

Claim 12

A pump as set forth in claim 5 having angled guide vanes in said pump discharge means to direct fluid flow such that flow is directed at an angle less than 90* from the central member and in the direction of the communicating rotor blades.