Pump apparatus

Patent metadata

Field	Value
Publication number	US-12049906-B2
Application number	US-202118013649-A
Country	US
Kind code	B2
Filing date	Aug 31, 2021
Priority date	Sep 4, 2020
Publication date	Jul 30, 2024
Grant date	Jul 30, 2024

Abstract

A pump apparatus includes: a rotational shaft; a hub portion mounted to the rotational shaft; a centrifugal pump vane mounted to a circumferential surface of the hub portion; an annular disc portion mounted to a tip end of the centrifugal pump vane; and an axial turbine blade mounted to an outer circumferential surface of the annular disc portion. A liquid flow passage through which a liquid flowing from a first side toward a second side in an axis direction of the rotational shaft flows into the centrifugal pump vane is formed at a radially inner side of the annular disc portion, and a gas flow passage through which a gas flowing from the second side toward the first side passes through the axial turbine blade is formed at a radially outer side of the annular disc portion.

First claim

The invention claimed is:

1. A pump apparatus, comprising:
a rotational shaft;
a hub portion mounted to the rotational shaft;
a centrifugal pump vane mounted to a circumferential surface of the hub portion;
an annular disc portion mounted to a tip end of the centrifugal pump vane; and
an axial turbine blade mounted to an outer circumferential surface of the annular disc portion,
wherein a liquid flow passage through which a liquid flowing from a first side toward a second side in an axis direction of the rotational shaft flows into the centrifugal pump vane is formed at a radially inner side of the annular disc portion,
wherein a gas flow passage through which a gas flowing from the second side toward the first side passes through the axial turbine blade is formed at a radially outer side of the annular disc portion, and
wherein at least a portion of an axial extending area of the centrifugal pump vane overlaps an axial extending area of the axial turbine blade.

2. A pump apparatus, comprising:
a rotational shaft;
a hub portion mounted to the rotational shaft;
a centrifugal pump vane mounted to a circumferential surface of the hub portion;
an annular disc portion mounted to a tip end of the centrifugal pump vane; and
an axial turbine blade mounted to an outer circumferential surface of the annular disc portion,
wherein a liquid flow passage through which a liquid flowing from a first side toward a second side in an axis direction of the rotational shaft flows into the centrifugal pump vane is formed at a radially inner side of the annular disc portion,
wherein a gas flow passage through which a gas flowing from the second side toward the first side passes through the axial turbine blade is formed at a radially outer side of the annular disc portion,
wherein the pump apparatus further comprises:
a body-side casing which accommodates the hub portion, the centrifugal pump vane, the annular disc portion, and the axial turbine blade rotatably; and
an inlet-side casing fastened to the first side of the body-side casing,
wherein the inlet-side casing has, formed inside thereof, a liquid introduction passage for introducing the liquid to the centrifugal pump vane, and a gas discharge passage for discharging the gas after passing through the axial turbine blade, the gas discharge passage being formed at a radially outer side of the liquid introduction passage.

3. A pump apparatus, comprising:
a rotational shaft;
a hub portion mounted to the rotational shaft;
a centrifugal pump vane mounted to a circumferential surface of the hub portion;
an annular disc portion mounted to a tip end of the centrifugal pump vane; and
an axial turbine blade mounted to an outer circumferential surface of the annular disc portion,
wherein a liquid flow passage through which a liquid flowing from a first side toward a second side in an axis direction of the rotational shaft flows into the centrifugal pump vane is formed at a radially inner side of the annular disc portion,
wherein a gas flow passage through which a gas flowing from the second side toward the first side passes through the axial turbine blade is formed at a radially outer side of the annular disc portion,
wherein a first-side gap is formed between an end surface of the annular disc portion at the first side and a stationary wall,
wherein a second-side gap is formed between an end surface of the annular disc portion at the second side and the stationary wall, and
wherein the annular disc portion has a through hole formed therein, the through hole being formed through the annular disc portion along the axis direction of the rotational shaft and bringing the first-side gap or a first-side space communicating with the first-side gap and the second-side gap or a second-side space communicating with the second-side gap into communication.

4. The pump apparatus according to claim 3 ,
wherein the through hole has a first-side opening end formed at the first side of the annular disc portion and a second-side opening end formed at the second side of the annular disc portion, and a distance L 1 between a center of the first-side opening end and an axis of the rotational shaft is greater than a distance L 2 between a center of the second-side opening end and the axis of the rotational shaft.

5. The pump apparatus according to claim 3 ,
wherein the through hole has a first-side opening end formed at the first side of the annular disc portion and a second-side opening end formed at the second side of the annular disc portion, and a distance L 1 between a center of the first-side opening end and an axis of the rotational shaft is smaller than a distance L 2 between a center of the second-side opening end and the axis of the rotational shaft.

6. A pump apparatus, comprising:
a rotational shaft;
a hub portion mounted to the rotational shaft;
a centrifugal pump vane mounted to a circumferential surface of the hub portion;
an annular disc portion mounted to a tip end of the centrifugal pump vane; and
an axial turbine blade mounted to an outer circumferential surface of the annular disc portion,
wherein a liquid flow passage through which a liquid flowing from a first side toward a second side in an axis direction of the rotational shaft flows into the centrifugal pump vane is formed at a radially inner side of the annular disc portion,
wherein a gas flow passage through which a gas flowing from the second side toward the first side passes through the axial turbine blade is formed at a radially outer side of the annular disc portion,
wherein a second-side gap is formed between an end surface of the annular disc portion at the second side and a stationary wall, and
wherein the pump apparatus comprises:
a body-side casing which accommodates the hub portion, the centrifugal pump vane, the annular disc portion, and the axial turbine blade rotatably; and
a labyrinth seal which seals a gap between the annular disc portion and the body-side casing at a position closer to the second side than the second-side gap.

7. The pump apparatus according to claim 1 , further comprising:
an inducer formed on the circumferential surface of the hub portion at a position closer to the first side than the centrifugal pump vane, the inducer being configured to apply a pre-swirl, in a rotational direction of the rotational shaft, to the liquid flowing into the centrifugal pump vane.

8. A pump apparatus, comprising:
a rotational shaft;
a hub portion mounted to the rotational shaft;
a centrifugal pump vane mounted to a circumferential surface of the hub portion;
an annular disc portion mounted to a tip end of the centrifugal pump vane; and
an axial turbine blade mounted to an outer circumferential surface of the annular disc portion,
wherein a liquid flow passage through which a liquid flowing from a first side toward a second side in an axis direction of the rotational shaft flows into the centrifugal pump vane is formed at a radially inner side of the annular disc portion,
wherein a gas flow passage through which a gas flowing from the second side toward the first side passes through the axial turbine blade is formed at a radially outer side of the annular disc portion,
wherein the pump apparatus further comprises a body-side casing which accommodates the hub portion, the centrifugal pump vane, the annular disc portion, and the axial turbine blade rotatably,
wherein a gas introduction passage for introducing the gas into the axial turbine blade is formed inside the body-side casing, and
wherein the gas introduction passage is formed partially in a circumferential direction of the rotational shaft.

9. The pump apparatus according to claim 8 ,
wherein the gas introduc

Assignees

• Mitsubishi Heavy Ind Ltd

Inventors

• TAKATA Ryo
• Nakamura Masaharu
• Watanabe Masamitsu
• Hiraki Hiromichi

Classifications

• F02C3/045

  having compressor and turbine passages in a single rotor-module (F02C3/073 takes precedence) · CPC title

• F02C3/073

  the compressor and turbine stages being concentric · CPC title

• F02M37/12

  fluid-driven, e.g. by compressed combustion-air · CPC title

• F04D13/043

  the pump wheel carrying the fluid driving means · CPC title

• F04D29/24

  Vanes · CPC title