A self-priming jet pump includes a pump body provided with a water inlet and a water outlet. A jet tube and an impeller are arranged in the pump body. The jet tube is communicated with the water inlet and an inlet of an impeller. A first channel is arranged on the outer periphery of the jet tube. The first channel is communicated with the water inlet and the impeller. A cross-section of the first channel is a closed or open annular structure, and the first channel is around the outer periphery of the jet tube. The first channel is provided with a valve core. When a pressure at the water inlet is greater than a predetermined pressure at the impeller, the valve core moves to switch on the first channel. A cavitation problem is relieved by arranging the flow-increasing channel.

A self-priming jet pump includes a pump body provided with a water inlet and a water outlet. A jet tube and an impeller are arranged in the pump body. The jet tube is communicated with the water inlet and an inlet of an impeller. A first channel is arranged on the outer periphery of the jet tube. The first channel is communicated with the water inlet and the impeller. A cross-section of the first channel is a closed or open annular structure, and the first channel is around the outer periphery of the jet tube. The first channel is provided with a valve core. When a pressure at the water inlet is greater than a predetermined pressure at the impeller, the valve core moves to switch on the first channel. A cavitation problem is relieved by arranging the flow-increasing channel.

A hemispherical entrainment-type high-flow self-priming centrifugal pump includes a hemispherical entrainment system, a pump body and a pump inlet pipe. The hemispherical entrainment system is disposed above the pump body. The hemispherical entrainment system comprises four layers of entrainment cavities, including a spherical entrainment interior cavity, a primary entrainment cavity, a secondary entrainment cavity and a tertiary entrainment cavity. The spherical entrainment interior cavity is a double circular pipeline that ascends in a spiral overlapping manner to wrap a hemispherical surface, and improves the entrainment capacity, while increasing the entrainment area. The primary entrainment cavity is allowed to be in communication with the secondary entrainment cavity and the tertiary entrainment cavity by upward sliding of a sliding check core. The secondary entrainment cavity entrains the gas in the pump inlet pipe, and the primary entrainment cavity entrains the gas in a pump cavity.

An inter-compressor case for a gas turbine engine is disclosed. The inter-compressor case comprises: an outer casing and an inner casing radially spaced apart relative to a longitudinal axis; a gas path extending from a plurality of radial inlets arranged in a circumferentially spaced apart array around the outer casing to an annular outlet defined by an axially extending downstream portion of the outer casing and an axially extending downstream portion of the inner casing; a plurality of struts having a gas path surface extending across the gas path between the outer casing and the inner casing; and a plurality of flow separators extending from the adjacent radial inlets. The flow separators have trailing edges disposed upstream of the annular outlet and include a plurality of full length flow separators and a plurality of truncated flow separators.

Turbine pump assemblies and methods of making the same are provided. The assemblies include a body, a centrifugal pump having a shroud located within the body, a shroud cavity formed external to the shroud, and an ejector pump fluidly connected to the shroud cavity by a purge gas flow path, the ejector pump configured to reduce a pressure within the shroud cavity.

A self-priming jet pump includes a pump body provided with a water inlet and a water outlet. A jet tube and an impeller are arranged in the pump body. The jet tube is communicated with the water inlet and an inlet of an impeller. A first channel is arranged on the outer periphery of the jet tube. The first channel is communicated with the water inlet and the impeller. A cross-section of the first channel is a closed or open annular structure, and the first channel is around the outer periphery of the jet tube. The first channel is provided with a valve core. When a pressure at the water inlet is greater than a predetermined pressure at the impeller, the valve core moves to switch on the first channel. A cavitation problem is relieved by arranging the flow-increasing channel.

A self-priming jet pump includes a pump body provided with a water inlet and a water outlet. A jet tube and an impeller are arranged in the pump body. The jet tube is communicated with the water inlet and an inlet of an impeller. A first channel is arranged on the outer periphery of the jet tube. The first channel is communicated with the water inlet and the impeller. A cross-section of the first channel is a closed or open annular structure, and the first channel is around the outer periphery of the jet tube. The first channel is provided with a valve core. When a pressure at the water inlet is greater than a predetermined pressure at the impeller, the valve core moves to switch on the first channel. A cavitation problem is relieved by arranging the flow-increasing channel.

An intelligent failure self-diagnostic convertible jet pump includes a control circuit system, a drive motor, a junction box, a light guide column and hydraulic components. The control circuit system includes a signal acquisition circuit, a MCU circuit, a drive circuit and an alarm display circuit. The control circuit system is disposed in the junction box and connected to the drive motor. The junction box is fixed on the surface of the motor housing using via screws and locking mechanism. The light guide column is fixed on the junction box and connected to the diagnostic control panel of the control circuit system. The hydraulic components include a venturi, a diffuser and an impeller. The impeller is coaxially connected to the drive motor.

The present invention discloses an adjusting apparatus for improving an anti-cavitation effect of a water pump. The adjusting apparatus comprises a centrifugal impeller (10), a volute (20), an adjusting device (30), a jet device (40), a pressure and/or flow monitoring device, and a controller. The centrifugal impeller comprises a rear side labyrinth seal (15) and a front side labyrinth seal (16), and the volute comprises a first sealing portion (21), a first pressure adjusting cavity (22), a second sealing portion (23) and a second pressure adjusting cavity (24), where the position of the first sealing portion is provided with the first pressure adjusting cavity, the position of the second sealing portion is provided with the second pressure adjusting cavity, the second pressure adjusting cavity is in communication with the first pressure adjusting cavity through the first pipeline.

The present invention discloses an adjusting apparatus for improving an anti-cavitation effect of a water pump. The adjusting apparatus comprises a centrifugal impeller (10), a volute (20), an adjusting device (30), a jet device (40), a pressure and/or flow monitoring device, and a controller. The centrifugal impeller comprises a rear side labyrinth seal (15) and a front side labyrinth seal (16), and the volute comprises a first sealing portion (21), a first pressure adjusting cavity (22), a second sealing portion (23) and a second pressure adjusting cavity (24), where the position of the first sealing portion is provided with the first pressure adjusting cavity, the position of the second sealing portion is provided with the second pressure adjusting cavity, the second pressure adjusting cavity is in communication with the first pressure adjusting cavity through the first pipeline.