Shield pump and pump body inlet structure thereof

Abstract

The invention discloses a shield pump and a pump body inlet structure thereof. The pump body inlet structure comprises a pump body (2) and an impeller (1), wherein the impeller (1) is arranged in the pump body (2); the pump body (2) comprises a supporting plate (23) and a supporting column (22); the supporting plate (23) is arranged on one side of the pump body (2) and is close to an inlet (24) of the pump body (2); the supporting column (22) is arranged on the supporting plate (23) and is far away from the inlet (24); the impeller comprises blades (11) and a rotation supporting portion (12); the blades (11) are arranged on one side of the impeller (1) and are close to the inlet (24) of the pump body (2); the rotation supporting portion (12) rotates relative to the supporting column (22); each blade (11) is provided with a center inlet and a blade end outlet; the center inlet of each blade faces the inlet (24) of the pump body (2); and the blade end outlet of each blade is connected with an outlet (25) of the pump body (2). In the pump body inlet structure, the flowing resistance of fluid is reduced effectively, and the water conservancy efficiency of the shield pump is improved.

Description

technical field [0001] The invention relates to the technical field of pump equipment, in particular to a canned pump and its pump body inlet structure. Background technique [0002] Canned pumps are a type of sealless pumps that are often used in hot water heat pumps. In the current canned pump, the inlet structure of the pump body includes a pump body and an impeller arranged at the inlet of the pump body, and a shaft support seat is arranged at the inlet of the pump body to facilitate the rotation of the impeller relative to the pump body. [0003] Since the shaft support seat provides support to the impeller, it is arranged in the inlet of the blade near the inlet, so that the gap between the shaft support seat and the inlet of the blade near the inlet of the impeller is small, due to the blocking of the shaft support seat, making When the impeller rotates at a high speed and sucks in the flow, the fluid will experience greater flow resistance when it flows through the ...

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Problems solved by technology

[0003] Since the shaft support seat provides support to the impeller, it is arranged in the inlet of the blade near the inlet, so that the gap between the shaft support seat and the inlet of the blade near the inlet of the impeller is small, due to the blocking of the shaft support seat, making When the impeller rotates at a high speed and sucks in the flow, the fluid will experience greater flow resistance when it flows through the shaft support seat and enters the inlet of the blade, which in turn will cause a greater resistance loss to the fluid, making the hydraulic efficiency of the canned pump low.

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