Split-type flow deflector of injection pump

Abstract

The invention provides a split-type flow deflector of an injection pump. A pump body is included; a pump cavity is in the pump body; a main shaft passes through a vane wheel front cover fixedly arranged on the pump body and then stretches into the pump cavity; a vane wheel is fixedly arranged at the end, located in the pump cavity, of the main shaft; a water inlet of the vane wheel is connected with a water pump inlet of the pump body through one of spraying pipes; nozzles communicating with the pump cavity are further formed in the spraying pipes correspondingly; a water pump outlet communicating with the pump cavity is further formed on the pump body; the flow deflector corresponding to the position of a water outlet of the vane wheel is fixedly arranged in the pump body; the vane wheel is located between the flow deflector and the vane wheel front cover; and a water outlet communicating with the vane wheel and deflecting holes communicating with the pump cavity are formed in the flow deflector. The split-type flow deflector is characterized in that the flow deflector comprises a flow deflector upper plate and a flow deflector lower plate; the metal-material flow deflector lower plate is fixedly arranged on the pump body, and deflecting holes are formed in the flow deflector lower plate; and the plastic-material flow deflector upper plate is fixedly arranged in the position among the pump body, the flow deflector lower plate and the vane wheel front cover. The split-type flow deflector of the injection pump has the advantages that the efficiency and the reliability of the injection pump are improved.

Description

technical field [0001] The invention belongs to a pump structure, in particular to a jet pump structure. Background technique [0002] Jet pump features such as figure 1 Shown is the process in which the main shaft 1 rotates the impeller 2 so that the impeller 2 generates centrifugal force, which promotes the movement of the liquid from the pump inlet A to the water pump outlet B. The liquid delivered by the pump enters the impeller 2 from the pump inlet A through the nozzle 10. The centrifugal force of the motor driven spindle 1 accelerates the pressurized flow. [0003] After the liquid flows out from the impeller 2, it is guided by the deflector, and enters the pump chamber 7 from the hole of the deflector (the pump chamber 7 is sealed by the O-ring 11 arranged on the nozzle 10), and then flows out Water pump outlet B. [0004] Under the action of pressure at the outlet B of the water pump, part of the liquid enters the nozzle 12. The greater the outlet height (liquid ...

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Problems solved by technology

[0006] At present, because the structure of the guide body of the jet pump is one-piece, the shape is complex, and the complex structure can only be completed by plastic injection molding. Plastic products have internal leakage caused by their flexibility and pressure deformation, which has always been low efficiency and poor reliability of the jet pump. The main reason

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