A high-efficiency axial-flow water turbine with spring card guide

Abstract

The invention relates to an efficient axial-flow water turbine with a spring clamping piece for guidance. The efficient axial-flow water turbine comprises such parts as a shell, an impeller and an output shaft. A bypass port is formed in the shell and near a water inlet; a water stop plate is mounted in the bypass port through tight fit, and is connected with a speed adjusting shaft; and the spring clamping piece is arranged above a water turbine cavity near the bypass port. The spring clamping piece is respectively connected with a fixed expansion pin and a connecting expansion pin by two ends of an extension spring; and a guide clamping piece is movably connected to the connecting expansion pin. A shell center hole is formed in the shell in the axial center position of the impeller. Compared with the efficient axial-flow water turbine with the spring clamping piece for guidance has the advantages of more accurate speed adjustment, simple operation, capability of realizing a speed compensation function and high working efficiency.

Description

technical field [0001] The invention relates to a water turbine, in particular to a high-efficiency axial-flow water turbine with a spring card guide. Background technique [0002] The water turbine is one of the main parts on the sprinkler, which can convert the kinetic energy of the water flow into mechanical energy to provide power for the recovery of the sprinkler. At present, when the water turbine is working, the water flow directly impacts the impeller to do work after entering the impeller cavity. Such a structure cannot adjust the flow rate of the water entering the impeller in a timely and sensitive manner when the speed of the water turbine is adjusted, and the utilization rate of the water flow energy is low. Moreover, the water flow enters and exits in the tangential direction of the impeller, and the water flow is in a straight line, that is, the water flow inlet of the impeller cavity and the water flow outlet of the impeller cavity are in a straight line, the...

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Problems solved by technology

At present, when the water turbine is working, the water flow directly impacts the impeller to do work after entering the impeller cavity. This structure cannot timely and sensitively adjust the water flow into the impeller when the water turbine speed is adjusted, and the utilization rate of water flow energy is low.

Moreover, the water flow enters and exits in the tangential direction of the impeller, and the water flow is on a straight line, that is, the water flow inlet of the impeller cavity and the water flow outlet of the impeller cavity are on a straight line, the time for the water flow to pass through the water turbine cavity is short, and the water flow energy utilization coefficient is low. Therefore, the disadvantages of low equipment efficiency and large water pressure loss

The speed adjustment of the impeller of the existing equipment is realized through the bypass pipeline connected outside the water turbine, and the ordinary ball valve is used to change the bypass water flow; this structure has the disadvantages that the structure of the whole machine is not compact and the water flow adjustment is inconvenient

Moreover, the current water turbines all have the disadvantage of non-linear speed adjustment due to the limitation of their bypass design.

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