Main pump canned motor auxiliary impeller flow measurement device and circuit shunt measurement method

Abstract

The invention provides a main pump shield motor auxiliary impeller flow measuring device. The main pump shield motor auxiliary impeller flow measuring device comprises an auxiliary impeller flowmeter,a flowmeter base, an upper end sleeve, a lower end sleeve, a rotor connecting cylinder and a bottom cover. The upper end of the auxiliary impeller flowmeter is sleeved with the upper end sleeve, theupper end sleeve is connected with the lower end of the rotor connecting cylinder, the upper end of the rotor connecting cylinder is assembled with the tail end of a rotor, the lower end of the auxiliary impeller flowmeter is arranged in the lower end sleeve, the lower end sleeve is assembled with the flowmeter base, and the flowmeter base is fixedly connected with the bottom cover. Shield type nuclear main pump auxiliary impeller flow measuring and inner cold circulation upper and lower branch flow distribution proportion accurate measuring can be achieved, test data reference is provided forshield type nuclear main pump stator and rotor gap design, and main pump inner temperature control, and improvement design of the shield type nuclear main pump is facilitated. Meanwhile, the device is simple in structure, convenient to mount, and direct in measuring. Compared with a traditional experience formula calculation and fluid simulation calculation, the device is more reliable and accurate.

Description

technical field [0001] The present invention relates to the technical field of fluid machinery, in particular, to a flow split test device in a shielded nuclear main pump and a calculation method for a flow split ratio thereof, especially to a flow test device for a shielded nuclear main pump internal cooling system and a circuit flow distribution measurement scheme . Background technique [0002] The shielded nuclear main pump is driven by a shielded motor. Its core feature is to cancel the rotating shaft sealing device of the traditional centrifugal pump, seal the impeller and rotor in the stator shell, and introduce the fluid medium into the motor, thereby transforming the dynamic seal For static sealing, the possibility of liquid leakage is fundamentally eliminated. Therefore, it is widely used to transport radioactive, poisonous and harmful liquid or gas. [0003] The shielded nuclear main pump rotor is provided with an auxiliary impeller, which is composed of a combi...

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Problems solved by technology

This method cannot solve the split ratio of the fluid medium from the outlet of the auxiliary impeller

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