Rotation machine axial force testing apparatus and testing method thereof

Abstract

The invention relates to the technical field of a rotation machine, more particularly to a rotation machine axial force testing apparatus and a testing method thereof. The apparatus comprises a housing, a bearing, a rotation shaft and a sensor. The rotation shaft is fixedly connected to the inner ring of the bearing. The outer ring of the bearing is fixedly connected with the housing. The rotation shaft is sleeved by the sensor. Signals outputted from the sensor are electrically connected to a signal processing device; the rotation shaft and a rotation machine are connected through a keyless connection component and the rotation shaft is connected with a motor through a shaft coupler. The apparatus has great universality to test the axial force of a variety of rotation machines. The apparatus can also carry out / perform in one direction or two directions with a 1% range error tolerance. Simple in structure, the apparatus is an independent device and is convenient to install. When in use, a rotation machine needs not to be modified. Capable of providing an effective means to problems of axial force balance among various machines, the apparatus and method can be promoted for wider applications.

Description

technical field [0001] The invention relates to the field of rotating machinery, in particular to an axial force testing device and a testing method for the rotating machinery. Background technique [0002] Various rotating machinery such as water pumps, fans, compressors, blowers, steam turbines, etc., the blades will generate axial force due to the action of the medium during the rotating process. Take the water pump as an example. During the operation of the vane type water pump, the water flows through the impeller to do work and becomes high-pressure water, which generates a water pressure difference between the front and rear of the impeller. The water pressure difference and hydraulic dynamic reaction force are the main factors for the axial force of the pump rotor. , and the axial force will have an adverse effect on bearing life, running stability, and mechanical loss; in the product design process, it is necessary to consider setting up components that balance the ...

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Problems solved by technology

[0006] At present, the axial force measurement methods include the tension-pressure sensor method and the spring balance measurement method. The tension-pressure sensor method is based on the structure of the centrifugal pump, and the tension-pressure sensor is directly installed on the gland of the centrifugal pump, and the tension piston is connected to the pump rotor. Through it, the axial force is transmitted to the tension and pressure sensor, and then the force is converted into an electrical signal to measure the axial force; the spring scale measurement method is that the bearing seat is fixed on the stator and does not move, and the bearing sleeve and the right bearing seat are clearance fit. The parts installed in the bearing sleeve can move axially together with the rotor. The force measuring rod is connected to the gland, and the axial force is measured with a spring balance using the principle of leverage. When the pump is running, the impeller rotor body acts on the axial force. It is deflected downward to one end, and the rotor is pulled to the center with an external force. This pulling force is equal to the axial force, and the pulling force measured by the force measuring mechanism is the axial force; however, these two methods cannot accurately measure the axial force, and neither Forming an independent measuring device brings difficulty and inconvenience to the measurement

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