Testing air duct for fan air inlet test and operation method of testing air duct
A technology of experimental testing and operation methods, applied in mechanical equipment, machine/engine, pump control, etc., can solve problems such as difficult assembly, inaccurate adjustment of test air duct flow, blockage of pressure measuring holes, etc. Effects of testing procedures, ease of assembly and positioning
Inactive Publication Date: 2018-01-19
HOHAI UNIV CHANGZHOU
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Problems solved by technology
[0004] The technical problem to be solved by the present invention is to overcome the defects of the prior art, provide an industrial centrifugal fan test air duct device and its operation method, in order to solve the inaccurate flow adjustment of the existing test air duct, blockage of the pressure measuring hole, Difficult to assemble and other technical issues
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[0024] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.
[0025] Such as figure 1 and 2 As shown, a fan air intake test test air duct device includes a test air duct 4, a pressure measurement module and a throttling module, and is characterized in that the test air duct 4 is divided into several sections; the pressure measurement module includes The pressure holes 2 and the pressure measuring holes are connected to the pipeline 10 and the pressure gauge, and several groups of pressure measuring holes 2 are arranged on the pipe wall of the test passage, and the pressure measuring holes 2 of each group are arranged in turn on the pipe wall for a week, and are connected with the pressure measuring holes. The hole connection pipe 10 is connected with the...
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The invention discloses a testing air duct device for a fan air inlet test. The testing air duct device comprises a testing air duct, a pressure measuring module and a throttling module. The testing air duct device is characterized in that the testing air duct is divided into a plurality of sections; the pressure measuring module comprises pressure measuring holes, a pressure measuring hole connecting pipeline and a pressure meter; the multiple pressure measuring holes are formed in the pipe wall of a testing channel, sequentially arranged on the periphery of the pipe wall and connected with the pressure measuring hole connecting pipeline and the pressure meter; the throttling module comprises a throttling control board and a damping screen which are arranged in a front testing air duct body and a rear testing air duct body correspondingly; and the throttling control board is used for controlling the flow change in the testing process, and the damping screen is used for stabilizing anair flow to increase the accuracy degree of the measured result. The testing air duct device for the fan air inlet test has the advantages that the flow change is controlled by controlling the openingnumber of holes in the metal throttling board, repeatability for the same testing point can be achieved in the testing process, test operation is facilitated, and the test efficiency is improved; andthe testing air duct is divided into the three sections, and the testing efficiency is improved.
Description
technical field [0001] The invention relates to a centrifugal fan air inlet test test air duct and an operation method thereof, belonging to the technical field of fluid mechanical test devices Background technique [0002] The test air duct is the key equipment to test the performance of the fan. Test the air duct In the test experiment, the initial data of the two performances of the fan flow and pressure are mainly obtained. According to the national standard (GB / T 1236-2000), there are corresponding standardized requirements for the air duct used for industrial fan testing, the proportional relationship between the diameter and length of the air duct, and the position of the pressure measuring hole, the throttling metal mesh, and the rectifying grid Ask to wait. [0003] The length of the traditional test air duct is long, such as figure 1 As shown, the choke metal mesh and rectifying grid are not easy to assemble and locate; the four arm measuring holes evenly distri...
Claims
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Inventor 何小笛纪爱敏方润心盛伟刘源
Owner HOHAI UNIV CHANGZHOU