A sinusoidal pressure generating device with stepless adjustment of outlet exhaust volume
A technology of stepless adjustment and generating devices, applied in measuring devices, measuring fluid pressure, instruments, etc., can solve problems such as pressure amplitude and pressure dynamic-static ratio cannot be adjusted, pressure amplitude decreases, etc.
Active Publication Date: 2020-12-11
BEIJING CHANGCHENG INST OF METROLOGY & MEASUREMENT AVIATION IND CORP OF CHINA
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Problems solved by technology
When the intake pressure and frequency of the existing modulated sinusoidal pressure generating device are fixed, the pressure amplitude and pressure dynamic-static ratio cannot be adjusted; when the intake pressure is fixed, the pressure amplitude will decrease as the frequency increases, which cannot meet the Occasions where full-band fixed pressure amplitude and large-scale adjustment of pressure amplitude are required
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Embodiment Construction
[0020] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.
[0021] A sinusoidal pressure generating device whose outlet exhaust volume can be adjusted steplessly, the structural principle is as follows figure 1 As shown, its main structure includes: left housing 1, turntable 2, pressure chamber 3, adjustment slider 4, vertical straight bevel gear shaft 5, horizontal straight bevel gear shaft 6, first straight gear shaft fixed bearing 7, second straight bevel gear shaft One bearing mount 8, right housing 9, second spur gear shaft fixed bearing 10, dial 11, third spur gear shaft fixed bearing 12, second bearing mount 13, fourth spur gear shaft fixed bearing 14 and guide rail 15.
[0022] The left casing 1, the turntable 2, the pressure chamber 3, and the right casing 9, as the main body of the device of the present invention, constitute the basic parts of the sinusoidal pressure generating device. The ...
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The invention relates to a sinusoidal pressure generating device with stepless regulation of outlet gas displacement and belongs to the field of test devices. The existing outlet modulation type sinusoidal pressure generating device has the defects that the outlet gas displacement cannot be randomly adjusted, the sinusoidal pressure amplitude is not adjustable, the maximum dynamic-to-static ratiois small, and the like. According to the sinusoidal pressure generating device, a gear set composed of two straight bevel gears and threads between an adjusting sliding block and a vertical straight bevel gear are used as a transmission device, so that the horizontal rotation of an adjusting knob is converted into vertical movement of the adjusting sliding block, and stepless regulation is carriedout on the size of an exhaust port, so that the displacement of the sinusoidal pressure generating device is changed. Under the condition that the air input and the frequency are unchanged, the sinusoidal pressure amplitude and the pressure dynamic-to-static ratio can be regulated through the change of the gas displacement.
Description
technical field [0001] The invention belongs to the field of testing devices, and relates to a sinusoidal pressure generating device with steplessly adjustable outlet exhaust volume. Background technique [0002] The sinusoidal pressure calibration device is used to test and calibrate the amplitude-frequency characteristics of the pressure sensor. The sinusoidal pressure generator, as the core part of the sinusoidal pressure calibration device, is used to generate sinusoidal pressure pulsations with a certain frequency and pressure amplitude. The sinusoidal pressure generating device can be divided into modulated sinusoidal pressure generating device, piston type sinusoidal pressure generating device and resonant sinusoidal pressure generating device according to its principle. Modulated sinusoidal pressure generators are widely used because of their wide frequency range and large pressure amplitude. Modulated sinusoidal pressure generators are divided into inlet modulated ...
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IPC IPC(8): G01L27/00
CPCG01L27/005
Inventor 王辰辰蔡菁王洪博
Owner BEIJING CHANGCHENG INST OF METROLOGY & MEASUREMENT AVIATION IND CORP OF CHINA