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A test bench for seal leakage characteristics with adjustable gap

A kind of experimental platform and characteristic technology, applied in fluid tightness test, liquid tightness measurement using liquid/vacuum degree, fluid dynamics test, etc., can solve the problems of increasing experimental cost and time, and achieve the goal of ensuring uniformity Effect

Active Publication Date: 2019-03-01
XI AN JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In the experimental research of seal leakage characteristics, it is often necessary to redesign some other parts of the test bench due to changes in the test piece and the seal gap, which greatly increases the cost and time of the experiment; in addition, with the deepening of the seal performance research , in order to theoretically analyze the sealing mechanism of the seal, it is necessary to carry out visual measurement of the flow field structure inside the seal, so in the design of the test bench for seal leakage characteristics, it is also necessary to consider the demand for visual measurement of the internal flow field

Method used

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  • A test bench for seal leakage characteristics with adjustable gap
  • A test bench for seal leakage characteristics with adjustable gap
  • A test bench for seal leakage characteristics with adjustable gap

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Embodiment Construction

[0037] The present invention is described in further detail below in conjunction with accompanying drawing:

[0038] refer to figure 1, a kind of adjustable gap seal leakage characteristics and flow field visualization experiment platform provided by the present invention, including compressor 1, bypass valve 2, flow valve 3, straight pipe section 4 before the flow meter, turbine flow meter 5, behind the flow meter Straight pipe section 6, section conversion section 7, rectification grid 8, rectification section 9, contraction section 10, front connection section 11 of the experimental section, total pressure probe 12, piezoelectric converter 13, electronic pressure gauge 14, thermocouple 15, NI acquisition card 16, sealing teeth 17, rotor surface 18, observation plate 19, back baffle 20, rear extension of the experimental section 21, height adjustment plate 22, adjustment bolt 23, smoke generator 24, cooling water tank 25, cooling water pump 26 , Cooling water pipeline 27, c...

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Abstract

The invention discloses a sealing leakage characteristic and flow field visualization experiment table capable of adjusting a gap. The experiment table can adjust a seal gap conveniently and quickly, replace a sealing structure, and can be used for the visualization research of a flow field. An experiment segment is formed by the assembly of sealing teeth, a rotor surface, an observation plate, and a back baffle plate. An adjustment bolt and a height adjustment plate for adjusting the height of the gap are disposed below the sealing teeth. The experiment segment is made of organic glass, and can allow a laser light sheet to pass. The observation plate is provided with a window, and cooperates with a laser light source and a CCD camera of a PIV testing system to carry out the visualization measurement of the flow field. A smoke generator is connected between a metering segment and a rectification segment, and is used for generating tracking particles for the visualization of the flow field. The smoke generator is provided with a cooling system.

Description

technical field [0001] The invention belongs to the technical field of turbomachinery, and in particular relates to a gap-adjustable sealing leakage characteristic test bench. Background technique [0002] In turbines, compressors, pumps and other turbomachinery, the rotary dynamic sealing device is installed in the gap formed by the stator part and the rotor part to control the leakage flow from the high pressure end to the low pressure end in the gap, which is very important for the safety and economy of the turbomachinery. , stable operation has a significant impact. At present, the commonly used dynamic sealing structures include labyrinth seals, honeycomb seals, hole seals and brush seals, and can be divided into interstage seals, shaft seals, blade top seals, impeller inlet seals and diaphragm seals according to different installation positions. . The rotary dynamic seal structure is generally composed of two parts, the rotor part and the sealed stator part, and ther...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M3/28G01M10/00
CPCG01M3/2853G01M10/00
Inventor 晏鑫代欣波张康李军
Owner XI AN JIAOTONG UNIV
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