Brush seal
A technology of sealing device and brush seal, which is applied in the direction of machines/engines, leakage prevention, mechanical equipment, etc., can solve problems such as shortening the service life of brush seals, accelerating the wear of brush wires and rotors, and the difficulty of immediate recovery of brush wires, etc., to achieve Alleviate the "lag" effect and stiffening effect of brush wire, improve sealing performance and service life, and reduce friction
Active Publication Date: 2022-04-01
AECC HUNAN AVIATION POWERPLANT RES INST
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Problems solved by technology
[0003] At present, the rear baffle is generally on the low-pressure side of the airflow, while the front baffle is on the high-pressure side of the airflow, and can only withstand a one-way pressure difference. If the flow direction of the airflow changes and the rear baffle is on the high-pressure side, the brush seal The brush filament is prone to deformation, which affects its sealing performance
At the same time, in the prior art, the brush filaments are attached to the rear baffle, and after the brush filaments are offset due to the radial movement of the rotor, the friction force of the rear baffle on the brush filaments makes it difficult for the brush filaments to recover immediately, resulting in "filament lag" "Phenomenon, affecting the sealing effect
In addition, due to the friction between the brush filament and the tailgate, the brush filament will have a stiffening effect, which will accelerate the wear of the brush filament and the rotor, and shorten the service life of the brush seal
Method used
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[0033] Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed descriptions will be omitted.
[0034] Although relative terms such as "upper" and "lower" are used in this specification to describe the relative relationship of one component of an icon to another component, these terms are used in this specification only for convenience, for example, according to the description in the accompanying drawings directions for the example described above. It will be appreciated that if the illustrated device is turned over so...
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The disclosure provides a brush type sealing device, which relates to the technical field of sealing. The brush seal device of the present disclosure includes a mounting seat, a first baffle, a second baffle and a brush wire ring. The mounting base can be sleeved on a rotor; the first baffle is fixed on the inner circumference of the mounting base and can be sleeved on the rotor; the second baffle is fixed on the inner circumference of the mounting base and can be sleeved on the rotor; The brush wire ring is clamped between the first baffle plate and the second baffle plate, and can be sleeved on the rotor, and the inner peripheral surface of the brush wire ring can be sealed with the rotor, and the first baffle plate and the second baffle plate The inner diameters are smaller than the inner diameter of the wire brush ring; a first cavity open to the rotor is provided between the first baffle plate and the wire brush ring, and a second cavity open to the rotor is provided between the second baffle plate and the wire brush ring. The first cavity and the second cavity are symmetrical about the brush filament ring.
Description
technical field [0001] The present disclosure relates to the technical field of sealing, in particular, to a brush type sealing device. Background technique [0002] Brush seal is a common sealing technology, usually used in fields such as aero-engines, to prevent gas from leaking from the high-pressure side to the low-pressure side along the periphery of the rotor. Existing brush seals generally include a front baffle, a rear baffle, and brush filaments between the front baffle and the rear baffle. The brush filaments can be in contact with the rotor, and the seal can still be maintained when the rotor of the engine moves eccentrically. [0003] At present, the rear baffle is generally on the low-pressure side of the airflow, while the front baffle is on the high-pressure side of the airflow, and can only withstand a one-way pressure difference. If the flow direction of the airflow changes and the rear baffle is on the high-pressure side, the brush seal The brush filament ...
Claims
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IPC IPC(8): F01D11/00
Inventor 周坤王晓燕潘君李齐飞力宁翁泽文胡廷勋王智加
Owner AECC HUNAN AVIATION POWERPLANT RES INST