Low-leakage high-flow-resistance alloy cast iron elastic sealing structure with built-in channel
A technology with built-in channels and elastic sealing, which is applied to the sealing of engines, mechanical equipment, engine components, etc., can solve the problems of sealing ring performance impact, sealing ring temperature rise, and reducing the life of sealing rings, so as to improve life and reduce leakage , the effect of reducing leakage
Inactive Publication Date: 2022-04-12
BEIJING UNIV OF CHEM TECH
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Problems solved by technology
Although the leakage of the main sealing surface is small, the friction between the end surface of the sealing ring and the shaft groove will generate a lot of heat, causing the temperature of the sealing ring to rise rapidly, affecting the performance of the sealing ring and reducing the life of the sealing ring
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[0018] The present invention is described in more detail below in conjunction with accompanying drawing example:
[0019] combine Figure 1~2 , P 1 is the high voltage side, P 2 It is the low-pressure side. Under the action of the pressure difference, the alloy cast iron elastic sealing ring 3 will be closely attached to the inner wall of the shaft groove 2, leaving a very thin liquid film between the two. Generally, the surface where it is located is called It is the main sealing surface, that is, where the end surface 4 of the sealing ring is located. Under the action of the elastic force of the sealing ring 3 itself, its outer surface will adhere to the inner surface of the shaft sleeve 1, and this contact surface is called the second sealing surface. When the shaft groove 2 rotates, the end surface 4 of the sealing ring will rub against the shaft groove 2, generating a large amount of heat, which will cause the temperature of the end surface 4 of the sealing ring to ris...
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A method for reducing the temperature of the end face of the sealing ring by increasing the leakage amount through slotting on the end face of the alloy cast iron elastic sealing ring has already been put forward. Although the temperature of the end face of the sealing ring is remarkably reduced through a traditional straight groove, the leakage amount is greatly increased and exceeds the allowable range of the leakage amount. Therefore, the invention discloses a low-leakage high-flow-resistance built-in channel alloy cast iron elastic sealing structure which comprises a built-in channel in an alloy cast iron elastic sealing ring and a chromium-plated sealing ring end face. The characteristic that the flow path of the built-in channel in the sealing ring is long so that the flow resistance can be effectively increased is utilized to reduce the leakage amount of the sealing ring, and as the built-in channel is located in the sealing ring, fluid flowing through the built-in channel can take away part of heat of the sealing ring, the temperature of the sealing ring is obviously reduced, and the sealing effect is improved. And the service life of the sealing ring is prolonged. In addition, the hardness and wear resistance of the sealing ring can be improved after the end face of the sealing ring is plated with chromium, so that the service life of the sealing ring is further prolonged.
Description
technical field [0001] The invention is applied to the rotary sealing structure in the transmission device. Background technique [0002] The transmission device is widely used in aerospace, aviation, machinery, vehicles and other fields. The rotating sealing structure in the transmission device usually needs to use alloy cast iron elastic sealing ring. Under the action of oil pressure, the alloy cast iron elastic sealing ring will be more closely attached to the inner wall of the shaft groove, leaving a very thin liquid film between the two. Generally, the surface where the liquid film is located is called the main sealing surface. Under the action of the elastic force of the sealing ring itself, the outer surface of the alloy cast iron elastic sealing ring will adhere to the inner surface of the shaft sleeve, and this contact surface is called the second sealing surface. Although the leakage of the main sealing surface is small, the friction between the end surface of the...
Claims
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IPC IPC(8): F16J15/32F16J15/324F16J15/3284
Inventor 何立东刘春瑞贾兴运张乐朱晧哲王文昊
Owner BEIJING UNIV OF CHEM TECH