Upstream pumping strong lubrication type mechanical sealing device
A mechanical sealing device and pumping technology, which is applied to the sealing of the engine, the components of the pumping device for elastic fluid, mechanical equipment, etc., can solve the problems of mechanical seal failure, affecting the service life, unreliable sealing performance, etc. To achieve the effect of continuous effective sealing performance, long service life, improved reliability and stable operating performance
Pending Publication Date: 2022-07-29
丹东合盛密封有限公司 +2
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Problems solved by technology
However, once the spacer fluid loses pressure and the pressure is lower than the pressure of the pumped medium, the pumped medium will be pressed into the sealing end face, resulting in dry friction between the dynamic and static rings, which will cause the mechanical seal to fail very quickly, resulting in unreliable sealing performance and extremely high pressure. Technical problems that greatly affect the service life
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Embodiment Construction
[0018] An embodiment of the upstream pumping strong lubrication type mechanical seal device is constructed as follows figure 1 shown.
[0019] The mechanical sealing device is installed and arranged in the sealing cavity 25 between the pump cover 20 and the pump shaft, and is composed of the transmission ring 14 , the limiting block 4 and the screw 5 assembled together.
[0020] The composition of the mechanical seal system device includes a pump shaft sleeve 1, a moving ring 10, a double static ring 11, 12 and a compensation mechanism 23, 24, which are installed in the left and right glands 3, 2, and the left and right glands 3, 24. A static sealing point sealing ring a is provided between the two, and a static sealing point sealing ring b is provided between the right gland 2 and the pump cover 20 , which is sealed and assembled on the atmospheric side K of the pump cover 20 .
[0021] The moving ring 10 is fixed on the pump shaft sleeve 1 . The double static rings 11 and ...
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The invention provides an upstream pumping strong lubrication type mechanical sealing device which is installed in a sealing cavity between a pump cover and a pump shaft and comprises a gland, a pump shaft sleeve, a movable ring and double static rings, the double static rings are attached to the end faces of the two sides of the movable ring through back side elastic force compensation mechanisms, and sealing end faces are formed. Logarithmic spiral sealing grooves are engraved in the end face of the pumping medium side, the gland on the pumping medium side extends to a sealing cavity between the pump cover and the pump shaft sleeve, a sealing ring cavity is formed between the gland and the pump shaft sleeve, and a lip piece sealing ring isolated from the sealing cavity is arranged at the outer end of the sealing ring cavity. According to the technical scheme, the mechanical sealing end face is under comprehensive barrier protection, pumping media are effectively prevented from invading and moving, and the mechanical sealing device has the technical advantages of being reliable in mechanical sealing and long-term stable in operation performance.
Description
technical field [0001] This patent application relates to a dynamic mechanical seal device, in particular to a double-end mechanical seal device, which is especially suitable for pumping a high-viscosity medium or a double-end mechanical seal device containing particles in the medium. Background technique [0002] It is difficult for the pumping medium with high viscosity and poor lubricating performance to form a liquid film on the end face between the dynamic and static rings. In the existing contact mechanical seal system device, the increase of isolation fluid is used to assist the lubrication and seal. The pressure of the isolating fluid is higher than that of the pumping medium, so that the isolating fluid enters between the end faces of the dynamic and static rings to form an effective liquid film to lubricate the end faces, and at the same time block the pumping medium to ensure no leakage. However, once the isolation fluid loses pressure and the pressure is lower th...
Claims
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IPC IPC(8): F16J15/34F16J15/3204F16J15/3244F16J15/3268F04B53/00
CPCF16J15/3404F16J15/3408F16J15/3452F16J15/3204F16J15/3268F16J15/3244F04B53/00
Inventor 戴伟张普天任福森张宏武
Owner 丹东合盛密封有限公司