Seal structure for upward return mud in power head of shaft boring machine
A technology of drilling rig power head and sealing structure, applied in drilling equipment, earthwork drilling, drilling equipment and methods, etc., can solve the problems of affecting service life, tearing of rubber seals, contamination of power head gears and bearings, etc. Achieve the effect of prolonging the service life, good sealing effect and reducing the cost of use
Inactive Publication Date: 2013-07-10
CHINA COAL MINE CONSTR GRP
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Problems solved by technology
[0002] The power head in the power head shaft drilling rig is the heart of the drilling rig. It also shoulders the task of transmitting the driving torque and removing the cuttings and slag carried in the mud. Therefore, the failure of the seal for the mud returned will make the mud foul the power head. The gears and bearings in it, and affect their service life
[0003] A rubber seal bonded by two materials has been used in the power head, but when the power head rotates, due to the friction force, the rubber seal will tear along its bonding surface, and this form works effectively Only lasts about two months
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Embodiment Construction
[0016] see figure 1 , this embodiment is a dynamic sealing structure formed by the wear-resistant sleeve 6 and the seal sleeve 3 pressed on the top of the wear-resistant sleeve. A non-rotating member with a fixed shaft, the end cover 1 presses against the top of the sealing sleeve 3;
[0017] figure 1 As shown, the sealing surface of the sealing sleeve 3 in this embodiment is the end surface of an axial boss 3a; a radial boss 3b is arranged on the outer periphery of the sealing bush 3, and a pressure boss 3b is arranged axially on the radial boss 3b. A spring seat, a compression spring 2 is placed in the compression spring seat, and the compression spring 2 provides an axial pre-tightening force between the gland 1 and the sealing sleeve 3. As shown in the figure, a sealing ring 3c is arranged on the outer periphery of the sealing sleeve 3.
[0018] The wear-resistant sleeve 6 in this embodiment is composed of a wear-resistant sleeve body and a wear-resistant ring 5. The wea...
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The invention discloses a seal structure for upward return mud in a power head of a shaft boring machine, which is characterized in that: a wear-resistant sleeve and a sleeve gasket pressed at the top end of the wear-resistant sleeve form a moving seal structure; in the moving seal structure, the wear-resistant sleeve is a rotatable component driven by a gear; the sleeve gasket is a non-rotatablecomponent fixed by a pin shaft; an end cover is pressed against the top end of the sleeve gasket; and an oil passage is reserved on the sidewall of the sleeve gasket, and is communicated between an oil cup and the seal surface of the sleeve gasket. The seal structure can effectively improve the moving seal reliability of upward return mud parts in the power head of the shaft boring machine, and has prolonged service life.
Description
technical field [0001] The invention relates to a sealing structure, more specifically to a sealing structure for returning mud in the power head of a shaft drilling rig. Background technique [0002] The power head in the power head shaft drilling rig is the heart of the drilling rig. It also shoulders the task of transmitting the driving torque and removing the cuttings and slag carried in the mud. Therefore, the failure of the seal for the mud returned will make the mud foul the power head. gears and bearings, and affect their service life. [0003] A rubber seal bonded by two materials has been used in the power head, but when the power head rotates, due to the friction force, the rubber seal will tear along its bonding surface, and this form works effectively The time can only last about two months. Contents of the invention [0004] In order to avoid the disadvantages of the prior art, the present invention provides a sealing structure for the upper mud return in t...
Claims
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IPC IPC(8): E21B7/00
Inventor 丁明王占军周艳
Owner CHINA COAL MINE CONSTR GRP