Dual-fail-safe rotating sealing device for drilling machine water or air supply system
A technology of air supply system and rotary sealing, which is applied in the direction of engine sealing, mechanical equipment, engine components, etc., and can solve problems such as poor sealing capacity of high-pressure air or pressure water, leakage of high-pressure air or pressure water, and influence on normal operation of equipment, etc. , to achieve the effect of ensuring reliable sealing performance and prolonging the service time
Inactive Publication Date: 2019-01-18
CHTC JOVE HEAVY IND
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Problems solved by technology
[0003] At present, the common problem of the rotary sealing device used in drilling rigs is that the ability to seal high-pressure air or pressure water is poor. During the long-term rotating dynamic use process, due to the wear of the sealing ring, the high-pressure air or pressure water is easy to flow from the rotating shaft. Leakage between the seal and the seal, thus affecting the normal operation of the equipment
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[0026] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention can be implemented in various ways defined and covered by the claims.
[0027] see Figure 1 ~ Figure 2 The water supply system of the horizontal directional drilling rig uses a double-safety rotary sealing device, including a rotating shaft 1 used to connect the main shaft of the power head of the horizontal directional drilling rig. The inside of the rotating shaft 1 is provided with a cooling medium circulation channel 10 along the axial direction, and the cooling medium circulation channel 10 The outlet corresponds to the connecting end 11 of the rotating shaft used to connect the main shaft of the power head. A sleeve 2 is provided outside the rotating shaft, and a cooling medium inlet 20 is provided in the middle of the sleeve body.
[0028] A sealing assembly 4 is arranged between the radially outer wall of the rotating...
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The invention provides a dual-fail-safe rotating sealing device for a drilling machine water or air supply system. The device comprises a rotating shaft, the rotating shaft is sleeved with a sleeve, asealing assembling unit is arranged between the rotating shaft and the sleeve, and the portion between a rotating shaft outer check ring and the sealing assembling unit or between a press-fitting assembly and the sealing assembling unit is sleeved with a compensation spring; a secondary sealing ring is arranged at the outer side of the sealing assembling unit. After the sealing assembling unit isabraded in the working process, a radial gap is automatically compensated for under the effect of the compensation spring, a secondary sealing ring is arranged at the axial outer side of the sealingassembling unit as a second sealing structure, and the dual-fail-safe sealing effect is achieved.
Description
technical field [0001] The invention relates to a horizontal directional drilling rig and a fully hydraulic drilling rig technology for geological drilling in the field of trenchless construction technology, in particular to a double-safety rotary sealing device for a water supply or gas supply system of a horizontal directional drilling rig. Background technique [0002] The drilling of the horizontal directional drilling machine is extrusion drilling, that is, the drilling method is that the drill bit squeezes the soil to the radial periphery, and the soil will not be discharged from the ground, so the resistance of the drill bit is very large during the drilling process. The huge friction between the drill bit and the formation will cause the temperature of the contact surface between the drill bit and the drill bit to rise sharply, which will change the metallographic structure of the drill tool material and reduce its performance, and affect the quality of the hole-formi...
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IPC IPC(8): F16J15/34F16J15/3204
CPCF16J15/3204F16J15/3436F16J15/3452F16J15/3464
Inventor 肖海燕汤亮佘国斌
Owner CHTC JOVE HEAVY IND