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Mud-prevention sealing device of power head

A technology of sealing device and power head, which is applied in the field of power head, can solve the problems of high cost, easy wear, frequent replacement of dust seal 2, etc., and achieve the effect of improving overall performance and avoiding frequent maintenance

Active Publication Date: 2013-01-02
QINGDAO LOVOL EXCAVATOR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This dust-proof device adopts oil seal sealing technology, and its structure is relatively simple, which can prevent mud and water from entering the inside of the first power head box body 7 to a certain extent. Ring 2 will be replaced more frequently and the cost will be higher

Method used

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  • Mud-prevention sealing device of power head
  • Mud-prevention sealing device of power head
  • Mud-prevention sealing device of power head

Examples

Experimental program
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Embodiment Construction

[0026] Examples such as Figure 5 , Figure 6 As shown, a power head anti-mud sealing device includes a power head shock absorber B and a power head case A, the bottom of the power head shock absorber B is provided with a shock absorbing bottom plate H, and the upper end of the power head case A is provided with The upper sealing gland E is characterized in that:

[0027] There is a sealed cavity L between the shock absorber B and the power head box A;

[0028] A labyrinth sealing structure is provided between the contact surface of the upper sealing gland E and the shock-absorbing bottom plate H;

[0029] Lubricating grease is filled in the sealing cavity L and the labyrinth sealing structure.

[0030] The labyrinth sealing structure is composed of a groove arranged at the lower part of the shock-absorbing bottom plate H and a boss arranged on the upper sealing gland E matched with the groove, and the groove and the boss are in clearance fit.

[0031] The gap between the ...

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Abstract

The invention discloses a mud-prevention sealing device of a power head. The mud-prevention sealing device comprises a power head shock-absorbing device and a power head box body, wherein a shock-absorbing base plate is arranged at the bottom of the power head shock-absorbing device, an upper sealing pressing cover is arranged at the upper end of the power head box body, a sealing cavity is arranged between the shock-absorbing device and the power head box body, a labyrinth sealing structure is arranged between contact surfaces of the upper sealing pressing cover and the shock-absorbing base plate, and the inside of the sealing cavity and the inside of the labyrinth sealing structure is filled with lubricating grease. By the aid of the technical scheme, the service lives of gears, bearings, oil seals and gear lubricating grease inside the power head box body are prolonged, the problems of frequent maintenance of the power head and the high maintenance cost which are caused by the fact that mud enters the power head are avoided, and the overall performance of the power head is improved.

Description

technical field [0001] The invention relates to a power head of a rotary drilling bit, in particular to a mud-proof sealing device for the power head. Background technique [0002] Rotary drilling rigs have been widely used in pile foundation construction. The power head is the key working part of the rotary drilling rig. Whether it can work normally directly affects the construction efficiency of the rotary drilling rig. There are gears, bearings, oil seals and other precision parts inside the power head box. The box is required to be tightly sealed, and impurities such as mud are not allowed to enter the inside of the power head box. However, during the construction process of the rotary drilling rig, due to the insufficient sealing and protection measures for the upper part of the power head, the mud entered the inside of the power head box, resulting in deterioration of the gear oil of the power head, damage to gears, bearings and oil seals, and the failure of the power ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16J15/16F16J15/447F16J15/40
Inventor 黄鹏李慧贾玺李建坤刘清泉石少卿
Owner QINGDAO LOVOL EXCAVATOR
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