CN213116144U

CN213116144U - Top drive drilling machine power head capable of preventing eccentric operation of main shaft

Info

Publication number: CN213116144U
Application number: CN202021782624.0U
Authority: CN
Inventors: 温岫; 唐修仁; 邱诚; 谢焰云; 张晓�; 温光俊
Original assignee: CCCC FHDI Engineering Co Ltd
Current assignee: CCCC FHDI Engineering Co Ltd
Priority date: 2020-08-24
Filing date: 2020-08-24
Publication date: 2021-05-04
Anticipated expiration: 2030-08-24

Abstract

A power head of a top drive drilling machine for preventing eccentric operation of a main shaft comprises a water faucet, a driving shaft, an upper driving shaft bearing gland, a lower driving shaft bearing gland, an upper tapered roller bearing, a lower tapered roller bearing, a box body and a sealing ring; the bearing assembly is characterized in that ball bearings are respectively arranged between the upper driving shaft bearing gland and the upper tapered roller bearing and between the lower driving shaft bearing gland and the lower tapered roller bearing. The ball bearing is arranged between the upper and lower driving shaft bearing gland and the tapered roller bearing of the respective end driving shaft, so that the defect that sealing rings at two ends of a main shaft are damaged due to occasional eccentric operation of the main shaft of a power head of a common top drive drilling machine is overcome, the working period of parts and components of a drill bit is prolonged, the drilling working efficiency is improved, the cost of drilling operation is reduced, and the drilling machine has popularization and application values.

Description

Top drive drilling machine power head capable of preventing eccentric operation of main shaft

Technical Field

The utility model relates to a rig unit head technical field, especially a prevent eccentric operation of main shaft top drive rig unit head.

Background

As shown in figure 1, the top drive drilling machine power head structure is common in the geological drilling industry at present and comprises a water faucet (1), a driving shaft (2), an upper driving shaft bearing gland (3), a lower driving shaft bearing gland (4), a box body (5), a transmission gear (6), a power input shaft (7), a power input shaft gear (8) and a drill rod (9), wherein the lower end of the water faucet (1) is in threaded connection with the upper end of the driving shaft (2), the upper driving shaft bearing gland (3), the lower driving shaft bearing gland (4) and the box body (5) are connected through bolts, and the water faucet is used for fixing tapered roller bearings (21) and (22) which penetrate through two ends of the driving shaft (2) of the box body (5).

The working principle is as follows: the transmission gear (6) transmits power from the power input shaft gear (8) to the driving shaft (2), the driving shaft (2) drives the drill rod (9) to rotate, when the whole power head moves downwards, drilling is formed, and otherwise, drilling taking is formed; the water tap (1) is used for delivering slurry to the bottom end of the drill rod (9) through the hollow driving shaft (2) so as to ensure that the drill rod (9) and rock or hard soil are sufficiently lubricated during drilling.

In the figure, the power input shaft gear (8) transmits power to the transmission gear (6), and radial force is transmitted, so that ball bearings are used at two ends of the power input shaft gear (8); the driving shaft (2) is subjected to upward or downward force during drilling or taking out, and the force is large and constantly changes, so tapered roller bearings are used at two ends of the driving shaft (2).

Because the driving shaft (2) is constantly stressed by upward or downward force during drilling or taking out, the stress is large and constantly changes, and the tapered roller bearings (21) and (22) at the two ends of the driving shaft (2) can be slightly worn after a period of time, the thickness of an adjusting gasket (10) between the upper driving shaft bearing gland (3), the lower driving shaft bearing gland (4) and the box body (5) must be adjusted after the power head of the common top drive drilling machine is used for a period of time, so that a gap formed by slight wear of the tapered roller bearings is eliminated. However, after the tapered roller bearing is slightly worn, the power head of the common top drive drilling machine can still work normally, and an operator generally difficultly replaces an adjusting gasket with a proper thickness in time, so that the driving shaft can rotate eccentrically to a certain degree during operation, and sealing rings in pressure covers at two ends of the driving shaft are easy to damage.

Disclosure of Invention

The utility model aims at overcoming the not enough of prior art, and provide a prevent to damage the sealing washer at driving shaft both ends when main shaft eccentric operation, improve unit head life cycle, reduction in production cost, the rig unit head is driven on top of raising the efficiency.

The technical scheme of the utility model is that: a power head of a top drive drilling machine for preventing eccentric operation of a main shaft comprises a water faucet, a driving shaft, an upper driving shaft bearing gland, a lower driving shaft bearing gland, an upper tapered roller bearing, a lower tapered roller bearing, a box body and a sealing ring; the lower end of the water faucet is in threaded connection with the upper end of the driving shaft, an upper driving shaft bearing gland and a lower driving shaft bearing gland are respectively arranged at the upper end and the lower end of the driving shaft penetrating through the box body, the upper driving shaft bearing gland and the lower driving shaft bearing gland are connected with the box body through bolts and are respectively used for fixing an upper tapered roller bearing and a lower tapered roller bearing penetrating through the driving shaft of the box body, and sealing rings are arranged in the upper driving shaft bearing gland and the lower driving shaft bearing gland and are used for keeping the sealing property in the box body and preventing mud from flowing into the box body.

Compared with the prior art, the utility model, set up ball bearing between upper and lower driving shaft bearing gland and the tapered roller bearing of holding the driving shaft separately, solved ordinary top and driven the rig unit head and cause the drawback that main shaft both ends sealing washer damaged because of the eccentric operation of main shaft occasionally, the duty cycle of extension drill bit spare part, part improves probing work efficiency, has reduced the cost of probing operation, has popularization and application and worth.

Drawings

FIG. 1 is a schematic diagram of a power head of a top drive drilling machine in the prior art;

fig. 2 is a schematic structural diagram of an embodiment of the present invention.

Detailed Description

The detailed structure of the present invention will be further described with reference to the accompanying drawings and the detailed description.

Example 1

As shown in fig. 2, a power head of a top drive drilling machine for preventing eccentric operation of a main shaft comprises a water faucet 1, a driving shaft 2, an upper driving shaft bearing gland 3, a lower driving shaft bearing gland 4, an upper tapered roller bearing 21, a lower tapered roller bearing 22, a box body 5 and a sealing ring 11; the water tap is characterized in that the lower end of the water tap 1 is in threaded connection with the upper end of the driving shaft 2, an upper driving shaft bearing gland 3 and a lower driving shaft bearing gland 4 are respectively arranged at the upper end and the lower end of the driving shaft 2 penetrating through the box body 5, the upper driving shaft bearing gland 3 and the lower driving shaft bearing gland 4 are connected with the box body 5 through bolts and are respectively used for fixing an upper tapered roller bearing 21 and a lower tapered roller bearing 22 which penetrate through the upper end and the lower end of the driving shaft 2 of the box body 5, and sealing rings 11 are arranged in the upper driving shaft bearing gland 3 and the lower driving shaft bearing gland 4 and are used for keeping the sealing performance in the box body 5 and preventing slurry from flowing into the box body 5, wherein

ball bearings

31 and 41 are respectively arranged between the upper driving shaft bearing gland 3 and the upper tapered roller bearing 21 and between the lower driving shaft.

Claims

1. A power head of a top drive drilling machine for preventing eccentric operation of a main shaft comprises a water faucet (1), a driving shaft (2), an upper driving shaft bearing gland (3), a lower driving shaft bearing gland (4), an upper tapered roller bearing (21), a lower tapered roller bearing (22), a box body (5) and a sealing ring (11); the water tap is characterized in that the lower end of the water tap (1) is in threaded connection with the upper end of the driving shaft (2), an upper driving shaft bearing gland (3) and a lower driving shaft bearing gland (4) are respectively arranged at the upper end and the lower end of the driving shaft (2) penetrating through the box body (5), the upper driving shaft bearing gland (3) and the lower driving shaft bearing gland (4) are connected with the box body (5) through bolts and are respectively used for fixing an upper tapered roller bearing (21) and a lower tapered roller bearing (22) which penetrate through the upper end and the lower end of the driving shaft (2) of the box body (5), and a sealing ring (11) is arranged in the upper driving shaft bearing gland (3) and the lower driving shaft bearing gland (4) and is used for keeping the sealing property in the box body (5) and preventing slurry from flowing into the box body (5) A first ball bearing (31) and a second ball bearing (41) are respectively arranged between the lower driving shaft bearing gland (4) and the lower tapered roller bearing (22).