CN211540515U

CN211540515U - Durable type rig drive shaft cooling structure

Info

Publication number: CN211540515U
Application number: CN201922328615.8U
Authority: CN
Inventors: 贾若; 盛大志
Original assignee: Shandong Middle Exploration Machinery Co ltd
Current assignee: Shandong Middle Exploration Machinery Co ltd
Priority date: 2019-12-23
Filing date: 2019-12-23
Publication date: 2020-09-22
Anticipated expiration: 2029-12-23

Abstract

The utility model discloses a durable type drilling machine driving shaft cooling structure, which comprises a driving shaft and an outer shaft sleeve, wherein one end of the driving shaft is provided with a driving shaft fixing end, the opposite end of the driving shaft and the driving shaft fixing end is provided with a driving shaft thread, the top end of the driving shaft is annularly cut and provided with a driving shaft limiting groove, the tail end of the driving shaft is annularly cut and provided with a check ring positioning spigot, the bottom end of the driving shaft is nested with a cooling and lubricating shaft sleeve, the utility model uses PTFE with better wear resistance as a sealing material, optimizes a connecting structure, seals two seals at two sides, clamps a sealing element isolating ring at the middle part, locks the upper end and the lower end by a shrink nut, leads the sealed surface to be properly attached with the sealing element, simultaneously, in order to solve the phenomenon that the heat treatment of the cooling shaft sleeve can not reach the hardness requirement, a ceramic spraying layer is additionally, and the surface smoothness is higher, the relative friction coefficient between the sealing surfaces is smaller, and the service life is longer.

Description

Durable type rig drive shaft cooling structure

Technical Field

The utility model belongs to the technical field of rig drive shaft cooling, concretely relates to durable type rig drive shaft cooling structure.

Background

The driving shaft of the drilling machine is one of main components of the drilling machine and plays a role in driving a drill bit, and after the driving shaft is connected with a drill rod, high temperature can be generated during high-speed rotation, so that a cooling mechanism can be arranged at the position of the driving shaft of the drilling machine.

However, the existing drill driving shaft cooling structure still has some unreasonable factors in the process of cooling the driving shaft, and when the existing drill driving shaft cooling structure is used: the cooling mechanism generally uses a V-shaped combined sealing ring, the linear velocity of the sealing element which is mostly used for end face sealing is low, the sealing element is generally suitable for the sealing element with the linear velocity less than 0.5 m, and the relative linear velocity of the sealing element is generally about 4.4m/s when a drilling machine operates, so the service life of the V-shaped combined sealing element in practical use is extremely short, and coking and water leakage can happen after 1 to 2 days of use.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a durable type rig drive shaft cooling structure to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a durable type drilling machine driving shaft cooling structure comprises a driving shaft and an outer shaft sleeve, wherein a driving shaft fixing end is arranged at one end of the driving shaft, a driving shaft thread is arranged at the end, opposite to the driving shaft fixing end, of the driving shaft, a driving shaft limiting groove is formed in the top end of the driving shaft in a circular cutting mode, a check ring positioning spigot is formed in the tail end of the driving shaft in a circular cutting mode, a cooling and lubricating shaft sleeve is nested at the bottom end of the driving shaft, a cooling and lubricating liquid inlet is formed in one side of the driving shaft, a shaft sleeve positioning spigot is formed in the bottom end of the cooling and lubricating shaft sleeve, ceramic coatings are arranged at the upper end and the lower end of the cooling and lubricating shaft sleeve, an axial elastic check ring is clamped at the position, corresponding to the check ring positioning spigot, of the driving shaft, a, the outer shaft sleeve is nested in the outer side of the cooling and lubricating shaft sleeve, a lower tightening nut is bolted to one end of the outer shaft sleeve, an upper tightening nut is bolted to one end, opposite to the lower tightening nut, of the outer shaft sleeve, four groups of PTFE sealing rings and sealing ring isolating rings are arranged inside the outer shaft sleeve in a bolted mode, and the PTFE sealing rings and the sealing ring isolating rings are arranged inside the outer shaft sleeve in a staggered mode.

Preferably, the size of the shaft sleeve oil filling hole is consistent with that of the cooling lubricating liquid inlet.

Preferably, the PTFE seal ring is made of polytetrafluoroethylene.

Preferably, the cooling and lubricating sleeve and the drive shaft are engaged and fixed by a circlip for shaft.

Preferably, the shaft circlip can be completely engaged with the inside of the circlip positioning spigot.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses use the better PTFE of wearability to do the sealing material, and connection structure has been optimized, two sides respectively are sealed, the middle seal spare isolating ring that presss from both sides, upper and lower both ends respectively lock with a shrink nut, make sealed face and the suitable laminating of sealing member, and simultaneously, in order to solve the phenomenon that cooling shaft sleeve thermal treatment can not reach the hardness requirement, at cooling shaft sleeve plus dress ceramic spraying layer, so that its surface hardness can be up to HRC70 degree, and surface finish is also higher, the relative friction coefficient between sealed face is littleer, thereby just also littleer to the wearing and tearing of sealing washer and cooling shaft sleeve, service life is longer.

Drawings

Fig. 1 is a schematic view of the explosion structure of the driving shaft of the present invention;

FIG. 2 is a schematic view of the three-dimensional structure of the cooling and lubricating bushing of the present invention after the installation;

fig. 3 is a schematic view of the explosion structure of the outer sleeve of the present invention;

in the figure: 1. a drive shaft fixing end; 2. a drive shaft limiting groove; 3. a drive shaft; 4. a cooling lubricant inlet; 5. a drive shaft thread; 6. an oil hole of the shaft sleeve; 7. a ceramic coating; 8. a shaft sleeve positioning spigot; 9. a circlip for the shaft; 10. cooling and lubricating the shaft sleeve; 11. a drive shaft positioning spigot; 12. a check ring positioning spigot; 13. an outer sleeve; 14. a lower shrink nut; 15. tightening the nut; 16. a PTFE seal ring; 17. and a seal ring isolating ring.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

Referring to fig. 1-3, the present invention provides the following technical solutions: a durable type drilling machine driving shaft cooling structure comprises a driving shaft 3 and an outer shaft sleeve 13, one end of the driving shaft 3 is provided with a driving shaft fixing end 1, the opposite end of the driving shaft 3 and the driving shaft fixing end 1 is provided with a driving shaft thread 5, the top end of the driving shaft 3 is annularly cut with a driving shaft limiting groove 2, the tail end of the driving shaft 3 is annularly cut with a check ring positioning spigot 12, the bottom end of the driving shaft 3 is nested with a cooling and lubricating shaft sleeve 10, one side of the driving shaft 3 is provided with a cooling and lubricating liquid inlet 4, the bottom end of the cooling and lubricating shaft sleeve 10 is provided with a shaft sleeve positioning spigot 8, the upper end and the lower end of the cooling and lubricating shaft sleeve 10 are both provided with ceramic coatings 7, the position of the driving shaft 3 corresponding to the check ring positioning spigot 12 is clamped with a shaft elastic check ring 9, the lower part of the driving shaft 3 corresponding to the check ring positioning, the outer shaft sleeve 13 is nested on the outer side of the cooling and lubricating shaft sleeve 10, a lower shrink nut 14 is bolted at one end of the outer shaft sleeve 13, an upper shrink nut 15 is bolted at one end of the outer shaft sleeve 13 opposite to the lower shrink nut 14, four groups of PTFE seal rings 16 and seal ring isolating rings 17 are arranged inside the outer shaft sleeve 13, and the PTFE seal rings 16 and the seal ring isolating rings 17 are arranged inside the outer shaft sleeve 13 in a staggered mode.

In order to facilitate the oil filling of the bushing oil filling hole 6, in the present embodiment, it is preferable that the size of the bushing oil filling hole 6 and the size of the cooling lubricant inlet 4 are the same.

In order to make the PTFE seal ring 16 more resistant, in the present embodiment, the PTFE seal ring 16 is preferably made of polytetrafluoroethylene.

In order to firmly fix the cooling and lubricating sleeve 10, in the present embodiment, it is preferable that the cooling and lubricating sleeve 10 and the drive shaft 3 are engaged and fixed by the shaft circlip 9.

In order to facilitate the fixation of the shaft circlip 9, in the present embodiment, it is preferable that the shaft circlip 9 be able to be completely engaged with the inside of the circlip positioning spigot 12.

The utility model discloses a theory of operation and use flow: the utility model discloses install the back well, at first inspect the utility model discloses an installation is fixed and safety protection, then just can use, in using, because the drive of drive shaft 3 makes outer axle sleeve 13 follow and carries out high-speed rotation, and the PTFE sealing washer 16 and the outer axle sleeve 13 that high-speed axle was used then are in the relative static dress attitude, because go up the sealed effect of crimple nut 15 and crimple nut 14 to outer axle sleeve 13 down, make the inside cooling lubrication liquid of cooling lubrication axle sleeve 10 can be at sealing washer spacer ring 17, play the elastic support effect of the high-speed combination sealing washer of countershaft use between cooling lubrication axle sleeve 10 and the outer axle sleeve 13, make PTFE sealing washer 16 when using a period to have wearing and tearing slightly, through squeezing on, the lower nut makes it expand slightly, prolong its life.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a durable type rig drive shaft cooling structure, includes drive shaft (3) and outer axle sleeve (13), its characterized in that: one end of the driving shaft (3) is provided with a driving shaft fixing end (1), one end of the driving shaft (3) opposite to the driving shaft fixing end (1) is provided with a driving shaft thread (5), the top end of the driving shaft (3) is annularly cut to form a driving shaft limiting groove (2), the tail end of the driving shaft (3) is annularly cut to form a check ring positioning spigot (12), the bottom end of the driving shaft (3) is nested with a cooling and lubricating shaft sleeve (10), one side of the driving shaft (3) is provided with a cooling and lubricating liquid inlet (4), the bottom end of the cooling and lubricating shaft sleeve (10) is provided with a shaft sleeve positioning spigot (8), the upper end and the lower end of the cooling and lubricating shaft sleeve (10) are respectively provided with a ceramic coating (7), the position of the driving shaft (3) corresponding to the check ring positioning spigot (12) is clamped with a shaft elastic check ring (9), and the driving shaft (3) is provided with, shaft sleeve oil filler point (6) have been seted up to one side of cooling and lubrication shaft sleeve (10), outer shaft sleeve (13) nestification is in the outside of cooling and lubrication shaft sleeve (10), and the one end bolt of outer shaft sleeve (13) has down crimple nut (14), the relative one end bolt of outer shaft sleeve (13) and lower crimple nut (14) has last crimple nut (15), and the inside of outer shaft sleeve (13) is provided with four groups of PTFE sealing washer (16) and sealing washer spacer ring (17) altogether, PTFE sealing washer (16) and sealing washer spacer ring (17) staggered arrangement are in the inside of outer shaft sleeve (13).

2. A durable type drill drive shaft cooling structure according to claim 1, wherein: the size of the shaft sleeve oil filling hole (6) is consistent with that of the cooling lubricating liquid inlet (4).

3. A durable type drill drive shaft cooling structure according to claim 1, wherein: the PTFE seal ring (16) is made of polytetrafluoroethylene.

4. A durable type drill drive shaft cooling structure according to claim 1, wherein: the cooling and lubricating shaft sleeve (10) and the driving shaft (3) are clamped and fixed through a shaft elastic retainer ring (9).

5. A durable type drill drive shaft cooling structure according to claim 1, wherein: the shaft circlip (9) can be completely engaged in the circlip positioning spigot (12).