CN200946625Y

CN200946625Y - Sliding thrust bearing string with damping function

Info

Publication number: CN200946625Y
Application number: CN 200620121036
Authority: CN
Inventors: 巩立根
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-07-03
Filing date: 2006-07-03
Publication date: 2007-09-12
Anticipated expiration: 2016-07-03

Abstract

The utility model discloses a sliding thrust bearing string with vibration absorbing function, comprising a plurality of groups of paralleled sliding thrust bearings, each of which consists of a bearing dynamic ring and a bearing static ring, wherein the bearing dynamic ring is pressed and fixed to the shaft by an internal pressing sleeve; the bearing static ring, mounted correspondingly to the bearing dynamic ring, is connected with keys to a vibration absorbing sleeve and pushes a rubber layer in the recess of the vibration absorbing sleeve; outer sides of the bearing dynamic ring and the bearing static ring are sleeved by an external pressing sleeve, on which two ends of the vibration absorbing sleeve lean; outer sides of the external pressing sleeve and the vibration absorbing sleeve is provided with a firmly fixed housing. The utility model, due to adoption of a plurality of thrust bearing groups, can significantly reduce the friction surface load and prolong useful life of the bearings.

Description

Slip thrust string bearing with shock-absorbing function

Technical field

The utility model relates to a kind of slip thrust string bearing, refers to the cod of using on a kind of oil drilling power drilling tool bearing joint especially.

Background technique

In the oil drilling industry, the cod that existing conventional screw drilling tool bearing joint is adopted is the ball string bearing, and the ball string bearing is minimum accessory of life-span in power drilling tool, it has a strong impact on the working life of power drilling tool complete machine, increased drilling tool maintenance number of times, particularly in the deep drilling construction, increased and carried the brill number of times, made drilling cost improve greatly.

The model utility content

The purpose of this utility model is to provide a kind of slip thrust string bearing with shock-absorbing function of long service life.

For achieving the above object, technical solution of the present utility model is:

A kind of slip thrust string bearing with shock-absorbing function, form by the some groups of sliding thrust bearings that axially are arranged side by side, described sliding thrust bearing comprises bearing moving-coil and bearing Jing Quan, described bearing moving-coil is compressed by interior gland and is fixed on the axle, be relatively set with bearing Jing Quan with described bearing moving-coil, the quiet circle key of bearing is connected on the shock absorbing sleeve, and lean on the rubber layer in the groove of shock absorbing sleeve, the quiet circle of described bearing moving-coil and the bearing outside is with outer gland, described shock absorbing sleeve two ends rely on described external pressure and put, described outer gland, the shock absorbing sleeve outside is fastened with shell.

Further, be provided with cooling water channel outside the described interior gland.

Further, described outer gland inboard is provided with cooling water channel.

Further, described shock absorbing sleeve is located on the axle.

After adopting said structure,, can reduce bearing attrition surface load greatly, prolong bearing working life because the utility model string bearing adopts many group thrust bearings; In addition,, greatly reduce the suffered impulsive load of bearing, improve the shaft strength state, to superhard material (such as diamond etc.), can prevent because it is subjected to greater impact load cracked especially because the utility model is provided with damping device.And two couple of the attrition surface of every group of bearing friction part is flexible contact, even transmission shaft has bigger swing, can guarantee that also bearing friction part contacts fully, prevents heel and toe wear.Because bearing joint thrust bearing is the shortest accessory of mud motor life-span, therefore use this thrust bearing group, can prolong bearing joint bulk life time greatly, also prolonged simultaneously power drilling tool (helicoid hydraulic motor) machine life, reduce to carry and bore and maintenance frequency, reduce the overall cost of wellbore construction significantly.

Description of drawings

Fig. 1 is a ssembly drawing of the present utility model;

Fig. 2 is the plan view of shock absorbing sleeve;

Fig. 3 is the plan view of the Jing Quan that floats.

Embodiment:

As shown in Figure 1, the slip thrust string bearing that the utlity model has shock-absorbing function comprises some groups of sliding thrust bearings, every pair of sliding thrust bearing comprises bearing moving-coil 1 and the quiet circle 2 of bearing, bearing moving-coil 1 is compressed by interior gland 3 and is fixed on the axle 4, make between bearing moving-coil 1 and interior gland 3 and the axle 4 and do not produce slide relative, be relatively set with the quiet circle 2 of bearing with bearing moving-coil 1, the quiet circle 2 of bearing is provided with rubber shock-absorbing mechanism 5, this rubber shock-absorbing mechanism 5 comprises shock absorbing sleeve 51 and is located at rubber layer 53 in the groove 52 of shock absorbing sleeve 51, the quiet circle 2 of bearing is fixed on the shock absorbing sleeve 51 with the feather key form, and lean on the rubber layer 53 in groove 52, the quiet circle 2 of bearing shock absorbing sleeve 51 relatively moves axially; Described shock absorbing sleeve 51 is locked and is fixed on the shell 7 by the outer gland 6 of being located at the quiet circle of bearing moving-coil 1 and bearing 2 outsides, makes between shock absorbing sleeve 51 and outer gland 6 and the shell 7 and does not produce slide relative;

Gland 3 outsides and outer gland 6 inboards are respectively equipped with cooling water channel 31,61 in described, in order to cooling and lubricating bearings group.

In addition, described damper mechanism also can be located on the axle 4, can realize the purpose of damping equally.

Fig. 2, Fig. 3 are respectively a kind of structural representation of shock absorbing sleeve 51 and the quiet circle 2 of bearing, can also select other structural type for use, such as can be on shock absorbing sleeve 51 perforate or keyway, and on the outer surface relative position of the quiet circle 2 of bearing, spline etc., its purpose realizes not producing relative rotation between shock absorbing sleeve 7 and the quiet circle 2 of bearing exactly, but allows that slide relative is axially being arranged.

String bearing by many groups of above-mentioned sliding thrust bearings are formed can bear bi-directional axial load, and the bearing pack number can be selected according to magnitude of load; In addition, bearing unit also can be selected different superhard materials according to the thrust load situation.As: to select diamond be high-abrasive material to bearing master attrition surface during drilling well, and auxiliary attrition surface (spacing attrition surface when transmission shaft is scurried out) can adopt cemented carbide as high-abrasive material, can reduce difficulty of processing greatly like this, reduces cost.

Claims

1, a kind of slip thrust string bearing with shock-absorbing function, it is characterized in that, form by the some groups of sliding thrust bearings that axially are arranged side by side, described sliding thrust bearing comprises bearing moving-coil and bearing Jing Quan, described bearing moving-coil is compressed by interior gland and is fixed on the axle, be relatively set with bearing Jing Quan with described bearing moving-coil, the quiet circle key of bearing is connected on the shock absorbing sleeve, and lean on the rubber layer in the groove of shock absorbing sleeve, the quiet circle of described bearing moving-coil and the bearing outside is with outer gland, described shock absorbing sleeve two ends rely on described external pressure and put, described outer gland, the shock absorbing sleeve outside is fastened with shell.

2, the slip thrust string bearing with shock-absorbing function as claimed in claim 1 is characterized in that, the described interior gland outside is provided with cooling water channel.

3, the slip thrust string bearing with shock-absorbing function as claimed in claim 1 is characterized in that described outer gland inboard is provided with cooling water channel.

4, the slip thrust string bearing with shock-absorbing function as claimed in claim 1 is characterized in that described shock absorbing sleeve is located on the axle.