CN201265597Y

CN201265597Y - Hard alloy bearing used for oil drilling machine

Info

Publication number: CN201265597Y
Application number: CNU200820014830XU
Authority: CN
Inventors: 王庆林
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-08-13
Filing date: 2008-08-13
Publication date: 2009-07-01
Anticipated expiration: 2018-08-13

Abstract

The utility model relates to a hard alloy bearing for an oil drilling machine, which is characterized by comprising three combinations, wherein the first combination is a series bearing of a four-point angular contact ball bearing and comprises a bearing outer ring, a bearing inner ring, a bearing rolling body, namely a steel ball, a bearing half inner ring and a bearing half outer ring; the second combination is a large hard alloy sliding bearing and comprises a large hard outer sleeve and a large hard inner sleeve; the third combination is a small hard alloy sliding bearing and comprises a small hard outer sleeve and a small hard inner sleeve; the upper end of the large hard alloy sliding bearing is connected with the lower end of the series bearing of the four-point angular contact ball bearing, and the upper end of the small hard alloy sliding bearing is connected with the lower end of the large hard alloy sliding bearing. Because the utility model adopts the advantages of the three combinations of the rolling bearing and the sliding bearing, the power driving task from a motor to a drilling head can be jointly completed.

Description

A kind of cemented carbide bearing of using on the oil drilling machine

A kind of oil drilling machine that technical field the utility model relates to field of bearings rolls and the three combination cemented carbide bearings that slide

The ball bearing that background technique is generally used at present all comprises bearing inner race, rolling element and bearing outer ring, retainer, bearing is arranged between bearing inner race and the bearing outer ring, between bearing inner race and bearing outer ring, be equipped with ring raceway, the ring raceway sectional shape is a circular arc, and the radius of this circular arc is greater than the radius of ball, the ball journal of this structure can only bear radial load, can not bear thrust load, and each ball and bearing outer ring and bearing inner race have only one to connect melting point respectively, the radially ability of bearing also is subjected to certain restriction, when the bearing physical dimension is restricted, and when bearing the ultimate bearing load greater than existing ball bearing, will reduce greatly the working life of this airframe bearing.On many special devices with specific (special) requirements, physical dimension is little, and bearing load is big, thereby existing ball bearing can't satisfy the requirement of above equipment.Can only bear radial load and can not bear the thrust load defective for overcoming above ball bearing, now much people have brought into use maximum 4 to overlap the ball bearing of combination, but influenced by its machining accuracy and usage space, assembly precision all is difficult to reach precision bearing and uses standard-required.

The bearing of oil drilling machine is different from common use bearing, and under the abominable working environment below 1000 meters, bearing must guarantee high strength, high wear resistance, performances such as high self lubricity, high rotating speed use.General bearing is easy under the situation of service condition difference, rotate stuck can't proper functioning, can cause the bearing burn when serious, the auger spindle damage brings serious economy loss.

The summary of the invention the purpose of this utility model provides a kind of rotating mass and the high oil drilling machine that is exclusively used in of rotating accuracy rolls and the three combination cemented carbide bearings that slide, have three to constitute, its first combination is the string bearing of 4 angular contact ball bearings, structure has bearing outer ring, bearing inner race, bearing roller---and steel ball, bearing half inner ring, bearing semi outer rings are formed, the mode of assembling adopts known technology to connect and assembles, and machining accuracy is higher than plain bearing; Second combination is big carbide sliding bearing, its structure is divided into cover and big hard coat in the big hard, the inner and outer surface of interior cover of its big hard and big hard coat all is that netted huge cemented carbide is formed, and connection and assembling mode are that cover in the big hard is installed in the big hard coat; The 3rd combination is little carbide sliding bearing, its structure is divided into cover composition in little hard coat and the little hard, the inner and outer surface of cover and little hard coat all is that little huge netted thin cemented carbide is formed in its little big hard, and Placement is that cover in the little hard is installed in the little hard coat;

The string bearing of 4 angular contact ball bearings that 10 parts of first combination are formed; Be installed in the top of well drill bit; The abrasion-resistant slide bearing that also has big carbide sliding bearing, little carbide sliding bearing two small one and large one cemented carbide structure of cover; Big carbide sliding bearing upper end is connected with the string bearing lower end of 4 angular contact ball bearings, and little carbide sliding bearing upper end is connected with big carbide sliding bearing lower end, and little carbide sliding bearing lower end is connected with auger axis.

The oil drilling machine bearing must be the specific bearing of special construction special material.Rolling and the three combination cemented carbide bearings that slide, is the precision bearing on a kind of large-size drill parts that are used for high speed oil drilling machine.Its bearing structure and accuracy of manufacturing directly influence bit speed and the drilling cost of oil drilling machine under the stratum below 1000 meters.

Influenced by its machining accuracy and usage space, the maximum 4 cover combinations of general bearing, assembly precision all is difficult to reach the precision bearing standard-required, and difficult point is the processing assembly precision.The main inventive point of the utility model is: the string bearing that a kind of 4 angular contact balls of a cover of 10 parts combination are provided, be not only like this, below this string bearing, also connect two small one and large one cemented carbide slip combination bearings of cover, the characteristics of this carbide sliding bearing are that high Sliding velocity is arranged, and part surface hardness is higher than general bearing HRC60, reaches more than the HRC75, do not have high hardness in its part heart portion, enough toughness is arranged.According to of the abominable operating conditions analysis of oil drilling machine in the down-hole, the surface hardness of sliding bearing entirely more than HRC75 also cannot, need have firmly soft.Only in this way, just can make bearing at work, when hard slurry dirt entered bearing, bearing still can work on.The utility model is inlayed the cemented carbide of 0.1-0.2 millimeter on the domestic and foreign work surface of sliding bearing, like this, the cemented carbide place, hardness can reach more than the HRC75, and the cemented carbide joint can reach the hardness of heart portion.Satisfy the usage requirement of oil drilling machine.

The utility model has following advantage compared to existing technology:

Not only can make the bearing of high speed rotating can bear powerful axial impact force, and can also bear radial load, and then the rotating mass and the rotating accuracy of whole bearing have been improved again, thoroughly eliminated in the deep layer drilling well below 1000 meters, because abominable operating conditions, cause bearing stuck, many drawbacks and potential safety hazards such as combustion axle, trepan damage, the working life of having improved whole bearing; The precision of 10 groups of 4 angular contact ball bearings makes up, and has guaranteed to transmit the reliability of spindle speed, improves the rotating speed of bearing, and can reduce friction, and reduces the revolution noise; 2 groups of carbide sliding bearings have guaranteed the high speed of transmission main shaft rotating speed, steady, low noise, and mechanical resonant frequency is changed, and reduce the vibrations of trepan under the state of running up, the rotating accuracy height, and noise is little.

The combination of rolling bearing and sliding bearing has been brought into play under special occasions, and the advantage of rolling bearing and the advantage of sliding bearing are finished the power transmission task of motor to drill bit jointly.

Description of drawings

Fig. 1 is the string bearing simplified schematic diagram of 4 angular contact ball bearings of the utility model

Fig. 1-1 bearing outer ring simplified schematic diagram

Fig. 1-1-1 bearing outer ring simplified schematic diagram

Fig. 1-2 bearing inner race simplified schematic diagram

Fig. 1-2-1 bearing outer ring simplified schematic diagram

Fig. 1-3 bearing semi outer rings simplified schematic diagram

Fig. 1-3-1 bearing semi outer rings simplified schematic diagram

Fig. 1-4 bearing half inner ring simplified schematic diagram

Fig. 1-4-1 bearing half inner ring simplified schematic diagram

Fig. 2-the 1st, big hard coat simplified schematic diagram

Cover simplified schematic diagram in Fig. 2-the 2nd, big hard

Fig. 3-the 1st, little hard coat simplified schematic diagram

Fig. 3-1-1 is the local simplified schematic diagram of amplifying of little hard coat

Cover simplified schematic diagram in Fig. 3-the 2nd, little hard

Embodiment is in Fig. 1, Fig. 2, oil drilling machine shown in Figure 3 roll and slide three combination cemented carbide bearing simplified schematic diagram, have three to constitute, its first combination is the string bearing 1 of 4 angular contact ball bearings, structure has eight altogether of bearing outer rings 2, bearing inner race 3 to amount to eight, bearing roller---and 4 one hundred six ten two of steel balls, two altogether of bearing half inner rings 5, bearing semi outer rings 6 amount to two compositions, and the mode of assembling adopts known technology to connect and assembles; Second combination is big carbide sliding bearing, its structure is made up of cover 8 in big hard coat 7 and the big hard, connection and assembling mode are that cover 8 in the big hard is installed in the big hard coat 7: the 3rd combination is little carbide sliding bearing, its structure is made up of cover 10 in little hard coat 9 and the little hard, and Placement is that cover 10 in the little hard is installed in the little hard coat 9;

First makes up string bearing 1 (see figure 1) of 4 angular contact ball bearings of 10 parts compositions, is installed in the top of well drill bit axle; The abrasion-resistant slide bearing (seeing Fig. 2, Fig. 3) that also has big carbide sliding bearing, little carbide sliding bearing two small one and large one cemented carbide structure of cover; Big carbide sliding bearing upper end is connected with the string bearing lower end of 4 angular contact ball bearings, and little carbide sliding bearing upper end is connected with big carbide sliding bearing lower end, and little carbide sliding bearing is connected with auger axis.

Claims

1, a kind of cemented carbide bearing of using on a kind of oil drilling machine, it is characterized in that: have three to constitute, its first combination is the string bearing of 4 angular contact ball bearings, structure has bearing outer ring, bearing inner race, bearing roller---and steel ball, bearing half inner ring, bearing semi outer rings are formed, and assemble with known technology; Second combination is the big carbide sliding bearing that there is netted alloy structure on the surface, and its structure is divided into cover in big hard coat and the big hard, connects and assembling mode is to be installed in the big hard coat overlapping in the big hard; The 3rd combination is the little carbide sliding bearing that there is netted alloy structure on the surface, and its structure is formed by overlapping in little hard coat and the little hard, and Placement is that cover in the little hard is installed in the little hard coat; Big carbide sliding bearing upper end is connected with the string bearing lower end of 4 angular contact ball bearings, and little carbide sliding bearing upper end is connected with big carbide sliding bearing lower end.