CN102828693A

CN102828693A - Roller bit of rolling and sliding floating sleeve bearing

Info

Publication number: CN102828693A
Application number: CN2012103581214A
Authority: CN
Inventors: 梁政; 何畏; 孙宇; 蒋发光
Original assignee: Southwest Petroleum University
Current assignee: Southwest Petroleum University
Priority date: 2012-09-25
Filing date: 2012-09-25
Publication date: 2012-12-19
Anticipated expiration: 2032-09-25
Also published as: CN102828693B

Abstract

The invention relates to a roller bit of a rolling and sliding floating sleeve bearing for drilling petroleum and natural gas. The roller bit is mainly composed of an oil chamber, a slurry nozzle, a tooth claw, a cone, a rolling and sliding floating sleeve and teeth, wherein the outer brim of the floating sleeve is assembled in an inner hole of the cone; the inner brim of the floating sleeve is assembled on a large journal of the tooth claw; 2-8 arc grooves are uniformly distributed on the outer brim of the floating sleeve; 2-8 arc grooves are also uniformly distributed on the inner brim of the floating sleeve; the arc grooves on the outer brim of the floating sleeve and the arc grooves on the inner brim of the floating sleeve are staggered along the circumference; and a roller pin is embedded inside each arc groove, and the diameters of the roller pins are the same. According to the invention, the rotating precision and the lubricating capability of the floating sleeve bearing can be improved, so that the floating sleeve can normally rotate, and the stability of the floating sleeve bearing in a working process is improved, so as to improve the service life and the work efficiency of the roller bit.

Description

A kind of rock bit of skid floating ring bearing

Technical field

The present invention relates to be used for the rock bit of a kind of skid floating ring bearing of oil, natural gas probing.

Background technology

Floating ring bearing is a kind of more special bearing arrangement; After adding floating bushing between the gear wheel of rock bit and the tooth pawl; A friction pair of former bush(ing) bearing is transformed into inside and outside two friction pairs of floating bushing; And the relative sliding velocity of each friction pair all is lower than former bearing, has increased the contact area of rubbing surface, has reduced the frictional power loss of bearing.Therefore, if every other parameter remains unchanged, the rotation of floating bushing will reduce the friction factor of bearing, reduce the frictional power loss and the temperature rise of bearing, cause the rate of wear of bearing to descend, thereby improve the abrasive resistance of bearing.Though floating ring bearing is a kind of sliding bearing with new structure of better development prospect; But the improved place of needs is arranged still; Such as special construction and lubricating system owing to rock bit; The external friction pair between floating bushing and the gear wheel and the lubricant medium of the interior friction pair between floating bushing and the gear claw journal all are difficult to replenished, and need on original structure, improve or adopt new lubricating system; Because the floating bushing in the cone bit bearing is not uniform rotation, but sometimes fast and sometimes slow, hour rotation is very fast in gear wheel load for floating bushing, and along with the increase of load, the floating bushing rotating speed is slack-off, influences the operate as normal of floating ring bearing.

Summary of the invention

The objective of the invention is provides a kind of rock bit of skid floating ring bearing in order to overcome the deficiency of prior art.It can improve the running accuracy and the lubricating ability of floating ring bearing, makes the floating bushing normal rotation, thereby improves the application life and the operating efficiency of rock bit.

Technical scheme of the present invention is: the rock bit of a kind of skid floating ring bearing of the present invention; Mainly form by accumulator, swivel, tooth pawl, gear wheel, skid floating bushing, tooth; Said floating bushing outer rim is assemblied in the endoporus of gear wheel, and the floating bushing inner edge is assemblied on the big axle journal of tooth pawl; The floating bushing outer rim is laid with 2-8 deep-slotted chip breaker, and the floating bushing inner edge also is laid with 2-8 deep-slotted chip breaker; Deep-slotted chip breaker on deep-slotted chip breaker on the floating bushing outer rim and the floating bushing inner edge is along circumferential interlaced arrangement; Inlay a needle roller in each deep-slotted chip breaker, the diameter of needle roller is identical.

Because deep-slotted chip breaker on the floating bushing outer rim and the deep-slotted chip breaker on the floating bushing inner edge are along circumferential interlaced arrangement; In the work, floating ring bearing can form a plurality of oil film wedges, along with the bearing rotating speed raises; Entrainmenting the oil mass that gets into the oil film wedge space increases; The dynamic pressure acting in conjunction that a plurality of oil film wedges space oil film produces makes floating ring bearing when quiet rum, be in the elastic hydrodynamic lubrication state, helps to improve the running accuracy of gear wheel and tooth pawl and the lubricating ability of floating ring bearing.In deep-slotted chip breaker, inlay needle roller, the rolling frictional resistance of needle roller is little, and power consumption is little; Mechanical efficiency is high, is prone to starting, because the slip of floating bushing combines with the rolling of needle roller is ingenious; Can guarantee the normal rotation of floating bushing when load increases, improve floating ring bearing stability in the course of the work.

The physical dimension of above-mentioned skid floating ring bearing can select material different to carry out process and assemble according to different requirement with initial fit clearance, makes the skid floating ring bearing adapt to different working environments better.

The invention has the beneficial effects as follows: the present invention can improve the running accuracy and the lubricating ability of floating ring bearing, makes the floating bushing normal rotation, improves floating ring bearing stability in the course of the work, thereby improves the application life and the operating efficiency of rock bit. ?

Description of drawings

Fig. 1 is the structural representation of the rock bit of a kind of skid floating ring bearing of the present invention.

Fig. 2 is a tooth pawl structural representation of the present invention.

Fig. 3 is the A-A sectional view of Fig. 2.

Among the figure: 1. accumulator, 2. swivel, 3. skid floating bushing, 4. tooth pawl, 5. gear wheel, 6. tooth, 7. floating bushing outer rim, 8. floating bushing inner edge, 9. deep-slotted chip breaker, 10. needle roller, 11. deep-slotted chip breakers.

The specific embodiment

Be described further below in conjunction with the accompanying drawing specific embodiments of the invention.

Like Fig. 1, Fig. 2, shown in Figure 3; The rock bit of a kind of skid floating ring bearing of the present invention; Mainly comprise accumulator 1, swivel 2, tooth pawl 4, gear wheel 5, skid floating bushing 3, tooth 6 compositions, said floating bushing outer rim 7 is assemblied in the gear wheel endoporus, and its inner rim 8 is assemblied on the big axle journal of tooth pawl; Floating bushing outer rim 7 is laid with 2-8 deep-slotted chip breaker 9, and floating bushing inner edge 8 also is laid with 2-8 deep-slotted chip breaker 11; Deep-slotted chip breaker 9 on the floating bushing outer rim 7 and the deep-slotted chip breaker 11 on the floating bushing inner edge 8 are along circumferential interlaced arrangement; Each deep-slotted chip breaker is inlayed a needle roller 10 in (9,11), and the diameter of needle roller 10 is identical.

Because deep-slotted chip breaker on the floating bushing outer rim 7 and the deep-slotted chip breaker on the floating bushing inner edge 8 (9,11) are along circumferential interlaced arrangement; In the work, floating ring bearing can form a plurality of oil film wedges, along with the bearing rotating speed raises; Entrainmenting the oil mass that gets into the oil film wedge space increases; The dynamic pressure acting in conjunction that a plurality of oil film wedges space oil film produces makes floating ring bearing when quiet rum, be in the elastic hydrodynamic lubrication state, helps to improve the running accuracy of gear wheel and tooth pawl and the lubricating ability of floating ring bearing.In deep-slotted chip breaker, inlay needle roller; The rolling frictional resistance of needle roller is little, and power consumption is little, and mechanical efficiency is high; Be prone to starting; Because the slip of skid floating bushing 3 combines with the rolling of needle roller is ingenious, can guarantee the normal rotation of floating bushing when load increases, improve floating ring bearing stability in the course of the work.

According to concrete job requirement, skid floating bushing 3 can select different geometric size and initial fit clearance to carry out process and assemble, makes the skid floating ring bearing adapt to different working environments better.

Claims

1. the rock bit of a skid floating ring bearing; Mainly comprise accumulator (1), swivel (2), tooth pawl (4), gear wheel (5), skid floating bushing (3), tooth (6) composition; It is characterized in that; Said floating bushing outer rim (7) is assemblied in the gear wheel endoporus, and its inner rim (8) is assemblied on the big axle journal of tooth pawl; Floating bushing outer rim (7) is laid with 2-8 deep-slotted chip breaker (9), and floating bushing inner edge (8) also is laid with 2-8 deep-slotted chip breaker (11); Deep-slotted chip breaker (11) on deep-slotted chip breaker (9) on the floating bushing outer rim (7) and the floating bushing inner edge (8) is along circumferential interlaced arrangement; Each deep-slotted chip breaker is inlayed a needle roller (10) in (9,11), and the diameter of needle roller (10) is identical.