CN201475187U - Sealed universal shaft - Google Patents

Sealed universal shaft Download PDF

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Publication number
CN201475187U
CN201475187U CN2009202278177U CN200920227817U CN201475187U CN 201475187 U CN201475187 U CN 201475187U CN 2009202278177 U CN2009202278177 U CN 2009202278177U CN 200920227817 U CN200920227817 U CN 200920227817U CN 201475187 U CN201475187 U CN 201475187U
Authority
CN
China
Prior art keywords
spherical
ball pivot
universal shaft
sphere
sealed universal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
CN2009202278177U
Other languages
Chinese (zh)
Inventor
张小俊
程永
常永忠
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sinopec Oilfield Equipment Corp
Original Assignee
Kingdream PLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kingdream PLC filed Critical Kingdream PLC
Priority to CN2009202278177U priority Critical patent/CN201475187U/en
Application granted granted Critical
Publication of CN201475187U publication Critical patent/CN201475187U/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

The utility model relates to a sealed universal shaft which is applicable to the field of petroleum and natural gas well drilling and is matched with a screw rod drilling tool for use. The sealed universal shaft comprises a middle shaft. Inner spherical hinges are arranged at both ends of the middle shaft and are matched with an outer spherical hinge. The sealed universal shaft is characterized in that spherical surfaces on the top part of the inner spherical hinges are matched with an axial spherical seat in hole cavity of the outer spherical hinge through support balls, a sealing device is arranged between the outer end of the hole cavity of the outer spherical hinge and the middle shaft and comprises a spherical surface end cover arranged at the outer end of the hole cavity of the outer spherical hinge, the spherical surface end cover is matched with a sealing cover arranged on the middle shaft through a sealing ring arranged on the end surface, and the spherical surface of the spherical surface end cover is concentric with the spherical surfaces of the inner spherical hinges and the spherical surface of the outer spherical hinge. The sealed universal shaft has the advantages: firstly, the inner spherical hinges and the outer spherical hinge has simple and compact structure, easy processing, and reliable working performance; secondly, the sealing surface is more reasonably designed so as to improve the sealing performance and prolong the service life of the universal shaft; and thirdly, a pressure balancing device is arranged, and therefore, the inside pressure and outside pressure of a sealing cavity are balanced, and the sealing performance is better.

Description

A kind of sealed universal shaft
Technical field
The utility model relates to a kind of sealed universal shaft that is applicable to that oil, gas drilling field and helicoid hydraulic motor configuration are used, and especially is fit to do with air, foam the under balance pressure drilling field of circulatory mediator.
Background technique
In petroleum production and well workover, mud motor particularly helicoid hydraulic motor application more and more widely.Helicoid hydraulic motor comprises by-pass valve assembly, motor assembly, cardan shaft assembly and driving-shaft assembly, various piece connects respectively from top to bottom successively, wherein the upper end of cardan shaft is connected with motor rotor, the lower end is connected with transmission shaft, its effect is the dead axle motion that the planetary motion of motor rotor is converted into transmission shaft, and moment of torsion and rotating speed that motor is produced pass to drill bit stably.As seen, the cardan shaft assembly is the very crucial parts of helicoid hydraulic motor, and its structural behaviour is directly connected to the drilling efficiency and the working life of helicoid hydraulic motor.
The cardan shaft of existing helicoid hydraulic motor mainly contains the spherical tooth type universal axle, and as shown in Figure 1, its structure is: tool joint pin 1, ectosphere tooth coupling shaft 2, bulb lid 3, endosphere tooth jack shaft 4, locking ball 5, seal ring 6, oil hole 7 and endosphere toe joint head 8.Tool joint pin and ectosphere tooth coupling shaft are fixed together, and around the locking ball swing, so just can transmit axial force by locking ball; Ectosphere tooth coupling shaft and endosphere tooth jack shaft have so just been realized the axial force of cardan shaft and the transmission of moment of torsion, and can have been realized the swing of tool joint pin and endosphere toe joint head by the engagement transmitting torque between the tooth.The shortcoming of spherical tooth type universal axle is: 1, sealing surface and locking ball decentraction, at joint and ectosphere tooth coupling shaft in the locking ball swing, the gap length of sealing surface can change along with swing, influences sealing effect, so that cause corrosion and damage to locking ball and ball tooth; 2, ball tooth processing difficulties is difficult to reach machining accuracy.
Summary of the invention
Technical problem to be solved in the utility model is the deficiency that exists at above-mentioned prior art, provide a kind of good seal performance, simple and compact for structure, transmitting torque big, the sealed universal shaft of long service life.
The utility model is that the technological scheme that problem adopted of the above-mentioned proposition of solution is: comprise jack shaft, ball pivot and outer ball pivot phase configuration in the two ends of jack shaft are provided with, its difference is that described interior ball pivot top sphere is by the axial ball seat phase configuration in fulcrum ball and the ectosphere fraising chamber, between the vestibule outer end of ball pivot and the jack shaft seal arrangement is set outside, described seal arrangement comprises the sphere end cap that is installed in ectosphere fraising outer end, chamber, the seal ring of sphere end cap by the end face setting and the sealing cover phase configuration that is installed on the jack shaft, and the sphere of sphere end cap with in, the sphere of outer ball pivot is concentric.
Press such scheme, the termination, two ends of described interior ball pivot is positive 4~6 face chamber phase configuration of positive 4~6 bodies and outer ball pivot and keeps the gap.
Press such scheme, each face of positive 4~6 bodies of described interior knuckle joint end is flat face or arc surface.
Press such scheme, described interior knuckle joint end is positive 4 bodies.
Press such scheme, the gap that the termination of described interior ball pivot and ectosphere fraising chamber keep is 2~10 millimeters, and the relative pendulum angle of jack shaft is 0~5 degree.
Press such scheme, the pressure equaliser that the laterally disposed and ectosphere of ball pivot fraising chamber is conducted outside described.
The beneficial effects of the utility model are: 1, inside and outside ball pivot is not only simple and compact for structure, and is easy to processing, reliable working performance; 2, the setting of sealing surface is more reasonable, thereby has improved sealability, has prolonged the working life of cardan shaft; 3, pressure equaliser is set, makes the Seal cage internal and external pressure balance, sealability is better.
Description of drawings
Fig. 1 is the front view of existing spherical tooth type universal axle.
Fig. 2 is an embodiment's of the utility model a positive view.
Fig. 3 is the A-A sectional view among Fig. 2.
Embodiment
Further specify embodiment of the present utility model below in conjunction with accompanying drawing.As Fig. 2, shown in 3, comprise jack shaft, jack shaft can be by last, link in the middle of following two axles and form, ball pivot and outer ball pivot 12 phase configuration in the two ends of jack shaft are provided with, ball pivot top end face is provided with concave spherical surface in described, concave spherical surface is by axial ball seat 9 phase configuration of fulcrum ball 13 with outer ball pivot, the cross section, termination of ball pivot is positive 4 bodies in described, 4 faces (axially) are arc surface, with the positive 4 face chamber phase configuration of outer ball pivot and keep the gap, the gap that keeps is 3~6 millimeters, axially ball seat 9 is installed in the bottom in the outer ball pivot cavity, and the external end head of outer ball pivot is provided with the coupling cone screw thread, between the vestibule outer end of ball pivot and the jack shaft seal arrangement is set outside, make the sealed two-part that are separated into of jack shaft and interior ball pivot, interior ball pivot and fulcrum ball 13 are installed in the middle part vestibule of outer ball pivot.Described seal arrangement comprises the sphere end cap 14 that is installed in ectosphere fraising outer end, chamber, with being threaded, and is sealed by seal ring 22 between sphere end cap and the outer ball pivot.The sphere end cap is by the seal ring 15 and sealing cover 16 phase configuration that are installed on the jack shaft of end face setting, and the sphere of sphere end cap is concentric with the sphere of inside and outside ball pivot.Sealing surface 20 above the spherical cap 14 and the sealing surfaces 19 above the sealing cover 16 are processed into the concentric spherical of fulcrum ball 13, in last ball pivot 17, down in ball pivot 18 and sealing cover 16 when fulcrum ball is swung, gap length between sealing surface 19 and the sealing surface 20 equates all the time, seal ring between the sealing surface can not be subjected to the influence that inside and outside ball pivot swings back and forth, thereby improves sealability.In addition, for reducing inside and outside differential pressure, the pressure equaliser that the laterally disposed and ectosphere of ball pivot fraising chamber is conducted outside described, pressure equaliser comprise the equalizing orifice 21 that is connected with ectosphere fraising chamber, install rubber lubricating cup 10 in the equalizing orifice, and fixing by hollow nut 11.Inject lubricant oil or fat by pressure compensation opening 21, annotated the back with the stifled upper pressure balance hole of rubber lubricating cup, tighten with hollow nut, lubricant oil or lubricating grease just are sealed in the Seal cage that is surrounded by outer ball pivot, sphere end cap, interior ball pivot etc. like this.When the pressure outside the Seal cage is high, the rubber lubricating cup can produce resiliently deformable external pressure is passed to Seal cage, makes the Seal cage internal and external pressure balance, thereby improves sealability, guarantee that engagement pair is in the good lubrication environment, prolong the working life of cardan shaft.

Claims (8)

1. sealed universal shaft, comprise jack shaft, ball pivot and outer ball pivot phase configuration in the two ends of jack shaft are provided with, it is characterized in that described interior ball pivot top sphere is by the axial ball seat phase configuration in fulcrum ball and the ectosphere fraising chamber, between the vestibule outer end of ball pivot and the jack shaft seal arrangement is set outside, described seal arrangement comprises the sphere end cap that is installed in ectosphere fraising outer end, chamber, the seal ring that passes through the end face setting of sphere end cap and the sealing cover phase configuration that is installed on the jack shaft, and the sphere of sphere end cap is concentric with the sphere of inside and outside ball pivot.
2. sealed universal shaft according to claim 1 is characterized in that: the termination, two ends of ball pivot is positive 4~6 face chamber phase configuration of positive 4~6 bodies and outer ball pivot and keeps the gap in described.
3. sealed universal shaft according to claim 2 is characterized in that: each face of positive 4~6 bodies of knuckle joint end is flat face or arc surface in described.
4. sealed universal shaft according to claim 2 is characterized in that: knuckle joint end is positive 4 bodies in described.
5. according to claim 3 or 4 described sealed universal shafts, it is characterized in that: the gap that the termination of ball pivot and ectosphere fraising chamber keeps in described is 2~10 millimeters, and the relative pendulum angle of jack shaft is 0~5 degree.
6. sealed universal shaft according to claim 1 is characterized in that: the pressure equaliser that the laterally disposed and ectosphere of ball pivot fraising chamber is conducted outside described.
7. sealed universal shaft according to claim 6 is characterized in that: described pressure equaliser comprises the equalizing orifice that is connected with ectosphere fraising chamber, installs the rubber lubricating cup in the equalizing orifice, and is fixed by hollow nut.
8. sealed universal shaft according to claim 1 is characterized in that: described sphere end cap with outside between the ball pivot with being threaded, and seal by seal ring.
CN2009202278177U 2009-09-01 2009-09-01 Sealed universal shaft Expired - Lifetime CN201475187U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2009202278177U CN201475187U (en) 2009-09-01 2009-09-01 Sealed universal shaft

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2009202278177U CN201475187U (en) 2009-09-01 2009-09-01 Sealed universal shaft

Publications (1)

Publication Number Publication Date
CN201475187U true CN201475187U (en) 2010-05-19

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ID=42411434

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2009202278177U Expired - Lifetime CN201475187U (en) 2009-09-01 2009-09-01 Sealed universal shaft

Country Status (1)

Country Link
CN (1) CN201475187U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104499957A (en) * 2014-12-18 2015-04-08 山西风雷钻具有限公司 Universal joint for screw drilling tools
CN105927674A (en) * 2016-06-22 2016-09-07 朱德伟 Spherical hinge transmission shaft

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104499957A (en) * 2014-12-18 2015-04-08 山西风雷钻具有限公司 Universal joint for screw drilling tools
CN105927674A (en) * 2016-06-22 2016-09-07 朱德伟 Spherical hinge transmission shaft
CN105927674B (en) * 2016-06-22 2019-01-25 青岛极致创新科技有限公司 A kind of flexural pivot transmission shaft

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Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
AV01 Patent right actively abandoned

Granted publication date: 20100519

Effective date of abandoning: 20090901