Sealed universal shaft
A cardan shaft and sealing technology, applied in the direction of couplings, elastic couplings, mechanical equipment, etc., can solve problems such as difficult to achieve machining accuracy, affect sealing effect, corrosion of positioning steel balls, etc., and achieve easy processing, Extended service life and good sealing performance
Active Publication Date: 2010-02-10
KINGDREAM PLC CO +1
View PDF0 Cites 5 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
The disadvantages of ball tooth type cardan shaft are: 1. The sealing surface is not concentric with the positioning steel ball. When the joint and the outer ball tooth connecting shaft swing around the positioning steel ball, the gap between the sealing surface will change with the swing, affecting The sealing effect will cause corrosion and damage to the positioning steel ball and the button; 2. The button is difficult to process and it is difficult to achieve the machining accuracy
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0015] Further illustrate the embodiment of the present utility model below in conjunction with accompanying drawing. Such as figure 2 , 3 As shown, including the intermediate shaft, the intermediate shaft can be formed by connecting the upper and lower shafts in the middle, and the two ends of the intermediate shaft are provided with inner spherical hinges and outer spherical hinges 12. The top end surface of the inner spherical hinge is provided with Concave spherical surface, the concave spherical surface is configured with the axial ball seat 9 of the outer spherical hinge through the support ball 13, the end section of the inner spherical hinge is a regular tetrahedron, and the four surfaces (axial) are arc surfaces, and The front 4 faces of the outer spherical hinge are arranged with the cavities and keep a gap of 3 to 6 mm. The axial ball seat 9 is installed at the bottom of the cavity of the outer spherical hinge, and the outer end of the outer spherical hinge is pro...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention relates to a sealed universal shaft which is suitable for the field of drilling oil and natural gas, is matched with a screw drill and comprises a middle shaft with an inner spherical hinge and an outer spherical hinge arranged at both ends. The sealed universal shaft is characterized in that a sphere at the top end of the inner spherical hinge is matched with an axial hall seat in an outer spherical hinge hole cavity by a supporting ball; a sealing device is arranged between the outer end of the outer spherical hinge hole cavity and the middle shaft and comprises a spherical endcover mounted at the outer end of the outer spherical hinge hole cavity; a sealing ring which is arranged by the end surface of the spherical end cover is matched with a sealing cover mounted on themiddle shaft; and the sphere of the spherical end cover is concentric with the spheres of the inner spherical hinge and the outer spherical hinge. The invention has the advantages that: (1) the innerspherical hinge and the outer spherical hinge have simple and compact structure and reliable working performance and are easy to process; (2) a sealing surface is more reasonably arranged so as to improve the sealing performance and prolong the service life of the universal shaft; and (3) a pressure-balancing device is arranged to balance pressure inside and outside the sealing cavity and have better sealing performance.
Description
technical field [0001] The invention relates to a sealed cardan shaft suitable for use in oil and natural gas drilling fields and screw drilling tools, especially suitable for underbalanced drilling fields using air and foam as circulating media. Background technique [0002] In oil extraction and workover, the application of downhole dynamic drilling tools, especially screw drilling tools, has become more and more extensive. The screw drilling tool includes a bypass valve assembly, a motor assembly, a cardan shaft assembly and a drive shaft assembly, and each part is connected sequentially from top to bottom, wherein the upper end of the cardan shaft is connected to the motor rotor, and the lower end is connected to the drive shaft The function of the connection is to convert the planetary motion of the motor rotor into the fixed-axis motion of the transmission shaft, so that the torque and speed generated by the motor can be smoothly transmitted to the drill bit. It can b...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More IPC IPC(8): F16D3/20E21B17/20
Inventor 张小俊程永常永忠
Owner KINGDREAM PLC CO