37results about How to "Reduce axial friction" patented technology

A support ring (1) for rolling bearings (11), especially for rolling bearings applied to rotors with very high rotation speed, such as rotors of rotary vacuum pumps, the ring comprising a pair of concentric cylindrical shells (3, 5) connected together by a plurality of oblique radial plates (9), at least one of said shells (3, 5) being circumferentially broken so as to define a plurality of shoes (7), each shoe being connected to at least one of the radial plates (9) in such a manner as to define shoe portions or arcs (A1, A2) of different length, wherein the plates (9) are resilient and allow for the radial displacement of the shoes (7) so as to restrain vibrations of the rotating portion.

The invention provides an automatic reactive torque balancing device for a screw drill, a drilling pipe string and a method. The device comprises an upper joint, a core tube, a lower joint and an automatic balancing component, wherein an inner cavity of the core tube communicates with the downstream screw drill, so that the drilling fluid from the inner cavity of the upper joint can flow to the screw drill through the inner cavity of the core tube in order to enable the screw drill to drill; the lower joint is fixedly arranged at the lower end of the core tube; the automatic balancing assemblyis arranged between the outer wall of the core tube and the inner wall of the upper joint, and the automatic balancing component is driven by the liquid pressure generated by a part of the drilling fluid flowing into the inner cavity of the upper joint, wherein when the displacement of the drilling fluid is equal to a first predetermined value, the friction torque generated between the upper joint and the core tube is equal to the reactive torque generated on a shell of the screw drill for directional drilling; and when the displacement of the drilling fluid is higher than the first preset value, the friction torque generated between the upper joint and the core tube is larger than the reactive torque generated on the shell of the screw drill, so that the core tube drives the shell of thescrew drill to rotate for composite drilling.

The invention discloses an interventional operation robot where a catheter and a guide wire are cooperatively pushed and a control method thereof and belongs to the technical field of machine manufacturing.The robot comprises a guide wire moving platform, a catheter moving platform, a guide wire operation end, a supporting guide frame, a catheter operation end, the guide wire and the catheter.The two ends of the supporting guide frame are connected with the guide wire operation end and the catheter operation end respectively.The catheter penetrates through the catheter operation end, and the guide wire is arranged in the catheter and penetrates into the guide wire operation end.Meanwhile, the invention further discloses the control method of the robot.By means of the guide wire operation end and the catheter operation end, movement of the guide wire and movement of the catheter are controlled respectively so that the catheter and the guide wire can be operated according to specific operation of a doctor, it is guaranteed that the guide wire and the catheter can be pushed cooperatively in the operation process, operation actions of the doctor can be completely simulated, and the robot has the advantages of being reasonable in structure, convenient to control and the like.

A transmission having at least one shaft, on which a guide sleeve which has a first external toothing system is arranged fixedly so as to rotate with it and at least one slider sleeve which has an internal toothing system is arranged, it being possible to adjust the slider sleeve between a disengaged position, in which the internal toothing system and a second external toothing system on a clutch element are not operatively connected, and an engaged position, in which the internal toothing system meshes with the second external toothing system. The internal toothing system and / or the first external toothing system are / is configured in such a way that there is merely punctiform contact between them in the engaged position. As a result, in particular, an undesired gear disengagement can be suppressed.

The invention relates to a centralizer with self-adaptive variable diameter used in the field of oil and gas well engineering. It solves the problems of poor centering of the drill string and high frictional resistance of the drill string. The technical solution is: the upper end of the stator shell is connected with the lower end of the upper joint with screws, and the lower end of the stator shell is connected with the upper end of the connecting cylinder with a thread; the rubber stator is fixed in the inner cavity of the stator shell; the screw rotor is placed in the inner cavity of the rubber stator, and the bearing a is installed in the screw. The upper end of the outer circle of the rotor; the transmission screw is placed in the inner cavity of the connecting cylinder, and the transmission screw rotates flexibly in the inner cavity of the connecting cylinder; the upper end of the lower joint is connected with the lower end of the connecting cylinder with screws; the lower end of the roller and the support arm a is hinged, and the roller and the support arm b The lower end is hinged. The present invention can realize the function of effectively changing the diameter in the downhole, the roller and the well wall are fully attached, and the drill string is well centered; the roller and the well wall are purely rolling, the axial friction between the drill string and the well wall is small, and the drill string is fed convenient.

The present invention proposes a kind of anti-twist automatic balance, drilling pipe string and method for screw drilling tools. The device includes an upper sub; The drilling fluid in the inner cavity can flow to the screw drilling tool through the inner cavity of the core barrel to make the screw drilling tool drill; the lower joint fixed at the lower end of the core barrel; the lower joint arranged between the outer wall of the core barrel and the inner wall of the upper joint an automatic balancing assembly driven by hydraulic pressure generated by a portion of the drilling fluid flowing through the inner cavity of the upper sub, wherein friction occurs between the upper sub and the core barrel when the displacement of the drilling fluid is equal to a first predetermined value The torque is equal to the reaction torque generated on the casing of the screw drilling tool for directional drilling. When the drilling fluid displacement is higher than the first predetermined value, the friction torque generated between the upper joint and the core barrel is greater than that on the casing of the screw drilling tool. The generated reaction torque makes the core barrel drive the casing of the screw drilling tool to rotate for compound drilling.

The invention relates to a reciprocating type low-pressure and high-frequency hydraulic power pulse vibrator and belongs to the field of vibration or oscillation method well drilling. The reciprocating type low-pressure and high-frequency hydraulic power pulse vibrator is composed of a vibration short joint and a power short joint. The vibration short joint is formed in the manner that a spline core shaft is inserted in a spline outer cylinder and a piston outer cylinder, and a disc spring is installed in the circular clearance between the middle portion of the spline core shaft and the pistonouter cylinder. The lower end of the spline core shaft is fixedly connected with a piston inner cylinder. A piston I, a piston II and a piston III are sequentially fixed to the piston inner cylinderfrom top to bottom, and an isolation ring I and an isolation ring II are fixed to the inner surfaces of the parts, between the piston II and the piston II and between the piston II and the piston III,of the piston outer cylinder correspondingly. A spiral worm is arranged in a stator sleeve in the axial direction, the lower end of the spiral worm abuts against a disc support, and a connecting rodhinged to the lower end face of the spiral worm is hinged to the center position of the upper end of a vibrator valve cone which is arranged in the stator sleeve in a clearance fit manner. By means ofthe reciprocating type low-pressure and high-frequency hydraulic power pulse vibrator, the pressure loss of the tool can be reduced by 45%, and meanwhile the problems of motor backing pressure, drillhead damage, drilling tool clamping, torque fluctuation, drilling tool fatigue and the like are solved.

The invention relates to a motor assembly and a location and installation method thereof. The motor assembly comprises a motor and a gear box connected with the motor, wherein, the motor comprises a motor shell, an armature shaft arranged in the motor shell, a push stopping plate arranged at the bottom of the motor shell and a straight bearing arranged on the push stopping plate; the gear box comprises an output gear shaft, a drive disk which drives the output gear shaft to rotate, a gear, a butter cushion arranged in the inner cavity of the gear, a straight bearing assembly and a supporting seat provided with a bearing; the push stopping plate and the supporting seat are respectively provided with a spherical surface; the armature shaft passes through the straight bearing, the straight bearing assembly and the inner hole of the bearing in the supporting seat in sequence, and the two end surfaces of the push stopping plate are respectively contacted with the spherical surfaces of the push stopping plate and the supporting seat; the armature shaft is provided with a worm and is provided with a commutator; the worm is positioned between the straight bearing assembly and the supporting seat; the worm drives the gear in the gear box to rotate along the rotation of the armature shaft. The invention can reduce string vibration of motor output shaft at rating load, lower the noise ofthe motor, and improve output efficiency of the motor.

The invention aims at designing rotors of a novel structure. Rectangular open hole structures are arranged on the surfaces of blades of the rotors; spiral small blade structures opposite to the overall direction of the blades are arranged at rectangular open holes; and meanwhile, magnets are attached to the two ends of a hollow shaft of each rotor. According to the rotors of the structure, the frictional resistance between the adjacent rotors is obviously reduced, and the fluid resistance is reduced; meanwhile, the strengthened heat transfer performance and the self-cleaning performance of the rotors are not reduced; and the strengthened heat exchange performance and the descaling performance of the rotors can be further improved.

The invention discloses a compound vibrating well-drilling tool which comprises a sleeve, a vibrating short joint, a vibrating short joint chuck, a screw motor, a conversion short joint connected with the lower end of the screw motor, an annular disc sleeved at the upper end of the conversion short joint, a hydraulic cylinder installed at the lower end of the conversion short joint, an impact short joint arranged in an inner cavity of the hydraulic cylinder and a torque transmitting short joint, wherein the vibrating short joint, the vibrating short joint chuck, the screw motor, the conversion short joint, the annular disc, the hydraulic cylinder, the impact short joint and the torque transmitting short joint are arranged in sequence from top to bottom. The well-drilling tool can be installed at different positions in a well-drilling column, the drilling column generate axial and circumferential high frequency compound vibration through the tool, and phenomena including 'pulling press' and 'stick slip' in the large-inclination well drilling process are eliminated, thereby remarkably improving mechanical drilling speed, prolonging the service life of a drill bit and reducing well-drilling cost.