168results about How to "Reduced concentricity requirements" patented technology

An efficient grinding device of a double autorotation grinding disc of a high precision ball comprises a frame, a grinding disc device installed on the frame and a load pressure device; the grinding disc device comprises an upper grinding disc; the load pressure device is installed at the upper end of the upper grinding disc; the efficient double autorotation V-shaped groove grinding device of the high precision ball further comprises an inner disc of a lower grinding disc and an outer disc of the lower grinding disc; the outer disc and the inner disc of the lower grinding disc are coaxially arranged; the inner disc of the lower grinding disc is inserted in the outer disc of the lower grinding disc; a conical grinding surface on the outer side of the inner disc of the lower grinding disc and a conical grinding surface on the inner side of the outer disc of the lower grinding disc form a V-shaped groove structure; the outer disc of the lower grinding disc is fixedly installed on the frame; the upper grinding disc is installed on a rotating shaft; the rotating shaft is connected with a drive motor of the upper grinding disc; the inner disc of the lower grinding disc is installed on a main shaft; and the main shaft is connected with a drive motor of the lower grinding disc. The efficient grinding device of the double autorotation grinding disc of the high precision ball has the advantages of simple structure, low processing cost, higher processing precision and processing efficiency.

The invention discloses a compact type mechanical lifting mechanism for an assembling line. The compact type mechanical lifting mechanism for the assembling line is characterized by comprising a base, a lifting platform, a jacking screw, a worm wheel and a worm. The worm is horizontally connected to the base in a coupling mode, the worm wheel is vertically connected to the base in a coupling mode, an internal screw hole is formed in the worm wheel, the jacking screw is in threaded connection with the internal screw hole, the lifting platform is fixedly connected with the upper end of the jacking screw, a guide column is fixedly arranged on the lifting platform, a guide sleeve is fixedly arranged on the base, the guide column is matched with the guide sleeve in a vertical sliding mode, and one end of the worm is connected with a rotary drive power source. Compared with a traditional lifting mechanism, the compact type mechanical lifting mechanism for the assembling line has the advantages of being small in needed installation space, compact in structure, and accurate in control; due to the fact that the lifting platform is fixedly connected with the upper end of the jacking screw through connecting screws arranged side by side, the effect of fixing the lifting platform and preventing the jacking screw from being rotated is achieved, and even when loading weight is overloaded, the connecting screws still play a role as safety pins in preventing the worm wheel from being damaged.

The invention relates to a permanent magnet coupling mechanism between shafts. The permanent magnet coupling mechanism between the shafts is used for transmitting torque between the two rotating shafts. The mechanism comprises a permanent magnet rotor and a conductor rotor, wherein a conical air gap is formed between the permanent rotor and the conductor rotor. A permanent magnet on the permanent magnet rotor comprises main magnets and auxiliary magnets. The multiple main magnets are circumferentially distributed. A magnetizer made of permeability magnetic materials is arranged between every two adjacent main magnets. One auxiliary magnet is arranged on one side, away from the conductor rotor, of each magnetizer. The directions of the magnetic poles of the main magnets are located in the circumferential direction of the permanent magnet rotor. The directions of the magnetic poles of the adjacent main magnets are in the face-to-face direction or the back-to-back direction. The directions of the magnetic poles of the auxiliary magnets are the radial directions of the permanent magnet rotor. The directions of the magnetic poles of the adjacent auxiliary magnets are opposite. The magnetic poles of the positions of the side faces where the two main man magnets and one auxiliary magnet are contacted with the same magnetizer are respectively the same polarity. The permanent magnet coupling mechanism between the shafts is large in transmitting torque, adjustable in transmitting torque, compact in structure, convenient to install, and stable and reliable in transmission and adjustment.

The invention belongs to the technical field of chemical equipment and relates to a novel high-viscosity final polycondensation reactor. The reactor sequentially comprises a transmission end, a left end cover, a feeding port, a front drum section, a ring seat, a bearing seat, a drum middle flange, a discharging port, a rear drum section, a right end cover, mechanical seal and a supporting frame. The reactor is characterized in that two stirring devices different in rotation speed are arranged in a drum, one of the stirring devices is a cage stirrer arranged in the front drum section, and the other stirring device is a disc stirrer with an inclination scraper and is arranged in the rear drum section. Two half pad bearings are arranged in the middle of the drum to support the two stirring devices, and reinforcement rings are arranged on the drum. The novel high-viscosity final polycondensation reactor has the advantage that by integration of an original final polycondensation reactor and a tackifying reactor, production cost reduction, production efficiency improvement, energy saving, environment friendliness and high market competitiveness are realized.

The invention discloses an optical fiber untwisting device. An optical fiber guided out of an optical fiber traction assembly passes through an optical fiber twisting detecting unit, an optical fiber winding and clamping assembly and an optical fiber untwisting assembly which are arranged in sequence and is wound around the interior a fiber winding disc in the optical fiber untwisting assembly. The optical fiber untwisting assembly comprises a rotary driving motor, a transmission mechanism and the fiber winding disc. The rotary driving motor is connected with an angle sensor and rotates according to a feedback signal given by the angle sensor. The optical fiber winding and clamping assembly is driven by the transmission mechanism to rotate synchronously and connected with the transmission mechanism through a flange face. The optical untwisting device can overall untwist the whole long optical fiber, torsional stress existing in the optical fiber is reduced, the magnetic sensitivity problem of a fiber-optic gyroscope is solved, and the precision of the fiber-optic gyroscope is improved. In addition, by means of the optical fiber untwisting technology, the influence of eccentricity of an insulated single wire on characteristic impedance can be eliminated, and the requirement for the concentricity of the insulated single wire can be reduced.

The invention discloses a leakage-free seal-ring-free two-way controllable magnetorheological damper which comprises a cylinder body, a piston and a piston rod, wherein the left end and the right end of the cylinder body are respectively connected with a left corrugated pipe and a right corrugated pipe hermetically, the left corrugated pipe is hermetically connected with a left end cover, the left end cover and a right end cover are hermetically connected with the piston rod, the left corrugated pipe and the right corrugated pipe are hermetically connected with the left end cover and the right end cover, and the centers of the left end cover and the right end cover are hermetically connected with the piston rod; a communicating pipe is arranged on the cylinder body; a left circular coil and a right circular coil are fixedly connected inside the cylinder body, and gaps between the inner holes of the circular coils and the piston rod form a damping channel; and a left one-way valve and a right one-way valve are arranged on the communicating pipe, and the piston rod is located between the left one-way valve and the right one-way valve. In the invention, the corrugated pipes are used as sealing elements, leakage caused by wearing between the piston rod and a seal ring is avoided, and the corrugated pipes do not bear working pressure. The damper can not leak within the service life of the corrugated pipes.

An apparatus for telemetering a downhole parameter from a well. The apparatus comprises a housing having a bore. The apparatus further comprises an annular main valve with an enlarged end positioned within the bore, with the main valve having a center of axis. A restrictor is concentrically disposed within the bore, the restrictor configured to define an annular passage with the main valve. The apparatus also includes: a pressure device for supplying hydraulic pressure to the main valve; a control valve, operatively associated with the restrictor member, for controlling pressure to the main valve; and a solenoid control valve assembly for activating the control valve. In one preferred embodiment, the solenoid control valve assembly comprises a controller for emitting an electrical signal, a coil that receives the electrical signal and generates a magnetic field, a solenoid static pole receptive to the generated magnetic field, and a solenoid moving pole responsive to the magnetic field so that the solenoid moving pole moves in a direction towards the solenoid static pole. A method for communicating a downhole parameter is also disclosed.

The invention provides a motorcycle bottom fork, comprising a left frame rod, a right frame rod and a connecting rod which is arranged between the left frame rod and the right frame rod; the front ends of the left frame rod and the right frame rod are respectively provided with a sleeve used for realizing the axial connection between motorcycle frames; the motorcycle bottom fork is characterized in that the sleeve is internally provided with a ball bearing which consists of a ball sleeve and a steel ball with the position limited in the ball sleeve; the steel ball is provided with a central shaft hole. The motorcycle bottom fork improves the driving comfortableness of the whole motorcycle, has long service life, and suitably reduces the coaxiality requirement of the left sleeve and the right sleeve which are arranged at the front end of the bottom fork, thus being beneficial to reducing the manufacture cost.

The invention provides a matched power takeoff for a power transmission system with an automatic transmission. The matched power takeoff comprises a casing; a hollow cavity is formed in the inner surface of the casing; an input shaft and an output shaft are coaxially arranged in the hollow cavity of the casing; the part, extending out of the casing, of the input shaft is connected with a power source; the part, extending out of the casing, of the output shaft is connected with an output accessory device; the input shaft and the output shaft are connected and separated through the combination and separation of a clutch; an electromagnetic valve is powered on, then the pressure oil pushes a piston to tightly compress the clutch, and the clutch is connected; the electromagnetic valve is powered off, the pressure of the pressure oil disappears, and the clutch is separated under the action of a spring; when the clutch is connected, the torque and the power of the power source goes to the output shaft through the input shaft and the clutch, and the connected accessory device is driven, so that the basic functions of the power takeoff are realized; the connection and the separation of theinput shaft and the output shaft are realized without stopping rotation of the input shaft or an output device, and meanwhile, a hydraulic oil source of the automatic transmission can be also conveniently used for controlling, lubricating and cooling.

The invention provides a torque extraction device which comprises a shell. A cavity is formed in the inner surface of the shell. An input shaft and an output shaft are coaxially arranged in the cavity of the shell. The portion, extending out of the shell, of the input shaft is connected with a power source. The portion, extending out of the shell, of the output shaft is connected with an output auxiliary device. The input shaft and the output shaft are combined and separated through engagement and disengagement of a clutch. An electromagnetic valve is powered on, a piston is pushed by pressure oil to press the clutch, and the clutch is engaged; the electromagnetic valve is powered off, pressure of the pressure oil disappears, and under the effect of a spring, the clutch is disengaged. When the clutch is engaged, the torque and the power from the power source are transmitted to the output shaft through the input shaft and the clutch, the connected auxiliary device is driven, and therefore the basic functions of the torque extraction device are achieved. The input shaft and the output shaft can be combined and separated without the requirement for stopping rotation of the input shaft or an output device. Meanwhile, a hydraulic oil source brought by an automatic transmission can be conveniently used for control, lubrication and cooling.

The invention discloses an inner armature type high precision positioning electromagnet which comprises a shell, an armature, a coil, an end cover and a positioning shaft. One end of the shell is sealed through the end cover, three supporting assemblies are arranged at the end, far away from the end cover, of the shell, bearings of the three supporting assemblies are all tightly attached to the positioning shaft, and the positioning shaft can move freely in the axial direction of the positioning shaft. Two supporting assemblies are fixed supporting assemblies, another supporting assembly is a movable supporting assembly, and a kidney-shaped hole is formed in a supporting block of the movable supporting assembly in the length direction of the supporting block. A screw sequentially penetrates through a pressing plate and the kidney-shaped hole and then is connected with the shell. A compressed spring is arranged at the end, far away from the positioning shaft, of the movable supporting assembly, one end of the compressed spring is fixedly connected with the shell, and the other end of the compressed spring is tightly pressed on the supporting block of the movable supporting assembly. By means of the inner armature type high precision positioning electromagnet, gap variation caused by temperature variation can be compensated automatically, and high positional accuracy and low temperature drift are achieved.

The invention discloses a parallel-connection-type mid-high altitude wind energy ground generator set. The parallel-connection-type mid-high altitude wind energy ground generator set comprises at least one generator (1), a plurality of power winches (4) and a plurality of cable accommodation winches (5); the power winches (4) drive the generator (1) to generate power through cables; the cable accommodation winches (5) are used for reeling the cables passing through the power winches (4); and the power winches (4) are arranged parallel to the generator (1). Compared with the prior art, the parallel-connection-type mid-high altitude wind energy ground generator set has the advantages that the requirement on the coaxiality of spindles is not high, so that the assembly difficulty is low; the winches in the generator set do not affect one another, and can be separately adjusted for working; with the same configuration, the power generation efficiency is higher; the utilization rate of the generator set is higher; and the cable folding descending of an umbrella-shaped wind energy system can be realized through a reversing gear box, and a descending motor does not to be additionally arranged, so that the generator set is simpler in structure.

The invention relates to an automobile seat angle adjuster assembly. The automobile seat angle adjuster assembly comprises a driven-side angle adjuster, a linkage rod and a driving-side angle adjuster. The left end of the linkage rod is connected to a rotating shaft of the driven-side angle adjuster in an inserted mode, and the right end of the linkage rod is connected to a rotating shaft of the driving-side angle adjuster in an inserted mode. The right end portion of the linkage rod is fixedly sleeved with a driving disc. Driving groove holes are formed in the edge of the driving disc in the circumferential direction. The rotating shaft of the driving-side angle adjuster is fixedly sleeved with a rotating disc. Shifting blocks are arranged on the outer periphery of the rotating disc and inserted into the groove holes in the driving disc. The installation structure can lower the requirement for precision of a seat frame and avoids the problems that seat backrest operating force is large and adjustment can not be carried out smoothly.

The invention provides a dust recovery device. According to the device, the problem of extremely low cleaning efficiency as dust on the inner wall of the exiting dust absorption tower is not cleaned easily is effectively solved. The dust recovery device comprises a tower body, wherein a suction fan is arranged at the upper part of the tower body; a water spray plate is arranged below the suction fan; the lower end of the water spray plate is connected with a plurality of water spray nozzles; the water spray nozzles are used for supplying water through a water inlet pipe at the right end of the tower body; an air inlet is designed on the left side of the tower body; a dust discharge hole is arranged below the air inlet; a rotating shaft is arranged in the tower body; a sun wheel is mounted on the rotating shaft; a plurality of planet wheels are meshed on the outer side of the sun wheel; a first planet frame is arranged above the planet wheels and is rotatably fixed on the rotating shaft; a planet shaft is rotatably fixed on the first planet frame; the planet shaft penetrates through the planet wheels; a plurality of rolling brush units connected with one another in sequence are mounted on the planet shaft. The water spray nozzles are fixed on the water spray plate, and the quantity of the water spray nozzles is increased, so that the spray range is enlarged; a plurality of rolling brushes are made into a full circle, so that the cleaning efficiency of the dust on the inner wall of the tower body is improved.

The invention relates to a mechanism transmission device, in particular to a permanent-magnet coupling mechanism between shafts. The permanent-magnet coupling mechanism is used for transmitting torque between two rotation shafts and comprises a permanent-magnet rotor and a conductor rotor which are arranged coaxially. Permanent-magnets and conductors are respectively distributed on the permanent-magnet rotor and the conductor rotor, and a conical air gap is formed between the permanent-magnet rotor and the conductor rotor. The permanent-magnets on the permanent-magnet rotor are distributed circumferentially, and magnetizers made of magnetic materials are mounted between the adjacent permanent-magnets. Directions of magnetic poles of the permanent-magnets extend along the circumference of the permanent-magnet rotor, and directions of the magnetic poles of the adjacent permanent-magnets are opposite or reversed. The permanent-magnet coupling mechanism is capable of transmitting high torque adjustably, and is compact in structure, convenient to mount and stable and reliable in transmission and adjustment.

The invention relates to a horizontal movement device for a hoisting machine. The horizontal movement device comprises a first guide rail pair arranged at the left side of the hoisting machine and a second guide rail pair arranged at the right side of the hoisting machine; the horizontal movement device is characterized in that the first guide rail pair comprises a first guide rail arranged on the ground and a plurality of first rolling wheels which are pivoted at the left side of a rack; an annular groove which is blocked on the first guide rail is arranged in the external surface of each first rolling wheel; each first rolling wheel is blocked on the first guide rail and moves along the direction of the first guide rail; the second guide rail pair comprises a second guide rail arranged on the ground and a plurality of second rolling wheels which are pivoted at the right side of the rack; the second guide rail is parallel to the first guide rail; the second guide rail is a plane guide rail and is provided with a supporting surface extending along the direction of the second guide rail; and each second rolling wheel is pressed on the supporting surface in a rolling way. According to the horizontal movement device provided by the invention, the requirements on the center distance of the guide rails and the precision of the guide rails are low; the requirement on the coaxial precision of the rolling wheels is low; the installation and adjustment are convenient, and the running of the device is safe and reliable.

The invention relates to the field of above-water maintenance of warships, in particular to a lifting buoyant platform for above-water maintenance of a warship. The lifting buoyant platform comprisesa maintenance workshop, wherein a disconnected passage is arranged in the middle of the maintenance workshop; two portal frames are arranged in the front of the passage and in the back of the passagerespectively, the lifting buoyant platform is arranged between the two portal frames, and the top of each portal frame is provided with two sets of winding devices; the two ends of the lifting buoyantplatform are provided with buoyancy tanks respectively, sealed hollow beams are arranged between the two buoyancy tanks, a porous flat plate is arranged on the hollow beams, the buoyancy tanks are sealed hollow box bodies with trapezoid shapes, and mounting openings are formed in the installation positions of the hollow beams of the box bodies; and pulley blocks which are in transmission connection with the winding devices are arranged at the four corners of the lifting buoyant platform correspondingly. The lifting buoyant platform is stable and reliable in use, and is suitable for above-water maintenance of warships.

The invention discloses a tail gas post-treatment seal. The tail gas post-treatment seal comprises an outer housing, a first baffle plate and a second baffle plate which are positioned in the outer housing and are arranged in a spaced mode, a first post-treatment carrier assembly positioned in the outer housing, a second post-treatment carrier assembly, a third post-treatment carrier assembly anda mixing tube assembly which is arranged between the second post-treatment carrier assembly and the third post-treatment carrier assembly in a communication mode, and further comprises a first connecting cavity positioned on the fourth side surface of the second baffle plate and a second connecting cavity positioned between the first baffle plate and the second baffle plate; the mixing tube assembly comprises a tail end extending into the second connecting cavity, and the mixing tube assembly is fixed to the second baffle plate; and a gap is formed between the tail end and the first baffle plate. In this way, the tail gas post-treatment seal reduces coaxiality requirements while the mixing tube assembly is assembled, cancels a welding process, and improves assembly convenience of the tailgas post-treatment seal.

The invention discloses a cell enriching system and a cell enriching method. The cell enriching system comprises a sample bottle, a loading mechanism, a uniformly mixing mechanism, a concentrating anduniformly mixing mechanism and a controller, wherein the loading mechanism can convey the sample bottle; the uniformly mixing mechanism can perform a first uniformly mixing operation on the sample bottle; the concentrating and uniformly mixing mechanism can pierce the bottom of the bottle, and perform sucking and reverse blowing operations on the sample bottle; the controller controls the loadingmechanism to convey the sample bottle to a uniformly mixing position, and then the uniformly mixing mechanism performs the first uniformly mixing operation; after the controller controls the loadingmechanism to convey the sample bottle to a concentrating position, the controller controls the concentrating and uniformly mixing mechanism to pierce the bottom of the bottle to enter a second cavityand repeatedly perform the sucking and reverse blowing operations. The cell enriching system provided by the invention achieves cell concentration by performing the sucking and reverse blowing operations, so that a filter device of the sample bottle and a concentrating needle can be effectively prevented from being blocked, cell superposition can be effectively reduced while cell concentration isaccelerated, and thus the cell enriching quality is improved.