64 results about "Friction Problem" patented technology

A vertical shaft maglev wind power generator is composed of vanes, a rotary shaft, a power generator, a radial magnetic bearing, an axial TDOF magnetic bearing, an upper protection bearing, a lower protection bearing, an upper protection bearing retainer ring and a lower protection bearing retainer ring; the rotational part and the stationary part of the fan are not in mechanical contact, the mechanical friction in the fan is completely eliminated and the FDOF levitation of the fan rotor is realized. The axial magnetic bearing of the fan supplies gravity offset through 4 stator magnetic poles and the effect of a suction disc and performs axial translation and two radial rotational DOF control on the rotor; and the radial magnetic bearing finishes the two radial translation control of the fan rotor. The invention has reasonable layout of the components, completely eliminates the friction problem of the vertical shaft fan bearing, greatly reduces the starting wind speed of the wind power generator and improves the wind energy utilization rate.

The invention discloses an electromagnetic force testing device of a high-speed solenoid valve for an automobile braking system, which comprises: a fixing plate including a bottom plate and a side wall; an electromagnetic force detection part which is arranged on the bottom plate, connected with a valve core of the high-speed solenoid valve and is used for detecting the change of the electromagnetic force of the high-speed solenoid valve in real time; an air gap adjusting part which is vertically fixed on the side wall and used for adjusting an air gap between a static iron and a moving iron of the high-speed solenoid valve; a high-speed solenoid valve fixing part which is arranged above the electromagnetic force detection part and is used for fixing the whole high-speed solenoid valve toserve as a test object; and a displacement detection part which is arranged above the high-speed solenoid valve fixing part and used for detecting displacement of the valve core of the high-speed solenoid valve. The electromagnetic force testing device of the invention can realize static and dynamic test of the electromagnetic force of the high-speed solenoid valve in the automobile braking system, has good integrity by using the whole high-speed solenoid valve as the test object, avoids the friction problem of the moving iron through vertical test, and has a compact structure and high test precision.

The present invention relates to a ball valve, its valve rod and left-hand screw thread end of its uspporting shaft are respectively equipped with an upper nut and a lower nut which respectively possess a pair of symmetrical lugs, and two lugs positioned on same side of said upper nut and lower nut are respectively hinge-connected with one end of one link joint, and another end of the link joint is hinge-connected with half-valve core with spherical external surface of said side, and the upper end surface of upper nut possesses a ring groove in which can open-ended spring is fixedly mounted, a positioing pin is inserted into valve cavity, and on the positioning pin a press plate is fixedly mounted. The opening and closing processes of said valve are implemented by means of separation and contact of two semi-spherical valve cores and valve seat seal component, they do not produce friction, so that said ball valve has no leakage and its service life is long as compared with existent ball valve.

The invention relates to a cam pressing type tee ball valve, comprising a tee valve, a valve plug and a rotation driving mechanism for driving valve plug to rotate disposed in the tee valve, and a pressing mechanism disposed on the valve. The pressing mechanism comprises a pressing shaft driven by external and a pressing cam which is fixed on a stretching end of a pressing shaft inserted into the valve. A cam counter bore which is matched with the pressing cam is disposed on the valve plug. During the rotation of valve plug, the valve plug always inclines towards one side of an inlet of the valve and the sealing surfaces of the valve plug and an outlet do not contact with each other so the sliding friction problem of prior art does not exist and the service life of the valve is prolonged.

The present invention discloses HF inducing motor and its speed controller. Conducting winding is set in motor rotor and stator, and the rotor winding is connected to capacitor to form resonant loop.When HF alternate current is led into the stator winding, current will generate in the rotor by means of electric induction and electromagnetic resonance and interect with stator magnetic field to rotate motor to solve the friction problem of ultrasonic wave motor. The motor of the present invention can detect its rotation speed via stator winding. The low frequency component in winding voltage or current has frequency proportional directly with the rotation speed and is used in controlling and displaying rotation speed. The present invention also provides motor speed controller comprising simple analog and digital circuit.

The invention relates to the petroleum machinery technical field, in particular to a bailing device for a horizontal well and a bailing method using the same. The invention provides the bailing device for the horizontal well and the bailing method using the same to solve the problem of sealing property for a check valve in the prior bailing process and the problem of frictions between a pump body of a bailing pump and a bushing and between the pump body of the bailing pump and a coupling, wherein, a drainage orifice is arranged above a vertical segment of a bailing pump, a piston barrel is arranged under the drainage orifice, a piston rod inside the piston barrel is provided with an upper valve, and the lower end of the piston rod is provided with a hard piston and a soft piston; a sand blocking short circuit is arranged under the piston barrel; the front end of the horizontal segment of the bailing pump is provided with a tool for cutting and pushing sands, while the other end of the tool for cutting and pushing sands is provided with a bottom valve and a sand shovel, a valve core and a valve seat of the bottom valve are jointed through a spring; and a centralizer is arranged on the pump body of the horizontal segment of the bailing pump. The bailing device for the oil well has the advantages of excellent sealing property; small friction between the bailing pump and the bushing and between the bailing pump and the coupling; long service life; effective prevention of massive sand particles from entering inside the piston barrel; strong sand pumping property of the piston; and high work efficiency.

The present application discloses a rotating shaft assembly and electronic equipment. The rotating shaft assembly comprises a rotating shaft, a first component and a second component, wherein the rotating shaft comprises a first shaft section and a second shaft section, and the shaft diameter of the first shaft section is smaller than that of the second shaft section; the first component is sleeved on the first shaft section, and one end of the first component is abutted against the end surface of the second shaft section; the second component is sleeved on the first shaft section; a repulsivemagnetic force is formed between the first component and the second component to provide resistance when the second component rotates relative to the rotating shaft and then cause the second component to be subjected to the action of the resistance when rotating relative to the rotating shaft, so that the second component can stay at any angle in a relative rotating process relative to the rotating shaft; in addition, because the resistance against the second component when the second component rotates relative to the rotating shaft is provided by the repulsive magnetic force formed between the first component and the second component, the friction problem between the second component and the rotating shaft is also solved, and the service life of the rotating shaft is prolonged.

The invention provides a hydraulic self-sealing plunger oil pump, for thoroughly solving the friction problem between sucker rod and oil pipe, comprising plunger, pump barrel and traveling valve, where central rod sieve tube of the plunger is jacketed with a seal elastomer layer, the seal elastomer is jacketed with rigid metal ring and elastic seal ring. In the up-stroke course of the oil pump, the high pressure in the plunger acts through the seal elastomer onto the wearable elastic seal ring to reduce clearance between the seal ring and the pump barrel, strengthening seal and reducing leakage; in the down-stroke course, the pressures at two ends of the plunger are the same, the wearable seal ring contracts, increasing the clearance and reducing down-going resistance of the plunger. And the seal ring structure of the invention is applied to all hydraulic-plunger or multi-plunger pumps, having advantages of reducing the leakage of pump, raising volume of pump and efficiency of pump, etc.

The invention discloses a freeze dryer and a supporting plate feeding and discharging system thereof. The supporting plate feeding and discharging system of the freeze dryer involves supporting plates, a base and a lifting mechanism used for controlling the supporting plates to ascend and descend, wherein the base is provided with idler wheels capable of travelling on a feeding and discharging machine base, and the lifting mechanism is arranged on the base; when the supporting plates are placed on the lifting mechanism, if the lifting mechanism is in a first working state, the bottoms of the supporting plates are located at first horizontal height, and the first horizontal height is the horizontal height where the machine base upper surface of the feeding and discharging machine base is located; and if the lifting mechanism is in a second working state, the bottoms of the supporting plates are located at second horizontal height, and the second horizontal height is higher than the first horizontal height. The freeze dryer and the supporting plate feeding and discharging system thereof can solve the friction problem in the supporting plate feeding and discharging process of the freeze dryer, avoids the risk caused by friction, is beneficial to reduce the labor intensity of an operator, and can normally feed products with low-temperature feeding requirement.

The invention relates to the petroleum machinery technical field, in particular to a horizontal bailing device for an oil well and a bailing method using the same. The invention provides the horizontal bailing device for the oil well and the bailing method using the same to solve the problems of sealing property for a check valve in the prior bailing process, frictions between a pump body of a bailing pump and a bushing and between the pump body of the bailing pump and a coupling, and cleaning residual sands attached on the inner wall of the bushing, wherein, a piston rod, a drainage hole, an upper valve, a piston barrel, a hard piston, a soft piston, a desilting pipe and a tool for cutting and pushing sands are arranged in sequence from a turning position of the bailing pump to the other end of a horizontal segment inside the pump body; a sand blocking short circuit is arranged between the piston barrel and the desilting pipe, and a centralizing instrument is arranged on the pump body of the horizontal segment; and the tail end of the horizontal segment of the bailing pump is provided with a bottom valve and a sand shovel. The horizontal bailing device for the oil well has the advantages of excellent sealing property; small friction between the bailing pump and the bushing and between the bailing pump and the coupling; long service life; effective prevention of massive sand particles from entering inside the piston barrel; strong sand pumping property of the piston; and high work efficiency.

The invention relates to a high-reliability closed spool type dynamic pressure bearing. The high-reliability closed spool type dynamic pressure bearing comprises a spindle, a bearing rotor installed on the spindle in a sleeving mode, a spindle sleeve located between the spindle and the bearing rotor and thrust plates installed at the two ends of the spindle in a sleeving mode respectively. According to the dynamic pressure bearing, the spindle sleeve is additionally arranged on the spool bearing structure, the spindle sleeve is fixed to the spindle and forms a closed spool type structure withthe bearing rotor, the thrust plates each adopt a special slope structure, external air flow is pumped into an axial bearing body and a radial bearing body through the thrust plates with the special slopes, pressure distribution is formed in a bearing working clearance, the pressure in the bearing maintains the dynamic stability after the rotation speed is stable, and the bearing rigidity problemand the axial bearing body starting and stopping friction problem are solved; an axial compressing nut adopts an elastic compressing structure, and therefore it is guaranteed that the bearing axial clearance keeps stable at different temperatures; and a radial bearing friction pair adopts a boron carbide-boron carbide mode, a thrust axial friction pair adopts a boron carbide-structural steel mode,and therefore the bearing contact friction and wear problems are further solved.

The invention relates to an automobile brake clearance manual and automatic adjusting arm. The automobile brake clearance manual and automatic adjusting arm comprises a control plate, and the controlplate and a large tooth ring are fixedly connected into a whole; the large tooth ring is in engagement fit with a small gear, and an inner hole of the small gear is of a sector structure; one end of asmall shaft is of a flat square structure; the sector structure of the small gear is connected with the flat square structure of the end of the small shaft; a reset spring is arranged in the gap where the end of the small shaft is matched with the sector structure of the small gear; a one-way bearing sleeves the outer side of the small shaft, and the one-way bearing and a first helical gear are in interference fit and connected into a whole; the first helical gear is in engagement fit with a second helical gear, and the second helical gear sleeves one end of a worm shaft; and the worm shaft is inserted into an inner hole of a worm, the worm is in engagement fit with a worm gear, and an inner hole of the worm gear is connected with a cam shaft of a brake. The automobile brake clearance manual and automatic adjusting arm provided by the invention is reliable and low in cost, the drawing friction problem of a brake is solved, the automobile braking efficiency is improved, and the automobile running safety is improved.