85results about How to "Small electromagnetic force" patented technology

Provided is a complex weld method that is able to increase arc stability and to improve weld speed and work efficiency. The disclosed complex weld method generates a tungsten inert gas (TIG) arc on the side ahead of the weld direction and a metal inert gas (MIG) arc on the side behind and welds a base metal. Provided is a complex weld method characterised by a TIG current set higher than the MIG current and by an absolute value of the separation between the point of intersection of the base metal and the TIG electrode central axis and the point of intersection between the surface of the base metal and the MIG electrode central axis of 4 mm or less.

The invention relates to a non-traction type inclined elevator and a control method thereof. The inclined elevator comprises an inclined track, a support system, a driving system, a control system, weight sensors, a pedal, guiders and an inclined supporting pier. The driving system comprises two pairs of same stators and rotors. The stators are laid along the inclined track and fixed with the inclined track. The rotors are located below the stators and fixed with a support frame. The control system comprises following steps: controlling the exciting current of rotor windings through the difference between given values of resultant force and actual values detected by the weight sensors and by given values of exciting current of the rotor windings outputted by a PI regulator such that closed-loop control of resultant force is realized, wherein the resultant force is vertical to the direction of the inclined track; and obtaining given values of traction force through given speed, the acceleration curve and loads detected in real terms such that input current of the stator windings is controlled and closed-loop control is achieved over elevator speed, and the accelerated speed. The non-traction type inclined elevator and the control method thereof have following beneficial effects: there is no need to use a traction machine or a traction rope; control is easy; operation is safe; power consumption is little; and installation and maintenance are easy and convenient.

The invention discloses a combined piston type solenoid valve used for removing dust on a bag-type dust remover. The valve body is divided into an upper chamber and a lower chamber by a transverse interlayer, wherein the upper chamber and the lower chamber are communicated each other, the transverse interlayer is provided with a passageway connected with the upper chamber and air, a small piston and a large piston are respectively arranged in the upper chamber and the lower chamber, the upper end of the small piston is arranged in the inner chamber of a valve cap, the lower end of the small piston is arranged on the connector of the passage of the upper chamber and air by a small piston sealing element, a valve rod is arranged above the small piston to control the moving thereof, and the valve rod is connected with the moving core of the coil of solenoid valve by penetrating through the valve cap. A piston return spring is arranged between the large piston and the transverse interlayer, the bottom of the large piston can be connected or disconnected with a blowing pipe in a high pressure air pocket, thus controlling the blowing action thereof. The through hole controlled by the small piston is right the pilot hole of the large piston, thus a large pulse solenoid valve is controlled by a small pulse solenoid valve. The invention is simple in structure, rapid in open and close and good in pulse blowing effect; and meanwhile the valve comprises no membrane and working life is long.

The invention discloses a twisted wire core spiral linear inductor which includes a twisted wire core and an inner sleeve. The twisted wire core is wound in a spiral groove of the inner sleeve. The twisted wire core is formed by spirally twisting a plurality of metal wires and a plurality of aluminum wires. The inner sleeve is in a hollow cylinder shape, the outer wall of the inner sleeve is provided with the spiral groove, the bottom of the spiral groove is provided with a semicircular groove, the radius of the semicircular groove is the same as that of the twisted wire core, and each metal wire is a stainless steel wire or a manganese copper wire. The twisted wire core is formed by spirally twisting the plurality of metal wires and the plurality of aluminum wires. When a capacitor is subjected to internal breakdown, a large current passes through the inductor, the aluminum wires with a low melting point and low yield strength are melted, and stainless steel and the manganese copper wire are high in tensile strength and are still kept intact. The inductor impedance is significantly increased, which is equivalent to absorbing energy of the remaining capacitors to prevent the faultycapacitor from bursting.

The invention relates to the technical field of elevator manufacturing, in particular to a traction machine brake. The traction machine brake comprises a brake disc. A left brake pad and a right brake pad are arranged on the two sides of the left surface and the right surface of the brake disc respectively. The side, backing on to the brake disc, of the left brake pad is fixed to an armature plate. The side, backing on to the brake disc, of the right brake pad is fixed to an iron core plate right opposite to the armature plate. A connecting part is fixed to the side, close to the brake disc, of the armature plate and located above the brake disc, a connecting part is fixed to the side, close to the brake disc, of the iron core plate and located above the brake disc, and the two connecting parts can be crossed in the left-and-right direction. The connecting part of the armature plate and the connecting part of the iron core plate form a combined connecting part after being crossed and are connected in series through a connecting shaft rod arranged in the front-and-back direction, and the part, in front of the armature plate and the iron core plate, of the connecting shaft rod and the part, at back of the armature plate and the iron core plate, of the connecting shaft rod are connected to a brake installation base. The part, above the connecting shaft rod, of the iron core plate is provided with an electrified coil and a brake spring used for abutting against the armature plate. The traction machine brake is high in safety and stability, small in loss and low in noise and cost.