49results about How to "High overload performance" patented technology

The invention relates to a power drive system of an electric automobile, in particular to a motor with a mixed-flow fan for circulating inner and outer air paths. The invention solves the problems that the traditional electronic automobile has low reliability, heat radiation at low speed and poor effect when a self-ventilation motor is used as well as large size, difficult heat radiation and low peak powder and overload capacity when a fully-closed motor is used. The power drive system comprises an enclosure, an end cover, an inner cooling air path and a rotor; a mixed flow forced cooling fan is arranged on a non-driving end shaft of the motor; an engine seat shell of the enclosure is provided with U-shaped channel steel closely covering on paired air holes to form an enclosure inner air duct; a fan cover is arranged outside the enclosure, covers U-shaped channel steel and then is welded between two flanges form an enclosure outer air duct together with the engine seat shell; and air holes are formed on the two flanges of the enclosure as well as at the position of the motor end cover, which corresponds to the enclosure outer air duct. The device can better protect the inside of the motor from being intruded by dust and rain water and can ensure heat dissipation, smaller volume and weight requirement.

An anti-lock hydraulic braking system has a wheel brake circuit with a main brake cylinder, wheel brake cylinder and switching valve, and an auxiliary pressure circuit, connected in parallel between the switching valve and wheel brake cylinder on the wheel brake circuit. With ABS control, the switching valve can be switched from a basic position, where it hydraulically connects the main brake cylinder and wheel brake cylinder, to a switched position where it prevents a build-up of braking pressure on the wheel brake cylinder via the main brake cylinder, while the braking pressure on the wheel brake cylinder can be modulated by the auxiliary pressure circuit.

The invention relates to a die for exothermic welding of a grounding grid and a welding method. The welding method includes the process steps: cleaning a copper bar, a grounding rod and a die body and placing the copper bar and the grounding rod to be welded into a copper bar placing cavity and a grounding rod placing cavity respectively; clamping a left piece and a right piece of the die body, laying down a supporting piece, sealing the top of a die cavity and stopping exothermic welding flux before reaction from flowing into the die cavity; pouring the exothermic welding flux into a welding powder filling area, spreading initial pyrophoric powder and covering a die cover; igniting the pyrophoric powder by a firing gun and performing exothermic reaction of the exothermic welding flux in the die; opening the die after hot melting reaction of the exothermic welding flux for 10-20 seconds; taking out the copper bar and the grounding rod which are welded, and removing molten slag. The shortcomings of welding slag, easiness in oxidation, low connecting strength, easiness in corrosion, small contact area, large contact resistance and the like in traditional welding such as electric welding and braze welding, additional energy and power are omitted, and the welding method is a simple, high-efficiency and high-quality metal connecting process.

The invention relates to a motor, in particular to a permanent-magnet synchronous traction motor for a motor train. The permanent-magnet synchronous traction motor for the motor train solves the problem that an existing permanent-magnet synchronous motor is not suitable for being directly used as a permanent-magnet synchronous traction motor for a motor train due to structure defects. The motor adopts a novel rotor magnetic circuit structure punching plate, a high-integration compact type rotor structure, a detachable connecting box structure and a lead structure. A connecting box can be conveniently disassembled so that the motor can be installed easily. A U-shaped magnetic circuit permanent magnet structure of an inner rotor is adopted, the magnetic separation bridge and circular bead design is added, and therefore the start and overload capacity of the motor can be improved. A rotor pressing ring at the driving end integrates rotor core pressing, permanent magnet end face pressing, rotor dynamic balancing and an inner seal ring labyrinth seal structure into a whole, the advantages that the structure is compact, the axial occupied space is small, and the installation is convenient are achieved, and the motor can be widely applied in the field of locomotive trains. According to the research, development and the operation of the permanent-magnet synchronous traction motor for the motor train, realistic bases are supplied for the permanent-magnet motor to research and develop a permanent-magnet traction motor structure with higher power, higher rotation speed and higher power density.

The invention provides a variable frequency speed regulating disk type motor which uses sinusoidal windings and is in a double-layered type. Through interactive compensation action of two coils in each electrode of two main windings, the electrodes are sequentially connected, a magnetic filed is made to be distributed more evenly, the waveform is close to the sine wave, and declining of torque can not happen any more at a low rotating speed. Meanwhile, in the starting process, an auxiliary winding is connected with an operating capacitor and a starting capacitor, in the operating process, the auxiliary winding and the operating capacitor are connected, and startability and overload capacity are guaranteed. Meanwhile, through switching of the connecting mode of a high voltage and a low voltage, when the motor works in the high voltage of 200V-240V, the first main winding and the second main winding are in parallel connection with an auxiliary winding circuit after being in series connection, and when the motor works in the low voltage of 100V-120V, the first main winding, the second main winding and the auxiliary winding circuit are in mutual parallel connection. The variable frequency speed regulating disk type motor meets the operating demands in different rotating speed range under a general voltage condition in the global range. In addition, integration of the motor and a pump is achieved when the variable frequency speed regulating disk type motor is applied to a vacuum pump.

The invention discloses an iron winding core for a shell transformer and a manufacturing method. The iron core has rectangular iron winding cores, and the number of the iron winding cores is two; the two iron winding cores are bond together by using a binding belt and cured by using epoxy resin, and staggered windings are sleeved on the periphery of the binding belt; and a notch is formed above the binding belt on the two rectangular iron winding cores respectively, and the two notches are distributed symmetrically. The iron winding core for the shell transformer has the advantages of good maintainability, low reluctance, great reduction of no-load loss and extremely low noise; the iron winding core is mechanically wound so as to save the labor force and improve the production efficiency; the iron winding core is integral, so the iron winding core is easy to fix and wedge; and the iron winding core has high space factor and saves materials.

The invention relates to a preparation method of a heating type thermocouple liquid level measurement sensor. According to the preparation method of the heating type thermocouple liquid level measurement sensor, prepared heating elements and prepared armored cables are assembled together and fully sealed so that the heating type thermocouple liquid level measurement sensor can be obtained. The heating type thermocouple liquid level measurement sensor prepared through the method has the advantages of being capable of accurately judging a liquid-gas (vapor) interface under the conditions of high temperature and high pressure, good in reproducibility and high in resolution, capable of meeting requirements of an overload test, capable of accurately judging the liquid-gas (vapor) interface under severe environments of high temperature and high pressure, simple in process and good in uniformity of products.

The invention relates to the technical field of engineering machinery transmission, in particular to a spring resetting type overrunning clutch for an energy-conservation type loader with low rotating speed. An inclined angle between a spring resetting hole and an inner ring cam ranges from 30 degrees to 34 degrees; the diameter of the spring resetting hole ranges from 4.49mm to 4.538mm, and the depth of the spring resetting hole ranges from 15mm to 15.1mm; and the cross section of a roller path wall is circular arc-shaped. The spring resetting type overrunning clutch has a simple structure, a low reduction ratio, large transmission torque, good overloading performance and long service life, is stable in working and safe and reliable, and is beneficial to realizing energy conservation and emission reduction of the domestic loader and improving the performances of the whole loader.

The invention provides a variable frequency speed regulating disk type motor which uses sinusoidal windings and is in a double-layered type. Through interactive compensation action of two coils in each electrode of two main windings, the electrodes are sequentially connected, a magnetic filed is made to be distributed more evenly, the waveform is close to the sine wave, and declining of torque can not happen any more at a low rotating speed. Meanwhile, in the starting process, an auxiliary winding is connected with an operating capacitor and a starting capacitor, in the operating process, the auxiliary winding and the operating capacitor are connected, and startability and overload capacity are guaranteed. Meanwhile, through switching of the connecting mode of a high voltage and a low voltage, when the motor works in the high voltage of 200V-240V, the first main winding and the second main winding are in parallel connection with an auxiliary winding circuit after being in series connection, and when the motor works in the low voltage of 100V-120V, the first main winding, the second main winding and the auxiliary winding circuit are in mutual parallel connection. The variable frequency speed regulating disk type motor meets the operating demands in different rotating speed range under a general voltage condition in the global range. In addition, integration of the motor and a pump is achieved when the variable frequency speed regulating disk type motor is applied to a vacuum pump.

The invention provides a method for manufacturing winding wires. The method comprises the following steps: (1) covering a first layer of mica tapes horizontally; (2) covering a second layer of mica tapes horizontally; (3) covering a third layer of mica tapes horizontally; (4) carrying out winding covering; and (5) sintering, cooling and rolling. The winding wires manufactured by the method are smooth in surface, high in mechanical strength, good in manufacturability, strong in overload capacity and good in wet-heat resisting property; compared with glass fibers, the abrasive resistance of the winding wires is improved remarkably; the tiny gaps are generated when lap taping does not exist and the winding wire are easy to penetrate when vacuum pressure is utilized to soak, thus motor insulation realizes non-gap insulation; and the winding wires are applied to manufacturing stator coils of 6kV and 10kV motors.

An anti-lock hydraulic braking system has a wheel brake circuit with a main brake cylinder, wheel brake cylinder and switching valve, and an auxiliary pressure circuit, connected in parallel between the switching valve and wheel brake cylinder on the wheel brake circuit. With ABS control, the switching valve can be switched from a basic position, where it hydraulically connects the main brake cylinder and wheel brake cylinder, to a switched position where it prevents a build-up of braking pressure on the wheel brake cylinder via the main brake cylinder, while the braking pressure on the wheel brake cylinder can be modulated by the auxiliary pressure circuit.

The invention relates to a preparation method of a heating type thermocouple liquid level measurement sensor. According to the preparation method of the heating type thermocouple liquid level measurement sensor, prepared heating elements and prepared armored cables are assembled together and fully sealed so that the heating type thermocouple liquid level measurement sensor can be obtained. The heating type thermocouple liquid level measurement sensor prepared through the method has the advantages of being capable of accurately judging a liquid-gas (vapor) interface under the conditions of high temperature and high pressure, good in reproducibility and high in resolution, capable of meeting requirements of an overload test, capable of accurately judging the liquid-gas (vapor) interface under severe environments of high temperature and high pressure, simple in process and good in uniformity of products.

A circulating type permanent magnet linear motor belongs to the technical field of electromagnetic power driving. A guide rail type casing of the circulating type permanent magnet linear motor is in a square tube shape, the lower end face of the guide rail type casing is provided with a long straight slot along the direction of an axial lead thereof; a conveyor belt type rotor is formed by laminating of a rubber basic layer and a reinforced fiber layer, and the external part of the conveyor belt type rotor is wrapped with a layer of wrapping layer; a plurality of permanent magnets and permanent magnet support strips are inlaid in the rubber basic layer; the upper end of a first belt wheel support, the upper end of a second belt wheel support, the conveyor belt type rotor, a first belt wheel and a second belt wheel are all arranged in the guide rail type casing, so that a gap is provided between the lower end face of the conveyor belt type rotor and the upper end face of an upper electrode of a plate-type stator; and end faces at two sides of the lower end face of the conveyor belt type rotor are in friction abutting with the upper surfaces at two sides of the long straight slot at the lower end inside the guide rail type casing. The circulating type permanent magnet linear motor of the present invention can achieve long-distance driving of a low-cost linear motor, and has the advantages of simple structure, good heat dissipation, good overload capacity and good climbing performance of a linear motor at the same time.

The invention relates to a motor, in particular to a permanent-magnet synchronous traction motor for a motor train. The permanent-magnet synchronous traction motor for the motor train solves the problem that an existing permanent-magnet synchronous motor is not suitable for being directly used as a permanent-magnet synchronous traction motor for a motor train due to structure defects. The motor adopts a novel rotor magnetic circuit structure punching plate, a high-integration compact type rotor structure, a detachable connecting box structure and a lead structure. A connecting box can be conveniently disassembled so that the motor can be installed easily. A U-shaped magnetic circuit permanent magnet structure of an inner rotor is adopted, the magnetic separation bridge and circular bead design is added, and therefore the start and overload capacity of the motor can be improved. A rotor pressing ring at the driving end integrates rotor core pressing, permanent magnet end face pressing, rotor dynamic balancing and an inner seal ring labyrinth seal structure into a whole, the advantages that the structure is compact, the axial occupied space is small, and the installation is convenient are achieved, and the motor can be widely applied in the field of locomotive trains. According to the research, development and the operation of the permanent-magnet synchronous traction motor for the motor train, realistic bases are supplied for the permanent-magnet motor to research and develop a permanent-magnet traction motor structure with higher power, higher rotation speed and higher power density.

This application is applicable to the technical field of motor drive control, and provides a motor function safety control method and device. The method includes: obtaining the control command data sent by the host computer; obtaining the operation data of the motor; calculating the operation data to obtain the motor safety Running data; compare the size of the control command data and the safe running data; if the control command data is less than or equal to the safe running data, send the control command data to the motor controller, and control the motor controller to drive the motor to run according to the control command data. This application realizes the control of the current or power of the motor, ensuring that the actual temperature value of the motor is not greater than the temperature limit value, and can maximize the overload performance of the motor, and at the same time increases the rotation speed of the motor system through motor overload moment density.

The invention relates to a method for manufacturing a non-aging aluminum alloy wire, in particular to a method for manufacturing an aluminum alloy wire used in an overhead power transmission line, and a product produced by the method. The non-aging aluminum alloy wire of the present invention includes the following ingredients in weight percentage: Mg 0.08-0.20%, Fe 0.10-0.25%, Cu0.05-0.18%, the sum of Ti, V, Mn, Cr elements≤0.01%, and the rest is Aluminum liquid. The conductivity of the aluminum alloy wire produced by the above alloy formula can reach 59%IACS, and the strength can reach 240-255MPa. The aluminum alloy wire stranded with this single wire has high conductivity, low resistance loss, good arc sag characteristics, and no hysteresis. Loss, overload performance and other characteristics.

The invention discloses a flexible pendulous accelerometer, which comprises a shell, a flexible rod, a torquer moving coil, a torquer stator consisting of a yoke iron and a permanent magnet, a signal sensor consisting of a signal sensor moving coil and a signal sensor stator, a triangular pendulous reed and a servoamplifier, wherein the shell is full of a damping liquid; the triangular pendulous reed, the torquer moving coil and the signal sensor moving coil form a pendulum module; the flexible rod ensures that the pendulum module and an instrument shell are elastically connected; and the torquer stator and the torquer moving coil form a torquer. The flexible pendulous accelerometer eliminates the Coulomb friction force caused by a pivot and a jewelled bearing compared with the prior jewelled bearing supporting mode due to adopting a flexible supporting mode; the flexible supporting has small rigidity in a sensitive direction of the accelerometer and has large rigidity in other directions at the same time, which improves instrument measurement precision as well as vibration-resistant and shock-resistant abilities; the flexible pendulous accelerometer adopts a liquid for damping, and has better overload capacity and shock-resistant capability compared with a quartz flexible pendulous accelerometer adopting air damping.