64results about How to "Increase the rotation frequency" patented technology

A stator core is formed into a cylindrical shape, 3n teeth are disposed at a predetermined pitch in a circumferential direction where n is a positive integer, and slots are formed between adjacent pairs of the teeth so as to open onto an inner circumferential side. A stator coil is installed as a concentrated winding in the stator core. A rotor is rotatably disposed inside the stator and 2n permanent magnets are disposed at a predetermined pitch in a circumferential direction on an outer peripheral portion of a shaft. The stator core is constructed such that a slot opening (d) and a slot pitch (p) at an inner circumferential surface of the stator core satisfy an expression 0.1≦d/p≦0.3.

The present invention relates to an electrode device for gas discharge sources, a gas discharge source comprising such an electrode device and to a method of operating the gas discharge source. The electrode device comprises an electrode wheel (1) rotatable around a rotational axis (3) and a wiper unit (11) arranged to limit the thickness of a liquid material film applied to at least a portion of an outer circumferential surface (18) of the electrode wheel (1) during rotation of said electrode wheel (1). The wiper unit (11) is arranged and designed to form a gap (17) between the outer circumferential surface (18) and a wiping edge (19) of the wiper unit (11) and to inhibit or at least reduce a migration of liquid material from side surfaces to the outer circumferential surface (18) of the electrode wheel (1) during rotation. With the proposed electrode device the electrode wheel (1) can be rotated at higher rotational speeds without the formation of droplets resulting in a higher output power and pulse frequency of a gas discharge source having such an electrode device.

A walk-behind lawn mower in a form that a handle arm is integrally provided toward an obliquely upper back in a rear of a machine, and a loop handle is provided at a rear end of the relevant handle arm with slightly tilting forward, and a driver performs drive operation while walking following the machine that travels by itself at a back of the machine, includes a throttle lever, the throttle lever being able to be drawn together with the handle by being operated by either of right and left hands grasping the handle, in addition, engine rotation frequency being able to be controlled using the amount of drawing, wherein the throttle lever is rotatably provided on the handle arm in an obliquely lower front or obliquely upper back of the handle.

When a rotation frequency of a rotary shaft 2 is not more than a predetermined value, a clutch 7 connects the gearing systems 6 and 8 with each other. Then, the rotation from the rotary shaft 2 is accelerated through the gearing system 6, clutch 7, and gearing system 8, and is transmitted to the rotary shaft 4. At this point, a freewheel clutch 5 disconnects the rotary shafts 2 and 4 from each other. On the other hand, when the rotation frequency of the rotary shaft 2 surpasses the predetermined value, the clutch 7 disconnects the gearing systems 6 and 8 from each other. Then, the rotation frequency of the rotary shaft 4 drops. When the rotation frequency of the rotary shaft 2 equals that of the rotary shaft 4, the freewheel clutch 5 connects the rotary shafts 2 and 4 with each other, thereby transmitting the rotation from the rotary shaft 2 as it is to the rotary shaft 4 via the freewheel clutch 5.

The invention discloses a reflow backwashing mechanism for automatic filtration of fluid. The reflow backwashing mechanism is characterized in that: a fluid inversion chamber (2) is internally provided with a hollow shaft sleeve (12), a blade and a baffle plate are connected with the hollow shaft sleeve (12) which is provided with an opening at a position of the lower part of the baffle plate of the hollow shaft sleeve (12), the hollow shaft sleeve (12) is internally provided with a hollow core shaft (13) with an upward opening, and a shaft wall of the hollow core shaft (13) is distributed with a through hole (14). The reflow backwashing mechanism is provided with a guide through hole with obliquity, thus being capable of fully utilizing composite force of reflow backwashing produced by normal fluid flow and fluid flow out of the oblique guide through hole to quicken rotation frequency of the inversed fluid. The inversed fluid is more stable due to dependence on the core shaft for rotation and arrangement of a counterweight balance, thus the reflow backwashing mechanism has advantages of causing the whole system to have safe and reliable operation and greatly improving automatic filtration effect.

The invention discloses a system for detecting phase centers of GPS (global positioning system) antennas by the aid of continuous rotation processes. The system comprises a base, a rotary table and a control unit. The rotary table comprises a support rod, a cantilever support plate, a rotary support bearing, a driven gear and a GPS antenna connecting rod; a stepper motor is fixed to a cantilever end of the cantilever support plate, a driving gear which meshes with the driven gear is arranged on an output shaft of the stepper motor, the stepper motor is connected with an encoder, and the encoder is used for feeding back rotation angles of the stepper motor; the control unit comprises a man-machine interaction module, a GPS time service module and a motor driver which are connected with a single chip microcomputer controller. The single chip microcomputer controller is connected with the encoder and is used for receiving rotation angle information of the motor, and the rotation angle information of the motor is fed by the encoder, so that closed-loop control can be carried out on the GPS antenna connecting rod. The system has the advantages that pointing directions of the antennas can be accurately changed by the system, and accordingly influence of observation errors such as multi-path effects can be effectively reduced; detection results are accurate, data are real, and the system is high in practicality.

The invention relates to a rotation speed and position detecting method for an outdoor fan of a DC permanent magnet synchronous motor (PMSM), belongs to the technical field of obtaining rotation speed and position of the motor, and aims at solving the problems that rotation speed and position detection for the outdoor fan of an air conditioner at present is inaccurate, and a concrete method for detecting forward and backward rotation of the motor lacks. The method comprises the following steps that a phase voltage value between a three-phase back electromotive force of the motor and a central point is obtained; According to a time difference between first zero-crossing time and second zero-crossing time of the phase voltage value of the three-phase back electromotive force, angles corresponding to the zero-crossing time of the phase voltage value of the three-phase back electromotive force is obtained at the same time, and position information of a motor rotor is further obtained; and the rotation frequency of the motor is calculated via phase-locked loop control. The method is suitable for the air conditioner.

A method for diagnosing a torque impulse generator which includes a rotational input portion, a torque output portion, an oil reservoir and a torque generating arrangement converting rotation of the input portion to torque impulses at the torque output portion, the method includes: detecting an acoustic signal from the torque impulse generator while generating torque impulses, extracting the frequency of torque impulses from the acoustic signal, and diagnosing the torque impulse generator based on the frequency of torque impulses, to indicate the level of oil in the oil reservoir.

The invention discloses a basketball serving device; the basketball serving device comprises a ball serving throwing outer frame, wherein a basketball guide pipeline is fixedly connected to the position, close to the upper part, of the left side of the inner frame of the ball serving throwing outer frame; a transmission channel is fixedly connected to the right side of the bottom of the basketballguide pipeline; the transmission channel is inclined towards the lower right; the vertical direction of the right end of the transmission channel is fixedly connected with a ball inlet vertical pipeline; a transmission shaft is rotationally connected with the left side of the interior of the ball serving throwing outer frame; the exterior of the transmission shaft is fixedly connected with a serving barrel; electric telescopic rods are fixedly connected to the upper end and the lower end of the left side of the ball serving barrel respectively; the output ends of the electric telescopic rodsare fixedly connected with a ball serving top plate; the right side of the ball serving top plate is connected with a ball serving limiting frame in a rotating mode; and an adjusting reference mechanism is fixedly connected to the right side of the outer portion of the ball serving throwing outer frame and close to the serving barrel; and the invention relates to the technical field of basketballtools. The basketball serving device has the advantages that the emission precision of the basketball can be improved, the service quality can be improved, and the labor force of the basketball assisting personnel can be reduced.

The invention discloses a transmission line bird repellent device. The bird repellent device is arranged on an overhead transmission line tower, a bird repellent rod is arranged on a mounting base, and bird repellent fan blades are arranged on the bird repellent rod; a storage battery, an intelligent processor and an electric rotary table are arranged in the mounting base, the bird repellent rod is fixedly connected with the electric rotary table, the storage battery supplies electricity to the intelligent processor, the bird repellent rod is provided with a radar and multiple light transmitters, and the radar and the light transmitters are connected with the intelligent processor; the storage battery supplies electricity to the radar and intelligent processor, it is ensured that the radardetects the surrounding conditions constantly, when the condition is detected, birds are driven away through the light transmitters and pingers, and the good bird repellent effect is achieved. According to the bird repellent device, under the bad conditions, inspection workers can be requested to find out the condition and solve the condition in time, and it is ensured that the birds do not neston telegraph pole towers.

The invention discloses an automobile tire abrasion resistance testing device, and belongs to the technical field of automobile tire testing, the automobile tire abrasion resistance testing device comprises a conveying device, a speed regulation device, a tire clamping device, an abrasion resistance testing device and a discharging table, the conveying device is arranged on the ground, and the speed regulation device is arranged on the ground and located over the conveying device; the tire clamping device is installed at the bottom of the speed adjusting device, the abrasion resistance testing device is installed on one side of the conveying device, and the discharging table is installed at one end of the conveying device. A batch of casual inspection tires are sequentially conveyed to the position below the tire clamping device through the conveying device, the tire clamping device fixes the to-be-detected tires, the wear resistance testing device moves to the two sides of the tires, then the tires are controlled by the speed adjusting device to rotate, and the wear resistance of the tires is detected. The rotating speed of the tires of different sizes is adjusted through the speed adjusting device, the tires are conveyed to the discharging table through the conveying device after testing is completed, and detection personnel measure the outer ring diameter change of the tires so as to judge whether the abrasion resistance is qualified or not.

The invention discloses an oil-immersed power transformer, which comprises a transformer housing; heat dissipation fins are arranged on the surface of the transformer shell; the upper surface of the transformer shell is fixedly connected with a heat dissipation device; the heat dissipation device comprises an n-shaped frame; the bottom of the n-shaped frame is fixedly connected with the upper surface of the transformer shell; a motor is fixedly connected to the upper surface of the n-shaped frame; a first shaft is fixedly connected to the bottom of an output shaft on the motor; a second gear is meshed with the side face of the first gear; a second shaft is fixedly connected to the inner wall of the second gear; and the top of the second shaft rotates on the top of the inner wall of the n-shaped frame in a limited mode. According to the transformer, through cooperative use of the structures, the problems that in the actual use process, due to the fact that airflow pushed by traditionalfan blades in the rotating process is difficult to blow the whole surface of the transformer, heat dissipation of the surface of the transformer is not complete enough, efficiency is low, and inconvenience is brought to use are solved.

The invention discloses a rotary room temperature magnetic refrigerator heat circulation system. The rotary room temperature magnetic refrigerator heat circulation system comprises a double-sided magnetic field, magnetic working medium beds, a heat exchange device and a rotating shaft; the double-sided magnetic field is provided with the rotating shaft at the center, the rotating shaft is connected to a machine frame, and the double-sided magnetic field is provided with two mirror symmetric magnetic field air gaps; the magnetic working medium bed is fixed to the periphery of the machine frame,and is provided with a cold port, a first heat port and a second heat port, and the magnetic working medium bed comprises two sets of magnetic working medium bed monomers; the heat exchange device comprises a radiator, a cold chamber, a pump, a first electromagnetic valve, a second electromagnetic valve, a third electromagnetic valve and a fourth electromagnetic valve, wherein cold ports of the two magnetic working medium beds are connected with the cold chamber through a pipeline, and first heat ports of the two magnetic working medium beds are connected with the pump through a pipeline; andsecond heat ports of the two magnetic working medium beds are connected with the same end of the radiator through a pipeline, and the other end of the radiator is connected with the pump through a pipeline. According to the rotary room temperature magnetic refrigerator heat circulation system, the processing and maintenance cost is reduced, and the running reliability of the rotary refrigerator is improved.

The present invention relates to a rotor for an X-ray tube. In order to provide further possibilities for weight reduction in X-ray tubes for providing an increase of rotation frequency, a rotor (10) for an X-ray tube is provided, comprising a rotational structure (12) with a plurality of electrically conducting elements (14), the ends thereof connected to each other and provided such that an external stator magnetic field generated by a stator induces a current in the electrically conducting elements, which current generates a rotor magnetic field to interact with the stator magnetic field. At least the plurality of electrically conducting elements is made from carbon composite based material.

The invention discloses a cavitation micro-explosion emulsifying machine, and relates to the technical field of emulsifying machines. The emulsification efficiency is improved, the device specificallycomprises a main body, a motor is installed on the outer wall of the top of the main body through a motor base, the output end of the motor is rotationally connected with a rotating main shaft through a coupler, stirring arms which are evenly distributed are welded to the outer wall of the circumference of the rotating main shaft, two or more air bags are arranged on each stirring arm, and an airpressure generating device is fixed to the outer wall of the top of the body through screws. By arranging the rotating main shaft, the stirring arms and other structures, the motor can be used for driving the stirring arms to conduct stirring, and material emulsification is promoted, meanwhile, due to the arrangement of the air bag and the air pressure generating device, the air pressure generating device can be used for controlling the air bag to rapidly expand and contract while the stirring arm is used for stirring, so that the pressure in the stirred materials is unstable, the materials are more irregular in the flowing process, and the emulsifying and mixing effects are further improved.

The mechanism has a crank mechanism (7) arranged in an interior of a distributor roll. The crank mechanism has three-dimensional mechanism kinematics which transform rotation of a roll barrel into its axial to-and-fro movement. The crank mechanism has a crank connected to a crankshaft in a rotationally articulated manner via a joint, and is connected to a lever arm of a swing arm via another joint (12). - An INDEPENDENT CLAIM is also included for a printing machine and distributor roll combination.

The invention relates to the technical field of electrical equipment. A mirror surface scattering light source type bird repelling device comprises a base, a rotary shaft and a wind cup, wherein the base comprises a U-shaped clamp slot, the rotary shaft is connected with the side wall of the U-shaped clamp slot, the wind cup is connected with the rotary shaft by a support rod, and comprises a reflective mirror and a cover body, the front part of the cover body is shaped like a bowl opening, the rear part of the cover body is conical, the reflective mirror is movably connected with the front part of the cover body, and the area of the acting surface of the reflective mirror is less than that of the front part of the cover body. The bird repelling device is simple in overall structure and reasonable in design; under the combined action of the base, the rotary shaft and the wind cup, the bird repelling effect can be effectively improved, bird troubles are reduced, meanwhile, the power supply reliability is indirectly improved, and popularization and application are facilitated.

According to an aspect, this invention relates to a cooling device for a disc brake, the device extending in a longitudinal direction and comprising a first portion configured to surround the discs of the brake, intended for being arranged facing the side surfaces of the brake discs and configured to capture, by irradiation and/or convection, the heat generated by the discs during the friction. The cooling device further includes a second portion, secured and thermally coupled to the first portion, offset in the longitudinal direction relative to the first portion, and provided with tins extending radially relative to the longitudinal direction and configured to dissipate the heat captured by the first portion, by convection and/or irradiation, into the ambient air.

The invention discloses a feeding device for adjusting the feeding of a reaction vessel, which includes a driving motor, a universal joint, an inlet pipe, a branch main pipe, and a main body of a reactor. The first branch supervisor, the second branch supervisor, the third branch supervisor, and the fourth branch supervisor are arranged in turn on the branch supervisor, the total flow sensor is installed on the inlet pipe, and the first Solenoid valve, there is a second solenoid valve on the branch supervisor between the second branch supervisor and the first branch supervisor, a third solenoid valve is provided on the connecting pipeline between the third branch supervisor and the branch supervisor, the third branch supervisor and the fourth branch supervisor A fourth electromagnetic valve is arranged on the branch main pipes between the branch main pipes. In this technical solution, the rotation frequency and rotation range of the universal joint are adjusted and controlled by driving the motor, frequency converter, etc., so as to prevent the high rotation frequency of the universal joint from falling onto the inner wall of the reaction kettle.