594results about How to "Reduce mechanical wear" patented technology

A multi-layered belt, in particular a continuous running and/or transport and/or processing belt, includes a traction layer and a functional layer that contains a gel. To reduce the stress placed on the transported goods, in particular persons, the gel is an unplasticized gel and the functional layer consist of a coating containing the interspersed gel. In addition, to a method for producing a belt of this type is provided, in which the gel is poured in a continuous method onto the traction layer and a mixer and delivery unit is guided back and forth in a reversible manner perpendicular to the displacement direction of the traction layer in such a way that a gel layer with a uniform thickness is applied to the traction layer. Furthermore, the use of said belt as a running belt for persons, in particular as a running belt for training and/or fitness equipment is described.

A blood pump (1) comprises a pump casing (2) having a blood flow inlet (5) and a blood flow outlet (6) connected by a passage (7), and an impeller (3) arranged in said pump casing (2) so as to be rotatable about an axis of rotation (9). The impeller (3) is provided with blades (4) sized and shaped for conveying blood along the passage (7) from the blood flow inlet (5) to the blood flow outlet (6), and is rotatably supported in the pump casing (2) by a first bearing (10) at a first axial end of the impeller (3) and a second bearing (20) axially spaced apart from the first bearing (10). The first bearing (10) comprises a projection (11) extending along the axis of rotation (9) and connected to one of the impeller (3) and the pump casing (2) and a cavity (13) in the other one of the impeller (3) and the pump casing (2), the projection (11) comprising an enlarged portion (12) that engages the cavity (13) such that the first bearing (10) and the second bearing (20) are arranged to bear axial forces in the same axial direction.

A peristaltic pump includes a plurality of effecters, actuated in a periodic manner upon by obstructive forces of a flexible infusion tube so as flow of infusion fluid is provided along said infusion tube, the magnitude of the obstructive forces being dependent upon the displacement of said moving effecters; and a plurality of balancing magnets providing balancing forces upon one or all the moving effecters, the balancing forces at each point along the path of motion of the moving effecters being of approximately equal magnitude to that of the obstructive forces at the point; such that the parasitic output due to work performed against the obstructive forces is approximately zero and yield is maximized.

In an underground exploitation process of a coal mine, the coal recovery rate needs improving, and a roller bit of a coal mining machine is prevented from cutting roof strata as far as possible so as not to damage equipment or even cause accidents, so an interface of a coal layer and a rock layer needs on-line identification. The invention provides a coal-rock interface identification method, a coal-rock interface identification system and a coal-rock interface identification probe. A specific energy-level high-pressure water jet which can penetrate the coal layer but cannot penetrate the rock layer is jetted to the coal layer above a tunnel, different acting forces of reflected flow reflected by the coal layer or the rock layer on a nozzle are sensed in real time, and a controller judges the distance between the upper end of the roller bit of the coal mining machine and the coal-rock interface to realize automatic heightening control of a rocker arm of the coal mining machine so that the coal exploitation process realizes the goals of high recovery rate, low mechanical abrasion rate, automatic operation and the like. The coal-rock interface identification method, the coal-rock interface identification system and the coal-rock interface identification probe provided by the invention have the advantages of low cost, high adaptability, high reliability, intrinsic safety and the like.

The invention concerns a method for reducing mechanical oscillation in a wind power plant which comprises a plurality of rotor blades, a wind turbine drive train and a generator, wherein the rotor blades are rotatably connected to the generator by the wind turbine drive train. The method comprises the steps: mathematically modeling the dynamical response and/or transfer function of a group of rotatable parts of the wind power plant, the group of rotatable parts comprising at least the wind turbine drive train, and determining dynamical response and/or transfer function of the group; in operation of the wind power plant, determining a first parameter characteristic of the mechanical oscillation at a first location, controlling the operation of at least one rotatable part in response to the dynamical response and/or transfer function of the group and at least the first parameter. In effect, resonance induced mechanical wear is reduced which leads to an increased life time of the wind power plant.

An image stabilized digital image capture device, comprising an image sensor for capturing a digital image; an optical system for imaging a scene onto the image sensor; an image stabilization system; an exposure control system; a memory system; and a processor. The processor is used to perform the steps of determining exposure settings using the exposure control system; selectively engaging the image stabilization system responsive to whether the determined exposure settings satisfy a predefined condition; capturing a digital image of a scene using the image sensor and the selectively engaged image stabilization system; and storing the captured digital image in the memory system.

The invention discloses an intelligent elevator and belongs to the intelligent control field of the elevator, and the elevator can automatically call, cancel stoppage and give an alarm when people is trapped in an elevator due to a fault. Upon a controller of a fingerprint access control machine judges out correct fingerprint information and gives out an opening command, the fingerprint information is transmitted to a data analyzing module through a 3G communicating module, the data analyzing module transmits the existing employee work floor information corresponding to the fingerprint information to a main elevator controller through RS 232 serial ports, when the employee work floor is more than one, the elevator controller gives out the command to start 'up and down keys' outside the elevator and related 'floor keys' inside the elevator for intelligent calling, and the employee can cancel calling and select the floor by again pressing the keys. A displayer is added with a sign of 'a surplus effective load for the elevator' and pressure sensors are arranged outside and inside the elevator, thereby avoiding the phenomenon of 'nobody enters into the elevator under stoppage', 'the elevator still stops in capacity load', ' the elevator still stops in idle load and without calling', and ' the elevator cannot give the alarm when people is trapped'.

The invention relates to a universal servocontrol platform device for a motor-operating mechanism of a high-voltage switch apparatus and a control method; the device comprises an operating mechanism, a main loop and a control loop, wherein, the input terminal of a signal pretreatment circuit in the control loop is connected with a voltage mutual inductor and a current mutual inductor, for measuring the voltage and the current of a power network. The control method for the device comprises the step of calculating optimal contact speed via values of the voltage and the current acquired by the power network to control the operation of the contact. The invention has the advantage that the values of the voltage and the current of the power network are used for calculating an optical speed curve in a DSP chip, a switch on/off speed is compared with the optical speed curve while being regulated and controlled in order to regulate the on/off speed for minimizing an impact on the switch, optimizing the speed, reducing the generation of electric arcs, decreasing mechanical abrasion, promoting the switching effect and saving electric power. Meanwhile, a variety of operating mechanisms can be replaced mutually on the inventive operating platform, thus saving the manufacturing cost, simplifying the operation and saving labor force and material resource.

The invention relates to a fuel cell based hybrid power system for utilizing the waste heat of an internal combustion engine and belongs to the technical field of vehicle hybrid power. A fuel reformer is arranged on an exhaust pipe of the internal combustion engine, fuel is reformed by using the waste heat of exhaust gas, the generated reformed hydrogen rich gas is used as the fuel of a fuel cell, and electric energy which is generated by the fuel cell is stored in a storage battery, so the waste heat of the exhaust gas of the internal combustion engine can be recovered; meanwhile, a motor or a generator is arranged at an output shaft end of the internal combustion engine and used for recovering the brake energy of a vehicle in a running process, and the brake energy is also stored into the storage battery; and furthermore, by the adoption of the motor or the generator, the internal combustion engine can be automatically started or stopped, and auxiliary power is supplied under specific working conditions. The system can effectively utilize the waste heat of the exhaust gas and the brake energy of the internal combustion engine, the idling condition of the internal combustion engine can be eliminated, and the fuel consumption and harmful emission of the internal combustion engine can be reduced.

The invention discloses a method for synthesizing N-benzyl maleimide from an immobilized supported acid catalyst and belongs to the synthesis technical field. The method comprises the following steps: soaking silica gel, a molecular sieve, aluminum trioxide and acidic resin or an active carbon carrier in an acid solution in equal volume, drying the mixture to obtain a supported catalyst and putting the supported catalyst into a stainless steel net; adding aniline and maleic anhydride into a benzene, toluene or xylene solvent and acidylating, stirring and heating the mixture to obtain the N-benzyl maleimide acid solution; then adding the N-benzyl maleimide acid solution, a polymerization inhibitor and the supported catalyst into a dehydration reactor for dehydration cyclization, reducing the pressure to remove the solvent and obtain the N-benzyl maleimide crude product, and recrystallizing in the solvent to obtain the N-benzyl maleimide. The invention has the advantages of high yield of N-benzyl maleimide, low content of waste acid, few production flows, low cost and little discharge of acid-containing waste water; moreover, as the catalyst is immobilized, the invention simplifies the replacement of the catalyst, reduces the mechanical abrasion of the catalyst and prolongs the service life of the catalyst.

The invention discloses a hub motor driving device, which comprises a transmission hub, a speed reducer and a driving motor, wherein the transmission hub is arranged on a hub, a speed reducer casing of the speed reducer is arranged on a suspension of a vehicle, a motor front end cap of the driving motor is fixedly arranged on the speed reducer casing to seal the speed reducer, a motor shaft of the driving motor is connected with an input shaft of the speed reducer, and an output shaft of the speed reducer is connected with the transmission hub. The device has the advantages that a large amount of transmission parts of the traditional vehicle is saved, the structure of the vehicle is simpler, a plurality of complicated driving methods can be realized, the device is suitable for a plurality of new energy vehicle techniques, and the energy consumption and the mechanical abrasion are reduced.

The invention discloses a primary frequency modulation control method and system for a wind power plant. A wind power plant power distribution strategy by using overspeed load shedding control is used. The method comprises the steps that: after a wind power plant receives a system scheduling instruction, power requiring load shedding is calculated according to wind speed information fed back by all wind turbine generators, a power reference value and a load shedding control mode are distributed to all single machines, rotor kinetic energy of the wind turbine generators is stored to the maximumextent, and the frequency dynamic characteristic of a system is improved; and a variable parameter control strategy is utilized in frequency modulation control, the control strategy can ensure that afan can release the maximum standby power in the frequency modulation process, and the recovery speed after frequency drop is increased. It is guaranteed that each fan sufficiently releases standby power in the frequency modulation process, and a frequency steady-state value is effectively increased. The change of an inertia control coefficient can effectively improve the recovery speed of the frequency.

A direct replacement impeller hub for the torque converter of an automatic transmission and a method of repairing an impeller assembly utilizing the replacement impeller hub to provide increased service longevity. In the present impeller hub the geometric roundness characteristic of the impeller hub is controlled to an exacting tolerance during the manufacturing process in accordance with American National Standards Institute (ANSI) definitions to provide a close tolerance fit within a mating bearing sleeve. The present impeller hub is also finish ground in accordance with ANSI definitions to reduce surface friction and to provide an optimal sealing surface for engagement with a radial seal, which is disposed about the impeller hub sealing it to prevent contaminants from entering the hydraulic pump of the transmission. The present impeller hub also includes additional structural features such as fillet radii machined on selected features to facilitate assembly of the torque converter.

The invention discloses a distributed secondary frequency modulation control method considering energy storage, and belongs to the technical field of power grid secondary frequency modulation power generation. An inferiority index function based on the charge and discharge power offset and the state of charge offset is established for the condition of secondary frequency modulation having participation of energy storage, and the inferiority index function based on the power offset is established for the condition of secondary frequency modulation having participation of the conventional motorset. The consistency variable of a frequency modulation power supply is determined by the partial derivative of the inferiority index function relative to the power offset, and then the secondary frequency modulation demand quantity is allocated according to the proportion of the maximum power offset of the frequency modulation power supply relative to the total frequency modulation power of the system. Minimization of the power offset and the state of charge offset acts as the consistency variable of the target iterative update frequency modulation power supply, and the rapidity of energy storage frequency modulation response is fully utilized so that accurate tracking of the system ACE signal can be realized, the power grid frequency modulation capacity can be enhanced and the system robustness can be enhanced.

The invention discloses an escalator or automatic sidewalk driving device, comprising a permanent-magnetic synchronous motor and a transmission device; the transmission device comprises a primary gearbox and a secondary gearbox; an output shaft of the secondary gearbox is axially connected with a main transmission shaft. The secondary gearbox adopts a crossing engagement type of a spiral bevel gear pair structure and transmits the output torque of the primary gearbox. The solar wheel shaft of the primary planetary gearbox has the same axis as the central shaft of a driving motor; the output axis line of the secondary gearbox is vertical to the axis line of the solar wheel shaft, so as to lead the primary planetary gearbox and the secondary gearbox to be installed, debugged and dismounted in a fission way and lead the driving device to be connected at the end side of the main transmission shaft of a step chain wheel. The escalator driving device of the invention adopts a two-step full-gear transmission structure, has little mechanical abrasion, long service life and high transmission efficiency, and realizes the effects of escalator driving multi-item efficacy energy saving.

The invention relates to a full-automatic cutting machine of numerical controlled valve, which comprises a machine body, a feeding mechanism, a positioning mechanism, a geared head, a knife rest mechanism, a pushing mechanism and a numerical controlled electric box. The positioning mechanism utilizes a rigid ball base rotary positioning head and a positioning fixture at the end face of a valve disk part in the geared head to realize the full length cutting processing of the valve, and utilizes a flexible ball base rotary positioning head and a positioning fixture at the conical surface of the valve disk part in the geared head to realize the L-check size grooving processing of the valve. The rigid and flexible ball base rotary positioning heads overcome friction between workpieces and a positioner, eliminate the influences of the flat beat of the valve on positioning precision and the length precision of the processed valve reaches +/- 0.025mm. The cutting machine has simple structure, convenient operation and high full-automatic processing efficiency, is applicable to the full length cutting and grooving of the valve, and can be expanded to use the conical surface of the valve to position and process a sandwich groove of a lock and chamfer the end face of a valve rod; therefore, the full-automatic cutting machine has a wide application prospect.

A starting device for an internal combustion engine, especially that of a motor vehicle, comprises:

• • a stator, or inductor, comprising an inductor coil (5), said inductor coil comprising at least first (43), second (41) and third (42) windings that are all electrically connected in parallel;
  • a rotor associated with said stator and having a longitudinal axis;
  • a starter element that can be rotated by the rotor; and
  • a contractor designed to supply power, in a prerotation first phase, only to the first winding (43) of the inductor coil and, in a full-speed second phase, following the first phase, to the first, second and third windings (41, 42) of the inductor coil.