678results about How to "Eliminate shock" patented technology

This running apparatus(1) has 4 wheels(3) operating seesaw type are axle installed on the first and second lever(4.5.6). This running apparatus can travel with its 8 wheels or sometimes 4 wheels touching grounds at any circumstances. This is very suitable for the wheel chair or truck carrying special cargo running on the stairs, ramps, sands, marshy muds, rocks, and so on. And comfortability and safety of this vehicle can be maximized by the seesaw movement of the first and second levers(4.5,6,) which diminish the shock according to the ground. When converting the second levers(5) of the front wheels which can axis operates according to the ground, with rack(11) and pinion(10) make one of front two wheels contact grounds and easily convert the steering wheel(16), and also possible to change the length and width of the vehicle cope with location and speed, and can travel with all good conditions

The invention relates to a method and a system for centralized management of an electric saver of a central air-conditioner; a water flow pressure difference sensor between a water supply main pipe and a return water main pipe of a central air-conditioner freezing water system, a flow meter for a two-way freezing water return pipe, a water temperature sensor for a back-way freezing water return pipe of a freezing water pump, the water temperature sensor for a freezing water outlet pipe of an air conditioning mainframe, the water temperature sensor for a cooling water outlet pipe of the air conditioning mainframe and the water temperature sensor for a cooling water inlet main pipe of the air conditioning mainframe respectively collect pressure difference, flow speed and water temperature of the corresponding position; collection values are transferred into a fuzzy controller, the fuzzy controller gains dynamic flow and speed parameters through the control of a fuzzy prediction model and an optimal algorithm model, the dynamic flow and speed parameters are transferred into each electric saver, and the speed and the flow of corresponding fans and water pumps are controlled through the frequency change of the electric saver. The invention has the advantages of the high temperature-adjusting precision, the good dynamic performance, the small mechanical loss, the fully-automatic remote monitoring, the closed-loop control of temperature, the soft starting and stopping of a motor and the optimum system electricity-saving rate.

The invention discloses a wheel tooth type crusher which comprises a base, an casing, a main unit, two sets of drive mechanisms and a hydraulic adjustment safety system; wherein the casing is arranged on the upper side of the base; the main unit which comprises a rotor part is arranged in the casing; the two sets of drive mechanisms are arranged by both sides of the main unit; the rotor part consists of a fixed roll shaft, a movable roll shaft, fixed bearings and movable bearings; the fixed roll shaft and the movable roll shaft are arranged in parallel; the fixed bearings and the movable bearings respectively bear the fixed roll shaft and the movable roll shaft; the outer surfaces of the two roll shafts are respectively provided with a cluster of breaking teeth axially spaced from one another; the breaking teeth on the two roller shafts are axially arranged in a staggered way; the drive mechanisms respectively drive the two roll shafts to rotate in opposite directions; and the main unit also comprises a pair of cleaners and an adjustor for adjusting the gap between the two roll shafts. The wheel tooth type crusher can eliminate overload impact and vibration caused by non-breaking materials; after the breaking teeth on the two roll shafts are worn down, the relative gap and positions between the two roll shafts can be easily adjusted, thereby increasing the working efficiency of the breaking.

The invention relates to a compound control method of a speed and a position of a hydraulic cylinder system based on displacement feedback, which comprises the following steps: 1) a displacement sensor transmits an acquired actual displacement value y1 of a hydraulic cylinder piston to a controller, 2) the controller compares the actual displacement value y1 of the hydraulic cylinder with a set displacement value y0 to obtain a displacement deviation absolute value of deltay, and judges whether the displacement deviation absolute value of deltay is smaller than the set threshold, if so, executing the step 3), if not, executing the step 4), 3) the current output by the controller is rated current of a proportional valve, namely the proportional valve is totally opened, the flow through the proportional valve is maximal, and the hydraulic cylinder piston quickly moves, and 4) the controller converts the displacement deviation absolute value of deltay into an output current i according to a preset relation function, and controls the proportional valve through the output current i so as to realize fast control for the speed following the displacement. The compound control method, disclosed by the invention, has the advantages of shorter control time, lower realization cost and the like in comparison with the prior art.

The invention provides a testing system for a nuclear reactor passive shutdown device and a testing method thereof. The system comprises a hydraulic loop system composed of a pump pre-regulation monitoring module, a main circulation loop module, a bypass loop module, a testing system discharging module and a related pipeline, and an instrument, a passive shutdown device testing body composed of a supporting steel platform, a control rod sleeve, a passive control rod model and a hoisting mechanism thereof, and a measurement control system composed of a rod position measurement module, an information monitoring and acquisition module, a remote control module and a related lead wire, and a cable; a working medium which is heated to a testing temperature value starts from a centrifuge pump and is subjected to flow regulation, and then enters a test section; the working medium is used for keeping the passive control rod model suspended in the control rod sleeve through hydraulic power, flows out from the testing body and then returns back to a water tank to form closed circulation; the invention provides the testing method of the system; and the testing system provided by the invention has the advantages that a whole structure is simple and easy to operate, the cost of materials and the working medium is low, and key parts and equipment of the testing section adopt detachable designs so that the testing system is convenient to upgrade and modify.

A wheel loader (50) is designed so that when a specific first condition is met for vehicle speed, accelerator opening, engine speed, and HST pressure, the engine absorption torque curve of an HST pump (4) is switched to shift the matching point from the low-engine speed side to the high-engine speed side. On the other hand, if a second condition is met for vehicle speed and HST pressure, control is performed so that the absorption torque curve of the HST pump (4) is returned from the high-engine speed side to the low-engine speed side.

A control device for a vehicle including a motor, an engine, wherein the motor can be drivingly connected with the engine, a torque converter, a transmission mechanism for transmitting the drive torque, which is transmitted via the torque converter from the engine and the motor, to drive wheels, and a controller that controls a driving state of the motor, controls a driving state of the engine, and outputs a torque reduction command for controlling a drive torque of the motor in order to place the drive torque of the motor within a maximum input torque of the transmission mechanism, wherein the maximum input torque is calculated based on a torque ratio of the torque converter when the engine begins driving after the motor begins driving.

The invention discloses a water hammer air valve and a water hammer gas discharging method during pipeline use. The water hammer air valve comprises a valve body, a bonnet and a protective cover, wherein the bonnet is provided with an opening, the protective cover is disposed on the opening, the valve body is provided with a valve opening for being communicated with a pipeline, a high-speed gas feeding and discharging device which is used for discharging gases stayed in the pipeline during water filling to the outside and shutting down the valve after pipeline water filling is completed is disposed in the inner cavity of the valve body, the output end of the high-speed gas feeding and discharging device is communicated with the outside through the opening of the bonnet, and the valve opening of the valve body is communicated with a bottom gas discharging throttling device for limiting the gas displacement of the pipeline to the inner cavity of the valve body; a trace gas discharging device for discharging mixed, residual and/or precipitated gases in the pipeline to the outside through the opening of the bonnet after the high-speed gas feeding and discharging device shuts down the valve is further disposed in the high-speed gas feeding and discharging device. By the water hammer air valve, water hammer reduction and pipeline safety protection are achieved, blowing blocking during high-speed gas discharging is avoided, and valve closing water hammer is eliminated.

The invention provides a variable propeller device for a wind motor blade, which comprises a drive unit and a transmission gear which drives the blade to rotate, wherein the drive unit such as a hydraulic cylinder or a feed screw nut can generate linear propulsion to drive a push-and-pull rod in the transmission gear to perform linear movement; the push-and-pull rod drives a first flexible element and a second flexible element which are coated on the tail of the blade; and the first flexible element and the second flexible element drive the blade to rotate, so as to realize variable propeller. When the number of the blades of a wind motor is more than two, a linkage frame can be arranged between the drive unit and the push-and-pull rod of the transmission gear, and drives the transmission gear to perform linear movement, so as to realize synchronous variable propeller of various blades.

The invention relates to a fixed platform which enables to locate on the water any fixed structure such as the house, garden, road, airport, car park, children's park and holiday village in the seas, lakes and rivers. Our invention comprises the platform (7) where the floats (22) thereof capable of floating are submerged up to a safe zone 3-5 m from the water (10) surface, the floats (22) spending energy to come out on the water surface (5) produce forces to try to maintain the platform (7) always at the same point owing to the tightness of the ropes (3) of the floats (22) and where said platform (7) is prevented from being drifted by the violent storms and huge waves and the currents in the sea, wherein the platform (7) which is manufactured in a manner suitable for its purpose comprises the weight (4) to the end of which the ropes (3) are connected, the connecting ropes (3) serving to maintain the floats (22) at a constant distance from the floor and in submerged state, the floats (22) producing the buoyancy carried over by the platform (7), the carrier columns (21) connecting the floats (22) with the platform (7) and the connecting pieces (20) that connect the columns (21) with the platform (7).

The invention discloses an internal dual-phase shockwave swing link transmission type internal combustion engine, relates to the field of gas power, and belongs to a multi-cylinder internal combustion engine. The invention provides a novel internal combustion engine, wherein eight cylinders are annularly, symmetrically and uniformly distributed around a convex internal dual-phase shockwave wheel, so that a resultant force stressed on the convex internal dual-phase shockwave wheel is zero; a cylinder piston directly acts on the convex internal dual-phase shockwave wheel through a push rod; and power is transferred to an output shaft which is connected with a wavelike wheel through keys from the convex internal dual-phase shockwave wheel through internal dual-phase shockwave swing link movable teeth. In the internal combustion engine, a connecting rod and a crank shaft in the conventional internal combustion engine are saved, and an external cam internal dual-phase shockwave swing link transmission mechanism of the conventional internal combustion engine does not have eccentric mass and has the advantage of self-balancing the inertial force and the working load. The rotation speed of the output shaft is determined by the transmission ratio of the transmission of the movable teeth; if a movable tooth frame is fixed, the wavelike wheel outputs low speed and large torque; and the internal combustion engine can be widely applied to the fields of military affaires and national defense needing high power, such as tanks, armored vehicles, engineering machinery and the like. The internal combustion engine has the advantages of simple and compact structure, small axial dimension and self-balanced stressing and operates stably.

The invention provides a stable-switching ball screw type inerter device. The stable-switching ball screw type inerter device comprises a first mounting part, a second mounting part, a first cylinderbarrel, a second cylinder barrel, a screw nut, a screw, a flywheel A, a flywheel B, a one-way clutch A and a one-way clutch B and is characterized in that the screw is mounted between the first cylinder barrel and the second cylinder barrel in a penetrating manner, one end of the screw is rotatably mounted in the first cylinder barrel, and the other end of the screw penetrates the screw nut fixedly mounted on the second cylinder barrel and is coordinated with the screw; the first mounting part is mounted at the left end of the first cylinder barrel, and the second mounting part is fixedly mounted at the right end of the second cylinder barrel; when the motion direction of the nut instantly changes, only one of the two flywheels synchronously rotates along with the screw, flywheel impact, caused by rotation direction change, on the screw during switching is avoided effectively, stable switching is achieved, influence of nonlinear factors is small, and the performance of the inerter device is improved effectively.

A lift belt (12) for a lift installation comprises a belt body (15) in which a tensile carrier arrangement (14) with several tensile carriers (14.1, 14.2) for transmission of a tension force in longitudinal direction of the lift belt is arranged. A profile body (16) which spaces these tensile carriers from one another is arranged between adjacent tensile carriers (14.1, 14.2) of the tensile carrier arrangement (14). <SDOCL LA=EN> 12 Claims 1. Lift belt (12) for a lift installation, with a belt body (15) in which a tensile carrier arrangement (14) with several tensile carriers (14.1, 14.2) in the form of strands or cables for transmission of a tension force in longitudinal direction of the lift be lt is arranged, characterised in that a profile body (16) is arranged between adjacent tensi le carriers (14.1, 14.2) of the tensile carrier arrangement (14) and spaces these tensil e carriers from one another. 2. Lift belt according to claim 1, characterised in that a respective profil e body (16) is arranged between several, preferably between all, tensile carriers of the tensile carrier arrangement (14). 3. Lift belt according to claim 2, characterised in that all profile bodies (16) have the same cross-sectional shape. 4. Lift belt according to claim 2, characterised in that at least two profil e bodies (16) have different cross-sectional shapes. 5. Lift belt according to any one of the preceding claims, characterised in that a profile body has a substantially circular, oval (16.1), T-shaped, double-T-shaped (16.3), U- shaped, triangular or quadrangular (16.2) cross-section. 6. Lift belt according to any one of the preceding claims, characterised in that a profile body extends in longitudinal direction ofthe lift belt (12), particularly substantially over the entire lengthof the lift belt. 7.

A loading mechanism of a disc tray onto which recording medium discs such as compact discs, laser discs, or the like are set and which moves between a pull-out position at which the disc tray was pulled out of an outer casing and a pull-in position at which the disc tray was pulled into the outer casing. The engagement between the loading gear and the rack of the disc tray is released just before the pull-in operation of the disc tray is completed and, at the same time, a cam portion formed on the loading gear comes into engagement with the abutted portion of the disc tray, thereby allowing the disc tray to be subsequently pulled in by the pressing motion of the cam portion to the abutted portion. Thus, the pull-in speed of the disc tray can be reduced just before the completion of the pull-in operation of the disc tray and a shock which occurs upon completion of the pull-in operation of the disc tray can be reduced. Due to this, a shock sound by the collision of the disc tray and the member on the casing side for restricting the pull-in position of the disc tray and the shock to the disc player by such a collision are eliminated, thereby raising the quality of the disc player.

A synchronous powder spreading type metal laser 3D printing powder feeding device comprises a powder storage bin (1), a powder feeding bin (2), a powder feeding belt (3), a powder spreading head (4), a driving transmission gear (5), a driven transmission gear (6), a driving motor (7), a cross beam (18), a cladding head (19) and a shell (11). The powder feeding bin is fixed to the cladding head through a rolling bearing and rotates freely. A transmission gear is installed on the upper portion of the powder feeding bin and meshes with the other transmission gear to form a transmission gear pair, and preset movement is achieved under driving of the motor. The powder storage bin stays still but keeps sliding relative to the powder feeding bin. Powder enters the powder feeding belt from a bottom outlet of the powder feeding bin, is fed to the powder spreading head under driving of a driving wheel and is evenly spread on a base plate under the action of gravity to form a powder layer. The powder spreading head and the shell are together fixed to the cladding head. The powder feeding bin and the cladding head move coordinately through procedure setting, the effect that the powder layer is always directly in front of a laser spot is ensured, and circulating water is adopted for cooling in the powder spreading head.

The present invention discloses a no-collision spring steel ball safety clutch, which has the characteristics of no overload impact or no collision, high rotating speed, simplicity and reliability, easy manufacture, and long service life. The present invention is characterized in that the no-collision spring steel ball safety clutch is provided with a blocking embedding mechanism preventing a steel ball embedding mechanism from being embedded under the overload condition, the mechanism on the axial direction is positioned in the steel ball embedding mechanism, and the mechanism on the radial direction is positioned in the steel ball embedding mechanism or outside the steel ball embedding mechanism; a lift angle of both sides blocking the working surface is formed to enough ensure the friction self-locking collided on the both sides and the stability of the blocking operating condition, in order that the lift angle has the capabilities that the adaptive axle base is changed and the abrasion is automatically compensated; no collision characteristic of the overrunning operating condition of the two embedding mechanisms, and the separating block of the blocking embedding mechanism and the absolute reliability of the embedding return process are maintained for a long time. After the overload separation, the positive rotation or negative rotation which is simple and convenient can evenly realize the embedment replacement of the clutch automatically.

The invention discloses a control method for high-power reactive and harmonic dynamic hybrid compensation method. The hybrid compensation system comprises an SVG (static var generator), a TSF (thyristor switched filter) group and a controller, and the SVG and TSFs are parallelly connected to a grid. The three-phase current of the grid between the SVG and the TSFs is taken as a detection object, voltage and current values collected by sensors are processed through the controller, switching signals of the TSFs are acquired according to hybrid logic judgment, most of the reactive power of loads is compensated in a graded manner, and specific subharmonic is filtered out; control parameters of the SVG are acquired according to an instantaneous-power theory, and the surplus reactive power and harmonic of the loads are continuously compensated. A cost-effective scheme for rapid continuous compensation of the high-power reactive and harmonic is provided, impact of switching of passive equipment on the grid can be completely avoided, and harmonic current is avoided flowing to the grid, so that the control method is energy saving, emission reducing, green, environment friendly, good in social and economical effectiveness, wide in application range and especially applicable to the field of oil drilling.

The invention relates to a sump well for a vacuum drainage system. The sump well comprises a collection well, a sewage pumping pipe, a drainage pipe, a vacuum valve, a controller for controlling connection and disconnection of the vacuum valve and a water level sensor for collecting water level information, wherein the outlet of the drainage pipe is connected into a vacuum pipeline, and the inletof the drainage pipe is connected with the outlet of the sewage pumping pipe through the vacuum valve; the inlet of the sewage pumping pipe extends into a sewage pumping level in the collection well;and a signal output end of the water level sensor is connected with a signal input end of the controller. Along with sewage collection in the well, the sump well drains automatically and intermittently to the vacuum drainage system, has a simple structure, and does not require a lift pump, so that the problems of being low in safety, easy in blockage, difficult in cleaning, high in power consumption and the like caused by assembling the lift pumps on multiple points can be avoided, and sewage collected by gravity flow can be lifted to the vacuum drainage system without extra additional power,and the sump well is convenient to check and maintain.