Y SeriesHydraulic dynamometerManualShanghai LINYAOPower Test Equipment Co., Ltd.2011-10ForewordY series hydraulic dynamometers are used electric drain valve control. That is, by changing the valve opening to change the size of the absorbed power. Braking power range from 20KW to 5900KW, full range of domestic and foreign users according to their range of engine power to choose the right model to buy.The product is mainly used to detect a variety of diesel, gasoline, motor and other power machine of effective power. Is a power machine characteristics test, test the efficiency of transmission machinery essential test equipment. The basic product is a one-way test, user test for both two-way ordering, please request, our company has given special customization.Technical Specifications1. Features◆Small size, easy to install;◆Simple structure, convenient operation and maintenance;◆braking torque;◆high accuracy;◆stable and reliable;◆magnetic-electric speed sensor for high accuracy measurement of the instantaneous speed;◆electric control valve fast load control;Performance MeasurementProject types range sensor accuracy RemarksSpeed ZSB magnetoelectric speed sensor 300-7500r/min ± 1r/min than 7500r/minWhen the wheel speed and control of the separate componentsoutside the grounds.Torque strain gauge pressure sensor and pull the dynamometer scale matching ± 0.2% FSPrecision potentiometer valve position(DPF, YZ60 water gate actuator) 0-100% 0.2% F.SPrecision potentiometer throttle position(YZ60, YZ60A throttle actuator) 0-100% 0.2% F.S3.Technical parametersThe Unit：mmDynamometer structureY-type hydraulic dynamometer mainly by body parts, body parts measured force, into the drainage components, calibration components, electric drain valve parts, auto-adjusting device composed of parts and lubricating parts. See Figure II (a), (b).1. Body partsBody parts is to use the dynamometer to absorb water, the main components of the effective torque power machine. Figure three (a), (b).Power machine output mechanical energy into heat in here, by the absorption of water into the shell in the discharge away, a very small part by the dynamometer casing wall heat to the air.Its simple structure from the one in the rolling bearing can swing on a rack in the shell and composed of the rotor on the spindle. Dynamometer rotor mounted on the spindle center, left and right side of the bearing shell and the shell were symmetrical around the rotor mounted on both sides, left and right side of the rotor shell pits and pit forming the working chamber. Shell around the bearing housing connected with bi-metal sleeve bushing play a role in both, also played a role in sealing water. Y1500, Y2500, Y3300, Y5900-type dynamometer in order to prevent water leakage from the gap sealed to prevent water from entering the bearing to ensure that the bearing life.Shell has opened a drainage hole, so the bearing shell has opened a water hole, in order to ensure the entry of cold water and hot water discharge. Around the bearing housing has a overflow pipes, dump the water cycle through the overflow pipes of water thrown into the base after discharge.Installed at both ends of the spindle taper coupling, speed gear with one side, through the speed sensor, spindle speed can be displayed in the digital display table.1, the body part2, part3 dynamometer, lubricated parts4, into the drainage unit5, calibration parts6, the automatic adjustment device components1, the base2, bearing3, the coupling4, the spindle assembly 5, the bearing shell6, shell7, the side shell8, the rotor9, the speed sensor10, speed gearDynamometer body partsInstitutional component force measurement system for the determination of power, see figure IV (a), (b).Mainly by the brake arm, pull the pressure sensor and the live bolt and other components. Body parts of the braking torque generated by the brake arm and pull the anti-torque equilibrium pressure sensor, the electronic digital display instrument displays braking force size. Course of their work to protect the sensor, at the end of the live bolt installation of a nylon ring or rubber ring, a cushion, while the transport in order to prevent damage after by the vibration sensor, with support for fixed protection devices, in use to be loose on fixed sensor bolts, pull to the side of the activities of the board, as long as no active plate to bolt to spin.1, the brake arm2, mounting bolts3, live bolt4, pull the pressure sensorCorrection component (statics parts) Correction component dynamometer is used as the school's use of staticIt is mainly from the calibration arm, hanging hook parts, boom, pallets and weight and so on.Dynamometer spindle center to statics arm triangle edge weight from the total weight of the L value and W below.L及W值Correction component diagram1, calibration arm2, parts hanging hook 3, the boom4, tray 5, the weightWorks and power calculations1、 WorksPower generator driven by the dynamometer coupling on the rotor shaft synchronized rotating components, stirred the working chamber in the water. As the centrifugal force generated by the rotor and the rotor rotating the role of pits, water pits in the side of the shell and the rotor between the strong water vortex, it is a rotational torque to the shell, so that the torque power machine passed by the rotor casing, mounted on the shell shell on the brake arm will rotate with an angle, which will force the system to pass and pull the brake arm connected to the pressure sensor, the electronic digital display device the size of the braking force.Dynamometer through the electric drain valve control valve opening, or through the automatic adjustment device controlled drainage actuator, control valve actuator by the drainage of the opening, to change the dynamometer working chamber pressure to change the absorption of water power size. At the same time the speed of the dynamometer measured by the speed sensor, the electronic display on the instrument display.Because it is pressure-controlled hydraulic dynamometer, but also by changing the valve opening pressure to adjust the working chamber, the whole process must be automatic closed-loop control system, so the pressure Y-type dynamometer must be equipped with automatic control of power control cabinet to run the job.2、 CalculateP= F n/ 9549 (kw)F---Torque Nmn--- Speed r/minWater supply system1 dynamometer cycle of water supply systems of watersupply available. The use of high or low voltage supplyregulator tank plus pipe pump pressurized water tank.General North is the use of low-voltage indoor water tankwater tank in the form of additional pipeline pump (seefigure VIII).2 dynamometer at the water inlet pressure can be greater than or equal 0.05MPa, generally 0.05 ~ 0.15MPa, when the dynamometer at full water line work, required water pressure higher; below the waterline work full time, pressure can be lower. Water pressure should remain stable, the pressure fluctuations in the range of ±5KPa. Dynamometer work, the water pressure will directly affect the dynamometer pit side shell and rotor cavitation of the working chamber.3 dynamometer work process, the water can not be stopped. Into the water about 20 liters per kilowatt-hour or so, drain the temperature can not exceed 70 ℃, general economic drain temperature between 55 ~ 60 ℃.4-cycle cooling water system consists of reservoirs, pumps, tank regulator, drainage into the connecting pipe, pressure gauge, valves and other components. Pool volume should be considered and measured maximum cooling power of water consumption, and a certain amount of surplus water during the cycle to compensate for the dissipation, in the conditions permit, the proposed pool as possible to increase the volume. Volume of tank water consumption should be considered when the maximum voltage supply (water consumption technical parameters see table). Water than the pump's maximum power dynamometer water consumption, the regulator for the water tank volume can be recommended about 2 ~ 5 M3, a small amount of water less desirable value, the desirability of greater water consumption. Pool volume is generally about five times the tank volume. Able to do so, as far as possible larger.5 into, drain diameter should fit into the outlet diameterdynamometer requirements6 Way inlet valve should be connected in series one and a pressure gauge. Valve for regulating the water pressure, for a fixed engine type, once it is set after the general no longer move, so the valve can be mounted in any convenient location, and the dynamometer on the inlet valve is used to open and close the water supply.7 Drain line and generally larger than the inlet pipe diameter. Clay pipe leading to the pool drain can be used to make the loop. If the user can be discharged into the sewer water rich. Drain line should pay attention to two issues, namely, drainage overflow pipes can not be compared with the collusion, the pressure is too high to prevent the drainage overflow pipes back to the irrigation; second drain if not smooth, it will cause excessive back pressure, the impact normal dynamometer test. Therefore, piping arrangements should be as short as possible and bend less.8 Circulating water through the device after cleaning water as the dynamometer, the dynamometer will be reduced in scale formation. If there is no water treatment equipment, allowing use tap water or clean water, but there is mixed with sand and otherimpurities. Not to use seawater. According to different regions of the PH value of water is not too high, consider whether you need to install cleaning devices.Dynamometer calibrationDynamometer based on static correction. Statics general design for the arm 1947.5mm. The weight placed on the 10 kg weight plate, the corresponding display 200 Newton; 20 kg display 400 Newton. . . . . . .Due to structural reasons, such as arm length zoom in or out a certain multiple of the value, the display should also be enlarged or reduced as appropriate multiples.Correction steps:1, correction level of the dynamometer. Dynamometer installed base in two mutually perpendicular horizontal level degree ≯ 1 / 1000.2, the coupling with the engine dynamometer separate, remove the weights, and put on correct arm, hanging weight plate. Newly installed dynamometer should be noted that the sensor protection device on the loose bolts, pull to the side of the activities of the board.3, connected to the power cabinet, 1 minute warm.4, the load table shows zero, zero through the instrument.5, increase in weight plate standard weight, the weight of full-scale one-time added about 80%, and adjust the instrument so that the load weight increases the displayed value with the corresponding weight. Remove the added weight, load the table should be back to zero.6, add or subtract load test sequence (gradually added to the full scale, then in turn load shedding to zero), the weight values point by point with the digital value corresponding to a linear relationship, repeatedly adjusted until the required accuracy. Otherwise, you should find out the ultra-poor reasons. Ruled out, then repeat the above operation. When the test range is small, in order to achieve high calibration accuracy can be corrected only in this range. 7, the correction is completed, open the correct arm, re-fitted with weights, and the coupling with the engine dynamometer connected well.New dynamometer installed, usually in need of correction, the long-term set aside by the dynamometer, the dynamometer using about half a year or in use when an abnormality is detected, are required to be linked to the dynamometer's weight static correction.The use of dynamometer1, before starting(1) Turn on the instrument(2) Check the coupling and shaft coupling situation.(3) Check the power machine and dynamometer concentricity.(4) Check into the effluent pipe connection system and circulation.(5) cleaned surface, the lubricating oil filling point, and turn the spindle, check whether the rotor and other parts of the collision and rotation is not flexible and so on.(6) correction to meet the requirements.(7) drain valve fully open (minimum load position).2, boot test(1) start the power generator driven by the dynamometer to the same spindle rotation speed, until the power machine in normal operation, you can test. (2) all entered the water valve to regulate the size of the drainage valve opening, until the working conditions with the power machine is consistent. (3) external characteristics of the engine is doing, speed characteristics, load characteristics and other characteristics of the test, choose and dynamometer control cabinet matching the constant position, constant torque, constant speed four control methods.(4) For some engines, sometimes in a fixed dynamometer under the pressure of the water supply can not meet all the requirements of the operating point of the test, which can be appropriate in different experimental conditions regulating water supply pressure.3, end of the trial(1) close the inlet valve.(2) drain valve fully open.(3) the engine is running at low speed after a few minutes downtime.(4) rotation sensor protection device, so that the stator showing lock status sensor from power.(5) connected to the power cut off and the cabinet.(6) stop the oil lubrication system.(7) If a long time do not do testing, dynamometer need to open the bottom drain valve, put to the water,Water use in order to prevent the bearing, be sure to remember! ! ! "First boot, after the turn on the water; first off the water, then stop" principle. Dynamometer in the rotation to ensure that state water, but should prevent dynamometer continuous operation in the anhydrous state for too long and burn sealing components, (requiring anhydrous state at time of less than 2 minutes).Dynamometer maintenance and repair1, the installation and use should be sent to the person responsible for the use of personnel must fully understand the use of the dynamometer.2, the dynamometer to the factory to make a comprehensive inspection. From the date of manufacture when used as a long, action must be part of the inspection and maintenance.3, the power machine and hydraulic dynamometer can not be a collision.4, in the testing process, such as a strong vibration, should immediately stop the test, check the reason, troubleshooting, to ensure smooth operation of the dynamometer.5, the temperature is below +5 ℃, the water supply system should be prepared to freeze work.6, the lubricating points by the specified time, the provisions of the lubricant for lubrication.7, the test is completed, drain valve should be open, so that the water inside the dynamometer exhausted, and wipe with a cloth on the surface of water, reduce corrosion.8, regularly examine and adjust the speed sensor and the magnetic gap between the speed gear, (σ = 0.5 ~ 1.0mm), to prevent loosening and damage to the gun head.9, six months after the use of the dynamometer, or find statics accuracy mainly the need to re-statics.10, in the disassembly when the dynamometer maintenance, users must pay attention to, so the dynamometer end parts can not be mixed. Because the left and right side are shims, and gaskets are adjusted by the axial compression coupling on the shaft axially fixed bearing, if necessary, by factory for repairs.11, coupling the installation must be aligned with the spindle shaft mark line location, so do not allow the wrong tune. Coupling is fixed by special hydraulic assembly and disassembly tools, so that the radial coupling expansion, while the axial compression methods, and various dynamometer coupling into the amount of pressure are different, so do not have certain conditions, users can not easily dismantle. (User orders dissecting set of hydraulic assembly and disassembly tool).12, dynamometer repairs, even after the original parts after disassembly must also re-static correction. Each dynamometer and electrical and mechanical balance of the factory is ready FBI work, so even if the same type of dynamometer parts should not be interchangeable.。