Jiangsu Lanling Electromechanical Technology Co., Ltd., a national high-tech enterprise, a private technology enterprise in Jiangsu Province, a designated supplier of China Jiuquan Satellite Launch Center, and a graduate student workstation in Jiangsu Province. Founded in 2002, the company specializes in magnetic powder (eddy current, hysteresis) brake / clutch, torque speed sensor, various types of power equipment (pump valves, actuators, reducers, motors, generators, etc.) dynamometer, testing Development and production of Taiwan and control instruments. The company has passed ISO9001 quality system certification, ISO14000 environmental management system certification, OHSAS18001 occupational health and safety management system certification, and has the right to import and export products.

       The company has a technology research and development center, foundry workshop, welding shop, tension controller workshop, air shaft shaft workshop, sensor workshop, dynamometer system workshop, quality inspection center and other departments, and has Beijing branch, Shanghai office, Shenzhen office. The company has extensively cooperated with universities and research institutes to continuously improve the level of intelligence of products. The complete quality management system, first-class processing equipment and testing methods provide a strong guarantee for the company's product quality. Company products are exported to the United States, Italy, Turkey, Chile, India and other countries. Over the years, the company's product quality and sales have been at the forefront of the industry. Excellent product quality and perfect after-sales service have won unanimous praise from customers.

       Jiangsu Lanling Technology has been focusing on pumps, actuators, reducers, motors, generators and other industries for many years. It specializes in the design and production of test systems for torque, tension, efficiency, life, noise, vibration and temperature rise.

       Typical customers in the industry are:

       Electric actuator: Yangzhou Electric Power Construction, Changzhou Power Station Auxiliary Machine, Yangzhou Hengchun Electronics;

       Hydraulic actuator customer: Zhejiang Tiantai automatic control;

        Pneumatic actuator customers: Wenzhou Jimai Technology, Shanghai Bangshao Automation, Shanghai Zesi Technology;

       Straight-stroke actuator: Beijing Tairunge, Yangzhou Hengchun Electronics Co., Ltd.;

       Worm gear box test bench: Wenzhou Yuezhong Technology, Shanghai Qizhong, Zhejiang Dagong, Wenzhou Weibo, etc.

       Lanling Technology adheres to the enterprise tenet of “continuous improvement, honesty and trustworthiness, long-term service”. We are willing to provide our customers with advanced technology, superior quality and reasonable price test equipment, and work together for “Made in China 2025”.        Pneumatic actuator mechanism inspection standards and methods

       Calibration preparation and visual inspection

       1. All test instruments must be preheated for 30 minutes in advance;

       2. The test gas source pressure should meet 0.6 ± 0.1 MPa;

       3. There is no obvious damage to the appearance of the actuator, and the gas guiding copper tube has no obvious scar and is assembled firmly;

       Inspection standards and methods

       1. Fix the pneumatic actuator (pneumatic actuator) on the calibration table, respectively connect the air source, control gas source and displacement detection link; adjust the instrument on the calibration table accurately;

       2. Mechanical zero calibration: input 4mA current signal (0%), control gas signal should be 0.02 MPa, then the cylinder piston stroke should be zero; if not zero, adjust the zero point by adjusting the nut on the zero adjustment screw ( The zero point is high and the nut is tightened; the zero point and the range need to be adjusted repeatedly; the zero point error is ≤1%;

       3. Mechanical full-scale calibration: input 20mA current signal (100%), control gas signal should be 0.1 MPa, then the cylinder piston stroke should be the upper limit; if it is not the upper limit, adjust the tension of the tension spring To adjust the range (small size of the loose spring, the range is large tension spring); zero and range need to be adjusted repeatedly; full scale error should be ≤ 1%;

       4. Mechanical positioning midpoint positioning: After zero point and span calibration, input 12mA current signal (50% 0.06 MPa,), adjust the position of the position transmitter connecting rod so that it should remain perpendicular to the horizontal plane at this point;

       5. Full-stroke deviation calibration: input control gas signal 0.02 MPa (0%), then gradually increase the input signal 0.036 MPa (20%), 0.052 MPa (20%), 0.068 MPa (60%), 0.084 MPa (80%) 0.1 MPa (100%), the cylinder piston is completely stroked, and the deviation of each point is ≤1.5%;

       6. Nonlinear deviation test: input control gas signal 0.02MPa (0%), then gradually increase the input signal until 0.10 MPa (100%), then reduce the signal to 0.02 MPa (0%), 0.008 MPa to make the actuator go Complete stroke control engineering network copyright, and record the stroke value corresponding to each increase and decrease signal pressure, the actual pressure ━ stroke relationship and the theoretical value between the nonlinear deviation ≤ 1%;

       7. Positive and negative stroke variation test: The same as the nonlinear deviation test method, the actual difference between the positive and negative pressure ━ stroke relationship, the maximum difference between the positive and negative stroke values of the cylinder piston under the same air pressure value is ≤ 1%;

       8. Sensitivity test: increase and decrease the air pressure at the signal pressures of 0.03, 0.06, and 0.09 MPa respectively, and test the signal pressure change value required when the cylinder piston rod starts to move 0.1 mm, and the maximum change is ≤ 0.2%;

       9. Sealing test of piston cylinder: Connect the pressure of 0.5 MPa into any air chamber of the cylinder, and then cut off the air source. Within 10 minutes, the pressure drop in the cylinder should not exceed 0.01 MPa;

       10, position transmitter electrical zero detection: open the position transmitter cover, connect the wire; input 12mA current signal (0.06 MPa), at this time adjust the circular eccentric wheel inside the transmitter, so that the black line above The white line above the board is aligned; then input 4mA current (0.02 MPa), then adjust the zero potentiometer in the transmitter to make the output current 4mA; the electrical zero error should be ≤1%;

       11, position transmitter electrical full-scale detection: input 20mA current signal (0.1 MPa), at this time can adjust the transmitter within the range potentiometer to make the output current is 20mA; electrical full-scale error should be ≤ 1%;

       12, position feedback current full stroke deviation calibration: input 4mA current (0%), then gradually increase the input signal 8mA current (25%), 12mA current (50%), 16mA current (75%), 20mA current (100%) Considering the nonlinear error of linear displacement converted into angle change, 0%, 50%, 100% point feedback current error should be ≤1%, 25%, 75% point feedback current error should be ≤2%;

       13. Position feedback current forward and reverse stroke variation test: the same as the positive piston reverse stroke variation test method, the actual positive and negative position feedback current ━ stroke relationship, the maximum difference between the positive and negative stroke values of the cylinder piston under the same feedback current value Value should be ≤ 1%;

       14. Make a verification record, fill in the contents of the verification record form item by item, and the inspection personnel must sign it;

       15. After the above tests are completed, the terminal block of the position transmitter should be inserted, the back cover should be tightened, and then the air source inlet of the pneumatic valve positioner should be blocked with a plastic plug.