High Temperature And High Pressure Special Valves Special valve refers to can be applied to a variety of special environment and adapt to a variety of complex conditions of the valve, is a very widely used in the national economic construction and development of a general mechanical products, in energy, chemical, medicine, agriculture, food, military and other industries are playing an extremely important role. With the in-depth promotion of industry 4.0, special valves have also entered a new stage of development, and the technology and market of special valves have also undergone new changes. High Temperature And High Pressure Special Valves,Special Check Valve,High Pressure Ball Valve With Actuator,High Performance Butterfly Valves WUXI KVC-VALVE , https://www.wxkaiweixi.com
Compared with ordinary types of valves, special valves have obvious characteristics such as extremely complex internal flow, special structure, special materials and special uses. As a special valve in many valve types, it is applied to various special environments, can adapt to various complex working conditions, plays a special role and undertakes a particularly complex task. Therefore, special valves are often referred to as the "throat" of industrial pipes. More typical special valves are the main feed water regulator, pressure regulator spray valve, high pressure trap, Tesla valve, pilot Globe Valve, multistage pressure reducing valve, sleeve control valve, heart flap valve and so on. It is self-evident that the technical complexity of special valves is much higher than that of ordinary valves, which belong to high-end valve series both technically and in the market.
Causes of high temperature of vacuum pump, countermeasure and effect analysis
1 reason analysis (1) motor power, operating current, heat. (2) fewer fan blades, resulting in a small amount of wind. (3) low speed fan, wind pressure, the amount of wind is small. (4) The voltage of the bus where the vacuum pump motor is located is 380V. Due to the voltage drop of the cable and the uneven distribution of the load, the actual voltage applied by the motor is only 365V, which causes the running current to be large due to the low voltage. (5) motor with dust, oil, reducing the cooling capacity. 2 Countermeasures Motor power, speed and vacuum pump match, can not be changed. Fan mounted on the motor shaft, the motor speed determines the fan speed, it can not be replaced. Although increasing the number of fan blades can play a role, but the increase in the number of blades, the dynamic balance is not easy to find, such as finding is not good, will cause increased motor vibration. (1) Lengthen the original fan cover 40cm, install a fan with the same diameter inside the axial fan, axial fan motor power 850W, speed 1489r / min, voltage 380V. The original fan to keep. Axial flow fan set up all the way to power control, axial fan and the main motor without a chain. After the start of the vacuum pump to start the axial fan operation, the vacuum pump outage after 30min axial fan, so that the main motor is fully cooled; (2) Regularly remove the motor dust, keep the motor heat sink clean, increase its cooling capacity; ( 3) The bus where the vacuum pump voltage is adjusted to 400V. 3 Effect (1) As the axial fan speed is high, the wind pressure air volume, cooling effect is greatly enhanced in the same ambient temperature and load current, the main motor temperature dropped 12 ℃. Summer main motor temperature no longer exceeded. (2) slow down the insulation aging of the main motor, extending its service life. (3) Axial fan can be artificially controlled, the main motor is out of service, the axial fan can still run, the main motor can be fully cooled. (4) After the voltage is adjusted, the operating current of the diaphragm pump is reduced to 210A, and the calorific value is relatively reduced. (5) Try to balance the load distribution of the 2-phase busbar to prevent over-voltage drop of some busbar due to overload.