renewable energy
Wind power is a growing, clean renewable energy source. Whether it is a single unit or a combined unit of wind farms, they are all new energy sources that are developing rapidly in the world. The principle of wind turbines is to convert wind mechanical energy into electrical energy. Wind power can range from 500 kW to 6 MW. The wind turbines commonly used by zui are horizontal axis arrangements. Some are three-bladed, upwind and with yaw control, while others are two-bladed, downwind, naturally rotating with the wind. Occasionally you will also see vertically arranged wind turbines, also known as Darrieus wind generators, named after French inventors. But this kind of fight
The egg-shaped design is not very popular and is gradually being replaced by wind turbines with better horizontal performance.
Wind turbines and low-speed motor-driven fans, such as cooling towers, have many similarities. The wind turbine is basically a large low-speed fan, but it is not powered by electric energy. It does not drive mechanical energy to drive large low-speed fans through the gearbox. Instead, it provides mechanical energy to drive the generator to generate electricity. This reverse process has many rotating parts that generate vibration, and long-term losses can cause the zui to fail.
• Maintenance costs are very high • Impossible working height • Power loss is expensive
Low frequency acceleration vibration sensor
The speed of the main bearings and shafts is approximately 30-60 rpm . This is also the rotational speed of the input shaft of the gearbox. A low frequency acceleration vibration sensor should be used in the case of a rotational frequency range of 30 – 60 cpm (0.5 – 1.0 Hz ) . The range of measurement includes spindle rotation frequency, blade passage frequency, main bearing frequency, gearbox input shaft bearing frequency and gear meshing frequency, and so on. These low frequency acceleration vibration sensors typically provide a frequency range of 500 mV/g and 12-180000 cpm (0.2 – 3000 Hz ) .
Universal acceleration vibration sensor
Both the intermediate shaft and the output shaft of the gearbox have a relatively high rotational speed and produce a higher disturbance frequency than the bearing and gear meshing. In fact, the output shaft's rotational frequency is typically 50-60 times higher than the input shaft . Measuring the high rotational speed of the gearbox and generator set that it drives requires the use of a universal accelerometer. The universal accelerometer provides a frequency range of 100 mV/g and 30 – 900000 cpm (0.5 – 15000 Hz )
Bolt-mounted acceleration vibration sensor
Wind turbines are usually on very tall towers. The rotating components are difficult to access, so it is good to use bolts to mount the acceleration vibration sensor. Mounting planes such as main bearings, gearboxes and generators all need to machine the orifice plane, turn holes and tap to install the vibration sensor.
Cables and connectors
Wind turbines require a reliable IP66 connector to prevent the ingress of dust, water or oil. The A2A Military Style Connector or B2A Sealed Connector provides a reliable connection to the vibration sensor. Teflon jacket cable or polyurethane cable and connector can be used to provide a complete connection solution for vibration sensors.
Power generation is one of the important needs of today's world. Whether the generator set can work normally is the main concern. For wind turbines, failure of major bearings, gearboxes and generators is not acceptable. The replacement of these components will be very expensive and heavy, and the installation location is at an altitude of 50-100 meters. Installing a permanent acceleration vibration sensor on a wind turbine can detect the following problems:
• Gear failure • Gear wear • Impeller vibration • Electronic fault
• Unbalanced • Misaligned • Loose • Resonant
Ventilation is one of the most important components in a successful greenhouse.
If there is no proper ventilation, greenhouses and their growing plants can become prone to problems. The main purposes of ventilation are to regulate the temperature and humidity to the optimal level, and to ensure movement of air and thus prevent build-up of plant pathogens (such as Botrytis cinerea) that prefer still air conditions. Ventilation also ensures a supply of fresh air for photosynthesis and plant respiration, and may enable important pollinators to access the greenhouse crop.
Greenhouse Circulation Fan,Greenhouse Ventilation Fan,Automated Greenhouse Ventilation Fan
JIANGSU SKYPLAN GREENHOUSE TECHNOLOGY CO.,LTD , https://www.thgreenhouse.com