Beijing Laifuji Plaza: JB type centrifugal fan floor damping butterfly valve electric butterfly valve
JB damping butterfly valve electric butterfly valve Main purpose: JB damping butterfly valve shock absorber is applicable to various water chillers, cooling towers, floor fans or floor air conditioning boxes and other equipment.
Installation instructions for JB type damping butterfly valve electric butterfly valve: Before installation of JB type damping butterfly valve electric butterfly valve, please confirm whether the model, specification and model of electric butterfly valve are correct. The compression capacity of electric butterfly valve is generally 10-25mm. After the electric butterfly valve is placed in the correct position, it is necessary to remove the fixing bolts first, and then install the fixed foot of the equipment on the electric butterfly valve and fix it. First, fix the electric butterfly valve with foundation bolts. Adjust the height of the electric butterfly valve to make the equipment level. Adjust the nut in a clockwise direction upward and counterclockwise direction downward, and then connect the pipeline after the horizontal adjustment. If the load of the electric butterfly valve is increased for the connecting pipeline beside the machine or water tower due to the addition of suspended pipeline, the electric butterfly valve of the pipeline must be additionally installed to avoid insufficient load of the electric butterfly valve.
Introduction to Beijing Laifuji Plaza centrifugal fan:
Centrifugal fan mainly consists of impeller, casing, coupling and shaft. Impeller is the main power component that generates wind pressure and transmits energy; The casing is mainly used to introduce gas and exhaust gas, while transforming part of the kinetic energy of the gas into pressure energy; Coupling is used to connect motor and fan to transmit torque; Install and fix the impeller on the shaft, and connect it with the motor through the coupling. When the impeller rotates, the gas between the blades of the centrifugal fan is subject to centrifugal force to obtain kinetic energy (dynamic pressure head), which is discharged from the periphery of the impeller. It is guided by the volute casing to flow to the outlet of the fan, thus forming a negative pressure at the center of the impeller, making the external air flow source continuously flow into and supplement, so that the fan can discharge gas. The motor transmits the power to the fan impeller through the shaft, and the impeller rotation transmits the energy to the air. Under the effect of rotation, the air generates centrifugal force, and the air spreads around along the blade of the fan impeller. At this time, the larger the fan impeller is, the greater the energy received by the air, that is, the greater the pressure head (air pressure) of the fan. If the large impeller is cut down, the air volume will not be affected, but the air pressure will be reduced. Centrifugal fan is mainly composed of impeller and casing. The impeller of small fan is directly installed on the motor. Medium and large fans are connected with the motor through coupling or pulley. Centrifugal fan generally adopts single-sided air intake and single-stage impeller; Double side air intake is available for large flow, and two back-to-back impellers are used, which is also called double suction centrifugal fan. The impeller is the main component of the fan, and its geometric shape, size, number of blades and manufacturing accuracy have a great impact on the performance. Only when the impeller is calibrated by static balance or dynamic balance can the fan rotate smoothly. According to the different outlet directions of blades, impellers are divided into three types: forward, radial and backward. The blade and part of the forward impeller incline to the rotation direction of the impeller; The blade part of the radial impeller is radial, which is divided into straight blade type and curved blade type; The blade of the backward impeller inclines to the reverse direction of the impeller rotation. The pressure generated by the forward impeller is large. When the flow and revolution are fixed, the required impeller diameter is small, but the efficiency is generally low; Contrary to the backward impeller, the generated pressure is small, the required impeller diameter is large, and the efficiency is generally high; The radial impeller is between the two. The profile of blade is straight blade, simple, wing blade and complex. In order to have a proper velocity distribution on the blade surface, curved blades, such as equal thickness circular blades, are generally used. The impeller usually has a cover plate to increase the strength of the impeller and reduce the gas leakage between the blade and the casing. The connection between blade and cover plate shall be welded or riveted. The welded impeller has light weight and smooth flow channel. The impellers of low and medium pressure small centrifugal fans are also made of aluminum alloy.
Introduction to resonance caused by fixing parts of centrifugal fan: causes:
1. The cement foundation is too light or poorly grouted or the plane size is too small, which causes the fan foundation to be disconnected from the foundation, the anchor bolts are loose, and the connection of the machine base is not firm enough to make the foundation stiffness insufficient
; 2. The rigidity of fan base or volute is too low;
3. The inlet and outlet pipes connected with the fan are not supported and soft connected;
4. The adjacent facilities are too close to the foundation of the fan, or they are too small;
1. Reinforce the foundation or re grout and tighten the nuts; Handling method:
2. Strengthen its rigidity;
3. Support and soft connection;
4. Increase stiffness;
Introduction to Fuji Plaza in Beijing:
Beijing Raffles Plaza is located at the southwest corner of Dongzhimen Flyover in Beijing and the core business district of East Second Ring Road. It is adjacent to Dongzhimennei Street in the north, East Second Ring Road in the east, adjacent to the second embassy area, and surrounded by office buildings, shopping malls, hotels and cultural centers. It consists of office buildings, retail malls, ancillary buildings and parking lots. CapitaLand Group will build it into a comprehensive project integrating high-end apartments, business office buildings and retail malls. Beijing Raffles Plaza was completed in 2009, and the underground is directly connected to the Dongzhimen traffic hub. With the rail transit, the East Second Ring Road and the airport expressway, it is a convenient transportation network and an excellent geographical location. The mechanical and electrical system construction drawing of this project is designed by Beijing Yi An Yi Mechanical and Electrical Technology Co., Ltd. As an important part of Raffles Plaza, Raffles Shopping Center plays an important role in the whole Raffles Plaza. Raffles Shopping Center has many world famous brands, such as H&M, ZARA, BERSHKA, MANGO, etc., which provide customers with fashionable items that are in line with the world trend. As time goes by, Raffles Shopping Center is also constantly adjusting its brand composition according to the changes of trends and consumer tastes, Strive to provide consumers with a shopping experience that is always at the forefront of the world trend.
Shanghai Dongfeng Pump Valve Factory provides Beijing Laifuji Square with centrifugal fan floor damping butterfly valve electric butterfly valve products, which are light and solid in appearance and easy to install, and are suitable for various mechanical internal vibration damping devices. The butterfly valves are subject to heat treatment, ED rust prevention, paint baking and other procedures. The load deflection of 20mm and 40mm can effectively eliminate the vibration of mechanical structure. Bottom anti sliding, easy installation, high safety, easy control and adjustment, can effectively eliminate floor vibration, and the price is relatively cheap. Official website of Shanghai Dongfeng Company: //www.dongfengfamen.com/ Tel: 021-61551911