Working principle of high-pressure centrifugal blower

2022-06-14 14:06
When the impeller turns, due to the centrifugal force, the vane causes the gas to move forward and outward, thus forming a series of spiral movements. The air between the impeller blades rotates spirally and squeezes the gas outside the pump body into the side groove (inhaled by the suction port). When it enters the side channel, the gas is compressed, and then returns to the impeller blades to accelerate rotation again. When the air passes through the impeller and side grooves along a spiral track, each impeller blade increases the degree of compression and acceleration. As the rotation progresses, the kinetic energy of the gas increases, making the pressure of the gas passing through the side channel further increase. When air reaches the connection point between the side groove and the discharge flange (the side passage Narrows at the outlet), the gas is extruded from the blade and discharged from the pump body through the outlet muffler. 02 High pressure centrifugal fan installation precautions installation site ------- must be installed in an indoor place free from wind and rain, environmental temperature -------40℃ relative humidity -------80% air quality ------- If the air contains acid, alkali and other corrosive or flammable gases, should not be transported by high pressure blower, To avoid the occurrence of dangerous dust protection ------- there are a lot of dust, powder three-dimensional or fiber and other places should be avoided, if necessary in such occasions, please install filters, and regularly clean the dust attached to the filter screen and high pressure blower inside the ventilation and heat dissipation ------- please choose to use in well-ventilated places, Do not use storage space in airtight room or airtight box ------- for convenient row maintenance or repair, please avoid installation in too narrow place to avoid vibration -------- please install in place without vibration; If the vibration of the site is unavoidable, anti-vibration measures should be installed to avoid the damage of the high pressure blower caused by external vibration. Industrial vacuuming 2. filling equipment 3. central feeding system 4. cleaning and drying equipment 5. Textile machinery 6 screen printing equipment 7 woodworking machinery 8 electroplating equipment 9 PCB board equipment 10. Laser equipment 11. Swimming pool equipment 12. Tunnel engineering 13. The flow rate of the fan refers to the volume of gas flowing through the fan per unit time. The unit is M3 /h, m3/min and m3/s. In the domestic fan is used to m3/h, and the blower is used to m3/min, but in the design and performance calculation of the fan is mostly used m3/s. It must be noted that the volumetric flow of the ventilator refers to the volumetric flow of the "inlet" of the ventilator, because the pressure of the ventilator is different on the flow section, the volumetric flow through the flow section will be different. 2. The total pressure of the full pressure fan is defined as the difference between the total pressure on the outlet section of the fan and the total pressure on the inlet section. The total pressure of the flow at a point or section is equal to the sum of the dynamic and static pressures at that point or section. 3. The dynamic pressure of the fan is defined as the pressure represented by the kinetic energy of the gas on the outlet section of the fan. Or: Dynamic pressure is the pressure required to accelerate a gas from zero speed to a certain speed. The dynamic pressure is proportional to the kinetic energy of the flow. The dynamic pressure only acts in the direction of the flow and is always positive. Pd = 0.5 * * rho V % p2 p % % * * b type Pd = dynamic pressure Pa rho = gas density in kg/m * * * p p3% % % b V = speed m/s. 4. The static pressure of the static fan is defined as the dynamic pressure of the fan removed by the total reduction of the fan. In fact, static pressure is the pressure difference between the absolute pressure at a point in the flow or a point in gas-filled space and the atmospheric pressure. The pressure at this point is positive when it is higher than the atmospheric pressure, and negative when it is lower. Static pressure energy acts in all directions of a gas, independent of velocity, and is a measure of the potential in the gas. Ps = P%* P%* pt%* B-PD where Ps = static pressure PaPt = full pressure PaPd = dynamic pressure Pa5. Shaft power The shaft power of the fan refers to the power required by the fan. It includes the internal power of the fan and the mechanical loss of bearings and transmission devices. Shaft power is also referred to as fan input power and is actually the output power of the motor.

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