Expert Knowledge on High-Pressure Centrifugal Blowers
Operating Principle of High-Pressure Centrifugal Blowers
When the impeller rotates, centrifugal force causes the gas to move forward and outward, creating a series of spiral movements. The air between the impeller blades rotates in a spiral pattern, and the gas accelerated on the outer side of the pump body is pushed into the side channels (drawn in through the inlet ports). After entering the side channels, the gas is compressed and then returns to the impeller blades to be accelerated again. As the air travels along the spiral path through the impeller and side channels, each impeller blade increases the degree of compression and acceleration. With rotation, the kinetic energy of the gas increases, and the pressure of the gas passing through the side channels rises further. When the air reaches the junction between the side channel and the discharge flange (where the side channel narrows at the outlet), it is forced out of the blades and discharged from the pump housing through the outlet flange.
Terminology for High-Pressure Centrifugal Blowers
1. Flow Chart
The flow rate of a high-pressure centrifugal blower refers to the volume of gas passing through the fan per unit of time. Units include cubic meters per hour (m³/h), cubic meters per minute (m³/min), and cubic meters per second (m³/s). M³/h is used for domestic high-pressure centrifugal blowers, m³/min for supply fans, and m³/s is widely used in the design and performance calculations of high-pressure centrifugal blowers.
It should be noted that the volumetric flow rate of a blower refers to the volumetric flow rate at the blower’s “inlet.” Since the pressure of the blower varies across different flow sections, the volumetric flow rate through each section also differs.
2. Total Pressure
The total pressure of a high-pressure centrifugal blower is defined as the difference between the total pressure at the outlet and the total pressure at the inlet.
The total pressure at a specific point or section is equal to the sum of the total dynamic pressure and static pressure at that point or section.
Operating Principle of High-Pressure Centrifugal Blowers
When the impeller rotates, centrifugal force causes the gas to move forward and outward, creating a series of spiral movements. The air between the impeller blades rotates in a spiral pattern, and the gas accelerated on the outer side of the pump body is pushed into the side channels (drawn in through the inlet ports). After entering the side channels, the gas is compressed and then returns to the impeller blades to be accelerated again. As the air travels along the spiral path through the impeller and side channels, each impeller blade increases the degree of compression and acceleration. With rotation, the kinetic energy of the gas increases, and the pressure of the gas passing through the side channels rises further. When the air reaches the junction between the side channel and the discharge flange (where the side channel narrows at the outlet), it is forced out of the blades and discharged from the pump housing through the outlet flange.
Terminology for High-Pressure Centrifugal Blowers
1. Flow Chart
The flow rate of a high-pressure centrifugal blower refers to the volume of gas passing through the fan per unit of time. Units include cubic meters per hour (m³/h), cubic meters per minute (m³/min), and cubic meters per second (m³/s). M³/h is used for domestic high-pressure centrifugal blowers, m³/min for supply fans, and m³/s is widely used in the design and performance calculations of high-pressure centrifugal blowers.
It should be noted that the volumetric flow rate of a blower refers to the volumetric flow rate at the blower’s “inlet.” Since the pressure of the blower varies across different flow sections, the volumetric flow rate through each section also differs.
2. Total Pressure
The total pressure of a high-pressure centrifugal blower is defined as the difference between the total pressure at the outlet and the total pressure at the inlet.
The total pressure at a specific point or section is equal to the sum of the total dynamic pressure and static pressure at that point or section.
