The design structure of high-pressure centrifugal blowers is crucial to their efficient performance. The main components include the intake, working wheel (impeller), volute, and guide vanes. Below is a detailed introduction to these core components:

1. Intake
   The intake is the starting point for airflow to enter the high-pressure centrifugal blower. It is typically designed with a backward-curved style. The intake design helps ensure smooth airflow entry and reduces turbulence before the airflow enters the impeller, thus improving the fan’s efficiency.

2. Working Wheel (Impeller)
   The working wheel is the key component of a high-pressure centrifugal blower, responsible for driving the airflow. It consists of several parts:

   • Front Plate (Hyperbolic Shape): The front plate shape helps guide the airflow as it enters the impeller more effectively.
   • Rear Plate: The rear plate helps maintain the stability of the impeller while ensuring smooth airflow passage.
   • Hub: The hub is the central part connecting the blades to the impeller, providing support.
   • Blades: The blades are fixed to the hub and have a rotating function, pushing the airflow along the blades. The airflow speed changes as it passes through the blades, thereby accelerating the airflow.

3. Volute
   The volute is the outer shell of the centrifugal blower, surrounding the impeller. Its purpose is to guide the high-speed airflow produced by the impeller from the circumferential direction to the pressure direction. This process is critical for the efficient pressurization of the high-pressure centrifugal blower.

4. Guide Vanes
   The guide vanes are positioned between the intake and the impeller. Their primary function is to pre-rotate the incoming airflow, aligning the airflow angle with the working angle of the blades. This reduces flow resistance and improves the fan’s performance. The angle of the guide vanes can be adjusted, affecting the fan’s operational characteristics.

5. Blade Exit Angle Structure
   After passing through the blades, the airflow enters the impeller outlet. The reverse angle between the airflow velocity and the circumferential speed is called the blade exit angle (β2). This angle directly impacts the fan’s efficiency and performance. Different exit angles will affect the fan’s airflow, pressure, and efficiency.

6. Single-Suction and Double-Suction Designs
   High-pressure centrifugal blowers can be designed as single-suction or double-suction. In a single-suction blower, the blade width is usually twice that of a double-suction design. This is because the single-suction design requires a larger blade area to meet the same airflow requirements, thus providing higher airflow and pressure.

7. Guide Devices
   Many high-pressure centrifugal blowers are equipped with guide devices between the intake and the impeller. These devices help pre-rotate the incoming airflow to improve the stability of the airflow and the overall efficiency of the fan. While some blowers may not have guide devices, their presence typically optimizes the fan’s performance and adjustment capabilities.

Summary
High-pressure centrifugal blowers achieve airflow acceleration and pressurization through a precise structural design, where the coordinated actions of the impeller, guide vanes, and volute play essential roles. The working principle and component design directly influence the fan’s efficiency and application range. Choosing the appropriate high-pressure centrifugal blower based on specific needs and working environments can significantly improve ventilation, exhaust, and pressurization effects in industrial production.