What Are the Main Components and Functions of the 2RB Vortex Blower?

The 2RB vortex blower, as a widely used universal air source equipment in the industrial field, is designed based on regenerative theory. It achieves efficient airflow compression through the synergistic effect of annular flow channels and multi-blade impellers. The key components are analyzed below from three dimensions: structure, function, and technical advantages.

I. Core Power Components: Impeller and Motor

1. Multi-Blade Impeller
The die-cast aluminum alloy impeller is equipped with 50-60 radial blades, forming a precise gap of 0.18-0.75 mm between the blade edges and the housing. When the impeller rotates at high speed (2800-3450 rpm), the gas accelerates along a spiral trajectory under centrifugal force, achieving single-stage pressure increase through repeated compression in the impeller-housing gap. For example, the 2RB920-7HH47 model can generate an exhaust pressure of 59 kPa and an airflow rate of 1110 m³/h, with pressure efficiency 12-17 times higher than traditional centrifugal blowers.

2. Variable Frequency Wide Voltage Motor
The motor is configured as an IEC-standard fully enclosed external fan-type aluminum frame motor, supporting a wide voltage input range of 110V-660V and variable frequency adjustment of 20-80 Hz. The motor adopts Class F insulation and IP55 protection rating, enabling stable operation in environments ranging from -25°C to 180°C. Some models, such as the 2RB810-7AH27, are equipped with Siemens-technology motors, with a lifespan of 3-5 years, 40% longer than domestic motors.

II. Fluid Control Components: Housing and Flow Channel

1. Annular Compression Housing
The ADC12 die-cast aluminum alloy housing features an inner wall smoothness of Ra 0.8 μm. Combined with the precision-machined annular flow channel design, it enables the formation of controlled vortices at the outer edge of the impeller. The upper part of the housing integrates radial suction and exhaust ports, with a partition plate isolating the suction and exhaust paths to prevent gas short-circuiting. For example, the flow channel cross-sectional area change rate of the 2RB720-7HH47 model is optimized through CFD, reducing pressure loss by 18%.

2. Two-Stage Compression Structure
Dual-impeller models (e.g., 2RB920-7HH37) adopt a series flow channel design. After initial compression by the first-stage impeller, the gas enters the second stage through an intermediate diversion chamber for further pressurization. This design enables an 11 kW model to generate a compression pressure of 60 kPa, with 25% higher efficiency than single-stage models, making it suitable for high-pressure applications such as wastewater aeration.

III. Auxiliary Functional Components: Transmission and Protection

1. Maintenance-Free Bearing System
The main shaft uses SKF/NSK double-row tapered roller bearings, with a load capacity of up to 350°C high temperature and 4000 rpm speed. The bearing preload is precisely controlled using specialized tooling to ensure a constant gap between the impeller and housing. For example, the bearing lifespan of the 2RB210-7AA11 model reaches 50,000 hours, three times longer than traditional blowers.

2. Multiple Protection Devices

1. Pressure Relief Valve: Automatically opens when the pressure exceeds the set value to prevent overpressure damage. For example, in organic fertilizer fermentation aeration systems, the pressure relief valve stabilizes the pressure within the safe range of -44 kPa to 57 kPa.

2. Dust Filter: Uses HEPA filter elements with a filtration efficiency of 99.97% for 0.3 μm particles, suitable for clean scenarios such as food processing.

3. Silencing Device: Equipped with impedance composite silencers at the inlet and outlet, achieving a noise reduction effect of 10 dB(A). When used with sound-absorbing cotton, the noise can be reduced to below 70 dB(A).

IV. Structural Optimization Components: Installation and Connection

1. Elastic Vibration Damping System
High-power models (≥7.5 kW) are standardly equipped with rubber buffer pads, reducing vibration transmission by 80%. For example, when connecting to a 4-inch diameter pipeline, the 2RB820-7HH27 uses stainless steel corrugated hoses to isolate vibrations and avoid pipeline stress damage.

2. Modular Design
The housing adopts a longitudinally split structure, enabling quick disassembly and assembly through 12 sets of M10 bolts. The impeller and main shaft are connected via involute splines, achieving a torque transmission efficiency of 98%, 15% higher than flat key connections. This design reduces maintenance time from 4 hours for traditional blowers to 0.5 hours.

Summary of Technical Advantages

The 2RB vortex blower achieves performance breakthroughs through the following innovations:

·Single-Stage High Pressure: Spiral compression technology achieves a pressure range of 11.76-59 kPa, covering 80% of industrial application requirements.

·Oil-Free Purity: Fully enclosed structure avoids lubricating oil contamination, with gas oil content <0.01 mg/m³.

·Intelligent Adaptation: Supports 0-100% airflow adjustment, enabling energy-saving operation with frequency converters.

·Long Life and Reliability: Core component lifespan exceeds 50,000 hours, with MTBF reaching 80,000 hours.

This series of blowers is widely used in environmental water treatment, textile machinery, food packaging, and other fields. Its modular design and intelligent control features are driving industrial pneumatic systems toward higher efficiency and cleanliness.

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