**Detailed structural analysis of imported muffler for Roots blower**
**1. Core structure composition**
```mermaid
graph TD
A [Imported Silencer] -->B [Shell System]
A -->C [Silencing module]
A -->D [filtration system]
A -->E [Connecting components]
B -->B1 [Cylinder]
B -->B2 [End cap]
B -->B3 [Reinforcement]
C -->C1 [Sound absorbing layer]
C -->C2 [resonant cavity]
C -->C3 [Airflow Channel]
D -->D1 [coarse filter]
D -->D2 [Fine Filter]
D -->D3 [Dust Box]
E -->E1 [flange]
E -->E2 [Sealing gasket]
E -->E3 [Quick release mechanism]
```
**2. Detailed explanation of layered structure**
**(1) Shell system**
-* * Cylinder * *:
-Material: Q235B carbon steel (2.5-3mm)/304 stainless steel (2mm)
-Process: Plate welding (full coverage of weld seam by argon arc welding)
-Anti corrosion: Spray treatment (thickness 80-120 μ m)
-End cap:
-Stamping forming (R angle ≥ 3 times plate thickness)
-Equipped with inspection window (tempered glass, pressure resistant to 0.1MPa)
**(2) Silencing module**
|Structural type | Technical parameters | Noise reduction mechanism|
|------------|-----------------------------|------------------------|
|Resistive sound-absorbing layer | Ultra fine glass wool (48kg/m3) | Porous material for converting sound energy into heat energy|
|Resistance cavity | Helmholtz resonator (Φ 80-120mm) | Specific frequency acoustic wave cancellation|
|Maze channel | Baffle spacing 50-80mm | Extend sound wave propagation path|
**(3) Filtering system**
-* * Three level filtration design * *:
1. Coarse filter: 20 mesh stainless steel mesh (intercepting particles ≥ 1mm)
2. Fine filter: 120 mesh sintered metal (intercepting particles ≥ 125 μ m)
3. Cyclone Separation: Tangential Inlet Design (Separating Droplets)
**3. Key component parameters**
**Technical specifications for airflow channels * *:
-Honeycomb channel: regular hexagon, side length 15-20mm
-Surface treatment: electrolytic polishing (Ra ≤ 0.8 μ m)
-Flow rate control: 6-12m/s (noise reduction range)
**Performance of sound-absorbing material * *:
-Centrifugal glass wool:
-Fiber diameter: 5-7 μ m
-Hydrophobic rate: ≥ ninety-eight
-Temperature resistance: conventional type 120 ℃, high temperature type 300 ℃
**4. Dynamic airflow organization**
```mermaid
flowchart LR
Air inlet -->coarse filter -->cyclone separation -->expansion chamber -->sound absorption maze -->fine filter -->air outlet
```
**Airflow characteristics * *:
-Reynolds number: 8000-15000 (turbulent state)
-Static pressure recovery coefficient: 0.65-0.78
-Turbulence intensity: ≤ 8 (optimized)
**5. Special structural design**
**Anti oil mist structure * *:
-Guide vanes: 30 ° tilt angle (oil droplet collision recovery)
-Oil collection tank: with magnetic oil discharge valve at the bottom
**Anti condensation design * *:
-Electric heating belt: power 15W/m (maintaining wall temperature>dew point 5 ℃)
-Insulation layer: rock wool+aluminum foil (thickness 50mm)
**6. Comparison of Material Selection**
|Components | Ordinary Type | Corrosion Resistant Type | Food Grade|
|------------|---------------------|---------------------|---------------------|
|Shell | Q235B+epoxy powder | 316L stainless steel | 304+PTFE lining|
|Filter | 304 stainless steel weaving | Hastelloy sintering | Titanium wire sintering|
|Seals | Nitrile rubber | Fluororubber | Silicone rubber|
**7. Manufacturing process requirements**
-* * Laser cutting * *: Hole plate tolerance ± 0.1mm
-Welding process:
-Shell: Double sided submerged arc welding (X-ray inspection)
-Internal components: Pulse argon arc welding (deformation<0.5mm)
-* * Dynamic balance test * *: Overall residual unbalance ≤ 1.5g · mm
**8. Performance validation standards**
-Acoustic testing:
-Insertion loss: executed according to GB/T 4760
-Airflow regeneration noise: ≤ 80dB(A)@10m/s
-* * Mechanical testing * *:
-Pressure resistance test: hold at 1.5 times the working pressure for 30 minutes
-Vibration test: 4.5mm/s @ 50Hz without looseness
**9. Typical Failure Modes**
```mermaid
pie
Title Fault Distribution
The sound-absorbing material falls off: thirty-five
Filter blockage: forty-five
Weld cracking: twelve
Sealing failure: eight
```
**10. Innovative Structure Case**
**Self cleaning muffler * *:
-Integrated pulse blowback system (0.6MPa compressed air)
-Intelligent differential pressure control (automatically triggered cleaning)
**Modular muffler * *:
-Segmented design (1m per section, quick combination)
-Plug in seal (fluororubber O-ring)
It is recommended to choose models with access doors (size ≥ 300 × 300mm) for easy replacement of sound-absorbing materials. For working conditions with a dust content greater than 50mg/m3, vertical installation should be preferred and an automatic ash discharge valve should be installed.
