How much does a Roots blower weigh? Engineering password behind weight parameters**
**Key words: equipment weight and structural design**
**1、 Decomposition of weight composition**
|Components | Proportion | Materials | Weight Reduction Plan|
|------------|------|----------------|-------------------|
|Shell | 45 | HT250 cast iron | Use QT450 ductile iron instead|
|Impeller | 25 | 45 steel | Nickel plated aluminum alloy|
|Base | 15 | Q235 steel | Hollow design|
**Actual measurement data * *:
-Traditional 1.5kw fan: 85kg → Lightweight model: 58kg (reduced weight by 32)
**2、 Weight affects three major dimensions**
1. * * Installation cost * *:
-Equipment weighing over 100kg needs to be lifted (additional cost of 500-1000 yuan per unit)
2. * * Vibration Control * *:
-For every 10kg reduction, the vibration value increases by 0.5mm/s (requiring re weighting)
3. * * Transportation Specifications * *:
-Over 80kg requires wooden crate (shipping cost+30)
**3、 Selection suggestions**
-Roof installation: Choose lightweight models (such as JAS-15)
-Mining Mobile Equipment: Choose Heavy Duty Base Model (Anti Vibration)
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**4. What is the pressure of the Roots blower? Breakthrough from principle to limit**
**Key words: pressure limit and technological innovation**
**1、 Pressure limit experiment data**
|Technical route | Pressure (kPa) | Temperature control scheme | Representative manufacturer|
|----------------|---------------|-------------------|-------------------|
|Conventional Three Leaf Type | 98 | Natural Air Cooled |/|
|Double stage series | 196 | intercooler | Houghton|
|Special alloy impeller | 245 | Water cooling jacket | Japan Daiko|
**2、 Key points of design for ultra-high voltage system**
1. * * Gap Control * *:
-For every 49kPa increase in pressure, the impeller clearance needs to be reduced by 0.02mm
-The precision requirement for laser alignment instrument is less than 0.01mm
2. Sealing upgrade:
|Pressure (kPa) | Sealing type | Leakage rate (m3/h)|
|-----------|-------------------|--------------|
|<49 | Rubber seal |<0.5|
|98-196 | Maze seal+nitrogen blocking seal | ＜ 0.05|
**3、 Industry breakthrough cases**
-Lithium battery material transportation:
-Original plan: Two stage fan (total power 55kw)
-Current plan: Single high-pressure type (29.4kPa → 147kPa, energy-saving 37)
