The Flexible Connector of Roots blower is a flexible component installed between the inlet and outlet of the blower and the pipeline, mainly used for shock absorption, noise reduction, displacement compensation, and to prevent vibration transmission to the pipeline system. The following is a detailed explanation about the soft connection of Roots blower:
---
**1. The role of soft connections**
-Shock absorption and noise reduction: Absorb the vibration and noise generated during the operation of the fan to avoid transmission to pipelines or equipment.
-Compensate for displacement: Adapt to axial, radial, and angular displacement between the fan and the pipeline (such as thermal expansion, contraction, or installation deviation).
-* * Protect equipment * *: Reduce damage to fans and pipelines caused by vibration or pipeline stress.
-Sealing and Leak Prevention: To prevent gas leakage and ensure the airtightness of the system.
---
**2. Common types of soft connections**
**(1) Rubber soft connection**
-Material: Oil resistant, corrosion-resistant rubber (such as NBR, EPDM) or fluororubber (FKM).
-* * Structure * *: Internal reinforced curtain layer, external rubber wrapping, flange or clamp connection.
-* * Features * *:
-Good elasticity and significant shock absorption effect.
-Suitable for working conditions with temperature ≤ 80 ℃ and pressure ≤ 0.6MPa.
-Not resistant to high temperatures and organic solvents (materials need to be selected according to the medium).
**(2) Stainless steel corrugated soft connection**
-Material: 304/316 stainless steel corrugated pipe, outer layer can be covered with fireproof cloth or rubber layer.
-* * Features * *:
-High temperature resistance (up to 500 ℃), corrosion resistance, suitable for chemical and high-temperature waste gas treatment.
-Strong pressure bearing capacity (usually ≤ 1.6MPa).
-It can compensate for larger displacements, but its shock absorption effect is weaker than rubber.
**(3) Canvas soft connection**
-Material: Fireproof canvas (coated with silicone or fluoroplastic), polyester fiber cloth.
-* * Features * *:
-Lightweight, low-cost, suitable for low-pressure, room temperature (≤ 100 ℃) air transportation.
-Commonly used for dust removal systems or temporary pipeline connections.
---
**3. Key selection points**
|* * Parameters * * | * * Considerations * *|
|------------------|----------------------------------------------------------------------------|
|* * Medium * * | Gas composition (whether it contains oil, corrosiveness), temperature, humidity (if it is in a humid environment, mold prevention is required). |
|Pressure * * | Working pressure and pulse pressure (Roots blower has pulsating airflow, and fatigue resistant materials need to be selected). |
|* * Displacement * * | Axial/radial compensation requirements (such as thermal expansion or installation errors). |
|* * Flange Standard * * | Matching flange specifications for fans and pipelines (such as GB, ANSI, DIN). |
|Explosion proof requirements * * | Chemical, coal mining and other scenarios require the use of anti-static or flame-retardant materials (such as conductive rubber). |
---
**4. Installation precautions**
1. * * Neutral check * *: After installing the soft connection, do not forcefully stretch or compress it to avoid twisting.
2. * * Bolt Tightening * *: When connecting flanges, bolts should be tightened diagonally and evenly to prevent local stress.
3. * * Direction Identification * *: Some rubber soft connections have fluid direction arrows and need to be installed according to the identification.
4. * * Maintenance and replacement * *: Regularly check for aging, cracks, or deformation (rubber parts typically have a lifespan of 3-5 years).
---
**5. Common problems and solutions**
-Problem 1: Soft connection rupture or air leakage.
**Reason * *: Overpressure, material not resistant to medium corrosion, or excessive installation stress.
**Solution: Replace with a higher pressure rating or corrosion-resistant material (such as stainless steel bellows).
-Problem 2: Vibration is transmitted to the pipeline.
**Reason * *: Soft connection stiffness mismatch or aging failure.
**Solution: Choose rubber soft connections with better elasticity or add shock absorbers.
---
**6. Related standards**
-GB/T 26121-2010: Flexible Rubber Joints
-EJMA (American Expansion Joint Manufacturers Association Standard): Suitable for metal bellows design.
-HG/T 2289-2001: "Flexible Rubber Joints" Chemical Industry Standard.
---
**Summary**
-* * General working conditions * *: Priority should be given to rubber soft connections (economical and with good shock absorption effect).
-High temperature/corrosion: Choose stainless steel corrugated pipe or fluororubber material.
-Low pressure ventilation: Canvas soft connection can meet the needs.
Suggest consulting with suppliers based on actual working conditions to ensure that the material, pressure rating, and compensation capability match the system requirements.
