Bonfiglioli VF-W series ATEX explosion-proof worm gear reducer

Bonfiglioli VF-W series ATEX explosion-proof worm gear reducer

Bangfeili VF-W series potentially explosive environment (ATEX) worm gear reducer product catalog, in compliance with the EU ATEX 2014/34/EU explosion-proof directive; Covering VF and W series, specifications VF30/44/49, W63/75/86/110; Used in gas and dust explosive hazardous areas, does not support mining Class I equipment.

General Basic Information

1.1 Symbols and Units of Measurement

Define all parameter symbols for selection:

I Transmission ratio=input speed/output speed (M2) rated output torque (M {r2} ) requires actual torque (M2) Calculate torque

(f_s ) utilization coefficient (f_ {tp} ) Temperature correction coefficient (for worm gears, affected by environmental temperature and load impact)

(R_n ) allows radial load (A_n ) Allowable axial thrust load; J moment of inertia ( eta-d ) Dynamic efficiency

The mass acceleration coefficient (K=Jc/Jm) is used to distinguish between K1 uniform load, K2 moderate impact, and K3 strong impact load.

1.2 Introduction to ATEX Explosion proof Directive

Definition of Explosive Environment (2014/34/EU): Combustible gases/vapors/mists/dust mixed with air at atmospheric pressure, and flame spread after ignition. Divided into gas G and dust D.

Hazardous Area Gas G Dust D Environmental Characteristics This product is suitable for

Zone 0 and Zone 20 continue to have explosive environments for a long time ❌ not supported

Occasional occurrences of normal operation in Zone 1 and Zone 21 ✅ Support

Zone 2 and Zone 22 rarely appear and exist for a short period of time ✅ Support

Device Grouping

Group I: Underground Mining (This product is prohibited from use)

Group II: Other explosive gas and dust areas in the factory. This product is suitable for Class 2 and Class 3 equipment and does not support Class 1.

Protection options (ordering suffix)

2G3G-T3: Gas Zone 1/2, Temperature Class T3, Maximum Surface Temperature 200 ℃

2G3G-T4: Gas Zone 1/2, Temperature Class T4, Maximum Surface Temperature 135 ℃

2D3D-130: Dust Zone 21/22, Maximum Surface Temperature of the Shell 130 ℃

2D3D-160: Dust Zone 21/22, Maximum Surface Temperature of the Shell 160 ℃

Declaration of conformity: PDF version of the installation and use manual can be downloaded from the official website; Not following the manual will invalidate the explosion-proof certificate.

1.3 Use, Installation, and Maintenance

The user manual must be stored on the equipment site for operators to refer to; The manufacturer has the right to update the manual.

1.4 Gearbox selection process

Preconditions for selection

Obtain the usage factor fs based on load impact (K1/K2/K3), hourly startup frequency Zr, and daily operating hours by referring to the chart.

The efficiency of worm gear decreases significantly with the increase of transmission ratio, and the efficiency is low at high speed ratios.

There are two selection paths: with IEC motor flange interface and solid input shaft version.

① IEC motor flange type selection

Determine the usage factor fs

Rated input power: (P_ {n1} ge P_ {r1} × f_s )

Motor power (P_1 ge P_ {r1} )

Verify safety factor: (S=P_ {n1}/P_1 ge f_s )

② Solid input shaft selection

Calculate the torque: (M2=M2 × Fs × FtP), (FtP) is affected by environmental temperature and impact load, with a maximum worm gear coefficient of 1.17 at 40 ℃

Select gearbox: Rated output torque (M2} ge M2} )

Select verification items after selection

Instantaneous peak torque: allows approximately 200% of rated torque; Excessive configuration of torque limiter.

Radial load: Actual radial load ≤ sample allowable radial load Rn.

Axial thrust load An:

When radial loads are present simultaneously: (An=0.2 × Rn ); When there is no radial load, the allowable thrust load is 0.5 × Rn. If the thrust is too large, please contact the manufacturer.

Mandatory operating conditions for ATEX explosion-proof models

Environmental temperature: -20 ℃~+40 ℃

It must be installed according to the installation method specified on the nameplate; The installation of the tilt axis requires written permission from the manufacturer.

The maximum speed of the supporting motor shall not exceed 1500r/min; When driving the motor with a frequency converter, it is strictly prohibited to exceed the speed or overload.

Product details of explosion-proof worm gear reducer

2.1 Structural characteristics of ATEX explosion-proof version

Equipped with oil level maintenance plug; Add synthetic lubricating oil according to the ordered installation position at the factory;

W110 is installed in the V5/V6 mounting position, and the B14 motor flange version is not filled with oil at the factory, but is filled on site.

Standard configuration fluororubber sealing ring; No plastic parts; Reserved tapping holes on the side of the shell for expansion installation; The nameplate indicates the explosion-proof category and protection level.

Lubricating oil model: SHELL OMALA S4 WE 320 synthetic oil.

2.2 Product version and installation location

VF series: models VF30, VF44, VF49; Version A/N/V/P/F/FA/U; Supports 6 standard installation postures, including B3/B6/B7/B8/V5/V6.

W series: models W63, W75, W86, W110; Version U, UF, UFC, UFCR; B3/B6/B7/B8/V5/V6。

2.3 Ordering Code Rules

Example: W 75 U D30 60 HS-B3 2D3D-130

Series (W/VF) → Machine size → Output version → Output aperture → Transmission ratio → Input configuration (HS solid shaft/IEC flange P56-P132) → Installation position → Explosion proof option suffix.

2.4 Lubrication

The vast majority of models come pre charged with Shell OMALA S4 WE320 at the factory; Sealed oil plugs for transportation must be replaced with vent oil plugs on site.

W110 special working conditions do not require pre oil injection and require on-site refueling; The sample provides the corresponding fuel volume (liters) for each machine base and installation position.

2.5 Cantilever Load (Radial&Axial)

Radial load calculation formula: (R_ {c1}= frac {2000 cdot M1 cdot Kr} {d} quad R_ {c2}= frac {2000 cdot M2 cdot Kr} {d} ) Kr transmission coefficient 1-2 (R_c le R_n)； The position of the load deviates from the axis reference position and requires a position correction factor.

Axial thrust load: associated with radial load, exceeding the limit, contact Bonfly Technology.

2.6 Rated Parameters Table of Reducer

The sample provides a complete data table for each model under input conditions of n ₁=1400rpm: output speed n ₂, static efficiency η s, dynamic efficiency η d, rated output torque Mn2, rated input power Pn1, allowable radial load Rn1/Rn2 for input and output; At the same time, label the corresponding explosion-proof options that can be selected.

Power and torque range: VF30 (11Nm) to W110 (670Nm).

2.7 Motor adaptation

IEC flange adaptation B5 (large flange), B14 (small flange); P56-P132 motor base. The table lists the motor base numbers that each reducer is allowed to adapt to.

Non standard motor adaptation: HS solid input shaft version can be selected, with custom input shaft aperture and flange size; To verify the mechanical strength, the safety factor S should be ≥ 0.9.

2.8 Rotational inertia

All models have a moment of inertia Jr (converted to high-speed input shaft, unit: kg · m ² × 10 ⁻⁴); Distinguish between different IEC flange specifications and HS solid input shaft versions. Used for initiating, dynamic, and inertial matching calculations.

2.9 Overall dimensions

Complete 2D engineering drawings: VF30/44/49; W63/W75/W86/W110。 Includes various versions A/N/V/P/F/FA/U/UF/UFC; Input flange B5/B14 size, output hollow shaft aperture, keyway size, foot, and flange installation all dimensional parameter table.

2.10 Attachment

Plug in solid output shaft: optional external output shaft; Provide a full range of dimensions, including shaft diameter, key, and length parameters.

VF interchangeable foot kit KA, KV.

2.11 User made output shaft

Provide material (high-quality alloy steel), fitting size, keyway, and thrust positioning design suggestions for user matching shafts.