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V series

Product catalog summary

General Specifications of V Series Gearboxes
Brevini Power transmission S.p.A. V series gear units are three-stage, helical geared hoist drum drive units designed for high precision and durability. They feature a monoblock design for rigid mounting, extended input and output center distances for larger drums, and are capable of handling high radial loads. The gear units are made from GG20 - GG22 cast iron and high-quality case carburized steel, available in five sizes for loads from 0.5 to 50 tons, and compatible with single and double-speed brake motors.

Design Principles
- High technology
- Reliability
- High power density
- High efficiency
- Compatible mounting
- Flexible solutions

Important Notes
- Illustrative drawings are not binding.
- Brevini reserves the right to make changes without notice.
- Follow operating instructions before commissioning.
- Oil quantities are indicative; verify with oil level plugs.
- Warranty void if mounting position is altered.
- Weights are average and may vary with accessories and ratios.

Technical Explanations
Crane Classes
Crane classes depend on total operating hours and load type, ranging from M1 to M8 (ISO 4301-1) and 1Dm to 5m (FEM 9.511/86).

Load Type (Load Collective)
Load collective factor is calculated using provided equations, with loading states categorized as Light, Medium, Heavy, and Very Heavy.

Technical Specifications and Classifications

Crane Classification: Based on working hours and load state, following ISO and FEM standards.
Load State: Categorized as Light, Moderate, Heavy, and Very Heavy.
Load Capacity: Maximum load a crane can handle.
Hook Path: Maximum height a crane can lift or lower a load.
Rope Reeving Arrangement: Expressed with three numbers indicating total falls, rope number, and hook number.
Falls: Ratio between lifting speed and rope velocity at the drum.
Drum Diameter: Calculated using rope diameter and a coefficient from a specified table.

Gearbox Specifications

Output Torque (M2): Calculated by multiplying motor output torque by transmission ratio and efficiency.
Nominal Power (Pe): Power a gearbox can resist under ISO/FEM classification.
Ratio (i): Ratio between output and input shaft speeds.
Permissible Radial Loads (Fqam): Defined at the midpoint of the gearbox's output shaft.
Noise Level: Below VDI 2159 guidelines.
Coating and Corrosion Protection: Painted with RAL 7031, with options for different colors and protective coatings.
Lubrication: Specific oils as per lubrication tables.
Accessories: Include drum connection flange, special sealing solutions, oil level indicator, electromagnetic brakes, thermistor, and manual brake.

Service Factor

Definition: A safety coefficient considering operating conditions, with fs=1 for uniform loads, 8-hour daily operation, and up to 100 starts per hour.
Factors Influencing Service Factor: Operating time, load nature, start-up frequency, driver type, and other considerations.
Selection Process: Determine operation time, load type, and start-up frequency to select the appropriate service factor from a provided table.

Specifications and Procedures:
The document outlines the process for determining the service factor for gearboxes used in cranes and lifting equipment. It emphasizes calculating operating time, load type, frequency of starts, and drive type to establish the correct service factor. The service factor ensures safe operation under specified conditions, with a base factor of 'fs=1' representing uniform load, 8 hours of operation per day, and up to 100 cycles per hour.

Crane Classifications:
Refers to ISO 4301-1 (FEM 9.511/86) standards for crane classification. It explains calculating average daily utilization time using parameters such as hook path, cycles per hour, working hours per day, and lifting speed. Total use time is determined by multiplying average daily utilization time by the number of working days per year and expected service years. There are 10 utilization classes based on total use time.

State of Loading:
Describes different states of loading for cranes, ranging from light (L1) to very heavy (L4), and provides a method to calculate the load spectrum factor.

Service Factor Table:
Includes a table for determining the required service factor for a specific crane class and maximum input motor power.

Key Data from Tables:
- Service factors for different load types and operating conditions.
- Utilization classes based on total duration of use.
- Load spectrum factors for different states of loading.

Recommendations:
Recommends using ISO grouping (FEM) for selecting V series gearboxes and provides a comparison table to determine the appropriate service factor for specific crane classes.

Specifications and Efficiency Calculations:
Outlines efficiency calculations for crane systems, focusing on cable passages and pulley systems. Specifies that efficiency of individual idle pulleys is generally considered zero. Total efficiency of pulleys, excluding idle pulleys, can be calculated using a provided formula.

Gearbox Selection and Calculations:
Provides a detailed procedure for selecting a gearbox for cranes, including calculating required output torque and speed. Emphasizes matching gearbox output speed with calculated speed and ensuring nominal power meets or exceeds required input power. Gearbox efficiency is approximately 0.94.

Radial Load Calculation:
Radial loads for crane systems can be calculated using a specific formula, assuming the crane rope is closest to the gearbox output shaft.

Direction of Rotation:
Defines the direction of rotation for V Series gearboxes, detailing how output shaft rotation corresponds to input shaft rotation.

Gearbox Selection Tutorial:
Provides a step-by-step tutorial for determining crane class and selecting the appropriate gearbox based on performance tables. Includes technical specifications such as load, lifting speed, drum diameter, and expected service life.

Introduction
Provides a detailed guide on selecting gearboxes for cranes, focusing on specific parameters such as load, lifting speed, drum diameter, and crane class. Includes performance tables and formulas for calculating necessary specifications.

Specifications
Outlines specifications for two gearbox models: VR573.1K-132M/4-L10 and VR673.1K-160L/4-L20. Key specifications include:

VR573.1K-132M/4-L10: 7.5 kW motor power, 1400 rpm motor speed, 100 Nm brake, 3742 Nm output torque, 18 rpm output speed, and 83834 N permissible radial load.
VR673.1K-160L/4-L20: 15 kW motor power, 200 Nm brake, 18 rpm output speed, and 61142 N permissible radial load for M8 (5m) crane class.

Procedures
Provides step-by-step procedures for calculating:

Output torque using load, drum diameter, falls, and rope reeving efficiency.
Output speed using lifting speed and drum diameter.
Input power using output torque, output speed, and gearbox efficiency.

Standards and Recommendations
Emphasizes ensuring permissible radial loads exceed occurring radial loads for safety. Provides guidelines for selecting gearboxes based on crane class and operational conditions.

Formulas and Calculations
Several formulas are provided for calculating necessary parameters, including:

Output torque: M = (Load x Drum Diameter x 9.81) / (2000 x Efficiency)
Output speed: n = (Lifting Speed x 1000) / (Drum Diameter x π)
Input power: P = (Output Torque x Output Speed) / (9550 x Efficiency)

General Information
Includes a gearbox selection form to assist in specifying requirements such as crane class, load, drum diameter, lifting speed, motor power, and environmental conditions.

General Characteristics of Three-Phase Motors:
Three-phase asynchronous motors are widely used due to their low maintenance, simple construction, high reliability, and cost-effectiveness. The motor's start-up behavior is characterized by the torque-speed curve, which it follows until reaching a stable operating point where the curve intersects with the load torque line.

Nominal Values and Deviations:
Permissible deviations for nominal values include slip (±20%), start-up current (±20%), start-up torque (-15/+25%), moment of inertia (±10%), and efficiency (up to 37 kW) with a deviation of -0.15 (1-η).

Modes of Operation:
Motors are designed for continuous operation (S1), with other modes such as short-time duty (S2), periodic duty without temperature influence (S3), and others listed in a table.

Protection and Insulation Classes:
Standard motors have an IP54 protection class, with other classes available upon request. The standard insulation class is F, with H class available on request.

Efficiency Classes:
The efficiency measurement method for low voltage three-phase asynchronous motors has been updated to IEC 60034-2-1:2007. Efficiency classes (IE1, IE2, IE3, IE4) are applicable for motors from 0.75 to 375 kW.

AC Frequency Inverters:
An inverter converts DC to AC, using a rectifier to convert AC supply to DC, which is then converted back to variable frequency and voltage AC using an inverter bridge.

Inverter and Frequency Converters
An inverter is an electronic device that converts direct current (DC) into alternating current (AC). It is commonly used in electronic speed controllers for AC motors.

DC Motors
General Specifications: DC drive systems have become more feasible with advancements in electronic components, offering features like guided startup, torque and current monitoring, and overload protection.

Operating Principles: DC motors require a DC output converter and include various windings. They are controlled via carbon brushes and a commutator, necessitating regular maintenance.

Types and Speed Control: DC motors can be categorized based on winding types, affecting torque-speed characteristics.

Electromagnetic Brakes
These brakes have two friction surfaces and operate on the fail-safe principle, where brake torque is generated by springs when no voltage is applied.

Brake Types and Working Voltages
Brakes without Cooling: Suitable for short working cycles.
Fan Cooled Brakes: Used for long working times and in enclosed spaces.
Brakes with Hand Release: Useful in cases of power failure or mechanical issues.

Brake Specifications:
Brakes are provided with a standard supply voltage of 230 V and a half-wave rectifier. For specific applications, contact Brevini Power Transmission S.p.A.

Brake Types and Connections:

Delayed Braking: Used for slow and sliding brake systems.
Immediate/Fast Braking: Used when short braking times are needed.

Shock Voltage Supply Transformer:
Used for high power brakes to quickly generate the electromagnetic field.

Brake Selection Criteria:
To select the correct brake, the following data is necessary: total inertia of rotating parts, maximum motor speed, maximum admitted braking time, required static torque, and safety coefficient (C ≥ 2).

Thermal Capacity:
After calculating the braking torque, the thermal capacity must be checked to ensure it is within the limit curve of dissipable work.

Air-Gap Adjustment:
The brake air-gap must be re-adjusted after a certain period to maintain performance.

Performance Tables:
Includes data on drum diameter, lifting speed, crane class, power, output speeds, output torque, ratio, type, permissible radial loads, weight, and dimensions.

Overview: This document provides detailed specifications and performance data for various crane components, focusing primarily on gearboxes.

Key Sections:

Specifications: Lists specifications for different crane components, including drum diameter, lifting speed, power, output speeds, output torque, and gear ratio.
Procedures: Emphasizes that crane classes are provided only for gearboxes and must be calculated for other crane equipment.
Norms and Standards: Follows ISO (FEM) standards for crane classification.
Recommendations: Users are advised to calculate crane classes for components other than gearboxes.

Data Interpretation: Tables provide a comprehensive view of performance metrics for each component.

Critical Information: Highlights the necessity of calculating crane classes for non-gearbox components.

Overview: Provides detailed specifications and classifications for crane gearboxes.

Key Sections:

Specifications: Lists specifications for different gearbox models.
Crane Classifications: Notes that crane classifications provided apply only to the gearboxes.
Data Tables: Contains extensive tables detailing specifications for various gearbox models.

Critical Information:

Drum Diameter: Ranges from Ø150 to Ø230.
Lifting Speed and Power: Varies significantly across models.
Output Torque and Speeds: Critical for determining efficiency and suitability.
Permissible Radial Loads: Important for ensuring operational safety.

Recommendations: Users should calculate crane classes for components other than gearboxes.

Overview: Provides detailed specifications and classifications for various crane components.

Specifications: Lists multiple crane models with specific parameters.

Crane Classifications: Applicable only to the gearboxes.

Key Parameters: - Drum Diameter: Ranges from Ø270 to Ø440 mm.
- Lifting Speed: Varies across models.
- Power Output: Specified in kilowatts (kW).
- Output Speeds and Torque: Critical for determining mechanical performance.
- Permissible Radial Loads: Defines maximum load the output can handle.

Recommendations: Users should calculate crane classes for components other than gearboxes.

Specifications:
Provides detailed specifications for various lifting equipment components.

Procedures:
Emphasizes that crane classes are specified only for gearboxes.

Standards and Recommendations:
Adhere to specified parameters for optimal performance and safety.

Data Summary:
Contains extensive tabular data detailing specifications of various components.

Critical Information:
Ensure crane class calculations are performed for all components.

Catalog excerpts

Indice Index Inhaltsverzeichnis Info generali General Info. Einfuhrung Significato dei simboli Caratteristiche generali dei riduttori serie V Key of Symbols General Specifications of V Series Gearboxes Erklarung der Bezeichnungen Allgemeine Eigenschaften Von V Serie Getrieben Spiegazioni tecniche Caratteristiche tecniche Accessori Technical Explanations Technical Specifications Accessories Technische Erlauterungen Technische Informationen Zubehor Designazione unita Rapporti possibili, in funzione della grandezza del motore Fattore di servizio Unit Designation Geomet. Possible Combinations of...

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Indice Index Inhaltsverzeichnis d- Controllo della velocita di rotazione dei motori CC d- Speed Control of DC motors d- Drehzahl Kontrolle DC Motoren Freni Brakes Bremsen Freni elettromagnetici Tipi di freni Tipi di connessione Scelta dei freni Capacita termica dei freni Electromagnetic Brakes Brake Types Connection Types Brake Selection Brake Thermal Capacity Elektromagnetische Bremsen Bremsenarten Schaltungsarten Bremswahl Therm. Kapazitat der Bremsen TabeNe prestazionali Perform. Tables Leistung-Drehzahl Tabellen. Tabelle prestazionali dei motoriduttori Geared Motors Performance Tables Getriebenmotoren...

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Informazioni generali General Information EinfuhrungSignificato dei simboli Key of Symbols dispos. dei passaggi del cavo

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Informazioni generali General Information Einführung Note / Notes / Notizen

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Informazioni generali General Information Einführung Note / Notes / Notizen

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Informazioni generali General Information Einführung Caratteristiche generali dei riduttori serie V General Specifications of V Series Gearboxes Allgemeine Eigenschaften von V Serie Getrieben I riduttori serie V di Brevini Power Transmission S.p.A. sono riduttori di tipo elicoidale tristadio, in esecuzione monoblocco, utilizzati per azionare il tamburo di apparecchi di sollevamento. Brevini Power transmission S.p.A. V series gear units are three stage, helical geared hoist drum drive units produced according to the monoblock principle. Brevini Power transmission S.p.A. V Serie Getriebe sind Antriebseinheiten...

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Informazioni generali General Information Einfuhrung Spiegazioni tecniche - Classificazione degli apparecchi di sollevamento I fattori da tenere in considerazione nel determinare il gruppo di cui fa parte l'apparecchio di sollevamento sono: totale ore lavoro prevista di vita e stato di carico. Le classi a cui possono appartenere gli apparecchi vanno dalla M1 alla M8 secondo la norma ISO 4301 / 1 e dalla 1Dm alla 5m secondo la norma FEM 9.1511 / 86. - Stato di carico (Fattore di spettro di carico) Per calcolare lo stato di carico di un apparecchio di sollevamento si possono utilizzare le formule riportate...

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Informazioni generali General Information Einfuhrung - Coppia trasmessa (M2) [Nm] Moltiplicando la coppia in uscita dal motore per il rapporto di trasmissione e il rendimento si ottiene la coppia trasmessa a livello dell'albero in uscita dal riduttore. - Potenza nominale (Pe) [kW] La potenza nominale e la potenza a cui il riduttore, sottoposto a sollecitazioni meccaniche, e in grado di resistere secondo la classificazione ISO / FEM richiesta. I valori della potenza nominale sono indicati nelle tabelle prestazionali. - Rapporto (i) Rapporto tra il numero di giri dell'albero in uscita e quello...

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Informazioni generali General Information Einführung

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Informazioni generali General Information Einführung Designazione unità / Unit Designation / Typenbezeichnungen Freno / Brake / Bremse L-230V Con ventola / With Fan / Mit Lüfter P-24V Con ventola / With Fan / Mit Lüfter S-230 V Senza ventola / Without Fan / Ohne Lüfter Z-24 V Senza ventola / Without Fan / Ohne Lüfter 00- 5 Nm 01- 10 Nm 02- 25 Nm 04- 40 Nm 05- 50 Nm Numero di poli / Number of poles / Anzahl der Polen Grandezza motore /Motor Size / Motorbaugröße 132S / 4 Numero di poli / Pole Number / Anzahl der Polen Lunghezza corpo / Frame Lenght / Gehäuselänge des Motors Grandezza motore / Motor...

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Informazioni generali General Information Einfuhrung Flangia di accoppiamento col tamburo Gli alberi in uscita dei riduttori serie V sono dotati di una linguetta conforme alla norma DIN 5480. Come mostra la figura qui sotto, l'albero in uscita dal riduttore puo essere collegato al tamburo con una flangia di accoppiamento che, su richiesta, puo essere fornita in versione idonea a ricevere la linguetta DIN 5480 di cui e dotato l'albero. Le dimensioni di queste flange sono riportate nelle tabelle dimensionali. Drum Connection Flange V series gearboxes output shafts are equipped with spline according...

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Informazioni generali General Information Einführung I riduttori per apparecchi di sollevamento indistriali possono essere selezionati utilizzando il fattore di servizio o il sistema di classificazione degli apparecchi di sollevamento secondo le norme ISO 4301 / 1 (FEM 9.511 / 86). Per scegliere i riduttori serie V, progettati appositamente per essere utilizzati sugli apparecchi di sollevamento, si raccomanda l'utilizzo delle classificazioni ISO (FEM) illustrate a pagina 13. Il valore del fattore di servizio per una specifica classe di apparecchi di sollevamento è indicato nella tabella comparativa...

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Informazioni generali General Information Einfuhrung Classificazione apparecchi di sollevamento ISO 4301 / 1 ( FEM 9.511 / 86 ) Per determinare la classe di utilizzo di un apparecchio di sollevamento, occorre calcolare il tempo di utilizzo giornaliero medio in ore. Essendo noti la corsa del gancio dell'apparecchio di sollevamento, il numero di cicli per ora, il tempo di lavoro al giorno e la velocita di sollevamento, si puo calcolare il tempo di utilizzo giornaliero medio applicando la formula seguente. Crane Classifications ISO 4301 /1 ( FEM 9.511 / 86 ) For determining the utilization class...

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Informazioni generali General Information Einfuhrung Occorre poi determinare lo stato di carico deM'apparecchio di sollevamento. Il fattore di spettro di carico Km si puo calcolare utilizzando la formula seguente. Secondly we have to determine the state of loading of the crane. We can calculate load spectrum factor Km with below written formula. Zweitens soil Lastkollekiv von Kran bestimmt werden. Wir konnen Lastkollektiffaktor Km mit unterer Gleichung berechnen. t: Tempo di utilizzo medio ai singoli livelli di carico. ti: Average duration of use at the individual load levels. t: Durchschnittliche...

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