Magnet rings heavy duty applications
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MAGNET RINGS HEAVY DUTY APPLICATIONS

CONTENTS INTRODUCTION ����������������������������������������������������4 1 – HUTCHINSON GROUP �����������������������������������������������������������������4 2 – HUTCHINSON PRECISION SEALING SYSTEMS ���������������������5 OUR MAGNET RINGS ��������������������������������������������6 1 – DESCRIPTION �������������������������������������������������������������������������������6 2 – MATERIAL ��������������������������������������������������������������������������������������7 2�1 – Surface treatment & adhesion ���������������������������������������

INTRODUCTION 1 – HUTCHINSON GROUP 4 To meet the needs of its global customers on land, in the air and at sea, Hutchinson has been designing, developing and manufacturing high-performance solutions for over 160 years� Our innovations cover a wide variety of demanding markets: automotive, aerospace, defence, energy, rail and industry in general� Hutchinson is a global leader in anti-vibration systems, fluid management and sealing solutions, our group stands out for its multi-market and multi-expertise approach, a source of synergies and added value� PRECISION SEALING SYSTEMS BODY SEALING...

2 – HUTCHINSON PRECISION SEALING SYSTEMS Hutchinson Precision Sealing Systems designs and manufactures sealing solutions for dynamic applications and magnetic encoders measuring movement and position of rotating shafts and moving objects� Our project team relies on constant experimentation and innovation, to develop solutions that are perfectly adapted to customer needs� Our business unit has an international footprint with production and sales sites in Europe, NAFTA (Mexico and USA), Brazil and across Asia in China and Japan� Worldwide production Continuous R&D product development...

OUR MAGNET RINGS 1 – DESCRIPTION Our magnet rings are made of a metal insert bonded to a magnetic rubber compound� It responds efficiently to industrial applications, combining elastic properties and strong rubber/insert adhesion needed in extreme environments� Metal Insert Multi-track Magnet Ring The magnet rings are compatible with different sensor technologies such as Hall Effect and magneto-resistive� Our solutions allow high measurement accuracy� They are integrated in position and speed control systems such as encoders, motors, and actuators� We develop and manufacture magnet rings...

2 – MATERIAL 2.1 – Surface treatment & adhesion Bonding technology by Hutchinson vs gluing Thanks to a special expertise in rubber adhesion, we can design the metal and the bonding agent system according to customer needs� 2.2 – Rubber We design our magnetic rubber compounds with an expertise of more than 160 years� Our elastomer technology provides a good resistance to mechanical stress due to its elastic properties� Our HNBR compounds offer solutions for high temperature� They are based on anisotropic magnetic ferrite technology to get the best magnetic and mechanical performance� Their...

Sensor housing Sensing element Magnet Ring Reading diameter Reading aera The sensing element is located in the Reading Area� Ri/Re: Reading Radius min/max Ag1/Ag2 : Air Gap min/max Magnet Ring Magnetic profile The outline of the magnetic profile is important as it allows us to define the recommended reading area in order to improve the magnetic performance� Magnetic Amplitude The distance between the surface of the magnet ring and the sensing element within the sensor housing is refered as the magnetic air gap� Reading position

Temperature effect The operating temperature affects the magnet� For each degree Celsius increase, the ferrite remanence decreases by 0�19%� This effect is reversible as it returns to ambient temperature� Signal strength The magnetic signal is stronger when the air gap is smaller� Pole width The pole width affects the magnetic flux amplitude� It is important to know the air gap to calculate the recommended reading area and get the desired magnetic strength� Magnetic Amplitude

PARTS SELECTION 1-TECHNICAL SUPPORT All our parts can be pre-designed with a magnetic simulation� We offer on request numerical simulations that support accurately your designs and test their performance� Feasibility studies or mockup parts can be realized upon request to fit customer needs. Our experts can advice you about the reading position to fit the magnetic profile of your part. A parametric study takes every parameter into account to possibly optimize the part including the rubber volume� Thickness Height Other factors that the numerical simulation covers is the magnetic compound,...

The axis is always consider to be at the left of the profile� Height We design several profiles to fit different applications� 2.2 – Axial or Radial Axial The magnetic field (B) is along the rotational axis� The magnetic field (B) is orthogonal to the rotational axis�

3.1 – Axial references Profile

3.2 – Radial references Profile PARTS SELECTION

11/2021 - Ph. : HUTCHINSON, Adobe Stock Hutchinson - Paulstra SNC Z.I. d‘Etriché, Route d‘Aviré 49500 Segré-en-Anjou-Bleu - France www.hutchinson.com / paultsra.seal@hutchinson.com +33 2 41 94 5