DE102009015208B3 - Drive for oscillating conveying trough, has fastening element, two centering pins, permanent magnet, coil and soft iron hollow core, where permanent magnet is provided elastically with centering pins suspended in coil - Google Patents

Abstract

The drive has a fastening element (2), two centering pins, a permanent magnet, a coil (7) and a soft iron hollow core (8). The permanent magnet is provided elastically with the centering pins suspended in the coil. A soft iron core is the soft iron hollow core, and the coil is fastened in the soft iron hollow core that is formed in pipe-shaped.

Description

in the subsequent will be for the design described uses the abbreviation "Permag".

The The invention relates to a teaching according to the preamble of the claim 1.

Such a drive is from the DE 20 2008 006 747 U1 known.

Further Electrodynamic drives are used in loudspeakers.

The AT 252802 B indicates an electromagnetic drive with centrally suspended free mass.

The The invention relates to a vibratory conveyor for all Types of eligible Bulk materials. Main use the embodiment shown is the sensitive one Dosing of bulk materials in further Processes such as B. weighing equipment.

Physical principle of Schwing promotion

• – Schwingwinkel (hier: 30°)
• – Schwingfrequenz (hier: 25–75 Hz, typ. 50 Hz)
• – Schwingweite (hier: Abhängig von der Betriebsspannung; ca. 0,7–1,5 mm)

The main influencing parameters on the conveying speed are:

• - swing angle (here: 30 °)
• - Oscillation frequency (here: 25-75 Hz, typ. 50 Hz)
• - amplitude (here: depending on the operating voltage, about 0.7-1.5 mm)

By which extends at an angle of 30 ° Oscillation of the conveyor trough becomes the bulk material in it through a multitude of constantly repeating microphobic movements moved towards the trough outlet.

The achievable conveying speeds are about 3 to 15 cm / s.

Technical status existing types

The currently available on the market vibratory Feeders with magnetic drive contain an electromagnet with E-core, the only an attractive electromagnetic force on an I-core laminated core which exercises at a small distance with a defined axial air gap is mounted. This arrangement is achieved by means of a thyristor phase control operated with pulsating direct current. Depending on the phase angle This allows the system's amplitude to be regulated.

These Design generates weak driving forces at high energy and Cost of materials. At all to achieve acceptable vibration ranges, the system is as resonanznah tuned mass-spring-mass system formed. The operating frequency is about 5% below the system's own resonance frequency.

When changing The system mass (eg due to caking in the conveyor trough) reduces the resonance frequency of the system Systems and moves closer in Direction operating frequency, which results in high vibration frequencies; then the E core can hit the I core in a short time to damage of the system leads.

Properties of the PERMAG vibrating conveyor trough

• – Betrieb mit normalem Wechselstrom an Niederspannung.
• – Hohe Antriebskräfte bei geringem elektr. Energieaufwand.
• – Hoher Wirkungsgrad.
• – Schwingweite ist spannungsabhängig.
• – Keine Phasenanschnittsteuerung notwendig.
• – Verursacht keine Netzstörungen.
• – Kein Resonanzzsystem, daher kein Abstimmaufwand.
• – Bei längeren oder breiteren Rinnen können mehrere Antriebssysteme am selben Maschinenkörper angebracht werden; die erregbare Last steigt proportional mit der Zahl der Antriebe. Die Antriebe laufen ohne weitere besondere Maßnahmen phasengleich.
• – Das System kann mit variabler Frequenz betrieben werden.
• – Kein Axialspalt, daher kein Anschlagbetrieb möglich.
• – Unempfindlich gegenüber Änderung der Nutzmasse.
• – Sehr geringer Materialaufwand; extrem kostengünstig.
• – Kann kurzfristig stark überlastet werden. (Kein Axialspalt → Kein Anschlagbetrieb)

The PERMAG vibrating conveyor trough has the following properties:

• - Operation with normal alternating current at low voltage.
• - High driving forces with low electr. Energy expenditure.
• - High efficiency.
• - Vibration amplitude is voltage dependent.
• - No phase control required.
• - Does not cause power disturbances.
• - No resonance system, therefore no tuning effort.
• - For longer or wider gutters, several drive systems can be mounted on the same machine body; the excitable load increases proportionally with the number of drives. The drives run in phase without any special measures.
• - The system can be operated with variable frequency.
• - No axial gap, therefore no stop operation possible.
• - Insensitive to change in the payload.
• - Very low material costs; extremely inexpensive.
• - Can be heavily overloaded in the short term. (No axial gap → no stop operation)

critical for the Function is that a permanent magnet with an alternating magnetic field alternating in attractive and repulsive interaction.

The Functioning of the PERMAG vibrating conveyor drive is based on an embodiment described.

1 ( 1 - 10 ); 2 ( 11 - 14 )

A permanent magnet with double-sided pole plate ( 5 ) sits centrically - and by means of two Epoxy centering spiders ( 3 . 9 ) suspended elastically - in a low-resistance coil ( 7 ). The sink ( 7 ) is in a tubular soft iron hollow core ( 8th ) attached. The length of the soft iron hollow core ( 8th ) is slightly larger than the pole plate spacing of the permanent magnet ( 5 ).

Now the coil ( 7 ), this has the consequence that in the soft iron hollow core ( 8th ) creates an axially oriented alternating magnetic field. This alternating magnetic field interacts with the constant magnetic field. Alternately, a strongly repulsive or strongly attractive force is generated in the axial direction. The double-sided epoxy centering spiders ( 3 . 9 ) have the task, the annular gap between permanent magnet ( 5 ) and coil ( 7 ) to keep constant; act as a guide. (They have no resonance function.)

The soft iron hollow core ( 8th ) is by means of a flange ( 2 ) with the machine body (= conveyor trough) ( 11 ) firmly connected. The permanent magnet ( 5 ) is about the two spiders ( 3 . 9 ) axially elastic from the machine body ( 11 ) decoupled. Occurs between permanent magnet ( 5 ) and soft iron hollow core ( 8th ) of the coil ( 7 ) now an axially repulsive interaction, so moves the machine body ( 11 ) away from the magnet ( 5 ); repulses himself from him; in poling change, the opposite happens because now sets attractive interaction. The amplitude ratios are as follows: Swing width trough swTrog Oscillation amplitude magnet swMag Mass trough mTrog Earth magnet MMag swMag / swTrog = mTrog / mMag

1

central screw

2

mounting flange for assembly on the machine body

3

spider A

4

spacer

5

permanent magnet with two pole plates

6

spacer

7

Kitchen sink, glued into soft-iron hollow core from the inside

8th

Soft iron hollow core

9

spider B

10

disc and mother

11

machine body

12

shift spring

13

support structure

14

PERMAG drive unit

Claims (1)

Drive for a vibrating conveyor trough, which has a fastening element ( 2 ), two spiders ( 3 . 9 ), a permanent magnet ( 5 ), a coil ( 7 ) and a soft iron hollow core ( 8th ), wherein the perma magnet ( 5 ) elastically with the spiders ( 3 . 9 ) suspended in the coil ( 7 ) and wherein the coil is subjected to alternating current, characterized in that - the soft iron core is a soft iron hollow core ( 8th ) - that the coil ( 7 ) in the tubular soft iron hollow core ( 8th ) and - that the permanent magnet ( 5 ) and thereon arranged pole plates centrally with the aid of bilaterally arranged centering spiders ( 3 . 9 ) in the coil ( 7 ) are suspended.