Reasons for the axial movement of the crusher rotor

MJ Series Jaw Crusher

MJ Series Jaw Crusher

MJ series jaw crusher is mainly used as a coarse crushing crusher. Its purpose is to crush rocks into smaller particle sizes for subsequent processing…

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MC Series Single-Cylinder Hydraulic Cone Crusher

MC Series Single-Cylinder Hydraulic Cone Crusher

MC series single cylinder hydraulic cone crusher is used in secondary and fine crushing operations. It is widely used in metallurgy, construction, highway,…

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ML Series Vertical Shaft Impact Crusher

ML Series Vertical Shaft Impact Crusher

Vertical shaft impact crusher is often used in the final crushing circuit. Due to the ability to produce fine-grained final products, ML series vertical…

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MD Series Multi-Cylinder Hydraulic Cone Crusher

MD Series Multi-Cylinder Hydraulic Cone Crusher

MD series multi-cylinder hydraulic cone crusher is used in the second and third stages of mineral processing and stone crushing, as well as the superfine…

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MF Series Fixed Shaft Circular Vibrating Screen

MF Series Fixed Shaft Circular Vibrating Screen

In order to eliminate the phenomenon of unbalanced vibration, unstable amplitude, on/off bounce, poor screening effect, and cracking of the screen box…

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MGD Series Vibrating Feeder

MGD Series Vibrating Feeder

MGD series vibrating feeder is designed for ultra-heavy working conditions and is suitable for feeding materials to primary jaw crushers, primary impact…

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MGB series hopper discharge feeder

MGB series hopper discharge feeder

MGB series hopper discharge feeder is mainly used for the uniform, quantitative and automatic control of under-silo feeding of bulk materials.…

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MZA/K Series Circular Vibrating Screen

MZA/K Series Circular Vibrating Screen

MZA/K series circular vibrating screen produced by Meilan has an axis-eccentric circular vibrating screen, which can be used for dry and wet classification…

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  • OBORTS Company, Opposite the residence of old General Mambou, Near Dragage, Bastos, Yaoundé, Cameroon
    Email: [email protected]

  • Coal Handling Plant Alignment Standards For Shaft To …

    For axial alignment it should satisfy e = j, k = l and u = v & In e, j, k, l, u, v, which is the greater, is the axial movement of shaft. This can be combined or indivisusal result of improper bearing loading and relative movement of shaft with respective inner race of bearing. This axial movement can be less than actual axial movement.

  • US2747803A - Hammer rotor for hammermills - Google Patents

    US2747803A US297905A US29790552A US2747803A US 2747803 A US2747803 A US 2747803A US 297905 A US297905 A US 297905A US 29790552 A US29790552 A US 29790552A US 2747803 A US2747803 A US 2747803A Authority US United States Prior art keywords hammer rotor wedge hammermills rotor base Prior art date 1952-07-09 Legal status (The legal status is an assumption …

  • GER-4212 - GE Generator Rotor Design, Operational Issues

    GE Power Systems GER-4212 (08/01) 2 GE Generator Rotor Design, Operational Issues, and Refurbishment Options COUPLING COIL SLOT RETAINING RING BALANCE PLUG FAN COLLECTOR

  • Handling shaft deflection, runout, vibration, & axial motion

    Full Indicator Movement (F.I.M.). Dynamic runout under actual operating conditions is often difficult or impossible to measure, and is typically greater than the measurements gathered while rotating the shaft slowly in a shop setting. Assuming the same magnitude of …


    bearing and surface of the housing. A retaining ring’s axial contact with the bearing causes the rotational movement of the ring, resulting in the failure. 2. A rotating gear is fixed by a retaining ring. As the axial friction between the gear wheel and the retaining ring is greater than the …

  • Understanding end play and its impact on axial alignment

    If the motor has sleeve bearings, axial movement is expected within the limits of the bearing design. Most rolling element bearings have much less axial clearance but must be contained in the bearing housing to control the end play. LOGIN TO VIEW AND DOWNLOAD THE ARTICLE

  • Resonance - General

    Phase will shift 180° as the rotor passes through the critical. This is due to the rotor changing from a rigid rotor (while operating below it's critical) to a flexible rotor (while operating above it's critical). It practical terms, on a rigid rotor, the heavy spot pulls the rotor around as it rotates.

  • Cause Analysis and Problems Solving of Jaw Crusher

    Dec 10, 2019· 4 The bushing occurs axial movement. 5 Bearing is worn or cage is damaged, etc. 6 It is non-bearing temperature rising, but the sealing sleeve of the movable jaw rubs with the end cap, which causes friction heating, or the double embedded cover of the frame bearing seat and the spindle rotate together, causing friction and heat.

  • High voltage motor magnetic center and the Axial drift of

    Oct 24, 2018· The rotor was found to be moved towards the desired magnetic center easily. This establishes that the axial drift of the rotor has a very low thrust. However the thrust exerted by the rotor if it were to be retained at the physically identified (desired) magnetic center. So the rotor will be adjusted to the original magnetic center at rest and

  • Vibration Due To Shaft Misalignment Manufacturing

    Oct 21, 2009· The reason for this is that misalignment may restrain movement in one or more directions. In one instance, the author was called to a plywood plant to help balance a knife hammer mill. Before his arrival, the site vibration analyst collected vibration data and determined that one of the problems with the hammer mill was rotor imbalance.

  • Driven Equipment - an overview ScienceDirect Topics

    Jane Blunt, Nigel C. Balchin, in Health and Safety in Welding and Allied Processes (Fifth Edition), 2002. Engine-driven equipment. Engine-driven equipment should be sited so that no danger to health arises from the exhaust gases.Care should be taken to ensure that the plant is on a level platform and that the brakes have been applied or chocks fitted under the wheels to prevent movements from

  • Axial movement of large synch motor - Electric motors

    Apr 25, 2010· More likely leveling / axial magnetic centering issue or even an excessive axial thrust by one side centrifugal fan. I have seen one case where the centrifugal fan forced the rotor axially away from its mag center but since the bearings had a longer axial play, it was not an issue.


    Permanent-magnet machines generally can be axial-°ux or radial-°ux [11]. Advantages of axial-°ux permanent-magnet (AFPM) motors over conventional radial-°ux permanent-magnet (RFPM) motors include high torque-to-weight ratio, good e–ciency, adjustable air-gap, balanced rotor-stator attractive forces, and better heat-removal [12{14].

  • Mechanical Impact Noise Analysis of Rotary Compressor

    pump-rotor unit, were particularly carried out for the purpose of identifying the noise source. The results confirmed that the axial up-down movement of pump-rotor unit was the primary reason…

  • End Play (Axial Clearance) on a Thrust Bearing: Kingsbury

    End play is the total distance the shaft can move between the two thrust bearings and is sometimes called float, thrust bearing clearance or axial clearance. Typical values of end play can be calculated by the following formula: EP (mils) = 0.9 * Babbitt Outside Dia. (in.) + 6. Example: a 10.5" thrust bearing would require .015" of end play.

  • What causes the axial movement of a generator rotor? - Quora

    The rotating field and the stationary field of a generator or motor have an axial sweet spot or ‘magnetic center’ where the two components exert only balanced radial and tangent forces on each other. If they are not axially aligned correctly the rotor will forever be pulled in one direction or the other.

  • Crusher - Wikipedia

    A crusher is a machine designed to reduce large rocks into smaller rocks, gravel, sand or rock dust.. Crushers may be used to reduce the size, or change the form, of waste materials so they can be more easily disposed of or recycled, or to reduce the size of a solid mix of raw materials (as in rock ore), so that pieces of different composition can be differentiated.

  • Crushers - All crusher types for your reduction needs

    The first shaft is a pivoting shaft on the top of the crusher, while the other is an eccentric shaft that drives both toggle plates. The chewing movement, which causes compression at both material intake and discharge, gives the single toggle jaw better capacity, compared to …

  • Case Study: Locking Assemblies for Securing Rotors in

    It must be ensured even in extreme cases, e.g. overload of the crusher, that no damage to the system can occur. On the other hand, no reduction of the minimum pressure is permissible during such occurrences, as this would cause so-called “axial rotor wandering” or shaft …

  • Common Faults and Solutions of Cone Crusher Quarrying

    The reason. The gear installation is unqualified, the meshing is poor, the clearance is too large, the axial clearance of the transmission shaft is too large, or the gear is damaged. Solution. Correct the meshing gap or replace the gear. 13. Support ring bounce. The reason. Metal or other hard objects that cannot be crushed fall into the

  • Sealing High-Speed Shafts in Turbomachinery Pumps & Systems

    Jun 12, 2019· Although not subject to rotational forces, it should be free to slide and accommodate the axial movements of the rotor, whatever the seal’s state of pressurization. As a direct result of the means in which the thrusts on the pinion shafts of integrally geared compressors are managed, the seal should be able to cope with constant axial deviations.

  • Differential expansion of steam turbine generators

    Aug 09, 2011· To allow unrestricted growth of the turbine rotor assembly, the machine rotor is restricted from axial movement within the machine case at one fixed point and allowed to move from that point. The point at which this attachment is made is at the machine’s thrust bearing. Figure 3 and Figure 4 represent two examples of turbine generator machine

  • Brushless DC electric motor - Wikipedia

    Background. Brushed DC motors were invented in the 19th century and are still common. Brushless DC motors were made possible by the development of solid state electronics in the 1960s.. An electric motor develops torque by keeping the magnetic fields of the rotor (the rotating part of the machine) and the stator (the fixed part of the machine) misaligned. One or both sets of magnets are

  • Axial Movement - an overview ScienceDirect Topics

    When flexibility for this movement cannot be designed into the piping system itself, an expansion joint is the ideal solution. There are four basic movements that can be applied to a bellows. These are axial, lateral, angular, and torsional as illustrated below. Bellows behave like springs in a piping system.

  • Steam Turbine Rotor Vibration Failures: Causes and Solutions

    Apr 01, 2013· Finally, uncompensated movement of steam pipes connected to the casing can cause casing movements and rotor vibration. This is particularly true for large-diameter pipes with thick walls.


    erable movement of the inner or outer ring, the mounting surfaces Outer ring slippage (bores, outer diameters, h] will caused by improper wear and heat (see photo), causing hoo~ing fits. noise and runout problems. Consult Barden C-10 catalog or Barden Engineering for fit recommendations.

  • Two direction axial movement of steam turbine shaft AMP

    Apr 04, 2007· This machine is driving a multistage centrifugal pump. Whenever machine is started its high speed shaft axial movement is in the normally expected direction due to thrust caused by sigle helical gear teeth on bull and HS Shaft. After some days or months of operation HS shaft thrust changes direction and goes to counter side to a greater degree.

  • Understanding end play and its impact on axial alignment

    Jim Bryan EASA Technical Support Specialist End play in an electric motor is the amount of axial movement allowed by the motor’s construction. This end play is limited by the motor’s bearing design. The bearing’s primary purpose is to locate the shaft radially so it can be aligned to the driven equipment shaft and efficiently transmit torque to the load. It is also important that the

  • US4923131A - Rotary impact crusher rotor - Google Patents

    This invention relates to rotary impact crusher rotors used to communicate rock and to such rotors which are of substantially triangular shape having outlets at the apices of the triangle. This results in a rotor having reduced wearing surfaces and also avoids destruction or explosion of the rotor in the event of an excessive build up of rock in the crusher chamber.

  • Handling shaft deflection, runout, vibration, & axial motion

    Full Indicator Movement (F.I.M.). Dynamic runout under actual operating conditions is often difficult or impossible to measure, and is typically greater than the measurements gathered while rotating the shaft slowly in a shop setting. Assuming the same magnitude of …

  • Brushless DC electric motor - Wikipedia

    A brushless DC electric motor (BLDC motor or BL motor), also known as an electronically commutated motor (ECM or EC motor) or synchronous DC motor, is a synchronous motor using a direct current (DC) electric power supply. It uses an electronic closed loop controller to switch DC currents to the motor windings producing magnetic fields which effectively rotate in space and which the permanent

  • Maintenance and Troubleshooting of Progressing Cavity …

    inward on the rotor, or shrink away from the rotor. • This changes the compressive fit between the rotor and stator. Again, to keep a standard fit, the Rotor requires under sizing above 130 º, and over sizing below 50º. • Under extreme heat or cold, elastomer Stators may not be appropriate.


    mechanically limits the axial movement. The amount of axial movement on a double helical pinion is typically large enough that if sufficient clearance was designed into the impeller and volute to avoid potential impact the aerodynamic efficiently is greatly reduced compared to what can be accomplished with single helical gearing..

  • Common Causes of Motor Failure & How to Prevent Them

    Apr 09, 2021· Winding failure only accounts for 16% of reported motor failures. Winding failure can occur for a few reasons including:. Overloading: Motor windings can begin to fail due to over-loading at the motor shaft which causes excessive heat build-up and eventually motor failure.A thermal overload relay is a common method used to protect against over-load.

  • Omega Caliber 8800 / 8801 Specifications & Details

    Apart from that, the two movements are identical and share the same specifications. So let’s look closer at the specifications of the Omega caliber 8800 and 8801. Omega Caliber 8800 and 8801. The caliber 8800 is a self-winding movement with a co-axial escapement. The rotor is winding in both directions.

  • Electric Motor for Rotation and Axial Movement - SIEMENS

    The mounting for combination motors needs to be suitable both for the rotary movement and for the translatory movement or linear movement in the axial direction. for which reason it is also As a result of the fact that the bearings L 1 and L 2 are located within the external rotors, the axial physical length of the combination drive can

  • Axial hunting of 2-pole motors: Causes and cures

    Opposite poles attract; like poles repel. The magnetic field rotating within the stator turns the rotor, and magnetic force affects the axial position of the rotor relative to the stator core. LOGIN TO VIEW AND DOWNLOAD THE ARTICLE Related Reference and Training Materials

  • What is the reason for using a coupling with limited end

    However, this feature of the coupling prevents a rotor shaft supported in sleeve bearings from being properly aligned to the specified values. It is, therefore, necessary to use a coupling with limited end float. RINGFEDER® limited end float gear coupling. As this denomination suggests, a defined end float in the axial direction is provided for.

  • Driven Equipment - an overview ScienceDirect Topics

    In many cases, the shaft end axial growth will exceed the dry, flexible coupling, maximum axial movement dimension. In these cases, the coupling is not assembled in a neutral position, but is either pre-compressed or pre-stretched, so that the installed coupling assembly will ensure that the maximum safe amount of movement will not be exceeded

  • End Play (Axial Clearance) on a Thrust Bearing: Kingsbury

    The end play should be verified by checking the axial movement of the shaft. The shaft should be moved in each direction and loaded with a force equal to between 50 to 150 psi bearing unit load. This is important to make sure the bearing shoes and leveling plates are set in their correct positions and that shims and filler plates are flat.

  • Rotor Axial Movement Identification - The Snell Group

    Figure 1: Possible Rotor Axial Movement Current signature is an excellent method for identifying axial movement of the rotor. The current distortion caused by the axial movement causes a noticeable distortion at the fifth harmonic of the fundamental for 60 HZ that would be 300 HZ. The distortion causes a split peak at the fifth harmonic.

  • 14 Cone Crusher Common Problems And How To Fix Them M&C

    First of all, you should find out the reasons for the sudden stop of the cone crusher, there are 5 common reasons: 1. The discharge port of the cone crusher is blocked, too much or uneven feeding will lead to the blockage of the discharge port, resulting in excessive production load of the crushing machine, resulting in the fracture of the fuse

  • Sources of vibration and their treatment in hydro power

    Apr 01, 2017· Rotor: Vibrations on the rotor may also be due to the same reasons those mentioned for the runner along with another reason i.e. rotor rubs . 2.2. Reasons for vibrations on non-rotating equipment • Draft tube: Cavitations, Power Swings and Draft Tube Resonance. • Seal erosion: Depends on water quality. • Penstock resonance: Cavitations •

  • Hammer crusher structure and working principle ZY mining

    Apr 07, 2020· The rotor is the main working part of the hammer crusher. The rotor is composed of the main shaft, hammer disc, pin shaft, hammer head, etc., and the pin holes are evenly distributed on the disc. In order to prevent the disc and hammer head The axial movement of the shaft is fixed at both ends of the pin shaft with a lock nut, the rotor is


    These crushers use a high speed rotor that has its axis along the vertical axis. The vertical-shaft impact crusher can be considered a stone pump that can operate like a centrifugal pump. The material is fed through the center of the rotor, where it is augmented to high speeds before being cleared through openings in the rotor sideline.

  • US4925114A - Impeller bar installation and repositioning

    The impeller bars on an "open" type rotor of an impact crusher are clamped to each disc of the rotor by means of pairs of cooperating wedges. Each pair of wedges consists of a first wedge acting radially outwards of the rotor between the disc and the impeller bars and a second wedge acting axially of the rotor between the disc and the first wedge to drive the first wedge radially outwards.