RU203437U1 - Universal stand for fault detection of marine diesel engine parts - Google Patents

Abstract

The utility model relates to the field of defective detection of parts by determining the degree of their suitability for reuse at the repaired facility or restoration of their operability. In the process of flaw detection, the part is controlled by parameters that change during their previous operation. A universal stand for flaw detection of parts of marine diesel engines, containing a support table, a spindle fixed to it, means for monitoring deviations of disc sizes from nominal, containing contact and / or non-contact indicators located on the support on the side of the end and cylindrical surfaces of the disk, and the indicators are made with the ability to monitor deviations of the disk dimensions from the nominal and display the results of its fault detection at different angular positions of the disc, and the universal stand for fault detection of parts of marine diesel engines is additionally equipped with a device for measuring the coercive force stationary stands with a prism-magnet "+" and a prism-magnet "-", a stand is movable, which moves along the worm shaft with a worm valve and is equipped with a coercive prism connected through a magnetic field transducer to a coercive indicator The claimed utility model ensures the detection of internal defects in the parts of marine diesel engines by the value of the coercive force of the material.

Description

The utility model relates to the field of defective detection of parts by determining the degree of their suitability for reuse at the repaired facility or restoration of their operability. In the process of flaw detection, the part is controlled by parameters that change during their previous operation.

Known stand for fault detection of wheel disks of passenger cars (patent No. 84535 RF, IPC G01B 5/00. Publ. 10.07.2009), containing a support table, a spindle fixed on it for installing wheel disks with the ability to rotate and means for monitoring deviations of the size of the disks from the nominal , the spindle, including the bearing unit, the bearing shaft, the support flange, the shank and the clamping device for fixing the wheel disks, is fixed parallel, perpendicular or at an angle to the table top of the support table, and the means for monitoring the deviations of the disks from the nominal are equipped with an indicator in the form of a probe with the possibility of it moving and fixing in a given position relative to the outer surfaces of the disc rim. The hold-down device contains spacers in the form of cylindrical and centering tapered bushings placed on the shank between the support flange and the hold-down nut, and the stand includes a spare set of said spacers for fixing disks from different manufacturers on the spindle. The indicator probe is equipped with a tip in the form of a cone, a hemisphere or a movable roller, connected to a displacement meter and mounted on a holder made in the form of a plate with an annular magnet to hold it on the table top of the support table, in the form of a flat two-link mechanism or in the form of a horizontal bar articulated with vertical rack. The stand is equipped with a spindle electric drive and a control panel for controlling its rotation speed.

The disadvantage of the stand for flaw detection of wheel disks of cars and motorcycles is the lack of adjustment of the electric drive of the spindle.

The closest analogue is a system for flaw detection of wheel disks of cars and motorcycles (patent No. 123522 RF, IPC G01M 17/013. Publ. 27.12.2012), containing a support table, a spindle fixed on it for installing wheel disks with the possibility of rotation and means for monitoring deviations dimensions of discs from nominal, means for monitoring deviations of disc sizes from nominal contain contact and / or non-contact indicators located on the support from the side of the end and cylindrical surfaces of the disc, mainly in the same plane with its axis, and the indicators are made with the possibility of simultaneous or alternate control of deviations of dimensions disk from nominal and displaying the results of its flaw detection at various angular positions of the disk. The system for flaw detection of wheel disks of cars and motorcycles is equipped with a control panel and an adjustable electric drive of the spindle, contact indicators are made in the form of a spring-loaded mechanical probe with an electromagnetic or mechanical displacement sensor, and non-contact indicators are equipped with an LED emitter with an optical sensor for measuring the distance to the surface of the disk, and the support of the indicators is made in the form of a common plate, and the electrical outputs of the indicator sensors are connected through a multichannel amplifier with a control panel for displaying the results of disk defect detection on its indicator panel.

The disadvantage of the system for flaw detection of wheel disks of cars and motorcycles is the lack of systematization of parts of marine diesel engines by chemical composition.

The task of the utility model is the detection of internal defects in the details of marine diesel engines.

The technical result consists in the development of a device for measuring the coercive force.

The technical result is achieved by the fact that a universal stand for flaw detection of parts of marine diesel engines, containing a support table, a spindle fixed on it, means for monitoring deviations of disc sizes from nominal, containing contact and / or non-contact indicators located on the support from the side of the end and cylindrical surfaces of the disc, moreover, the indicators are made with the ability to control deviations of the disk dimensions from the nominal and display the results of its fault detection at various angular positions of the disc, characterized in that the universal stand for fault detection of parts of marine diesel engines is additionally equipped with a device for measuring the coercive force, which contains fixed racks with a prism-magnet "+ "And a prism-magnet" - ", a movable stand, which moves along the worm shaft with a worm valve and is equipped with a coercive prism connected through a magnetic field transducer to a coercive indicator.

Comparative analysis with the analogue shows that the declared universal stand for fault detection of parts of marine diesel engines meets the criterion of "novelty", as it differs from the prototype.

1. A universal stand for fault detection of parts of marine diesel engines is additionally equipped with fixed stands with a prism-magnet "+" and a prism-magnet "-".

2. The supporting table is additionally equipped with a movable stand.

3. The mobile stand moves along the worm shaft with a worm valve.

4. The movable stand is equipped with a coercive prism.

5. The coercive prism is connected to the magnetic field transducer.

6. The magnetic field transducer is connected to a coercive indicator.

To measure the detection of internal cracks in parts of marine diesel engines by the value of the coercive force, the universal stand for fault detection of parts of marine diesel engines is additionally equipped with a coercive device. Coercive force is one of the main parameters that takes into account the magnetic properties of the material from which the part is made. Coercive force is the value of a magnetic field with an intensity that must be applied to a ferromagnet, previously magnetized to saturation, in order to bring its magnetization or magnetic field induction to zero. According to the magnitude of the coercive force, magnetic materials are divided into soft magnetic and hard magnetic materials. The magnitude of the coercive force is determined by the mechanism of magnetization reversal and is a structurally sensitive characteristic of the material. The coercive force is influenced by the total specific surface of the grains, residual mechanical stresses, and material defects. The greater the defectiveness of the material and the less the homogeneity of the structure, the greater the coercive force, and, accordingly, the lower the magnetic permeability. This is due to the fact that the presence in the samples of various impurities, crystal lattice defects.

For rigid installation of parts on a universal stand, the coercive device contains fixed racks.

For magnetizing parts by connecting to positive and negative sources of technological current, the coercive device contains a prism-magnet "+" and a prism-magnet "-".

For the possibility of measuring the coercive force at any point, the coercive device contains a movable stand, which moves along the worm shaft with a worm valve.

To remove the residual magnetic field from the parts of marine diesel engines, the movable rack is equipped with a magnetic field prism.

To convert the residual magnetic field into a current of the magnetic field, the coercive prism is connected to the transducer.

To convert the magnetic field current into coercive force, the transducer is connected to a coercive indicator

The figure shows a universal stand for flaw detection of parts of marine diesel engines, containing a support table 1 and a coercive device 2, which consists of a stationary stand 3 with a magnet prism "+" 4 and a prism magnet "-" 5, a movable stand 6, which moves along a worm shaft 7 with a worm valve 8, and contains a prism of a magnetic field 9, connected through a converter 10 to a coercive indicator 11.

A universal stand for fault detection of parts of marine diesel engines works as follows. Parts of a marine diesel engine of the "shaft" type, made of ferromagnetic material, are installed in a prism-magnet "+" and a prism-magnet "-", which are located on fixed posts 3. Further, the parts are magnetized by connecting a prism-magnet "+" to a positive , and prism-magnet "-" - to a negative source of technological current. Then the impact of the technological current is terminated. The magnetic field prism 9 is moved to the desired surface of the part along the worm shaft 7 by rotating the worm valve 8. The magnetic field prism 9 removes the residual magnetic field from the surface of the part and converts it into a magnetic current using the converter 10 and is transmitted to the coercive indicator, which shows the value of the coercive strength. According to the value of the coercive force, the optimal modes of magnetization of the ferromagnetic powder are assigned. If you do not take into account the value of the coercive force, then the ferromagnetic powder is concentrated on the risks from mechanical surface treatment.

Taking into account the value of the coercive force of the material makes it possible to uniformly magnetize the ferromagnetic powder on the part without internal defects. If the part has internal defects, then the ferromagnetic powder forms indicator patterns, repeats the shape of internal defects.

The claimed utility model provides the detection of internal defects in the details of marine diesel engines by the value of the coercive force of the material.

Claims (1)

A universal stand for fault detection of parts of marine diesel engines, containing a support table, a spindle fixed on it, means for monitoring deviations of disc sizes from the nominal ones, containing contact and / or non-contact indicators located on the support from the side of the end and cylindrical surfaces of the disc, and the indicators are made with the ability to control deviations of the disk dimensions from the nominal and displaying the results of its fault detection at different angular positions of the disc, and the universal stand for fault detection of parts of marine diesel engines is additionally equipped with a device for measuring the coercive force, which contains fixed stands with a prism-magnet "+" and a prism-magnet "-" , a movable stand, which moves along the worm shaft with a worm valve and is equipped with a coercive prism connected through a magnetic field transducer to a coercive indicator.

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