Defektoskopie mobile tool condition monitoring of railway track

 

The invention relates to a device for non-destructive condition monitoring of railway track. On the undercarriage frame based. On the frame is mounted to the body, consisting of cockpit and cabin. There are also power and auxiliary equipment, the system of magnetic control with magnetizing coils. One of the driving trucks made defectoscopes by placing the magnetizing coils on the wheelset axles with radial and axial clearances through the combined hydrodynamic bearings with a gas-static system load balancing and charge bearings from falling into the friction zone of abrasive dust. Fixing the supports against rotation is reactive rods. Between the wheel pairs is ultrasonic testing system. The cockpit enclosure is made with the frontal wall in the form of a convex surface formed by two planes, connected by a horizontal straight line and continue side walls. In addition, mobile vehicle equipped with heat exchangers. At least one of the heat exchangers, as well as power and auxiliary equipment installed under the frame of the body. The device is characterized by high resolution and reliability of the work, what exactly devices of nondestructive testing instrumentation of the rail track installed on locomotives and cars, and can be used to identify defects in rails during movement of the vehicle on the railway track.

At high gruzoperevozki Railways there is a large variety of defects in rails. Under the influence of rolling stock due to insufficient strength of the metal and the availability of local inclusions in the base metal rail, as well as internal defects in welding in the head rail develop transverse cracks. Longitudinal cracks usually occur on the rounded working edge and extend into the rail head 8...11 mm

For the early detection of dangerous defects are means of nondestructive testing, namely means of magnetic and ultrasonic (hereinafter UT) testing. When this cracks located at a shallow depth, can be detected by the method of magnetic flaw detection, and formed at great depths and defects of a certain type - only ultrasound.

Railway transport is widely used cars, electronics, equipment is s reflected from physically foreign inclusions, or is equipped with a pleading look by induction device type, responsive to the change of the longitudinal component of the magnetic field above the rail (A. K. Gurvich. Non-destructive testing of rails. Transport, 1983; Production and quality control of rails on plants in some European firms (according to the materials of the international exhibition "Rail-892, Moscow, 1990, Min. Metallurgy of the USSR, S. 8-9; and.with. 1654084, the IPC 61 K 9/10; and.with. The USSR 1756192, the IPC 61 K 9/10, publ. 1992; U.S. Pat. RF 2126339, IPC G 01 N 29/04, publ. 1995; U.S. Pat. RF 2052807, 2060493, IPC G 01 N 29/04, publ. 1996). In particular, the application of the flaw detector car company "Sperry rail Service, equipped with ultrasonic testing equipment, in which each side is three wheel sensor type. One of the sensors sends an ultrasonic signal perpendicular to the sole of the rail, the other two prosvechivayut rail at an angle of 70...37. Due to this orientation of the ultrasonic waves are detected defects located in the head, neck and bottom rail, including in the area of the joint and bolt holes (IPU, cniitei. The series Path and the railroads. Vol.7. Rail flaw detection. Moscow, 1964. S. 26-28).

Famous cars detectors that are equipped with electromagnetic and ultrasonic inspection equipment for Def).

Magnetic seekers cars allow you to detect defects in the railhead, and by using the ultrasonic testing equipment detected the defects in the neck rail. These cars operate at a speed of 20 km/h Magnetic equipment of the car triggers the magnetic field in the track, and the magnetic seekers pass through the field. UT-installation of the car has two sensors. The ultrasonic waves are received in the rail through radiators located in the wheel sensors.

Used cars detectors are characterized by a high enough resolution and do not allow the inspection of rails across the section. Parameters magnetizing systems provide relatively easy magnetization types of rails at low vehicle speeds (up to 40 km/h).

As a prototype of the present invention, more of the characteristics of the selected rail inspection car (A. K. Gurvich. Non-destructive testing of rails. Transport, 1983, S. 164-166).

Equipment and apparatus flaw detector placed in the car. At the end of the car is the hardware Department, which are both remote control and distribution cabinets power supply defectoscopes equipment. Under the car between its suspension shall consists of a flat frame, two extreme wheelset and two medium. Between the middle wheel pairs posted by electromagnets suspended to the frame of the truck. Trolley rods connected to the frame of the car. For normal operation of the detector inductor cart with hanging on her electromagnets based on two average bezrabotnye wheelset without cushioning. The load distribution on the pair of wheels prevents derailment of the trolley with rails and keeps unchanged the magnitude of the air gap between the poles of an electromagnet and rails. The total mass of the cart electromagnets around 5 so When travelling to work in an unusable state induction trolley is lifted by means of the screw couplers and attached to the frame of the car. In the car-detector applied pleading look device induction type coil, responsive to the change in the magnetic field over the rail.

The main disadvantages of the flaw detector car, selected as a prototype are:

- not high enough resolution, due to the presence of large magnetic gaps between the electromagnets and the controlled section of rail track. The gap between the coil and the rail is 12...15 mm, which leads to lower tension is et to implement the only method of magnetic testing determining the surface quality of the rails. At the same time, internal defects that occur during operation can not be detected using the devices, the principle of which is based on the above method. In particular, the parameters of the magnetizing system does not enable the detection of defects located at a great depth;

the parameters of this magnetizing systems provide magnetization rails relatively light types (easier P50) at low speed on rails crawler. At high speeds, and when Defektoskopiya rails heavy types of flaw detection sensitivity truck for defects is reduced.

The task to be solved by the invention is to improve resolution and to ensure reliable operation defectoscopes mobile controls the track moving at optimal speed, allowing you to use the methods of magnetic and ultrasonic testing. The invention is also aimed at addressing the challenges to reduce energy costs and improve the usability of the device.

The invention consists in what is okopny, containing a frame, a body mounted on a frame, comprising, at least from the cabin, salon, as well as power and auxiliary equipment, two of the undercarriage, the magnetic control system with magnetizing coils mounted under the body, which according to the invention one of the chassis trucks made defectoscopes by placing the magnetizing coils on the wheelset axles with radial and axial clearances through the combined hydrodynamic bearings with a gas-static system load balancing and charge bearings from falling into the friction zone of the abrasive dust from the fixation of the bearings from turning jet rods and placement of ultrasonic testing between the wheel pairs, and the cockpit enclosure is made with the frontal wall in the form of a convex surface formed by two planes, connected by a horizontal straight line and continued lateral walls, with the slope of the upper surface of a front wall to a vertical plane, equal 40and tilt the bottom plane to the vertical plane, = 20back in the direction from a front wall to the roof of the cab at an angle 30in addition, least one heat exchanger is installed under the frame of the body.

To reduce losses in the magnetic circuit of the magnetizing coil provided with a magnetic core, the cross-sectional area equal to the cross-sectional area of the axis of the wheelset with the developed area of the ends of the supports.

Combined hydrodynamic bearing with a gas-static system load balancing and charge bearings from falling into the friction zone of the abrasive dust is made in the form of plain bearings with roller oil lubrication system (oil pan). Around the bearing sleeve is formed an annular groove for supplying air to the place evenly located around the circumference of the calibrated holes, giving a gap between the axis of the wheel and bearing liner of the gas cushion.

To reduce the resistance of the magnetic circuit support induction coils supplied elements-contactors, directing magnetic flux in the solid portion of the wheel pair.

Hoist system ultrasonic inspection can be performed by manual or pneumatic.

One of the running carriages movable means in the form of defectoscopes truck by placing the magnetizing coils on the axes stake the resolution defectoscopes funds and reliability at optimal speeds, its on rails and leads to the detection of surface defects, and defects throughout the cross section of the rail, including heavy types. The magnetic flux is formed in the axis of the wheelset, then the wheel and the rail between the wheel pairs. Due to the close contact between wheel and rail, the magnetic field strength is not reduced.

The combination of these features allows you to combine the process of magnetic and ultrasonic inspection control with minimal losses in the magnetic circuit, while ensuring high resolution and reliability of nondestructive control of railway track.

The embodiment of the casing of the proposed design streamlined due to the characteristics mentioned in the claims (the wrap angles of the frontal part: 40or about 40; 2020; 30or about 30), leads to a decrease in the resistance of the medium during movement defectoscopes means 1.5 times and thus provides a reduction in energy costs compared to known mobile means at the same speed.

Installing heat exchangers in the cockpit, the cabin and the main is under the frame of the body and allows the power equipment up to 80% in the cold season (instead of 30% of the machines-analogues).

Placing accessories under the frame of the body allows, it is advisable to use the useful area of the design and ensures ease of use mobile media.

Design flaw-detecting mobile media railcars defectoscopes shown in Fig.1, the design of the undercarriage, made in the form defectoscopes, - Fig.2, 3.

Defektoskopie mobile vehicle includes a frame 1, a body 2 mounted on a frame 1 consisting, at least from the cabin 3 cabin 4, and power equipment 5 and the auxiliary equipment 6 installed under the body 2, two of the undercarriage 7 (including biaxial), one of which is made defectoscopes. The electromagnetic coil 8 wound on an aluminum frame, mounted on axes wheelset 9 with radial and axial clearances. Between the wheel pairs 9 posted by the ultrasonic inspection system 10. Radial and axial clearances formed by the combined hydrodynamic bearings 11 with gas-static system 12 load balancing and charge bearings from falling into the friction zone of abrasive dust. Support 11 is further provided with reactive rods 13 and elements-contactors 14. The last direct magnetic flux alanah pallets 15. Ultrasonic testing system 10 is equipped with a lifting mechanism 16 (manual or contains pneumatic system) in the transport position.

On mobile tool placed heat exchangers, including in the cockpit, the cabin (figure not shown). In this case, at least one of them is 17 and a power of 5 and auxiliary equipment 6 installed under the frame 1 body 2.

The proposed complex diagnostic rails equipped with automated registration system, visualization, processing and storage of signals of ultrasonic testing of rails and a system for the registration and storage of information on magnetic media. Automatic processing and decoding signals according to their temporal and static data both during travel and in the Parking lot.

The operation principle of the proposed design

When driving defectoscopes means on the rails at a speed of 5...40 km/h on the induction coil 8 is supplied to a current that creates a magnetic flux in the axis of wheel pairs 9. The magnetic flux axis is closed through the wheels and lots of rails located between the wheel pairs 9. Induction sensor (figure not shown) slides on the surface of the rail and passing through the distorted magnetic field defective acetami powering the UI system 10, sensors which (figure not shown) are located between the wheel pairs 9. Simultaneous magnetic and ultrasonic testing of rails. In the process control uses a pulse-echo and mirror-shadow control methods at the contact method of introducing ultrasonic vibrations.

Mobile defectoscopy the complex allows to obtain reliable information about the quality of any parts of the path in the rails of the type R-50, R-65, R-75 for one passage with minimal energy costs.

Claims

1. Defektoskopie mobile tool condition monitoring of railway track, mainly rail inspection car or matrica defectoscopy containing supported on the undercarriage frame, a body mounted on the frame and consisting at least of the cockpit and cabin, as well as power and auxiliary equipment, the system of magnetic control with magnetizing coils, wherein one of the chassis trucks performed testing by placing the magnetizing coils on the wheelset axles with radial and axial clearances through the combined hydrodynamic bearings with a gas-static system load balancing and on which the wheel pairs is ultrasonic testing system, and the cockpit enclosure is made with the frontal wall in the form of a convex surface formed by two planes, connected by a horizontal straight line and continued lateral walls, with the slope of the upper surface of the frontal wall to the vertical axis equal to 40tilt the bottom plane to the vertical axis equal to 20back during the movement of the movable means and the transition from its walls to the roof of the cab at an angle 30in addition, mobile vehicle equipped with heat exchangers, with at least one of the heat exchangers, as well as power and auxiliary equipment installed under the frame of the body.

2. Means under item 1, characterized in that the hydrodynamic bearing is made in the form of plain bearings with roller lubrication system.

3. Means under item 1, characterized in that the hydrodynamic bearing is provided with elements that guide the magnetic flux in the rim of wheel.

 

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