RU117381U1 - PASSENGER CAR BOX HEATING CONTROL SYSTEM - Google Patents

Abstract

A system for monitoring the heating of axleboxes of bogies of a passenger car, including temperature sensors located on the axleboxes of bogies with output signals that change depending on changes in the temperature of the axleboxes, an electronic device installed in the car for processing the output signals of temperature sensors and a device for warning and signaling, characterized by that the temperature sensors are integral, connected in parallel and connected to an electronic device for processing the output signals of the sensors, which is made in the form of a microprocessor signal processing unit and connected to an on-board recorder installed in the switchboard of the automatic control, monitoring and diagnostics distribution system, which is equipped with a display for display of output signals of integral temperature sensors.

Description

The utility model relates to the field of passenger carriage building and relates to the axle box heating control system (SKNB) of passenger carriage trolleys.

Known SKNB passenger carriage trolley "Electrical equipment of passenger cars with air conditioning" B.N. Rebrik, G.G. Gomola, S.N. Model, Moscow "Transport", 1986, pp. 162-164 (Fig. VI / 25). On K / k and SK / k wagons, a system with fusible sensors is installed. Eight sensors (eight boxes) are connected in series. A relay is connected through this circuit. During normal operation of all axlebox bearings, their temperature is lower than the melting temperature of the insert. In the event that the temperature of any axle box rises to 90-110 ° C, the fuse of the sensor melts, the circuit opens, the relay de-energizes, which leads to the closure of the sound and light alarm circuit by the contact, which indicates overheating of one of the axle boxes. Sensors are connected to SKNB with plug connectors.

The disadvantages of the analogue include the appearance of false signals along the route, which most often occur due to mechanical violations of the integrity of the circuit in the sensors themselves (between the fusible insert and the sensor wires), in the plug connectors and in case of wire breakage; the impossibility of determining a specific emergency axle box, the inability to trace the trend of temperature rise in the emergency axle box, as well as the one-time operation of the sensor with its mandatory replacement.

The prototype of the utility model is the “Non-Coupe Passenger Carriage” described in the technical description and operating instructions published by the Ministry of Heavy, Power and Transport Engineering, site. No. 318351207, Kalinin, 1988, pp. 83-84.

The axle box heating control system (SKNB) of the trolleys is designed to alert maintenance personnel about the emergency condition of axle box bearings. SKNB includes eight temperature sensors (one for each axle box assembly) interconnected in series, an electronic device for processing sensor output signals (axle box heating control unit (BKNB) installed in the control panel, warning and signaling devices (signal lamp with a red filter) , electric bell).

BKNB is designed to process temperature signals and to alert (with a bell and a signal lamp) that the axle box body has warmed up to dangerous limits as a result of a roller bearing malfunction or of malfunctions in the electrical circuits of the temperature sensors.

The temperature sensor consists of a thermosensitive element (thermistor), which is mounted in a brass body. All temperature sensors are connected in series and receive power from BKNB. When exceeding the permissible values of the heating temperature of the axle box, the thermistor heats up, the ohmic resistance increases, as a result of which BKNB gives a continuous sound and light signals. In the event of a short circuit in the temperature sensor circuits or an open circuit, the BKNB emits intermittent sound and light signals.

The disadvantages of the prototype include: a wide variation in the parameters of the sensors and unreliable operation of semiconductor devices associated with the "swimming" of the operating points of the devices to a significant extent when changing the temperature conditions of the BKNB (temperature instability), do not allow widespread use of this device to control the heating of the axle boxes of cars .

The purpose of the utility model is to ensure that the actual temperature of each axle box is recorded and the automatic control, monitoring and diagnostics (SAUKD) system displays the output signals of the integrated temperature sensors, which ensures high reliability of the SKNB and the prevention of emergency situations.

The essence of the utility model is that integrated temperature sensors are used, which are interconnected in parallel and connected to an electronic device for processing the output signals of the sensors, which is made in the form of a microprocessor-based signal processing unit (MBO) and connected to an on-board recorder installed in the distribution panel automatic control, monitoring and diagnostic systems (SHR SAUKD), which is equipped with a display for displaying the output signals of integrated temperature sensors.

The essence of the utility model is illustrated by drawings, where:

in FIG. depicts a structural diagram of a control system for heating the axle boxes of passenger carriage bogies.

SKNB of passenger carriage trolleys includes integral temperature sensors 1 installed on each axle box, a microprocessor-based signal processing unit (MBO) 2 installed inside the passenger carriage, ensuring high reliability of the axle heating control system.

Temperature sensors 1 and MBO 2 are connected to the switchboard of the automatic control, monitoring and diagnostics system (SHR SAUKD) 3 as follows: wires 4 and 5 of temperature sensors 1, which are connected in parallel, are connected to the switching inputs of the MBO 2. The switching outputs of the MBO 2 through a standard joint 6 are connected to the switching inputs of the on-board recorder 7, which is located in the SRS SAKD 3.

SKNB of passenger carriage trolleys works in this way: when the axle box reaches 70-75% of the critical temperature (65-70 ° C), temperature sensor 1 transmits a signal to the MPO 2, which through a standard junction 6 transmits a signal to the on-board recorder 7, then on the screen of display 8, a “Warning” light appears and intermittent sound signaling is performed using speaker 9 integrated in the ballast control system of sound control system 3.

Upon reaching the set threshold of the emergency temperature (94 ± 4 ° C), temperature sensor 1 transmits the readings to the MBO 2, which through a standard junction 6 transmits a signal to the on-board recorder 7 and the light signal “Overheat of the axle box” and a constant tone signal of the speaker appear on the display screen 8 9.

Using SKNB of passenger carriage trolleys allows:

- record the actual temperature of each axle box;

- to trace trends in temperature rise in emergency boxes,

- programmatically set the threshold and the signal when a certain temperature is reached, which makes it possible to prevent accidents when the box reaches a temperature of 70-75% of the critical;

- diagnose the health of all sensors, wiring, check for "leaks" on the housing of the sensor circuits;

- make internal diagnostics of the microprocessor complex;

- measure the temperature of the axleboxes of the remaining sensors in case of failure or break in the circuit of one or more sensors on the car;

- when fixing an emergency situation, sensor replacement is not required;

- transfer all information about the operation of the SKNB to the switchboard of the automatic control and diagnostic control system (SR SAUKD) and display it in real time on the display:

- register information on the operation of SKNB with the on-board recorder for possible analysis.

The technical result achieved from the use of SKNB is to increase the reliability of SKNB and improve the quality and ease of use due to the possibility of registering the actual temperature of each axle box and displaying it on the display of ShchR SAUKD.

The claimed technical solution is used in JSC "Kryukovsky Carriage Works" in the manufacture of passenger cars on trolleys mod. 68-7007, 68-7012, 68-7013.

Claims (1)

A control system for heating the axle boxes of passenger carriage bogies, including temperature sensors located on the axle boxes of trolleys with output signals that change depending on the temperature of the axle boxes, an electronic device installed in the car for processing the output signals of temperature sensors and a warning and alarm device, characterized in that the temperature sensors are integral, interconnected in parallel and connected to an electronic device for processing the output signals of the sensors, which It is designed as a microprocessor-based signal processing unit and is connected to an on-board recorder installed in the switchboard of a distribution system for automatic control, monitoring and diagnostics, which is equipped with a display for displaying the output signals of integrated temperature sensors.