SU141887A1 - Device for controlling the hydraulic transmission of a locomotive - Google Patents

Description

Control devices for locomotive hydraulic transmission are known, consisting of pistons and distribution valves. The movement of the spools is carried out by the pressure of the fluid coming from the two impulse pumps, driven by the primary and secondary hydraulic transmission shafts, depending on the speed of rotation of the diesel shaft and the speed of the locomotive.

The described device differs from the known ones in that it uses a pneumatic shut-off mechanism, made in the form of regulating zolotoiki, interacting with the pistons by means of spring-loaded pushers. The device provides fast gear shifting in a given range of speeds of movement. In addition, to ensure the stability of the device when changing the speed of rotation of the diesel shaft during a gearshift period, it is equipped with an effective spool valve, which stops the access of oil from the primary pump to the ground during the transition process.

ha the drawing shows a diagram of the hydropanel with a pneumatic shut-off device. (The position of the hydropannel elements corresponds to the transition state between // and /// gears).

At the position of the driver's controller, corresponding to the idle speed of the engine, the switch-on valve is closed and the air through the channel / does not flow into the cavities of the distribution spools 2 and 5. The transmission is in the neutral position (the pipe transformer is disconnected). Under the pressure of air entering through channel 4, the blocking spool 5 is kept in the leftmost position, or which opens the passage of oil through channel 6 in the cavity of measuring pins 7 and 8. The blocks of measuring pistons 7 and S are in positions depending on the speed diesel locomotive and engine speed. Hydropanel prepared for the inclusion of transmission.

When the controller is moved to one of the working positions, the switch-on valve opens and the air enters / enters the cavities of the part No. 141887-2 p1Secure sqjiOTHI oB 2 and 5. At the same time, the spool 5 is at the right position, and the air from it enters the device a) On / off. As the locomotive accelerates, the number of revolutions increases and the oil pressure in the second pump pump line goes through channel 10, which enters the measuring cavity of the piston, 7, ...,. moving it to the left. As a result, Mon & Vmai 1 | is triggered (kyotsechny mechanism and the spool 3 transfer Tc to the extreme right position. Air through the channel // enters the device to activate // the transfer, and channel 9 of the transmission / transfer is connected to the atmosphere. Further accelerating the locomotive, the secondary pump increases the oil pressure in the channel 10 and the measuring piston unit 5 begins to move to the left. The pneumatic shut-off mechanism is activated and the distribution valve 2 is moved to the extreme right position. 12 enters the devices for switching on the /// transmission, and channel 1 is connected to the atmosphere, and // the transmission is switched off.

The operation of the pneumatic shut-off mechanism (when shifting from II to III gear). The pneumatic shut-off mechanism includes: adjusting spools 13, 14, 15 v (16 with springs 17 and pushers 18; blocking relays - spool 5, valve 19, throttle 20 and springs 21 and 22.

The measuring piston unit 8 is moved to the left from the rightmost position. Under air pressure, the spool 16 is held in the extreme right position, and the distribution spool 2 in the extreme left position. Enable // transfer. Upon further movement of the measuring piston unit 8 to the left, the pusher 18 moves the adjusting spool 15 to the left, opening the passage of air into its right cavity, which at the same time moves abruptly all the way to the left. The air from the left cavity of the spool 16 goes into the atmosphere. At the same time, an air passage opens to the left cavity of piston 23 of spool 2. Air forces on both sides of spool 2 are equalized, but the system does not move until the spool 16 opens the channel for air to escape from the right cavity of piston 24 to the atmosphere. When the slide valve 16 reaches the stop to the left, air is released from the right cavity of the piston 24 to the atmosphere, and the slide valve 2 moves to the right. For some time, the piston 24 communicates with the atmosphere the cavity of the blocking relay, when the pressure decreases in which the spring 22 pushes the shut-off valve 19 all the way to the left, and the spring 21 moves the locking slide 5 to the right. When the spool 2 takes the extreme right position, the air from its inner the cavity will enter through channel 12 into devices for switching on /// transmission. The locking spool 5 reaches the stop to the right and closes the oil supply channel 6 from the primary pump and closes the shut-off valve 19. When the valve 19 is closed, the internal cavity of the locking relay turns out to be closed, and the air flowing through the throttle 20 moves the spool to the left slowly. After some time, channel 6 reopens to transfer pressure pulses from the primary pump to the measuring piston units.

The locking time is regulated by turning the throttle screw 20 and tightening the spring 2.

Subject invention

1. A device for controlling the hydraulic transmission of a locomotive, consisting of pistons and distribution spools, in which the spools, which allow air to reach the actuators of the speed stages, are mixed, are pressurized by a fluid (oil) coming from two impulse pumps driven in motion