RU1837021C - Traction unit two-production electro-mechanical transmission - Google Patents

Description

FIELD OF THE INVENTION FIELD OF THE INVENTION

The aim of the invention is to expand the functionality by providing automatic shockless switching on the go when transferring a unit from single-threaded mechanical to double-threaded operation.

Figure 1 shows a kinematic transmission scheme; Fig. 2 is a block diagram of a control unit for matching frequency of rotation; on .Z is a velocity diagram.

Transmission 1 connects the primary heat engine | 2 to the propellers 3 and the engine of the planetary gear 4, with two input links of which (sun gear 5 and ring gear 6) are connected electric machines: generator 7 and engine 8, interconnected by the speed controller (converter) 9.

The mechanism 4 has two axially movable links. The first input link (sun gear 5) is able to move towards the carrier 12 having an internal gear ring 11 and engage with it, while maintaining engagement with the satellites 13, but out of engagement with the shaft 14. Output link (carrier 12) connected to the slot with

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million million gear clutch 15 with an interwheel differential 16 and is capable of thereby moving under the action of block 1.7 towards gear 5, withdrawing the satellite 13 from the connection to the ring gear 6 and connecting to the gear 5 with its gear ring 11.

A switching control system 18 is connected to the blocks 10 and 17, which is connected via the speed coincidence control unit 19 to the mechanism 4, to the converter control unit 20, to the control unit 21, to the engine-speed control device 22 and to the signal device 23 on the dashboard of the driver.

Block 19 (Fig. 2) consists of an executive block 24 — a null-organ connected to the comparison element 25, a switching block 26 including contacts 27 and 28 of the command device 21, an adder 29 and four speed sensors of the elements of the mechanism 4. sensor 30 of gear 5, sensor 31 of shaft 14, sensor 32 of carrier 12 and sensor 33 of electric motor 8 or ring gear 6 ..

When the contacts 27 are switched upward, a block 29 and a sensor 32 are connected to the block 25. In the block 29 connected; with sensors 31 and 33, a value proportional to the speed of carrier 12 is calculated, which corresponds to the closed state of mechanism 4. Simultaneously, the sign discriminator input 34 is connected to the output of block 25; the outputs of which are set by the speed controllers 35 and 36 of the rotational speed and the closing contacts of the switch 37 connected to the control unit 20 of the frequency converters 9. The NC contacts of the switch 37 connect the unit 20 to the frequency control system 38 of the converter 9.

Switching a transmission from a single-threaded mechanical state to a two-threaded state is carried out as follows.

The driver from his dashboard by switching in block 21 provides a signal to system 18, which transmits a switching signal to block 17, which disengages mechanism 4, and a signal to turn on switch 37. At this signal, block 20 reverses and accelerates engine 8. Speeds the elements of the mechanism 4 change and at the moment of coincidence of the rotational frequencies of the corresponding elements, the block 19 provides a signal to the system 18, allowing the switching to end. The system 18 provides a signal to the blocks 17 and it closes the mechanism 4

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about the relevant provision. Gear shift 1 ends here.

The coincidence of the rotational speeds of the links of the mechanism 4 results from a change in the rotational speeds of the engines 2 and 8 and the propulsors 3. A check is made of the coincidence of the frequencies by comparing the rotational speed of the carrier 12 with the value calculated in block 29 of its value required for shock-free connection of the elements of the mechanism 4.

During the switching process, the speeds of the elements of the mechanism 4 change. The speed of engine 8 changes under the influence of the signal of block 20, the speed of engine 2 as a result of the disappearance of the load or signal of block 22, and the speed of carrier 12 due to the loss of traction. The coincidence of speeds can occur with any combination of them, and at this moment the mechanism 4 will be closed and the switching will end. .

However, there may be a case where frequency matching does not occur. It can be seen from the speed diagram of FIG. 3 that if, after setting the rotational speeds of the motor 2 and a) 2 of the electric motor 8, the rotational speed of one carrier 12 determined by them (the point at the intersection of the AB line with the co-axis) will be higher than the real one, the coincidence of these rotational speeds without no additional exposure will occur until the vehicle is braked. This effect is generated by connecting the unit 34 to the output of the unit 25, where the signal is proportional to the magnitude and sign of the difference in carrier frequency, i.e. real and calculated in block 29. This signal is fed to the input of block 34, where, depending on the sign, it passes to the first or second output and goes to one of the speed controllers 35 or 36 of the engine 8. The output signal from one of the controllers goes to the input of the control unit 20 of the frequency converter 9 via the contacts of the switch 37. Other contacts of the switch 37 disconnect from the control unit 20 (for the time of the gear shift) an automatic control system 38 that controls the frequency of the motor 8 in the mode traction or braking. Moreover, depending on which of the blocks (35 or 36) the signal comes from, the frequency of the converter 9 increases or decreases. For example, if the actual carrier speed is less than the calculated one, then the current frequency at the input of the motor 8 begins to decrease, while its frequency decreases and, therefore, the calculated carrier speed before being aligned with

real, and at that moment the switch will end. If the actual speed of the carrier is greater than the calculated one, the rotation speed of the engine 8 will increase and the calculated speed of the carrier will increase with it.

 Thus, the power transmission can be switched on the fly in all, without exception, combinations of states and at any values of driving speeds. At the same time, the switching speed will increase, as the latter is carried out actively by adjusting the rotational speed of the engine of the adjustable channel to the speed of the propulsion vehicle, and the tuning is carried out at a pace that is supplanted by special frequency ramps, which guarantees the absence of increased motor currents.

Claims (1)

The claims Double-threaded electromechanical transmission of propulsion equipment on autosw. No. 1794701, with the aim that, in order to expand the functionality by providing automatic shock-free switching on the go when transferring a gear from single-threaded mechanical to two-threaded operation, it is equipped with a switch with contacts, two speed controllers, and discriminator anaka, whose input is connected to the block coincidence of rotational frequencies, and two outputs by means of speed controllers for frequency measurement and switch contacts with a frequency conversion control system. fie. 1 yt