SU1395530A1 - Hydrostatic actuator of trailer - Google Patents

Abstract

The invention relates to semi-trailer earthmoving machines. The purpose of the invention is to increase efficiency by increasing the pulling force. The invention allows to provide an additional {1 pulling force to the traction motor hydraulic wheels over the entire speed range by using the rigid kinematic coupling of two hydraulic pumps 1, 2 of constant performance with two hydraulic gates, the rigid kinematic coupling of the adjustable hydraulic pump 9 and an engine t gacha. And a combination of two hydraulic motors 3, 4 with hydraulic motor wheels using controlled clutches. 1 il.

Description

SL

about

F

00

 ate

ate

WITH

The invention relates to semi-trailer earthmoving machines, in which the frame of the working body rests on the front end with the front end and the rear end on the additional support (track or wheel).

The purpose of the invention is to increase the efficiency by increasing the pulling force.

The drawing shows the hydraulic circuit of the hydrostatic drive of the trailer, I The hydraulic drive of the trailer contains reversible pumps 1 and 2 of the right and | flange, kinematically rigidly connected with the propulsion engines and connected with hydraulic motors 3 and 4 the corresponding mshtor-wheels with b-8 hydrolines.

: An adjustable pump 9 -c hydraulic proportional regulator is connected to a three-position four- {code directional distributor 10. Distributor 10 is connected in pairs through one outlet through hydraulic lines 11 and 12 to hydraulic lines 5 and 6, and the other through hydraulic lines 13 and 14 seconds. hydroli Yi mi 7 and 8. Drain outlet of distribution unit - connected through pressure valve 15 to tank 16.

In the neutral position, the distribution of the gel 10 is all four of its soy supply, which are dinene to each other. With the pressure of the hydroline of the pump 9 is connected safety valve 17.

Hydrostatic trailer drive works as follows.

The main reversible pumps 1 and 2, mounted on the side gearboxes of the right and left tracks, supply the working fluid, depending on the direction of movement of the ho 5 and 6 or 7 and 8, to the respective hydraulic motors 3 and 4 wheel motors. By the opposite hydrolines, the liquid enters the suction nozzles of pumps 1 and 2. When the driving speed changes, the rotation speed of the hydraulic pumps, hydraulic motors and hydraulic motor wheels changes accordingly.

The kinematics of the onboard gearboxes and the motor-wheel gearboxes are designed in such a way that the speeds of the propulsion unit, such as the track chain and the hydraulic motor-wheels, are equal. In this calculation, the volume loss is not taken into account. Since the volume losses actually exist and depend on p yes

50

five

Q

0

five

five

0

five

random factors (design of hydraulic units, pressure, viscosity of the working fluid, rotational frequency, etc.), to replenish them and provide guaranteed traction developed by the motor-wheels with simultaneous synchronization by the propulsion unit, the supplementary pump 9. The latter, through the distributor guide 10 and the hydraulic lines 11 and 12 (or 13 and 14, depending on the direction of movement), supply the working fluid to the hydraulic lines of the main pumps, which are pressurized at the chosen direction of movement. At the same time, the hydraulic regulator of the proportional pump provides an increase in the feed and speed of 1 hydraulic motor-wheels when they lag or, on the contrary, a decrease in the speed of the hydraulic motor-wheels when they want to outrun the load.

The excess working fluid caused by overflows from pressure lines from hydrolines, in hydrolines, is drainage in the chosen direction of movement, is removed into the tank through pressure valve 15. In the neutral position of the distributor 10, the pump 9 is almost completely pumped out through the pressure valve 15, providing only replenishment of leaks in the hydraulic system, rotation of the hydraulic motors at a pressure corresponding to the low pressure setting of the pressure valve, fi, thus free running out of the wheel motor.

P

Claims (1)

Invention Formula Hydrostatic drive of the trailer, containing an additional and main pumps placed on the tractor, with the main pump communicating with hydraulic lines with hydraulic motors kinematically connected with the motor-wheels of the trailer, the control device including the distributor communicating with the main hydraulic pump main, safety a valve connected to the latter and communicated by hydroline with a hydraulic system, characterized in that, in order to increase s (M) efficiency by increasing traction, it is equipped with reversible gi ronasosamiposto constant performance with pressure and discharge line E, kinematichrgki coupled with dd gzhitel E towing vehicle, hydraulically controllable clutches arranged in the kinematic connection of hydraulic motors with motor wheels of the trailer, the pressure valve in the hydraulic line informing safety valve gidrobakrn, wherein The main pump is made adjustable and equipped with a pressure regulator, the main and additional pumps are kinematically connected to the engine, and the reversible hydraulic pumps are permanently proiavoditelnosti communicated constant pressure and return hydraulic lines to hydraulic motors corresponding bead and interconnected, three-position four-way valve is formed, wherein the first line the distributor communicates with the pressure line of the main hydraulic pump, the second line is connected with the hydroline between the safety valve and the pressure valve, the third and fourth lines are respectively with the pressure and drain hydrolines of the reversible hydraulic pumps of constant performance, while in the first position of the first line is connected to the third line , the second - from the fourth, in the second position, the first, second, third and fourth lines communicate with each other, in the third position the first line is communicated with the fourth line, the second line - with t etey line, wherein the additional pump is communicated with the hydraulic clutch control.