SU1452905A1 - Hydromechanical drive of earth-moving machine - Google Patents

Abstract

This invention relates to hydraulic actuators, earth-moving machines, and m. used in mining, peat, drilling and other machines with an active working body. The goal is to reduce the energy consumption of the earthmoving machine by automatically changing the speed of its movement depending on the load on the working body. The hydromechanical drive includes the hydraulic systems of the stroke and working unit actuators, which contain, respectively, hydraulic motors 3 and 8, hydraulic regulators (GR) 1 and 6, pumps 2 and 7. interconnected with hydraulic lines (HL) high 4 and 9 and low 5 and 10 pressure. The hydromechanical drive also contains a differential mechanism 1 1, the shafts of which are kinematically connected with the shafts of pumps 2 and 7 and the hydraulic motor 8. In this case, GR 1 and 6 communicate directly with CH 9. 9. The setting pressure of GR 1 is greater than the pressure of setting GR 6. During the development of the soil with increasing load on the RO, pressure in CH 9 rises, causing GRs 1 and 6 to simultaneously reduce the flow of pumps 2 and 7 and proportionally decrease the speeds of movement and the working device. With a further increase in the load on the working body, the increase in pressure in GL 9 brings GH 6 to the extreme position. The pump 7 has a zero flow, and the speed of the working member becomes minimal, determined by the kinematics of the mechanism 11. At that, the GR 1 continues to reduce the feed of the pump 2, reducing the speed of movement, and while continuing to increase the load on the RO GR 1, it takes the pump 2 to zero flow. 1 il. p g (L 4; Sd GO with ate

Description

The invention relates to hydraulic actuators for milking machines and can be used (in mining, peat, drilling and other machines with an active working body.

The purpose of the invention is to reduce energy (the expenditure of the earthmoving machine by automatically changing its speed depending on the load on the working body.

; The drawing shows the hydraulic drive of the earthmoving machine.

j The hydromechanical drive contains the hydraulic systems of the stroke and working body drives. The stroke drive hydraulic system includes a hydraulic feed regulator 1, a pump 2 and a hydraulic motor 3, connected between the high and low pressure lines. The hydraulic system of the working ojiraHa drive includes a hydraulic supply controller 6, a pump 7 and a hydraulic motor 8, interconnected by high hydraulic lines 9 and low pressure 10.

The hydromechanical drive also contains a differential mechanism 11, the shafts of which are kinematically connected to the shaft of the p) engine 12, the shafts of the pumps 2 and | 7 and the hydraulic motor 8. The shaft 13 of the differential mechanism 11 is connected to the working body (shown). Regulators 1 and 6 communicate directly with the high-pressure hydroline 9 of the hydraulic drive system of the working driver. The adjustment pressure of regulator 1 is set higher than the adjustment pressure of regulator 6.

: The hydromechanical drive works as follows.

With the transport movement of the earthquake machine, the pressure in the hydroline 9 of the high pressure of the hydraulic system of the working sgan is minimal, and the regulator 1 outputs the pump to the maximum feed mode, with afoM the machine moves with maximum speed. The controller 6 also brings the pump 7 to the highest feed mode, while the speed of the working body is maximum. With the development of the soil, the pressure in the hydroline 9 increases with the load on the working body, which causes the controllers 1 and 6 to simultaneously reduce the flow of the pumps 2 and 7, while proportionally decreasing the movement speed n of the working body of the machine, keeping the ratio between them constant.

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Since the setting pressure of the hydraulic regulator 1 for feeding the pump 2 of the drive stroke hydraulic system is greater than the pressure of the hydraulic regulator 6 for feeding the pump 7 of the hydraulic system for the actuator drive, with a further increase in the load on the working member, the pressure increase in the hydraulic line 9 causes the regulator 6 to reach its extreme position the pump 7 has a zero flow, and the speed of the working member becomes minimal, determined by the kinematics of the differential mechanism 11. The hydraulic regulator 1 continues to reduce the flow of us wasp 2, reducing the speed of movement, and with continued increase in the load on the working element, controller 1 brings the pump 2 to zero flow and the speed of movement of the machine is zero.

Thus, the hydraulic actuator allows you to automatically change the speed of movement and working body of the earthmoving machine, depending on the magnitude of the load on the working equipment, while reducing energy consumption during its operation.

Claims (1)

Invention Formula The hydromechanical drive of the earthmoving machine, which contains the hydraulic systems of the drive units and the working body, each of which includes a hydraulic motor and a pump that has a hydraulic feed regulator, communicate between the high and low pressure lines, and a differential mechanism, whose shafts are kinematically harnesses with the shafts of the pumps and the motor drive the working body, characterized in that, in order to reduce the energy consumption of the earthmoving machine by automatically changing the speed of its movement depending on the load In the working body, hydraulic regulators of the feed pump and drive body hydraulic systems are directly connected to the high pressure hydraulic line of the drive body hydraulic system, and the set pressure of the hydraulic flow control regulator of the hydrostatic drive pump is greater than the set pressure of the hydraulic control unit of the working body drive hydraulic system.