Hydraulic Drive Design - Drawing

Contents

1 Description of operation and properties of hydraulic gears

1.1 Actuation and deactivation of hydraulic motor of pump H drive

1.2 Properties of hydraulic transmissions with indication of elements providing these properties

2 Selection of volumetric hydraulic drive elements

2.1 Capacity on working bodies

2.2 Selection of electric motors and hydraulic pumps

2.3 Selection of hydraulic motor for RC drive

2.4 Selection of hydraulic cylinder for thrust reverser

2.5 Selection of hydraulic oils

2.6 Piping selection and wall thickness calculation

2.7 Selection of distributors

2.8 Selection of safety valves

2.9 Filter Selection

3 Thermal calculation of hydraulic transmission

3.1 Loss of mechanical power in hydraulic transmissions

3.2 Determination of tank parameters

3.3 Heat flow power supplied to the air by the tank and others

transfer elements except AT at Tzhelayemaya = Tu

3.4 Heat flow power supplied to air by cooler

3.5 Determination of heat exchanger area

3.6 Fan capacity

4 Calculation of pressure losses in hydraulic transmissions. Check of kinematic and

power capabilities of the drive

4.1 Calculation of pressure losses

4.1.1 N-M section pressure losses

4.1.2 Pressure losses in section M-Sl.l

4.1.3 Pressure losses in section Sl.l-B

4.2 Torque on motor shaft

4.3 Force on hydraulic cylinder rod at extension

4.4 Gear ratios of actuators of working elements

List of sources used

1 description of operation and properties of hydraulic gears

The hydraulic diagram of the machine is shown in the drawing GP.M311.18.00.00 GZ. The car has two reverse workers of body: PO1 vrashchitelny, PO2 of forward action. Individual electric motors are used as pump drives. The diagram of the machine is double-flow. Hydrotransfers in PO1 and PO2 drives opened. Hydraulic transmissions have distributors with closed center and hydraulic servo control, devices for protection against overloads, oil cleaning and cooling.

1.1 Actuation and deactivation of hydraulic motor of H1 pump drive

Oil is supplied from pump H3 through fine pressure filter F3 to servo control column A2 containing control distributors of servo action P3 and P4 with muscular control. At transfer of the P4 distributor to a working position the operating liquid stream under the influence of pressure through logical ILI1 element will come under a face of the P1 switch which will rise in a position "is closed", the operating stream of oil will come under the left face of the power P1 distributor, it will be transferred to a working position, the power stream of liquid goes on the way: BN1R1MRTS1AT1F1,F2B. Hydraulic motor is on.

If to release a P4 distributor handle, then it will be transferred by a spring to other extreme position and liquid from under a face of the P1 distributor will go for discharge on the way: P1 (left face) of R4F1 F2-B. The spool of the distributor P1 due to the spring will enter the neutral position, closing the pressure line. This will turn off the hydraulic motor. The pressure at the end of selector switch P1 will decrease, it will enter the "open" position. The pressure in the pressure line will increase, the control line of the safety valve of indirect action of the primary protection KP1 will be opened, it begins to operate in overflow mode for unloading the pump H1. The oil flow goes along the path: B- H1- KP1P1TS1AT1F1, F2B.