Sách giáo trình về thủy lực tỷ lệ

Trường đại học

Festo Didactic GmbH & Co.

Chuyên ngành

Thủy lực

Người đăng

Ẩn danh

Thể loại

sách giáo trình

2002

114
1
0

Phí lưu trữ

35 Point

Mục lục chi tiết

1. Introduction to proportional hydraulics

1.1. Hydraulic feed drive with manual control

1.2. Hydraulic feed drive with electrical control and switching valves

1.3. Hydraulic feed unit with electrical control and proportional valves

1.4. Signal flow and components of proportional hydraulics

1.5. Advantages of proportional hydraulics

2. Proportional valves: Design and mode of operation

2.1. Design and mode of operation of a proportional solenoid

2.2. Design and mode of operation of proportional pressure valves

2.3. Design and mode of operation of proportional flow restrictors and directional control valves

2.4. Design and mode of operation of proportional flow control valves

2.5. Proportional valve designs: Overview

3. Proportional valves: Characteristic curves and parameters

3.1. Characteristic curve representation

3.2. Hysteresis, inversion range and response threshold

3.3. Characteristic curves of pressure valves

3.4. Characteristic curves of flow restrictors and directional control valves

3.5. Parameters of valve dynamics

3.6. Application limits of proportional valves

4. Amplifier and setpoint value specification

4.1. Design and mode of operation of an amplifier

4.2. Setting an amplifier

4.3. Setpoint value specification

5. Switching examples with proportional valves

5.4. Energy saving measures

6. Calculation of motion characteristics of hydraulic cylinder drives

6.1. Flow calculation for proportional directional control valves

6.2. Velocity calculation for an equal area cylinder drive disregarding load and frictional forces

6.3. Velocity calculation for an unequal area cylinder drive disregarding load and frictional forces

6.4. Velocity calculation for an equal area cylinder drive taking into account load and frictional forces

6.5. Velocity calculation for an unequal area cylinder drive taking into account load and frictional forces

6.6. Effect of maximum piston force on the acceleration and delay process

6.7. Effect of natural frequency on the acceleration and delay process

6.8. Calculation of motion duration