Design and Experimental Research of a Miniature Digital Hydraulic Valve
Abstract
:1. Introduction
2. Design of the Valve
3. The Mathematical Model of the Valve
3.1. Electromagnetic Subsystem
3.2. Mechanical Subsystem
3.3. Fluid Subsystem
3.4. Chamber Dynamic Pressure Subsystem
3.5. Research on Switching Characteristics
4. Experimental Study on the Micro Digital Valve
4.1. Test System
4.2. Static Characteristic Test of the Miniature Digital Valve
5. Conclusions
- (1)
- The mathematical modeling of the four subsystems of the valve is developed, by which the switching characteristics of the valve are analyzed theoretically. The signal–displacement relation is divided into five stages.
- (2)
- A test system for testing the micro digital valve is designed, and the new micro valve test is carried out. The signal–flow curve is similar to the signal–displacement curve. It can also be divided into five stages to verify the correctness of switch characteristics.
- (3)
- The accuracy of the mathematical model is verified by comparing the signal flow characteristic curves with the simulation results. The flow rate increases with the increase of duty cycle and input voltage.
Author Contributions
Acknowledgments
Conflicts of Interest
References
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Valve Type | Direct Operated Bistable Seat | Pilot Operated Seat | Direct Operated Bistable Spool | - |
Valve Manufacturer | Tampere University of Technology | Tokyo Institute of Technology [17] | Sturman Industries [18] | - |
Nominal Flow @3.5 MPa | 10 L/min | 6 L/min | 32 L/min | - |
Max. Pressure Differential | 21 MPa | 14 MPa | n.a. | - |
Size | 31 mm × 28.2 mm | 50 mm × 150 mm | 110 mm × 35 mm × 35 mm | - |
Disadvantage | Complex Structure | Lower Pressure | Larger Size | - |
Valve Type | Memory Alloy | Piezoelectric | Direct Operated Seat | Direct Operated Seat |
Valve Manufacturer | Oak Ridge National Key Laboratory | Technische Universität Dresden | Tampere University of Technology | Zhejiang University |
Nominal Flow @3.5 MPa | 10 mL/min | n.a. | 1.4 L/min | 2 L/min |
Max. Pressure Differential | 0.5 MPa | n.a. | 21 MPa | 21 MPa |
Size | 30 mm × 3 mm | n.a. | 35 mm × 10 mm | 45 mm × 20 mm |
Disadvantage | Lower Pressure and Smaller Nominal Flow | Higher Voltage | Lower Reliability | Larger Size |
Description | Dimensions and Parameters | Description | Dimensions and Parameters |
---|---|---|---|
Outer Diameter of the Valve | 12 mm | Number of Coil Turns | 300 |
Length of the Valve | 36 mm | Diameter of Coil | 0.18 mm |
Outer Diameter of the Coil | 10 mm | Air Gap Distance | 0.3 mm |
Length of the Coil | 14 mm | Stiffness of the Spring | 12 N/mm |
Resistance | 4.5 Ω | Diameter of Orifice | 0.5 mm |
Voltage | 12 V | - | - |
Part Name | Materials | Part Name | Materials | Part Name | Materials |
---|---|---|---|---|---|
Fastener | 316L | Coil | Copper | Magnetic Ring | DT4 |
Spring | Stainless Steel | Spring Rod | 316L | Valve Seat | Cr12MoV |
Spring Rod Seat | DT4 | Coil Former | 316L | Valve Cone | Cr12MoV |
Valve Shell | DT4 | Valve Spool | DT4 | - | - |
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Zhang, J.; Yang, M.; Xu, B. Design and Experimental Research of a Miniature Digital Hydraulic Valve. Micromachines 2018, 9, 283. https://doi.org/10.3390/mi9060283
Zhang J, Yang M, Xu B. Design and Experimental Research of a Miniature Digital Hydraulic Valve. Micromachines. 2018; 9(6):283. https://doi.org/10.3390/mi9060283
Chicago/Turabian StyleZhang, Junhui, Meisheng Yang, and Bing Xu. 2018. "Design and Experimental Research of a Miniature Digital Hydraulic Valve" Micromachines 9, no. 6: 283. https://doi.org/10.3390/mi9060283