밸브 및 오리피스
등온 유체 도메인에서 오리피스, 밸브, 밸브 액추에이터, 그리고 밸브 및 오리피스와 관련된 힘을 모델링하려면 다음 블록을 사용하십시오.
Simscape 블록
도움말 항목
- Modeling Directional Valves in Simscape Fluids
Selecting and parameterizing directional control valves in Simscape™ Fluids™.
- Building a Custom Valve
Model a custom valve with orifice blocks.
- Parameterize an M-Way N-Position Valve
Use a data sheet to parameterize an M-Way N-Position Valve (IL).
추천 예제
Diesel Engine In-Line Injection System
An in-line multi-element diesel injection system. It consists of a cam shaft, a lift pump, four in-line injection pumps, and four injectors.
Priority Valve Controlling Two Hydraulic Motors
A pressure-compensated 3-way flow control valve. This valve maintains constant flow rate through the main hydraulic motor, which is connected to the pressure-compensated outlet of the flow control valve. It acts as a priority valve, diverting the excess flow to the auxiliary hydraulic motor if the main hydraulic motor receives enough fluid to maintain a preset angular velocity. The auxiliary motor is shut off completely if there is insufficient flow to power the main hydraulic motor.
Hydraulic Flow Rectifier Circuit
A flow rectifier circuit with four check valves and a flow control valve. It is used to allow a single flow control valve to control fluid flow in both directions. Similar to a Graetz circuit implemented with diodes, the check valves are arranged in such a way that flow always passes through the flow control valve in the same direction. In the Orifices subsystem, there are two more check valves that are used to select the orifice that the flow passes through depending on the flow direction.
4-Way 3-Position Valve Parameterization
Parameterize and test a 4-way 3-position valve with a test harness. A plotting script compares the output flow between the block and data to verify the test harness. This example also contains a live script to explain the parameterization and the test harness workflow in detail.
Lubrication System
A simplified version of a lubrication system fed with the centrifugal pump. The system consists of five major units: Pump Unit, Scavenge Unit, Heat Exchanger Manifold, Nozzle Manifold, and Control Unit. Both the pump and the scavenge unit are built around the centrifugal pump. The Scavenge Unit collects fluid discharged by nozzles and pumps it back into the reservoir of the Pump Unit. The Control Unit generates commands to bypass either the heat exchanger, represented as a local resistance, or the nozzles block. In a real system, these commands are generated by temperature sensors installed in lubrication cavities.
Hydrostatic CVT
Model, parameterize, and test a hydrostatic continuously variable transmission (CVT) with a swash angle shift command. When you run the plot function, it generates a comparison plot between the engine and the achieved rotational velocity in the hydraulic axial piston motor with respect to the time. Construction and agricultural equipment manufacturers use these transmissions.
Power-Assisted Steering Mechanism
A simplified version of a power-assisted steering mechanism. The hydraulic actuation system includes a double-acting hydraulic cylinder, 4-way valve, fixed-displacement pump, and a pressure-relief valve. The steering rack acts against a load modeled by a spring and damper.
Pressure Control Servo Valve
Model, parameterize, and test a pressure control servo valve with a closed loop control. This example also generates a comparison plot between the commanded and the achieved pressure in the actuator with respect to the time. This valve provides a precise and fast control of the pressure in the actuator with a very small electrical signal to the torque motor. These valves are used in the aerospace industry and the automotive industry for the safety critical applications.
Pressure Intensifier
Model, parameterize, and test a pressure intensifier.
Hydraulic Clutch System
Model, parameterize, and test a hydraulic clutch system. The model is used to generate the plot of the engine and the transmission system speeds during a declutching and clutch re-engaging scenario.
Pressure Control Solenoid
Model, parameterize, and test a pressure control solenoid valve. This example also generates a plot of the relationship between applied solenoid force and the resulting actuator port pressure.
Hydraulic Actuator with Dual Counterbalance Valves
An actuator controlled by a 4-way directional valve and loaded with an overriding load, requiring the use of counterbalance valves to prevent the load from creeping when the directional valve is in the neutral position. In the neutral position, the directional valve connects ports A and B to the reservoir while blocking the pressure port P. The counterbalance valves block flow from returning to the reservoir, thus holding the actuator in place.
Hydraulic Flow Rectifier Circuit
A flow rectifier circuit with four check valves and a flow control valve. It is used to allow a single flow control valve to control fluid flow in both directions. Similar to a Graetz circuit implemented with diodes, the check valves are arranged in such a way that flow always passes through the flow control valve in the same direction. In the Orifices subsystem, there are two more check valves that are used to select the orifice that the flow passes through depending on the flow direction.
Front-Loader Actuation System
A simple actuation system that has a lift and tilt cylinder. Each cylinder is controlled by an open center, 6-way, 3-position directional valve. The valves are connected in series through their unloading branch such that the system pump unloads when both spool displacements are in neutral position. If either tilt or lift command applies, the unloading path closes.
Hydraulic Axial-Piston Pump with Load-Sensing and Pressure-Limiting Control
A test rig designed to investigate the interaction between an axial-piston pump and a typical control unit simultaneously performing the load-sensing and pressure-limiting functions. To increase the fidelity of the simulation, this example uses a detailed model of the pump that accounts for the interaction between the pistons, swash plate, and valve plate.
Drill-Ream Actuator
An actuator that drives a machine tool working unit performing a sequence of three technological operations: coarse drilling, fine drilling, and reaming. One of three pressure-compensated flow control valves controls the actuator speed as metering out return flow from the cylinder. Directional valves that are activated by a control unit perform the selection of an appropriate flow control.
Pressure Reducing Valve in Punching Operation
Models a hydraulic system with a direct operated, pressure reducing valve. This system helps to limit and maintain pressure in a hydraulic punching machine. Pressure reducing valves are common in hydraulic pressing, drilling, and stamping applications.
Servo Valve with Custom Fidelity
Compares the mechanical performance of various spool actuation configurations and model fidelity levels for a hydraulic 4-way 3-position directional valve. The directional valve controls a simple double-acting cylinder in a closed-loop application. This example allows you to choose among four different spool actuation designs:
ABS Open Loop Test Bench
A simple way of modeling of the anti-lock braking system (ABS) and using it with the manual braking components. The model simulates for the open loop ABS and shows the response of the pressures achieved in the caliper disc brakes. This model can be utilized in sizing of the release valve, apply valve and accumulator for the hydraulic control unit of the ABS.
Anti-Lock Braking System (ABS)
A simple way of modeling an ABS braking system. The model shows the velocity profile responses achieved for the vehicle CG and the wheels.
