Industry News

With the continuous advancement of technology, Isuzu rear-loading compression garbage trucks have undergone great reforms, gradually transforming from the previous manual control to the current automated control. The wide application of pressure relays and electromagnetic steering valves in hydraulic systems allows the corresponding electrical systems to form an automated control mechanism, providing support for the automated control operations of Isuzu garbage trucks.

Overview of electrical design principles of Isuzu garbage truck control system

1. Process connection and limit protection
A limit switch was added to the electrical design of the garbage truck control system, and its position is at the action position of the skateboard and scraper. The limit switch installed here is mainly to detect whether the circuit is connected during the working stage, and to select the output signal through the controllable programmer to ensure that the garbage truck stops changing actions when the scraper and skateboard collide with other parts. , thereby reducing noise and avoiding serious mechanical damage caused by large-movement collisions.

2.Control method
The control methods of garbage trucks in the electrical control system mainly include manual and automatic methods. Among them, manual control is basically when the filling mechanism is stuck by a large object or other unexpected situations occur, and manual switch button operation is often selected. Manual operation can reversely operate the scraper to make it move in the opposite direction, thereby freeing the filling mechanism from stuck objects. Normally, garbage trucks are operated automatically. Only when an unexpected situation occurs or the tail box is too full of garbage, the garbage is loaded into the garbage truck through short cycle operation to prevent the garbage from being pushed out.

Main hydraulic control systems and component selection

1.Hydraulic steering valve
When selecting a steering valve, sufficient research must be conducted, and then a suitable hydraulic steering valve must be selected based on the actual production conditions. Operators often undertake high-intensity labor during operations and have high requirements for system reliability. Two control modes, manual and automatic, are designed for direction control. When selecting a hydraulic steering valve, choose a combined form of steering valve. The valve core is equipped with a manual control machine operating handle, and is also equipped with a solenoid valve and a small cylinder. The cylinder is then controlled by controlling the solenoid valve, and the cylinder pushes the valve core.

2. Fuel tank
The oil tank is mainly used for oil storage, and then ensures that the hydraulic system can fully operate the oil, and also has a corresponding heat dissipation effect. The oil tank also has the function of precipitating pollutants that have penetrated into the oil, thereby ensuring that the oil in the entire system is clean. The fuel tank must have sufficient heat dissipation area and volume. When selecting the volume of the fuel tank, it should be selected according to the low-pressure system, medium-high-pressure system, and medium-pressure system. The low-pressure system is mainly P6.3 MPa, and the selected volume is V=(7~12)Qp. Qp in the formula represents the hydraulic pump flow rate.

3.Actuator
When selecting an actuator, its hydraulic principle must be analyzed, and then its action must be analyzed. The overall design requirements of the actuator must meet the reciprocating motion requirements. Generally, compression-type garbage trucks are relatively large, and the installation dimensions and working strokes vary greatly. They are composed of push plate cylinders, single-stage cylinders, and three-stage cylinders. It is important to select the oil cylinder after external pressure. If the system pressure is low, the actuator is required to have a large capacity, heavy mass or large size. If the pressure is relatively large, the required actuator precision will be higher. At this time, the system must also be correspondingly improved during use and maintenance, further reducing the volumetric efficiency. In actual work, when selecting cylinder actuators, the forces under actual working conditions should be analyzed.