The hydraulic oil is used as the operating medium to convey the operation according to the different sealed volumes and the driving force according to the working pressure inside the hydraulic oil.
1. Part of driving force - converts the mechanical kinetic energy of transmission device into the working pressure energy (hydraulic energy) of hydraulic oil, such as hydraulic pump, Hydraulic winch 。
2 Implement part 1: convert the working pressure energy of hydraulic oil delivered by hydraulic pump into the mechanical kinetic energy driving the operating mechanism. For example: hydraulic cylinder Oil motor 。
3. Operation part I is used to control and regulate the working pressure, flow and flow direction of hydraulic oil, such as pressure regulating valve, flow regulating valve and directional pressure regulating valve.
4. Auxiliary part - connect the previous three parts together to form a system with functions of oil storage, filtration system, fine quantity and sealing. For example: pipelines and connectors, oil tanks, filters, accumulators, seals, control instruments, etc.
The working pressure exerted at any point on a certain volume of liquid can be transmitted to various directions in the same size. This means that when many hydraulic cylinders are used, each hydraulic cylinder will pull or push at its own speed, and the key to this speed is the working pressure required for movement load. Under the same range of bearing capacity of hydraulic cylinders, The hydraulic oil cylinder with heavy load will move first, and the hydraulic oil cylinder with heavy load will eventually move. In order to make the hydraulic oil cylinder operate synchronously, so that the load is jacked up at the same speed at any point, pressure regulating valve or synchronous jacking system elements must be used in the system
(1) Hydraulic transmission device The basic working principle of CNC grinder is shown in the figure Hydraulic transmission The working principle of the device is that the hydraulic oil pump 3 is driven by the motor and absorbs oil from the oil tank 1, then transmits the hydraulic oil with pressure energy to the pipeline. The hydraulic oil flows through the throttle valve 4 and the pipeline to the hydraulic reversing valve 6. The valve core of the hydraulic reversing valve 6 has different operating parts (there are three operating parts in the figure), so the channel conditions are different. When the valve core is in the middle, the valve P A、B. T is interconnected. The oil path to the hydraulic cylinder is blocked, and the hydraulic cylinder cannot connect to the pressure oil, so the console stops and cannot move; If the valve core is pushed to the right (the right operating part), the valve Р And A, B and T Р The hydraulic reversing valve 6 is injected into the port A, and the left chamber of the hydraulic cylinder 8 is injected through the port A. The piston 9 is pushed by the pressure oil in the left chamber of the hydraulic cylinder to move the console to the right; The hydraulic oil in the right chamber of the hydraulic cylinder is injected into the hydraulic reversing valve 6 through port b of the hydraulic reversing valve 6, and then flows to the oil tank 1 through the oil return port T; If the valve core of hydraulic reversing valve 6 is pushed to the left (the left running part), the piston is pushed to the operating platform and moved to the left; As a result, the operating position of hydraulic reversing valve 6 is different, and the channel of pressure oil can be constantly changed, so that the hydraulic cylinder can keep reversing, so as to achieve the repeated movement required by the console.
According to different production and processing requirements, the moving speed of the console can be adjusted through throttle valve 4, and the flow through the throttle valve can be adjusted by changing the opening size of the throttle valve to adjust the moving speed of the console.
When the operating platform is moving, considering the different working conditions, the friction resistance to be removed is also different. The different friction resistance is all removed by the pressure energy of the hydraulic oil pump output hydraulic oil. The pressure of the system can be adjusted through throttle valve 5. When the oil pressure in the system rises above the set pressure of the throttle valve, the steel ball on the throttle valve is jacked open, and the hydraulic oil is discharged back to the oil tank through the throttle valve. At this time, the oil pressure will not rise again, and the constant value will be maintained. In order to maintain the cleanness of the hydraulic oil, a filtering device is installed to remove the dirt and sundries in the hydraulic oil, so that the system can operate normally.
