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Hollow plunger hydraulic cylinder: The hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy and performs linear reciprocating motion (or pendulum motion). Its structure is simple and reliable. It is used to realize reciprocating motion, can eliminate the deceleration device, and has no transmission gap, and the motion is stable. Therefore, it has been widely used in various mechanical hydraulic systems. The output force of the hydraulic cylinder is proportional to the effective area of the live plug and the pressure difference between its two sides; the hydraulic cylinder is basically composed of a cylinder tube and a cylinder head, a live plug and a live plug rod, a sealing device, a buffer device and an exhaust device. The buffer device and the exhaust device depend on the specific application, and other devices are indispensable. The development trend of hydraulic cylinders: 1. High pressure and miniaturization. High pressure is an effective way to reduce the radial size and weight of the hydraulic cylinder, and to reduce the volume of the entire hydraulic device. 2. New material, lightweight. With the high pressure and miniaturization, the test of the use environment of the hydraulic cylinder, new materials and light weight have become one of the solutions. 3. The new mechanism is compounded. In order to adapt to the expansion of the application range of hydraulic cylinders, various hydraulic cylinders with novel structures have appeared continuously, such as self-control hydraulic cylinders, self-locking hydraulic cylinders, steel cable hydraulic cylinders, creeping hydraulic cylinders and composite hydraulic cylinders. 4. High performance and multiple varieties. 5. Energy saving and corrosion resistance. According to the structure types of commonly used hydraulic cylinders, they can be divided into four types: live plug type, plunger type, telescopic type, and swing type.
Plunger hydraulic cylinder:
1. It is a single-acting hydraulic cylinder, which can only be moved in one direction by hydraulic pressure. The return stroke of the plunger depends on other external forces or the weight of the plunger. It can only be transported in an upward-moving hydraulic cylinder. The weight return of the special moving part itself;
2. The plunger is only supported by the cylinder liner and not in contact with the cylinder liner, so that the cylinder liner is very easy to process, so it is suitable for long-stroke hydraulic cylinders, such as rail grinders, large broaching machines, and planers;
3. The plunger is always under pressure during work, so it must have sufficient rigidity;
4. The weight of the plunger is often large, and it is easy to weigh and sag when placed horizontally, causing unilateral wear of the seal and the guide, so its vertical practicality is more advantageous, and sometimes it can be made hollow. Hollow plunger hydraulic oil cylinder relates to a hydraulic oil cylinder. When the cylinder is installed horizontally or obliquely, its bending stress is small, and the plunger, sealing ring and guide sleeve wear small, which is beneficial to prolong the service life, reduce the maintenance amount and improve the operation rate. . The cylinder body is specially equipped with a guide sleeve, which is equipped with a hollow plunger, an exhaust valve on the rear wall of the cylinder body, an oil inlet at the rear end of the cylinder body, a sealing ring between the plunger and the cylinder body, the gland and the cylinder The front end of the body is fixedly connected, the dust ring is placed between the plunger rod head and the gland, the cylinder body support is connected to the cylinder body, the plunger is hollow, and an opening at the rear end of the plunger communicates with the special inner cavity of the cylinder body.