Hydraulic cylinder It is directly related to the machine and the mechanism on the machine. For different mechanisms, the specific purpose and working performance of the hydraulic cylinder are also different. Therefore, before design, it is necessary to sort out the design basis.
(1) The main purpose of designing the hydraulic cylinder is to understand and master the use and working requirements of the hydraulic cylinder on the machine and meet the action requirements and use of the mechanism. For example, the hydraulic cylinder used for hydraulic dump truck is used to lift the dump into an inclined state, so that the loaded materials can be unloaded automatically, and its return can be completed under the gravity of the dump. In this case, the hydraulic cylinder can be designed as a single (piston) rod single acting hydraulic cylinder or a plunger cylinder. Another example is the hydraulic cylinder of the truck crane. In order to adapt to the conversion of different lifting heights and workplaces, the hydraulic cylinder for the boom must be a telescopic multi-stage hydraulic cylinder. The specific structure can be a single acting plunger type multi-stage hydraulic cylinder, a piston type multi-stage hydraulic cylinder, or a final piston type multi-stage hydraulic cylinder, depending on the specific situation.
(2) Understand the working environment conditions of the hydraulic cylinder. The structure and design parameters of the hydraulic cylinder are different due to different working environment conditions. For example, the vertical (support) cylinder on the hydraulic support used in the coal mining face has poor working conditions, large dust, and large change of support (working) pressure (large load change). The vertical (support) cylinder is required to be safe and reliable, and no leakage is allowed. In view of this working condition, dust prevention measures shall be taken into consideration when designing. The strength and stability of cylinder block and plunger shall be reliable, the safety factor shall be larger, and the sealing performance shall be better. Like the hydraulic cylinder used for precision external (internal) grinder, the working environment is relatively clean, the load is stable and small, and the structure and design parameters should adapt to its working conditions.
(3) Understand the external load, mainly referring to the external load's mass, geometric shape, space volume, motion track, friction resistance and connection form of connection parts. For example, for hydraulic dump trucks, the external load of the hydraulic cylinder is the dump bucket (carriage) and the loaded goods. When the dump bucket rises and tilts, the axis of the hydraulic cylinder will swing, which requires that the head of the piston rod and the dump bucket be connected by ear ring or pin shaft, and the installation form of the hydraulic cylinder base and the body should also be ear ring or ear shaft.
(4) Understanding Oil cylinder manufacturer The movement form and installation constraints of the hydraulic cylinder include knowing the maximum stroke, movement speed or time of the hydraulic cylinder, the allowable overall dimensions of the installation space and the movement form of the hydraulic cylinder, such as the fixed or swinging axis of the hydraulic cylinder, reciprocating linear movement or reciprocating swing, continuous or intermittent periodic movement, cylinder movement or piston rod movement. The starting point of design consideration is also different for hydraulic cylinders with force as the main requirement and hydraulic cylinders with movement speed or time as the main requirement.
(5) Understanding Hydraulic system The design of the hydraulic cylinder is a part of the hydraulic system. When designing the hydraulic cylinder of a known hydraulic system, it is necessary to know the working pressure and flow of the hydraulic pump, the diameter and layout of the pipeline, the installation and control of various hydraulic valves, etc.
(6) Understand relevant national standards, technical regulations and other reference materials. Learn from existing Oil cylinder manufacturer The design of hydraulic cylinder is very necessary.
