![hydraulic cylinder cross-section diagram](http://0u3.thecmcteam.com/wp-content/uploads/2021/09/how-hydraulic-cylinder-works.jpg)
Hydraulic Cylinder Guide: How to Size a Hydraulic Cylinder
Hydraulic machinery 和 equipment are the workhorse of many manufacturing, 农业, 建设, 林业, 和 mining industries. Knowing how to size a hydraulic cylinder is critical not only for production 和 profit, but also for safety, 效率, 和 equipment performance.
在本文中, we will cover how to size a replacement hydraulic cylinder, along with information on mounting configuration 和 pressure capabilities.
![hydraulic cylinder cross-section diagram](http://0u3.thecmcteam.com/wp-content/uploads/2021/09/how-hydraulic-cylinder-works.jpg)
Step 1: Measure the Piston Diameter
If you’re replacing a hydraulic cylinder with a piston, you’ll need to measure the piston’s diameter. This is also sometimes referred to as the cylinder bore diameter.
To obtain the cylinder bore diameter, simply measure either the inside diameter of the cylinder tube or measure the actual piston diameter if the equipment has already been disassembled. If the equipment is still assembled, you will need to measure the cylinder’s outside diameter 和 then subtract it by the thickness of all tubing walls.
Step 2: Measure the Rod Diameter
Next, to measure the rod diameter, you’ll need a precision micrometer or caliper. With either of these tools, you’ll measure the rod thickness. Be sure to measure twice, because an inaccurate piston rod dimension can cause rod bending 和 machine failure in the future.
Step 3: Measure Stroke, Extension, & 收缩的长度
In this next step, you will take multiple measurements (be sure to have your tape measure h和y). First, you need to measure the full stroke of your cylinder. Stroke is the rod’s full extended length subtracted by its retracted length.
Extended length is the distance between a fixed point on your cylinder 和 its maximum extended position. The retracted length is the distance between a fixed point on your cylinder 和 its full retracted position.
Be sure to separately record the retraction 和 extension lengths, as you will also need this information when ordering a replacement. If your hydraulic cylinder is still functioning well 和 already installed, be sure to read over the appropriate lock-out tag-out requirements.
Step 4: Determine Ends & 越来越多的
When sizing a hydraulic cylinder, you will also want to determine how the hydraulic cylinder is mounted within the unit. You can refer to the original equipment manufacturers (OEM)- provided information or refer to the National Fluid Power Association (NFPA) publication of st和ard mounting types.
The hydraulic cylinder ends 和 mounting can be either flanged, 侧耳安装, 主安装, or trunnion mounted, or they can have tie rod mounts. Most industrial cylinders are flange mounted, while mobile equipment may feature pivot mounting.
Step 5: Determine Pressure
The hydraulic cylinder’s working pressure will vary depending on the type of hydraulic system 和 the equipment application. The maximum pressure released by the hydraulic pump can be found in the manufacturer’s operating manual or measured at the cylinder ports.
The maximum pressure capacity of a light- or medium-duty industrial hydraulic cylinder is typically up to 1,500psi或3,000 PSI. But, higher pressure duties of up to 10,000 PSI are available for heavy-duty equipment.
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