Hydraulic pumps supply the flow and pressure that drives hydraulic equipment. Selecting the proper pump for an application requires matching key specs like pressure rating and horsepower to your operating requirements. Pumps with too low of a pressure rating can fail or perform poorly, while oversized pumps waste energy and add unnecessary costs.
En este artículo, we’ll look at potencia de bomba hidráulica pressure ratings and power in more detail, and how to intelligently match these to your hydraulic system components and duties.
Pressure Ratings: Don’t Undersize Your Pump
A hydraulic pump’s pressure rating indicates the maximum working pressure it can reliably deliver. Exceeding this rating risks damage to the pump and overall system. Hydraulic equipment like cylinders and motors require certain pressures to operate as designed. Choosing a pump with too low of a rating can lead to weak performance or even mechanical failure.
Para muchas aplicaciones industriales, 3,000 psi is a common pressure requirement. Pumps like gear models from Eaton or piston types from Parker can deliver reliable hydraulic flows at this pressure level. Going above 3,000 psi may call for more specialized high pressure pumps.
It’s important to factor in proper safety margins on top of equipment pressure needs. A pump sized too closely to nominal system pressures will struggle, especially as components wear over time. Look for a pump rated comfortably above the maximum expected operating pressure. Adding a relief valve is also wise to prevent potential pressure spikes.
Matching Pressure Rating To Equipment Needs
The pressure rating needed depends on the hydraulic components in your system. Por ejemplo, a hydraulic press running large bore cylinders may only require 1,500 psi. But a production machine with fine-positioning actuators may need 4,000+ psi for proper operation.
Be sure to get pressure specs for all components, including worst-case scenarios under heavy loads. Simulations and models can help estimate peaks. Remember that pressures can spike well above normal levels when elements like control valves open and close suddenly. Select a pump rating that still has margin at potential peak conditions.
Power And Displacement Size Matters
The horsepower rating indicates the hydraulic power a pump can supply. Desplazamiento, often given in cc/rev or in3/rev, determines the flow rate it can deliver. Both must be sized correctly for the pump to perform well.
Horsepower needs depend on factors like cylinder bore sizes, hydraulic motor loads, and required actuation speeds. A pump with insufficient horsepower will struggle to build pressure quickly. Oversizing horsepower provides a cushion for demanding operations.
Displacement affects how quickly actuators move, with higher displacement enabling faster cylinder speeds and response times. Make sure the pump can supply sufficient flow for all actuators, even when operating simultaneously. Performance will suffer if flow rate is undersized.
Keeping The Right Balance
Properly sizing both pressure rating and power/flow for the pump ensures good performance across operating conditions. Finding the optimal balance avoids issues like:
- Low pressure rating = system pressures can’t be reached
- Small displacement = slow actuator response
- Underpowered = pressure builds slowly
- Oversized = unnecessary cost and energy usage
Take the time to make detailed calculations and simulations to right-size your pump selection. This upfront effort helps ensure your hydraulic system operates reliably and efficiently.