Variable Displacement Piston Pump – A Complete Guide for Selecting The Correct Solution

Hydraulic systems rely on proper design, efficient production, and effective operation using variable displacement piston pumps. To select the correct pump for your application, you’ll want to evaluate how much money you save each time you use the pump versus how well it completes your desired task. This article provides an overview of variable displacement piston pumps, criteria to consider when selecting a pump, and ways to improve your application’s performance using this technology.

What are Variable Displacement Piston Pumps?

Variable displacement piston pumps offer users the ability to change both flow rate and output pressure through the manipulation of the stroke length of the pistons. Because the stroke length can be changed frequently, these pumps will provide greater efficiency and versatility than fixed displacement pumps. Variable displacement piston pumps are critical for industries such as construction and agriculture, automotive assembly, and aerospace because they enable optimal performance with lower energy usage.

Benefits of Variable Displacement Piston Pumps

Variable displacement piston pumps have many advantages. Understanding these benefits can help users make informed buying decisions. Examples of benefits for using variable displacement piston pumps include:

• Energy saving capabilities – This pump is able to respond to the demand for hydraulic fluid (or pressure), thereby eliminating waste of energy.
• Precision Control – These pumps provide precise control over flow and pressure, therefore making them very useful in applications requiring a significant amount of accuracy.
• Wide Range of Applications – These pumps can be used for a variety of applications (ranging from large industrial systems to small machines that require variable output).
• Less Heat Generation – The reduced use of energy leads to less heat generated, therefore increasing the lifespan of component parts.

Common Industries and Applications

Variable displacement piston pumps are very versatile and high-performing products that are used across several industries:

• Manufacturing – Used to power operations of CNC machines, Injection molding machines and any other type of manufacturing equipment that requires a high level of performance and precision.
• Construction – Used in heavy construction equipment like backhoes, excavators, loaders and cranes.
• Agriculture – Used in agricultural equipment like tractors, harvesters and other farming machinery for enhanced efficiency.
• Aerospace – Used in hydraulic systems that are critical to the operation of aircraft, which helps to ensure safety and reliability of these systems in various operating conditions.

Factors to Consider When Selecting a Variable Displacement Piston Pump

Many factors must be considered when selecting the correct pump for your application.

1. Identify Your System Needs.

Find out your system’s hydraulic requirements (flow rate, pressure range and operating conditions). Over-specifing a pump can be a waste of energy, while under-specifying a pump will reduce the overall performance of the system.

2. Identify the Quality and Reputation of the Manufacturer.

Reliability is a priority for many manufacturers of variable displacement piston pumps. Manufacturers such as Rexroth, Parker Hannifin, Kawasaki and Danfoss manufacture reliable variable displacement piston pumps. Buying from a well-known brand means getting better quality performance and durability as well as after sales support.

3. Assess Energy Efficiency

Select pumps that are built for energy savings as this will help reduce on-going operational costs for many years. Load sensing technologies can help improve both pump performance and energy usage.

4. Availability of Maintenance and Spare Parts

Models designed to increase convenience with regard to servicing and obtaining replacement parts will minimize down-time and keep your operations running smoothly.

5. Budget Consideration and Total Cost of Ownership (TCO)

The close relationship between initial cost and overall cost (TCO), which includes maintenance cost, energy savings and life span, is crucial to making good buying decisions. A slight increase in initial cost can amount to large savings in the future.

How to Maintain Your Variable Displacement Piston Pump

Even the best equipment requires regular care, and thus here are some of the best practices used to maintain your pump:

• Inspection on a Regular Basis: Watch for leaks, odd noises and general wear and tear
• Clean Hydraulic Fluid: Keeping contaminants out of the hydraulic fluid is essential to maintaining the health of the pump’s internal parts. Use only good quality fluids and change periodically.
• Maintain Proper Operating Conditions: Always ensure your system is operating within the recommended ranges for pressure and temperature.
• Follow the Manufacturer’s Instructions: Always follow the operating and service instructions supplied by the pump’s manufacturer.

Where to Buy Variable Displacement Piston Pumps?

There are many tools available to find good suppliers of pumps, including manufacturers of such pumps near you or through the online engineering market or authorized distributors, such as Bosch Rexroth, Parker Hannifin, Eaton, Caterpillar, etc.

Conclusion: Making Your Investment Go Further

A Variable Displacement Piston Pump represents an important component in the achievement of an efficient and productive hydraulic system. Understanding your operational needs and selecting the correct specifications for your pumps will not only increase productivity but will also reduce overall energy usage and maintenance over time. Working with a reputable company to acquire the necessary hydraulic system will enable you to achieve the benefits offered by variable displacement piston pumps. Use caution in your decision to purchase, and you will enjoy many benefits in both performance and dependability.

If you have any questions on how to select a pump for your application or would like further information on suppliers of hydraulic systems, please don’t hesitate to contact someone with industry experience or to work with suppliers who can provide you with specific recommendations related to your hydraulic system.