Feb 02, 2024Leave a message

What Is The Performance Curve Of A Gear Pump?

A gear pump performance curve is a graph showing the relationship between pressure and flow in a pump. Pressure is usually measured in pounds per square inch or pounds per square foot, while flow is measured in gallons per minute or cubic feet per minute.
The performance curve of a gear pump usually has a shape similar to a capital "N". When the pump runs at higher speeds, the flow rate increases but the pressure remains relatively constant. When the pump runs at a lower speed, the pressure increases but the flow rate decreases.
The performance curve of a gear pump can be used to determine the optimal operating point of the pump.

Performance curves can also be used to troubleshoot pump problems. If the pump is not delivering sufficient pressure or flow, performance curves can be used to determine the cause of the problem. For example, if a pump is running at too low a speed, it may not be able to provide adequate pressure or flow. If the pump is run at too high a speed, it may become overtaxed and cause damage to itself.

 

The performance curves of gear pumps mainly include flow-head curve, flow-power curve and flow-efficiency curve. These curves describe the performance of a gear pump at different flow rates.
1. The flow-head curve is a curve describing the relationship between the head and flow of a gear pump. It usually shows a "hump" shape, that is, the head is higher in the small flow area, gradually decreases as the flow rate increases, and rises again in the large flow area.
2. The flow-power curve is a curve describing the relationship between the shaft power and flow rate of the gear pump. As the flow rate increases, the shaft power of the gear pump increases accordingly.
3. The flow-efficiency curve is a curve describing the relationship between the efficiency and flow rate of a gear pump. Within a certain flow range, the efficiency of the gear pump will increase as the flow rate increases, but after exceeding a certain flow rate, the efficiency will gradually decrease.
These performance curves can help users understand the performance of gear pumps under different working conditions so that they can better select and use gear pumps.
Learn more about hydraulic pump parameters and performance:
**Hydraulic gear pump
**Piston pump
**Hydraulic vane pump
**Motor

The following shows the fixed displacement internal gear pump PGH of Rexroth gear pump:

PGH gear pump has size FS2 and FS4

 

news-1004-508

1) measured at n = 1450 min–1, p = 10 bar and ν = 46 mm2/s

2) max 10 s, max. 50 % of duty cycle *******

3) Caution! The restrictions for special fluids also apply for these media

4) The cleanliness classes specified for components must be adhered to in hydraulic systems.

Effective filtration prevents malfunction and, at the same time, prolongs the service life of components.

For the selection of filters, see data sheets RE 50070, RE 50076, RE 50081, RE 50086 and RE 50088.

Characteristic curve average values of FS 2 and 3 (measured at n = 1450 min–1; ν = 46 mm2/s and ϑ = 50 °C)

news-914-412

news-888-706

news-841-482

More gear pump performance

 

When it comes to the performance curve of a gear pump, we must have a deep understanding of the principles behind it and how it affects the operation of the pump. A gear pump is a common positive displacement pump whose working principle is based on a pair of meshing gears that rotate to produce fluid movement. On the performance curve of a gear pump, we can see two main parameters: flow and pressure, which are the key to understanding the working performance of a gear pump.

 

Let's take a look at flow. Flow refers to the volume of liquid passing through the pump per unit time. On the performance curve of a gear pump, flow is usually expressed in liters or cubic meters per unit time. As the speed of the pump increases, the flow will also increase accordingly. This is because the working principle of the gear pump determines that its output flow is proportional to the speed. Therefore, by increasing or decreasing the speed of the pump, the output flow can be adjusted to meet different application requirements.

 

Let's look at pressure. Pressure represents the resistance or pressure that the pump can overcome. On the performance curve of a gear pump, pressure is usually expressed in head or pressure units (such as bar or Pascal). As the speed of the pump increases, it usually leads to an increase or decrease in pressure, depending on the resistance of the system. In some cases, increasing the speed of the pump may result in an increase in output pressure because the liquid velocity is increased, exerting more force on the system.

 

One of the key tools for controlling the performance of a gear pump is the variable speed drive. By adjusting the variable speed drive, the speed of the pump can be changed, which affects its output flow and pressure. This precise control allows the gear pump to adapt to a variety of process and application requirements, thereby improving the efficiency and reliability of the system.

 

Another factor that affects the performance of a gear pump is the return of liquid to the suction side of the pump. This practice can be achieved through piping or a return valve. By introducing some liquid on the suction side of the pump, the resistance of the system can be changed, which affects the performance of the pump. This method is particularly suitable for applications that require flexible flow control because it can adjust the output flow without changing the speed of the pump.

 

Finally, the performance curve of the gear pump is an important tool for engineers and operators to understand the behavior of the pump. By carefully analyzing the performance curve, the optimal operating conditions can be determined and appropriate adjustments can be made to meet system needs. Therefore, for any application using a gear pump, a deep understanding of its performance curve is crucial.

 

About POOCCA

 

POOCCA Hydraulic Supplier is a professional supplier of various hydraulic products. We provide various types of gear pumps such as internal gear pumps and external gear pumps, including some well-known brands such as Rexroth, Sunny, Parker, Shimadzu, Marzocchi and Casappa. These gear pumps have different models and specifications, suitable for various industrial and mechanical applications.

 

Rexroth is a well-known brand in the hydraulic industry, and its AZPF, AZPFF and AZPGF series gear pumps enjoy a high reputation in the market. These gear pumps have reliable performance and high efficiency, suitable for various engineering and industrial applications.

 

Sunny HG internal gear pump are also a common choice, with reliable product quality and stable performance, suitable for various application scenarios in hydraulic systems.

 

Parker PGP series gear pumps are widely praised in the hydraulic industry, with excellent performance and durability, suitable for engineering machinery, agricultural machinery, industrial equipment and other fields.

 

Shimadzu SGP gear pump are another highly respected product, with reliable product quality and stable performance, widely used in the automotive industry, metallurgical industry, aerospace and other fields.

 

Marzocchi and Casappa are also well-known brands in the hydraulic industry. Their ALP, GHP and PLP series small gear pumps have excellent performance and reliability and are widely used in various engineering and mechanical equipment.

 

In addition to gear pumps, POOCCA hydraulic suppliers also provide a variety of hydraulic products such as piston pumps, vane pumps, hydraulic motors, hydraulic valves, hydraulic accessories, etc. The products of the poocca factory are characterized by high quality, strong reliability and stable performance, and are deeply trusted and praised by customers.

 

If you have any purchasing needs for hydraulic products, please feel free to contact POOCCA hydraulic suppliers. We provide high-quality products and professional services to meet your needs.

 

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