| Volumetric flow, max. | 5.4 l/min |
| Viscosity range | 20 to 80 mm²/s |
| Speed range | 1,500 U/min |
Gear pumps
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Gear pumps - Efficient fluid handling for various applications
Gear pumps are a common type of positive displacement pump used in many industries for pumping liquids. Their applications range from the food industry to the chemical and pharmaceutical industries to the oil and gas sector. This technical text explains in more detail how gear pumps work, the different types of construction and the areas of application.
The operation of a gear pump is based on the interaction of two gears rotating in a housing. In the process, the teeth of the two gears mesh to form a sealed conveying chamber. The rotation of the gears transports the pumped medium from the inlet side to the outlet side. The direction of rotation of the gears determines the direction in which the medium is conveyed. Due to the close fit of the gears and the sealed housing, gear pumps achieve high pressures and flow rates.
There are various types of gear pumps, which differ in terms of the arrangement and shape of the gears. The simplest design is the external gear pump, in which the gears are mounted on the outside of the housing. This design is particularly suitable for viscous media, as the gears ensure a uniform and continuous flow. In the internal gear pump, on the other hand, the gears are located inside the housing. This design enables pulsation-free conveying of media with low viscosity. Screw pumps are a special form in which a helical gear wheel rotates in a cylindrical housing. These pumps are particularly suitable for abrasive media and high pressures.
Gear pumps are used in a wide variety of applications. In the food industry, for example, they are used to transport liquids such as milk, juice or chocolate. Due to their hygienic design, they can be cleaned without any problems and thus meet the strict requirements of the food industry. In the chemical and pharmaceutical industries, gear pumps are used for pumping aggressive chemicals or high-purity solutions. Here they are indispensable due to their chemical resistance and their ability to deliver precise dosages. Gear pumps are also used in the oil and gas industry, for example to lubricate machinery or transport crude oil.
In summary, gear pumps play an important role in various industries due to their efficient operation and versatility. Their robust design, high pressure and delivery performance, and resistance to different media make them a reliable solution for fluid handling.
Gear pumps are a common type of positive displacement pump used in many industries for pumping liquids. Their applications range from the food industry to the chemical and pharmaceutical industries to the oil and gas sector. This technical text explains in more detail how gear pumps work, the different types of construction and the areas of application.
The operation of a gear pump is based on the interaction of two gears rotating in a housing. In the process, the teeth of the two gears mesh to form a sealed conveying chamber. The rotation of the gears transports the pumped medium from the inlet side to the outlet side. The direction of rotation of the gears determines the direction in which the medium is conveyed. Due to the close fit of the gears and the sealed housing, gear pumps achieve high pressures and flow rates.
There are various types of gear pumps, which differ in terms of the arrangement and shape of the gears. The simplest design is the external gear pump, in which the gears are mounted on the outside of the housing. This design is particularly suitable for viscous media, as the gears ensure a uniform and continuous flow. In the internal gear pump, on the other hand, the gears are located inside the housing. This design enables pulsation-free conveying of media with low viscosity. Screw pumps are a special form in which a helical gear wheel rotates in a cylindrical housing. These pumps are particularly suitable for abrasive media and high pressures.
Gear pumps are used in a wide variety of applications. In the food industry, for example, they are used to transport liquids such as milk, juice or chocolate. Due to their hygienic design, they can be cleaned without any problems and thus meet the strict requirements of the food industry. In the chemical and pharmaceutical industries, gear pumps are used for pumping aggressive chemicals or high-purity solutions. Here they are indispensable due to their chemical resistance and their ability to deliver precise dosages. Gear pumps are also used in the oil and gas industry, for example to lubricate machinery or transport crude oil.
In summary, gear pumps play an important role in various industries due to their efficient operation and versatility. Their robust design, high pressure and delivery performance, and resistance to different media make them a reliable solution for fluid handling.
What are gear pumps and how do they work?
Gear pumps are a type of positive displacement pump used for pumping liquids. They consist of two gear wheels mounted in a housing. These gears mesh with each other and rotate in opposite directions.
The gear pump works by the gears capturing liquid between the teeth and transporting it through the housing. When the gears rotate, a volume is created between the teeth, which increases and draws in liquid. As the gears continue to turn, the volume decreases and the liquid is expelled.
The rotation of the gears is normally driven by a motor. The pumps can be available in different sizes and designs and are used in various applications, such as hydraulics, the chemical industry, food processing and many other areas where continuous fluid transportation is required.
The gear pump works by the gears capturing liquid between the teeth and transporting it through the housing. When the gears rotate, a volume is created between the teeth, which increases and draws in liquid. As the gears continue to turn, the volume decreases and the liquid is expelled.
The rotation of the gears is normally driven by a motor. The pumps can be available in different sizes and designs and are used in various applications, such as hydraulics, the chemical industry, food processing and many other areas where continuous fluid transportation is required.
What different types of gear pumps are there and what are they used for?
There are different types of gear pumps, which have different attributes and functions depending on the application. Here are some of the most common types of gear pumps and their uses:
1. External gear pumps: This type of gear pump uses a large, outer gear wheel with smaller, inner teeth. They are often used in applications where a constant flow rate is required, such as in hydraulic systems or as lubrication pumps.
2. Internal gear pumps: In this type of gear pump, both the outer and inner gears are the same size and have teeth on both sides. These pumps offer high efficiency and are often used in applications with high pressure, such as hydraulic systems or as fuel pumps.
3. Worm gear pumps: This type of gear pump consists of a worm that engages in a gear chamber. They are often used in applications with viscous liquids, such as in the food industry or in the chemical industry.
4. Internal gear pumps with axial displacement: This type of gear pump has an outer gear with internal teeth and an inner gear with external teeth. They offer high performance and are often used in high-pressure and high-volume applications, such as in the oil and gas industry or in high-pressure hydraulic systems.
5. Rotary vane gear pumps: This type of gear pump uses a rotary vane that engages in a gear chamber. They are suitable for applications with low pressure and high volume, such as in vacuum pumps or in waste water treatment plants.
This list is not exhaustive, as there are other specialized types of gear pumps that have been developed for specific applications. The exact choice of gear pump depends on the requirements of the particular application, such as pressure, flow rate, viscosity of the fluid and environmental factors.
1. External gear pumps: This type of gear pump uses a large, outer gear wheel with smaller, inner teeth. They are often used in applications where a constant flow rate is required, such as in hydraulic systems or as lubrication pumps.
2. Internal gear pumps: In this type of gear pump, both the outer and inner gears are the same size and have teeth on both sides. These pumps offer high efficiency and are often used in applications with high pressure, such as hydraulic systems or as fuel pumps.
3. Worm gear pumps: This type of gear pump consists of a worm that engages in a gear chamber. They are often used in applications with viscous liquids, such as in the food industry or in the chemical industry.
4. Internal gear pumps with axial displacement: This type of gear pump has an outer gear with internal teeth and an inner gear with external teeth. They offer high performance and are often used in high-pressure and high-volume applications, such as in the oil and gas industry or in high-pressure hydraulic systems.
5. Rotary vane gear pumps: This type of gear pump uses a rotary vane that engages in a gear chamber. They are suitable for applications with low pressure and high volume, such as in vacuum pumps or in waste water treatment plants.
This list is not exhaustive, as there are other specialized types of gear pumps that have been developed for specific applications. The exact choice of gear pump depends on the requirements of the particular application, such as pressure, flow rate, viscosity of the fluid and environmental factors.
How are gear pumps used in industry?
Gear pumps are used in industry for various applications where continuous pumping of liquids is required. Here are some examples:
1. Hydraulic systems: Gear pumps are used in hydraulic systems to build up pressure and transfer fluids. They are used in machines such as presses, injection molding machines and hydraulic presses.
2. Lubrication systems: Gear pumps are used in lubrication systems to deliver lubricating oil or grease to ensure the lubrication of machine parts. They are used in motors, gearboxes and other mechanical systems.
3. Cooling systems: In cooling systems, gear pumps are used to pump coolant through the system and thus dissipate the heat. They are used in cooling systems, air conditioning systems and refrigerators.
4. Chemical industry: In the chemical industry, gear pumps are used for the transfer of chemicals. They enable precise dosing and controlled mixing of liquids.
5. Food industry: In the food industry, gear pumps are used for the transfer of liquid foods such as sauces, syrups and oils. They ensure gentle conveying and prevent damage or contamination of the food.
These are just a few examples of the use of gear pumps in industry. Due to their reliability, efficiency and versatility, they are widely used in many areas.
1. Hydraulic systems: Gear pumps are used in hydraulic systems to build up pressure and transfer fluids. They are used in machines such as presses, injection molding machines and hydraulic presses.
2. Lubrication systems: Gear pumps are used in lubrication systems to deliver lubricating oil or grease to ensure the lubrication of machine parts. They are used in motors, gearboxes and other mechanical systems.
3. Cooling systems: In cooling systems, gear pumps are used to pump coolant through the system and thus dissipate the heat. They are used in cooling systems, air conditioning systems and refrigerators.
4. Chemical industry: In the chemical industry, gear pumps are used for the transfer of chemicals. They enable precise dosing and controlled mixing of liquids.
5. Food industry: In the food industry, gear pumps are used for the transfer of liquid foods such as sauces, syrups and oils. They ensure gentle conveying and prevent damage or contamination of the food.
These are just a few examples of the use of gear pumps in industry. Due to their reliability, efficiency and versatility, they are widely used in many areas.
What are the advantages of gear pumps compared to other types of pumps?
Gear pumps offer several advantages compared to other types of pumps:
1. High efficiency: Gear pumps have a high volumetric efficiency as they allow a continuous flow without leakage. This means that they consume less energy and work more efficiently.
2. Low pulsation: In contrast to other pump types such as piston pumps, gear pumps generate a low pulsation in the liquid flow. This results in an even and stable flow, which is an advantage in many applications.
3. Good self-priming capability: Gear pumps have a good self-priming capability, which means that they can suck liquids from lower heights. This is particularly useful if the pump is used in an application in which the liquid does not flow into the pump by itself.
4. Good handling of viscous liquids: Gear pumps are well suited for pumping liquids with high viscosity. The narrow gap between the gears ensures a good seal, which enables the pump to pump liquids with high viscosity efficiently.
5. Compact design: Gear pumps are usually relatively compact and require less space than other pump types. This makes them ideal for applications where available space is limited.
Overall, gear pumps offer a reliable and efficient solution for many applications, especially when it comes to pumping viscous liquids.
1. High efficiency: Gear pumps have a high volumetric efficiency as they allow a continuous flow without leakage. This means that they consume less energy and work more efficiently.
2. Low pulsation: In contrast to other pump types such as piston pumps, gear pumps generate a low pulsation in the liquid flow. This results in an even and stable flow, which is an advantage in many applications.
3. Good self-priming capability: Gear pumps have a good self-priming capability, which means that they can suck liquids from lower heights. This is particularly useful if the pump is used in an application in which the liquid does not flow into the pump by itself.
4. Good handling of viscous liquids: Gear pumps are well suited for pumping liquids with high viscosity. The narrow gap between the gears ensures a good seal, which enables the pump to pump liquids with high viscosity efficiently.
5. Compact design: Gear pumps are usually relatively compact and require less space than other pump types. This makes them ideal for applications where available space is limited.
Overall, gear pumps offer a reliable and efficient solution for many applications, especially when it comes to pumping viscous liquids.
What materials are used for gear pumps and why?
Different materials are used for gear pumps, depending on the requirements and areas of application of the pump. Some of the commonly used materials are:
1. Steel: Steel is a popular material for gear pumps due to its strength and durability. It can be produced in different alloys to ensure good corrosion resistance and wear resistance.
2. Cast iron: Cast iron is often used for gear pumps as it has high strength and good wear resistance. It is also relatively inexpensive compared to other materials.
3. Stainless steel: Stainless steel is used for gear pumps when high corrosion resistance is required. It is resistant to chemical substances and moisture, which makes it ideal for industrial applications.
4. Aluminum: Aluminum is often used in lightweight pumps because it has high strength at a relatively low weight. It is also corrosion-resistant and easy to process.
5. Plastics: Certain plastics such as PTFE (polytetrafluoroethylene) and PEEK (polyetheretherketone) are used for gear pumps when chemical resistance, low weight or other specific attributes are required.
The choice of material depends on factors such as the type of liquid to be pumped, the temperature, the pressure and the service life of the pump. It is important to select the right material to ensure optimum performance and a long service life of the gear pump.
1. Steel: Steel is a popular material for gear pumps due to its strength and durability. It can be produced in different alloys to ensure good corrosion resistance and wear resistance.
2. Cast iron: Cast iron is often used for gear pumps as it has high strength and good wear resistance. It is also relatively inexpensive compared to other materials.
3. Stainless steel: Stainless steel is used for gear pumps when high corrosion resistance is required. It is resistant to chemical substances and moisture, which makes it ideal for industrial applications.
4. Aluminum: Aluminum is often used in lightweight pumps because it has high strength at a relatively low weight. It is also corrosion-resistant and easy to process.
5. Plastics: Certain plastics such as PTFE (polytetrafluoroethylene) and PEEK (polyetheretherketone) are used for gear pumps when chemical resistance, low weight or other specific attributes are required.
The choice of material depends on factors such as the type of liquid to be pumped, the temperature, the pressure and the service life of the pump. It is important to select the right material to ensure optimum performance and a long service life of the gear pump.
How is the performance of a gear pump measured?
The performance of a gear pump is usually measured by the volume flow and pressure. The flow rate indicates how much liquid is pumped through the pump per unit of time, while the pressure indicates the pressure difference generated between the inlet and outlet of the pump. The performance of a gear pump can therefore be achieved through a combination of high volume flow and high pressure. In industry, standardized tests are often carried out to measure and compare the performance of a gear pump.
What maintenance and care instructions are important for gear pumps?
The following instructions are important for the proper maintenance and care of gear pumps:
1. Regular cleaning: The gear pump should be regularly cleaned of dirt, deposits or impurities. This can be done with a soft cloth or a brush. No harsh or abrasive cleaning agents should be used to prevent damage to the gears.
2. Lubrication: The gears and bearings of the pump must be lubricated regularly to ensure smooth operation. Care must be taken to ensure that the correct lubricant is used and that the lubrication intervals are observed.
3. Check the seals: The seals of the gear pump should be checked regularly for damage or wear. If necessary, they should be replaced to prevent leaks.
4. Checking the pump performance: The performance of the gear pump should be checked regularly to ensure that it meets the requirements. Pressure and flow measurements can be carried out.
5. Monitoring of the operating temperature: The operating temperature of the gear pump should be monitored regularly to prevent overheating. If the temperature is too high, damage may occur to the gears or other components.
6. Replacement of wearing parts: Wear parts such as gear wheels, bearings or seals should be replaced if necessary to maintain the functionality of the pump.
7. Training of the operating personnel: The operating personnel should be trained in the correct handling and maintenance of the gear pump in order to avoid damage due to improper use.
It is important to follow the manufacturer's specific maintenance and care instructions, as these may vary depending on the model and application.
1. Regular cleaning: The gear pump should be regularly cleaned of dirt, deposits or impurities. This can be done with a soft cloth or a brush. No harsh or abrasive cleaning agents should be used to prevent damage to the gears.
2. Lubrication: The gears and bearings of the pump must be lubricated regularly to ensure smooth operation. Care must be taken to ensure that the correct lubricant is used and that the lubrication intervals are observed.
3. Check the seals: The seals of the gear pump should be checked regularly for damage or wear. If necessary, they should be replaced to prevent leaks.
4. Checking the pump performance: The performance of the gear pump should be checked regularly to ensure that it meets the requirements. Pressure and flow measurements can be carried out.
5. Monitoring of the operating temperature: The operating temperature of the gear pump should be monitored regularly to prevent overheating. If the temperature is too high, damage may occur to the gears or other components.
6. Replacement of wearing parts: Wear parts such as gear wheels, bearings or seals should be replaced if necessary to maintain the functionality of the pump.
7. Training of the operating personnel: The operating personnel should be trained in the correct handling and maintenance of the gear pump in order to avoid damage due to improper use.
It is important to follow the manufacturer's specific maintenance and care instructions, as these may vary depending on the model and application.
How can the wear of gear pumps be minimized?
The wear of gear pumps can be minimized in various ways:
1. Selecting the right lubricant: A high-quality lubricant with the right attributes such as viscosity and lubricity can reduce gear wear.
2. Regular maintenance: Regular inspection and maintenance of the gear pump can detect and rectify signs of wear at an early stage.
3. Use of high-quality materials: Gear pumps made of high-quality materials have a longer service life and are less susceptible to wear.
4. Avoidance of overloading: Overloading the gear pump can lead to increased wear. It is important not to overload the pump beyond its limits and to ensure that it is suitable for the specific application.
5. Check the operating temperature: Excessive heating of the gear pump can lead to premature wear. It is important to keep an eye on the operating temperature and, if necessary, take measures to prevent overheating.
6. Training of the operating personnel: Correct handling of the gear pump can minimize wear. The operating personnel should be trained to operate the pump properly and avoid possible errors.
7. Avoidance of contamination: Contamination such as dirt, particles or aggressive chemicals can accelerate the wear of the gears. It is important to protect the gear pump from contamination and to use filters or other protective devices if necessary.
By combining these measures, the wear on gear pumps can be minimized, resulting in a longer service life and more efficient operation.
1. Selecting the right lubricant: A high-quality lubricant with the right attributes such as viscosity and lubricity can reduce gear wear.
2. Regular maintenance: Regular inspection and maintenance of the gear pump can detect and rectify signs of wear at an early stage.
3. Use of high-quality materials: Gear pumps made of high-quality materials have a longer service life and are less susceptible to wear.
4. Avoidance of overloading: Overloading the gear pump can lead to increased wear. It is important not to overload the pump beyond its limits and to ensure that it is suitable for the specific application.
5. Check the operating temperature: Excessive heating of the gear pump can lead to premature wear. It is important to keep an eye on the operating temperature and, if necessary, take measures to prevent overheating.
6. Training of the operating personnel: Correct handling of the gear pump can minimize wear. The operating personnel should be trained to operate the pump properly and avoid possible errors.
7. Avoidance of contamination: Contamination such as dirt, particles or aggressive chemicals can accelerate the wear of the gears. It is important to protect the gear pump from contamination and to use filters or other protective devices if necessary.
By combining these measures, the wear on gear pumps can be minimized, resulting in a longer service life and more efficient operation.