Oil pump types

Types of oil pumps

There are oil pump types to choose from. Here are some of them:

• Gear oil pump

  Internally and externally gear oil pumps are the two types of gear oil pumps. Both of these pumps have two gears that rotate against each other. The turning of the gears creates a suction effect that draws the oil into the pump. The oil is discharged when the gears create a space between the casing and the inlet and a space between the teeth and the outlet. The difference between the two types of gear oil pumps is how the gears are arranged. In an internal gear oil pump, the driving gear is located in the center of the pump and is rotated by a motor. The idler gear, which is the second gear, is located inside the first gear and rotates around the first gear in a clockwise direction. The external gear oil pump is slightly different. It has both the driving gear and the idle gear positioned externally. The driving gear and the idle gear are located beside each other in the external gear oil pump, and they rotate in the opposite direction to each other. Despite the different arrangements, the gears in both types of oil pumps work together to move the oil through the pump.

• Rotary-vane oil pump

  Another type of oil pump is the rotary-vane oil pump. The rotary-vane oil pump consists of a rotor that turns inside a pump casing. The rotor has several slots with vanes or blades inserted. When the rotor turns, the vanes slide in and out of the slots, creating chambers of varying size. This movement creates a suction effect that draws oil into the pump and forces it out through the discharge outlet. The rotary-vane oil pump comes in different types, including the constant-displacement, variable-displacement, and dual-rotor rotary-vane oil pumps.

• Oil-filled pump

  The oil-filled pump has an electric motor and a pumping element that is completely submerged in oil. This makes the oil-filled pump completely filled with oil. The oil-filled pump uses the oil to cool and lubricate the pump and motor components.

Specifications and maintenance of oil pump types

Different types of oil pumps have varying specifications that affect their performance. Here are some of them:

• Oil pump gear

  The rotary gear oil pump is a mechanical pump that uses gears to create flow and pressure. When the gears rotate, the oil enters the pump's inlet side (the suction side), fills the space between the gears and the pump housing, and then discharges from the outlet side (the pressure side). The oil on the inlet side causes the gears to separate, creating a space that generates a low pressure. This process allows the gears to pull apart without physical contact, preventing oil from leaking between them and the pump housing. The pumping action occurs as one gear pushes the other, transferring the oil from the inlet to the outlet side. This coordinated movement of the two interdependent actions maintains the constant flow of oil, ensuring effective lubrication and hydraulic power transfer in various applications.

• Diaphragm oil pump

  A diaphragm oil pump uses a diaphragm to create pressure differentials within its chambers. The diaphragm is actuated mechanically, electrically, or pneumatically, leading to a volume change in one chamber while the other remains constant. This volume change results in a pressure differential between the two chambers, causing fluid to flow from the chamber with lower pressure to the one with higher pressure. The diaphragm's movement facilitates the transfer of fluid, enabling the pumping action. Additionally, one-way valves at the inlet and outlet ensure unidirectional flow, preventing backflow and maintaining the integrity of the pumping process.

• Vane oil pump

  A vane oil pump has a rotor with several slots on the circumference. The slots hold steel vanes that slide in and out. As the motor with the rotor and vanes rotates in the pump housing, centrifugal force pushes the vanes against the housing's inner surface. The space between the vanes and the housing wall creates a seal, preventing fluid from leaking. However, a small gap remains between the vanes and the housing to allow for fluid transfer. This design ensures the movement of fluid through the pump while maintaining consistent flow and pressure. The rotor's rotation creates chambers of varying volume, drawing fluid in at the inlet and discharging it at the outlet. This mechanism enables the vane oil pump to regulate fluid flow and pressure, making it suitable for various applications.

• Oil pump maintenance

  Regular maintenance of the oil pump is crucial for its optimal performance and longevity. Here are some essential maintenance practices:

  1. Follow the manufacturer's guidelines for inspection and maintenance schedules.

  2. Ensure that the oil used meets the specified standards and quality requirements.

  3. Regularly check the oil level in the reservoir and maintain it within the recommended range.

  4. Inspect the oil for signs of contamination, such as debris, sludge, or water ingress.

  5. Clean or replace filters as per the maintenance schedule to prevent clogging and ensure smooth oil flow.

  6. Check for leaks, cracks, or damage in the oil lines, fittings, and pump components.

  7. Monitor pump performance parameters such as pressure and flow rate to detect anomalies.

  8. Ensure proper alignment and tensioning of drive belts or coupling between the motor and the pump.

  9. Lubricate moving parts of the pump and associated components as per the manufacturer's recommendations.

  10. Keep the pump and surrounding area clean and free from dust and debris.

How to choose oil pump types

When sourcing oil pumps for sale, it is important to consider several factors, including:

• Application: What is the intended use of the oil pump? Is it going to be used in a vehicle or equipment that requires a specific type of oil pump? Different applications may require different types of oil pumps, so it is important to source the right one for the intended use.
• Flow rate and pressure: The oil flow rate and pressure requirements for the intended application should also be considered. This is because different oil pump types are designed to provide varying flow rates and pressure levels. For instance, positive displacement pumps provide a constant flow rate, while dynamic pumps provide varying flow rates.
• Viscosity: Consider the oil's viscosity that the pump will handle. Viscosity is a measure of a fluid's resistance to flow. It affects the flow rate and pressure generated by the oil pump. When sourcing oil pumps, ensure they are designed to handle oils with similar viscosity characteristics.
• Installation: Consider the ease of installing the oil pump. Some pumps require complex installation processes, while others are easy to install. Additionally, the maintenance and serviceability of the oil pump should be considered.
• Cost: Different oil pump types come with varying costs. When sourcing oil pumps for sale, it is important to compare prices from different suppliers and manufacturers and find a pump that fits the budget.
• Quality and reliability: When sourcing oil pumps for sale, it is important to consider the quality and reliability of the pump. Choosing a high-quality and reliable oil pump ensures optimal performance and durability.

How to DIY and Replace Oil Pump Types

Replacing a pump in an engine is not a DIY kind of thing unless one is a pro in the field. However, to get an insight into how it is done, read through.

First, it is important to know which type of pump one has in the vehicle. Is it a gear pump, rotor pump, or vane pump? This is because the replacement process is dependent on the kind of pump one has.

Secondly, get the right tools for the job. This includes a socket set, wrenches, and a new oil pump. Make sure to get an oil pump that is compatible with the one in the car. Remember, the processes are different depending on the type of pump.

Read through the manufacturer's manual to understand how to get the old oil pump out and install the new one. The manual will also give more information on which type of pump is in the vehicle.

With the right tools, knowledge, and preparation, replacing an oil pump can be a manageable task for those with mechanical experience. However, it is always advisable to consult a professional when in doubt.

Q and A

Q1: What is the main work of an oil pump?

A1: The primary work of the oil pump is to pump oil or lubricant from the oil sump to the engine parts that require lubrication. It does this so that there is no friction between the moving parts, which can cause wear and tear.

Q2: How does one know that the oil pump is faulty?

A2: The oil pump is very crucial for the smooth running of the engine. When it develops a problem, it affects the engine, and one will be able to tell by the following signs: the engine will run roughly or make unusual noises, there will be a warning sign on the dashboard, and the engine will not be able to run.

Q3: Can a faulty oil pump be replaced?

A3: Yes, it can be replaced. However, it is advisable to have it checked as soon as possible before it damages the engine. Replacing an oil pump is a very delicate task and should be done by a professional.