Hydraulic pump for mini excavator

Types of hydraulic pumps for mini excavators

• Piston pump:

  Piston pumps are hydraulic pumps with a design based on the displacement of a fluid when the piston moves inside the cylinder. These pumps feature a mechanism where the piston rises and falls within a circular cylinder. When the piston moves upward, it creates a void that draws the liquid in. When it moves downward, it exerts pressure that pushes the liquid out. Piston pumps can be divided into three categories: swash plate type, inline shoe type, and radial piston pumps. For hydraulic excavators, radial piston pumps with a drum type of swash plate are commonly used.

• Gear pumps:

  The working principle of hydraulic gear pumps for mini excavators is based on two meshing gears. When the motor drives the pump body to rotate, the gears disconnect and suck up the liquid from the inlet port. Then, the two gears mesh with each other and push the liquid out from the outlet port. The combination and disconnection of the gears continue to rotate, forming a continuous flow.

  Gear pumps have high,efficient performance and stable,low noise operation.They're also compact and cost-effective, making them a preferred choice for small excavator hydraulic systems.

• Screw pumps:

  Screw pumps consist of a fixed stator and an active rotor with a screw-like shape. When the rotor spins, it creates a cavity that allows the fluid to be drawn in and discharged. The process generates a smooth movement. Compared with gear pumps, hydraulic screw pumps for mini excavators are more efficient and have longer lifespan. However, their size is bigger and the cost is higher, which makes them not as popular as gear pumps. They're mainly applied into high-performance or heavy-duty excavator hydraulic systems.

Specification and Maintenance

Specifications for a hydraulic pump for excavators will vary according to the item type and manufacturer. The table below outlines some typical specifications that may be found when searching for hydraulic pumps for mini excavators.

• Flow Rate (L/min)

  This refers to the amount of hydraulic fluid the pump can move in one minute. It is also known as the volume flow rate. The flow rate will affect the power and speed of the excavator's movement.

• Pressure Rating (bar)

  This is the highest pressure the hydraulic pump can manage. It affects the excavator's ability to deal with heavy work.

• Power Rating (kw)

  This is the amount of power the pump will use to operate. It is determined by the pressure it generates and the motor driving the pump. A higher power rating may be necessary for larger excavators or those used in demanding environments.

• Mounting Type

  This describes how the pump is fixed in position so that it can deliver hydraulic fluid to the excavator’s motor. Pumps that use a body and mounting bracket are typical excavator gear pumps. Other mounting types include flanges and single mounts.

• Motor Type

  The motor type could be hydraulic or electric, which drives how the hydraulic fluid will be produced.

Maintenance

Correct maintenance of the hydraulic excavator pumps will be necessary if they are to be used for a longer period and not break down. The following maintenance tips can be helpful:

• Regular Pump Inspection

  A visual inspection of the hydraulic pumps should be done often to notice signs of wear and damage. Hydraulic hoses should be looked over for cuts and cracks. If they are, they will need to be replaced to avoid any form of leakage that could affect performance.

• Monitoring Fluid Levels

  Operators should pay close attention to the oil fluid levels in the hydraulic system of the excavator. If there is a sudden drop, it may indicate a leakage somewhere that should be checked. This practice will help to prolong the life span of the pump and hydraulic system.

• Cleaning Hydraulic Filters

  The filters should be regularly cleaned or replaced in the hydraulic system so that debris doesn't get to clog the pump, causing damage to be done.

• Lubrication

  Pumps should be routinely lubricated for smooth operation and to prevent wear and tear. This is especially important in excavators working in demanding situations and extreme temperatures.

Applications of hydraulic pumps for mini excavators

• Site preparation and clearance:

  In construction work, hydraulic pumps power excavator buckets to dig and clear land. They can remove topsoil and vegetation, creating a base for future construction activities. Hydraulic pumps also tilt and rotate buckets, facilitating the precise and efficient clearance of debris.

• Earthmoving:

  At excavation sites, hydraulic pumps for mini excavators dig trenches and perform tasks like backfilling and leveling. They power the moving parts of the excavator that dig into the earth and displace soil and other materials by rotating and moving in various directions. Hydraulic pumps allow the operator to control the volume and direction of displaced material with precision.

• Connecting tasks:

  Hydraulic pumps also facilitate attachment swapping and vehicle connection in a mini excavator. The excavator can connect to hydraulic systems for hydraulic drives and attachments like hydraulic breakers and crushers swapped by facilitating the connector's separation and movement. These connectors include a male part attached to an engine or hydraulic pump and a female part connected to the equipment. A typical hydraulic connector is a quick coupling connector that allows easy and fast equipment coupling.

• Demolition:

  Hydraulic pumps power mini excavators during demolition and dismantling by operating specialized attachments. They may break down structures using hydraulic shears or a hydraulic breaker. After breaking up the structure, the excavator can load the debris into a truck using hydraulic-powered sorting implements, hydraulic grabs, or buckets.

How to choose hydraulic pump for mini excavator

When looking for a hydraulic pump for excavators, it is important to consider various factors such as the equipment's compatibility, performance, quality, multitasking capability, maintenance requirements, safety features, and any specific industrial standards or regulations.

• Compatibility with Mini Excavator:

It is important to ensure that the excavator hydraulic pump fits well. This ensures that it can function appropriately and that the hydraulic circuits are entirely linked.

• Performance:

Consider the flow rate and pressure the hydraulic pump can manage. The performance of an excavator will depend on this. Mini excavators require high pressure and flow rates to operate effectively. Hence, it is important to choose a hydraulic pump that can handle the pressure and flow rate requirements of the excavator.

• Quality and durability:

A hydraulic pump is a significant investment. Therefore, the hydraulic pump chosen should be of good quality and durable. In order to prevent downtime, repairs, and replacements, it should be able to withstand the demanding conditions of excavation work.

• Multitask capability:

Excavators use hydraulic pumps to carry out various tasks. From digging to lifting and loading, it is important to choose a hydraulic pump that can support different functions and tasks smoothly.

• Maintenance requirement:

A hydraulic pump needs regular maintenance to operate optimally and prolong its lifespan. It is paramount to consider the maintenance requirements of the hydraulic pump, such as easy access for servicing, replaceable components, and maintenance schedules.

• Safety features:

Consider the safety features of the hydraulic pump, such as overload protection and pressure relief valves. Accessories mini excavator hydraulic pumps safety are crucial for preventing accidents and protecting equipment.

Q&A

Q: Does an excavator use hydraulic pumps?

A: Yes, hydraulic pumps are the main driving force behind excavators. They are responsible for supplying power to the excavator's hydraulic system, allowing it to moveand operate various functions, such as digging, lifting, and dumping.

Q: What are the signs of a failing hydraulic pump?

A: Several symptoms may indicate a faulty mini hydraulic pump for excavator equipment. This includes a drop in hydraulic pressure, unusual noise, wear, and tear, overheating, or leakage. A qualified technician should check a hydraulic pump showing such signs as soon as possible.

Q: What is the lifespan of a hydraulic pump?

A: With proper maintenance, hydraulic pumps can last up to 10 to 20 years. However, the lifespan of the pump may vary depending on factors such as the quality of material used to make the pump, operating conditions, and environment, and whether the hydraulic pump was correctly installed.