Hydraulic Pumps Overview

A type of positive displacement pump that uses meshing gears to move fluid.

Fluid is carried around the outside of each gear, not through the center.

The process where gear teeth come together and force fluid out.

Fluid fills the spaces as gear teeth come out of the mesh.

Fluid is squeezed out of the gear gaps by mating teeth.

A positive displacement pump with rounded lobes that continuously contact.

The rate at which the pump displaces fluid.

Transfer of fluid from one point to another by the pumps.

Pump design with diametrically opposed ports for balanced radial forces.

Grooves in side plates that introduce delivery pressure to the vane slots.

Vanes are pushed by delivery pressure and rotate with cam contour loads.

Rotor driven by a shaft through a loose spline.

Pumps widely used in various engineering fields due to advantages like stepless speed regulation and automation.

Focuses on intelligent factories, digitization, and networking.

Research focused on methods for identifying pump issues.

Typical failures occur under extreme operating conditions like high temperature, high pressure, and variable load.

Identifying and locating problems in hydraulic piston pumps (HPPs) to prevent damage, accidents, and economic losses.

HPPs under various operating conditions generate multiple mixed signals (vibration, sound, pressure, flow) making signal analysis difficult.

Fault identification methods utilizing algorithms to mine data, and establish models to identify different pump conditions.

Difficult to pinpoint failures due to variable working conditions, different types of signals, and complexity of the piston pump's structure.

Faulty components, incorrect operation, or complex working environments can lead to equipment damage and stop operations.

Using large datasets from the pump's operation to diagnose its working status and potential faults.

Methods used before the era of intelligent approaches that may struggle with complex and variable signals from modern high-precision pumps.

HPPs generate various signals like vibration, sound, pressure, and flow data to assess operational health.

Methods for finding problems in hydraulic piston pumps (HPPs).

Techniques to diagnose problems in HPPs using different signal types.

Using advanced methods to diagnose pump failures.

Older methods for diagnosing problems in HPPs.

More recent techniques of diagnosing pump problems.

Methods combining traditional and modern approaches.

A type of HPP with pistons arranged radially.

Pumps using diaphragms to move fluid.

A pump that increases fluid pressure by using a rotating impeller to impart mechanical energy.

Pressure inside the pumping chamber that changes during different pump cycles.

Phase of the pump cycle where the chamber volume increases, causing pressure to decrease.

Phase of the pump cycle where the chamber volume decreases, causing pressure to increase.

Type of centrifugal pump where fluid flows primarily radially outward from the impeller.

Type of centrifugal pump where fluid flow is a combination of radial and axial components.

Type of centrifugal pump where fluid flows predominantly axially along the impeller shaft.

The force that moves the liquid outwards by rotation of the impeller in a centrifugal pump.

The volume of liquid pumped per unit of time.

The elevation difference of a fluid surface, measured in meters or feet.

A pump where fluid moves radially.

A pump where fluid moves axially.

A pump where fluid moves both radially and axially.

The difference in elevation between liquid levels at the pump's inlet and outlet.

Elevation difference between the liquid level and the datum.

The flow rate of liquid pumped out of a pump.