Hydraulic pump plunger pump in use after a certain period of time, will gradually wear and damage to the parts, resulting in reduced pump movement accuracy and performance, will not hit the oil pressure, fuel supply reduction, noise increasing, vibration increase and other abnormal phenomenon. These phenomena are often the symptoms of wear or damage of the pump parts.

In the daily use of the hydraulic pump, if people have to install, remove oil pump operation, fault, Tanzania and how to preserve and maintain the knowledge, you can greatly delay the hydraulic pump parts wear or avoid damage.

Once the parts of the hydraulic pump are worn out and exceed the allowable deviation, they must be repaired in time and restored (or replaced) to make the hydraulic pump regain its due precision and working performance. In some cases, skilled operators, through good repair and assembly skills, and even improve the performance of the hydraulic pump.

Causes of hydraulic pump damage

There are various reasons for the damage of hydraulic pumps, but there are two main types of damage to the hydraulic pump.

(I) wear

The wear of hydraulic pump parts is the same as the parts of any equipment, which is the inevitable result of mechanical operation. Under normal service conditions (i.e., compliance with pump operating procedures and maintenance regulations), wear due to friction and chemical reaction for a long time increases gradually, which belongs to natural wear. The wear and tear can not be eliminated and avoided, but through careful maintenance and proper use of the pump, can slow down the wear rate, extend the wear cycle.

The causes and phenomena of wear are mainly as follows:

1. friction and wear

The surface manufacturing parts after carefully with a magnifying glass, always rugged, after hydraulic pump operation after abrasion, the metal particles from the surface of parts, parts of the surface of rugged places relatively smooth, and then continue to friction, small grinding will have a deep impression or size, this is the normal wear of friction and wear the nature of the. Abrasive wear, also called abrasive wear.

2. abrasive wear

The parts with the surface there are solid particles of pollutants, according to the analysis of the hydraulic pump oil pollutants, the pollution of particles is more than 20% of silica and metal oxides, these few wear is the most serious wear components of pump parts, the surface of them between pairs of parts, while on the move, the equivalent of the grinding effect of abrasive wear, produced intense.

3. pit wear

This is a hydraulic component for fatigue damage. Under the alternating load, due to periodic compression and deformation, residual stress and fatigue phenomenon, the micro crack in the parts that caused a small, slowly peeling, small stone surface.

4. corrosive wear

The surface of hydraulic pump element is corroded by corrosive substances such as acids and water in oil, and the metal surface is gradually damaged.

These abrasive particles will continue to fall between the two moving parts, and will aggravate the superficial wear. According to the test, the maximum wear rate of swash plate suction piston pump occurs in the abrasive wear of solid particles of 5~10 ~ m, while two of the hydraulic pump oil loss is due to abrasive wear of 40~60 solid particles. The reason is that the latter on the sliding surface of uneven wear, especially with oil baffle and cylinder. Hugh column. The local partition between the plug row inferior, although the friction is little, but the oil hydraulic pump F was significantly decreased.

Although the former has the largest wear, but the wear is uniform, still can make the slide table, such as the oil distribution surface to maintain a very small gap, so the leakage is not large. Abrasive grains are malignant wear of small and big ones, so the wear and tear of large and small particles must be paid attention to at the same time, and reduced and improved.

(II) accident

Violation of the pump operation procedures and maintenance requirements, causing serious overload, overspeed, and pump parts has been advised and loose off, still forced to start, or after overhaul of heavy equipment, hydraulic pump parts tools and other objects fall into the pump and causes the secondary damage phenomenon.