The hydraulic pump and plunger type metering 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 symptoms of wear or damage to the parts of the concentrated pressure pump.

In daily use of hydraulic pump, if people have knowledge of pump installation, oil and trouble shooting and how to carry out maintenance and repair, they can greatly delay the wear and tear of hydraulic pump parts 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), so that the hydraulic pump will get the proper accuracy and performance. In some cases, the skilled operator, through excellent repair and assembly skills, can even improve the performance of the hydraulic pump. Today, Huaian hydraulic diaphragm metering pump manufacturers of small editor to summarize the causes of damage to the hydraulic pump:

There are all kinds of reasons for the damage of the hydraulic pump, but the essence of the hydraulic pump is mainly the following two kinds.

(1) wear and tear

The wear of the parts of the hydraulic pump is the same as the parts of any equipment, which is the inevitable result of the mechanical operation. Under normal service conditions, that is to observe the operation rules and maintenance regulations of pumps, the gradual increase of wear due to friction and chemical reaction is natural wear. This kind of wear can not be eliminated and avoided, but through careful maintenance and proper use of the pump, the wear speed can be slowed down and the cycle of wear is prolonged.

The main reasons and phenomena of wear are as follows:

1. friction 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. It is 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 kind of hydraulic element for fatigue damage. Under the action of alternating load, the residual stress and metal fatigue are produced due to periodic compression and deformation. As a result, tiny cracks are produced on the parts, resulting in the gradual exfoliation of small pieces and small pieces on the surface of the parts.

4. corrosive wear

The surface of the hydraulic pump element is eroded by the acid, water and other corrosive substances in the fluid, and the metal surface is gradually damaged.

The particles worn down by the above wear and tear continue to fall between the two moving parts, which will aggravate the wear of the shallow surface. According to the test, the maximum wear volume of the swashplate type plunger pump occurs in the abrasive wear of 5~10 m solid particles, and two of the solid particles wear, and the decrease of the oil delivery volume of the hydraulic pump is due to the 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 is the most worn, but the wear is uniform, the sliding surface, such as the oil distribution surface, is kept very small, so the leakage is small. The abrasive particles are worn from large and small, so the wear images of large and small particles must be paid attention to at the same time and are reduced and improved.

(2) 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.