Li Guoxing and Du Jia have made great contributions to the d

Now domestic began to some studies, aiming at the above problems, and achieved certain results, such as college kwok-hing lee huainan industry without gear meshing force pump design, such as design without meshing gear pump structure, and analyses the design of the pump, the pump can significantly reduce the radial force and improve the pump can withstand the pressure.

Du Jia from Chongzhou University designed the symmetrical double external meshing gear oil pump, and proposed the transformation of the internal structure of the gear oil pump to solve the problem of flow pulsation and radial force imbalance of the gear oil pump, hoping to eliminate the defects of the gear oil pump by structural change.

Of course, most of the domestic research is improved on the basis of foreign countries, but many of the research has not been applied in practice.

The design parameters of the gear type oil pump are discussed. As long as the number of teeth Z, modulus M and tooth thickness B are determined, the structure of the gear type oil pump can be basically determined, and the most critical steps in the design of the gear type oil pump are discussed.

The main causes of oil trapping are analyzed, and the solution to oil trapping is given, that is, the design of oil unloading groove.

According to the calculation method of radial force of gear oil pump, the method of reducing radial force is given.

Taking flow pulsation as the optimization object, an optimization model of design parameters was established.

Hydraulic system is the use of liquid as a transfer and conversion of energy tools, the earliest liquid transmission technology is mainly the use of water as a transmission medium, water plays an important role in the hydraulic transmission technology, in the 18th century before more than a hundred years, the leading role of hydraulic transmission has been water.

After the industrial revolution, especially after the Second World War, the level of manufacturing industry continues to improve, the manufacture of perfect performance, high precision hydraulic components become possible, hydraulic servo valve and its composition of the servo system to make the hydraulic system function become powerful;

At the same time, the petroleum and petrochemical industry has also been greatly developed. Mineral oil has also appeared in the hydraulic system because of its advantages, and hydraulic technology has really entered the oil era.

Compared with water, oil has many advantages, oil because of the large viscosity, so it can play a very good lubrication, and has a good anti-rust performance, the performance of the hydraulic system has been greatly improved, more widely used, oil for hydraulic system performance improvement and development indispensable.

Hydraulic technology is applied more and more in practical engineering. It can be said that the level of hydraulic technology is a very important index to evaluate the manufacturing level of a country or a manufacturing company.

Hydraulic pump in the hydraulic transmission technology is very key, the hydraulic pump for the whole system to provide power, it is the core of the whole hydraulic system, is the manufacture of high performance hydraulic system the most basic research object.

Nowadays, high pressure and high efficiency hydraulic pump is one of the most important research topics of hydraulic system experts at home and abroad.

According to the structure and movement of the main components of the hydraulic pump, the hydraulic pump can be divided into gear pump, vane pump, screw pump, piston pump, etc..

Relative to other structure of the pump, gear pump has simple structure, light weight, small volume, use and maintenance is very convenient, the gear oil pump is sensitive to pollution than other pump, self-priming ability is very strong, has a very wide range of application in hydraulic system at home and abroad, especially for the research and development of gear pump at home and abroad have done a lot of work, also developed many products,

Now the gear pump do the best countries have the United States and Japan.

But the gear oil pump also has many shortcomings, such as the radial force of the gear in the general structure is not the same, the flow pulsation is larger than other pumps, because the gear meshing leads to relatively large noise, so it is relatively small in some high pressure and efficient hydraulic system.

In this paper, the flow characteristics of the gear oil pump and the radial force the gear is subjected to are analyzed theoretically.

The finite volume method is used to analyze the flow field in the gear oil pump, and the influence of factors such as speed and center distance on the flow field pressure, velocity and performance of the pump is obtained.

On the basis of theoretical analysis, the influence of hydraulic pressure and gear meshing force in the pump is obtained by using finite volume method and finite element method.

It provides effective data reference for the design of gear oil pump.

The above is the introduction of "Li Guoxing and Du Jia have made great contributions to the design of gear pumps"