Gear pump is a kind of hydraulic pump widely used in hydraulic system, also known as hydraulic gear pump, which is generally made into quantitative pump. There are many kinds of gear pumps. According to different classification methods, they can be mainly divided into the following categories:
1, according to the tooth profile curve: it can be divided into involute tooth profile and cycloid type.
2. According to the form of gear meshing, it can be divided into external meshing and internal meshing.
3. According to the form of tooth surface, it can be divided into four types: spur gear type, helical gear type, herringbone gear type and arc gear type.
4. According to the gear series, it can be divided into single-stage gear pump and multi-stage gear pump.
5. According to the number of meshing gears, it can be divided into two-gear type and multi-gear type.
2. What are the advantages and disadvantages of gear pumps?
As a common hydraulic pump, gear pump can basically meet the market demand and work requirements. It has advantages and disadvantages:
1 and the advantages of gear pump
The gear pump has simple and compact structure, small volume, light weight, good manufacturability and low price. From the performance point of view, the gear pump has strong self-priming, insensitive to oil pollution, large speed range and impact load resistance. Another advantage of gear pump is that it works reliably and is more convenient to maintain when problems occur.
2, the shortcomings of gear pump
However, gear pumps also have some disadvantages. For example, because the groove between the end cover and the gear teeth forms many fixed sealed working chambers, it can only be used as a quantitative pump, but not as a variable pump. Secondly, the radial force of gear pump is unbalanced, the flow pulsation is large, the noise is large and the efficiency is relatively low.