Gear pump classification
1. According form of gear meshing can be divided into: external meshing and internal meshing.
2. According gearshape curve, it can be divided into: involute geartype and cycloidal type.
3. According form of gearsurface, it can be divided into: straight geargear type, helical gear type, herringbone gear type, circular arc gearsurface gear type.
4. According number of meshing gear: two-gear and multi-gear.
5. According material: stainless steel gear pump and cast iron gear pump.
6. According gear series can be divided into: single-stage gear pump and multi-stage gear pump.
Gear pump simple structure, convenient processing, small volume, light weight, and has a strong ability to self-suction, not sensitive to oil pollution and other characteristics, so the application is more widely.
China’s gear pump industry has two major competitive advantages: one is to have a low-cost competitive advantage;
On the other hand, the rapid growth of domestic construction, petroleum, petrochemical and environmental protection markets and major water diversion projects also provide important support for the development of China’s gear pump industry.
China’s continuous growth of the market space is the domestic gear pump industry to maintain the advantages of the prerequisite.
However, the radial force imbalance, flow pulsation, noise, bearing life is short, the parts of the poor interchangeability, wear is not easy to repair, not adjustable displacement and other shortcomings, so that the scope of use of gear pump is limited.
Can not be used as variable pump.
K Series Stainless Steel Gear Pump Characteristics
Characteristics
1. Good self-absorption performance.
2, suction and exhaust direction completely depends on the rotation direction of the pump shaft.
3, the pump flow is not large, continuous, but there is pulsation, noise is large;
The unevenness is related to the number and shape of gears. Helical gear has less unevenness than spur gear, while herringbone gear has less unevenness than helical gear. The less the number of teeth, the greater the unevenness.
4. The theoretical flow rate is determined by the size and rotation speed of the working parts, and has nothing to do with discharge pressure;
The discharge pressure is related to the load pressure.
5, simple structure, low price, less vulnerable parts (do not need to set suction valve), impact resistance, reliable work, can be directly connected to the motor (do not need to set the reducer).
6, the friction surface, should not send liquid containing solid particles, appropriate to send oil.
Gear Pump Working Principle