Vofcit Pump Industry
News Center
02
2023
-
06
Features of internal gear pumps
Author：
Compared with the external gear pump, the internal gear pump mainly has the advantages of small size, small flow pulsation and low noise, but the processing is difficult and the use is limited. The tooth surface contact line at the meshing point here has always played the role of separating the high and low pressure cavities, so there is no need to set up a special flow distribution mechanism in the gear pump.
The characteristics of gear pump are: small size, light weight, simple structure, convenient manufacturing, low price, reliable work, good self-priming performance, insensitive to oil pollution, convenient maintenance, etc.
Its disadvantages are: large flow and pressure pulsation, large noise, immutable displacement, etc.
1. The characteristics of gear pump are the flow rate of external gear pump
Displacement: V=DHB=2M2ZB
In fact, the volume of the interdental groove is slightly larger than the volume of the tooth, so usually take 3.33, then v=6.66zm2b
Flow: q=VNV=6.66ZM2bnv
The above calculation is the average flow rate of the external gear pump.
There are many things to pay attention to in gear pumps, let's take a look at them.
1. The oil absorption height of the pump shall not be greater than 0.5m.
2. The transmission device should ensure that the force of the active shaft of the pump is within the allowable range.
3. The working oil should be selected in strict accordance with the regulations, and the working temperature range is –20~80 °C.
Latest News
2023-06-02
Maintenance process of internal gear pump
The transmission gears of the internal gear pump generally have straight teeth, bevel teeth, herringbone teeth, helical teeth, and tooth profile keys have involute gears and arc gears. Generally speaking, small and medium-sized gear pumps mostly use involute gear spur gears, high-temperature gear pumps commonly use displacement gears, and low viscosity, polymer dissolved melt pumps commonly use involute gear bevel gears.
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Internal gear pump, do you understand?
The structure of the internal gear pump has the characteristics of simple, convenient processing, small size, light weight, strong self-absorption capacity, and insensitivity to oil pollution, and is widely used. China's gear pump industry has two major competitive advantages, on the one hand, it has the competitive advantage of low cost; At the same time, the rapid growth of domestic construction, petroleum, petrochemical and environmental protection markets and major water transfer projects have also provided important support for the development of China's gear pump industry.
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The structure of the internal gear pump
The internal gear pump is a gear pump with special acid resistance and wear resistance. Its characteristics are: install the active shaft and the ordinary attack shaft on the shell, install the transmission fish on a section where the active shaft is located in the shell, install the transmission fish meshing with the transmission fish teeth on the ordinary attack shaft, make a pair of transmission fish, set the inlet and outlet of raw materials on the shell, and set ceramic fiberboard on the inner cavity of the transmission fish pair under the cover content. The equipment improves the acid resistance and wear resistance of the gear pump according to the change of gear pump structure.
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The working principle and maintenance method of the internal gear pump
Internal gear pumps are widely used in petroleum, chemical, shipbuilding, electric power, grain, petroleum, food, medical, building materials, metallurgy and defense research industries. Internal gear pump is through a pair of parameters and structure of the same involute gear rolling meshing, the tank in the low pressure oil to the operable high pressure oil important components, which is the engine mechanical energy into hydraulic energy power unit, today to introduce to you the internal gear pump working principle and maintenance method.
2023-06-02
Classification, characteristics and applications of gear pumps
Gear pumps are generally divided into external meshing type (external gear pump) and internal meshing type (internal gear pump) according to the configuration mode of the meshing pair, and the internal gear pump includes a cycloid gear pump with a special tooth shape.