Product Introduce
The Double Twin Screw Pump is mainly composed of driving spindle,
driven spindle and synchronous gear that is fixed on. Every
spindle has a rotating screw sleeve that the direction of rotation
is contrary, the driving spindle conveys power to the driven
spindle by synchronous gear, so the rotating screw sleeve that was
fixed on the driving and driven spindle has no metallic contact.
When the pump is working, the rotating screw sleeve and pump body
or bushing make a closed constant volume. The fluid medium
that is sucked in from the inlet flange flows respectively to the
number two side of the screw sleeve. It then comes into
the closed volume and is sent to the middle of the pump while the
pump is working. The fluid is then transported to the outlet
side of the pump and through the outlet flange to the connecting
pipe. Product Features
Adopted synchronous gear: there is no metallic contact between
rotating parts, there is an external bearing that is lubricated
seperately. The bearing or the lubrication are not influenced
by the medium, so the range of medium that can be transported is
large. The pump is able to transport all kinds of fluid
medium including low viscosity, high viscosity, lubricity and
non-lubricity etc.
The pump body is two layer structure: it can heat and incubate the
medium quickly and fully by using hot stream or heat-conduction
oil.
The transported medium can only do a continual axial motion within
the pump, delivery is calm and balanced. The pump is able to
transport steadily and consistently to ensure that the performance
of medium and structure will not change.
Different methods of heat control can be selected for the bearing
and gear in a low or high temperature environment to prolong the
life of the gear and bearing. It can use water to cool
(reaching a maximum working temperature of 250 degrees) to avoid
rigidity insufficiency, structure intricacy, and high cost related
to the low life when using a long spindle.
Individual safe-valve structure: This gives the customer the
freedom to select whether to fix a problem according to the work
demand.
The special conduit ensures that the pump has high self-suction
ability and lower NPSHr and can deliver the liquid with a certain
proportional gas.
When the pump is working, there is no contact between the screw
sleeve and the bushing this can allow dry running for a short time
(≤2 minutes).
The costumer also has the option to change the speed of the pump to
adjust the output pressure and keep flow steady.
The direction of the flow of the medium can also be changed if need
be.
Structure simplicity: this product has a fast and easy assembly and
disassembly. Field of Application
Oil industryall kinds of lubricant oil, hydraulic oil, heavy oil,
residue oil, crude oil and diesel oil .
Chemical industryall kinds of acid, alkali, salt, resin, glycerol,
paraffin and other chemical raw material.
Paint industry :printing ink, all kinds of paint, pigment, primer
etc..
Food industryalcohol, spirits, honey, syrup, toothpaste, milk,
cream, soy, animal and vegetable oil etc.
Construction industry: all kinds of heavy oil, residue oil, coal
tar oil etc. Technology Parameter
1、delivery：10---800m3/h
2、working pressure：≤2.0MP
3、speed：950 rpm 1450rpm
4、working temperature：-20---250℃
5、viscosity：2---100000mm2/s
6、the high of suction：≤8m
Code specification
HW100—40SZ direction of inlet and outlet type of cooling Type of cooling specification :
When the working temperature is less than 120 degreesselect natural
cooling(standard model)
When the working temperature is more than 120°and less than 140°,we
suggest using gill cooling to cool gear case
When the working temperature is more than 140°, we suggest using
cooling water to cool gear case and bearing housing. Notice Of Selecting Pump Setting
Firstly to understand the practical working parameters, such as:
flux, pressure, medium, working temperature and viscosity.
According to the viscosity of medium at working temperature, select
the speed, usually when ≤300mm2/s, it is right to select
n=1450r/min, when≥300mm2/s, please take care to consider essential
cavitation remainder, avoid bringing the pump to a vibration.
From the pumps performance table, firstly to choose the setting to
best suit the needed delivery and pressure.
From the cavitation remainder table, find out the essential
cavitation remainder ＆#118alue according to the size, speed,
viscosity.
After selection, the foundation will be designed depending on the
outline of pump a |
