MH - 2 and 2 B series of high vacuum energy-conserving vacuum
pumps
MH-2
Series of vacuum pumps are high vacuum suction pump, and the oil-sealing slide
valve, which can reach the vacuum below 1.33 Pa, so it is suitable for all
kinds of high vacuum requirements.
The mechanical system of the pump is introduced from the advanced international
techniques. It adopts the world advanced movement technology-Rotating
compressed air principle combined with Rots Principle (oil sputtering
lubrication) and Newton Law of Inertia and it uses the two-stage double cooling
and lubrication. The power is only half of that used by W series (Return Pump)
and X series (Blade Pump), so it is highly stable and reliable and it has low
noise, small power and long life and so on.
The main parts are made of casting iron with high resistance, and it is
processed after the surface treatment and is made once, so it has the quality
of high accuracy, low erosion, and little maintenance and so on. This pump is
applied to the dye chemistry, food addictives, colorants, paint, medicine and
fine chemistry and other industries. The pump is recognized as the excellent one in the country.
II. The patterns and technical parameters of the product
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III. Structure and Working Principle
MH-2 Series of vacuum pumps have the similar appearance and basic structure.
The pump is moved by the triangle belt from the motor to the pump rotor. The
motor is fixed on the body of the pump by the motor board. The pump is made up
of the main part, the valve, the semi-circle valve slide, the ail-exhaust valve
and the axle and so on.
The main part of the pump is fixed with a valve cover in which there is an
eccentric sheave. The eccentric sheave is fixed on the axle, and the valve
cover is connected with a rectangle valve pole, which can slide up and down or
left and right in the semi-circle valve slide. This kind of pump body is
divided into Room A and Room B by the valve cover and the valve pole. When the
pump is operated, the volume of Room A and Room B is variable periodically, so
it can finish the processes of air-absorption and air-exhaust.
IV. Installation and adjustment
1. The diagram of installation
Note: 
(1) The size of the buffer pot should depend on the
practical condition and the size of the bowel.
(2) Here is a fixing pump, and the size of the valve is decided according to
the pattern of the vacuum pump.
(3) 1# buffer pot can be filled with the alkali and the acid to counteract.
2. The size of installation
Ps: MH-2 Series of vacuum pump fixing size (mm)
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Pattern Parameter
Item |
Foot Size |
Boy-bolt |
The diameter of the
air entrance and air exhaust |
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|
Length |
Width |
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|
MH-2/50 |
455 |
230 |
14��4 |
60 |
|
MH-2/80 |
610 |
214 |
14��4 |
75 |
|
MH-2/100 |
750 |
240 |
16��4 |
90 |
|
MH-2/150 |
750 |
315 |
16��4 |
115 |
|
MH-2/200 |
750 |
315 |
16��4 |
115 |
3. The vacuum pump should be installed in a
clean, airy and bright room and the temperature should be kept between 5 and
4. The installation foundation: the pump can be fixed on the iron and steel
concrete or on the fixed H-steel. There should be about
5. The pump should be adjusted when it is installed and then the foot screw
should be tightened.
6. When the vacuum pipe is fixed, it should be cleaned in advance, in case that
the broken pieces or bits should be absorbed into the pump and cause damage.
7. The diameter of the air-absorption pipe should be no smaller than that of
the pump, and the pipe should be short and has fewer connections or it will affect
the exhaust rate. The air leakage should be controlled to the minimum on the
connection and the pipe. Besides, please note that the air quantity of the
exhaust container should be consistent with the exhaust rate of the pump.
8. The diameter of the air-exhaust pipe should be no smaller than that of the
pump. The exit pipe can be connected to the outside and the exit should be put
downward in case that the rain or other things get into the pipe. It is
suggested that a collector of water and oil mixture should be installed for the
sake of environment protection. The separation of the water and the oil can be
carried out for the collected mixture and the oil can be still used for the
pump.
9. The oil entrance and the oil exit of the pump should conform to those of the
outside oil tank and the outside oil tank must be installed. The oil exit of
the pump should be higher than the outside oil tank level to avoid the damage
caused by the influent oil movement. The oil tank can be got from our factory,
but it can also be designed yourself.
10. The mains can be fixed according to the requirements of the instructions of
the voltage and the connecting ways on the motor signs. It is suggested that an
insurance device be fixed to avoid the over current. The rotation direction of
the motor should be consistent with the rotation direction of the pump.
11. The water cooling pipe is mingled with the main part of the pump and when
the cooling pipe is connected, the temperature of the water flow should be
controlled below
12. Adjustment
(1) Check all the connectives and the tightening conditions before operation,
check the electricity and check whether the cooling pipe is smooth or not.
(2) Rotate the belt with hands to check whether the movement is normal or not.
Do not switch on the motor directly in case of damage.
(3) Turn on the empty valve on the entrance pipe.
(4) Turn on the cooling pipe to see whether it is smooth or not.
(5) Switch on the motor and please note that the movement direction should be
consistent with the direction of the pump movement.
(6) Turn off the empty valve, and not the oil level and the cooling water. Note
whether the rotation direction of the pump is normal or not, whether it has
unnatural sound and whether the motor is going on negative load.
(7) Turn on the air-entrance valve slowly and note whether the vacuum meter is
pointing to the right working pressure.
(8) Stop operation: when stopping operation, the air-entrance valve to the
vacuum system should be shut down first, so it is separated with the vacuum
system. And then the motor should be shut down, and open the empty valve to let
in the air and finally stop the cooling water.
IV. Failure Analysis and Removal
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The trouble |
The reason |
Get rid of the method
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The vacuity is not
high |
The oil is polluted |
Change the oil of
pump of new vacuum |
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Leak gas airtightly |
Change the axle end airtightly |
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Exhaust valve work |
Repair and exhaust
the valve. Or change the new valve, valve slice |
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There is atmosphere
that leaks and enter |
Check the vacuum
pipeline, repair the position of leaking gas |
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Here are incidentals
or pump parts that are damaged in the pump body |
Turn on the pump
body, remove incidentals, overhaul and deal with |
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The pump has unusual
noise and violent vibration |
The foundation is not
firm |
Strengthen the
foundation |
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The spare part is
become flexible or damage |
Check maintenance |
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Exhaust valve work
abnormally |
Check and exhaust the
valve, adjust |
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The foreign matter
falls into the pump |
Remove foreign
matte\= |
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The bearing is worn and
tear or lubricate badly |
Check the lubricating
system , change the bearing |
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Leak gas seriously |
The position is
repaired to check and leak gas |
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Rotate the obstacle |
Or the fuse fuses
electrical machinery |
Find out the reason,
change the fuse |
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There are foreign
matters that are blocked |
Remove foreign
matters |
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Have not reached the
normal rotational speed |
Check trigonometries and take to cross loose and changes in
time |
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The voltage is
crossed low, move the direction of rotating |
Adjust the voltage,
adjust and move the direction of rotating |
Easy
to decrease one
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Serial number |
The name of part |
The quantity of
each one |
|
1 |
Big set |
1 |
|
2 |
Partial |
1 |
|
3 |
The slide |
1 |
|
4 |
Slippery roller |
2 |
|
5 |
Valve slice |
3 or 4 |
|
6 |
Air bleeding
valve spring |
3 or 4 |
|
7 |
Air bleeding valve
seat |
3 or 4 |
����Points for attention
1��Release angry to contain steams is can have been in
front of air inlet according to installing the desicator
completely, It installs inside and oxidize phosphoruses,
oxidize aluminium, calcium chlorides at three at five
or cold traps install the dry ice inside, Used for absorbing or freezing the
moisture content in the gas.
2��If it is too high to pump gas temperature, should
consider that set up condensers or the cooling tower in front of the air inlet
, Make gas temperature reduce, is close to the normal atmospheric temperature.
3��Release gas contain or oil get up corrosivity
chemical reaction at the composition, Should set up the gas and absorb with the
neutralization device in front of the air inlet .
4��Change the oil of pump of vacuum regularly, is
polluted going bad such as the oil, should transfer to the oil in time , Forbid
using and including the engine oil of sulphur, can
select the domestic 1#'s vacuum oil of pump for use . Also the available 46#'s
machinery oil is replaced in winter.
5��Should put the cooling water to the limit when the
room temperature is lower than
The enclosure is explained:
There are profit collector of pump of vacuum(
complements the collecting machine) and other fuel tank supply in our factory.
According to mounted on gas vent collector profit, the profit collected can
retrieve in the fuel tank directly , Water and filth are discharged since blowdown in the mouth, the oil can continue being used ,
easy to save the oil consumption. This complements collecting machine it is
that the department of environmental protection recommends the products in
addition, pollution-free, have no noise, The user can select for use by oneself .
For external use fuel tanks complement user designs and makes person who
collect by oneself.