ZJQSeries

2017-03-25
service content:


Introduction:
Air cooled roots vacuum pump is based on common vacuum pump, with the addition of bypass gas cooling system. The external cooler make the gas auto recycling to cool down the rotor and casing, and the cooled gas flows into suction cavity from casing two sides, this will avoid overheating of the casing caused by gas compression and make reliable, enduring operation in high differential pressure and high compression ratio, with no influence on pump performance. The pump can be used single or in multi series, or combine with liquid ring pump or common roots pump into units to get high vacuum for various process.  



 

 

 

       Working principle:

ZJQ series air cooled roots pump structure is as shown in the figure: two rotors (two blades or more) in the pump chamber are installed on a pair of parallel shaft, and driven by two wheel gears with 1:1 transmission ratio and make opposite rotation. The two rotors, rotors and inner surface of the casing remain a certain gap, this is benefit for fast rotation. Different with ZJ series common roots pumps, ZJQ series are designed with a reflux port on the side of the casing, this is used to introduce the cooled gas into pump chamber to cool down rotor, so the rotor temperature will be kept within limits, and ZJL pumps can stand higher differential pressure (as high as 90kPa) without overheating.


Features:
They can be used alone or in series, or connected with liquid ring pumps.
Vacuum degree reaches 150mbar when it is direct discharged into air
Medium vacuum can be realized by connecting in series or with liquid ring vacuum pump.
Special structure helps to avoid overheating and overloading in high differential pressure and compression ratio.
The dynamic balance test and high precision process machine insure the smooth and quiet running of the product.
The balanced mechanical seal makes better sealing effect for the pump.
The chamber is oil free, so the pump is suitable to extract common or various special gases.
More energy saving compared with other mechanical vacuum pumps.
 

Main parameters of air cooled roots pump

Model

Max. speed
(L/s)

Max. Speed m3/h

Ultimate pressure
(Pa)

Rotate speed
(r/min)

Inlet port diameter
(mm)

Outlet port diameter (mm)

Motor power
(kW)

Weight
(kg)

ZJL-70

70

252

15000

2900

80

50

1.5~7.5

190

ZJL-150

150

540

13000

1450

100

80

3~18.5

270

ZJL-300

300

1080

13000

2900

150

100

5.5~37

400

ZJL-600

600

2160

13000

1450

200

150

7.5~75

700

ZJL-1200

1200

4230

13000

1450

250

200

11~132

1200

ZJL-2500

2500

9000

13000

980

350

300

18.5~250

3000

ZJL-3750

3750

13500

13000

1450

350

300

37~350

3000

 

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NOTE:
Motor power and cooler area are decided by differential pressure; different differential pressure accord with different motor and cooler.
The limit pressure in the table indicates the value when the pump is discharged directly into air; when connected with backing pump, its limit value is the same with ZJ series roots pump, this may refer to the limit value of corresponding roots pump unit. 

 
 

 

外形尺寸图:

 

 

 

 

型号 D D1 D2 d d1 d2 K n-K1 n-K2 ФS
ZJQ300 150 200 225 80 125 145 20 8-M10 4-M8 Ф 48h6
ZJQ600 200 260 285 100 145 170 22 12-M10 4-M10 Ф 58h6
ZJQ1200 250 310 335 150 200 225 24 12-M10 8-M10 Ф 75h6
ZJQ1800 320 395 425 150 200 225 28 12-M12 8-M10 Ф 90h6
ZJQ2500 320 395 425 150 200 225 28 12-M12 8-M10 Ф 90h6
ZJQ3750 400 480 510 200 260 285 35 16-M12 12-M10 Ф 100h6
ZJQ5000 400 480 510 200 260 285 35 16-M12 12-M10 Ф 100h6

 

型号 L L1 L2 L3 L4 H H1 H2 H3 H4 W W1 W2
ZJQ300 304 479 386 110 80 390 30 20 210 140 480 420 245
ZJQ600 380 540 462 135 94 470 40 25 255 175 580 520 310
ZJQ1200 480 649 523 180 110 560 50 25 305 225 710 620 365
ZJQ1800 440 691 543 150 140 700 60 30 380 285 900 800 460
ZJQ2500 600 771 623 230 140 700 60 30 380 285 900 800 460
ZJQ3750 580 812 653 225 170 860 60 35 460 340 1120 1000 570
ZJQ5000 780 912 753 315 170 860 60 35 460 340 1120 1000 570

 

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