The ventilator installation
1 scope
The technology standard is applicable to air pressure is lower than 3 kpa (300 mmh2o material) within the scope of the low pressure centrifugal or axial flow fan, and equivalent principle of each type of fan.
2 construction preparation
2.1 material and main equipments:
2.1.1 ventilation, air conditioning, used by the fan installed in the main material, finished or semi-finished products shall have the factory certificate or qualification documents.
2.1.2 fan the crates, pulley, belts, motor slide rail and anchor bolt is all ready, comply with the design requirements. With and without defects, and so on and so forth.
2.1.3 fan bearing cleaning, filling lubricant viscosity should comply with the design requirements, should not use metamorphism or lubricant containing impurities.
2.1.4 perfusion, the anchor bolt should be used with concrete foundation concrete grade, cement perfusion failure of must never be used.
2.1.5 chain hoist, pulley, ropes, crowbar, adjustable wrench, hammer, combination pliers, screwdriver, level drops, steel tape, steel tape, wire, flat car, high stool, electric hammer, oil drum, brushes, cotton, cotton silk, etc.
2.2 operation conditions:
2.2.1 environment on the construction site, in addition to the room decorate and ground unfinished, basic meet installation conditions.
2.2.2 fan installation should be carried out in accordance with the design requirements, and the builder written disclosure quality, technology and safety.
3 operation process
3.1 process:
Basic acceptance to unpacking inspection to handling, cleaning, installation, leveling and alignment, test run, check acceptance
3.2 basis of acceptance
3.2.1 fan before installation should be according to the design drawings of equipment foundation to conduct a comprehensive inspection, whether conform to the requirements of the size.
3.2.2 fan before the installation, should be shoveled pits in the surface of foundation, in order to make the secondary water of concrete or cement mortar can be closely integrated with the base.
3.3 the ventilator unpacking inspection shall meet the following requirements:
3.3.1 according to equipment packing list, check the impeller, casing and other parts of the main dimensions, the location of the inlet and outlet direction meets the design requirements, completes the inspection records.
3.3.2 rainfall distribution on 10-12 impeller rotation direction should comply with the provisions of the equipment technical documents.
3.3.3 inlet and outlet should be tight cover cover. Check the cutting surface, whether chassis antirust and rotor deformation or corrosion, touch damage, etc.
3.3.4 fan equipment handling should use tools and rope rigger specialist command must meet the safety requirements.
3.5 equipment cleaning:
Before 3.5.1 track of fan equipment installation, bearings, transmission parts and regulating mechanism of disassembly, cleaning, assembly after rotation, flexible adjustment.
3.5.2 use kerosene or gasoline cleaning bearing no smoking or use fire, in case of fire.
3.6 the fan installation:
3.6.1 fan before equipment installation in place, according to the design drawing according to the axis of the building, border line and elevation line release installation datum. Clear the equipment based on the surface of grease, dirt, debris and anchor bolt hole inside the clear out clutter.
3.6.2 the overall installation of the fan, moving and lifting ropes shall not be bound in the rotor and the casing or bearing cover of rings.
3.6.3 whole installing a fan assembly placed directly on the basis, using the shim leveling to look is, pad iron should be put in on both sides of anchor bolt, tilting pad iron must be used in pairs. Equipment installed after the same group of shim should be spot-welded together, in order to avoid stress when is loose.
3.6.4 radar echoes captured the fan installed on the no shock absorber bracket, rubber pad should be 4 ~ 5 mm thick, after leveling find is fixed.
3.6.5 fan installed in a shock absorber, stand on the ground to level off, the amount of each shock absorber under the load of compression should be uniform and never be unfair, after installation to take protective measures, to prevent damage. Installed on the suspension frame hoisting way fan as shown in figure 4-33.
3.6.6 fan crankshaft must keep levelness, fan and motor coupling connection, two shaft centerline should be in a straight line.
3.6.7 fan and motor with triangle belt transmission are looking for is, to ensure that the axis of the motor and fan parallel to each other, and make the center line of the two pulley collocated. V belt tensioning degree generally available hand knock has good belt in the middle, will be subject to a slight bounce.
3.6.8 fan and motor pulley installation, the operator should work closely to prevent injury to hands. Don't put a finger into the pulley hanging belt, prevent accidents.
3.6.9 fan exposed portion and the drive of the motor should be installed protective cover, fan inlet, or suction pipe through the atmosphere, should be equipped with protection network, or other safety devices.
3.6.10 fan outlet of air outlet should be meet the bend in the impeller rotation direction. In the case of site conditions allow,
Should guarantee the export to the distance of the bend is greater than or equal to A tuyere export long side size l. 5 ~ 2.5 times (figure 4-34). If the
Site conditions can not meet the requirements, should be in the bent pipe with guide vane make up (see figure 4-35).
3.6.11 fan assembly at the scene, and rope tied shall not damage parts surface, the place such as the rotor, shaft neck and shaft seal should not be regarded as bound. The ventilator hoisting way bulk parts as shown in figure 4-36.
3.6.12 conveying fan rotor and special medium inside the casing, such as coated with protective layer, should be strongly protected, shall not be damaged.
3.6.13 large axial flow fan assembly, the clearance between the impeller and casing should be evenly distributed, and conform to the requirements of the equipment technical documents. Impeller and into the wind shell gap are shown in table 4-34.
3.6.14 fan attached automatic control equipment and observation instrument. Instrument installation, should press equipment technical document regulations.
3.6.15 fan test run; After a thorough inspection manual jigger, supply power phase sequence right rear can send test run, before operation, they must add a moderate amount of lubricating oil. All safety measures and check; Impeller direction of rotation must be correct; Under the rated speed test run time shall not be less than 2 h. After running, check the fan shock absorption basis for displacement and damage phenomenon, make records.
4 quality standards
4.1 ensure projects:
4.4.1 fan impeller with no scratches.
Test method: disc impeller wheel inspection.
4.1.2 bulk fan into the clearance between impeller and ventilator must be uniform and conform to the technical requirements.
Inspection methods: observation check and quantity of the feet.
4.1.3 anchor bolt must be tight, and there are locking devices; Shim placed position must be correct, contact closely, not more than three pieces in each group.
On both sides of the impeller with the principal part of ram corresponding clearance tolerance table 4-34
On both sides of the impeller diameter (mm) corresponding to the clearance should not be more than the difference between the radius size (mm)
600 or less
> 600 ~ 1200
> 1200 ~ 2000
> 2000 ~ 3000
> 3000 ~ 5000
> 5000 ~ 8000
> 0.5 8000
1
1.5
2
3.5
5
6.5
Inspection method: small hammer tap, wrench screw and observe the examination.
4.1.4 test run, the impeller direction of rotation must be correct. By not less than 2 h after operation, sliding bearing temperature rise no more than 35 ℃, the highest temperature does not exceed 70 ℃, rolling bearing temperature rise is not more than 40 ℃, the highest temperature does not exceed 80 ℃.
Inspection method: inspect records or commissioning test run.
4.2 allowable deviation projects:
The ventilator installation and inspection methods shall comply with the allowable deviation table 4-35.
The ventilator installation and test the allowable deviation method table 4-35
Item will allow deviation test method
1 the centerline of the plane displacement of 10 mm theodolite or stay and ruler quantity check
Level 2-10 mm level or water level gauge, ruler, stay and feet quantity check
3 1 mm wide belt pulley wheel center horizontal displacement in the main, driven pulley end face guy, and feet quantity check
4
Drive shaft is spent in the shaft or pulley 0 ° and 180 ° two positions, with level examination
5 coupling concentricity of radial displacement of the 0.05 mm vertical each other in the coupling of the four position, with the percentage
The axial tilt table 0.2/1000 inspection
5 finished product protection
5.1 the overall installation of the fan, moving and lifting. Contact with the casing side of rope, at edges and corners should be good soft material, to prevent wear casing and the rope is cut off.
5.2 the collapse of the installation of the fan, ropes can't damage the shaft. The surface of the bushing and housing, impeller and other components.
5.3 the fan move, should not be directly on the ground rolling gear shaft and impeller or mobile.
5.4 the fan into the exhaust pipe, valve parts, adjusting device should have a separate support; Various pipe connected to the fan, the flange surface stick flat in response, the device should not be hard to pull force. Fan installed, should not bear the weight of the other parts.
6 should pay attention to quality problems
6.1 the fan belt slide down during operation or produce. Should check whether the two pulley alignment and on a line, or adjust the distance of two pulley; As the long belt should be replaced.
6.2 the fan produce accords with the rotational speed of vibration. Should check whether the weight of impeller is symmetry, or whether have attachments on blade; Double into the ventilator should check whether a volume equal on both sides. Such as range, adjustable damper, make the air inlet negative pressure on both sides are equal.
6.3 the overall vibration fan and motor. Whether should check whether the anchor bolt is loose, stand fastening; Connected to a ventilator duct whether add support fixed; Flexible short tube is too tight.
After 6.4 fan bearing made of steel, welding should guarantee the bearing flat, if there is distortion, correction can well before the installation.
6.5 the fan uneven stress shock absorber. Should adjust the location of the shock absorber, or check whether the shock absorber plate with fixed.
7 quality records
7.1 the ventilator installation quality inspection evaluation form.
7.2 play equipment inspection record.
7.3 preview engineering inspection record sheet.
7.4 equipment foundation project acceptance record.
7.5 the general ventilation system commissioning records.
7.6 unit engineering visual quality evaluation table.
7.7 acceptance record in the middle.
7.8 self-check mutual inspection records.
1 scope
The technology standard is applicable to air pressure is lower than 3 kpa (300 mmh2o material) within the scope of the low pressure centrifugal or axial flow fan, and equivalent principle of each type of fan.
2 construction preparation
2.1 material and main equipments:
2.1.1 ventilation, air conditioning, used by the fan installed in the main material, finished or semi-finished products shall have the factory certificate or qualification documents.
2.1.2 fan the crates, pulley, belts, motor slide rail and anchor bolt is all ready, comply with the design requirements. With and without defects, and so on and so forth.
2.1.3 fan bearing cleaning, filling lubricant viscosity should comply with the design requirements, should not use metamorphism or lubricant containing impurities.
2.1.4 perfusion, the anchor bolt should be used with concrete foundation concrete grade, cement perfusion failure of must never be used.
2.1.5 chain hoist, pulley, ropes, crowbar, adjustable wrench, hammer, combination pliers, screwdriver, level drops, steel tape, steel tape, wire, flat car, high stool, electric hammer, oil drum, brushes, cotton, cotton silk, etc.
2.2 operation conditions:
2.2.1 environment on the construction site, in addition to the room decorate and ground unfinished, basic meet installation conditions.
2.2.2 fan installation should be carried out in accordance with the design requirements, and the builder written disclosure quality, technology and safety.
3 operation process
3.1 process:
Basic acceptance to unpacking inspection to handling, cleaning, installation, leveling and alignment, test run, check acceptance
3.2 basis of acceptance
3.2.1 fan before installation should be according to the design drawings of equipment foundation to conduct a comprehensive inspection, whether conform to the requirements of the size.
3.2.2 fan before the installation, should be shoveled pits in the surface of foundation, in order to make the secondary water of concrete or cement mortar can be closely integrated with the base.
3.3 the ventilator unpacking inspection shall meet the following requirements:
3.3.1 according to equipment packing list, check the impeller, casing and other parts of the main dimensions, the location of the inlet and outlet direction meets the design requirements, completes the inspection records.
3.3.2 rainfall distribution on 10-12 impeller rotation direction should comply with the provisions of the equipment technical documents.
3.3.3 inlet and outlet should be tight cover cover. Check the cutting surface, whether chassis antirust and rotor deformation or corrosion, touch damage, etc.
3.3.4 fan equipment handling should use tools and rope rigger specialist command must meet the safety requirements.
3.5 equipment cleaning:
Before 3.5.1 track of fan equipment installation, bearings, transmission parts and regulating mechanism of disassembly, cleaning, assembly after rotation, flexible adjustment.
3.5.2 use kerosene or gasoline cleaning bearing no smoking or use fire, in case of fire.
3.6 the fan installation:
3.6.1 fan before equipment installation in place, according to the design drawing according to the axis of the building, border line and elevation line release installation datum. Clear the equipment based on the surface of grease, dirt, debris and anchor bolt hole inside the clear out clutter.
3.6.2 the overall installation of the fan, moving and lifting ropes shall not be bound in the rotor and the casing or bearing cover of rings.
3.6.3 whole installing a fan assembly placed directly on the basis, using the shim leveling to look is, pad iron should be put in on both sides of anchor bolt, tilting pad iron must be used in pairs. Equipment installed after the same group of shim should be spot-welded together, in order to avoid stress when is loose.
3.6.4 radar echoes captured the fan installed on the no shock absorber bracket, rubber pad should be 4 ~ 5 mm thick, after leveling find is fixed.
3.6.5 fan installed in a shock absorber, stand on the ground to level off, the amount of each shock absorber under the load of compression should be uniform and never be unfair, after installation to take protective measures, to prevent damage. Installed on the suspension frame hoisting way fan as shown in figure 4-33.
3.6.6 fan crankshaft must keep levelness, fan and motor coupling connection, two shaft centerline should be in a straight line.
3.6.7 fan and motor with triangle belt transmission are looking for is, to ensure that the axis of the motor and fan parallel to each other, and make the center line of the two pulley collocated. V belt tensioning degree generally available hand knock has good belt in the middle, will be subject to a slight bounce.
3.6.8 fan and motor pulley installation, the operator should work closely to prevent injury to hands. Don't put a finger into the pulley hanging belt, prevent accidents.
3.6.9 fan exposed portion and the drive of the motor should be installed protective cover, fan inlet, or suction pipe through the atmosphere, should be equipped with protection network, or other safety devices.
3.6.10 fan outlet of air outlet should be meet the bend in the impeller rotation direction. In the case of site conditions allow,
Should guarantee the export to the distance of the bend is greater than or equal to A tuyere export long side size l. 5 ~ 2.5 times (figure 4-34). If the
Site conditions can not meet the requirements, should be in the bent pipe with guide vane make up (see figure 4-35).
3.6.11 fan assembly at the scene, and rope tied shall not damage parts surface, the place such as the rotor, shaft neck and shaft seal should not be regarded as bound. The ventilator hoisting way bulk parts as shown in figure 4-36.
3.6.12 conveying fan rotor and special medium inside the casing, such as coated with protective layer, should be strongly protected, shall not be damaged.
3.6.13 large axial flow fan assembly, the clearance between the impeller and casing should be evenly distributed, and conform to the requirements of the equipment technical documents. Impeller and into the wind shell gap are shown in table 4-34.
3.6.14 fan attached automatic control equipment and observation instrument. Instrument installation, should press equipment technical document regulations.
3.6.15 fan test run; After a thorough inspection manual jigger, supply power phase sequence right rear can send test run, before operation, they must add a moderate amount of lubricating oil. All safety measures and check; Impeller direction of rotation must be correct; Under the rated speed test run time shall not be less than 2 h. After running, check the fan shock absorption basis for displacement and damage phenomenon, make records.
4 quality standards
4.1 ensure projects:
4.4.1 fan impeller with no scratches.
Test method: disc impeller wheel inspection.
4.1.2 bulk fan into the clearance between impeller and ventilator must be uniform and conform to the technical requirements.
Inspection methods: observation check and quantity of the feet.
4.1.3 anchor bolt must be tight, and there are locking devices; Shim placed position must be correct, contact closely, not more than three pieces in each group.
On both sides of the impeller with the principal part of ram corresponding clearance tolerance table 4-34
On both sides of the impeller diameter (mm) corresponding to the clearance should not be more than the difference between the radius size (mm)
600 or less
> 600 ~ 1200
> 1200 ~ 2000
> 2000 ~ 3000
> 3000 ~ 5000
> 5000 ~ 8000
> 0.5 8000
1
1.5
2
3.5
5
6.5
Inspection method: small hammer tap, wrench screw and observe the examination.
4.1.4 test run, the impeller direction of rotation must be correct. By not less than 2 h after operation, sliding bearing temperature rise no more than 35 ℃, the highest temperature does not exceed 70 ℃, rolling bearing temperature rise is not more than 40 ℃, the highest temperature does not exceed 80 ℃.
Inspection method: inspect records or commissioning test run.
4.2 allowable deviation projects:
The ventilator installation and inspection methods shall comply with the allowable deviation table 4-35.
The ventilator installation and test the allowable deviation method table 4-35
Item will allow deviation test method
1 the centerline of the plane displacement of 10 mm theodolite or stay and ruler quantity check
Level 2-10 mm level or water level gauge, ruler, stay and feet quantity check
3 1 mm wide belt pulley wheel center horizontal displacement in the main, driven pulley end face guy, and feet quantity check
4
Drive shaft is spent in the shaft or pulley 0 ° and 180 ° two positions, with level examination
5 coupling concentricity of radial displacement of the 0.05 mm vertical each other in the coupling of the four position, with the percentage
The axial tilt table 0.2/1000 inspection
5 finished product protection
5.1 the overall installation of the fan, moving and lifting. Contact with the casing side of rope, at edges and corners should be good soft material, to prevent wear casing and the rope is cut off.
5.2 the collapse of the installation of the fan, ropes can't damage the shaft. The surface of the bushing and housing, impeller and other components.
5.3 the fan move, should not be directly on the ground rolling gear shaft and impeller or mobile.
5.4 the fan into the exhaust pipe, valve parts, adjusting device should have a separate support; Various pipe connected to the fan, the flange surface stick flat in response, the device should not be hard to pull force. Fan installed, should not bear the weight of the other parts.
6 should pay attention to quality problems
6.1 the fan belt slide down during operation or produce. Should check whether the two pulley alignment and on a line, or adjust the distance of two pulley; As the long belt should be replaced.
6.2 the fan produce accords with the rotational speed of vibration. Should check whether the weight of impeller is symmetry, or whether have attachments on blade; Double into the ventilator should check whether a volume equal on both sides. Such as range, adjustable damper, make the air inlet negative pressure on both sides are equal.
6.3 the overall vibration fan and motor. Whether should check whether the anchor bolt is loose, stand fastening; Connected to a ventilator duct whether add support fixed; Flexible short tube is too tight.
After 6.4 fan bearing made of steel, welding should guarantee the bearing flat, if there is distortion, correction can well before the installation.
6.5 the fan uneven stress shock absorber. Should adjust the location of the shock absorber, or check whether the shock absorber plate with fixed.
7 quality records
7.1 the ventilator installation quality inspection evaluation form.
7.2 play equipment inspection record.
7.3 preview engineering inspection record sheet.
7.4 equipment foundation project acceptance record.
7.5 the general ventilation system commissioning records.
7.6 unit engineering visual quality evaluation table.
7.7 acceptance record in the middle.
7.8 self-check mutual inspection records.
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