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～～Title: Support and service for you～～ |
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| The operation is the result of the breakdown | | Breakdown phenomenon | Breakdown reasons | Improvement measures | | Gland too heat | Too large pressure ratio of faces
Contacting of Static assembly and rotation assembly
The assembling inclination
Too big amount of spring impression | Adjustment the impression according to seal assembly drawing size request
Adjustment the installs precision reasonable (the metal surface
which contacts with the seal packing collar, takes rubber Ra=1.25~2.5µm & to the PTFE is smaller than Ra=0.63~1.25µm ), The proper alignment (when axle diameter is 10~130mm) is 20~30µm, the verticality (when the axle diameter is 20-120mm )is d/120 (d is axle diameter), when makes the seal packing collar with the synthetic rubber is 1/250, when uses the teflon to make the seal packing collar is 1/500
Install according to the assembling specifications strictly.
| | Face leakage | Too small pressure ratio of faces
The assembling inclination
The strength of twist the screw is non-uniformity
Too small amount of spring impression
| Adjustment the impression according to seal assembly drawing size request
Reinstall, carefully adjust the assemble position | | Power rise | Too roughness of the face
Contacting of Static assembly and rotation assembly
Too large pressure ratio of faces
The face not clean enough
Too big amount of spring impression | Grinding the face again, assemble after the micrometer adjust
Adjustment the impression according to seal assembly drawing size request
Reinstall, carefully adjust the assemble position | | Fume | Too big amount of spring impression
Contacting of Static assembly and rotation assembly
Installation misalignment
The assembling inclination | Adjustment the impression according to seal assembly drawing size request
Adjustment the installs precision reasonable (the metal surface
which contacts with the seal packing collar, takes rubber Ra=1.25~2.5µm & to the PTFE is smaller than Ra=0.63~1.25µm ), The proper alignment (when axle diameter is 10~130mm) is 20~30µm, the verticality (when the axle diameter is 20-120mm )is d/120 (d is axle diameter), when makes the seal packing collar with the synthetic rubber is 1/250, when uses the teflon to make the seal packing collar is 1/500
| | The face sound and fume | Too big amount of spring impression
Contacting of Static assembly and rotation assembly
Installation misalignment
The assembling inclination | Adjustment the impression according to seal assembly drawing size request
Adjustment the installs precision reasonable (the metal surface
which contacts with the seal packing collar, takes rubber Ra=1.25~2.5µm & to the PTFE is smaller than Ra=0.63~1.25µm ), The proper alignment (when axle diameter is 10~130mm) is 20~30µm, the verticality (when the axle diameter is 20-120mm )is d/120 (d is axle diameter), when makes the seal packing collar with the synthetic rubber is 1/250, when uses the teflon to make the seal packing collar is 1/500
| | Unusual vibration | Too big amount of spring impression
Contacting of Static assembly and rotation assembly
Installation misalignment
The assembling inclination | Adjustment the impression according to seal assembly drawing size request
Adjustment the installs precision reasonable (the metal surface
which contacts with the seal packing collar, takes rubber Ra=1.25~2.5µm & to the PTFE is smaller than Ra=0.63~1.25µm ), The proper alignment (when axle diameter is 10~130mm) is 20~30µm, the verticality (when the axle diameter is 20-120mm )is d/120 (d is axle diameter), when makes the seal packing collar with the synthetic rubber is 1/250, when uses the teflon to make the seal packing collar is 1/500
| | Leakage too big | Contacting of Static assembly and rotation assembly
Installation misalignment
The assembling inclination
Damage of seal spare parts | Adjustment the impression according to seal assembly drawing size request
Adjustment the installs precision reasonable (the metal surface
which contacts with the seal packing collar, takes rubber Ra=1.25~2.5µm & to the PTFE is smaller than Ra=0.63~1.25µm ), The proper alignment (when axle diameter is 10~130mm) is 20~30µm, the verticality (when the axle diameter is 20-120mm )is d/120 (d is axle diameter), when makes the seal packing collar with the synthetic rubber is 1/250, when uses the teflon to make the seal packing collar is 1/500
inspect each parts carefully to ensure the installment quality | | Organization destruction | Too big amount of spring impression
Contacting of Static assembly and rotation assembly
Installation misalignment
The assembling inclination
| Adjustment the impression according to seal assembly drawing size request
Adjustment the installs precision reasonable (the metal surface
which contacts with the seal packing collar, takes rubber Ra=1.25~2.5µm & to the PTFE is smaller than Ra=0.63~1.25µm ), The proper alignment (when axle diameter is 10~130mm) is 20~30µm, the verticality (when the axle diameter is 20-120mm )is d/120 (d is axle diameter), when makes the seal packing collar with the synthetic rubber is 1/250, when uses the teflon to make the seal packing collar is 1/500
inspect each parts carefully to ensure the installment quality
| | Vibration Fretting | Too big amount of spring impression
Contacting of Static assembly and rotation assembly
Installation misalignment
The assembling inclination
| Adjustment the impression according to seal assembly drawing size request
Adjustment the installs precision reasonable (the metal surface
which contacts with the seal packing collar, takes rubber Ra=1.25~2.5µm & to the PTFE is smaller than Ra=0.63~1.25µm ), The proper alignment (when axle diameter is 10~130mm) is 20~30µm, the verticality (when the axle diameter is 20-120mm )is d/120 (d is axle diameter), when makes the seal packing collar with the synthetic rubber is 1/250, when uses the teflon to make the seal packing collar is 1/500
Enlarge the gap (in axle diameter is in the 15~200 scope, near the seal packing collar single side clearance is 0.1~0.3 or 0.1~0.5mm,takes minimum value under high pressure). |
| | The mechanical seal installment is the result of the breakdown. | | Breakdown phenomenon | Breakdown reasons | Improvement measures | | Unusual Leakage | Separate the solid material leakage fluid, the medium solidify and stick.
Corrosion\Electrochemical corrosion
Too high speed, too high pressure
Too big vibration, unusual cavitations, surge and bearing
Cavitations, inspiration, exhaustion at the seal with dry friction, negative pressure and idle operation.
Heat shock, quench,
Too big temperature difference
The testing pressure too high or exceed the standard ,reverse pressure
| Installs the filtrating equipment to the medium containing the particles
Taking outside flush for the flushing with the own medium not suitable.
Inspect pumps and seals operational performance, improve the application method
Strengthen the flushing, quench, improve the seal operation environment | | Leakage too big | Separate the solid material leakage fluid, the medium solidify and stick.
Corrosion\Electrochemical corrosion
Pressure fluctuates cavitation,surge
Heat shock, quench,
Too big temperature difference
The testing pressure too high or exceed the standard ,reverse pressure
| Installs the filtrating equipment to the medium containing the particles
Taking outside flush for the flushing with the own medium not suitable.
Inspect pumps and seals operational performance, improve the application method
Strengthen the flushing, quench, improve the seal operation environment | | Power rise | The mediums solidify and stick.
Too high speed, too high pressure
Too big vibration, unusual cavitations, surge and bearing
Cavitations, inspiration, exhaustion at the seal with dry friction, negative pressure and idle operation.
| Installs the filtrating equipment to the medium containing the particles
Taking outside flush for the flushing with the own medium not suitable.
Inspect pumps and seals operational performance, improve the application method
Strengthen the flushing, quench, improve the seal operation environment | | Cannot operating | The material mixed or separates the solid, the medium solidify and stick..
The liquid temperature beyond the lower limit (too cold) | Steam heat preservation, strengthen the flushing | | Seal destroyed | Separate the solid material leakage fluid, the medium solidify and stick.
The medium temperature too high or too low
Corrosion\ Electrochemical corrosion
Block up the flushing, cooling, or the system of pressure reduced pipeline
Too high speed, too high pressure
Too big vibration, unusual cavitations, surge and bearing
Cavitations, inspiration, exhaustion at the seal with dry friction, negative pressure and idle operation.
The seal chamber has not exhausted | Installs the filtrating equipment to the medium containing the particles
Taking outside flush for the flushing with the own medium not suitable.
Inspect pumps and seals operational performance, improve the application method
Strengthen the flushing, quench, improve the seal operation environment | | Corrosion\Electrochemical corrosion | The leakage fluid solidify and deteriorate | Installs the filtrating equipment to the medium containing the particles
Taking outside flush for the flushing with the own medium not suitable.
Inspect pumps and seals operational performance, improve the application method
Strengthen the flushing, quench, improve the seal operation environment | | Gland too heat | Block up the flushing, cooling, or the system of pressure reduced pipeline
Too large pressure ratio of faces
Too high speed, too high pressure
| Reduce the spring quantity or reduce the seal compression suitably
Assemble and adjusting again carefully
Change the structure style of the seal
strengthening the measures of cooling and lubrication
| | Fume | Block up the flushing, cooling, or the system of pressure reduced pipeline
Too high speed, too high pressure
Too big vibration, unusual cavitations, surge and bearing
Cavitations, inspiration, exhaustion at the seal with dry friction, negative pressure and idle operation.
The seal chamber has not exhausted | Reduce the spring quantity or reduce the seal compression suitably
Assemble and adjusting again carefully
Change the structure style of the seal
strengthening the measures of cooling and lubrication
| | Face sounds | Too high speed, too high pressure
Too big vibration, unusual cavitations, surge and bearing
Cavitations, inspiration, exhaustion at the seal with dry friction, negative pressure and idle operation.
The seal chamber has not exhausted | Reduce the seal compression suitably
Assemble and adjusting again, improvement the system structure
Change the structure style of the seal, strengthening the measures of cooling and lubrication
| | Separates massive attrition product | Too high speed, too high pressure
Too big vibration, unusual cavitations, surge and bearing
Cavitations, inspiration, exhaustion at the seal with dry friction, negative pressure and idle operation.
| Reduce the spring quantity or reduce the seal compression suitably
Assemble and adjusting again, improvement the system structure，
Change the structure style of the seal, strengthening the measures of cooling and lubrication
| | Unusual vibration | Too high speed, too high pressure
Too big vibration, unusual cavitations, surge and bearing
Cavitations, inspiration, exhaustion at the seal with dry friction, negative pressure and idle operation.
| Assemble and adjusting again, improvement the system structure
Change the structure style of the seal
| | Seal slips | Too big vibration, unusual cavitations, surge and bearing
Cavitations, inspiration, exhaustion at the seal with dry friction, negative pressure and idle operation.
Pressure fluctuates cavitation,surge
Heat shock, quench
The testing pressure too high or exceed the standard ,reverse pressure
| Assemble and adjusting again, improvement the system structure
Change the structure style of the seal
| | Face split | Block up the flushing, cooling, or the system of pressure reduced pipeline
Too high speed, too high pressure
Too big vibration, unusual cavitations, surge and bearing
Cavitations, inspiration, exhaustion at the seal with dry friction, negative pressure and idle operation.
The seal chamber has not exhausted
、Heat shock, quench .
Too big temperature difference
The testing pressure too high or exceed the standard ,reverse pressure
| Reduce the seal compression suitably
Assemble and adjusting again, improvement the system structure，
Change the structure style of the seal, strengthening the measures of cooling and lubrication
| | face burned | Block up the flushing, cooling, or the system of pressure reduced pipeline
Too high speed, too high pressure
Too big vibration, unusual cavitations, surge and bearing
Cavitations, inspiration, exhaustion at the seal with dry friction, negative pressure and idle operation.
The seal chamber has not exhausted | Reduce the seal compression suitably
Assemble and adjusting again, improvement the system structure
Change the structure style of the seal, strengthening the measures of cooling and lubrication
| | Face wears | Too high speed, too high pressure
Too big vibration, unusual cavitations, surge and bearing
Cavitations, inspiration, exhaustion at the seal with dry friction, negative pressure and idle operation.
The face has the impurities, the medium has the particles. | Reduce the seal compression suitably
Assemble and adjusting again carefully, grinding the face, improve the system structure
Change hard material making end face
| | Face scraped | Too big vibration, unusual cavitations, surge and bearing
Cavitations, inspiration, exhaustion at the seal with dry friction, negative pressure and idle operation.
Scraped the face when installation
| Assemble and adjusting again carefully, grinding the face, improve the system structure
Change hard material making end face
| | Seal destroyed | Block up the flushing, cooling, or the system of pressure reduced pipeline
Too high speed, too high pressure
Too big vibration, unusual cavitations, surge and bearing
Cavitations, inspiration, exhaustion at the seal with dry friction, negative pressure and idle operation.
The seal chamber has not exhausted | Assemble and adjusting again, inspect the liability of the transmission system, improvement the system structure
drain the gas in the system pipe line exhausted
Change the structure style of the seal, strengthening the measures of cooling and lubrication
| | Face wears very soon | Pressure fluctuates cavitation,surge
Heat shock, quench
Too big temperature difference
The testing pressure too high or exceed the standard ,reverse pressure
| Assemble and adjusting again carefully, grinding the face, improve the system structure
Change hard material making end face
Choose another seal structure
| | The surface destroyed, or become deformed | Pressure fluctuates cavitation,surge
Heat shock, quench
Too big temperature difference
The testing pressure too high or exceed the standard ,reverse pressure
| Assemble and adjusting again carefully, grinding the face, improve the system structure
Increase the measure of preserving heat or cooling down and keep sufficient time |
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note
Project technology center：0415-6225535、6220417、6227233
after service： 0415-6270013 |
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