| Home>Bearing knowledge>Technical standards for centrifugal pump bearings |
Technical standard for centrifugal pump bearings
| /*250*250 was created on 2017/12/25*/ var cpro_id = 'u3171089'; |
The values ​​of bearing scale public service and rotation accuracy are in accordance with the rules of GB307-84.
2. The journal and the bearing inner hole of the bearing cooperate with the bearing according to the rules of GB1031-83; the journal roughness Ra value is less than 1.6 μm; the bearing case inner hole roughness Ra value is less than 2. 5 μm.
3. When making bearing rings and rollers with GCr15 and ZGCr15 steel; the hardness value of the ferrule and roller should be 61~65HRC, when made of GCr15SiMn and ZGCr15SiMn steel; the hardness value should be 60~64HRC. View the method and the uniformity of the hardness of the same part according to the rules of JB1255.
4, to see the radial clearance and axial clearance of the bearing should be in accordance with the rules of GB4604-84.
5. The inner and outer ring raceways of rolling bearings should be free from falling off and severely worn; there should be no cracks in the inner and outer rings, the balls should be free of wear; the cages are not severely deformed; there is no abnormal noise and oscillation during the transition; the stop should be stopped gradually.
6. About the C-class public service tapered roller bearing; the touch precision of the roller and the ferrule raceway; under the effect of the certain load; color viewing; the touch marks should be connected; the touch length should not be smaller than the roller busbar 80.
Second, the sliding bearing 1, the radial thick-walled tile 1 using the lead method, the lifting shaft method or other methods to measure the bearing gap and tile interference; shaft clearance fit requirements; tile interference should be 0 ~ 0. 02mm.
2 Check the parts; there should be no damage and cracks; the bearing bush should be free from falling off, pores, cracks, channels and partial wear.
The contact condition of the 3-axis bush and the journal is viewed by the color method; the viewing point should be 60°～90° (the lower limit of the speed is higher than 1000r/min; the upper limit of the speed is lower than 1000r/min). The demand in the touch range Uniform touch; there should be 2 to 4 touch points per square centimeter; if the touch is poor, it is necessary to conduct scraping.
4 cleaning the bearing box; each oil hole dredging; no cracks, leakage appearance.
5W back and bearing housing should be tightly and evenly fitted; view by color method; touch area is not less than 50.
2. The alloy layer and the tile shell of the radial thin-walled tile 1 bearing bush shall be firmly and closely connected; there shall be no delamination or shelling appearance. The surface of the alloy layer and the facets of the two half-watt tiles shall be lubricated and flat; Shortcomings such as cracks, pores, heavy skin, slag inclusions and bumps.
2W back and the inner hole of the bearing housing should be closely and evenly fitted; view by color method; inner diameter is less than 180mm; its touch area is not less than 85; inner diameter is greater than or equal to 180mm; its touch area is not less than 70.
The cooperation gap and touch condition of the 3-axis bush and the journal are ensured by the machining precision; the touch area is usually not allowed to scrape; if the touch is not uniform along the axial direction; it can be slightly trimmed.
4 After installation; use a 0. 02mm feeler gauge at the bisector; it should not be qualified.
3. Regarding the thrust bearing 1 bearing bush should be free from wear, deformation, cracks, scratches, delamination, crushing and burn defects, and the impression at the touch of the thrust plate should be uniform; the touch area should be not less than 70 and the entire circumference of each tile The block is evenly distributed, and the thickness difference of the same group of tiles should not be greater than 0. 01mm; the tile babbitt should be rounded into the oil wedge according to the direction of rotation; in order to facilitate the entry of lubricating oil, the back bearing surface is flat and lubricated.
2 Adjust the gasket should be lubricated, flat, non-flexible, and use a layer of gasket with a thickness difference of not more than 0. 01mm.
3 After the bearing cap is assembled, the thrust bearing method is repeatedly measured by the push shaft method; the value should be within the demand range. It is necessary to measure and use the thrust bearing clearance of the shaft displacement probe to use this method; and adjust according to the rules. Good displacement probe indication zero.
4 bearing shell horizontal contact surface is tight; good position. Oil temperature measuring oil hole and tile cover eye alignment; not skewed. Oil hole clean and clear.
Recommend to friends comments close window
| Bearing related knowledge |
| Experimental discussion on the collision and wear of glass ceramic materials and bearing steel surface. Viewing and handling of bearing operations (1) Drawing characteristics of Timken interspersed roller bearings NTN will hold rolling bearing applications and protect against early failure problems Y-bearing unit unit |
This article links to http://
Please indicate the bearing network http://
Previous:What is the element that forms the appearance of the bearing workpiece?
Next: Noise and countermeasure analysis of bearing manufacturing factors
Led Fish Tank Lights With Remote
Led Fish Tank Lights With Remote ADVANTAGE
1. Light using CREE LED chips.
2. Unique technology of Standard module design.
3. Brand new idea,all-round LED optic lens.
4. Increases 15% of the growth.
5. Air-circulation system designed to improve The plants' photosynthesis and growth.
6. Easy Disassembling and Reassembling .
7. Exclusive Design:Checking and indicating defects Automatically.
8. Grow your corals under LEDs
9. Enhance the colors on your fish
Our Led Fish Tank Lights With Remote is popular in led market,cause its elegant outlook and its high quality and competitive price.
Item Display
Key Features
1.The lifespan is over 50000 hours,low maintenance costs.
2.Energy conservation,saving over 80% energy than the traditional HPS.
3.High light efficiency,90% of the light will be absorbed by the aquatic plants,while just 8%-10% to the HPS.
4.Build-in cooling system,could solve the heat dissipation excellently.
5.Built-in power supply, CE approved, No setup required, just simpler and safer plugs directly into AC85V-264V, no reflector & ballast needed.
Convenient in using lights at the same time.
Package Include
1 X Free Hanging Kit
1X Free Power Cord
Quality Control systems and after-sales
All the lamps have passed strict quality examination and are packed carefully before shipping.In order that our customers get high quality lamps,we attach importance to every details.
Application
1. coral reef lighting,fish tank lighting,coral reef tank lighting
2. aquarium lighting,aquarium art,aquarium shop,aquarim centre
3. fish bowl lighting,fish lighting,freshwater lighting,saltwater lighting
Our Company
Philizon enjoys a high reputation in grow led lamp and led Aquarium Light fields throughout Europe and America,Philizon also insists on taking high technology to design the newest&best led Grow Light and aquarium light constantly as the market request. Our R&D team with more than 10 people has rich experience in appearance design, electronic structure,heat dissipation simulation analysis,optical lens design,light control system etc.Most of our hydroponics full spectrum led grow lighting and Led Fish Tank Lights With Remote are private modules,we have 10 more design patent and utility model patent till now.
Trade Terms
Payment: T/T, L/C, Paypal, 30% deposits before production, 70% balance to be paid before deliverying(Western Union are welcome)
Sample will be delivered within 7 working days.
Discounts are offered based on order quanlityes.
MOQ:sample order are acceptable
Delivery ways:DHL,UPS,FedEx,TNT, door to door,by sea,by air,etc.
Our products ranges:
LED plant grow lights for agricultural lighting;
LED aquarium lights for fish tanks,corals,saltwater tank,marine tank with reef,coral,sps,lps,fish,etc;
Warmly welcome to take a visit on our factory at any time and we will pick you up at the airport in Shenzhen.
Dimmable Led Aquarium Light,Dimmable Aquarium Light,Coral Reef Led Aquarium Light,Dimmable Aquarium Light Led
Shenzhen Phlizon Technology Co.,Ltd. , https://www.szledplantgrowlights.com