**NSK Bearing Heating Solution** Home > Bearing Knowledge > NSK Bearing Heating Solution *Created on 2018/5/16* var cpro_id = "u3440131";

NSK Bearing Heating Solution

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*Created on 2017/12/25* var cpro_id = 'u3171089';

NSK bearings are widely used in various industries such as machine tools, aerospace, petrochemicals, chemical fiber, textile, mechanical manufacturing, electric motors, power generation, clothing machinery, power tools, vehicle production, ships, mining, papermaking, and printing. Proper handling of bearing temperature issues is essential to ensure smooth operation and prevent damage. When the temperature of an imported bearing rises, it's important to identify the cause and take appropriate action. Here are some key steps to follow: **Disposal Method When Imported Bearing Temperature Rises:** 1. **Check Oil Level:** Ensure the oil level is normal. If it's low, check if the oil drain valve is closed. If it's not, refill the oil. If there's a leak, stop the system immediately. 2. **Inspect Cooling Water System:** Check the water pressure and flow. If the pressure is low, clean or replace the filter. If the issue persists, shut down the system until the problem is resolved. 3. **Listen for Abnormal Sounds:** Pay attention to any unusual noises coming from the bearing. Also, check for excessive vibration. 4. **Check Oil Pressure:** Monitor the oil pressure from the governor. If it's too low, consider closing the cooling water hydraulic valve. 5. **Oil Sample Analysis:** Take an oil sample to check its color and condition. If the oil has degraded, replace it with fresh oil. **Indicators of Rising Bearing Temperature:** - The system will trigger a fault signal. - The machine’s indicator light may turn on. - The temperature reading will increase. - An alarm bell may sound. - The thermometer needle (bulging large thermometer) may move into the yellow zone or exceed it. **Reasons for Increased Bearing Temperature:** - Poor oil quality due to contamination or degradation during operation. - Water mixing with the oil can increase acidity, reducing lubrication efficiency and potentially corroding the bearing bush. - Inadequate cooling water supply or blockages in the cooling system can also lead to overheating. It's crucial to monitor and maintain bearings regularly to avoid failures and extend their lifespan. If you notice any signs of overheating, take immediate action to prevent further damage. **Related Bearing Knowledge:** - Types and markings of hydrodynamic bearings - How to distinguish between genuine and counterfeit bearings - Understanding bearing limit speed and practical application This article is sourced from China Bearing Network. Please visit [http://www.chinabearing.net](http://www.chinabearing.net) for more information. Previous: IKO Bearing Smooth Protection Method Next: How to Apply Bearing Limit Speed in Practical Applications?

SPR rubber Vertical Slurry Pump

Naipu SPR rubber Vertical Slurry Pumps are vertical, centrifugal slurry pumps submerged in sump to work.They are designed for delivering abrasive,large particle and high density slurries.These pumps have no need of any shaft seal and sealing water. They can also be operated normally for insufficient suction duties.Wet parts of type NP-SP pump are made of abrasion-resistant metal. All parts of type NP-SP(R) pump immersed in liquid are lined with rubber outer liner.They are suited to transport non-edge angle abrasive slurry.

Typical Applications---

Sump drainage washdown
Floor drainage
Mill sumps
Carbon transfer
Monitoring

Magnetite mixing

NP-SPR Construction Drawing

Main Part Number At The Drawing

1.Discharge Pipe 2.Column 3.Strainer 4.Back Liner

5.Impeller 6.Pump Casing 7.Lower Pipe

Materials of Construction

	IMPELLERS	CASING	COLUMN	DISCHARGE	SEALS
Standard	High Chrome Alloy Rubber	High Chrome Alloy Rubber	Mild Steel Mild Steel Rubber Lined	Mild Steel Mild Steel Rubber Lined	Natural Rubber Rubber
Options	Butyl EPDM Hypalon Polyurethane 316 SS W 151	Neoprene Butyl EPDM Hypalon Nitrile 316 SS W 151	Neoprene Butyl Nitrile 316 SS	Neoprene Butyl Nitrile 316 SS	Nordel Neoprene Viton Hypalon Butyl EPDM

Selection Chart

SP SUMP PUMP PERFORMANCE PARAMETERS

Type	Allowable Mating Max. Power(Kw)	Range Of Performance					Impeller
		Capacity/Q		Head/m	Speed/rpm	Max Efficiency/%	No. of Vanes	Impeller Diameter/mm
		m³/hr	L/S
40PV-NP-SP	15	19.44-43.2	5.4-12	4.5-28.5	1000-2200	40	5	188
65QV-NP-SP	30	23.4-111	6.5-30.8	5-29.5	700-1500	50	5	280
100RV-NP-SP	75	54-289	15-80.3	5-35	500-1200	56	5	370
150SV-NP-SP	110	108-479.16	30-133.1	8.5-40	500-1000	52	5	450
200SV-NP-SP	110	189-891	152.5-247.5	6.5-37	400-850	64	5	520
250TV-NP-SP	200	261-1089	72.5-302.5	7.5-33.5	400-750	60	5	575
300TV-NP-SP	200	288-1267	80-352	6.5-33	350-700	50	5	610

Spr Rubber Vertical Slurry Pump,40Pv Rubber Slurry Pump,65Qv Rubber Vertial Pump,100Rv Rubber Slurry Pump

Shijiazhuang Naipu Pump Co., Ltd. , https://www.naipu-pump.com