In the oil station system of a thermal power plant, the maintenance cycle of the gear pump directly affects the economic operation of the unit. The CB-B63 gear pump achieves a breakthrough performance of 10,000 hours of maintenance-free operation through the innovative combination of powder metallurgy gears and oil-free lubricated bearings. This article will deeply analyze its technical principles and engineering practices.

1. The wear-resistant code of powder metallurgy gears

The CB-B63 gear pump uses Fe-Cu-Ni-Mo powder metallurgy materials, sintered at 1150℃ and tempered at 200C, with a hardness of HRC35-40. Compared with traditional machined gears:

• Porosity control: Through 600 MPa cold isostatic pressing, the porosity is ≤0.5% to avoid stress concentration
• Self-lubricating properties: 5% graphite particles are evenly distributed in the material, and the friction coefficient is reduced to 0.08
• Anti-bite design: The tooth surface is treated with 0.05 mm sulfurization to form a FeS solid lubrication film

Measured data show that under 60 ℃ and 2.5 MPa working conditions, the wear rate of powder metallurgy gears is only 0.002 mm/10^3h, which is 1/5 of the traditional 40Cr hardened gears.

2. Micron-level clearance control technology

The clearance between the oil-free lubricated bearing and the gear shaft of the CB-B63 gear pump is precisely controlled at 0.02-0.03 mm. This technological breakthrough includes three cores:

• Thermal expansion compensation: The bearing is made of copper-based composite material with a linear expansion coefficient of 18×10^−6 / ℃, which forms a gradient match with the steel shaft (11×10^−6/℃)
• Surface texture: The inner hole of the bearing is laser-processed with 50 μm deep micro-pits, and the oil storage capacity is increased by 40%
• Adaptive adjustment: The spring steel backing structure can compensate for 0.15 mm shaft offset at a speed of 2000 r/min. This design stabilizes the vibration value within 2.8 mm/s, which is 62% lower than the needle bearing solution.

3. Engineering application evidence

The case of the transformation of the 660MW unit dilute oil station of a power plant shows that after replacing the CB-B63 gear pump:

• Operation data: Detected after 12,800 hours of continuous operation
• Gear side clearance growth: 0.08 mm (standard allowable value 0.15 mm)
• Bearing wear: 0.012 mm
• Volume efficiency: 92.5% (initial value 94%)
• Reliability: The number of failure shutdowns has dropped from an average of 3.2 times per year to 0 times

4. System design behind maintenance-free

• Double-lip nitrile seal: 70° Shore hardness rubber, lip interference 0.4 mm, and 85% rebound rate after 10^4 axial reciprocating motions
• Helical gear noise reduction: 15° helix angle design makes the flow pulsation rate ≤5%, and the noise is controlled at 65 dB(A)
• Intelligent early warning system: Built-in vibration sensor, when the acceleration value exceeds 4 m/s2 triggers an early warning

Through the closed loop of material innovation-precision manufacturing-intelligent monitoring, the CB-B63 gear pump redefines the reliability standard of industrial gear pumps. This breakthrough not only reduces maintenance costs by 73%, but also provides key technical support for the continuous operation of thermal power plants.

When looking for high-quality, reliable oil pumps, YOYIK is undoubtedly a choice worth considering. The company specializes in providing a variety of power equipment including steam turbine accessories, and has won wide acclaim for its high-quality products and services. For more information or inquiries, please contact the customer service below:

E-mail: sales@yoyik.com
Tel: +86-838-2226655
Whatsapp: +86-13618105229

Yoyik offers various types of spare parts for steam turbines, generators, boilers in power plants:
BEARING 65AY50 X 9
12v hydraulic solenoid valve YC24D DN15
seal kit SF08-23-P-O-P-230AG
Repair package of seal oil recirculation pump DLZB820R64B
Pressure relief valve YSF16-70/130KKJ
mechanical seal 11-M74-D/35-G6
accumulator NXQ-AB-40-F-Y
Hydraulic oil pump MHP350A578MEA207
Stop valve J61Y-P5410V
Reheat hot forging plug valve SD61H-P57.462V SA-182 F91
Pneumatic stop valve J661Y-P5550V
液下泵 100Y\M00-50-30
Stop valve J61H-64P
bellow seal globe valve manufacturer WJ25F1.6P
Spigot Ring P29617D-00 for dome valve DN200 P29617D-00
Bladder NXQ-AB-25/10-F-A
Stop valve J61Y-P52160I
stainless steel end suction pumps CZ50-250C
Electrohydraulic Servo Valve D664-4798-L05HABW6NEX2-G
screw gear pump HSN210-54
Electric stop valve J961Y-600LB
bevel gear box 317090HA
Superheater outlet safety valve A68Y-P54.5110V
Electric stop valve body J965Y-P5163I
ss solenoid valve J-220VDC-DN10-DOF/20D/2N
Filters GL61H-160
regulating globe valve KHWJ15F-1.6P
Throttle valve L61W-2000LB
Stop valve J61Y-2000SPL
Stop valve J65Y-630
Accumulator Bladder for GV NXQ-A-25/31.5
Emergency pump coupling cushion HSND280-46N