If the outlet check valve of an LDX85-70 AC lubricating oil pump leaks due to wear or damage to the sealing surface, the pump may reverse after shutdown due to reverse system pressure. This phenomenon poses multiple mechanical risks:

 

Bearing damage: When the LDX85-70 AC lubricating oil pump reverses, the axial force acting on the bearings is opposite to the design operating conditions, potentially causing abnormal wear of the rolling elements and raceways, or even bearing seizure.

 

Seal failure: Mechanical seals or shaft seals may lose their sealing effectiveness due to reverse pressure during reverse operation, leading to lubricant leakage or foreign matter intrusion.

 

System pressure fluctuations: Reverse operation of the LDX85-70 AC lubricating oil pump can cause transient system pressure fluctuations, affecting lubrication system stability and even triggering protective devices.

 

Preventative measures include: regularly inspecting the sealing performance of the check valve and replacing worn parts; adding a check valve or accumulator at the pump outlet to absorb reverse pressure; and optimizing the pump's start-stop logic to avoid the risk of reverse operation caused by frequent shutdowns.

 

As a leader in the electromechanical equipment industry, YOYIK has a rich product line, covering hydroelectric generator sets, coal-fired generator sets and their accessories, as well as electrical and electronic product processing. Based on scientific management, the company has passed the ISO9004 quality system certification, adhered to authentic direct sales, and has become the preferred partner of many users with excellent quality and all-round services.

 

We can provide a variety of spare parts for power plants, as follows:

#DF-AC lubricating oil pump LDX85-70-DF

fuel cooler BIU400-4.0/1.0-18-2.5/19-21

Oil supply pump 40AY35X8

The electromagnetic valve 22FDA-F5T-W110R-20/B0

Oil supply pump 3GW45X4-46

o-ring 1520X5.3

Electric gate valve Z941W-10P

gear pump end cap (DE) 2CY-45/9-1A

Servo valve 0508886T0102AW018

Butterfly valve D341X-10Q

oil station globe check valve J50C-1.6P

pipe clamp SP763PADP-AS

Fluorine rubber sealing ring HY-SO-0166-V

seal sleeve lock nut FK5C32AM-03-02

AC lubricating oil pump 125LY-35-16

Fluorine rubber ring C8689117

Solenoid valve 0508.1095T0804.AW002

Spherical joint HTQXJT-5

OIL COOLER USED FOR INGERSOLL RANDCOMPRESSOR MODEL MM200 22084735

Sealing ring HB4-58-55-4AR

pressure hose SMS-10-1219-C

Submerged pump 100YW50-100-50-30

Butterfly Valve BDY-100 DN 100

mechanical trip valve F3DG5S2-062A-50-DFZK-V

oil cooler YL-85

Stop valve J41H-40

Electric stop valve J961Y-P51150V

EH oil filter pump F3-SDV10-1P-7P-1A

Encoder PVM14N-05MK2A301-1213

Seals WJ01.37.106

EHC PUMP PVH-074-R-01-AB-10-A25-0000002001AE010A

Stop valve J61Y-P55.5190I

Overflow valve RV5-10-S-0-20

Three-phase transformer SG-100VA

Sealing component of energy storage device NXQ-AB-100/10LY

Guide sleeve YY8.626.043.BA

Main interruption solenoid valve 5YV

O-ring rubber seal 20*3.1-G-S-GB/T3452.1

AC lubricating oil pump LDX85-70

 

Fan D2E160AB01-06 10UF410VDB

RUBBER BLADDER NXQ A10/31.5-L

solenoid valve 168.33.42.40.05(1)

Fluorine rubber O-ring φ21.2*2.65

Throttle valve L61Y-P5650P

EH oil pump PVH098R01AD30A25

Control system OPC/AST solenoid valve 4WE10y33/CG110N9K4/V

solenoid valve 4WE6Y6X/EG220NZ4/V

mechanical seal DFB-80-80-240

Sealing strip\N35 MGS-10EX/2

control valve units 4WE6E61/CW220-50N9Z50/C

oil pump PVH098R01AJ30A250000002001AB010A

solenoid valve DG4V-3-2A-MU-D6-60

Pneumatic air exhaust valve J661Y-P55.5190V ZG15Cr1Mo1V

vane pump F3 V10 1S6S 1S20

Accumulator Bladder NXQ-A-40/31.5-FY/R

Steel pipe flange metal gasket HG/T20612-2009

One-way valve CV1-16V-P-O-5

VALVE: SOLENOID VFS5210-4DB

The electromagnetic valve 0508.149370301.AW027

throttle valve NDV-20-V-B

3-Way Air Solenoid Valve 5M3V410-15NC

Reheat hot section plugging valve SD61H-P5550V SA-182 F91

Maintenance package RSP280

Rotary valve HH6424DF24 1.5"

Airbag NXQ-AB-50/20-L-Y

Servo valve MOOG72-2623

Bellows sealed steel globe valve KHWJ15F1.6P

Solenoid valve 4WE10D5X/0FEG220N9K4/V

Bearing NU222E.M1.C3

OIL THROWER (THRUST BEARING) HZB200-430-01-09

Sealed oil float oil tank float ball valve seal DK-AAAHD433-01-29

High pressure inlet water supply hydraulic three-way valve F763Y-320

Reheater outlet plug valve SD61H-P60.873V SA-182 F92

O-ring GB3452.1 128*5.3-HN7445

Mechanical isolation valve WJA3.039

Stop valve J65Y-630I

AC lubricating oil pump LDX85-70

 

DFYLMY-2025-8-1-A