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Application of spherical plain bearing hydraulic cylinder
The core application of spherical plain bearings in hydraulic cylinders mainly lies in their unique self-aligning ability and composite load-bearing characteristics. The specific design points and application scenarios are as follows:
I. Core Functions and Technical Compatibility
Youdaoplaceholder0 self-centering compensation and motion adaptation
The piston rod of the hydraulic cylinder is prone to axis deviation due to load skew or installation deviation. The spherical plain bearing automatically compensates for the axis deviation of ≤5° through the sliding structure of the inner and outer spherical surfaces (spherical contact Angle ±25°), avoiding seal failure or cylinder deformation caused by local stress concentration .
Supports low-speed swinging (≤3 r/min) and small-angle tilting motion (such as pitch adjustment of construction machinery arms), and is suitable for non-linear reciprocating conditions of hydraulic systems .
Youdaoplaceholder0 composite load bearing design
Youdaoplaceholder0 Radial load dominance : The radial force transmitted by the piston rod is distributed and borne by the spherical surface of the outer ring of the bearing. For example, the GE type radial spherical plain bearing can bear more than 80% of the radial load.
Youdaoplaceholder0 axial/combined load : angular contact type (such as GAC...) S) It can withstand combined radial and unidirectional axial loads, and the thrust type (GX... S) Pure axial support specifically for the end cover of the oil cylinder
Ii. Industry Application Scenarios and Failure Prevention
Youdaoplaceholder0 construction machinery field
Excavator boom cylinder: The end spherical bearing of the boom (such as GK80CK) is fixed by locking bolts to withstand the impact load during excavation, and the fit clearance is ≤0.1mm ;
The hydraulic lifting mechanism of the crane: The thrust joint bearing bears the axial pressure of the jack, and the rated static load should be ≥1.5 times the working load .
Youdaoplaceholder0 Failure prevention measures
Youdaoplaceholder0 Overheating monitoring : When the bearing temperature exceeds 120℃, the viscosity of the grease drops by 60%. A temperature sensor needs to be configured for early warning .
Youdaoplaceholder0 vibration analysis : Abnormal increase in swing frequency indicates wear of the gasket, and the gap increment should be tested in accordance with the JB/T 13611-2019 standard
Iii. Design Taboos and Improvement Directions
Youdaoplaceholder0 taboos :
Avoid using it under conditions of pure high-speed rotation (> 10 r/min) or tilt Angle > 5° to prevent accelerated spherical wear.
Radial spherical plain bearings are prohibited from being used in pure axial thrust scenarios (GX type thrust bearings must be selected) .
Youdaoplaceholder0 improve :
Ceramic-coated spherical surfaces (such as silicon nitride) can reduce wear rate by 40% and are suitable for high-temperature hydraulic systems .
Youdaoplaceholder0 Case reference : The hydraulic cylinder of a certain forging and pressing machine tool adopts the GE20C type self-lubricating bearing. Under the condition of a 3° deviation, its service life is extended to 8,000 hours, which is 2.3 times longer than that of ordinary bearings
v
Application of spherical plain bearing hydraulic cylinder
The core application of spherical plain bearings in hydraulic cylinders mainly lies in their unique self-aligning ability and composite load-bearing characteristics. The specific design points and application scenarios are as follows:
I. Core Functions and Technical Compatibility
Youdaoplaceholder0 self-centering compensation and motion adaptation
The piston rod of the hydraulic cylinder is prone to axis deviation due to load skew or installation deviation. The spherical plain bearing automatically compensates for the axis deviation of ≤5° through the sliding structure of the inner and outer spherical surfaces (spherical contact Angle ±25°), avoiding seal failure or cylinder deformation caused by local stress concentration .
Supports low-speed swinging (≤3 r/min) and small-angle tilting motion (such as pitch adjustment of construction machinery arms), and is suitable for non-linear reciprocating conditions of hydraulic systems .
Youdaoplaceholder0 composite load bearing design
Youdaoplaceholder0 Radial load dominance : The radial force transmitted by the piston rod is distributed and borne by the spherical surface of the outer ring of the bearing. For example, the GE type radial spherical plain bearing can bear more than 80% of the radial load.
Youdaoplaceholder0 axial/combined load : angular contact type (such as GAC...) S) It can withstand combined radial and unidirectional axial loads, and the thrust type (GX... S) Pure axial support specifically for the end cover of the oil cylinder
Ii. Industry Application Scenarios and Failure Prevention
Youdaoplaceholder0 construction machinery field
Excavator boom cylinder: The end spherical bearing of the boom (such as GK80CK) is fixed by locking bolts to withstand the impact load during excavation, and the fit clearance is ≤0.1mm ;
The hydraulic lifting mechanism of the crane: The thrust joint bearing bears the axial pressure of the jack, and the rated static load should be ≥1.5 times the working load .
Youdaoplaceholder0 Failure prevention measures
Youdaoplaceholder0 Overheating monitoring : When the bearing temperature exceeds 120℃, the viscosity of the grease drops by 60%. A temperature sensor needs to be configured for early warning .
Youdaoplaceholder0 vibration analysis : Abnormal increase in swing frequency indicates wear of the gasket, and the gap increment should be tested in accordance with the JB/T 13611-2019 standard
Iii. Design Taboos and Improvement Directions
Youdaoplaceholder0 taboos :
Avoid using it under conditions of pure high-speed rotation (> 10 r/min) or tilt Angle > 5° to prevent accelerated spherical wear.
Radial spherical plain bearings are prohibited from being used in pure axial thrust scenarios (GX type thrust bearings must be selected) .
Youdaoplaceholder0 improve :
Ceramic-coated spherical surfaces (such as silicon nitride) can reduce wear rate by 40% and are suitable for high-temperature hydraulic systems .
Youdaoplaceholder0 Case reference : The hydraulic cylinder of a certain forging and pressing machine tool adopts the GE20C type self-lubricating bearing. Under the condition of a 3° deviation, its service life is extended to 8,000 hours, which is 2.3 times longer than that of ordinary bearings
