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Optimized Design for Anti-Foaming in Vehicle-Mounted Pump Hydraulic Oil Tanks
Release time:
2026-05-19
Source:
Author:
Summary:
The hydraulic reservoir is a critical component of the hydraulic system, and its design quality directly affects the generation and elimination of fluid foaming. A well‑designed reservoir can effectively minimize foam, ensure stable system operation, and extend the service life of system components.
I. Anti-Foaming Design of the Fuel Tank Structure
Volume and Dimension Optimization
Scientifically determine the basic parameters of the fuel tank:
1. The effective volume shall be equal to the pump displacement of 3-5 倍, ensuring that the hydraulic fluid has sufficient time to release entrained air bubbles.
2. It adopts a rectangular design, increasing the oil’s surface area to facilitate bubble escape.
3. The height-to-base-area ratio is maintained at 1:1 To 1:1.5 between
4. Set appropriate upper and lower liquid level limits to maintain a stable oil surface.
Internal partition design
Anti-foaming considerations for baffle arrangement:
Install complete baffles to separate the oil suction zone from the oil return zone.
The baffle height is equal to the liquid level height. Two-thirds , promote oil circulation
The gap between the partition and the box wall shall be maintained within 15-20mm
A diversion hole is provided at the bottom of the baffle to prevent vortex formation.
II. Anti-foaming Design of the Oil Return System
Return oil line layout
Key considerations for designing the oil return line to prevent foaming:
The oil return pipe outlet is positioned below the liquid surface, at a distance from the bottom of the tank. Two-thirds At the height of
Chamfered outlet of the oil return pipe 45 °, facing the box wall
The return oil speed is controlled at 1m/s The following
A diffusive oil-return fitting is used to reduce the flow velocity.
Defoaming Device Design
Specialized defoaming structure configuration:
1. Install multi-layer perforated defoaming panels, with hole diameter 3-5mm
2. Install an inclined deflector to extend the oil flow path.
3. It employs a honeycomb‑type defoaming structure to increase the contact area.
4. Equip with a magnetic filter to adsorb metallic particles.
III. Optimized Design of the Oil-Suction System
Oil suction port design
Cavitation-Resistant Design of the Oil Suction Line:
The height of the oil suction port from the bottom of the tank is maintained. 3-5 Double the pipe diameter
A coarse filter is installed at the oil suction port, with a filtration accuracy of… 100 mu m
Bevelled oil suction port 45 °, to avoid vortex formation
The oil absorption rate is controlled at 0.5-1.0m/s
Anti-vortex structure
Measures to prevent oil suction in the scroll compressor:
1. Install an anti-vortex plate above the oil suction port.
2. The oil suction port and the oil return port are kept at the maximum distance.
3. The minimum liquid level is higher than the oil suction port. 100mm The above
4. Install a liquid-level alarm to replenish oil promptly.
IV. Exhaust and Ventilation Design
Exhaust system
Bubble Exhaust Channel Design:
Install an air vent at the highest point of the fuel tank.
An inclined surface is installed at the top to guide bubble aggregation.
Vent holes are provided at critical locations, with a diameter of… 2-3mm
Install an automatic venting device to continuously discharge accumulated gases.
Air filter
Breathable system with anti-contamination design:
1. Select a respirator with a desiccant.
2. Filtration accuracy is not less than 40 mu m
3. Install a condensate cup to prevent water from entering.
4. Replace the filter cartridge regularly to maintain unobstructed flow.
V. Materials and Surface Treatment
Internal surface treatment
Anti-foaming treatment for the inner wall of the fuel tank:
Sandblasting is employed to increase surface roughness.
Apply an anti-foaming epoxy coating to reduce surface tension.
Avoid using materials that promote foam formation.
The inner wall features rounded transitions to minimize bubble adhesion.
Material Selection
Considerations for Fuel Tank Material:
1. Use stainless steel or galvanized steel sheet.
2. Avoid using porous materials.
3. The material exhibits good compatibility with the hydraulic fluid.
4. Possesses sufficient strength and corrosion resistance.
VI. Attachment Configuration Optimization
Liquid Level Monitoring
Precise liquid level management:
Configure a level gauge with a thermometer.
Set high and low liquid level sensors
Install the liquid-level automatic compensation device.
Equipped with a remote monitoring interface
Temperature control
Oil temperature management measures:
1. Install an automatic oil temperature control system.
2. Set up the cooler bypass circuit.
3. Configure a heater to prevent low-temperature startup.
4. Monitoring points are deployed in the oil return area.
VII. Usage and Maintenance Recommendations
Daily maintenance
Keep the fuel tank in optimal condition:
Regularly inspect oil quality.
Promptly remove sediment from the bottom of the tank.
Keep the airway clear.
Record the oil change interval.
Fault Prevention
Establish an early warning mechanism:
1. Monitor foam generation.
2. Regular oil sampling and testing
3. Establish and maintain archives
4. Develop an emergency response plan
Conclusion
The anti-foaming design of hydraulic oil tanks for vehicle-mounted pumps requires a systematic consideration of multiple factors, including structural configuration, material selection, and auxiliary component integration. Through scientifically sound design and adherence to standardized operation and maintenance practices, foam generation can be effectively minimized, thereby enhancing system reliability. It is recommended to thoroughly evaluate design options during the development phase, implement rigorous quality control during manufacturing, and strengthen maintenance management during service to ensure the tank consistently operates in optimal condition. Additionally, emphasis should be placed on collecting and analyzing real-world operational data to continuously refine the design, providing reliable assurance for stable equipment performance.
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