Hull Cleaning Robot Buoyancy
| Density : | 0.13g/cm³ |
| Size : | 1300*850*200mm |
| Depth : | 100m |
| Application Areas : | Hull Cleaning Robot |
The hull cleaning robot buoyancy is one of the core components of the entire system. Its main function is to provide buoyancy, balance the self-weight, and adjust the underwater posture. It is not a simple "buoyancy block", but a key module that is precisely designed based on the operation mode (floating or crawling).
Material selection:
Ship body cleaning robots (especially those for deep-sea operations) usually employ solid buoyancy materials. These materials are a type of low-density (0.35- 0.7g/cm³), high-strength polymer-based solid compound, featuring low water absorption rate (≤3%) and corrosion resistance. They can withstand water pressures of several thousand meters and provide stable net buoyancy for the robots.
Some lightly-loaded or observation-level robots also employ lightweight aluminum alloy frames combined with pressure-resistant shells to construct their buoyancy structures.
Key points of functional design:
Counteracting self-weight: The cleaning discs and hydraulic devices are usually heavy. The floating body needs to precisely counteract the self-weight of steel and copper parts to achieve balance during underwater operations, making it easier for the mechanical arm to operate.
Posture and Balance: During the design process, it is necessary to precisely calculate the relative positions of the center of buoyancy and the center of gravity. Usually, the floating body is placed on the upper part of the robot, while the heavier cleaning discs and electronic compartments are placed on the lower part. This arrangement forms a stable stabilizing moment to prevent the robot from capsizing in the water flow.
Modular Adaptation: To accommodate the complex hull surfaces, floating bodies or buoyancy units are usually installed in a modular manner, which facilitates the adjustment of balance according to the weight of the carried tools (such as cavitation jet discs, brush discs).
| Foam buoyancy material performance table | ||||
| Item | Model | Density | Depth | Compressive strength |
| (g/cm³) | (m) | (MPa) | ||
| Standard Performance Buoyancy | HJ-80 | 0.08 | 30 | ≥1.4 |
| HJ-100 | 0.10 | 50 | ≥2 | |
| HJ-130 | 0.13 | 100 | ≥3 | |
| HJ-200 | 0.20 | 150 | ≥4.8 | |
| HJ-250 | 0.25 | 200 | ≥6.2 | |
| HJ-030 | 0.30 | 250 | ≥7.6 | |
| High performance Buoyancy |
HJH-200 | 0.20 | 200 | ≥4.5 |
| HJH-250 | 0.25 | 300 | ≥6.1 | |
| HJH-250 | 0.3 | 450 | ≥7 | |
| HJH-360 | 0.36 | 550 | ≥9 | |
| HJH-040 | 0.4 | 650 | ≥10 | |
| Microsphere buoyancy material performance table | |||||
| Item | Model | Density | Depth | Water absorption | Compressive strength |
| (g/cm³) | (m) | （24H） | (MPa) | ||
| Standard Performance Buoyancy | HJ-036 | 0.36±0.01 | ≤500 | ≤1% | ≥16 |
| HJ-038 | 0.38±0.01 | 800 | ≤1% | ≥21 | |
| HJ-043 | 0.43±0.02 | 1000 | ≤1% | ≥24 | |
| HJ-045 | 0.45±0.02 | 1500 | ≤1% | ≥28 | |
| HJ-051 | 0.51±0.02 | 3000 | ≤1% | ≥56 | |
| HJ-054 | 054±0.02 | 4000 | ≤1% | ≥60 | |
| HJ-058 | 0.58±0.02 | 5000 | ≤1% | ≥85 | |
| HJ-063 | 0.63±0.02 | 6000 | ≤1% | ≥110 | |
| High performance Buoyancy |
HJ42H | 0.42±0.01 | 1500 | ≤1% | ≥30 |
| HJ45H | 0.45±0.01 | 2000 | ≤1% | ≥35 | |
| HJ48H | 0.48±0.01 | 3000 | ≤1% | ≥50 | |
| HJ51H | 0.50±0.01 | 4000 | ≤1% | ≥60 | |
| HJ54H | 0.54±0.01 | 5000 | ≤1% | ≥80 | |
| HJ56H | 0.56±0.01 | 6000 | ≤1% | ≥96 | |
| HJ58H | 0.58±0.01 | 7000 | ≤1% | ≥112 | |
| HJ63H | 0.63±0.01 | 9000 | ≤1% | ≥140 | |
| HJ68H | 0.68±0.01 | 11500 | ≤1% | ≥170 | |
