Tracked ROV Buoyancy
| Density : | 0.39g/cm³ |
| Size : | 1300*1300*300mm |
| Depth : | 1000m |
| Application Areas : | Tracked ROV |
The buoyancy of a tracked ROV is far more than just a component providing buoyancy in engineering. It directly affects the stability, safety and operational capability of the entire machine.
Mainstream Materials and Selection for buoyancy
Tracked ROVs typically operate within a few hundred meters underwater.
Key technical points in the design of buoyancy
The design of buoyancy is far more than just choosing a lightweight material; it requires comprehensive consideration from the perspectives of structure, hydrodynamics, and long-term reliability:
Stability design is the core: The installation position of the buoyancy directly determines the center of buoyancy of the robot. For tracked ROVs, it is usually required that the center of buoyancy be above the center of gravity, forming a stabilizing moment similar to that of a "weeble", ensuring that the robot can automatically right itself after surfacing. However, there are also a few designs that pursue ultimate flexibility, allowing the center of gravity and the center of buoyancy to coincide, sacrificing self-stability for omnidirectional maneuverability.
Shape and frame matching:
Open frame: This is the most common form for tracked ROVs, featuring a simple structure that is easy to carry mission payloads. Using polymer frames (such as PP, HDPE) can effectively prevent corrosion and reduce weight.
Streamlined/closed frame: This can significantly reduce underwater resistance, increase speed and endurance, and is commonly found in models with higher maneuverability requirements. Some technical solutions directly use solid buoyancy materials to manufacture the outer shell, achieving an integrated structure-buoyancy design.
Protection and durability: All buoyancy foams are at risk of water absorption and physical impact. Therefore, the surface of the buoyancy is usually coated with polyurea or polyurethane elastomer to form a dense and tough protective layer, enhancing impact resistance, wear resistance, and creep resistance.
| 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 | |
