Sxm90 Shaftless Underwater Rim-Driven Thruster (RDT)

The SXM90 Shaftless Underwater Rim-Driven Thruster (RDT) features an innovative shaftless, open-center architecture engineered for challenging underwater missions. Eliminating central shafts, it prevents debris entanglement and reduces noise (<45dB). Equipped with composite mechanical sealing, ceramic bearings, and CFD-optimized hydrodynamics, this compact RDT delivers high-efficiency, continuous propulsion for ROVs and AUVs.

 

 

1: ​​​​​​Challenging Waters and Continue Operation

In challenging waters, the real test is not whether it spins, but whether it keeps running.

Removing the central shaft also changes the structural conditions created by a conventional shaft assembly.

 

 

2: ​​​​​​Shaftless construction, comparisons, advantages, and CFD flow optimization

Removing the central shaft also changes the structural conditions created by a conventional shaft assembly.

Reducing entanglement means more than blocking debris. It means changing the structural conditions that cause it.

Hydrodynamic design optimized for stable propulsion

 

 

3: Composite sealing

An invention patent application for the core sealing technology has been published by the China National Intellectual Property Administration (CNIPA).

 

 

4: Applications

Marine Inspection. Water Infrastructure Inspection. Energy Infrastructure Inspection

 

1:ROV Inspection

Subsea Pipelines. Wind Turbine Foundations. Port Infrastructure Inspection

Reduced Entanglement Risk. Fewer Mission Interruptions

 

2: Autonomous Underwater Vehicles(AUVS)

Long-Endurance Autonomous Platforms Continuous. Stable Propulsion for Extended Missions

 

3: River & Waterway Operations

Challenging Waters. Vegetation. Sediment

 

 

5: Specifications

 

 

1: Thruster architecture comparison for challenging waters.

Rim-Driven Thruster (RDT) offers shaftless anti-entanglement design, composite sealing, low noise (<45dB), and highly integrated long-life propulsion.

 

Feature	Conventional Shaft-Driven Thruster	SXM90 Shaftless Thruster
Central Shaft	Present	None
Flexible Debris Entanglement	Shaft Assembly Can Entangle Debris	Reduced by Design
Sealing	Conventional Dynamic Seals	Composite Mechanical Sealing
Drive Train	Conventional Shaft Drive	Highly Integrated Drive
Long-Term Operation	Shaft Wear and Maintenance Demands	Integrated Drive + Long-Life Lubrication
Mechanical Noise	Shaft-Related Mechanical Noise	<45 dB*
Integration	Separate Drive Components	Integrated Motor, Blades and Duct

 

2：SXM90 Series

 

Parameter	SXM90MS1	SXM90MS2	SXM90LS
Thrust	14 kg	14 kg	18 kg
Rated Power	1080 W	1080 W	1080 W
Operating Voltage	AC 24–48 V	AC 24–48 V	AC 24–48 V
Dimensions	Ø96×121 mm	Ø96×121 mm	Ø96×76 mm
Weight	1.1 kg	1.1 kg	0.7 kg
Rated Depth	200 m	200 m	500 m
Sand Resistance	Yellow River	River Water	Swimming Pool
Service Life	3080 h	2080 h	1080 h

 

6: FAQ

 

1. Q: What are the rated depth and operating voltage of the SXM90 series?

A: Rated depth is 200m or 500m with an operating voltage of AC 24-48V.

2. Q: How does the composite mechanical sealing protect against sand ingress in rivers?

A: Multiple protective layers prevent sediment entry, ensuring high reliability in sand-laden water.

3. Q: What thrust and power output can we expect from this thruster module?

A: It delivers 14kg to 18kg thrust with a 1000W rated power output.

4. Q: Is the shaftless design compatible with custom subsea robotics and OEM integration?

A: Yes, it offers high integration, compact dimensions, and full structural customization support.

5. Q: What is the expected service life and sand resistance test background?

A: Service life ranges from 1000 to 3000 hours, tested in rigorous Yellow River conditions.

 

Welcome to consult if you are looking for shaftless underwater Rim-Driven Thruster(RDT). Thanks.

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