Marine propulsion transmission and power Systems, Marine Propulsion and Transmission and Ship Engine test rigs

We provide test solution for marine engines, propulsion systems, electric motors, generator sets, transmission gearboxes, auxiliary power systems, exhaust gas systems, and spare parts for ships.

Marine propulsionControl and management the manufacturing processes in the field of marine propulsion is paramount! Our test benches are capable to handle full range of marine gearboxes with hybrid systems, brakes whether integrated or external, shaft lines and controllable or fixed pitched propellers

1.Combined propulsion System & Power Transmission Test stands:

Marine propulsion transmission Combined power transmission，which refers to flexible and dynamic applications that achieve multi-engine parallel operation, switching operation, and separation operation through transmission devices. so based on integrated Marine propulsion transmission systems, we have further developed the Cross Connect Gearing (CCG) power transmission system. This system connects the port and starboard systems via cross-connect transmission, enabling any single main engine to drive both propellers simultaneously, allowing dynamic switching between operational modes.

2.Planetary Gear/Planetary gearbox Transmission Test bench：

Through long-term technological research and development, we have overcome various design challenges related to high power and high rotational speed, and have developed and established a high-power, so two-stage marine planetary gear/gearbox transmission back-to-back test system, successfully completing full-speed, full-load back-to-back testing, the largest marine planetary gearbox in China for the first time. This system has resulted in the creation of over 10 patented technologies.

3.Transmissions gearbox electric closed power loop test stands:

Marine propulsion transmission systems and gearbox is tested using a motor drive, the motor loading in an

electric power closed-loop configuration.

Technical Features:

-Electric power closed-loop saves energy, with power consumption

approximately equal to the gearbox’s power loss.

-The test can be conducted with load, while also simulating dynamic loading.

-Reduces the need for other types of loading systems.

We have our own facilities, capable of conducting open-load tests up to 4MW, and we have the conditions for building a 20MW mechanical power closed-loop test bench.

4.Multifunctional Bearing Test Bench：

The design includes complete specialized equipment, with full system design capabilities. It has the ability to conduct tests for various radial bearings, and synchronous loading for double-rotor bearings. It integrates functions such as axial force, radial force, dynamic excitation loading, and environmental temperature simulation for high-speed rotors.

5. Marine component test benches and drive coupling test bench:

The all-metal flexible coupling validation test system can perform axial, angular, and torsional stiffness tests, as well as stress distribution tests, under both static and dynamic conditions. It can also conduct fatigue assessment tests for couplings tests, on the impact of axial and angular misalignment on shaft vibration.

-Static stiffness test bench for couplings -Fatigue test rigs system for elastic torque transmission components -Static torsional stiffness testing rigs for couplings

-Dynamic torsional stiffness test bench for couplings

-Dynamic stress test bench for couplings Coupling fatigue and vibration testing system

6.Ship Transmission Components test rigs multi-disc clutches/brake testing test benches:

The synchronous automatic clutch is a fully automatic, one-way overrunning clutch that transmits power through gear elements. It automatically engages or disengages, based on the rotational speed difference between two ends, without any external control. The synchronous automatic clutch test system, can simulate various combined (alternate transmission) conditions, while verifying the dynamic performance, load capacity of multiple synchronous automatic clutches. The variable-speed clutch validation test system can conduct: dynamic tests on clutches at different speeds to verify their clutching functionality. The 150 MW synchronous automatic clutch test system is designed for dynamic testing of high-power clutches, verifying their engagement and disengagement functions.

7.Ship vibration and noise test solution：

Noise and vibration testing and analysis systems for marine, Successful noise and vibration management reduces environmental impact and mitigates risks enabling a safer vessel.

We have full vibration reduction and noise control solution for ship power transmission systems, which able to cover vibration and noise testing, analysis, and simulation for rotating machinery, as well as vibration and noise control measures for equipment. We have rich design experience and techniques in vibration reduction and noise control, and can undertake tasks such as equipment vibration and noise reduction design, vibration isolation measures design, sound absorption and isolation design, and perform vibration noise simulation calculations.

We possess advanced data acquisition products from top international companies such as BK, LMS, Bently, with over 200 channels, as well as more than 300 imported sensors, including accelerometers, velocity sensors, displacement sensors, microphones, and various specifications of force hammers, exciters, etc. We can conduct tests on equipment vibration, modal analysis, sound pressure level, sound intensity, sound power, and more, in accordance with relevant standards. We can also perform sound source identification tests and impedance tests.

8.Marine EMC/EMI testing, Electromagnetic Interference Testing (EMI) and Electromagnetic compatibility(EMC) in Marine industry:

Electronics are fundamental to various marine operations, such as navigation, communication, propulsion, and onboard system management. However, the unique challenges of the maritime environment significantly impact electromagnetic compatibility (EMC).

EMI Challenges in the Marine Setting Compact and Complex Shipboard Systems

Due to limited space on ships, electrical and electronic equipment is often installed in close proximity. This close arrangement increases the risk of electromagnetic coupling, potentially causing electromagnetic interference (EMI). Furthermore, the interconnected structure of shipboard power systems adds complexity to managing and mitigating EMI.

High Electromagnetic Noise Levels
The marine environment is inundated with electromagnetic noise, which generated by equipment such as radio transmitters, radar systems, propulsion units, and communication devices. These powerful electromagnetic fields can interfere with nearby systems, leading to performance degradation and operational risks.

Harsh Environmental Conditions and Vibration
Marine equipment faces constant exposure to corrosive saltwater, severe mechanical vibrations, and fluctuating temperatures. These harsh conditions can impair the performance of electrical and electronic components, making them more vulnerable to EMI.

The Role of EMI Testing in the Marine Industry

Electromagnetic interference (EMI) testing plays a critical role in maintaining the functionality, safety, and reliability of shipboard systems. Key benefits of EMI testing include:

Ensuring Performance and Reliability
EMI testing identifies and addresses potential interference sources, helping to maintain optimal performance of shipboard systems.

Enhancing Safety in Navigation and Communication
Reliable communication and navigation are vital for safe maritime operations. EMI testing ensures these systems remain free from interference, reducing the risk of operational failures and ensuring the safety of the crew, passengers, and vessel.

Protecting Mission-Critical Systems
By identifying and mitigating interference, EMI testing safeguards navigation and communication equipment, ensuring that mission-critical systems operate seamlessly in challenging marine conditions.

In Conclusion:

In the maritime industry, EMC/EMI testing is essential for ensuring the electromagnetic compatibility of shipboard equipment, our EMC test system consists of anechoic chamber, shielding chamber, soundproof chamber, EMC measurement instruments and etc.

The testing process involves two critical components: emissions testing and immunity testing.

Emissions testing focuses on measuring the electromagnetic energy emitted by a device. This step identifies any potential interference that could impact nearby electronic systems and ensures the device complies with established regulatory standards for electromagnetic emissions.

On the other hand, immunity testing assesses the device’s ability to withstand external electromagnetic fields. This evaluation determines how effectively the device can resist interference from other electronic systems.

Together, these two testing methods are essential for ensuring item can function safely and reliably in environment, where electromagnetic sources are abundant.