WOODWARD QuickTrip Electro-Hydraulic Trip Block Assembly

Woodward QuickTrip Electro-Hydraulic Trip Block Assembly

Product Overview and Core Advantages

The QuickTrip trip block components adopt a triple redundancy and fault-tolerant design, implementing a 2-out-of-3 voting mechanism to ensure safe operation of the system in the event of a single component failure. Its design goal is to quickly and reliably release the turbine trip oil circuit under extreme working conditions, suitable for applications that use hydraulic trip systems and have extremely high requirements for reliability and safety.

The main advantages include:

Mature and reliable technological foundation: based on Woodward's widely used CPC II and VariStroke I product technology platforms

SIL 3 safety level certification: independently evaluated by T Ü V and compliant with IEC 61508 and IEC 61511 standards

High dirt tolerance: suitable for turbine lubricating oil systems containing pollutants such as metal shavings, moisture, sludge, etc

Long life design: Designed for a lifespan of up to 20 years, it has undergone rigorous durability and environmental testing

Online testable and repairable: supports online diagnosis and modular maintenance, reducing downtime

Fault safety mode: Automatic tripping in case of power loss (fault activation)

Multiple status indication: local visual location indication and remote location feedback

Wide compatibility with fluid and explosion-proof certifications: suitable for mineral oil and synthetic hydraulic oil, with explosion-proof certifications in North America and Europe

Design Technology and Similarity Analysis

The design of QuickTrip is highly similar to Woodward's existing products CPC II (electro-hydraulic pressure regulating valve) and VariStroke I (linear electro-hydraulic actuator), with strong technical commonality. As of the publication of the manual, there have been over 3500 on-site application records of these two types of products, and the technology is mature and reliable.

Key Technology Comparison (Abstract):

Technical component CPC II VariStroke I QuickTrip feature description

Rotary hollow valve core ○● adopts the same rotary valve technology as VariStroke I, with low driving force, high flow rate, and high dirt tolerance

Outer sleeve component ○● Corrosion resistant stainless steel material

Dual bearing support ● ● Same as VariStroke I

Shaft seal ●● Same as CPC II and VariStroke I

Linear Torque Motor (LAT) adopts the same technology, but QuickTrip uses a larger LAT to provide greater driving force

Fault safety reset spring ● ● Using the same power spring technology, the spring material is thicker and the torque is higher

Window component QuickTrip has added new components, which have been validated through cyclic thermal testing, impact testing, and thermal shock testing from -40 ° C to+85 ° C

Safety Integrity Level (SIL) certification

QuickTrip has been independently evaluated by T Ü V and meets the following standards:

IEC 61508 Parts 1-2 and 4-7: 2010

IEC 61511 Parts 1-3:2004 (partial)

Key safety performance indicators:

PFDavg (average required failure probability): 9.44 × 10 ⁻⁶

MTBF (Mean Time Between Failures): 4950000 hours

MTBFD (Mean Time Between Failures): 70600000 hours

Hardware fault tolerance capability: 1 (any single fault will not cause downtime)

Under appropriate periodic verification testing, the product can maintain a service life of 20 years (including a storage period of 1.5 years) without maintenance.

Verification of dirt tolerance and durability

Pollution tolerance test:

QuickTrip completed validation testing in highly polluted hydraulic oil containing iron oxide and Arizona road dust without any tripping failures. Its corrosion-resistant materials, rotary valve design, and self-cleaning ports ensure reliable operation even in the presence of pollutants such as sludge, moisture, and metal shavings.

Durability life test:

Design life verification: Simulate daily tripping within 20 years (7300 times in total), and actually complete 21000 cycle tests (approximately 3 times the design life)

Ultra long life marginal test: completed an additional 1 million trip cycles, equivalent to over 2700 years of daily operation, with no abnormal wear on any key components (valve core, sleeve, spring, bearing, etc.)

Vibration and Shock Testing: Conducted in accordance with MIL-STD-810C (Shock) and MIL-STD-810F (Vibration) standards, with no faults or false tripping

Online testability and maintainability

Online testing:

In conjunction with Woodward ProTechTPS safety logic controller or MicroNet safety module, automatic diagnostic testing can be performed online to verify trip response time (<50ms) and achieve:

Regular health status check

Early fault detection

Trend analysis of trip performance

Online repair:

Modular design allows for online replacement of the following components (power off during maintenance):

Electromagnetic coil (LAT)

Electronic module (PCBA with position sensor)

Top cover/window

Bottom cover/reset spring

rotor

Product Support and Service Options

Woodward provides a multi-level technical support network:

Support channels:

OEM or system integrator: preferred source of support, especially when it comes to password protection programs or warranty services