Shrink for steam turbine servomotors
A
Voith Turbo product story
Edited by the Engineeringtalk editorial team
Apr 22, 2005
High-pressure steam turbine servomotors can now be built even more compactly following the development of new servomotors where the stroke has been shortened from 120 to 60mm.
High-pressure steam turbine servomotors (H-DAKS) can now be built even more compactly following the development of new servomotors where the stroke has been shortened from 120 to 60mm.
As a result, the plate valve previously necessary for high oil flow volumes can be eliminated, saving components and increasing reliability.
Instead of the spiral spring needed for stroke reduction, cup springs with increased spring ratings and lower tolerances can be used.
Additionally, Voith Turbo has also improved the control behaviour and the fast closing function.
High-pressure servomotors are also suitable for applications at larger steam turbines.
At steam turbines, electrohydraulic Voith servomotors precisely and highly dynamically control the steam supply and, when necessary, also the bleeding of steam.
At a load increase during the turbine operation (trip), the control valve of a medium-size steam turbine need to shut safely within 300ms.
Larger steam turbines require even shorter closing times because of their higher mass flows.
The control valve of the newly developed high-pressure servomotors can be shut well within the required time of 300ms.
This fast reaction occurs without undershoot, which reduces the load on the valve seat.
Additionally, applications with gas turbines, where extremely precise fuel dosage is required, are now also possible.
For the first time, an improved pilot control has been implemented into the new Voith servomotors.
This pilot control which has been tested in numerous trials has a higher magnet force, while the current uptake stays the same.
Consequently, a harder control spring with higher energy storage can be used.
The result: especially in the small signal range, the control behaviour is more dynamic and more stable against friction influences and reactions of the hydraulic fluid.
The adherence to even closer production tolerances for the components of the hydraulic pilot valve has led to a considerable reduction of oil leakages from 4 to 2.5 litre/min.
This pays off for the operator, because it means that the hydraulic pumps can be designed with lower dimensions.
Another innovation is the option to use flame-resistant hydraulic fluids which results in more favourable premium payments for fire insurance contracts.
As an option, the new high-pressure servomotors are also available in explosion-proof design.
Not what you're looking for? Search the site.
Google Ads
Contact Voith Turbo
Related Stories
- Rodriguez releases latest Compacta geared motors
- Geeplus launches smallest voice coil motor
- Frequency inverter range available up to 22kW
- EISA-compliant motors now available in Europe
- Astrosyn develops DC motor for hostile conditions
Articles by product category
- Consultancy and Services (903)
- Machine Building (4,517)
-
Engineering Design Software (6,179)
- Engineering Design Software (12)
- 2D CAD software (200)
- 3D CAD software (1,157)
- FEA and structural analysis software (369)
- Fluid, thermal, noise, vibration software (334)
- Simulation, modelling, validation software (914)
- Rendering, visualisation, styling software (196)
- Materials design and moulding design software (151)
- Process, instrumentation, automation software (258)
- Electrical design software (164)
- Publishing and documentation software (229)
- Maths, charting, statistics, QA software (317)
- Data, document management software (310)
- CAM, CNC, production management software (568)
- File conversion software, data capture (351)
- PLM and collaboration software (649)
-
Drives, Motors and Controls (3,361)
- Drives, Motors and Controls (1)
- Precision Motors and Gears (411)
- Industrial Drives/Controls (1,276)
- Linear Drives and Motors (114)
- Industrial Motors (497)
- Stepper and Servo Drives, Motors, Controls (1,060)
- Small Mechanical Components, Joining, Tools (1,975)
-
Control and Instrumentation (5,028)
- Plantwide control (1,324)
- Plant- and Machine-Wide Communications (1,174)
- Smaller-Sized PLCs (387)
- CNC and Motion Controllers (184)
- Mid-range and Large PLCs (201)
- Power Supplies, Uninterruptible Power (562)
- HMIs/Operator Interfaces (294)
- Logic Controllers, Timers and Relays (96)
- Cabling, Conduit, Signal Conditioning (806)
-
Monitoring, Measurement and Quality (5,459)
- Monitoring, Measurement and Quality (1)
- Data acquisition Software and Communications (494)
- Data Acquisition Hardware and PC I/O Boards (472)
- Electrical and Electronic Testing, PAT Equipment (630)
- Form/co-ordinate, optical, vision instruments (703)
- Gauges, Indicators and Instruments (440)
- Data loggers (422)
- Materials testing equipment (421)
- Telecomms/network test equipment, software etc (154)
- Testing and Calibration Services and Information (500)
- Testing, analysing and monitoring equipment (1,222)
-
Electrical and Electronic Equipment Design (4,160)
- Batteries, chargers and circuit protection (555)
- Connectors, Terminals, Busbars, Slip Rings (679)
- Enclosures and Equipment Cooling Fans (709)
- Knobs, Handles and Enclosure Hardware (420)
- PCs and Embedded Systems (798)
- Electrical and Electronic Subassemblies (369)
- Electrical and Electronic Components (630)
-
Materials and Processing (2,963)
- Materials and Processing (5)
- Materials and components (2,215)
- Rapid Prototyping (458)
- Materials processing and testing (285)
-
Engineering Industry News, Resources (6,093)
- Engineering Industry News, Resources (4)
- Engineering Business News, Views (388)
- Engineering Exhibitions, Events (562)
- Engineering Conferences (425)
- Engineering Seminars (400)
- Engineering Industry Developments, Awards (633)
- Engineering Guides, Newsletters (349)
- Engineering Recruitment, Employment (219)
- Engineering Training Courses (433)
- Engineering Education, Resources, Standards (838)
- Engineering Industry Reports, Surveys (597)
- Electronic Resources for Engineers (278)
- Health and Safety Legislation (402)
- Health and Safety Strategy, Risk Assessment (113)
- Health and Safety Consultancy, Software (175)
- Health and Safety Events, Training, News (277)
-
Powertrain Design (3,598)
- Powertrain Design (2)
- Bearings (939)
- Chains and belts (326)
- Gears, brakes, couplings and engines (1,441)
- Hydraulic Components (471)
- Lubricants (418)
-
Capital Equipment (3,387)
- Capital Equipment (1)
- Manufacturing Machinery and Plant Equipment (468)
- Production line blowers and fans (62)
- Compressors and Air Treatment (510)
- Electronics Manufacturing, Tools, Instruments (192)
- Electrical hardware (131)
- Machinery and Production Equipment (1,093)
- Robotics, Handling and Storage (930)
-
Sensors (7,080)
- Sensors (8)
- Accelerometers and Vibration Sensors (427)
- Loadcells, Force Sensors, Torque Sensors (699)
- Pressure sensors (621)
- Flowmeters and Flow Sensors (618)
- Level Sensors and Leak Detectors (527)
- Linear Position Sensors (399)
- Rotary Position, Tilt and Angular Sensors (546)
- Proximity Sensors (700)
- Gas, Chemical, Radiation, Magnetic Sensors (284)
- Humidity and Environmental Sensors (152)
- Temperature sensors (612)
- Vision and Colour Sensors (1,384)
- Barcode Sensors (103)
- Valves, Pumps, Process Hardware (3,623)
