CN101514641A - Protection system for turbo machine and power generating equipment - Google Patents
Protection system for turbo machine and power generating equipment Download PDFInfo
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- CN101514641A CN101514641A CNA200910129919XA CN200910129919A CN101514641A CN 101514641 A CN101514641 A CN 101514641A CN A200910129919X A CNA200910129919X A CN A200910129919XA CN 200910129919 A CN200910129919 A CN 200910129919A CN 101514641 A CN101514641 A CN 101514641A
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Abstract
The invention relates to a protection system for turbo machine which detects abnormality through an abnormality detecting unit which has an emergency governor arranged on a rotary shaft of the turbo machine and a locking mechanism composed of a trip finger and a trip rod. The protection system comprises a detecting device made to mechanically detect movement of the trip rod so as to generate abnormal electric signals; a solenoid valve integrally arranged on a drive and discharging operation oil from a cylinder, wherein the drive is composed of a piston, a cylinder and a hydraulic system, the piston and cylinder open and close a steam valve, and the hydraulic system conveys the operation oil into the cylinder or discharges the operation oil from the cylinder. Based on the abnormal electric signals from the abnormal electric signals, the solenoid valve is run by electricity to discharge the operation oil in the cylinder so as to close the steam valve. The invention also relates to a power generation facility including the protection system for turbo machine, in which device constitution can be simplified, and in which reliability is improved.
Description
The application's dividing an application that be the denomination of invention submitted on September 22nd, 2004 for the Chinese invention patent application 200410082474.1 of " driver element of steam valve ".
Technical field
The present invention relates to the protective system of turbo machine, this protective system detects in power generating equipment such as the unusual of the turbo machine of steam turbine and turbo machine is stopped, and the invention still further relates to electricity generating device.
Background technique
Using such as in the electricity generating device of the turbo machine of steam turbine etc.; different protective systems is set; so that detect the phenomenon except that anomaly and fault; such as poor, the big vibration of the extension of steam turbine, the low head pressure, boiler/generator fault etc. of low oil pressure, main oil pump of high temperature, bearing in the low pressure exhaust chamber, meet accident or make preventing because the unexpected loss minimum that causes.In these phenomenons, the unusual increase of turbine speed is most important, therefore is provided with one and detects the protective system that turbine speed increases unusually and steam turbine is stopped.
In the existing protective system of turbo machine, the conveying means that utilizes fuel injection pressure signal is usually as device for signalling.Figure 11 has shown the structure of this protective system of turbo machine, and label 1 is represented emergency speed governor in the drawings, and label 2 expressions combine the urgent trip gear that is provided with emergency speed governor 1.Emergency speed governor 1 comprises the eccentric hoop (or ejecting pin) in the rotating shaft that is formed on steam turbine.And urgent trip gear 2 comprises the locking mechanism 5 that is made of trip finger 3 and trip rod 4.
Set rotating speed or higher when the rotating speed of steam turbine is raised to, also the eccentric hoop of the emergency speed governor in the rotating shaft that is formed on steam turbine 1 (or ejecting pin) is gone up and is produced centrifugal force, and eccentric hoop departs from machinery and moves.Become and equal a certain value or when bigger, eccentric hoop contact and the mobile locking mechanism 5 that is made of trip finger 3 and trip rod 4 with the trip finger 3 of urgent trip gear 2 when the machinery of eccentric hoop departs from (mechanical signal).As a result, trip rod 4 is by moving towards emergency speed governor 1 thruster, and it is detected that this machinery as trip rod 4 departs from (mechanical signal).The mechanical shut off valve 10 of the mobile quilt of the trip rod 4 of mechanical-type trip gear detects and converts to fuel injection pressure signal.
Oil pressure is passed to hydraulic drive mechanism or similar device by the hydraulic system that is made of blocking-valve 11, main shut off valve 12 etc., hydraulic drive mechanism drives unshowned main steam stop valve, thereby close main steam stop valve (for example, openly applying for No.Sho 61-114009) with reference to Japanese Utility Model.
In the existing protective system of aforesaid turbo machine, utilize the conveying means of oil pressure to be used as device for signalling, it is a system highly reliably.But, also have such problem, utilize oil pressure make device structure complicated, utilize high oil pressure will cause oil seepage and be restricted in improvement such as the aspect of performance of transfer rate.
Summary of the invention
The protective system and the power generating equipment that the purpose of this invention is to provide turbo machine, compared with prior art, they can simplified apparatus structure and raising reliability.
Protective system according to a kind of turbo machine of the present invention, it detects abnormal conditions by the abnormality detection unit, the locking mechanism that the abnormality detection unit has the emergency speed governor in the rotating shaft that is arranged on turbo machine and is made of trip finger and trip rod, make when the rotating shaft rotation of turbo machine is applied on the emergency speed governor above predetermined speed and predetermined value or bigger centrifugal force, emergency speed governor contacts with trip finger, locking mechanism throws off with mobile trip rod and cuts out the steam valve that is arranged on the turbo machine steam inlet, flows into turbo machine to cut off steam; It is characterized in that this protective system comprises: detection device, described detection device are made into and mechanically detect moving of trip rod, to produce the abnormal electrical signal; And the solenoid valve that is arranged on the driver element and discharges operation oil integratedly from cylinder interior, driver element is made up of piston and cylinder and hydraulic system, piston and cylinder open and close steam valve, and hydraulic system will move oil and be input to that cylinder interior/will move is oily discharges from cylinder interior; Wherein, based on the abnormal electrical signal from described detection device, described solenoid valve is started discharging the operation oil of cylinder interior by electricity, thus the steam off valve.
Protective system according to another kind of turbo machine of the present invention, it detects the abnormal conditions of turbo machine and produces the abnormal electrical signal by the abnormality detection unit, and the steam valve that is arranged on the turbo machine steam inlet according to the abnormal electrical signal at stop, flow into turbo machine to cut off steam, it is characterized in that described protective system comprises: be arranged on integratedly on the driver element and based on the solenoid valve of abnormal signal operation, driver element is by piston and cylinder, and hydraulic system is formed, piston and cylinder open and close steam valve, and hydraulic system will move oil and be input to that cylinder interior/will move is oily discharges from cylinder interior; And the cylindrical valve that is arranged on the oily passage and opens synergistically with the operation of described solenoid valve, piston one side of described oily passage from cylinder discharged operation oil and will move oil and be input to the piston opposite side in the cylinder once more and discharge operation subsequently oily.
According to a kind of power generating equipment of the present invention, it has by steam rotates so that the turbo machine of generating and the steam valve that is arranged on the turbo machine steam inlet, it is characterized in that this power generating equipment comprises: the protective system of turbo machine, it detects the abnormal conditions of turbo machine by the abnormality detection unit and produces the abnormal electrical signal and according to abnormal electrical signal at stop steam valve, flow into turbo machine to cut off steam; Wherein, the described protective system of turbo machine comprises: be arranged on integratedly on the driver element and based on the solenoid valve of abnormal signal operation, driver element is made up of piston and cylinder and hydraulic system, piston and cylinder open and close steam valve, and hydraulic system will move oil and be input to that cylinder interior/will move is oily discharges from cylinder interior; And the cylindrical valve that is arranged on the oily passage and opens synergistically with the operation of described solenoid valve, piston one side of described oily passage from cylinder discharged operation oil and will move oil and be input to the piston opposite side in the cylinder once more and discharge operation subsequently oily.
Driver element according to a kind of steam valve of the present invention, wherein, the valve rod of steam valve links together by the oil cylinder spring housing that inside has operating stem and operating spring with the piston that is arranged in cylinder, when opening steam valve, the operating stem that is contained in the oil cylinder spring housing moves to the valve open position by the restoring force that the piston in the oil cylinder overcomes operating spring, when the steam off valve, operating stem turns back to the valve closed position by the restoring force of operating spring, it is characterized in that this driver element comprises: be formed on oil cylinder spring housing bottom, and discharge is retained in the weep hole of inner water; And be installed to filter on the described weep hole.
Driver element according to another kind of steam valve of the present invention, wherein, the valve rod of steam valve links together by the oil cylinder spring housing that inside has operating stem and operating spring with the piston that is arranged in cylinder, when opening steam valve, the operating stem that is contained in the oil cylinder spring housing moves to the valve open position by the restoring force that the piston in the oil cylinder overcomes operating spring, when cut-off valve, operating stem turns back to the valve closed position by the restoring force of operating spring, it is characterized in that this driver element comprises: be arranged on the weep hole on the body flange, body flange is installed on the end of steam valve side of described oil cylinder spring housing and by penetrating the described operating stem of supporting.
Description of drawings
Fig. 1 shows the schematic representation of the structure of abnormality detection unit according to an embodiment of the invention.
Fig. 2 is the schematic representation of demonstration according to the structure of the driver element of the steam valve of this embodiment of the invention.
Fig. 3 is the schematic representation of schematic construction of outward appearance that shows the driver element of steam valve and steam valve.
Fig. 4 is the schematic representation of structure of improvement example that shows the driver element of steam valve shown in Figure 2.
Fig. 5 shows the schematic representation of the structure of abnormality detection unit according to another embodiment of the present invention.
Fig. 6 is the schematic representation that shows the structure of the power generating equipment that wherein is provided with turbo machine.
Fig. 7 is the schematic representation of demonstration according to the structure of the major component of the driver element of the steam valve of this embodiment of the invention.
Fig. 8 shows the schematic representation of the structure of the major component of the driver element of steam valve according to another embodiment of the present invention.
Fig. 9 shows the schematic representation of the structure of the major component of the driver element of steam valve according to another embodiment of the present invention.
Figure 10 shows the schematic representation of the structure of the major component of the driver element of steam valve according to another embodiment of the present invention.
Figure 11 is the schematic representation of structure that shows the existing protective system of turbo machine.
Figure 12 is the schematic representation of structure of major component that shows the existing driver element of steam valve.
Embodiment
Describe embodiments of the invention in detail hereinafter with reference to accompanying drawing.At first, with reference to Fig. 6 the power generating equipment that wherein is provided with turbo machine is described.Here, turbo machine is represented steam turbine.Protective system in following examples is arranged in the steam turbine, and being described among the corresponding embodiment of system as shown in Figure 6 is omitted.
In Fig. 6, label 100 expression boilers.Steam from boiler 100 passes through main steam stop valve 101 and steam control valve 102, so that work in high-pressure turbine 110.After this, steam is reheated by safety check 107 and in the reheater of boiler 100, and by reheating steam stop 103 and shutoff valve 104, to flow into medium pressure turbine 111 and low-pressure turbine 112, so that among them, work.Steam after working in low-pressure turbine 112 is recycled and turns back to condenser 113, is fed pump 114 pressurizations and supplies to boiler 100 once more.
And, in order to improve the operational efficiency of equipment, be connected to from the place ahead of main steam stop valve 101 according to the needs setting of equipment boiler 100 reheater the place ahead high-pressure turbine bypass valve 105 and be connected to low-pressure turbine bypass valve 106 of condenser 113 etc. from the rear of the reheater of boiler 100, and no matter whether there is the steam turbine running, can carries out the cycling of steam generator system itself.Here, be a typical steam turbine power generating equipment as shown in Figure 6, but it also can be by the Combined Cycle work of the not shown gas turbine in power generating equipment of combination as single monaxon or fountain type.
As mentioned above, need the different anomaly of earlier detection so that safe operation in steam turbine, in these anomalies, the unusual increase of steam turbine rotating speed is a most critical.Fig. 1 has shown the structure of the abnormality detection unit of this unusual increase that is used to detect the steam turbine rotating speed, and Fig. 2 has shown the structure of the driver element of the steam valve that cuts off the vapor stream that enters steam turbine.
In Fig. 1, label 1 expression emergency speed governor, label 2 expressions combine the urgent trip gear that is provided with emergency speed governor 1.Emergency speed governor 1 comprises the eccentric hoop (or ejecting pin) in the rotating shaft that is formed on steam turbine.And urgent trip gear 2 comprises the locking mechanism 5 that is made of trip finger 3 and trip rod 4.Set rotating speed or higher when the rotating speed of steam turbine is raised to, also the eccentric hoop of the emergency speed governor in the rotating shaft that is formed on steam turbine 1 (or ejecting pin) is gone up and is produced centrifugal force, and eccentric hoop becomes that machinery departs from and moves.Become and equal a certain value or when bigger, eccentric hoop contact and the mobile locking mechanism 5 that is made of trip finger 3 and trip rod 4 with the trip finger 3 of urgent trip gear 2 when the machinery of eccentric hoop departs from (mechanical signal).As a result, trip rod 4 is gone out towards emergency speed governor 1 thruster, and it is detected that this machinery as trip rod 4 departs from (mechanical signal).
Limit switch 6 is arranged on the end of the trip rod 4 that is pushed out, and limit switch departs from (mechanical signal) with the machinery of trip rod 4 and converts electrical signal to.At least one limit switch 6 is realized this purpose, but for example three limit switches of a plurality of limit switches 6 can be set, so that improve reliability.
In addition, in the system of Fig. 1, be provided with oil and disconnect solenoid valve 7, be used for supplying with oil when emergency speed governor 1 is worked, can move the mode of confirming test; And the solenoid valve 8 that resets, be used to use urgent trip gear 2 after test, to turn back to its initial position.And, also be provided with the handle 9 of triping, be used for when urgency, steam turbine promptly being stopped by manual operation.The handle of triping is made into by the front side that pulls to the people (the in the drawings upward to) locking mechanism 5 with mobile trip finger 3.
In having the equipment of said structure, it is mechanically detected and do not use the intervention of the conveying means of fuel injection pressure signal that the rotating speed of the steam turbine that is detected by emergency speed governor 1 increases, and is converted into electrical signal.
Electrical signal (contact signal) from limit switch is sent to unshowned sequence circuit device, and is sent to fast moving electromagnetic valve 21,23 driver element 20 that is arranged on steam valve 200 from the output electrical signal of sequence circuit device.The various important device of the steam that flows into steam turbine of cutting off when unusual are appearring in fast moving electromagnetic valve 21,23rd.Therefore, the electrical signal that is applied to fast moving electromagnetic valve 21,23 is applied in the constant excitation state when steam turbine normally moves, and is applied in nonexcited state such as when limit switch 6 work and from sequence circuit device transmission electrical signal the time occurring when unusual.
And there is following method in the method as obtaining further reliability.At first, a kind of method is that a plurality of for example two fast moving electromagnetic valves 21,23 are set.In this case, as supplying to fast moving electromagnetic valve 21 from the electrical signal of sequence circuit device output, 23 method, have and a kind of electric wire is connected in series to two fast moving electromagnetic valves 21,23 method and a kind of electric wire that is connected in parallel are so that apply the method that same signal is given each fast moving electromagnetic valve 21,23 simultaneously.Under the situation that electric wire in parallel connects, have and a kind ofly set priority so that apply simultaneously or start the method for not moving second when carrying out, a kind ofly set order so that the method for their alternate runs and a kind of to have the method that a little time difference applies signal (owing to when reality is unusual, do not encourage, it mean with a little time difference discharge electromagnetism) mutually at first.
And, also have and in each fast moving electromagnetic valve 21,23, adopt a plurality of for example two internal coil 22,24 ( coil 22a, 22b and coil 24a, methods 24b).When having two internal coil, have a kind of two coils that are connected in series and apply the method for same signal to give each coil simultaneously with method and a kind of two coils that are connected in parallel that form series connection.Under the situation that electric wire in parallel connects, have and a kind ofly set priority so that apply simultaneously or start the method for not moving second when carrying out, a kind ofly set order so that the method for their alternate runs and a kind of to have the method that a little time difference applies signal (owing to when reality is unusual, do not encourage, it mean with a little time difference discharge electromagnetism) mutually at first.
And, relevant coil 22,24 electric wire connects, because they are encouraged in normal course of operation consistently, for example set and apply magnitude of voltage (or current value) or to be set at the magnitude of voltage of giving each coil 50% etc. by applying magnitude of voltage by 100%, prolonged the working life of coil 22,24.About the structure of these coils 22,24, except said structure, can adopt any structure, as long as it can obtain the working life of reliability and prolongation.
Then, will the structure of driver element 20 parts of steam valve 200 shown in Figure 2 be described.Steam valve 200 is represented for example main steam stop valve, has the built-in sub-valve of steam flow rate when being used to control startup etc., and has the mechanism that can use servovalve control valve position.Vapor pressure works in the upstream of main valve 201, and in the bottom cylinder 204 of the driven plunger 202 that is connected with main valve 201 oil accumulation, make oil pressure work in the bottom of driven plunger 202, open main valve 201 thereby overcome vapor pressure.On the other hand, occur when unusual at steam turbine, accumulate in the oil in the bottom cylinder 204 of driven plunger 202 by discharge, main valve 201 will be closed.
Here, along with the power (output power) of steam turbine significantly increases, the main valve diameter of these steam valves 200 increases, and the trend that increases vapor pressure is also arranged.Therefore, supply to the preferably high oil pressure of oil pressure of driver element 20, so that show key property, such as the driving force that drives steam valve 200 with the feature of quick closedown when unusual occurs.This oil pressure is 3Mpa or higher preferably, and preferably 11Mpa, 17Mpa, 35Mpa or higher high oil pressure.
In Fig. 2, the operation oil of supplying with from unshowned hydraulic generator 25 flows into by the oil strainer 26 that is positioned at driver element 20 inlets, and is divided into two oil circuit footpaths that are connected in the driver element 20.
A tributary supplies to servovalve 27, be used as the function of the steam flow rate control of steam valve 200, the operation oil 25 that flows through servovalve 27 according to the valve position control signal from unshowned steam turbine control gear is supplied to the bottom of driven plunger 202 and the A mouth (master) of cylindrical valve 28,29 simultaneously.Driven plunger 202 is carried out opening by the operation oil 25 that flows through servovalve 27.Servovalve 27 is controlled from the control signal of unshowned steam turbine control gear by receiving at coil 35 places, and is used for upstream side branch and process special oil filter 38 supplies of the control oil of servovalve 27 from oil strainer 26.
Another tributary is divided into two branches once more in driver element 20, and is connected to the fast moving electromagnetic valve 21,23 that is arranged on the respective lines subsequently.Because fast moving electromagnetic valve 21,23 is in excited state in normal course of operation, operation oil 25 flows through corresponding fast moving electromagnetic valve 21,23 and supplies to the primary side of connected cylindrical valve 28,29 respectively.Flow through servovalve 27 and supply to the operation oil 25 of cylindrical valve 28,29 masters and the operation oil 25 that flows through fast moving electromagnetic valve 21,23 and supply to cylindrical valve 28,29 primary side works simultaneously on the valve disc 30,31 of cylindrical valve 28,29.Therefore, power is balanced between them, makes the valve disc 30,31 of cylindrical valve 28,29 not move.
Here, when detecting unusual in abnormality detection unit shown in Figure 1 and when limit switch 6 produced electrical signal, this signal was sent to sequence circuit device.Be sent to the fast moving electromagnetic valve 21,23 in the driver element 20 of the steam valve 200 that is arranged on as shown in Figure 2 from the output electrical signal of sequence circuit device.
When the fast moving electromagnetic valve 21,23 that is in the constant excitation state became nonexcited state, the operation oil 25 that flows through fast moving electromagnetic valve 21,23 and supply to cylindrical valve 28,29 primary side was so far worked in coordination with at 32 places with fast moving electromagnetic valve 21,23 and is discharged from.Therefore, the hydraulic coupling of operation oil 25 that cylindrical valve 28,29 is flow through servovalve 27 and supplies to cylindrical valve 28,29 masters makes the A mouth move and opens to pusher.As a result, the operation oil that accumulates in the bottom cylinder 204 of the driven plunger 202 on the A mouth same line with cylindrical valve 28,29 is discharged from the B mouth of cylindrical valve 28,29, makes steam valve 200 close.
At this moment, as shown in Figure 2, because cylindrical valve 28,29 B mouth is connected to the top cylinder 205 of the upper position of the driven plunger 202 that is positioned at driver element 20, flow in the top cylinder 205 of the driven plunger 202 in the cylinder 203 from the operation oil of the B mouth of cylindrical valve 28,29, be discharged from by the top cylinder 205 of driven plunger 202 and at 32 places.Like this, by in case the operation oil that allows to accumulate in the bottom cylinder 204 of the driven plunger 202 in the cylinder 203 flow in the top cylinder 205 of driven plunger 202, form an operation that promotes driven plunger 202 downwards, this also as the work of oil extraction case, makes steam valve 200 to close sooner and definitely.
In the primary side of cylindrical valve 28,29, comprise the Returnning spring 33,34 of the valve disc 30,31 that is used for cylindrical valve 28,29.When the oil pressure on the A of cylindrical valve 28,29 mouth disappeared, the valve disc 30,31 of cylindrical valve 28,29 automatically returned to buttoned-up status by the power of Returnning spring 33,34, to cover the A mouth.
Relevantly supply to this oil of driven plunger 202 through servovalve 27 at fast moving electromagnetic valve 21,23 when nonexcited state work, servovalve 27 can be activated by the control signal from unshowned steam turbine control gear to cut off the supply of operation oily 25.And, when fast moving electromagnetic valve 21,23 is worked, servovalve 27 can be operated, so that oil process servovalve 27 is from discharging with the A mouth same line of cylindrical valve 28,29, to help the quick closedown operation of steam valve 200, that is, help oil to discharge from the bottom cylinder 204 of driven plunger 202.
And when fast moving electromagnetic valve 21,23 turned back to the excitation operation once more, oil can be supplied to through servovalve 27 once more by the control signal from unshowned steam turbine control gear.
Fig. 3 has shown the schematic structure of the outward appearance of steam valve 200, is provided with the cylinder (oil cylinder) 203 that wherein holds driven plunger 202 (not shown among Fig. 3) at steam valve 200 downsides.Fast moving electromagnetic valve 21,23 grades of above-mentioned driver element 20 are arranged on the lateral part of cylinder 203 integratedly.On the top of cylinder 203, oil cylinder spring housing 210 is set, they constitute driver element 20.In driver element 20 as shown in Figure 3, oil cylinder spring housing 210 is arranged on the downside of steam valve 200 by link 211, and the valve rod 212 of steam valve 200 is connected on the joiner 213, and joiner 213 forms in the tip portion of oil cylinder spring housing 210 outstanding.The height of steam valve 200 for example approximately is three meters, and its diameter for example approximately is two meters.
In this embodiment, the unusual increase by emergency speed governor 1 and urgent trip gear 2 mechanically detects the rotating speed of steam turbine, its testing signal converts electrical signal to by limit switch 6 and is sent to the driver element 20 of steam valve 200, and does not use the intervention of the conveying means of fuel injection pressure signal.Therefore, compared with prior art, but the simplified apparatus structure can not take place to mismatch such as the secondary of oil seepage, therefore the multiplication of the minimizing of response time and abnormal detecting device and anomaly detection signal is easy, has improved reliability.And existing emergency speed governor that exists 1 and urgent trip gear 2 can be used for forming protective system, and making does not need the huge change of equipment.
Driver element 20 in the steam valve 200 as shown in Figure 2 is one and comprises servovalve 27 and the driver element with valve position control function.But,, have a kind of steam valve with simple on according to the purposes of steam valve.The driver element 40 that has shown steam valve 300 among Fig. 4 with simple on.In addition, same numeral is used for representing to have with Fig. 2 the parts of identical function, omits it and is repeated in this description.
Driver element as shown in Figure 4 is the driver element that replaced of as shown in Figure 2 servovalve 27 tested solenoid valves 36 wherein, and in constant nonexcited state work.Test solenoid valve 36 is energized when valve test, carry out valve test and be in order to prevent the valve rod attachment phenomenon of steam valve 300 in the normal course of operation, and 36 work of test solenoid valve in case by the oil in the bottom cylinder 304 of discharging driven plunger 302 gradually the main valve 301 of steam off valve 300.After the main valve 301 of steam valve 300 is closed fully, be transformed into nonexcited state by testing solenoid valve 36, open main valve 301 once more gradually, thereby finish valve test.And when test solenoid valve 36 was converted to nonexcited state when main valve 301 in the valve test process is closed to the centre opening degree, after this main valve 301 work so that opened fully.In other words, according to the motivational techniques of test solenoid valve 36, can select the semi-closed test of main valve 301 or close test fully.
Then, with reference to Fig. 5 another embodiment is described.In embodiment as shown in Figure 1, when being raised to, the rotating speed of steam turbine sets rotating speed or higher, and machinery departs from detected and converts electrical signal to.On the other hand, this embodiment directly detects the steam turbine rotating speed and converts it to electrical signal.
On the rotating shaft 110a of steam turbine 110, the gear 50 with about 100 wheel teeth is installed.Relative with gear 50, assemble an electromagnetic pick-up 51, so that form a combination with gap a little of big approximate number millimeter with gear 50.According to the rotating speed of steam turbine, obtain sinusoidal frequency output from electromagnetic pick-up 50, and this output is sent to unshowned relatively calculation control device.
In calculation control device relatively, frequency is converted into voltage or numeral and compares and calculate with predetermined set rotating speed equivalence, and the rotating speed of steam turbine is by being judged as abnormal state like this.Subsequently, when it equals to set rotating speed when equivalent or bigger, be applied to fast moving electromagnetic valve 21 in as shown in Figure 2 the driver element that is arranged on steam valve 200 20 from the signal of calculation control device relatively, 23 or the driver element that is arranged on steam valve 300 40 as shown in Figure 4 in fast moving electromagnetic valve 21,23, make them when appearance is unusual, be transformed into nonexcited state.Therefore, steam valve 200 and steam valve 300 are closed.
In addition, at least one electromagnetic pick-up 51 is realized this purpose, but a plurality of for example three electromagnetic pick-ups 51 can be used for improving reliability.And a plurality of relatively calculation control devices by one group of a plurality of electromagnetic pick-up being set and combining with this group can improve from the reliability of the output signal that compares calculation control device output.
In the above-described embodiments, the unusual situation about increasing of the rotating speed that detects steam turbine has been described.But, in steam turbine, when except the rotating speed of steam turbine is unusual increasing other phenomenon such as such as poor, the big vibration of the extension of steam turbine, the low head pressure, boiler/when generator fault etc. occurs of low oil pressure, main oil pump of high temperature, bearing in the low pressure exhaust chamber, the vapor stream that enters steam turbine must be cut off, to prevent to meet accident or to make because the unexpected loss minimum that causes.
This system also can be made into, make and pass through sequence circuit device or comparison calculation control device according to the specification of the electrical signal that detects from the electrical signal that detects these unusual abnormal detecting devices, and be applied to fast moving electromagnetic valve 21 subsequently, 23 with steam off valve 200 and steam valve 300, and does not use the intervention of the conveying means of fuel injection pressure signal.
In the aforesaid embodiment of the invention, because the testing signal that detects the abnormal state of turbo machine does not use the intervention of the conveying means of fuel injection pressure signal as the electrical signal transmission, but simplified apparatus structure compared with prior art, can not take place to mismatch such as the secondary of oil seepage, the multiplication of the minimizing of response time and abnormal detecting device and anomaly detection signal is easy, has therefore improved reliability.
And the driver element 20 that drives steam valve 200 is made into as shown in Figure 3.Relevant driver element 20 needs enough Mechanical Reliabilities.The internal production of the oil cylinder spring housing 210 of driver element 20 becomes to have dish type operating spring 214 as shown in figure 12, is arranged to penetrate operating stem 222, top board 219 and the spring support 220 of dish type operating spring 214 as critical piece.
When operating stem 222 will be when the direction of opening valve upwards pushes away, be sent to piston (not shown among Figure 12) in the cylinder 203 along the oil pressure of the direction of opening valve, its hydraulic coupling upwards promotes operating stem 222.On the other hand, when operating stem 222 will be when being directed downwards of cut-off valve pushes away, oil pressure flows into discharges side, and the restoring force of the operating spring 214 that shrinks when valve cuts out promotes operating stem 222 downwards.
Do not consider that water enters the inboard when aforesaid oil cylinder spring housing 210 designs, therefore, when water entered, it remained in inside owing to this structure, and this may cause the damage of operating spring 214.
As the reason that water enters oil cylinder spring housing 210 inboards, following two kinds of conceivable reasons are arranged.First kind of conceivable reason is, driver element 20 that wherein oil cylinder spring housing 210 and cylinder 203 be arranged on the structure of steam valve 200 downsides as shown in Figure 3 betransported when being placed on the open air or at driver element 20, deposits, installs when having, under the condition of detection etc., rainwater is retained in the recess 230 that is formed by upper flange body 218 and top board 219.Second kind of conceivable reason be, because the draining from the steam of the sliding parts ejection of valve rod 212 is retained in the recess 230 during steam turbine operation.
When water is retained in the recess 230 that is formed by upper flange body 218 and top board 219 owing to these reasons, water is by being arranged on operating stem through hole on the top board 219 and the gap between the operating stem 222 (promptly, sliding parts) progresses into inside, and contact with operating spring 214.
The material that forms the operating spring 214 of cup spring is to make by having high-intensity high tensile steel, wherein brittle fracture can occur owing to hydrogen embrittlement when being exposed in the water for a long time.Hydrogen embrittlement is a kind of like this process, makes to form iron oxide by the chemical reaction with water, and Hydrogen Separation comes out and enter grain boundary to cause embrittlement.In cup spring, brittle crack appears at the starting point on the high back of the body surface, inboard of tensile stress, and this may cause damaging.If operating spring 214 is damaged, the restoring force of operating spring 214 can not work fully, and this may cause the operation troubles of steam valve 200.And for example, steam valve 200 can not be closed when appearance is unusual.
Therefore, the countermeasure of taking not allow oil cylinder spring housing 210 be exposed to for a long time in the wet environment is the important goal of not corroding/damaging operating spring.Therefore, the driver element of the steam valve that these problems are wherein solved below will be described.
In oil cylinder spring housing 210 as shown in Figure 7, first countermeasure of taking is that restriction water enters the inboard, second countermeasure is that discharge is retained in inboard water and the 3rd countermeasure is to prevent because the corrosion of operating spring/damage hinders the opening of valve, if they take place.
At first, first countermeasure will be described.This countermeasure is that anti-sealing is retained in and is formed in upper flange body 218 and the recess 230 between the top board 219 of the upper end portion of oil cylinder spring housing 210.The radial pattern weep hole 216 that recess 230 and outer peripheral portion branch are interconnected is formed on the flange portion 217 of upper flange body 218, and forms projection 221 to pass part around the operating stem that is positioned at top board 219 cores.
By on the flange portion 217 of upper flange body 218, forming weep hole 216, even rainwater or because steam enters recess 230 from the draining of the sliding parts of the valve rod 212 of steam valve 200 ejection, it is not retained in the recess 230, but flows out by weep hole 216.And, by forming projection 221, can suppress water and flow into from the part of passing of operating stem 222 to pass part around the operating stem that is positioned at top board 219 cores.
Then, second countermeasure will be described.This countermeasure is to be arranged at oil cylinder spring housing 210 that its lowest position on base plate 215 forms one or more downward weep holes 226 under the situation of vertical position.If weep hole 226 can not be formed on the bottom surface of base plate 215, towards lower side surface that the weep hole (not shown) of side is formed on the side surface of base plate 215 or is positioned at oil cylinder spring housing 210 near on the part of base plate 215.In either case, the size of weep hole 226 preferably allows water freely to fall at least so that the size that is discharged from, and for example diameter approximately is 5mm or bigger.
According to second countermeasure, the water that enters oil cylinder spring housing 210 inside flows downward owing to gravity, and is discharged to the outside of oil cylinder spring housing 210 by weep hole 226.
And, the 3rd countermeasure below will be described.By Fig. 7 and Figure 12 more as can be seen, this countermeasure is to have adopted spring support 228 in this embodiment, the internal diameter of its diameter and oil cylinder spring housing 210 is approximate the same big.
Like this, it is approximate the same big by the size of spring support 228 is set for the internal diameter of oil cylinder spring housing 210, the bottom cup spring 214 that if possible is exposed to wet environment easily is corroded/damages, and spring support 228 can receive the sizable fragment of spring, and this approximately is several centimetres.
As a result, can prevent that the spring fragment from falling the bottom of oil cylinder spring housing 210, thereby avoid because the obstruction of the cup spring that damages between oil cylinder spring housing 210 and spring support 228 hinders valve to move.In addition, the damage of several dishes is not weakened function as spring, make cup spring still work.
Then, with reference to Fig. 8 another oil cylinder spring housing is described.Difference between Fig. 8 and Fig. 7 is, in Fig. 7, and the link 211 vertical settings of oil cylinder spring housing 210 and cylinder 203 downside by being positioned at steam valve 200, and they are horizontally disposed with in Fig. 8.In Fig. 8, as taking first and second countermeasure among Fig. 7 similarly.In addition, as mentioned above, device structure can be simplified in embodiment illustrated in fig. 2, and entire equipment can be done compactly, make shown in Fig. 7 and 8 level and be arranged vertically and can freely adopt.
First countermeasure and Fig. 7 are as broad as long, because weep hole 216 and projection 221 are formed on body flange 218 and the top board 219.In second countermeasure, because oil cylinder spring housing 210 is horizontally disposed with, the position that forms weep hole is different slightly.Particularly, as shown in Figure 8, two weep holes 226 are formed on horizontally disposed oil cylinder spring housing 210 position relative with ground along long side direction.
The size of weep hole 226 for example diameter approximately is 5mm or bigger.On each weep hole 226, install and for example have about 100 purpose filters 227.In addition, when forming not downward weep hole, that is, for example when being positioned at top, shut-off plug 228 is installed owing to the convenience weep hole that oil cylinder spring housing 210 is installed.
In this case, the water that enters oil cylinder spring housing 210 inside flows downward owing to gravity, and is discharged to oil cylinder spring housing 210 outsides by weep hole 226.Therefore, the operating spring 214 that is positioned at oil cylinder spring housing 210 inside will can not be exposed to wet environment for a long time, prevent the corrosion/damage of operating spring 214 effectively.
By filter 227 is installed, weep hole 226 can not cause owing to the expansion/contraction of the operating spring 214 of following the valve operation sucking foreign material from the outside by weep hole 226.And owing to have this structure, the operating spring 214 that is positioned at oil cylinder spring housing 210 inside can not be exposed to wet environment for a long time, can prevent the corrosion/damage of operating spring 214.
Then, with reference to Fig. 9 another oil cylinder spring housing is described.Fig. 9 is near the vertical sectional view of body flange that shows the oil cylinder spring housing.Fig. 9 has shown the improvement to first countermeasure, wherein, is fixed to joiner 213 such as an end of the elastomeric cap 229 of bellows, and with the part of passing of the operating stem 222 that covers top board 219, its other end is fixed on the upper flange body 218.Structure among other structure and Fig. 7 does not have special difference.
Therefore, space between joiner 213 and upper flange body 218 is covered by elastomeric cap 229, the equipment that makes be placed on the open air or the operation, the transportation or maintenance process in, prevent in the recess 230 that foreign material and water from the outside rests on top board 219, and also can prevent steam turbine operation the time since steam be retained in the recess 230 from the draining that the sliding parts of valve rod sprays.
Then, with reference to Figure 10 another oil cylinder spring housing is described.Figure 10 is the vertical sectional view that shows oil cylinder spring housing bottom.In Figure 10, be on the outer surface of bottom that banded waterproof outer surface heater 240 is wrapped in oil cylinder spring housing 210, waterproof internal surface heater 241 in the form of sheets is wrapped on the internal surface of bottom of oil cylinder spring housing 210, making valve body and valve driver element to move and can be not frozen, be in 0 ℃ or the lower environment even be arranged on low temperature.
Therefore, by outer surface heater 240 or internal surface heater 241 are set,, can prevent that sealing is frozen in inside on oil cylinder spring housing 210 even water enters the inside of the oil cylinder spring housing 210 that uses in cold zone.Therefore, operating stem 222 can according to from the instruction true(-)running of cylinder 203 upwards pushing away or to push away downwards, thereby do not hinder the operation of steam valve 200.And, when water enters neither when cool region is also not in the oil cylinder spring housing 210 at low-temperature condition, still can start heater to increase the temperature in the oil cylinder spring housing 210, make water evaporation and discharge before the corrosion of cup spring takes place, thereby inside is always kept dry by weep hole 226.
In addition, by being installed in the filter 227 on the weep hole 226 by the metal manufacturing or on filter 227, applying the water-sensitive agent, the function that can provide identification filter 227 whether to contact with water in the oil cylinder spring housing 210.
Adopt filter 227, to enter oil cylinder spring housing 210 inner and by being installed to filter 227 on the weep hole 226 when being discharged to the outside when water, and rust by filter 227 surfaces or change in color can be confirmed and the contacting of water.
Therefore, in the time can not in maintenance process, directly confirming the entering of water, can confirm whether water enters oil cylinder spring housing 210 inside in the past.When rust or change in color appear on the surface of filter 227, can carry out the maintenance of the situation of the inner and operating spring 214 of oil cylinder spring housing 210, to prevent damaging operating spring 214 owing to corroding.And filter 227 and the shut-off plug 228 that is installed on the weep hole 226 also can be removed, to carry out the maintenance of oil cylinder spring housing 210 inside.
And rust proof paint can be coated on the operating spring 214, if feasible water enters oil cylinder spring housing 210 inside and contacts with operating spring 214, operating spring 214 is not easy to get rusty.
And rust proof paint and rust preventive material also can be used for oil cylinder spring housing 210 inner and other assemblies, can improve the water resistence of oil cylinder spring housing inside.In addition, as mentioned above, the situation that operating spring 214 wherein is made of cup spring has been described, but cup spring can by other spring for example helical spring substituted.
Claims (24)
1; a kind of protective system of turbo machine; it detects abnormal conditions by the abnormality detection unit; the abnormality detection unit has the emergency speed governor in the rotating shaft that is arranged on turbo machine; with the locking mechanism that constitutes by trip finger and trip rod; make the rotating shaft rotation of working as turbo machine surpass predetermined speed; and when predetermined value or bigger centrifugal force are applied on the emergency speed governor; emergency speed governor contacts with trip finger; locking mechanism is thrown off with mobile trip rod; and close the steam valve that is arranged on the turbo machine steam inlet; flow into turbo machine to cut off steam, this protective system comprises:
Detection device, described detection device are made into and mechanically detect moving of trip rod, to produce the abnormal electrical signal; And
Be arranged on integratedly on the driver element and and discharge the oily solenoid valve of operation from cylinder interior, driver element is made up of piston and cylinder and hydraulic system, piston and cylinder open and close steam valve, and hydraulic system will move oil and be input to that cylinder interior/will move is oily discharges from cylinder interior;
Wherein, based on the abnormal electrical signal from described detection device, described solenoid valve is started discharging the operation oil of cylinder interior by electricity, thus the steam off valve.
2, the protective system of turbo machine as claimed in claim 1 is characterized in that, also comprises:
Piston one side from cylinder is discharged operation oil and will be moved the oily passage that oil is input to the piston opposite side in the cylinder once more and discharges operation oil subsequently; And
The cylindrical valve that is arranged on the described oily passage and opens synergistically with the operation of described solenoid valve;
Wherein, the described opposite side of piston in the cylinder is discharged and be input to the described side of the piston of operation oil from cylinder, with the steam off valve.
3, the protective system of turbo machine as claimed in claim 2 is characterized in that, a plurality of described solenoid valves and a plurality of described cylindrical valve are set respectively.
4, the protective system of turbo machine as claimed in claim 1 is characterized in that, described solenoid valve comprises a plurality of drive coils.
5, the protective system of turbo machine as claimed in claim 1 is characterized in that, described driver element comprises:
Be arranged in the valve rod of steam valve and the operating stem between the piston;
During the steam off valve described operating stem is moved to the operating spring of valve closed position; And
Hold the oil cylinder spring housing of described operating stem and described operating spring, the oil cylinder spring housing comprises the weep hole that is positioned at the bottom, and weep hole is discharged and is retained in inner water.
6, the protective system of turbo machine as claimed in claim 5 is characterized in that, described weep hole comprises filter.
7, the protective system of turbo machine as claimed in claim 5 is characterized in that, also comprises the weep hole that is arranged on the body flange, and body flange is installed on the end of steam valve side of described oil cylinder spring housing and by penetrating the described operating stem of supporting.
8, the protective system of turbo machine as claimed in claim 1 is characterized in that, also comprises the projection on every side that is formed on the penetrating component that is positioned at described operating stem on the body flange sidepiece.
9, the protective system of turbo machine as claimed in claim 7 is characterized in that, also comprises:
The joiner that is formed on end of described operating stem and is connected with valve rod; And
One end is fixed on the described joiner, the other end is fixed on the body flange and cover the elastomeric cap of the penetrating component of described operating stem.
10, the protective system of turbo machine as claimed in claim 5 is characterized in that, rust proof paint is applied on the described operating spring.
11, the protective system of turbo machine as claimed in claim 5; it is characterized in that; cup spring is as described operating spring, and the external diameter of its spring support is roughly the same with the internal diameter of described oil cylinder spring housing at least, the bottom of falling described oil cylinder spring housing with the spring that prevents to damage.
12, the protective system of turbo machine as claimed in claim 5 is characterized in that, also comprises the heater on the inside that is arranged on described oil cylinder spring housing and outer surface are one of at least, and heater prevents that the water that rests on described oil cylinder spring housing inside from freezing.
13, a kind of protective system of turbo machine; it detects the abnormal conditions of turbo machine and the steam valve that produces the abnormal electrical signal and be arranged on the turbo machine steam inlet according to the abnormal electrical signal at stop by the abnormality detection unit; flow into turbo machine to cut off steam, described protective system comprises:
Be arranged on integratedly on the driver element and based on the solenoid valve of abnormal signal operation, driver element is made up of piston and cylinder and hydraulic system, piston and cylinder open and close steam valve, and hydraulic system will move oil and be input to that cylinder interior/will move is oily discharges from cylinder interior; And
The cylindrical valve that is arranged on the oily passage and opens synergistically with the operation of described solenoid valve, piston one side of described oily passage from cylinder are discharged operation oil and will moves oil and be input to the piston opposite side in the cylinder once more and discharge operation subsequently oily.
14, the protective system of turbo machine as claimed in claim 13 is characterized in that, a plurality of described solenoid valves and a plurality of described cylindrical valve are set respectively.
15, the protective system of turbo machine as claimed in claim 13 is characterized in that, described solenoid valve comprises a plurality of drive coils.
16, the protective system of turbo machine as claimed in claim 13 is characterized in that, also comprises:
Be arranged in the valve rod of steam valve and the operating stem between the piston;
During the steam off valve described operating stem is moved to the operating spring of valve closed position; And
Hold the oil cylinder spring housing of described operating stem and described operating spring, the oil cylinder spring housing comprises the weep hole that is positioned at the bottom, and weep hole is discharged and is retained in inner water.
17, the protective system of turbo machine as claimed in claim 16 is characterized in that, described weep hole comprises filter.
18, the protective system of turbo machine as claimed in claim 16 is characterized in that, also comprises the weep hole that is arranged on the body flange, and body flange is installed on the end of steam valve side of described oil cylinder spring housing and by penetrating the described operating stem of supporting.
19, the protective system of turbo machine as claimed in claim 18 is characterized in that, also comprises the projection on every side that is formed on the penetrating component that is positioned at described operating stem on the body flange sidepiece.
20, the protective system of turbo machine as claimed in claim 18 is characterized in that, also comprises:
The joiner that is formed on end of described operating stem and is connected with valve rod; And
One end is fixed on the described joiner, the other end is fixed on the body flange and cover the elastomeric cap of the penetrating component of described operating stem.
21, the protective system of turbo machine as claimed in claim 16 is characterized in that, rust proof paint is applied on the described operating spring.
22, the protective system of turbo machine as claimed in claim 16; it is characterized in that; cup spring is as described operating spring, and the external diameter of its spring support is roughly the same with the internal diameter of described oil cylinder spring housing at least, the bottom of falling described oil cylinder spring housing with the spring that prevents to damage.
23, the protective system of turbo machine as claimed in claim 16 is characterized in that, also comprises the heater on the inside that is arranged on described oil cylinder spring housing and outer surface are one of at least, and heater prevents that the water that rests on described oil cylinder spring housing inside from freezing.
24, a kind of power generating equipment, it has by steam rotates so that the turbo machine of generating and be arranged on the steam valve of turbo machine steam inlet, and this power generating equipment comprises:
The protective system of turbo machine, it detects the abnormal conditions of turbo machine by the abnormality detection unit and produces the abnormal electrical signal and according to abnormal electrical signal at stop steam valve, flow into turbo machine to cut off steam;
Wherein, the described protective system of turbo machine comprises:
Be arranged on integratedly on the driver element and based on the solenoid valve of abnormal signal operation, driver element is made up of piston and cylinder and hydraulic system, piston and cylinder open and close steam valve, and hydraulic system will move oil and be input to that cylinder interior/will move is oily discharges from cylinder interior; And
The cylindrical valve that is arranged on the oily passage and opens synergistically with the operation of described solenoid valve, piston one side of described oily passage from cylinder are discharged operation oil and will moves oil and be input to the piston opposite side in the cylinder once more and discharge operation subsequently oily.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP330071/2003 | 2003-09-22 | ||
| JP2003330071A JP2005098319A (en) | 2003-09-22 | 2003-09-22 | Apparatus for driving valve, and valve having the same |
| JP2004126394A JP4693360B2 (en) | 2004-04-22 | 2004-04-22 | Turbomachine safety equipment and power generation equipment |
| JP126394/2004 | 2004-04-22 |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100824741A Division CN100507220C (en) | 2003-09-22 | 2004-09-22 | Protection system for turbo machine and power generating equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101514641A true CN101514641A (en) | 2009-08-26 |
| CN101514641B CN101514641B (en) | 2012-06-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910129919XA Active CN101514641B (en) | 2003-09-22 | 2004-09-22 | Protection system for turbo machine and power generating equipment |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2005098319A (en) |
| CN (1) | CN101514641B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102454433A (en) * | 2010-10-14 | 2012-05-16 | 株式会社东芝 | Steam valve apparatus |
| CN103808513A (en) * | 2012-11-15 | 2014-05-21 | 中国广东核电集团有限公司 | Offline testing device of emergency security mechanism of nuclear power station turbine |
| CN104105847A (en) * | 2012-02-17 | 2014-10-15 | 三菱日立电力系统株式会社 | Single-casing steam turbine and single-shaft combined-cycle power generation apparatus |
| CN105378231A (en) * | 2014-02-19 | 2016-03-02 | 三菱重工压缩机有限公司 | Vapor valve and vapor turbine |
| CN106812558A (en) * | 2017-01-05 | 2017-06-09 | 武汉船用机械有限责任公司 | A kind of revolution speed control device of steam turbines |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015224749A (en) * | 2014-05-29 | 2015-12-14 | 株式会社東芝 | Steam valve driving device, steam valve |
| JP7321201B2 (en) | 2021-03-18 | 2023-08-04 | 三菱重工業株式会社 | steam valve |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4343454A (en) * | 1980-06-26 | 1982-08-10 | General Electric Company | Apparatus for individual isolation of hydraulically actuated valves |
| JP3267510B2 (en) * | 1996-06-06 | 2002-03-18 | 日華化学株式会社 | Auxiliary agent for leather dyeing |
| JP3786524B2 (en) * | 1998-08-18 | 2006-06-14 | 株式会社東芝 | Steam valve control device |
-
2003
- 2003-09-22 JP JP2003330071A patent/JP2005098319A/en active Pending
-
2004
- 2004-09-22 CN CN200910129919XA patent/CN101514641B/en active Active
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102454433A (en) * | 2010-10-14 | 2012-05-16 | 株式会社东芝 | Steam valve apparatus |
| CN102454433B (en) * | 2010-10-14 | 2015-01-14 | 株式会社东芝 | Steam valve apparatus |
| CN104105847A (en) * | 2012-02-17 | 2014-10-15 | 三菱日立电力系统株式会社 | Single-casing steam turbine and single-shaft combined-cycle power generation apparatus |
| CN104105847B (en) * | 2012-02-17 | 2015-11-25 | 三菱日立电力系统株式会社 | Unit room type steam turbine and single-shaft variant combined cycle generating unit |
| US9334757B2 (en) | 2012-02-17 | 2016-05-10 | Mitsubishi Hitachi Power Systems, Ltd. | Single-casing steam turbine and combined cycle power plant of single-shaft type |
| CN103808513A (en) * | 2012-11-15 | 2014-05-21 | 中国广东核电集团有限公司 | Offline testing device of emergency security mechanism of nuclear power station turbine |
| CN105378231A (en) * | 2014-02-19 | 2016-03-02 | 三菱重工压缩机有限公司 | Vapor valve and vapor turbine |
| CN105378231B (en) * | 2014-02-19 | 2017-04-05 | 三菱重工压缩机有限公司 | Steam valve and steamturbine |
| US9670794B2 (en) | 2014-02-19 | 2017-06-06 | Mitsubishi Heavy Industries Compressor Corporation | Steam valve and steam turbine |
| CN106812558A (en) * | 2017-01-05 | 2017-06-09 | 武汉船用机械有限责任公司 | A kind of revolution speed control device of steam turbines |
| CN106812558B (en) * | 2017-01-05 | 2018-10-23 | 武汉船用机械有限责任公司 | A kind of revolution speed control device of steam turbines |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2005098319A (en) | 2005-04-14 |
| CN101514641B (en) | 2012-06-13 |
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