CN102203475A - Fluid valve drive mechanism - Google Patents
Fluid valve drive mechanism Download PDFInfo
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- CN102203475A CN102203475A CN2009801432654A CN200980143265A CN102203475A CN 102203475 A CN102203475 A CN 102203475A CN 2009801432654 A CN2009801432654 A CN 2009801432654A CN 200980143265 A CN200980143265 A CN 200980143265A CN 102203475 A CN102203475 A CN 102203475A
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- Prior art keywords
- support portion
- spring
- axle
- upper support
- lower support
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/36—Safety valves; Equalising valves, e.g. pressure relief valves actuated in consequence of extraneous circumstances, e.g. shock, change of position
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D17/00—Regulating or controlling by varying flow
- F01D17/10—Final actuators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D17/00—Regulating or controlling by varying flow
- F01D17/20—Devices dealing with sensing elements or final actuators or transmitting means between them, e.g. power-assisted
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D21/00—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for
- F01D21/16—Trip gear
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/22—Fuel supply systems
- F02C7/232—Fuel valves; Draining valves or systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
- F16K31/047—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor characterised by mechanical means between the motor and the valve, e.g. lost motion means reducing backlash, clutches, brakes or return means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/56—Mechanical actuating means without stable intermediate position, e.g. with snap action
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
Abstract
A fluid valve drive mechanism provided with a drive means and an emergency drive means. The emergency drive means comprises an upper support section connecting to the drive means and ascending and descending, a lower support section connecting to a valve element, a spring provided between both the support sections, and an emergency cancelling unit capable of fixing the distance between the upper support section and the lower support section. The upper support section is caused to descend by the drive means from an initial state in which the valve element is in contact with a valve seat and the spring is compressed by a predetermined length between both the support sections. This compresses the spring to a predetermined length, and after that, the distance between the upper support section and the lower support section is fixed by the emergency cancelling unit. With the spring kept compressed between the upper support section and the lower support section, opening and closing of the valve is controlled by causing the valve element to ascend and descend by the drive means. In an emergency case, the emergency cancelling unit is released to allow the spring to stretch to drive the fluid valve as an emergency measure.
Description
Technical field
The present invention relates to valve control and use driving mechanism, relate in particular to the emergency safety device of the flow control valve of the fuel supply in the gas-turbine plant.
Background technique
Gas turbine technology is used as core technology in the LNG compound power-generating that obtains developing rapidly because of high efficiency power generation characteristics (combined cycle (combined cycle)).In recent years, preventing that the global warming countermeasure from being looked does important in the world problem, the significance of the efficient power generation technology in the more thermal power generation of CO2 emissions obtains understanding day by day, the technological development of the further high efficiency that rising brought of gas turbine temperature (combustion temperature) is developed, in recent years, other large-scale efficient power generation equipment of 1500 ℃ of levels of gas turbine temperature also comes into operation.Therefore, improve the fuel supply of supplying with to gas turbine for control the fuel fluid valve control reliability and realize that the reliable failure protection function when urgent becomes important problem just gradually.
Control shown in Figure 12 is to the example of the existing fluid valve driving mechanism of the fuel supply of gas turbine supply.This device has clack box 508, framework 507, spring box 506 and is used as fixing part, is fixed with the hydraulic actuator 501 as drive unit on the top of this spring box 506.Spool 509 in the clack box 508 links with hydraulic actuator 501 through valve rod 510, connecting rod 503, output shaft 502, and output shaft 502 is driven up and down the hydraulic coupling by not shown hydraulic pressure supply unit so that spool 509 liftings, thus the aperture of modulating valve.Have its upper end in the spring box 506 and be fixed in the helical spring 504 on spring box top, spring seat 505 is fixed in the free-ended lower end of the conduct of helical spring 504, and spring seat 505 links with connecting rod 503.Constitute: under the original state that does not act on hydraulic coupling, helical spring 504 becomes the state that is compressed predetermined length, make keep spool 509 with predetermined pressing force by the valve closed condition that is pressed on the valve seat.When turning round usually, by the driving force of hydraulic actuator 501, spring seat 505 is risen with compression helical spring 504, thereby carry out the opening and closing operations of valve through output shaft 502, connecting rod 503.Have urgent blocking-up mechanism, when this mechanism was blocked in the fault hydraulic coupling because of hydraulic pressure installation, by the spring reaction power of helical spring 504, force revert was the valve closed condition, relies on outside driving force ground valve is not blocked.
In addition, the urgent blocking-up mechanism about the fluid valve that makes the type that spool moves forward and backward discloses following prior art.
International the operation equipment that No. 02/35123 communique discloses a kind of steam valve disclosed, this operation equipment especially is used in steam turbine, spool is moved forward and backward to carry out the switching of valve, can promptly block by discharging disc spring (disc spring) 21 stored elastic energies.This device has the pressure head 49 of the pressure accumulater 7 that is made of disc spring 21 and spring collet 19, the drive portion 5 that engages with spring collet 19.When the common use of this device, the electromagnetic force that is produced with 13 energisings of the electromagnetic coil in pressure head 49 is adsorbed on the pressure head 49 to fix spring collet 19 magnetic force, maintain under the state with 21 compressions of the disc spring in the spring collet 19, carry out the opening and closing operations of valve.Have a kind of mechanism, this mechanism stops the energising of the electromagnetic coil 13 in the pressure head 49 when urgency, and spring collet 19 is removed with the magnetic force absorption of pressure head 49, with disc spring 21 relievings of pressure accumulation, through valve rod 3 spool is advanced, and steam valve is promptly blocked.In addition, a kind of operation equipment of steam valve is disclosed, in order to relax valve when promptly blocking, the impact energy that spool and valve seat are applied that the advancing rapidly of spring caused, this operation equipment is not fixed the valve rod 3 and pressure head 49 direct mechanical of drive portion 5, but valve rod 3 is connected on the following movable actuator plate 67, this movable actuator plate 67 is configured to the state that moves on can the direction of valve work in the confined chamber that is filled with the wet goods fluid, when valve rod 3 is mobile rapidly, can absorb impact energy by be divided into the resistance that the fluid in the two-part confined chamber moves with movable actuator plate 67.
International the shifting facilities that No. 2004/076899 communique relates to valve disclosed, it discloses a kind of shifting facilities of valve, the opening and closing operations of the valve when this device can carry out based on the common rotation that moves forward and backward of the valve rod 4 that is undertaken by the rotation of drive unit 2,3 and be stored in the urgent blocking-up that the elastic energy of helical spring 14 carries out by release.In this device, axle with the thread structure that is connected with drive unit is threaded with the rear end of upholding rod-type cylindrical shell 16, in upholding rod-type cylindrical shell 16, have the spring 14 of its rear end at cylindrical shell 16 internal fixation, the front end of spring 14 is connected with flange, this flange is connected with valve rod, and this valve rod is connected with spool 23.During the common use of shifting facilities, flange retreats and becomes state with spring 14 compression, between flange front end and cylindrical shell 16 front ends, exist and trigger (toggle) mechanism 10,11, keep the state that spring 14 is compressed by the triggering connecting rod that is maintained elongation state by latch 18.When turning round usually, remain at spring 14 under the state of compression, make axle 2,3 rotations that cylindrical shell 16 is moved forward and backward by drive unit, valve is opened and closed.When urgency, will by pullback spring latch 18 be retracted towards the blocking-up of the power supply of electromagnetic coil 27, trigger mechanism 10,11 is crooked and make spring 14 elongations, makes spool move to the valve blocking position by elastic energy.
Japanese kokai publication hei 08-232607 communique discloses the steam turbine valve that can move to closing direction fast when urgent blocking-up.In this valve, make the driving mechanism 14 of spool 24 actions comprise motor 16, magnetic coupling 18, ball screw 20, accumulator (accumulator) 28.The lining 20a that constitutes ball screw 20 is connected with motor 16 through magnetic coupling 18, and the front end that constitutes the bar 20b of ball screw 20 is connected with the base portion of valve rod 22.Between the lip part 26 of the front end of this bar 20b and lining 20a, be assembled with the accumulator 28 that constitutes by spring.Drive motor 16 is to make lining 20a rotation through magnetic coupling 18, by while making electric storage means 28 pressure accumulations, bar 20c being risen valve is opened, when urgent, by disconnecting magnetic coupling 18, while lead to pressure accumulation accumulator 28 make lining 20a rotation, make bar 20c decline, valve is blocked fast.
The present invention relates to a kind of fluid valve driving mechanism; this mechanism has the structure that is difficult to be subjected to from the heat affecting of the spool that contact with the high temperature fluid (fuel) that flows in fuel control valve in the fuel control valve of gas turbine, and have the high failure protection function of reliability that can with powerful pressing force spool promptly be blocked when urgent when having compact simple structure.
Description of drawings
Fig. 1 is the synoptic diagram of facing of the fluid valve driving mechanism that relates to of embodiment 1.
Fig. 2 is the side-looking synoptic diagram of the fluid valve driving mechanism that relates to of embodiment 1.
Fig. 3 is the synoptic diagram of the original state (state after the urgent blocking-up) of the fluid valve driving mechanism that relates to of expression embodiment 1, is from the observable summary sectional view of facing of the section 3-3 of Fig. 2.
Fig. 4 is the partial enlarged drawing of expression spring retaining mechanism.
Fig. 5 is illustrated in the figure that live axle in the fluid valve driving mechanism that embodiment 1 relates to drops to precalculated position, magnetic clutch closing state.
Fig. 6 is the synoptic diagram that is illustrated in the state of the common valve operation of magnetic clutch work in the fluid valve driving mechanism that embodiment 1 relates to.
Fig. 7 is the local amplification view of expression damping of shocks mechanism.
Fig. 8 represents linear guide mechanism, is the observable amplification view of section 8-8 from Fig. 2.
Fig. 9 be the fluid valve driving mechanism that relates to of embodiment 2 face the summary sectional view.
Figure 10 is the block bearing of the live axle of the fluid valve driving mechanism that relates to of embodiment 2, the amplification view of upper spring case part.
Figure 11 is the summary pie graph of the accumulation load detection unit of the fluid valve driving mechanism that relates to of embodiment 2.
Figure 12 is the synoptic diagram that is illustrated in an example of the control valve for fluids that uses in the existing gas turbine.
Embodiment
The present invention is a kind of fluid valve driving mechanism, the spool 12 of fluid valve is moved forward and backward with respect to valve seat, described fluid valve driving mechanism has drive unit 1 and emergency drive device, described emergency drive device comprises spring unit (spring assembly) and emergency unchaining unit (spring holding device) 100, described spring unit comprises spring 6, spring upper support portion (upper spring case) 4, spring lower support portion (lower spring case) 5 and be configured in described spring upper support portion 4 and described spring lower support portion 5 between spring 6, described spring upper support portion 4 is connected with drive unit 1, described spring lower support portion 5 is connected with spool 12, described emergency unchaining unit 100 can be with the fixed interval between described spring upper support portion 4 and the described spring lower support portion 5, described drive unit 1 makes 4 liftings of described spring upper support portion, from described spool 12 and valve seat butt, described spring 6 has been compressed the original state of predetermined length from free length between described spring upper support portion 4 and described spring lower support portion 5, interval by dwindling described spring upper support portion 4 and described spring lower support portion 5 is compressed to described spring 6 after the predetermined length, fix the interval of described spring upper support portion 4 and described spring lower support portion 5 by described emergency unchaining unit, by driving described drive unit 1, under the situation of the state that keeps having compressed described spring 6 between described spring upper support portion 4 and the described spring lower support portion 5, make described spool 12 liftings, thereby the switching of control valve, when urgency, promptly drive, so that remove interval fixing of the described spring upper support portion 4 that undertaken by described emergency unchaining unit 100 and described spring lower support portion 5, described spring 6 extends from compressive state, through described spring lower support portion 5 described spool 12 is descended, described spool 12 is pressed on described valve seat, promptly drive thus, make described fluid valve is closed.
In the further mode of execution of fluid valve driving mechanism of the present invention, be characterised in that, described emergency unchaining unit 100 comprises: emergency unchaining unit shaft 104, and it runs through the axle upper support portion of being fixed in described spring upper support portion 4 and is fixed in the axle lower support portion of described spring lower support portion 5 and extends; With spring-loaded portion fixed interval device 101, it can be fixed the mutual relative position of described axle upper support portion, described axle lower support portion and described emergency unchaining unit shaft 104.
In the further mode of execution of fluid valve driving mechanism of the present invention, be characterised in that, described emergency unchaining unit shaft 104 is the axles 104 with thread structure, side in described axle upper support portion and the described axle lower support portion is a nut 111, and screw togather with described axle 104, the opposing party in described axle upper support portion and the described axle lower support portion is a block bearing 107, under the state that described axle 104 is rotated, described axle 104 axially on fix with respect to the described the opposing party in described axle upper support portion and the described axle lower support portion, can described spring-loaded portion fixed interval device 101 be rotate control device 101, can this rotate, and 101 pairs of control devices can carry out the state in relative rotation between described axle 104 and the described nut 111 and the state in relative rotation that can not carry out between described axle 104 and the described nut 111 switches, by relatively rotating of described axle 104 and described nut 111, can change the interval of described spring upper support portion 4 and described spring lower support portion 5, under described axle 104 states that can rotate, by acting between described spring upper support portion 4 and the described spring lower support portion 5, by the pressing force of described drive unit 1 generation or the spring reaction power of described spring, described axle 104 and described nut 111 are relatively rotated, in the movable range of described spring upper support portion 4 and described spring lower support portion 5, make the interval variation of described spring upper support portion 4 and described spring lower support portion 5.
In the further mode of execution of fluid valve driving mechanism of the present invention, be characterised in that described axle 104 with thread structure is ball screw axles 104, described nut 111 is ball nuts 111.
In the further mode of execution of fluid valve driving mechanism of the present invention, be characterised in that can the described control device 101 that rotate be magnetic clutchs 101.
In the further mode of execution of fluid valve driving mechanism of the present invention, be characterised in that, described emergency drive device also comprises linear guide device (linear guide) 200, and these linear guide device 200 channeling conducts are so that the direction that described spring upper support portion 4 and described spring lower support portion 5 move forward and backward with respect to described spool 12 and sliding glibly.
In the further mode of execution of fluid valve driving mechanism of the present invention, be characterised in that, described emergency drive device has relief means 300 between described spring lower support portion 5 and described spool 12, relax the lifting rapidly of described spool 12 by the fluid resistance of the contained fluid 301 of described relief means 300.
In the further mode of execution of fluid valve driving mechanism of the present invention, be characterised in that to have: main frame 3, it fixes described drive unit 1, and has described emergency drive device in inside; With heat-insulating frame 8, it is arranged between the clack box and described main frame 3 that comprises spool 12, has hollow structure, also has heat insulation joint 7 between described heat-insulating frame 8 and described main frame 3.
In the further mode of execution of fluid valve driving mechanism of the present invention, be characterised in that described drive unit 1 is directly moving drive unit (hydraulic linear actuating motor).
In the further mode of execution of fluid valve driving mechanism of the present invention, be characterised in that, described drive unit 1 is a rotating driving device (electric actuator, electrical servo motor) 24, the joint of live axle 2 that is rotated in the driving force by described rotating driving device and described spring upper support portion 4 has the straight manual converting mechanism of rotation (live axle lifting nut) 23, and the rotation of the straight manual converting mechanism 23 of described rotation by live axle 2 makes 4 liftings of described spring upper support portion.
In the further mode of execution of fluid valve driving mechanism of the present invention, be characterised in that, described rotating driving device is an electrical servo motor 24, described fluid valve driving mechanism also has accumulation load evaluating device 400, described accumulation load evaluating device 400 has the rotation detecting (encoder) 401 of the rotation that detects described electrical servo motor 24 and detects the drive current sensor 404 of the electric current that drives described electrical servo motor 24, calculate by the long-pending of described drive current sensor 404 detected motor thrusts and this rotating speed and accumulate, under the accumulated value situation bigger, give the alarm than predetermined value.
The fluid valve driving mechanism that the present invention relates to is described with reference to the accompanying drawings.
(embodiment 1)
Fig. 1, Fig. 2 be the fluid valve driving mechanism that the present invention relates to embodiment 1 face synoptic diagram, side-looking synoptic diagram, Fig. 3 illustrates from the observable summary sectional view of facing of the cross section A-A of Fig. 2.
Be fixed with drive portion 1 on the top of main frame 3, drive portion 1 is supplied with and is used for going up the driving force that drives spool 12 at above-below direction (direction that spool is moved forward and backward with respect to valve seat) in clack box 13.The bottom of main frame 3 is connected with heat-insulating frame 8 through heat insulation joint 7, and the bottom of heat-insulating frame 8 is connected with clack box 13.In main frame 3, have upper spring case 4 and lower spring case 5, between upper spring case 4 and lower spring case 5, be provided with helical spring 6.Lower spring case 5 is connected with valve rod 11 through connecting rod 10, and the spool 12 in valve rod 11 and the clack box 13 is connected.Drive portion 1 is connected with upper spring case 4 through live axle 2.
Fig. 4 represents the amplification view of spring keeping unit (emergency unchaining unit) 100.Spring keeping unit 100 comprises the block bearing 107 that is fixed in upper spring case 4 through upper bracket (bracket) 106 separately, and block bearing 107 can keep ball screw axle 104 rotatably.Possess magnetic clutch 101 on the top of block bearing 107, the armature (armature) 103 of magnetic clutch 101 is fixed in the upper end 112 of ball screw axle 104.Magnetic clutch 101 is fixed in upper bracket 106, and described upper bracket 106 is fixed in upper spring case 4.Spring keeping unit 100 comprises the ball nut 111 that is fixed in lower spring case 5 through lower support frame 110 separately, and this nut 111 screws togather with the screw section 105 of corresponding respectively ball screw axle 104.
The embodiment's 1 of the fluid valve driving mechanism that the present invention relates to according to the action explanation of fluid valve feature constitutes below.
At original state (Fig. 3), do not apply the driving force that produces by drive portion 1, to magnetic clutch 101 energisings, this clutch 101 is not an off state, ball screw axle 104 is can be with respect to the state of ball nut 111 rotations.In addition, helical spring 6 is states (upper spring case 4 and lower spring case 5 be the state of length L 1 shown in Figure 3 at interval) of the extreme length in the movable range of upper spring case 4 in the main frame and lower spring case 5.In addition, spool 12 for by helical spring 6 with predetermined pressure by the valve closed condition that is pressed on the valve seat.
From this original state drive portion 1 is driven, live axle 2 downward directions are moved, lower spring case 4 is depressed.Spool 12 contacts with valve seat, and lower spring case 5 can't descend, so the position of lower spring case 5, connecting rod 10, valve rod 11 can not change, and upper spring case 4 is compression helical springs 6 on one side, on one side the limit drop to precalculated position (Fig. 5).Ball screw axle 104 is fixing with respect to above-below direction (axle direction of ball screw axle) under the state that can rotate with respect to upper spring case 4 by block bearing 107 parts, therefore upper spring case 4 while descend, compression helical spring 6 during, by with the screw section 105 of ball nut 111 engagement of being fixed in lower support frame 110, make 104 rotations of ball screw axle on one side, Yi Bian dwindle the interval of upper spring case 4 and lower spring case 5.
When upper spring case 4 drops to the precalculated position, the decline of the upper spring case 4 that is undertaken by drive portion 1 is stopped, electromagnet energising to the inside of the stator 102 of magnetic clutch 101, by electromagnetic force armature 103 is fixed in stator 102, the rotation of restriction ball screw axle 104, thereby the compression reaction force that keeps helical spring 6 is length L 2 (＜L1) (Fig. 5) with the fixed interval of upper spring case 4 and lower spring case 5.
Under compressing helical spring 6 with the higher state of the elastic energy that keeps spring like this, make drive portion 1 work, be under the state of length L 2 in fixed interval with upper spring case 4 and lower spring case 5, make the aperture (Fig. 6) of spool 12 liftings with the control fluid valve.
(keeping mechanism) by the helical spring compression that magnetic clutch forms
In the present invention, keep interval by spring retaining mechanism 100 with upper spring case 4 under helical spring 6 compressive states and lower spring case 5.The spring reaction power of helical spring 6 becomes 8 tons powerful power sometimes under the situation of for example spool of bore 250mm.In the spring retaining mechanism 100 of the present invention that overcomes this spring reaction power that acts on the above-below direction, be made as 10mm in pitch with screw section 105, the efficient of screw thread is made as under 1 the situation, screw section 105 by ball screw axle 104 can keep 8 tons spring reaction power with the little torque of 12.7kgm, has to make the device simplification that keeps spring reaction power required, the advantage of compactness.
Under the situation of the control of unusual in drive portion 1 generation, as can't to carry out drive portion 1 fluid valve, need urgent block fluid valve.Under this situation, stop magnetic clutch 101 energisings to disconnect magnetic clutch.Thus, ball screw axle 104 can rotate.In normal operation, helical spring 6 remains on compressed state, therefore when urgent, no matter the position of spool 12 how, helical spring 6 extends rapidly, Yi Bian make 104 rotations of ball screw axle, Yi Bian enlarge upper spring case 4 and lower spring case 5 intervals, spool 11 is pressed on valve seat, thereby valve is promptly blocked (Fig. 3).
In the existing fluid valve driving mechanism shown in Figure 12, need operate drive portion with the power suitable with the spring reaction power sum that is far longer than this power with the fluid force that acts on spool, make helical spring flexible on one side, Yi Bian the opening and closing operations of the valve in turning round usually.But, by adopting formation of the present invention, can only use the power suitable to operate the opening and closing operations of drive portion, the permanent load of required drive portion when therefore having the common running that can alleviate valve, make the effect of drive portion compactness with the valve in turning round usually with the fluid force that acts on spool.
Though in the illustrative fluid valve driving mechanism of present embodiment illustration have a spring keeping unit (emergency unchaining unit) 100 of ball screw axle 104 and ball nut 111, but the invention is not restricted to this, also can realize same effect even it should be noted that the axle and the nut that have a so-called thread structure by roller thread spindle and roller screw or spindle with trapezoidal screw thread and trapezoidal nut etc.
Though in the illustrative fluid valve driving mechanism of present embodiment illustration have an emergency drive device of helical spring 6, but the invention is not restricted to this, also can realize same effect even it should be noted that the spring element that can store so-called elastic energy by disc spring, leaf spring, air cushion etc.
In addition, though in the present embodiment illustration spring keeping unit 100 have at upper spring case 4 structure that is fixed with magnetic clutch 101, is fixed with ball nut 111 in lower spring case 5 sides, but the invention is not restricted to this formation, even have magnetic clutch 101, have in the above-below direction of ball nut 111 and the spring keeping unit 100 that present embodiment is put upside down in lower spring case 5 sides, also can obtain same effect in upper spring case side.
(damping of shocks mechanism)
When urgent blocking-up, magnetic clutch 101 disconnects, and helical spring 6 extends fast, during spool 12 collision valve seats, might make the damage of spool 12 and valve seat, breakage.For this situation is prevented trouble before it happens, fluid valve driving mechanism of the present invention possesses damping of shocks mechanism 300 (Fig. 7).Damping of shocks mechanism 300 is oil damper (damper), has the damping of shocks tank body 305 that is fixed in main frame 3 or heat-insulating frame 8, at the inside of damping of shocks tank body 305 extending oil 301 (viscous fluid), connecting rod 10 connects with respect to damping of shocks tank body 305 slidably through O shape ring 304 (sealed members).Partial fixing at the connecting rod 10 that is positioned at damping of shocks tank body 305 has the plate 302 with throttle orifice 303.Make plate 302 in damping of shocks tank body 305 during lifting in the switching of valve, i.e. lifting by connecting rod 10, plate 302 bears the fluid resistances of oil 301 by throttle orifice 303.Fluid resistance and flow rate of fluid by throttle orifice square proportional, the quick rate of descent of the spool 12 when therefore relaxing valve and promptly block by the plate 302 that is fixed in connecting rod 10 can reduce the damage that brings to valve, damaged danger.
In addition, when drive portion 1 is unusual, disconnect by emergency cut-off electric power under the situation of magnetic clutch 101, spring reaction power by helical spring 6 make upper spring case 4 also fast rise move, but have damping of shocks body 9 at main frame 3, make the upper end of upper spring case 4 can not collide main frame 3 and device is produced damage.
(thermal insulation construction)
Be up under 280 ℃ the environment at the fuel temperature of gas turbine sometimes; early stage deterioration for the lubricated lipid that prevents from high temperature to be easy to deterioration; the temperature of check valve driving mechanism this means that rise; owing to can improve the maintainability of device and can keep the reliability of the reliable failure protection function when urgent, thereby be extremely important.Therefore, in the clack box 13 of the control valve for fluids that existing gas turbine fuel is used, often equipment is used to cool off the fan 511 (Figure 12) of spool.Therefore, exist the height of control valve device integral body to increase and the problem that maximizes.In the present invention, constitute have hollow structure heat-insulating frame 8 between main frame 3 and clack box 13, adopted to be difficult to the structure that conducts heat to main frame 3 sides from clack box 13.Further, at the linking department of main frame 3 and heat-insulating frame 8, heat-conducting section is long-pending to possess heat insulation linking department 7 to improve thermal resistance in order to reduce, and is difficult to from clack box 13 to main frame 3 sides heat transfers (Fig. 1, Fig. 2), by improving effect of heat insulation, can further improve the functional reliability of device.
(based on the high error protection mechanism of the reliability of linear guide)
For need be with the fluid valve emergency cut-off time and/or some the generation under the unusual situation of two magnetic clutchs, 101 devices because of a certain reason such as unusual of drive portion 1, can both carry out the blocking-up operation of reliable valve, fluid valve driving mechanism of the present invention possesses linear guide (directly moving guiding mechanism) mechanism 200.Fig. 8 (B-B section among Fig. 2) is the configuration of expression linear guide mechanism 200 and the sectional view of structure.Linear guide mechanism 200 comprises: be arranged at main frame 3, go up the guide rail 201 that extends at axial (above-below direction) of live axle 2; Be arranged at the last slide mass 202 of upper spring case 4; With the downslide kinetoplast 203 that is arranged at lower spring case 5.Slide mass engages with guide rail, usually, has steel ball 204 at the slot part of guide rail and slide mass, and upper spring case 4 and lower spring case 5 can be gone up smoothness at above-below direction (direction that this spool 12 is moved forward and backward) separately main frame 3 in carry out directly moving the guiding slidably.Though taken place under the unusual situation at the some of magnetic clutch 101, the spring reaction power that keeps helical spring 6 by one-sided spring retaining mechanism 100, but the guide rail 201 of linear guide mechanism 200 is fixed in firm main frame 3, so even spring reaction power is 8 tons sometimes, compare with the situation of the guide mechanism that uses the formed lining of columnar pillar etc., be out of shape also less, even and effect is only by the one-sided torque load that support produced, upper spring case 4 and lower spring case 5 can not realized the high urgent blocking-up of reliabilities by linear guide mechanism 200 with respect to the predetermined angle of main frame 3 inclinations yet.
Further, fluid valve driving mechanism of the present invention turns round under by the state of spring retaining mechanism 100 with the fixed interval of upper spring case 4 and lower spring case 5 under the state with helical spring 6 compressions usually.Therefore, even taken place under the unusual situation at one-sided spring retaining mechanism 100, also can be only come reliably helical spring 6 to be maintained compressive state, also have the effect that the blocking-up operation of the valve in case of necessity can be prevented trouble before it happens with another spring retaining mechanism 100 of proper functioning.
(embodiment 2)
In the fluid valve driving mechanism of the gas turbine of existing type shown in Figure 12, as record among the embodiment 1, when turning round usually, must carry out the opening and closing operations of valve with the power suitable with the compression reaction force sum of the spring that is far longer than this power with the fluid force that acts on spool, therefore, drive portion needs the bigger driving force of stable state when turning round usually.From the change of the hydraulic actuator of drive unit, has the big advantage in the application as follows and in the design: can avoid potential leakage of oil problem, can avoid setting numerous and diverse degree of hydraulic piping to electric actuator.But in order to obtain overcoming the required driving force of above-mentioned powerful like that helical spring compression reaction force by electric actuator, it is huge that electric actuator self can become, and particularly is unpractical when being applied to major valve therefore, is difficult to realize.But, in the present invention, when turning round usually, can only use the power suitable to carry out the opening and closing operations of valve with the fluid force that acts on spool, therefore the driving force of the aperture adjustment usefulness of the required valve of stable state diminishes, and has and can realize this special effect with electric actuator design driven portion.
Fig. 9 illustrate the embodiment of the invention 2 the fluid valve driving mechanism face the summary sectional view.In Figure 19, use identical mark to put down in writing for the parts identical, and omit detailed explanation with the parts of explanation in embodiment 1.
In the present embodiment, drive portion 1 uses the electric actuator 24 as rotating driving device, and the live axle 2 of drive portion 1 is not to move up and down but be rotated.In addition, main step bearing 21 and the nut 22 and with respect to main frame 3 on above-below direction can not move and can rotatably be fixed of live axle 2 by being fixed in main frame 3.Figure 10 illustrates the amplification view of the supporting portion of live axle 2.Live axle 2 has screw section 20, screws togather with the live axle lifting nut 23 that is fixed in upper spring case 4.
In the action of embodiment 1 fluid valve, when original state drives drive portion 1, live axle 2 descends so that upper spring case 4 descends, but in embodiment 2, and electric actuator 1 drives and makes live axle 2 rotations.By the rotation of live axle 2, the live axle lifting nut 23 that screws togather with the screw section 20 of live axle 2 is depressed, and upper spring case 4 is descended.Other elemental motion and embodiment 1 are same, can access invention effect similarly to Example 1.Further, in embodiment 2, by using electrical servo motor 24, can be controlled to be only driving current always especially by the angle of detection rotor at drive portion 1, the hi-Fix that can not have imbalance is so can control the aperture of fluid valve accurately.
(the accumulation load of screw section and bearing portion detects)
Further, use among the embodiment 2 of electrical servo motor 24, utilize the feature of electrical servo motor, can detect the mechanical accumulation load of screw section and bearing portion at drive portion 1.Summary pie graph with reference to accumulation load detection unit shown in Figure 11 comes to describe accumulating the load detection.
As present embodiment 2, use at drive portion 1 under the situation of electric actuator, it is very important for the reliability of holding means that the employed screw section 20 of the on-off action of fluid valve and main step bearing 21 are maintained the state that can work orderly.
The angle of swing of the rotor of electrical servo motor 24 is detected by the encoder (rotation detection member) 401 of interior dress.Electrical servo motor 24 has driver 402, driver 402 comes to electrical servo motor 24 supplying electric currents according to the position signal from encoder 401 feedbacks, so that produce the optimal rotating magnetic field of peak torque according to the angle of swing of the rotor of electrical servo motor in the stator generation.Upper last level controller 403 as driver 402 monitors on one side from the upper-lower position signal of the spool 12 of linear position sensor 406, Yi Bian control the upper-lower position of spool 12, is controlled to be suitable fluid flow.Driver 402 built-in motor drive current sensor 404, the driving current of monitoring motor.
Usually, the mechanical accumulation load that applies to screw section 20 and main step bearing 21 can be inferred by amassing of thrust and rotating speed.Because thrust and current of electric are proportional, so on being built in the accumulation load operational part 405 of level controller 403, according to the thrust and the rotating speed of being calculated by current of electric and encoder 401 respectively, computing and accumulation are as its mechanical accumulation load of amassing.Surpass under the situation of predetermined value in accumulation load operation values,,, also can know and the corresponding suitable maintenance time of the real work of device even have under the situation of fluctuation under each device busy state by showing alarm at alarm display unit 407.
Though illustrative fluid valve driving mechanism has two spring retaining mechanisies 100 among the embodiment, the invention is not restricted to this, it should be noted that by having three and also can play same effect with the upper spring retaining mechanism.Under this situation, preferred spring retaining mechanism more than three disposes symmetrically with respect to the central shaft of live axle 2.In addition, when increasing the quantity of spring retaining mechanism, reduce, therefore have the advantage of the compactness that can realize magnetic clutch, block bearing etc. for the confining force of the reaction force of the required helical spring 6 of spring retaining mechanism.
Further,, the invention is not restricted to this, it should be noted that by having three above linear guide mechanisms and also can realize same effect though illustrative fluid valve driving mechanism has two linear guide mechanisms 200 among the embodiment.Under this situation, preferred three above linear guide mechanisms dispose symmetrically with respect to the central shaft of live axle 2.
In addition, though illustrative fluid valve driving mechanism is that prerequisite is put down in writing with the action of carrying out that valve cuts out when the urgency among the embodiment, but the invention is not restricted to this, it should be noted that also purposes applicable to the action of carrying out when the urgency fluid valve is opened.Under the situation with the valve emergency opening when urgency, can pass through damping of shocks mechanism, spool is prevented trouble before it happens in damage, the breakage of opening the valve that extreme position caused collision of clack box etc., can play the effect same with embodiment.
In the explanation of the present invention in specification, come assigned direction with explanation the present invention by the statement that waits up and down, but it should be noted that this just describes for the ease of the record according to the appended accompanying drawing of specification, is not the direction that regulation is provided with device of the present invention.
The application requires the preference of the Japanese patent application 2008-281612 of application on October 31st, 2008, quotes the part that its content is used as the application.
Claims (11)
1. a fluid valve driving mechanism makes the spool of fluid valve move forward and backward with respect to valve seat,
Described fluid valve driving mechanism has drive unit and emergency drive device,
Described emergency drive device comprises spring unit and emergency unchaining unit,
Described spring unit comprise spring upper support portion, spring lower support portion and be configured in described spring upper support portion and described spring lower support portion between spring, described spring upper support portion is connected with described drive unit, described spring lower support portion is connected with spool,
Described emergency unchaining unit can be with the fixed interval between described spring upper support portion and the described spring lower support portion,
Described drive unit makes the lifting of described spring upper support portion,
From described spool and valve seat butt, described spring has been compressed the original state of predetermined length from free length between described spring upper support portion and described spring lower support portion, interval by dwindling described spring upper support portion and described spring lower support portion with described length of spring compressed after predetermined length, fix the interval of described spring upper support portion and described spring lower support portion by described emergency unchaining unit, by driving described drive unit, under the situation of the state that keeps having compressed described spring between described spring upper support portion and the described spring lower support portion, make described spool lifting, thereby the switching of control valve
When urgency, promptly drive, so that remove interval fixing of the described spring upper support portion that undertaken by described emergency unchaining unit and described spring lower support portion, described spring extends from compressive state, through described spring lower support portion described spool is descended, described spool is pressed on described valve seat, thus described fluid valve is closed.
2. fluid valve driving mechanism according to claim 1, wherein,
Described emergency unchaining unit comprises:
The emergency unchaining unit shaft, it runs through the axle upper support portion of being fixed in described spring upper support portion and is fixed in the axle lower support portion of described spring lower support portion and extends; With
Spring-loaded portion fixed interval device, it can be fixed the mutual relative position of described upper support portion, described axle lower support portion and described emergency unchaining unit shaft.
3. fluid valve driving mechanism according to claim 2, wherein,
Described emergency unchaining unit shaft is the axle with thread structure,
Side in described axle upper support portion and the described axle lower support portion is a nut, and has spool screwing togather of worm structure with described,
The opposing party in described axle upper support portion and the described axle lower support portion is a block bearing, under the state that described axle with thread structure is rotated, described axle with worm structure axially on fix with respect to the described the opposing party in described axle upper support portion and the described axle lower support portion
Can described spring-loaded portion fixed interval device be rotate control device, this can rotate control device to can carry out described have thread structure the axle and described nut between state in relative rotation and can not carry out described have thread structure the axle and described nut between state in relative rotation switch
By described axle and the relatively rotating of described nut with thread structure, can change the interval of described spring upper support portion and described spring lower support portion,
Under the state that described axle with thread structure can rotate, by acting on the pressing force between described spring upper support portion and the described spring lower support portion, that produce by described drive unit or the spring reaction power of described spring, described axle and described nut with thread structure relatively rotated, in the movable range of described spring upper support portion and described spring lower support portion, make the interval variation of described spring upper support portion and described spring lower support portion.
4. fluid valve driving mechanism according to claim 3, wherein,
Described axle with thread structure is the ball screw axle, and described nut is a ball nut.
5. according to claim 3 or 4 described fluid valve driving mechanisms, wherein,
Can the described control device that rotate be magnetic clutch.
6. according to each the described fluid valve driving mechanism in the claim 1 to 5, wherein,
Described emergency drive device also comprises linear guide device, this linear guide device channeling conduct so that described spring upper support portion and described spring lower support portion slide glibly moving forward and backward on the direction of described spool.
7. according to each the described fluid valve driving mechanism in the claim 1 to 6, wherein,
Described emergency drive device has relief means between described spring lower support portion and described spool,
Relax the lifting rapidly of described spool by the fluid resistance of the contained fluid of described relief means.
8. according to each the described fluid valve driving mechanism in the claim 1 to 7, wherein, have:
Main frame, it fixes described drive unit, and has described emergency drive device in inside;
Heat-insulating frame, it is arranged between the clack box and described main frame that comprises described spool, has hollow structure; And
Heat insulation joint, it is arranged between described heat-insulating frame and the described main frame.
9. according to each the described fluid valve driving mechanism in the claim 1 to 8, wherein,
Described drive unit is directly moving drive unit.
10. according to each the described fluid valve driving mechanism in the claim 1 to 8, wherein,
Described drive unit is a rotating driving device,
The joint of live axle that is rotated in the driving force by described rotating driving device and described spring upper support portion has the straight manual converting mechanism of rotation,
The rotation of the straight manual converting mechanism of described rotation by live axle makes the lifting of described spring upper support portion.
11. fluid valve driving mechanism according to claim 10, wherein,
Described rotating driving device is the electrical servo motor,
Described fluid valve driving mechanism also has accumulation load evaluating device,
Described accumulation load evaluating device has the rotation detecting of the rotation that detects described electrical servo motor and detects the drive current sensor of the electric current that drives described electrical servo motor, calculate by the long-pending of the detected motor thrust of described drive current sensor and this rotating speed and accumulate, under the accumulated value situation bigger, give the alarm than predetermined value.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP281612/2008 | 2008-10-31 | ||
| JP2008281612A JP4954964B2 (en) | 2008-10-31 | 2008-10-31 | Fluid valve drive mechanism |
| PCT/JP2009/068857 WO2010050609A1 (en) | 2008-10-31 | 2009-10-28 | Fluid valve drive mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102203475A true CN102203475A (en) | 2011-09-28 |
| CN102203475B CN102203475B (en) | 2013-01-16 |
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ID=42128968
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009801432654A Active CN102203475B (en) | 2008-10-31 | 2009-10-28 | Fluid valve drive mechanism |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP4954964B2 (en) |
| KR (1) | KR101204417B1 (en) |
| CN (1) | CN102203475B (en) |
| WO (1) | WO2010050609A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105264180A (en) * | 2013-08-30 | 2016-01-20 | 三菱重工压缩机有限公司 | Regulator valve drive mechanism and steam turbine |
| CN110030411A (en) * | 2019-05-07 | 2019-07-19 | 吴江市东吴机械有限责任公司 | With the anti-safety valve for breaking structure of position indicator |
| CN114008363A (en) * | 2019-11-25 | 2022-02-01 | 爱模系统有限公司 | Actuator and fluid control apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2466076A1 (en) * | 2010-12-20 | 2012-06-20 | Alstom Technology Ltd | High temperature steam valve |
| JP5863362B2 (en) | 2011-09-28 | 2016-02-16 | 三菱重工コンプレッサ株式会社 | Steam turbine |
| US9982558B2 (en) | 2013-03-22 | 2018-05-29 | Mitsubishi Heavy Industries Compressor Corporation | Steam turbine |
| CN103742711A (en) * | 2013-11-29 | 2014-04-23 | 成都欧浦特控制阀门有限公司 | Height-adjusting separating type support for control valve |
| JPWO2017104035A1 (en) * | 2015-12-17 | 2018-03-29 | 三菱重工コンプレッサ株式会社 | Main stop valve and steam turbine provided with the same |
| GB2564491A (en) * | 2017-07-14 | 2019-01-16 | Biofold Fluidpower Ltd | Failsafe valve actuator |
| CN111902664B (en) | 2018-09-11 | 2023-06-09 | 穆格日本有限公司 | Electric actuator for valve opening and closing and method for driving electric actuator for valve opening and closing |
| JP7360156B2 (en) | 2019-11-29 | 2023-10-12 | 株式会社フジキン | Valve devices, flow control devices and flow dividing devices |
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| CN85108777B (en) * | 1985-12-03 | 1988-11-30 | 丑毅 | Self-starting throttle valve |
| JPH0627905Y2 (en) * | 1988-07-25 | 1994-07-27 | 山武ハネウエル株式会社 | Connection structure between valve and actuator |
| DE19516054A1 (en) * | 1994-05-11 | 1995-11-16 | Kromschroeder Ag G | Controllable valve with stepping motor movable by electromagnet |
| DE4446605A1 (en) * | 1994-12-24 | 1996-06-27 | Abb Patent Gmbh | Valve for steam turbine |
| CN2367860Y (en) * | 1998-11-02 | 2000-03-08 | 金湖机械厂 | Hydraulic-driven safety valve |
| DE50108933D1 (en) * | 2000-10-20 | 2006-04-20 | Siemens Ag | Actuator for a valve, in particular a turbine valve |
| KR100619491B1 (en) * | 2003-02-25 | 2006-09-06 | 무그 게엠베하 | Displacement device |
| JP2005083504A (en) * | 2003-09-09 | 2005-03-31 | Kansai Electric Power Co Inc:The | Maintenance management system for motor valve system |
-
2008
- 2008-10-31 JP JP2008281612A patent/JP4954964B2/en active Active
-
2009
- 2009-10-28 WO PCT/JP2009/068857 patent/WO2010050609A1/en active Application Filing
- 2009-10-28 KR KR1020117011071A patent/KR101204417B1/en active IP Right Grant
- 2009-10-28 CN CN2009801432654A patent/CN102203475B/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105264180A (en) * | 2013-08-30 | 2016-01-20 | 三菱重工压缩机有限公司 | Regulator valve drive mechanism and steam turbine |
| US9938851B2 (en) | 2013-08-30 | 2018-04-10 | Mitsubishi Heavy Industries Compressor Corporation | Governing valve drive mechanism and steam turbine |
| CN110030411A (en) * | 2019-05-07 | 2019-07-19 | 吴江市东吴机械有限责任公司 | With the anti-safety valve for breaking structure of position indicator |
| CN114008363A (en) * | 2019-11-25 | 2022-02-01 | 爱模系统有限公司 | Actuator and fluid control apparatus |
| US11927274B2 (en) | 2019-11-25 | 2024-03-12 | M-System Co., Ltd. | Actuator and fluid control device |
Also Published As
| Publication number | Publication date |
|---|---|
| KR101204417B1 (en) | 2012-11-27 |
| KR20110090932A (en) | 2011-08-10 |
| JP4954964B2 (en) | 2012-06-20 |
| CN102203475B (en) | 2013-01-16 |
| JP2010106999A (en) | 2010-05-13 |
| WO2010050609A1 (en) | 2010-05-06 |
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