CN111043096A - Water turbine speed regulating system and built-in self-resetting double-end regulating main pressure distributing valve set thereof - Google Patents

Water turbine speed regulating system and built-in self-resetting double-end regulating main pressure distributing valve set thereof Download PDF

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Publication number
CN111043096A
CN111043096A CN202010008378.1A CN202010008378A CN111043096A CN 111043096 A CN111043096 A CN 111043096A CN 202010008378 A CN202010008378 A CN 202010008378A CN 111043096 A CN111043096 A CN 111043096A
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China
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valve
communicated
communication
state
centering
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CN202010008378.1A
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CN111043096B (en
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陈刚
刘伟
易博文
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HNAC Technology Co Ltd
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HNAC Technology Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03B—MACHINES OR ENGINES FOR LIQUIDS
    • F03B15/00—Controlling
    • F03B15/02—Controlling by varying liquid flow
    • F03B15/04—Controlling by varying liquid flow of turbines
    • F03B15/06—Regulating, i.e. acting automatically
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03B—MACHINES OR ENGINES FOR LIQUIDS
    • F03B3/00—Machines or engines of reaction type; Parts or details peculiar thereto
    • F03B3/16—Stators
    • F03B3/18—Stator blades; Guide conduits or vanes, e.g. adjustable
    • F03B3/183—Adjustable vanes, e.g. wicket gates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/04—Special measures taken in connection with the properties of the fluid
    • F15B21/041—Removal or measurement of solid or liquid contamination, e.g. filtering
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/20—Hydro energy

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Combustion & Propulsion (AREA)
  • Analytical Chemistry (AREA)
  • Multiple-Way Valves (AREA)

Abstract

The invention relates to a built-in self-resetting double-end adjusting main distributing valve set, which comprises a main distributing valve and a control mechanism. The main distribution valve has a starting state and a closing state, and comprises an oil inlet channel, an oil return channel, a control cavity and a constant pressure cavity, wherein the constant pressure cavity is communicated with the oil inlet channel. Control mechanism includes the mount pad and installs in the intercommunication subassembly of mount pad, and the mount pad is connected with the main valve of joining in marriage, and the intercommunication subassembly includes first intercommunication state and second intercommunication state. When the communication assembly is in a first communication state, the communication assembly is communicated with the oil inlet channel and the control cavity; when the communicating component is in a second communicating state, the communicating component communicates the oil return passage with the control cavity. The communicating component enables the main distribution valve to be switched between a starting state and a shutdown state, and further switching on and off of the water turbine is achieved. The built-in self-resetting double-end adjusting main distributing valve set has high integration degree, avoids forming a long external pipeline, reduces the risk of oil leakage and improves the reliability. The invention also relates to a speed regulating system of the water turbine.

Description

Water turbine speed regulating system and built-in self-resetting double-end regulating main pressure distributing valve set thereof
Technical Field
The invention relates to the technical field of water turbine speed regulation equipment, in particular to a water turbine speed regulation system and a built-in self-resetting double-end regulation main pressure distribution valve set thereof.
Background
The hydraulic turbine is used in the hydropower station for converting the kinetic energy of water flow into mechanical energy and driving the generator to operate so as to generate electricity. The water turbine speed regulating system controls the water flow of the water turbine by controlling the opening degree of the guide vane through hydraulic pressure, so that the rotating speed of the water turbine is controlled, and the generated energy is controlled, therefore, the water turbine speed regulating system plays a key role in safe and stable operation of a water turbine set and even an electric power system.
The main distributing valve group is a key device for ensuring the stable operation of the speed regulator and is used for receiving the electrical control signal in real time and converting the electrical control signal into a hydraulic signal to be output so as to control the opening of the servomotor, thereby realizing the adjustment of the water flow of the water turbine. However, the reliability of the existing main distributing valve group is low, so that the stable operation of a speed regulating system and even a power system is influenced.
Disclosure of Invention
On the basis, the water turbine speed regulating system with high reliability and the built-in self-resetting double-end regulating main pressure distributing valve set thereof are needed to be provided for solving the problem that the existing main pressure distributing valve set has low reliability and affects the stable operation of the speed regulating system and even the power system.
A built-in self-resetting double-end regulation main pressure distribution valve set comprises:
the main distribution valve is provided with a starting state and a stopping state, and comprises an oil inlet channel, an oil return channel, a first connecting channel, a second connecting channel, a control cavity and a constant pressure cavity, wherein the constant pressure cavity is communicated with the oil inlet channel; and
the control mechanism comprises a mounting seat and a communicating component arranged on the mounting seat, the mounting seat is connected with the main distribution valve, and the communicating component comprises a first communicating state and a second communicating state;
when the communication assembly is in the first communication state, the communication assembly is communicated with the oil inlet channel and the control cavity so as to enable the main distribution valve to enter the starting state;
when the communication assembly is in the second communication state, the communication assembly is communicated with the oil return passage and the control cavity so that the main distribution valve enters the shutdown state;
when the main distribution valve is in the starting state, the oil inlet channel is communicated with the first connecting channel, and the oil return channel is communicated with the second connecting channel; when the main distribution valve is in the shutdown state, the oil inlet channel is communicated with the second connecting channel, and the oil return channel is communicated with the first connecting channel.
The built-in self-resetting double-end adjusting main distributing valve set is arranged, the first connecting channel and the second connecting channel are communicated with the servomotor, the communicating component is connected with the main distributing valve through the mounting seat, and when the communicating component is in different states, the main distributing valve is switched between a starting state and a stopping state, so that the switching of the starting and the stopping of the water turbine is realized. Therefore, the whole built-in self-resetting double-end regulation main distributing valve set is integrally arranged, the integration level is high, a long external pipeline is prevented from being formed, the risk of oil leakage is reduced, the reliability of the built-in self-resetting double-end regulation main distributing valve set is improved, and the stable operation of a speed regulating system or even an electric power system is further ensured.
Drawings
Fig. 1 is a schematic structural diagram of a built-in self-resetting double-end regulation main pressure distribution valve set according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the built-in self-resetting double-ended regulating main distributing valve set shown in FIG. 1;
FIG. 3 is a top view of the internal self-resetting double-ended regulating main distributing valve group shown in FIG. 1;
FIG. 4 is a cross-sectional view at A-A of the built-in self-resetting double-ended modulating master distribution valve stack of FIG. 3;
fig. 5 is a cross-sectional view at B-B of the built-in self-resetting double-ended regulating main distributing valve group shown in fig. 3.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.
As shown in fig. 1 and fig. 2, a built-in self-resetting double-ended regulating main distribution valve group 100 according to an embodiment of the present invention includes a main distribution valve 10 and a control mechanism 30.
The main distribution valve 10 has an on state and an off state, the main distribution valve 10 includes an oil inlet passage 12, an oil return passage 14, a first connecting passage 16, a second connecting passage 18, a control chamber 112 (shown in fig. 4), and a constant pressure chamber 114 (shown in fig. 4), and the constant pressure chamber 114 is communicated with the oil inlet passage 12.
The control mechanism comprises a mounting seat 22 and a communication component 24 arranged on the mounting seat 22, wherein the mounting seat 22 is connected with the main distribution valve 10, and the communication component 24 comprises a first communication state and a second communication state.
When the communication assembly 24 is in the first communication state, the communication assembly 24 communicates with the oil inlet passage 12 and the control chamber 112 to enable the main distribution valve 10 to enter the on state.
When the communication assembly 24 is in the second communication state, the communication assembly 24 communicates with the oil return passage 14 and the control chamber 112 to enable the main distribution valve 10 to enter the shutdown state.
When the main distribution valve 10 is in a starting state, the oil inlet passage 12 is communicated with the first connecting passage 16, and the oil return passage 14 is communicated with the second connecting passage 18; when the main distribution valve 10 is in the shutdown state, the oil inlet passage 12 communicates with the second connecting passage 18, and the oil return passage 14 communicates with the first connecting passage 16.
It should be noted with reference to fig. 2 that the first connecting passage 16 and the second connecting passage 18 are respectively connected to the rodless cavity and the rod cavity of the hydraulic turbine 200, when the hydraulic oil in the oil inlet passage 12 enters the control cavity 112, the main distribution valve 10 enters the power-on state, and when the main distribution valve 10 is in the power-on state, the hydraulic turbine is powered on by moving the hydraulic turbine 200 to the left; when the hydraulic oil in the control chamber 112 enters the oil return passage 14, the main distribution valve 10 enters a shutdown state, and when the main distribution valve 10 is in the shutdown state, the servomotor 200 moves towards the right, and the water turbine is shut down.
Of course, the first connecting channel 16 and the second connecting channel 18 may also be a rod cavity and a rod-less cavity respectively connected to the servomotor, and when the main distribution valve 10 is in the power-on state, the servomotor 200 moves to the right, and the water turbine is powered off, and when the main distribution valve 10 is in the power-off state, the servomotor 200 moves to the left, and the water turbine is powered on. Preferably, the starting state of the main distribution valve 10 corresponds to the starting of the water turbine, and the starting state and the shutdown state of the main distribution valve 10 correspond to the starting and the shutdown of the water turbine in the following embodiments, respectively.
By arranging the built-in self-resetting double-end regulation main distributing valve set, the first connecting channel 16 and the second connecting channel 18 are connected to the servomotor 200, the communicating component 24 is connected with the main distributing valve 10 through the mounting seat 22, and when the communicating component 24 is in different states, the main distributing valve 10 is switched between a starting state and a stopping state, so that the switching of the water turbine on and off is realized. Therefore, the whole built-in self-resetting double-end regulation main distributing valve set is integrally arranged, the integration level is high, a long external pipeline is prevented from being formed, the risk of oil leakage is reduced, the reliability of the built-in self-resetting double-end regulation main distributing valve set is improved, and the stable operation of a speed regulating system or even an electric power system is further ensured.
Referring to fig. 3-5, further, the main distributing valve 10 includes a valve body 11 and a valve core 13, the mounting seat 22 is connected to one end of the valve body 11, the valve body 11 has a first connecting passage 16 and a second connecting passage 18 both communicating with the valve cavity, and the oil inlet passage 12 and the oil return passage 14 communicate with the valve cavity.
In practical application, the valve core 13 is movably connected to the valve body 11, the valve core 13 penetrates through the valve cavity, one end of the valve core 13 penetrates out from one end of the valve body 11 connected with the mounting seat 22, the position between the end of the valve core 13 penetrating out of the valve body 11 and the valve body 11 is sealed, and the moving path of the valve core 13 comprises a first communication section and a second communication section.
When the valve core 13 is in the first communication section, the oil inlet passage 12 is communicated with the first connecting passage 16, and the oil return passage 14 is communicated with the second connecting passage 18.
When the valve core 13 is in the second communication section, the oil inlet passage 12 is communicated with the second connecting passage 18, and the oil return passage 14 is communicated with the first connecting passage 16.
That is, the first connecting passage 16 and the second connecting passage 18 may be respectively communicated with the rodless chamber and the rod chamber of the relay 200, and then the communication between the first connecting passage 16 and the second connecting passage 18 and the oil inlet passage 12 and the oil return passage 14 is controlled by the valve core 13, so that the main distribution valve 10 is in the power-on state or the power-off state.
Specifically, when the first connecting passage 16 is communicated with the oil inlet passage 12, the second connecting passage 18 is communicated with the oil return passage 14, the main distribution valve 10 is in a starting state, and the water turbine is started; when the second connecting passage 18 is communicated with the oil inlet passage 12 and the first connecting passage 16 is communicated with the oil return passage 14, the main distribution valve 10 is in a shutdown state, and the water turbine is shut down.
The first connecting channel 16 and the second connecting channel 18 are respectively communicated with a rod cavity and a rodless cavity of the servomotor 200, when the valve core 13 is positioned in the first communicating area, hydraulic oil in the oil inlet channel 12 enters the rod cavity, hydraulic oil in the rodless cavity flows back to the oil return channel 14, at this time, the servomotor 200 moves to the right, and the water turbine is shut down; when the valve core 13 is in the second communication section, the hydraulic oil in the oil inlet channel 12 enters the rodless cavity, and the hydraulic oil in the rod cavity flows back to the oil return channel 14, at this time, the servomotor 200 moves to the left, and the water turbine is started.
In some embodiments, the main distribution valve 10 further has a static state, that is, the communication assembly 24 is in the first communication state or the second communication state, such that the main distribution valve 10 is switched among the on state, the static state and the off state.
Further, the movement path of the spool 13 includes a first communication section, a disconnection section, and a second communication section, and the disconnection section is located between the first communication section and the second communication section. When the valve core 13 is in the disconnection area, the oil inlet passage 12, the oil return passage 14, the first connecting passage 16 and the second connecting passage 18 are not communicated with each other, and the main distribution valve 10 is in a static state.
When the valve core 13 is in the disconnection region, the rod chamber and the rodless chamber are disconnected from the oil inlet passage 12 or the oil return passage 14, and the servomotor 200 remains stationary. It should be explained that, for the servomotor 200, besides the servomotor 200 is required to move left and right to start and shut down the water turbine, the servomotor 200 is required to be kept at the current position in some cases, so as to stabilize the flow rate of the water in the water turbine. When the main distributing valve 10 is in a static state, the servomotor 200 is kept at the current position.
In some embodiments, the valve element 13 includes a rod 132, and a first isolation portion 134 and a second isolation portion 136 disposed on the rod 132, the first isolation portion 134 and the second isolation portion 136 are disposed at intervals along a longitudinal direction of the rod 132, and are movable with the rod 132 along the longitudinal direction of the rod 132 in the valve cavity, the first isolation portion 134 and the second isolation portion 136 are both sealed with an inner wall of the valve cavity during movement to divide the valve cavity into a control cavity 112, an adjustment cavity and a constant pressure cavity 114, the adjustment cavity is communicated with the oil inlet passage 12, the oil return passage 14, the first connecting passage 16 and the second connecting passage 18, and a cross-sectional flow area of the control cavity 112 is larger than a cross-sectional flow area of the constant pressure cavity 114.
The first and second isolation portions 134, 136 are sealed with the inner wall of the valve chamber to form the control chamber 112, the adjustment chamber, and the constant pressure chamber 114, and the cross-sectional flow area of the control chamber 112 is larger than that of the constant pressure chamber 114, so the cross-sectional area corresponding to the first isolation portion 134 is larger than that of the second isolation portion 136.
It should be noted that, the main distribution valve 10 is vertically installed, when the main distribution valve 10 is vertically installed, the constant pressure chamber 114, the adjusting chamber and the control chamber 112 are sequentially arranged from bottom to top, when the control chamber 112 is communicated with the oil inlet channel 12 for oil inlet, the constant pressure chamber 114 is also communicated with the oil inlet channel 12, for hydraulic oil, the pressure intensity of the hydraulic oil in the lower constant pressure chamber 114 is slightly greater than the pressure intensity in the control chamber 112, and the valve element 13 is movably arranged, so that the gravity of the valve element 13 and a part of the hydraulic oil in the constant pressure chamber 114 counteract the pressure of the valve element 13.
Of course, even if not vertically installed, the pressure is the same, and in the case where both the control chamber 112 and the constant pressure chamber 114 communicate with the oil intake passage 12, the pressure received by the first isolation portion 134 is greater than that of the second isolation portion 136.
However, the contact area between the hydraulic oil and the first isolation portion 134 is larger than the contact area between the hydraulic oil and the second isolation portion 136, and it can be determined that, under the condition that the control chamber 112 and the constant pressure chamber 114 are both communicated with the oil inlet channel 12, the pressure applied to the first isolation portion 134 plus the gravity of the valve element 13 is larger than the pressure applied to the second isolation portion 136, the valve element 13 moves along the arrangement direction of the control chamber 112, the adjustment chamber and the constant pressure chamber 114, and the valve element 13 can sequentially pass through the first communication interval, the disconnection interval and the second communication interval when moving along the arrangement direction.
Similarly, when the control chamber 112 is communicated with the oil return passage 14, that is, the hydraulic oil in the control chamber 112 flows out, the pressure in the hydraulic oil in the control chamber 112 decreases, the pressure in the constant pressure chamber 114 does not change, the pressure applied to the second isolation portion 136 does not change, the pressure applied to the first isolation portion 134 decreases, and the pressure applied to the first isolation portion 134 and the gravity of the valve element 13 are smaller than the pressure applied to the second isolation portion 136, so that the valve element 13 moves along the arrangement direction of the constant pressure chamber 114, the adjustment chamber and the control chamber 112, and the valve element 13 can sequentially pass through the second communication interval, the disconnection interval and the first communication interval when moving along the arrangement direction.
In summary, it can be understood that when the communication assembly 24 is in different states, the control chamber 112 is communicated with the oil inlet passage 12 or the oil return passage 14, respectively, so as to move the valve element 13, and thus, the main distributing valve 10 is switched between the power-on state, the static state and the power-off state.
In some embodiments, a limiting hole extending along the longitudinal direction of the valve core 13 is formed in a surface of the mounting seat 22 facing the main distributing valve 10, the control mechanism further includes a limiting member 26, one end of the limiting member 26 is movably limited in the limiting hole along the longitudinal direction of the valve core 13, the other end of the limiting member 26 extends out of the limiting hole, and the limiting member 26 is sealed with an inner wall of the limiting hole when moving in the limiting hole at one end limited in the limiting hole to form a centering cavity 222.
The limiting member 26 has a centering position in the process of moving along the longitudinal direction of the valve element 13, and when the limiting member 26 is located at the centering position, one end of the limiting member 26 extending out of the limiting hole can abut against one end of the valve element 13 extending out of the valve body 11, so as to limit the valve element 13 in the disconnection interval and the second connection interval.
That is, when the stopper 26 is located at the centering position, the movement path of the spool 13 is limited to the disconnection section and the second communication section. The limiting member 26 is limited in the limiting hole, the limiting member 26 and the limiting hole are enclosed to form a sealed centering cavity 222, when the limiting member 26 is located at the centering position, the volume of the centering cavity 222 is maximized, at this time, the distance between the limiting member 26 and the bottom wall of the limiting hole is maximized, and the limiting member 26 is limited and cannot move in the direction away from the bottom wall of the limiting hole.
When the main distribution valve 10 needs to be switched from the shutdown state to the static state quickly and the valve core 13 needs to be moved from the second communication interval to the disconnection interval, the limiting member 26 can be kept at the centering position, then the communication assembly 24 is in the first communication state, the main distribution valve 10 is switched from the shutdown state to the startup state, and the switching process passes through the static state, but due to the limitation of the limiting member 26, the valve core 13 stops moving when the main distribution valve 10 is switched to the static state, so that the main distribution valve 10 is kept in the static state.
Further, the cross-sectional flow area of the restriction aperture is greater than the cross-sectional flow area of the constant pressure chamber 114, and the control mechanism further includes a centering assembly 28, the centering assembly 28 including a floating communication state and a centering communication state.
When centering assembly 28 is in floating communication, centering cavity 222 is in communication with oil return passage 14 through centering assembly 28; when the centering assembly 28 is in the centering communication state, the centering cavity 222 communicates with the oil inlet passage 12 through the centering assembly 28.
Therefore, it can be found that, in the same way, under the condition that the limiting member 26 abuts against one end of the valve element 13, the centering cavity 222 is communicated with the oil inlet channel 12, and the pressure applied to the limiting member 26 plus the gravity of the valve element 13 is greater than the pressure applied to the second isolation portion 136, so that the limiting member 26 drives the valve element 13 to move along the arrangement direction of the control cavity 112, the adjustment cavity and the constant pressure cavity 114, that is, to move downward, and the limiting member 26 cannot move downward continuously when reaching the centering position, thereby moving the valve element 13 into the off interval.
When the main distribution valve 10 needs to be switched from the power-on state to the static state quickly, the communication assembly 24 may be in the first communication state, the centering assembly 28 may be in the centering communication state, the centering cavity 222 is communicated with the oil inlet passage 12, the limiting member 26 is forced to move and drives the valve element 13 to move, until the limiting member 26 moves to the centering position, at which time the valve element 13 is located in the off interval, and the main distribution valve 10 is in the static state.
In some embodiments, the limiting member 26 includes a limiting portion, a limiting protrusion is disposed at the hole opening of the limiting hole, the limiting portion matches with the hole diameter of the limiting hole, the limiting portion is limited in the limiting hole by the limiting protrusion, the limiting portion is movable in the limiting hole, and the limiting portion is sealed with the inner wall of the limiting hole.
Further, the limiting part 26 further includes a matching part having one end fixedly connected to the limiting part, the end of the matching part away from the limiting part can pass through the limiting hole, the end of the matching part away from the limiting part has a matching hole, and the end of the valve element 13 extending out of the valve body 11 can extend into the matching hole.
In some embodiments, centering assembly 28 includes a shuttle valve 282 and a pilot operated directional valve 284 in communication with each other, shuttle valve 282 also being in communication with communication assembly 24, pilot operated directional valve 284 being in communication with centering chamber 222, oil return passage 14, and oil inlet passage 12, respectively.
When centering assembly 28 is in floating communication, pilot operated directional valve 284 is in communication with oil inlet passage 12 through shuttle valve 282 and communication assembly 24, and centering cavity 222 is in communication with oil return passage 14 through pilot operated directional valve 284.
When centering assembly 28 is in the centering communication state, pilot operated directional valve 284 communicates with oil return passage 14 through shuttle valve 282, and centering chamber 222 communicates with oil inlet passage 12 through pilot operated directional valve 284.
Referring to fig. 2 and 4, in some embodiments, the communication assembly 24 includes a first proportional control valve 242, a first switching valve 244 and a second switching valve 246 disposed on the mounting base 22. The first proportional control valve 242 communicates with the oil inlet passage 12, the oil return passage 14, and the first switching valve 244, the first switching valve 244 communicates with the first proportional control valve 242, the oil return passage 14, and the second switching valve 246 communicates with the oil return passage 14 and the control chamber 112.
When the communication assembly 24 is in the first communication state, the oil inlet passage 12 is communicated with the control chamber 112 through the first proportional control valve 242, the first switching valve 244 and the second switching valve 246 in sequence.
When the communication assembly 24 is in the second communication state, the control chamber 112 communicates with the oil return passage 14 through the second switching valve 246, the first switching valve 244, and the first proportional control valve 242 in this order.
In some embodiments, the communication assembly 24 further includes a third switching valve 247 and a fourth switching valve 248 disposed on the mounting base 22. The second switching valve 246 is also communicated with the centering group 28, the third switching valve 247 is communicated with the first proportional control valve 242 and the oil return passage 14, respectively, and the fourth switching valve 248 is communicated with the centering group 28 and the oil return passage 14, respectively.
When the communication assembly 24 is in the first communication state, the centering assembly 28 is in communication with the oil feed passage 12 through the second switching valve 246, the first switching valve 244, and the first proportional control valve 242 in that order, such that the centering assembly 28 is in floating communication.
When the communication assembly 24 is in the second communication state, the centering assembly 28 is communicated with the oil inlet passage 12 through the fourth switching valve 248, the third switching valve 247, and the first proportional control valve 242 in this order, so that the centering assembly 28 is in the floating communication state.
As described with reference to fig. 2, when the communication assembly 24 is in the first communication state, the first proportional control valve 242 is in the crossing position, the first switching valve 244 and the second switching valve 246 are in the parallel position, at this time, the hydraulic oil entering from the oil inlet passage 12 passes through the second switching valve 246 and then enters the control chamber 112 and the shuttle valve 282, the hydraulic oil entering the shuttle valve 282 enters the hydraulic control directional valve 284, so that the hydraulic control directional valve 284 is in the crossing position, and thus the centering chamber 222 is communicated with the oil return passage 14, and the limiting member 26 can move left and right without limiting the valve element 13.
When the communication assembly 24 is in the second communication state, the first proportional control valve 242 is in the parallel position, the first switching valve 244 and the second switching valve 246 are in the parallel position, the control chamber 112 is communicated with the oil return passage 14, the third switching valve 247 and the fourth switching valve 248 are in the parallel position, the oil inlet passage 12 does not flow to the control chamber 112, but flows to the shuttle valve 282 through the first proportional control valve 242, the third switching valve 247 and the fourth switching valve 248, and also flows into the pilot-operated directional valve 284 through the shuttle valve 282, so that the pilot-operated directional valve 284 is in the cross position, and the centering chamber 222 is communicated with the oil return passage 14.
It should be explained that the shuttle valve 282 is respectively communicated with the second switching valve 246 and the fourth switching valve 248, the shuttle valve 282 is used for delivering the hydraulic oil input from the oil inlet passage 12 to the pilot-operated directional valve 284, and when the pressure of the hydraulic oil between the second switching valve 246 and the shuttle valve 282 is greater than the pressure between the fourth switching valve 248 and the shuttle valve 282, the shuttle valve 282 receives the hydraulic oil from the second switching valve 246; otherwise, the hydraulic oil is received from the fourth switching valve 248.
In some embodiments, the communication assembly 24 further includes a second proportional control valve 243, the second proportional control valve 243 being in communication with the oil inlet passage 12, the oil return passage 14, the first switching valve 244, and the third switching valve 247, respectively. The communication assembly 24 further includes a third communication state and a fourth communication state.
When the communication assembly 24 is in the third communication state, the oil inlet passage 12 communicates with the control chamber 112 sequentially through the second proportional control valve 243, the first switching valve 244, and the second switching valve 246.
When the communication assembly 24 is in the fourth communication state, the control chamber 112 is communicated with the oil return passage 14 through the second switching valve 246, the first switching valve 244, and the second proportional control valve 243 in this order.
It should be noted that the second proportional control valve 243 is of a redundant design, i.e., is used in the event of a failure of the first proportional control valve 242, i.e., the first proportional control valve 242 fails when the communication assembly 24 is in the third communication state or the fourth communication state. When the first proportional control valve 242 is operating normally, the second proportional control valve 243 is always in the same state as the first proportional control valve 242, that is, when the first proportional control valve 242 is in the crossing position, the second proportional control valve 243 is also in the crossing position, and the function of the second proportional valve is only to communicate with the oil return passage 14.
When the communication assembly 24 is in the third communication state, the second proportional control valve 243, the first switching valve 244, and the third switching valve 247 are all in the crossing position, and the second switching valve 246 and the fourth switching valve 248 are all in the parallel position, so that the hydraulic oil of the oil feed passage 12 flows into the shuttle valve 282 and the control chamber 112.
When the communication assembly 24 is in the fourth communication state, the second proportional control valve 243 is changed from the cross position to the parallel position, and the positions of the other valves are the same as those in the third communication state, so that the hydraulic oil in the oil inlet passage 12 flows into the shuttle valve 282 and the hydraulic oil in the control chamber 112 flows into the oil return passage 14.
In some embodiments, the communication assembly 24 further includes a third proportional control valve 241, the third proportional control valve 241 being in communication with the oil feed passage 12, the oil return passage 14, the second switching valve 246, and the fourth switching valve 248, respectively. The communication assembly 24 further includes a fifth communication state and a sixth communication state.
When the communication assembly 24 is in the fifth communication state, the oil inlet passage 12 is communicated with the control chamber 112 through the third proportional control valve 241 and the second switching valve 246 in sequence.
When the communication member 24 is in the sixth communication state, the control chamber 112 is communicated with the oil return passage 14 through the second switching valve 246 and the third proportional control valve 241 in sequence.
It should be noted that the third proportional control valve 241 is a manually operated valve, and when the first proportional control valve 242 or the second proportional control valve 243 is not failed, the third proportional control valve 241 is also operable with the first proportional control valve 242 or the second proportional control valve 243 to ensure that the third proportional control valve 241 and the first proportional control valve 242 or the second proportional control valve 243 are in a cross position or a parallel position at the same time, and at this time, the third proportional control valve 241 is used to communicate with the oil return passage 14. When both the first proportional control valve 242 and the second proportional control valve 243 fail, the third proportional control valve 241 needs to be manually adjusted, and when the communication unit 24 is in the fifth communication state or the sixth communication state, both the first proportional control valve 242 and the second proportional control valve 243 fail.
When the communication assembly 24 is in the fifth communication state, the third proportional control valve 241, the second switching valve 246 and the fourth switching valve 248 are all in the crossing position, so that the hydraulic oil in the oil inlet passage 12 enters the control chamber 112 and the shuttle valve 282.
When the communication assembly 24 is in the sixth communication state, the third proportional valve is shifted from the cross position to the parallel position, and the second switching valve 246 and the fourth switching valve 248 are positioned in the same manner as in the fifth communication state, so that the hydraulic oil in the oil inlet passage 12 flows into the shuttle valve 282 and the hydraulic oil in the control chamber 112 flows into the oil return passage 14.
It should be noted that fig. 2 is described in conjunction with the above-described embodiment, the arrows in the various valves in fig. 2 are only for showing the internal oil passages, and the corresponding oil passages are only for communicating with the externally-connected oil passages, and the flow direction of the hydraulic oil in the valves is not limited, and may be regarded as a communicating state.
In addition, the redundancy design of three proportional control can ensure the stable operation of the whole communication assembly 24, and can switch between automatic operation and manual operation, thereby further improving the reliability of the built-in self-resetting double-end regulation main distributing valve group.
In some embodiments, the control mechanism further comprises a close-stop valve 29, the close-stop valve 29 is mounted on the mounting seat 22, the close-stop valve 29 is respectively communicated with the oil inlet passage 12, the oil return passage 14 and the hydraulic control directional valve 284, and the close-stop valve 29 comprises a close-stop state and an operating state.
When the tight stop valve 29 is in the tight stop state, the centering assembly 28 is in the floating communication state, the oil inlet channel 12 is communicated with the oil return channel 14 through the tight stop valve 29, and the centering cavity 222 is communicated with the oil return channel 14 through the hydraulic control reversing valve 284 and the tight stop valve 29 in sequence.
As explained in connection with fig. 2, when the close-stop valve 29 is in the close-stop state and the close-stop valve 29 is in the cross position, the oil inlet passage 12 is communicated with the oil return passage 14 directly through the close-stop valve 29 and cannot enter the control chamber 112 through the communication member 24, and no matter what state the communication member 24 is, the hydraulic oil in the control chamber 112 flows back to the oil return passage 14 through the communication member 24 or the connection member and the close-stop valve 29. The fixed middle cavity 222 is communicated with the oil return channel 14 through the hydraulic control reversing valve 284 and the emergency stop valve 29, the limiting piece 26 can move left and right, the valve core 13 cannot be limited, and therefore the main distribution valve 10 can rapidly enter a shutdown state.
In some embodiments, the built-in self-centering double-end-regulation main pressure distribution valve set further comprises a filter 30, the filter 30 is mounted on the mounting seat 22, and the filter 30 is connected between the oil inlet channel 12 and the control mechanism and is used for filtering hydraulic oil conveyed to the control mechanism from the oil inlet channel 12. It will be appreciated that the control mechanism has a high quality requirement for the hydraulic oil and therefore requires filtering of the incoming hydraulic oil. Specifically, the filter 30 is a double-barrel filter.
In some embodiments, the built-in self-resetting double-ended regulating main pressure distributing valve set further comprises a connecting piece 40, wherein the connecting piece 40 is connected between the mounting seat 22 and the valve body 11 and is used for fixing the mounting seat 22 and the valve body 11 to each other. In practical application, the connecting member 40 is a bell jar, and one end of the valve element 13 penetrating through the valve body 11 is arranged through the bell jar.
In some embodiments, the built-in self-resetting double-end-regulating main pressure distribution valve group further comprises a first connecting pipe 50 and a second connecting pipe 60, opposite ends of the first connecting pipe 50 and the second connecting pipe 60 are respectively connected to the valve body 11 and the mounting seat 22, the first connecting pipe 50 is used for communicating the oil inlet passage 12 and the control mechanism, and the second connecting pipe 60 is used for communicating the control mechanism and the oil return passage 14.
Furthermore, a first communicating pipeline 111, a second communicating pipeline 113 and a third communicating pipeline 115 are arranged in the valve body 11, the first communicating pipeline 111 is used for communicating the oil inlet pipeline and the constant pressure cavity 114, one end of the second communicating pipeline 113 is communicated with the oil inlet pipeline, the other end of the second communicating pipeline 113 penetrates through one end of the valve body 11 facing the mounting seat 22, and the first connecting pipe 50 is communicated with one end of the second communicating pipeline 113 penetrating through the valve body 11; one end of the third communicating pipe 115 is communicated with the oil return pipe, the other end of the third communicating pipe runs through one end of the valve body 11 facing the mounting seat 22, and the second connecting pipe 60 is communicated with one end of the third communicating pipe 115 running through the valve body 11.
It should be noted that the valve is installed on the mounting seat 22, and a communication pipeline is correspondingly opened in the mounting seat 22, and the valve on the mounting seat 22 can be used to communicate with the first connecting pipe 50 and the second connecting pipe 60.
Therefore, corresponding communicating pipelines are arranged on the valve body 11, the control mechanism is communicated with the oil inlet channel 12 through the first connecting pipe 50 and the second connecting pipe 60, various valves are arranged on the mounting seat 22, the corresponding communicating pipelines are arranged in the mounting seat 22 to realize the communication among various valves on the mounting seat 22, between the valves and the centering cavity 222 and between the valves and the two connecting pipes, the whole built-in self-centering double-end adjusting main pressure distributing valve set is effectively integrated together, the structure is compact, the occupied space is small, the lifting and the dismounting are convenient, meanwhile, the oil circuit integration level is high, the oil leakage risk is low, and the reliability of the built-in self-centering double-end adjusting main pressure distributing valve set is improved.
Furthermore, the main distributing valve 10 comprises two oil return channels 14A (14B), wherein the oil return channel 14A is used for controlling the mechanism oil return, and the oil return channel 14B is used for the main distributing valve 10 oil return.
In some embodiments, the built-in self-resetting double-end-regulation main distributing valve set further comprises a third connecting pipe 70, opposite ends of the third connecting pipe 70 are respectively connected to the valve body 11 and the mounting seat 22, and the third connecting pipe 70 is used for communicating the control chamber 112 with the control mechanism. The communication method is the same as that of the first connection pipe 50 and the second connection pipe 60, and a person skilled in the art can establish a communication channel, which is not described herein.
In some embodiments, the built-in self-resetting double-end regulation main distribution valve set further comprises a regulating mechanism for regulating the opening degree of the main distribution valve 10 in the on state or the off state.
Further, the adjusting mechanism includes a first adjusting component 82 and a second adjusting component 84, the first adjusting component 82 is connected to the mounting seat 22 and used for limiting the movement of the valve core 13 towards the mounting seat 22, and the second adjusting component 84 is connected to the valve body 11 and used for limiting the movement of the valve body 11 away from the mounting seat 22.
It can be understood that, for the main distribution valve 10, the communication between the oil passages is connected or disconnected through the movement of the valve core 13, and the opening degree of the communication between the oil passages can be adjusted during the movement of the valve core 13, which is a conventional technology for the main distribution valve 10 and is not described in detail herein.
In some embodiments, one end of the rod 132 extending out of the valve body 11 has a step structure, the first adjusting component 82 includes a connecting rod 822 and a limiting rod 824, the connecting rod 822 is connected to the mounting seat 22, one end of the limiting rod 824 is connected to the connecting rod 822, the other end of the limiting rod 824 has a groove matched with the portion of the step structure with the smaller radial dimension, the groove is sleeved on the portion of the step structure with the smaller radial dimension, and the portion of the step structure with the larger radial dimension can abut against the limiting rod 824 when moving, so as to achieve the limiting and adjust the opening degree of the main distribution valve 10 in the startup state.
In some embodiments, the second adjusting member 84 is screwed and sealed to an end of the valve body 11 away from the mounting seat 22 and extends into the valve cavity, and by adjusting a distance between an end of the second adjusting member 84 extending into the valve cavity and the valve core 13, a distance that the valve core 13 moves downward can be adjusted, so that an opening degree of the main distribution valve 10 in a shutdown state is adjusted.
Based on the built-in self-resetting double-end regulation main pressure distribution valve set, the invention also relates to a water turbine speed regulating system which comprises the built-in self-resetting double-end regulation main pressure distribution valve set.
Compared with the prior art, the water turbine speed regulator and the built-in self-resetting double-end regulation main distributing valve set thereof provided by the invention have the advantages that:
1) the integration level is high, the structure is compact, the occupied space is small, and the hoisting and the dismounting are convenient;
2) the oil circuit integration level is high, the oil leakage risk is lower, and the reliability of the built-in self-resetting double-end adjusting main distributing valve set is improved.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. A built-in self-resetting double-end regulation main pressure distribution valve set is characterized by comprising:
the main distribution valve is provided with a starting state and a stopping state, and comprises an oil inlet channel, an oil return channel, a first connecting channel, a second connecting channel, a control cavity and a constant pressure cavity, wherein the constant pressure cavity is communicated with the oil inlet channel; and
the control mechanism comprises a mounting seat and a communicating component arranged on the mounting seat, the mounting seat is connected with the main distribution valve, and the communicating component comprises a first communicating state and a second communicating state;
when the communication assembly is in the first communication state, the communication assembly is communicated with the oil inlet channel and the control cavity so as to enable the main distribution valve to enter the starting state;
when the communication assembly is in the second communication state, the communication assembly is communicated with the oil return passage and the control cavity so that the main distribution valve enters the shutdown state;
when the main distribution valve is in the starting state, the oil inlet channel is communicated with the first connecting channel, and the oil return channel is communicated with the second connecting channel; when the main distribution valve is in the shutdown state, the oil inlet channel is communicated with the second connecting channel, and the oil return channel is communicated with the first connecting channel.
2. The built-in self-centering double-end regulation main pressure distribution valve group according to claim 1, wherein the main pressure distribution valve further has a static state, the main pressure distribution valve comprises a valve body and a valve core, the mounting seat is connected to one end of the valve body, the valve body is provided with a valve cavity, the first connecting passage and the second connecting passage are both communicated with the valve cavity, and the oil inlet passage and the oil return passage are communicated with the valve cavity;
the valve core is movably connected with the valve body, the valve core penetrates through the valve cavity, one end of the valve core penetrates out of one end, connected with the mounting seat, of the valve body, the moving path of the valve core comprises a first communication section, a disconnection section and a second communication section, and the disconnection section is located between the first communication section and the second communication section;
when the valve core is located in the first communication interval, the oil inlet channel is communicated with the first connecting channel, and the oil return channel is communicated with the second connecting channel;
when the valve core is in the disconnection area, the oil inlet channel, the oil return channel, the first connecting channel and the second connecting channel are not communicated with each other, and the main distribution valve is in the static state;
when the valve core is located in the second communication interval, the oil inlet channel is communicated with the second connecting channel, and the oil return channel is communicated with the first connecting channel.
3. The built-in self-centering double-end-regulation main pressure distribution valve set according to claim 2, wherein a limiting hole extending along the lengthwise direction of the valve core is formed in the surface, facing the main distribution valve, of the mounting seat;
the control mechanism further comprises a limiting piece, one end of the limiting piece is movably limited in the limiting hole along the longitudinal direction of the valve core, the other end of the limiting piece extends out of the limiting hole, and one end of the limiting piece, which is limited in the limiting hole, is sealed with the inner wall of the limiting hole when moving in the limiting hole so as to form a fixed middle cavity in a surrounding manner;
the control mechanism further comprises a centering assembly, wherein the centering assembly comprises a floating communication state and a centering communication state;
when the centering assembly is in the floating communication state, the centering cavity is communicated with the oil return channel through the centering assembly; when the centering assembly is in the centering communication state, the centering cavity is communicated with the oil inlet channel through the centering assembly;
when the limiting piece is located at the centering position, one end of the limiting piece extending out of the limiting hole can be abutted against one end of the valve core penetrating out of the valve body, so that the valve core is limited in the disconnection section and the second connection section.
4. The set of built-in self-resetting double-ended regulating main distributing valves according to claim 3, wherein the communication assembly comprises a first proportional control valve, a first switching valve and a second switching valve arranged on the mounting seat;
the first proportional control valve is respectively communicated with the oil inlet channel, the oil return channel and the first switching valve;
the first switching valve is communicated with the first proportional control valve, the oil return channel and the second switching valve respectively;
the second switching valve is communicated with the oil return channel and the control cavity respectively;
when the communication assembly is in the first communication state, the oil inlet channel is communicated with the control cavity sequentially through the first proportional control valve, the first switching valve and the second switching valve;
when the communication assembly is in the second communication state, the control cavity is communicated with the oil return channel sequentially through the second switching valve, the first switching valve and the first proportional control valve.
5. The set of built-in self-centering double-ended regulating main pressure distributing valve set according to claim 4, wherein the communication assembly further comprises a third switching valve and a fourth switching valve disposed on the mounting seat;
the second switching valve is also communicated with the centering assembly;
the third switching valve is respectively communicated with the first proportional control valve and the oil return channel;
the fourth switching valve is respectively communicated with the centering assembly and the oil return channel;
when the communication assembly is in the first communication state, the centering assembly is communicated with the oil inlet channel sequentially through the second switching valve, the first switching valve and the first proportional control valve, so that the centering assembly is in the floating communication state;
when the communication assembly is in the second communication state, the centering assembly is communicated with the oil inlet channel sequentially through the fourth switching valve, the third switching valve and the first proportional control valve, so that the centering assembly is in the floating communication state.
6. The built-in self-resetting double-ended regulating main pressure distributing valve set according to claim 5, wherein the communication assembly further comprises a third communication state and a fourth communication state, and the communication assembly further comprises a second proportional control valve;
the second proportional control valve is respectively communicated with the oil inlet channel, the oil return channel, the first switching valve and the third switching valve;
when the communication assembly is in the third communication state, the oil inlet channel is communicated with the control cavity sequentially through the second proportional control valve, the first switching valve and the second switching valve;
when the communication assembly is in the fourth communication state, the control cavity is communicated with the oil return channel sequentially through the second switching valve, the first switching valve and the second proportional control valve.
7. The built-in self-resetting double-ended regulating main pressure distributing valve set according to claim 5, wherein the communication assembly further comprises a fifth communication state and a sixth communication state, and the communication assembly further comprises a third proportional control valve;
the third proportional control valve is respectively communicated with the oil inlet channel, the oil return channel, the second switching valve and the fourth switching valve;
when the communication assembly is in the fifth communication state, the oil inlet channel is communicated with the control cavity sequentially through the third proportional control valve and the second switching valve;
when the communication assembly is in the sixth communication state, the control cavity is communicated with the oil return channel sequentially through the second switching valve and the third proportional control valve.
8. The built-in self-centering double-end regulating main pressure distribution valve group according to claim 3, wherein the centering assembly comprises a shuttle valve and a hydraulic control reversing valve which are communicated with each other, the shuttle valve is also communicated with the communication assembly, and the hydraulic control reversing valve is respectively communicated with the centering cavity, the oil return channel and the oil inlet channel;
when the centering assembly is in the floating communication state, the hydraulic control reversing valve is communicated with the oil inlet channel through the shuttle valve and the communication assembly, and the centering cavity is communicated with the oil return channel through the hydraulic control reversing valve;
when the centering assembly is in the centering communication state, the hydraulic control reversing valve is communicated with the oil return passage through the shuttle valve, and the centering cavity is communicated with the oil inlet passage through the hydraulic control reversing valve.
9. The built-in self-resetting double-end regulating main pressure distributing valve group according to claim 8, wherein the control mechanism further comprises a stop valve, the stop valve is respectively communicated with the oil inlet channel, the oil return channel and the hydraulic control reversing valve, and the stop valve comprises a stop state and a working state;
when the tight stop valve is in the tight stop state, the centering assembly is in the floating communication state, the oil inlet channel is communicated with the oil return channel through the tight stop valve, and the centering cavity is communicated with the oil return channel through the hydraulic control reversing valve and the tight stop valve in sequence.
10. A turbine governor system comprising a built-in self-resetting double-ended regulating main distribution valve bank according to any one of claims 1 to 9.
CN202010008378.1A 2020-01-06 2020-01-06 Water turbine speed regulating system and built-in self-resetting double-end regulating main pressure distributing valve set thereof Active CN111043096B (en)

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002317745A (en) * 2001-04-18 2002-10-31 Toshiba Corp Guide vane operating device and method for hydraulic machinery
JP2004225589A (en) * 2003-01-22 2004-08-12 Toshiba Corp Water stop valve opening and closing device for hydraulic machinery
JP2007303387A (en) * 2006-05-11 2007-11-22 Toshiba Corp Speed governor for hydraulic machine
CN201003462Y (en) * 2006-12-31 2008-01-09 武汉事达电气股份有限公司 Horizontal self-centering hydraulic control main pressure dividing valve
CN101619702A (en) * 2009-07-31 2010-01-06 国网电力科学研究院 Novel device for realizing automatic reset function of speed regulating system of water-turbine generator set
CN201835975U (en) * 2010-11-03 2011-05-18 湖南华自科技有限公司 Electro-hydraulic convertor of turbine governor
CN203570504U (en) * 2013-09-24 2014-04-30 国家电网公司 Novel device for realizing on/off selections of automatic resetting function of main distributing valve in speed regulating system
CN204877778U (en) * 2015-06-30 2015-12-16 南京南瑞集团公司 Novel device of pure mechanical manual control of hydroelectric set speed control system
CN208518993U (en) * 2018-07-13 2019-02-19 国电南瑞科技股份有限公司 A kind of control device of the main control valve of single-ended control

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002317745A (en) * 2001-04-18 2002-10-31 Toshiba Corp Guide vane operating device and method for hydraulic machinery
JP2004225589A (en) * 2003-01-22 2004-08-12 Toshiba Corp Water stop valve opening and closing device for hydraulic machinery
JP2007303387A (en) * 2006-05-11 2007-11-22 Toshiba Corp Speed governor for hydraulic machine
CN201003462Y (en) * 2006-12-31 2008-01-09 武汉事达电气股份有限公司 Horizontal self-centering hydraulic control main pressure dividing valve
CN101619702A (en) * 2009-07-31 2010-01-06 国网电力科学研究院 Novel device for realizing automatic reset function of speed regulating system of water-turbine generator set
CN201835975U (en) * 2010-11-03 2011-05-18 湖南华自科技有限公司 Electro-hydraulic convertor of turbine governor
CN203570504U (en) * 2013-09-24 2014-04-30 国家电网公司 Novel device for realizing on/off selections of automatic resetting function of main distributing valve in speed regulating system
CN204877778U (en) * 2015-06-30 2015-12-16 南京南瑞集团公司 Novel device of pure mechanical manual control of hydroelectric set speed control system
CN208518993U (en) * 2018-07-13 2019-02-19 国电南瑞科技股份有限公司 A kind of control device of the main control valve of single-ended control

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
安刚等: "新疆布仑口-公格尔水电站冲击式水轮机调速器机械液压系统设计", 《长江科学院院报》 *
章宏甲等: "《液压与气压传动》", 30 June 2001, 机械工业出版社 *

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