CN216361021U - Servomotor device for controlling opening degree of speed-regulating valve of steam turbine - Google Patents
Servomotor device for controlling opening degree of speed-regulating valve of steam turbine Download PDFInfo
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- CN216361021U CN216361021U CN202220083371.0U CN202220083371U CN216361021U CN 216361021 U CN216361021 U CN 216361021U CN 202220083371 U CN202220083371 U CN 202220083371U CN 216361021 U CN216361021 U CN 216361021U
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Abstract
The utility model discloses a servomotor device for controlling the opening degree of a speed-regulating valve of a steam turbine, which comprises: the bottom end of the servomotor bracket is fixed on the speed regulation valve shell; the bottom end of the hydraulic servomotor is fixedly connected with the top end of the hydraulic servomotor bracket, the interior of the hydraulic servomotor is divided into a lower rodless cavity and an upper rod cavity by a piston, an oil inlet and an oil outlet which are communicated with the lower rodless cavity and the upper rod cavity are respectively arranged on a casing of the hydraulic servomotor, and a piston rod of the hydraulic servomotor is positioned in the upper rod cavity; and one end of the vertical pulling rod component is fixedly connected with the rod end of the piston rod far away from the oil-operated machine, and the other end of the vertical pulling rod component is fixedly connected with a speed regulating valve rod penetrating through the speed regulating valve shell. During operation, hydraulic oil enters into no pole intracavity down through the oil inlet, promotes the piston rod rebound, and the piston rod drives to carry draws and draws montant subassembly rebound, and then drives the speed governing valve rod and upwards opens the speed governing valve. The device can solve the problems of insufficient lifting force, easy oil leakage, elimination of jam of the speed regulation valve and the like of the speed regulation valve oil-operated machine.
Description
Technical Field
The utility model relates to the technical field of steam distribution of a speed-regulating valve of a steam turbine, in particular to a servomotor device for controlling the opening degree of the speed-regulating valve of the steam turbine.
Background
In the current continuous development of industrialization, a steam turbine is a main device in industries such as modern thermal power generation, steel plants and the like. The steam turbine uses steam as a working medium, and the steam turbine rotor is pushed to rotate by expansion acting through a main steam valve and a speed regulation steam valve sequentially through a stationary blade and a moving blade so as to convert the heat energy of the steam into mechanical energy. The speed regulating steam valve servomotor of the steam turbine is a hydraulic servo motor of a steam distribution system of the steam turbine, generates driving force for driving a steam distribution mechanism to act according to a control signal of an intermediate amplifier, and reaches a preset opening position, so that the servomotor is required to accurately control the opening of the speed regulating steam valve, and the steam turbine is reasonably controlled to enter the steam turbine to stabilize the operation of the steam turbine.
At present, the speed regulation valve of the turboset mostly adopts an EH oil system to control an oil-operated machine to control the opening and closing of the speed regulation valve. The oil cylinder of the hydraulic servomotor is directly connected with a speed regulation valve of the steam turbine by adopting a piston rod facing downwards, and an opening limiting mechanism is arranged in the oil cylinder. The following problems mainly exist in use: (1) the servomotor is closer to the cylinder body of the steam turbine, so that the temperature of the servomotor body is high, and in addition, the piston rod of the servomotor faces downwards and is close to the steam turbine, so that the temperature of a piston rod sealing ring is easily increased, the sealing ring on the servomotor is easily damaged, the oil cylinder is easy to leak oil, the service life is short, the overhaul period is short, and the steam turbine accessory is easy to have a fire accident when leaking oil, so that the safety and the economy of a unit are seriously influenced; (2) the opening of the speed regulation valve requires the lifting of a piston of the servomotor to compress the opening of a spring control valve, so that the lifting force of the servomotor depends on oil pressure, the force of the compression spring, resistance generated by steam and the like.
Therefore, the technical staff in the field needs to solve the problem how to provide a servomotor device for controlling the opening degree of a speed regulation valve of a steam turbine, which can solve the problems of insufficient lifting force of the speed regulation valve servomotor, easy oil leakage, and elimination of jam of the speed regulation valve.
SUMMERY OF THE UTILITY MODEL
In view of the above, the utility model provides a steam turbine speed regulation valve opening control servomotor device which can solve the problems of insufficient lifting force of a speed regulation valve servomotor, easy oil leakage, elimination of jam of a speed regulation valve and the like.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a servomotor device for controlling the opening of a speed-regulating valve of a steam turbine, comprising:
the bottom end of the servomotor bracket is fixed on the speed regulation valve shell;
the bottom end of the servomotor is fixedly connected with the top end of the servomotor support, the interior of the servomotor is divided into a lower rodless cavity and an upper rod cavity by a piston, an oil inlet and an oil outlet which are communicated with the lower rodless cavity and the upper rod cavity are respectively arranged on a casing of the servomotor, and a piston rod of the servomotor is positioned in the upper rod cavity and extends out of the servomotor to extend upwards;
and one end of the lifting vertical rod component is fixedly connected with the rod end of the piston rod far away from the servomotor, and the other end of the lifting vertical rod component is fixedly connected with a speed regulation valve rod penetrating through the speed regulation valve shell.
According to the technical scheme, compared with the prior art, the utility model discloses the servomotor device for controlling the opening of the speed-regulating valve of the steam turbine. The device changes the original hydraulic servomotor pulling speed regulation valve into pushing speed regulation valve, changes the original rod cavity oil inlet into rodless cavity oil inlet, increases the stress area of the piston rod under the condition of unchanged oil pressure, equivalently increases the thrust of the hydraulic servomotor, solves the problems of insufficient lifting force of the hydraulic servomotor and elimination of valve jam. And the rodless cavity of the servomotor is used as a high oil pressure side, so that the phenomenon of oil leakage caused by high pressure on a piston rod sealing ring is avoided, and the problems of easy oil leakage and safety of the speed-regulating valve servomotor are solved. Meanwhile, the piston rod of the servomotor is changed from downward to upward, and the servomotor is far away from the steam turbine, so that the sealing temperature at the piston rod can be reduced, and the service life of the servomotor is prolonged.
Further, the lifting vertical rod component comprises:
the piston top plate is fixedly connected with the rod end of the piston rod, which is far away from the oil-operated machine;
one end of the vertical lifting rod is fixedly connected with the piston top plate;
the lower supporting beam is fixedly connected with the other end of the lifting vertical rod, and the bottom end of the lower supporting beam is fixedly connected with the speed regulation valve rod.
The beneficial effect who adopts above-mentioned technical scheme to produce is that, the piston rod drives the piston roof and reciprocates, and then drives and carry and draw the montant and reciprocate, carries and draws the montant and drive the lower support beam and reciprocate, and the lower support beam drives speed governing valve rod and reciprocates to the regulation of speed governing valve aperture has been realized. The vertical lifting rod component has the advantages of simple structure, easy processing and manufacturing and low production cost; and this area can accommodate different sizes of motors.
Furthermore, the servomotor support is of a U-shaped structure, an opening of the servomotor support is arranged downwards and is fixedly connected with the speed regulation valve shell, and the lower supporting beam is arranged in the servomotor support and is positioned above the speed regulation valve shell.
The beneficial effect that adopts above-mentioned technical scheme to produce is that servomotor support is U-shaped structure, can restrict the stroke of lower supporting beam, is about to change former servomotor inside spacing into the outside spacing of lower supporting beam, avoids the servomotor switch excessive servomotor to damage the speed governing valve.
Furthermore, the lifting rod is arranged on the top of the oil motor shell in a penetrating mode.
The beneficial effect that adopts above-mentioned technical scheme to produce is, carries out spacing direction to carrying on reciprocating of drawing the montant to realize stability and linearity when lower supporting beam drives speed governing valve rod and reciprocates, guaranteed the precision of speed governing valve aperture regulation.
Furthermore, the two vertical lifting rods are arranged at intervals and symmetrically arranged on two sides of the servomotor.
The beneficial effect that adopts above-mentioned technical scheme to produce is for guidance quality when speed governing valve rod reciprocates is better.
Further, still including fixing spacing bottom plate on the deflector top, be fixed with the bracing piece on the spacing bottom plate, the bracing piece is kept away from the rod end of spacing bottom plate is fixed with spacing roof, the piston roof is arranged in spacing bottom plate with between the spacing roof, the spiro union has spacing jackscrew on the spacing roof, spacing jackscrew and piston roof top butt.
The beneficial effect that adopts above-mentioned technical scheme to produce is that, spacing bottom plate and spacing roof can carry on spacingly to the piston roof to combine the servomotor support to be the U-shaped structure, thereby reach the dual spacing of speed governing valve aperture, and still can control the biggest aperture of speed governing valve through spacing jackscrew, avoid the speed governing valve to open excessively and damage the steam turbine.
Furthermore, the two support rods are arranged at intervals and symmetrically arranged on two sides of the piston top plate.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic axial side structure diagram of a servomotor device for controlling the opening degree of a speed regulation valve of a steam turbine provided by the utility model.
Fig. 2 is a side view of the structure of fig. 1.
Fig. 3 is a schematic bottom view of fig. 1.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to fig. 3, an embodiment of the present invention discloses a servomotor device for controlling the opening degree of a speed regulation valve of a steam turbine, including:
the bottom end of the servomotor bracket 1 is fixed on the speed regulation valve shell 2;
the bottom end of the servomotor 3 is fixedly connected with the top end of the servomotor support 1, the interior of the servomotor 3 is divided into a lower rodless cavity and an upper rod cavity by a piston, an oil inlet 301 and an oil outlet 302 communicated with the lower rodless cavity and the upper rod cavity are respectively arranged on a shell of the servomotor 3, and a piston rod 31 of the servomotor 3 is positioned in the upper rod cavity and extends upwards out of the servomotor 3;
and one end of the lifting vertical rod component 4 is fixedly connected with the rod end of the piston rod 31 far away from the servomotor 3, and the other end of the lifting vertical rod component 4 is fixedly connected with the speed regulation valve rod 21 penetrating through the speed regulation valve shell 2.
The lifting vertical rod component 4 comprises:
the piston top plate 41, the piston top plate 41 is fixedly connected with the rod end of the piston rod 31 far away from the servomotor 3;
a lifting vertical rod 42, wherein one end of the lifting vertical rod 42 is fixedly connected with the piston top plate 41;
and the bottom end of the lower support beam 43 is fixedly connected with the speed regulation valve rod 21.
The servomotor bracket 1 is of a U-shaped structure, the opening of the servomotor bracket 1 is arranged downwards and is fixedly connected with the speed regulation valve shell 2, and the lower supporting beam 43 is arranged in the servomotor bracket 1 and is positioned above the speed regulation valve shell 2.
The servomotor device for controlling the opening degree of the speed regulation valve of the steam turbine further comprises a guide plate 5 fixed on the top of the shell of the servomotor 3, and a lifting vertical rod 42 is arranged in a penetrating mode through the guide plate 5.
The two vertical pulling rods 42 are arranged at intervals and are symmetrically arranged on two sides of the servomotor 3.
The servomotor device of steam turbine speed governing valve aperture control still is fixed with bracing piece 7 including fixing the limiting bottom plate 6 on 5 tops of deflector, on the limiting bottom plate 6, the rod end that limiting bottom plate 6 was kept away from to bracing piece 7 is fixed with limiting top plate 8, and piston roof 41 is arranged in between limiting bottom plate 6 and limiting top plate 8, and the spiro union has limiting jackscrew 9 on the limiting top plate 8, and limiting jackscrew 9 and the 41 top butt of piston roof.
The support rods 7 are arranged at intervals and are symmetrically arranged on two sides of the piston top plate 41.
Opening a speed regulation valve: hydraulic oil enters the lower rodless cavity through the oil inlet, the piston rod is pushed to move upwards, the piston rod drives the lifting vertical rod assembly to move upwards, and then the speed regulation valve is driven to open upwards through the valve rod of the speed regulation valve.
Closing a speed regulation valve: the hydraulic oil inlet is controlled by a hydraulic valve to be converted into an oil discharge port, the speed regulation valve is compressed by internal spring force and drives the piston rod to move downwards, and oil pressure in the rodless cavity is retracted to the oil tank, so that the speed regulation valve is closed.
The device changes the original hydraulic servomotor pulling speed regulation valve into pushing speed regulation valve, changes the original rod cavity oil inlet into rodless cavity oil inlet, increases the stress area of the piston rod under the condition of unchanged oil pressure, equivalently increases the thrust of the hydraulic servomotor, solves the problems of insufficient lifting force of the hydraulic servomotor and elimination of valve jam. And the rodless cavity of the servomotor is used as a high oil pressure side, so that the phenomenon of oil leakage caused by high pressure on a piston rod sealing ring is avoided, and the problems of easy oil leakage and safety of the speed-regulating valve servomotor are solved. Meanwhile, the piston rod of the servomotor is changed from downward to upward, and the servomotor is far away from the steam turbine, so that the sealing temperature at the piston rod can be reduced, and the service life of the servomotor is prolonged.
And the servomotor support is the U-shaped structure, can limit the stroke of the lower supporting beam, namely change the internal limit of the original servomotor into the external limit of the lower supporting beam, avoid the servomotor to switch the excessive servomotor to damage the speed governing valve. Meanwhile, the limiting bottom plate and the limiting top plate can limit the piston top plate, so that double limiting of the opening degree of the speed regulation valve is achieved, the maximum opening degree of the speed regulation valve can be controlled through the limiting top screw, and the steam turbine is prevented from being damaged due to excessive opening of the speed regulation valve.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. The utility model provides a servomotor device of steam turbine speed governing valve aperture control which characterized in that includes:
the bottom end of the servomotor bracket (1) is fixed on the speed regulation valve shell (2);
the bottom end of the servomotor (3) is fixedly connected with the top end of the servomotor support (1), the interior of the servomotor (3) is divided into a lower rodless cavity and an upper rod cavity by a piston, an oil inlet (301) and an oil outlet (302) communicated with the lower rodless cavity and the upper rod cavity are respectively arranged on a shell of the servomotor (3), and a piston rod (31) of the servomotor (3) is positioned in the upper rod cavity and extends upwards out of the servomotor (3);
and the lifting vertical rod component (4), one end of the lifting vertical rod component (4) is fixedly connected with the rod end of the piston rod (31) far away from the servomotor (3), and the other end of the lifting vertical rod component is fixedly connected with a speed regulation valve rod (21) penetrating through the speed regulation valve shell (2).
2. The servomotor device for the control of the opening degree of a speed governing valve of a steam turbine as claimed in claim 1, wherein the lifting rod assembly (4) comprises:
the piston top plate (41), the piston top plate (41) is fixedly connected with the rod end of the piston rod (31) far away from the servomotor (3);
one end of the vertical lifting rod (42) is fixedly connected with the piston top plate (41);
a lower supporting beam (43), lower supporting beam (43) with carry and pull montant (42) other end fixed connection, lower supporting beam (43) bottom with speed governing valve rod (21) fixed connection.
3. The servomotor device for controlling the opening degree of the speed regulation valve of the steam turbine according to claim 2, wherein the servomotor bracket (1) has a U-shaped structure, the opening of the servomotor bracket (1) is arranged downward and is fixedly connected with the speed regulation valve housing (2), and the lower support beam (43) is disposed in the servomotor bracket (1) and above the speed regulation valve housing (2).
4. The servomotor device for controlling the opening degree of the speed regulating valve of the steam turbine according to claim 2 or 3, further comprising a guide plate (5) fixed on the top of the casing of the servomotor (3), wherein the vertical lifting rod (42) is arranged through the guide plate (5).
5. The servomotor device for controlling the opening degree of the speed regulating valve of the steam turbine as claimed in claim 4, wherein the two vertical pulling rods (42) are arranged at intervals and are symmetrically arranged on both sides of the servomotor (3).
6. The servomotor device for controlling the opening degree of the speed-regulating valve of the steam turbine according to claim 4, further comprising a limiting bottom plate (6) fixed on the top end of the guide plate (5), wherein a support rod (7) is fixed on the limiting bottom plate (6), a limiting top plate (8) is fixed on the rod end of the support rod (7) far away from the limiting bottom plate (6), the piston top plate (41) is arranged between the limiting bottom plate (6) and the limiting top plate (8), a limiting top wire (9) is screwed on the limiting top plate (8), and the limiting top wire (9) abuts against the top end of the piston top plate (41).
7. The servomotor device for controlling the opening degree of a speed governing valve of a steam turbine according to claim 6, wherein the support rods (7) are arranged at intervals and symmetrically arranged on both sides of the piston top plate (41).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220083371.0U CN216361021U (en) | 2022-01-13 | 2022-01-13 | Servomotor device for controlling opening degree of speed-regulating valve of steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220083371.0U CN216361021U (en) | 2022-01-13 | 2022-01-13 | Servomotor device for controlling opening degree of speed-regulating valve of steam turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216361021U true CN216361021U (en) | 2022-04-22 |
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ID=81192475
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220083371.0U Active CN216361021U (en) | 2022-01-13 | 2022-01-13 | Servomotor device for controlling opening degree of speed-regulating valve of steam turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216361021U (en) |
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2022
- 2022-01-13 CN CN202220083371.0U patent/CN216361021U/en active Active
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