CN214888059U - Piston type oil-operated machine and steam turbine - Google Patents
Piston type oil-operated machine and steam turbine Download PDFInfo
- Publication number
- CN214888059U CN214888059U CN202120602445.2U CN202120602445U CN214888059U CN 214888059 U CN214888059 U CN 214888059U CN 202120602445 U CN202120602445 U CN 202120602445U CN 214888059 U CN214888059 U CN 214888059U
- Authority
- CN
- China
- Prior art keywords
- piston
- servomotor
- control
- oil
- electromagnet assembly
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Control Of Turbines (AREA)
Abstract
The utility model discloses a piston servomotor and steam turbine. The piston type servomotor comprises a digital regulator, a control valve and a servomotor hydraulic cylinder, wherein the control valve comprises a controller, an electromagnet assembly, a valve body and a control piston arranged in the valve body; the valve body is provided with an oil inlet, an oil outlet and an oil return port, the oil outlet is communicated with the oil inlet or the oil return port through the movement of the control piston, and the oil return port is communicated with a cylinder body of a hydraulic cylinder of the hydraulic servomotor; the control piston is connected with the elastic piece and the movable iron core of the electromagnet assembly, and the acting force of the movable iron core and the elastic piece on the control piston is opposite to control the movement of the control piston; the controller is electrically connected with the signal output end of the digital regulator and the signal input end of the electromagnet assembly and is used for receiving the current signal of the digital regulator and correspondingly controlling the current of the coil in the electromagnet assembly. The control valve is directly integrated in the servomotor to control the position of the servomotor piston, and the servomotor has simple structure and high response speed.
Description
Technical Field
The utility model relates to a steam turbine equipment technical field, in particular to piston servomotor and steam turbine.
Background
In the prior low-pressure turbine oil used as a driving turbine regulating system, the regulating oil is restricted by an electro-hydraulic converter, the flow is generally small, the requirement of a quick-acting servomotor cannot be met, and the regulating oil needs to be amplified. Generally, a piston-type oil engine combined with a cutoff-type staggered throttle is adopted as an amplifying device. However, the piston-type oil engine has a relatively complex structure, a large retardation rate, and a slow response speed.
Therefore, how to provide a piston-type oil engine with simple structure and high response speed is a technical problem which needs to be solved by the technical personnel in the field at present.
SUMMERY OF THE UTILITY MODEL
In view of this, the present invention provides a piston type oil-driven machine, which has a simple structure and a fast response speed. Another object of the present invention is to provide a steam turbine including the above piston-type servomotor, which has a simple structure and a fast response speed.
In order to achieve the above object, the utility model provides a following technical scheme:
a piston type servomotor comprises a digital regulator, a control valve and a servomotor hydraulic cylinder, wherein the control valve comprises a controller, an electromagnet assembly, a valve body and a control piston arranged in the valve body;
the valve body is provided with an oil inlet, an oil outlet and an oil return port, the oil outlet is communicated with the oil inlet or the oil return port through the movement of the control piston, and the oil return port is communicated with a cylinder body of the hydraulic cylinder of the hydraulic servomotor;
the control piston is connected with an elastic piece and a movable iron core of the electromagnet assembly, and the acting force of the movable iron core and the elastic piece on the control piston is opposite to control the movement of the control piston;
the controller is electrically connected with the signal output end of the digital regulator and the signal input end of the electromagnet assembly, and is used for receiving the current signal of the digital regulator and correspondingly controlling the current of the coil in the electromagnet assembly.
Preferably, the servomotor piston is connected with a displacement sensor, and the displacement sensor is electrically connected to a signal input end of the controller.
Preferably, a servomotor piston rod is fixedly arranged on the servomotor piston, and the displacement sensor is fixed on a part of the servomotor piston rod, which extends out of the servomotor hydraulic cylinder.
Preferably, the signal input end of the digital regulator is electrically connected with a control signal input assembly, and the control signal input assembly comprises a rotating speed sensor, a power sensor, a process control loop and an auxiliary control loop.
Preferably, the movable iron core and the elastic member are respectively arranged on two sides of the control piston in the moving direction, and the elastic member is a pressure spring.
Preferably, the valve body is fixedly connected with the cylinder body into a whole.
A steam turbine comprises the piston-type servomotor.
The utility model provides a piston type servomotor, which comprises a digital regulator, a control valve and a servomotor hydraulic cylinder, wherein the control valve comprises a controller, an electromagnet assembly, a valve body and a control piston arranged in the valve body; the valve body is provided with an oil inlet, an oil outlet and an oil return port, the oil outlet is communicated with the oil inlet or the oil return port through the movement of the control piston, and the oil return port is communicated with a cylinder body of a hydraulic cylinder of the hydraulic servomotor; the control piston is connected with the elastic piece and the movable iron core of the electromagnet assembly, and the acting force of the movable iron core and the elastic piece on the control piston is opposite to control the movement of the control piston; the controller is electrically connected with the signal output end of the digital regulator and the signal input end of the electromagnet assembly and is used for receiving the current signal of the digital regulator and correspondingly controlling the current of the coil in the electromagnet assembly.
The control valve is directly integrated in the servomotor to control the position of the servomotor piston, and a complex accelerator mistake structure and the like are not needed to be additionally arranged, so that the structure is simple. In the operation process, the controller can quickly, accurately and proportionally convert the input current signal into the stroke of the control piston, so that the oil supply condition of the control valve to the hydraulic cylinder of the hydraulic servomotor is adjusted to adjust the motion condition of the piston of the hydraulic servomotor, and the response speed is high.
The utility model provides a steam turbine including above-mentioned piston servomotor, its piston servomotor simple structure, response speed are fast.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be 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 cross-sectional view of a piston-type oil-operated machine provided by the present invention;
fig. 2 is a cross-sectional view of a control valve in a piston-type servomotor according to the present invention;
fig. 3 is an electric control diagram of the piston-type servomotor provided by the present invention;
reference numerals:
the hydraulic system comprises a hydraulic servomotor cylinder 1, a cylinder body 11, a hydraulic servomotor piston 12, a hydraulic servomotor piston rod 13, a hydraulic servomotor piston cover 14 and a displacement sensor 15;
the control valve 2, the controller 21, the electromagnet assembly 22, the valve body 23, the oil inlet 231, the oil return opening 232, the oil outlet 233, the control piston 24 and the elastic element 25;
a digital regulator 3.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The core of the utility model is to provide a piston servomotor, its simple structure, response speed are fast. The other core of the utility model is to provide a steam turbine including above-mentioned piston servomotor, its piston servomotor simple structure, response speed are fast.
In the first embodiment of the piston-type servomotor of the present invention, please refer to fig. 1 to 3, which includes a digital regulator 3, a control valve 2 and a servomotor cylinder 1.
The control valve 2 comprises a controller 21, a solenoid assembly 22, a valve body 23 and a control piston 24 arranged in the valve body 23.
The valve body 23 is provided with an oil inlet 231, an oil outlet 233 and an oil return port 232. By controlling the movement of the piston 24, the oil outlet 233 is communicated with the oil inlet 231 to feed oil to the hydraulic cylinder 1 of the hydraulic servomotor; or the oil outlet 233 and the oil return port 232 are communicated with each other, so that the engine cylinder 1 returns oil to the oil return port 232 through the oil outlet 233. Accordingly, movement of the control piston 24 also adjusts the opening of the oil return port 232 and the oil inlet port 231.
The oil return port 232 is communicated with the hydraulic cylinder 1 of the hydraulic engine, so that the hydraulic cylinder 1 of the hydraulic engine can be used for oil inlet or oil return through the control valve 2, the piston 12 of the hydraulic engine of the hydraulic cylinder 1 of the hydraulic engine can move under the control of oil, and then the piston 12 of the hydraulic engine can execute other actions.
The control piston 24 connects the elastic member 25 and the plunger of the electromagnet assembly 22, and the plunger and the elastic member 25 oppose the force of the control piston 24 to control the movement of the control piston 24. Specifically, the plunger may be fixedly connected to the control piston 24 by means of rods that do not have magnetism.
The controller 21 is electrically connected to the signal output terminal of the digital regulator 3 and the signal input terminal of the electromagnet assembly 22, and the controller 21 is configured to receive the current signal from the digital regulator 3 and correspondingly control the current of the coil in the electromagnet assembly 22, optionally, the current is in the range of 4-20 mA. The coil is specifically connected with direct current, and after the current magnitude and direction in the coil are changed, the magnetic force magnitude and direction of the movable iron core are also correspondingly changed, so that the position and the motion direction of the control piston 24 are changed, the communication conditions of the two external oil ports of the oil inlet 231 and the oil return port 232 and the oil outlet 233 are switched, and the opening degree of the external oil port communicated with the oil outlet 233 can be changed.
In the embodiment, the control valve 2 is directly integrated in the servomotor to control the position of the servomotor piston 12, and a complex structure such as a wrong accelerator is not required to be additionally arranged, so that the structure is simple. During operation, the controller 21 can convert the input current signal into the stroke of the control piston 24 quickly, accurately and proportionally, so as to adjust the oil supply condition of the control valve 2 to the hydraulic cylinder 1 of the servomotor to adjust the motion condition of the servomotor piston 12, and the response speed is high, so that the method is applicable to application environments frequently used for dynamically and accurately changing the flow rate.
Further, the servomotor piston 12 is connected to a displacement sensor 15, and the displacement sensor 15 is electrically connected to a signal input terminal of the controller 21. Through the arrangement of the displacement sensor 15, the controller 21 can detect the displacement condition of the servomotor piston 12 in real time. In addition, the controller 21 may control the control valve 2 according to the displacement, for example, when the displacement sensor 15 detects that the servomotor piston 12 moves to a set position, the controller 21 may set the control piston 24 to a neutral position so that the oil amount in the cylinder 11 is not changed and the position of the servomotor piston 12 is maintained.
Furthermore, the servomotor piston 12 is fixedly provided with a servomotor piston rod 13, and the displacement sensor 15 is fixed on the part of the servomotor piston rod 13 extending out of the servomotor cylinder 1, so that the displacement sensor 15 can be conveniently assembled and disassembled and can be electrically connected with the controller 21. Of course, in other embodiments, the displacement sensor 15 may be built into the cylinder 11.
Further, a signal input end of the digital regulator 3 is electrically connected with a control signal input assembly, and the control signal input assembly specifically comprises a rotating speed sensor, a power sensor, a process control loop and an auxiliary control loop. The digital regulator 3 generates a corresponding current signal according to the operation information input by the control signal input component so as to adapt to the operation condition of the equipment.
Further, the movable iron core and the elastic member 25 are respectively disposed on both sides of the control piston 24 in the moving direction, and the elastic member 25 is a compression spring, thereby reasonably utilizing the internal space of the control valve 2. Of course, in other embodiments, the elastic element 25 may be provided as a tension spring, and accordingly, the plunger and the elastic element 25 are respectively provided on the same side of the control piston 24 in the moving direction.
Further, the valve body 23 is fixedly connected with the cylinder 11 into a whole, so that the transportation of the equipment is facilitated.
The utility model provides a piston servomotor's theory of operation as follows:
the digital regulator 3 receives a rotating speed signal input by a rotating speed sensor, an electric power signal input by a power sensor and a control signal input by a loop such as process control, auxiliary control and the like, and outputs a standard current signal to the controller 21 after resolving;
according to the current signal, the controller 21 controls the current in the coil of the electromagnet assembly 22, and the movable iron core of the electromagnet assembly 22 generates a magnetic force to the control piston 24FMagWhich is proportional to the magnitude of the current in the coil. The movable iron core of the electromagnet assembly 22 acts on the control piston 24, and the control piston 24 can adaptively compress the compression spring until the compression spring exerts an elastic force on the control piston 24FFPressure of movable iron core to control piston 24FMagSimilarly, the oil outlet 233 is switched to be communicated with the oil inlet 231 or the oil return port 232, and the opening degree of the oil inlet 231 or the oil return port 232 can be adjusted, so that the stroke of the servomotor piston 12 is adjusted;
when the servomotor piston 12 moves, the linear displacement sensor 15 sends a valve position feedback signal back to the controller 21, and cancels a command signal input by the digital regulator 3, so that the control piston 24 returns to the middle position, and the oil feeding or draining to the hydraulic cylinder is cut off, and the servomotor is stabilized at a new position.
The piston-type servomotor that this embodiment provided, its simple structure is compact, and the application scope is extensive, can ensure very accurate and highly dynamic mass flow control, and response speed is faster, moves more reliable advantage, and processing preparation is convenient simultaneously, can improve steam turbine operation fail safe nature.
In addition to the piston-type servomotor, the utility model also provides a steam turbine, specifically is the steam turbine that adopts the electricity-liquid governing system. The steam turbine comprises a piston type servomotor, specifically can be the piston type servomotor provided in any one of the above embodiments, and the beneficial effects can be obtained by referring to the above embodiments correspondingly. The structure of other parts of the steam turbine is referred to the prior art, and is not described herein again.
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 "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present invention.
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.
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.
It is right above that the utility model provides a piston servomotor and steam turbine have carried out detailed introduction. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.
Claims (7)
1. The piston type servomotor is characterized by comprising a digital regulator (3), a control valve (2) and a servomotor hydraulic cylinder (1), wherein the control valve (2) comprises a controller (21), an electromagnet assembly (22), a valve body (23) and a control piston (24) arranged in the valve body (23);
an oil inlet (231), an oil outlet (233) and an oil return opening (232) are formed in the valve body (23), the oil outlet (233) is communicated with the oil inlet (231) or the oil return opening (232) through the movement of the control piston (24), and the oil return opening (232) is communicated with a cylinder body (11) of the hydraulic cylinder (1) of the hydraulic servomotor;
the control piston (24) is connected with an elastic piece (25) and a movable iron core of the electromagnet assembly (22), and the acting force of the movable iron core and the elastic piece (25) on the control piston (24) is opposite to each other so as to control the movement of the control piston (24);
the controller (21) is electrically connected to a signal output end of the digital regulator (3) and a signal input end of the electromagnet assembly (22), and the controller (21) is used for receiving a current signal of the digital regulator (3) and correspondingly controlling the current of a coil in the electromagnet assembly (22).
2. The piston servomotor of claim 1, wherein the servomotor piston (12) of the servomotor cylinder (1) is connected to a displacement sensor (15), the displacement sensor (15) being electrically connected to a signal input of the controller (21).
3. The piston type servomotor according to claim 2, wherein the servomotor piston (12) is fixedly provided with a servomotor piston rod (13), and the displacement sensor (15) is fixed to a portion of the servomotor piston rod (13) that protrudes outside the servomotor cylinder (1).
4. A piston-type oil engine according to any one of claims 1 to 3, characterized in that the signal input of the digital regulator (3) is electrically connected to a control signal input assembly comprising a rotational speed sensor, a power sensor, a process control loop and an auxiliary control loop.
5. A piston-type oil-driven machine according to any one of claims 1 to 3, characterized in that the plunger and the elastic member (25) are provided on both sides of the control piston (24) in the moving direction, respectively, and the elastic member (25) is a compression spring.
6. A piston-type oil engine according to any one of claims 1 to 3, characterized in that the valve body (23) is fixedly connected in one piece with the cylinder block (11).
7. A steam turbine comprising the piston engine of any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120602445.2U CN214888059U (en) | 2021-03-24 | 2021-03-24 | Piston type oil-operated machine and steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120602445.2U CN214888059U (en) | 2021-03-24 | 2021-03-24 | Piston type oil-operated machine and steam turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214888059U true CN214888059U (en) | 2021-11-26 |
Family
ID=79038117
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120602445.2U Active CN214888059U (en) | 2021-03-24 | 2021-03-24 | Piston type oil-operated machine and steam turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214888059U (en) |
-
2021
- 2021-03-24 CN CN202120602445.2U patent/CN214888059U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201769389U (en) | Hydraulic press | |
| CN105156391A (en) | Composite variable pump and hydraulic control system using composite variable pump | |
| CN104989692B (en) | Compound control-type variable pump and control method thereof | |
| CN109695599B (en) | Variable hydraulic system, pump output flow control method and engineering machinery | |
| CN107489663B (en) | A kind of variable pump and the hydraulic control system with variable pump | |
| CN102518609A (en) | High speed punch hydraulic system | |
| CN202500840U (en) | Electrohydraulic actuating mechanism with servo proportioning valve | |
| CN204312430U (en) | A kind of plug-in type proportional throttle valve | |
| Zhong et al. | Dynamic performance and control accuracy of a novel proportional valve with a switching technology-controlled pilot stage | |
| CN214888059U (en) | Piston type oil-operated machine and steam turbine | |
| CN2900921Y (en) | Magnetic flux damper and magnetic rheological pneumatic servo system | |
| CN100492874C (en) | Diesel engine linear electric motor speed regulating actuator | |
| CN105090144A (en) | Pre-loaded large-applied-force hydraulic system | |
| CN2324308Y (en) | Electric valve control cylinder type electrohydraulic servo device for speed regulator of hydroturbine | |
| CN212272689U (en) | Load sensitive proportional multi-way valve | |
| CN206439081U (en) | A kind of Compact modular hydraulic drive mechanism | |
| CN111577689B (en) | Flow saturation resisting method for load sensitive proportional multi-way valve | |
| CN111022404B (en) | Reversing valve, hydraulic system and engineering machinery | |
| CN213744225U (en) | Power controller of hydraulic pump | |
| CN111486147B (en) | Load-sensitive proportional multi-way valve | |
| CN109812615B (en) | Regulating valve system and method with energy regeneration function | |
| CN202381336U (en) | Slide valve position feedback device of helical-lobe compressor | |
| CN209856138U (en) | Hydraulic cylinder | |
| CN110886729B (en) | Single-acting plunger cylinder hydraulic system | |
| CN209671295U (en) | Compound variable pump and compound hydraulic control system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |