CN212716777U - Steam turbine system - Google Patents
Steam turbine system Download PDFInfo
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- CN212716777U CN212716777U CN202021258671.5U CN202021258671U CN212716777U CN 212716777 U CN212716777 U CN 212716777U CN 202021258671 U CN202021258671 U CN 202021258671U CN 212716777 U CN212716777 U CN 212716777U
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Abstract
The application provides a steam turbine system includes, steam turbine body, main oil pump and fast composite set that closes, wherein: an oil filter is arranged between the oil outlet end of the main oil pump and the high-pressure oil inlet end of the quick-closing combined device; the oil filter has better filtering performance, can filter and block foreign matters such as impurity particles and the like in the oil path of the quick-closing combined device, plays a role in cleaning the oil path of the quick-closing combined device, so that high-pressure oil entering the quick-closing combined device is a cleaned oil path, thereby avoiding the jamming or blockage of a shutdown electromagnetic valve and other parts and ensuring the safe and reliable operation of a steam turbine system.
Description
Technical Field
The application relates to the technical field of steam turbines, in particular to a steam turbine system.
Background
The steam turbine is an external combustion rotary machine which can convert steam heat energy into mechanical energy; after steam from a boiler or other steam sources enters a steam turbine, the heat energy of the steam is finally converted into mechanical energy for rotating a rotor of the steam turbine through a series of conversions; the steam is converted in different ways in the steam turbine, thus forming the steam turbine with different working principles.
The quick-closing control device is a set of a steam turbine security system and a control system, can realize normal starting and stopping of the steam turbine, electric and manual emergency stopping, opening and closing of the quick-closing valve and the air extraction quick-closing valve, and can immediately cut off steam inlet of the steam turbine in an emergency state so as to quickly stop a unit; if foreign matters exist in the quick-closing oil way, the jamming or blockage of important parts can be caused, and the safe and stable operation of the unit is seriously influenced.
SUMMERY OF THE UTILITY MODEL
The application provides a steam turbine system to solve and cause the technical problem of part jam or jam when having the foreign matter in the fast oil circuit of closing.
In order to solve the technical problem, the embodiment of the application discloses the following technical scheme:
the application provides a steam turbine system, includes:
steam turbine body, main oil pump and fast composite set that closes, wherein:
an oil filter is arranged between the oil outlet end of the main oil pump and the oil inlet end of the quick-closing combined device.
Optionally, the oil filter comprises a first oil filter and a second oil filter arranged in parallel;
and a switching valve and an oil balance door are arranged between the first oil filter and the second oil filter.
Optionally, the upper end and the lower end of the first oil filter and the second oil filter are respectively provided with an air release door and an accelerator release door.
Optionally, the system further comprises a condenser, and the turbine body is connected with the condenser.
Optionally, the steam turbine body comprises a medium-low pressure cylinder and a high pressure cylinder.
Optionally, the system further comprises a turbine front bearing housing, wherein the main oil pump is disposed in the turbine front bearing housing.
Compared with the prior art, the beneficial effect of this application is:
it can be seen by above-mentioned technical scheme that the steam turbine system that this application provided includes, steam turbine body, main oil pump and fast composite set that closes, wherein: an oil filter is arranged between the oil outlet end of the main oil pump and the oil inlet end of the quick-closing combined device; the oil filter has better filtering performance, can filter and block foreign matters such as impurity particles and the like in the oil path of the quick-closing combined device, and plays a role in cleaning the quick-closing oil path, namely, a set of small oil filter is additionally arranged at the oil inlet of the quick-closing combined device, so that high-pressure oil entering the quick-closing combined device is a cleaned oil path, thereby avoiding the jamming or blockage of other parts and ensuring the safe and reliable operation of a steam turbine system.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a steam turbine system according to an embodiment of the present application.
Wherein:
1-a steam turbine body, 11-a medium-low pressure cylinder, 12-a high pressure cylinder, 2-a main oil pump, 3-a speed-closing combined device, 4-an oil filter, 41-a first oil filter, 42-a second oil filter, 43-a switching valve, 44-an oil balance door, 45-an air release door, 46-an accelerator, 5-a condenser and 6-a front bearing box of the steam turbine.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all 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 application.
Referring to fig. 1, fig. 1 illustrates a basic structure of a steam turbine system provided in an embodiment of the present application. The steam turbine system provided by the embodiment of the present application is explained below with reference to fig. 1.
As shown in fig. 1, an embodiment of the present application provides a steam turbine system, including:
steam turbine body 1, main oil pump 2 and fast composite set 3 that closes, wherein:
an oil filter 4 is arranged between the oil outlet end of the main oil pump 2 and the oil inlet end of the quick-closing combined device 3.
Wherein, the steam turbine body 1 can convert the heat energy of the steam into mechanical energy; the rotor is a general term of a rotating part and comprises a rotating shaft, an impeller, blades and the like; the stator is a general term of a non-rotating part and comprises a cylinder, a steam seal and the like, wherein the cylinder is a shell of a steam turbine and can separate a through-flow part of the steam turbine from the atmosphere to form a closed steam chamber so as to ensure that steam completes an energy conversion process in the steam turbine; in order to prevent collision and friction between the moving and static parts of the steam turbine, a certain gap must be left, and the existence of the gap necessarily causes air leakage, so that steam seals are required to be arranged on the relevant parts of the moving and static parts of the steam turbine.
When steam of an external boiler enters the steam turbine body 1, firstly, heat energy of partial steam is converted into kinetic energy in a nozzle blade cascade of the steam turbine body 1, then the kinetic energy is converted into mechanical energy in a movable blade cascade, an impeller of the steam turbine body 1 rotates, the steam heat energy is finally converted into rotary mechanical energy of the steam turbine body 1, the mechanical energy obtained by conversion at the moment is used as mechanical energy for power generation of a generator, and finally the mechanical energy is converted into electric energy sent by the generator.
The main oil pump 2 supplies oil to each bearing of the unit to provide stable and sufficient pressure oil for the protection device, the main oil pump 2 is one of important parts of the steam turbine, and when the steam turbine body 1 runs at full speed, the main oil pump 2 provides all lubricating oil and security oil for the unit. If air enters the inlet of the main oil pump 2, the system can be unstable. The inlet of the main oil pump 2 must be maintained at a positive pressure which, in normal operation, is provided by the oil injector.
The turbine rotor requires bearing support and therefore the system further comprises a turbine front bearing housing 6, wherein the main oil pump 2 is arranged within the turbine front bearing housing 6.
The overspeed protection device in the traditional sense is used for preventing overspeed danger of a regulating system caused by fault failure and the like, and a turbine needs to be provided with the overspeed protection device which consists of an emergency protector, axial displacement protection and low oil pressure protection; the signaling device is usually called as an emergency protector, when the rotating speed of the steam turbine exceeds a certain numerical value, the emergency protector acts to quickly cut off the air supply of the steam turbine so as to stop the operation of the steam turbine; when the steam turbine is in operation, if the axial thrust of the steam turbine is too large due to some reason, the black gold of the thrust pad is melted, and the rotor generates an unallowable axial displacement, so that the moving part and the static part of the steam turbine are rubbed, and serious equipment damage accidents are caused. Therefore, the steam turbine is provided with an axial displacement measuring, alarming and automatic protecting device. The turbine bearing can not work normally due to the fact that the lubricating oil pressure is too low, and severe accidents such as bearing bush damage, dynamic and static part friction and the like can be caused under severe conditions. Therefore, a low oil pressure protection device is arranged in the lubricating system.
The fast combined device 3 of closing in the embodiment of this application combines the single part in the security personnel and control system of the steam turbine together, the fast combined device 3 of closing can realize the normal start and shut down of the steam turbine, it is the integration of important parts such as shut down solenoid valve, shut down unloading valve, shut-off valve, etc., can cause the solenoid valve of shutting down to jam when there is foreign matter in the oil circuit of the combined device 3 of closing fast, cause the oil drainage delay of fast closing; therefore, in the embodiment of the application, a small oil filter is additionally arranged at the outlet of the high-pressure oil inlet pipe of the quick-closing combined device 3.
The quick-closing combined device 3 in the embodiment of the application comprises an upper basic combined body and a lower basic combined body, high-pressure oil enters a shutdown unloading valve after entering the upper basic combined body, and the shutdown unloading valve is in a closed state by overcoming the spring force; when the engine runs normally, oil is not drained when the engine is closed;
when the valve is in a normally open state, the electromagnetic valve is not electrified, high-pressure oil is led into the piston of the shutdown unloading valve through the electromagnetic valve, and the high-pressure oil overcomes the spring force to enable the valve to be in a closed state. When the power supply signal is switched on, the electromagnetic valve acts to cut off the control oil source to the shutdown unloading valve, at the moment, the control oil is switched on with the return oil, the unloading valve is opened, the quick-closing oil is decompressed, and the quick-closing valve is rapidly closed. Meanwhile, the DEH control cabinet receives an ETS stop signal, the regulating oil source is cut off through an OPC stop electromagnetic valve, and the regulating oil is discharged to an oil tank, so that a regulating steam valve is quickly closed. When the valve is in a normally closed state, the electromagnetic valve is electrified, high-pressure oil is led into a piston of the stop unloading valve through the electromagnetic valve, the oil pressure overcomes the spring force to enable the valve to be in a closed state, after a power supply signal is cut off, the electromagnetic valve acts to cut off a control oil source led to the stop unloading valve, at the moment, the control oil is communicated with return oil, the unloading valve is opened, quick-closing oil is decompressed, and the quick-closing valve is closed quickly. Meanwhile, the DEH control cabinet receives an ETS stop signal, an adjusting oil source is cut off through an OPC stop electromagnetic valve, and adjusting oil is discharged to an oil tank, so that an adjusting steam valve is quickly closed; the structure and operation principle of the quick-closing combination device 3 adopted in the present application are already disclosed, and therefore, detailed description thereof is omitted.
The quick-closing control device is a set of a steam turbine security system and a control system, can realize normal starting and stopping of the steam turbine, electric and manual emergency stopping, and opening and closing of an air extraction quick-closing valve of a quick-closing valve machine, and can immediately cut off steam inlet of the steam turbine in an emergency state so as to quickly stop a unit; if foreign matters exist in the quick-closing oil way, the jamming or blockage of important parts can be caused, and the safe and stable operation of the unit is seriously influenced; in addition, when foreign matters exist in an oil path of the quick-closing combined device 3, the shutdown electromagnetic valve may be jammed, and oil leakage delay of quick-closing oil is caused; therefore, in the embodiment of the application, the oil filter 4 is arranged between the oil outlet end of the main oil pump 2 and the oil inlet end of the quick-closing combined device 3, the oil filter 4 has good filtering performance, foreign matters such as impurity particles in a quick-closing oil way can be filtered and blocked, and the function of cleaning the quick-closing oil way is achieved, namely, a set of small oil filter is additionally arranged at the oil inlet of the quick-closing combined device, so that high-pressure oil entering the quick-closing combined device is a cleaned oil way, jamming or blockage of other parts is avoided, and safe and reliable operation of a steam turbine system is guaranteed.
The oil filter 4 in the embodiment of the present application includes a first oil filter 41 and a second oil filter 42 arranged in parallel; a switching valve 43 and an oil balance door 44 are arranged between the first oil filter 41 and the second oil filter 42; that is, in the embodiment of the present invention, the number of the oil filters 4 is 2, 2 oil filters are in an on-off standby state, that is, one oil filter is in an operating state, and the other oil filter is in a standby state, for example, when the filtration performance of the first oil filter 41 cannot meet the system requirement when the pressure difference between the front and the back of the first oil filter 41 reaches an alarm value, the second oil filter 42 in the standby state may be started, and in order to realize the switching of the operating state between the first oil filter 41 and the second oil filter 42, in the embodiment of the present invention, a switching valve 43 and an oil balance door 44 are provided between the first oil filter 41 and the second oil filter 42, and the specific switching process includes: when the pressure difference between the front and the rear of the oil filter in a working state reaches an alarm value, the oil balance door 44 is opened during the operation of the oil filter, and after the oil filter in a standby state is filled with oil and air is exhausted, the oil pressure fluctuation instability caused by gas in an oil path is prevented, at the moment, the pressure difference between the two oil filters reaches a balance state, and the switching of the oil filter can be completed by opening the switching valve 43; and after the pressure difference is balanced, the oil filter needs to be quickly and stably switched to a standby oil filter; wherein the simultaneous discharge of air into the oil filter can be achieved by opening an air release door 45 provided at the upper end and an air release door 46 provided at the lower end of the oil filter.
The system further comprises a condenser 5, the steam turbine body 1 is connected with the condenser 5, steam is a steam turbine working medium, in a steam circulation flow of the steam turbine unit, steam discharged by the steam turbine needs to be condensed into ice, and the condenser 5 is used for condensing the steam discharged by the steam turbine into water in a heat exchange mode. When the condenser normally operates, the condenser can also play the role of a primary vacuum deaerator and can remove gas contained in condensed water, so that the quality of water is improved, and equipment corrosion is prevented.
The steam turbine body 1 comprises a medium-low pressure cylinder 11 and a high pressure cylinder 12; when the steam turbine operates, superheated steam from an external boiler enters the high-pressure cylinder 12 through the control valve, is exhausted after doing work step by step and enters a boiler reheater; the reheat steam control valve enters the intermediate pressure cylinder to continue acting, and then steam is discharged from the intermediate pressure cylinder; the steam discharged from the intermediate pressure cylinder is continuously sent to the low pressure cylinder to do work, and at the moment, the steam discharged from the low pressure cylinder enters the condenser 5.
The application provides a steam turbine system includes, steam turbine body, main oil pump and fast composite set that closes, wherein: an oil filter is arranged between the oil outlet end of the main oil pump and the oil inlet end of the quick-closing combined device; the oil filter has better filtering performance, can filter and block foreign matters such as impurity particles and the like in the quick-closing oil way and play a role in cleaning the quick-closing oil way, namely, a set of small oil filter is additionally arranged at an oil inlet of the quick-closing combined device, so that high-pressure oil entering the quick-closing combined device is the cleaned oil way, thereby avoiding the jamming or blockage of other parts and ensuring the safe and reliable operation of a steam turbine system.
Since the above embodiments are all described by referring to and combining with other embodiments, the same portions are provided between different embodiments, and the same and similar portions between the various embodiments in this specification may be referred to each other. And will not be described in detail herein.
It is noted that, in this specification, relational terms such as "first" and "second," and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a circuit structure, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such circuit structure, article, or apparatus. Without further limitation, the presence of an element identified by the phrase "comprising an … …" does not exclude the presence of other like elements in a circuit structure, article or device comprising the element.
Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.
The above-described embodiments of the present application do not limit the scope of the present application.
Claims (6)
1. A steam turbine system, comprising:
steam turbine body (1), main oil pump (2) and fast composite set (3) of closing, wherein:
an oil filter (4) is arranged between the oil outlet end of the main oil pump (2) and the oil inlet end of the quick-closing combined device (3).
2. Steam turbine system according to claim 1, characterized in that the oil filter (4) comprises a first oil filter (41) and a second oil filter (42) arranged in parallel;
a switching valve (43) and an oil balance door (44) are arranged between the first oil filter (41) and the second oil filter (42).
3. The steam turbine system according to claim 2, characterized in that the first oil filter (41) and the second oil filter (42) are provided at upper and lower ends thereof with an air bleed door (45) and an oil bleed door (46), respectively.
4. The steam turbine system according to claim 2, characterized in that the system further comprises a condenser (5), the turbine body (1) being connected to the condenser (5).
5. The steam turbine system according to claim 1, characterized in that the steam turbine body (1) comprises medium and low pressure cylinders (11) and high pressure cylinders (12).
6. The steam turbine system according to claim 1, characterized in that the system further comprises a turbine front bearing box (6), wherein the main oil pump (2) is arranged inside the turbine front bearing box (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021258671.5U CN212716777U (en) | 2020-06-30 | 2020-06-30 | Steam turbine system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021258671.5U CN212716777U (en) | 2020-06-30 | 2020-06-30 | Steam turbine system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212716777U true CN212716777U (en) | 2021-03-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021258671.5U Active CN212716777U (en) | 2020-06-30 | 2020-06-30 | Steam turbine system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212716777U (en) |
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2020
- 2020-06-30 CN CN202021258671.5U patent/CN212716777U/en active Active
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Effective date of registration: 20220616 Granted publication date: 20210316 |
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