CN109306874B - Vertical low-pressure steam small-differential-pressure small-power steam turbine asynchronous power generation device - Google Patents
Vertical low-pressure steam small-differential-pressure small-power steam turbine asynchronous power generation device Download PDFInfo
- Publication number
- CN109306874B CN109306874B CN201810753196.XA CN201810753196A CN109306874B CN 109306874 B CN109306874 B CN 109306874B CN 201810753196 A CN201810753196 A CN 201810753196A CN 109306874 B CN109306874 B CN 109306874B
- Authority
- CN
- China
- Prior art keywords
- steam turbine
- steam
- pressure
- bearing
- cylinder
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D17/00—Regulating or controlling by varying flow
- F01D17/10—Final actuators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D21/00—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for
- F01D21/003—Arrangements for testing or measuring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/08—Cooling; Heating; Heat-insulation
- F01D25/12—Cooling
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/08—Cooling; Heating; Heat-insulation
- F01D25/12—Cooling
- F01D25/125—Cooling of bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/16—Arrangement of bearings; Supporting or mounting bearings in casings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/18—Lubricating arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Turbines (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The invention relates to a vertical low-pressure steam small-differential-pressure small-power steam turbine asynchronous power generation device which comprises a steam turbine, a generator and a support, wherein the support is arranged on the cement foundation ground, the steam turbine and the generator are respectively arranged on the support, the steam turbine is positioned above the generator, the steam turbine adopts a vertical back pressure steam turbine structure, an output end which can be driven by steam entering the steam turbine to rotate extends downwards, the output end of the steam turbine is connected with the input end of the generator, and the output end of the generator outputs electric power. The invention utilizes the residual pressure of the steam to generate electricity, and the exhausted steam of the steam turbine is used for the subsequent process, thereby realizing reasonable gradient utilization of the steam and solving the problems of secondary pressure difference energy loss and lower steam energy utilization rate in the prior art.
Description
Technical Field
The invention relates to a vertical low-pressure steam small-differential-pressure small-power steam turbine asynchronous power generation device, and belongs to the field of low-pressure steam gradient utilization.
Background
The steam in the production process can be used after being subjected to temperature reduction and pressure reduction, and a temperature reduction and pressure reduction device is usually adopted to take measures.
For the steam conversion, a steam turbine synchronous power generation technology is also applied, but for the resource of low pressure steam with small differential pressure and small flow, a temperature reduction and pressure reduction device is still used, for example, a typical steam gas source generally uses a steam flow of 12t/h, the steam pressure of superheated steam is 0.75-0.9 MPa (g), the temperature is 260-290 ℃, and after passing through the temperature reduction and pressure reduction device, the pressure is reduced and the temperature is reduced to 0.6 +/-0.03 MPa (g) and 170 +/-5 ℃.
Disclosure of Invention
The invention aims to solve the technical problem of providing a vertical low-pressure steam small-differential-pressure small-power steam turbine asynchronous power generation device, which utilizes the residual pressure of steam to generate power, uses the exhausted steam of a steam turbine for subsequent processes, realizes reasonable steam gradient utilization, and solves the problems of secondary differential pressure energy loss and low steam energy utilization rate in the prior art.
The technical scheme for solving the technical problems is as follows: the utility model provides a vertical low pressure steam little differential pressure miniwatt turbine asynchronous power generation device, includes steam turbine, generator and support, the support mounting is subaerial on the cement basis, steam turbine and generator are installed respectively on the support, just the steam turbine is located the top of generator, the steam turbine adopts vertical back pressure steam turbine structure, and its downwardly extending has the steam that can be got into the steam turbine to drive pivoted output, the output of steam turbine with the input of generator is connected, the output electric power of generator.
On the basis of the technical scheme, the invention can be further improved as follows.
Further, the steam turbine comprises a cylinder, a steam turbine rotor, a steam turbine bearing and a steam turbine gland seal, wherein an air inlet and an air outlet are respectively formed in two transverse ends of the cylinder, the steam turbine gland seal is arranged at the lower end of the cylinder, the steam turbine rotor is arranged in the cylinder and downwards penetrates through the steam turbine gland seal to form an output end of the steam turbine, and the steam turbine bearing is sleeved outside a part, downwards penetrating through the steam turbine gland seal, of the steam turbine rotor.
Further, the cylinder comprises cylinder block and cylinder cap, the horizontal ascending both ends of cylinder block are equipped with air inlet and gas vent respectively, cylinder block lower extreme middle part is equipped with the opening to be equipped with at the opening part the steam turbine steam seal, the cylinder block upper end is uncovered to there is through flange sealing connection the cylinder cap.
Further, the steam turbine rotor comprises a rotating shaft and an impeller, the impeller is horizontally arranged in the cylinder, one end of the rotating shaft is fixedly connected with the middle part of the impeller, the other end of the rotating shaft downwards penetrates through the steam turbine gland seal to form the output end of the steam turbine, and is connected with the input end of the generator through a gear coupling, the turbine bearing is sleeved outside the other end of the rotating shaft, the outer edge of the impeller is provided with an impeller blade and a steering guide vane ring, the bottom wall of the cylinder is provided with a nozzle group communicated with the air inlet, the air injection direction of the nozzle group is upward, the impeller blade is positioned above the turning guide vane ring, the turning guide vane ring is positioned above the nozzle group, and one end of the rotating shaft, the impeller blades, the turning guide vane ring and the nozzle group form a through flow part of the steam turbine.
Further, the steam turbine bearing comprises a front bearing close to the cylinder and a rear bearing close to the generator, the rotating shaft is rotatably sleeved in the front bearing and the rear bearing and is axially fixed, the rear bearing is fixed on the support, a reinforcing rib plate is arranged between the front bearing and the rear bearing, a butt plate is arranged between the front bearing and the cylinder, an adjusting gasket used for adjusting the gap of the through-flow part is further arranged at the upper end of the front bearing, and the upper end and the lower end of the butt plate are respectively abutted to the lower end of the cylinder and the adjusting gasket.
Furthermore, the front bearing adopts a double-row angular contact radial ball bearing, adopts an SKF high-temperature and high-performance lubricating grease LGHP2 lubricating mode, and adopts a timing automatic grease filling device; the rear bearing adopts a deep groove ball bearing, adopts a grease lubrication mode and adopts a manual grease filling mode; the front bearing and the rear bearing are both provided with cooling chambers, and the inlets and outlets of the cooling chambers are connected with cooling liquid from a temperature reduction water system.
Furthermore, the rotating shaft is provided with a rotating speed signaling wheel between the front bearing and the rear bearing, the rotating speed signaling wheel transmits a rotating speed signal to the control system through a rotating speed sensor, and the control system is electrically connected with the air inlet valve positioned at the air inlet to control the opening degree of the air inlet.
Further, the front bearing and the rear bearing are both provided with vibration detection sensors, and the vibration detection sensors transmit vibration signals to the control system.
Further, the front bearing and the rear bearing are both provided with platinum resistance temperature sensors, and the platinum resistance temperature sensors transmit temperature signals to a control system.
Furthermore, the steam seal of the steam turbine adopts mechanical seal and is provided with a cooling chamber, and the outlet and the inlet of the cooling chamber are connected with cooling liquid from a desuperheating water system.
The invention has the beneficial effects that: compared with the prior art, the vertical low-pressure steam small-differential-pressure small-power steam turbine asynchronous power generation device is suitable for low-pressure, small-differential-pressure and small-flow steam conversion, is different from a traditional steam turbine or a temperature and pressure reducer, and has the following advantages:
1. the vertical low-pressure steam small-differential-pressure low-power steam turbine asynchronous power generation device can replace the traditional temperature and pressure reduction device or improve the existing pressure reduction device, meet the process steam quality requirement, and simultaneously can generate power, feed back to a power grid and save energy; the economic benefit is considerable, according to the steam inlet pressure of 0.8Mpa, the exhaust pressure of 0.6Mpa and the differential pressure of 0.2Mpa, a single unit operates according to the designed working condition of the steam inlet amount of 14t/h, and the annual power generation can reach 100 ten thousand kW/h.
2. The steam turbine adopts a vertical back pressure steam turbine structure with advanced technology; the steam turbine and the generator are arranged on a bracket; the support is installed on the cement foundation ground. The structure is simple, compact and thick, and the deformation is not easy under the action of external force; the installation is simple; the occupied area of the equipment is saved.
3. The method does not need to arrange a gasoline engine lubricating oil station and a cooling water system of the gasoline engine oil station, has simple matching process and saves investment.
4. The turbine is connected with the generator through the gear coupling, axial displacement caused by thermal expansion of the turbine or other factors can be absorbed in the operation process, and meanwhile, micro angular and radial deviation of two axes can be compensated, the stability of the operation of the rotor is improved, the bearing capacity of the front bearing and the rear bearing is reduced, the abrasion of the mechanical seal of the turbine is reduced, and the service lives of the front bearing, the rear bearing and the mechanical seal are prolonged.
5. The front bearing of the steam turbine adopts a double-row angular contact radial ball bearing, the rear bearing adopts a deep groove ball bearing, the rotor is allowed to generate axial displacement, the vibration is reduced, the operation stability is improved, in addition, the configuration of the front bearing and the rear bearing also improves the operation stability of the rotor, the abrasion of the mechanical seal of the steam turbine is reduced, and the service life of the mechanical seal is prolonged.
6. The high-performance lubricating grease LGHP2 adopted by the front bearing of the steam turbine adopts a timing automatic grease filling device, so that the lubrication of the bearing can be ensured, and the service life of the bearing is prolonged.
7. The steam seal of the steam turbine adopts mechanical seal, can realize no leakage or micro leakage of steam, and is provided with a steam seal cooling chamber, thereby improving the operation stability and prolonging the service life of the steam seal cooling chamber.
8. The front bearing and the rear bearing of the steam turbine are both provided with a steam turbine bearing cooling chamber and are connected with a cooling liquid temperature reduction water system to form a temperature reduction cooling system; the running temperature of the bearing is reduced, and the service life of the bearing is prolonged.
9. The steam turbine body is provided with a plurality of speed sensors, vibration detection sensors and platinum resistance temperature sensors respectively, and is used for monitoring and protecting the speed, vibration and temperature operation of the unit.
Drawings
FIG. 1 is a schematic diagram of an overall front view structure of a vertical low-pressure steam small-differential-pressure small-power steam turbine asynchronous power generation device according to the invention;
FIG. 2 is a principal cross-sectional view of the steam turbine of the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
1. the device comprises a steam turbine, 2, a support, 3, a generator, 4, a front bearing, 5, a rear bearing, 6, a gear coupling, 7, a steam seal of the steam turbine, 8, a cylinder body, 9, a cylinder cover, 10, a frame base, 11, an air inlet, 12, an exhaust port, 13, a rotating shaft, 14, an impeller, 15, impeller blades, 16, a nozzle group, 17, a reinforcing rib plate, 18 and a speed measuring coded disc of the steam turbine.
Detailed Description
The principles and features of this invention are described below in conjunction with examples which are set forth to illustrate, but are not to be construed to limit the scope of the invention.
As shown in fig. 1, the invention relates to a vertical low-pressure steam small-differential-pressure small-power turbine asynchronous power generation device, which comprises a turbine 1, a generator 3 and a support 2, wherein the support 2 is installed on a cement-based ground, the turbine 1 and the generator 3 are respectively installed on the support 2, the turbine 1 is positioned above the generator 3, the turbine 1 adopts a vertical back-pressure turbine structure, an output end which can be driven to rotate by steam entering the turbine 1 extends downwards, the output end of the turbine is connected with the input end of the generator 3, and the output end of the generator 3 outputs electric power.
The support 2 is a public vertical support which is mounted on the cement foundation ground through a frame base 10. Specifically, a platform is arranged at the upper end of the support 2, the steam turbine 1 is installed on the platform at the upper end of the support 2, the generator 3 is installed inside the support 2, and the bottom of the generator can be fixed on the frame base 10. During specific installation, the welded frame base 10 is horizontally placed on the cement foundation ground of the heating power station, the generator 3 is connected to the support 2, the assembled steam turbine 1 is fixedly installed on the support 2, and finally the support is fixed to the frame base 10 integrally.
The generator can adopt an asynchronous generator, the steam turbine 1 can adopt a back pressure steam turbine, the back pressure steam turbine is designed according to the steam inlet pressure of 0.8MPa and the differential pressure of 0.2MPa, the unit is ensured to operate under the designed working condition, the single unit is designed according to the steam inlet amount of 14t/h, and the power of the steam turbine is less than or equal to 120 kW. The vertical low-pressure steam small-differential-pressure small-power steam turbine asynchronous power generation device does not need to be provided with a steam turbine lubricating oil station system and a steam turbine oil station cooling water system.
On the basic layer of the above technical solution, specifically, as shown in fig. 2, the steam turbine 1 includes a cylinder, a turbine rotor, a turbine bearing and a turbine gland seal 7, an air inlet 11 and an air outlet 12 are respectively disposed at two lateral ends of the cylinder, the turbine gland seal 7 is disposed at a lower end of the cylinder, the turbine rotor is disposed in the cylinder and downwardly penetrates through the turbine gland seal 7 to form an output end of the steam turbine, and the turbine bearing is sleeved on a portion of the turbine rotor which downwardly penetrates through the turbine gland seal 7.
The cylinder comprises cylinder block 8 and cylinder cap 9, 8 horizontal ascending both ends of cylinder block are equipped with air inlet 11 and gas vent 12 respectively, 8 lower extreme middle parts of cylinder block are equipped with the opening to be equipped with at the opening part steam turbine gland seal 7, 8 upper ends of cylinder block are uncovered to there is through flange sealing connection cylinder cap 9. The cylinder block 8 is the main casing structure of the steam turbine 1, and one end of the cylinder block is in a semi-closed design (sealed by a cylinder cover 9), and the other end of the cylinder block adopts a mechanical seal (a steam seal 7) as a shaft seal design. The cylinder block 8 and the cylinder cover 9 are made of ZG20 cast steel, the cylinder block and the cylinder cover are connected through flanges, and 1mm high-pressure paperboards are additionally arranged on sealing surfaces during assembly.
The steam turbine rotor comprises a rotating shaft 13 and an impeller 14, the impeller 14 is horizontally arranged in the cylinder, one end of the rotating shaft 13 is fixedly connected with the middle of the impeller 14, the other end of the rotating shaft 13 downwards penetrates through a steam turbine gland seal 7 to form an output end of the steam turbine 1 and is connected with an input end of the generator 3 through a tooth-type coupling 6, a steam turbine bearing is sleeved outside the other end of the rotating shaft 13, an impeller blade 15 and a steering guide vane ring are arranged on the outer edge of the impeller 14, a nozzle group 16 communicated with the air inlet 11 is arranged on the bottom wall of the cylinder, the air injection direction of the nozzle group 16 is upward, the impeller blade 15 is positioned above the steering guide vane ring, the steering guide vane ring is positioned above the nozzle group 16, one end of the rotating shaft 13, the impeller 14, the impeller blade 15, The turning vane ring and the nozzle block 16 form the flow path of the steam turbine.
The nozzle group 16 in the invention is composed of a plurality of nozzles, each nozzle is a steam channel (similar to a hole) with a specific section shape, steam enters the cylinder from the air inlet chamber through the nozzle and expands, the pressure and the temperature of the steam are reduced, the flow speed of the steam is increased, high-speed airflow is formed, and the steam is sprayed out according to a set direction to push the movable impeller blades 15 to do work, so that the whole rotor is pushed to rotate, and power generation is performed. Specifically, the shape and structure of the nozzle and the principle of pushing the impeller blades 15 and the whole rotor to rotate are all in the prior art, and can be realized by the structure of a steam turbine which is common in the field; in addition, the structural arrangement of the nozzle group and the driving of the rotor can also be a scheme of two-stage air inlet: an upper partition plate and a lower partition plate are arranged in the cylinder, the nozzle group 16 is divided into two stages, the first-stage nozzle group comprises a plurality of nozzles which are annularly arranged on the lower partition plate but are not uniformly distributed on the whole circumference, so that the second-stage nozzle group is in the stress design of a machine set and keeps stable operation, and the second-stage nozzle group also comprises a plurality of nozzles which are arranged on the upper partition plate; the impeller blades 15 are divided into two groups, an upper blade group corresponds to the second-stage nozzle group and is arranged above the second-stage nozzle group, and a lower blade group corresponds to the first-stage nozzle group and is arranged between the first-stage nozzle group and the second-stage nozzle group (a steering guide blade ring can be arranged between the first-stage nozzle group and the lower blade group, and has a guiding function). The nozzle block 16 is hoisted together with the impeller 14 during disassembly and assembly, and after the nozzle block is in place, the upper and lower partition plates are fixed through bolts. Steam enters a nozzle chamber (not marked in the figure) through an air inlet 11, is sprayed in a certain direction through a first-stage nozzle group to push a lower blade group to do work, then enters a second-stage nozzle group, is sprayed to an upper blade group to do work, the upper and lower second-stage blade groups act together to push an impeller 14, so that a rotor rotates, low-pressure steam after the work is discharged through an exhaust port 12, enters a temperature reduction regulating valve, and is supplied to other processes for use after the temperature is reduced.
The impeller 14 is fixed to the rotating shaft 13 by a hydraulic process. The impeller blades 15 can be designed as impulse type blades with certain reaction degree and are all non-frequency-modulation blades; the straight blade root, the molded line part and the shroud are milled by a whole material; the form of the blade root is selected from a T-shaped blade root and an externally-wrapped T-shaped blade root according to the strength requirement.
The rotating shaft 13 of the steam turbine 1 is connected with the input end of the generator 3 through a gear coupling, so that the axial displacement caused by thermal expansion of the steam turbine 1 or other factors can be absorbed in the operation process, and meanwhile, the micro angular and radial deviation of two axes can be compensated.
During installation, the two parts of the gear coupling 6 can be respectively installed on the rotating shaft 13 of the steam turbine 1 and the input end of the generator 3, the assembled steam turbine 1 is fixedly installed on the support 2, the position of the generator 3 is adjusted up and down, the two parts of the gear coupling 6 are enabled to be in corresponding positions, and finally the generator 3 is fixed on the support 2.
The steam turbine bearing comprises a front bearing 4 close to the cylinder and a rear bearing 5 close to the generator, the rotating shaft 13 is rotatably sleeved in the front bearing 4 and the rear bearing 5 and is axially fixed, the rear bearing 5 is fixed on the support 2, reinforcing rib plates 17 are arranged between the front bearing 4 and the rear bearing 5, a butt plate is arranged between the front bearing 4 and the cylinder, an adjusting gasket for adjusting the gap of the through-flow part is further arranged at the upper end of the front bearing 4, and the upper end and the lower end of the butt plate are respectively abutted to the lower end of the cylinder and the adjusting gasket.
The axial displacement positioning of the rotating shaft 13 is realized by fixing the front bearing 4 on a corresponding bearing seat to form a relative dead point; the entire steam turbine 1 can be mounted and fixed on the support 2 by means of the bearing block of the rear bearing 5. And a reinforcing rib plate 17 is arranged between the front bearing 4 and the bearing seat of the rear bearing 5 and used for fixing the relative position. The adjustment of the clearance of the through-flow part is achieved by the tolerance requirement of machining and the thickness of an adjusting gasket arranged on a front bearing 4 of the steam turbine 1, for example, when the clearance of the through-flow part needs to be increased, the height of the air cylinder relative to the whole rotor is required to be increased, after a rotating shaft 13 of the rotor is axially fixed by the front bearing 4, the relative distance between the front bearing 4 and the lower end of the air cylinder is only required to be increased, since an abutting plate is arranged between the front bearing 4 and the lower end of the air cylinder to maintain a macroscopic distance, at the moment, only the adjusting gasket with larger thickness needs to be replaced to be cushioned below the abutting plate, and the increase of the clearance of the through-flow part can be realized, and vice versa. The rotor of the steam turbine 1 should completely remove residual internal stress, and the dynamic balance test before leaving the factory is qualified. A water discharge hole with a screw plug is also arranged at the rear bearing 5.
The front bearing 4 adopts a double-row angular contact radial ball bearing, adopts an SKF high-temperature and high-performance lubricating grease LGHP2 lubricating mode, and adopts a timing automatic grease filling device; the rear bearing 5 adopts a deep groove ball bearing, adopts a grease lubrication mode and adopts a manual grease filling mode, so that the axial displacement of the rotor can be allowed; the front bearing 4 and the rear bearing 5 are both provided with cooling chambers, and the inlets and outlets of the cooling chambers are connected with cooling liquid from a temperature reduction water system.
The rotating shaft 13 is provided with a rotating speed signaling wheel between the front bearing 4 and the rear bearing 5, the rotating speed signaling wheel transmits a rotating speed signal to a control system through a rotating speed sensor, and the control system is electrically connected with an air inlet valve positioned at the air inlet 11 to control the opening degree of the air inlet. The rotating speed signaling wheel can be a turbine speed measuring coded disc 18 sleeved on the rotating shaft 13, the rotating speed of the rotating shaft 13 is measured through four rotating speed sensors, and a speed measuring hole can be arranged at a position corresponding to the rotating speed sensors. The rotation speed signaling wheel is vertically installed with the rotating shaft 13, and is drawn on the rotating shaft 13 in the figure for describing the number of teeth, and when in use, the rotation speed signaling wheel should rotate 90 degrees to be horizontal and then be sleeved on the rotating shaft 13. The control system may be a PLC.
The front bearing 4 and the rear bearing 5 are both provided with vibration detection sensors, and the vibration detection sensors transmit vibration signals to the control system. Each bearing can be provided with a vibration detection sensor and is particularly arranged on a bearing seat of the corresponding bearing.
The front bearing 4 and the rear bearing 5 are both provided with platinum resistance temperature sensors, and the platinum resistance temperature sensors transmit temperature signals to a control system. Two platinum resistance temperature sensors may be provided for each bearing, and are specifically disposed within the corresponding bearing chambers.
The steam turbine gland seal 7 adopts a mechanical sealing technology, a cooling chamber is arranged on the outer shell of the steam turbine gland seal, and the outlet and the inlet of the steam turbine gland seal are connected with cooling liquid from a desuperheating water system. A small amount of cooling water leaking into the cylinder is directly introduced into a pipeline at the exhaust port 12 by a matched suction device; and a matched liquid flow monitoring system is arranged for protecting the cooling liquid of the steam seal 7 of the steam turbine.
The working principle and the process of the invention are as follows: the low-pressure steam enters the cylinder through the air inlet 11, the through-flow part of the steam turbine 1 is formed by the nozzle group 16, the steering guide vane ring, the impeller blades 15 and the impeller 14, the rotating shaft 13 is pushed to rotate, the generator 3 is driven to rotate to generate electricity, and the steam after acting enters a secondary steam pipe network through the air outlet 12 for use in subsequent processes.
The speed signal detected by the speed sensor enters a matched speed control and protection device (namely the control system) to adjust and control a matched air inlet valve (positioned at an air inlet) so that the generator 3 reaches a set stable rotating speed, thereby ensuring the voltage output of the generator 3 to be stable. The air inlet valve comprises an air inlet adjusting valve (butterfly valve) and an air inlet switch valve (gate valve), the air inlet switch valve is opened firstly during operation, then the air inlet adjusting valve is controlled according to a speed signal, the opening degree is adjusted, the air inflow of steam is controlled, the stability of the rotating speed of the rotating shaft 13 is guaranteed, and electric power is stably output.
And the vibrations detection sensor is installed on the shell body of steam turbine 1, and the correspondence can be located the bearing frame of front and back bearing, and it belongs to acceleration measurement sensor, and when steam turbine 1 vibrations exceeded 65um/s, control system output control signal to the control solenoid valve of governing valve (butterfly valve) and the switch valve that admits air, the governing valve and the switch valve that admits air of turn-off fast, and the steam turbine shuts down, separates with the electric wire netting simultaneously. The platinum resistance temperature sensors are arranged in front and rear bearing chambers of the steam turbine 1, when the temperature is too high (over 100 ℃), the control system outputs control signals to control electromagnetic valves of an air inlet adjusting valve (butterfly valve) and an air inlet switch valve (gate valve), the air inlet adjusting valve and the air inlet switch valve are quickly turned off, the steam turbine is shut down, and the steam turbine is disconnected with a power grid. Therefore, the vibration signal and the temperature signal only act on the protection alarm and trip, and do not act on the regulation of the intake valve.
The specific structure and connection relationship of the components not referred to in the above description of the present invention belong to the prior art, such as the internal specific structure of the generator 3, the turbine gland 7, the front bearing 4, the rear bearing 5 and the like, and the connection with other components.
The main technical parameters of the invention are as follows:
rated power of steam turbine 1: 120 kW;
rated power of the generator 3: 132 kW;
rotating speed of the generator 3: 3019 r/min;
tripping rotating speed: 3050 r/min;
the steam inlet pressure: 0.8-0.9 MPa (a);
the steam inlet temperature: 260-290 ℃;
back pressure: 0.6 plus or minus 0.03MPa (a);
dynamic load of the steam turbine 1: 0.6 kN;
rotor mass (kg): 300, respectively;
mass of monomer (steam turbine 1 plus generator 3) (kg): 3000A;
maximum service mass (kg): 4000;
external dimension (mm): 1500x1300x 2600;
turning; the rotor rotates clockwise as viewed from the turbine.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. The vertical low-pressure steam small-differential-pressure low-power steam turbine asynchronous power generation device is characterized by comprising a steam turbine (1), a generator (3) and a support (2), wherein the support (2) is installed on a cement foundation ground, the steam turbine (1) and the generator (3) are respectively installed on the support (2), the steam turbine (1) is located above the generator (3), the steam turbine (1) adopts a vertical back pressure steam turbine structure, an output end which can be driven to rotate by steam entering the steam turbine (1) extends downwards, the output end of the steam turbine is connected with the input end of the generator (3), and the output end of the generator (3) outputs electric power; the steam turbine (1) comprises a cylinder, a steam turbine rotor, a steam turbine bearing and a steam turbine gland seal (7), wherein an air inlet (11) and an air outlet (12) are respectively arranged at two transverse ends of the cylinder, the steam turbine gland seal (7) is arranged at the lower end of the cylinder, the steam turbine rotor is arranged in the cylinder and downwards penetrates through the steam turbine gland seal (7) to form an output end of the steam turbine, and the steam turbine bearing is sleeved outside a part of the steam turbine rotor downwards penetrating through the steam turbine gland seal (7); the steam turbine rotor comprises a rotating shaft (13) and an impeller (14), the impeller (14) is horizontally arranged in the cylinder, one end of the rotating shaft (13) is fixedly connected with the middle of the impeller (14), the other end of the rotating shaft (13) downwards penetrates through a steam turbine gland seal (7) to form an output end of the steam turbine (1) and is connected with an input end of the generator (3) through a tooth type coupler (6), a steam turbine bearing is sleeved outside the other end of the rotating shaft (13), an impeller blade (15) and a turning guide blade ring are arranged on the outer edge of the impeller (14), a nozzle group (16) communicated with the air inlet (11) is arranged on the bottom wall of the cylinder, the air injection direction of the nozzle group (16) is upward, the impeller blade (15) is positioned above the turning guide blade ring, the turning guide blade ring is positioned above the nozzle group (16), one end of the rotating shaft (13), the impeller (14), the impeller blades (15), the turning guide vane ring and the nozzle group (16) form a through flow part of the steam turbine; an upper partition plate and a lower partition plate are arranged in the cylinder, the nozzle group (16) is divided into two stages, the first-stage nozzle group comprises a plurality of nozzles which are annularly arranged on the lower partition plate but are not uniformly distributed on the whole circumference, and the second-stage nozzle group also comprises a plurality of nozzles which are arranged on the upper partition plate; the impeller blades (15) are divided into an upper group and a lower group, the upper blade group corresponds to the second-stage nozzle group and is arranged above the second-stage nozzle group, the lower blade group corresponds to the first-stage nozzle group and is arranged between the first-stage nozzle group and the second-stage nozzle group, and the steering guide blade ring is arranged between the first-stage nozzle group and the lower blade group; the steam turbine bearing comprises a front bearing (4) close to the cylinder and a rear bearing (5) close to the generator, the rotating shaft (13) is rotatably sleeved in the front bearing (4) and the rear bearing (5) and is axially fixed, the rear bearing (5) is fixed on the support (2), reinforcing rib plates (17) are arranged between the front bearing (4) and the rear bearing (5), a butt plate is arranged between the front bearing (4) and the cylinder, an adjusting gasket for adjusting the gap of the through-flow part is further arranged at the upper end of the front bearing (4), and the upper end and the lower end of the butt plate are respectively abutted to the lower end of the cylinder and the adjusting gasket.
2. The vertical low-pressure steam small-differential-pressure small-power turbine asynchronous power generation device is characterized in that the cylinder is composed of a cylinder block (8) and a cylinder cover (9), an air inlet (11) and an air outlet (12) are respectively arranged at two ends of the cylinder block (8) in the transverse direction, an opening is formed in the middle of the lower end of the cylinder block (8), the turbine steam seal (7) is arranged at the opening, the upper end of the cylinder block (8) is open, and the cylinder cover (9) is connected with the cylinder cover in a sealing mode through a flange.
3. The vertical low-pressure steam small-differential-pressure small-power turbine asynchronous power generation device as claimed in claim 1, characterized in that the front bearing (4) adopts a double-row angular contact radial ball bearing, adopts an SKF high-temperature and high-performance lubricating grease LGHP2 lubricating mode, and adopts a timing automatic grease filling device; the rear bearing (5) adopts a deep groove ball bearing, adopts a grease lubrication mode and adopts a manual grease filling mode; the front bearing (4) and the rear bearing (5) are both provided with cooling chambers, and the inlets and outlets of the cooling chambers are connected with cooling liquid from a temperature reduction water system.
4. The vertical low-pressure steam small-differential-pressure small-power steam turbine asynchronous power generation device as claimed in claim 1, wherein a rotating speed signaling wheel is mounted on the rotating shaft (13) between the front bearing (4) and the rear bearing (5), the rotating speed signaling wheel transmits a rotating speed signal to a control system through a rotating speed sensor, and the control system is electrically connected with an air inlet valve at the air inlet (11) to control the opening degree of the air inlet valve.
5. The vertical low-pressure steam small-differential-pressure small-power steam turbine asynchronous power generation device as claimed in claim 4, wherein the front bearing (4) and the rear bearing (5) are both provided with vibration detection sensors, and the vibration detection sensors transmit vibration signals to a control system.
6. The vertical low-pressure steam small-differential-pressure small-power steam turbine asynchronous power generation device as claimed in claim 4, wherein the front bearing (4) and the rear bearing (5) are both provided with platinum resistance temperature sensors, and the platinum resistance temperature sensors transmit temperature signals to a control system.
7. The vertical low-pressure steam small-differential-pressure small-power turbine asynchronous power generation device is characterized in that a turbine gland seal (7) adopts mechanical seal and is provided with a cooling chamber, and the outlet and the inlet of the turbine gland seal are connected with cooling liquid from a temperature reduction water system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810753196.XA CN109306874B (en) | 2018-07-10 | 2018-07-10 | Vertical low-pressure steam small-differential-pressure small-power steam turbine asynchronous power generation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810753196.XA CN109306874B (en) | 2018-07-10 | 2018-07-10 | Vertical low-pressure steam small-differential-pressure small-power steam turbine asynchronous power generation device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109306874A CN109306874A (en) | 2019-02-05 |
| CN109306874B true CN109306874B (en) | 2021-09-03 |
Family
ID=65226007
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810753196.XA Active CN109306874B (en) | 2018-07-10 | 2018-07-10 | Vertical low-pressure steam small-differential-pressure small-power steam turbine asynchronous power generation device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109306874B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110425010A (en) * | 2019-07-19 | 2019-11-08 | 杭州中能汽轮动力有限公司 | Vertical cantilever formula steam turbine |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6046509A (en) * | 1998-08-27 | 2000-04-04 | Tuthill Corporation | Steam turbine-driven electric generator |
| CN201110196Y (en) * | 2007-09-19 | 2008-09-03 | 山东青能动力股份有限公司 | Back pressure steam turbine |
| CN205445698U (en) * | 2015-12-28 | 2016-08-10 | 世纪华扬环境工程有限公司 | Back pressure turbine asynchronous generator group suitable for heat supply network initial station improvement project |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101328813A (en) * | 2008-07-22 | 2008-12-24 | 刘昂峰 | Vertical high-efficiency turbine wheel engine |
| CN104018891B (en) * | 2014-05-23 | 2016-03-09 | 武汉船用机械有限责任公司 | A kind of steam turbine |
| CN205805619U (en) * | 2016-06-30 | 2016-12-14 | 淄博迈特汽轮机有限公司 | A kind of back pressure turbine of slow-speed of revolution low voltage difference |
-
2018
- 2018-07-10 CN CN201810753196.XA patent/CN109306874B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6046509A (en) * | 1998-08-27 | 2000-04-04 | Tuthill Corporation | Steam turbine-driven electric generator |
| CN201110196Y (en) * | 2007-09-19 | 2008-09-03 | 山东青能动力股份有限公司 | Back pressure steam turbine |
| CN205445698U (en) * | 2015-12-28 | 2016-08-10 | 世纪华扬环境工程有限公司 | Back pressure turbine asynchronous generator group suitable for heat supply network initial station improvement project |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109306874A (en) | 2019-02-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106437857B (en) | The equipment of screw path type steam turbine and application screw path type steam turbine | |
| CN211314285U (en) | High-efficient steam turbine of biomass power generation | |
| CN109306874B (en) | Vertical low-pressure steam small-differential-pressure small-power steam turbine asynchronous power generation device | |
| CN200989427Y (en) | Belt conveyor flexible starting speed regulator | |
| CN110821712A (en) | Low temperature turbine pump high temperature gas outlet end connection structure | |
| CN103206335B (en) | A kind of horizontal mixed flow turbine-generator units | |
| CN210799052U (en) | Steam turbine for cracking gas device and cracking gas system | |
| CN112302740A (en) | BEST small steam turbine of novel million units | |
| CN205779041U (en) | A kind of steam turbine and heating system | |
| CN108019243A (en) | A kind of integral bearing A seating turbine | |
| CN101545491A (en) | Boiler water-feeding pump | |
| CN202818007U (en) | High-temperature rotor water circulating cooling device | |
| CN214384184U (en) | Center aeration valve of water turbine reset by self weight | |
| CN208669358U (en) | Compact little volume flow high pressure ratio mixed-flow industrial turbine | |
| CN111911416A (en) | Two-loop emergency water replenishing diesel engine pump set and system for nuclear power plant | |
| CN210949153U (en) | Small-flow ultrahigh-pressure boiler feed pump | |
| CN114198166A (en) | 3 MW-grade full-circumference air inlet axial flow impulse type supercritical carbon dioxide turbine | |
| CN210113386U (en) | Split type power turbine structure containing static pressure seal | |
| CN112196811A (en) | Novel runner blade governing system | |
| CN202900332U (en) | Turbine air cylinder casting assembly | |
| CN212508860U (en) | Two-loop emergency water replenishing diesel engine pump set and system for nuclear power plant | |
| CN107313889B (en) | Vertical self-contained conduit type hydroelectric generating group | |
| WO2024108958A1 (en) | 60mw reaction intermediate-intake single-reheat air turbine and operation method | |
| CN205383033U (en) | Cylindrical valve axial flow turbine | |
| CN215486640U (en) | Service frequency electric water feed pump mechanical seal life-prolonging structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |