阅读说明：本技术 一种新型给水泵调速装置 (Novel feed pump speed regulating device ) 是由 钟铭 付小东 石伟栋 夏文武 郭通 苑红军 付利民 周桓 蒋思磊 申杰 丁炜 于 2021-08-27 设计创作，主要内容包括：本发明提供一种新型给水泵调速装置,包括,给水泵组件,所述给水泵组件包括给水泵以及小汽轮机,所述小汽轮机控制给水泵的转速；以及,固定台,所述给水泵组件设置在所述固定台上表面。本发明为小汽轮机配置了一台高速电机,该高速电机在变流器的作用下也可以作为发电机使用,在最初运行时,当没有蒸汽来源(其它机组辅汽不能满足本机组启动时,发电机当电动机用),当本机组运行稳定后,高速电机在变流器的作用下,作为发电机使用,可以使得进汽主调门控制转速产生的节流损失转换为电能供厂用电使用。(The invention provides a novel feed pump speed regulating device, which comprises a feed pump assembly, wherein the feed pump assembly comprises a feed pump and a small steam turbine, and the small steam turbine controls the rotating speed of the feed pump; and the water supply pump assembly is arranged on the upper surface of the fixed table. The invention provides a high-speed motor for a small steam turbine, wherein the high-speed motor can also be used as a generator under the action of a converter, when the high-speed motor is in initial operation and no steam source exists (when auxiliary steam of other units cannot meet the starting requirement of the unit, the generator is used as a motor), and when the unit is stable in operation, the high-speed motor is used as the generator under the action of the converter, so that the throttling loss generated by the control of the rotating speed of a main steam inlet governor can be converted into electric energy for service use.)

1. The utility model provides a novel feed pump speed adjusting device which characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,

a small steam turbine (102), wherein the small steam turbine (102) is used for controlling the rotating speed of the water feeding pump (101);

a starting assembly (200), wherein the starting assembly (200) is connected with the small steam turbine (102) through a connecting assembly (300); and the number of the first and second groups,

coupling assembling (300), coupling assembling (300) set up in small steam turbine (102) one end, coupling assembling (300) include end cover mechanism (301), drive mechanism (302) and disconnect-structure (303), the inside cavity that is equipped with of end cover mechanism (301), drive mechanism (302) and disconnect-structure (303) are located in the cavity.

2. A novel feed pump speed regulating device according to claim 1, characterized in that the starting assembly (200) comprises a high-speed motor (201), a converter (202) and a first rotating shaft (203), the converter (202) is connected with the high-speed motor (201), and an output shaft of the high-speed motor (201) is fixedly connected with the first rotating shaft (203).

3. A novel feed pump speed regulating device according to claim 1 or 2, characterized in that a second rotating shaft (103) is arranged on one side of the small steam turbine (102) close to the starting assembly (200), and two ends of the connecting assembly (300) are respectively connected with the first rotating shaft (203) and the second rotating shaft (103).

4. A novel feed pump speed regulating device according to claim 1, characterized in that through holes are formed in two ends of the end cover mechanism (301), the first rotating shaft (203) and the second rotating shaft (103) extend into the end cover mechanism (300) from the through holes, the transmission mechanism (302) is connected with the first rotating shaft (203) at one end inside the end cover mechanism (301), one end of the transmission mechanism (302) far away from the first rotating shaft (203) is connected with the second rotating shaft (103), and the disconnecting mechanism (303) is arranged on the transmission mechanism (302).

5. A novel feed pump speed regulating device according to claim 1 or 4, characterized in that the end cover mechanism (301) comprises a first end cover (301a) and a second end cover (301b), wherein a limiting clamping groove (301a-1) is formed in the first end cover (301a), the limiting clamping groove (301a-1) is connected with the first end cover (301a) through a bolt, and a limiting protrusion (301b-1) is formed in the position, close to the first end cover (301a), of the second end cover (301b) in the circumferential direction.

6. The novel feed pump speed regulating device of claim 1, characterized in that: the transmission mechanism (302) comprises a first friction block (302a), a second friction block (302b) and a plurality of springs (302c), a circular sleeve (302a-1) is arranged on the first friction block (302a), a plurality of grooves (302a-11) are arranged on the inner wall of the circular sleeve (302a-1) along the radial direction, a limit block (203a) is arranged at one end of the first rotating shaft (203) far away from the high-speed motor (201), the limiting blocks (203a) are matched with the grooves (302a-11), one end of each spring (302c) is fixedly connected with one end of the first friction block (302a), the other end of each spring is fixedly connected with the inner surface of the first end cover (301a), one end of the second friction block (302b) is fixedly connected with the second rotating shaft (103).

7. The novel water feed pump speed regulating device is characterized in that the disconnecting mechanism (303) comprises a connecting rod (303a), a lever (303b), a fixed block (303c) and a telescopic rod (303d), the fixed block (303c) is fixedly connected to the inner surface of the first end cover (301a), the center position of the lever (303b) is movably connected to the fixed block (303c), one end of the connecting rod (303a) is movably connected with one end of the lever (303b), the other end of the connecting rod (303a) is fixedly connected with the first friction block (302a), one end, far away from the connecting rod (303a), of the lever (303b) is movably connected with one end of the telescopic rod (303d), and the telescopic rod (303d) is fixedly connected to the first end cover (301 a).

8. A novel feed pump speed regulating device as claimed in claim 1, characterized in that a preposed pump assembly (400) is arranged on one side of the feed pump (101).

9. A novel water feed pump speed regulating device as claimed in claim 8, characterized in that the pre-pump assembly (400) comprises a deaerator (401), a high-pressure water feed heater (402) and a pre-pump (403), the deaerator (401) is connected to a water inlet of the pre-pump (403) through a pipeline, the pre-pump (403) is fixedly connected to one end of the water feed pump (101), and the high-pressure water feed heater (402) is connected to a water outlet of the water feed pump (101).

10. A novel feed pump speed regulating device according to claim 8 or 9, characterized in that a reduction gear box (500) is arranged between the front pump (403) and the feed pump (101).

Technical Field

The invention relates to the technical field of thermal power generation, in particular to a novel water feeding pump speed regulating device.

Background

At present, the feed water of the once-through boiler passes through a heating area, an evaporation area and a superheating area in sequence under the action of a feed water pump pressure head, and the feed water is completely converted into superheated steam at one time, and the circulation rate of the feed water is equal to 1. In the once-through boiler, the feed water is changed into superheated steam in one step. Thus, the amount of evaporation from the boiler depends not only on the combustion rate, but also on the feed water flow rate. Therefore, to meet the load change requirement, the feed water flow control is one of the most basic means for controlling the temperature of the main steam at the outlet of the boiler. Because the supercritical unit adopts a once-through boiler, the fluctuation of the feed water flow can generate great influence on important process parameters of unit operation, such as unit load, main steam pressure, main steam temperature and the like, and once the feed water pump is not well controlled in speed regulation, the coal-water ratio is dynamically disordered. The feed water flow regulation plays a role in controlling the total energy balance of the boiler and maintaining the temperature of the steam at the outlet of the separator to be changed within a certain range. Large gensets typically control feedwater flow by varying the feedwater pump speed.

In the prior art, the unit set of a large power plant widely adopts the method of changing the rotating speed of a feed pump to adjust the feed flow. The power of the steam-driven feed water pump is a small turbine, and the change of the rotating speed of the feed water pump is realized by changing the steam inlet flow of the small turbine. The rotating speed of the small turbine is controlled by an independent feed pump turbine electrohydraulic control system. After receiving a boiler feed water flow or rotating speed signal, the conventional feed water pump set adjusts the rotating speed of the feed water pump set by controlling the opening of a steam inlet valve of a steam turbine of a feed water pump, and because the rotating speed of a small steam turbine is controlled by a main steam inlet valve in a throttling steam inlet mode, throttling loss exists.

Disclosure of Invention

This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. In this section, as well as in the abstract and the title of the invention of this application, simplifications or omissions may be made to avoid obscuring the purpose of the section, the abstract and the title, and such simplifications or omissions are not intended to limit the scope of the invention.

Therefore, the technical problem to be solved by the invention is to overcome the defect of throttling loss in the prior art, and provide a novel feed pump speed regulating device.

In order to solve the technical problems, the invention provides the following technical scheme: a novel feed pump speed regulating device comprises a small steam turbine, wherein the small steam turbine is used for controlling the rotating speed of a feed pump; the starting assembly is connected with the small steam turbine through the connecting assembly; and the connecting assembly is arranged at one end of the small steam turbine and comprises an end cover mechanism, a transmission mechanism and a disconnecting mechanism, a cavity is arranged in the end cover mechanism, and the transmission mechanism and the disconnecting mechanism are located in the cavity.

As a preferred scheme of the novel water feeding pump speed regulating device, the invention comprises the following steps: the starting assembly comprises a high-speed motor, a converter and a first rotating shaft, the converter is electrically connected with the high-speed motor, and an output shaft of the high-speed motor is fixedly connected with the first rotating shaft.

As a preferred scheme of the novel water feeding pump speed regulating device, the invention comprises the following steps: the small steam turbine is equipped with the second pivot near starting block one side, first pivot and second pivot are connected respectively at coupling assembling both ends.

As a preferred scheme of the novel water feeding pump speed regulating device, the invention comprises the following steps: the end cover mechanism is characterized in that through holes are formed in two ends of the end cover mechanism, the first rotating shaft and the second rotating shaft are arranged in the through holes and extend into the end cover mechanism, the transmission mechanism is connected with the first rotating shaft at one end inside the end cover mechanism, one end, far away from the first rotating shaft, of the transmission mechanism is connected with the second rotating shaft, and the disconnecting mechanism is arranged on the transmission mechanism.

As a preferred scheme of the novel water feeding pump speed regulating device, the invention comprises the following steps: the end cover mechanism comprises a first end cover and a second end cover, wherein a limiting clamping groove is formed in the first end cover and connected with the first end cover through bolts, and a limiting protrusion is arranged at the position, close to the first end cover, of the second end cover in the circumferential direction.

As a preferred scheme of the novel water feeding pump speed regulating device, the invention comprises the following steps: drive mechanism includes first clutch blocks, second clutch blocks and a plurality of spring, be equipped with circular sleeve on the first clutch blocks, radially be equipped with a plurality of recesses along it on the circular sleeve inner wall, high-speed motor one end is kept away from to first pivot is equipped with the stopper, the stopper cooperatees with the recess, and is a plurality of first clutch blocks one end of spring one end fixed connection, the first end cover internal surface of other end fixed connection, second clutch blocks one end fixed connection second pivot.

As a preferred scheme of the novel water feeding pump speed regulating device, the invention comprises the following steps: the disconnecting mechanism comprises a connecting rod, a lever, a fixing block and a telescopic rod, the fixing block is fixedly connected to the inner surface of the first end cover, the center of the lever is movably connected to the fixing block, one end of the connecting rod is movably connected to one end of the lever, the other end of the connecting rod is fixedly connected to the first friction block, one end of the connecting rod is far away from one end of the telescopic rod, and the telescopic rod is fixedly connected to the first end cover.

As a preferred scheme of the novel water feeding pump speed regulating device, the invention comprises the following steps: and a front pump assembly is arranged on one side of the water supply pump.

As a preferred scheme of the novel water feeding pump speed regulating device, the invention comprises the following steps: the pre-pump assembly comprises a deaerator, a high-pressure water supply heater and a pre-pump, the deaerator is connected to a water inlet of the pre-pump through a pipeline, one end of the water supply pump is fixedly connected with the pre-pump, and a water outlet of the water supply pump is connected with the high-pressure water supply heater.

As a preferred scheme of the novel water feeding pump speed regulating device, the invention comprises the following steps: and a reduction gear box is arranged between the front pump and the water feeding pump.

The invention has the beneficial effects that: the invention provides a high-speed motor for a small steam turbine, wherein the high-speed motor can also be used as a generator under the action of a converter, when the high-speed motor is in initial operation and no steam source exists (when auxiliary steam of other units cannot meet the starting requirement of the unit, the generator is used as a motor), and when the unit is stable in operation, the high-speed motor is used as the generator under the action of the converter, so that the throttling loss generated by the control of the rotating speed of a main steam inlet governor can be converted into electric energy for service use.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise. Wherein:

FIG. 1 is a schematic view of the entire structure of embodiment 1;

FIG. 2 is a schematic structural view of example 2;

FIG. 3 is a schematic sectional view of the connecting member in embodiment 3;

fig. 4 is a schematic view of an exploded structure of the connecting member in example 3;

FIG. 5 is a schematic view of the structure of the interrupting mechanism in embodiment 3;

FIG. 6 is a detailed view of the first shaft and the first end cap in accordance with embodiment 3;

fig. 7 is a diagram showing the engagement of the position-limiting engaging groove and the position-limiting protrusion in embodiment 3.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.

Example 1

The embodiment provides a novel feed pump speed regulating device, as shown in figure 1, comprising,

a feed water pump 101 and a small turbine 102, the small turbine 102 controlling the rotational speed of the feed water pump 101. The small turbine 102 changes the rotation speed of the feed water pump 101 by changing the intake flow of the small turbine, and after receiving a boiler feed water flow or rotation speed signal, the feed water pump 101 adjusts the rotation speed of the feed water pump 101 by controlling the opening of the steam inlet valve of the small turbine 102. An air inlet pipeline is arranged on the small turbine 102, an air inlet valve is arranged in the air inlet pipeline, and the air inlet valve is controlled by a turbine electrohydraulic control system of the water feeding pump 101.

In a conventional project, auxiliary steam generated by other units is introduced into the small steam turbine 102 through an air inlet pipeline when the small steam turbine 102 is started, and the steam enters the small steam turbine 102 and then drives a rotor to rotate, so that the small steam turbine 102 starts to operate, and the small steam turbine 102 drives a feed water pump 101 to rotate.

The feed pump 101 is provided with a pre-pump assembly 400 on one side.

The pre-pump assembly 400 comprises a deaerator 401, a high-pressure feed water heater 402 and a pre-pump 403, wherein the deaerator 401 is connected to a water inlet of the pre-pump 403 through a pipeline, the pre-pump 403 is fixedly connected to one end of the feed water pump 101, and the high-pressure feed water heater 402 is connected to a water outlet of the feed water pump 101. A reduction gear box 500 is provided between the pre-pump 403 and the feed pump 101.

The pre-pump 403 mainly functions to increase the pressure at the inlet of the feed water pump 101 and prevent cavitation of the feed water pump 101, and has good cavitation resistance because the pre-pump 403 has a low rotation speed and generally adopts a double-suction structure. The deaerator 401 heats the feed water to a saturation temperature corresponding to the operating pressure of the deaerator 401, removes oxygen and other gases dissolved in the feed water, and prevents and reduces corrosion of boiler feed water pipes, economizers, and other auxiliary equipment; the high-pressure feed water heater 402 comprises a shell and a pipe system, wherein a steam condensation section is arranged at the upper part of an inner cavity of the shell, a drainage cooling section is arranged at the lower part of the inner cavity of the shell, and a feed water inlet and a feed water outlet are arranged at the top ends of a water inlet pipe and a water outlet pipe. After the superheated steam enters the shell from the inlet, the feed water in the upper main spiral pipe can be heated, after the steam is condensed into water, the condensed hot water can heat part of the feed water in the lower cooling spiral pipe, and the condensed water after being utilized flows out of the body through the drainage outlet. The high-pressure feed water heater 402 has the obvious advantages of low energy consumption, compact structure, small occupied area, material saving and the like, and can strictly control the drainage water level, the drainage flow rate and reduce the drainage end difference.

The pre-pump 403 and the water feeding pump 101 are coaxially arranged, so that the transmission efficiency can be effectively improved, and meanwhile, the reduction gear box 500 is arranged between the pre-pump 403 and the water feeding pump 101, so that the rotating speed ratio of the water feeding pump 101 to the pre-pump 403 can be adjusted as required.

Example 2

The embodiment provides a novel feed pump speed regulating device, as shown in fig. 2, which is based on embodiment 1 but differs from embodiment 1 in that:

the invention is provided with a starting assembly 200 at one side of a water feeding pump 101, and the starting assembly 200 is fixedly connected with a small steam turbine 102. A connecting assembly 300 is arranged between the starting assembly 200 and the small steam turbine 102, a second rotating shaft 103 is arranged on one side of the small steam turbine 102 close to the starting assembly 200, and two ends of the connecting assembly 300 are respectively connected with the first rotating shaft 203 and the second rotating shaft 103.

Different from the small steam turbine 102 in embodiment 1 which is started by using auxiliary steam of other units, the starting assembly 200 provided in this embodiment is directly used for starting the small steam turbine 102, which is convenient and fast and improves efficiency.

The starting assembly 200 comprises a high-speed motor 201, an inverter 202 and a first rotating shaft 203, wherein the inverter 202 is electrically connected with the high-speed motor 201, and an output shaft of the high-speed motor 201 is fixedly connected with the first rotating shaft 203. When the steam turbine is started initially, the high-speed motor 201 starts to rotate under the action of the converter 202, and then the small steam turbine 102 is driven to rotate through the connecting mechanism, so that the small steam turbine 102 is directly started to reach a target rotating speed, when the small steam turbine 102 drives the water feeding pump 101 to rotate to a certain rotating speed to supply water to a boiler, when the boiler reaches a certain power, the converter 202 switching circuit enables the high-speed motor 201 to become a generator, at the moment, the rotor of the small steam turbine 102 drives the second rotating shaft 103 to rotate, the second rotating shaft 103 drives the rotating shaft of the first rotating shaft 203 through the connecting component 300, the first rotating shaft 203 drives the generator rotor inside the high-speed motor 201 to do cutting magnetic induction line motion, and then the service power is used under the action of the converter 202. Wherein the converter 202 performs a torque closed loop control of the generator, regulating the braking torque of the generator. The rotating speed of the water feeding pump 101 is under closed-loop control, the converter 202 calculates the feedback rotating speed (or through a speed sensor) and comprehensively calculates the system DCS torque, and the converter 202 is given a torque to adjust the rotating speed of the motor, so that the rotating speed of the system tends to the given speed of the system. In the control mode, the system speed always follows the system setting, so that the function of adjusting the system speed is achieved. Meanwhile, the braking power of the generator counteracts the residual power between the small steam turbine 102 and the water feeding pump 101, and because the converter 202 generates reverse torque, the current inside the converter 202 reversely flows to the input end of the converter 202, so that the function of energy feedback is realized.

In the practical operation of the invention: the method comprises the following steps: when the unit is started, the converter 202 drives the high-speed motor 201 to start working, the output frequency of the converter is gradually increased from zero to the rated frequency, and the rotating speed is increased to the rated rotating speed; step two: when the small steam turbine 102 is started, the converter 202 is not operated, the steam turbine electrohydraulic control system of the water feeding pump 101 sets the heating rotating speed of 800rpm as a target rotating speed, and the rotating speed is controlled by a main throttle of the small steam turbine 102; step three: after warming up is completed, the lowest working rotating speed of the water feeding pump 101 is set as the target rotating speed by the electro-hydraulic control system of the water feeding pump 101 turbine; step four: when the feed pump 101 runs at the lowest working rotating speed, the electro-hydraulic control system of the steam turbine of the feed pump 101 switches the rotating speed control of the small steam turbine 102 to an automatic control mode, at the moment, the boiler still runs in a wet state, the feed water flow of the boiler is controlled by a boiler feed water bypass regulating valve, and the rotating speed of the feed pump 101 is maintained at 3000rpm through the regulation of a main regulating valve of the small steam turbine 102; step five: when the load of the unit rises to 330MW, the boiler feed water bypass is withdrawn, the boiler feed water is switched to be in main pipe operation, namely, the boiler feed water bypass is adjusted through the rotating speed of the feed water pump 101, the boiler feed water bypass is put into the converter 202, and the main regulating valve of the small steam turbine 102 is opened step by step at a given rising rate (200rpm/min) until the main regulating valve of the small steam turbine 102 reaches the maximum opening degree.

The small turbine 102 is provided with a high-speed motor 201 and a converter 202 and used for balancing redundant power between the small turbine 102 and a water feeding pump 101 group, the scheme that the high-speed motor 201 and the converter 202 control the rotating speed of the water feeding pump 101 is adopted according to heat balance calculation of a main engine plant, the high-speed motor 201 has output under the working condition of 30% THA-VWO, the residual power reaches the maximum value of 16.58MW under the working condition of 75% THA, and generator power generation can be combined to the grid to reduce the power consumption of the main engine plant and improve the efficiency of the main engine plant besides supplying power to the main engine plant.

Example 3

The present embodiment provides a novel feed pump speed regulating device, as shown in fig. 3-6, which is based on the embodiments 1-2 but differs from the above embodiments in that:

the connecting assembly 300 comprises an end cover mechanism 301, a transmission mechanism 302 and a disconnecting mechanism 303, a cavity is arranged in the end cover mechanism 301, the transmission mechanism 302 and the disconnecting mechanism 303 are located in the cavity, one end of the transmission mechanism 302 is connected with the first rotating shaft 203, one end of the transmission mechanism 302, which is far away from the first rotating shaft 203, is connected with the second rotating shaft 103, and the disconnecting mechanism 303 is arranged on the transmission mechanism 302.

The end cover mechanism 301 comprises a first end cover 301a and a second end cover 301b, a limiting clamping groove 301a-1 is arranged on the first end cover 301a, the limiting clamping groove 301a-1 is connected with the first end cover 301a through a bolt, and a limiting protrusion 301b-1 is arranged on the second end cover 301b close to the first end cover 301a along the circumferential direction. In actual operation, the first end cover 301a is attached to the opening of the second end cover 301b, and then the limiting clamping groove 301a-1 is fixed, at this time, the limiting protrusion 301b-1 is just positioned in the groove 302a-11 of the limiting clamping groove 301a-1, and the edge of the limiting protrusion 301b-1 is attached to the side edge of the limiting clamping groove 301a-1 for limiting, so that the first end cover 301a is prevented from rotating along the axial direction and the radial direction, but is not limited to rotating along the center of the circle.

The transmission mechanism 302 comprises a first friction block 302a, a second friction block 302b and a plurality of springs 302c, a circular sleeve 302a-1 is arranged on the first friction block 302a, a plurality of grooves 302a-11 are formed in the inner wall of the circular sleeve 302a-1 along the radial direction, a limiting block 203a is arranged at one end, away from the high-speed motor 201, of the first rotating shaft 203, the limiting block 203a is matched with the grooves 302a-11, one end of each of the plurality of springs 302c is fixedly connected with one end of the first friction block 302a, the other end of each of the plurality of springs 302c is fixedly connected with the inner surface of the first end cover 301a, and one end of the second friction block 302b is fixedly connected with the second rotating shaft 103. One end of the first rotating shaft 203 is provided with a limiting block 203a, the limiting block 203a is matched with the groove 302a-11 on the inner wall of the circular sleeve 302a-1, the side edge of the limiting block 203a is attached to the inner wall of the groove 302a-11, and therefore the first rotating shaft 203 and the first friction block 302a cannot rotate relatively, but the first rotating shaft 203 cannot move in the circular sleeve 302a-1 along the axial direction of the first rotating shaft 203. Because the distance between the first end cover 301a and the second end cover 301b is fixed, one end of the spring 302c is fixed on the inner wall of the first end cover 301a, and the other end thereof is fixed on the first friction block 302a, and further under the action of the spring 302c, the first friction block 302a is always tightly contacted with the second friction block 302b, and because the end surfaces of the first friction block 302a contacted with the second friction block 302b are all provided with materials with larger friction coefficients, such as: the asbestos-based friction material has a large friction coefficient and can generate large friction force. Therefore, when the second rotating shaft 103 rotates, the first rotating shaft 203 rotates together with the second rotating shaft 103 under the action of friction force; when the first rotating shaft 203 rotates, the second rotating shaft 103 rotates together with the first rotating shaft 203 by the friction force. Therefore, the high-speed motor 201 can drive the small turbine 102 to rotate through the connecting mechanism, and similarly, the small turbine 102 can also drive the high-speed motor 201 to rotate.

The disconnecting mechanism 303 includes a connecting rod 303a, a lever 303b, a fixed block 303c and a telescopic rod 303d, the fixed block 303c is fixedly connected to the inner surface of the first end cap 301a, the center position of the lever 303b is movably connected to the fixed block 303c and can be connected to a pin shaft, one end of the connecting rod 303a is movably connected to one end of the lever 303b, one end of the connecting rod 303a is connected to the lever 303b by a pin shaft, the other end of the connecting rod 303a is fixedly connected to the first friction block 302a, one end of the lever 303b, which is far away from the connecting rod 303a, is movably connected to one end of the telescopic rod 303d and is connected to the pin shaft, the telescopic rod 303d is fixedly connected to the first end cap 301a, and one end of the telescopic rod 303d is connected to the electric control hydraulic cylinder by a hydraulic pipeline. One end of the connecting rod 303a is fixedly connected with the first friction block 302a, the other end of the connecting rod 303a is connected with the lever 303b, meanwhile, the lever 303b uses the fixed block 303c as a fulcrum, the other end of the lever 303b is connected with the telescopic rod 303d, and the telescopic rod 303d is controlled by the electrically controlled hydraulic cylinder 303e, so that when the telescopic rod 303d extends, the end of the lever 303b connected with the telescopic rod 303d is forced to move in a direction away from the first end cover 301a, further, the other end of the lever 303b moves in a direction to approach the first end cap 301a, and therefore the link 303a moves in a direction to approach the first end cap 301a, and one end of the link 303a is connected to the first friction block 302a, so that the first friction block 302a moves in a direction to approach the first end cap 301a, and at this time, the first friction block 302a and the second friction block 302b separate from each other, and the power transmission between the starting assembly 200 and the water feed pump 101 assembly 100 is cut off.

When the small steam turbine 102 runs at a high speed, the high-speed motor 201 is driven to generate power for a plant area, when an emergency occurs, the rotating speed of the small steam turbine 102 is unstable, so that great vibration is caused to the high-speed motor 201, the high-speed motor 201 is damaged, an operator only needs to start a switch of an electrically controlled hydraulic cylinder at the moment, the electrically controlled hydraulic cylinder drives a telescopic rod 303d to extend out through a hydraulic pipe, the telescopic rod 303d pushes one end of a lever 303b to move towards a direction close to a first friction block 302a, the other end of the lever 303b drives a connecting rod 303a to move away from the first friction block 302a, the connecting rod 303a drives the first friction block 302a to separate from a second friction block 302b at the moment, power is cut off, the high-speed motor 201 is in communication with the small steam turbine 102, the high-speed motor 201 does not vibrate gradually and stops, when the small steam turbine 102 runs normally, the electrically controlled hydraulic cylinder is started to reset, and the first friction block 302a can be continuously contacted with the second friction block 302b, the power transmission between the high-speed motor 201 and the small turbine 102 is resumed.

It is important to note that the construction and arrangement of the present application as shown in the various exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters (e.g., temperatures, pressures, etc.), mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter recited in this application. For example, elements shown as integrally formed may be constructed of multiple parts or elements, the position of elements may be reversed or otherwise varied, and the nature or number of discrete elements or positions may be altered or varied. Accordingly, all such modifications are intended to be included within the scope of this invention. The order or sequence of any process or method steps may be varied or re-sequenced according to alternative embodiments. In the claims, any means-plus-function clause is intended to cover the structures described herein as performing the recited function and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present inventions. Therefore, the present invention is not limited to a particular embodiment, but extends to various modifications that nevertheless fall within the scope of the appended claims.

Moreover, in an effort to provide a concise description of the exemplary embodiments, all features of an actual implementation may not be described (i.e., those unrelated to the presently contemplated best mode of carrying out the invention, or those unrelated to enabling the invention).

It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort might be complex and time consuming, but would nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure, without undue experimentation.

It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.