Energy-saving steam turbine

Abstract

The invention relates to the technical field of steam turbines, in particular to an energy-saving steam turbine which comprises a fixing box, a supporting frame and a heat preservation box are arranged on the fixing box, a steam inlet is formed in the top of the fixing box, and a steam inlet one-way valve is arranged on the heat preservation box. A driving box is arranged on the fixed box, a driving rod is rotationally matched with the inner side wall of the driving box, a plurality of driving blades are fixedly connected to the driving rod, and the driving rod extends out of the driving box to be rotationally matched with the side wall of the driving box. An impeller shell is fixedly connected to the inner bottom wall of the fixed box and communicates with a driving pipe, the driving pipe communicates with the interior of the driving box, a rotating assembly is arranged in the impeller shell, and a suction assembly and a transmission assembly are arranged in the fixed box. The driving box communicates with the impeller shell, so that steam can enter the driving box after expansion acting, the transmission assembly is driven to operate through rotation of the driving blades and the driving rod, secondary acting is achieved, energy waste caused by direct emptying is reduced, and the energy utilization rate of the device is increased.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of steam turbines, in particular to an energy-saving steam turbine. BACKGROUND

[0002] A steam turbine is a rotary power device that efficiently converts the thermal energy of steam into mechanical energy. Its core principle is to use high-temperature and high-pressure steam to expand and accelerate in the nozzle to form a high-speed gas flow, which impacts the blades to rotate the rotor, thereby driving the generator, compressor and other loads to work. With the advantages of wide power range, high efficiency and stable operation, it is widely used in the fields of power, petrochemical, metallurgy, shipbuilding and other fields, and is the key equipment for energy conversion in modern industry.

[0003] The prior art such as YR single-stage steam turbine, when in operation, steam first enters the nozzle to expand and accelerate, converting thermal energy into kinetic energy to form a high-speed steam flow; then the high-speed steam flow contacts the moving blades on the impeller, changes the flow direction, and generates force on the moving blades through the impulse principle, making the impeller and impeller shaft rotate to output mechanical work, and finally the steam after work is exhausted.

[0004] Although the above device can realize the function of the steam turbine to a certain extent, but after the steam work is completed, the steam is directly exhausted, which has the problem of insufficient energy utilization. In summary, the above device will directly exhaust the steam after the steam work is completed, which leads to insufficient energy utilization and has become a difficult problem to be solved in the field, therefore it is necessary to propose an energy-saving steam turbine. SUMMARY

[0005] To solve the above problems, the present application provides an energy-saving steam turbine, which communicates the drive box with the impeller shell, so that the steam can enter the drive box after expansion and work, and the transmission assembly is driven to work by the rotation of the drive leaves and drive rods, realizing secondary work, reducing the energy waste caused by direct exhaust, and improving the energy utilization of the device.

[0006] In order to achieve the above purpose, the technical scheme of the present application is as follows: an energy-saving steam turbine, comprising a fixed box, a support frame is fixedly connected to the bottom of the fixed box, a heat preservation box is fixedly connected to the inner top wall of the fixed box, an inlet port is opened at the top of the fixed box, an inlet one-way valve is communicated on the heat preservation box, the inlet one-way valve is located directly below the inlet port, and the flow direction of the inlet one-way valve is one-way from the outside to the inside of the heat preservation box; a drive box is fixedly connected to the inner side wall of the fixed box, a drive rod is rotatably connected to the inner side wall of the drive box, a plurality of drive leaves are fixedly connected to the drive rod, and the drive rod extends out of the drive box and is rotatably connected with the side wall of the drive box.

[0007] The impeller shell is fixedly connected to the inner bottom wall of the fixed box, a driving pipe is communicated with the impeller shell, the driving pipe is communicated with the inside of the driving box, a rotating assembly for rotating under the driving of steam is arranged in the impeller shell, a suction assembly for conveying steam is arranged in the fixed box, and a transmission assembly for driving the suction assembly to work is arranged in the fixed box.

[0008] The transmission assembly comprises a fixing frame fixedly connected to the inner side wall of the fixed box, a transmission plate laterally slidingly fitted on the fixing frame, a guide groove is formed in the transmission plate, a driving rod extends through the fixing frame and is rotatably fitted in the guide groove, an eccentric cam is fixedly connected to one end of the driving rod away from the driving box, and guide blocks are fixedly connected to the transmission plate in a symmetrical manner, and the guide blocks are located in the movement path of the cam.

[0009] The technical principle of the above scheme is as follows: The high-pressure steam is conveyed into the inside of the fixed box through the steam inlet and the steam one-way valve, sequentially passes through the heat preservation box and the suction assembly, enters the impeller shell to do work, and then enters the driving box through the driving pipe to impact the driving blade, so that the driving blade drives the driving rod and the cam to rotate, the cam contacts the guide block during rotation, the guide block drives the transmission plate to reciprocate laterally, and the transmission plate drives the suction assembly to work.

[0010] The above scheme has the following beneficial effects: 1. The driving box is communicated with the impeller shell, so that the steam can enter the driving box after expansion and work, the transmission assembly is driven to work by the rotation of the driving blade and the driving rod, secondary work is realized, energy waste caused by direct emptying is reduced, and the energy utilization rate of the device is improved.

[0011] 2. The guide blocks are located in the movement path of the cam, so that the cam can contact the guide blocks when being driven by the driving shaft to rotate, and then the guide blocks drive the transmission plate to move laterally, and in this process, the driving force of the driving shaft is the impact force of the steam on the driving blade after work expansion, so that no additional energy consumption equipment is needed, thereby reducing the energy consumption of the device.

[0012] 3. The design of the heat preservation box enables the steam to be stored in the heat preservation box first after entering the inside of the device, the pressure in the heat preservation box increases with the entry of the steam, and then the pressure of the steam before work can be controlled, so that the work effect of the steam during work can be controlled.

[0013] Further, a controller is further included, the suction assembly comprises a suction box fixedly connected to the inner side wall of the fixed box, a suction plate is laterally slidingly fitted on the inner side wall of the suction box, and one end of the transmission plate extends through the side wall of the suction box and is fixedly connected to the suction plate in the suction box.

[0014] The first steam conveying pipe is communicated with the suction box, one end of the first steam conveying pipe away from the suction box is communicated with the inside of the heat preservation box, and a steam electromagnetic one-way valve is communicated with the communication position of the first steam conveying pipe and the heat preservation box, the flow direction of the steam electromagnetic one-way valve is one-way from the heat preservation box to the inside of the first steam conveying pipe; the second steam conveying pipe is communicated with the bottom of the suction box, one end of the second steam conveying pipe away from the suction box is communicated with the inside of the impeller shell, and a nozzle is detachably connected with the communication position of the second steam conveying pipe; the sidewall of the heat preservation box is fixedly connected with an air pressure sensor, and the controller is used for receiving the air pressure signal sent by the air pressure sensor and controlling the opening and closing of the steam electromagnetic one-way valve according to the air pressure signal.

[0015] Beneficial effects: the suction box as an intermediate pressure regulating device can adjust the high-pressure steam in the heat preservation box to a pressure level suitable for the device to work, so as to reduce the entropy increase loss caused by pressure mutation in the single-stage steam turbine. At the same time, the design of the nozzle and the impeller can achieve multi-stage expansion effect of the steam, so that it approaches the isentropic expansion process, thereby improving the thermal efficiency.

[0016] Further, the rotating assembly comprises an impeller shaft rotatably fitted to the inner sidewall of the impeller shell, and a plurality of impellers are arranged in the impeller shell and fixedly connected with the impeller shaft coaxially.

[0017] Beneficial effects: the design of arranging a plurality of impellers along the axial direction forms a multi-stage expansion structure inside the device. Among them, the pressure of the steam continues to decrease when passing through the plurality of impellers, and the enthalpy drop is dispersed to each stage, approaching the isentropic expansion process, thereby further improving the thermal efficiency.

[0018] Further, the limiting assembly for limiting the transmission plate comprises a limiting frame fixedly connected to the fixed frame on both sides, and the two ends of the transmission plate are located in the limiting frame adjacent to the transmission plate and are in transverse sliding fit with the limiting frame.

[0019] Beneficial effects: the design of the limiting frame fixedly connected to the fixed frame on both sides limits the movement direction of the transmission plate, reduces the deviation of the transmission plate in the vertical direction, and improves the movement stability.

[0020] Further, an isolation layer is formed in the sidewall of the heat preservation box.

[0021] Beneficial effects: the design of the isolation layer reduces the heat exchange efficiency between the steam in the heat preservation box and the outside, reduces the heat loss of the steam, and thereby reduces the energy consumption of the steam.

[0022] Further, the vacuum suction assembly for vacuumizing the isolation layer comprises a piston box fixedly connected to the inner sidewall of the fixed box, a piston plate is in transverse sliding fit with the inner sidewall of the piston box, and one end of the transmission plate away from the suction box extends through the sidewall of the piston box into the piston box and is fixedly connected with the piston plate.

[0023] The piston box is communicated with a suction pipe, one end of the suction pipe away from the piston box is communicated with the isolation layer, a suction check valve is communicated at the communication position, and the flow direction of the suction check valve is one-way from the isolation layer to the suction pipe.

[0024] Beneficial effects: through the reciprocating movement of the suction plate, the suction and discharge of the gas in the isolation layer can be realized, so that the vacuum degree of the isolation layer is kept stable, the heat loss of the steam is further reduced, and the heat insulation effect of the isolation layer is improved.

[0025] Further, the heat preservation assembly for reducing the heat loss of the steam is further included, the heat preservation assembly includes a heat preservation cylinder fixedly connected to the top of the fixed box, the heat preservation cylinder is located directly above the steam inlet, and a heat preservation pipe is communicated with the heat preservation cylinder.

[0026] Beneficial effects: the design of the heat preservation pipe enables the steam after work to heat the heat preservation pipe, so that the steam not working can be insulated to a certain extent when entering the device, and the heat loss caused by direct contact with external gas is reduced.

[0027] Further, the cross-sectional radii of the impellers gradually increase in the direction away from the second steam conveying pipe.

[0028] Beneficial effects: when the steam passes through the impeller, the volume gradually expands, the contact area gradually increases, and the kinetic energy gradually decreases, and the design that the impeller gradually increases in the axial direction enables the impeller to adapt to the change of the steam, so that the step-by-step utilization of kinetic energy is realized.

[0029] Further, one end of the impeller shaft is coaxially and fixedly connected with an extension shaft, the extension shaft extends through the impeller shell and the side wall of the fixed box to the outside, and the extension shaft is rotationally connected with the side wall of the impeller shell and the side wall of the fixed box.

[0030] Beneficial effects: the design of the extension shaft enables the rotating force of the impeller shaft to be transmitted to the outside, so that the application range and flexibility of the device are improved.

[0031] Further, an oil seal is arranged at the rotationally connected position of the extension shaft and the side wall of the impeller shell.

[0032] Beneficial effects: through the design of the oil seal at the rotationally connected position of the extension shaft and the impeller shell, the escape rate of the steam can be reduced, so that the energy loss caused by the escape of the steam is reduced.

[0033] Additional aspects and advantages of the application will be made apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 Fig. 1 is a schematic view of the shaft of the energy-saving steam turbine of the present application.

[0035] Figure 2 Fig. 2 is a schematic view of the internal structure of the energy-saving steam turbine of the present application.

[0036] Figure 3 Fig. 3 is a schematic view of the suction box and the piston box of the energy-saving steam turbine of the present application.

[0037] Figure 4 Fig. 4 is a schematic view of the impeller shell of the energy-saving steam turbine of the present application.

[0038] Figure 5 Fig. 5 is a schematic view of the driving box of the energy-saving steam turbine of the present application.

[0039] Figure 6 Fig. 6 is a schematic view of the heat preservation box of the energy-saving steam turbine of the present application.

[0040] The reference signs in the attached drawings of the specification include: 1, fixed box; 2, support frame; 3, heat preservation box; 4, steam inlet check valve; 5, driving box; 6, driving rod; 7, driving blade; 8, impeller shell; 9, fixed frame; 10, transmission plate; 11, cam; 12, guide block; 13, suction box; 14, suction plate; 15, first steam conveying pipe; 16, steam electromagnetic check valve; 17, second steam conveying pipe; 18, nozzle; 19, impeller shaft; 20, impeller; 22, extension shaft; 23, piston box; 24, piston plate; 25, suction pipe; 26, suction check valve; 27, air outlet check valve; 28, heat preservation cylinder; 29, limiting frame. DETAILED DESCRIPTION

[0041] The present application will be further described in detail through specific embodiments: Embodiment 1 As shown in the attached drawings: Figure 1 and Figure 6 An energy-saving steam turbine comprises a controller and a fixed box 1, and the bottom of the fixed box 1 is integrally formed with a support frame 2. A heat preservation box 3 is welded to the top wall of the fixed box 1, and an isolation layer is formed in the side wall of the heat preservation box 3. A steam inlet is formed in the top of the fixed box 1, and a steam inlet check valve 4 is connected to the heat preservation box 3, which is located directly below the steam inlet, and the flow direction of the steam inlet check valve 4 is from the outside to the inside of the heat preservation box 3.

[0042] As shown in the attached drawings: Figure 5As shown, the inner side wall of the fixed box 1 is welded with a driving box 5, the inner side wall of the driving box 5 is rotationally fitted with a driving rod 6, the driving rod 6 is integrally formed with a plurality of driving leaves 7, and the driving rod 6 extends out of the driving box 5 and is rotationally fitted with the side wall of the driving box 5 (the driving leaves 7 are made of alloy steel, and the strength is ≥800 MPa, and when the steam flow rate is 30-80 m / s, the working efficiency of the driving leaves 7 can reach 65%-72%).

[0043] As shown in Figure 2 , the inner bottom wall of the fixed box 1 is bolted and connected with an impeller shell 8, the impeller shell 8 is communicated with a driving pipe, and the driving pipe is communicated with the inside of the driving box 5.

[0044] The fixed box 1 is provided with a suction assembly for conveying steam, and a transmission assembly for driving the suction assembly to work.

[0045] As shown in Figure 2 and Figure 3 , the transmission assembly includes a fixed frame 9 welded on the inner side wall of the fixed box 1, the fixed frame 9 is horizontally slidably fitted with a transmission plate 10, the transmission plate 10 is provided with a guide groove, the driving rod 6 extends through the fixed frame 9 and is rotationally fitted with the fixed frame 9; the end of the driving rod 6 away from the driving box 5 is eccentrically welded with a cam 11, the transmission plate 10 is integrally formed with a guide block 12, and the guide block 12 is located in the movement path of the cam 11.

[0046] As shown in Figure 2 and Figure 3 , the suction assembly includes a suction box 13 welded on the inner side wall of the fixed box 1, the inner side wall of the suction box 13 is horizontally slidably fitted with a suction plate 14, and one end of the transmission plate 10 extends through the side wall of the suction box 13 and is welded with the suction plate 14 inside the suction box 13 (the gap between the suction plate 14 and the inner side wall of the suction box 13 is 0.05-0.1 mm, and the steam leakage rate can be controlled within 0.5%).

[0047] The suction box 13 is communicated with a first steam conveying pipe 15, the end of the first steam conveying pipe 15 away from the suction box 13 is communicated with the inside of the heat preservation box 3, and the communication part of the first steam conveying pipe 15 with the heat preservation box 3 is communicated with a steam electromagnetic one-way valve 16, and the flow direction is from the heat preservation box 3 to the inside of the first steam conveying pipe 15; the bottom of the suction box 13 is communicated with a second steam conveying pipe 17, the end of the second steam conveying pipe 17 away from the suction box 13 is communicated with the inside of the impeller shell 8, and the communication part is detachably provided with a nozzle 18; the side wall of the heat preservation box 3 is fixedly connected with an air pressure sensor, the controller is used for receiving the air pressure signal sent by the air pressure sensor, and controlling the opening and closing of the steam electromagnetic one-way valve 16 according to the air pressure signal.

[0048] Specifically, after the high-pressure steam is delivered into the heat preservation box 3 through the steam inlet and the steam inlet check valve 4, the high-pressure steam can enter the suction box 13 through the steam electromagnetic check valve 16 and the first steam delivery pipe 15, because the two ends of the first steam delivery pipe 15 are communicated with the heat preservation box 3 and the suction box 13 respectively, and the steam electromagnetic check valve 16 is located at the communication position of the first steam delivery pipe 15 and the heat preservation box 3. At this time, the high-pressure steam in the suction box 13 can enter the impeller shell 8 through the second steam delivery pipe 17 and the nozzle 18, because the two ends of the second steam delivery pipe 17 are communicated with the suction box 13 and the impeller shell 8 respectively, and the nozzle 18 is located at the communication position of the second steam delivery pipe 17 and the impeller shell 8.

[0049] When the high-pressure steam finishes work in the impeller shell 8, the high-pressure steam in the impeller shell 8 can enter the driving box 5 through the driving pipe, because the two ends of the driving pipe are communicated with the impeller shell 8 and the driving box 5 respectively. At this time, the driving leaf 7 can be rotated by the impact of the steam entering the driving box 5, because the driving rod 6 is rotationally fitted with the inner side wall of the driving box 5, and the driving leaf 7 is located on the driving rod 6. As shown in Figure 5 , the driving rod 6 can be rotated by the driving leaf 7, and the cam 11 eccentrically welded with the driving rod 6 can be rotated by the driving rod 6. In this process, the cam 11 can contact the guide block 12 when rotating, and the guide block 12 can be pushed by the cam 11 when rotating, so that the guide block 12 can drive the transmission plate 10 to move transversely and reciprocally.

[0050] As shown in Figure 3 , the suction plate 14 can move transversely and reciprocally in the suction box 13 when the transmission plate 10 moves transversely and reciprocally, so as to realize the auxiliary delivery of the high-pressure steam. As shown in Figure 3 , the right side volume of the suction plate 14 increases when the suction plate 14 moves to the left, so as to reserve space for the high-pressure steam. When the suction plate 14 moves to the right, the suction plate 14 can press the high-pressure steam in the suction box 13, so that the pressure of the high-pressure steam increases, the speed of the high-pressure steam increases when the high-pressure steam contacts the second steam delivery pipe 17 and the nozzle 18, and the kinetic energy of the high-pressure steam also increases.

[0051] In this process, when the steam is input, the worker first controls the steam electromagnetic check valve 16 to be closed by the controller. At this time, the air pressure in the heat preservation box 3 increases due to the continuous input of the high-pressure steam into the heat preservation box 3. The worker sets the air pressure threshold value, and when the air pressure sensor monitors that the current air pressure signal exceeds the air pressure threshold value, the controller controls the steam electromagnetic check valve to be opened, so as to release the high-pressure steam.

[0052] As shown inFigure 4 As shown, the impeller shell 8 is provided with a rotating assembly for rotating under the driving of steam, the rotating assembly comprises an impeller shaft 19 rotatingly fitted on the inner side wall of the impeller shell 8, and the impeller shell 8 is provided with a plurality of impellers 20, which are coaxially welded with the impeller shaft 19. The cross-sectional radius of the impeller 20 gradually increases in the direction away from the second steam conveying pipe 17. The impeller shaft 19 is integrally formed with an extension shaft 22 at one end, the extension shaft 22 extends through the side wall of the impeller shell 8 and the fixed box 1 to the outside, and the extension shaft 22 is rotatingly fitted with the side wall of the impeller shell 8 and the side wall of the fixed box 1, and the rotating fitting part of the extension shaft 22 and the side wall of the impeller shell 8 is interference fitted with an oil seal.

[0053] Specifically, as shown in the drawings, Figure 4 The second steam conveying pipe 17 in the embodiment is located at the right end of the impeller shell 8. When the high-pressure steam continuously enters the inside of the impeller shell 8 through the nozzle 18, its volume will expand, and the high-pressure steam will move to the left. At this time, the high-pressure steam moves to the direction of the impeller 20, which can generate an impact force on the impeller 20, so that the impeller 20 can rotate under the impact of the high-pressure steam. Since the impeller 20 is welded with the impeller shaft 19, and the impeller shaft 19 is rotatingly fitted with the impeller shell 8, when the high-pressure steam impacts the impeller 20, it can drive the impeller shaft 19 to rotate through the impeller 20, and then drive the extension shaft 22 integrally formed with the impeller shaft 19 to rotate, and transmit power to the outside. In this process, since the cross-sectional radius of the impeller 20 gradually increases in the direction away from the second steam conveying pipe 17, and the high-pressure steam will be subjected to energy loss after passing through the impeller 20 and the guide wheel 21 each time, and its volume will also increase accordingly, therefore, when the high-pressure steam moves to the left, the size of the impeller 20 can be adapted to the form of the high-pressure steam, thereby realizing the adaptation of multi-stage expansion, and improving the energy utilization efficiency (as the radius of the impeller 20 increases, the flow area of the steam expands, the pressure and temperature continuously decrease, and the specific volume increases, so that the expansion process of the steam is closer to the isentropic expansion, which reduces the energy loss and improves the thermal efficiency). Figure 4

[0054] As shown in the drawings, Figure 2 and Figure 3 It also includes a vacuum suction assembly for vacuumizing the isolation layer, the vacuum suction assembly comprises a piston box 23 welded on the inner side wall of the fixed box 1, and a piston plate 24 is slidingly fitted on the inner side wall of the piston box 23, and the end of the transmission plate 10 away from the suction box 13 extends through the side wall of the piston box 23 to the inside of the piston box 23 and is welded with the piston plate 24 (the fitting gap between the piston plate 24 and the inner side wall of the piston box 23 is 0.03-0.08 mm).

[0055] ​The piston box 23 is communicated with a suction pipe 25, one end of the suction pipe 25 away from the piston box 23 is communicated with the isolation layer, and a suction check valve 26 is communicated at the communication position, the flow direction of the suction check valve 26 is one-way from the isolation layer to the suction pipe 25; the piston box 23 is also communicated with a gas outlet check valve 27, the flow direction of the gas outlet check valve 27 is one-way from the inside of the piston box 23 to the outside of the piston box 23.

[0056] Specifically, when the transmission plate 10 reciprocates laterally, it can also drive the piston plate 24 welded thereto to reciprocate laterally in the piston box 23, so that it can suck the air in the isolation layer into the piston box 23 through the suction pipe 25 and the suction check valve 26, and then discharge it through the gas outlet check valve 27, so that the inside of the isolation layer is kept in a vacuum design, thereby enabling the high-pressure steam in the heat preservation box 3 to have a good heat preservation effect and reducing the heat loss caused by heat exchange.

[0057] The heat preservation assembly also includes a heat preservation cylinder 28 welded to the top of the fixed box 1, the heat preservation cylinder 28 is located directly above the steam inlet, and a heat preservation pipe is communicated with the heat preservation cylinder 28, one end of the heat preservation pipe away from the heat preservation cylinder 28 is communicated with the inside of the impeller shell 8. In this embodiment, the heat preservation cylinder 28 is made of aluminum silicate fiber felt (thermal conductivity ≤0.03 W / (m·K)).

[0058] Specifically, after the high-pressure steam finishes work, it also enters the heat preservation cylinder 28 through the heat preservation pipe, and heats the heat preservation cylinder 28 and the air around it through its own residual heat, thereby performing heat preservation operation on the high-pressure steam that has not worked, so as to reduce the energy loss of the high-pressure steam.

[0059] The present application communicates the drive box 5 with the impeller shell 8, so that the steam can enter the drive box 5 after expansion and work, drive the transmission assembly to work through the rotation of the drive leaf 7 and the drive rod 6, realize secondary work, reduce the energy waste caused by direct emptying, and improve the energy utilization rate of the device.

[0060] Embodiment 2: As shown in the accompanying drawings Figure 2 and Figure 3 The difference from embodiment 1 is that a limiting assembly for limiting the transmission plate 10 is further included, the limiting assembly includes limiting racks 29 symmetrically welded to the fixed frame 9, and the two ends of the transmission plate 10 are located in the limiting racks 29 adjacent thereto and are in lateral sliding fit with the limiting racks 29.

[0061] Specifically, when the transmission plate 10 reciprocates laterally, since the two ends of the transmission plate 10 are located in the limiting racks 29, the transmission plate 10 is limited by the limiting racks 29, so that the movement path of the transmission plate 10 is limited, the deviation of the transmission plate 10 in the vertical direction is reduced, and the movement stability of the transmission plate 10 is improved.

[0062] Obviously, the above-mentioned embodiments are only examples for clearly illustrating the present application, and are not intended to limit the embodiments. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, it is not necessary and also impossible to enumerate all the embodiments. The obvious changes or variations derived from the above description are still within the protection scope of the present application.

Claims

1. An energy-saving steam turbine comprising a fixed casing (1), the bottom of which is fixedly connected with a support frame (2), characterized in that, The fixed box (1) is fixedly connected with a heat preservation box (3) on the inner top wall, the fixed box (1) is provided with an inlet on the top, the heat preservation box (3) is communicated with an inlet check valve (4), the inlet check valve (4) is located directly below the inlet, and the flow direction of the inlet check valve (4) is one-way from the outside to the inside of the heat preservation box (3); the inner side wall of the fixed box (1) is fixedly connected with a drive box (5), the inner side wall of the drive box (5) is rotatably connected with a drive rod (6), the drive rod (6) is fixedly connected with a plurality of drive blades (7), and the drive rod (6) extends out of the drive box (5) and is rotatably connected with the side wall of the drive box (5); The inner bottom wall of the fixed box (1) is fixedly connected with an impeller shell (8), the impeller shell (8) is communicated with a drive pipe, the drive pipe is communicated with the inside of the drive box (5), the impeller shell (8) is provided with a rotating assembly for rotating under the driving of steam, the fixed box (1) is provided with a suction assembly for conveying steam and a transmission assembly for driving the suction assembly to work; The transmission assembly comprises a fixed frame (9) fixedly connected to the inner side wall of the fixed box (1), a transmission plate (10) slidably connected to the fixed frame (9), a guide groove is formed in the transmission plate (10), the drive rod (6) extends through the fixed frame (9) and is rotatably connected with the fixed frame (9); one end of the drive rod (6) away from the drive box (5) is eccentrically fixedly connected with a cam (11), the transmission plate (10) is fixedly connected with a guide block (12) symmetrically, and the guide block (12) is located in the movement path of the cam (11).

2. The energy-saving steam turbine according to claim 1, characterized in that Further comprising a controller, the suction assembly comprises a suction box (13) fixedly connected to the inner side wall of the fixed box (1), a suction plate (14) slidably connected to the inner side wall of the suction box (13), and one end of the transmission plate (10) extends through the side wall of the suction box (13) and is fixedly connected with the suction plate (14) in the suction box (13); The suction box (13) is communicated with a first steam conveying pipe (15), one end of the first steam conveying pipe (15) away from the suction box (13) is communicated with the inside of the heat preservation box (3), a steam electromagnetic check valve (16) is arranged at the communication position of the first steam conveying pipe (15) and the heat preservation box (3), and the flow direction of the steam electromagnetic check valve (16) is one-way from the heat preservation box (3) to the inside of the first steam conveying pipe (15); the bottom of the suction box (13) is communicated with a second steam conveying pipe (17), one end of the second steam conveying pipe (17) away from the suction box (13) is communicated with the inside of the impeller shell (8), and a nozzle (18) is detachably connected at the communication position; the side wall of the heat preservation box (3) is fixedly connected with an air pressure sensor, the controller is used for receiving an air pressure signal sent by the air pressure sensor and controlling the opening and closing of the steam electromagnetic check valve (16) according to the air pressure signal.

3. The energy-saving steam turbine according to claim 2, characterized in that The rotating assembly comprises an impeller shaft (19) rotatably connected to the inner side wall of the impeller shell (8), and a plurality of impellers (20) are arranged in the impeller shell (8) and fixedly connected with the impeller shaft (19) coaxially.

4. The energy-saving steam turbine according to claim 3, characterized in that The limiting assembly for limiting the transmission plate (10) comprises limiting racks (29) fixedly connected to the fixed frame (9) in symmetry, and the two ends of the transmission plate (10) are located in the limiting racks (29) adjacent thereto and are in transverse sliding fit with the limiting racks (29).

5. The energy-saving steam turbine according to claim 4, characterized in that The heat preservation box (3) is provided with an isolation layer in the side wall.

6. The energy-saving steam turbine according to claim 5, characterized in that The vacuum pumping assembly for pumping the isolation layer comprises a piston box (23) fixedly connected to the inner side wall of the fixed box (1), and the inner side wall of the piston box (23) is in transverse sliding fit with a piston plate (24), and the end of the transmission plate (10) away from the pumping box (13) extends through the side wall of the piston box (23) into the piston box (23) and is fixedly connected with the piston plate (24). The piston box (23) is communicated with a pumping pipe (25), the end of the pumping pipe (25) away from the piston box (23) is communicated with the isolation layer, and the communication part is communicated with a pumping check valve (26), the flow direction of the pumping check valve (26) is one-way from the isolation layer to the pumping pipe (25); the piston box (23) is also communicated with an air outlet check valve (27), the flow direction of the air outlet check valve (27) is one-way from the inside of the piston box (23) to the outside of the piston box (23).

7. The energy-saving steam turbine according to claim 6, characterized in that The heat preservation assembly for reducing steam heat loss comprises a heat preservation cylinder (28) fixedly connected to the top of the fixed box (1), the heat preservation cylinder (28) is located directly above the steam inlet, and the heat preservation cylinder (28) is communicated with a heat preservation pipe, the end of the heat preservation pipe away from the heat preservation cylinder (28) is communicated with the inside of the impeller shell (8).

8. The energy-saving steam turbine according to claim 7, characterized in that The cross-sectional radii of the impeller (20) gradually increase in the direction away from the second steam conveying pipe (17) of the impeller shell (8).

9. The energy-saving steam turbine according to claim 8, characterized in that The one end of the impeller shaft (19) is coaxially fixedly connected with an extension shaft (22), the extension shaft (22) extends through the side wall of the impeller shell (8) and the fixed box (1) to the outside, and the extension shaft (22) is in rotational fit with the side wall of the impeller shell (8) and the side wall of the fixed box (1).

10. The energy-saving steam turbine according to claim 9, characterized in that The rotational fit part of the extension shaft (22) and the side wall of the impeller shell (8) is provided with an oil seal.

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