A hydraulic turbine device based on a detachable modular guide vane structure

Abstract

The present invention discloses a hydraulic turbine device based on a detachable modular guide vane structure. The two ends of the main shaft of the device are sealed and connected to the bearing body, and the feed box body, the water inlet section pump body, the middle end pump body and the water outlet section pump body are sealed and sleeved on the main shaft in sequence; the middle end pump body includes a detachable main pump shell and a secondary pump shell that are arranged alternately, and the main pump shell is also sleeved with a detachable guide vane body as a modular guide vane structure. By providing a plurality of detachable middle section pump shells, the present invention can quickly and conveniently disassemble and install the middle section pump shell according to actual conditions, so that the device can adapt to most different working conditions, improve the adaptability of the hydraulic turbine to the use of the whole machine, and enable the hydraulic turbine to efficiently and economically recover surplus energy. At the same time, in the process of installing and disassembling the middle section pump shell, suitable secondary guide vanes can be selected according to the flow condition range, thereby improving the energy conversion efficiency at the secondary impeller and improving the energy recovery efficiency of the working fluid.

Description

Technical Field

[0001] The present invention relates to a hydraulic turbine device and the technical field of hydraulic turbines, in particular to a hydraulic turbine device based on a detachable modular guide vane structure. Background Art

[0002] A centrifugal pump works by using the rotation of the impeller to cause water to undergo centrifugal motion. Before starting the pump, the pump casing and the suction pipe must be filled with water. Then the motor is started so that the pump shaft drives the impeller and water to rotate at high speed. The water undergoes centrifugal motion and is thrown to the outer edge of the impeller, flowing into the water pressure pipeline of the pump through the flow channel of the volute pump casing.

[0003] The main limitation of multi-stage centrifugal pumps operating in turbine mode is their low efficiency under partial load conditions. Because multi-stage centrifugal pumps must be used in conjunction with units in turbine mode, they often need to cope with different load conditions.

[0004] Traditional multi-stage centrifugal pumps used as reverse turbines cannot adjust the internal structure of the turbine according to the operating conditions, which reduces the efficiency of the hydraulic turbine and the economy of the entire machine under partial load conditions. At the same time, the existing hydraulic turbines are very inconvenient to disassemble and assemble. Most single-stage turbines use embedded replaceable nozzles, but this cannot be achieved in multi-stage turbines. Therefore, it is difficult for existing multi-stage hydraulic turbines to make corresponding adjustments according to different operating conditions. Summary of the Invention

[0005] In order to solve the problems existing in the background technology, the present invention provides a hydraulic turbine device based on a detachable modular guide vane structure.

[0006] The technical solution adopted in the present invention is:

[0007] The hydraulic turbine device based on the detachable modular guide vane structure of the present invention includes a main shaft, a water inlet section pump body, a mid-end pump body, a water outlet section pump body, two bearing bodies, an end cover and a feed box body. The two ends of the main shaft are connected to the two bearing bodies through bearing seals. The feed box body, the water inlet section pump body, the mid-end pump body and the water outlet section pump body are sequentially mounted on the main shaft between the two bearing bodies and are sealed with the two bearing bodies in sequence. The end cover is installed on the bearing body close to the side of the water inlet section pump body and is sealed on one end of the main shaft. The other end of the main shaft is synchronously connected to an external mechanical device, such as a centrifugal pump. The mid-end pump body includes several detachable main pump casings and secondary pump casings that are arranged alternately. The main pump casing is also equipped with a detachable guide vane body as a modular guide vane structure. The water inlet section pump body and the water outlet section pump body are connected to the interior of each main pump casing and secondary pump casing of the mid-end pump body.

[0008] The water inlet section pump body, two bearing bodies and the feed box body are all mounted on the main shaft through the bearing sleeve; the feed box body is sealed and connected between the water outlet section pump body and a bearing body to close the gap between the water outlet section pump body and the main shaft; a balance ring is provided on the inner ring surface of the water outlet section pump body, and a balance ring sleeve is provided at the gap between the inner wall of the balance ring and the water outlet section pump body, and the water outlet section pump body is mounted on the main shaft through the balance ring sleeve.

[0009] The mid-end pump body also includes a first-stage impeller, several secondary impellers and several guide vanes. The first-stage impeller and each secondary impeller are evenly spaced between the water inlet section pump body and the water outlet section pump body, and the inner side surface of the central axis is coaxial and synchronously sleeved on the main shaft. The blades of the first-stage impeller are close to the side of the water outlet section pump body and are sealed with the water inlet section pump body through a sealing ring. The main pump casing is composed of two first semicircular volutes with the same structure to form an overall bottle cap structure with the openings facing the same direction. A through hole is opened in the center of the inner bottom surface of the main pump casing; each guide vane body is composed of two semicircular guide vanes with the same structure The semicircular guide vanes of each guide vane body are coaxially sleeved in the cavity of the first semicircular volute of each main pump casing, and the connection between the two semicircular guide vanes is flush with the connection between the two first semicircular volutes; the outer peripheral surface of the guide vane body contacts the inner peripheral surface of the cavity of the main pump casing, and the inner peripheral surface of each guide vane body is coaxially sleeved on the outer side surface of the central axis of each secondary impeller and connects the secondary impeller connected to itself and the adjacent secondary impeller. Each guide vane body is located between the inner bottom surface of the main pump casing where it is located and the impeller of the adjacent secondary impeller; close to the first stage The central through hole of the first main pump casing of the impeller is sealed on the outer side of the central axis of the first-stage impeller through a sealing ring. The blades of the first-stage impeller are located between the first main pump casing and the water inlet pump body. The central through hole of each of the remaining main pump casings is connected to the outer side of the central axis of the previous secondary impeller adjacent to the guide vane body in its own cavity through a sealing ring. The outer side of the central axis of a secondary impeller close to the water outlet pump body is connected to the center of the water outlet pump body through a sealing ring, and the blades are located between the last main pump casing and the water outlet pump body; each secondary pump casing consists of two second half The circular volute constitutes an overall annular structure, and each second semicircular volute seal is coaxially connected between two adjacent first semicircular volutes, wherein the second semicircular volute of one secondary pump casing is coaxially connected to the water outlet section pump body and an adjacent first semicircular volute, and wherein the second semicircular volute of another secondary pump casing is coaxially connected to the water inlet section pump body and an adjacent first semicircular volute; water flows in from the water inlet of the water inlet section pump body, passes through the first-stage impeller, the secondary impellers and guide vanes set in the center of each main pump casing in turn, and then flows to the water outlet of the water outlet section pump body and flows out.

[0010] Annular grooves are provided on both sides of the outer side surface of the first semicircular volute of each main pump casing, and the second semicircular volute of each secondary pump casing is sealed and sleeved in the annular grooves of two adjacent first semicircular volutes. An annular groove is provided on the side of the water outlet section pump body and the water inlet section pump body close to their respective first semicircular volutes, one of the second semicircular volutes is sealed and sleeved in the annular groove of the water outlet section pump body and its adjacent first semicircular volute, and the other second semicircular volute is sealed and sleeved in the annular groove of the water inlet section pump body and its adjacent first semicircular volute.

[0011] The annular groove of the first semicircular volute is a stepped annular groove, the second semicircular volute is a stepped annular structure, the cross section of the first semicircular volute is trapezoidal, and the second semicircular volute is sealed and crimped in the stepped annular grooves of two adjacent first semicircular volutes.

[0012] Each of the secondary pump casings also includes two connecting blocks, which are connected at the two contact positions of the two second semicircular volutes of each secondary pump casing, and the symmetrical two sides of each connecting block are respectively connected to the contact positions of the two first semicircular volutes of the two adjacent main pump casings of each secondary pump casing, so that each first semicircular volute and the second semicircular volute are sealed and connected; the two semicircular guide vanes of each guide vane body are respectively mounted in the cavities of the two first semicircular volutes of each main pump casing, and when each semicircular guide vane is disassembled, it is removed from the mid-end pump body together with its own first semicircular volute and replaced.

[0013] Threaded holes are provided on the surfaces of the two connecting blocks, and bolts for connecting and fixing the two connecting blocks are threadedly connected to the inner walls of the threaded holes.

[0014] The guide vane body is a flow channel guide vane, and one side surface of the guide vane body is provided with inlet guide vanes of preset curvature at evenly spaced intervals along the circumference, and each inlet guide vane is located on a side facing the inner bottom surface of the main pump casing, and the other side surface of the guide vane body is provided with outlet guide vanes of preset curvature at evenly spaced intervals along the circumference, and the two ends of each outlet guide vane are respectively an outlet guide vane inlet and an outlet guide vane outlet, and the end of each inlet guide vane away from the center of the guide vane body is located at the outlet guide vane inlet position of the outlet guide vane, and the other end of each inlet guide vane is close to the center of the guide vane body; when the main shaft rotates to drive the first-stage impeller and each secondary impeller to rotate, the inlet guide vane guides the liquid flowing in through the first-stage impeller or the secondary impeller from the center of the guide vane body to the outlet guide vane inlet position of the outlet guide vane and flows through the outlet guide vane, and the outlet guide vane guides the liquid flowing out through the secondary impeller to the outlet guide vane outlet of the inlet guide vane and circulates to the next adjacent secondary impeller.

[0015] The forward and reverse guide vanes of the channel-type guide vanes are cast together, creating a continuous flow channel between them. This allows the liquid to flow smoothly, preventing dead spots and sudden diffusion. Velocity changes are more uniform, resulting in better hydraulic performance. When the guide vane body is replaced, the inlet and outlet guide vanes can be replaced with different radians to meet the needs of different operating conditions.

[0016] The beneficial effects of the present invention are:

[0017] 1. The present invention provides a plurality of detachable mid-section pump secondary pump casings, thereby being able to disassemble the mid-section pump casing main pump casing with secondary guide vanes fixed thereto, so that during the actual operation of the centrifugal pump, the type of assembled guide vanes can be selected according to actual conditions, and the mid-section pump casing can be quickly and conveniently disassembled and installed, so that the device can adapt to most different working conditions, improve the adaptability of the hydraulic turbine and the use of the whole machine, and enable the hydraulic turbine to efficiently and economically recover surplus energy. At the same time, during the process of installing and disassembling the mid-section pump casing, a suitable secondary impeller can be selected according to the flow operating range, and the guide vane opening of each stage can be adjusted according to a certain coefficient, thereby improving the energy conversion efficiency at the secondary impeller and improving the energy recovery efficiency of the working fluid.

[0018] 2. The present invention provides a plurality of detachable mid-section pump secondary pump casings, so that the purpose of accurately disassembling a certain level of pump casing can be achieved by disassembling two secondary pump casings adjacent to a certain mid-section pump casing main pump casing without disassembling the entire mid-section pump casing. The guide vanes of a certain level can be adjusted quickly and conveniently according to actual conditions. At the same time, when a guide vane is damaged, the guide vane can be accurately disassembled along with the mid-section pump casing main pump casing, making the use of the hydraulic turbine more convenient and quick. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of the three-dimensional structure of the device of the present invention;

[0020] Figure 2 Schematic diagram of the cross-sectional structure of the device of the present invention;

[0021] Figure 3 This is an enlarged structural diagram of point A in the cross-sectional structure of the device of the present invention;

[0022] Figure 4 It is a schematic diagram of the enlarged structure of point B in the three-dimensional structure of the device of the present invention;

[0023] Figure 5 Schematic diagram of the semicircular volute structure of the main pump housing of the device of the present invention;

[0024] Figure 6 Schematic diagram of the structure of the guide vane of the device of the present invention, wherein: Figure 6 (a) is a schematic diagram of the structure of one side of the guide vane of the present invention, Figure 6(b) is a schematic structural diagram of the other side of the guide vane of the present invention;

[0025] Figure 7 Schematic diagram of the assembly of the guide vanes and impeller of the device of the present invention;

[0026] In the figure: 200, main shaft, 300, water inlet section pump body, 400, middle end pump body, 401, first stage impeller, 402, secondary impeller, 403, main pump casing, 40301, first semicircular volute, 404, secondary pump casing, 40401, second semicircular volute, 40402, connecting block, 405, inlet guide vane, 406, outlet guide vane, 40601, outlet guide vane inlet, 40602, outlet guide vane outlet, 407, sealing ring, 500, water outlet section pump body, 600, bearing body, 700, end cover, 800, feed box body. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] like Figure 1 As shown, the hydraulic turbine device based on the detachable modular guide vane structure includes a main shaft 200, a water inlet pump body 300, a middle pump body 400, a water outlet pump body 500, two bearing bodies 600, an end cover 700 and a feed box body 800. The two ends of the main shaft 200 are connected to the two bearing bodies 600 through bearing seals. The feed box body 800, the water inlet pump body 300, the middle pump body 400 and the water outlet pump body 500 are sequentially mounted on the main shaft 200 between the two bearing bodies 600 and are sealed and connected to the two bearing bodies 600 in sequence. The cover 700 is installed on the bearing body 600 on the side close to the water inlet section pump body 300 and sealed on one end of the main shaft 200. The other end of the main shaft 200 is synchronously connected to an external mechanical device, such as a centrifugal pump. The middle-end pump body 400 includes several detachable main pump casings 403 and secondary pump casings 404 that are alternately arranged. The main pump casing 403 is also equipped with a detachable guide vane body as a modular guide vane structure. The water inlet section pump body 300 and the water outlet section pump body 500 are connected to the interior of each main pump casing 403 and secondary pump casing 404 of the middle-end pump body 400.

[0029] The water inlet section pump body 300, two bearing bodies 600 and the feed box body 800 are all mounted on the main shaft 200 through the bearing sleeve; the feed box body 800 is sealed between the water outlet section pump body 500 and a bearing body 600, and is used to close the gap between the water outlet section pump body 500 and the main shaft 200; the inner ring surface of the water outlet section pump body 500 is provided with a balance ring, and a balance ring sleeve is provided at the gap between the inner wall of the balance ring and the water outlet section pump body 500, and the water outlet section pump body 500 is mounted on the main shaft 200 through the balance ring sleeve.

[0030] The inner annular surface of the outlet pump body 500 is provided with a balancing ring, and a balancing ring sleeve is provided in the gap between the inner wall of the balancing ring and the outlet pump body 500. The provision of the balancing ring effectively ensures the overall stability of the device during operation and prevents the main shaft 200 from shaking or deviating. The inner walls of the inlet pump body 300 and the outlet pump body 500 are both rotatably connected to the outer surface of the main shaft 200 via bearing sleeves. The provision of the bearing sleeve effectively ensures the sealing between the inlet pump body 300, the outlet pump body 500 and the main shaft 200, as well as the characteristic of flexible rotation. The ends of the inlet pump body 300 and the outlet pump body 500 are both connected to a bearing body 600 via a bearing seal. The end of the bearing body 600 at the end of the outlet pump body 500 is provided with an end cap 700. The provision of the bearing body 600 facilitates effective support of the ends of the inlet pump body 300 and the outlet pump body 500, further ensuring the stability of the device during operation. A feeder box 800 is provided between the outlet pump body 500 and the bearing body 600 of the outlet pump body 500, which is used to close the gap between the outlet pump body 500 and the main shaft 200. The provision of the feeder box 800 effectively seals the gap between the outlet pump body 500 and the main shaft 200, preventing energy loss.

[0031] like Figure 2 、 Figure 3 and Figure 5As shown, the middle end pump body 400 also includes a first-stage impeller 401, several secondary impellers 402 and several guide vanes. The first-stage impeller 401 and each secondary impeller 402 are evenly spaced in sequence between the water inlet section pump body 300 and the water outlet section pump body 500, and the inner side surface of the central axis is coaxial and synchronously sleeved on the main shaft 200. The blades of the first-stage impeller 401 are close to the side of the water outlet section pump body 500 and are sealed with the water inlet section pump body 300 through a sealing ring. The main pump casing 403 is composed of two first semicircular volutes 40301 with the same structure to form an integral bottle cap structure with the openings facing the same direction. A through hole is opened in the center of the inner bottom surface of the main pump casing 403; each guide vane body is composed of two semicircular guide vanes with the same structure. The semicircular guide vanes of each guide vane body are coaxially mounted in the cavity of the first semicircular volute 40301 of each main pump casing 403, and the junction of the two semicircular guide vanes is flush with the junction of the two first semicircular volutes 40301; the outer peripheral surface of the guide vane body contacts the inner peripheral surface of the cavity of the main pump casing 403, and the inner peripheral surface of each guide vane body is coaxially mounted on the outer side surface of the central axis of each secondary impeller 402 and connects the secondary impeller 402 connected to itself and the adjacent secondary impeller 402, and each guide vane body is located between the inner bottom surface of the main pump casing 403 where it is located and the impeller of the adjacent secondary impeller 402; the center of the first main pump casing 403 close to the first-stage impeller 401 is connected to the impeller 402. The hole is sealed on the outer side of the central axis of the first-stage impeller 401 through a sealing ring 407. The blades of the first-stage impeller 401 are located between the first main pump casing 403 and the water inlet section pump body 300. The central through hole of each of the remaining main pump casings 403 is connected to the outer side of the central axis of the previous secondary impeller 402 adjacent to the guide vane body in its own cavity through a sealing ring 407. The outer side of the central axis of a secondary impeller 402 close to the water outlet section pump body 500 is connected to the center of the water outlet section pump body 500 through a sealing ring 407, and the blades are located between the last main pump casing 403 and the water outlet section pump body 500; each secondary pump casing 404 is composed of two second semicircular volute casings 40401 with the same structure to form an integral ring. The pump has a shaped structure, with each second semicircular volute 40401 coaxially and hermetically connected between two adjacent first semicircular volutes 40301. The second semicircular volute 40401 of one secondary pump casing 404 is coaxially and hermetically connected to the outlet pump body 500 and its adjacent first semicircular volute 40301, while the second semicircular volute 40401 of another secondary pump casing 404 is coaxially and hermetically connected to the inlet pump body 300 and its adjacent first semicircular volute 40301. Water flows into the inlet of the inlet pump body 300, passes through the primary impeller 401, the secondary impeller 402 and the guide vanes in the center of each main pump casing 403, and then flows out of the outlet of the outlet pump body 500. The provision of the sealing ring 407 effectively ensures the tightness of the connection between the main pump casing 403 and the secondary impeller 402 after installation.

[0032] Annular grooves are provided on both sides of the outer side surface of the first semicircular volute 40301 of each main pump casing 403, and the second semicircular volute 40401 of each secondary pump casing 404 is sealed and sleeved in the annular grooves of two adjacent first semicircular volutes 40301. The outlet section pump body 500 and the inlet section pump body 300 are both provided with annular grooves on one side close to their respective first semicircular volutes 40301, one of the second semicircular volutes 40401 is sealed and sleeved in the annular grooves of the outlet section pump body 500 and its adjacent first semicircular volute 40301, and the other second semicircular volute 40401 is sealed and sleeved in the annular grooves of the inlet section pump body 300 and its adjacent first semicircular volute 40301. The annular groove of the first semicircular volute 40301 is a stepped annular groove, the second semicircular volute 40401 is a stepped annular structure, the cross-section of the first semicircular volute 40301 is trapezoidal, and the second semicircular volute 40401 is sealed and crimped in the stepped annular grooves of two adjacent first semicircular volutes 40301.

[0033] like Figure 4 As shown, each secondary pump casing 404 also includes two connecting blocks 40402, and the two connecting blocks 40402 are connected at two contact positions of the two second semicircular volute casings 40401 of each secondary pump casing 404, and the symmetrical two sides of each connecting block 40402 are respectively connected to the contact positions of the two first semicircular volute casings 40301 of the two adjacent main pump casings 403 of each secondary pump casing 404, so that each first semicircular volute casing 40301 and the second semicircular volute casing 40401 are sealed and connected; the two semicircular guide vanes of each guide vane body are respectively mounted in the cavity of the two first semicircular volute casings 40301 of each main pump casing 403, and when each semicircular guide vane is disassembled, it is removed from the mid-end pump body 400 together with its own first semicircular volute casing 40301 and replaced.

[0034] Threaded holes are provided on the surfaces of the two connecting blocks 40402, and the inner walls of the threaded holes are threadedly connected with bolts for connecting and fixing the two connecting blocks 40402. The setting of the connecting blocks 40402 and the bolts can realize the rapid installation and disassembly of the two semicircular volute casings 40401, wherein the width of the connecting block 40402 is greater than the width of the secondary pump casing 404, so that after the two connecting blocks 40402 are connected by bolts, the connecting block 40402 can fix the two main pump casings 403 adjacent to the secondary pump casing 404.

[0035] like Figure 6 (a) Figure 6 (b) and Figure 7As shown, the guide vane body is a flow channel guide vane, and one side of the guide vane body is evenly spaced along the circumference with inlet guide vanes 405 of preset curvature, and one side of each inlet guide vane 405 faces the inner bottom surface of the main pump housing 403, and the other side of the guide vane body is evenly spaced along the circumference with outlet guide vanes 406 of preset curvature, and the two ends of each outlet guide vane 406 are outlet guide vane inlet 40601 and outlet guide vane outlet 40602 respectively, and the end of each inlet guide vane 405 away from the center of the guide vane body is located at the outlet guide vane inlet 40601 position of the outlet guide vane 406, and each inlet The other end of the guide vane 405 is close to the center of the guide vane body; when the main shaft 22 rotates to drive the first-stage impeller 401 and each secondary impeller 402 to rotate, the inlet guide vane 405 guides the liquid flowing in through the first-stage impeller 401 or the secondary impeller 402 from the center of the guide vane body to the outlet guide vane inlet 40601 position of the outlet guide vane 406 and flows through the outlet guide vane 406, and the outlet guide vane 406 guides the liquid flowing out through the secondary impeller 402 to the outlet guide vane outlet 40602 of the inlet guide vane 405 and circulates to the next adjacent secondary impeller 402.

[0036] The forward and reverse guide vanes of the channel-type guide vanes are cast together, creating a continuous flow channel between them. This allows the liquid to flow smoothly within the channel, preventing dead spots and sudden diffusion. Velocity changes are relatively uniform, resulting in better hydraulic performance. When replacing the guide vane body, the inlet guide vanes 405 and outlet guide vanes 406 can be replaced with different curvatures to meet the needs of different operating conditions.

[0037] The present invention provides a plurality of detachable main pump casings 403, secondary pump casings 404 and guide vane bodies, so that during the actual operation of the centrifugal pump, the type of guide vanes to be assembled can be selected according to actual conditions, and the main pump casing 403 and the secondary pump casing 404 can be quickly and conveniently disassembled and installed, and a certain level of pump casing can be accurately disassembled, so that the device can adapt to most different working conditions, improve the adaptability of the hydraulic turbine to the use of the whole machine, and enable the hydraulic turbine to efficiently and economically recover surplus energy. At the same time, during the installation and disassembly of the main pump casing 403, the appropriate secondary impeller 402 can be selected according to the flow operating range, and the flow rate can be adjusted according to a certain coefficient. The inlet guide vanes 405 and the outlet guide vanes 406 of each stage are adjusted, thereby improving the energy conversion efficiency at the secondary impeller 402 and the energy recovery efficiency of the working fluid. In addition, in the technical solution proposed by the present invention, a secondary pump casing 404 is arranged adjacent to the main pump casing 403. By disassembling two secondary pump casings 404 adjacent to a certain main pump casing 403, the purpose of accurately disassembling a certain stage of the pump casing can be achieved without disassembling the entire middle pump casing. According to actual conditions, the guide vanes of a certain stage can be adjusted quickly and conveniently. At the same time, when a guide vane is damaged, the guide vane can be accurately disassembled along with the main pump casing 403, making it more convenient and quick to use the hydraulic turbine.

[0038] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A hydraulic turbine device based on a detachable modular guide vane structure, characterized in that: The pump comprises a main shaft (200), a water inlet section pump body (300), a middle end pump body (400), a water outlet section pump body (500), two bearing bodies (600), an end cover (700) and a feed box body (800). Both ends of the main shaft (200) are connected to the two bearing bodies (600) through bearing seals. The feed box body (800), the water inlet section pump body (300), the middle end pump body (400) and the water outlet section pump body (500) are sequentially sleeved on the main shaft (200) between the two bearing bodies (600) and are sequentially sealed and connected to the two bearing bodies (600). The end cover (700) The bearing body (600) is mounted on a side of the water inlet section pump body (300) and sealed on one end of the main shaft (200), and the other end of the main shaft (200) is synchronously connected to an external mechanical device; the middle end pump body (400) includes a plurality of detachable main pump shells (403) and secondary pump shells (404) arranged alternately, and the main pump shell (403) is also equipped with a detachable guide vane body as a modular guide vane structure; the water inlet section pump body (300) and the water outlet section pump body (500) are connected to the interior of each main pump shell (403) and secondary pump shell (404) of the middle end pump body (400); The mid-end pump body (400) further comprises a first-stage impeller (401), a plurality of secondary impellers (402) and a plurality of guide vanes. The first-stage impeller (401) and the secondary impellers (402) are arranged in sequence and evenly spaced between the water inlet section pump body (300) and the water outlet section pump body (500), and the inner side surfaces of the central axes are coaxial and synchronously sleeved on the main shaft (200). The blades of the first-stage impeller (401) are close to the side surface of the water outlet section pump body (500) and are sealed with the water inlet section pump body (300) through a sealing ring. The main pump housing (403) is composed of two first semicircular volutes (40301) of the same structure to form an integral bottle cap-shaped structure with openings facing the same direction. A through hole is provided at the center of the inner bottom surface of the main pump housing (403). Each guide vane body is composed of two semicircular guide vanes of the same structure. The semicircular guide vanes of each guide vane body are coaxially sleeved in the cavity of the first semicircular volute (40301) of a respective main pump housing (403). The outer peripheral surface of the guide vane body contacts the inner peripheral surface of the cavity of the main pump housing (403). The inner peripheral surface of each guide vane body is coaxially sleeved on the outer side surface of the central axis of a respective secondary impeller (402) and connects the secondary impeller (402) connected to itself and an adjacent secondary impeller (402). The central through hole of the first main pump housing (403) close to the first-stage impeller (401) is sealed and sleeved on the outer side surface of the central axis of the first-stage impeller (401) through a sealing ring (407). The blade position of the first-stage impeller (401) is The central through hole of each of the remaining main pump casings (403) is connected to the outer side surface of the central axis of the previous secondary impeller (402) adjacent to the guide vane body in its own cavity through a sealing ring (407); the outer side surface of the central axis of a secondary impeller (402) close to the outlet pump body (500) is connected to the center of the outlet pump body (500) through a sealing ring (407), and the impeller is located between the last main pump casing (403) and the outlet pump body (500); each secondary pump casing (404) is composed of two second semicircular volutes (40401) with the same structure to form an overall annular structure, and each second semicircular volute (40401) seals the same The shaft is connected between two adjacent first semicircular volutes (40301), wherein the second semicircular volute (40401) of one secondary pump casing (404) is sealed and coaxially connected to the water outlet section pump body (500) and an adjacent first semicircular volute (40301), and the second semicircular volute (40401) of another secondary pump casing (404) is sealed and coaxially connected to the water inlet section pump body (300) and an adjacent first semicircular volute (40301); water flows in from the water inlet of the water inlet section pump body (300), passes through the first-stage impeller (401), the secondary impellers (402) and the guide vanes of each main pump casing (403) in sequence, and then flows to the water outlet of the water outlet section pump body (500) and flows out.

2. The hydraulic turbine device based on the detachable modular guide vane structure according to claim 1 is characterized in that: Annular grooves are provided on both sides of the outer side surface of the first semicircular volute (40301) of each main pump housing (403), and the second semicircular volute (40401) of each secondary pump housing (404) is sealed and sleeved in the annular grooves of two adjacent first semicircular volutes (40301). An annular groove is provided on one side of the outlet section pump body (500) and the inlet section pump body (300) close to their respective first semicircular volutes (40301), one of the second semicircular volutes (40401) is sealed and sleeved in the annular grooves of the outlet section pump body (500) and its adjacent first semicircular volute (40301), and the other second semicircular volute (40401) is sealed and sleeved in the annular grooves of the inlet section pump body (300) and its adjacent first semicircular volute (40301).

3. The hydraulic turbine device based on a detachable modular guide vane structure according to claim 1, characterized in that: Each secondary pump casing (404) further comprises two connecting blocks (40402), the two connecting blocks (40402) being connected at two contact positions of the two second semicircular volutes (40401) of a respective secondary pump casing (404), and the symmetrical two sides of each connecting block (40402) being respectively connected at contact positions of the two first semicircular volutes (40301) of the two adjacent main pump casings (403) of a respective secondary pump casing (404), so that each first semicircular volute (40301) and the second semicircular volute (40401) are sealed and connected; the two semicircular guide vanes of each guide vane body are respectively sleeved in the cavity of the two first semicircular volutes (40301) of a respective main pump casing (403), and when each semicircular guide vane is disassembled, it is removed from the mid-end pump body (400) together with the respective first semicircular volute (40301) and replaced.

4. The hydraulic turbine device based on a detachable modular guide vane structure according to claim 1, characterized in that: The guide vane body is a flow channel guide vane, and an inlet guide vane (405) with a preset curvature is evenly spaced along the circumference on one side of the guide vane body. The side where each inlet guide vane (405) is located faces the inner bottom surface of the main pump housing (403). An outlet guide vane (406) with a preset curvature is evenly spaced along the circumference on the other side of the guide vane body. The two ends of each outlet guide vane (406) are an outlet guide vane inlet (40601) and an outlet guide vane outlet (40602). The end of each inlet guide vane (405) away from the center of the guide vane body is located at the outlet guide vane inlet (40601) of the outlet guide vane (406). Each inlet guide vane (406) is located at the outlet guide vane inlet (40601) of the outlet guide vane (406). 5) is close to the center of the guide vane body; when the main shaft (200) rotates to drive the first-stage impeller (401) and each secondary impeller (402) to rotate, the inlet guide vane (405) guides the liquid flowing in through the first-stage impeller (401) or the secondary impeller (402) from the center of the guide vane body to the outlet guide vane inlet (40601) position of the outlet guide vane (406) and flows through the outlet guide vane (406), and the outlet guide vane (406) guides the liquid flowing out through the secondary impeller (402) to the outlet guide vane outlet (40602) of the inlet guide vane (405) and circulates to the next adjacent secondary impeller (402).

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