Bulb tubular hydraulic generator and ventilation cooling structure thereof

Abstract

The utility model relates to a bulb tubular hydraulic generator and a ventilation cooling structure thereof. The ventilation cooling structure of the bulb tubular hydraulic generator comprises a bulb head, a stator base, a stator core, a rotor bracket, a rotor magnetic pole, a cooler, a plurality of fans, a plurality of air ducts and an air isolation structure. The cooler is arranged on the upstream side in the bulb head, and the multiple fans and the multiple air guide barrels are dispersedly arranged on the downstream side in the bulb head in a one-to-one correspondence mode and are arranged opposite to the cooler, so that the occupied space of the ventilation cooling structure of the bulb tubular hydraulic generator in the bulb head is reduced, and the spacious installation and maintenance space is guaranteed; even in small and medium-sized bulb tubular hydraulic generators with smaller sizes and spaces, the arrangement and installation of the ventilation cooling structure are easier to implement; therefore, the ventilation cooling structure of the bulb tubular hydraulic generator solves the problems that ventilation arrangement of small and medium-sized bulb tubular hydraulic generators is difficult, installation and maintenance space is small and daily maintenance is difficult.

Description

Technical Field

[0001] The utility model relates to the technical field of ventilation and cooling of water turbine generators, in particular to a bulb tubular water turbine generator and a ventilation and cooling structure thereof. Background Art

[0002] The ventilation cooling structure of the existing bulb-type hydro-generator generally adopts a multi-branch closed cooling method. Figure 1 and Figure 2 As shown, multiple fans 03 and coolers 04 are distributed along the circumferential direction at the upstream side of the generator bubble head 01 near the stator 02, and each fan 03 corresponds to the cooler 04 one by one. The cold air coming out of each cooler 04 enters the upstream side of the stator 02, flows along the axial air duct of the stator 02, the air gap between the stator 02 and the rotor 05, and the rotor inter-pole air duct, cools the stator 02 and the rotor 05, and then enters the downstream side of the stator 02 and the rotor 05, and forms hot air. The hot air returns to the upstream side of the stator 02 and the rotor 05 through the ventilation holes of the rotor bracket 06, and is pressed into the cooler 04 through the air guide tubes 07 of each branch under the action of the fans of each branch, so that the hot air exchanges heat with the cooling water of the cooler 04, thereby converting the hot air into cold air again, and then cools the unit through the air outlet of the cooler 04 to form a heat exchange cycle.

[0003] This cooling method requires the fan 03, cooler 04, and air guide tube 07 to be installed on the bubble head 01. At the same time, the cooler 04 needs to be equipped with cooling water pipes 08, flanges 09, valves and other equipment, which takes up most of the space inside the bubble head. The space dimensions of small and medium-sized bulb tubular turbine generators are usually small. Once the cooling equipment is arranged, the operating space inside the bubble head will be greatly compressed, making it impossible to carry out related installation and maintenance work, or even impossible to arrange it according to this arrangement. Therefore, the ventilation and cooling structure of traditional small and medium-sized bulb tubular turbine generators is difficult to arrange using a multi-branch closed ventilation structure due to the small frame size and limited internal space of small and medium-sized bulb tubular turbine generators. In addition, the complex arrangement of pipes and equipment occupies installation and maintenance space, making daily maintenance of the unit difficult. Summary of the Invention

[0004] Based on this, it is necessary to provide a bulb tubular turbine generator and its ventilation and cooling structure that can solve the problems of difficult ventilation arrangement, small installation and maintenance space and difficult daily maintenance of small and medium-sized bulb tubular turbine generators.

[0005] A ventilation and cooling structure for a bulb-type tubular hydro-generator, comprising:

[0006] The bulb head has an upstream side and a downstream side opposite to each other; a bulb head pedal is transversely arranged in the bulb head to form a silo inspection chamber and a hot air passage chamber arranged vertically in the bulb head; the hot air passage chamber and the silo inspection chamber are connected at one end close to the upstream side;

[0007] a stator frame mounted on the downstream end of the bulb head;

[0008] An air-isolating structure is provided at one end of the stator base near the bulb head; a plurality of cold air holes are formed at an edge of the air-isolating structure at intervals along the circumference of the stator base; a hot air hole is formed at a position of the air-isolating structure opposite to the hot air passage cavity;

[0009] A stator core is installed in the stator frame and is located on a side of the wind-shielding structure away from the bulb head;

[0010] A rotor bracket, used for being mounted on the main shaft and located inside the stator core;

[0011] A rotor pole, mounted on the rotor bracket and located between the stator core and the rotor bracket;

[0012] The cooler is installed inside the bulb head near the upstream side;

[0013] A plurality of fans are installed at intervals along the circumference of the stator core at positions of the bulb head close to the stator core; the air outlets of the plurality of fans are connected to the plurality of cold air holes in a one-to-one correspondence;

[0014] Multiple air guide tubes have one end that is connected to the air inlets of the multiple fans in a one-to-one correspondence, and the openings at the other end are connected to the warehouse maintenance cavity.

[0015] In one embodiment, there are multiple coolers; the multiple coolers are arranged at intervals along a direction intersecting the central axis of the stator core.

[0016] In one embodiment, the system further comprises a cooling pipeline and a return pipeline; the cooling pipeline comprises a cooling main pipe and a plurality of cooling branch pipes; one end of the cooling main pipe is connected to the plurality of cooling branch pipes respectively; and one end of the plurality of cooling branch pipes, which is away from the cooling main pipe, is connected to the inlets of the plurality of coolers in a one-to-one correspondence.

[0017] The reflux pipeline includes a reflux main pipe and multiple reflux branch pipes; one end of the reflux main pipe is connected to the multiple reflux branch pipes; one end of the multiple reflux branch pipes away from the reflux main pipe is connected to the outlets of the multiple coolers in a one-to-one correspondence.

[0018] In one embodiment, a mounting plate is vertically arranged inside the bulb head; the mounting plate and the bubble head pedal divide the space inside the bulb head into a gas reflux chamber, the bin body inspection chamber and the hot air passing chamber; the gas reflux chamber is located at one end of the bin body inspection chamber and the hot air passing chamber close to the upstream side; a first air hole connecting the gas reflux chamber and the bin body inspection chamber and a second air hole connecting the gas reflux chamber and the hot air passing chamber are formed on the mounting plate; the cooler is mounted on the mounting plate and is at least partially aligned with the first air hole.

[0019] In one embodiment, the bulb head includes a conical cylinder and a hemispherical shell; the open end of the hemispherical shell and the small end of the conical cylinder are detachably connected to two sides of the mounting plate respectively.

[0020] In one embodiment, a mounting hole is provided on the bubble head pedal to connect the bin inspection cavity and the hot air passage cavity; part of the plurality of fans is located in the bin inspection cavity, and the rest is located in the hot air passage cavity;

[0021] The multiple air ducts include at least one first air duct and multiple second air ducts; one end of the first air duct is connected to the mounting hole, and the other end is connected to the air inlet corresponding to the fan located in the hot air passage cavity; one end of the multiple second air ducts is respectively connected to the multiple fans located in the warehouse inspection cavity.

[0022] In one embodiment, the second air duct includes a straight pipe section and a bent pipe section connected to the straight pipe section at one end; the end of the straight pipe section away from the bent pipe section is connected to the air inlet corresponding to the fan located in the hot air passage cavity; the end of the bent pipe section away from the straight pipe section is connected to the mounting hole.

[0023] A bulb tubular hydro-turbine generator comprises the ventilation and cooling structure of the bulb tubular hydro-turbine generator described above.

[0024] The above-mentioned bulb-type cross-flow turbine generator and its ventilation and cooling structure arrange the cooler on the upstream side of the bulb head, and arrange multiple fans and multiple air guide tubes in a one-to-one distributed manner on the downstream side of the bulb head and arranged opposite to the cooler, so as to reduce the space occupied by the ventilation and cooling structure of the bulb-type cross-flow turbine generator in the bulb head and ensure spacious installation and maintenance space. Even in small and medium-sized bulb-type cross-flow turbine generators with smaller size and space, the arrangement and installation of the ventilation and cooling structure are easier to implement. Therefore, the above-mentioned ventilation and cooling structure of the bulb-type cross-flow turbine generator solves the problems of difficult ventilation arrangement, small installation and maintenance space and difficult daily maintenance of small and medium-sized bulb-type cross-flow turbine generators. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the ventilation and cooling structure of a conventional bulb-type tubular turbine generator in the background technology of the present utility model;

[0026] Figure 2 for Figure 1 A side view of a conventional bulb-type tubular turbine generator ventilation and cooling structure is shown;

[0027] Figure 3 This is a structural diagram of the ventilation and cooling structure of the bulb tubular hydro-generator in a preferred embodiment of the present utility model;

[0028] Figure 4 for Figure 3 The schematic diagram of the structure of the bulb head in the ventilation and cooling structure of the bulb tubular turbine generator shown;

[0029] Figure 5 for Figure 3 The side view of the ventilation and cooling structure of the bulb-type tubular turbine generator is viewed from the inside of the bulb head toward the downstream side.

[0030] Explanation of Reference Numerals: 100, ventilation and cooling structure of bulb-type hydro-generator; 110, bulb head; 111, upstream side; 112, downstream side; 113, bulb pedal; 1131, mounting hole; 114, bin inspection cavity; 115, hot air passage cavity; 116, mounting plate; 1161, first air hole; 1162, second air hole; 117, gas return cavity; 118, conical cylinder; 119, hemispherical shell; 120, stator base; 130, stator core; 140. Rotor bracket; 150. Rotor pole; 160. Cooler; 170. Fan; 180. Air duct; 181. First air duct; 182. Second air duct; 1821. Straight pipe section; 1822. Bent pipe section; 191. Cooling pipeline; 1911. Cooling main pipe; 1912. Cooling branch pipe; 192. Return pipeline; 1921. Return main pipe; 1922. Return branch pipe; 201. Wind-isolating structure; 2011. Cold air hole; 2012. Hot air hole. DETAILED DESCRIPTION

[0031] To facilitate understanding of the present invention, a more comprehensive description of the present invention will be provided below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to facilitate a more thorough and comprehensive understanding of the disclosure of the present invention.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of this invention are for the purpose of describing specific embodiments only and are not intended to limit this invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0033] When describing positional relationships, unless otherwise specified, when an element is referred to as being "on" another element, it can be directly on the other element or intervening elements may also exist. It is also understood that when an element is referred to as being "between" two elements, it can be the only one between the two elements, or one or more intervening elements may also exist.

[0034] In the case of using “including,” “having,” and “comprising” described herein, another component may be added unless a clear limiting term such as “only,” “consisting of,” etc. is used. Unless mentioned otherwise, a term in the singular form may include a plural form and should not be understood as having one number.

[0035] In addition, the drawings are not drawn to a 1:1 scale, and the relative sizes of the elements in the drawings are drawn only as examples and not necessarily according to the true scale.

[0036] The utility model provides a bulb tubular hydro-turbine generator and a ventilation and cooling structure thereof, wherein the bulb tubular hydro-turbine generator comprises a bulb tubular hydro-turbine generator ventilation and cooling structure.

[0037] Figure 3 The structure of the ventilation and cooling structure of the bulb tubular hydro-generator in one embodiment of the present invention is shown. For ease of description, the accompanying drawings only show structures related to the embodiment of the present invention.

[0038] See also Figure 3 The ventilation and cooling structure 100 of the bulb cross-flow turbine generator in the preferred embodiment of the present invention includes a bulb head 110, a stator frame 120, a stator core 130, a rotor bracket 140, a rotor pole 150, a cooler 160, multiple fans 170, multiple air guides 180 and a wind isolation structure 201.

[0039] Please also refer to Figure 4 The bulb head 110 has an upstream side 111 and a downstream side 112 facing each other. A bulb head pedal 113 is disposed transversely within the bulb head 110 to form a vertically arranged chamber 114 and a hot air passage chamber 115 within the bulb head 110. The hot air passage chamber 115 and the chamber 114 are connected at one end near the upstream side 111.

[0040] The stator base 120 is mounted at the downstream end 112 of the bulb holder 110. A windshield 201 is located within the stator base 120, near the bulb holder 110. The windshield 201 is formed with a plurality of cold air holes 2011 spaced circumferentially around the stator base 120, near the inner wall of the stator base 120. Hot air holes 2012 are formed in the windshield 201 opposite the hot air passage 115. The stator core 130 is mounted within the stator base 120, on the side of the windshield 201 facing away from the bulb holder.

[0041] Among them, the wind-isolating structure 201 can be welded inside the stator frame 120, or it can be fixed inside the stator frame 120 by means of threaded connection or other connection methods. Of course, the wind-isolating structure 201 is mainly used to separate cold and hot air, and can be a plate structure made of plate members such as steel plates, or a combined structure composed of rods (such as I-beams, U-shaped steels, etc.) and plates (such as steel plates, alloy plates, etc.). The rotor bracket 140 is used to be installed on the main shaft and is located inside the stator core 130. The rotor pole 150 is installed on the rotor bracket 140 and is located between the stator core 130 and the rotor bracket 140. The rotor bracket 140 and the rotor pole 150 are both located on the side of the wind-isolating structure 201 facing away from the bulb head 110.

[0042] The cooler 160 is installed in the warehouse inspection cavity 114 near the upstream side 111. The cooler 160 can be an air cooler, a liquid cooler, etc., as long as the cold fluid in the cooler 160 can remove the heat of the hot air in the bulb head 110.

[0043] A plurality of fans 170 are installed at intervals along the circumference of the stator core 130 at positions of the bulb head 110 close to the stator core 130. The air outlets of the plurality of fans 170 are connected to the plurality of cold air holes 2011 in a one-to-one correspondence.

[0044] One ends of the plurality of air guide tubes 180 are connected to the air inlets of the plurality of fans 170 in a one-to-one correspondence, and the openings of the other ends are connected to the warehouse maintenance cavity 114.

[0045] In actual use, under the action of the fan 170, a flowing airflow is formed in the bulb head 110 and the stator base 120. Figure 1As shown, the solid arrows indicate the direction of cold air flow, and the dotted arrows indicate the direction of hot air flow, that is, the cold air coming out after heat exchange through the cooler 160 flows through the warehouse inspection chamber 114, the air guide tube 180, the fan 170, the cold air hole 2011, and the side of the stator core 130 facing the bulb head 110 in sequence under the action of the fan 170, and takes away the heat generated by the stator core 130 and the rotor pole 150 when passing through the stator core 130 and the rotor pole 150, so as to form hot air on the side of the stator core 130 facing away from the bulb head 110, and the hot air flows through the ventilation holes of the rotor bracket 140, the space between the wind shielding structure 201 and the rotor bracket 140, the hot air hole 2012, and the hot air enters the side of the cooler 160 facing the upstream side 111 through the cavity 115. After the hot air flows through the cooler 160, the temperature is reduced to form cold air on the side of the cooler 160 facing the downstream side 112.

[0046] The above-mentioned ventilation and cooling structure 100 of the bulb cross-flow type hydro-turbine generator arranges the cooler 160 on the upstream side 111 in the bulb head 110, and arranges multiple fans 170 and multiple air guide tubes 180 in a one-to-one distributed manner on the downstream side 112 in the bulb head 110, and is arranged opposite to the cooler 160, which greatly reduces the space occupied by the ventilation and cooling structure 100 of the bulb cross-flow type hydro-turbine generator in the bulb head 110, ensuring spacious installation and maintenance space. Even in small and medium-sized bulb cross-flow type hydro-turbine generators with smaller size and space, the arrangement and installation of the ventilation and cooling structure are easier to implement. Therefore, the above-mentioned ventilation and cooling structure 100 of the bulb cross-flow type hydro-turbine generator solves the problems of difficult ventilation arrangement, small installation and maintenance space, and difficult daily maintenance of small and medium-sized bulb cross-flow type hydro-turbine generators.

[0047] Please also refer to Figure 5 In some embodiments, multiple coolers 160 are provided. The multiple coolers 160 are spaced apart and arranged in a direction intersecting the central axis of the stator core 130. This arrangement of multiple coolers 160 can improve the cooling effect on the hot air flowing out of the cavity 115. Furthermore, the multiple coolers 160 are centrally arranged on the upstream side 111 of the bulb head 110. The cooling pipes 191 of the coolers 160 are centrally arranged, minimizing pipe losses and simplifying pipe layout. This further improves the cooling effect while increasing the installation and maintenance space of small and medium-sized bulb-type hydro-turbine generators.

[0048] Specifically, the plurality of coolers 160 are spaced apart in a plane perpendicular to the central axis of the stator core 130. Of course, in other embodiments, the plurality of coolers 160 may also be arranged toward the upstream side 111 and at least partially staggered with respect to the stator core 130.

[0049] Furthermore, in some embodiments, the bulb-type cross-flow turbine generator ventilation cooling structure 100 further includes a cooling pipeline 191 and a return pipeline 192. Cooling pipeline 191 includes a cooling main pipe 1911 and multiple cooling branch pipes 1912. One end of cooling main pipe 1911 is connected to each of the multiple cooling branch pipes 1912. The ends of the multiple cooling branch pipes 1912, remote from cooling main pipe 1911, are connected to the inlets of the multiple coolers 160 in a one-to-one correspondence.

[0050] The return line 192 includes a return main pipe 1921 and a plurality of return branch pipes 1922. One end of the return main pipe 1921 is connected to each of the plurality of return branch pipes 1922. The ends of the plurality of return branch pipes 1922, which are away from the return main pipe 1921, are connected to the outlets of the plurality of coolers 160 in a one-to-one correspondence.

[0051] In this way, a cooling main pipe 1911 simultaneously inputs cold fluid to multiple coolers 160 through multiple cooling branch pipes 1912, and then the hot fluid after heat exchange flows out to the return main pipe 1921 through multiple return branch pipes 1922, which greatly simplifies the structure of the cooling pipeline 191 of multiple coolers 160, further reduces pipeline loss, makes pipeline layout simpler, and further increases the installation and maintenance space of small and medium-sized bulb-type cross-flow turbine generators.

[0052] Of course, in other embodiments, each cooler 160 may be independently provided with a cooling pipe and a return pipe, as long as the entry of cold fluid and the smooth discharge of hot fluid in each cooler 160 are guaranteed.

[0053] Please refer again Figure 4 In some embodiments, a mounting plate 116 is vertically provided in the bulb head 110. The mounting plate 116 and the bulb head pedal 113 divide the space in the bulb head 110 into a gas return chamber 117, a bin maintenance chamber 114, and a hot air passage chamber 115. The gas return chamber 117 is located at one end of the bin maintenance chamber 114 and the hot air passage chamber 115 close to the upstream side 111. A first air hole 1161 connecting the gas return chamber 117 and the bin maintenance chamber 114 and a second air hole 1162 connecting the gas return chamber 117 and the hot air passage chamber 115 are formed on the mounting plate 116. The cooler 160 is mounted on the mounting plate 116 and is at least partially aligned with the first air hole 1161.

[0054] In this way, the hot air passes through the end of the cavity 115 near the upstream side 111 and communicates with the silo inspection cavity 114 through the gas return cavity 117. During use, the hot air in the hot air passage cavity 115 enters the cooler 160 through the second air hole 1162, the gas return cavity 117, and the first air hole 1161 in sequence for heat exchange and cooling. The cooled cold air then enters the silo inspection cavity 114. The gas return cavity 117 is located on the upstream side 111 of the bulb head 110, and the inner wall of the bulb head 110 at one end of the upstream side 111 is an arc-shaped inner wall. After the hot air in the hot air passage cavity 115 enters the gas return cavity 117, it collides with the inner wall of the upstream side 111 of the bulb head 110, allowing it to pass through the cooler 160 more smoothly. At least a portion of the cooler 160 is aligned with the first through hole to ensure that the hot air in the gas reflow chamber 117 quickly and directly contacts at least a portion of the cooler 160 after passing through the first through hole 1161, thereby ensuring a cooling effect.

[0055] Furthermore, in some embodiments, the bulb head 110 includes a conical cylinder 118 and a hemispherical shell 119. The open end of the hemispherical shell 119 and the small end of the conical cylinder 118 are detachably connected to two sides of the mounting plate 116 respectively.

[0056] During parts processing, the bulb head 110 is formed separately, which not only reduces the processing difficulty of the bulb head 110, but also reduces material waste and reduces processing costs. At the same time, the conical cylinder 118 and the hemispherical shell 119 are detachably connected to facilitate the assembly between the conical cylinder 118 and the hemispherical shell 119, further reducing the processing difficulty of the bulb head 110.

[0057] Please refer again Figure 3 and Figure 4 In some embodiments, a mounting hole 1131 is provided on the bubble head pedal 113 to connect the warehouse maintenance chamber 114 and the hot air passing chamber 115. Some of the multiple fans 170 are located in the warehouse maintenance chamber 114, and the rest are located in the hot air passing chamber 115. A cold air hole 2011 is formed in the wind-isolating structure 201 at a position corresponding to each fan 170. The multiple air ducts 180 include at least one first air duct 181 and a plurality of second air ducts 182. One end of the first air duct 181 is connected to the mounting hole 1131, and the other end is connected to the air inlet of the corresponding fan 170 located in the hot air passing chamber 115. One end of the multiple second air ducts 182 is connected to the multiple fans 170 located in the warehouse maintenance chamber 114 in a one-to-one correspondence. The second air duct 182 can ensure that the cold air in the warehouse inspection chamber 114 can smoothly pass through the hot air passage chamber 115 to reach the fan 170 without conflicting with the hot air in the hot air passage chamber 115 .

[0058] The cold air in the warehouse maintenance chamber 114 enters the side of the stator core 130 facing the bulb head 110 through two gas passages. One is that the cold air flows from the warehouse maintenance chamber 114 through the first air duct 181 and the fan 170 located in the warehouse maintenance chamber 114 and enters the side of the stator core 130 facing the bulb head 110. The other is that the cold air flows from the warehouse maintenance chamber 114 through the second air duct 182 and the fan 170 located in the hot air passage chamber 115 and enters the side of the stator core 130 facing the bulb head 110. This ensures that the cold air can pass through all parts of the stator core 130 as much as possible, avoiding the situation where the cold air cannot reach the part of the stator core 130 facing the hot air passage chamber 115, so as to achieve the purpose of uniformly cooling the stator core 130 and further improve the cooling effect.

[0059] Of course, in other embodiments, the fan 170 and the corresponding air guide duct 180 can be arranged only in the warehouse inspection cavity 114. At this time, a plurality of cold air holes 2011 are formed at circumferential intervals along the stator core 130 at the position corresponding to the wind isolation structure 201 and the warehouse inspection cavity 114, and only hot air holes 2012 are formed at the position corresponding to the wind isolation structure 201 and the hot air passage cavity 115.

[0060] Furthermore, in some embodiments, the second air duct 182 includes a straight pipe section 1821 and a bent pipe section 1822 connected at one end to the straight pipe section 1821. The end of the straight pipe section 1821 away from the bent pipe section 1822 is connected to the air inlet of the corresponding fan 170 located in the hot air passage chamber 115. The end of the bent pipe section 1822 away from the straight pipe section 1821 is connected to the mounting hole 1131.

[0061] The straight pipe section 1821 can be a straight pipe customized according to the installation location of the second air duct 182, or it can have the same structure as the first air duct 181. Specifically, in this embodiment, a portion of the first air duct 181 is used as the straight pipe section 1821, which can reduce the processing cost of the air duct 180. In particular, when the air ducts 180 are mass-produced, a large number of first air ducts 181 are first processed, and then a portion of the first air duct 181 is selected as the straight pipe section 1821 for the production of the second air duct 182, which greatly reduces the mass production cost of the air duct 180.

[0062] The structure of the bent tube section 1822 can be designed according to the size of the space in the hot air passage cavity 115 , the position of the mounting hole 1131 on the bubble head pedal 113 , and the like.

[0063] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0064] The above-described embodiments merely represent several implementation methods of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person of ordinary skill in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, and these modifications and improvements fall within the scope of protection of the present utility model. Therefore, the scope of protection of the present utility model patent shall be determined by the appended claims.

Claims

1. A ventilation and cooling structure for a bulb-type hydro-generator, characterized in that: include: The bulb head has an upstream side and a downstream side opposite to each other; a bulb head pedal is transversely arranged in the bulb head to form a silo inspection chamber and a hot air passage chamber arranged vertically in the bulb head; the hot air passage chamber and the silo inspection chamber are connected at one end close to the upstream side; a stator frame mounted on the downstream end of the bulb head; An air-isolating structure is provided in the stator base at one end thereof close to the bulb head; a plurality of cold air holes are formed at intervals along the circumference of the stator base at a position of the air-isolating structure close to the inner wall of the stator base; a hot air hole is formed at a position of the air-isolating structure opposite to the hot air passage cavity; A stator core is installed in the stator frame and is located on a side of the wind-shielding structure away from the bulb head; A rotor bracket, used for being mounted on the main shaft and located inside the stator core; A rotor pole, mounted on the rotor bracket and located between the stator core and the rotor bracket; The cooler is installed inside the bulb head near the upstream side; A plurality of fans are installed at intervals along the circumference of the stator core at positions of the bulb head close to the stator core; the air outlets of the plurality of fans are respectively connected to the plurality of cold air holes in a one-to-one correspondence; Multiple air guide tubes have one end that is connected to the air inlets of the multiple fans in a one-to-one correspondence, and the openings at the other end are connected to the warehouse maintenance cavity.

2. The ventilation cooling structure according to claim 1, characterized in that: There are multiple coolers; the multiple coolers are arranged at intervals along a direction intersecting the central axis of the stator core.

3. The ventilation cooling structure according to claim 2, characterized in that: It also includes a cooling pipeline and a return pipeline; the cooling pipeline includes a cooling main pipe and multiple cooling branch pipes; one end of the cooling main pipe is connected to the multiple cooling branch pipes; the ends of the multiple cooling branch pipes away from the cooling main pipe are connected to the inlets of the multiple coolers in a one-to-one correspondence; The reflux pipeline includes a reflux main pipe and multiple reflux branch pipes; one end of the reflux main pipe is connected to the multiple reflux branch pipes; one end of the multiple reflux branch pipes away from the reflux main pipe is connected to the outlets of the multiple coolers in a one-to-one correspondence.

4. The ventilation cooling structure according to claim 1, characterized in that: A mounting plate is vertically arranged inside the bulb head; the mounting plate and the bubble head pedal divide the space inside the bulb head into a gas reflux chamber, the bin body inspection chamber and the hot air passing chamber; the gas reflux chamber is located at one end of the bin body inspection chamber and the hot air passing chamber close to the upstream side; a first air passage connecting the gas reflux chamber and the bin body inspection chamber and a second air passage connecting the gas reflux chamber and the hot air passing chamber are formed on the mounting plate; the cooler is mounted on the mounting plate and is at least partially aligned with the first air passage.

5. The ventilation cooling structure according to claim 4, characterized in that: The bulb head comprises a conical cylinder and a hemispherical shell; the open end of the hemispherical shell and the small end of the conical cylinder are detachably connected to two sides of the mounting plate respectively.

6. The ventilation cooling structure according to claim 1, characterized in that: The bubble head pedal is provided with a mounting hole communicating with the bin inspection cavity and the hot air passage cavity; part of the plurality of fans is located in the bin inspection cavity, and the rest is located in the hot air passage cavity; The multiple air ducts include at least one first air duct and multiple second air ducts; one end of the first air duct is connected to the mounting hole, and the other end is connected to the air inlet corresponding to the fan located in the hot air passage cavity; one end of the multiple second air ducts is respectively connected to the multiple fans located in the warehouse inspection cavity.

7. The ventilation cooling structure according to claim 6, characterized in that: The second air duct includes a straight pipe section and a bent pipe section connected to the straight pipe section at one end; the end of the straight pipe section away from the bent pipe section is connected to the air inlet corresponding to the fan located in the hot air passage cavity; the end of the bent pipe section away from the straight pipe section is connected to the mounting hole.

8. A bulb tubular hydro-turbine generator, characterized in that: The invention comprises a ventilation and cooling structure of a bulb tubular hydro-turbine generator according to any one of claims 1 to 7.

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