Water-turbine generator set, oil groove outgoing line sealing device and application method of oil groove outgoing line sealing device

Abstract

The invention relates to the technical field of hydro-generators, and provides a hydro-generator set, an oil groove outgoing line sealing device and an application method thereof.The hydro-generator set comprises a set, an oil groove, a reducer pipe, a heating piece and a sealing piece, and the oil groove is used for storing lubricating oil; the reducer pipe is a stepped pipe, the small-diameter end of the reducer pipe is communicated with the oil groove, the large-diameter end of the reducer pipe is a free end, and an annular groove is formed in the inner wall of the large-diameter end of the reducer pipe; the heating piece is embedded in the large-diameter end of the reducer pipe; the sealing piece is inserted into the large-diameter end of the reducer pipe and is of an expansion structure. The reducer pipe is connected with the unit oil groove, and the sealing element is fixed in the reducer pipe in an expansion manner, so that the sealing element and the unit are integrated and fixed conveniently, meanwhile, the cable led out of the oil groove can be sealed by means of expansion, and the whole device has the advantages of being good in sealing effect and suitable for automatic detection of the hydraulic turbine unit oil groove.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hydroelectric generators, in particular to a hydroelectric generator unit, an oil tank outlet line sealing device and an application method thereof. BACKGROUND

[0002] The hydroelectric generator is the core electromechanical equipment of the hydropower station, which is composed of a water turbine and a generator. Its core function is to efficiently and continuously convert the potential and kinetic energy of water flow into electrical energy. Monitoring the oil volume and temperature of the oil tank (usually referring to the lubricating oil tank of the thrust bearing, guide bearing and upper / lower guide bearing) of the hydroelectric generator unit is crucial to ensure the safe and stable operation of the unit. A reliable and accurate technical solution is essential to prevent bearing bush burning, abnormal oil level and other major accidents.

[0003] The existing utility model patent with the authorization announcement number CN221256993U discloses a visual oil window for conveniently monitoring the oil volume of the oil tank of the hydroelectric generator unit. The invention patent application with the application publication number CN117109832A discloses a leakage detection method for the bearing oil tank cooler of the hydroelectric generator.

[0004] In the above-mentioned prior art solutions, the first one checks the oil volume of the oil tank by manually detecting through the visual oil window. However, due to the large size of the hydroelectric generator unit, the workers need to move up and down in the unit during the detection, which is not only time-consuming and labor-intensive, but also poses a safety risk. Therefore, the first solution is not suitable for the hydroelectric generator unit. The second solution discloses a technical solution for detecting the oil tank using a sensor, but does not disclose the corresponding detection structure. Moreover, the detection using the sensor inevitably involves the leading out of data lines, and the sealing of the data lines for oil tank detection is an important measure to ensure the normal operation of the hydroelectric generator unit. Therefore, a practical oil tank sealing solution is needed. SUMMARY

[0005] Therefore, the present application provides a hydroelectric generator unit, an oil tank outlet line sealing device and an application method thereof, which have a reliable sealing structure and are suitable for detecting the oil volume related parameters of the hydroelectric generator unit, to solve the problem that the existing solutions are not suitable for detecting large hydroelectric generator units.

[0006] The technical solution of the present application is as follows: On the one hand, the present application provides a hydroelectric generator unit, which comprises a unit, an oil tank, a variable diameter pipe, a heating element and a sealing element, wherein, The unit is used to convert water energy into mechanical energy and then output electrical energy; The oil tank is used to store lubricating oil for lubricating the components of the unit; The variable-diameter pipe is a stepped pipe, the small-diameter end of the variable-diameter pipe is communicated with the oil groove, the large-diameter end of the variable-diameter pipe is a free end, and an annular groove is arranged on the inner wall of the large-diameter end of the variable-diameter pipe; The heating element is embedded in the large-diameter end of the variable-diameter pipe; The sealing element is inserted into the large-diameter end of the variable-diameter pipe, and the sealing element is of an expansion structure to realize fixation in cooperation with the annular groove, and the oil groove cable is led out through the sealing element; The sealing element does not abut against the stepped surface of the variable-diameter pipe in the sealing state, and the gap between the end portion of the heating element corresponding to the sealing element and the stepped surface.

[0007] On the basis of the above technical scheme, preferably, further comprising an oil blocking element, the oil blocking element comprising a plugging element and an oil pump, the oil groove is provided with two, wherein, The two oil grooves are relatively isolated, one of the two oil grooves is used for accommodating lubricating oil for lubrication and is connected with the variable-diameter pipe, and the other oil groove is used for accommodating plugging oil; The plugging element is connected with the sealing element, and the plugging element is embedded in the small-diameter end of the variable-diameter pipe, and the oil groove cable passes through the plugging element; The liquid inlet end of the oil pump is communicated with the oil groove for accommodating plugging oil through a pipeline, the liquid outlet end of the oil pump is communicated with the large-diameter end of the variable-diameter pipe through a pipeline, and the liquid outlet port of the pipeline corresponds to the gap between the end portion of the sealing element and the stepped surface.

[0008] On the basis of the above technical scheme, preferably, the unit comprises a component to be lubricated, wherein, Among the two oil grooves, the oil groove for accommodating lubricating oil for lubrication is open on one side and is attached to the component to be lubricated; The oil groove for accommodating plugging oil is integrated on the inner side of the oil groove for accommodating lubricating oil for lubrication; The variable-diameter pipe is arranged for the oil groove for accommodating plugging oil, at least one oil groove cable extends into the oil groove for accommodating plugging oil, and the oil groove for accommodating plugging oil is provided with a sleeve corresponding to the oil groove cable.

[0009] On the other hand, the application provides an oil groove cable outlet sealing device, the oil groove cable outlet device is used as a sealing element, and the sealing element comprises a first clamping plate, a rubber block, a second clamping plate, a bolt and an expansion element, wherein, The side of the first clamping plate away from the unit is provided with the rubber block; The rubber block is partially embedded in the annular groove; The second clamping plate is arranged on the other side of the rubber block; The bolt penetrates through the second clamping plate and the rubber block, and the bolt is connected with the first clamping plate through threaded rotation; The expansion element is arranged in the rubber block, and the expansion element is used to expand the rubber block.

[0010] On the basis of the above technical scheme, preferably, the expansion piece comprises a guide body and a driving piece, wherein, The guide body is located in the rubber block, an end of the guide body towards the first clamping plate is provided as a conical structure, and a middle section of the guide body is provided with a receiving groove; The driving piece is inserted into the guide body; The rubber block and the expansion piece are integrally injection molded, a part of the rubber block is located in the receiving groove, and the driving piece is used to extrude the part of the rubber block located in the receiving groove.

[0011] On the basis of the above technical scheme, preferably, the guide body comprises a first connecting body, a connecting rod and a second connecting body, wherein, The first connecting body is located in the rubber block, an end of the first connecting body towards the first clamping plate is provided as a conical structure, and a thread groove and a first sealing groove which are connected in communication are arranged in the first connecting body; The connecting rod is arranged on a side of the first connecting body away from the machine set, the connecting rod is provided with a plurality of, and the receiving groove is a gap of the plurality of connecting rods; The second connecting body is arranged on a side of the connecting rod away from the first connecting body, the second connecting body is provided with a second sealing groove, and the second connecting body is embedded with the second clamping plate; One end of the driving piece is in sliding fit with the first sealing groove, and is connected with the thread groove through thread screwing, the other end of the driving piece is in sliding fit with the second sealing groove, and penetrates through the second clamping plate, and the driving piece is provided with a conical section corresponding to the receiving groove.

[0012] On the basis of the above technical scheme, preferably, a plurality of the first clamping plates, the rubber blocks and the second clamping plates are arranged side by side, and a slot is arranged on a side of each of the first clamping plates, the rubber blocks and the second clamping plates; Arc-shaped grooves are arranged on the circumferential surfaces of the first connecting body and the second connecting body, and the arc-shaped grooves are concentrically arranged with the slots.

[0013] On the basis of the above technical scheme, preferably, the sealing piece further comprises a guide rail and a support plate, wherein, The guide rail is made of elastic material, one side of the guide rail is connected with the plugging piece, and the first clamping plate is in sliding fit with the guide rail; The support plate is in sliding fit with the guide rail, and the support plate extends between adjacent two rubber blocks.

[0014] On the basis of the above technical scheme, preferably, a detection assembly is further included, the detection assembly comprises a shaft cylinder, an end cylinder and a sensor, wherein, The shaft cylinder is inserted into the rubber block, an end of the shaft cylinder provided with an opening penetrates through the second clamping plate, and a liquid leakage hole is arranged on the circumferential surface of the shaft cylinder; The end cylinder is arranged on the other end of the shaft cylinder, the end cylinder is inserted into the first clamping plate, and a contact hole is arranged on the end cylinder; The sensor is connected with the opening of the shaft cylinder.

[0015] In still another aspect, the application provides an oil tank sealing method using the oil tank outlet device described above, comprising the following steps: S1, setting the oil tank to the upper guide, lower guide or thrust shaft of the unit; S2, welding the small-diameter end of the reducing pipe to the oil tank and making the reducing pipe communicate with the oil tank; S3, clamping the rubber block with the first and second clamping plates and installing the bolts, then clamping the oil tank cable with the adjacent rubber block and assembling it into the large-diameter end of the reducing pipe; S4, pre-tightening the bolts, clamping and extruding the rubber block through the first and second clamping plates, so as to seal the peripheral surface of the oil tank cable, and at the same time the rubber block expands and embeds into the annular groove to realize fixation; S5, after a long period of use, further expanding the rubber block with the expansion piece to ensure the sealing effect.

[0016] The water turbine generator unit, oil tank outlet sealing device and application method thereof have the following advantages over the prior art: (1) By setting the reducing pipe to connect the unit oil tank and expanding and fixing the sealing element in the reducing pipe, the integration and fixation of the sealing element and the unit are facilitated, and the sealing of the outgoing oil tank cable can also be achieved by expansion, so that one end of the oil tank cable can be placed in the oil tank and connected to the sensor for detection, and the other end can be used for data transmission; after the sealing element is expanded, there is a gap between the stepped surface of the reducing pipe and the sealing element, which leaves space to store a certain amount of lubricating oil, and the reducing pipe is provided with a heating element corresponding to the gap, which facilitates heating of the lubricating oil by the heating element, and then the heat is transferred to the sealing element, which is beneficial to ensuring the performance of the sealing element in low temperature environment; the whole has the advantages of good sealing effect and being suitable for automatic detection of the oil tank of the water turbine unit; (2) By setting the oil blocking element, the small-diameter end of the reducing pipe can be blocked by the blocking element, which is beneficial to heat insulation to avoid the influence of the heated lubricating oil on the stability of the sealing element, and by setting the oil pump, a certain amount of lubricating oil can be pumped from the blocking oil tank to the space between the blocking element and the sealing element for temperature regulation as a heat conducting medium in the later stage; (3) In the structure of the oil tank outlet device, the first and second clamping plates are provided to extrude and expand the rubber block, so that when the oil tank cable passes through the rubber block, the rubber block will tightly fit the oil tank cable due to expansion, to ensure the reliability of the sealing structure, and the expansion of the rubber block also realizes the embedding with the annular groove in the reducing pipe, to ensure the stability of the sealing element installation; (4) By setting the expansion element in the sealing element, after the sealing element is applied for a long time and the performance is reduced, the rubber block can be further expanded by the expansion element to avoid the failure of the sealing structure of the sealing element and the oil tank cable, effectively improving the service life of the sealing element; (5) By setting the guide rail and the support plate in the sealing element, the first clamping plate and the support plate can be connected in series by the guide rail, which facilitates positioning during assembly and improves the convenience of assembly into the variable diameter pipe. The guide rail is made of elastic material. When the first clamping plate and the second clamping plate are locked by the bolt, the rubber block is compressed, and the compression amount of different rubber blocks is different. Therefore, the displacement amount of adjacent clamping plates is different. When the guide rail is set to be deformable, the compression of the rubber block will not be affected, and all clamping plates can be moved to the right position to ensure the expansion sealing of the oil tank cable. (6) By setting the detection assembly, the same installation structure as the oil tank cable is adopted, and the contact hole is formed in the end cylinder of the detection assembly. Therefore, the detection assembly is more sensitive to temperature than the oil tank cable, and can quickly transmit temperature changes to the rubber block. Therefore, when the outlet structure fails, the lubricating oil will first enter the leakage hole between the detection assembly and the rubber block, and then be detected by the sensor, which is beneficial to detecting the fault in time before the lubrication of the unit fails, thereby effectively improving the stability of the application. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without creative labor.

[0018] Figure 1 is a structural diagram of a hydroelectric generating set of the present application; Figure 2 is a three-dimensional view of a variable diameter pipe and a sealing element connection structure of a hydroelectric generating set of the present application; Figure 3 is a three-dimensional view of a variable diameter pipe and a sealing element connection structure of a hydroelectric generating set of the present application; Figure 2 is an enlarged view of point A in the middle; Figure 4 is a variable diameter pipe and a sealing element separation structure diagram of a hydroelectric generating set of the present application; Figure 5 is an exploded structural view of a sealing element of a hydroelectric generating set of the present application; Figure 6 is an exploded structural view of a sealing element and a detection assembly of a hydroelectric generating set of the present application; Figure 7Front view of variable diameter pipe of water turbine generator set of the present application; Figure 8 Front view of variable diameter pipe of water turbine generator set of the present application; Figure 7 A-A sectional view of the present application; Figure 9 A-A sectional view of variable diameter pipe of water turbine generator set of the present application; Figure 7 B-B sectional view of the present application; Figure 10 B-B sectional view of variable diameter pipe of water turbine generator set of the present application; Figure 9 B point structure of the present application; Figure 11 Front view of guide body of water turbine generator set of the present application; Figure 12 Front view of guide rail and sealing piece connection structure of water turbine generator set of the present application; Figure 13 Front view of detection assembly of water turbine generator set of the present application; Figure 14 Sectional view of detection assembly of water turbine generator set of the present application; Figure 15 Structure diagram of variable diameter pipe in embodiment two of the present application; Figure 16 Structure diagram of rubber block in embodiment two of the present application; In the figure: 1, unit; 11, part to be lubricated; 2, oil groove; 21, sleeve; 3, variable diameter pipe; 301, annular groove; 302, stepped surface; 4, heating piece; 5, sealing piece; 51, first clamping plate; 52, rubber block; 53, second clamping plate; 54, bolt; 55, expansion piece; 551, guide body; 5511, first connecting body; 5512, connecting rod; 5513, second connecting body; 552, driving piece; 5521, conical section; 56, guide rail; 57, support plate; 501, accommodating groove; 502, threaded groove; 503, first sealing groove; 504, second sealing groove; 505, slot; 506, arc-shaped groove; 6, oil blocking piece; 61, sealing piece; 62, oil pump; 7, detection assembly; 71, shaft cylinder; 72, end cylinder; 73, sensor; 701, liquid leakage hole; 702, contact hole. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme and advantages of the present application more clear, the technical scheme of the present application will be described clearly and completely below in combination with the drawings in the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0020] In the description of the embodiments of the present application, it should be noted that unless specifically defined and limited otherwise, the terms "connected", "connected to", "connection" should be interpreted broadly, for example, can be fixed connection, can also be detachable connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through intermediate medium. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0021] In the description of the embodiments of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the present application.

[0022] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0023] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present application, and cannot be understood as limiting the present application.

[0024] The following disclosure provides many different embodiments or examples for implementing different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeatedly refer to numerals and / or letters in different examples. Such repetition is for the purpose of simplification and clarity, and in itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but those skilled in the art can realize the applicability of other processes and / or the use of other materials.

[0025] Embodiment one: As Figures 1-14As shown, the water turbine generator set, oil tank outlet sealing device and application method thereof, comprising a unit 1, an oil tank 2, a variable diameter pipe 3, a heating element 4, a sealing element 5, an oil blocking element 6 and a detection assembly 7.

[0026] As shown, Figures 1-4 and Figure 8 The unit 1 is used to convert water energy into mechanical energy and then output electrical energy; the oil tank 2 is used to store lubricating oil for lubricating the components of the unit 1. As the above structure, the unit 1 is a water turbine generator set, and the oil tank 2 is used for bearing lubrication of the generator set. As shown, Figures 1-4 The variable diameter pipe 3 is a stepped pipe, the small diameter end of the variable diameter pipe 3 is connected with the oil tank 2, the large diameter end of the variable diameter pipe 3 is a free end, and the inner wall of the large diameter end of the variable diameter pipe 3 is provided with an annular groove 301; the sealing element 5 is inserted into the large diameter end of the variable diameter pipe 3, and the sealing element 5 is a tension structure to cooperate with the annular groove 301 to realize fixation, and the oil tank cable passes through the sealing element 5 to lead out; As the above structure, the oil tank 2 is used to contain lubricating oil, the variable diameter pipe 3 is connected with the oil tank 2, the sealing element 5 is installed in the variable diameter pipe 3, and the oil tank cable for data detection in the oil tank is connected with various sensors in the oil tank, and the other end of the oil tank cable is led out from the oil tank 2 through the sealing element 5, thereby realizing data transmission; Specifically, the variable diameter pipe 3 is provided in a stepped pipe structure, the small diameter end of the variable diameter pipe 3 is connected with the outer wall of the oil tank 2, and the large diameter end of the variable diameter pipe 3 is internally provided with an annular groove 301, so that after the sealing element 5 is installed into the large diameter end of the variable diameter pipe 3, the sealing element 5 can be embedded with the annular groove 301 through tensioning, so as to realize connection and fixation of the sealing element 5 and the oil tank 2. At the same time, the tensioning fixation structure of the sealing element 5 also realizes tensioning fixation and sealing of the oil tank cable, so as to avoid the problem of oil leakage of the outlet. The small diameter end of the variable diameter pipe 3 is welded and fixed with the outer wall of the oil tank 2.

[0027] As shown, Figures 7-9 The heating element 4 is embedded in the large diameter end of the variable diameter pipe 3; the sealing element 5 does not abut against the stepped surface 302 of the variable diameter pipe 3 in the sealing state, and the heating element 4 corresponds to the gap between the end of the sealing element 5 and the stepped surface 302. As the above structure, when the sealing member 5 is assembled into the inside of the reducing pipe 3, the sealing member 5 can abut against the stepped surface 302, and as the sealing member 5 is compressed and expanded, the end of the sealing member 5 can be away from the stepped surface 302 to form a gap, and the heating member 4 arranged corresponding to the gap can heat the lubricating oil, and then the heat can be transmitted to the sealing member 5 through the lubricating oil, so as to adjust the temperature of the sealing member 5 in a low temperature environment, which is beneficial to ensure that the physical properties of the sealing member 5 do not change in a low temperature environment, thereby avoiding the problem of sealing failure and oil leakage, and ensuring the stability of application.

[0028] As shown in Figure 1 , Figure 8 and Figure 9 , the oil blocking member 6 includes a blocking member 61 and an oil pump 62, and the oil groove 2 is provided with two oil grooves, wherein the two oil grooves are relatively isolated, one of the two oil grooves is used to accommodate lubricating oil for lubrication and is connected with the reducing pipe 3, and the other oil groove is used to accommodate blocking oil; the blocking member 61 is connected with the sealing member 5, and the blocking member 61 is embedded in the small-diameter end of the reducing pipe 3, and the oil groove cable passes through the blocking member 61; the inlet of the oil pump 62 is communicated with the oil groove 2 for accommodating the blocking oil through a pipeline, the outlet of the oil pump 62 is communicated with the large-diameter end of the reducing pipe 3 through a pipeline, and the outlet port of the pipeline corresponds to the gap between the end of the sealing member 5 and the stepped surface 302; As the above structure, the blocking member 61 of the oil blocking member 6 is used to separate the oil groove 2 for accommodating lubricating oil for lubrication from the sealing member 5, so that after the lubricating oil is used for a long time, the heat will not affect the sealing member 5, so as to avoid that the sealing member 5 is affected by the temperature to change the performance; Further, due to the arrangement of the blocking member 61, a gap is formed between the blocking member 61 and the sealing member 5, in order to ensure that the heating member 4 can have a heating effect, the oil pump 62 is arranged to deliver the blocking oil into the gap, and the blocking oil is accommodated in a separate oil groove 2, and after the sealing member 5 is installed and expanded, the blocking oil is extracted by the oil pump 62 into the gap between the blocking member 61 and the sealing member 5, so that when the heating member 4 works, the heat can uniformly heat the sealing member 5 through the blocking oil. Specifically, the lubricating oil for lubrication and the blocking oil are the same oil, so that when the blocking member 61 fails, the lubricating oil on both sides will not affect the normal use even if it is mixed.

[0029] As shown in Figure 1As shown, the machine set 1 includes a component 11 to be lubricated, wherein two oil grooves 2, one for containing lubricating oil for lubrication, is open on one side and adheres to the component 11 to be lubricated; the other for containing sealing lubricating oil is integrated on the inner side of the oil groove 2 for containing lubricating oil for lubrication; the variable diameter pipe 3 is arranged for the oil groove 2 for containing sealing lubricating oil, and at least one oil groove cable extends into the oil groove 2 for containing sealing lubricating oil, and the oil groove 2 for containing sealing lubricating oil is provided with a sleeve 21 corresponding to the oil groove cable; As shown above, the component 11 to be lubricated is not limited to various shafts, bearings or other moving parts of the machine set 1, and the oil groove 2 for containing lubricating oil is open on one side and adheres to the component 11 to be lubricated, so that the component 11 to be lubricated can be lubricated by the lubricating oil when it is in motion; Further, a smaller oil groove 2 is arranged in the oil groove 2, which is used to contain sealing lubricating oil to provide sealing lubricating oil for the oil pump 62; Further, in the oil groove cable for data transmission in the oil groove 2, at least one is introduced into the smaller oil groove 2, which is used to connect the oil quantity sensor to detect the storage of sealing lubricating oil to ensure the normal operation of the component; Further, the smaller oil groove 2 is provided with a sleeve 21 for sleeving the oil groove cable to ensure the stability of the cable.

[0030] As shown above, Figures 5-9 The oil groove outlet device is used as a sealing member 5, which includes a first clamping plate 51, a rubber block 52, a second clamping plate 53, a bolt 54 and an expansion member 55, wherein the first clamping plate 51 is provided with a rubber block 52 away from one side of the machine set 1; the rubber block 52 is partially embedded in the annular groove 301; the second clamping plate 53 is arranged on the other side of the rubber block 52; the bolt 54 penetrates through the second clamping plate 53 and the rubber block 52, and the bolt 54 is connected with the first clamping plate 51 by screwing; the expansion member 55 is arranged in the rubber block 52, and the expansion member 55 is used to expand the rubber block 52; As shown above, the sealing member 5 is arranged as a clamping type extrusion expansion member structure, when applied, the oil groove cable passes through the rubber block 52, and the first clamping plate 51 and the second clamping plate 53 are arranged on the two sides of the rubber block 52, at this time, by locking the bolt 54, the first clamping plate 51 and the second clamping plate 53 can be relatively close to each other to extrude the rubber block 52, and when the rubber block 52 expands to the side, it can extrude the oil groove cable and embed in the annular groove 301 to realize the connection and fixation with the variable diameter pipe 3; After prolonged use, especially under the influence of temperature changes, the properties of the rubber block 52 are prone to change, leading to insufficient sealing. At this time, the rubber block 52 can be further expanded by the expansion member 55 to ensure that the rubber block 52 is tightly pressed against the oil tank cable, thereby ensuring the service life and stability of the structure.

[0031] like Figure 9 and Figure 10 As shown, the expansion member 55 includes a guide body 551 and a drive member 552. The guide body 551 is located inside the rubber block 52. One end of the guide body 551 facing the first clamping plate 51 is set with a conical structure, and a receiving groove 501 is provided in the middle section of the guide body 551. The drive member 552 is inserted into the guide body 551. The rubber block 52 and the expansion member 55 are injection molded into an integral structure. A portion of the rubber block 52 is located in the receiving groove 501. The drive member 552 is used to squeeze the portion of the rubber block 52 located in the receiving groove 501. As described above, the expansion member 55 is configured as two parts: a guide body 551 and a driving member 552. The driving member 552 is located inside the guide body 551 and is injection molded into an integral structure with the rubber block 52. In practical applications, since one end of the guide body 551 is set as a conical structure, when the first clamping plate 51 and the second clamping plate 53 are relatively close, the rubber block 52 will spread better due to the guidance of the conical structure, so that the rubber block 52 can fit tightly against the oil tank cable, thereby ensuring a good sealing effect. The guide body 551 is provided with a receiving groove 501, which allows the rubber block 52 to enter and fit the drive member 552 during injection molding. This increases the thickness of the rubber block 52. When the drive member 552 moves, the local rubber block 52 that has entered the receiving groove 501 can be squeezed outward. This can compensate for the decrease in sealing effect of the rubber block 52 after long-term use, and prevent oil leakage. This helps to extend the service life of the seal 5.

[0032] like Figure 10 and Figure 11As shown, the guide body 551 includes a first connecting body 5511, a connecting rod 5512, and a second connecting body 5513. The first connecting body 5511 is located inside the rubber block 52. The end of the first connecting body 5511 facing the first clamping plate 51 is set with a tapered structure, and the first connecting body 5511 is provided with a connected threaded groove 502 and a first sealing groove 503. The connecting rod 5512 is located on the side of the first connecting body 5511 away from the unit 1. There are multiple connecting rods 5512, and the receiving groove 501 is multiple connecting rods 5512. The gap; the second connecting body 5513 is located on the side of the connecting rod 5512 away from the first connecting body 5511, the second connecting body 5513 has a second sealing groove 504, and the second connecting body 5513 is fitted with the second clamping plate 53; one end of the driving member 552 is slidably engaged with the first sealing groove 503 and is threadedly connected with the threaded groove 502, the other end of the driving member 552 is slidably engaged with the second sealing groove 504 and passes through the second clamping plate 53, and the driving member 552 is provided with a tapered section 5521 corresponding to the receiving groove 501.

[0033] As described above, the guide body 551 is arranged sequentially from the first clamping plate 51 to the second clamping plate 53 as a first connecting body 5511, a connecting rod 5512, and a second connecting body 5513, wherein a conical structure is provided on the first connecting body 5511 for guiding the expansion of the rubber block 52. The second connector 5513 is connected to the first connector 5511 through multiple connecting rods 5512, thereby naturally forming a receiving groove 501. By changing the structure or number of connecting rods 5512, the diffusion direction of the rubber block 52 can be controlled when the expansion member 55 moves, so as to accurately compensate for the location prone to failure. Furthermore, the first connector 5511 has a threaded groove 502 and a first sealing groove 503, and the second connector 5513 has a second sealing groove 504. The first sealing groove 503 and the second sealing groove 504 are used to assemble the drive component 552 and achieve sealing. In this way, when the rubber block 52 is injection molded, the injection plastic will only enter through the gaps between the multiple connecting rods 5512 to achieve filling and ensure that it can be extruded by the drive component 552 later. Specifically, the drive member 552 is screwed into the threaded groove 502, and the other end passes through the second clamping plate 53. At the same time, the position of the drive member 552 corresponding to the receiving groove 501 is set as a tapered section 5521. Thus, when the drive member 552 is rotated, it can move axially because the drive member 552 is engaged with the threaded groove 502, so as to squeeze the rubber block 52 through the tapered section 5521.

[0034] like Figure 5 and Figure 6As shown, multiple first clamping plates 51, rubber blocks 52, and second clamping plates 53 are arranged side by side, and slots 505 are opened on the sides of the first clamping plates 51, rubber blocks 52, and second clamping plates 53; arc-shaped grooves 506 are provided on the circumferential surfaces of the first connector 5511 and the second connector 5513, and the arc-shaped grooves 506 and the slots 505 are concentrically arranged. As described above, multiple first clamping plates 51, rubber blocks 52, and second clamping plates 53 are provided, and slots 505 are opened on the side. In this way, two first clamping plates 51, two rubber blocks 52, and two second clamping plates 53 can be spliced ​​together to clamp the oil tank cable, which improves the convenience of assembly. Furthermore, both the first connector 5511 and the second connector 5513 are provided with arc-shaped grooves 506, so that the same first connector 5511 or second connector 5513 can correspond to a maximum of four bolts 54, so as to ensure that when the rubber block 52 is squeezed, it can be tightened in the direction of the bolts 54.

[0035] like Figure 8 , Figure 9 and Figure 12 As shown, the sealing element 5 also includes a guide rail 56 and a support plate 57. The guide rail 56 is made of elastic material, and one side of the guide rail 56 is connected to the sealing element 61. The first clamping plate 51 is slidably engaged with the guide rail 56. The support plate 57 is slidably engaged with the guide rail 56, and the support plate 57 extends between two adjacent rubber blocks 52. As described above, the sealing element 5 includes a guide rail 56 and a support plate 57. Specifically, there are two guide rails 56. One side of the guide rail 56 is connected to the sealing component 61, which makes it convenient to install the sealing component 61 into the small diameter end of the reducer 3. Specifically, the guide rail 56 is used to connect the first clamping plate 51 in series, so that multiple first clamping plates 51 can clamp the rubber block 52 to complete the shaping, and improve the convenience of installation into the large diameter end of the variable diameter pipe 3. Furthermore, a support plate 57 is connected in series on the guide rail 56. Specifically, the two guide rails 56 are set at the edges of the sealing member 61, while the support plate 57 is clamped at the edges of two adjacent rubber blocks 52. Since the edges of the rubber blocks 52 are not suitable for setting the expansion member 55, the edges of the rubber blocks 52 can be further compressed by setting the support plate 57 to ensure the sealing effect.

[0036] like Figure 7 , Figure 8 , Figure 13 and Figure 14As shown, the detection assembly 7 includes a shaft cylinder 71, an end cylinder 72, and a sensor 73. The shaft cylinder 71 is inserted into the rubber block 52, and one end of the shaft cylinder 71 with an opening passes through the second clamping plate 53. A leakage hole 701 is opened on the circumferential surface of the shaft cylinder 71. The end cylinder 72 is disposed on the other end of the shaft cylinder 71, and the end cylinder 72 is inserted into the first clamping plate 51. A contact hole 702 is opened on the end cylinder 72. The sensor 73 is connected to the opening of the shaft cylinder 71. As described above, the detection component 7 is used to detect the sealing performance of the seal 5; The detection component 7 is inserted into the seal 5 via a shaft cylinder 71. The part of the shaft cylinder 71 corresponding to the rubber block 52 has a leakage hole 701. The shaft cylinder 71 has a hollow structure and a sensor 73 is connected to its end. Specifically, the shaft cylinder 71 is made of metal, which has a better heat conduction effect than the oil tank cable, and is therefore more susceptible to temperature effects. This makes the seal between the shaft cylinder 71 and the rubber block 52 more prone to failure. Therefore, after the seal fails and lubricating oil enters, the lubricating oil will enter the shaft cylinder 71 through the leakage hole and can be detected by the sensor 73. However, at this time, there will be no lubricating oil leakage problem. This allows for timely maintenance before the oil leakage occurs due to seal failure, thereby ensuring the normal operation of the unit. Furthermore, the other end of the shaft cylinder 71 is provided with an end cylinder 72, and the end cylinder 72 is provided with a contact hole 702. This increases the contact area between the detection component 7 and the lubricating oil, making it easier to conduct heat and detect the risk of leakage in advance. Furthermore, the sealing lubricating oil can be heated by the heating element 4, and the detection component 7 can transfer heat more quickly in a short time. This can cause the rubber block 52 around the detection component 7 to quickly differentiate its properties from the rubber block 52 around the oil tank cable, thereby adjusting the leakage detection cycle.

[0037] The oil tank sealing method of the present invention, using the above-mentioned oil tank outlet device, includes the following steps: S1. Set the oil tank 2 to fit the upper guide, lower guide or thrust shaft of the unit 1; S2. Weld the smaller diameter end of the reducer 3 to the oil tank 2, and connect the reducer 3 to the oil tank 2. S3. Clamp the rubber block 52 with the first clamping plate 51 and the second clamping plate 53, and install the bolt 54. Then clamp the oil tank cable with the adjacent rubber block 52, and assemble the whole into the large diameter end of the reducer 3. S4. The bolt 54 is pre-tightened, and the rubber block 52 is clamped and squeezed by the first clamping plate 51 and the second clamping plate 53 to seal the periphery of the oil tank cable. At the same time, the rubber block 52 expands and embeds into the annular groove 301 to achieve fixation. S5. After prolonged use, the rubber block 52 is further tightened by the expansion member 55 to ensure a sealing effect.

[0038] Example 2: The difference between this embodiment and Embodiment 1 is that the expansion member 55 is not provided, and the structure of the rubber block 52 has been changed; like Figure 15 and Figure 16 As shown, the clamping plate and rubber block 52 are still set inside the reducing pipe 3. In this example, the cross-sectional shape of the reducing pipe 3 is not set to a rectangle, but to a circle or any other shape. Furthermore, the rubber blocks 52 are not only arranged in parallel, but also stacked in an overlapping shape. This can meet customized needs, especially when the variable diameter pipe 3 is interfered with by the turbine unit structure, making it impossible to form a regular cylindrical shape. In some places, the number of stacked rubber blocks 52 can be appropriately reduced or increased to meet the structural requirements of the variable diameter pipe 3 and the corresponding installation requirements.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A hydroelectric generating unit characterized by: Including unit (1), oil tank (2), variable diameter pipe (3), heating element (4) and sealing element (5), wherein, The unit (1) is used for converting water energy into mechanical energy, and then outputting electric energy; The oil tank (2) is used for storing lubricating oil for lubricating the components of the unit (1); The variable diameter pipe (3) is a stepped pipe, the small diameter end of the variable diameter pipe (3) is communicated with the oil tank (2), the large diameter end of the variable diameter pipe (3) is a free end, and the inner wall of the large diameter end of the variable diameter pipe (3) is provided with an annular groove (301); The heating element (4) is embedded in the large diameter end of the variable diameter pipe (3); The sealing element (5) is inserted into the large diameter end of the variable diameter pipe (3), and the sealing element (5) is an expansion structure to cooperate with the annular groove (301) to realize fixation, and the oil tank cable is led out through the sealing element (5); The sealing element (5) does not resist the stepped surface (302) of the variable diameter pipe (3) in the sealed state, and the heating element (4) corresponds to the gap between the end of the sealing element (5) and the stepped surface (302).

2. The hydroelectric generating unit of claim 1, wherein: Further comprising an oil blocking element (6), the oil blocking element (6) comprises a plugging element (61) and an oil pump (62), the oil tank (2) is provided with two, wherein, Two oil tanks (2) are isolated from each other, one of the oil tanks (2) is used for accommodating lubricating oil for lubrication and is connected with the variable diameter pipe (3), and the other oil tank (2) is used for accommodating plugging oil; The plugging element (61) is connected with the sealing element (5), and the plugging element (61) is embedded in the small diameter end of the variable diameter pipe (3), and the oil tank cable passes through the plugging element (61); The liquid inlet end of the oil pump (62) is communicated with the oil tank (2) for accommodating plugging oil through a pipeline, the liquid outlet end of the oil pump (62) is communicated with the large diameter end of the variable diameter pipe (3) through a pipeline, and the liquid outlet port of the pipeline corresponds to the gap between the end of the sealing element (5) and the stepped surface (302).

3. The hydroelectric generating unit of claim 2, wherein: The unit (1) comprises a component to be lubricated (11), wherein Among the two oil tanks (2), the oil tank (2) for accommodating lubricating oil for lubrication is open on one side and is attached to the component to be lubricated (11); The oil tank (2) for accommodating plugging oil is integrated on the inner side of the oil tank (2) for accommodating lubricating oil for lubrication; The variable diameter pipe (3) is provided with the oil tank (2) for accommodating plugging oil, at least one oil tank cable extends into the oil tank (2) for accommodating plugging oil, and the oil tank (2) for accommodating plugging oil is provided with a sleeve (21) corresponding to the oil tank cable.

4. The oil tank outlet device applied to the hydroelectric generator set according to claim 2, characterized in that: The oil tank cable outlet device is used as the sealing element (5), and the sealing element (5) comprises a first clamping plate (51), a rubber block (52), a second clamping plate (53), a bolt (54) and an expansion element (55), wherein The side of the first clamping plate (51) away from the unit (1) is provided with the rubber block (52); The rubber block (52) is partially embedded in the annular groove (301); The second clamping plate (53) is arranged on the other side of the rubber block (52); The bolt (54) penetrates the second clamping plate (53) and the rubber block (52), and the bolt (54) is connected with the first clamping plate (51) through threaded rotation; The expansion element (55) is arranged in the rubber block (52), and the expansion element (55) is used for expanding the rubber block (52).

5. The oil tank outlet device according to claim 4, wherein: The expansion element (55) comprises a guide body (551) and a driving element (552), wherein, The guide body (551) is located in the rubber block (52), one end of the guide body (551) towards the first clamping plate (51) is arranged in a tapered structure, and a middle section of the guide body (551) is provided with a receiving groove (501); The driving element (552) is inserted into the guide body (551); The rubber block (52) and the expansion element (55) are integrally injection molded, part of the rubber block (52) is located in the receiving groove (501), and the driving element (552) is used for extruding part of the rubber block (52) located in the receiving groove (501).

6. The oil tank outlet device according to claim 5, wherein: The guide body (551) comprises a first connecting body (5511), a connecting rod (5512) and a second connecting body (5513), wherein, The first connecting body (5511) is located in the rubber block (52), one end of the first connecting body (5511) towards the first clamping plate (51) is arranged in a tapered structure, and the first connecting body (5511) is provided with a threaded groove (502) and a first sealing groove (503) in communication; The connecting rod (5512) is arranged on the side of the first connecting body (5511) away from the unit (1), the connecting rod (5512) is provided with a plurality of connecting rods (5512), and the receiving groove (501) is a gap for the plurality of connecting rods (5512); The second connecting body (5513) is arranged on the side of the connecting rod (5512) away from the first connecting body (5511), the second connecting body (5513) is provided with a second sealing groove (504), and the second connecting body (5513) is embedded with the second clamping plate (53); One end of the driving element (552) is in sliding fit with the first sealing groove (503), and the other end of the driving element (552) is in threaded rotation with the threaded groove (502), one end of the driving element (552) is in sliding fit with the second sealing groove (504), and the other end of the driving element (552) penetrates the second clamping plate (53), and the driving element (552) is provided with a tapered section (5521) corresponding to the receiving groove (501).

7. The oil tank outlet device according to claim 6, wherein: The first clamping plate (51), the rubber block (52) and the second clamping plate (53) are arranged in parallel and provided with a plurality of notches (505); The circumferential surface of the first connecting body (5511) and the second connecting body (5513) is provided with an arc-shaped groove (506), and the arc-shaped groove (506) is concentrically arranged with the notch (505).

8. The oil sump outlet device according to any one of claims 4 to 6, wherein: The sealing piece (5) further comprises a guide rail (56) and a support plate (57), wherein, The guide rail (56) is made of elastic material, one side of the guide rail (56) is connected with the blocking piece (61), and the first clamping plate (51) is in sliding fit with the guide rail (56); The support plate (57) is in sliding fit with the guide rail (56), and the support plate (57) extends between two adjacent rubber blocks (52).

9. The oil tank outlet device according to any one of claims 4 to 6, wherein: Further comprising a detection assembly (7), the detection assembly (7) comprises a shaft cylinder (71), an end cylinder (72) and a sensor (73), wherein, The shaft cylinder (71) is inserted into the rubber block (52), one end of the shaft cylinder (71) provided with an opening penetrates through the second clamping plate (53), and a liquid leakage hole (701) is formed in the circumferential surface of the shaft cylinder (71); The end cylinder (72) is arranged on the other end of the shaft cylinder (71), the end cylinder (72) is inserted into the first clamping plate (51), and a contact hole (702) is formed in the end cylinder (72); The sensor (73) is connected with the opening of the shaft cylinder (71).

10. A method of sealing an oil sump using the oil sump outlet device as claimed in claim 4, wherein, The method comprises the following steps: S1, the oil tank (2) is arranged on the upper guide, the lower guide or the thrust shaft of the unit (1); S2, the small diameter end of the variable diameter pipe (3) is welded with the oil tank (2), and the variable diameter pipe (3) is communicated with the oil tank (2); S3, the first clamping plate (51) and the second clamping plate (53) are used to clamp the rubber block (52), and the bolt (54) is installed, then the adjacent rubber blocks (52) are used to clamp the oil tank cable, and the whole is assembled into the large diameter end of the variable diameter pipe (3); S4, the bolt (54) is pre-tightened, the rubber block (52) is clamped and extruded by the first clamping plate (51) and the second clamping plate (53), so as to seal the circumferential surface of the oil tank cable, and the rubber block (52) is expanded and embedded into the annular groove (301) to realize fixation; S5, after long time application, the rubber block (52) is further expanded and tightened by the expansion piece (55), so as to ensure the sealing effect.

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