A tensioning device for the synchronous chain of the cylinder valve servomotor of a hydro-generating unit

Abstract

The present invention discloses a tensioning device for the synchronous chain of a cylindrical valve servomotor of a water turbine generator set, which relates to the technical field of chain tensioning. The device includes a frame body, a first sliding plate, a second sliding plate, a stroke adjusting rod and a stroke switch. The first sliding plate and the second sliding plate are slidably arranged on the frame body with adjustable distance. A first tensioning wheel and a second tensioning wheel for cooperating with the inner and outer chains of the synchronous chain are respectively rotatably arranged on the first sliding plate and the second sliding plate. The stroke adjusting rod is arranged on the second sliding plate, and the stroke switch is arranged on the frame body and electrically connected to the cylindrical valve servomotor. The position of the stroke adjusting rod relative to the second sliding plate is adjustable or the position of the stroke switch relative to the frame body is adjustable. The tensioning device for the synchronous chain of the cylindrical valve servomotor of the water turbine generator set of the present invention can synchronously tension the inner and outer chains of the synchronous chain, and can send a signal to interrupt the operation of the cylindrical valve servomotor when jamming occurs during the operation of the cylindrical valve, thereby improving the safety and reliability of the operation of the cylindrical valve.

Description

Technical Field

[0001] The present invention relates to the technical field of chain tensioning, and particularly to a synchronous chain tensioning device for a cylinder valve servomotor of a hydro-generating unit. Background Art

[0002] The cylindrical valve is a new type of inlet valve for a water turbine. It is installed between the stay vanes and the guide vanes, and has the advantages of compact structure and light weight. Its operating mechanism mainly consists of 6 identical direct cylinder servomotors. The lower support of the servomotor is directly bolted to the top cover. The lower end of the lifting rod (also known as the piston rod) is screwed into the upper end face of the cylinder body through a double-headed bolt, connecting the cylinder body and the servomotor piston into one body, so that the servomotor piston drives the cylinder body to move up and down together under the action of the operating oil pressure.

[0003] In the related art, in order to ensure the synchronous movement of the 6 operating servomotors, double-layer sprockets are installed at the top of the rolling screw pairs of the 6 servomotors, and then 6 loops of synchronous chains are connected in series with each other to ensure the synchronous operation of the 6 servomotors. However, during the vertical up and down movement of the cylinder valve, the synchronous chain will gradually become loose and fall off as the operation time increases, ultimately resulting in the inability to drive the servomotor, and the tightness of the inner and outer chains cannot be kept consistent, thereby causing additional stress to the disc spring of the servomotor, affecting the normal operation of the cylinder valve. At the same time, when the cylinder valve gets stuck during operation, the tension of the synchronous chain may exceed the rated load and ultimately cause the chain to break, seriously affecting the normal operation of the cylindrical valve. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems in the related art to some extent.

[0005] Therefore, an embodiment of the present invention provides a synchronous chain tensioning device for a cylinder valve servomotor of a hydro-generating unit. The synchronous chain tensioning device for a cylinder valve servomotor of a hydro-generating unit can synchronously tension the inner and outer sides of the synchronous chain, ensure the same tightness of the inner and outer chains, avoid additional stress on the disc spring of the servomotor, ensure the normal operation of the cylinder valve, and at the same time can send a signal to interrupt the operation of the cylinder valve servomotor when the cylinder valve gets stuck during operation, facilitating the inspection and treatment of the cylinder valve, avoiding the phenomenon of chain breakage, greatly improving the safety and reliability of the cylinder valve operation, and having a simple structure and low manufacturing cost, with significant safety and economic benefits.

[0006] The synchronous chain tensioning device for a cylinder valve servomotor of an embodiment of the present invention includes:

[0007] A frame body, which is used to connect the corresponding synchronous chain to the inner wall of the machine room;

[0008] A first slide plate and a second slide plate, the first slide plate and the second slide plate are slidably arranged on the frame in sequence, and the distance between the first slide plate and the second slide plate is adjustable, a first tensioning wheel is rotatably arranged on the first slide plate, and a second tensioning wheel is rotatably arranged on the second slide plate, and the first tensioning wheel and the second tensioning wheel are used to respectively cooperate with the inner and outer chains of the synchronous chain close to each other on one side;

[0009] A stroke adjustment rod and a stroke switch, wherein the stroke adjustment rod is arranged on the second slide, and the stroke switch is arranged on the frame corresponding to the stroke adjustment rod and is used to be electrically connected to the cylinder valve relay, and the stroke adjustment rod is adjustable relative to the second slide or the stroke switch is adjustable relative to the frame.

[0010] The synchronous chain tensioning device of the cylinder valve relay of the turbine generator set in the embodiment of the present invention can synchronously tension the inner and outer sides of the synchronous chain to ensure that the tightness of the inner and outer chains is consistent, avoid the relay disc spring from generating additional stress, and ensure the normal operation of the cylinder valve. At the same time, when the cylinder valve becomes stuck during operation, a signal can be sent to interrupt the operation of the cylinder valve relay, which is convenient for checking and processing the cylinder valve and avoiding the breakage of the synchronous chain, thereby greatly improving the safety and reliability of the cylinder valve operation. It also has a simple structure, low manufacturing cost, and significant safety and economic benefits.

[0011] In some embodiments, a buffer assembly is included, which includes a sleeve, a pushing member and an elastic member. The sleeve is arranged on the frame corresponding to the second slide, the pushing member is slidably arranged on the sleeve, and a portion of the pushing member extends out of the sleeve for abutting against the second slide. The elastic member is arranged on the sleeve and stops at one side of the pushing member. The elastic member is used to drive the pushing member to move in a direction close to the second slide.

[0012] In some embodiments, the buffer assembly includes a first screw, which is arranged on the sleeve and is adjustable in position along the axial direction of the sleeve and is arranged on a side of the elastic member facing away from the pushing member.

[0013] In some embodiments, the frame includes a positioning plate, the first screw is threadedly connected to the positioning plate corresponding to the sleeve, the first screw is threadedly connected to the positioning plate, and the first screw is threadedly connected to the sleeve, a positioning nut is threadedly connected to the first screw, and the positioning nut is arranged on the side of the positioning plate away from the sleeve and is used to cooperate with the positioning plate to stop.

[0014] In some embodiments, a through hole extending radially along the sleeve is provided on the sleeve corresponding to the elastic member, a pin rod is passed through the through hole, and the pin rod is used to stop and cooperate with the elastic member in the axial direction of the sleeve.

[0015] In some embodiments, the frame body includes a fixing plate and a supporting plate arranged in an L shape. The fixing plate is used for connecting to the inner wall of the machine room. The supporting plate is provided with a sliding channel, and the first sliding plate and the second sliding plate are respectively in clearance fit with the sliding channel.

[0016] In some embodiments, the fixing plate is provided with a plurality of fixing holes for cooperating with fixing bolts on the inner wall of the machine room, and / or, a supporting rib plate is arranged between the supporting plate and the fixing plate.

[0017] In some embodiments, a second screw rod is included. The second screw rod is arranged between the first sliding plate and the second sliding plate. One end of the second screw rod is rotatably connected to the first sliding plate, and the other end of the second screw rod is threadedly connected to the second sliding plate, or one end of the second screw rod is rotatably connected to the second sliding plate, and the other end of the second screw rod is threadedly connected to the first sliding plate.

[0018] In some embodiments, a first nut is threadedly connected to the second screw rod. The first nut is used for abutting and cooperating with the second sliding plate or the first sliding plate, and / or, a second nut is fixedly connected to the second screw rod. The second nut is used for driving the second screw rod to rotate.

[0019] In some embodiments, a vertical rod is arranged on the second sliding plate. The stroke adjusting rod is arranged on the vertical rod and is adjustable in position along the moving direction of the second sliding plate. The stroke switch is fixedly arranged on the frame body corresponding to the stroke adjusting rod.

[0020] The synchronous chain tensioning device for the turbine valve servomotor of the embodiment of the present invention has the following beneficial effects:

[0021] 1. It can tension the inner and outer chains of the rotary chain through the first tensioning wheel and the second tensioning wheel respectively, and the distance between the first sliding plate and the second sliding plate is adjustable to meet the tensioning of the rotary chain in different tightness states, ensuring that the tightness of the inner and outer chains of the synchronous chain is consistent, avoiding additional stress on the servomotor disc spring, and ensuring the normal operation of the turbine valve;

[0022] 2. It can send a signal to interrupt the operation of the turbine valve servomotor when the turbine valve gets stuck during operation, facilitating the inspection and treatment of the turbine valve, avoiding the phenomenon of the synchronous chain breaking, greatly improving the safety and reliability of the turbine valve operation, and having a simple structure, low manufacturing cost, significant safety and economic benefits, and wide popularization value;

[0023] 3. By providing a buffer assembly, when the second slide plate drives the stroke adjusting rod to move, the elastic force applied to the second slide plate by the elastic member reduces the moving speed of the stroke adjusting rod, thereby preventing the stroke adjusting rod from continuing to move after entering the sensing range of the travel switch and damaging the travel switch, effectively extending the service life of the travel switch, which is safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic structural view of the first perspective of the synchronous chain tensioning device of the cylinder valve servo of the hydro-generating unit according to an embodiment of the present invention.

[0025] Figure 2 is a schematic structural view of the second perspective of the synchronous chain tensioning device of the cylinder valve servo of the hydro-generating unit according to an embodiment of the present invention.

[0026] Figure 3 is a schematic structural view of the third perspective of the synchronous chain tensioning device of the cylinder valve servo of the hydro-generating unit according to an embodiment of the present invention.

[0027] REFERENCE MARKS:

[0028] Frame body 1; fixing plate 11; support plate 12; sliding channel 121; support rib plate 13; pressing plate 14; positioning plate 15;

[0029] First slide plate 2; first tensioning wheel 21;

[0030] Second slide plate 3; second tensioning wheel 31; vertical rod 32;

[0031] Stroke adjusting rod 4;

[0032] Travel switch 5;

[0033] Buffer assembly 6; sleeve 61; pushing member 62; elastic member 63; first screw 64; positioning nut 65; pin rod 66;

[0034] Second screw 7; first nut 71; second nut 72. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0035] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0036] As Figure 1 、 Figure 2 and Figure 3As shown in the figure, the tensioning device for the synchronous chain of the servomotor of the cylindrical valve of the hydro-generator unit according to the embodiment of the present invention includes a frame body 1, a first sliding plate 2, a second sliding plate 3, a stroke adjusting rod 4 and a travel switch 5. The frame body 1 is used to connect to the inner wall of the machine room corresponding to the synchronous chain. The first sliding plate 2 and the second sliding plate 3 are sequentially slidably arranged on the frame body 1, and the distance between the first sliding plate 2 and the second sliding plate 3 is adjustable. A first tensioning wheel 21 is rotatably arranged on the first sliding plate 2, and a second tensioning wheel 31 is rotatably arranged on the second sliding plate 3. The first tensioning wheel 21 and the second tensioning wheel 31 are used to respectively cooperate with the mutually approaching sides of the inner and outer chains of the synchronous chain. The stroke adjusting rod 4 is arranged on the second sliding plate 3, and the travel switch 5 is arranged on the frame body 1 corresponding to the stroke adjusting rod 4 and is used to be electrically connected to the servomotor of the cylindrical valve. The position of the stroke adjusting rod 4 relative to the second sliding plate 3 is adjustable or the position of the travel switch 5 relative to the frame body 1 is adjustable.

[0037] When the tensioning device for the synchronous chain of the servomotor of the cylindrical valve of the hydro-generator unit according to the embodiment of the present invention is in use, the device is fixed in the machine room where the cylindrical valve is installed through the frame body 1, so that the first tensioning wheel 21 and the second tensioning wheel 31 are located between the inner and outer chains of the synchronous chain. By increasing the distance between the first sliding plate 2 and the second sliding plate 3, since the first sliding plate 2 and the second sliding plate 3 are slidably arranged on the frame body 1, during the process of increasing the distance between the first sliding plate 2 and the second sliding plate 3, the first tensioning wheel 21 and the second tensioning wheel 31 respectively cooperate with the mutually approaching sides of the inner and outer chains of the synchronous chain and apply the same tension to the inner and outer chains of the synchronous chain, which is convenient for tensioning the synchronous chain. At the same time, the position of the stroke adjusting rod 4 or the travel switch 5 is adjusted according to the position of the second sliding plate 3, and the distance between the stroke adjusting rod 4 and the travel switch 5 is adjusted to a set distance so that the stroke adjusting rod 4 is outside the sensing range of the travel switch 5, and it is ensured that when the stroke adjusting rod 4 moves, the travel switch 5 can sense the stroke adjusting rod 4. When the cylindrical valve jams during operation, the forces on the inner and outer chains of the synchronous chain change. The side with the greater force drives the first sliding plate 2 and the second sliding plate 3 to move, and then drives the stroke adjusting rod 4 to move to shorten the distance between the stroke adjusting rod 4 and the travel switch 5. The travel switch 5 senses the stroke adjusting rod 4 and then transmits a signal to the servomotor of the cylindrical valve to interrupt the operation of the cylindrical valve.

[0038] The tensioning device for the synchronous chain of the turbine governor valve in the embodiment of the present invention tensions the inner and outer chains of the rotary chain through the first tensioning wheel 21 and the second tensioning wheel 31 respectively, and the distance between the first slide plate 2 and the second slide plate 3 is adjustable to meet the tensioning of the rotary chain in different tightness states, ensuring that the tightness of the inner and outer chains of the synchronous chain is consistent, avoiding additional stress on the governor valve disc spring, ensuring the normal operation of the governor valve. At the same time, when the governor valve gets stuck during operation, a signal can be sent to interrupt the operation of the governor valve relay, facilitating the inspection and treatment of the governor valve, avoiding the phenomenon of the synchronous chain breaking, greatly improving the safety and reliability of the governor valve operation, and having a simple structure, low manufacturing cost, significant safety and economic benefits, and wide popularization value.

[0039] In some embodiments, such as Figure 1 , Figure 2 and Figure 3 shown, the frame body 1 includes a fixing plate 11 and a supporting plate 12 arranged in an L shape. The fixing plate 11 is used to connect to the inner wall of the machine room, and the supporting plate 12 is provided with a sliding channel 121. The first slide plate 2 and the second slide plate 3 are respectively in clearance fit with the sliding channel 121.

[0040] Specifically, the frame body 1 includes a fixing plate 11, a supporting plate 12 and a supporting rib plate 13. The fixing plate 11 is arranged at the end of the supporting plate 12 and is arranged in an L shape with the supporting plate 12. The fixing plate 11 is provided with a plurality of fixing holes, through which it can be matched with the fixing bolts on the inner wall of the water turbine machine room, thereby realizing the detachable installation of the frame body 1. The supporting rib plate 13 is arranged on both sides of the supporting plate 12 and is perpendicular to the fixing plate 11. The supporting rib plate 13 ensures the load-bearing capacity of the supporting plate 12 during use, ensuring the reliability of the cooperation between the supporting wheel and the inner and outer chains of the synchronous chain. At the same time, the supporting plate 12 is provided with a sliding channel 121. By respectively fitting the first slide plate 2 and the second slide plate 3 into the sliding channel 121 in clearance, the friction between the first slide plate 2 and the second slide plate 3 when moving relative to the supporting plate 12 can be reduced, and the first slide plate 2 and the second slide plate 3 can be prevented from getting stuck when moving in the moving channel.

[0041] Optionally, two pressing plates 14 are correspondingly arranged on the supporting plate 12. The pressing plates 14 are detachably connected to the supporting plate 12 by screws. The cross-sections of the two pressing plates 14 are in an L shape. The sliding channel 121 is limited by the two pressing plates 14 and the supporting plate 12. When the first slide plate 2 and the second slide plate 3 are fitted in the sliding channel 121, the gaps between the two sides and the top of the first slide plate 2 and the sliding channel 121 are within 0.25 - 0.35 mm, and the gaps between the two sides and the top of the second slide plate 3 and the sliding channel 121 are within 0.25 - 0.35 mm.

[0042] Optionally, a slide groove is provided on the support plate 12, and the cross-section of the slide groove is "convex" shaped. The slide groove limits a sliding channel 121 for the movement of the first slide plate 2 and the second slide plate 3. The gap between the two sides and the top of the first slide plate 2 and the sliding channel 121 is within 0.25-0.35mm, and the gap between the two sides and the top of the second slide plate 3 and the sliding channel 121 is within 0.25-0.35mm.

[0043] In some embodiments, Figure 1 and Figure 2 As shown, it includes a buffer assembly 6, which includes a sleeve 61, a push piece 62 and an elastic piece 63. The sleeve 61 is arranged on the frame 1 corresponding to the second slide 3, the push piece 62 is slidably arranged on the sleeve 61, and a part of the push piece 62 extends out of the sleeve 61 to abut against the second slide 3. The elastic piece 63 is arranged on the sleeve 61 and stops at one side of the push piece 62. The elastic piece 63 is used to drive the push piece 62 to move in a direction close to the second slide 3.

[0044] Specifically, the sleeve 61 is arranged on the side of the support plate 12 away from the fixed plate 11, and a sleeve cover is provided at one end of the sleeve 61 close to the fixed plate 11. The pushing member 62 includes a pushing rod and a pushing plate fixedly connected, and the pushing plate is slidably arranged in the sleeve 61. The pushing rod is slidably passed through the sleeve cover and part of the pushing rod extends out of the sleeve 61. The elastic member 63 is arranged on the side of the pushing plate away from the fixed plate 11. When the second slide plate 3 drives the stroke adjustment rod 4 to move, the second slide plate 3 contacts the pushing rod, thereby compressing the elastic member 63. The elastic member 63 applies elastic force to the second slide plate 3 to reduce the moving speed of the stroke adjustment rod 4, thereby preventing the stroke adjustment rod 4 from continuing to move after entering the sensing range of the stroke switch 5 to cause damage to the stroke switch. By setting the buffer assembly 6, the service life of the stroke switch 5 can be effectively extended, which is safe and reliable.

[0045] Optionally, the elastic member 63 is a disc spring plate group.

[0046] Optionally, the sleeve 61 may be fixedly connected to the frame body 1 or may be arranged on the frame body 1 in an adjustable position along the extending direction of the support plate 12 .

[0047] In some embodiments, Figure 1 and Figure 2 As shown, the buffer assembly 6 includes a first screw 64, which is adjustable in axial position along the sleeve 61 and is arranged on the sleeve 61 and on the side of the elastic member 63 away from the push member 62. By adjusting the length of the first screw 64 in the sleeve 61, the compression length of the elastic member 63 can be adjusted, thereby limiting the distance of the second slide plate 3 when it moves in the support push member 62, so as to protect the travel switch 5.

[0048] Optionally, the first screw rod 64 is threadedly connected to the sleeve 61 .

[0049] In some embodiments, Figure 1 and Figure 2 As shown, the frame 1 includes a positioning plate 15, a first screw 64 threadedly connected to the positioning plate 15, and the first screw 64 is threadedly connected to the sleeve 61, a positioning nut 65 is threadedly connected to the first screw 64, and the positioning nut 65 is arranged on the side of the positioning plate 15 away from the sleeve 61 and is used to cooperate with the positioning plate 15 for blocking.

[0050] By setting the positioning plate 15, it is convenient to install the first screw 64 to achieve the connection between the first screw 64 and the frame 1. The first screw 64 is threadedly connected to the sleeve 61. When the first screw 64 is rotated to move the position of the first screw 64 relative to the positioning plate 15, the position of the sleeve 61 and the top support can also be adjusted. At the same time, a positioning nut 65 is set to limit the moving distance of the first screw 64 relative to the positioning plate 15, so as to avoid the first screw 64 from being disconnected from the positioning plate 15 during the adjustment process, which is convenient and reliable.

[0051] In some embodiments, Figure 1 and Figure 2 As shown, a through hole extending radially along the sleeve 61 is provided on the sleeve 61 corresponding to the elastic member 63, and a pin rod 66 is inserted in the through hole. The pin rod 66 is used to cooperate with the elastic member 63 in the axial direction of the sleeve 61. The elastic member 63 is stopped by setting the pin rod 66 to ensure the elastic deformation of the elastic member 63 during use, so as to effectively slow down the speed when the second slide plate 3 drives the travel adjustment rod 4 to move close to the travel switch 5, thereby ensuring the protection effect of the travel switch 5.

[0052] In some embodiments, Figure 1 and Figure 2 As shown, it includes a second screw rod 7, which is arranged between the first slide plate 2 and the second slide plate 3. One end of the second screw rod 7 is rotatably connected to the first slide plate 2, and the other end of the second screw rod 7 is threadedly connected to the second slide plate 3, or one end of the second screw rod 7 is rotatably connected to the second slide plate 3, and the other end of the second screw rod 7 is threadedly connected to the first slide plate 2.

[0053] Specifically, when installing the second screw rod 7, one end of the second screw rod 7 can be rotatably connected to the first slide plate 2 via a rotating bearing, and the other end can be threadedly connected to the second slide plate 3. Alternatively, one end of the second screw rod 7 can be rotatably connected to the second slide plate 3 via a rotating bearing (the rotating bearing is not shown in the figure), and the other end can be threadedly connected to the first slide plate 2, so that when the second screw rod 7 is rotated, the requirement of adjusting the distance between the first slide plate 2 and the second slide plate 3 can be met.

[0054] In some embodiments, Figure 1 and Figure 2As shown, a first nut 71 is threadedly connected to the second screw rod 7. The first nut 71 is used for making a stop fit with the second slide plate 3 or the first slide plate 2. By providing the first nut 71, after adjusting the distance between the first slide plate 2 and the second slide plate 3 through the first screw rod 64, the position of the first nut 71 is adjusted to make the first nut 71 make a stop fit with the first slide plate 2 or the second slide plate 3, so as to prevent the first slide plate 2 and the second slide plate 3 from moving towards each other under the tension of the inner and outer chains of the synchronous chain during use, and to ensure the tensioning effect of the first tensioning wheel 21 and the second tensioning wheel 31 on the first slide plate 2 and the second slide plate 3.

[0055] In some embodiments, as Figure 1 and Figure 2 shown, a second nut 72 is fixedly connected to the second screw rod 7. The second nut 72 is used for driving the second screw rod 7 to rotate. By providing the second nut 72, when rotating the second screw rod 7, tools such as a wrench can be used to cooperate with the second nut 72, and by rotating the second nut 72, the second screw rod 7 can be driven to rotate, which is convenient for rotating the second screw rod 7 and the adjustment is convenient.

[0056] In some embodiments, as Figure 1 shown, a vertical rod 32 is provided on the second slide plate 3. The stroke adjustment rod 4 is arranged on the vertical rod 32 and its position is adjustable along the moving direction of the second slide plate 3. The travel switch 5 is fixedly arranged on the frame body 1 corresponding to the stroke adjustment rod 4.

[0057] Specifically, a moving groove is provided on the support plate 12 corresponding to the second slide plate 3. The vertical rod 32 is fixed below the second slide plate 3 and passes through the moving groove. When the second slide plate 3 moves relative to the support plate 12, the vertical rod 32 moves in the moving groove following the second slide plate 3. The stroke adjustment rod 4 extends along the extension direction of the moving groove, that is, the moving direction of the second slide plate 3, and is threadedly connected to the vertical rod 32. By rotating the stroke adjustment rod 4, the movement of the stroke adjustment rod 4 relative to the second slide plate 3 can be realized. During the initial installation of the device, the stroke adjustment rod 4 can be adjusted to realize the adjustment of the distance between the stroke adjustment rod 4 and the travel switch 5, and the operation is convenient and reliable.

[0058] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0059] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0060] In the present invention, unless otherwise clearly specified and defined, terms such as "mounted", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or communicable with each other; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0061] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0062] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0063] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A tensioning device for the synchronous chain of the cylinder valve servomotor of a water turbine generator set, characterized in that, include: A frame, the frame being used to be connected to the inner wall of the machine room corresponding to the synchronous chain; A first slide plate and a second slide plate, the first slide plate and the second slide plate are slidably arranged on the frame in sequence, and the distance between the first slide plate and the second slide plate is adjustable, a first tensioning wheel is rotatably arranged on the first slide plate, and a second tensioning wheel is rotatably arranged on the second slide plate, and the first tensioning wheel and the second tensioning wheel are used to respectively cooperate with the inner and outer chains of the synchronous chain close to each other on one side; A second screw rod, wherein the second screw rod is disposed between the first slide plate and the second slide plate, one end of the second screw rod is rotatably connected to the first slide plate, and the other end of the second screw rod is threadedly connected to the second slide plate, or one end of the second screw rod is rotatably connected to the second slide plate, and the other end of the second screw rod is threadedly connected to the first slide plate; A stroke adjustment rod and a stroke switch, wherein the stroke adjustment rod is arranged on the second slide plate, and the stroke switch is arranged on the frame body corresponding to the stroke adjustment rod and is used to be electrically connected to the cylinder valve servo, and the stroke adjustment rod is adjustable relative to the second slide plate or the stroke switch is adjustable relative to the frame body; The frame includes an L-shaped fixed plate and a supporting plate, wherein the fixed plate is used to be connected to the inner wall of the machine room, and the supporting plate is provided with a sliding channel, and the first sliding plate and the second sliding plate are respectively clearance-fitted in the sliding channel.

2. The tensioning device for the synchronous chain of the cylinder valve servomotor of the water turbine generator set according to claim 1, wherein, The invention comprises a buffer assembly, which comprises a sleeve, a pushing member and an elastic member. The sleeve is arranged on the frame corresponding to the second slide plate. The pushing member is slidably arranged on the sleeve, and a part of the pushing member extends out of the sleeve to abut against the second slide plate. The elastic member is arranged on the sleeve and stops at one side of the pushing member. The elastic member is used to drive the pushing member to move in a direction close to the second slide plate.

3. The tensioning device for the synchronous chain of the cylinder valve servomotor of the water turbine generator set according to claim 2, wherein The buffer assembly comprises a first screw rod, which is arranged on the sleeve and on a side of the elastic member facing away from the pushing member so as to be adjustable in position along the axial direction of the sleeve.

4. The tensioning device for the synchronous chain of the cylinder valve servomotor of the water turbine generator set according to claim 3, characterized in that, The frame includes a positioning plate, the first screw is threadedly connected to the positioning plate, and the first screw is threadedly connected to the sleeve, a positioning nut is threadedly connected to the first screw, and the positioning nut is arranged on a side of the positioning plate away from the sleeve and is used to cooperate with the positioning plate for blocking.

5. The tensioning device for the synchronous chain of the cylinder valve servomotor of the water turbine generator set according to claim 2, characterized in that, The sleeve is provided with a through hole extending in the radial direction of the sleeve corresponding to the elastic member, and a pin rod is penetrated in the through hole. The pin rod is used for blocking and cooperating with the elastic member in the axial direction of the sleeve.

6. The synchronous chain tensioning device for the tubular valve servomotor of a water turbine generator set according to claim 1, wherein The fixing plate is provided with a plurality of fixing holes, and the fixing holes are used to cooperate with fixing bolts of the inner wall of the machine chamber, and / or a supporting rib is provided between the supporting plate and the fixing plate.

7. The tensioning device for the synchronous chain of the cylindrical valve servomotor of the water turbine generator set according to claim 1, characterized in that, The second screw rod is threadedly connected with a first nut, the first nut is used to cooperate with the second slide plate or the first slide plate, and / or the second screw rod is fixedly connected with a second nut, the second nut is used to drive the second screw rod to rotate.

8. The tensioning device for the synchronous chain of the cylinder valve servo motor of the water turbine generator set according to claim 1, characterized in that, A vertical rod is provided on the second slide plate. The stroke adjustment rod is arranged on the vertical rod and its position is adjustable along the moving direction of the second slide plate. The travel switch is fixedly arranged on the frame corresponding to the stroke adjustment rod.

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