Synchronous chain tensioning device for cylinder valve servomotor of water-turbine generator set

Abstract

The invention discloses a synchronous chain tensioning device for a cylinder valve servomotor of a water-turbine generator set, and relates to the technical field of chain tensioning, the synchronous chain tensioning device comprises 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, and the distance between the first sliding plate and the second sliding plate is adjustable; the first sliding plate and the second sliding plate are rotationally provided with a first tensioning wheel and a second tensioning wheel which are used for being matched with the inner side chain and the outer side chain of the synchronous chain respectively, the stroke adjusting rod is arranged on the second sliding plate, and the stroke switch is arranged on the frame body and electrically connected with the cylinder 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. According to the synchronous chain tensioning device for the cylinder valve servomotor of the water-turbine generator set, the inner side chain and the outer side chain of the synchronous chain can be tensioned synchronously, a signal can be sent out to interrupt the operation of the cylinder valve servomotor when the cylinder valve is jammed in the operation process, and the safety and the reliability of the operation of the cylinder valve are improved.

Description

Technical Field

[0001] The invention relates to the technical field of chain tensioning, and in particular to a synchronous chain tensioning device of a cylinder valve servomotor of a water turbine generator set. Background Art

[0002] The cylinder valve is a new type of water inlet valve for the turbine. It is installed between the fixed guide vane and the movable guide vane. It has the advantages of compact structure and light weight. Its operating mechanism is mainly composed of 6 identical straight cylinder servomotors. The lower support of the servomotor is directly connected to the top cover. The lower end of the lifting rod (also called piston rod) is screwed into the upper end surface of the cylinder through the stud bolts, connecting the cylinder and the servomotor piston into one, so that the servomotor piston drives the cylinder up and down under the action of the operating oil pressure.

[0003] In the related technology, in order to ensure the synchronous movement of the six operating relays, a double-layer sprocket is installed at the top of the six relay rolling screw pairs, and then 6 circles of synchronization chains are used to connect them in series to ensure the synchronous operation of the six relays. However, during the vertical up and down movement of the cylinder valve, the synchronization chain will gradually become loose and fall off as the running time increases, eventually resulting in the inability to drive the relay to move, and the tightness of the inner and outer chains cannot be kept consistent, which in turn causes additional stress to be generated with the relay disc spring, affecting the normal operation of the cylinder valve. At the same time, when the cylinder valve gets stuck during operation, the tension of the synchronization chain may exceed the rated load and eventually cause the chain to break, seriously affecting the normal operation of the cylinder valve. Summary of the invention

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

[0005] To this end, an embodiment of the present invention proposes a synchronous chain tensioning device for a cylinder valve relay of a hydro-turbine generator set. The synchronous chain tensioning device for the cylinder valve relay of the hydro-turbine generator set 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 additional stress on the relay disc spring, and ensure the normal operation of the cylinder valve. At the same time, when the cylinder valve is 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. The device has a simple structure and low manufacturing cost, and has significant safety and economic benefits.

[0006] The synchronous chain tensioning device of the cylinder valve servo of the hydro-turbine generator set according to the embodiment of the present invention comprises: 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 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.

[0007] 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.

[0008] 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.

[0009] 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.

[0010] 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.

[0011] 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.

[0012] In some embodiments, the frame includes a fixed plate and a support plate arranged in an L-shape, the fixed plate is used to be connected to the inner wall of the machine room, the support plate is provided with a sliding channel, and the first slide plate and the second slide plate are respectively clearance-fitted in the sliding channel.

[0013] In some embodiments, 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.

[0014] In some embodiments, a second screw is included, which is arranged between the first slide plate and the second slide plate, one end of the second screw is rotationally connected to the first slide plate, and the other end of the second screw is threadedly connected to the second slide plate, or one end of the second screw is rotationally connected to the second slide plate, and the other end of the second screw is threadedly connected to the first slide plate.

[0015] In some embodiments, a first nut is threadedly connected to the second screw rod, and the first nut is used to cooperate with the second slide plate or the first slide plate, and / or a second nut is fixedly connected to the second screw rod, and the second nut is used to drive the second screw rod to rotate.

[0016] In some embodiments, a vertical rod is disposed on the second slide, the stroke adjustment rod is disposed on the vertical rod and is positionally adjustable along the moving direction of the second slide, and the stroke switch is fixedly disposed on the frame corresponding to the stroke adjustment rod.

[0017] The synchronous chain tensioning device of the cylinder valve servo of the hydro-turbine generator set according to the embodiment of the present invention has the following beneficial effects: 1. The inner and outer chains of the slewing chain can be tensioned respectively by the first tensioning wheel and the second tensioning wheel, and the distance between the first slide plate and the second slide plate can be adjusted to meet the tensioning of the slewing chain in different tightness states, ensuring the consistency of the tightness of the inner and outer chains of the synchronous chain, avoiding additional stress on the disc spring of the relay, and ensuring the normal operation of the cylinder valve; 2. When the cylinder valve is stuck during operation, it can send a signal to interrupt the operation of the cylinder valve relay, which is convenient for checking and handling the cylinder valve and avoiding the breakage of the synchronous chain, greatly improving the safety and reliability of the cylinder valve operation. It has a simple structure and low manufacturing cost, and has significant safety and economic benefits and wide promotion value. 3. By setting up a buffer component, when the second slide plate drives the travel adjustment rod to move, the elastic force applied to the second slide plate by the elastic member reduces the moving speed of the travel adjustment rod, thereby preventing the travel adjustment rod from continuing to move after entering the sensing range of the travel switch to cause damage to the travel switch, which can effectively extend the service life of the travel switch, and is safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram from a first perspective of a synchronous chain tensioning device of a cylinder valve servomotor of a hydro-turbine generator set according to an embodiment of the present invention.

[0019] Figure 2 It is a structural schematic diagram from a second perspective of a synchronous chain tensioning device of a cylinder valve servomotor of a hydro-turbine generator set according to an embodiment of the present invention.

[0020] Figure 3 It is a structural schematic diagram from a third perspective of a synchronous chain tensioning device of a cylinder valve servomotor of a hydro-turbine generator set according to an embodiment of the present invention.

[0021] Reference numerals: Frame 1; fixing plate 11; supporting plate 12; sliding channel 121; supporting ribs 13; pressing plate 14; positioning plate 15; First slide plate 2; first tensioning wheel 21; The second slide plate 3; the second tensioning wheel 31; the vertical rod 32; Stroke adjustment lever 4; Travel switch 5; Buffer assembly 6; sleeve 61; push member 62; elastic member 63; first screw rod 64; positioning nut 65; pin rod 66; Second screw rod 7 ; first nut 71 ; second nut 72 . DETAILED DESCRIPTION

[0022] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0023] like Figure 1 , Figure 2 and Figure 3 As shown, the synchronous chain tensioning device of the cylinder valve relay of the hydro-turbine generator set in the embodiment of the present invention includes a frame 1, a first slide plate 2, a second slide plate 3, a stroke adjustment rod 4 and a stroke switch 5. The frame 1 is used to correspond to the synchronous chain connected to the inner wall of the machine room, the first slide plate 2 and the second slide plate 3 are slidably arranged on the frame 1 in sequence, and the distance between the first slide plate 2 and the second slide plate 3 is adjustable, a first tensioning wheel 21 is rotatably provided on the first slide plate 2, and a second tensioning wheel 31 is rotatably provided on the second slide plate 3, the first tensioning wheel 21 and the second tensioning wheel 31 are used to respectively cooperate with the inner and outer sides of the synchronous chain that are close to each other, the stroke adjustment rod 4 is arranged on the second slide plate 3, the stroke switch 5 is arranged on the frame 1 corresponding to the stroke adjustment rod 4 and is used to be electrically connected to the cylinder valve relay, the stroke adjustment rod 4 is adjustable relative to the second slide plate 3 or the stroke switch 5 is adjustable relative to the frame 1.

[0024] When the synchronous chain tensioning device of the cylinder valve relay of the hydro-turbine generator set according to the embodiment of the present invention is used, the device is fixed in the machine room where the cylinder valve is installed through the frame 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, and the distance between the first slide plate 2 and the second slide plate 3 is increased. Since the first slide plate 2 and the second slide plate 3 are slidably arranged on the frame 1, in the process of increasing the distance between the first slide plate 2 and the second slide plate 3, the first tensioning wheel 21 and the second tensioning wheel 31 are respectively matched on the side where the inner and outer chains of the synchronous chain are close to each other and apply the same tensioning force to the inner and outer chains of the synchronous chain, so as to facilitate the tensioning of the synchronous chain. At the same time, according to the second The position of the slide plate 3 adjusts the position of the stroke adjustment rod 4 or the stroke switch 5, and the distance between the stroke adjustment rod 4 and the stroke switch 5 is adjusted to a set distance so that the stroke adjustment rod 4 is outside the sensing range of the stroke switch 5, and it is ensured that when the stroke adjustment rod 4 moves, the stroke switch 5 can sense the stroke adjustment rod 4. When the cylinder valve gets stuck during operation, the force on the inner and outer chains of the synchronous chain changes, and the side with greater force drives the first slide plate 2 and the second slide plate 3 to move, thereby driving the stroke adjustment rod 4 to move to shorten the distance between the stroke adjustment rod 4 and the stroke switch 5. The stroke switch 5 senses the stroke adjustment rod 4 and then transmits a signal to the cylinder valve relay to interrupt the operation of the cylinder valve.

[0025] The synchronous chain tensioning device of the cylinder valve relay of the hydro-turbine generator set in the embodiment of the present invention tensions the inner and outer chains of the rotating chain respectively through the first tensioning wheel 21 and the second tensioning wheel 31, and the distance between the first slide plate 2 and the second slide plate 3 is adjustable to meet the tensioning of the rotating chain in different tightness states, thereby ensuring that the tightness of the inner and outer chains of the synchronous chain is consistent, avoiding the relay disc spring from generating additional stress, and ensuring the normal operation of the cylinder valve. At the same time, when the cylinder valve is 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. The device has a simple structure and low manufacturing cost, and has significant safety and economic benefits and wide promotion value.

[0026] In some embodiments, Figure 1 , Figure 2 and Figure 3 As shown, the frame 1 includes an L-shaped fixed plate 11 and a support plate 12, the fixed plate 11 is used to be connected to the inner wall of the machine room, the support plate 12 is provided with a sliding channel 121, and the first slide plate 2 and the second slide plate 3 are respectively clearance-fitted in the sliding channel 121.

[0027] Specifically, the frame 1 includes a fixing plate 11, a supporting plate 12 and a supporting rib 13. The fixing plate 11 is arranged at the end of the supporting plate 12 and is L-shaped with the supporting plate 12. The fixing plate 11 is provided with a plurality of fixing holes, which can be matched with the fixing bolts on the inner wall of the turbine chamber through the fixing holes, thereby realizing the detachable installation of the frame 1. The supporting ribs 13 are arranged on both sides of the supporting plate 12 and are perpendicular to the fixing plate 11. The load-bearing capacity of the support plate 12 during use is guaranteed by the supporting ribs 13, and the reliability of the matching between the inner and outer chains of the support wheel and the synchronous chain is guaranteed. At the same time, a sliding channel 121 is provided on the support plate 12. By respectively gap-fitting the first slide plate 2 and the second slide plate 3 in the sliding channel 121, the friction of the first slide plate 2 and the second slide plate 3 when moving relative to the support 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.

[0028] Optionally, two pressing plates 14 are correspondingly provided on the support plate 12, and the pressing plates 14 are detachably connected to the support plate 12 by screws. The cross-section of the two pressing plates 14 is L-shaped, and a sliding channel 121 is restricted by the two pressing plates 14 and the support plate 12. When the first slide plate 2 and the second slide plate 3 are engaged in the sliding channel 121, 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] Optionally, the elastic member 63 is a disc spring plate group.

[0033] 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 .

[0034] 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.

[0035] Optionally, the first screw rod 64 is threadedly connected to the sleeve 61 .

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] In some embodiments, Figure 1 and Figure 2 As shown, the second screw rod 7 is threadedly connected with a first nut 71, and the first nut 71 is used to cooperate with the second slide plate 3 or the first slide plate 2. By setting the first nut 71, after adjusting the distance between the first slide plate 2 and the second slide plate 3 by the first screw rod 64, the position of the first nut 71 is adjusted to make the first nut 71 cooperate with the first slide plate 2 or the second slide plate 3 to avoid the first slide plate 2 and the second slide plate 3 moving towards each other under the tensioning force of the inner and outer chains of the synchronous chain during use, so as 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.

[0042] In some embodiments, Figure 1 and Figure 2 As shown, a second nut 72 is fixedly connected to the second screw rod 7, and the second nut 72 is used to drive the second screw rod 7 to rotate. By setting the second nut 72, when the second screw rod 7 is rotated, the second nut 72 can be cooperated with by tools such as a wrench, and the second nut 72 is rotated to drive the second screw rod 7 to rotate, which is convenient for rotating the second screw rod 7 and convenient for adjustment.

[0043] In some embodiments, Figure 1 As shown, a vertical rod 32 is provided on the second slide plate 3 , a stroke adjustment rod 4 is provided on the vertical rod 32 and can be adjusted in position along the moving direction of the second slide plate 3 , and a stroke switch 5 is fixedly provided on the frame 1 corresponding to the stroke adjustment rod 4 .

[0044] Specifically, a moving groove is provided on the support plate 12 corresponding to the second slide plate 3, and the vertical rod 32 is fixed under 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 with the second slide plate 3 in the moving groove. 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. The movement of the stroke adjustment rod 4 relative to the second slide plate 3 can be achieved by rotating the stroke adjustment rod 4. When the device is initially installed, the stroke adjustment rod 4 can be adjusted to adjust the distance between the stroke adjustment rod 4 and the stroke switch 5. The operation is convenient and reliable.

[0045] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0046] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0047] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0049] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0050] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A synchronous chain tensioning device for a cylinder valve servo of a hydro-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 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.

2. The synchronous chain tensioning device of the cylinder valve servo of the hydro-turbine generator set according to claim 1 is characterized in that: 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 synchronous chain tensioning device of the cylinder valve servo of the hydro-turbine generator set according to claim 2 is characterized in that: 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 synchronous chain tensioning device of the cylinder valve servo of the hydro-turbine generator set according to claim 3 is 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 synchronous chain tensioning device of the cylinder valve servo of the hydro-turbine generator set according to claim 2 is 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 of the cylinder valve servo of the hydro-turbine generator set according to claim 1 is characterized in that: 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.

7. The synchronous chain tensioning device of the cylinder valve servo of the hydro-turbine generator set according to claim 6 is characterized in that: 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.

8. The synchronous chain tensioning device of the cylinder valve servo of the hydro-turbine generator set according to claim 1 is characterized in that: It includes a second screw rod, which is arranged between the first slide plate and the second slide plate, one end of the second screw rod is rotationally 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 rotationally connected to the second slide plate, and the other end of the second screw rod is threadedly connected to the first slide plate.

9. The synchronous chain tensioning device of the cylinder valve servo of the hydro-turbine generator set according to claim 8 is 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.

10. The synchronous chain tensioning device of the cylinder valve servo of the hydro-generator set according to claim 1, characterized in that: The second slide plate is provided with a vertical rod, the stroke adjustment rod is arranged on the vertical rod and is positionally adjustable along the moving direction of the second slide plate, and the stroke switch is fixedly arranged on the frame corresponding to the stroke adjustment rod.

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