Large-diameter double-layer sealing surface double-stage intelligent adjusting sealing device and system

Abstract

The large-diameter double-layer sealing surface double-stage intelligent adjusting sealing device comprises an anti-wear rotating ring and a fixing support which are installed on a water turbine main shaft, and a sealing adjusting assembly is installed between the anti-wear rotating ring and the fixing support; the sealing adjusting assembly comprises a support cylinder, a support is fixed to the fixing support, the support cylinder is arranged on the main shaft of the water turbine in a sleeving mode, a sealing ring fixing frame is installed on the outer wall of the support cylinder, the bottom of the sealing ring fixing frame is connected with a sealing ring, and the sealing ring is installed on an abrasion-resistant rotating ring. A fixing cylinder is connected to the support cylinder, the fixing cylinder is sleeved with a sealing ring fixing frame, the sealing ring fixing frame is located in the fixing cylinder, an inflation part is arranged between the inner wall of the fixing cylinder and the outer wall of the sealing ring fixing frame, and an air pump is connected to the inflation part; the sealing adjusting assembly is connected with a monitoring assembly, and the monitoring assembly obtains abrasion data to regulate and control the sealing adjusting assembly; according to the device, the service life of the sealing element is prolonged, and the maintenance cost and the downtime are reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of water turbine seals, and in particular to a large-diameter double-layer sealing surface double-stage intelligent adjustment sealing device and system. Background Art

[0002] A water turbine is a power machine that converts the energy of water flow into rotational mechanical energy. Most modern water turbines are installed in hydropower stations. They divert water from the upstream reservoir to the water turbine through a water diversion pipe, thereby driving the turbine runner to rotate and driving the generator to generate electricity.

[0003] The turbine main shaft seal block is the most important sealing device between the fixed parts and the rotating parts of the turbine. It is installed on the inner circular surface of the lower part of the top cover to effectively prevent the tail water from overflowing from the gap between the main shaft and the top cover during the use of the turbine, prevent the guide bearing and the top cover of the turbine from being flooded, and ensure the normal operation of the guide bearing and the unit.

[0004] The turbine works in a sediment-rich watershed for a long time. Due to the effects of sediment, the main shaft mechanical seal wears faster, which in turn causes its thickness to become thinner. If the wear of the main shaft mechanical seal reaches a critical point, it will affect its sealing effect on the turbine, which will directly affect the safety of the unit operation.

[0005] During the operation of the unit, water leakage due to failure of the main shaft seal will cause accidents such as flooding of the water-guide bearing and the machine pit, causing losses to the power station production. New seal blocks need to be replaced in time to ensure the sealing effect; Due to the special position of the turbine main shaft seal, the existing turbine needs to shut down the unit after running for a period of time before the main shaft seal ring can be adjusted and replaced, which affects the power generation during the flood season. During the operation of the turbine, the working condition and wear condition of the main shaft seal cannot be directly measured, resulting in high maintenance costs. Summary of the invention

[0006] In order to solve the problem that the existing turbine cannot adjust the seal according to the wear of the main shaft sealing ring during operation, and the turbine needs to be shut down for adjustment and replacement, resulting in high maintenance costs and affecting the power generation during the flood season, the present invention provides a large-diameter double-layer sealing surface double-stage intelligent adjustment sealing device and system.

[0007] To achieve the above object, the present invention provides the following technical solutions: The present invention proposes a large-diameter double-layer sealing surface double-stage intelligent adjustment sealing device, comprising an anti-wear rotating ring and a fixed bracket installed on the main shaft of the turbine, and a sealing adjustment component is installed between the anti-wear rotating ring and the fixed bracket; The sealing adjustment assembly comprises a bracket tube, the top of which is fixed to the inner wall of the fixed bracket, the bracket tube is sleeved on the main shaft of the turbine, a sealing ring fixing frame is installed on the outer wall of the bracket tube, a sealing ring is connected to the bottom of the sealing ring fixing frame, and the sealing ring is installed on the anti-wear rotating ring; The bracket tube is connected to a fixing tube, the bottom of the fixing tube is sleeved with the top of the sealing ring fixing frame, and the sealing ring fixing frame is located in the fixing tube, an inflatable member is provided between the inner wall of the fixing tube and the outer wall of the sealing ring fixing frame, and the inflatable member is connected to an air pump; The sealing adjustment component is connected to a monitoring component, and the monitoring component obtains wear data to regulate the sealing adjustment component.

[0008] Preferably, the sealing ring comprises a split sealing ring 2 and a split sealing ring 1, the split sealing ring 2 and the split sealing ring 1 are connected to the sealing ring fixing frame above, the split sealing ring 2 is located inside the split sealing ring 1, and the split sealing ring 1 and the split sealing ring 2 are concentrically arranged.

[0009] Preferably, the sealing ring fixing frame comprises a sealing ring fixing frame 2 and a sealing ring fixing frame 1, one side of the sealing ring fixing frame 2 and the sealing ring fixing frame 1 is connected to the outer wall of the fixing cylinder, the bottom end face of the sealing ring fixing frame 2 is connected to the top end face of the petal sealing ring 2, and the bottom end face of the sealing ring fixing frame 1 is connected to the top end face of the petal sealing ring 1; The fixing tube is connected to the sealing ring fixing frame 1 and the petal sealing ring 2 near their tops, and the inflatable component is installed between the outer walls of the sealing ring fixing frame 1 and the petal sealing ring 2 and the inner wall of the fixing tube respectively.

[0010] Preferably, the fixing tube comprises a fixing tube 2 and a fixing tube 1, the tops of the fixing tube 2 and the fixing tube 1 are mounted on the bracket tube; and the bottom of the fixing tube 2 is sleeved on the sealing ring fixing frame 2, and the fixing tube is sleeved on the sealing ring fixing frame 1; A fixing ring 2 is arranged inside the fixing cylinder 2, and the inner wall of the fixing ring 2 is in contact with the outer wall of the fixing cylinder 2; A fixing ring 1 is arranged inside the fixing cylinder 1, and the inner wall of the fixing ring 1 is in contact with the outer wall of the fixing cylinder 1; The inflatable component is installed between the inner wall of the fixing cylinder 1 and the outer wall of the sealing ring fixing frame 1, and between the inner wall of the fixing cylinder 2 and the sealing ring fixing frame 2.

[0011] Preferably, the inflatable member includes airbag 1, airbag 2, airbag 3 and airbag 4; The airbag 1 is installed between the top end surface of the second sealing ring fixing frame and the second inner wall of the fixing tube; the airbag 4 is installed between the second side wall of the second sealing ring fixing frame and the second inner wall of the fixing tube; the airbag 2 is installed between the top end surface of the first sealing ring fixing frame and the first inner wall of the fixing tube; the airbag 3 is installed between the side wall of the sealing ring fixing frame and the first inner wall of the fixing tube; A pad is provided between the airbag 1 and the sealing ring fixing frame 2, and between the airbag 2 and the sealing ring fixing frame 1; The airbag one, the airbag two, the airbag three and the airbag four are connected to the air pump via an air guide tube, and the monitoring component is installed on the air guide tube.

[0012] Preferably, the pad includes a second flat plate and a first flat plate, the first flat plate is installed between the first airbag and the second sealing ring fixing frame; the second flat plate is installed between the second airbag and the first sealing ring fixing frame.

[0013] Preferably, the support tube comprises a support tube 1 and a support tube 2, the support tube 2 is sleeved outside the support tube 1, and a connecting plate is connected near the top of the support tube 1 and the support tube 2; The outer wall of the bracket tube 2 is located at the top end thereof and is fixed to the fixed bracket, and the outer wall of the bracket tube 2 is located below the fixed bracket and is connected to the fixed tube 1; The fixing tube 2 is connected to the position of the outer wall of the bracket tube 1 corresponding to the fixing tube 1; The first liquid guide hole is provided on the bracket tube 1, the sealing ring fixing frame 2 and the split sealing ring 2; the second liquid guide hole is provided on the bracket tube 2, the sealing ring fixing frame 1 and the split sealing ring 1; A liquid guide tube is provided at the top of the first support tube at the port position of the first liquid guide hole and at the top of the second support tube at the port position of the second liquid guide hole, respectively. The liquid guide tube is externally connected to a lubricating water conveyor, and the monitoring component is installed on the liquid guide tube.

[0014] Preferably, O-rings are provided between the bracket tube and the fixed bracket, between the bracket tube and the sealing ring fixing frame, between the bracket tube and the fixed tube, and between the sealing ring fixing frame and the fixed tube.

[0015] Preferably, the monitoring assembly includes a pressure sensor, an automatic switch, a wear measurement device, a leakage measurement device and a pressure transmitter; The wear measurement device is respectively installed on the support tube 1 and the sealing ring fixing frame 1, and is used to measure the wear of the petal sealing ring 1 and the petal sealing ring 2; The leakage measuring device is respectively installed on the sealing ring fixing frame 2 and the bracket tube 2, and is used to measure the leakage between the petal sealing ring 1 and the petal sealing ring 2; The pressure sensor is installed on the air guide pipe connecting the inflatable piece and the air pump, and the pressure transmitter is installed on the bottom of the inflatable piece. The pressure sensor and the pressure transmitter are used to detect the pressure value of the inflatable piece; The automatic switch is installed on the liquid guide tube and the air guide tube, and is used to control the opening or closing of the liquid guide tube and the air guide tube.

[0016] The present invention proposes a large-diameter double-layer sealing surface double-stage intelligent adjustment sealing system, which uses the above-mentioned large-diameter double-layer sealing surface double-stage intelligent adjustment sealing device, including a signal identifier, a processor, a drive controller and a time-sharing starter; The signal identifier is used to obtain the water flow sediment content signal, the turbine start and stop signal and the upstream and downstream water level difference signal through the monitoring component; The processor is used to analyze the water flow sediment content signal, the turbine start and stop signal and the upstream and downstream water level difference signal to generate a pressure adjustment signal for the inflatable member; The drive controller is used to control the time-sharing starter to regulate the pressure in the inflatable member based on the pressure regulation signal.

[0017] Compared with the prior art, the present invention has the following beneficial technical effects: The present invention proposes a large-diameter double-layer sealing surface and two-stage intelligent adjustment sealing device. By setting a two-stage sealing structure, the device can effectively meet the sealing requirements in high head and high mud and sand environments; the inflatable parts and air pumps in the sealing adjustment component enable the compression force of the sealing ring to be dynamically adjusted according to the actual working conditions, avoiding the excessive wear caused by excessive compression force or leakage caused by insufficient compression force in traditional sealing devices; by monitoring the wear data in real time, the system can automatically adjust the pressure of the inflatable parts to ensure that the sealing effect is always in the best state; in addition, the structure of the bracket tube and the fixed tube enables the sealing ring fixing frame to be firmly installed on the anti-wear rotating ring, further enhancing the stability and durability of the sealing device, and the setting of the lubrication waterway and the time-sharing control logic can provide sufficient lubrication in a high mud and sand environment, reducing the damage to the sealing surface caused by friction and scouring. Overall, the device not only extends the service life of the seal, but also significantly reduces maintenance costs and downtime, and improves the efficiency and safety of turbine operation.

[0018] By using various sensors to obtain parameters such as the unit's water head, start-up and shutdown, leakage, and sealing compression force, the intelligent adjustment system comprehensively analyzes the unit's operating status. The control system automatically adjusts the working compression force of the sealing ring according to the needs of the unit, and can automatically switch to single-stage or double-stage sealing to adapt to the unit's water head changes and start-up and shutdown working conditions. This can not only ensure the sealing effect, but also reduce friction and wear and extend the service life.

[0019] Furthermore, in the present device, the sealing compression force between the split sealing rings and the anti-wear rotating ring is adjusted by an inflatable piece, so that the bottom end face of the split sealing ring is always in contact with the upper end face of the anti-wear rotating ring, thereby reducing the sealing surface gap caused by deformation of the sealing surface, adapting to the deformation of the sealing surface, and reducing leakage.

[0020] The present invention also proposes a large-diameter double-layer sealing surface and two-stage intelligent adjustable sealing system. This system backwashes the sealing surface by controlling the lubricating water and the lifting and lowering of the double-layer sealing surface, thereby removing sand and gravel that enter between the sealing surfaces, reducing the wear of the sealing surface by silty river water, ensuring the sealing effect, reducing wear leakage and ensuring the safety of the unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the front cross-sectional structure of a large-diameter double-layer sealing surface double-stage intelligent adjustable sealing device proposed by the present invention; Figure 2 for Figure 1 The enlarged view of point A in the middle; Figure 3 for Figure 1 The enlarged view of point B in the middle; Figure 4 A top view of a large-diameter double-layer sealing surface double-stage intelligent adjustable sealing device proposed by the present invention; Figure 5 A connection diagram of components in a large-diameter double-layer sealing surface double-stage intelligent adjustment sealing system proposed by the present invention; In the attached drawings: 30, water flow sediment content signal identifier; 40, turbine governor start-stop signal identifier; 50, water level difference signal identifier; 60, processor; 70, first drive controller; 80, second drive controller; 71, time-sharing starter 1; 72, time-sharing starter 2; 73, time-sharing starter 3; 74, time-sharing starter 4; 81, time-sharing starter 5; 82, time-sharing starter 6; 101, wear amount measuring device 2; 102, leakage amount measuring device 2; 103, pressure sensor 1; 104, wear amount measuring device 1; 105, leakage amount measuring device 1; 106, anti-wear rotating ring; 107, petal sealing ring 1; 108, pressure sensor 2; 109, pressure sensor 3; 110, automatic switch 1; 111, automatic switch 2; 112, automatic switch 3 ;113, automatic switch four;114, automatic switch five;115, pressure sensor four;116, automatic switch six;117, automatic switch seven;118, automatic switch eight;119, automatic switch nine;120, pressure sensor five;121, automatic switch ten;122, bracket tube one;123, flat plate one;124, airbag one;125, pressure transmitter one;126, connecting plate;127, fixed bracket;128, fixed tube one;129, airbag two;130, flat plate two;131, pressure transmitter two;132, airbag three;133, fixed ring one;134, sealing ring fixing frame one;135, bracket tube two;136, fixed tube two;137, airbag four;138, fixed ring two;139, sealing ring fixing frame two;140, petal sealing ring two. DETAILED DESCRIPTION

[0022] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0023] 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.

[0024] 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 one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0025] 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 connection; it can be a mechanical connection, an electrical connection, or a communication; 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. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0027] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0028] The present invention proposes a large-diameter double-layer sealing surface double-stage intelligent adjustment sealing device, such as Figure 1~Figure 4 As shown, it includes an anti-wear rotating ring 106 and a fixed bracket 127 installed on the main shaft of the turbine, and a sealing adjustment component is installed between the anti-wear rotating ring 106 and the fixed bracket 127; The sealing adjustment assembly includes a support tube, the top end of the support tube is fixed to the inner wall of the fixed support 127, and the support tube is sleeved on the main shaft of the turbine, a sealing ring fixing frame is installed on the outer wall of the support tube, a sealing ring is connected to the bottom end surface of the sealing ring fixing frame, and the sealing ring is installed on the anti-wear rotating ring 106; The bracket tube is connected to a fixed tube, the bottom of the fixed tube is fitted with the top of the sealing ring fixing frame, and the sealing ring fixing frame is located in the fixed tube, and an inflatable part is arranged between the inner wall of the fixed tube and the outer wall of the sealing ring fixing frame, and the inflatable part is connected to an air pump; the sealing adjustment component is connected to a monitoring component, and the monitoring component obtains wear data to adjust the sealing adjustment component. The device forms a two-stage adjustment sealing surface through a sealing ring and an anti-wear rotating ring 106, and then a high-pressure medium enters the inflatable part through a pipeline, and the sealing ring is made to cling to the sealing surface of the anti-wear rotating ring through the expansion of the gas to prevent leakage of the medium. The monitoring component is used to control the pressing force of the adjustment sealing surface of each inflatable part, and the function of adjusting the pressing force of the sealing surface and the level of the sealing surface according to the pressure of the sealed medium is realized by detecting the seal wear, pressing force and leakage. The situation that the sealing surface wears too fast due to excessive pressing force is solved to prevent the occurrence of safety accidents.

[0029] like Figure 1~Figure 4 As shown, the sealing ring includes a petal sealing ring 2 140 and a petal sealing ring 107, the upper end faces of the petal sealing ring 2 140 and the petal sealing ring 107 are connected to a sealing ring fixing frame, the petal sealing ring 2 140 is located inside the petal sealing ring 107, and the petal sealing ring 107 and the petal sealing ring 2 140 are concentrically arranged, and the heights of the petal sealing ring 107 and the petal sealing ring 2 140 are flush.

[0030] like Figure 1~Figure 4 As shown, the sealing ring fixing frame includes a sealing ring fixing frame 139 and a sealing ring fixing frame 134. The sealing ring fixing frame 139 and the sealing ring fixing frame 134 are concentrically arranged, and the sealing ring fixing frame 139 is sleeved on the main shaft of the turbine. The sealing ring fixing frame 139 and the sealing ring fixing frame 134 are flush in height. The inner end faces of the sealing ring fixing frame 139 and the sealing ring fixing frame 134 are connected to the outer wall of the fixed cylinder. The bottom end face of the sealing ring fixing frame 139 is connected to the top end face of the petal sealing ring 140. The bottom end face of the sealing ring fixing frame 134 is connected to the top end face of the petal sealing ring 134 to prevent water leakage. The sealing ring fixing frame 134 and the petal sealing ring 140 are connected to the fixed cylinder at a position close to their tops. The outer walls of the sealing ring fixing frame 134 and the petal sealing ring 140 are respectively connected to the installation inflatable parts between the inner wall of the fixed cylinder.

[0031] like Figure 1~Figure 3As shown, the fixed cylinder includes a fixed cylinder 136 and a fixed cylinder 128, and the tops of the fixed cylinder 136 and the fixed cylinder 128 are installed on the bracket cylinder; and the bottom of the fixed cylinder 136 is sleeved on the outer wall of the sealing ring fixing frame 139 near its top end, and the fixed cylinder 128 is sleeved on the outer wall of the sealing ring fixing frame 134 near its top end; the fixed cylinder 136 is connected to a fixed ring 138 near its bottom end by screws, and the inner wall of the fixed ring 138 fits with the outer wall of the fixed cylinder 136; the fixed cylinder 128 is connected to a fixed ring 133 near its bottom end by screws, and the inner wall of the fixed ring 133 fits with the outer wall of the fixed cylinder 128; an inflatable piece is installed between the inner wall of the fixed cylinder 128 and the outer wall of the sealing ring fixing frame 134, and between the inner wall of the fixed cylinder 136 and the sealing ring fixing frame 139.

[0032] like Figure 1~Figure 4 As shown, the inflatable member includes airbag 1 124, airbag 2 129, airbag 3 132 and airbag 4 137; airbag 1 124 is installed between the top end surface of the sealing ring fixing frame 2 139 and the inner wall of the fixing cylinder 2 136; airbag 4 137 is installed between the side wall of the sealing ring fixing frame 2 139 and the inner wall of the fixing cylinder 2 136, and airbag 4 137 is located above the fixing ring 2 138; airbag 2 129 is installed between the top end surface of the sealing ring fixing frame 1 134 and the inner wall of the fixing cylinder 1 128; airbag 3 132 is installed on the sealing ring fixing frame Between the side wall of airbag 1 134 and the inner wall of fixed tube 128, and airbag three 132 is located above fixed ring 133; pads are provided between airbag 1 124 and sealing ring fixing frame 2 139, and between airbag 2 129 and sealing ring fixing frame 1 134; airbag 1 124, airbag 2 129, airbag three 132 and airbag four 137 are connected to the air pump through an air guide tube, and a monitoring component is installed on the air guide tube, through which the gas pressure in airbag 1 124, airbag 2 129, airbag three 132 and airbag four 137 is detected and controlled, and the seal is adjusted.

[0033] like Figure 1~Figure 4 As shown, the pad includes a second flat plate 130 and a first flat plate 123. The first flat plate 123 is installed between the first airbag 124 and the second sealing ring fixing frame 139; the second flat plate 130 is installed between the second airbag 129 and the first sealing ring fixing frame 134.

[0034] like Figure 1~Figure 4As shown, the bracket tube includes a bracket tube 122 and a bracket tube 2 135, and the bracket tube 2 135 is sleeved on the outside of the bracket tube 122. The bracket tube 122 and the bracket tube 2 135 are connected to the connecting plate 126 near the top through a threaded rod, and the upper end surfaces of the connecting plate 126, the bracket tube 122 and the bracket tube 2 135 are flush; the outer wall of the bracket tube 2 135 is located at the top end thereof and is fixed to the inner side wall of the fixed bracket 127 by screws, and the upper end of the bracket tube 2 135 is flush with the upper end surface of the fixed bracket 127, and the outer wall of the bracket tube 2 135 is located at the lower end of the fixed bracket 127 The fixing cylinder 128 is connected by screws; the fixing cylinder 136 is connected by screws at the position corresponding to the fixing cylinder 128 on the outer wall of the bracket cylinder 122; the first liquid guide hole is provided on the bracket cylinder 122, the sealing ring fixing frame 139 and the petal sealing ring 140; the second liquid guide hole is provided on the bracket cylinder 135, the sealing ring fixing frame 134 and the petal sealing ring 107; liquid guide tubes are respectively provided at the port position of the first liquid guide hole on the top of the bracket cylinder 122 and the port position of the second liquid guide hole on the top of the bracket cylinder 135, the liquid guide tubes are externally connected to the lubricating water conveyor, and the monitoring components are installed on the liquid guide tubes.

[0035] like Figure 1~Figure 4 As shown, O-rings are provided between the bracket tube and the fixed bracket 127, between the bracket tube and the sealing ring fixing frame, between the bracket tube and the fixed tube, and between the sealing ring fixing frame and the fixed tube; the O-rings are used to increase the sealing performance between the bracket tube and the fixed bracket 127, between the bracket tube and the sealing ring fixing frame, between the bracket tube and the fixed tube, and between the sealing ring fixing frame and the fixed tube.

[0036] The monitoring component includes a pressure sensor, an automatic switch, a wear measurement device, a leakage measurement device and a pressure transmitter; the wear measurement device is respectively installed on the bracket tube 122 and the sealing ring fixing frame 134, that is, the wear measurement device includes a wear measurement device 2 101 and a wear measurement device 104, the wear measurement device 2 101 is installed on the bottom end surface of the bracket tube 122 at a position close to the inner end surface, and the wear measurement device 104 is installed on the bottom end surface of the sealing ring fixing frame 134 at a position close to the inner end surface, and the wear measurement device 2 101 and the wear measurement device 104 are used to measure the wear amount of the petal sealing ring 107 and the petal sealing ring 2 140; The leakage measuring devices are respectively installed on the sealing ring fixing frame 139 and the bracket tube 135. The leakage measuring devices include a leakage measuring device 105 and a leakage measuring device 102. The leakage measuring device 102 is installed on the bottom end surface of the sealing ring fixing frame 139 near the inner end surface. The leakage measuring device 105 is installed on the bottom end surface of the bracket tube 135 near the inner end surface. The leakage measuring device 105 and the leakage measuring device 102 are used to measure the leakage between the petal sealing ring 107 and the petal sealing ring 140. The pressure sensor is installed on the air tube connecting the inflatable part and the air pump. Specifically, the pressure sensor includes pressure sensor three 109, pressure sensor two 108, pressure sensor five 120 and pressure sensor four 115; pressure sensor three 109, pressure sensor two 108, pressure sensor five 120 and pressure sensor four 115 are installed on the air tube connected to the inflatable part, that is, pressure sensor five 120 is installed on the air tube connected to airbag one 124, pressure sensor four 115 is installed on the air tube connected to airbag four 137, pressure sensor two 108 is installed on the air tube connected to airbag two 129, and pressure sensor three 109 is installed on the air tube connected to airbag three 132; the pressure transmitter includes pressure transmitter two 131 and pressure transmitter one 125, and the pressure sensor is used to detect the pressure value of the inflatable part. The pressure sensor also includes a pressure sensor 103, which is installed on the bottom end surface of the fixed cylinder 136 and is used to detect the water pressure at the bottom end surface of the fixed cylinder 136. The pressure transmitter is installed at the bottom of the inflatable part, and the pressure transmitter includes a pressure transmitter 125 and a pressure transmitter 2 131, that is, the pressure transmitter 125 is installed on the flat plate 123, and the pressure transmitter 2 131 is installed on the flat plate 2 130. The pressure transmitter 125 and the pressure transmitter 2 131 are used to detect the pressure value of the inflatable part.

[0037] The automatic switches are installed on the liquid guide tube and the air guide tube, and the automatic switches include automatic switch one 110, automatic switch two 111, automatic switch three 112, automatic switch four 113, automatic switch five 114, automatic switch six 116, automatic switch seven 117, automatic switch eight 118, automatic switch nine 119 and automatic switch ten 121; wherein, the automatic switch one 110 is installed on the exhaust port provided on the air guide tube connected to the air bag two 129, the automatic switch four 113 is installed on the air guide tube connected to the air bag two 129 and is located on the pipeline between the exhaust port and the air pump, the automatic switch two 111 is installed on the exhaust port provided on the air guide tube connected to the air bag three 132, and the automatic switch three 112 is installed on the air guide tube connected to the air bag three 132 and is located on the pipeline between the exhaust port and the air pump. The six switches 116 are installed on the exhaust port provided on the air pipe connected to the four airbags 137, the seven automatic switches 117 are installed on the air pipe connected to the four airbags 137 and are located on the pipeline between the exhaust port and the air pump, the nine automatic switches 119 are installed on the exhaust port provided on the air pipe connected to the one airbag 124 and are located on the pipeline between the exhaust port and the air pump, and the one automatic switch 110, the two automatic switches 111, the three automatic switches 112, the four automatic switches 113, the six automatic switches 116 and the seven automatic switches 117; the eight automatic switches 118 and the nine automatic switches 119 control the conduction or closing of the air pipe, thereby controlling the gas pressure in the one airbag 124, the two airbags 129, the three airbags 132 and the four airbags 137; Automatic switch five 114 is installed on the liquid guide tubes respectively arranged at the port position of the second liquid guide hole at the top of the bracket tube two 135; automatic switch ten 121 is installed on the liquid guide tubes arranged at the port position of the first liquid guide hole at the top of the bracket tube one 122, and is used to control the conduction or closing of the liquid guide tubes, and control the amount of lubricating water input into the second liquid guide hole and the first liquid guide hole.

[0038] The present invention also proposes a large-diameter double-layer sealing surface double-stage intelligent adjustment sealing system, such as Figure 5 As shown, it includes a signal identifier, a processor, a drive controller and a time-sharing starter; A signal identifier, used to obtain water flow sediment content signals, turbine start and stop signals, and upstream and downstream water level difference signals through monitoring components; A processor, used to analyze the water flow sediment content signal, the turbine start and stop signal, and the upstream and downstream water level difference signal to generate a pressure adjustment signal for the inflatable component; A drive controller is used to control the time-sharing starter to regulate the pressure in the inflatable member based on the pressure regulation signal.

[0039] The signal identifier includes a water flow sediment content signal identifier 30, a turbine governor start / stop signal identifier 40 and a water level difference signal identifier 50; the drive controller includes a first drive controller 70 and a second drive controller 80; the time-sharing starter includes a time-sharing starter 1 71, a time-sharing starter 2 72, a time-sharing starter 3 73, a time-sharing starter 4 74, a time-sharing starter 5 81 and a time-sharing starter 6 82; The water flow sediment content signal identifier 30, the turbine governor start-stop signal identifier 40, the wear amount measuring device 2 101, the leakage amount measuring device 1 105, the wear amount measuring device 1 104 and the leakage amount measuring device 2 102 are communicatively connected to the processor 60, the processor 60 is communicatively connected to the first drive controller 70 and the second drive controller 80, the first drive controller 70 is communicatively connected to the time-sharing starter 1 71, the time-sharing starter 2 72, the time-sharing starter 3 73, the time-sharing starter 4 74, the pressure sensor 2 108, the pressure sensor 3 109, the pressure sensor 4 115, the pressure sensor 5 120 and the pressure transmitter 2 131, ... The time-sharing starter 1 71 is connected to the automatic switch 1 110 and the automatic switch 4 113 in communication, the time-sharing starter 2 72 is connected to the automatic switch 2 111 and the automatic switch 3 112 in communication, the time-sharing starter 3 73 is connected to the automatic switch 6 116 and the automatic switch 7 117 in communication, the time-sharing starter 4 74 is connected to the automatic switch 8 118 and the automatic switch 9 119 in communication, the second drive controller 80 is connected to the pressure sensor 1 103, the water level difference signal identifier 50, the time-sharing starter 5 81 and the time-sharing starter 6 82 in communication, the time-sharing starter 5 81 is connected to the automatic switch 5 114 in communication, and the time-sharing starter 6 82 is connected to the automatic switch 10 121 in communication. The water flow sediment content signal identifier 30 is used to detect the sediment content.

[0040] The following is further explained in combination with the system and the device: The turbine governor start / stop signal identifier 40 identifies the start / stop signal of the unit and sends it to the processor 60. After receiving the start signal of the unit, the processor 60 transmits it to the lubricating water valve drive control component 80. The second drive controller 80 sends a signal to the time-sharing starter five 81 and the time-sharing starter six 82. The time-sharing starter five 81 controls the automatic switch five 114 to open, and the time-sharing starter six 82 controls the automatic switch ten 121 to open. The lubricating water flows into the first liquid guide hole and the second liquid guide hole through the liquid guide pipe, and lubricates the friction pairs between the bracket tube one 122, the sealing ring fixing frame two 139 and the petal sealing ring two 140, and between the bracket tube two 135, the sealing ring fixing frame one 134 and the petal sealing ring one 107.

[0041] The water level difference signal identifier 50 identifies the water head signal of the unit and sends it to the first drive controller 70. The first drive controller 70 controls the time-sharing starter 1 71, the time-sharing starter 2 72, the time-sharing starter 3 73, and the time-sharing starter 4 74 according to the water head signal to respectively open the automatic switch 2 111, the automatic switch 4 113, the automatic switch 6 116, and the automatic switch 8 118, and close the automatic switch 1 110, the automatic switch 3 112, the automatic switch 7 117, and the automatic switch 9 119, so that the airbag 1 124 and the airbag 2 129 are inflated, and the airbag 3 132 and the airbag 4 137 are depressurized; After pressure transmitter 1 125, pressure transmitter 2 131, pressure sensor 2 108, pressure sensor 3 109, pressure sensor 4 115, and pressure sensor 5 120 respectively detect that the internal pressures of airbag 1 124, airbag 2 129, airbag 3 132, and airbag 4 137 reach the preset pressure values, the first drive controller 70 controls time-sharing starter 1 71, time-sharing starter 2 72, time-sharing starter 3 73, and time-sharing starter 4 74 to simultaneously close automatic switch 2 111, automatic switch 4 113, automatic switch 6 116, and automatic switch 8 118, so that the internal pressures of airbag 1 124, airbag 2 129, airbag 3 132, and airbag 4 137 remain stable, so that the sealing device can operate stably.

[0042] When the water head H of the unit is higher than 3 / 5 of the rated water head, and the water level difference signal identifier 50 identifies that the water head H of the unit has risen, the water level difference signal identifier 50 converts the water head H of the unit into a first water head signal and sends it to the first drive controller 70. The first drive controller 70 controls the time-sharing starter 1 71, the time-sharing starter 2 72, the time-sharing starter 3 73, and the time-sharing starter 4 74 according to the first water head signal, and simultaneously opens the automatic switch 2 111, the automatic switch 4 113, the automatic switch 6 116, and the automatic switch 8 118, and simultaneously closes the automatic switch 1 110, the automatic switch 3 112, the automatic switch 7 117, and the automatic switch 9 119, so that the airbag 1 124, the airbag 2 129, and the airbag 3 132 are depressurized; When the pressure measured by the pressure sensor 2 108 is 1 / 2 of the head pressure, and the measurement value of the leakage measuring device 2 102 is less than the allowable value, the pressure and leakage signals are transmitted to the first drive controller 70 and the processor 60, which respectively control the time-sharing starter 1 71, the time-sharing starter 2 72, the time-sharing starter 3 73, and the time-sharing starter 4 74, and at the same time close the automatic switch 2 111, the automatic switch 4 113, the automatic switch 6 116, and the automatic switch 8 118, so that the internal pressure of the airbag 1 124, the airbag 2 129, the airbag 3 132, and the airbag 4 137 remains stable, so that the sealing device can operate stably.

[0043] When the unit water head H is higher than 3 / 5 of the rated water head, and the water level difference signal identifier 50 identifies that the unit water head H decreases, the water level difference signal identifier 50 converts the unit water head H into a second water head signal and sends it to the first drive controller 70. The first drive controller 70 controls the time-sharing starter 1 71, the time-sharing starter 2 72, the time-sharing starter 3 73, and the time-sharing starter 4 74 according to the second water head signal, and simultaneously opens the automatic switch 1 110, the automatic switch 3 112, the automatic switch 7 117, and the automatic switch 9 119, and simultaneously closes the automatic switch 2 111, the automatic switch 4 113, the automatic switch 6 116, and the automatic switch 8 118, so that the airbag 1 124 and the airbag 2 12 9 is used to deflate and inflate airbag three 132 and airbag four 137. When the pressure measured by pressure sensor one 103 is H1 / 2 head pressure and the measurement value of leakage measuring device two 102 is less than the allowable value, the pressure and leakage signal are transmitted to the first drive controller 70 and the processor 60, which respectively control the time-sharing starter one 71, the time-sharing starter two 72, the time-sharing starter three 73 and the time-sharing starter four 74, and at the same time close the automatic switch one 110, the automatic switch three 112, the automatic switch seven 117 and the automatic switch nine 119, so that the internal pressure of airbag one 124, the airbag two 129, the airbag three 132 and the airbag four 137 remains stable, so that the sealing device can operate stably.

[0044] When the unit water head H is lower than 3 / 5 of the rated water head and the unit water head rises, the wear measurement device 2 101 and the leakage measurement device 1 105 measure the wear respectively, convert the measured wear into a third signal, and transmit it to the processor 60, and the processor 60 calculates the wear difference. When |L1-L2|≤L / 10, or L2-L1≥L / 10 (L1 and L2 are the first and second level seal wear respectively; L is the effective thickness of the sealing ring), the processor 60 sends the fourth signal to the first drive controller 70, and the first drive controller 70 controls the time-sharing starter 1 71, the time-sharing starter 2 72, the time-sharing starter 3 73, and the time-sharing starter 4 74 according to the fourth signal, and simultaneously opens the automatic switch 2 111, the automatic switch 4 113, the automatic switch 7 117, and the automatic switch 9 119, and simultaneously closes the automatic switch 1 110, the automatic switch 3 112, the automatic switch 6 116, and the automatic switch 8 118, so that the airbag 2 129 and the airbag 129 are closed. The airbag 4 137 is inflated to release the pressure of the airbag 1 124 and the airbag 3 132. When the measured values ​​of the leakage measuring device 2 102 and the leakage measuring device 1 105 are less than the allowable values, the pressure and leakage signals are transmitted to the first drive controller 70 and the processor 60, and the time-sharing starter 1 71, the time-sharing starter 2 72, the time-sharing starter 3 73, and the time-sharing starter 4 74 are controlled respectively, and the automatic switch 2 111, the automatic switch 4 113, the automatic switch 7 117, and the automatic switch 9 119 are closed at the same time, so that the internal pressure of the airbag 1 124, the airbag 2 129, the airbag 3 132, and the airbag 4 137 is kept stable, so that the sealing device can operate stably; When L2-L1≥L / 10, the fifth signal is transmitted to the first drive controller 70, and the first drive controller 70 controls the time-sharing starter 1 71, the time-sharing starter 2 72, the time-sharing starter 3 73, and the time-sharing starter 4 74 according to the fifth signal, and simultaneously opens the automatic switch 110, the automatic switch 3 112, the automatic switch 6 116, and the automatic switch 8 118, and closes the automatic switch 2 111, the automatic switch 4 113, the automatic switch 7 117, and the automatic switch 9 119, so that the airbag 1 124 and the airbag 3 132 are inflated, and the airbag 2 1 29 and airbag four 137 release pressure, when the leakage measuring device two 102 measurement value is less than the allowable value, the pressure and leakage signal are transmitted to the first drive controller 70 and the processor 60, respectively controlling the time-sharing starter one 71, the time-sharing starter two 72, the time-sharing starter three 73, the time-sharing starter four 74, and the automatic switch one 110, the automatic switch three 112, the automatic switch six 116, the automatic switch eight 118, so that the internal pressure of the airbag one 124, the airbag two 129, the airbag three 132, and the airbag four 137 remains stable, so that the sealing device can operate stably; During operation, when the leakage measuring device 2 102 and the leakage measuring device 1 105 measure a leakage exceeding the allowable value, the leakage signal first drives the controller 70 and the processor 60, and the first driving controller 70 controls the time-sharing starter 1 71, the time-sharing starter 2 72, the time-sharing starter 3 73, and the time-sharing starter 4 74 according to the leakage signal, and simultaneously opens the automatic switch 2 111, the automatic switch 4 113, the automatic switch 6 116, and the automatic switch 8 118, and simultaneously closes the automatic switch 1 110, the automatic switch 3 112, the automatic switch 7 117, and the automatic switch 9 119, so that the airbag 1 124 and the airbag 2 129 are inflated, and the airbag 3 132 and the airbag 4 137 are depressurized; After pressure transmitter 1 125, pressure transmitter 2 131, pressure sensor 2 108, pressure sensor 3 109, pressure sensor 4 115, and pressure sensor 5 120 respectively detect that the internal pressures of airbag 1 124, airbag 2 129, airbag 3 132, and airbag 4 137 reach the preset pressure values, the first drive controller 70 controls time-sharing starter 1 71, time-sharing starter 2 72, time-sharing starter 3 73, and time-sharing starter 4 74 to simultaneously close automatic switch 2 111, automatic switch 4 113, automatic switch 6 116, and automatic switch 8 118, so that the internal pressures of airbag 1 124, airbag 2 129, airbag 3 132, and airbag 4 137 remain stable, so that the sealing device can operate stably.

[0045] During operation, when the water flow sediment content signal identifier 30 detects that the sediment content exceeds the design value, and the leakage or pressure is abnormal, the sediment content signal is transmitted to the first drive controller 70 and the processor 60. The first drive controller 70 controls the time-sharing starter 1 71, the time-sharing starter 2 72, the time-sharing starter 3 73, and the time-sharing starter 4 74 according to the sediment content signal, and simultaneously opens the automatic switch 1 110, the automatic switch 3 112, the automatic switch 7 117, and the automatic switch 9 119, and simultaneously closes the automatic switch 2 111 and the automatic switch 4 113. , automatic switch six 116 and automatic switch eight 118, so that airbag one 124 and airbag two 129 are deflated, and airbag three 132 and airbag four 137 are inflated; when the measurement value of the leakage measurement component two 102 is greater than 10 times the designed leakage, the detection signal is transmitted to the second drive controller 80 and the processor 60, and the second drive controller 80 sends a signal to the time-sharing starter five 81 and the time-sharing starter six 82, and the time-sharing starter five 81 and the time-sharing starter six 82 open the automatic switch five 114 and the automatic switch ten 121, increasing the lubrication water flowing into the first guide hole and The second liquid guide hole is used to flush the mud and sand in the friction pair connected to the first liquid guide hole and the second liquid guide hole for 20 seconds; after the flushing is completed, the first drive controller 70 controls the time-sharing starter 1 71, the time-sharing starter 2 72, the time-sharing starter 3 73, and the time-sharing starter 4 74 according to the water head signal, opens the automatic switch 2 111, the automatic switch 4 113, the automatic switch 6 116, and the automatic switch 8 118, and closes the automatic switch 1 110, the automatic switch 3 112, the automatic switch 7 117, and the automatic switch 9 119, so that the airbag 1 124 and the airbag 2 129 are inflated. Gas is used to release the pressure on airbag three 132 and airbag four 137. After they return to normal, the first drive controller 70 controls the time-sharing starter one 71, the time-sharing starter two 72, the time-sharing starter three 73 and the time-sharing starter four 74 according to the water head signal, and closes the automatic switch two 111, the automatic switch four 113, the automatic switch six 116 and the automatic switch eight 118, so that the internal pressures of airbag one 124, the airbag two 129, the airbag three 132 and the airbag four 137 remain stable, and the automatic switch five 114 and the automatic switch ten 121 remain in a normal state, so that the sealing device can operate stably.

[0046] The turbine governor start / stop signal identifier 40 identifies the start / stop signal of the unit and sends it to the processor 60. After receiving the start signal of the unit, the processor 60 transmits it to the first drive controller 70. The first drive controller 70 controls the time-sharing starter 1 71, the time-sharing starter 2 72, the time-sharing starter 3 73, and the time-sharing starter 4 74 according to the water head signal, opens the automatic switch 2 111, the automatic switch 4 113, the automatic switch 6 116, and the automatic switch 8 118, and closes the automatic switch 1 110, the automatic switch 3 112, and the automatic switch 7 114. 7. Automatic switch nine 119 inflates airbag one 124 and airbag two 129, and relieves pressure on airbag three 132 and airbag four 137. When leakage measuring device two 102 and leakage measuring device one 105 measure the leakage within the allowable value, the leakage signal is transmitted to the second drive controller 80. The second drive controller 80 sends a signal to the time-sharing starter five 81 and the time-sharing starter six 82. The time-sharing starter five 81 and the time-sharing starter six 82 close the automatic switch five 114 and the automatic switch ten 121, and the seal enters the shutdown state.

[0047] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0048] In addition, it should be understood that although this specification is described in accordance with the implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation modes that can be understood by those skilled in the art. The above content is only to illustrate the technical idea of ​​the present invention, and cannot be used to limit the protection scope of the present invention. Any changes made on the basis of the technical solution according to the technical idea proposed by the present invention shall fall within the protection scope of the claims of the present invention.

Claims

1. A large-diameter double-layer sealing surface double-stage intelligent adjustment sealing device, characterized in that: It comprises an anti-wear rotating ring (106) and a fixed bracket (127) mounted on a main shaft of a water turbine, wherein a sealing adjustment component is installed between the anti-wear rotating ring (106) and the fixed bracket (127); The sealing adjustment assembly comprises a bracket tube, the top of the bracket tube is fixed to the inner wall of the fixed bracket (127), the bracket tube is sleeved on the main shaft of the turbine, a sealing ring fixing frame is installed on the outer wall of the bracket tube, the bottom of the sealing ring fixing frame is connected to a sealing ring, and the sealing ring is installed on the anti-wear rotating ring (106); The bracket tube is connected to a fixing tube, the bottom of the fixing tube is sleeved with the top of the sealing ring fixing frame, and the sealing ring fixing frame is located in the fixing tube, an inflatable member is provided between the inner wall of the fixing tube and the outer wall of the sealing ring fixing frame, and the inflatable member is connected to an air pump; The sealing adjustment component is connected to a monitoring component, and the monitoring component obtains wear data to regulate the sealing adjustment component.

2. A large-diameter double-layer sealing surface double-stage intelligent adjustment sealing device according to claim 1, characterized in that: The sealing ring comprises a petal sealing ring 2 (140) and a petal sealing ring 1 (107); the petal sealing ring 2 (140) and the petal sealing ring 1 (107) are connected to the sealing ring fixing frame above; the petal sealing ring 2 (140) is located inside the petal sealing ring 1 (107); and the petal sealing ring 1 (107) and the petal sealing ring 2 (140) are concentrically arranged.

3. A large-diameter double-layer sealing surface double-stage intelligent adjustment sealing device according to claim 2, characterized in that: The sealing ring fixing frame comprises a sealing ring fixing frame 2 (139) and a sealing ring fixing frame 1 (134); one side of the sealing ring fixing frame 2 (139) and the sealing ring fixing frame 1 (134) are connected to the outer wall of the fixing tube; the bottom end face of the sealing ring fixing frame 2 (139) is connected to the top end face of the petal sealing ring 2 (140); and the bottom end face of the sealing ring fixing frame 1 (134) is connected to the top end face of the petal sealing ring 1 (134); The sealing ring fixing frame 1 (134) and the petal sealing ring 2 (140) are connected to the fixing tube at positions near their tops, and the inflatable component is installed between the outer walls of the sealing ring fixing frame 1 (134) and the petal sealing ring 2 (140) and the inner wall of the fixing tube.

4. A large-diameter double-layer sealing surface double-stage intelligent adjustment sealing device according to claim 3, characterized in that: The fixed tube comprises a second fixed tube (136) and a first fixed tube (128), the tops of the second fixed tube (136) and the first fixed tube (128) are mounted on the bracket tube; the bottom of the second fixed tube (136) is sleeved on the second sealing ring fixing frame (139), and the first fixed tube (128) is sleeved on the first sealing ring fixing frame (134); A second fixing ring (138) is disposed inside the second fixing cylinder (136), and the inner wall of the second fixing ring (138) is in contact with the outer wall of the second fixing cylinder (136); A fixing ring 1 (133) is disposed inside the fixing cylinder 1 (128), and the inner wall of the fixing ring 1 (133) is in contact with the outer wall of the fixing cylinder 1 (128); The inflatable component is installed between the inner wall of the fixing cylinder 1 (128) and the outer wall of the sealing ring fixing frame 1 (134), and between the inner wall of the fixing cylinder 2 (136) and the sealing ring fixing frame 2 (139).

5. A large-diameter double-layer sealing surface double-stage intelligent adjustment sealing device according to claim 4, characterized in that: The inflatable member includes airbag 1 (124), airbag 2 (129), airbag 3 (132) and airbag 4 (137); The airbag 1 (124) is installed between the top end surface of the sealing ring fixing frame 2 (139) and the inner wall of the fixing tube 2 (136); the airbag 4 (137) is installed between the side wall of the sealing ring fixing frame 2 (139) and the inner wall of the fixing tube 2 (136); the airbag 2 (129) is installed between the top end surface of the sealing ring fixing frame 1 (134) and the inner wall of the fixing tube 1 (128); the airbag 3 (132) is installed between the side wall of the sealing ring fixing frame 1 (134) and the inner wall of the fixing tube 1 (128); A pad is provided between the airbag 1 (124) and the sealing ring fixing frame 2 (139), and between the airbag 2 (129) and the sealing ring fixing frame 1 (134); The airbag one (124), the airbag two (129), the airbag three (132) and the airbag four (137) are connected to the air pump via an air guide tube, and the monitoring component is installed on the air guide tube.

6. A large-diameter double-layer sealing surface double-stage intelligent adjustment sealing device according to claim 5, characterized in that: The pad includes a second flat plate (130) and a first flat plate (123), wherein the first flat plate (123) is installed between the first airbag (124) and the second sealing ring fixing frame (139); and the second flat plate (130) is installed between the second airbag (129) and the first sealing ring fixing frame (134).

7. A large-diameter double-layer sealing surface double-stage intelligent adjustment sealing device according to claim 4, characterized in that: The support tube comprises a support tube 1 (122) and a support tube 2 (135), wherein the support tube 2 (135) is sleeved outside the support tube 1 (122), and a connecting plate (126) is connected to a position near the top of the support tube 1 (122) and the support tube 2 (135); The outer wall of the second bracket tube (135) is fixed to the fixed bracket (127) at a position at its top end, and the outer wall of the second bracket tube (135) is connected to the first fixed tube (128) at a position below the fixed bracket (127); The second fixing tube (136) is connected to a position on the outer wall of the first bracket tube (122) corresponding to the first fixing tube (128); The first support tube (122), the second sealing ring fixing frame (139) and the second split sealing ring (140) are provided with a first liquid guide hole; the second support tube (135), the first sealing ring fixing frame (134) and the first split sealing ring (107) are provided with a second liquid guide hole; A liquid guide tube is provided at the top of the first support tube (122) at the port position of the first liquid guide hole and at the top of the second support tube (135) at the port position of the second liquid guide hole, respectively. The liquid guide tube is externally connected to a lubricating water conveyor, and the monitoring component is installed on the liquid guide tube.

8. The large-diameter double-layer sealing surface double-stage intelligent adjustment sealing device according to claim 1 is characterized in that: O-rings are provided between the bracket tube and the fixed bracket (127), between the bracket tube and the sealing ring fixing frame, between the bracket tube and the fixing tube, and between the sealing ring fixing frame and the fixing tube.

9. A large-diameter double-layer sealing surface double-stage intelligent adjustment sealing device according to claim 7, characterized in that: The monitoring assembly includes a pressure sensor, an automatic switch, a wear measurement device, a leakage measurement device and a pressure transmitter; The wear measurement device is respectively mounted on the support tube 1 (122) and the sealing ring fixing frame 1 (134), and is used to measure the wear of the petal sealing ring 1 (107) and the petal sealing ring 2 (140); The leakage measuring device is respectively mounted on the second sealing ring fixing frame (139) and the second bracket tube (135), and is used to measure the leakage between the first petal sealing ring (107) and the second petal sealing ring (140); The pressure sensor is installed on the air guide pipe connecting the inflatable piece and the air pump, and the pressure transmitter is installed on the bottom of the inflatable piece. The pressure sensor and the pressure transmitter are used to detect the pressure value of the inflatable piece; The automatic switch is installed on the liquid guide tube and the air guide tube, and is used to control the opening or closing of the liquid guide tube and the air guide tube.

10. A large-diameter double-layer sealing surface double-stage intelligent adjustment sealing system, using a large-diameter double-layer sealing surface double-stage intelligent adjustment sealing device according to any one of claims 1 to 9, characterized in that: It includes a signal identifier, a processor, a drive controller and a time-sharing starter; The signal identifier is used to obtain the water flow sediment content signal, the turbine start and stop signal and the upstream and downstream water level difference signal through the monitoring component; The processor is used to analyze the water flow sediment content signal, the turbine start and stop signal and the upstream and downstream water level difference signal to generate a pressure adjustment signal for the inflatable member; The drive controller is used to control the time-sharing starter to regulate the pressure in the inflatable member based on the pressure regulation signal.

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