阅读说明：本技术 一种水轮机主轴密封件监测系统 (Monitoring system for main shaft sealing element of water turbine ) 是由 杨俊� 李建清 靳帅 陈千千 于 2020-07-10 设计创作，主要内容包括：本发明涉及监测装置领域,公开了一种水轮机主轴密封件监测系统,包括用于对水轮机主轴进行密封的密封件,还包括用于监测密封件磨损情况的机械监测机构和电子监测机构。其能同时兼顾实地机械监测以及远程电子监测,两者协同配合,既能实时在线监测,又能避免电子监测可能产生的多种问题,全方位避免水轮机主轴密封件过度磨损,及时提醒操作人员进行维护或更换。(The invention relates to the field of monitoring devices, and discloses a water turbine main shaft sealing element monitoring system which comprises a sealing element for sealing a water turbine main shaft, a mechanical monitoring mechanism for monitoring the abrasion condition of the sealing element and an electronic monitoring mechanism. It can compromise mechanical monitoring and long-range electronic monitoring on the spot simultaneously, and both cooperate, can real-time on-line monitoring, can avoid the multiple problem that electronic monitoring probably produced again, and the excessive wearing and tearing of hydraulic turbine main shaft seal spare are avoided to the all-round, in time reminds operating personnel to maintain or change.)

1. A hydraulic turbine main shaft sealing element monitoring system comprises a sealing element (10) used for sealing a hydraulic turbine main shaft, and is characterized by further comprising a mechanical monitoring mechanism and an electronic monitoring mechanism used for monitoring the abrasion condition of the sealing element (10).

2. The hydraulic turbine main shaft seal monitoring system according to claim 1, wherein the mechanical monitoring mechanism comprises an anti-wear ring (20) sleeved with a side wall of a main shaft of the hydraulic turbine and a floating barrel (21) sleeved on the main shaft of the hydraulic turbine, the floating barrel (21) rotates and is in sliding fit with the main shaft of the hydraulic turbine, the floating barrel (21) is connected with an external environment, the floating barrel (21) and the anti-wear ring (20) are sealed through a sealing member (10),

the mechanical monitoring mechanism further comprises an indicating assembly (22) for indicating the axial moving distance of the floating barrel (21) along the main shaft of the water turbine.

3. The hydraulic turbine main shaft seal monitoring system of claim 2, wherein the floating barrel (21) can slide down along the main shaft of the hydraulic turbine under the action of self gravity, the indicating assembly (22) comprises a plurality of indicating pieces (221) and a plurality of reference pieces (222), the indicating pieces (221) correspond to the reference pieces (222) one by one, the reference pieces (222) are all connected with an external environment, the reference pieces (222) are all provided with scale marks (2221) along the axial direction of the floating barrel (21), the indicating pieces (221) are arranged on the floating barrel (21) and are matched with the scale marks (2221) of the corresponding reference pieces (222) only along the axial direction of the floating barrel (21).

4. The hydraulic turbine main shaft seal monitoring system as claimed in claim 3, wherein the outer side wall of the floating barrel (21) is sleeved with a sealing cover (23), the outer side wall of the sealing cover (23) is connected with an external environment and sealed, the inner side wall of the sealing cover (23) is matched with the outer side wall of the floating barrel (21), and the reference pieces (222) are arranged on one side, away from the antiwear ring (20), of the sealing cover (23).

5. The turbine main shaft seal monitoring system according to claim 4, wherein the floating barrel (21) is radially divided into a plurality of cylindrical surface portions (211) having the same central angle, and an indicator (221) is provided at the same position of each of the plurality of cylindrical surface portions,

the reference pieces (222) are uniformly arranged on the sealing cover (23) and are respectively connected with the corresponding indicating pieces (221) in a sliding mode along the axial direction of the floating cylinder (21).

6. The hydraulic turbine main shaft seal monitoring system as claimed in claim 5, wherein the reference member (222) is cylindrical, the reference member (222) is axially arranged along the floating cylinder (21), one end of the reference member is connected with one side of the sealing cover (23) far away from the antiwear ring, and the indicator (221) is provided with a guide hole (2211) in sliding fit with the reference member (222).

7. The hydraulic turbine main shaft seal monitoring system as claimed in claim 4, wherein a ring groove (212) is formed at the contact position of the outer side wall of the floating barrel (21) and the sealing cover (23), a sealing strip (213) is arranged in the ring groove (212), and the sealing strip (213) is tightly pressed and sealed with the inner side wall of the sealing cover (23).

8. The water turbine main shaft seal monitoring system according to claim 2, characterized in that a water spraying groove (11) is formed in the bottom of the seal (10), a water channel (24) is arranged in the floating barrel (21), one end of the water channel (24) is communicated with an external water source through a water pump, and the other end of the water channel is communicated with the water spraying groove (11).

9. The hydraulic turbine main shaft seal monitoring system of claim 2, characterized in that the electronic monitoring mechanism comprises a plurality of displacement sensors (30), the plurality of displacement sensors (30) are all connected with the floating barrel (21) and axially arranged along the floating barrel (21), the monitoring ends of the plurality of displacement sensors (30) all point to the antiwear ring (20), the plurality of displacement sensors (30) are jointly connected with a PLC (40), the PLC (40) is connected with a display (41), and the PLC (40) is connected with an upper computer (43) through an LCU (42) in the spot.

10. The turbine main shaft seal monitoring system of claim 9 wherein the displacement sensors (30) are 4 in number and arranged in a cross.

Technical Field

The invention relates to the field of monitoring devices, in particular to a monitoring system for a main shaft sealing element of a water turbine.

Background

And (3) according to the requirements of the maintenance technical specification DL/T817-2014 of the vertical hydraulic generator, periodically checking and measuring the sealing condition of the main shaft of the hydraulic generator set. At present, in the actual operation process of a power station, the maintenance period is generally every time every year, and manual measurement, statistics and analysis of a spindle seal cover opening are mostly carried out by a mechanical staff maintenance worker. However, the method has the disadvantages that on one hand, due to the fact that different personnel measure, large deviation exists in the measured position and the reading of the measuring result, actual conditions cannot be reflected fairly and objectively, and due to the fact that the working space is narrow, certain risks and hidden dangers exist; on the other hand, manual measurement can affect the sealing performance of the whole equipment in the processes of disassembly and assembly, and the safety of the equipment operation is seriously affected in the past. In order to avoid the influence that mechanical disassembly and installation caused, at present, some prior art adopts the sensor to monitor, but the sensor generally sets up on equipment mechanical structure, when the sealing member takes place wearing and tearing, the cooperation relation changes between the part, when the position between the equipment mechanical structure slightly changes, will reduce the monitoring precision of sensor by a wide margin, lead to the sensor can't form good cooperation with mechanical structure, and the sensor generally is applied to remote monitoring, can't in time communicate with the operation workman on the spot, delay the operating personnel on the spot and carry out the processing of very first time to equipment, can't avoid also appearing signal error in the monitoring process, the wrong report, the scheduling problem of broken string.

The present application is made in view of this feature.

Content of application

The invention aims to provide a water turbine main shaft sealing element monitoring system which can simultaneously give consideration to on-site mechanical monitoring and remote electronic monitoring, can realize real-time online monitoring and avoid various problems possibly caused by electronic monitoring by cooperating with each other, comprehensively avoids excessive abrasion of a water turbine main shaft sealing element, and timely reminds an operator to maintain or replace the water turbine main shaft sealing element.

The embodiment of the application is realized by the following technical scheme:

a hydraulic turbine main shaft sealing element monitoring system comprises a sealing element used for sealing a hydraulic turbine main shaft, and further comprises a mechanical monitoring mechanism and an electronic monitoring mechanism used for monitoring the abrasion condition of the sealing element.

Further, mechanical monitoring mechanism includes the ring of wearing and the suit of wearing that cup joints with hydraulic turbine main shaft lateral wall and the epaxial floating barrel of hydraulic turbine, floating barrel and hydraulic turbine main shaft rotate and sliding fit, and floating barrel is connected with external environment, and it is sealed through the sealing member between floating barrel and the ring of wearing, mechanical monitoring mechanism still includes the instruction subassembly that is used for instructing floating barrel along hydraulic turbine main shaft axial displacement distance.

Further, a section of thick bamboo can slide down along the hydraulic turbine main shaft under self action of gravity, indicate the subassembly to include a plurality of indicators and a plurality of reference, a plurality of indicators and a plurality of reference one-to-one, a plurality of reference all are connected with external environment, and a plurality of reference all are equipped with the scale mark along the section of thick bamboo axial that floats, and are a plurality of the indicator is located on the section of thick bamboo that floats to only follow the cooperation of the section of thick bamboo axial that floats with the scale mark of the reference of correspondence.

Further, the cover of floating barrel outer wall cover is equipped with sealed lid, and sealed lid lateral wall is connected and sealed with external environment, and sealed lid inside wall and floating barrel outer wall phase-match are a plurality of one side that wear ring was kept away from to sealed lid is all located to the reference.

Furthermore, the floating cylinder is radially divided into a plurality of cylindrical surface parts with the same central angle, the same positions of the cylindrical surface parts are respectively provided with an indicating piece, and the reference pieces are uniformly arranged on the sealing cover and are respectively connected with the corresponding indicating pieces in a sliding mode along the axial direction of the floating cylinder.

Furthermore, the reference piece is columnar, the reference piece is arranged along the axial direction of the floating cylinder, one end of the reference piece is connected with one side, far away from the anti-wear ring, of the sealing cover, and the indicating piece is provided with a guide hole in sliding fit with the reference piece.

Furthermore, an annular groove is formed in the contact position of the outer side wall of the floating cylinder and the sealing cover, a sealing strip is arranged in the annular groove, and the sealing strip and the inner side wall of the sealing cover are tightly extruded and sealed.

Furthermore, a water spraying groove is formed in the bottom of the sealing element, a water channel is arranged in the floating cylinder, one end of the water channel is communicated with an external water source through a water pump, and the other end of the water channel is communicated with the water spraying groove.

Further, electronic monitoring mechanism includes a plurality of displacement sensor, and a plurality of displacement sensor all are connected with the section of thick bamboo that floats to along the axial setting of section of thick bamboo that floats, the equal directional ring that wear-resistants of a plurality of displacement sensor's monitoring end, a plurality of displacement sensor link jointly has a PLC controller, and the PLC controller links there is the display, and the PLC controller links there is the host computer through local LCU.

Further, the displacement sensors are 4 in number and arranged in a cross shape.

The monitoring system for the main shaft sealing element of the water turbine provided by the invention has the beneficial effects that:

(1) the main shaft of the water turbine is sealed by arranging the sealing element, so that the water body containing silt is prevented from entering the water turbine to cause the conditions of water leakage, mechanical blockage and the like, and the abrasion condition of the sealing element is visually monitored by mechanical cooperation by arranging the mechanical monitoring mechanism, so that field operators can visually monitor and know the abrasion condition of the sealing element at the first time, and further take countermeasures; through setting up electronic monitoring mechanism, long-range and real-time wearing and tearing condition to the sealing member is monitored, avoids taking place the condition that field operation personnel did not in time realize the wearing and tearing situation, and field personnel can reconfirm through mechanical monitoring mechanism according to the condition of remote monitoring personnel feedback, and both cooperate, and the all-round excessive wearing and tearing of hydraulic turbine main shaft seal spare of avoiding.

(2) Through setting up the ring of wearing resistant, make it rotate along with the turbine main shaft is synchronous, through setting up floating barrel, make it compress tightly the sealing member with ring of wearing resistant from both sides, thereby realize the sealed of the hydraulic turbine main shaft of rotation work, through setting up the sealing member, avoid floating barrel and wear resistant rigid contact and friction between the ring when realizing main shaft seal, at the in-process that the sealing member lasts wearing and tearing, floating barrel will be close to the ring of wearing resistant gradually under the action of gravity, indicate the subassembly through setting up, the distance that the ring of wearing resistant is close to floating barrel monitors, thereby the wearing and tearing condition of ring of wearing resistant is monitored through this monitoring value is indirect.

(3) Through the matching of the indicating piece and the reference piece, when the sealing piece is worn and the floating cylinder moves downwards under the action of gravity, the indicating piece moves downwards along with the floating cylinder, so that the position of the indicated scale mark is changed, and the downward movement distance of the floating cylinder, namely the abrasion loss of the sealing piece, is determined through the scale mark.

(4) Through setting up sealed lid, when sealed with hydraulic turbine main shaft end, reserved the space for a section of thick bamboo that floats along the axial motion of main shaft to, the inner ring of sealed lid can carry out radial spacing to the lateral wall of a section of thick bamboo that floats, prevents that a section of thick bamboo that floats from taking place radial rocking and skew, thereby influences sealed effect.

(5) Through all locating a plurality of reference parts one side that sealed lid kept away from ring of wearing to wear, make a plurality of reference parts expose outside sealing mechanism, the user need not to dismantle sealed relevant mechanism can carry out visual monitoring to the sealing member wearing and tearing condition to the installation deviation and the hidden danger of leaking that produce when avoiding dismantling and installing.

(6) Include a plurality of face portions through setting up a flotation tank to make can relatively independent and even extrusion sealing member between a plurality of face portions, in the main shaft operation process, the indicator that corresponds on each face portion will react the wearing and tearing condition of sealing member in different position with referring to the piece, thereby make on-the-spot practicality personnel can audio-visually judge the wearing and tearing condition of the sealing member in this position according to the indicator of different positions, in order to make timely and reasonable processing.

(7) Through setting up indicator and the reference sliding connection that corresponds, when making things convenient for monitoring data, it is further spacing to float a section of thick bamboo, makes the unable rotation of a section of thick bamboo that floats, prevents that a section of thick bamboo that floats from following the main shaft and rotating together to can't carry out the reading according to the indicator.

(8) Through setting up water spout and water course, introduce clean water source, discharge with certain pressure from the water spout to form the water film of outside flow between sealing member and ring of wearing resistant, on the one hand break away the impurity of infiltration, stabilize the wear resistance of sealing member, on the other hand forms the water film at the friction surface, can effectively reduce wearing and tearing, promote the life of sealing member.

(9) Through setting up displacement sensor, and be fixed in on the floating barrel with it to measure its monitoring end and the distance between the ring that wear-resistants, when the floating barrel moves down, distance between position sensor and the ring that wear-resistants shortens gradually, thereby the wearing and tearing volume of direct reaction sealing member. Through setting up a plurality of displacement sensor, monitor the wearing and tearing volume in the different position of sealing member, through setting up PLC controller, local LCU and host computer, store and the analysis the real-time data that a plurality of displacement sensor gathered, in time master the trend of wearing and tearing to provide the decision-making support for the long-term safe operation of unit.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

FIG. 1 is a schematic cross-sectional view of a turbine main shaft seal monitoring system according to an embodiment of the present invention at an indicating assembly;

fig. 2 is a schematic cross-sectional view of a displacement sensor of a hydraulic turbine main shaft seal monitoring system according to an embodiment of the present invention;

FIG. 3 is a schematic top view of a floating ring of a turbine main shaft seal monitoring system provided in accordance with an embodiment of the present invention;

fig. 4 is a schematic view of an electronic monitoring mechanism of a hydraulic turbine main shaft seal monitoring system according to an embodiment of the present invention.

Icon: 10-a seal; 11-a water spray groove; 20-an antiwear ring; 21-a floating cylinder; 211-cylinder part; 212-ring groove; 213-a sealing strip; 22-an indication component; 221-an indicator; 2211-guide holes; 222-a reference; 2221-graduation mark; 23-a sealing cover; 24-water channels; 30-a displacement sensor; 40-a PLC controller; 41-a display; 42-an in-situ LCU; 43-an upper computer.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present application, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are used for indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship which is usually placed when the product of the application is used, the description is only for convenience and simplicity, and the indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation and be operated, and thus, should not be construed as limiting the present application.

In the description of the present application, it should also be noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.