CN204064276U - A kind of contactless main control valve displacement measuring device - Google Patents
A kind of contactless main control valve displacement measuring device Download PDFInfo
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- 238000006073 displacement reaction Methods 0.000 title claims abstract description 116
- 238000001514 detection method Methods 0.000 abstract description 24
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- 238000005259 measurement Methods 0.000 description 13
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- 230000009286 beneficial effect Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
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Abstract
本实用新型公开了一种非接触式主配压阀位移测量装置，包括位移检测杆、非接触式位移传感器和固定支架，所述位移检测杆的一端与主配压阀的阀芯连接，另一端为锥形圆柱体结构，所述非接触式位移传感器安装在固定支架上，所述非接触式位移传感器正对位移检测杆的锥形圆柱侧面。本实用新型的位移检测杆与主配压阀的阀芯连接，主配压阀的阀芯带动位移检测杆移动，通过非接触式位移传感器对位移检测杆移动进行位移监测，从而实现对阀芯位移监测的目的；通过非接触的位移监测，避免了主配压阀大幅动作造成振动对传感器本体带来的影响，减小了反馈信号的波动及误差，减少有震动而造成的调速系统震荡或失控。
The utility model discloses a non-contact displacement measuring device for a main pressure distribution valve, which comprises a displacement detection rod, a non-contact displacement sensor and a fixed bracket, one end of the displacement detection rod is connected with the valve core of the main pressure distribution valve, and the other is One end is a tapered cylinder structure, the non-contact displacement sensor is installed on a fixed bracket, and the non-contact displacement sensor is facing the tapered cylinder side of the displacement detection rod. The displacement detection rod of the utility model is connected with the spool of the main pressure distribution valve, the spool of the main pressure distribution valve drives the displacement detection rod to move, and the non-contact displacement sensor monitors the displacement of the displacement detection rod, thereby realizing the control of the valve core. The purpose of displacement monitoring: through non-contact displacement monitoring, the impact of vibration on the sensor body caused by the large-scale movement of the main pressure distribution valve is avoided, the fluctuation and error of the feedback signal are reduced, and the vibration of the speed control system caused by vibration is reduced. or out of control.
Description
技术领域 technical field
本实用新型涉及位移测量装置，具体涉及一种非接触式主配压阀位移测量装置。 The utility model relates to a displacement measuring device, in particular to a non-contact displacement measuring device for a main pressure distribution valve.
背景技术 Background technique
主配压阀是水轮机调速器机械液压系统的功率级液压放大器，它将电液转换器的机械位移或液压控制信号放大成相应方向的、与其成比例的、满足接力器流量要求的液压信号，控制接力器的开启或关闭。主配压阀推动接力器进而推动水轮机进水口导叶，以实现对水轮机进水流量的控制，从而达到控制水轮机转速的目的。在主配压阀的控制过程中，需将主配压阀位移信号（即主配压阀核心元件阀芯的轴向位移信号）引入水轮机调速器电气系统中，以形成闭环控制。目前行业内普遍采用差动变压器式直流位移传感器，其分为铁芯可分离式、导向式、回弹式，出于成本原因，一般都使用回弹式。使用时，主体部分固定不动，铁芯部分机械地固定在与阀芯1:1动作的部件上，并跟随着阀芯一起动作。故可通过差动变压器式直流位移传感器将阀芯轴向位移信号送入调速器电气系统，但是现有的检测方式存在以下问题：1）主配压阀在大幅动作时，会有较大的振动，传感器铁芯会将振动传递给传感器主体，在此阶段会有一定的信号反馈误差，对调速系统的实际控制有较大的影响；2）在主配压阀长时间运行后，传感器铁芯与主体部分会出现一定程度的磨损，并且位移传感器与主配间会出现松动状况，严重时会导致调速系统失控；3）安装时，对主体与铁芯的同心度要求较高，在主配压阀设计及安装存在一定困难。 The main pressure distribution valve is the power level hydraulic amplifier of the mechanical hydraulic system of the turbine governor, which amplifies the mechanical displacement or hydraulic control signal of the electro-hydraulic converter into a hydraulic signal in the corresponding direction, proportional to it, and meets the flow requirements of the servomotor , to control the opening or closing of the servomotor. The main pressure distribution valve pushes the servomotor and then pushes the guide vane of the water inlet of the water turbine to realize the control of the water flow into the water turbine, so as to achieve the purpose of controlling the speed of the water turbine. In the control process of the main pressure distribution valve, the displacement signal of the main pressure distribution valve (that is, the axial displacement signal of the core component of the main pressure distribution valve) needs to be introduced into the electrical system of the turbine governor to form a closed-loop control. At present, the differential transformer type DC displacement sensor is generally used in the industry, which can be divided into core detachable type, guide type, and springback type. For cost reasons, springback type is generally used. When in use, the main part is fixed, and the iron core part is mechanically fixed on the part that moves 1:1 with the valve core, and moves together with the valve core. Therefore, the axial displacement signal of the spool can be sent to the electrical system of the governor through the differential transformer type DC displacement sensor, but the existing detection method has the following problems: 1) When the main pressure distribution valve moves in a large range, there will be a large vibration, the sensor core will transmit the vibration to the sensor body, and there will be a certain signal feedback error at this stage, which will have a greater impact on the actual control of the speed control system; 2) After the main pressure distribution valve has been running for a long time, There will be a certain degree of wear and tear between the sensor core and the main body, and there will be looseness between the displacement sensor and the main part, which will cause the speed control system to lose control in severe cases; 3) When installing, the concentricity between the main body and the iron core is required to be high , There are certain difficulties in the design and installation of the main pressure distribution valve.
实用新型内容 Utility model content
为了解决上述技术问题，本实用新型提供了一种非接触式主配压阀位移测量装置。 In order to solve the above technical problems, the utility model provides a non-contact displacement measuring device for the main pressure distribution valve.
为了达到上述目的，本实用新型所采用的技术方案是： In order to achieve the above object, the technical solution adopted in the utility model is:
一种非接触式主配压阀位移测量装置，包括位移检测杆、非接触式位移传感器和固定支架，所述位移检测杆的一端与主配压阀的阀芯连接，另一端为锥形圆柱体结构，所述非接触式位移传感器安装在固定支架上，所述非接触式位移传感器正对位移检测杆的锥形圆柱侧面。 A non-contact main pressure distribution valve displacement measurement device, including a displacement detection rod, a non-contact displacement sensor and a fixed bracket, one end of the displacement detection rod is connected to the spool of the main pressure distribution valve, and the other end is a tapered cylinder The non-contact displacement sensor is installed on a fixed support, and the non-contact displacement sensor is facing the tapered cylinder side of the displacement detection rod.
所述固定支架包括立柱、连杆以及用以安装非接触式位移传感器的安装板，所述立柱上套有固定环，所述安装板的一端与立柱铰接，所述连杆的一端与固定环铰接，另一端与安装板的板身铰接。 The fixed bracket includes a column, a connecting rod and a mounting plate for installing the non-contact displacement sensor. Hinged, the other end is hinged with the body of the mounting plate.
所述非接触式位移传感器的侧边上设置有螺纹结构。 A thread structure is provided on the side of the non-contact displacement sensor.
所述安装板上开有与非接触式位移传感器匹配的通孔，所述非接触式位移传感器嵌入通孔内，并且非接触式位移传感器的两端分别位于安装板的两侧，所述非接触式位移传感器的两端均通过螺母锁紧。 A through hole matching the non-contact displacement sensor is opened on the mounting plate, the non-contact displacement sensor is embedded in the through hole, and the two ends of the non-contact displacement sensor are respectively located on both sides of the mounting plate, the non-contact displacement sensor Both ends of the contact displacement sensor are locked by nuts.
所述通孔为与安装板上、下侧面垂直的通孔，所述非接触式位移传感器垂直嵌入通孔内。 The through hole is a through hole perpendicular to the mounting plate and the lower side, and the non-contact displacement sensor is vertically embedded in the through hole.
所述固定环位于安装板与立柱的铰接点的上方。 The fixing ring is located above the hinge point between the mounting plate and the column.
本实用新型所达到的有益效果：1、本实用新型的位移检测杆与主配压阀的阀芯连接，主配压阀的阀芯带动位移检测杆移动，通过非接触式位移传感器对位移检测杆移动进行位移监测，从而实现对阀芯位移监测的目的；通过非接触的位移监测，避免了主配压阀大幅动作造成振动对传感器本体带来的影响，减小了反馈信号的波动及误差，减少有震动而造成的调速系统震荡或失控；2、本实用新型通过非接触的位移监测，避免了长时间运行过程中传感器铁芯与本体之间的机械磨损，避免了由于接触摩擦所带来的运动卡涩或震动的不连续，减小了随着时间推移带来的测量精度变化，由于避免了机械接触，使由摩擦力传导带来的机械松脱的机会降到最低，保证调速系统稳定运行；3、本实用新型由于采用非接触的位移监测，改变了传感器本体与主配压阀阀芯之间的位置关系，避免了两者之间的同轴度要求，降低了主配压阀设计的难度，使主配压阀的安装与调试更加容易；4、常规的主配压阀位移检测装置中传感器量程必须大于主配压阀的位移，这使得许多小量程、高精度、线性度高、价格又便宜的位移传感器不能适用，而本实用新型的装置中，通过改变α的角度，可以使传感器型号规格的选择更加广泛，有利于提高测量精度，降低设备成本。 The beneficial effects achieved by the utility model: 1. The displacement detection rod of the present invention is connected with the spool of the main pressure distribution valve, and the spool of the main pressure distribution valve drives the displacement detection rod to move, and the displacement is detected by the non-contact displacement sensor. The rod moves for displacement monitoring, so as to realize the purpose of valve core displacement monitoring; through non-contact displacement monitoring, the influence of vibration on the sensor body caused by the large-scale movement of the main pressure distribution valve is avoided, and the fluctuation and error of the feedback signal are reduced. , to reduce the shock or out of control of the speed control system caused by vibration; 2. The utility model avoids the mechanical wear between the sensor core and the body during the long-term operation through non-contact displacement monitoring, and avoids the mechanical wear caused by contact friction. The movement jamming or discontinuity of vibration reduces the change of measurement accuracy over time, and because mechanical contact is avoided, the chance of mechanical loosening caused by friction force transmission is minimized, ensuring The speed regulating system runs stably; 3. Because the utility model adopts non-contact displacement monitoring, the positional relationship between the sensor body and the main pressure distribution valve spool is changed, the coaxiality requirement between the two is avoided, and the The difficulty in the design of the main pressure distribution valve makes the installation and debugging of the main pressure distribution valve easier; 4. The sensor range in the conventional main pressure distribution valve displacement detection device must be greater than the displacement of the main pressure distribution valve, which makes many Displacement sensors with high precision, high linearity, and low price are not applicable, but in the device of the present invention, by changing the angle of α, the selection of sensor models and specifications can be made wider, which is beneficial to improving measurement accuracy and reducing equipment costs.
附图说明 Description of drawings
图1为本实用新型的结构示意图。 Fig. 1 is the structural representation of the utility model.
具体实施方式 Detailed ways
下面结合附图对本实用新型作进一步描述。以下实施例仅用于更加清楚地说明本实用新型的技术方案，而不能以此来限制本实用新型的保护范围。 Below in conjunction with accompanying drawing, the utility model is further described. The following examples are only used to illustrate the technical solution of the utility model more clearly, but not to limit the protection scope of the utility model.
如图1所示，一种非接触式主配压阀位移测量装置，包括位移检测杆2、非接触式位移传感器8和固定支架，位移检测杆2的一端与主配压阀1的阀芯连接，另一端为锥形圆柱体结构，非接触式位移传感器8安装在固定支架上，非接触式位移传感器8正对位移检测杆2的锥形圆柱侧面。 As shown in Figure 1, a non-contact main pressure distribution valve displacement measurement device includes a displacement detection rod 2, a non-contact displacement sensor 8 and a fixed bracket, one end of the displacement detection rod 2 is connected to the spool of the main pressure distribution valve 1 The other end is a tapered cylinder structure, the non-contact displacement sensor 8 is installed on the fixed bracket, and the non-contact displacement sensor 8 is facing the tapered cylinder side of the displacement detection rod 2.
上述非接触式主配压阀位移测量装置的固定支架主要起固定非接触式位移传感器8的作用，最后只要保证非接触式位移传感器8正对位移检测杆2的锥形圆柱侧面即可，所以此固定支架可以是不可调节式的固定机械结构，也可是可调解式的机械结构。在这里为了适用更加广泛采用的是可调解式的机械结构，具体结构如下： The fixed bracket of the above-mentioned non-contact main pressure distribution valve displacement measurement device mainly plays the role of fixing the non-contact displacement sensor 8. Finally, it is only necessary to ensure that the non-contact displacement sensor 8 is facing the tapered cylinder side of the displacement detection rod 2, so The fixing bracket can be a non-adjustable fixed mechanical structure, or an adjustable mechanical structure. Here, in order to apply more widely, the adjustable mechanical structure is adopted, and the specific structure is as follows:
固定支架包括立柱3、连杆5以及用以安装非接触式位移传感器8的安装板6，安装板6的一端与立柱3铰接，立柱3上套有固定环4，固定环4位于安装板6与立柱3的铰接点的上方，连杆5的一端与固定环4铰接，另一端与安装板6的板身铰接。此种结构只需调节固定环4的位置即可调节α的角度（α在图中已经标出，是安装板6水平面的角度），以确保非接触式位移传感器8正对位移检测杆2的锥形圆柱侧面。 The fixed bracket includes a column 3, a connecting rod 5, and a mounting plate 6 for installing a non-contact displacement sensor 8. One end of the mounting plate 6 is hinged to the column 3. The column 3 is covered with a fixed ring 4, and the fixed ring 4 is located on the mounting plate 6. Above the hinge point with the column 3, one end of the connecting rod 5 is hinged with the fixed ring 4, and the other end is hinged with the body of the mounting plate 6. This structure only needs to adjust the position of the fixed ring 4 to adjust the angle of α (α has been marked in the figure, which is the angle of the horizontal plane of the mounting plate 6), so as to ensure that the non-contact displacement sensor 8 is facing the position of the displacement detection rod 2 Tapered cylindrical sides.
为了更好的锁紧非接触式位移传感器8，非接触式位移传感器8的侧边上设置有螺纹结构，安装板6上开有与非接触式位移传感器8匹配的通孔，该通为与安装板6上、下侧面垂直的通孔，非接触式位移传感器8嵌入通孔内，更具体的说是垂直嵌入，非接触式位移传感器8的两端分别位于安装板6的两侧，非接触式位移传感器8的两端均通过螺母7锁紧。此种结构可通过调节螺母7，调整非接触式位移传感器8与位移检测杆2的锥形圆柱侧面的相对距离，以保证位移检测杆2运动时始终在非接触式位移传感器8的测量范围内，且不损坏非接触式位移传感器8。 In order to better lock the non-contact displacement sensor 8, the side of the non-contact displacement sensor 8 is provided with a threaded structure, and the mounting plate 6 is provided with a through hole matched with the non-contact displacement sensor 8, which is connected with the non-contact displacement sensor 8. The vertical through holes on the upper and lower sides of the mounting plate 6, the non-contact displacement sensor 8 is embedded in the through hole, more specifically embedded vertically, and the two ends of the non-contact displacement sensor 8 are respectively located on both sides of the mounting plate 6. Both ends of the contact displacement sensor 8 are locked by nuts 7 . This structure can adjust the relative distance between the non-contact displacement sensor 8 and the tapered cylinder side of the displacement detection rod 2 by adjusting the nut 7, so as to ensure that the displacement detection rod 2 is always within the measurement range of the non-contact displacement sensor 8 when it moves. , and does not damage the non-contact displacement sensor 8.
上述的非接触式主配压阀位移测量装置在使用时，先将非接触式位移传感器8安装在安装板6上，调节非接触式位移传感器8与位移检测杆2的锥形圆柱侧面的距离，主配压阀1的阀芯移动，带动位移检测杆2移动，在移动时，位移检测杆2的锥形圆柱侧面与非接触式位移传感器8之间的间距会成恒定比例改变，非接触式位移传感器8将间距信号输出给调速系统电气部分，通过此方法可将阀芯的轴向位移信号转化为非接触式位移传感器8与位移检测杆2间的位移信号，并反馈给调速系统电气控制部分，以实现非接触式主配压阀1位移测量。 When the above-mentioned non-contact main pressure distribution valve displacement measurement device is in use, first install the non-contact displacement sensor 8 on the mounting plate 6, and adjust the distance between the non-contact displacement sensor 8 and the side of the tapered cylinder of the displacement detection rod 2 , the spool of the main pressure distribution valve 1 moves, driving the displacement detection rod 2 to move. When moving, the distance between the tapered cylindrical side of the displacement detection rod 2 and the non-contact displacement sensor 8 will change in a constant ratio. The displacement sensor 8 outputs the distance signal to the electrical part of the speed control system. Through this method, the axial displacement signal of the spool can be converted into a displacement signal between the non-contact displacement sensor 8 and the displacement detection rod 2, and fed back to the speed control system. The electrical control part of the system is used to realize non-contact displacement measurement of the main pressure distribution valve 1.
上述的非接触式主配压阀位移测量装置，通过非接触的位移监测，避免了主配压阀1大幅动作造成振动对传感器本体带来的影响，减小了反馈信号的波动及误差，减少有震动而造成的调速系统震荡或失控；上述的非接触式主配压阀位移测量装置，通过非接触的位移监测，避免了长时间运行过程中传感器铁芯与本体之间的机械磨损，避免了由于接触摩擦所带来的运动卡涩或震动的不连续，减小了随着时间推移带来的测量精度变化，使由摩擦力传导带来的机械松脱的机会降到最低，保证调速系统稳定运行；上述的非接触式主配压阀位移测量装置，改变了传感器本体与主配压阀1阀芯之间的位置关系，避免了两者之间的同轴度要求，降低了主配压阀1设计的难度，使主配压阀1的安装与调试更加容易；上述的非接触式主配压阀位移测量装置，通过改变α的角度，可以使传感器型号规格的选择更加广泛，有利于提高测量精度，降低设备成本。 The above-mentioned non-contact main pressure distribution valve displacement measurement device, through non-contact displacement monitoring, avoids the influence of vibration on the sensor body caused by the large-scale movement of the main pressure distribution valve 1, reduces the fluctuation and error of the feedback signal, and reduces Oscillation or loss of control of the speed control system caused by vibration; the above-mentioned non-contact main pressure distribution valve displacement measurement device avoids mechanical wear between the sensor core and the body during long-term operation through non-contact displacement monitoring. It avoids the motion jamming or vibration discontinuity caused by contact friction, reduces the change of measurement accuracy over time, and minimizes the chance of mechanical loosening caused by friction force transmission, ensuring The speed control system runs stably; the above-mentioned non-contact main pressure distribution valve displacement measurement device changes the positional relationship between the sensor body and the main pressure distribution valve 1 spool, avoids the coaxiality requirement between the two, and reduces the It eliminates the difficulty of designing the main pressure distribution valve 1 and makes the installation and debugging of the main pressure distribution valve 1 easier; the above-mentioned non-contact main pressure distribution valve displacement measuring device can make the selection of the sensor model and specification easier by changing the angle of α. Wide range, which is beneficial to improve measurement accuracy and reduce equipment cost.
以上所述仅是本实用新型的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本实用新型技术原理的前提下，还可以做出若干改进和变形，这些改进和变形也应视为本实用新型的保护范围。 The above is only the preferred embodiment of the utility model, it should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the utility model, some improvements and deformations can also be made. And deformation should also be regarded as the protection scope of the present utility model.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106226046A (en) * | 2016-07-12 | 2016-12-14 | 中国矿业大学 | A kind of poppet spool valve vibration test system and method |
| CN106768922A (en) * | 2016-11-29 | 2017-05-31 | 广东蓄能发电有限公司 | A kind of wicket gate control loop stroke detection with distributing valve and adjustment method |
| CN108413911A (en) * | 2018-02-26 | 2018-08-17 | 中国长江电力股份有限公司 | A kind of main dispensing spool displacement measurement method of contactless governor and device |
| CN108413910A (en) * | 2018-02-26 | 2018-08-17 | 中国长江电力股份有限公司 | A kind of main dispensing spool displacement measurement method of governor and device of the anti-drift of electromagnetism interference |
| CN110657768A (en) * | 2019-10-28 | 2020-01-07 | 西安交通大学 | Method for measuring axial and radial displacements of rotor by utilizing conical surface |
| CN112459957A (en) * | 2020-12-08 | 2021-03-09 | 中国长江电力股份有限公司 | Device and method for monitoring state of main distributing valve of speed regulator of water turbine |
| CN113899314A (en) * | 2021-09-09 | 2022-01-07 | 燕山大学 | Device and method for real-time measurement of non-contact valve core displacement based on spectral confocal |
| CN115148222A (en) * | 2022-08-31 | 2022-10-04 | 安徽声讯信息技术有限公司 | Industrial fluid detection method and system |
-
2014
- 2014-09-05 CN CN201420508629.2U patent/CN204064276U/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106226046A (en) * | 2016-07-12 | 2016-12-14 | 中国矿业大学 | A kind of poppet spool valve vibration test system and method |
| CN106768922A (en) * | 2016-11-29 | 2017-05-31 | 广东蓄能发电有限公司 | A kind of wicket gate control loop stroke detection with distributing valve and adjustment method |
| CN108413911A (en) * | 2018-02-26 | 2018-08-17 | 中国长江电力股份有限公司 | A kind of main dispensing spool displacement measurement method of contactless governor and device |
| CN108413910A (en) * | 2018-02-26 | 2018-08-17 | 中国长江电力股份有限公司 | A kind of main dispensing spool displacement measurement method of governor and device of the anti-drift of electromagnetism interference |
| CN110657768A (en) * | 2019-10-28 | 2020-01-07 | 西安交通大学 | Method for measuring axial and radial displacements of rotor by utilizing conical surface |
| CN110657768B (en) * | 2019-10-28 | 2020-11-17 | 西安交通大学 | Method for measuring axial and radial displacements of rotor by utilizing conical surface |
| CN112459957A (en) * | 2020-12-08 | 2021-03-09 | 中国长江电力股份有限公司 | Device and method for monitoring state of main distributing valve of speed regulator of water turbine |
| CN113899314A (en) * | 2021-09-09 | 2022-01-07 | 燕山大学 | Device and method for real-time measurement of non-contact valve core displacement based on spectral confocal |
| CN115148222A (en) * | 2022-08-31 | 2022-10-04 | 安徽声讯信息技术有限公司 | Industrial fluid detection method and system |
| CN115148222B (en) * | 2022-08-31 | 2023-01-03 | 安徽声讯信息技术有限公司 | Industrial fluid detection method and system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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| TR01 | Transfer of patent right |
Effective date of registration: 20171115 Address after: High road high tech Development Zone Nanjing city Jiangsu province 210032 No. 20 Co-patentee after: STATE GRID ELECTRIC POWER Research Institute Patentee after: NARI TECHNOLOGY Co.,Ltd. Address before: Nan Shui Road Gulou District of Nanjing city of Jiangsu Province, No. 8 210000 Co-patentee before: STATE GRID ELECTRIC POWER Research Institute Patentee before: NANJING NARI Group Corp. |
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Granted publication date: 20141231 |