CN216308882U - Non-contact type runner blade stroke measuring device - Google Patents
Non-contact type runner blade stroke measuring device Download PDFInfo
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- CN216308882U CN216308882U CN202121233520.9U CN202121233520U CN216308882U CN 216308882 U CN216308882 U CN 216308882U CN 202121233520 U CN202121233520 U CN 202121233520U CN 216308882 U CN216308882 U CN 216308882U
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- runner blade
- measuring device
- magnetic induction
- shaft
- protective cover
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Abstract
The utility model relates to the technical field of hydroelectric generation, in particular to a non-contact type runner blade stroke measuring device which comprises a protective cover, a runner blade stroke follow-up shaft, a magnetic induction movable ring, a magnetic induction sensor, an observation window and a pointer ring. The sensor is not in direct contact with the runner blade travel follow-up shaft, and is used for solving the problems of the conventional mechanical contact measuring device for the hydraulic power generation runner blade travel, completely avoiding the conditions of frictional heating, mechanical abrasion, card distribution, shaft breakage, measurement lag and the like in the mechanical conversion link, greatly simplifying the original structure, reducing the installation, debugging and maintenance workload, improving the measurement accuracy, realizing the real-time transmission of the runner blade travel signal and ensuring the safe and stable operation of the hydraulic power generation runner.
Description
Technical Field
The utility model relates to the technical field of hydroelectric power generation, in particular to a non-contact type runner blade stroke measuring device.
Background
The stroke of the blade of the hydraulic power generation runner is measured after a copper bearing or a ball bearing and other mechanical contact type conversion mechanisms are adopted for converting a blade stroke follow-up shaft into angular motion for a long time, the structures have a plurality of mechanical conversion links, the structure is complex, the measurement dead zone is large, the accuracy is low, the hysteresis condition is caused by the signal transmission of a stroke sensor, the axial reciprocating motion is also caused when the runner blade stroke follow-up shaft rotates, mechanical abrasion of different degrees can be caused by a long mechanical contact measurement mechanism during the running time, particularly, when the throw is increased, the accident of hair distribution or even breakage can be caused, and the safe and stable running of the runner is seriously influenced. Therefore, it is important to develop a non-contact type runner blade stroke measuring device to solve the above problems.
Disclosure of Invention
The utility model aims to provide a non-contact type runner blade stroke measuring method.
The second purpose of the utility model is to provide a non-contact type device for measuring the stroke of the runner blade.
The technical problems to be solved by the utility model are as follows: the non-contact type runner blade stroke measuring device is used for solving the problems in a conventional mechanical contact measuring device, completely avoiding the conditions of frictional heat generation, mechanical abrasion, card sending, shaft breaking, measurement lag and the like in a mechanical contact conversion mechanism link, reducing the workload of installation, debugging and maintenance, realizing real-time remote transmission of runner blade stroke signals and ensuring safe and stable running of a runner.
In order to solve the technical problems, the utility model adopts the technical scheme that:
the utility model provides a non-contact type runner blade stroke measuring device which comprises a protective cover, a runner blade follow-up shaft, a magnetic induction moving ring, a magnetic induction sensor, a transparent observation window, a pointer ring and a support. The protective cover is fixed on the support, and the interior of the protective cover is filled with blade operating oil; the runner blade stroke follow-up shaft is of a through hole structure and is arranged in the protective cover; the magnetic induction rotating ring is fixed at the top end of the blade stroke follow-up shaft and rotates and axially reciprocates together with the follow-up shaft; the magnetic induction sensor is fixed on the protective cover, a magnetic induction rod of the sensor is arranged in the magnetic induction rotating ring and the inner hole of the follow-up shaft, and the actual action position of the follow-up shaft is calculated according to the position of the magnetic induction rotating ring, so that the action stroke of the runner blade is obtained; the pointer ring is arranged on a stroke follow-up shaft of the runner blade; the observation window is arranged on the protective cover, is provided with a stroke scale mark, is matched with the pointer ring for use, and is used for observing the action position of the stroke follow-up shaft of the runner blade.
Compared with the prior art, the utility model has the beneficial effects that:
(1) the device adopts a non-contact measuring method, the sensor is not in direct contact with the stroke follow-up shaft of the runner blade, the original complex mechanical structure is changed, the size is light, the mechanism is simple, various problems in the contact mechanical conversion link are completely avoided, the response is sensitive, and the measuring accuracy is high.
(2) Due to the adoption of a non-contact measuring method, the whole measuring device can be sealed by the protective cover and can bear the oil pressure equal to the operation of the blades, the oil leakage of a measuring mechanism is avoided, a sealing and oil discharging mechanism with a traditional structure is omitted, the installation, debugging and maintenance are convenient, the service life is long, the operation is reliable, the implementation is easy, the practicability is good, the overhaul period of the equipment is prolonged, the cost is saved, and the device is very suitable for being popularized and applied in a large range.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is a left side view of an embodiment of the present invention.
In the figure: 1. a protective cover; 2. a runner blade stroke follow-up shaft; 3. magnetic induction rotating rings; 4. a magnetic induction sensor; 5. magnetic induction rods 6, pointer rings; 7. a transparent observation window; 8. and (4) a support.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1, a non-contact type runner blade stroke measuring device comprises a protective cover 1 and a support 8 for fixing the protective cover; a runner blade stroke follow-up shaft 2 disposed in the protective cover 1; the magnetic induction moving ring 3 is fixed at the top end of the runner blade stroke follow-up shaft 2 and rotates and axially reciprocates together with the follow-up shaft 2; the magnetic induction sensor 4 is fixed on the protective cover 1, a magnetic induction rod 5 of the sensor 4 is arranged in the magnetic induction movable ring 3 and an inner hole of the runner blade travel follow-up shaft 2, non-contact type relative motion is generated between the magnetic induction movable ring 3 and the magnetic induction rod 5, and the motion position of the magnetic induction movable ring 3 is induced by the magnetic induction rod 5 to calculate the action travel of the follow-up shaft 2; the pointer ring 6 is used for indicating the actual position of the follow-up shaft 2; the observation window 7 is provided with stroke scale marks and is used for observing the position of the pointer ring 6; therefore, the non-contact measurement of the stroke of the runner blade is realized, the original contact type mechanical conversion link is simplified, the accuracy of the measurement signal is improved, and the real-time transmission of the measurement signal is also ensured.
The magnetic induction sensor 4 is powered by DC24V and can provide 4-20 mA or 0-5V or 0-10V remote transmission signals, and the magnetic induction rod 5 adopts a stainless steel pressure-resistant outer tube, so that the pressure of 20MPa can be borne at most, and the use requirements of different signals and different pressure occasions can be met.
The above is the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, and variations and modifications made by those skilled in the art according to the design concept of the present invention should be considered to be within the scope of the present invention.
Claims (7)
1. The utility model provides a non-contact runner blade stroke measuring device which characterized in that: the device comprises a protective cover (1), a runner blade travel follow-up shaft (2) arranged in the protective cover (1), a magnetic induction movable ring (3) arranged at the top end of the runner blade travel follow-up shaft (2), a magnetic induction sensor (4) arranged on the protective cover (1), a pointer ring (6) arranged on the runner blade travel follow-up shaft (2), a transparent observation window (7) arranged on the protective cover (1) and a support (8) used for fixing the protective cover (1).
2. A non-contact runner blade stroke measuring device according to claim 1, wherein: a magnetic induction rod (5) of the magnetic induction sensor (4) is arranged in the magnetic induction moving ring (3) and the inner hole of the runner blade travel follow-up shaft (2).
3. A non-contact runner blade stroke measuring device according to claim 1, wherein: the pointer ring (6) is used for indicating the actual position of the follow-up shaft (2).
4. A non-contact runner blade stroke measuring device according to claim 1, wherein: the observation window (7) is provided with stroke scale marks for observing the position of the pointer ring (6).
5. A non-contact runner blade stroke measuring device according to claim 1, wherein: the whole measuring device is sealed by a protective cover (1) and is filled with blade operating oil.
6. A non-contact runner blade stroke measuring device according to claim 1, wherein: the magnetic induction sensor (4) is powered by DC24V and can provide a remote transmission signal of 4-20 mA, 0-5V or 0-10V.
7. A non-contact runner blade stroke measuring device according to claim 1, wherein: the magnetic induction rod (5) adopts a stainless steel pressure-resistant outer pipe, and can bear the pressure of 20MPa to the maximum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121233520.9U CN216308882U (en) | 2021-06-03 | 2021-06-03 | Non-contact type runner blade stroke measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121233520.9U CN216308882U (en) | 2021-06-03 | 2021-06-03 | Non-contact type runner blade stroke measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216308882U true CN216308882U (en) | 2022-04-15 |
Family
ID=81081191
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121233520.9U Active CN216308882U (en) | 2021-06-03 | 2021-06-03 | Non-contact type runner blade stroke measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216308882U (en) |
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2021
- 2021-06-03 CN CN202121233520.9U patent/CN216308882U/en active Active
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