CN213632489U - Centrifugal switch device and signal transmitting device suitable for blade dynamic stress test - Google Patents
Centrifugal switch device and signal transmitting device suitable for blade dynamic stress test Download PDFInfo
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- CN213632489U CN213632489U CN202022716681.5U CN202022716681U CN213632489U CN 213632489 U CN213632489 U CN 213632489U CN 202022716681 U CN202022716681 U CN 202022716681U CN 213632489 U CN213632489 U CN 213632489U
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- metal shell
- switch device
- shaped copper
- centrifugal switch
- copper column
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Abstract
A centrifugal switch device and a signal transmitting device suitable for testing dynamic stress of a blade comprise a metal shell and a circular cover plate arranged on the upper portion of the metal shell, wherein an insulating gasket is arranged in the hollow portion of the lower portion of the metal shell and is fixed on the lower portion of the metal shell through an insulating gasket lantern ring. A T-shaped copper column is arranged in the metal shell, a spring is sleeved on the T-shaped copper column, and the lower portion of the T-shaped copper column penetrates through an insulating washer. The number of the conducting wires is two, one conducting wire is arranged on the lower end face of the T-shaped copper column, and the other conducting wire is arranged on the outer surface of the metal shell. The insulating support is fixed on the upper part of the circular cover plate. The utility model provides an in the blade dynamic stress test because the limited data acquisition who causes of battery power problem too few, simple structure, the security is high, and is with low costs, pollution-free, can satisfy blade dynamic stress test requirement.
Description
Technical Field
The utility model relates to a blade dynamic stress test technical field, in particular to centrifugal switch device and signal emission device suitable for blade dynamic stress test.
Background
The blade is the most important and most fine structure in the impeller machinery, and the stress-strain data of the blade in actual use can be effectively obtained by testing the dynamic stress of the blade, so that a basis is provided for the structural strength design and the fatigue life prediction of the blade.
The core of the blade dynamic stress testing method is that a signal transmitter is installed on a rotating blade disc by utilizing a radio signal transmission technology, an electric signal measured by a strain gauge is wirelessly transmitted by the signal transmitter, then a signal receiver and a recorder are utilized for receiving and collecting, and then a data analyzer is utilized for analyzing the blade dynamic stress.
The signal transmitter box is arranged in a balance groove of the blade, and when the actual unit blade is measured, the signal transmitter box needs to be arranged after the cylinder is opened. Traditional signal transmitter is by battery powered, and battery powered time is shorter, and the transmitter box in case install, can't change the battery during the unit operation, only during the unit overhauls, just can change by reopening the jar. Therefore, the dynamic stress of the blade can be measured only in a short time, which is not beneficial to obtaining accurate data and can not obtain the long-time dynamic stress data of the blade.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to the not enough of above-mentioned prior art, provide a centrifugal switch device and signal emission device suitable for blade dynamic stress test.
In order to achieve the above purpose, the utility model adopts the following technical scheme to realize:
a centrifugal switch device comprises a metal shell, a T-shaped copper column and a lead;
a round cover plate is arranged at the upper part of the metal shell, and an insulating gasket is arranged at the hollow part of the lower part of the metal shell; the upper part of the circular cover plate is provided with an insulating support;
the T-shaped copper column is arranged in the metal shell and provided with a connecting shaft and a contact wall, and the connecting shaft is arranged in the center of the contact wall; the lower part of the connecting shaft penetrates through the insulating washer, and the connecting shaft is sleeved with a spring; one end of the spring is in contact with the top of the T-shaped copper column, and the other end of the spring is in contact with the insulating washer;
the number of the conducting wires is two, one conducting wire is connected with the lower end of the connecting shaft, and the other conducting wire is connected with the outer surface of the metal shell.
The utility model discloses further improvement lies in: the contact wall of the T-shaped copper column is of a cylindrical structure, and the connecting shaft is arranged in the center of the contact wall cylinder and is connected with the top of the contact wall.
The utility model discloses further improvement lies in: the insulating washer is fixed on the lower part of the metal shell through an insulating washer lantern ring.
The utility model discloses further improvement lies in: the insulating washer and the insulating washer lantern ring are made of high-temperature-resistant insulating materials, and the insulating washer and the contact part of the insulating washer and the metal shell are coated with glue for fixation.
The utility model discloses further improvement lies in: the lower surface of the round cover plate is provided with an insulating material layer, and the insulating material layer is tightly buckled on the metal shell through glue.
The utility model discloses further improvement lies in: the metal shell is of a cylindrical structure, and the inner cavity of the metal shell is a cylindrical cavity.
The utility model discloses further improvement lies in: when the centrifugal force borne by the T-shaped copper column is smaller than the elastic force of the spring, the T-shaped copper column is not in contact with the metal shell;
when the centrifugal force borne by the T-shaped copper column is larger than the elastic force of the spring, the T-shaped copper column is in contact with the metal shell.
A signal transmitting device comprises a transmitter box and a centrifugal switch device; the centrifugal switch device is arranged in the transmitter box;
the transmitter box is internally provided with a signal transmitter and a battery, and the centrifugal switch device is connected between the battery and the signal transmitter in series.
The utility model discloses further improvement lies in: the centrifugal switch device is connected with a clamping groove in the transmitter box through an insulating support, the centrifugal switch device is not in contact with the inner wall surface of the transmitter box, and the T-shaped copper column is perpendicular to the arc side surface of the transmitter box.
The utility model discloses further improvement lies in: and two wires of the centrifugal switch device are respectively connected with a signal transmitter or a battery.
Compared with the prior art, the utility model has the advantages of it is following:
the utility model relates to a centrifugal switch device suitable for blade dynamic stress test, through the structure that the spring is arranged on the T-shaped copper column, when the centrifugal force that the T-shaped copper column receives is smaller than the elastic force of the spring, the T-shaped copper column does not contact with the metal shell; when the centrifugal force borne by the T-shaped copper column is larger than the elastic force of the spring, the T-shaped copper column is in contact with the metal shell. The circuit is switched on and off by the centrifugal force. The problem of the data acquisition that causes owing to the battery electric quantity is limited in traditional dynamic stress test too little can be solved for the battery just begins to supply power to signal transmitter under the high-speed operating condition of blade, just breaks off circuit when the blade rotational speed reduces to a definite value, stops supplying power. The dynamic stress testing time is greatly prolonged, the dynamic stress data of the blades of the unit under different loads can be effectively acquired, reliable technical support is provided for design improvement and safe operation of the blades, and the dynamic stress testing method can be widely applied to impeller machinery and improves the safety of the blades.
The utility model discloses a signal emission device adopts centrifugal switch device can realize in the test process blade rotational speed and just open circuit when reducing a definite value, the power supply that stops. The dynamic stress measurement method can measure the dynamic stress of the blade in a short time, is favorable for obtaining accurate data, and can also obtain long-time dynamic stress data of the blade. The utility model provides an in the blade dynamic stress test because the limited data acquisition who causes of battery power problem too few, simple structure, the security is high, and is with low costs, pollution-free, can satisfy blade dynamic stress test requirement.
Description of the drawings:
fig. 1 is a front view of the centrifugal switch device as a whole;
FIG. 2 is a plan view of the centrifugal switch device as a whole;
FIG. 3 is a front view of an insulating washer and insulating washer collar;
FIG. 4 is a top view of an insulating washer and insulating washer collar;
FIG. 5 is a top view of a transmitter case containing a centrifugal switch device;
FIG. 6 is a cross-sectional view of the transmitter case taken along section A;
wherein: 1. a circular cover plate; 2. insulating support; 3. a metal housing; 4. a T-shaped copper column; 5. an insulating washer; 6. an insulating washer collar; 7. a wire; 8. a spring; 9. a transmitter box; 10. a card slot; 11. a signal transmitter; 12. a battery.
The specific implementation mode is as follows:
in order to make the purpose and technical scheme of the utility model clearer and more convenient to understand. The present invention will be described in further detail with reference to the following drawings and examples, wherein the specific examples are provided for the purpose of illustration only and are not intended to be limiting.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified. In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, 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 invention can be understood in specific cases to those skilled in the art.
The invention will be described in further detail with reference to the following figures and specific embodiments:
see fig. 1, fig. 2, fig. 3, fig. 4, the utility model relates to a centrifugal switch device suitable for blade dynamic stress test, including metal casing 3, install circular apron 1 on metal casing 3 upper portion, metal casing 3 lower part hollow portion installs insulating washer 5 to fix in metal casing 3 lower part through insulating washer lantern ring 6. A T-shaped copper column 4 is arranged in the metal shell 3, a spring 8 is sleeved on the T-shaped copper column 4, and the lower portion of the T-shaped copper column 4 penetrates through an insulating washer 5. The number of the conducting wires 7 is two, one conducting wire is arranged on the lower end face of the T-shaped copper column 4, and the other conducting wire is arranged on the outer surface of the metal shell 3. The insulating support 2 is fixed on the upper part of the circular cover plate 1.
Specifically, the T-shaped copper column 4 is arranged in the metal shell 3, the T-shaped copper column 4 is provided with a connecting shaft and a contact wall, and the connecting shaft is arranged in the center of the contact wall; the lower part of the connecting shaft penetrates through the insulating washer 5, and a spring 8 is sleeved on the connecting shaft; one end of the spring 8 is contacted with the top of the T-shaped copper column 4, and the other end is contacted with the insulating washer 5.
The lower surface of the circular cover plate 1 is made of insulating materials and is fastened on the metal shell 3 through gluing. The insulating material can ensure that the T-shaped copper column 4 is not communicated with the metal shell 3 when the rotating speed of the blade is low.
The lower part of the T-shaped copper column 4 passes through the insulating washer 5 and is fixed in the metal shell 3.
The spring 8 is sleeved on the T-shaped copper column 4, so that the T-shaped copper column 4 is not contacted with the metal shell 3.
Insulating washer 5 and insulating washer lantern ring 6 all adopt high temperature resistant insulating material to make and form, and insulating washer 5 fixes in metal casing 3 lower part through insulating washer lantern ring 6, and insulating washer 5 scribbles glue with metal casing 3 contact site, can strengthen fixedly.
Further, the height of the spring needs to ensure that the T-shaped copper column 4 is not in contact with the metal shell 3, and the stiffness coefficient of the spring needs to meet the requirement that when the rotating speed of the blade reaches a certain value, the centrifugal force borne by the T-shaped copper column can enable the spring to be compressed, so that the T-shaped copper column 4 is connected with the metal shell 3.
Referring to fig. 5 and 6, the signal transmitting device of the present invention is installed in a transmitter box 9 through an insulating support. Guarantee centrifugal switch and transmitter box internal surface contact, guarantee T type copper post 4 perpendicular to transmitter box circular arc side simultaneously, after the transmitter box was installed at blade rim plate balancing tank, the unit was in service, and the centrifugal force direction that T type copper post received is radial along the rim plate. The transmitter 11 is connected in series with the battery through a wire and a signal transmitter.
The centrifugal switch device suitable for testing the dynamic stress of the blade is arranged in a transmitter box 9 and is connected with a clamping groove 10 on the transmitter box 9 through an insulating support 2. The transmitter case 9 houses a signal transmitter 11 and a battery 12.
The centrifugal switch is integrally fixed on a clamping groove 10 of the transmitter box through an insulating support 2, the centrifugal switch is not contacted with the inner wall surface of the transmitter box due to the fixed position, and meanwhile, the T-shaped copper column 4 is ensured to be vertical to the arc side surface of the transmitter box.
The centrifugal switch is connected in series between the battery 12 and the signal transmitter, and the two conducting wires 7 are not divided into positive and negative.
For a further understanding of the present invention, the operation thereof will now be described as follows.
When the blade is rotatory, T type copper post 4 can extrude spring 8 under the effect of centrifugal force, and when the rotational speed reachd certain numerical value, T type copper post 4 will contact with metal casing 3 for battery and signal transmitter switch on, and signal transmitter begins to work, sends dynamic stress test data. When the running speed of the unit is less than a certain value, the centrifugal force borne by the T-shaped copper column is less than the elastic force of the spring 8, the T-shaped copper column 4 is separated from the metal shell 3, the circuit is disconnected, and the signal transmitter stops working. Therefore, the battery can be ensured to be supplied with power only when the unit runs to a certain rotating speed, the time of the dynamic stress test can be prolonged, and data as detailed as possible can be obtained for analysis and calculation.
The above embodiments are only for illustrating the technical conception and the features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention, which should not limit the scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.
Claims (10)
1. The utility model provides a centrifugal switch device suitable for blade dynamic stress test which characterized in that: the device comprises a metal shell, a T-shaped copper column and a lead;
a round cover plate is arranged at the upper part of the metal shell, and an insulating gasket is arranged at the hollow part of the lower part of the metal shell; the upper part of the circular cover plate is provided with an insulating support;
the T-shaped copper column is arranged in the metal shell and provided with a connecting shaft and a contact wall, and the connecting shaft is arranged in the center of the contact wall; the lower part of the connecting shaft penetrates through the insulating washer, and the connecting shaft is sleeved with a spring; one end of the spring is in contact with the top of the T-shaped copper column, and the other end of the spring is in contact with the insulating washer;
the number of the conducting wires is two, one conducting wire is connected with the lower end of the connecting shaft, and the other conducting wire is connected with the outer surface of the metal shell.
2. A centrifugal switch device suitable for blade dynamic stress testing according to claim 1, wherein: the contact wall of the T-shaped copper column is of a cylindrical structure, and the connecting shaft is arranged in the center of the contact wall cylinder and is connected with the top of the contact wall.
3. A centrifugal switch device suitable for blade dynamic stress testing according to claim 1, wherein: the insulating washer is fixed on the lower part of the metal shell through an insulating washer lantern ring.
4. A centrifugal switch device suitable for blade dynamic stress testing according to claim 3, wherein: the insulating washer and the insulating washer lantern ring are both made of high-temperature-resistant insulating materials, and the insulating washer and the contact part of the insulating washer and the metal shell are coated with glue for fixation.
5. A centrifugal switch device suitable for blade dynamic stress testing according to claim 1, wherein: the lower surface of the circular cover plate is provided with an insulating material layer, and the insulating material layer is tightly buckled on the metal shell through glue.
6. A centrifugal switch device suitable for blade dynamic stress testing according to claim 1, wherein: the metal shell is of a cylindrical structure, and the inner cavity of the metal shell is a cylindrical cavity.
7. A centrifugal switch device suitable for blade dynamic stress testing according to claim 1, wherein: when the centrifugal force borne by the T-shaped copper column is smaller than the elastic force of the spring, the T-shaped copper column is not in contact with the metal shell;
when the centrifugal force borne by the T-shaped copper column is larger than the elastic force of the spring, the T-shaped copper column is in contact with the metal shell.
8. A signal transmitting apparatus, characterized in that: comprising a transmitter case and a centrifugal switch device according to any one of claims 1 to 7; the centrifugal switch device is arranged in the transmitter box;
the transmitter box is internally provided with a signal transmitter and a battery, and the centrifugal switch device is connected between the battery and the signal transmitter in series.
9. A signal transmission apparatus according to claim 8, wherein: the centrifugal switch device is connected with a clamping groove in the transmitter box through an insulating support, the centrifugal switch device is not in contact with the inner wall surface of the transmitter box, and the T-shaped copper column is perpendicular to the arc side surface of the transmitter box.
10. A signal transmission apparatus according to claim 8, wherein: the centrifugal switch device is connected with the signal transmitter and the battery in series through two wires.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022716681.5U CN213632489U (en) | 2020-11-20 | 2020-11-20 | Centrifugal switch device and signal transmitting device suitable for blade dynamic stress test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022716681.5U CN213632489U (en) | 2020-11-20 | 2020-11-20 | Centrifugal switch device and signal transmitting device suitable for blade dynamic stress test |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213632489U true CN213632489U (en) | 2021-07-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022716681.5U Active CN213632489U (en) | 2020-11-20 | 2020-11-20 | Centrifugal switch device and signal transmitting device suitable for blade dynamic stress test |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213632489U (en) |
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2020
- 2020-11-20 CN CN202022716681.5U patent/CN213632489U/en active Active
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