An antenna loop device applicable to blade dynamic stress / dynamic frequency testing

Abstract

An antenna loop device applicable to blade dynamic stress / dynamic frequency testing according to the present invention includes an insulating ring, an antenna loop and an antenna loop support; a groove is provided on the insulating ring, and the antenna loop is arranged in the groove; a plurality of the antenna loop supports are connected to the insulating ring; the insulating ring includes an upper half of the insulating ring and a lower half of the insulating ring that are detachably connected to each other, and the antenna loop includes an upper half of a copper antenna loop and a lower half of a copper antenna loop; the upper half of the copper antenna loop is installed in the upper half of the insulating ring, and the lower half of the copper antenna loop is installed in the lower half of the insulating ring; the upper half of the copper antenna loop and the lower half of the copper antenna loop are connected through a wire on the back of the insulating ring. The present invention can solve the problems of complex installation of the antenna loop and poor signal reception in traditional dynamic stress / dynamic frequency testing, is applicable to testing of various different units, has a simple structure, high safety, low cost, no pollution, and can meet the requirements of blade dynamic stress testing.

Description

Technical Field:

[0001] The present invention relates to an antenna loop device, and particularly to an antenna loop device suitable for blade dynamic stress / dynamic frequency testing. Background Art:

[0002] The blade is the most important and delicate structure in the impeller machinery. Testing the blade dynamic stress can effectively obtain the stress and strain data of the blade in actual use, and testing the blade dynamic frequency can effectively obtain the vibration characteristics of the blade, providing a basis for the structural strength design and fatigue life prediction of the blade.

[0003] The blade dynamic stress / dynamic frequency testing method is to paste strain gauges on the rotating blade, install a signal transmitter on the disk, wirelessly transmit the electrical signal measured by the strain gauge through the signal transmitter using radio signal transmission technology, then use the antenna loop to receive and transmit the signal to the signal receiver and recorder, and then use a data analyzer to analyze the blade dynamic stress / dynamic frequency.

[0004] The antenna loop device is very important as the signal receiving end in the whole test. The traditional antenna loop device is complex to install and has high installation requirements, unable to meet the tests of different units, and also unable to ensure the signal receiving efficiency. Summary of the Invention:

[0005] To solve the problem of the complex structure and high installation requirements of the antenna loop device in the prior art, the present invention provides an antenna loop device suitable for blade dynamic stress / dynamic frequency testing. This device can be installed to adapt to different unit conditions and can effectively obtain the data of blade dynamic stress / dynamic frequency of different units.

[0006] To achieve the above object, the present invention is implemented by adopting the following technical solutions:

[0007] An antenna loop device suitable for blade dynamic stress / dynamic frequency testing, comprising an insulating ring, an antenna loop, and an antenna loop support; a groove is provided on the insulating ring, and the antenna loop is arranged in the groove; a plurality of the antenna loop supports are connected to the insulating ring;

[0008] The insulating ring includes a top half of the insulating ring and a bottom half of the insulating ring that are detachably connected to each other, and the antenna loop includes a top half of the copper antenna loop and a bottom half of the copper antenna loop; the top half of the copper antenna loop is installed in the top half of the insulating ring, and the bottom half of the copper antenna loop is installed in the bottom half of the insulating ring;

[0009] The top half of the copper antenna loop and the bottom half of the copper antenna loop are connected through a wire on the back of the insulating ring.

[0010] A further improvement of the present invention is that the top half of the insulating ring and the bottom half of the insulating ring are connected by a metal clamp.

[0011] A further improvement of the present invention lies in that: the connection part between the upper half and the lower half of the insulating ring is a convex block, and after the two convex blocks come into contact, grooves are formed on both sides; the metal fixture includes two thin plates, which are respectively arranged in the grooves on both sides and fastened by a number of bolts passing through.

[0012] A further improvement of the present invention lies in that: both the upper half and the lower half of the copper antenna ring are respectively bonded to the upper half and the lower half of the insulating ring by glue.

[0013] A further improvement of the present invention lies in that: the upper half and the lower half of the copper antenna ring do not contact each other.

[0014] A further improvement of the present invention lies in that: the antenna ring support includes a support part and a connecting part, and the connecting part penetrates through the insulating ring; the support part is arranged on the back of the insulating ring and is connected to the connecting part at the back.

[0015] A further improvement of the present invention lies in that: the antenna ring support is connected to the insulating ring by a bolt connection method, and both ends of the support part and the connecting part have threads.

[0016] A further improvement of the present invention lies in that: a hexagonal section is provided on the support part of the antenna ring support.

[0017] A further improvement of the present invention lies in that: the antenna ring is arranged near the inner side of the insulating ring.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] An antenna ring device applicable to the dynamic stress / dynamic frequency test of blades of the present invention, both the insulating ring and the antenna ring are connected by adopting an upper and lower semi-circular structure, which simplifies the device structure and solves the problem of complex assembly and disassembly. It can solve the problems of complex installation of the antenna ring and poor signal reception in traditional dynamic stress / dynamic frequency tests. It can be installed to adapt to different unit conditions, can effectively obtain the data of the dynamic stress / dynamic frequency of the blades of different units, provides reliable technical support for the design improvement and safe operation of the blades, can be widely applied in turbomachinery, and improves the safety of the blades. Description of the drawings:

[0020] Figure 1 It is the front view of the whole antenna ring device;

[0021] Figure 2 It is for the antenna ring device Figure 1 The left view of area B in;

[0022] Figure 3 It is for the antenna ring device Figure 1 The sectional view of section A in;

[0023] Wherein: 1. The upper half of the insulating ring; 2. The antenna ring support; 3. The upper half of the copper antenna; 4. The metal fixture; 5. The lower half of the insulating ring; 6. The bolt; 7. The lower half of the copper antenna; 8. The wire. Specific implementation manner:

[0024] In order to make the objectives and technical solutions of the present invention clearer and easier to understand, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. The specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0025] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "plurality" is two or more. In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0026] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0027] See Figure 1 、 Figure 2 、 Figure 3 For an antenna ring device applicable to blade dynamic stress / dynamic frequency testing according to the present invention, it includes an insulating ring, an antenna ring, and the antenna ring support 2; a groove is provided on the insulating ring, and the antenna ring is arranged in the groove; a plurality of the antenna ring supports 2 are connected to the insulating ring;

[0028] The insulating ring includes an upper half 1 of the insulating ring and a lower half 5 of the insulating ring that are detachably connected to each other. The antenna ring includes an upper half 3 of the copper antenna ring and a lower half 7 of the copper antenna ring. The upper half 3 of the copper antenna ring is installed in the upper half 1 of the insulating ring, and the lower half 7 of the copper antenna ring is installed in the lower half 5 of the insulating ring.

[0029] The upper half 3 of the copper antenna ring and the lower half 7 of the copper antenna ring are connected through a wire 8 on the back of the insulating ring. The two wires 8 are respectively connected to the upper and lower antenna rings on the insulating ring, avoiding subsequent wiring problems and also avoiding antenna ring signal problems.

[0030] Using the above-mentioned upper half 1 of the insulating ring and the lower half 5 of the insulating ring that are detachably connected to each other can achieve the rapid installation and disassembly of the antenna ring. At the same time, the contact between the upper half 3 of the copper antenna ring and the lower half 7 of the copper antenna ring is effectively avoided in terms of structure, avoiding the problem of poor signal reception.

[0031] The upper half 3 of the copper antenna ring is installed in the upper half 1 of the insulating ring, and the lower half 7 of the copper antenna ring is installed in the lower half 5 of the insulating ring.

[0032] As a preferred embodiment, the upper half 1 of the insulating ring and the lower half 5 of the insulating ring are connected through a metal fixture 4, and there are several bolts 6 on the metal fixture 4 for fastening.

[0033] The upper half 3 of the copper antenna ring and the lower half 7 of the copper antenna ring are respectively fixed in the upper half 1 of the insulating ring and the lower half 5 of the insulating ring using glue.

[0034] The upper half 3 of the copper antenna ring and the lower half 7 of the copper antenna ring do not contact each other and are connected through the wire 8 on the back of the insulating ring.

[0035] For adaptive matching, the radius of the copper antenna ring needs to be the same as the radius at the balance groove or balance hole on the measured blade wheel disc.

[0036] Several antenna ring supports 2 are installed on the upper half 1 of the insulating ring and the lower half 5 of the insulating ring. The antenna ring supports 2 are connected to the insulating ring by a bolt connection method. Both ends of the antenna ring supports 2 have threads, facilitating the fixing of the antenna ring device in a suitable place.

[0037] The middle section of the antenna ring support 2 has a hexagonal section, facilitating the installation and fixing of the antenna ring support 2.

[0038] As Figure 2 shown, bumps are formed at the connection of the upper half 1 of the insulating ring and the lower half 5 of the insulating ring. After the two bumps contact, grooves are formed on both sides. The metal fixture 4 includes two thin plates, which are respectively arranged in the grooves on both sides and are fastened by several bolts 6 passing through.

[0039] As Figure 3As shown in the figure, the antenna loop is arranged at the part of the insulating ring close to the inner side. The antenna loop support 2 includes a support part and a connecting part. The connecting part is a cylinder with a smaller radius and penetrates through the insulating ring. The support part is arranged on the back of the insulating ring and is connected to the connecting part at the back.

[0040] Among them, the manufacturing process of the present invention is as follows:

[0041] Weld wires at the ends of the upper and lower halves of the copper antenna. The wires pass through the insulating ring. Apply glue to the copper antenna and then fasten it in the groove of the insulating ring to ensure the stability of the copper antenna.

[0042] During test preparation, the antenna loop support can be fixed at a suitable position first. The fixing method can be drilling and tapping at a suitable position to fix the antenna loop support in a suitable position by means of bolt connection, or installing a bracket and installing the antenna loop support on the bracket.

[0043] After installing the antenna loop support, fix the upper half and the lower half of the insulating ring on the antenna loop support. Then fasten the metal fixture, and the antenna loop device is installed. When testing is required, connect the wires to start receiving signals.

[0044] The above embodiments are only used to illustrate the technical concept and features of the present invention, and the purpose is to enable those who are familiar with this technology to understand the content of the present invention and implement it accordingly, and it cannot be used to limit the protection scope of the present invention. All equivalent changes or modifications made according to the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. An antenna loop device suitable for blade dynamic stress / dynamic frequency testing, characterized in that: It includes an insulating ring, an antenna ring, and an antenna ring support; a groove is provided on the insulating ring, and the antenna ring is arranged in the groove; a plurality of the antenna ring supports are connected to the insulating ring; The insulating ring includes an upper half of the insulating ring and a lower half of the insulating ring that are detachably connected to each other, and the antenna ring includes an upper half of the copper antenna ring and a lower half of the copper antenna ring; the upper half of the copper antenna ring is installed in the upper half of the insulating ring, and the lower half of the copper antenna ring is installed in the lower half of the insulating ring; The upper half of the copper antenna ring and the lower half of the copper antenna ring are connected through a wire on the back of the insulating ring; The upper half of the copper antenna ring and the lower half of the copper antenna ring do not contact each other; The upper half of the insulating ring and the lower half of the insulating ring are connected by a metal clamp; The connection part between the upper half of the insulating ring and the lower half of the insulating ring is a bump, and after the two bumps contact, grooves are formed on both sides; the metal clamp includes two thin sheets, and the two thin sheets are respectively arranged in the grooves on both sides and fastened by a number of bolts passing through; The antenna ring support includes a support part and a connection part, and the connection part penetrates through the insulating ring; the support part is arranged on the back of the insulating ring and is connected to the connection part at the back.

2. The antenna loop device applicable to blade dynamic stress / dynamic frequency testing according to claim 1, wherein: Both the upper half of the copper antenna ring and the lower half of the copper antenna ring are respectively bonded in the upper half of the insulating ring and the lower half of the insulating ring by glue.

3. The antenna loop device applicable to blade dynamic stress / dynamic frequency measurement according to claim 1, wherein: The antenna ring support is connected to the insulating ring by a bolt connection method, and both ends of the support part and the connection part have threads.

4. An antenna loop device applicable to blade dynamic stress / dynamic frequency testing according to claim 1, characterized in that: A hexagonal section is provided on the support part of the antenna ring support.

5. The antenna loop device applicable to blade dynamic stress / dynamic frequency testing according to claim 1, wherein: The antenna ring is arranged near the inner side of the insulating ring.

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