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CN-224231130-U - Dynamic stress test system

CN224231130UCN 224231130 UCN224231130 UCN 224231130UCN-224231130-U

Abstract

The application relates to the technical field of testing, and provides a dynamic stress testing system. The dynamic stress test system is applied to the generator. The generator comprises a rotating piece and a test piece to be tested. The rotating piece and the test piece to be tested synchronously rotate. The dynamic stress test system comprises a strain gauge, a telemetry device and a terminal. The strain gauge is configured to be mounted to a test piece to be tested. The remote sensing device is configured to be mounted on the rotating member, is electrically connected with the strain gauge, and is used for receiving a voltage signal fed back by the strain gauge and converting the voltage signal into a wireless communication signal. The terminal is connected with the remote measuring device through wireless signals and is used for receiving wireless communication signals and converting the wireless communication signals into dynamic stress parameters. Therefore, the original slip ring structure is replaced by the cooperation of the strain gauge and the telemetering device, and the strain gauge and the telemetering device are both arranged on the rotating component, so that the requirements of the test environment of the test piece to be tested can be reduced.

Inventors

  • WANG YONGWEI
  • YANG BOHAN
  • WANG MINGKUN
  • ZHANG XIKE
  • WANG SHIJIAN
  • HE SHUANGJUN
  • Fan yangming
  • ZHAO XINGWANG
  • ZHOU JUNPENG
  • TANG QIN

Assignees

  • 东方电气集团东方电机有限公司
  • 山东泰山抽水蓄能有限公司

Dates

Publication Date
20260512
Application Date
20250522

Claims (10)

  1. 1. The utility model provides a dynamic stress test system, is applied to the generator, the generator includes rotation piece (4) and test piece (5) that awaits measuring, rotation piece (4) with test piece (5) synchronous rotation awaits measuring, its characterized in that, dynamic stress test system includes: a strain gauge (1) configured to be mounted to the test piece (5) to be tested; A telemetry device (2) configured to be mounted on the rotating member (4), wherein the telemetry device (2) is electrically connected with the strain gauge (1) and is used for receiving a voltage signal fed back by the strain gauge (1) and converting the voltage signal into a wireless communication signal; and the terminal (3) is connected with the remote measuring device (2) in a wireless signal manner, and is used for receiving the wireless communication signal and converting the wireless communication signal into dynamic stress parameters.
  2. 2. Dynamic stress test system according to claim 1, characterized in that the telemetry device (2) is arranged at a distance from the test piece (5) to be tested in the axial direction of the rotating member (4).
  3. 3. Dynamic stress testing system according to claim 1, wherein at least two strain gauges (1) are provided, at least two strain gauges (1) being arranged at intervals along the axial direction of the test piece (5) to be tested.
  4. 4. A dynamic stress testing system according to claim 3, wherein at least two strain gauges (1) axially arranged along the test piece (5) to be tested form a strain gauge group (11), the strain gauge group (11) is arranged in at least two, and at least two strain gauge groups (11) are arranged at intervals along the circumferential direction of the test piece (5) to be tested.
  5. 5. A dynamic stress testing system according to claim 3, wherein the telemetry device (2) has at least two signal channels, each of which is electrically connected to one of the strain gauges (1), wherein each of the signal channels transmits an electrical signal simultaneously.
  6. 6. Dynamic stress testing system according to claim 1, wherein at least two of the telemetry devices (2) are provided, at least two of the telemetry devices (2) being provided on the outer circumferential surface of the rotating member (4) in a central symmetry.
  7. 7. Dynamic stress testing system according to claim 1, characterized in that the terminal (3) comprises: A signal receiver (31) in wireless signal connection with the telemetry device (2); and a signal processor (32) electrically connected to the signal receiver (31).
  8. 8. The dynamic stress test system according to claim 7, wherein the signal receiver (31) is a WIFI signal receiver.
  9. 9. Dynamic stress test system according to claim 1, characterized in that the telemetry device (2) comprises a full bridge test module (21), a half bridge test module (22) and a 1/4 bridge test module (23), or The telemetry device (2) has a bridge module (24), the bridge module (24) integrating a full-bridge test unit (241), a half-bridge test unit (242), and a 1/4-bridge test unit (243).
  10. 10. The dynamic stress test system according to claim 1, wherein the test piece (5) to be tested is a guard ring, the generator comprises a rotor winding, the rotor winding is provided with a plurality of wire bars distributed along the circumferential direction, the guard ring is sleeved outside the wire bars, and the strain gauge (1) is arranged on the outer surface of the guard ring.

Description

Dynamic stress test system Technical Field The application relates to the technical field of testing, in particular to a dynamic stress testing system. Background In the related art, a protection ring needs to be sleeved outside a rotor bar of the generator so as to prevent insulation damage caused by large deformation of the rotor bar due to centrifugal force. Because the guard ring can rotate along with the rotor winding, the guard ring needs to be subjected to a dynamic stress test so as to ensure that the guard ring meets the use requirement, and the simulation calculation result is verified and the technical scheme is optimized by technicians. However, at present, a slip ring structure is generally required to perform dynamic stress test on a rotating component, the slip ring structure comprises a static component and a dynamic component, the static component and the dynamic component are respectively fixed on the static structure and the rotor structure, a test piece to be tested cannot have too large axial or radial displacement, and the stability requirement on the test piece to be tested is high. Disclosure of utility model The embodiment of the application provides a dynamic stress test system, which eliminates the use of a slip ring structure, and can reduce the stability requirement of a test piece to be tested so as to at least partially solve the technical problems. In order to achieve the above object, according to a first aspect of the present application, there is provided a dynamic stress test system applied to a generator including a rotating member and a test piece to be tested, the rotating member rotating in synchronization with the test piece to be tested, the dynamic stress test system including: The strain gauge is configured to be mounted on the test piece to be tested; The remote measuring device is configured to be installed on the rotating piece, is electrically connected with the strain gauge and is used for receiving a voltage signal fed back by the strain gauge and converting the voltage signal into a wireless communication signal; And the terminal is connected with the remote measuring device through a wireless signal and is used for receiving the wireless communication signal and converting the wireless communication signal into dynamic stress parameters. Optionally, along the axial direction of the rotating member, the telemetry device and the test piece to be tested are arranged at intervals. Optionally, the number of the strain gauges is at least two, and at least two strain gauges are axially arranged at intervals along the test piece to be tested. Optionally, at least two strain gauges axially arranged along the test piece to be tested form a strain gauge group, the strain gauge group is at least two, and at least two strain gauge groups are circumferentially arranged at intervals along the test piece to be tested. Optionally, the telemetry device has at least two signal channels, each of the signal channels being electrically connected to one of the strain gauges, wherein each of the signal channels transmits an electrical signal in synchronization. Optionally, the number of the telemetry devices is at least two, and the at least two telemetry devices are arranged on the outer peripheral surface of the rotating piece in a central symmetry mode. Optionally, the terminal includes: A signal receiver in wireless signal connection with the telemetry device; and the signal processor is electrically connected with the signal receiver. Optionally, the signal receiver is a WIFI signal receiver. Optionally, the telemetry device comprises a full bridge test module, a half bridge test module and a 1/4 bridge test module, or The telemetry device has a bridge module integrated with a full-bridge test unit, a half-bridge test unit, and a 1/4-bridge test unit. Optionally, the test piece to be tested is a guard ring, the generator comprises a rotor winding, the rotor winding is provided with a plurality of wire bars distributed along the circumferential direction, the guard ring is sleeved outside the wire bars, and the strain gauge is arranged on the outer surface of the guard ring. In the dynamic stress test system provided by the embodiment of the application, the strain gauge is arranged on the test piece to be tested, the remote measuring device is arranged on the rotating piece, the strain gauge transmits the tested electric signal to the remote measuring device, and the wireless signal of the remote measuring device is transmitted to the terminal, so that the dynamic stress test is realized. According to the embodiment of the application, the original slip ring structure is replaced by matching the strain gauge and the telemetering device, and the strain gauge and the telemetering device are both arranged on the rotating part, so that the requirements of the test environment of the test piece to be tested can be reduced. Additional features and advantages of the application wil