US-12618768-B2 - Rain erosion test device and system

US12618768B2US 12618768 B2US12618768 B2US 12618768B2US-12618768-B2

Abstract

A rain erosion test device includes an integrated double-wing blade and a drive assembly. The integrated double-wing blade is symmetrical around the center of the integrated double-wing blade, and rotatable around the center in the horizontal plane. A rain erosion sample mold fixing mechanism is provided on a leading edge adjacent to each of two ends of the integrated double-wing blade. The drive assembly is configured to drive the integrated double-wing blade to rotate. The blade of the rain erosion test device has simple machining and a low cost, and can still operate stably when a weight difference between two ends of the blade is up to 1 kg so as to achieve a high error-tolerant rate. The rain erosion test device can realize continuous test on rain erosion resistance of the coating at a speed of 207 m/s or more.

Inventors

Victor LAW
Vida LIU

Assignees

MEGA P&C ADVANCED MATERIALS (SHANGHAI) COMPANY LIMITED

Dates

Publication Date: 20260505
Application Date: 20210322
Priority Date: 20200726

Claims (15)

1 . A rain erosion test device, comprising: an integrated double-wing blade symmetrical around a center of the integrated double-wing blade, and rotatable around the center in a horizontal plane, wherein a rain erosion sample element fixing component is provided on a leading edge adjacent to each of two ends of the integrated double-wing blade; and a drive assembly configured to drive the integrated double-wing blade to rotate, wherein the integrated double-wing blade is shaped as plate, with the center connected to the drive assembly.
2 . The rain erosion test device according to claim 1 , wherein the plate is a rectangular plate.
3 . The rain erosion test device according to claim 2 , wherein arc-shaped extension portions with the center of the integrated double-wing blade as a circle center are respectively arranged at two sides of the center of the integrated double-wing blade.
4 . The rain erosion test device according to claim 1 , wherein the rain erosion sample element fixing component on the leading edge adjacent to each of two ends of the integrated double-wing blade comprises a groove formed in the leading edge of the integrated double-wing blade, and at least one row of fixing holes formed in the groove and arranged along a length direction of the integrated double-wing blade; and a rain erosion sample element is fixed on the leading edge of the integrated double-wing blade through bolts in a plurality of fixing holes of the at least one row of fixing holes.
5 . The rain erosion test device according to claim 1 , wherein the drive assembly is provided below the integrated double-wing blade, and the drive assembly comprises a fixed frame, a drive motor fixed on the fixed frame, and a transmission mechanism configured to connect the drive motor and the integrated double-wing blade; the transmission mechanism comprises a rotating shaft; and the rotating shaft is rotatably connected to the fixed frame through a bearing, inserted into the center of the integrated double-wing blade, and configured to drive the integrated double-wing blade to rotate.
6 . The rain erosion test device according to claim 5 , further comprising a rain baffle assembly, wherein the rain baffle assembly comprises a rain cover surrounding the fixed frame, a first rain baffle disc provided on a top of the fixed frame, and a second rain baffle disc fixed below the integrated double-wing blade; the first rain baffle disc and the second rain baffle disc are concentric with the center of the integrated double-wing blade, respectively; and the bearing is provided between the first rain baffle disc and the second rain baffle disc.
7 . The rain erosion test device according to claim 6 , further comprising a cable protection pipeline, wherein a first end of the cable protection pipeline is connected to the rain cover, and a second end of the cable protection pipeline is connected to a power supply.
8 . A rain erosion test system, comprising a rain spray frame, a rain gauge, a base portion including a drainage groove, and the rain erosion test device according to claim 1 , wherein the rain erosion test device is provided in the rain spray frame; a plurality of rain spray nozzles located above the rain erosion test device and surrounding the rain erosion test device are arranged on the rain spray frame; the rain gauge is configured to obtain a rain spraying amount; and the drainage groove is arranged around an outer periphery of the rain spray frame.
9 . The rain erosion test system according to claim 8 , wherein the rain erosion test system is provided in an enclosable space with an enclosing wall at a periphery; and the drainage groove is arranged along an inner side of the enclosing wall; and the plurality of rain spray nozzles are arranged at 0.5 m-10 m above the rain erosion test device.
10 . The rain erosion test system according to claim 8 , wherein in the rain erosion test device, the integrated double-wing blade is shaped as a rectangular plate, with the center connected to the drive assembly.
11 . The rain erosion test system according to claim 10 , wherein in the rain erosion test device, arc-shaped extension portions with the center of the integrated double-wing blade as a circle center are respectively arranged at two sides of the center of the integrated double-wing blade.
12 . The rain erosion test system according to claim 8 , wherein in the rain erosion test device, the rain erosion sample element fixing component comprises a groove formed in the leading edge of the integrated double-wing blade, and at least one row of fixing holes formed in the groove and arranged along a length direction of the integrated double-wing blade; and a rain erosion sample element is fixed on the leading edge of the integrated double-wing blade through bolts in a plurality of fixing holes of the at least one row of fixing holes.
13 . The rain erosion test system according to claim 8 , wherein in the rain erosion test device, the drive assembly is provided below the integrated double-wing blade, and the drive assembly comprises a fixed frame, a drive motor fixed on the fixed frame, and a transmission mechanism configured to connect the drive motor and the integrated double-wing blade; the transmission mechanism comprises a rotating shaft; and the rotating shaft is rotatably connected to the fixed frame through a bearing, inserted into the center of the integrated double-wing blade, and configured to drive the integrated double-wing blade to rotate.
14 . The rain erosion test system according to claim 13 , wherein the rain erosion test device further comprises a rain baffle assembly, wherein the rain baffle assembly comprises a rain cover surrounding the fixed frame, a first rain baffle disc provided on a top of the fixed frame, and a second rain baffle disc fixed below the integrated double-wing blade; the first rain baffle disc and the second rain baffle disc are concentric with the center of the integrated double-wing blade, respectively; and the bearing is provided between the first rain baffle disc and the second rain baffle disc.
15 . The rain erosion test system according to claim 14 , wherein the rain erosion test device further comprises a cable protection pipeline, wherein a first end of the cable protection pipeline is connected to the rain cover, and a second end of the cable protection pipeline is connected to a power supply.

Description

CROSS REFERENCE TO THE RELATED APPLICATIONS This application is the national phase entry of International Application No. PCT/CN2021/082162, filed on Mar. 22, 2021, which is based upon and claims priority to Chinese Patent Application No. 202010726988.5, filed on Jul. 26, 2020, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD The present disclosure relates to the technical field of test on rain erosion resistance of a coating, and in particular to a rain erosion test device and system. BACKGROUND For devices working at high speeds in exposed environments, such as high-speed trains and wind turbine blades, erosion to a surface coating is always a matter of great concern. Rain erosion is considered as the leading disruptive factor. In research and development on the coating of the high-speed trains and wind turbine blades, it is important to evaluate rain erosion resistance of the coating in a high-speed state. There have been mainly two methods to evaluate the rain erosion resistance of the coating. In one method, the coating is applied to a film to form a sample, and the sample is placed statically for direct rain test. With long detection time, this method is only applicable to testing rain erosion resistance of the common coating, rather than the coating in the high-speed state. The other method is to use a three-blade rain erosion tester. The rain erosion tester includes a three-blade structure shown in FIG. 1. In the test, a sample is fixed on the three-blade structure. The three-blade structure is driven by a motor to rotate, thereby simulating a working condition of the coating in the high-speed state. Three coating samples can be tested at once. However, the tester has the following problems in long-term use: (1) The three-blade structure is complicated. To achieve a desired speed, diameters of the blades are to be increased. In case of meter-level diameters, it is highly difficult to machine the blades, and ensure that the three blades are located on the same circumferential plane and are distributed uniformly. At present, the three-blade structure is dependent on imports and expensive. Thus, a set of tester is sold for RMB 4 million Yuan.(2) In order to make the three blades located on the same circumferential plane as much as possible, the blades are thickened, and higher requirements are also imposed on a drive mechanism. Consequently, for a fixed driving power, there is a lower rotational speed.(3) The three-blade rain erosion tester has a low error-tolerant rate. Typically, the tester can only withstand a weight difference of 30 g in the test. Otherwise, the resulting asymmetry may damage the motor, or cause safety accidents. Even falling-off of the coating in the test will make the tester work abnormally. Hence, the tester is stopped basically every 15 min.(4) Due to limitations in blade machining, error-tolerant rate and other factors, when the blades have a diameter of 1 m, the three-blade rain erosion tester can only test the rain erosion resistance of the coating at a speed of less than 160 m/s. This cannot satisfy test requirements on rain erosion resistance of the coating of the large-diameter wind turbine blades. SUMMARY An objective of the present disclosure is to provide a rain erosion test device and system, to overcome defects in the prior art. The blade has simple machining, a low cost and a high error-tolerant rate (stable operation can still be achieved when a weight difference between two ends of the blade is up to 1 kg). The present disclosure can realize continuous test on rain erosion resistance of the coating at a speed of 207 m/s or more, and even can realize continuous test on rain erosion resistance of the coating at a speed of 300 m/s or more through improvement. The objective of the present disclosure can be achieved by the following technical solutions: The present disclosure provides a rain erosion test device, including: an integrated double-wing blade symmetrical around a center of the integrated double-wing blade, and rotatable around the center in a horizontal plane, where a rain erosion sample mold fixing mechanism is provided on a leading edge adjacent to each of two ends of the integrated double-wing blade; anda drive assembly configured to drive the integrated double-wing blade to rotate. As a preferred technical solution of the present disclosure, the integrated double-wing blade is shaped as a rectangular plate, with the center connected to the drive assembly. As a preferred technical solution of the present disclosure, arc-shaped extension portions with the center as a circle center are respectively arranged at two sides of the center of the integrated double-wing blade. As a preferred technical solution of the present disclosure, the rain erosion sample mold fixing mechanism includes a groove formed in the leading edge of the integrated double-wing blade, and at least one row of fixing holes formed in the groove and arrang