A hydrostatic and hydrodynamic resistance test device for the pedestal of a water-cooled wind turbine

Abstract

The present invention discloses a water pressure and water resistance test device for the water-cooled wind turbine pedestal, which comprises a mounting base, a water tank, a water pump, a return pipe, a differential pressure gauge, a pressure gauge, an inlet ball valve, a flowmeter, a throttle valve, a left return water ball valve, a right return water ball valve, a front ball valve, a rear ball valve, a water tank inlet ball valve and a water inlet. The water tank is installed on one side of the top of the mounting base, and the water tank inlet ball valve is arranged on one side surface of the water tank. The device has a simple structure, is easy to operate and convenient to move, and is suitable for use at the production site; the device can respectively complete the water pressure and water resistance tests of the water channels of the generator pedestal, serving two purposes with one machine; the device can separately conduct the water resistance tests on the left and right cavities of the water channels of the generator pedestal, which is convenient for determining the location of welding defects.

Description

Technical Field

[0001] The present invention belongs to the technical field of manufacturing wind turbines, and particularly relates to a water pressure and water resistance test device for the pedestal of a water-cooled wind turbine. Background Art

[0002] In recent years, under the background of vigorously advocating the use of clean energy, wind power generation has developed rapidly. As an energy conversion device, a wind turbine inevitably generates energy losses during the energy conversion process. Most of these lost energies are ultimately converted into heat, causing the temperature of each component of the motor to rise. Therefore, a scientific and effective cooling method is required to cool the generator, thereby reducing the temperature rise of the generator.

[0003] With the continuous progress of technology, the single-unit capacity of wind turbine units has been increasing. Due to the limited space size in the nacelle, the requirements for the size design of the generator are becoming increasingly strict. To reduce the size of the generator, the cooler and the stator are combined into one, and a sandwich layer is designed on the pedestal of the generator as a cooling water channel. The circulating cooling water enters the water channel through the water inlet pipe of the pedestal, flows out from the water outlet pipe of the pedestal through the circuitous water channel of the pedestal, and completes the heat dissipation of the generator through forced water cooling. The temperature rise of the generator is well controlled.

[0004] This sandwich water channel is a welded structure, divided into left and right chambers, which are completely symmetrical and of a maze type. The internal structure is complex, and the anti-leakage and sealing requirements are extremely high. Therefore, the welding quality of the water channel is very important. After the assembly and welding of the water channel are completed, water pressure and water resistance tests must be carried out. Whether the water pressure and water resistance tests of the water channel meet the standards is a key indicator for judging whether the welding of the pedestal is qualified. Currently, there is no device on the market that can perform water pressure and water resistance tests. Summary of the Invention

[0005] The purpose of the present invention is to provide a water pressure and water resistance test device for the pedestal of a water-cooled wind turbine to solve the problems raised in the above background art.

[0006] To achieve the above object, the present invention provides the following technical solution: A water pressure and water resistance test device for the water-cooled wind turbine base, comprising a mounting base, a water tank, a water pump, a return pipe, a differential pressure gauge, a pressure gauge, an inlet ball valve, a flow meter, a throttle valve, a left return ball valve, a right return ball valve, a pre-position ball valve, a post-position ball valve, a water tank inlet ball valve and an inlet. On one side of the top of the mounting base, a water tank is installed. A water tank inlet ball valve is arranged on one side surface of the water tank. The water tank, the water pump, the throttle valve, the flow meter, the inlet ball valve, the pressure gauge and the inlet are connected in sequence through pipelines. The left return ball valve and the right return ball valve are respectively connected to the return pipe through pipelines, and the other end of the return pipe is connected to the water tank. A connecting branch pipe A is connected to one side of the inlet. A connecting branch pipe B is connected to the return pipe. A pre-position ball valve is arranged on the connecting branch pipe A. The other ends of the connecting branch pipe A and the connecting branch pipe B are both connected to the differential pressure gauge. A pipeline is connected between the connecting branch pipe A and the connecting branch pipe B, and a post-position ball valve is arranged on the pipeline.

[0007] Preferably, a universal wheel is provided at each of the four corners of the bottom of the mounting base, and the universal wheel is fixedly connected to the bottom of the mounting base through a fixing bolt.

[0008] Preferably, both ends of the water pump are connected to the pipeline through flanges, and both ends of the inlet ball valve are also connected to the pipeline through flanges.

[0009] Preferably, the mounting base at the bottom of the water pump is fixedly installed on the mounting base through a fixing bolt.

[0010] Compared with the prior art, the beneficial effects of the present invention are as follows: The device has a simple structure, is easy to operate, and is convenient to move, and is suitable for use in the production site; The device can respectively complete the water pressure and water resistance tests of the water channels of the generator base, and has dual functions; The device can separately conduct the water resistance tests on the left and right cavities of the water channels of the generator base, which is convenient for determining the location of welding defects. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a front view structural schematic diagram of the present invention;

[0012] Figure 2 It is a top view structural schematic diagram of the present invention;

[0013] In the figure: 1 - differential pressure gauge, 2 - pressure gauge, 3 - inlet ball valve, 4 - water pump, 5 - flow meter, 6 - throttle valve, 7 - mounting base, 8 - left return ball valve, 9 - right return ball valve, 10 - pre-position ball valve, 11 - post-position ball valve, 12 - return pipe, 13 - water tank, 14 - water tank inlet ball valve, 15 - inlet, 16 - connecting branch pipe A; 17 - connecting branch pipe B. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0014] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0015] Embodiment 1

[0016] Please refer to Figures 1 to 2 , the present invention provides a technical solution: a water pressure and water resistance test device for the water-cooled wind turbine pedestal, including a mounting base 7, a water tank 13, a water pump 4, a return pipe 12, a differential pressure gauge 1, a pressure gauge 2, an inlet ball valve 3, a flow meter 5, a throttle valve 6, a left return ball valve 8, a right return ball valve 9, a pre-position ball valve 10, a post-position ball valve 11, a water tank inlet ball valve 14, and an inlet 15. A water tank 13 is installed on one side of the top of the mounting base 7. A water tank inlet ball valve 14 is arranged on one side surface of the water tank 13. The water tank 13, the water pump 4, the throttle valve 6, the flow meter 5, the inlet ball valve 3, the pressure gauge 2, and the inlet 15 are connected in sequence through pipelines to form the inlet part conveniently. The left return ball valve 8 and the right return ball valve 9 are respectively connected to the return pipe 12 through pipelines, and the other end of the return pipe 12 is connected to the water tank 13 to form the return part conveniently. A connecting branch pipe A16 is connected to one side of the inlet 15, a connecting branch pipe B17 is connected to the return pipe 12. A pre-position ball valve 10 is arranged on the connecting branch pipe A16. The other ends of the connecting branch pipe A16 and the connecting branch pipe B17 are both connected to the differential pressure gauge 1. A pipeline is connected between the connecting branch pipe A16 and the connecting branch pipe B17, and a post-position ball valve 11 is arranged on the pipeline to form the differential pressure measurement part conveniently.

[0017] In this embodiment, preferably, a universal wheel is arranged at each of the four corners of the bottom of the mounting base 7, and the universal wheel is fixedly connected to the bottom of the mounting base 7 through a fixing bolt for convenient movement.

[0018] In this embodiment, preferably, both ends of the water pump 4 are connected to the pipeline through flanges, and both ends of the inlet ball valve 3 are also connected to the pipeline through flanges to ensure the connection tightness.

[0019] In this embodiment, preferably, the mounting base at the bottom of the water pump 4 is fixedly installed on the mounting base 7 through a fixing bolt to ensure the firmness of the installation.

[0020] The working principle and usage process of the present invention: 1) Connect this device to the inlet and outlet water pipelines of the generator pedestal water channel;

[0021] 2) Open the water tank inlet ball valve 14, fill the water tank 13 to the high liquid level, close the water tank inlet ball valve 14, and add an appropriate amount of rust inhibitor to the water;

[0022] 3) Hydrostatic test: Open the left return water ball valve 8, right return water ball valve 9, and rear ball valve 11, and close the inlet ball valve 3 and front ball valve 10; Start the water pump 4, and after the rotation speed is normal, slowly open the inlet ball valve 3; After the operation is stable, slowly adjust the throttle valve 6 to make the indication value of the flowmeter 5 decrease to less than 50 L / min (which can be adjusted according to the actual situation); First, close the left return water ball valve 8, and then slowly close the right return water ball valve 9. When observing that the indication value of the pressure gauge 2 reaches 1.0 - 1.2 MPa, close the inlet ball valve 3 and the water pump 4; Keep the pressure for 1.5 hours, and observe whether there is water seepage at the weld of the water channel. If there is no water seepage, it is qualified; otherwise, it is unqualified.

[0023] 4) Water resistance test: Open the left return water ball valve 8, right return water ball valve 9, and rear ball valve 11, and close the inlet ball valve 3 and front ball valve 10; Start the water pump 4, and slowly open the inlet ball valve 3; After the operation is stable, close the rear ball valve 11 and open the front ball valve 10; Slowly adjust the throttle valve 6 to make the indication value of the flowmeter 5 stable at 150 L / min; Close the left return water ball valve 8, and when observing that the indication value of the differential pressure gauge 1 is between 0.7 - 0.9 bar, it indicates that the water resistance of the right cavity of the water channel is qualified; otherwise, it is unqualified; Open the left return water ball valve 8 and close the right return water ball valve 9. When observing that the indication value of the differential pressure gauge 1 is between 0.7 - 0.9 bar, it indicates that the water resistance of the left cavity of the water channel is qualified; otherwise, it is unqualified.

[0024] 5) After the test is completed, turn off the water pump 4 and drain the water in the return pipe 12 completely; Make a test record.

[0025] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A water-cooled wind turbine pedestal water pressure and water resistance test device, characterized in that: It includes a mounting base (7), a water tank (13), a water pump (4), a return pipe (12), a differential pressure gauge (1), a pressure gauge (2), an inlet ball valve (3), a flow meter (5), a throttle valve (6), a left return ball valve (8), a right return ball valve (9), a pre-positioned ball valve (10), a post-positioned ball valve (11), a water tank inlet ball valve (14) and an inlet (15). One side of the top of the mounting base (7) is provided with a water tank (13). One side surface of the water tank (13) is provided with a water tank inlet ball valve (14). The water tank (13), the water pump (4), the throttle valve (6), the flow meter (5), the inlet ball valve (3), the pressure gauge (2) and the inlet (15) are sequentially connected through pipelines. The left return ball valve (8) and the right return ball valve (9) are respectively connected to the return pipe (12) through pipelines, and the other end of the return pipe (12) is connected to the water tank (13). One side of the inlet (15) is connected with a connecting branch pipe A (16). A connecting branch pipe B (17) is connected to the return pipe (12). A pre-positioned ball valve (10) is arranged on the connecting branch pipe A (16). The other ends of the connecting branch pipe A (16) and the connecting branch pipe B (17) are both connected to the differential pressure gauge (1). A pipeline is connected between the connecting branch pipe A (16) and the connecting branch pipe B (17), and a post-positioned ball valve (11) is arranged on the pipeline.

2. The water-cooled wind turbine pedestal water pressure and water resistance test device according to claim 1, characterized in that: A universal wheel is arranged at each of the four corners of the bottom of the mounting base (7), and the universal wheel is fixedly connected to the bottom of the mounting base (7) through a fixing bolt.

3. The water-cooled wind turbine pedestal water pressure and water resistance test device according to claim 1, characterized in that: Both ends of the water pump (4) are connected to the pipeline through flanges, and both ends of the inlet ball valve (3) are also connected to the pipeline through flanges.

4. The water-cooled wind turbine pedestal water pressure and water resistance test device according to claim 1, characterized in that: The mounting base at the bottom of the water pump (4) is fixedly installed on the mounting base (7) through a fixing bolt.

Images