Compressor blade crack damage acceleration device and method

Abstract

The present invention discloses a compressor blade crack damage acceleration device and method, the device includes an air inlet pipe, an air outlet pipe, a top cover, an outer shell, a flow limiting funnel, a gathering funnel, a flow control device, an air inlet connecting pipe, and an abrasive. The air inlet and air outlet of the compressor are respectively connected to the air inlet pipe and the air outlet pipe, the air inlet pipe is installed at the bottom of the outer shell, the air outlet pipe passes through the top cover and is placed on the top of the outer shell, a flow limiting funnel is provided in the middle position of the outer shell, the flow control device adjusts the flow of the abrasive through the flow limiting funnel, a gathering funnel is provided at the bottom of the outer shell, and the gathering funnel is connected to the air inlet pipe through the air inlet connecting pipe. The flow of the abrasive is adjusted by adjusting the flow control device, and the abrasive circulates in the compressor and the compressor blade crack damage acceleration device to accelerate the compressor blade crack damage. The present invention is simple and easy to implement, and can accurately adjust the flow of the abrasive to control the degree of compressor blade crack damage and the required time, so as to achieve the effect of accelerating the compressor blade crack damage.

Description

Technical Field

[0001] The present invention relates to the technical field of blade crack damage generation, and in particular to a compressor blade crack damage acceleration device and method. Background Art

[0002] Compressors are widely used in the fields of petrochemicals, electric power, etc. Blades, as core components, are prone to crack failures under the action of centrifugal force, friction and unstable airflow loads, which can affect the normal operation of the entire compressor. Therefore, timely detection of blade crack failures is of great significance to ensure the safe and stable operation of the compressor. In addition, in order to study the crack damage of compressor blades, a large number of compressor blades with different degrees of crack damage are required. However, in actual engineering, the generation of crack damage in compressor blades is accidental and uncertain, making it difficult to quickly obtain compressor blades with different degrees of crack damage. Therefore, how to simulate the crack damage generation process of compressor blades, accelerate the crack damage of compressor blades, and obtain compressor blades with different degrees of crack damage deserves in-depth study.

[0003] Traditional compressor blades with different degrees of crack damage are often processed manually, resulting in fixed blade crack shapes and appearing in specific locations. However, actual compressor blade cracks are often evenly distributed on different blades, and the crack shapes are irregular. There is a certain difference between the artificially processed blade crack damage and the actual one, which in turn affects the analysis and research of blade crack loss. Therefore, there is an urgent need for a device and method that can simulate the compressor blade crack damage formation process and use abrasives to obtain compressor blades with different degrees of crack damage in a real and fast manner. Summary of the invention

[0004] The purpose of the present invention is to address the defects of the prior art and provide a compressor blade crack damage acceleration device and method to overcome the current situation of low authenticity and long actual processing time of manual processing of compressor blade crack damage, and effectively realize the rapid acquisition of compressor blades with different degrees of crack damage.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] A compressor blade crack damage acceleration device, characterized in that it includes an outer shell, an air inlet pipe, an air outlet pipe, a top cover, a flow control device, a gathering funnel and an abrasive, the flow control device and the gathering funnel are arranged in the outer shell in sequence from top to bottom, the top cover is connected to the top of the outer shell, the air inlet pipe is arranged at the bottom of the outer shell, one end of which is connected to the air outlet of the compressor, and the other end is connected to the bottom of the gathering funnel, the air outlet pipe is arranged at the top of the outer shell, one end of which is connected to the air inlet of the compressor, and the other end is connected to the top cover, the abrasive circulates in the device, the gathering funnel is provided with a plurality of circular holes, and the flow control device can adjust the circulation flow of the abrasive in the entire device.

[0007] Furthermore, the flow control device includes a flow limiting funnel, a slide rail, an adjusting wheel, a shielding cloth, a tightening wheel, a tightening wheel shaft and a spring sheet. The slide rail is horizontally fixed on the outer shell, the adjusting wheel can move horizontally along the slot on the slide rail, the tightening wheel is connected to the outer shell through the tightening wheel shaft, one end of the shielding cloth is connected to the adjusting wheel, and the other end is wound around the tightening wheel. The spring sheet is arranged on the tightening wheel and can drive the tightening wheel to rotate and wind around the shielding cloth. The flow limiting funnel is fixedly attached to the inner wall of the outer shell on all sides, a through hole is provided in the middle of the flow limiting funnel, and the shielding cloth is attached to the lower side of the through hole.

[0008] Furthermore, the through hole in the middle of the flow limiting funnel is a circular through hole with a diameter of 50 mm, and a conical supporting surface is provided on the inner wall of the shell, and the edge of the flow limiting funnel is supported on the conical supporting surface.

[0009] Furthermore, an operating port is provided on the shell, and a shielding door is connected to the operating port via a door shaft. The shielding door can be rotated along the door shaft to open or close, and a door lock is provided between the shielding door and the shell.

[0010] Furthermore, the shell is made of transparent material, the abrasive is made of material with small particle size and high hardness, and the volume of the abrasive is one quarter of the volume of the flow limiting funnel.

[0011] Furthermore, the abrasive is gravel or quartz sand.

[0012] A method for accelerating crack damage of a compressor blade, using one of the above-mentioned devices for accelerating crack damage of a compressor blade, is characterized by comprising the following steps:

[0013] Step 1: Open the top cover, pour a certain amount of abrasive into the device and close the top cover to ensure the sealing of the entire device;

[0014] Step 2: Adjust the flow control device so that the flow rate of the abrasive in the device reaches the set value;

[0015] Step 3: Run the compressor to circulate the abrasive in the device, observe the flow of the abrasive in the flow limiting funnel and the gathering funnel, and repeat step 1 to add the abrasive according to the remaining amount of the abrasive;

[0016] Step 4: After running continuously for a period of time, turn on the compressor and observe the crack damage of the compressor blades;

[0017] Step 5: Repeat steps 1-4 until the compressor blade crack damage meets the requirements.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. A compressor blade crack damage acceleration device provided by the present invention simulates the compressor blade crack damage formation process by circulating abrasives in the compressor and the compressor blade crack damage acceleration device, thereby forming real blade crack damage. 2. By adjusting the flow rate and speed of the abrasive to control the degree of blade crack damage, compared with the traditional manually processed compressor blade crack damage, real compressor blades with different crack damage can be obtained, which improves the speed of blade crack damage formation. 3. Based on the analysis of the relationship between the abrasive flow rate and the size of the open aperture of the flow limiting funnel, the present invention provides a flow control device, which controls the size of the bottom of the flow limiting funnel closed by the shielding cloth by adjusting the displacement of the adjusting wheel on the slide rail, thereby adjusting the abrasive flow rate and realizing accurate control of different crack damage degrees of the compressor blades. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of an embodiment of a crack damage acceleration device for a compressor blade according to the present invention;

[0020] Figure 2 A three-dimensional diagram of the internal structure of a housing of an embodiment of a compressor blade crack damage acceleration device of the present invention;

[0021] Figure 3 It is a front view of the internal structure of the housing of an embodiment of the compressor blade crack damage acceleration device of the present invention;

[0022] Figure 4 It is a schematic structural diagram of a flow control device of an embodiment of a compressor blade crack damage acceleration device of the present invention;

[0023] Figure 5 It is a schematic structural diagram of the shielding door portion of an embodiment of the compressor blade crack damage acceleration device of the present invention;

[0024] Figure 6 This is a relationship diagram between the abrasive flow rate and the adjustment wheel position of an embodiment of the compressor blade crack damage acceleration device of the present invention.

[0025] Wherein: 1-compressor, 2-inlet pipe, 3-outlet pipe, 4-top cover, 5-housing, 6-flow limiting funnel, 7-gathering funnel, 8-flow control device, 9-inlet connecting pipe, 10-abrasive, 51-shielding door, 52-door lock, 53-door shaft, 54-conical supporting surface, 55-operating port, 56-locking port, 61-through hole, 81-slide rail, 82-tightening wheel, 83-spring sheet, 84-tightening wheel shaft, 85-shielding cloth, 86-adjusting wheel. DETAILED DESCRIPTION

[0026] In order to deepen the understanding of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings. The embodiments are only used to explain the present invention and do not constitute a limitation on the protection scope of the present invention.

[0027] Figure 1-5 A specific implementation of a compressor blade crack damage acceleration device is shown, including a compressor 1, an air inlet pipe 2, an air outlet pipe 3, a top cover 4, an outer shell 5, a flow limiting funnel 6, a gathering funnel 7, a flow control device 8, an air inlet connecting pipe 9 and an abrasive 10.

[0028] The air inlet and outlet of the compressor 1 are connected to the air inlet pipe 2 and the air outlet pipe 3 respectively. The air inlet pipe 2 is installed at the bottom of the outer shell 5. The air outlet pipe 3 passes through the top cover 4 and is placed on the top of the outer shell 5. The top cover 4 is bolted to the outer shell 5. A flow limiting funnel 6 is provided in the middle position of the outer shell 5. The flow control device 8 adjusts the flow of the flow limiting funnel 6 through the abrasive 10. A gathering funnel 7 is provided at the bottom of the outer shell 5. The gathering funnel 7 is connected to the air inlet pipe 2 through an air inlet connecting pipe 9.

[0029] like Figure 4 As shown, the flow control device 8 includes a flow limiting funnel 6, a slide rail 81, a tightening wheel 82, a spring sheet 83, a tightening wheel shaft 84, a shielding cloth 85 and an adjusting wheel 86. The slide rail 81 is connected to the housing 5 by bolts. The slide rail 81 is provided with a slot. The adjusting wheel 86 moves in the slot of the slide rail 81. The adjusting wheel 86 is provided with a locking mechanism and can be fixed on the slide rail 81. The tightening wheel shaft 84 is installed on the housing 5 by bolts. The tightening wheel 82 can rotate around the tightening wheel shaft 84. A shielding cloth 85 is wrapped around the tightening wheel 82. The tightening wheel 82 is provided with a spring sheet 83. The spring sheet 83 can drive the tightening wheel 82 to wrap around and tighten the shielding cloth 85. The shielding cloth 85 can follow the adjusting wheel 86 to cover the bottom through hole 61 of the flow limiting funnel 6.

[0030] like Figure 5As shown, the outer shell 5 is provided with an operating port 55, a conical supporting surface 54, a shielding door 51, a door lock 52, a door shaft 53, and a lock port 56. The door shaft 53 is installed on the outer side of the outer shell 5. The shielding door 51 can rotate around the door shaft 53. The door lock 52 is installed on the outer side of the outer shell 5. The shielding door 51 is provided with a lock port 54. The door lock 52 can be fixed on the lock port 54. The shielding door 51 can completely cover the operating port 55. The operating port 55 can operate the flow control device 8.

[0031] like Figure 3 As shown, a circular through hole 61 with a diameter of 50 mm is provided on the lower side of the flow limiting funnel 6. The flow of the abrasive 10 can be adjusted by the flow control device 8. The top of the flow limiting funnel 6 is in full contact with the inner wall of the outer shell 5. The top of the flow limiting funnel 6 is high on all sides and low in the middle. The outer side of the flow limiting funnel 6 is in contact with the conical supporting surface 54. A circular hole is provided at the bottom of the gathering funnel 7. The diameter of the circular hole is twice the maximum diameter of the abrasive 10. The flow limiting funnel 6 is concentrically arranged with the gathering funnel 7, the air outlet pipe 3 and the air inlet connecting pipe 9.

[0032] Preferably, the abrasive 10 has small particles and high hardness, and the abrasive 10 can be gravel and quartz sand.

[0033] Preferably, the outer shell 5 is made of transparent material, and the top cover 4 is evenly provided with a plurality of air outlets.

[0034] The compressor blade crack damage acceleration method using the above embodiment includes the following steps:

[0035] Step 1: Open the top cover 4, pour a certain amount of abrasive 10 into the device, and then close the top cover 4 to ensure the sealing of the entire device;

[0036] Step 2: Adjust the flow control device 8, by moving the adjusting wheel 86, pull the shielding cloth 85 out from the tightening wheel 82, and cover the through hole 61 at the bottom of the flow limiting funnel 6 to block a part of the abrasive 10 from passing through the through hole 61, so that the flow of the abrasive 10 in the device reaches the set value;

[0037] Step 3: operate the compressor 1 to circulate the abrasive 10 in the device, observe the flow of the abrasive 10 in the flow limiting funnel 6 and the gathering funnel 7, and repeat step 1 to add the abrasive 10 according to the remaining amount of the abrasive 10;

[0038] Step 4: After running continuously for a period of time, turn on compressor 1 and observe the crack damage of the compressor blade;

[0039] Step 5: Repeat steps 1-4 until the compressor blade crack damage meets the requirements.

[0040] from Figure 6 It can be seen that as the regulating wheel 86 continues to move, the flow rate of the abrasive also changes accordingly.

[0041] The above specific implementation methods are only for illustrating the technical concept and structural features of the present invention, and the purpose is to enable relevant persons familiar with this technology to implement it. However, the above content does not limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should fall within the protection scope of the present invention.

Claims

1. A compressor blade crack damage acceleration device, characterized in that: The device comprises a housing (5), an air inlet pipe (2), an air outlet pipe (3), a top cover (4), a flow control device (8), a gathering funnel (7) and an abrasive (10), wherein the flow control device (8) and the gathering funnel (7) are arranged in the housing (5) in sequence from top to bottom, the top cover (4) is connected to the top of the housing (5), the air inlet pipe (2) is arranged at the bottom of the housing (5), one end of which is connected to the air outlet of the compressor (1) and the other end of which is connected to the bottom of the gathering funnel (7), the air outlet pipe (3) is arranged at the top of the housing (5), one end of which is connected to the air inlet of the compressor (1) and the other end of which is connected to the top cover (4), the abrasive (10) circulates in the device, the gathering funnel (7) is provided with a plurality of circular holes, and the flow control device (8) is capable of adjusting the circulation flow of the abrasive (10) in the entire device; The flow control device (8) comprises a flow limiting funnel (6), a slide rail (81), an adjusting wheel (86), a shielding cloth (85), a tightening wheel (82), a tightening wheel shaft (84) and a spring sheet (83); the slide rail (81) is horizontally fixed on the housing (5); the adjusting wheel (86) is capable of horizontally moving along a slot on the slide rail (81); the tightening wheel (82) is connected to the housing (5) via the tightening wheel shaft (84); One end of the shielding cloth (85) is connected to the adjusting wheel (86), and the other end is wound around the tightening wheel (82); the spring sheet (83) is arranged on the tightening wheel (82) and can drive the tightening wheel (82) to rotate and wind the shielding cloth (85); the four sides of the flow limiting funnel (6) are fixedly attached to the inner wall of the outer shell (5); a through hole (61) is provided in the middle of the flow limiting funnel (6), and the shielding cloth (85) is attached to the lower side of the through hole (61).

2. A compressor blade crack damage acceleration device according to claim 1, characterized in that: The through hole (61) in the middle of the flow limiting funnel (6) is a circular through hole with a diameter of 50 mm. A conical supporting surface (54) is provided on the inner wall of the outer shell (5), and the edge of the flow limiting funnel (6) is supported on the conical supporting surface (54).

3. A compressor blade crack damage acceleration device according to claim 2, characterized in that: The housing (5) is provided with an operating port (55), the operating port (55) is connected to a shielding door (51) via a door shaft (53), the shielding door (51) can be opened or closed by rotating along the door shaft (53), and a door lock (52) is provided between the shielding door (51) and the housing (5).

4. The compressor blade crack damage acceleration device according to claim 1, characterized in that: The shell (5) is made of a transparent material, the abrasive (10) is made of a material with a small particle size and high hardness, and the volume of the abrasive (10) is one quarter of the volume of the flow limiting funnel (6).

5. A compressor blade crack damage acceleration device according to claim 4, characterized in that: The abrasive (10) is gravel or quartz sand.

6. A method for accelerating crack damage of a compressor blade, using the compressor blade crack damage acceleration device according to any one of claims 1 to 5, characterized in that: The steps include: Step 1: Open the top cover (4), pour a certain amount of abrasive (10) into the device, and then close the top cover (4) to ensure the sealing of the entire device; Step 2: adjusting the flow control device (8) so that the flow rate of the abrasive (10) in the device reaches a set value; Step 3: operating the compressor (1) to allow the abrasive (10) to circulate in the device, observing the flow of the abrasive (10) in the flow limiting funnel (6) and the gathering funnel (7), and repeating step 1 to add the abrasive (10) according to the remaining amount of the abrasive (10); Step 4: After running for a period of time, turn on the compressor (1) and observe the crack damage of the compressor blades; Step 5: Repeat steps 1-4 until the compressor blade crack damage meets the requirements.

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