Flaw detection device suitable for thin-wall bearing ring

Abstract

The utility model relates to a flaw detection device suitable for a thin-wall bearing ring, which comprises a flaw detection pool, a vertical cylindrical defoaming barrel is arranged on one side of the flaw detection pool, a liquid inlet connecting pipe is formed at the top of the defoaming barrel, and the liquid inlet connecting pipe is connected with the flaw detection pool through a conveying pipeline; a conical flow guide cap is inserted into the defoaming cylinder under the liquid inlet connecting pipe, a plurality of flow guide grooves are formed in the outer ring of the flow guide cap, a conical flow choking cover is fixedly inserted into the defoaming cylinder on the lower side of the flow guide cap, a communicating hole is formed in the middle of the flow choking cover, and a plurality of groups of columnar support frames are fixedly connected to the flow choking cover around the communicating hole; the upper end of the support frame is fixedly connected to the lower surface of the flow guide cap; a horizontal circular partition plate is inserted and fixed in the defoaming barrel on the lower side of the flow choking cover, and a plurality of flow dividing holes are formed in the outer ring of the partition plate. The flaw detection device is provided with a corresponding defoaming structure, so that the flaw detection of the ferrule is prevented from being influenced by a large amount of foam in the flaw detection pool.

Description

Technical fields:

[0001] This utility model relates to the technical field of flaw detection facilities, and more specifically to a flaw detection device suitable for thin-walled bearing rings. Background technology:

[0002] Rolling bearings are critical components of aero engines, bearings bear and transmit loads, and are also relatively fragile and prone to failure. Their operating condition directly affects the overall operation of the engine. Due to weight and structural space limitations, thin-walled bearings are currently widely used in aero engines. Thin-walled bearings also consist of rings, balls, and cages. Compared to conventional rolling bearings, the rings of aerospace-grade thin-walled bearings have thinner walls. Because of the thicker walls, damage to either the external or internal parts of the rings will affect the quality of the bearing. Therefore, the rings of thin-walled bearings need to undergo flaw detection. Currently, magnetic particle testing is generally used for flaw detection of thin-walled bearings.

[0003] During magnetic particle testing, the bearing ring needs to be immersed in the testing fluid, which is a magnetic suspension. During testing, the magnetic suspension is pumped from the water tank to immerse the bearing. After the test is completed, the magnetic suspension in the equipment's testing pool is returned to the water tank. When the magnetic suspension is transported to the testing pool, a large amount of foam is generated due to the impact of the testing fluid. At the same time, because the interval between testing is short, the foam cannot be allowed to settle and dissipate, thus affecting the testing of the bearing ring. Utility Model Content:

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a flaw detection device suitable for thin-walled bearing rings. The flaw detection device is equipped with a corresponding defoaming structure to prevent a large amount of foam from appearing in the flaw detection pool and affecting the flaw detection of the rings.

[0005] A flaw detection device for thin-walled bearing rings includes a flaw detection tank. A vertical cylindrical defoaming cylinder is provided on one side of the flaw detection tank. An inlet pipe is formed at the top of the defoaming cylinder, and the inlet pipe is connected to the flaw detection tank through a delivery pipeline. A conical flow guide cap is inserted into the defoaming cylinder directly below the inlet pipe. Several flow guide grooves are formed on the outer ring of the flow guide cap. A conical flow baffle is inserted and fixed in the defoaming cylinder below the flow guide cap. A connecting hole is formed in the middle of the flow baffle. Several sets of columnar support frames are fixed on the flow baffle around the connecting hole. The upper end of the support frame is fixed to the lower surface of the flow guide cap.

[0006] A horizontal circular baffle is inserted and fixed inside the defoaming cylinder on the lower side of the flow obstruction hood. The outer ring of the baffle is formed with several diversion holes. The bottom of the defoaming cylinder is formed with a liquid outlet hole, which is connected to the diversion holes. The side wall of the flaw detection tank is formed with a liquid inlet hole and a liquid inlet pipe connected to the liquid inlet hole is fixedly connected. The other end of the liquid inlet pipe is fixedly connected to the bottom of the defoaming cylinder and is connected to the liquid outlet hole.

[0007] Preferably, the inner diameter of the liquid inlet connector on the defoaming cylinder is not greater than the diameter of the liquid outlet hole;

[0008] A water pump, filter, and water storage tank are fixedly connected to the delivery pipeline between the liquid inlet connector and the flaw detection pool.

[0009] Preferably, the central axis of the defoaming cylinder, the central axis of the liquid inlet pipe, the central axis of the flow guide cap, the central axis of the flow baffle, and the central axis of the liquid outlet are all on the same straight line;

[0010] The flow guide grooves are evenly distributed in a ring around the central axis of the flow guide cap.

[0011] Preferably, the diameter of the outer ring of the guide cap is greater than the inner diameter of the liquid inlet connector, and the center distance from the inner end of the guide groove to the guide cap is greater than the inner diameter of the liquid inlet connector.

[0012] Preferably, the outer ring of the flow guide cap abuts against the inner wall of the defoaming cylinder.

[0013] Preferably, the distance from the inner end of the flow guide groove on the flow guide cap to the center of the flow guide cap is greater than the diameter of the connecting hole on the flow barrier.

[0014] Preferably, the support frame is provided in three sets, and the support frame is evenly distributed in a ring around the central axis of the flow barrier.

[0015] The support frame includes a support column fixed to the flow deflector, a vertical tube column sleeved on the upper end of the support column, and the upper end of the tube column fixed to the flow guide cap; vertical guide grooves are formed on the opposite tube wall of the tube column, and a horizontal pin is inserted and fixed to the top of the support column, with both ends of the pin inserted into the guide groove of the tube column respectively; a compression spring is inserted inside the tube column, with the upper end of the compression spring pressing against the flow guide cap and the lower end pressing against the support column.

[0016] The beneficial effects of this utility model are as follows:

[0017] This flaw detection device is equipped with a corresponding defoaming structure to prevent a large amount of foam from appearing in the flaw detection pool and affecting the flaw detection of the rings. Attached image description:

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a three-dimensional structural schematic diagram of a partial cross-section of the present invention;

[0020] Figure 3 This is a partial cross-sectional structural diagram of the defoaming cylinder of this utility model.

[0021] In the diagram: 1. Flaw detection tank; 11. Positioning hole; 2. Defoaming cylinder; 21. Liquid inlet pipe; 22. Liquid outlet; 3. Flow guide cap; 31. Flow guide groove; 4. Flow baffle; 41. Connecting hole; 5. Baffle plate; 51. Diverting hole; 6. Liquid inlet pipe; 7. Support frame; 71. Support column; 72. Pipe column; 721. Guide groove; 73. Pin shaft; 74. Compression spring. Detailed implementation method:

[0022] Example: See Figures 1 to 3 As shown, a flaw detection device suitable for thin-walled bearing rings includes a flaw detection pool 1. A vertical cylindrical defoaming cylinder 2 is provided on one side of the flaw detection pool 1. A liquid inlet pipe 21 is formed on the top of the defoaming cylinder 2. The liquid inlet pipe 21 is connected to the flaw detection pool 1 through a delivery pipeline. A conical flow guide cap 3 is inserted into the defoaming cylinder 2 directly below the liquid inlet pipe 21. The outer ring of the flow guide cap 3 is formed with several flow guide grooves 31. The width of the flow guide grooves 31 is 0.5 to 1 cm, which can prevent most of the air bubbles in the flaw detection liquid from passing through. A conical flow baffle 4 is inserted and fixed in the defoaming cylinder 2 below the flow guide cap 3. A connecting hole 41 is formed in the middle of the flow baffle 4. Several sets of columnar support frames 7 are fixed on the flow baffle 4 around the connecting hole 41. The upper end of the support frame 7 is fixed on the lower surface of the flow guide cap 3.

[0023] A horizontal circular partition 5 is inserted and fixed inside the defoaming cylinder 2 on the lower side of the flow obstruction hood 4. The outer ring of the partition 5 is formed with several diversion holes 51. The bottom of the defoaming cylinder 2 is formed with an outlet hole 22, which is connected to the diversion holes 51. The side wall of the flaw detection pool 1 is formed with an inlet hole 11 and is fixedly connected with an inlet pipe 6 connected to the inlet hole 11. The other end of the inlet pipe 6 is fixedly connected to the bottom of the defoaming cylinder 2 and is connected to the outlet hole 22. The inlet hole 11 is located at the lower part of the flaw detection pool 1.

[0024] The inlet pipe 6 is equipped with a solenoid valve. The solenoid valve is opened only when the flaw detection liquid entering the defoaming cylinder 2 submerges the flow barrier 4, thus preventing foam from flowing into the flaw detection pool along with the flaw detection liquid at the beginning of the flaw detection liquid delivery.

[0025] The inner diameter of the liquid inlet pipe 21 on the defoaming cylinder 2 is not greater than the diameter of the liquid outlet hole 22;

[0026] A water pump, a filter, and a water storage tank are fixedly connected on the conveying pipeline between the liquid inlet pipe 21 and the flaw detection pool 1. The flaw detection liquid in the flaw detection pool 1 needs to be filtered before entering the water storage tank. Then, the flaw detection liquid in the water storage tank is transported to the defoaming cylinder 2 by the water pump. The defoaming cylinder 2 eliminates air bubbles and flows into the flaw detection pool.

[0027] The central axis of the defoaming cylinder 2, the central axis of the liquid inlet pipe 21, the central axis of the flow guide cap 3, the central axis of the flow baffle 4, and the central axis of the liquid outlet 22 are all on the same straight line.

[0028] The flow guide grooves 31 are evenly distributed in a ring around the central axis of the flow guide cap 3.

[0029] The outer diameter of the guide cap 3 is greater than the inner diameter of the inlet pipe 21, and the center distance from the inner end of the guide groove 31 to the guide cap 3 is greater than the inner diameter of the inlet pipe 21. The inlet diameter of the flow into the defoaming cylinder 2 is not greater than the outlet diameter, so the flaw detection fluid will not accumulate in the defoaming cylinder 2.

[0030] The outer ring of the flow guide cap 3 abuts against the inner wall of the defoaming cylinder 2; the flaw detection fluid flows only through the flow guide groove 31 to the bottom of the defoaming cylinder 2.

[0031] The distance from the inner end of the flow guide groove 31 on the flow guide cap 3 to the center of the flow guide cap 3 is greater than the diameter of the connecting hole 41 on the flow obstruction cover 4.

[0032] The support frame 7 is provided in three sets, and the support frame 7 is evenly distributed in a ring around the central axis of the flow deflector 4;

[0033] The support frame 7 includes a support column 71 fixed to the flow deflector 4. A vertical tube column 72 is sleeved on the upper end of the support column 71, and the upper end of the tube column 72 is fixed to the flow guide cap 3. A vertical guide groove 721 is formed on the opposite tube wall of the tube column 72. A horizontal pin 73 is inserted and fixed to the top of the support column 71. The two ends of the pin 73 are respectively inserted into the guide groove 721 of the tube column 72. A compression spring 74 is inserted in the tube column 72. The upper end of the compression spring 74 presses against the flow guide cap 3 and the lower end presses against the support column 71. The compression spring 74 is provided in the support frame 7. The compression spring 74 can play a buffering role to realize the impact force of the flaw detection fluid falling on the flow guide cap 3.

[0034] Working principle: This structure is a flaw detection device suitable for thin-walled bearing rings. A defoaming cylinder 2 is provided on one side of the flaw detection pool 1. The flaw detection liquid enters the defoaming cylinder 2 through the liquid inlet pipe 21. The flaw detection liquid entering the defoaming cylinder 2 impacts the guide cap 3. Compared with impacting the flaw detection liquid in the flaw detection pool, it can reduce the generation of a large amount of foam and can flow down along the guide cap 3. It enters the middle and lower part of the defoaming cylinder 2 through the guide groove 31. Because the density of foam is less than that of flaw detection liquid, the foam floats on the top of the defoaming cylinder 2. At the same time, the guide groove 31 can also block some foam from flowing to the middle and lower part of the defoaming cylinder 2.

[0035] When a small portion of the foam flows into the middle and lower part of the defoaming cylinder 2, it will be blocked by the flow-blocking hood 4 and flow to the middle and upper part of the defoaming cylinder 2, that is, the middle part of the flow guide cap 3, while the flaw detection fluid flows into the flaw detection pool 1 through the connecting hole 41, the diversion hole 51 and the liquid outlet hole 22.

[0036] Meanwhile, the defoaming cylinder 2 and the flaw detection pool 1 are a communicating vessel structure. When the flaw detection is performed, the foam will remain in the defoaming cylinder 2. At the same time, the flaw detection fluid in the flaw detection pool 1 will also generate foam during the process of flowing back to the water storage tank. Therefore, the flaw detection fluid transported from the water storage tank to the flaw detection pool 1 itself carries foam, and the defoaming cylinder 2 can also eliminate the foam carried by the flaw detection fluid.

[0037] The embodiments described above are illustrative of the present invention and are not intended to limit the present invention. Any person skilled in the art can modify the embodiments without departing from the spirit and scope of the present invention; therefore, the scope of protection of the present invention should be as set forth in the claims.

Claims

1. A flaw detection device suitable for thin-walled bearing rings, comprising a flaw detection tank (1), a vertical cylindrical defoaming cylinder (2) provided on one side of the flaw detection tank (1), and a liquid inlet pipe (21) formed on the top of the defoaming cylinder (2), the liquid inlet pipe (21) being connected to the flaw detection tank (1) through a conveying pipeline; characterized in that: A conical guide cap (3) is inserted into the defoaming cylinder (2) directly below the liquid inlet pipe (21). The outer ring of the guide cap (3) is formed with several guide grooves (31). A conical baffle (4) is inserted and fixed in the defoaming cylinder (2) below the guide cap (3). A connecting hole (41) is formed in the middle of the baffle (4). Several sets of columnar support frames (7) are fixed on the baffle (4) around the connecting hole (41). The upper end of the support frame (7) is fixed on the lower surface of the guide cap (3). A horizontal circular partition (5) is inserted and fixed inside the defoaming cylinder (2) on the lower side of the flow-blocking hood (4). The outer ring of the partition (5) is formed with several diversion holes (51). The bottom of the defoaming cylinder (2) is formed with a liquid outlet hole (22), which is connected to the diversion hole (51). The side wall of the flaw detection pool (1) is formed with a liquid inlet hole (11) and a liquid inlet pipe (6) connected to the liquid inlet hole (11) is fixedly connected. The other end of the liquid inlet pipe (6) is fixedly connected to the bottom of the defoaming cylinder (2) and is connected to the liquid outlet hole (22).

2. The flaw detection device for thin-walled bearing rings according to claim 1, characterized in that: The inner diameter of the liquid inlet pipe (21) on the defoaming cylinder (2) is not greater than the diameter of the liquid outlet hole (22); A water pump, a filter, and a water storage tank are fixedly connected on the delivery pipeline between the liquid inlet pipe (21) and the flaw detection pool (1).

3. The flaw detection device for thin-walled bearing rings according to claim 1, characterized in that: The central axis of the defoaming cylinder (2), the central axis of the liquid inlet pipe (21), the central axis of the flow guide cap (3), the central axis of the flow baffle (4), and the central axis of the liquid outlet (22) are all on the same straight line; The flow guide grooves (31) are evenly distributed in a ring around the central axis of the flow guide cap (3).

4. The flaw detection device for thin-walled bearing rings according to claim 3, characterized in that: The outer diameter of the guide cap (3) is greater than the inner diameter of the inlet pipe (21), and the center distance from the inner end of the guide groove (31) to the guide cap (3) is greater than the inner diameter of the inlet pipe (21).

5. A flaw detection device suitable for thin-walled bearing rings according to claim 4, characterized in that: The outer ring of the flow guide cap (3) abuts against the inner wall of the defoaming cylinder (2).

6. A flaw detection device for thin-walled bearing rings according to claim 4, characterized in that: The distance from the inner end of the guide groove (31) on the guide cap (3) to the center of the guide cap (3) is greater than the diameter of the connecting hole (41) on the flow shield (4).

7. A flaw detection device suitable for thin-walled bearing rings according to claim 3, characterized in that: The support frame (7) is provided in three sets, and the support frame (7) is evenly distributed in a ring around the central axis of the flow deflector (4); The support frame (7) includes a support column (71) fixed to the flow deflector (4), a vertical tube column (72) is sleeved on the upper end of the support column (71), and the upper end of the tube column (72) is fixed to the flow guide cap (3); a vertical guide groove (721) is formed on the opposite tube wall of the tube column (72), and a horizontal pin (73) is inserted and fixed to the top of the support column (71), with the two ends of the pin (73) respectively inserted into the guide groove (721) of the tube column (72); a compression spring (74) is inserted in the tube column (72), with the upper end of the compression spring (74) pressing against the flow guide cap (3) and the lower end pressing against the support column (71).

Images