阅读说明：本技术 一种叶片榫头磁粉检测装置 (Blade tenon magnetic particle testing device ) 是由 毕波 陈龙 李凌 张集 周先火 刘素平 于 2020-04-30 设计创作，主要内容包括：本发明公开了一种叶片榫头磁粉检测装置,属于无损检测领域。一种叶片榫头磁粉检测装置,包括：检测台、第一磁芯、第二磁芯、第三磁芯以及磁化电源；第一磁芯设置在检测台的顶部；第二磁芯和第三磁芯均呈L型,并均包括支撑部和绕线部；支撑部与第一磁芯连接；绕线部呈悬置状态,绕线部缠绕有线圈,线圈的两端与磁化电源电性连接,绕线部设有磁轭极头,第二磁芯和第三磁芯的磁轭极头相向设置；第二磁芯的磁轭极头连接有延长块,延长块与第三磁芯的磁轭极头相向并间隔设置。本发明对退磁场具有抑制作用,在强磁场条件下,有效磁化场得到加强,叶片榫头的待检测面磁场均匀性得到提高,从而提高了检测精度,大大改善了检测效果。(The invention discloses a blade tenon magnetic powder detection device, which belongs to the field of nondestructive detection and comprises a detection table, a first magnetic core, a second magnetic core, a third magnetic core and a magnetizing power supply, wherein the first magnetic core is arranged at the top of the detection table, the second magnetic core and the third magnetic core are both in L shapes and respectively comprise a supporting part and a winding part, the supporting part is connected with the first magnetic core, the winding part is in a suspension state, a coil is wound on the winding part, two ends of the coil are electrically connected with the magnetizing power supply, the winding part is provided with a magnetic yoke polar head, the magnetic yoke polar heads of the second magnetic core and the third magnetic core are oppositely arranged, the magnetic yoke polar head of the second magnetic core is connected with an extension block, and the extension block and the magnetic yoke polar head of the third magnetic core are oppositely arranged at intervals.)

1. The utility model provides a blade tenon magnetic particle testing device which characterized in that includes: the magnetic detection device comprises a detection table (10), a first magnetic core (20), a second magnetic core (30), a third magnetic core (40) and a magnetization power supply (50);

the first magnetic core (20) is arranged at the top of the detection table (10);

the second magnetic core (30) and the third magnetic core (40) are both L-shaped and respectively comprise a supporting part (31) and a winding part (32), the supporting parts (31) of the second magnetic core (30) and the third magnetic core (40) are respectively connected with the first magnetic core (20), the winding part (32) is in a suspension state, coils (33) are respectively wound on the winding parts (32) of the second magnetic core (30) and the third magnetic core (40), two ends of each coil (33) are electrically connected with the magnetization power supply (50), the winding parts (32) are provided with magnetic yoke pole heads (34), and the magnetic yoke pole heads (34) of the second magnetic core (30) and the third magnetic core (40) are oppositely arranged;

the magnetic yoke pole head (34) of the second magnetic core (30) is connected with an extension block (35), and the extension block (35) and the magnetic yoke pole head (34) of the third magnetic core (40) are opposite and arranged at intervals.

2. The blade tenon magnetic powder inspection device according to claim 1, further comprising a holder block (60) placed on the first magnetic core (20); one side of the top surface of the support block (60) is in contact with the bottom surface of the extension block (35), and a gasket (70) is arranged on the other side of the top surface of the support block (60).

3. The blade tenon magnetic powder testing device according to claim 2, wherein the top of the support block (60) is provided with at least one pair of spaced fixture blocks (61), and the extension block (35) is positioned between the corresponding fixture blocks (61).

4. The blade tenon magnetic particle testing device according to claim 3, wherein a first supporting block (36) is provided at the bottom of the yoke pole head (34) of the second magnetic core (30), the extension block (35) is in contact with the yoke pole head (34) of the second magnetic core (30), and the extension block (35) is placed on top of the first supporting block (36).

5. The blade tenon magnetic powder testing device according to claim 4, wherein U-shaped limiting blocks (37) are respectively arranged on two sides of the extension block (35), the U-shaped groove clamps of the limiting blocks (37) are clamped with the first supporting block (36), and the limiting blocks (37) are both contacted with the extension block (35).

6. The blade tenon magnetic powder inspection device according to claim 5, wherein the bottom of the yoke pole head (34) of the third magnetic core (40) is provided with a second support block (38), and the top surface of the second support block (38) is flush with the top surface of the gasket (70).

7. The blade tenon magnetic powder inspection device according to claim 6, wherein the first magnetic core (20), the second magnetic core (30) and the third magnetic core (40) are made of a soft magnetic material; the extension block (35) is made of a high-magnetic-permeability material; the supporting block (60) and the limiting block (37) are made of austenitic stainless steel; the magnetic yoke pole head (34) is made of hard material; the coil (33) is a copper coil; the gasket (70) is made of rubber.

8. The blade tenon magnetic powder inspection device according to any one of claims 1 to 7, wherein the support portion (31) of the second magnetic core (30) is fixedly connected to the first magnetic core (20), and the support portion (31) of the third magnetic core (40) is in contact with the first magnetic core (20).

9. The blade tenon magnetic powder testing device according to claim 8, wherein a motor (80) is arranged on the testing table (10), and a motor shaft of the motor (80) is connected with the third magnetic core (40).

10. The blade tenon magnetic particle testing device of claim 9, wherein the height of the yoke pole head (34) and the extension block (35) is 200mm or more.

Technical Field

The invention relates to the technical field of nondestructive testing, in particular to a blade tenon magnetic powder testing device.

Background

The blade is a key part of an aeroengine and a gas turbine, the quality of the part quality plays a decisive role in the performance and the safety of the aeroengine and the gas turbine, the tenon part is used as an important bearing area of the blade and has strict requirements on the surface and near-surface quality, if the tenon part has defects, the blade is likely to fail and break, and the use of the aeroengine and the gas turbine is affected difficultly estimated.

The magnetic particle testing of current device to the blade tenon adopts manual fixed yoke equipment, and because the structure reason of blade tenon, the both ends of tenon will produce the magnetic pole when magnetic particle testing, and then produce the demagnetization field, the influence of demagnetization field leads to effective magnetization field to be more less strong, it is unsatisfactory to lead to the regional detection effect of tenon part, and partial blade tenon is longer, when tenon length exceedes the utmost point head scope, the detection effect is relatively poor, this very big whole detection quality of having influenced the blade, in addition manual clamping utmost point head detects time measuring to the tenon, the utmost point head needs round trip movement, detection efficiency is lower, part or equipment can be damaged to too big clamp force when the operation is careless.

Disclosure of Invention

The invention aims to provide a blade tenon magnetic powder detection device, which solves the problem that when the existing device is used for carrying out magnetic powder detection on a blade tenon, the detection effect is poor due to the existence of a demagnetizing field.

The technical scheme for solving the technical problems is as follows:

the utility model provides a blade tenon magnetic particle testing device, includes: the magnetic detection device comprises a detection table, a first magnetic core, a second magnetic core, a third magnetic core and a magnetizing power supply;

the first magnetic core is arranged at the top of the detection table;

the magnetic core comprises a first magnetic core, a second magnetic core, a third magnetic core, a first magnetic core, a second magnetic core and a third magnetic core, wherein the first magnetic core and the second magnetic core are both L-shaped and respectively comprise a supporting part and a winding part, the supporting parts of the second magnetic core and the third magnetic core are respectively connected with the first magnetic core, the winding part is in a suspension state, coils are respectively wound on the winding parts of the second magnetic core and the third magnetic core, two ends of each coil are electrically connected with a magnetizing power supply, the winding parts are provided with magnetic yoke polar heads, and the magnetic yoke polar;

the magnetic yoke pole head of the second magnetic core is connected with an extension block, and the extension block and the magnetic yoke pole head of the third magnetic core are opposite and arranged at intervals.

After the coil is electrified, a strong magnetic field is generated among the first magnetic core, the second magnetic core, the extension block and the third magnetic core, the direction of the magnetic field is the first magnetic core, the second magnetic core, the extension block, the third magnetic core and the first magnetic core or the direction of the magnetic field is opposite, the specific direction is based on the current direction in the coil, and when the blade tenon is arranged between the extension block and the third magnetic core, magnetic powder detection can be carried out on the blade tenon. The extension block prolongs the magnetization length of the surface to be detected (the bottom surface of the tenon) of the tenon, has an inhibiting effect on a demagnetizing field, and can strengthen an effective magnetizing field and improve the uniformity of the magnetic field of the surface to be detected of the blade tenon under the condition of a strong magnetic field, so that the detection precision is improved, the detection effect is greatly improved, and a more ideal detection effect can be obtained.

Because effective magnetic field is strengthened, need not contact between yoke polar head and the blade tenon and can accomplish magnetic particle testing for have the clearance between yoke polar head and the blade tenon, only carry out 90 rotations with the blade tenon in this clearance and can accomplish the detection of two directions, detection efficiency improves greatly and avoids the yoke polar head to damage device or part because press from both sides tightly.

Simultaneously, because the yoke polar head is directly arranged in on the laboratory bench to need not carry out the centre gripping like prior art to the blade tenon, the yoke polar head is bigger than the cross-section of polar head in prior art, and the detection area to the blade tenon each time increases for detection efficiency.

Further, the blade tenon magnetic powder detection device also comprises a support block arranged on the first magnetic core; one side of the top surface of the supporting block is contacted with the bottom surface of the extension block, and the other side of the top surface of the supporting block is provided with a gasket.

The support block has two functions, namely, the support block plays a role in supporting the extension block, and the spacer is arranged for placing the blade tenon. In the detection process, the blade tenon is placed on the gasket, so that the blade tenon is prevented from damaging or scratching parts when being placed or rotating.

Furthermore, at least one pair of spaced fixture blocks is arranged at the top of the support block, and the extension block is positioned between the corresponding fixture blocks.

The clamping blocks are used for limiting the two sides of the extension block and are fixed in a clamping mode between the clamping blocks.

Furthermore, the bottom of the magnetic yoke pole head of the second magnetic core is provided with a first supporting block, the extension block is contacted with the magnetic yoke pole head of the second magnetic core, and the extension block is arranged at the top of the first supporting block.

In order to avoid damaging the magnetic yoke pole head when the extension block is connected with the magnetic yoke pole head of the second magnetic core, in the embodiment, only contact is carried out between the extension block and the magnetic yoke pole head of the second magnetic core, and the extension block is supported and fixed by the first supporting block and the support block together.

Furthermore, the two sides of the extension block are respectively provided with a U-shaped limiting block, the U-shaped groove clamp of the limiting block is connected with the first supporting block in a clamped mode, and the limiting block is in contact with the extension block.

The limiting block is used for limiting and fixing the extension block at the contact position of the extension block and the magnetic yoke pole head of the second magnetic core.

Furthermore, a second supporting block is arranged at the bottom of the magnetic yoke pole head of the third magnetic core, and the top surface of the second supporting block is flush with the top surface of the gasket.

The second supporting block is used for supporting the part of the tenon extending out of the supporting block.

Furthermore, the first magnetic core, the second magnetic core and the third magnetic core are made of soft magnetic materials; the extension block is made of a high-magnetic-permeability material; the support block and the limiting block are made of austenitic stainless steel; the magnetic yoke pole head is made of hard material; the coil is a copper coil; the gasket is made of rubber.

Furthermore, the supporting portion of the second core is fixedly connected to the first core, and the supporting portion of the third core is in contact with the first core.

The third magnetic core can slide on the first magnetic core, so that the position between the magnetic yoke pole head of the third magnetic core and the extension block is adjusted, blade tenons of different specifications can be conveniently detected, and the blade tenons can be conveniently detected in different detection directions.

Furthermore, a motor is arranged on the detection table, and a motor shaft of the motor is connected with the third magnetic core.

Furthermore, the height of the magnetic yoke pole head and the extension block is more than or equal to 200 mm.

Because the length of the tenon of the blade to be manufactured is not more than 400mm at present, when the height of the magnetic yoke pole head and the extension block is more than or equal to 200mm, the detection in two directions can be completed by rotating 90 degrees when the tenon of the blade with the length of less than or equal to 200mm is detected, and when the tenon of the blade with the length of more than 200mm is detected, the tenon of the blade is sequentially rotated two 90 degrees along the same direction, the detection is performed once when the tenon of the blade is rotated 90 degrees once, the comprehensive detection of the tenon of the blade can be completed, when the tenon of the blade with the width of more than 200mm is detected, the detection is performed once when the tenon of the blade is rotated 90 degrees once along the same direction, and the comprehensive detection of the tenon of the blade can be completed, thereby improving the universality.

The invention has the following beneficial effects:

(1) according to the invention, the extension block is arranged, so that the magnetization length of the surface to be detected of the tenon is extended, the suppression effect on a demagnetizing field is achieved, an effective magnetization field is enhanced under the condition of a strong magnetic field, and the uniformity of the magnetic field of the surface to be detected of the blade tenon is improved, so that the detection precision is improved, the detection effect is greatly improved, and a more ideal detection effect can be obtained.

(2) The blade tenon is rotated by 90 degrees, so that the detection of the blade tenon in two directions can be finished, even if the blade tenon with a larger specification is rotated by two or three 90 degrees, the comprehensive detection can be finished, and the universality of the device is improved.

(3) The magnetic yoke pole head does not need to clamp the blade tenon, compared with the existing device, the comprehensive detection can be completed by quickly rotating a certain angle, the detection efficiency is greatly improved, meanwhile, the risk of damaging the device and parts when the pole head is clamped is avoided, and the blade tenon is prevented from being scratched or damaged due to sliding between the magnetic yoke pole head and the blade tenon.

Drawings

FIG. 1 is a schematic structural diagram of a blade tenon magnetic powder testing device of the invention;

FIG. 2 is a schematic view of the connection between the second core, the extension block and the bracket of the present invention;

FIG. 3 is a schematic view of the connection between the extension block and the pallet of the present invention;

FIG. 4 is a schematic diagram of a third core of the present invention;

fig. 5 and 6 are schematic diagrams of the blade tenon magnetic powder testing device of the invention when testing the blade tenon in two testing directions.

In the figure: 10-a detection table; 20-a first magnetic core; 30-a second magnetic core; 31-a support; 32-a winding portion; 33-a coil; 34-yoke pole head; 35-an extension block; 36-a first support block; 37-a limiting block; 38-a second support block; 40-a third magnetic core; 50-a magnetizing power supply; 60-a supporting block; 61-a fixture block; 70-a gasket; 80-a motor; 90-blade tenon.

Detailed Description

The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.