Force application device and method for coloring inspection of bevel gears

Abstract

The force application device for the coloring inspection of bevel gears of the present invention is in the field of gear coloring mark inspection, and solves the technical problem of relatively low detection efficiency of bevel gears in the prior art. It is applicable to the meshing performance inspection of the gears in the transmission gearbox of a gas turbine. The transmission gearbox includes a pair of bevel gears and a driven gear shaft, and includes a spline adapter, a shoulder hexagon nut, a central shaft, a fixed base plate and a friction assembly. The transmission gearbox is used as a power output to drive the rotation of the driven gear shaft, transmit the power to the central shaft and drive its rotation. When the central shaft rotates, the shoulder hexagon nut is rotated to drive the friction assembly to generate different magnitudes of frictional forces on the central shaft, increase the torque of the driven gear shaft, and perform performance inspection on the pair of bevel gears. The present invention is used to improve the efficiency of bevel gear detection.

Description

Technical Field

[0001] The present invention belongs to the field of gear coloring mark inspection, and particularly relates to a force application device and method for bevel gear coloring inspection. Background Art

[0002] With the rapid development of domestic gas turbine technology, the structural design of each component is becoming more and more complex at the present stage, and the requirements for machining and assembly accuracy are getting higher and higher. Among them, the transmission gearbox in the gas turbine has an extremely high rotational speed. Therefore, it is necessary to perform coloring mark inspection during the assembly of the bevel gears in the transmission gearbox. In the past coloring mark inspection, it was necessary to apply a coloring agent on the driving gear shaft, rotate it several times in both forward and reverse directions after assembly, and then disassemble and inspect the contact surface of the imprint on the driven gear. Only when the contact imprint is adjusted to be qualified can it be used normally.

[0003] However, when rotating the driving gear shaft for coloring mark inspection, since the driven gear can rotate freely, its contact imprint cannot well and truly reflect on each tooth surface of the driven gear, and the clarity is not high, making it more difficult to measure the distances from the imprint to positions such as the tooth top, tooth root, concave surface, and convex surface. Therefore, it will cause adverse factors to the transmission gearbox and have an adverse impact on the stability of the whole machine.

[0004] In view of this, the present invention is specifically proposed. Summary of the Invention

[0005] The purpose of the present invention is to provide a force application device for bevel gear coloring inspection, which at least solves the technical problem of low detection efficiency of bevel gears in the prior art. There are many technical beneficial effects in the technical solution of this case, as introduced below:

[0006] Provide a force application device for bevel gear coloring inspection, which is applicable to the meshing performance detection of gears in the transmission gearbox of a gas turbine. The transmission gearbox includes a pair of bevel gears and a driven gear shaft, and includes a spline adapter, a shoulder hexagon nut, a central shaft, a fixed base plate, and a friction assembly. One end of the central shaft is rotatably connected to the shoulder hexagon nut, and the other end sequentially passes through the friction assembly and the fixed base plate, and is installed with the spline adapter, and is fixed to the driven gear shaft through the spline adapter; the fixed base plate supports the friction assembly, wherein:

[0007] The transmission gearbox serves as a power output to drive the rotation of the driven gear shaft, transmits to the central shaft and drives its rotation, and when the central shaft rotates, rotates the shoulder hexagon nut to drive the friction assembly to generate different magnitudes of frictional forces on the central shaft, increasing the torque of the driven gear shaft, and performing performance detection on the pair of bevel gears.

[0008] Compared with the prior art, the technical solution provided by the present invention includes the following beneficial effects:

[0009] By using the device of the present invention, the torque of the central shaft is adjusted through the friction assembly, causing the torque of the driven gear shaft to change, and finally achieving the detection of the bevel gear performance. It is a force-applying device for solving the problem of checking the imprint during the meshing process of a pair of bevel gears in a gas turbine transmission gearbox. It can make the imprint contact surface of this pair of gears closer to the contact area in the working state, further improving the working stability of the gears. Secondly, it can make the colored imprint for imprint inspection clearer, and the position boundaries from the tooth tip, tooth root and other parts are easy to measure. It has adjustable pressure, high positioning accuracy, good reliability, high efficiency and convenient operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0011] Figure 1 It is a schematic diagram of the force-applying device of the present invention;

[0012] Figure 2 It is a schematic diagram of the automatic control of the force-applying device of the present invention;

[0013] Wherein:

[0014] 1. Spline adapter; 2. Fixed base plate; 3. Lower friction plate mounting seat; 4. Thrust bearing; 5. Friction plate; 6. Upper friction plate mounting seat; 7. Lower spring retainer; 8. Rectangular spring; 9. Upper spring retainer; 10. Shoulder hex nut; 11. Central shaft; 30. Transmission gearbox; 31. Bevel gear; 32. Driven gear shaft; 40. Torque meter. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0015] The following specific examples illustrate the embodiments of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. The present invention can also be implemented or applied through other different specific embodiments. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the scope of protection of the present invention.

[0016] It should be noted that the following description relates to various aspects of embodiments within the scope of the appended claims. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is illustrative only. Based on the present invention, those skilled in the art should understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects described herein can be used to implement an apparatus and / or practice a method. Additionally, this apparatus and / or this method can be implemented using other structures and / or functionality in addition to one or more of the aspects described herein.

[0017] As Figure 1 The force - applying device for the coloring inspection of the bevel gear 31 shown in the figure is applicable to the meshing performance detection of the gears in the transmission gearbox 30 of a gas turbine. The transmission gearbox 30 includes a pair of bevel gears 31 and a driven gear shaft 32, and comprises a spline adapter 1, a shoulder hexagon nut 10, a central shaft 11, a fixed base plate 2 and a friction assembly. One end of the central shaft 11 is rotatably connected with the shoulder hexagon nut 10, and the other end sequentially passes through the friction assembly and the fixed base plate 2 and is installed with the spline adapter 1, and is fixed to the driven gear shaft 32 through the spline adapter 1; the fixed base plate 2 supports the friction assembly, wherein:

[0018] The transmission gearbox 30 serves as a power output to drive the driven gear shaft 32 to rotate, transmits to the central shaft 11 and drives it to rotate. When the central shaft 11 rotates, the shoulder hexagon nut 10 is rotated to drive the friction assembly to generate different magnitudes of frictional forces on the central shaft 11, increasing the torque of the driven gear shaft 32, and performing performance detection on this pair of bevel gears 31.

[0019] Working principle: When the driving gear shaft is under the action of the frictional force applied by the driven gear shaft 32, during rotation, the contact imprints of this pair of gears in an approximate working state can be clearly reflected on each tooth surface of the driven gear shaft 32. At the same time, by the way of taking the coloring imprints, the imprints are directly fed back to the quality inspection record sheet. It improves the authenticity and clarity of the gear coloring imprints, increases the working stability of the gear components, extends their service life, and at the same time conveniently and quickly improves the dimensional accuracy of the entire transmission gearbox 30 assembly, making its performance more reliable. Specifically:

[0020] As Figure 2As shown, it further includes a controller, a torque meter, and a rotating device. Preferably, the controller is connected to a display screen to display the adjusted torque. Among them, the torque meter is installed on the moving gearbox and is communicatively connected to the controller to monitor the torque or torque parameters of the driven gear shaft 32 in real time. The rotating device is connected to the shoulder hexagon nut 10. The controller controls the rotating device to rotate the shoulder hexagon nut 10 by an angle according to the torque or torque parameters, thereby controlling the magnitude of the frictional force generated by the friction assembly, and storing the feedback information of the torque meter in real time. It replaces the manual detection method in an automated manner, with high detection accuracy, and the torque can be adjusted according to subjective consciousness. The rotating device mentioned above is a hydraulic or pneumatic rotating handle or robotic arm, and it can be rotated, which will not be elaborated here.

[0021] As a specific implementation provided in this case, the friction assembly includes a rectangular spring 8, an upper spring retaining ring 9, a lower spring retaining ring 7, a first friction plate 5, and a second friction plate 5. The rectangular spring 8 is resisted between the upper spring retaining ring 9 and the lower spring retaining ring 7, and the top surface of the upper spring retaining ring 9 contacts the shoulder hexagon nut 10, and the bottom surface of the lower spring retaining ring 7 contacts the top surface of the fixed base plate 2;

[0022] The central shaft 11 sequentially passes through the rectangular spring 8, the upper spring retaining ring 9, the lower spring retaining ring 7, the first friction plate 5, and the second friction plate 5;

[0023] The first friction plate 5 is placed above the second friction plate 5, and the first friction plate 5 is fixed to the central shaft 11, and the second friction plate 5 is fixedly connected to the fixed base plate 2;

[0024] Rotating the shoulder hexagon nut 10 causes the rectangular spring 8 to be compressed, increasing the first friction plate 5 and the second friction plate 5, thereby increasing the torque of the central shaft 11.

[0025] Furthermore, the friction plate 5 is relatively brittle and needs to be protected. Therefore, the friction assembly further includes a lower friction plate 5 mounting seat 3 and an upper friction plate 5 mounting seat penetrated by the central shaft 11. Among them:

[0026] The first friction plate 5 is installed in the upper friction plate 5 mounting seat, and the second friction plate 5 is installed in the lower friction plate 5 mounting seat 3. The upper friction plate 5 mounting seat is connected to the central shaft 11 in a radially fixed and axially relatively movable manner. For example, in a key connection method, the central shaft 11 is provided with a keyway, and the upper friction plate 5 mounting seat is provided with a key, and the size of the keyway is larger than the size of the key, for radial or circumferential limitation, circumferentially movable. When the rectangular spring 8 is compressed, the upper friction plate 5 mounting seat moves axially along the central shaft 11, causing the two friction plates 5 to come into closer contact and increasing the frictional force. The lower friction plate 5 mounting seat 3 is fixedly connected to the fixed base plate 2. Preferably, during installation, the first friction plate 5 and the second friction plate 5 are in contact in the initial state.

[0027] Furthermore, considering better contact between the two friction plates 5, the diameter of the lower friction plate 5 mounting seat 3 is smaller than or larger than that of the upper friction plate 5 mounting seat.

[0028] As a specific implementation provided in this case, it further includes a thrust bearing 4 for transmitting torque to the central shaft 11. The inner ring of the thrust bearing 4 is fixedly connected to the upper friction plate 5 mounting seat and the first friction plate 5 through a fixing member, and rotates with the rotation of the central shaft 11. Its outer circle is fixedly connected to the lower friction plate 5 mounting seat 3 and the second friction plate 5.

[0029] During detection, the controller controls the force of the rectangular spring to increase until it reaches the torque value requirement of the coloring marks on the two gear shafts and then stops. At the same time, after rotating several circles in both forward and reverse directions, the force application device and the driven gear shaft are disassembled, and it is checked whether the coloring marks meet the meshing requirements of the two gears. If not, the assembly needs to be repeated for coloring inspection until it is qualified.

[0030] Secondly, a method for checking the coloring of bevel gears is provided, which is applicable to the meshing performance detection of the gears in the transmission gearbox of a gas turbine. The transmission gearbox includes a pair of bevel gears and a driven gear shaft. The method includes:

[0031] Coloring a pair of the bevel gears and using some or all of the above-mentioned force application devices for testing;

[0032] After the test, it is detected by a probe whether the length or distance of the contact marks on a pair of the bevel gears reaches a predetermined value. If so, the bevel gears are qualified; if not, they are unqualified.

[0033] The above has introduced the product provided by the present invention in detail. Specific examples are used in this article to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the core idea of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the invention, several improvements and modifications can be made to the invention, and these improvements and modifications also fall within the protection scope of the invention claims.

Claims

1. A force - applying device for the coloring inspection of bevel gears, applicable to the meshing performance detection of gears in the transmission gearbox of a gas turbine. The transmission gearbox includes a pair of bevel gears and a driven gear shaft, and is characterized in that, It includes a spline adapter, a shoulder hexagon nut, a central shaft, a fixed base plate and a friction assembly. One end of the central shaft is rotatably connected to the shoulder hexagon nut, and the other end sequentially passes through the friction assembly and the fixed base plate, and is equipped with the spline adapter, and is fixed to the driven gear shaft through the spline adapter; the fixed base plate supports the friction assembly, where: The transmission gearbox serves as a power output to drive the driven gear shaft to rotate, transmits to the central shaft and drives it to rotate. When the central shaft rotates, the shoulder hexagon nut is rotated to drive the friction assembly to generate different magnitudes of frictional force on the central shaft, increasing the torque of the driven gear shaft, and performing performance detection on a pair of the bevel gears; The friction assembly includes a rectangular spring, an upper spring retainer, a lower spring retainer, a first friction plate and a second friction plate. The rectangular spring is resisted between the upper spring retainer and the lower spring retainer, and the top surface of the upper spring retainer contacts the shoulder hexagon nut, and the bottom surface of the lower spring retainer contacts the top surface of the fixed base plate; the central shaft sequentially passes through the rectangular spring, the upper spring retainer, the lower spring retainer, the first friction plate and the second friction plate; the first friction plate is placed above the second friction plate, and the first friction plate is fixed to the central shaft, and the second friction plate is fixedly connected to the fixed base plate; rotating the shoulder hexagon nut causes the rectangular spring to be compressed, increasing the first friction plate and the second friction plate, thereby realizing an increase in the torque of the central shaft.

2. The force - applying device according to claim 1, characterized in that, It further includes a controller, a torque meter and a rotating device, where; The torque meter is installed on the moving gearbox and is communicatively connected to the controller to monitor the torque or torque parameters of the driven gear shaft in real time; The rotating device is connected to the shoulder hexagon nut, and the controller controls the angle of rotation of the shoulder hexagon nut by the rotating device according to the torque or torque parameters, thereby controlling the magnitude of the frictional force generated by the friction assembly, and storing the feedback information of the torque meter in real time.

3. The force - applying device according to claim 2, characterized in that, The rotating device is a hydraulic or pneumatic rotary handle or robotic arm.

4. The force - applying device according to claim 3, characterized in that, The friction assembly further includes a lower friction plate mounting seat and an upper friction plate mounting seat penetrated by the central shaft, where: The first friction plate is installed in the upper friction plate mounting seat, the second friction plate is installed in the lower friction plate mounting seat, and the upper friction plate mounting seat is connected to the central shaft in a radially fixed and axially movable manner, and the lower friction plate mounting seat is fixedly connected to the fixed base plate.

5. The force - applying device according to claim 4, characterized in that, The diameter of the lower friction plate mounting seat is smaller than or larger than that of the upper friction plate mounting seat.

6. The force - applying device according to claim 5, characterized in that, It further includes a thrust bearing. The inner ring of the thrust bearing is fixedly connected to the upper friction plate mounting seat and the first friction plate through a fixing member, rotates with the rotation of the central shaft, and its outer circle is fixedly connected to the lower friction plate mounting seat and the second friction plate.

7. A method for the coloring inspection of bevel gears, applicable to the meshing performance detection of gears in the transmission gearbox of a gas turbine. The transmission gearbox includes a pair of bevel gears and a driven gear shaft, and is characterized in that, The method includes: Coloring a pair of the bevel gears and using the force applying device according to any one of claims 1 to 6 for testing; After the test, use a probe to detect whether the length or distance of the contact imprint on a pair of the bevel gears reaches a predetermined value. If so, the bevel gears are qualified; if not, they are unqualified.

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