A kind of V2500 engine ball bearing axial gap measuring instrument

Abstract

The utility model relates to mechanical measurement technical field especially relates to a kind of V2500 engine ball bearing axial clearance measuring instrument.The measuring instrument includes: support, upper limit position detection mechanism, lower limit position detection mechanism and bearing fixed support;Support is T hollow frame structure;Bearing fixed support is located at the left side of support;Upper limit position detection mechanism one end is located at the left side of support top, and the other end is located at the right side of support top, and upper limit position detection mechanism is used to detect the upper limit position of bearing inner ring;Lower limit position detection mechanism one end is located at the left side of support bottom, and extend into the bottom of bearing fixed support, and the other end is located at the right side of support top, and the lower limit position detection mechanism is used to detect the lower limit position of bearing inner ring.The utility model can realize simply and quickly accurately measure the axial clearance of ball bearing, improve the inspection quality and efficiency of ball bearing.

Description

Technical Field

[0001] This utility model relates to the field of mechanical measurement technology, and in particular to a V2500 engine ball bearing axial clearance measuring instrument. Background Technology

[0002] The V2500 engine is a widely used civil aviation engine worldwide. This engine has five main bearings to support the low-pressure and high-pressure rotors. Two of these are ball bearings, located at the front ends of the low-pressure and high-pressure rotors respectively, to bear the radial and axial loads of the rotors. Due to its long-term harsh operating conditions, the engine maintenance manual requires that the axial clearance of the bearings be measured during engine maintenance and compared with the range given in the manual. However, the manual only provides the measurement requirements and simple measurement methods, without specifying the necessary instruments and equipment as required for measuring other parts. Therefore, it is necessary to design and manufacture an instrument for measuring the axial clearance of the bearings based on the structural characteristics of the engine ball bearings and the requirements of the engine maintenance manual. Utility Model Content

[0003] This invention proposes a V2500 engine ball bearing axial clearance measuring instrument to solve the problem of not being able to easily and quickly measure the axial clearance of the bearing and ensure that the bearing condition meets the usage requirements.

[0004] According to the present invention, a V2500 engine ball bearing axial clearance measuring instrument includes: a bracket, an upper limit position detection mechanism, a lower limit position detection mechanism, and a bearing fixing bracket;

[0005] The bracket is a T-shaped hollow frame structure;

[0006] The bearing mounting bracket is located on the left side of the bracket;

[0007] One end of the upper limit position detection mechanism is located on the top left side of the bracket, and the other end is located on the top right side of the bracket. The upper limit position detection mechanism is used to detect the upper limit position of the inner ring of the bearing.

[0008] One end of the lower limit position detection mechanism is located on the bottom left side of the bracket and extends into the bottom of the bearing fixing bracket, while the other end is located on the top right side of the bracket. The lower limit position detection mechanism is used to detect the lower limit position of the inner ring of the bearing.

[0009] Preferably, the bearing mounting bracket has a through hole at the top corresponding to the inner ring of the ball bearing.

[0010] Preferably, a plurality of bearing outer ring fixing claws are provided on the outside of the through hole, and the bearing outer ring fixing claws are used to fix the bearing outer ring.

[0011] Preferably, the bearing outer ring retaining claw is made of high-strength metal material.

[0012] Preferably, the upper limit position detection mechanism includes: a forward pulley block, a bearing inner ring fixing hanger, and a weight load;

[0013] The forward pulley block is installed on the top of the bracket, with the left end connected to the bearing inner ring fixing hanger and the right end connected to the weight load.

[0014] Preferably, the lower limit position detection mechanism includes: a reverse pulley block, a bearing inner ring fixing hanger, and a weight load;

[0015] The left end of the reverse pulley block is connected to the bearing inner ring fixing hanger, and the right end is connected to the weight load.

[0016] Preferably, a weight-bearing lifting platform is provided on the right side of the bracket;

[0017] The weight load is mounted on the weight load lifting platform.

[0018] Preferably, the weight load is a standard weight.

[0019] This utility model has at least the following beneficial effects:

[0020] This invention proposes an axial clearance measuring instrument for V2500 engine ball bearings. The inner and outer rings of the bearing are fixed by a left-side bearing mounting bracket. An upper limit detection mechanism and a lower limit detection mechanism pull the inner ring to its respective upper or lower limit position. This structure allows for simple and quick measurement of the bearing's axial clearance while meeting the requirements of the engine maintenance manual, ensuring the bearing meets operational requirements, improving the level of engine component inspection, and guaranteeing the safe operation of civil aviation engines. Attached Figure Description

[0021] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the present invention and, together with the specification, serve to explain the technical solutions of the present invention.

[0022] Figure 1 This is a schematic diagram of the structure of a V2500 engine ball bearing axial clearance measuring instrument according to the present invention;

[0023] Figure 2 This is a cross-sectional view of the present invention;

[0024] In the diagram, 1-support, 2-forward pulley block, 3-weight load, 4-weight load lifting platform, 5-bearing fixing bracket, 6-bearing outer ring fixing claw, 7-bearing inner ring fixing hanger, 8-reverse pulley block. Detailed Implementation

[0025] Various exemplary embodiments, features, and aspects of the present invention will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.

[0026] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0027] In this document, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A alone, A and B simultaneously, and B alone. Furthermore, the term "at least one" in this document means any combination of at least two of any one or more elements. For example, including at least one of A, B, and C can mean including any one or more elements selected from the set consisting of A, B, and C.

[0028] Furthermore, to better illustrate this utility model, numerous specific details are provided in the following detailed embodiments. Those skilled in the art should understand that this utility model can be implemented without certain specific details. In some instances, methods, means, components, and circuits well-known to those skilled in the art have not been described in detail in order to highlight the main points of this utility model.

[0029] Figure 1 This is a schematic diagram of the structure of a V2500 engine ball bearing axial clearance measuring instrument according to the present invention; Figure 2 This is a cross-sectional view of the present invention; as shown. Figure 1-2 As shown, a V2500 engine ball bearing axial clearance measuring instrument includes: a bracket 1, an upper limit position detection mechanism, a lower limit position detection mechanism, and a bearing fixing bracket 5;

[0030] The bracket 1 is a T-shaped hollow frame structure;

[0031] The bearing fixing bracket 5 is located on the left side of the bracket 1;

[0032] One end of the upper limit position detection mechanism is located on the top left side of the bracket 1, and the other end is located on the top right side of the bracket 1. The upper limit position detection mechanism is used to detect the upper limit position of the inner ring of the bearing.

[0033] One end of the lower limit position detection mechanism is located on the bottom left side of the bracket and extends into the bottom of the bearing fixing bracket 5, and the other end is located on the top right side of the bracket 1. The lower limit position detection mechanism is used to detect the lower limit position of the inner ring of the bearing.

[0034] In this embodiment of the invention, when the upper limit position is detected, the ball bearing to be tested is fixed on the bearing fixing bracket 5. The left end of the upper limit position detection mechanism is connected to the bottom of the inner ring of the ball bearing to be tested. A downward force is applied by the right end of the upper limit position detection mechanism, which generates an upward pulling force on the left end of the upper limit position detection mechanism, causing the inner ring of the ball bearing to be tested to move upward until it reaches a stable state. At this time, the inner ring of the ball bearing to be tested reaches the upper limit position. The height difference H1 between the upper limit position and the top of the outer ring of the bearing is measured and recorded using a micrometer that meets the accuracy requirements.

[0035] When testing the lower limit position, the ball bearing to be tested is fixed on the bearing fixing bracket 5. The left end of the lower limit position detection mechanism is connected to the top of the inner ring of the ball bearing to be tested. A downward force is applied through the right end of the lower limit position detection mechanism, which generates a downward pulling force on the left end of the lower limit position detection mechanism, causing the inner ring of the ball bearing to be tested to move downward until it reaches a stable state. At this time, the inner ring of the ball bearing to be tested reaches the lower limit position. The height difference H2 between the lower limit position and the bottom of the outer ring of the bearing is measured and recorded using a micrometer that meets the accuracy requirements.

[0036] After the measurement is completed, remove the ball bearing from the bearing mounting bracket 3 and calculate the axial clearance of the ball bearing to be measured based on the measured value.

[0037] The formula for calculating the axial clearance of the ball bearing to be tested includes: Axial clearance of ball bearing = height difference between the upper limit position and the top of the outer ring of the bearing + height difference between the lower limit position and the bottom of the outer ring of the bearing, i.e., H = H1 + H2.

[0038] In this invention, the bearing fixing bracket 5 has a through hole at its top corresponding to the inner ring of the ball bearing.

[0039] In this embodiment of the utility model, a circular through hole is opened at the top of the bearing outer ring fixing claw 6, which corresponds to the inner ring of the ball bearing to be tested, so as to ensure that the left end of the forward pulley group and the reverse pulley group can be fixed at the upper and / or lower part of the through hole.

[0040] In this utility model, a plurality of bearing outer ring fixing claws 6 are provided on the outside of the through hole, and the bearing outer ring fixing claws 6 are used to fix the bearing outer ring.

[0041] In this embodiment of the utility model, four bearing outer ring fixing claws 6 are evenly arranged on the outside of the through hole.

[0042] When the ball bearing is installed on the bearing mounting bracket 5, the outer ring of the ball bearing is fixed and limited by four bearing outer ring fixing claws 6.

[0043] In this invention, the bearing outer ring fixing claw 6 is made of high-strength metal material.

[0044] The bearing outer ring retaining claw 6 is made of A3 steel. The yield strength of A3 steel is 235MPa, which can meet the stress requirements of most non-critical structural components.

[0045] A3 steel has a relatively high elongation, which means it is not prone to sudden fracture when subjected to stress and deformation, can absorb a certain amount of energy, and has good safety. It has a low carbon content, so it is not easy to produce hardened structures and cracks during welding, the welding process is simple, and the welded joints are of high quality.

[0046] Furthermore, A3 steel has fewer alloying elements, mature production technology, large output, and a very low price, thus saving costs.

[0047] In this utility model, the upper limit position detection mechanism includes: a forward pulley block 2, a bearing inner ring fixing hanger 7, and a weight load 3;

[0048] The forward pulley block 2 is installed on the top of the bracket 1, with the left end connected to the bearing inner ring fixing hanger 7 and the right end connected to the weight load 3.

[0049] In the embodiments of this utility model, such as Figure 2 As shown, the forward pulley block 2 is located at the top of the bracket 1. The left end of the forward pulley block 2 is connected to the bearing inner ring fixing device 7 through a connecting ring, and the right end is connected to the weight load 3 through a fixing ring.

[0050] When testing the upper limit position, after fixing the ball bearing to be tested on the bearing bracket 5, the bearing inner ring fixing hanger 7 is placed at the bottom of the ball bearing inner ring. The top connecting ring of the bearing inner ring fixing hanger 7 passes through the through hole of the bearing bracket 5 and the ball bearing inner ring and connects to the left end of the forward pulley block 2. The right end of the forward pulley block 2 is connected to the weight load 3. The weight load 3 exerts an upward pulling force on the left end of the forward pulley block 2 through downward gravity, pulling the bearing inner ring fixing hanger 7. The inner ring fixing hanger 7 drives the ball bearing inner ring to be tested to move upward until the weight load 3 remains stable. At this point, the ball bearing inner ring to be tested reaches the upper limit position, and the measurement is performed and recorded.

[0051] In this utility model, the lower limit position detection mechanism includes: a reverse pulley block 2, a bearing inner ring fixing hanger 7, and a weight load 3;

[0052] The left end of the reverse pulley block 2 is connected to the bearing inner ring fixing hanger 7, and the right end is connected to the weight load 3.

[0053] In the embodiments of this utility model, such as Figure 2As shown, when testing the lower limit position, after fixing the ball bearing to be tested on the bearing mounting bracket 5, the bearing inner ring fixing hanger 7 is placed on top of the ball bearing inner ring. The top connecting ring of the bearing inner ring fixing hanger 7 passes through the through hole of the bearing mounting bracket 5 and the ball bearing inner ring and connects to the left end of the reverse pulley block 2. The right end of the reverse pulley block 2 is connected to the weight load 3. The weight load 3 generates a downward pulling force on the left end of the reverse pulley block 2 through downward gravity, pulling the bearing inner ring fixing hanger 7. The inner ring fixing hanger drives the ball bearing inner ring to move downward until the weight load 3 remains stable. At this point, the ball bearing inner ring to be tested reaches the lower limit position, and the measurement is performed and recorded.

[0054] In this utility model, a weight-bearing lifting platform 4 is provided on the right side of the bracket 1;

[0055] The weight load 3 is mounted on the weight load lifting platform 4.

[0056] In the embodiments of this utility model, such as Figure 1 As shown, during the test preparation phase, the weight load 3 is placed on the weight load lifting platform. After the ball bearings are connected, the weight load lifting platform is started to rise to an appropriate height, and then the weight load is connected to the forward pulley block or the reverse pulley block.

[0057] Slowly lower the weight load lifting platform 4 until the weight load 3 leaves the lifting platform 4 and remains stable, thus measuring the upper and lower limit positions.

[0058] When the load 3 shifts and falls, the load lifting platform 4 is used to reduce the distance the load 3 falls, avoid injury, and ensure the safety of the device.

[0059] In this invention, the weight load 3 is a standard weight.

[0060] In this embodiment of the invention, the standard weight refers to a physical measuring instrument with a known, stable, and highly accurate mass value. It is made of corrosion-resistant and stable materials, and has strict requirements regarding shape, size, and surface treatment. Its primary function is to serve as a reference for transferring mass values.

[0061] Compared to ordinary weights, standard weights have the following key characteristics:

[0062] Its actual quality value has a very small error compared to its nominal quality value, and this quality value remains stable over a long period of time and is not easily changed by the environment or use.

[0063] The mass value of each set of standard weights can be calibrated using a higher-precision standard weight and ultimately traced back to the international basic unit, the kilogram.

[0064] Using standard weights allows you to select the appropriate standard weight for different ball bearing part numbers. The standard weights range from 5 to 10 kg.

[0065] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical applications, or technical improvements to the embodiments in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A V2500 engine ball bearing axial clearance measuring instrument, characterized in that, include: Support (1), upper limit position detection mechanism, lower limit position detection mechanism and bearing fixing support (5); The bracket (1) is a T-shaped hollow frame structure; The bearing fixing bracket (5) is located on the left side of the bracket (1); One end of the upper limit position detection mechanism is located on the top left side of the bracket (1), and the other end is located on the top right side of the bracket (1). The upper limit position detection mechanism is used to detect the upper limit position of the inner ring of the bearing. One end of the lower limit position detection mechanism is located on the bottom left side of the bracket and extends into the bottom of the bearing fixing bracket (5), and the other end is located on the top right side of the bracket (1). The lower limit position detection mechanism is used to detect the lower limit position of the inner ring of the bearing.

2. The V2500 engine ball bearing axial clearance measuring instrument according to claim 1, characterized in that: The bearing fixing bracket (5) has a through hole at the top corresponding to the inner ring of the ball bearing.

3. The V2500 engine ball bearing axial clearance measuring instrument according to claim 2, characterized in that: Several bearing outer ring fixing claws (6) are provided on the outside of the through hole, and the bearing outer ring fixing claws (6) are used to fix the bearing outer ring.

4. The V2500 engine ball bearing axial clearance measuring instrument according to claim 3, characterized in that: The bearing outer ring fixing claw (6) is made of high-strength metal material.

5. The V2500 engine ball bearing axial clearance measuring instrument according to claim 1, characterized in that: The upper limit position detection mechanism includes: a forward pulley block (2), a bearing inner ring fixing hanger (7), and a weight load (3); The forward pulley block (2) is set on the top of the bracket (1), with the left end connected to the bearing inner ring fixing hanger (7) and the right end connected to the weight load (3).

6. The V2500 engine ball bearing axial clearance measuring instrument according to claim 1, characterized in that: The lower limit detection mechanism includes: a reverse pulley block (8), a bearing inner ring fixing hanger (7), and a weight load (3); The left end of the reverse pulley block (8) is connected to the bearing inner ring fixing hanger (7), and the right end is connected to the weight load (3).

7. The V2500 engine ball bearing axial clearance measuring instrument according to claim 4, characterized in that: A weight-bearing lifting platform (4) is installed on the right side of the bracket (1). The weight load (3) is set on the weight load lifting platform (4).

8. The V2500 engine ball bearing axial clearance measuring instrument according to claim 7, characterized in that, include: The weight load (3) is a standard weight.

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