Rapid adjusting measuring tool for aero-engine bevel gear adjusting pad

Abstract

The utility model provides a rapid adjustment measuring tool for an aero-engine bevel gear adjusting pad, which is arranged in a jacking hole of a bearing seat and used for adjusting a gap between two pieces to be adjusted, and comprises a knob part, the outer surface of which is provided with scale marks; one end of the thread part is connected to the lower surface of the rotary knob part, the outer surface of the thread part is provided with an external thread, and the external thread is used for being matched with an internal thread in a jacking hole of the bearing seat; and the supporting spring abuts against the rotary knob part, and the supporting spring surrounds the periphery of the threaded part. The rapid adjustment measuring tool is simple and practical in structure, easy to operate and high in precision; a lot of working hours can be saved during use; the device can be used for adjusting impressions of different bevel gear gearboxes with similar structures and batch bevel gear gearboxes, and has universality; the process link of grinding the adjusting pad for multiple times can be omitted, and shaping can be achieved only through one-time grinding.

Description

Technical Field

[0001] The utility model relates to the technical field of bevel gear impression adjustment of an aero-engine transmission system, in particular to a quick adjustment measuring tool for a bevel gear adjustment pad of an aero-engine. Background Art

[0002] The transmission system of an aircraft engine is a gear transmission system that transmits the starter power to the engine and transmits the engine power to engine accessories and aircraft accessories according to certain speed and direction requirements.

[0003] When assembling the bevel gearbox of the aircraft engine transmission system, due to the existence of factors such as part processing error, assembly error, bearing clearance, etc., the design value of the bevel gear pair cannot directly obtain the qualified side clearance and mark of the bevel gear pair. This requires adjusting the mark position (including tooth clearance) of the arc tooth bevel gear by grinding the bevel gear adjustment pad thickness.

[0004] The traditional process of adjusting the impression is to assemble the gearbox, measure the gear side clearance and trace the gear impression, disassemble the gearbox, observe the gear impression position, and grind and adjust the pad thickness. This process is repeated and iterated until the qualified side clearance and impression position of the gear pair are obtained.

[0005] During the entire gear impression adjustment process, the grinding of the adjustment pad takes up the most man-hours and has many grinding inspection procedures, which is the difficulty of the entire gearbox assembly process. Although the gearbox has a special impression adjustment fixture during the impression adjustment process, which can provide the axial force in different directions required by the gear pair during rotation, measure the ring gear runout and the gear pair side clearance, it is unable to quickly and accurately determine the thickness of the adjustment pad.

[0006] In view of this, the inventor of the present application has designed a quick adjustment gauge for an aircraft engine bevel gear adjustment pad in order to overcome the above-mentioned technical problems. Utility Model Content

[0007] The technical problem to be solved by the utility model is to overcome the defects in the prior art that the grinding of the adjustment pad takes up the most working hours and has many grinding and inspection procedures during the gear impression adjustment process, and to provide a rapid adjustment gauge for the adjustment pad of an aircraft engine bevel gear.

[0008] The utility model solves the above technical problems through the following technical solutions:

[0009] The utility model provides a quick adjustment gauge for an aero-engine bevel gear adjustment pad, which is characterized in that the quick adjustment gauge is used to be arranged in a top hole of a bearing seat to adjust the gap between two parts to be adjusted, and the quick adjustment gauge comprises: a knob portion, the outer surface of which is provided with scale lines; a threaded portion, one end of which is connected to the lower surface of the knob portion, the outer surface of the threaded portion is provided with an external thread, and the external thread is used to cooperate with the internal thread in the top hole of the bearing seat; and a support spring, which is abutted against the knob portion and surrounds the outer circumference of the threaded portion.

[0010] According to one or more embodiments of the present invention, the upper surface of the knob portion has a hexagonal hole.

[0011] According to one or more embodiments of the present invention, an annular groove is provided on the lower surface of the knob portion.

[0012] According to one or more embodiments of the present invention, the end surface of the other end of the threaded portion is spherical.

[0013] According to one or more embodiments of the present invention, the number of the scale lines is 100, and the scale lines are evenly arranged on the outer surface of the knob portion.

[0014] According to one or more embodiments of the present invention, the gap change value between two to-be-adjusted parts corresponding to every two scale lines is 0.01 mm.

[0015] According to one or more embodiments of the present invention, the pitch of the external thread is 1 mm.

[0016] The positive and progressive effects of the utility model are:

[0017] The utility model of the aviation engine bevel gear adjustment pad quick adjustment measuring tool has at least the following advantages:

[0018] 1. The aviation engine bevel gear adjustment pad quick adjustment measuring tool of the utility model has a simple and practical structure, is easy to operate and has high precision.

[0019] Second, the quick adjustment measuring tool of the utility model can save a lot of working hours in the bevel gear impression adjustment link.

[0020] 3. The quick adjustment measuring tool of the utility model is universal and can be used in the impression adjustment of different bevel gear boxes with similar structures and batch bevel gear boxes.

[0021] Fourth, the quick adjustment measuring tool of the utility model can save the process of grinding the adjustment pad multiple times, and only needs one grinding to finalize the shape. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and other features, properties and advantages of the present invention will become more apparent through the following description in conjunction with the accompanying drawings and embodiments, in which the same reference numerals always represent the same features, wherein:

[0023] Figure 1a The utility model is a structural schematic diagram of an adjusting knob in a quick adjusting measuring tool for an aero-engine bevel gear adjusting pad.

[0024] Figure 1b The utility model is a cross-sectional schematic diagram of an adjusting knob in a quick adjusting measuring tool for an aero-engine bevel gear adjusting pad.

[0025] Figure 2 The utility model is a structural schematic diagram of a quick adjustment measuring tool for an aircraft engine bevel gear adjustment pad.

[0026] Figure 3 The utility model is a schematic diagram of an aero-engine bevel gear adjustment pad quick adjustment measuring tool arranged on a driving wheel bearing seat module.

[0027] Figure 4a The utility model is a side view schematic diagram of an aero-engine bevel gear adjustment pad quick adjustment measuring tool arranged on a driven wheel bearing seat module.

[0028] Figure 4b The utility model is a three-dimensional schematic diagram of an aero-engine bevel gear adjustment pad quick adjustment measuring tool arranged on a driven wheel bearing seat module.

[0029] Figure 5a The utility model is a schematic diagram of a quick adjustment measuring tool for adjusting a bevel gear adjustment pad of an aero-engine for use in quick adjustment and assembly of a gearbox impression.

[0030] Figure 5b yes Figure 5a Enlarged view of part A.

[0031] [Reference Signs]

[0032] Quick Adjust Gage 100

[0033] Knob portion 110

[0034] Tick ​​mark 111

[0035] Hexagon socket hole 112

[0036] Annular groove 113

[0037] Threaded portion 120

[0038] External thread 121

[0039] Support spring 130

[0040] Driving wheel bearing seat 210

[0041] Driven wheel bearing seat 220

[0042] Driving bevel gear 310

[0043] Driven bevel gear 320

[0044] Driving wheel bearing 410

[0045] Driven wheel bearing 420

[0046] Driving wheel bearing sleeve 430

[0047] Driven wheel bearing sleeve 440

[0048] Driving wheel locking nut 510

[0049] Driven wheel locking nut 520

[0050] Receiver 600

[0051] First adjustment unit D1

[0052] Second adjustment part D2

[0053] End face E DETAILED DESCRIPTION

[0054] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0055] Embodiments of the utility model will now be described in detail with reference to the accompanying drawings. Reference will now be made in detail to preferred embodiments of the utility model, examples of which are shown in the accompanying drawings. Wherever possible, the same reference numerals will be used in all drawings to represent the same or similar parts. In addition, although the terms used in the utility model are selected from well-known and commonly used terms, some of the terms mentioned in the utility model specification may be selected by the applicant at his or her discretion, and their detailed meanings are explained in the relevant parts of the description herein. In addition, it is required to understand the utility model not only by the actual terms used, but also by the meaning implied by each term.

[0056] As shown in Figure 1~ Figure 5b As shown, the utility model provides a quick adjustment gauge for adjusting the bevel gear of an aircraft engine. The quick adjustment gauge 100 is used to be set in the top hole of the bearing seat to adjust the gap between two parts to be adjusted. The quick adjustment gauge 100 includes:

[0057] A knob portion 110, wherein a scale line 111 is provided on an outer surface of the knob portion 110;

[0058] A threaded portion 120, one end of which is connected to the lower surface of the knob portion 110, and an outer surface of the threaded portion 120 has an external thread 121, and the external thread 121 is used to cooperate with the internal thread in the top hole of the bearing seat;

[0059] The support spring 130 is in contact with the knob portion 110 , and surrounds the outer circumference of the threaded portion 120 .

[0060] The knob portion 110 and the threaded portion 120 form an adjustment knob. Preferably, the diameter and height of the adjustment knob can be determined according to the reserved space of the driving wheel bearing seat 210 and the driven wheel bearing seat 220, and the specification of the threaded portion 120 matches the specification of the screw hole of the top hole. Preferably, when the pitch P of the top hole is 1mm, the tolerance grade of the thread is 4h6h, and the thread length of the threaded portion 120 is determined according to the thickness of the mounting edge of the bearing seat, and a gap of 4 to 6mm is maintained between the lower end face of the adjustment knob and the end face of the bearing seat.

[0061] The utility model discloses a quick adjustment measuring tool for an aircraft engine bevel gear adjustment pad, which can perform impression adjustment on a bevel gear pair of a gear box.

[0062] When in use, a quick adjustment gauge 100 is used to replace the adjustment pad for assembly. The quick adjustment gauge 100 is installed on the jacking bolt hole of the bearing seat that fixes the bevel gear. The adjustment gauge can be adjusted steplessly, which is equivalent to the stepless adjustment of the thickness of the adjustment pad, and then the gap at the installation position of the adjustment pad is controlled by fine-tuning the adjustment gauge.

[0063] During the mark adjustment process, different clearance values, i.e., different adjustment pad thicknesses are obtained by fine-tuning the gauge and using the scale on the gauge. When the final ideal bevel gear pair side clearance and mark are obtained, the scale on the adjustment gauge is recorded and then converted into the clearance value, which is the final thickness of the adjustment pad required. The adjustment pad can then be ground according to the final thickness value.

[0064] The utility model discloses a quick adjustment measuring tool for adjusting pads of aircraft engine bevel gears, which only needs to be sharpened once, thus eliminating the need for repeated sharpening of the adjusting pads and greatly improving the working efficiency of gearbox assembly.

[0065] like Figure 1b As shown, as a preferred embodiment of the aviation engine bevel gear adjustment pad quick adjustment gauge of the utility model, the upper surface of the knob part 110 has a hexagonal hole 112.

[0066] Due to the provision of the hexagonal hole 112 , the quick-adjustment measuring tool 100 of the utility model can be adjusted by means of a hexagonal wrench.

[0067] like Figure 1bAs shown, as a preferred embodiment of the aviation engine bevel gear adjustment pad quick adjustment measuring tool of the utility model, the lower surface of the knob part 110 is provided with an annular groove 113 .

[0068] When the support spring 130 abuts against the knob portion 110, the annular groove 113 can limit the support spring 130. The support spring 130 is limited in the spring annular groove 113, and the support spring 130 can also be freely taken out.

[0069] Preferably, the diameter, pitch, major diameter and length of the support spring 130 are selected according to the size of the annular groove 113 of the knob portion 110 and the major diameter specification of the external thread 121, and the elastic coefficient k value should be moderate to ensure that the support spring 130 has sufficient compression to provide radial preload when the quick adjustment gauge 100 is fine-tuned.

[0070] like Figure 1a to Figure 2 As shown, as a preferred embodiment of the utility model of the rapid adjustment measuring tool for the aircraft engine bevel gear adjustment pad, the end surface E at the other end of the threaded portion 120 is spherical in shape.

[0071] The spherical end surface E of the threaded portion 120 is used to abut against the part to be adjusted. The spherical end surface E can reduce the surface wear of the part to be adjusted and can compensate for slight deviations and unevenness during the installation process to a certain extent, and has a certain degree of self-adaptation.

[0072] Preferably, a small amount of lubricating oil is applied to the threaded section, spherical end surface E and both end surfaces of the support spring 130 of the quick adjustment gauge 100 so that the external thread 121 of the quick adjustment gauge 100 can be smoothly screwed in and out, reduce thread wear, and ensure adjustment accuracy. The lubricating oil grade is consistent with the lubricating oil grade required for gearbox assembly. The quick adjustment gauge 100 is assembled, that is, the support spring 130 is installed to the knob portion 110, and the cleanliness of the quick adjustment gauge 100 is maintained.

[0073] like Figure 1a to Figure 2 As shown, as a preferred embodiment of the utility model of the rapid adjustment measuring tool for the bevel gear adjustment pad of an aircraft engine, the number of scale lines 111 is 100, and the scale lines 111 are evenly arranged on the outer surface of the knob part 110.

[0074] like Figure 1a to Figure 2 As shown, as a preferred embodiment of the utility model of the rapid adjustment measuring tool for the bevel gear adjustment pad of an aircraft engine, the gap change value between the two parts to be adjusted corresponding to every two scale lines 111 is 0.01 mm.

[0075] A circle of uniform scale is engraved on the outer surface of the knob, the number of scale lines 111 is 100, and the gap change value corresponding to each scale is 1 / 100mm, i.e. 0.01mm, which is the adjustment accuracy;

[0076] like Figure 1a to Figure 2 As shown, as a preferred embodiment of the utility model of the rapid adjustment measuring tool for the aircraft engine bevel gear adjustment pad, the pitch of the external thread 121 is 1 mm.

[0077] The design method of the utility model of the rapid adjustment measuring tool for the bevel gear adjustment pad of an aero-engine is as follows:

[0078] First, use the screw hole of the top hole of the bearing seat (bevel gear mounting seat) on the gear box, and the adjustment knob with the threaded portion 120. The knob diameter and height can be determined according to the reserved space of the driving wheel bearing seat 210 and the driven wheel bearing seat 220. The specification of the threaded portion 120 matches the specification of the top hole screw hole. When the top hole pitch P = 1mm, the thread is selected to match with a small gap. The thread length of the threaded portion 120 is determined according to the thickness of the bearing seat mounting edge, and the gap between the lower end face of the adjustment knob and the end face of the bearing seat is maintained at 4 to 6mm.

[0079] A circle of uniform scale is engraved on the outer ring of the adjustment knob. The number of scale lines 111 is n. When the adjustment knob is fine-tuned by one scale, the gap change P / n at the position of the adjustment pad is the adjustment accuracy. When the number of scale lines 111 is 100, the gap change value corresponding to each scale is 1 / 100mm, that is, 0.01mm, which is also the adjustment accuracy.

[0080] Considering the accuracy of the support of the adjustment knob, the end surface shape of the threaded portion 120 is designed to be spherical, and the gap adjustment at the position of the adjustment pad is performed by relying on the point contact of the three adjustment knobs.

[0081] In order to make the quick adjustment gauge 100 have good stability during adjustment, a support spring 130 is added to ensure that the adjustment knob has sufficient friction at its thread when fine-tuning. The selection of the elastic coefficient k value of the support spring 130 is determined according to the axial force required by the quick adjustment gauge 100. If the k value is too large, it will increase the difficulty of manually adjusting the scale knob. If the k value is too small, it will cause micro-movement when touching the adjustment knob, affecting the accuracy.

[0082] In order to constrain the position of the support spring 130 to a certain extent, so as to ensure that the support spring 130 can provide a stable axial force to the adjustment knob during the fine adjustment of the adjustment knob of the quick adjustment gauge 100, so that the quick adjustment knob can be stabilized at any scale, an annular groove 113 is added to the adjustment knob to limit the support spring 130. At the same time, the axial force provided by the support spring 130 can also eliminate the gap of the thread, so as to ensure the accuracy of fine adjustment.

[0083] The diameter, pitch, major diameter and length of the support spring 130 are then selected, taking into full consideration the size of the annular groove 113 and the major diameter of the thread.

[0084] Finally, assemble the adjustment gauge, keep the gauge clean, and apply a small amount of lubricating oil to the threaded part 120 of the adjustment knob and the spherical end surface of the threaded part 120 so that the adjustment gauge thread can be smoothly screwed in and out, reduce thread wear, and ensure adjustment accuracy. The lubricating oil brand is consistent with the lubricating oil brand required for gearbox assembly.

[0085] The specific embodiment of the utility model of the aviation engine bevel gear adjustment pad quick adjustment measuring tool during use is as follows:

[0086] When using the aircraft engine bevel gear adjustment pad quick adjustment gauge of the utility model to adjust the impression, first install the active bevel gear 310 and the corresponding active wheel bearing 410, the active wheel bearing sleeve 430 and the active wheel locking nut 510 and the corresponding active wheel bearing seat 210 according to the gear box assembly technical requirements, and then screw three quick adjustment gauges 100 of the utility model into the three top holes of the active wheel bearing seat 210 (because three points determine a plane, at least three installation holes are required).

[0087] With the help of the corresponding casing 600 (gear box) or workbench, ensure that the fulcrum head of the quick-adjustment gauge 100 is flush with the installation plane of the bearing seat, and at the same time make a scale mark on the top hole of the bearing seat and the periphery of the adjustment gauge (the mark depth and width should not exceed 0.2mm, and the width of the scale line 111 will affect the accuracy if it is too wide), read the corresponding scale value on the quick-adjustment gauge 100 and record it, which is to adjust the quick-adjustment gauge 100 to zero.

[0088] The adjustment knob is rotated to adjust the clearance between the mounting edge of the driving wheel bearing seat 210 and the mounting surface on the worktable or the casing 600 to the preset theoretical thickness of the adjustment pad, which is recorded as δ1. For example, when the thickness of the adjustment pad is 2 mm, when the pitch of the threaded portion 120 is p=1 mm, the adjustment knob is adjusted exactly two times, that is, the height is 2 mm. The steps of adjusting the zeroing and gap adjustment of the measuring tool can also be combined with the depth vernier caliper.

[0089] like Figure 3 As shown, in the driving wheel bearing seat module, the quick adjustment gauge 100 is screwed into the top hole of the driving wheel bearing seat 210, and the three quick adjustment gauges 100 are zeroed and then set to the same extension length δ1 as the theoretical value of the adjustment pad.

[0090] After assembling the driven bevel gear 320 and the corresponding driven wheel bearing 420, driven wheel bearing sleeve 440, driven wheel locking nut 520, driven wheel bearing seat 220, etc. according to the assembly technical requirements, screw the three quick adjustment measuring tools 100 into the top holes of the driven wheel bearing seat 220, perform the same zeroing, record the initial scale, and adjust the gap to the theoretical thickness δ2 of the adjustment pad. In this embodiment, δ2=2mm.

[0091] like Figure 4a and Figure 4b As shown, in the driven wheel bearing seat module, the quick adjustment gauge 100 is screwed into the top hole of the driven wheel bearing seat 220, and the three quick adjustment gauges 100 are zeroed and then set to the same extension length δ2 as the theoretical value of the adjustment pad.

[0092] According to the technical requirements of gearbox assembly, the driving wheel bearing seat module and the driven wheel bearing seat module are installed with the corresponding fixtures, and after being assembled to the casing 600 (gearbox body), the side clearance and imprint are initially adjusted.

[0093] The driving wheel bearing seat module and the driven wheel bearing seat module are decomposed, and the adjustment pad thickness (here the adjustment pad thickness is replaced by the gaps δ1 and δ2 determined by the quick adjustment gauge 100) is determined to determine whether it needs to be increased or decreased according to the measured side clearance and the position of the imprint.

[0094] Figure 5a and Figure 5b As shown, it is a schematic diagram of the quick adjustment gauge of the utility model in the quick adjustment assembly state of the bevel gear impression of the gear box. The first adjustment part D1 (the gap is δ1) is the original driving wheel adjustment pad position, and the second adjustment part D2 (the gap is δ2) is the original driven wheel adjustment pad position. The two adjustment pads are replaced by the gaps δ1 and δ2 supported by the three ball head fulcrums of the adjustment gauge.

[0095] To increase the thickness of the adjustment pad, the adjustment knob is screwed in clockwise (in this embodiment, the thread is right-handed, so it is screwed in clockwise), and to reduce the thickness of the adjustment pad, the adjustment knob is screwed out counterclockwise. In this embodiment, the active wheel adjustment pad needs to be reduced by 0.1mm, and only three adjustment knobs need to be rotated counterclockwise for ten scales. Since δ1=2mm in this embodiment, the thickness of the active wheel adjustment pad is δ1=2-0.1=1.9mm.

[0096] According to the different groups of gap values ​​δ1 and δ2 adjusted by the knob each time, different side clearances and marks are obtained and recorded until a set of optimal solutions is finally determined. The corresponding gap values ​​δ1 and δ2 are recorded at this time, which are the required thicknesses of the active wheel adjustment pad and the driven wheel adjustment pad. If the accuracy of the gap value needs to be re-checked, the gap can be re-measured with a vernier caliper or other measuring tool to confirm.

[0097] According to the determined final thickness of the adjusting pad, the adjusting pad can be directly ground once.

[0098] In summary, the aviation engine bevel gear adjustment pad quick adjustment gauge of the utility model can greatly improve the work efficiency of bevel gear box assembly, and it has the following many beneficial effects:

[0099] 1. The utility model of the aircraft engine bevel gear adjustment pad quick adjustment measuring tool has a simple and practical structure, is easy to operate, and has high precision. For example, the adjustment precision in the above embodiment is 0.01mm, which has fully met the flatness tolerance value of the adjustment pad.

[0100] Second, the quick adjustment measuring tool of the utility model can save a lot of working hours in the bevel gear impression adjustment link.

[0101] 3. The quick adjustment measuring tool of the utility model is universal and can be used in the impression adjustment of different bevel gear boxes with similar structures and batch bevel gear boxes.

[0102] Fourth, the quick adjustment measuring tool of the utility model can save the process of grinding the adjustment pad multiple times, and only needs one grinding to finalize the shape.

[0103] Although the specific embodiments of the present invention are described above, those skilled in the art should understand that these are only examples, and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principle and essence of the present invention, but these changes and modifications fall within the protection scope of the present invention.

Claims

1. A quick adjustment gauge for an aircraft engine bevel gear adjustment pad, characterized in that: The quick adjustment gauge is used to be set in the top hole of the bearing seat to adjust the gap between two parts to be adjusted. The quick adjustment gauge includes: A knob portion, wherein the outer surface of the knob portion is provided with scale lines; A threaded portion, one end of which is connected to the lower surface of the knob portion, and an outer surface of the threaded portion has an external thread, and the external thread is used to cooperate with the internal thread in the top hole of the bearing seat; A support spring is abutted against the knob portion, and surrounds an outer circumference of the threaded portion.

2. The aircraft engine bevel gear adjustment pad quick adjustment gauge as claimed in claim 1, characterized in that: The upper surface of the knob portion has a hexagonal socket hole.

3. The aircraft engine bevel gear adjustment pad quick adjustment gauge as claimed in claim 1, characterized in that: The lower surface of the knob portion is provided with an annular groove.

4. The aircraft engine bevel gear adjustment pad quick adjustment gauge as claimed in claim 1, characterized in that: The end surface shape of the other end of the threaded portion is spherical.

5. The aircraft engine bevel gear adjustment pad quick adjustment gauge as claimed in claim 1, characterized in that: The number of the scale lines is 100, and the scale lines are evenly arranged on the outer surface of the knob portion.

6. The aircraft engine bevel gear adjustment pad quick adjustment gauge as claimed in claim 5, characterized in that: The gap change value between the two parts to be adjusted corresponding to every two scale lines is 0.01mm.

7. The aircraft engine bevel gear adjustment pad quick adjustment gauge as claimed in claim 1, characterized in that: The pitch of the external thread is 1 mm.

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