Metering method and device for an isochronous output variator

Abstract

The present application belongs to the technical field of torque measurement, and provides a measurement method of a heterogeneous output variable torque converter. The measured variable torque converter is inserted into the upper flange plate and fixed by tightening the concentric fixing screws. The upper and lower flange plates are aligned, and the input end is slowly rotated, so that the end of the variable torque converter is rotated under the drive of the gear, and after the connecting square hole of the stopper is aligned, the stopper is inserted, and the upper and lower flange plates are engaged. The connecting square rod is inserted into the input end, the standard torque instrument is slowly lowered through the machine tool table, and the connecting square rod is aligned after the standard torque instrument is connected. The input hand wheel of the turbine amplifier is shaken, so that the standard torque instrument applies a specific torque value. Through the readings of the input and output ends of the standard torque instrument, it is determined whether the measured variable torque converter meets the use requirements. The present application also provides a measurement device of a heterogeneous output variable torque converter. The present application realizes the measurement of the variable torque converter with the output of the torque from the shell gear ring through the above method, and avoids the interference of the torque transmission path.

Description

Technical Field

[0001] This invention patent belongs to the field of torque measurement technology, and specifically relates to a measurement method and device for heterogeneous output torque converters. Background Technology

[0002] Aircraft engines are the power source for flight and are of paramount importance for flight safety. After a certain period of operation, aircraft engines must be sent to a specialized engine repair shop for maintenance. Aircraft engines have complex structures, and assembly requires various specialized tools. To achieve the specified torsional torque, torque wrenches, torque screwdrivers, and other tightening measuring instruments are typically used, and these instruments need to be calibrated periodically.

[0003] The conventional method for measuring torque plates involves coaxially connecting the torque plate under test with a standard torque meter in a tight fit. When torque is applied directly or indirectly to the torque plate under test, the standard torque meter experiences torque and generates a corresponding electrical signal. This signal is amplified, converted from analog to digital, and displayed on a digital display measuring instrument to show the torque value of the torque meter under test. The relative indication error and repeatability of the torque meter under test are then calculated using formulas. In this traditional method, the torque output end and the standard are coaxial, and the torque transmission path is sequential. The input, fixed end, output end, and standard end are directly connected in sequence without interference. However, this traditional device cannot address the measurement of the torque multiplier in this case, where the conventional fixed end (outer gear ring) is converted into an output end, and the original output end becomes a fixed end. Connecting the standard torque meter using the traditional measurement method will cause interference with the stop end, making it impossible to transmit the torque of the outer gear ring to the torque sensor while simultaneously fixing the stop end. Summary of the Invention

[0004] The research object of this invention is a special tool for engine repair. To adapt to the disassembly of special engine parts, it transforms the fixed end of a traditional torque converter wrench into an output end, and the original output end into a fixed end. Its torque input and output shafts differ from those of conventional torque converters, making it impossible to measure using conventional metrological instruments. To meet the metrological requirements, based on the working principle of the instrument, two solutions are provided: a metrological method for heterogeneous output torque converters, including:

[0005] Step 1: Insert the torque converter 1 under test into the upper flange 21 and fix it in place, then tighten the centering fixing screws;

[0006] Step 2: Align the upper and lower flanges, slowly rotate the input end 11, so that the stop end 12 of the torque converter 1 rotates under the drive of the gear. After aligning with the connecting square hole 41 of the stop 4, insert it into the stop 4, and the upper and lower flanges will engage.

[0007] Step 3: Insert the connecting square bar 5 into the input end 11, and slowly lower the standard torque meter 31 through the machine tool table to align the connecting square bar 5;

[0008] Step four: crank the input handwheel of the turbine amplifier to apply a specific torque value to the standard torque meter 31. By comparing the readings of the standard torque meter 32 at the input and output terminals with the nominal amplified torque value, determine whether the torque converter 1 under test meets the usage requirements.

[0009] Furthermore, the engaging convex surface 211 of the upper flange 21 is aligned with the engaging concave surface 221 of the lower flange 22.

[0010] Furthermore, the torque converter 1 includes a sun gear, a ring gear, and a planet carrier, with rotational speeds of n1, n2, and n3 respectively. The ratio of the number of teeth of the ring gear to the sun gear is α. From the torques and structural parameters acting on each component of the mechanism, the characteristic equation representing the general motion law of the single-row planetary gear mechanism can be derived: n1+αn2-(1+α)n3=0.

[0011] Furthermore, the outer gear ring is selected as the output end, the planetary carrier remains stationary, and the calculated amplification factor is used as the measurement basis according to the actual gear ratio.

[0012] Another aspect of the present invention is to provide a metering device for a heterogeneous output torque converter, comprising: a base 6, the base 6 being fixed on a table, a standard torque meter 32 being mounted on the bottom surface of the base 6, the standard torque meter 32 being used to measure the torque of the torque converter 1, two support surfaces 7 being mounted on both sides of the base 6, and a stopper 4 being mounted on the top surface of the two support surfaces 7, the stopper 4 being used to fix the stop end of the torque converter 1; the metering device also includes a sleeve 2, the sleeve 2 internally enclosing the torque converter 1.

[0013] Furthermore, sleeve 2 is divided into upper flange 21 and lower flange 22.

[0014] Furthermore, the upper flange 21 has a central opening and an interlocking convex surface 211 on its side.

[0015] Furthermore, the bottom surface of the lower flange 22 has a connecting square hole 222, and the side surface has an interlocking concave surface 221.

[0016] Furthermore, the engagement convex surface 211 of the upper flange 21 and the engagement concave surface 221 of the lower flange 22 match each other, and the engagement surfaces are arranged in an alternating manner for automatic alignment.

[0017] Furthermore, the upper flange 21 is provided with a number of concentric holes 212, and fixing screws are inserted into the concentric holes 212 to fix the upper flange 21 and the torque converter 1.

[0018] Furthermore, the stopper 4 has a connecting square hole 41, and the stop end of the torque converter 1 passes through the connecting square hole 41.

[0019] Beneficial effects:

[0020] This invention uses a specific clamp to fix the torque converter under test, adding an external torque transmission path for a specific torque output end. Clampability is achieved through the upper and lower flange structure, torque is transmitted through the meshing tooth surface, and the fixed end of the torque converter is fixed through a perforation at a specific position, avoiding interference of the torque transmission path. Thus, the input, output, and fixed ends each perform their respective functions, and torque is transmitted as required at specific input and output ends. Measurement and calibration are achieved by connecting standard torque sensors to the input and output ends. Attached Figure Description

[0021] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0022] Figure 1 This is a schematic diagram of the overall calibration device.

[0023] Figure 2 This is a top view of the upper flange;

[0024] Figure 3 This is the front view of the upper flange;

[0025] Figure 4 This is a side view of the upper flange;

[0026] Figure 5 This is the front view of the lower flange;

[0027] Figure 6 This is a top view of the lower flange;

[0028] Figure 7 This is a top view of the stop.

[0029] The figure shows: 1. Torque converter; 11. Input end; 12. Stop end; 2. Sleeve; 21. Upper flange; 211. Engaging convex surface; 212. Alignment hole; 22. Lower flange; 221. Engaging concave surface; 222. Connecting square hole; 31. Standard torque meter; 32. Standard torque meter; 4. Stopper; 41. Connecting square hole; 5. Connecting square bar; 6. Base; 7. Support surface. Detailed Implementation

[0030] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0031] For heterogeneous input torque converters, the metering working principle is as follows:

[0032] Torque converter 1 contains a planetary gear pitch-changing system with two torque transmission paths. Torque converter 1 includes a sun gear, a ring gear, and a planet carrier, with rotational speeds of n1, n2, and n3, respectively. The gear ratio between the ring gear and the sun gear is α. Based on the torques acting on each component of the mechanism and the structural parameters, the characteristic equation representing the general motion law of a single-row planetary gear mechanism can be derived: n1 + αn2 - (1 + α)n3 = 0.

[0033] Torque transmission path 1: When the output end is a planetary carrier and the outer ring gear is stationary, n2 = 0. Substituting n1 + αn2 - (1 + α)n3 = 0, then n1 / n3 = 1 + α. According to the actual gear ratio in this case, the amplification factor at this time can be calculated to be 3.3.

[0034] Torque transmission path 2: When the output end is the outer ring gear and the planetary carrier is stationary, n3 = 0, n1 + αn2 - (1 + α)n3 = 0, then n1 / n2 = -α. According to the actual gear ratio in this case, the amplification factor at this time can be calculated to be 2.3.

[0035] In actual use, torque transmission path 2 is adopted, that is, the outer gear ring is the output end, the amplification factor k = 2.3, the maximum output torque marked on the torque converter is 1000Nm, and the allowable error of the relative indication error is 5%.

[0036] Based on the measurement parameters of the object being measured, it can be known that the tolerance of the standard torque device should meet the following requirements: MPET≤5% / 3=1.7%, and the maximum torque that the stop end needs to withstand is >1000Nm.

[0037] Fix the base to the table with bolts, insert the torque converter 1 into the upper flange 21, insert the centering fixing screw into the centering hole 212 of the upper flange 21 and tighten it to firmly fix the torque converter 1 in the upper flange 21.

[0038] Align the convex surface 211 of the upper flange 21 with the concave surface 221 of the lower flange 22, and pass the stop end 12 through the connecting square hole 222 of the lower flange 22. Slowly rotate the input end 11 on the top surface of the torque converter 1 so that the stop end 12 rotates under the drive of the gear. After aligning with the connecting square hole 41 of the stop 4, insert it into the stop 4. The concave and convex surfaces of the upper and lower flanges engage and merge into a sleeve 2.

[0039] Insert the connecting square bar 5 into the input end 11, and slowly lower the standard torque meter 31 at the input end through the machine tool table. After alignment, connect the square bar 5.

[0040] By cranking the input handwheel of the turbine amplifier, a specific torque value is applied to the input standard torque meter 31. The reading of the standard torque meter 32 is used to determine whether the torque converter 1 under test meets the usage requirements.

[0041] like Figure 1 As shown, the base 6 is fixed to the table with bolts. A standard torque meter 32 is fixedly installed on the bottom surface of the base 6 to measure the torque of the torque converter 1. A lower flange 22 is installed above the standard torque meter 32. The meshing concave surface 221 of the lower flange 22 faces upward, and the connecting square hole 222 of the lower flange 22 faces downward. Two support surfaces 7 are installed on both sides of the base 6. A stopper 4 is installed at the top of the two support surfaces 7. The stopper 4 passes through the meshing concave surface 221 of the lower flange 22. The connecting square hole 41 of the stopper 4 and the connecting square hole 222 of the lower flange 22 are on the same vertical axis. With this design, the torque can be completely transmitted to the standard torque meter 32 without interference.

[0042] Insert the torque converter 1 into the upper flange 21. There is a centering hole 212 on the front and sides of the upper flange 21. Insert the centering fixing screw into the centering hole 212 and tighten it. The three points firmly fix the torque converter 1 in the upper flange 21.

[0043] If only two screws are fixed, there will be wobbling and the stability will not be enough; if four concentric holes 212 are provided and four screws are fixed, the stability is almost the same as that of three screws. Therefore, it is preferable to provide three concentric holes 212 and three screws.

[0044] Preferably, the upper flange 21 has three engagement convex surfaces 211, located on the front and sides of the upper flange 21 respectively, and the lower flange 22 has four engagement concave surfaces 222, located on the cross axis of symmetry passing through the center. Among them, three engagement concave surfaces 222 correspond to the three engagement convex surfaces 211 of the upper flange 21, and two engagement concave surfaces 222 have deeper openings for placing the crossbar of the stopper 4.

[0045] Preferably, the upper flange 21 has four engagement convex surfaces 211, and the lower flange 22 has five engagement concave surfaces 222. Four engagement concave surfaces 222 correspond to the four engagement convex surfaces 211 of the upper flange 21, and two engagement concave surfaces 222 have deeper openings for placing the crossbar of the stopper 4.

[0046] Preferably, the upper flange 21 has five engagement convex surfaces 211, and the lower flange 22 has six engagement concave surfaces 222. Five engagement concave surfaces 222 correspond to the five engagement convex surfaces 211 of the upper flange 21, and two engagement concave surfaces 222 have deeper openings for placing the crossbar of the stopper 4.

[0047] Align the convex surface 211 of the upper flange 21 with the concave surface 222 of the lower flange 22 with the convex surface 211 facing downward. Pass the stop end 12 through the connecting square hole 222 of the lower flange 22. Slowly rotate the input end 11 on the top surface of the torque converter 1. The stop end 12 rotates under the drive of the gear. After aligning with the connecting square hole 41 of the stop 4, insert it into the stop 4. The concave and convex surfaces of the upper and lower flanges engage and merge into a sleeve 2.

[0048] Insert the connecting square bar 5 into the input end 11, and slowly lower the standard torque meter 31 at the input end through the machine tool table. After alignment, connect the square bar 5.

[0049] By cranking the input handwheel of the turbine amplifier, a specific torque value is applied to the input standard torque meter 31. The reading of the standard torque meter 32 is used to determine whether the torque converter 1 under test meets the usage requirements.

[0050] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A metering device for a heterogeneous output torque converter, comprising: A base (6) is fixed on a table. An output standard torque meter (32) is installed on the bottom surface of the base (6). The output standard torque meter (32) is used to measure the torque of the torque converter (1). Two support surfaces (7) are installed on both sides of the base (6). A stopper (4) is installed on the top surface of the two support surfaces (7). The stopper (4) is used to fix the stop end of the torque converter (1). The metering device is characterized in that it further includes a sleeve (2), which internally houses the torque converter (1); Select the outer gear ring as the output end, keep the planetary carrier stationary, and divide the sleeve (2) into an upper flange (21) and a lower flange (22); The upper flange (21) has a central opening and an interlocking convex surface (211) on its side. The lower flange (22) has a connecting square hole (222) on its bottom surface and an interlocking concave surface (221) on its side surface; The engagement convex surface (211) of the upper flange (21) and the engagement concave surface (221) of the lower flange (22) match each other, and the engagement surfaces are arranged in an alternating manner for automatic alignment; the lower flange (22) is installed above the standard torque meter (32) at the output end.

2. The metering device for a heterogeneous output torque converter according to claim 1, characterized in that: The upper flange (21) is provided with a plurality of concentric holes (212), and fixing screws are inserted into the concentric holes (212) to fix the upper flange (21) and the torque converter (1).

3. The metering device for a heterogeneous output torque converter according to claim 1, characterized in that: The stopper (4) has a connecting square hole (41), and the stop end of the torque converter (1) passes through the connecting square hole (41).

4. A measurement method for a heterogeneous output torque converter, characterized in that, The metering device using the heterogeneous output torque converter according to any one of claims 1-3 includes: Step 1: Insert the torque converter (1) under test into the upper flange (21) and fix it in place, then tighten the centering screws. Step 2: Align the upper and lower flanges, slowly rotate the input end (11) so that the stop end (12) of the torque converter (1) rotates under the drive of the gear. After aligning the connection square hole (41) of the stop (4), insert it into the stop (4) and the upper and lower flanges engage. Step 3: Insert the connecting square bar (5) into the input end (11), slowly lower the standard torque meter (31) at the input end through the machine tool table, and connect the square bar (5) after alignment; Step 4: Shake the input handwheel of the turbine amplifier to apply a specific torque value to the input standard torque meter (31). By comparing the readings of the input and output standard torque meters with the nominal amplified torque value, determine whether the torque converter (1) under test meets the usage requirements.

5. The metering method for a heterogeneous output torque converter according to claim 4, characterized in that: Align the engagement convex surface (211) of the upper flange (21) with the engagement concave surface (221) of the lower flange (22).

6. The metering method for a heterogeneous output torque converter according to claim 4, characterized in that: The torque converter (1) includes a sun gear, a ring gear and a planet carrier, with rotational speeds of n1, n2 and n3 respectively. The ratio of the number of teeth of the ring gear to the sun gear is α. The characteristic equation representing the general motion law of a single-row planetary gear mechanism can be derived from the torque and structural parameters acting on each component of the mechanism: n1+αn2-(1+α)n3=0.

7. The metering method for a heterogeneous output torque converter according to claim 6, characterized in that: Select the outer gear ring as the output end, keep the planetary carrier stationary, and use the calculated amplification factor as the measurement basis according to the actual gear ratio.

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