CN217637153U - Detection apparatus for brake casing depth of parallelism and axiality under helicopter main reducing gear - Google Patents
Detection apparatus for brake casing depth of parallelism and axiality under helicopter main reducing gear Download PDFInfo
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- CN217637153U CN217637153U CN202221391630.2U CN202221391630U CN217637153U CN 217637153 U CN217637153 U CN 217637153U CN 202221391630 U CN202221391630 U CN 202221391630U CN 217637153 U CN217637153 U CN 217637153U
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Abstract
Detection apparatus of quick-witted floodgate casing depth of parallelism and axiality under helicopter main reducer includes: the device comprises adjustable support legs, a base, a platform, a rotary table, a pressure regulating handle, a hydraulic expansion mandrel, a fixed meter frame, a short clamping meter assembly, a long clamping meter assembly, a first digital display dial indicator and a second digital display dial indicator, wherein the adjustable support legs are arranged below the base, and the platform is fixed above the base; a rotary table is arranged in the middle of the platform; the rotary table is provided with an equal-height block, the middle of the rotary table is provided with a hydraulic expansion mandrel, and the middle of the hydraulic expansion mandrel is vertically provided with a fixed meter support; the fixed meter frame is provided with a long meter clamping component and a short meter clamping component, the long meter clamping component is connected with the fixed meter frame through a screwing nut, and the short meter clamping component is connected with the fixed meter frame through a screwing nut; the end parts of the long gauge clamping component and the short gauge clamping component are respectively provided with a first digital display dial indicator and a second digital display dial indicator. The utility model discloses the beneficial effect who reaches is: the method has the characteristics of suitability for field measurement, low cost, high detection efficiency and high measurement precision.
Description
Technical Field
The utility model relates to an aircraft engine detects technical field, especially a detection device of brake casing depth of parallelism and axiality under helicopter main reducer.
Background
The lower brake shell of the helicopter main reducer is a magnesium-aluminum alloy casting, and the main reducer connected with the engine is arranged in the lower brake shell, so that the lower brake shell has a protection effect on the main reducer and ensures the normal operation of the main reducer; the lower brake shell of the main reducer of the helicopter has large size, complex mechanism, heavier weight and softer material. When the main reducer is repaired, the used state of the lower casing shell of the main reducer needs to be checked, and whether the state can meet the use requirement or not is judged. At present, before the lower brake shell of the main speed reducer is assembled or when the main speed reducer is inspected, parallelism and coaxiality of the lower brake shell need to be detected, whether parameters of the lower brake shell meet set error ranges or not is determined, the size of a datum plane of the lower brake shell of the main speed reducer of the helicopter is smaller than that of an upper end face, a datum hole is arranged at the lower part of the shell, the height size is large, and the dimensional tolerance of the datum hole is too large relative to the coaxiality requirement.
In the existing method, a positioning frame is assembled on a lower brake shell of a main speed reducer during measurement, three coordinates are adopted for measuring the lower brake shell, however, due to the fact that the size of the lower brake shell is large, large-size three-coordinate measuring equipment needs to be arranged, a three-coordinate detection mode has great limitation, large-size three-coordinate equipment and special equipment room need to be arranged, the equipment utilization rate is low, the measurement is complex, and the production cost is high.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art's shortcoming, provide a detection device of brake casing depth of parallelism and axiality under helicopter main reducer.
The purpose of the utility model is realized through the following technical scheme: a detection device for parallelism and coaxiality of a lower brake shell of a main reducer of a helicopter comprises: the device comprises adjustable support legs, a base, a platform, a rotary table, an equal-height block, a pressure regulating handle, a hydraulic expansion mandrel, a screwing nut, a meter clamping screw, a digital display dial indicator, an adjusting screw, a long meter clamping assembly, a short meter clamping assembly, a fixed meter frame and a pressure meter, wherein the adjustable support legs are arranged below the base, and the platform is fixed above the base;
a rotary table is arranged in the middle of the platform, an equal-height block is arranged on the rotary table, the hydraulic expansion mandrel is arranged in the middle of the rotary table, and a fixed gauge stand is vertically arranged in the middle of the hydraulic expansion mandrel;
the fixed meter frame is provided with a long meter clamping component and a short meter clamping component, the long meter clamping component is connected with the fixed meter frame through a screwing nut, and the short meter clamping component is connected with the fixed meter frame through a screwing nut;
and the end parts of the long clamping meter component and the short clamping meter component are respectively provided with a digital display dial indicator.
Preferably, a pressure gauge is arranged on the hydraulic expansion mandrel, and a pressure regulating handle is further arranged on the hydraulic expansion mandrel.
Preferably, equal-height blocks are arranged on the rotary table, wherein three groups of equal-height blocks are arranged and are uniformly distributed on the rotary table.
Preferably, the long dial gauge component is connected with a first digital display dial gauge through a dial gauge clamping screw, and the first digital display dial gauge is further provided with an adjusting screw; the short clamp meter assembly is connected with the second digital display dial indicator through a clamp meter screw.
Preferably, the first digital display dial indicator measures deviation in the vertical direction, and the second digital display dial indicator measures deviation in the horizontal direction.
Preferably, the long clamp meter assembly and the short clamp meter assembly can be rotated to a vertical direction through adjustment of screwing a nut.
Preferably, the first digital display percentage meter and the second digital display percentage meter are electrically connected with a measuring computer, data measured by the digital display percentage meters are sent to the measuring computer in real time, and the measuring computer generates a measuring data meter and outputs a measuring result.
The utility model has the advantages of it is following:
(1) According to the scheme, three groups of equal-height blocks are arranged, the lower machine brake shell of the main speed reducer is placed on the equal-height blocks, the equal-height blocks are used for determining a measurement reference surface, the high-precision rotary table is rotated to drive a measured part to rotate, the parallelism between the upper end surface and the lower end surface of the lower machine brake shell of the main speed reducer is detected through the first digital display dial indicator, the measurement difficulty is low, and the cost is low;
(2) The coaxiality error is obtained by a method of calculating the distance from the circle center to the reference axis, the reference axis is determined, the axis of the high-precision rotary table is fixed with the reference axis, the high-precision rotary table is rotated to drive the measured part to rotate, and the second digital display dial indicator reads the maximum value and the minimum value which change along with the deviation of the axis of the measured section from the reference axis, so that the measurement of the coaxiality is realized, the measurement method is simple, and the cost is low;
(3) The coaxiality and the parallelism of the lower brake shell of the main reducer of the helicopter are measured, the lower brake shell can adapt to application in various scenes, a special measuring device room is not needed, and the production cost is reduced.
Drawings
FIG. 1 is a schematic structural diagram of the device of the present invention;
FIG. 2 is a schematic view of a lower brake housing of the main reducer of the helicopter;
in the figure: the method comprises the following steps of 1-adjustable support legs, 2-a base, 3-a platform, 4-a rotary table, 5-a pressure regulating handle, 6-a hydraulic expansion mandrel, 7-an equal-height block, 8-a fixed meter frame, 9-a short meter clamping component, 10-a long meter clamping component, 11-a first digital display dial indicator, 12-a second digital display dial indicator, 13-a meter clamping screw, 14-a tightening screw cap, 21-a stud, 22-a surface and 23-a reference hole.
Detailed Description
The invention will be further described with reference to the drawings, but the scope of the invention is not limited to the following.
As shown in fig. 1-2, a device for detecting parallelism and coaxiality of a lower brake casing of a main reducer of a helicopter comprises: the device comprises adjustable support legs 1, a base 2, a platform 3, a rotary table 4, an equal-height block 7, a pressure regulating handle 5, a hydraulic expansion mandrel 6, a tightening screw cap 14, a meter clamping screw 13, a digital display dial indicator, a long meter clamping assembly 10, a short meter clamping assembly 9, a fixed meter frame 8 and a pressure meter, wherein the adjustable support legs 1 are arranged below the base 2, and the platform 3 is fixed above the base 2; a rotary table 4 is arranged in the middle of the platform 3, an equal-height block 7 is arranged on the rotary table 4, a hydraulic expansion mandrel 6 is arranged in the middle of the rotary table 4, and a fixed gauge stand 8 is vertically arranged in the middle of the hydraulic expansion mandrel 6; the fixed meter frame 8 is provided with a long meter clamping component 10 and a short meter clamping component 9, the long meter clamping component 10 is connected with the fixed meter frame 8 through a screwing nut 14, and the short meter clamping component 9 is connected with the fixed meter frame 8 through the screwing nut 14; the end parts of the long gauge clamping component 10 and the short gauge clamping component 9 are respectively provided with a digital display dial indicator.
Particularly, this detection device's bottom is equipped with four adjustable stabilizer blades 1, adjustable stabilizer blade 1 is installed in base 2 below, can adjust detection device through adjusting four adjustable stabilizer blades 1, adjust detection device to the level, be detection device's base 2 on the adjustable stabilizer blade 1, base 2 is used for supporting measured object and other parts, base 2 top is fixed with platform 3, install revolving stage 4 in the middle of the platform 3, revolving stage 4 is used for placing the measuring object, rotate revolving stage 4 during the measurement, revolving stage 4 drives the measured object and rotates. In order to prevent the measured part from being placed on the rotary table 4 in an unbalanced manner, three groups of equal-height blocks 7 are arranged on the rotary table 4, the three groups of equal-height blocks 7 are uniformly distributed on the rotary table 4, the A surface of the lower brake shell can be placed on the three groups of equal-height blocks 7, and the three groups of equal-height blocks 7 can avoid studs 21 on the A surface 22, so that the detection device is prevented from being damaged. The high-precision hydraulic expansion mandrel 6 is fixedly arranged in the middle of the rotary table 4, and the influence of the manufacturing error of the positioning reference hole 23 on the measurement is eliminated through the expansion characteristic of the hydraulic expansion mandrel 6. Wherein, hydraulic expansion mandrel 6 is equipped with pressure regulating device, and accessible pressure regulating handle 5 regulated pressure still installs the manometer on the hydraulic expansion mandrel 6, measurable quantity hydraulic expansion mandrel 6's pressure. The middle of the hydraulic expansion mandrel 6 is vertically provided with a fixed meter frame 8, the fixed meter frame 8 is used for installing a fixed long clamp meter component 10 and a short clamp meter component 9, the long clamp meter component 10 and the short clamp meter component 9 are connected with the fixed meter frame 8 through screwing nuts respectively, the long clamp meter component 10 and the short clamp meter component 9 can be rotationally adjusted to be vertical through screwing nuts, and a measured part can be conveniently placed on a measuring device. And a first digital display dial indicator 11 and a second digital display dial indicator 12 are respectively arranged at two ends of the long clamp gauge component 10 and the short clamp gauge component 9, wherein the first digital display dial indicator 11 is used for measuring the parallelism of a measured piece, and the second digital display dial indicator 12 is used for measuring the coaxiality of the measured piece.
Specifically, the present embodiment will be described in connection with a specific usage process. When in use, the adjustable supporting feet 1 at the bottom of the detection device are adjusted to be in a balanced state; screwing the screwing nuts 14 on the long clamp meter assembly 10 and the short clamp meter assembly 9, loosening the long clamp meter assembly 10 and the short clamp meter assembly 9, and rotating the long clamp meter assembly 10 and the short clamp meter assembly 9 to be consistent with the axial direction of the fixed meter frame 8. Hoisting the lower brake shell of the helicopter main reducer to the position above the detection device through a special hoisting tool, slowly lowering the lower brake shell of the helicopter main reducer, strictly observing the lower brake of the main reducer in the descending process, avoiding the collision between a stud 21 on the lower brake shell of the helicopter main reducer and the detection device, and ensuring the lower brake shell of the helicopter main reducer to be accurately lowered in place; in the downward moving process, the direction of the lower brake shell of the helicopter main reducer needs to be manually adjusted, a hole in the middle of the lower brake shell enters an expansion mandrel, the equal-height block 7 on the rotary table 4 is arranged in a gap of a stud 21 on the lower end surface of the lower brake shell of the helicopter main reducer and is supported on an annular reference surface of the lower end surface, and the lower brake shell of the helicopter main reducer cannot interfere with a pressure gauge. After the lower brake shell of the main reducing gear of the helicopter is installed in the detection device, the lower brake shell of the main reducing gear of the helicopter is pushed manually, the center of the lower brake shell of the main reducing gear of the helicopter is approximately concentric with the expansion mandrel, the pressure regulating handle 5 is rotated to regulate the pressure of the expansion mandrel, when the display value of the pressure gauge reaches a selected value, the pressure regulating handle 5 stops rotating, and at the moment, the lower brake shell of the main reducing gear is placed in place. And (3) rotating the positions of the long dial gauge assembly 10 and the short dial gauge assembly 9 to enable the positions to be approximately vertical to the fixed dial gauge frame 8, screwing and screwing the screw cap 14, and fixing the two digital display dial gauges. Adjusting the adjusting screw and enabling the first digital display dial indicator 11 and the second digital display dial indicator 12 to be in contact with the measured surface respectively, wherein the digital display dial indicator has a certain pre-compression amount, and the phenomenon that the digital display dial indicator is damaged due to the hard force between the surface of the measured part and the digital display dial indicator, and the measuring precision is affected is avoided. A spindle having a fitting clearance of 0 is inserted into the reference hole 23 to determine a reference axis. The axis of the high-precision rotary table 4 is fixed with the reference axis, and the high-precision rotary table 4 is rotated to drive the measured piece to rotate. At this time, the measuring head on the second digital display dial indicator 12 is not moved, and the measuring point rotates around the reference axis along with the part. The reading of the second digital display dial indicator 12 changes along with the deviation of the axis of the measured section from the reference axis, the maximum value and the minimum value of the measured data are read, and the coaxiality error of the part is calculated, so that the coaxiality is measured. Meanwhile, the first digital display dial indicator 11 measures the parallelism between the upper end face and the lower end face of the measured part. Wherein, the equal-height block 7 is used for determining a measuring reference surface, and the high-precision rotary table 4 is rotated to drive the measured part to rotate. At the moment, the measuring head is not moved, and the measuring point rotates around the reference axis along with the part. The reading of the first digital display dial indicator 11 changes along with the change of the parallel amount of the measured plane relative to the reference plane, the maximum value and the minimum value of the measured data are read out, and the parallelism error of the part is calculated, so that the face-to-face parallelism measurement is realized. And uploading the measurement data of the first digital display dial indicator 11 and the second digital display dial indicator 12 to a computer, calculating and analyzing the measurement data to generate a measurement form, outputting a measurement result and finishing measurement.
The above examples only represent preferred embodiments, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention.
Claims (7)
1. A detection device for parallelism and coaxiality of a lower brake shell of a helicopter main reducer comprises: adjustable stabilizer blade (1), base (2), platform (3), revolving stage (4), pressure regulating handle (5), hydraulic pressure inflation mandrel (6), high piece (7), fixed table skeleton (8), short double-layered table subassembly (9), long double-layered table subassembly (10), first digital display percentage table (11) and second digital display percentage table (12), its characterized in that: the adjustable supporting feet (1) are arranged below the base (2), and the platform (3) is fixed above the base (2);
a rotary table (4) is arranged in the middle of the platform (3), an equal-height block (7) is arranged on the rotary table (4), the hydraulic expansion mandrel (6) is arranged in the middle of the rotary table (4), and a fixed gauge stand (8) is vertically arranged in the middle of the hydraulic expansion mandrel (6);
a long meter clamping component (10) and a short meter clamping component (9) are mounted on the fixed meter frame (8), the long meter clamping component (10) is connected with the fixed meter frame (8) through a screwing nut (14), and the short meter clamping component (9) is connected with the fixed meter frame (8) through a screwing nut (14);
the end parts of the long meter clamping component (10) and the short meter clamping component (9) are respectively provided with a first digital display dial indicator (11) and a second digital display dial indicator (12).
2. The detection device according to claim 1, wherein: the hydraulic expansion mandrel (6) is provided with a pressure gauge, and the hydraulic expansion mandrel (6) is also provided with a pressure regulating handle (5).
3. The detection device according to claim 1, wherein: the rotary table (4) is provided with three groups of equal-height blocks (7), wherein the equal-height blocks (7) are uniformly distributed on the rotary table (4).
4. The detection device according to claim 1, wherein: the long dial gauge assembly (10) is connected with a first digital display dial gauge (11) through a dial gauge clamping screw (13), and an adjusting screw is further installed on the first digital display dial gauge (11); the short dial gauge component (9) is connected with the second digital display dial gauge (12) through a dial gauge clamping screw (13).
5. The detection device according to claim 4, wherein: the first digital display dial indicator (11) measures deviation in the vertical direction, and the second digital display dial indicator (12) measures deviation in the horizontal direction.
6. The detection device according to claim 4 or 5, wherein: the long clamp meter assembly (10) and the short clamp meter assembly (9) can be rotated to the vertical direction through adjustment of screwing a nut (14).
7. The detection device according to claim 1, wherein: the first digital display dial indicator (11) and the second digital display dial indicator (12) are electrically connected with a measuring computer, data measured by the digital display dial indicators are sent to the measuring computer in real time, and the measuring computer generates a measuring data table and outputs a measuring result.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221391630.2U CN217637153U (en) | 2022-06-01 | 2022-06-01 | Detection apparatus for brake casing depth of parallelism and axiality under helicopter main reducing gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221391630.2U CN217637153U (en) | 2022-06-01 | 2022-06-01 | Detection apparatus for brake casing depth of parallelism and axiality under helicopter main reducing gear |
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| Publication Number | Publication Date |
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| CN217637153U true CN217637153U (en) | 2022-10-21 |
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| CN202221391630.2U Active CN217637153U (en) | 2022-06-01 | 2022-06-01 | Detection apparatus for brake casing depth of parallelism and axiality under helicopter main reducing gear |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116718098A (en) * | 2023-08-09 | 2023-09-08 | 成都国营锦江机器厂 | Online measurement device for coaxiality of main stay bar of helicopter and application method |
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2022
- 2022-06-01 CN CN202221391630.2U patent/CN217637153U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116718098A (en) * | 2023-08-09 | 2023-09-08 | 成都国营锦江机器厂 | Online measurement device for coaxiality of main stay bar of helicopter and application method |
| CN116718098B (en) * | 2023-08-09 | 2023-10-17 | 成都国营锦江机器厂 | Online measurement device for coaxiality of main stay bar of helicopter and application method |
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