A universal blade weight moment measuring fixture

Abstract

The application belongs to the technical field of aero-engine measurement, and particularly relates to a universal blade weight moment measurement clamp. The clamp comprises a telescopic arm assembly and a clamping mechanism assembly. The telescopic arm assembly comprises a base, a sleeve, an end cover, a telescopic rod and a mounting plate. The clamping mechanism assembly comprises a mounting seat, a radial positioning block, an axial positioning ruler and a top fixture screw rod. When different stage blade weight moment measurement is performed, the telescopic length of the telescopic rod is adjusted according to the actual working radius of the blade, the position of the axial positioning ruler is adjusted according to the axial width of the blade tenon, and the opening size between the upper positioning block and the lower positioning block is adjusted according to the size of the clamping part of the blade tenon. The clamp can ensure that the clamping state of the blade can well simulate the actual working state of the blade, the measurement result is relatively accurate, one tool can be used for multiple purposes, the processing cost of the tool is effectively saved, and the storage space of the tool is saved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of aero-engine measurement, and particularly relates to a universal vane weight moment measurement clamp. BACKGROUND

[0002] When a certain type of gas turbine low-pressure compressor rotor is balanced, the weight moment of the rotor vane needs to be measured. The low-pressure compressor rotor has six stages of working vanes, and the actual working radius and tenon size of vanes of different stages are different. Therefore, a universal clamp capable of measuring the weight moments of vanes of one to six stages needs to be designed. The clamp has the ability to clamp the tenon of vanes of one to six stages, and the length of the arm thereof can be adjusted to ensure that the weight moment measurement radius is consistent with the actual working radius of the vane.

[0003] The main shortcomings and deficiencies of the existing vane weight moment measurement clamp are as follows:

[0004] (1) The clamping part structure of the existing vane weight moment measurement clamp is fixed and cannot be contracted or expanded. Therefore, it can only clamp the tenon of one type of vane.

[0005] (2) The length of the arm of the existing vane weight moment measurement clamp is fixed and cannot be changed. Therefore, it can only simulate the working radius of vanes of a certain length.

[0006] (3) When measuring the weight moments of multiple stages or multiple types of rotor vanes, multiple sets of existing types of clamps need to be designed, which greatly increases the production cost of the tooling and the storage space of the tooling.

[0007] (4) When measuring the weight moments of different types of rotor vanes using the existing type of clamp, the clamping tooling needs to be replaced, which brings unnecessary cumbersome operation steps to the actual work and has a certain impact on the work efficiency on site.

[0008] Therefore, it is desirable to have a technical solution to overcome or at least alleviate at least one of the aforementioned deficiencies of the prior art. SUMMARY

[0009] The purpose of the present application is to provide a universal vane weight moment measurement clamp to solve at least one problem existing in the prior art.

[0010] The technical solution of the present application is:

[0011] A universal vane weight moment measurement clamp, comprising:

[0012] A telescopic arm assembly, the telescopic arm assembly comprising a base, a sleeve, an end cap, a telescopic rod and a mounting plate, wherein,

[0013] The base is connected to a weight moment balance;

[0014] One end of the sleeve is connected with the base, an inner part of the sleeve has a containing cavity, and the other end of the sleeve is provided with a first opening in communication with the containing cavity;

[0015] One end of the telescopic rod is installed in the containing cavity through the first opening and connected with the sleeve through a end cover;

[0016] The mounting plate is installed at the other end of the telescopic rod;

[0017] The clamping mechanism assembly comprises a mounting seat, a radial positioning block, an axial positioning ruler and a top screw rod, wherein,

[0018] The mounting seat is in a U shape and comprises an upper mounting plate, a lower mounting plate and a back plate, guide columns are installed between the upper mounting plate and the lower mounting plate, and the back plate is fixedly connected with the mounting plate;

[0019] The radial positioning block comprises an upper positioning block and a lower positioning block, the upper positioning block is sleeved on the guide column and connected with the upper mounting plate through an upper positioning block screw rod and an M5 slotted disc head positioning screw, and the lower positioning block is sleeved on the guide column and connected with the lower mounting plate through a lower positioning block screw rod and an M5 slotted disc head positioning screw;

[0020] One end of the lower positioning block is provided with a side plate, and a plug-in slot is formed between the side plate and the lower positioning block;

[0021] The axial positioning ruler is in an L shape, is installed in the plug-in slot and positioned through a first M3 internal hexagonal screw rod installed on the lower positioning block;

[0022] The top screw rod is installed on the back plate.

[0023] In at least one embodiment of the present application, the end of the sleeve connected with the base is provided with a flange mounting edge, and the flange mounting edge is connected with the base through an M5 internal hexagonal screw rod.

[0024] In at least one embodiment of the present application, a sliding groove is formed on the telescopic rod, a second opening is formed on the end cover, a boss is arranged at the second opening, the end cover is connected with the sleeve through a second M3 internal hexagonal screw rod, and the boss is matched with the sliding groove.

[0025] In at least one embodiment of the present application, the telescopic rod has multiple length specifications.

[0026] In at least one embodiment of the present application, an M4 internal hexagonal screw rod is installed on the sleeve side wall, and the telescopic rod is locked with the sleeve through the M4 internal hexagonal screw rod after the position of the telescopic rod is adjusted.

[0027] In at least one embodiment of the present application, two of the guide posts are arranged in parallel.

[0028] In at least one embodiment of the present application, the mounting plate is L-shaped, comprising a first mounting plate and a second mounting plate, the first mounting plate being fixedly connected with the telescopic rod;

[0029] A connecting plate is vertically arranged on the back plate, and the connecting plate is fixedly connected with the second mounting plate.

[0030] In at least one embodiment of the present application, the upper positioning block comprises an upper fixed part and an upper clamping part, and the lower positioning block comprises a lower fixed part and a lower clamping part, and the end of the upper clamping part and the lower clamping part is provided with an inclined surface facilitating the installation of a blade tenon.

[0031] In at least one embodiment of the present application, a small knob is arranged on the upper positioning block screw and the lower positioning block screw.

[0032] In at least one embodiment of the present application, a large knob is arranged on the top die screw.

[0033] The present application has at least the following beneficial technical effects:

[0034] The universal blade weight moment measuring fixture of the present application can realize the clamping work of the first to sixth stage blades of the low-pressure compressor rotor, can ensure that the clamping state of the blade can well simulate the actual working state of the blade, makes the measurement result more accurate, realizes one tool multiple purposes, effectively saves the processing cost of the tool and saves the storage space of the tool, and indirectly improves the work efficiency on site since different blades do not need to replace the clamping tool. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 is a schematic diagram of the universal blade weight moment measuring fixture of one embodiment of the present application as a whole;

[0036] Figure 2 is a schematic diagram of the telescopic arm assembly of one embodiment of the present application;

[0037] Figure 3 is a schematic diagram of the clamping mechanism assembly of one embodiment of the present application from one angle;

[0038] Figure 4 is a schematic diagram of the clamping mechanism assembly of one embodiment of the present application from another angle;

[0039] Figure 5 is a schematic diagram of the assembly of the universal blade weight moment measuring fixture of one embodiment of the present application and the blade from one angle;

[0040] Figure 6 is another angle view of the general-purpose blade weight moment measurement fixture and blade assembly of one embodiment of the present application.

[0041] wherein:

[0042] 1 - telescopic arm assembly; 2 - clamping mechanism assembly; 3 - base; 4 - M5 hexagonal socket screw; 5 - sleeve; 6 - M4 hexagonal socket screw; 7 - end cover; 8 - mounting plate; 9 - telescopic rod; 10 - second M3 hexagonal socket screw; 11 - side plate; 12 - guide post; 13 - small knob; 14 - positioning block screw; 15 - upper positioning block; 16 - large knob; 17 - axial positioning scale; 18 - mounting seat; 19 - lower positioning block; 20 - M6 nut; 21 - first M3 hexagonal socket screw; 22 - top fixture screw; 23 - M5 slotted head positioning screw. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical scheme and advantages of the present application clearer, the technical scheme of the embodiments of the present application will be described in more detail below in combination with the drawings of the embodiments of the present application. In the drawings, the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some of the embodiments of the present application, not all the embodiments. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application. The embodiments of the present application will be described in detail below in combination with the drawings.

[0044] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the scope of protection of the present application.

[0045] The drawings will be described below in combination with the Figures 1 to 6 The present application will be further described in detail.

[0046] The present application provides a general-purpose blade weight moment measurement fixture, comprising: a telescopic arm assembly 1 and a clamping mechanism assembly 2.

[0047] Specifically, as Figure 2As shown, the telescopic arm assembly 1 includes a base 3, a sleeve 5, an end cover 7, a telescopic rod 9 and a mounting plate 8, wherein the base 3 is connected with the weight moment balance through a plurality of circumferentially distributed screws; one end of the sleeve 5 is fixedly connected with the base 3, the inside of the sleeve 5 has a receiving cavity, and the other end of the sleeve 5 is provided with a first opening in communication with the receiving cavity; one end of the telescopic rod 9 is installed in the receiving cavity through the first opening and is connected with the sleeve 5 in cooperation with the end cover 7, and the assembly position of the telescopic rod 9 in the sleeve 5 is adjustable; the mounting plate 8 is fixedly installed at the other end of the telescopic rod 9 and is used for being connected with the clamping mechanism assembly 2.

[0048] In the preferred embodiment of the present application, the end of the sleeve 5 connected with the base 3 is provided with a flange mounting edge, and the flange mounting edge is connected with the base 3 through four circumferentially distributed M5 inner hexagonal screws 4. A sliding groove is formed on the telescopic rod 9, the end of the sliding groove inside the sleeve 5 is closed, the end close to the mounting plate 8 is provided with a notch, a second opening is formed on the end cover 7, a boss is arranged at the second opening, the end cover 7 is connected with the sleeve 5 through four circumferentially distributed second M3 inner hexagonal screws 10, the boss is in sliding cooperation with the sliding groove, and the boss can prevent the telescopic rod 9 from being pulled out of the receiving cavity of the sleeve 5. In order to meet the measurement requirements of the weight moments of the blades with different lengths of working radius, the telescopic rod 9 can have a plurality of length specifications. Advantageously, in the embodiment, M4 inner hexagonal screws 6 are installed on the side wall of the sleeve 5, and after the position of the telescopic rod 9 is adjusted, the telescopic rod 9 is locked with the sleeve 5 through the M4 inner hexagonal screws 6.

[0049] As shown in the drawings, Figures 3-4 As shown, the clamping mechanism assembly 2 includes a mounting seat 18, a radial positioning block, an axial positioning ruler 17 and a jacking screw 22, wherein the mounting seat 18 is in U shape and includes an upper mounting plate, a lower mounting plate and a back plate connecting the upper mounting plate and the lower mounting plate, a guide column 12 is installed between the upper mounting plate and the lower mounting plate, and the back plate is fixedly connected with the mounting plate 8; the positioning block screw 14 includes an upper positioning block screw and a lower positioning block screw, the radial positioning block includes an upper positioning block 15 and a lower positioning block 19, a through hole is formed on the upper positioning block 15, the upper positioning block 15 is sleeved on the guide column 12 through the through hole and is connected with the upper mounting plate through the upper positioning block screw and an M5 slotted disc head positioning screw 23, a through hole is formed on the lower positioning block 19, the lower positioning block 19 is sleeved on the guide column 12 through the through hole and is connected with the lower mounting plate through the lower positioning block screw and the M5 slotted disc head positioning screw 23; one end of the lower positioning block 19 is provided with a side plate 11, and the side plate 11 and the lower positioning block 19 form a plug-in slot; the axial positioning ruler 17 is in L shape, the axial positioning ruler 17 is installed in the plug-in slot and is positioned through a first M3 inner hexagonal screw 21 installed on the lower positioning block 19; the jacking screw 22 is installed on the back plate.

[0050] In the preferred embodiment of the present application, corresponding mounting holes are formed on the upper mounting plate and the lower mounting plate, and the guide posts 12 are fixed by cooperating with the M6 nuts 20 after passing through the mounting holes. In the embodiment, two guide posts 12 are preferably arranged in parallel.

[0051] In the preferred embodiment of the present application, the mounting plate 8 is L-shaped, including a first mounting plate and a second mounting plate, and the first mounting plate is fixedly connected with the telescopic rod 9. The back plate is vertically provided with a connecting plate, and the connecting plate is fixedly connected with the second mounting plate.

[0052] In the preferred embodiment of the present application, the upper positioning block 15 includes an upper fixed part and an upper clamping part, and the lower positioning block 19 includes a lower fixed part and a lower clamping part. The upper fixed part and the lower fixed part are respectively used for mounting the upper positioning block 15 and the lower positioning block 19. The end of the upper clamping part and the lower clamping part is provided with an inclined surface facilitating the installation of the blade tenon.

[0053] It can be understood that in the embodiment, the upper positioning block screw and the lower positioning block screw are both provided with small knobs 13 facilitating operation, and the top tool screw 22 is provided with a large knob 16 facilitating operation.

[0054] The universal blade weight moment measuring fixture of the present application can be used for measuring the weight moment of the first to sixth stage working blades of a certain type of gas turbine low-pressure compressor rotor. The use principle is as shown in Figures 5-6 The use mode of the fixture is as follows: first, the fixture is installed on the weight moment balance, that is, the base 3 is connected together with the weight moment balance through screws; then, according to the actual working radius of the blade to be measured, the telescopic length of the telescopic rod 9 is adjusted to ensure that the measurement radius of the blade is the same as the actual working radius of the blade, and the telescopic rod 9 and the sleeve 5 are locked by tightening the M4 internal hexagonal screw 6 to prevent the telescopic rod 9 from moving during the measurement process, which may cause inaccurate measurement results; then, according to the axial width of the blade tenon, the position of the axial positioning ruler 17 is adjusted to ensure that the radial center line of the blade coincides with the radial center line of the fixture measuring arm, and the axial positioning ruler 17 and the lower positioning block 19 are locked by tightening the first M3 internal hexagonal screw 21 to prevent the axial positioning ruler 17 from moving during the measurement process, which may cause inaccurate measurement results; further, according to the size of the blade tenon clamping part, the position of the upper positioning block 15 and the lower positioning block 19 is adjusted up and down by rotating the small knob 13 to control the opening size of the clamping mechanism assembly 2, and to ensure that the distance between the upper positioning block 15 and the lower positioning block 19 and the radial center line of the fixture measuring arm is the same, so as to ensure that the radial center line of the blade coincides with the radial center line of the fixture measuring arm; then, the blade tenon is put into the opening of the clamping mechanism assembly 2 from one end, and the side surface of the blade tenon abuts against the axial positioning ruler 17, and the top tool screw 22 is tightened against the bottom surface of the blade tenon by rotating the large knob 16, thereby completing the clamping operation of the blade weight moment measurement; finally, the data recording is completed according to the stable display of the weight moment balance.

[0055] When measuring the weight moment of different stages of blades, the telescopic length of the telescopic rod 9 is adjusted according to the actual working radius of the blade, the position of the axial positioning ruler 17 is adjusted according to the axial width of the blade tenon, and the opening size between the upper positioning block 15 and the lower positioning block 19 is adjusted according to the size of the clamping part of the blade tenon. If the weight moment of blades with other different working radii needs to be measured, different lengths of telescopic rod sleeve components can be replaced according to the size of the working radius of the blade.

[0056] The universal blade weight moment measuring fixture of the present application can clamp blade tenons of different sizes by designing the clamping part to be movable and retractable. The blade tenon is guaranteed to be perpendicular to the measuring arm of the fixture by the design of the blade tenon pressing structure, and the radial center line of the blade is guaranteed to coincide with the radial center line of the measuring arm by the design of the axial limiting structure of the blade tenon. The actual working state of the blade can be simulated during measurement, so that more accurate blade weight moment parameters can be measured. Since the actual working radii of different stages of blades are different, a telescopic structure is designed so that the length of the measuring arm can be changed, thereby simulating the working radii of blades of different lengths. In addition to measuring the weight moment of the first to sixth stage working blades of the low-pressure compressor, the fixture also has the ability to measure the weight moment of blades with other different working radii. The telescopic structure of the fixture can include multiple replaceable structures, thereby simulating a wider range of blade working radii.

[0057] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any changes or replacements within the technical scope disclosed in the present application can be easily thought of by those skilled in the art, and should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A universal blade weight moment measuring jig, characterized by, The utility model relates to a telescopic arm assembly and clamping mechanism assembly, including: Telescopic arm assembly (1), the telescopic arm assembly (1) includes base (3), sleeve (5), end cover (7), telescopic rod (9) and mounting plate (8), wherein, The base (3) is connected with the weight moment balance; One end of the sleeve (5) is connected with the base (3), and the inside of the sleeve (5) has a containing cavity, and the other end of the sleeve (5) is provided with a first opening communicated with the containing cavity; One end of the telescopic rod (9) is installed in the containing cavity from the first opening, and is connected with the sleeve (5) in cooperation with the end cover (7); The mounting plate (8) is installed at the other end of the telescopic rod (9); Clamping mechanism assembly (2), the clamping mechanism assembly (2) includes mounting seat (18), radial positioning block, axial positioning ruler (17), top tool screw rod (22), wherein, The mounting seat (18) is U-shaped, including upper mounting plate, lower mounting plate and back plate, the guide column (12) is installed between the upper mounting plate and the lower mounting plate, and the back plate is fixedly connected with the mounting plate (8); The radial positioning block includes upper positioning block (15) and lower positioning block (19), the upper positioning block (15) is sleeved on the guide column (12), and is connected with the upper mounting plate through upper positioning block screw rod and M5 slotted disc head positioning screw (23), the lower positioning block (19) is sleeved on the guide column (12), and is connected with the lower mounting plate through lower positioning block screw rod and M5 slotted disc head positioning screw (23); One end of the lower positioning block (19) is provided with a side plate (11), and the side plate (11) and the lower positioning block (19) form a plug-in slot; The axial positioning ruler (17) is L-shaped, is installed in the plug-in slot, and is positioned through the first M3 internal hexagonal screw (21) installed on the lower positioning block (19); The top tool screw rod (22) is installed on the back plate.

2. The universal blade weight moment measuring fixture of claim 1, wherein, One end of the sleeve (5) provided with the flange mounting edge is connected with the base (3), and the flange mounting edge is connected with the base (3) through the M5 internal hexagonal screw (4).

3. The universal blade weight moment measuring fixture of claim 2, wherein, The telescopic rod (9) is provided with a sliding groove, the end cover (7) is provided with a second opening, the second opening is provided with a boss, the end cover (7) is connected with the sleeve (5) through the second M3 internal hexagonal screw (10), and the boss is matched with the sliding groove.

4. The universal blade weight moment measuring fixture of claim 3, wherein, The telescopic rod (9) has multiple length specifications.

5. The universal blade weight moment measuring fixture of claim 4, wherein, M4 internal hexagonal screw (6) is installed on the side wall of the sleeve (5), when the position of the telescopic rod (9) is adjusted, the telescopic rod (9) is locked with the sleeve (5) through the M4 internal hexagonal screw (6).

6. The universal blade weight moment measuring fixture of claim 1, wherein, Two guide columns (12) are arranged in parallel.

7. The universal blade weight moment measuring fixture of claim 1, wherein, The mounting plate (8) is L-shaped, including first mounting plate and second mounting plate, the first mounting plate is fixedly connected with the telescopic rod (9); The back plate is vertically provided with a connecting plate, and the connecting plate is fixedly connected with the second mounting plate.

8. The universal blade weight moment measuring fixture of claim 1, wherein, The upper positioning block (15) comprises an upper fixed part and an upper clamping part, and the lower positioning block (19) comprises a lower fixed part and a lower clamping part, and the end of the upper clamping part and the lower clamping part is provided with an inclined surface facilitating blade tenon installation.

9. The universal blade weight moment measuring fixture of claim 1, wherein, Small knobs (13) are arranged on the upper positioning block screw and the lower positioning block screw.

10. The universal blade weight moment measuring fixture of claim 1, wherein, A large knob (16) is arranged on the top die screw (22).

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