Blade vibration test fixture controlled by hydraulic cylinder
The blade vibration test fixture controlled by a hydraulic cylinder solves the problems of cumbersome operation, low efficiency and poor versatility of existing fixtures, and realizes rapid and stable clamping and efficient testing of blades, thereby improving test accuracy and reducing costs.
Patent Information
- Application Number
- CN202423153755.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-20
- Publication Date
- 2025-11-07
- Estimated Expiration
- 2034-12-20
AI Technical Summary
Existing blade vibration testing fixtures are cumbersome to operate, inefficient, difficult to control clamping force precisely, and lack versatility, resulting in inaccurate test results and high costs.
The blade vibration test fixture, controlled by a hydraulic cylinder, precisely controls the clamping force through the cooperation of the hydraulic cylinder and the pressure detection device. The fixture plate structure is designed to be adjustable to accommodate blades of different shapes and sizes. It is combined with a force hammer impact device to perform vibration testing.
It achieves rapid, stable and precise clamping and fixing of blades, improves testing efficiency and accuracy, reduces testing costs and time costs, and has good versatility and flexibility.
Smart Images
Figure CN223525976U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of aviation compressor structure strength test, concretely relates to a vane vibration test fixture of hydraulic cylinder control. BACKGROUND
[0002] The aero-engine is the core component of the development of modern aviation industry, is the important index of measuring a country's aviation science and technology level, national defense strength and comprehensive national strength, is praised as the "bright pearl" on the "crown" of aviation industry. The compressor is one of the most important components of the aero-engine, in recent years, the compressor blade structure is developing towards high pressure ratio and high strength, the original aluminum alloy, titanium alloy and other materials can not meet the requirements, so that the new composite material is gradually applied to the production of blade structure. However, the different layering methods of composite material have a direct influence on the vibration frequency of blade structure, therefore, it is necessary to test the vibration frequency of the blade structure after layering. The traditional vane vibration test fixture often has many defects. For example, some fixtures use mechanical screw and other manual adjustment methods to fix the blade, this method is not only cumbersome and inefficient, but also difficult to accurately control the size and stability of the clamping force, and the uneven or unstable clamping force can easily lead to deviation of the test results. In addition, the structure design of some fixtures lacks universality, and the adaptability to different shapes and sizes of blades is poor. Whenever a new specification of blade needs to be tested, the fixture often needs to be greatly modified or redesigned and manufactured, which undoubtedly increases the test cost and time period, seriously restricts the efficiency improvement of blade research and production. Moreover, the existing vibration frequency test platform cannot ensure that the clamping force applied by the fixture to the blade tenon is consistent, and the fixture will loosen during the vibration process, so it is difficult to ensure the accuracy of the blade structure vibration frequency test. According to the above problems, the utility model provides a vane vibration test fixture controlled by hydraulic cylinder, which can ensure that the force applied by the hydraulic cylinder to the fixture plate is consistent through observing the pressure gauge value, and ensure that the fixture does not loosen during the test process. The fixture plate can be replaced according to the shape of the blade tenon to meet the vibration test of different blade structures. CONTENT OF THE UTILITY MODEL
[0003] The utility model provides a vane vibration test fixture controlled by hydraulic cylinder, through the accurate control of hydraulic cylinder, realizes the quick, stable and accurate clamping and fixing of blade, improves the test efficiency and result accuracy, has good universality at the same time, can adapt to the blade test demand of different shapes and sizes, effectively reduces the test cost and time cost.
[0004] In order to achieve the above object, the utility model discloses technical scheme is: a kind of hydraulic cylinder control's vane vibration test fixture, for vane vibration characteristic test, including support guiding device, hydraulic clamping device, pressure detection device and force hammer percussion device;The hydraulic clamping device is connected on support guiding device, and pressure detection device is connected with hydraulic clamping device;Force hammer percussion device is connected on support guiding device;Blade bottom is connected with tenon, and tenon is clamped and fixed on hydraulic clamping device;The blade is struck by force hammer percussion device and is tested by pressure detection device.
[0005] The support guiding device includes T-shaped support base, side cylinder support frame, L-shaped support frame, lower clamp plate, Z-direction groove guide rail and X-direction convex groove guide rail;The T-shaped support base is an integral structure composed of a horizontal straight plate and a vertical plate, the horizontal straight plate is connected to a hard ground, the L-shaped support frame is an integral structure composed of a vertical short straight plate and a horizontal long straight plate, the short straight plate of the L-shaped support frame is connected to the front side of the top end of the vertical plate of the T-shaped support base and is flush with the upper end, and the free end of the horizontal long straight plate of the L-shaped support frame is connected with the force hammer percussion device;The Z-direction groove guide rail is located below the L-shaped support frame and is connected to the vertical plate of the support base, and the side cylinder support frame is connected to the horizontal straight plate on the rear side of the vertical plate of the T-shaped support base;The lower clamp plate is a flat plate structure with a V-shaped groove at the middle part of the two ends, and the lower clamp plate is connected to the horizontal straight plate on the front side of the vertical plate of the T-shaped support base;The X-direction convex groove guide rail is connected to the flat plate on the rear side of the upper surface of the lower clamp plate;The hydraulic clamping device is connected with the side cylinder support frame and the L-shaped support frame respectively.
[0006] The hydraulic clamping device includes side hydraulic clamping mechanism and upper hydraulic clamping mechanism, the side hydraulic clamping mechanism is connected to the side cylinder support frame, the upper hydraulic clamping mechanism is connected to the L-shaped support frame, the side hydraulic clamping mechanism and the upper hydraulic clamping mechanism cooperate to form a containing space, and the tenon is placed in the containing space, and the side hydraulic clamping mechanism and the upper hydraulic clamping mechanism are connected with the pressure detection device respectively.
[0007] The tenon is a rectangular body with four flat surfaces, and the upper end and the lower end are V-shaped structures, the upper end V-shaped structure of the tenon is in contact with the upper hydraulic clamping mechanism, and the lower end V-shaped structure of the tenon is placed in the corresponding V-shaped structure of the lower clamp plate;The blade is vertically connected to the front end plane of the tenon, and the rear end plane of the tenon is in contact with the side hydraulic clamping mechanism.
[0008] The side hydraulic clamping mechanism comprises a side hydraulic cylinder, a side air inlet port, a side air outlet port, a side cylinder telescopic shaft and a side clamp plate, the hydraulic cylinder is horizontally installed on a side cylinder support frame, the side air inlet port is installed on one side of the side hydraulic cylinder, and the side air outlet port is installed on the other side of the side hydraulic cylinder; the bottom of the side clamp plate is provided with a groove, and the side clamp plate is connected with the X-direction groove guide rail through the groove arranged at the bottom; the side cylinder telescopic shaft at the front end of the side hydraulic cylinder is fixedly connected with one end of the side clamp plate through a threaded connection, and the other end of the side clamp plate is pushed by the side cylinder telescopic shaft and is tightly pressed on the rear end plane of the tenon; and the side air outlet port is connected with a pressure detection device.
[0009] The upper hydraulic clamping mechanism comprises an upper hydraulic cylinder, an upper air inlet port, an upper air outlet port, an upper cylinder telescopic shaft and an upper clamp plate; the upper hydraulic cylinder is connected to the horizontal long straight plate of the L-shaped support frame, the upper air inlet port is installed on the upper end of the upper hydraulic cylinder, the upper air outlet port is installed on the lower end of the upper hydraulic cylinder, and the upper air outlet port is connected with a pressure detection device; the upper clamp plate is a flat plate structure with a V-shaped groove at the middle part of the two ends, and the upper clamp plate is connected with the Z-direction groove guide rail through the boss arranged on the rear end face; the upper cylinder telescopic shaft passes through the horizontal long straight plate of the L-shaped support frame and is connected to the upper end of the upper clamp plate, and the upper cylinder telescopic shaft pushes the upper clamp plate to move up and down in the Z-direction groove guide rail and is tightly pressed on the upper end of the tenon.
[0010] The pressure detection device is composed of a pressure detector, a first rubber air pipe and a second rubber air pipe; one end of the first rubber air pipe is connected with the upper hydraulic clamping mechanism, the other end of the first rubber air pipe is connected with the pressure detector, one end of the second rubber air pipe is connected with the side hydraulic clamping mechanism, and the other end of the second rubber air pipe is connected with the pressure detector.
[0011] The force hammer striking device comprises a force hammer front arm, a force hammer rear arm and a rubber hammer head; one end of the force hammer rear arm is connected to the free end of the horizontal long straight plate of the L-shaped support frame, the other end of the force hammer rear arm is connected with the force hammer front arm, and the other end of the force hammer front arm is connected with the rubber hammer head.
[0012] The force hammer rear arm is a U-shaped groove structure, and limiting holes are uniformly and symmetrically arranged on the two sides of the U-shaped groove, the force hammer front arm is fixedly limited with the force hammer rear arm by being inserted into the limiting holes through limiting pins, and the force hammer front arm is normally vertically downward and can be rotated upward by 90 degrees around the limiting pins.
[0013] Advantageous effects:
[0014] 1. The utility model accurately controls the clamping force: through the cooperation of the hydraulic cylinder and the pressure detection device, the clamping force on the blade can be accurately set and controlled, the stability and reliability of the blade during the test process are guaranteed, and the accuracy of the test result is effectively improved.
[0015] 2, The utility model discloses operation efficient convenient: adopt the clamping and loosening action of hydraulic cylinder drive clamp, compared with traditional manual adjustment mode, operation is more simple and quick, and the installation and dismounting time of blade is greatly shortened, and test efficiency is improved.
[0016] 3, The utility model discloses good versatility: the structural design of clamp can adapt to the blade of different shape and size, just according to the specific specification of blade adjustment upper and lower clamp plate and the relative position of side clamp plate can, need not specially custom-made clamp, reduce test cost and time cost, improve the use flexibility and economy of clamp.
[0017] 4, The utility model discloses force hammer knock position accurate adjustment: with the design of limit pin and limit hole, can accurately control the position of force hammer forearm knock blade surface, satisfies the demand of different test points, provides powerful guarantee for the comprehensive and accurate test of blade vibration characteristic.
[0018] The above description is only the summary of the technical scheme of the utility model, in order to more clearly understand the technical means of the utility model, and can be implemented according to the content of the specification, the following detailed description of the preferred embodiments of the utility model and cooperate with the drawings as follows. BRIEF DESCRIPTION OF DRAWINGS
[0019] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, the following will briefly introduce the drawings needed in the embodiments, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to these drawings without creative labor.
[0020] Figure 1 It is the whole structure schematic diagram of the utility model;
[0021] Figure 2 It is the structure schematic diagram of the utility model T type support base axle side;
[0022] Figure 3 It is the main view of part T type support base of the utility model;
[0023] Figure 4 It is the structure schematic diagram of part L type support frame and force hammer device of the utility model;
[0024] Figure 5 It is the tenon blade connection schematic diagram of the utility model.
[0025] In the figure: 1, T-shaped support base; 2, side hydraulic cylinder; 21, side air inlet port; 22, side air outlet port; 23, side cylinder telescopic shaft; 24, side cylinder support frame; 3, lower clamp plate; 4, side clamp plate; 5, Z-direction groove guide rail; 6, L-shaped support frame; 7, upper hydraulic cylinder; 71, upper air inlet port; 72, upper air outlet port; 73, upper cylinder telescopic shaft; 8, upper clamp plate; 9, tenon; 10, blade; 110, force hammer forearm; 111, limit pin; 112, limit hole; 113, rubber hammer head; 114, force hammer rear arm; 12, pressure detection instrument; 121, first rubber air pipe; 122, second rubber air pipe; 13, X-direction convex groove guide rail. DETAILED DESCRIPTION
[0026] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.
[0027] Embodiment:
[0028] According to Figures 1-5 The utility model discloses a kind of blade vibration test fixtures controlled by hydraulic cylinder, after being fixed accurately to blade 10 by the fixture, the knocking of force hammer is accepted to carry out vibration characteristic test;The utility model includes support guiding device, hydraulic clamping device, pressure detection device and force hammer knocking device;The hydraulic clamping device is connected on support guiding device, and pressure detection device is connected with hydraulic clamping device;Force hammer knocking device is connected on support guiding device;Blade 10 bottom is connected with tenon 9, and tenon 9 is clamped and fixed on hydraulic clamping device;The blade 10 is knocked by force hammer knocking device, and is tested by pressure detection device.
[0029] Further, as shown in Figure 1 , Figure 2 and Figure 3As shown, the support guide device comprises a T-shaped support base 1, a side cylinder support frame 24, an L-shaped support frame 6, a lower clamp plate 3, a Z-direction groove guide rail 5 and an X-direction convex groove guide rail 13; the T-shaped support base 1 provides stable basic support for the whole clamp, ensures that displacement or shaking does not occur in the test process due to external vibration or stress, guarantees the accuracy and reliability of the test, the T-shaped support base 1 is an integral structure composed of a horizontal straight plate and a vertical plate, and the horizontal straight plate is fixedly connected on the hard ground by anchor bolts; the L-shaped support frame 6 is fixedly installed at the top end of the T-shaped support base 1 by bolts, provides an installation base and a support structure for the upper hydraulic cylinder 7, ensures the stability and reliability of the upper hydraulic cylinder 7 in the working process, so that the upper hydraulic cylinder 7 can effectively drive the upper clamp plate 8 to move up and down; the L-shaped support frame 6 is an integral structure composed of a vertical short straight plate and a horizontal long straight plate, the short straight plate of the L-shaped support frame 6 is connected to the front side of the top end of the vertical plate of the T-shaped support base 1 and flush with the upper end, and the free end of the horizontal long straight plate of the L-shaped support frame 6 is connected with a hammer knocking device; the Z-direction groove guide rail 5 is located below the L-shaped support frame 6 and connected to the vertical plate of the support base 1, and the side cylinder support frame 24 is connected to the horizontal straight plate on the rear side of the vertical plate of the T-shaped support base 1; the lower clamp plate 3 is a flat plate structure with a V-shaped groove at the middle part of the two ends of the plate, can preliminarily position and support the blade, and cooperates with the upper clamp plate 8 to realize the up and down clamping of the tenon part of the blade; the lower clamp plate 3 is connected to the horizontal straight plate on the front side of the vertical plate of the T-shaped support base 1; the X-direction convex groove guide rail 13 is connected to the plate on the rear side of the upper surface of the lower clamp plate 3, provides guidance and limiting for the lateral movement of the side clamp plate 4, guarantees the stability and accuracy of the side clamp plate 4 in the moving process, so that the side clamp plate 4 can accurately clamp the side of the blade tenon 9; the hydraulic clamping device is connected with the side cylinder support frame 24 and the L-shaped support frame 6 respectively. The side of the upper clamp plate 8 close to the Z-direction groove guide rail 5 moves up and down on the groove guide rail 5 under the guidance of the Z-direction groove guide rail 5 and the driving of the upper cylinder extension shaft 73, and cooperates with the lower clamp plate 3 to clamp the tenon 9.
[0030] Further, the hydraulic clamping device comprises a side hydraulic clamping mechanism and an upper hydraulic clamping mechanism, the side hydraulic clamping mechanism is connected to the side cylinder support frame 24, and the upper hydraulic clamping mechanism is connected to the L-shaped support frame 6; the side hydraulic clamping mechanism and the upper hydraulic clamping mechanism cooperate to form a containing space, and the tenon 9 is placed in the containing space; the side hydraulic clamping mechanism and the upper hydraulic clamping mechanism are respectively connected with the pressure detection device.
[0031] Further, as shown in the drawings, Figure 5As shown, the tenon 9 is a rectangular body with four flat surfaces, V-shaped upper end and lower end, the upper end V-shaped structure of the tenon 9 is in contact with the upper hydraulic clamping device; the lower end V-shaped structure of the tenon 9 is placed in the corresponding V-shaped structure of the lower clamp plate 3; the blade 10 is vertically connected to the front end plane of the tenon 9; the rear end plane of the tenon 9 is in contact with the side hydraulic clamping device. The tenon 9 is the part of the blade and the clamp for connection and fixation, and the positioning and clamping of the blade in the clamp are realized through the cooperation of the lower clamp plate 3 and the upper clamp plate 8, and the shape and size thereof are generally determined according to the overall design of the blade. The surface of the tenon 9 in contact with the blade 10 can also be appropriately designed according to the shape of the blade to improve the clamping effect and stability.
[0032] Further, as shown in Figure 2 and Figure 3 , the side hydraulic clamping mechanism includes a side hydraulic cylinder 2, a side air inlet port 21, a side air outlet port 22, a side cylinder telescopic shaft 23 and a side clamp plate 4, the hydraulic cylinder 2 is fixedly installed on the side cylinder support frame 24, the side air inlet port 21 is installed on one side of the side hydraulic cylinder 2, the side air outlet port 22 is installed on the other side of the side hydraulic cylinder 2, the bottom of the side clamp plate 4 is provided with a groove, the side clamp plate 4 is connected with the X-direction convex groove guide rail 13 through the groove provided at the bottom, the side cylinder telescopic shaft 23 at the front end of the side hydraulic cylinder 2 is fixedly connected with one end of the side clamp plate 4 through a threaded connection after penetrating through the vertical plate of the T-shaped support base 1; the other end of the side clamp plate 4 is pushed by the side cylinder telescopic shaft 23 to tightly press on the rear end plane of the tenon 9; the side air outlet port 22 is connected with the pressure detection device; by controlling the inflation of the side air inlet port 21 and the deflation of the side air outlet port 22, the side cylinder telescopic shaft 23 can accurately push the side clamp plate 4 to move along the X-direction convex groove guide rail 13, so as to realize the clamping and loosening action in the transverse direction of the tenon (9) connected with the blade 10, and the size of the clamping force can be accurately adjusted as needed; the side clamp plate 4 is connected with the X-direction convex groove guide rail 13 through the groove, and moves along the X-direction convex groove guide rail 13 under the drive of the side cylinder telescopic shaft 23, so as to clamp the blade tenon from the side, further enhance the fixing stability of the blade in the horizontal direction, and ensure that the blade does not displace in the transverse direction during the vibration test.
[0033] Further, as shown in Figure 1 and Figure 4As shown, the upper hydraulic clamping mechanism includes an upper hydraulic cylinder 7, an upper air inlet port 71, an upper air outlet port 72, an upper cylinder telescopic shaft 73 and an upper clamp plate 8; the upper hydraulic cylinder 7 is connected to the horizontal long straight plate of the L-shaped support frame 6, the upper air inlet port 71 is installed on the upper end of the upper hydraulic cylinder 7, the upper air outlet port 72 is installed on the lower end of the upper hydraulic cylinder 7, and the upper air outlet port 72 is connected with the pressure detection device; the upper clamp plate 8 is a flat plate structure with a V-shaped groove at the middle part of the two ends, and the upper clamp plate 8 is connected with the Z-direction groove guide rail 5 through the boss arranged on the rear end face; the upper cylinder telescopic shaft 73 passes through the horizontal long straight plate of the L-shaped support frame 6 and is connected to the upper end of the upper clamp plate 8, and the upper cylinder telescopic shaft 73 drives the upper clamp plate 8 to move up and down in the Z-direction groove guide rail 5 and press against the upper end of the tenon 9.
[0034] Further, as shown in Figure 1 and Figure 3 , the pressure detection device is composed of a pressure detector 12, a first rubber air pipe 121 and a second rubber air pipe 122; one end of the first rubber air pipe 121 is connected with the upper hydraulic clamping mechanism, the other end of the first rubber air pipe 121 is connected with the pressure detector 12, one end of the second rubber air pipe 122 is connected with the side hydraulic clamping mechanism, and the other end of the second rubber air pipe 122 is connected with the pressure detector 12; the pressure detector 12 is connected with the upper air outlet port 72 of the upper hydraulic clamping mechanism through the first rubber air pipe 121 and connected with the side air outlet port 22 of the side hydraulic clamping mechanism through the second rubber air pipe 122, for real-time monitoring of the pressure change in the upper hydraulic cylinder 7 and the side hydraulic cylinder 2, to ensure that the pressure detector 12 can accurately obtain the pressure information in the cylinder, thereby indirectly reflecting the clamping force on the blade 10, so as to ensure the stability and consistency of the clamping force during the test.
[0035] Further, as shown in Figure 4 , the force hammer striking device includes a force hammer front arm 110, a force hammer rear arm 114 and a rubber hammer head 113; one end of the force hammer rear arm 114 is connected to the free end of the horizontal long straight plate of the L-shaped support frame 6, the other end of the force hammer rear arm 114 is connected with the force hammer front arm 110, the force hammer rear arm 114 provides support and rotation basis for the force hammer front arm 110, to ensure that the force hammer front arm 110 can stably perform the striking operation; the other end of the force hammer front arm 110 is connected with the rubber hammer head 113, which has material properties capable of reducing damage to the surface of the blade when striking the blade, while effectively transmitting the striking force to excite the vibration of the blade.
[0036] Further, the force hammer rear arm 114 is a U-shaped groove structure, and limit holes 112 are uniformly and symmetrically arranged on both sides of the U-shaped groove, the force hammer front arm 110 is fixed in position by being inserted into the limit holes 112 through a limit pin 111, the normal position of the force hammer front arm 110 is vertically downward, and the force hammer front arm 110 can be rotated upward by 90 degrees around the limit pin 111. The limit pin 111 connects the force hammer front arm 110 and the force hammer rear arm 114, and the position of the limit pin 111 is adjusted through the limit holes 112 uniformly distributed on the force hammer rear arm 114, so that the position of the force hammer front arm 110 striking on the surface of the blade is accurately controlled, and the needs of different test points are met.
[0037] Further, the working principle of the utility model is as follows:
[0038] When the blade vibration test fixture controlled by the hydraulic cylinder is used, first, the lower end of the blade structure tenon 9 is placed in the V-shaped groove of the lower fixture plate 3, at this time, the upper hydraulic cylinder 7 is started, and the upper cylinder telescopic shaft 73 pushes the upper fixture plate 8 to move downward along the Z-direction groove guide rail 5 by starting to inflate the air inlet port 71 of the upper hydraulic cylinder 7, until the upper fixture plate 8 tightly fixes the tenon 9 structure in the V-shaped groove on the bottom surface of the upper fixture plate 8 and the top surface of the lower fixture plate 3, realizing the preliminary fixation of the blade tenon 9 in the upward and downward directions.
[0039] Then, the air inlet port 21 of the side hydraulic cylinder 2 is inflated, the side cylinder telescopic shaft 23 pushes the side fixture plate 4 to move along the X-direction convex groove guide rail 13, until the side fixture plate 4 is tightly pressed on the bottom end of the tenon structure, and the fixation of the blade in the horizontal direction is completed. During the whole clamping process, the pressure detection instrument 12 monitors the pressure of the upper hydraulic cylinder 7 and the side hydraulic cylinder 2 in real time through the rubber air pipes 121 and 122, ensures that the clamping force reaches the set requirement and remains stable, and the operator can make appropriate adjustment according to the reading of the pressure detection instrument 12.
[0040] After the blade is fixed, the position of the limit pin 111 is adjusted, and the position of the force hammer front arm 110 striking on the surface of the blade is accurately controlled through the limit hole 112; then the force hammer front arm 110 is lifted by hand, and when the force hammer front arm 110 cannot be moved, the force hammer front arm 110 is released, and the force hammer front arm 110 strikes on the surface of the blade to excite the blade vibration; in order to prevent the force hammer front arm 110 from stopping on the surface of the blade to hinder the vibration of the blade, the force hammer front arm 110 is controlled in time after striking, and thus, the preparation and excitation process of one blade vibration test by using the fixture is completed, and the vibration characteristics of the blade can be measured and analyzed through the corresponding vibration detection equipment.
[0041] Further, the working principle of the utility model is as follows:
[0042] 1. Installation preparation:
[0043] The T-shaped support base 1 is firmly installed on the horizontal and solid hard ground through the anchor bolt, and the installation position is stable and without shaking;
[0044] The L-shaped support frame 6 is accurately fixed and installed at the top end of the T-shaped support base 1 through the bolt, and the verticality and horizontality of the installation meet the requirements;
[0045] The Z-direction groove guide rail 5 is installed below the L-shaped support frame 6 and is fixedly connected with the T-shaped support base 1, the flatness and smoothness of the guide rail are checked, and it is ensured that the upper clamp plate 8 can move smoothly thereon;
[0046] The side cylinder support frame 24 is fixedly connected to one side of the bottom end of the T-shaped support base, the side hydraulic cylinder 2 is installed, and the side air inlet port 21 and the side air outlet port 22 are connected, the side cylinder telescopic shaft 23 passes through the T-shaped support base 1, and the connecting thread with the side clamp plate 4 is reserved;
[0047] The lower clamp plate 3 is fixedly connected to the other side of the bottom end of the T-shaped support base through the bolt, the X-direction convex groove guide rail 13 is installed, and the cooperation precision of the groove with the side clamp plate 4 is checked, so that the side clamp plate 4 can move stably thereon;
[0048] The upper hydraulic cylinder 7 is fixedly installed on the L-shaped support frame 6 through the bolt, the upper air inlet port 71 and the upper air outlet port 72 are connected, the upper cylinder telescopic shaft 73 passes through the L-shaped support frame 6, and the connecting thread with the upper clamp plate 8 is reserved;
[0049] The force hammer rear arm 114 is installed and fixedly connected to the front end of the L-shaped support frame 6, the force hammer front arm 110 is connected with the force hammer rear arm 114, the rubber hammer head 113 is installed at the other end of the force hammer front arm 110, and the limiting pin 111 and the limiting hole 112 are arranged;
[0050] One end of the rubber air pipe 121 is connected with the upper air inlet port 71, and the other end is connected with the pressure detector 12; the rubber air pipe 122 is connected with the side air inlet port 22 and is connected with the pressure detector 12, so that the pressure detector 12 can work normally and accurately monitor the cylinder pressure.
[0051] 2. Blade installation and clamping:
[0052] The tenon 9 at the lower end of the blade 10 to be tested is carefully placed in the V-shaped groove of the lower clamp plate 3, so as to preliminarily position it;
[0053] Start the upper hydraulic cylinder 7, control the slow inflation of the intake port 71, the upper cylinder telescopic shaft 73 pushes the upper clamp plate 8 to move down along the Z direction groove guide rail 5, pay close attention to the reading of the pressure detection instrument 12, when the reading reaches the clamping force value set for the blade, stop inflation, at this time the upper clamp plate 8 has clamped the tenon 9 in the V-shaped groove between the bottom surface of the upper clamp plate 8 and the top surface of the lower clamp plate 3;
[0054] Start the side hydraulic cylinder 2, inflate the intake port 21, the side cylinder telescopic shaft 23 pushes the side clamp plate 4 to move along the X direction convex groove guide rail 13, also according to the reading of the pressure detection instrument 12, when the side clamp plate 4 is completely pressed at the bottom end of the tenon 9 structure and the clamping force reaches the set value, stop inflation, complete the fixation of the blade in the clamp.
[0055] 3. Vibration test excitation:
[0056] According to the test requirements, adjust the position of the limiting pin 111 in the limiting hole 112 to determine the position of the hammer forearm 110 to knock the surface of the blade 10.
[0057] Slowly lift the hammer forearm 110 with your hand, make it rotate around the limiting pin 111, when it rotates to a certain angle, the hammer forearm 110 will be restricted from continuing to rotate by its own structure or other limiting devices, at this time keep the hammer forearm 110 in this position, quickly release the hammer forearm 110, under the action of gravity and elastic force, the rubber hammer head 113 knocks on the surface of the blade 10 to excite the vibration of the blade; almost at the same time as the knocking, quickly control the hammer forearm 110 with your hand to prevent it from stopping on the surface of the blade 10 due to rebound or other reasons and hindering the vibration of the blade.
[0058] 4. Post-test processing:
[0059] After completing the vibration test excitation, first measure and analyze the vibration characteristics of the blade 10, you can use laser displacement sensors, acceleration sensors and other equipment to collect and process data to obtain key parameters such as the vibration frequency and amplitude of the blade.
[0060] After the test is completed, sequentially deflate the side hydraulic cylinder 2 and the upper hydraulic cylinder 7 to loosen the blade tenon 9 from the side clamp plate 4 and the upper clamp plate 8, and carefully take out the blade 10.
[0061] Check and maintain the clamp, check whether each part is loose, worn or damaged, check the rubber hammer head 113, and replace it in time if necessary to ensure that the clamp can work normally and maintain good performance in the next use.
[0062] In the case of no conflict, the skilled in the art can combine the relevant technical features in each of the above examples according to the actual situation to achieve the corresponding technical effect, and specific to various combination cases will not be described here.
[0063] It should be noted that all directional indications, such as upper, lower, left, right, front, rear, etc., are only used to explain the relative position relationship, movement condition, etc. between the components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications will also change accordingly.
[0064] In addition, the description of "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the technical features or implying the number of the technical features indicated. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features.
[0065] The above is only the preferred embodiment of the present application, and the present application will not be limited to these embodiments shown in the present application, but will be consistent with the widest range of principles and novel characteristics disclosed in the present application. Any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present application still belongs to the scope of the technical scheme of the present application.
Claims
1. A hydraulic cylinder controlled vane vibration test fixture for testing the vibration characteristics of a vane (10), characterized by: It includes support guide device, hydraulic clamping device, pressure detection device and force hammer knocking device; the hydraulic clamping device is connected on the support guide device, the pressure detection device is connected with the hydraulic clamping device; the force hammer knocking device is connected on the support guide device; the blade (10) bottom is connected with the tenon (9), the tenon (9) is clamped and fixed on the hydraulic clamping device; the blade (10) is knocked by the force hammer knocking device and is tested by the pressure detection device.
2. The hydraulic cylinder controlled vane vibration test fixture of claim 1, wherein: The support guide device includes T-shaped support base (1), side cylinder support frame (24), L-shaped support frame (6), lower clamp plate (3), Z-direction groove guide rail (5) and X-direction convex groove guide rail (13); the T-shaped support base (1) is an integral structure composed of horizontal straight plate and vertical plate, the horizontal straight plate is connected on hard ground, the L-shaped support frame (6) is an integral structure composed of vertical short straight plate and horizontal long straight plate, the short straight plate of the L-shaped support frame (6) is connected on the front side of the top end of the vertical plate of the T-shaped support base (1) and is flush with the upper end, the free end of the horizontal long straight plate of the L-shaped support frame (6) is connected with the force hammer knocking device; the Z-direction groove guide rail (5) is located below the L-shaped support frame (6) and is connected on the vertical plate of the support base (1), the side cylinder support frame (24) is connected on the horizontal straight plate of the rear side of the vertical plate of the T-shaped support base (1); the lower clamp plate (3) is a plate structure with V-shaped groove in the middle part of the plate, the lower clamp plate (3) is connected on the horizontal straight plate of the front side of the vertical plate of the T-shaped support base (1); the X-direction convex groove guide rail (13) is connected on the plate of the rear side of the upper surface of the lower clamp plate (3); the hydraulic clamping device is connected with the side cylinder support frame (24) and the L-shaped support frame (6) respectively.
3. A hydraulic cylinder controlled vane vibration test fixture as claimed in claim 2, wherein: The hydraulic clamping device includes side hydraulic clamping mechanism and upper hydraulic clamping mechanism, the side hydraulic clamping mechanism is connected on the side cylinder support frame (24); the upper hydraulic clamping mechanism is connected on the L-shaped support frame (6), the side hydraulic clamping mechanism and the upper hydraulic clamping mechanism cooperate to form containing space, the tenon (9) is placed in the containing space; the side hydraulic clamping mechanism and the upper hydraulic clamping mechanism are connected with the pressure detection device respectively.
4. The hydraulic cylinder controlled vane vibration test fixture of claim 3, wherein: The tenon (9) is a rectangular body with four planes, the upper end and the lower end are V-shaped structures, the upper end V-shaped structure of the tenon (9) contacts with the upper hydraulic clamping device; the lower end V-shaped structure of the tenon (9) is placed in the corresponding V-shaped structure of the lower clamp plate (3); the blade (10) is vertically connected on the front end plane of the tenon (9); the rear end plane of the tenon (9) contacts with the side hydraulic clamping device.
5. The hydraulic cylinder controlled vane vibration test fixture of claim 3, wherein: The side hydraulic clamping mechanism comprises a side hydraulic cylinder (2), a side air inlet port (21), a side air outlet port (22), a side cylinder telescopic shaft (23) and a side clamp plate (4), the hydraulic cylinder (2) is horizontally installed on a side cylinder support frame (24), the side air inlet port (21) is installed on one side of the side hydraulic cylinder (2), and the side air outlet port (22) is installed on the other side of the side hydraulic cylinder (2); the bottom of the side clamp plate (4) is provided with a groove, and the side clamp plate (4) is connected with the X-direction convex groove guide rail (13) through the groove arranged at the bottom; the side cylinder telescopic shaft (23) at the front end of the side hydraulic cylinder (2) is fixedly connected with one end of the side clamp plate (4) through a threaded connection, the side cylinder telescopic shaft (23) pushes the other end of the side clamp plate (4) to be tightly pressed on the rear end plane of the tenon (9), and the side air outlet port (22) is connected with a pressure detection device.
6. The hydraulic cylinder controlled vane vibration test fixture of claim 3, wherein: The upper hydraulic clamping mechanism comprises an upper hydraulic cylinder (7), an upper air inlet port (71), an upper air outlet port (72), an upper cylinder telescopic shaft (73) and an upper clamp plate (8); the upper hydraulic cylinder (7) is connected to the horizontal long straight plate of the L-shaped support frame (6), the upper air inlet port (71) is installed on the upper end of the upper hydraulic cylinder (7), the upper air outlet port (72) is installed on the lower end of the upper hydraulic cylinder (7), and the upper air outlet port (72) is connected with a pressure detection device; the upper clamp plate (8) is a flat plate structure with a V-shaped groove at the middle part of the two ends, and the upper clamp plate (8) is connected with the Z-direction concave groove guide rail (5) through the boss arranged on the rear end face; the upper cylinder telescopic shaft (73) is connected to the upper end of the upper clamp plate (8) through the horizontal long straight plate of the L-shaped support frame (6), and the upper cylinder telescopic shaft (73) pushes the upper clamp plate (8) to move up and down in the Z-direction concave groove guide rail (5) and be tightly pressed on the upper end of the tenon (9).
7. The hydraulic cylinder controlled vane vibration test fixture of claim 3, wherein: The pressure detection device is composed of a pressure detector (12), a first rubber air pipe (121) and a second rubber air pipe (122); one end of the first rubber air pipe (121) is connected with the upper hydraulic clamping mechanism, the other end of the first rubber air pipe (121) is connected with the pressure detector (12), one end of the second rubber air pipe (122) is connected with the side hydraulic clamping mechanism, and the other end of the second rubber air pipe (122) is connected with the pressure detector (12).
8. The hydraulic cylinder controlled vane vibration test fixture of claim 2, wherein: The force hammer striking device comprises a force hammer front arm (110), a force hammer rear arm (114) and a rubber hammer head (113); one end of the force hammer rear arm (114) is connected to the free end of the horizontal long straight plate of the L-shaped support frame (6), the other end of the force hammer rear arm (114) is connected with the force hammer front arm (110), and the other end of the force hammer front arm (110) is connected with the rubber hammer head (113).
9. A hydraulic cylinder controlled vane vibration test fixture as claimed in claim 8, wherein: The force hammer rear arm (114) is a U-shaped groove structure, and limit holes (112) are uniformly and symmetrically arranged on both sides of the U-shaped groove, the force hammer front arm (110) is fixed by a limit pin (111) inserted into the limit hole (112) and the force hammer rear arm (114), the normal position of the force hammer front arm (110) is vertically downward, and the force hammer front arm (110) can be rotated upward by 90 degrees around the limit pin (111).