Tool for testing rigidity, strength and fatigue of composite rotor

Abstract

The utility model relates to clamping and testing of a rotor made of a composite material, in particular to a tool for testing rigidity, strength and fatigue of a composite material rotor. A tool for testing rigidity, strength and fatigue of a composite rotor comprises a base, an inclined plane is arranged on the base, an assembly hole and a screw hole capable of being connected with a mandrel are formed in the position perpendicular to the inclined plane, the screw hole is provided with a screw, and a positioning rod is further installed on the base. A mandrel is mounted in the base assembly hole; external threads are formed in the outer wall of the upper part of the mandrel; the tool edge pressing rod is used for pressing a rotor blade, the pressing gasket is used for pressing a rotor, and the locking nut is matched with the external thread on the mandrel. According to the utility model, the observation results of three tests of rigidity, strength and fatigue of the rotor blade can be detected by using one tool, the problem that the composite material rotor is difficult to implement when the rigidity, strength and fatigue tests are carried out is solved, and a solution is provided for the rigidity, strength and fatigue tests of parts with similar structures.

Description

TECHNICAL FIELD

[0001] The utility model relates to the clamping and testing of a rotor of a certain composite material, in particular to a tool for rigidity, strength and fatigue test of a composite material rotor. BACKGROUND

[0002] The rotor is an important part of the power part of the underwater navigation equipment. The rotor made of composite material has the advantages of good corrosion resistance, low density, good fatigue resistance and small thermal expansion coefficient. The rotor made of composite material is formed by winding and gluing the blade and the base body.

[0003] According to the characteristics of the above rotor processing technology, the strain on the surface of the blade, the displacement of the middle part of the blade and the residual deformation of the gluing part of the blade and the base body cannot be known after the blade is subjected to pressure. If the blade or the gluing part has a problem in the working state, it will inevitably have a serious adverse effect on the power function of the underwater navigation equipment. In order to master this situation, the rigidity, strength and fatigue test of the composite material rotor must be carried out.

[0004] However, due to the particularity of the structure of the rotor, it is expected to design a tool with efficiency and cost performance to meet the above three test requirements. CONTENT OF THE UTILITY MODEL

[0005] The utility model discloses to solve the technical problem that the rigidity, strength and fatigue test of the composite material rotor is carried out at present, and lack of a general tool, and provides a tool for rigidity, strength and fatigue test of a composite material rotor.

[0006] The utility model discloses the following technical scheme is adopted: a tool for rigidity, strength and fatigue test of a composite material rotor, the tool includes the base, is equipped with the mandrel in the assembly hole of base opening and installs, the outer thread is opened to the outer wall of mandrel upper portion, the screw hole that can communicate mandrel is opened on the base and is equipped with the screw, the base still installs the locating bar, still include the knife edge pressure lever for pressing the rotor blade, the pressure washer and lock nut for pressing the rotor, and the lock nut is cooperated with the outer thread on the mandrel.

[0007] Before rigidity, strength and fatigue test of the composite material rotor, the rotor is installed on the mandrel, and the locating bar is used for realizing the positioning (blocking the rotor blade) of the rotor, and the screw completely locks the mandrel, and the pressure washer and the lock nut tightly press the rotor on the base, the knife edge pressure lever is installed on the main shaft of machine tool, and the rotor blade is pressed from top to bottom and pressure is applied, and the rigidity, strength and fatigue test of the rotor blade are carried out.

[0008] Further, the knife edge pressure lever includes a connecting section connected with the main shaft of machine tool, and a pressing section installed below the connecting section, and one side of the pressing section in contact with the rotor blade is designed as a curved surface consistent with the blade.

[0009] Further, the contact surface of the pressing section of the knife-edge presser with the rotor blade is designed according to the curved surface value of the middle part of the blade tip.

[0010] Further, the base comprises a base plate and a mounting boss on the upper surface of the base plate, the mounting boss is provided with an assembly hole and a mandrel is mounted in the assembly hole, and the positioning rod is fixed on the base plate.

[0011] Further, the top of the mounting boss is inclined, and the inclination angle can ensure that the posture of the rotor blade is to bear the vertical downward pressure of the knife-edge presser at the middle part of the blade tip.

[0012] Further, the screw holes are equidistantly arranged around the assembly hole on the mounting boss, and the mandrel comprises a middle shaft and a mounting circular platform surrounding the middle shaft, and screw holes are also arranged around the middle shaft on the mounting circular platform and correspond to the screw holes on the mounting boss.

[0013] Further, the base plate is rectangular.

[0014] Further, the mandrel and the locking nut are left-handed threadedly matched.

[0015] Further, the contact surfaces of the mandrel and the pressing washer with the rotor are knurled.

[0016] The utility model discloses the beneficial effects of:

[0017] (1) the rigidity, strength and fatigue test of the composite rotor part of the type can be implemented;

[0018] (2) the rotor blade rigidity, strength and fatigue three tests can be carried out using the tooling, and the cost performance is high;

[0019] (3) simple operation, convenient to use;

[0020] (4) simple structure, easy to process;

[0021] (5) the utility model is also suitable for the rigidity, strength and fatigue test of similar structural parts. DRAWINGS

[0022] Figure 1 The utility model discloses the three-dimensional structure schematic diagram when application.

[0023] Figure 2 The utility model discloses the side structure schematic diagram when application.

[0024] Figure 3 The knife-edge presser structure schematic diagram one.

[0025] Figure 4 The knife-edge presser structure schematic diagram two.

[0026] 1-rotor, 2-core shaft, 3-screw, 4-base, 5-positioning rod, 6-knife edge pressing rod, 7-pressing washer, 8-locking nut. DETAILED DESCRIPTION

[0027] The utility model discloses a kind of tooling for detecting the stiffness, strength and fatigue test of rotor blade, solve the problem difficult to implement when composite rotor is carried out stiffness, strength and fatigue test, provide a kind of solution for the stiffness, strength and fatigue test of similar structure component.

[0028] Example 1, a kind of tooling for stiffness, strength and fatigue test of composite rotor, the tooling includes base 4, base 4 has boss inclined surface, assembly hole is opened in the inclined surface, and is equipped with core shaft 2, outer thread is opened on the outer wall of the upper portion of core shaft 2;Screw hole that can be connected with core shaft 2 is opened on base 4 and is equipped with screw 3, positioning rod 5 is also installed on base 4;It also includes knife edge pressing rod 6 (for transmitting machine tool load) for pressing rotor blade, pressing washer 7 and locking nut 8 for pressing rotor 1, locking nut 8 is matched with the outer thread on core shaft 2.The knife edge pressing rod 6 includes the connecting section connected with the main shaft of vertical machine tool, and the pressing section (generally inverted T type) installed below the connecting section;The side of pressing section contacting rotor blade is designed as the curved surface consistent with blade;Specifically, the side of the pressing section of knife edge pressing rod 6 contacting rotor blade is designed according to the curved surface value of the middle part of blade tip.For different shapes of rotor blade, the knife edge pressing rod 6 matched with it can be replaced.

[0029] Example 2, the base 4 includes bottom plate and mounting boss on the upper surface of bottom plate, the mounting boss assembly hole is equipped with core shaft 2, and the positioning rod 5 is fixed on the bottom plate;The top of mounting boss is inclined surface, and the inclination angle can ensure that the posture of rotor blade is to bear the vertical downward pressure of knife edge pressing rod 6 with the middle part of its blade tip, the screw hole is equidistantly opened on the mounting boss around assembly hole, and the core shaft 2 includes middle shaft and mounting circular platform around middle shaft, and the screw hole is also opened on the mounting circular platform around middle shaft and corresponds to the screw hole on the mounting boss one by one, and the bottom plate is rectangular.

[0030] Example 3, the core shaft 2 and locking nut 8 are left-handed thread cooperation;The contact surface of core shaft 2, pressing washer 7 and rotor is opened with knurling.

[0031] The utility model makes further explanation in combination with drawings.

[0032] First, the design principle of the utility model, the tooling is mainly composed of core shaft 2, screw 3, base 4, positioning rod 5, knife edge pressing rod 6, pressing washer 7 and locking nut 8, see attached Figure 1The base 4 provides a test fastening platform, and the slope angle thereof can ensure that the blade posture is subjected to the vertical downward pressure of the cutting edge pressure rod at the middle of the blade tip, see the attached Figure 2 ; for the rotor blade shape being a spatial curved surface, the surface of the cutting edge pressure rod contacting the rotor blade is designed as a curved surface consistent with the blade, so that the middle of the blade tip of the rotor blade can be closely attached to the cutting edge part of the cutting edge pressure rod when the rotor blade is subjected to pressure, and local stress is avoided; the screw 3 fixes the mandrel 2 on the base 4; the positioning rod 5 is used for positioning the blade position; the compression washer 7 and the locking nut 8 fasten the rotor 1 with the appropriate position on the base 4; when the tool is used, in order to make the cutting edge pressure rod 6 perfectly attached to the middle of the blade tip, the rotor 1 is rotated to contact the positioning rod 5, and then the locking nut 8 is tightened, and the cutting edge pressure rod 6 is lowered to be perfectly attached. The cutting edge pressure rod 6 is used for transmitting pressure.

[0033] Second, the supplementary description of the utility model

[0034] (1) The contact surface of the cutting edge pressure rod 6 and the blade 1 is completely designed according to the curved surface value of the middle of the blade tip, see the attached Figure 3 and 4 .

[0035] (2) The bottom plate is designed as a rectangle, which is convenient for positioning and alignment when the tool is installed on the machine tool workbench.

[0036] (3) The mandrel 2 and the locking nut 8 should be left-handed thread cooperation, so as to avoid loosening of the blade in the test vibration process.

[0037] (4) The contact surface of the mandrel 2, the compression washer 7 and the rotor 1 should be knurled, so as to increase the friction force.

[0038] Third, the use instruction of the utility model

[0039] When the stiffness, strength and fatigue test is carried out, the rotor 1 is rotated to contact the positioning rod 5, the locking nut 8 is tightened, and the cutting edge pressure rod 6 is lowered to be perfectly attached. The cutting edge pressure rod 6 is subjected to the stepped pressure or pulse pressure downward, and whether there is a crack, relative displacement and whether the structure is deformed at the middle of each blade tip and the glued part is observed.

Claims

1. A tooling for composite rotor rigidity, strength and fatigue testing, characterized in that, The tool includes a base (4) with an assembly hole in which a mandrel (2) is installed, the outer wall of the upper part of the mandrel (2) is provided with external threads; the base (4) is provided with screw holes capable of fixing the mandrel (2) and is provided with screws (3), and the base (4) is further provided with a positioning rod (5); further including a knife edge pressing rod (6) for pressing the rotor blade, a pressing washer (7) for pressing the rotor (1), and a locking nut (8) cooperating with the external threads on the mandrel (2).

2. The rig for composite rotor stiffness, strength, and fatigue testing of claim 1, wherein, The knife edge pressing rod (6) includes a connecting section connected with the main shaft of the machine tool, and a pressing section installed below the connecting section; the surface of the pressing section contacting the rotor blade is designed as a curved surface consistent with the rotor blade.

3. The rig for composite rotor stiffness, strength, and fatigue testing of claim 2, wherein, The surface of the pressing section of the knife edge pressing rod (6) contacting the rotor blade is designed according to the curved surface value of the middle part of the blade tip.

4. The rig for composite rotor stiffness, strength, and fatigue testing of claim 3, wherein, The base (4) includes a bottom plate and a mounting boss on the upper surface of the bottom plate, the mounting boss is provided with an assembly hole in which a mandrel (2) is installed, and the positioning rod (5) is fixed on the bottom plate.

5. The rig for composite rotor stiffness, strength, and fatigue testing of claim 4, wherein, The top of the mounting boss is inclined, and the inclination angle can ensure that the posture of the rotor blade is to bear the vertical downward pressure of the knife edge pressing rod (6) at the middle part of the blade tip.

6. The rig for composite rotor stiffness, strength, and fatigue testing of claim 5, wherein, The screw holes are equidistantly arranged around the assembly hole on the mounting boss, and the mandrel (2) includes a middle shaft and a mounting circular platform surrounding the middle shaft, the screw holes are also arranged around the middle shaft on the mounting circular platform and correspond to the screw holes on the mounting circular platform one by one.

7. The rig for composite rotor stiffness, strength, and fatigue testing of claim 6, wherein, The bottom plate is rectangular.

8. The rig for composite rotor stiffness, strength and fatigue testing of any of claims 1-7, wherein, The mandrel (2) and the locking nut (8) are left-handed threadedly matched.

9. The rig for composite rotor stiffness, strength and fatigue testing of any of claims 1-7, wherein, The contact surfaces of the mandrel (2) and the pressing washer (7) with the rotor (1) are all knurled.

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