A rotor balance and method of calibration thereof

Abstract

The present application belongs to the field of rotor balance, especially a rotor balance and a calibration method thereof, aiming at the problem that the existing balance is interfered and coupled between each component in the loading direction, affecting the use effect, the present application proposes the following scheme, the rotor balance comprises a rotor shaft, a sleeve, a loading body, a swelling sleeve and a positioning key, the rotor shaft and the sleeve are connected into a whole through the positioning key, the sleeve is slidingly connected with the inner cavity of the loading body, and the top of the sleeve and the inner cavity of the loading body are tightly matched through the swelling sleeve, and the calibration method comprises the following steps: S1, fixing the rotor balance or the bar balance on the supporting device, and connecting the loading body to the free end of the balance; S2, arranging 12 force loading points on the loading body, and exerting the pre-programmed load on the force points through 12 load actuators, the present application accurately loads in the loading direction, and reduces the interference and coupling between each component.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of rotor balance, in particular to a rotor balance and a calibration method thereof. BACKGROUND

[0002] A balance, a kind of weighing instrument. By fulcrum (shaft) in the center of beam support balance beam and form two arms, each arm hangs a disc, one of the disc is placed in the known mass of object, another disc is placed in the object to be measured, the deflection of pointer fixed on the beam when not swing and point to the middle scale just indicates the mass of object to be measured. Balance is a kind of equal-arm lever. Balance is a kind of weighing instrument, is the instrument for measuring the mass of object. It is made according to the principle of lever, there is a small disc on the two ends of lever, one end is placed in the weight, the other end is placed in the object to be weighed, the central part of lever is equipped with a pointer, when the two ends are balanced, the mass (weight) of the two ends is equal. Modern balance, more and more precise, more and more sensitive, and more and more kinds.

[0003] The existing balance is mutually interfered and coupled between each component in loading direction, which influences use effect, so a rotor balance and a calibration method thereof are provided to solve the above problems. SUMMARY

[0004] The present application aims at solving the shortcomings of the prior art that the balance is mutually interfered and coupled between each component in loading direction, which influences use effect, and provides a rotor balance and a calibration method thereof.

[0005] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme:

[0006] A rotor balance, comprising a rotor shaft, a sleeve, a loading body, a swelling sleeve and a positioning key, the rotor shaft and the sleeve are connected into a whole through the positioning key, the sleeve is slidably connected with the inner cavity of the loading body, and the top of the sleeve is tightly matched with the inner cavity of the loading body through the swelling sleeve.

[0007] The present application further provides a calibration method of the rotor balance, comprising the following steps:

[0008] S1, fixing the rotor balance or rod balance on a support device, and connecting the free end of the balance with the loading body;

[0009] S2, arranging 12 force loading points on the loading body, and exerting pre-programmed load on the force loading points through 12 load actuators;

[0010] S3, the exerted load can be transmitted to the rotor balance through the swelling sleeve and the sleeve, so as to realize the calibration of the rotor balance.

[0011] Preferably, the load covers six dimensions of the balance, i.e. 3 forces and 3 moments.

[0012] Preferably, four loading beams are arranged on the upper part of the loading body, and loading points are arranged in the vertical direction at the ends of the loading beams to realize the loading of normal force, pitch moment and roll moment.

[0013] Preferably, four loading points are arranged in the middle part of the loading body to realize the loading of lateral force and resistance.

[0014] Preferably, two loading beams are arranged on the lower part of the loading body, and loading points are arranged in the horizontal direction at the ends of the loading beams to realize the loading of torque.

[0015] Preferably, the loading body is welded by a loading cylinder and a loading beam.

[0016] Preferably, the loading cylinder is integrally processed by high-strength steel, and the loading beam is processed by an I-shaped steel.

[0017] In the present application, the rotor balance and the calibration method have the following beneficial effects:

[0018] The rotor shaft and the sleeve are connected as a whole by a positioning key, the sleeve can be slidingly connected in the inner cavity of the loading body, the head of the sleeve and the inner cavity of the main loading body are tightly connected by an expansion sleeve, the expansion sleeve can realize large torque transmission, and the load applied by the force source to the main loading body can be transmitted to the rotor balance through the expansion sleeve and the sleeve.

[0019] The present application accurately loads in the loading direction, and reduces the mutual interference coupling between components. DETAILED DESCRIPTION

[0020] Figure 1 A structural schematic diagram of a rotor balance is provided for the present application.

[0021] Figure 2 A force system layout diagram of a rotor balance is provided for the present application.

[0022] In the figure: 1, rotor shaft; 2, sleeve; 3, loading body; 4, expansion sleeve; 5, rotor balance system. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments.

[0024] Reference Figures 1-2 A rotor balance includes a rotor shaft 1, a sleeve 2, a loading body 3, an expansion sleeve 4, and a positioning key. The rotor shaft 1 and the sleeve 2 are connected as a whole by the positioning key, the sleeve 2 is slidingly connected with the inner cavity of the loading body 3, and the top of the sleeve 2 and the inner cavity of the loading body 3 are tightly connected by the expansion sleeve 4.

[0025] A calibration method of a rotor balance, comprising the following steps:

[0026] S1, fixing the rotor balance or the bar balance on a support device, and connecting a loading body to the free end of the balance;

[0027] S2, arranging 12 force loading points on the loading body, and applying pre-programmed loads on the force loading points through 12 load actuators;

[0028] S3, the applied loads can be transmitted to the rotor balance through the expansion sleeve and the sleeve, so as to realize the calibration of the rotor balance.

[0029] In the embodiment, the loads cover six dimensions of the balance, i.e. three forces and three moments.

[0030] In the embodiment, four loading beams are arranged on the upper part of the loading body, and loading points are arranged in the vertical direction at the ends of the loading beams to realize the loading of the normal force, the pitching moment and the rolling moment.

[0031] In the embodiment, four loading points are arranged in the middle part of the loading body to realize the loading of the lateral force and the resistance.

[0032] In the embodiment, two loading beams are arranged on the lower part of the loading body, and loading points are arranged in the horizontal direction at the ends of the loading beams to realize the loading of the torque.

[0033] In the embodiment, the loading body is welded by a loading cylinder and a loading beam.

[0034] In the embodiment, the loading cylinder is integrally processed by high-strength steel, and the loading beam is processed by an I-shaped steel.

[0035] The balance loading device is mainly used for loading the rotor balance and the bar balance, so as to obtain the relationship matrix between the balance strain signal and the load. The working principle is that the rotor balance or the bar balance is fixed on the support device, the free end of the balance is connected to the loading body, and 12 force loading points are arranged on the loading body. Pre-programmed loads are applied on the force loading points through 12 load actuators, and the load conditions cover six dimensions of the balance, i.e. three forces and three moments. The frame is used for supporting and fixing the load actuator.

[0036] The balance loading device mainly comprises a frame, a loading body, a load actuator, a bar balance support seat, a force transmission device, a hydraulic system, a loading deformation measuring device, and the like. The length, width and height of the balance loading device are 12800mm x 12200mm x 9033mm.

[0037] The calibration state switching between the rotor balance and the torque balance; when the upper and lower sleeves are locked and the rotor balance fastening screw is locked, the combined loading of the rotor balance and the torque balance is carried out; when the rotor balance fastening screw is locked, the sleeves are loosened and removed, the single loading of the rotor balance is carried out; when the rotor balance screw is loosened and the upper and lower sleeves are locked, the single loading of the torque balance is carried out;

[0038] The rotor balance loading body can realize the single loading and combined loading of the rotor balance (six components) and the torque balance. The loading body is composed of a main loading body, a sleeve and a sleeve. The rotor main shaft and the sleeve are connected into a whole by a positioning key, the sleeve can be slidably matched in the inner cavity of the loading body, the sleeve head and the inner cavity of the main loading body are matched without gap by the sleeve, and the sleeve can realize large torque transmission. The load applied by the force source to the main loading body can be transmitted to the rotor balance through the sleeve and the sleeve, so as to realize the calibration of the rotor balance.

[0039] Four loading beams are arranged on the upper part of the loading body, and loading points are arranged in the vertical direction at the ends of the loading beams to realize the loading of the normal force, the pitching moment and the rolling moment; four loading points are arranged in the middle part to realize the loading of the lateral force and the resistance; two loading beams are arranged on the lower part, and loading points are arranged in the horizontal direction at the ends of the loading beams to realize the loading of the torque.

[0040] The main loading body is welded by a loading cylinder and a loading beam, the loading cylinder is integrally machined by high-strength steel, and the loading beam is machined by an I-shaped steel. In order to realize the accurate loading of the rotor balance in the loading direction and reduce the mutual interference coupling between the components, the loading body needs to have sufficient rigidity and reduce deformation when loading, and the weight of the rotor balance is about 4.6 tons.

[0041] The force system layout of the rotor balance loading body

[0042] In order to improve the calibration accuracy of the force measuring system and reduce the interference between the components of the force measuring sensor, the calibration device adopts the centralized loading mode to calibrate the balance.

[0043] The force system layout of the rotor balance loading body is shown in Figure 2

[0044] The functions of each loading point are as follows:

[0045] G1, G2, G3 and G4 realize the loading of the normal force Y;

[0046] G1 and G2 realize the loading of the pitching moment Mz;

[0047] G3 and G4 realize the loading of the rolling moment Mx;

[0048] G5 and G6 realize the loading of the resistance X;

[0049] G7 and G8 realize the loading of the lateral force Z;​

[0050] G9, G11, (or G10, G12) realize the loading of yaw moment My.

[0051] Force arm LMz = 3000 mm; LMx = 3000 mm; LMy = 2000 mm;

[0052] The design load of each loading point can be calculated from the load system load design index and the layout of the loading point.

[0053] (1) 1, 2, 3, 4 loading point load calculation

[0054] 1, 2, 3, 4 loading points are used to apply normal force, pitch moment, roll moment;

[0055] Under the action of lift Y, F1+F2+F3+F4 = 300KN F1 = F2 = F3 = F4 = 75KN;

[0056] Under the action of pitch moment Mz, F1x1.5 = 200KNm F1 = F2 = 134KN;

[0057] Under the action of roll moment Mx, F3x1.5 = 200KNm F3 = F4 = 134KN;

[0058] It can be concluded that F1 = F2 = F3 = F4 = 209KN;

[0059] (2) 5, 6, 7, 8 loading point load calculation

[0060] 5, 6 loading points are used to apply resistance, 7, 8 loading points are used to apply side force;

[0061] F5 = F6 = F7 = F8 = 100KN;

[0062] (3) 9, 10, 11, 12 loading point load calculation

[0063] 9, 10, 11, 12 loading points are used to apply yaw moment;

[0064] LMy = 1000 mm;

[0065] Under the action of yaw moment My, F9x1 + F11x1 = 75KNm F9 = F11 = 37.5KN;

[0066] F10 = F12 = 37.5KN;

[0067] Rotor balance loading body load of each loading point

[0068]

[0069]

[0070] The above description is only the preferred embodiment of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can make equivalent substitutions or changes according to the technical solution and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A calibration method for a rotor balance, characterized in that, The rotor balance includes a rotor shaft (1), a sleeve (2), a loading body (3), an expansion sleeve (4), and a positioning key. The rotor shaft (1) and the sleeve (2) are connected as a whole by the positioning key. The sleeve (2) is slidably connected to the inner cavity of the loading body (3). The top of the sleeve (2) and the inner cavity of the loading body (3) are tightly fitted by the expansion sleeve (4). Four loading beams are arranged on the upper part of the loading body, and loading points are arranged vertically at the ends of the loading beams to realize the loading of normal force, pitch moment, and roll moment. Two loading beams are arranged on the lower part of the loading body, and loading points are arranged horizontally at the ends of the loading beams to realize the loading of torque. The calibration method includes the following steps: S1. Fix the rotor balance or lever balance to the support device, and connect the free end of the balance to the loading body; S2. Twelve force application points are arranged on the loading body, and a pre-programmed load is applied to the force application points through twelve load actuation devices. S3. The applied load can be transferred to the rotor balance through the expansion sleeve and sleeve to achieve rotor balance calibration.

2. The calibration method for a rotor balance according to claim 1, characterized in that, The loads cover the six dimensions of the balance, namely three forces and three moments.

3. The calibration method for a rotor balance according to claim 2, characterized in that, The loading body has four loading points arranged in the middle to achieve the loading of lateral force and resistance.

4. The calibration method for a rotor balance according to claim 3, characterized in that, The loading body is welded together from a loading cylinder and a loading beam.

5. The calibration method for a rotor balance according to claim 4, characterized in that, The loading cylinder is machined from a single piece of high-strength steel, and the loading beam is machined from I-beams.

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