A thrust torque dynamic calibration device based on thrust-torque combined load

Abstract

The present invention relates to a thrust torque dynamic calibration device based on a push-torque composite load, wherein a driving motor is connected to a test piece through a coupling, and the test piece is connected to a load motor through a high-precision standard torque sensor. A steady-state component is connected between the test piece and the high-precision standard torque sensor, and the steady-state component ensures the stability of the axial force under dynamic conditions; weight hanging plates are respectively connected to the connecting shafts at both ends of the steady-state component, and standard weights are stacked on the weight hanging plates to achieve force loading of the test piece through standard weights. The torque loading of the present invention is achieved by braking control of the load motor to achieve constant torque output and apply a certain damping to the test piece. Force loading is achieved through high-precision weights, and a steady-state component is used to ensure the stability of the thrust of the device during dynamic rotation. A rolling spline pair is used for the connection between the device and the high-precision standard torque sensor, which can reduce the influence of the axial force on the torque and achieve torque calibration of the test piece under dynamic conditions.

Description

Technical Field

[0001] The invention relates to a thrust torque dynamic calibration device under a thrust-torsion composite load, and in particular to a dynamic torque calibration device using a composite connection between a steady-state component and a rolling spline pair. Background Art

[0002] At present, the torque calibration of the measured part often adopts the static calibration method to obtain the calibration coefficient, which can no longer meet the technical requirements of actual use.

[0003] Regardless of the type of measured object, in actual use, there is a common situation of "static calibration and dynamic use", without fully considering the impact of factors such as jumping and friction of the measured object during rotation on the measurement results. Most of the measured objects need to keep rotating during actual use. The required calibration coefficient should be the dynamic calibration coefficient under the "rotation effect" in order to carry out effective and high-precision measurement data.

[0004] In order to further evaluate the accuracy and stability of the thrust torque test measurement results and deeply assess the corresponding measurement accuracy and reliability, it is necessary to further realize the (quasi) in-situ calibration of the torque of the measured object.

[0005] At present, there is no calibration device for simultaneous dynamic calibration of thrust and torque at home and abroad. Summary of the invention

[0006] The present invention aims to provide a thrust torque dynamic calibration device under thrust-torsion composite load, which adopts the composite use of steady-state components and rolling spline pairs in the process structure of converting standard weights into axial forces, as well as the dynamic calibration of torque.

[0007] The technical solution of the present invention is: a thrust and torque dynamic calibration device based on a push-torque composite load, comprising a driving motor, a loading weight, a steady-state component, a rolling spline pair, a high-precision standard torque sensor, a load motor, and a mounting base plate. The driving motor is connected to a test piece through a coupling to drive the test piece to rotate. The test piece is connected to the load motor through a high-precision standard torque sensor, and the load motor applies torque to the test piece. A steady-state component is connected between the test piece and the high-precision standard torque sensor, and the steady-state component ensures the stability of the axial force under dynamic conditions. Weight hanging plates are respectively connected to the connecting shafts at both ends of the steady-state component, and standard weights are stacked on the weight hanging plates to realize force loading of the test piece through standard weights, thereby realizing that the test piece is subjected to axial force and torque at the same time, and thrust and torque calibration is performed under dynamic conditions.

[0008] Furthermore, the steady-state component includes a bearing group consisting of a pair of self-aligning bearings and a bidirectional external self-aligning thrust ball bearing, a bearing seat and a transition shaft. The transition shaft is installed in the bearing seat through the bearing group. The bearing group is used to prevent the amount of runout from being transmitted to the bearing seat when the transition shaft runs.

[0009] Furthermore, a rolling linear guide is provided under the bearing seat, and the axial movement of the bearing seat is constrained by the rolling linear guide, which can ensure the stability of the standard weight.

[0010] Furthermore, the high-precision standard torque sensor is connected to the connecting shaft of the steady-state component by a rolling spline pair to eliminate the interference of the axial force on the torque.

[0011] Furthermore, the weight hanging plate is connected to the steel wire through the hanging groove rod, and the steel wire is fixed on the loading bearing seat to axially load the connecting shaft.

[0012] The beneficial effects of the present invention are:

[0013] 1) Steady-state components are used to ensure the stability of axial force under dynamic conditions; 2) The use of rolling spline pairs at the connection with high-precision standard torque sensors can eliminate the interference of axial force on torque; 3) High-precision standard torque sensors can dynamically calibrate the torque of the test piece; 4) When the test piece has actual torque requirements, it is required to evaluate the accuracy and stability of the torque of the test piece under the action of axial force, and deeply evaluate the corresponding measurement accuracy and reliability, so as to further realize the (quasi) in-situ calibration of the torque of the test piece. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of a thrust torque dynamic calibration device under a thrust-torsion composite load according to the present invention;

[0015] Figure 2 It is a cross-sectional view of the steady-state component structure;

[0016] Figure 3 It is a side view of the steady-state component structure. DETAILED DESCRIPTION

[0017] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0018] like Figures 1 to 3 As shown, the thrust torque dynamic calibration device under a push-torque combined load of the present invention includes a drive motor 1, a test piece 2, a mounting base 3, a loading weight 4, a steady-state component 5, a rolling spline pair 6, a high-precision standard torque sensor 7, and a load motor 8.

[0019] The driving motor 1 is connected to the test piece 2 through a coupling, and is used to drive the test piece 2 to rotate. The test piece 2 is connected to one end of the steady-state component 5 through a connecting shaft, and the other end of the steady-state component 5 is connected to the rolling spline pair 6 through a connecting shaft and a coupling. The rolling spline pair 6 is connected to the load motor 8 through a high-precision standard torque sensor 7. The transition shafts at both ends of the steady-state component 5 are respectively connected to weight hanging plates, and the loading weights 4 are stacked on the weight hanging plates.

[0020] The torque loading of the measured object is achieved through the braking control of the load motor to achieve constant torque output and apply a certain damping to the measured object. The force loading of the measured object is achieved through standard weights. At the same time, on this basis, a steady-state component is used to ensure the thrust stability of the calibration device during dynamic rotation. The connection with the high-precision standard torque sensor adopts a rolling spline pair to reduce the influence of axial force on torque, so that the measured object is subjected to axial force and torque at the same time, and thrust and torque are calibrated in a dynamic state.

[0021] The weight hanging plate is connected to the steel wire through the hanging groove rod, and the steel wire is fixed on the loading bearing seat to apply axial load to the connecting shaft.

[0022] like Figure 2 As shown in FIG. 3 , the steady-state assembly 5 includes a bearing group consisting of a pair of self-aligning bearings 5-1 and a bidirectional external self-aligning thrust ball bearing 5-2, a bearing seat 5-3, and a transition shaft 5-4. The transition shaft 5-4 is installed in the bearing seat 5-3 through the bearing group. The bearing group is used to ensure that when the transition shaft 5-4 jumps, the jump amount will not be transmitted to the bearing seat 5-3. The bearing seat 5-3 is connected to the bracket 5-6 through the rolling linear guide 5-5. The axial movement of the bearing seat 5-3 is constrained by the rolling linear guide 5-5, which can ensure the stability of the standard weight. When the measured piece moves slightly after being axially loaded, the axial movement of the bearing seat is constrained by the rolling linear guide and bears the axial slight movement.

[0023] When the measured object rotates, the transition shaft will produce vibration. A pair of self-aligning bearings and a bidirectional external self-aligning thrust ball bearing are used to form a bearing seat to ensure that the vibration of the transition shaft will not be transmitted to the bearing seat, thereby ensuring the stability of the axial force and the stability of the standard weight.

[0024] A rolling spline pair is used at the connection with the high-precision standard torque sensor to eliminate the interference of axial force on torque.

[0025] Torque calibration of the test piece:

[0026] T di =T i -T fi (1)

[0027] Where, T di ——Calibration value of the torque of the measured object at point i, Nm;

[0028] T i ——the indication value of the standard torque sensor at point i, Nm;

[0029] T fi ——Calibration value under the action of axial force at point i and at a certain speed, Nm.

Claims

1. A thrust torque dynamic calibration device based on thrust-torsion combined load, characterized in that: It includes a driving motor, a loading weight, a steady-state component, a rolling spline pair, a high-precision standard torque sensor, a load motor, and a mounting base plate. The driving motor is connected to the test piece through a coupling to drive the test piece to rotate. The test piece is connected to the load motor through a high-precision standard torque sensor, and the load motor applies torque to the test piece. A steady-state component is connected between the test piece and the high-precision standard torque sensor, and the steady-state component ensures the stability of the axial force under dynamic conditions; weight hanging plates are respectively connected to the connecting shafts at both ends of the steady-state component, and loading weights are stacked on the weight hanging plates to realize force loading of the test piece through the loading weights, thereby The measured part is subjected to axial force and torque at the same time, and thrust and torque are calibrated under dynamic state; the steady-state component includes a bearing group consisting of a pair of self-aligning bearings and a bidirectional external self-aligning thrust ball bearing, a bearing seat and a transition shaft, and the transition shaft is installed in the bearing seat through the bearing group, and the bearing group is used to prevent the transition shaft from jumping and transmitting to the bearing seat when the transition shaft jumps; the high-precision standard torque sensor and the connecting shaft of the steady-state component are connected by a rolling spline pair to eliminate the interference of axial force on torque; the weight hanging plate is connected to the steel wire through a hanging groove rod, and the steel wire is fixed on the bearing seat to axially load the connecting shaft.

2. The thrust torque dynamic calibration device based on thrust-torsion combined load according to claim 1 is characterized in that: A rolling linear guide is provided under the bearing seat, and the axial movement of the bearing seat is constrained by the rolling linear guide, which can ensure the stability of the standard weight.

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