Multi-specification cross spring bearing calibration device and calibration method

Abstract

The invention discloses a multi-specification cross spring bearing calibration device and a calibration method.The calibration device comprises a fixed support, a torsion support, a swing arm, a sensor and a lead screw sliding table, and the fixed support and the torsion support are coaxially provided with mounting holes used for mounting cross spring bearings; the torsion support can rotate relative to the fixed support by taking the center of the mounting hole as an axis; the swing arm is arranged on the torsion support and can drive the torsion support to rotate together, the sensor is used for measuring the rotation distance of the swing arm, and the lead screw sliding table is used for adjusting the position of the sensor; a slide way is arranged on the swing arm, a threading slide block is arranged on the slide way in a sliding mode, and a threading hole perpendicular to the swing arm is formed in the threading slide block and used for applying simulation thrust of the micro thruster. Various tension positions and torques can be provided, various calibration requirements are met, the calibration work efficiency is improved, and the task development cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of spacecraft micro-thruster measurement, and in particular to a calibration device and a calibration method for a multi-specification cross spring bearing. Background Art

[0002] The micro-thrusters in spacecraft have very small thrust, so extremely precise equipment is needed to calibrate and measure the thrust on the ground. The cross spring bearing is the core pivot for tiny thrust measurement, and its accuracy affects the accuracy of tiny thrust measurement. Before use, the cross spring bearing needs to be calibrated and tested.

[0003] At present, there are more and more new types of micro-thrusters, and the corresponding types of cross spring bearings of thrust measurement devices are increasing. The existing calibration devices can only calibrate cross spring bearings of a single specification. If other specifications of cross spring bearings need to be calibrated, additional calibration devices must be prepared, which increases costs. Summary of the invention

[0004] The present invention provides a calibration device and a calibration method for a cross spring bearing of multiple specifications, which can meet various calibration requirements, improve the calibration work efficiency, and reduce the task development cost.

[0005] The technical problem to be solved is that the existing calibration device can only calibrate a single specification cross spring bearing.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] The present invention discloses a cross spring bearing calibration device with multiple specifications, comprising a fixed support, a torsion support, a swing arm and a sensor, wherein the fixed support and the torsion support are provided with mounting holes for mounting the cross spring bearing coaxially, and the torsion support can rotate relative to the fixed support with the center of the mounting hole as the axis; the swing arm is arranged on the torsion support and can drive the torsion support to rotate together, and the sensor is used to measure the rotation distance of the swing arm;

[0008] The swing arm is provided with a slideway, a threading slider is slidably provided on the slideway, and the threading slider is provided with a threading hole perpendicular to the swing arm for applying a simulated thrust of the micro-thruster.

[0009] By adopting the above solution and setting a slide on the swing arm, it is possible to provide a variety of pulling positions and torques, meet a variety of calibration requirements, improve calibration work efficiency, and reduce task development costs.

[0010] The present invention provides a cross spring bearing calibration device for multiple specifications. Furthermore, three-jaw chucks are provided at the mounting holes of the fixed support and the torsion support for clamping the cross spring bearing.

[0011] By adopting the above scheme, the cross spring bearing calibration device can radially adjust the bearing hole size and adapt to cross spring bearings of various sizes and specifications.

[0012] The present invention provides a cross spring bearing calibration device for multiple specifications, further comprising a base, and the fixed support is installed on the base.

[0013] By adopting the above solution, the base is used to install the fixed support and the displacement sensor.

[0014] The present invention provides a calibration device for a cross spring bearing of multiple specifications. Further, the fixed support includes a column and a support plate fixed on one side of the column, the column is installed on a base, the support plate is arranged in two rows at intervals up and down, and the mounting hole is opened on the support plate; the torsion support is located between the two support plates.

[0015] The present invention provides a cross spring bearing calibration device for multiple specifications. Further, the swing arm is arranged on the upper part of the uppermost support plate, and the swing arm is connected to the insertion end of the torsion support.

[0016] The present invention provides a cross spring bearing calibration device for multiple specifications. Further, a fixing column is installed on the base, and the sensor is arranged on the fixing column.

[0017] The present invention provides a cross spring bearing calibration device for multiple specifications. Further, the fixed column and the torsion support are respectively arranged on two opposite sides of the column.

[0018] By adopting the above solution, the installation of the sensor is facilitated and the calibration operation is not affected.

[0019] The present invention provides a cross spring bearing calibration device with multiple specifications. Further, the fixed column is slidably matched with the base along the length direction of the fixed support through a screw slide to adjust the position of the sensor.

[0020] By adopting the above solution and adjusting the position of the sensor, the sensor is placed in an optimal measuring state to ensure measurement accuracy.

[0021] A calibration method comprises the following steps:

[0022] Step 1: Obtain the thrust F of the microthruster;

[0023] Step 2: Obtain the specification parameters of the cross spring bearing to be calibrated, including torsional stiffness TSR, size specifications, and maximum rotation angle A1;

[0024] Step 3: Determine the range of the torque T of the microthruster according to the formula T = TSR / A2, and take the rotation angle A2 in the range of 2 / 3A1 to A1 as the selection criterion;

[0025] Step 4: According to the formula T=F*L1, determine the arm distance L1 of the calibration device, slide the threading slider along the slideway to the position of the arm distance L1 and fix it;

[0026] Step 5: According to the formula L2 = s / tanA2, the installation position of the sensor is determined based on the principle that the swing arm rotation displacement does not exceed the sensor range, and the sensor is moved to the set position through the lead screw slide. s is the sensor range.

[0027] Step 6: Install the cross spring bearing to be calibrated on the fixed support and the torsion support, and fix the cross spring bearing with a three-jaw chuck;

[0028] Step 7: Apply the thrust F of the micro-thruster to the threading slider perpendicular to the threading hole axis of the swing arm to perform a calibration test on the cross spring bearing.

[0029] By adopting the above scheme, a calibration method is provided, which can quickly perform calibration tests on cross spring bearings of various specifications.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] 1. The present application provides a calibration device, which realizes the radial adjustment of the bearing hole size of the cross spring bearing calibration device, and is suitable for cross spring bearings of various sizes and specifications. At the same time, it can provide a variety of tension positions and torques to meet a variety of calibration requirements, improve the calibration work efficiency, and reduce the task development cost;

[0032] 2. The present application provides a calibration method that can quickly perform calibration tests on cross spring bearings of various specifications.

[0033] The present invention will be further described below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the structure of the present invention.

[0035] Reference numerals:

[0036] 1. Threading slider; 2. Swing arm; 3. Cross spring bearing; 4. Three-jaw chuck; 5. Torsion support; 6. Sensor; 7. Fixed support; 8. Base; 9. Screw slide. DETAILED DESCRIPTION

[0037] like Figure 1 As shown, the present invention discloses a calibration device and a calibration method for a cross spring bearing of multiple specifications.

[0038] Embodiment 1:

[0039] The calibration device includes a base 8, a fixed support 7, a torsion support 5, a swing arm 2 and a sensor 6. The fixed support 7 is installed on the base 8. The fixed support 7 and the torsion support 5 are coaxially provided with mounting holes for installing the cross spring bearing 3. The torsion support 5 can rotate relative to the fixed support 7 with the center of the mounting hole as the axis under the action of thrust; the swing arm 2 is fixedly connected to the torsion support 5, and can drive the torsion support 5 to rotate together under the action of thrust. The sensor 6 is installed on the base 8 and is used to measure the rotation distance of the swing arm 2; a slideway is provided on the swing arm 2 along its length direction, and a threading slider 1 is slidably provided on the slideway. The threading slider 1 can slide along the slideway and be fixed at a corresponding position. The threading slider 1 is used to apply the thrust of the micro-thruster.

[0040] A three-jaw chuck 4 is provided at the mounting holes of the fixed support 7 and the torsion support 5, wherein the three-jaw chuck 4 on the torsion support 5 is embedded in the torsion support 5, and the three-jaw chuck 4 is used to clamp the cross spring bearing 3. By installing the three-jaw chuck 4 on the fixed support 7 and the torsion support 5, the installation of cross spring bearings 3 of different sizes can be met, which has stronger adaptability and reduces costs.

[0041] The fixed support 7 includes a column and a support plate fixed on one side of the column. The column is fixedly mounted on the base 8. Two support plates are arranged at intervals up and down. A space for installing the torsion support 5 is formed between the two support plates. The mounting hole is opened on the support plate.

[0042] The swing arm 2 is provided with a middle hole coaxially arranged with the mounting hole, through which the cross spring bearing 3 is installed on the fixed support 7 and the torsion support 5 and is locked by the three-jaw chuck 4.

[0043] The swing arm 2 is arranged on the upper part of the uppermost support plate, and the swing arm 2 is fixedly connected to the insertion end of the torsion support 5.

[0044] The threading slider 1 includes a slider slidably set in the slideway, a fixing plate located on the top surface of the swing arm 2, and a screw threaded with the fixing plate. The threading slider 1 is provided with a threading hole perpendicular to the swing arm. The fixing plate and the slider are connected as a whole. The screw passes through the fixing plate and abuts against the swing arm 2. When the screw is loosened, the slider can slide along the slideway. When the screw is tightened, the fixing block is fixed on the slideway under the action of the abutting force. By setting the slideway on the swing arm 2, the threading slider 1 can be adjusted in the slideway, which can provide a variety of torques to meet the calibration of cross spring bearings 3 of multiple specifications.

[0045] A fixed column is installed on the base 8, and the sensor 6 is arranged on the fixed column. The fixed column and the torsion support 5 are respectively arranged on two opposite sides of the column. The fixed column is slidably matched with the base 8 along the length direction of the fixed support 7 through a screw slide 9.

[0046] Embodiment 2:

[0047] A calibration method comprises the following steps:

[0048] Step 1: Get the thrust F of the microthruster.

[0049] Step 2: Obtain the specification parameters of the cross spring bearing 3 to be calibrated, including torsional stiffness TSR, size specifications, and maximum rotation angle A1.

[0050] Step 3: According to the formula T=TSR / A2, the rotation angle A2 of the cross spring bearing 3 under the thrust is used; the range of the torque T of the micro-thruster is determined with the rotation angle A2 being within the range of 2 / 3A1 to A1 as the selection criterion, so as to effectively exert the performance of the cross spring bearing 3 and avoid damage to the cross spring bearing 3 caused by exceeding the maximum rotation angle A1.

[0051] Step 4: According to the formula T=F*L1, determine the arm distance L1 of the calibration device, slide the threading slider 1 along the slideway to the position of the arm distance L1 and fix it.

[0052] Step 5: According to the formula L2=s / tanA2, using the angle A2 selected above, and taking the rotation displacement of the swing arm 2 not exceeding the measuring range of the sensor 6 as the criterion, determine the installation position of the sensor 6, and move the sensor 6 to the set position through the lead screw slide 9, where s is the measuring range of the sensor;

[0053] Step 6: Install the cross spring bearing 3 to be calibrated on the fixed support 7 and the torsion support 5, and fix the cross spring bearing 3 using the three-jaw chuck 4.

[0054] Step 7: Apply the thrust F of the micro-thruster to the threading slider 1 perpendicular to the threading hole axis of the swing arm to perform a calibration test on the cross spring bearing 3.

[0055] The embodiments described above are merely descriptions of preferred implementation modes of the present invention and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A multi-specification cross spring bearing calibration device, characterized in that: The invention comprises a fixed support (7), a torsion support (5), a swing arm (2) and a sensor (6); the fixed support (7) and the torsion support (5) are provided with mounting holes for mounting a cross spring bearing (3) coaxially; the torsion support (5) can rotate relative to the fixed support (7) with the center of the mounting hole as the axis; the swing arm (2) is arranged on the torsion support (5) and can drive the torsion support (5) to rotate together; and the sensor (6) is used to measure the rotation distance of the swing arm (2); The swing arm (2) is provided with a slideway, a threading slider (1) is slidably provided on the slideway, and the threading slider (1) is used to apply a simulated thrust of a micro-thruster.

2. A multi-specification cross spring bearing calibration device according to claim 1, characterized in that: The mounting holes of the fixed support (7) and the torsion support (5) are both provided with three-jaw chucks (4) for clamping the cross spring bearing (3).

3. The multi-specification cross spring bearing calibration device according to claim 1, characterized in that: It also comprises a base (8), and the fixed support (7) is installed on the base (8).

4. A multi-specification cross spring bearing calibration device according to claim 3, characterized in that: The fixed support (7) comprises a column and a support plate fixed to one side of the column, the column is mounted on a base (8), two support plates are arranged at intervals up and down, and the mounting hole is provided on the support plate; the torsion support (5) is located between the two support plates.

5. A multi-specification cross spring bearing calibration device according to claim 4, characterized in that: The swing arm (2) is arranged on the upper part of the uppermost support plate, and the swing arm (2) is connected to the insertion end of the torsion support (5).

6. The multi-specification cross spring bearing calibration device according to claim 1, characterized in that: The threading slide block (1) is provided with a threading hole which is perpendicular to the swing arm (2).

7. The multi-specification cross spring bearing calibration device according to claim 3, characterized in that: A fixing column is installed on the base (8), and the sensor (6) is arranged on the fixing column.

8. The multi-specification cross spring bearing calibration device according to claim 7, characterized in that: The fixed column and the torsion support (5) are respectively arranged on two opposite sides of the column.

9. A multi-specification cross spring bearing calibration device according to claim 8, characterized in that: The fixed column is slidably matched with the base (8) along the length direction of the fixed support (7) through a screw slide (9) to adjust the position of the sensor (6).

10. A calibration method, comprising the calibration device for a multi-specification cross spring bearing (3) according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: Obtain the thrust F of the microthruster; Step 2: Obtain specification parameters of the cross spring bearing (3) to be calibrated, including torsional stiffness TSR, size specifications, and maximum rotation angle A1; Step 3: Determine the range of the torque T of the microthruster according to the formula T = TSR / A2, and take the rotation angle A2 in the range of 2 / 3A1 to A1 as the selection criterion; Step 4: According to the formula T=F*L1, determine the arm distance L1 of the calibration device, slide the threading slider (1) along the slideway to the position of the arm distance L1 and fix it; Step 5: According to the formula L2=s / tanA2, the installation position of the sensor (6) is determined based on the principle that the rotation displacement of the swing arm (2) does not exceed the measuring range of the sensor (6), and the sensor (6) is moved to the set position through the lead screw slide (9), where s is the measuring range of the sensor; Step 6: Install the cross spring bearing (3) to be calibrated on the fixed support (7) and the torsion support (5), and fix the cross spring bearing (3) using a three-jaw chuck (4); Step 7: Apply the thrust F of the micro-thruster to the axis of the threading slider (1) to perform a calibration test on the cross spring bearing (3).

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