CN203629859U - Test adjustment device applicable to thermal vacuum environment - Google Patents

Abstract

A test adjustment device suitable for a thermal vacuum environment, including an adjustment base, an observation group, a lever device, a connecting spline, and a thermal vacuum box. The adjustment base is installed in the thermal vacuum box, and the adjustment base is installed to The output shaft of the piece to be tested is connected to the magnetic fluid sealed transmission shaft through the connecting spline, and the magnetic fluid sealed transmission shaft is led out of the box through the thermal vacuum box, and the connecting spline is connected to the lever device, which is installed in the thermal vacuum box. The wall of the thermal vacuum box is equipped with an observation group. The utility model adopts an observation group to observe and record the position of the output shaft of the test piece, uses a lever device to control the disengagement between the output shaft of the test piece and the magnetic fluid seal transmission shaft, and adjusts the temperature of the test piece in the thermal vacuum by adjusting the machine base. The space position in the tank effectively avoids the influence of the deformation of the test piece in the thermal vacuum test on the test. It is suitable for the transmission test in the thermal vacuum environment, and the operation is simple and the precision is high.

Description

A test adjustment device suitable for thermal vacuum environment

technical field

The utility model relates to a test adjustment device in a thermal vacuum environment

Background technique

Aerospace equipment has extremely high performance requirements due to the particularity of its application in the outer space environment. In order to meet the design requirements, it is necessary to simulate the thermal vacuum environment of outer space on the ground, and test the performance and function of the DUT under vacuum and thermal cycle conditions. For example, in the thermal vacuum test that drives or loads the tested part to simulate the drive and load of the tested mechanism, not only a reasonable transmission device is required, but also real-time high-precision measurement equipment such as torque, rotation angle and rotational speed. Ability. the

Due to the reduced reliability of sensors and power equipment in a thermal vacuum environment, the service life is shortened, and it is difficult to control during the test process. Therefore, the test piece is placed in a vacuum box that simulates a thermal vacuum environment, and the torque is transmitted to the vacuum through a sealing device. Outside of the tank, drive loading and information measurements are performed outside the thermal vacuum tank. In the thermal vacuum test, the magnetic fluid seal transmission device is often used as the seal, and the output shaft of the test piece is connected with the magnetic fluid seal transmission shaft to lead out to the outside normal temperature environment. the

The parts to be tested need to be subjected to thermal vacuum tests at different temperatures, that is, after the test is completed at a certain constant temperature, the temperature is raised or lowered, and the next test is performed after the temperature is stable. During the test process, the thermal vacuum box is always in a sealed state, so it is very difficult to adjust the DUT in the box. Both the test piece and the base are asymmetrical pieces, so in the thermal vacuum environment, the test piece will produce irregular deformation, which will cause the axis position of the output shaft to shift, thus affecting its connection with the magnetic fluid seal transmission shaft. connect. Furthermore, when measuring the no-load characteristics of the DUT, it is necessary to perform torque loading on the DUT, and then disengage the output shaft of the DUT from the loading device outside the tank to release it freely. The connection between the sealed drive shaft and the loading device is easy to operate, but it will introduce the influence of the rotational friction of the magnetic fluid seal device. If the connection between the output shaft of the test piece and the magnetic fluid seal drive shaft is directly disconnected in the tank, the test result will be accurate. However, it is not easy to operate under the influence of the heated vacuum tank. the

Contents of the invention

In order to solve the problems that the deformation of the test piece in the thermal vacuum test affects the test, and the test of the no-load characteristics of the test piece in the thermal vacuum environment is difficult to operate, the utility model provides a conveniently operable machine that is not affected by the deformation of the test piece Test conditioning device in a thermal vacuum environment. the

The technical scheme that the utility model solves its technical problem adopts is:

A test adjustment device suitable for a thermal vacuum environment includes an adjustment machine base, an observation group, a lever device, a connecting spline, and a thermal vacuum box. The adjustment machine base is installed in the thermal vacuum box, the test piece is installed on the adjustment machine base, the test piece is connected to the output shaft of the test piece, and the output shaft of the test piece is connected to the magnetic fluid seal by connecting splines. The transmission shaft, the magnetic fluid sealed transmission shaft is drawn out of the box through the thermal vacuum box; the connecting spline is connected to the lever device, and the lever device is installed in the thermal vacuum box; the box wall of the thermal vacuum box is set There are observation groups. the

The observation group includes two laser heads, a control module, a receiving panel, and an observation window; the laser heads are installed on the observation window on the side of the thermal vacuum box, and the receiving panel is parallel to the observation window. the

The axis of the laser head and the output shaft of the test piece are in the same horizontal plane, and the laser beam emitted by the laser head is reflected by the outer cylindrical surface of the output shaft of the test piece and projected on the receiving panel through the observation window. The laser beams emitted by the two laser heads form a certain angle. the

The adjustment base includes a heavy-duty adjustment platform, a support platform, a lifting adjustment screw, and a horizontal adjustment screw. The heavy-duty adjustment platform is placed on the support platform, and the lower end surface of the support platform is supported by three lifting adjustment screws. The upper end of the lifting adjustment screw is fixed to the bearing seat on the lower end surface of the support platform through self-aligning bearings, and the lower end of the lifting adjustment screw is drawn out of the box through the threaded hole on the thermal vacuum box. the

Two horizontal adjustment screws are installed on the side of the heavy-duty adjustment platform, and the horizontal adjustment screw is vertical to the output shaft of the test piece in space. One end of the horizontal adjustment screw is led out of the box through the threaded hole on the vacuum box, One end is connected to the heavy-duty adjustment platform through two joint bearings in series, and the joint bearing is set on the guide shaft seat on the side of the heavy-duty adjustment platform, and the two joint bearings are vertically connected through the axis of the connecting sleeve. the

The end of the output shaft of the test piece and the top end of the ferrofluid seal transmission shaft are fitted with a spline shaft respectively, and the spline sleeve is fitted on the spline shaft. the

The lever device includes a lever, a rack with sliding shafts at both ends, a gear, and a rotating shaft. The rack with sliding shafts at both ends is fixed on the lever mounting plate through the mounting seat of the sliding shaft, the center of the gear is fixed with the rotating shaft and meshed with the rack, and the rotating shaft is led out of the thermal vacuum box through the sealing sleeve, so There are two picks and they are vertically fixed on the rack. The picks respectively pass through the output shaft of the test piece and the magnetic fluid seal transmission shaft and are fitted on the two ends of the spline sleeve. The picks can move with the rack. The spline sleeve is pushed without affecting the spline shaft, and one end of the mounting plate is fixed on the thermal vacuum box, and the other end is supported by a reinforcing plate. the

The thermal vacuum box also includes a box cover and a box body, the box body is sealed by the box cover, and the magnetic fluid seal transmission shaft passes through the box cover. the

Further, the receiving panel can be a smooth plate, or a wall parallel to the observation window. the

The testing method of the present utility model is:

1. Under normal temperature and non-vacuum environment, clamp the piece to be tested on the heavy-duty adjustment platform of the adjustment frame, and connect the output shaft of the piece to be tested with the magnetic fluid seal transmission shaft through a spline. the

2. Control the laser head to emit laser beams through the control module, adjust the angle between the two laser beams, so that the two reflection points are clearly displayed on the receiving panel, and marked as the reference reflection point. the

3. Turn the rotating shaft of the lever device, the gear on the rotating shaft drives the rack to move, and the spline sleeve is shifted to the side of the transmission shaft through the paddle on the rack, and the connection between the output shaft of the test piece and the transmission shaft is released. make it free. the

4. Seal the thermal vacuum box, and test it when it reaches the required temperature and vacuum environment for the test. the

5. After the temperature is stable, judge the position offset of the output shaft of the DUT according to the change of the laser beam reflection point on the receiving panel. the

6. Rotate the lifting adjustment screw or horizontal adjustment screw outside the thermal vacuum tank to control the movement and rotation of the heavy-duty adjustment platform to adjust the spatial position of the test piece until the current reflection point of the two laser beams completely coincides with the reference reflection point. It can be considered that the axis of the output shaft of the test piece coincides with the axis of the magnetic fluid seal transmission shaft. the

7. Turn the rotating shaft of the lever device, turn the spline sleeve to the output shaft side of the test piece, reconnect the output shaft of the test piece and the magnetic fluid seal shaft, and carry out subsequent tests. the

8. Repeat steps 2 to 7 to perform performance tests of the DUT at different temperatures. the

Design thinking and advantages of the present utility model are as follows:

Affected by the thermal vacuum environment, the test piece will produce irregular deformation, which will affect the connection between the output shaft of the test piece and the test device outside the tank. the

The utility model adopts the observation group to observe and record the position of the output shaft of the test piece, uses the lever device to control the disengagement between the output shaft of the test piece and the magnetic fluid seal transmission shaft, and adjusts the temperature of the test piece in the thermal vacuum by adjusting the machine base. Spatial position in the tank. Therefore, the observation team records the initial position of the output shaft of the DUT in a normal temperature environment, and then disengages its connection with the magnetic fluid seal transmission shaft through the lever device, allowing the DUT to deform freely in a thermal vacuum environment, and wait until the temperature is stable. Finally, the observation group cooperates with the adjustment of the machine base, so that the axes of the output shaft of the test piece and the magnetic fluid seal transmission shaft coincide again, and then the output shaft of the test piece and the magnetic fluid seal transmission shaft are connected through the lever device for subsequent tests. After the loading of the test piece is completed, the connection between the output shaft of the test piece and the magnetic fluid seal transmission shaft can also be disconnected through the lever device, so as to facilitate the test of no-load characteristics. the

The lever device adopts the design principle of rack and pinion. The rotating shaft that is led out of the thermal vacuum tank can be driven by the gear on the rotating shaft to move the rack. The paddle is installed vertically on the rack. Therefore, the rotation of the external rotating shaft of the thermal vacuum tank Controls the movement of the paddles inside the thermal vacuum tank. Spline shafts are installed on the output shaft of the test piece and the magnetic fluid seal transmission shaft respectively. The spline sleeve is set on the spline shaft. The picks are located on both sides of the spline sleeve. One side of the shaft moves, and the connection between the spline sleeve and the spline shaft on the output shaft of the test piece can be released, so that the output shaft of the test piece can be released freely; One side of the output shaft of the test piece moves to re-engage the spline sleeve with the spline shaft on the output shaft of the test piece. The lever device can realize disconnection and connection between the output shaft of the test piece and the magnetic fluid seal transmission shaft. the

Five degrees of freedom can be realized by adjusting the machine base. The test piece is fixed on the heavy-duty adjustment platform, the output axial direction of the test piece is set as the x-axis, and the direction perpendicular to the heavy-duty adjustment platform, that is, the vertical direction is the y-axis. Rotating the lifting adjustment screw outside the thermal vacuum box can control the lifting and lowering of the lifting adjustment screw. The three lifting adjustment screws cooperate with each other to realize the movement of the support platform along the y-axis and the rotation around the x-axis and z-axis; the heavy-duty adjustment platform is pressed by gravity On the support platform, the adjustment of the heavy-duty adjustment platform can be realized through the support platform. Two horizontal adjustment screws are installed on the side of the heavy-duty adjustment platform along the z-axis direction. Rotating the horizontal adjustment screw can control the expansion and contraction of the horizontal adjustment screw. rotate. The deformation along the x-axis and the rotation around the x-axis of the test piece do not affect the connection between the spline shaft and the spline sleeve, so the deformation regression in this direction can be ignored. the

The lifting adjustment screw is connected with the support platform through self-aligning bearings, so the rotation of a single lifting adjustment screw will not be affected by the other two lifting adjustment screws, and a plane can be adjusted by three points. The horizontal adjustment screw is connected to the heavy-duty adjustment platform through two joint bearings installed vertically on the axis, and the joint bearings are sleeved on the guide shaft, so there is more adjustment margin. the

The observation group should observe and record the position of the output shaft of the test piece to cooperate with the adjustment of the adjustment base. The observation group is installed on the side of the thermal vacuum box and is opposite to the side position of the output shaft of the test piece, and can observe the changes in the directions of the four degrees of freedom of the output shaft of the test piece. the

The surface of the output shaft of the DUT is a smooth, non-slow reflective surface. The laser beam in the observation group passes through the observation window and is reflected by the surface of the output shaft of the DUT. Therefore, the reflection plane is the outer circle of the laser projection point on the output shaft of the DUT. section. After the DUT is deformed or moved, the projection point of the laser to the surface of the output shaft of the DUT changes, so the change of the reflection plane of the laser will cause the reflection point on the receiving panel to shift. Two laser emitting tubes can control the changes in the directions of the four degrees of freedom of the DUT: Take Figure 4 and FIG. 5 as examples, when the output axis of the DUT shifts along the y-axis, the reflection point shifts along the X direction And the offset direction of the two reflection points is opposite. When the output axis of the test piece is offset along the z-axis direction, the reflection point is offset in the x and z directions and the two offset points are offset in the same direction on the z-axis. When When the output shaft of the test piece rotates and deforms around the z-axis, the reflection point shifts in the same direction in the x direction; when the output shaft of the test piece rotates and deforms around the y-axis, the reflection point shifts in the x and z directions and the two Shift the point in reverse on the z-axis. By adjusting the base to adjust the test piece until the current reflection point of the two laser beams coincides with the reference reflection point, it can be considered that the axis of the output shaft of the test piece coincides with the axis of the magnetic fluid seal transmission shaft. the

Description of drawings

Figure 1 is a schematic diagram of a test adjustment device suitable for thermal vacuum environments

Figure 2 is the left view of Figure 1

Figure 3 is a top view of Figure 1

Figure 4 is a schematic diagram of the principle of laser reflection along the X-axis direction

Figure 5 is a schematic diagram of the principle of laser reflection along the Z-axis direction

Detailed ways

With reference to Figures 1 to 5, a test adjustment device suitable for a thermal vacuum environment includes an adjustment base, a laser test device 26, a lever device, a connecting spline, and a magnetic fluid sealing device, and the test piece 6 is fixed On the heavy-duty adjustment platform 20 of the adjustment machine base, the output shaft 7 of the test piece is connected to the magnetic fluid seal transmission shaft 21 through a spline connection, the lever device is fixed in the thermal vacuum box 2 and the paddle 9 acts on the On the spline sleeve 8, the wall of the thermal vacuum box is provided with an observation group. the

The observation group includes two laser heads 27, a control module, a receiving panel 28, and an observation window 1; the laser head 27 is installed on the observation window 1 on the side of the thermal vacuum box, and the receiving panel 28 is parallel to the observation window. The laser head 27 and the axis center of the output shaft 7 of the test piece are in the same horizontal plane, and the laser light emitted by the laser head 27 is projected on the receiving panel 28 through the observation window 1 after being reflected by the output shaft of the test piece. The lasers emitted by the two laser heads 27 are at a certain angle and in opposite directions. the

The adjustment machine base includes a heavy-duty adjustment platform 20, a support platform 10, a lifting adjustment screw 5, a self-aligning bearing 19, a joint bearing 17, a horizontal adjustment screw 15, a guide shaft 24, and the like. The lower end surface of the support platform 10 is supported by three lifting adjustment screw rods 5, the upper end of the lifting adjustment screw rod 5 is fixed with the bearing seat 18 on the lower end surface of the support platform 10 through self-aligning bearings 19, and the lower end of the lifting adjustment screw rod 5 passes through the heat sink. The threaded hole on the vacuum box 2 leads out of the box, and the heavy-duty adjustment platform 20 is placed on the support platform 10, and two horizontal adjustment screws 15 are installed on the side of the heavy-duty adjustment platform 20, and one end of the horizontal adjustment screw 15 passes through the vacuum The threaded hole on the box leads out of the box, and the other end is connected with the heavy-duty adjustment platform 20 through two joint bearings 17 in series. The joint bearing 17 is set on the guide shaft seat on the side of the heavy-duty adjustment platform 20. Bearing 17 is vertically connected by connecting sleeve shaft 16 . the

The lever device includes a paddle 9, a rack 23 with a sliding shaft at both ends, a gear 11, a sliding shaft mounting seat 13, a rotating shaft 22, a mounting plate 12, and a reinforcing plate 14. The end of the output shaft 7 of the test piece and the top end of the ferrofluid seal transmission shaft 21 are fitted with a spline shaft, the spline sleeve 8 is set on the two spline shafts, and the two plectrums 9 pass through the test piece The output shaft 7 and the magnetic fluid seal transmission shaft 21 are set on both sides of the spline sleeve. The movement of the pick piece 9 can push the spline sleeve 8 to move without affecting the spline shaft. The other end of the pick piece 9 is fixed on the two sides. On the rack 23 with a sliding shaft at both ends, the rack 23 with a sliding shaft at both ends is fixed on the mounting plate 12 through the sliding shaft mounting seat 13, one end of the mounting plate 12 is fixed on the thermal vacuum box 2, and the other end Supported by the reinforcing plate 14 , the center of the gear 11 is fixed to the rotating shaft 22 and meshed with the rack 23 , and the rotating shaft 22 is led out of the thermal vacuum box 2 through the sealing sleeve 25 . the

The thermal vacuum box also includes a box cover 3 and a box body 2 , the box body 2 is sealed by the box cover 3 , and the magnetic fluid seal transmission shaft 21 passes through the box cover 3 . the

Further, the receiving panel 28 may be a smooth flat plate, or a wall parallel to the observation window, or the like. the

The method of adjusting the position of the output axis of the test piece through the change of the laser beam reflection point is: 1. When the current reflection point is offset along the X direction and the two reflection points are offset in opposite directions, move the output axis of the test piece along the y-axis direction ;2. When the reflection point is offset in the x and z directions and the two offset points are offset in the same direction on the z axis, move the output axis of the test piece along the z axis direction; 3. When the reflection point is in the x direction When offsetting in the same direction above, rotate the output shaft of the test piece around the z-axis; 4. When the reflection point is offset in the x and z directions and the two offset points are offset in the opposite direction on the z-axis, turn the test piece The output shaft rotates around the y-axis. the

Claims (3)

1. A test adjustment device applicable to a thermal vacuum environment, characterized in that: it includes an adjustment base, an observation group, a lever device, a connecting spline, and a thermal vacuum box; the adjustment base is installed in a thermal vacuum box , the device to be tested is installed on the adjusting base, the device to be tested is connected to the output shaft of the device to be tested, and the output shaft of the device to be tested is connected to the transmission shaft through the connection spline, and the transmission shaft is led out to the cabinet through the thermal vacuum box. Outside; the connecting spline is connected to the lever device, and the lever device is installed in the thermal vacuum box; the wall of the thermal vacuum box is provided with an observation group; The observation group includes two laser heads, a control module, a receiving panel, and an observation window; the laser head is installed on the observation window on the side of the thermal vacuum box, and the receiving panel is parallel to the observation window; The axis center of the laser head and the output shaft of the test piece is in the same horizontal plane, and the laser beam emitted by the laser head is reflected by the outer cylindrical surface of the output shaft of the test piece and projected on the receiving panel through the observation window. The laser beams emitted by the two laser heads are at a certain angle; The adjustment base includes a heavy-duty adjustment platform, a support platform, a lifting adjustment screw, and a horizontal adjustment screw; the heavy-duty adjustment platform is placed on the support platform, and the lower end of the support platform is supported by three lifting adjustment screws; the lifting adjustment The upper end of the screw is fixed with the bearing seat on the lower end surface of the support platform through the self-aligning bearing, and the lower end of the lifting adjustment screw is led out of the box through the threaded hole on the thermal vacuum box; Two horizontal adjustment screws are installed on the side of the heavy-duty adjustment platform, and the horizontal adjustment screw is vertical to the output shaft of the test piece in space. One end of the horizontal adjustment screw is led out of the box through the threaded hole on the vacuum box, One end is connected to the heavy-duty adjustment platform through two joint bearings in series, the joint bearing is set on the guide shaft seat on the side of the heavy-duty adjustment platform, and the two joint bearings are vertically connected through the axis of the connecting sleeve; The end of the output shaft of the test piece and the top end of the magnetic fluid seal transmission shaft are respectively fitted with a spline shaft, and the spline sleeve is fitted on the spline shaft; The lever device includes a lever, a rack with sliding shafts at both ends, a gear, and a rotating shaft. The rack with sliding shafts at both ends is fixed on the lever mounting plate through the mounting seat of the sliding shaft. The rotating shaft is fixed and meshed with the rack. The rotating shaft is led out of the thermal vacuum box through the sealing sleeve. There are two picks and are vertically fixed on the rack. The picks respectively pass through the output shaft of the test piece and the magnet. The fluid-sealed transmission shaft is set on both ends of the spline sleeve. The pick piece moves with the rack to push the spline sleeve without affecting the spline shaft. One end of the mounting plate is fixed on the thermal vacuum box, and the other end passes through the reinforcement plate support. the 2. A kind of test adjustment device applicable to thermal vacuum environment as claimed in claim 1, it is characterized in that: described thermal vacuum box also comprises box cover and box body, and described box body is sealed by box cover, and described The ferrofluid-sealed drive shaft passes through the case cover. the 3. A test adjustment device suitable for thermal vacuum environment according to claim 1, characterized in that: the receiving panel can be a smooth flat plate, or a wall parallel to the observation window. the

Images