CN103885463B - The spacing arrestment mechanism of electromechanical of rotating machinery and installation thereof, method of adjustment - Google Patents

Abstract

An electromechanical limit brake mechanism for rotating mechanical equipment and its installation and adjustment methods. The electromechanical limit brake mechanism is connected with the transmission mechanism in the drive system of the rotating system through the power transmission device, and transmits the movement of the rotating equipment to the limit brake mechanism; the feature is that the electromechanical limit brake mechanism is also equipped with a rotating A range adjusting device and an emergency braking device; wherein, the structure of the rotating range adjusting device and the emergency braking device adopt the structure of an electromagnetic braking device and are respectively innovated. The invention solves the problems that the rotating shaft system of the rotating machine needs to realize the continuous tracking of the target trajectory in the range of ±0~360° or even a larger range, resist mechanical shock, emergency braking, and prevent dragging and twisting caused by the continuous rotation of the cable . The invention has the advantages of simple assembly process, low maintenance cost, strong bearing capacity, high overall instrument reliability, and low failure rate; the rotation range is adjustable within the range of ±0-360° or even a larger range.

Description

Electromechanical limit brake mechanism for rotating mechanical equipment and its installation and adjustment method

technical field

The invention relates to a limit braking mechanism, in particular to an electromechanical limit braking mechanism for rotating mechanical equipment. The invention also relates to the installation and adjustment method of the electromechanical limit brake mechanism. The present invention is derived from the National Fund Project (Project No.: 11273039), the Industry-University-Research Project of Jiangsu Province (Project No. BY2011167), and the Chinese Academy of Sciences Astronomy Project (Project No.: C-113).

Background technique

The tracking system of the horizon-type astronomical telescope is composed of the azimuth rotation axis and the altitude pitch axis. Through the rotation of the azimuth axis and the altitude axis, the target tracking in the range of ±0~360° or even a larger range is realized. When the telescope is tracking the target, the azimuth rotation axis and the height axis rotate continuously, and the input and output signals of the measurement sensors and the drive motor on the height axis can be transmitted through the slip ring. However, the conductive slip ring will cause a certain range of random changes in the resistance of the wire, which has a great impact on the spectral characteristics and amplitude of weak signals in target tracking. The tracking drive mode of the telescope is mainly driven by worm gear transmission, gear transmission, friction transmission and direct drive. Direct drive technology has the advantages of high rigidity, easy assembly, and low maintenance costs. This makes the direct drive technology more and more widely used in the tracking system of astronomical telescopes. At present, most of the 30-meter-class and above-caliber telescopes that have been pre-researched in the world use the direct drive technology. However, the direct drive method requires a special braking device to realize the emergency braking of the equipment. During the tracking process of the astronomical telescope, it is necessary to realize the limit, brake and prevent mechanical shock within a certain rotation range. Therefore, in order to prevent the damage to the system when the servo system of the above-mentioned and similar equipment fails, it is necessary to set up an emergency braking device to prevent the wire from being twisted due to continuous rotation, and to achieve a range of ±0~360° or even a larger range. target rotation. It is necessary to develop a limit braking mechanism that meets the above requirements. In the current prior art, there is no technical solution capable of satisfying the above requirements.

Contents of the invention

In order to solve the problem that the shafting of the rotating machinery needs to achieve continuous tracking, rotation, emergency braking, and prevention of dragging and twisting caused by the continuous rotation of the cable in a range of ±0~360° or even larger, the present invention will provide a For the electromechanical limit braking mechanism of rotating mechanical equipment, the present invention can simultaneously realize emergency braking, an adjustable rotation range and an electromechanical limit braking mechanism integrating mechanical limitation. The invention can avoid severe impact caused when the equipment fails. The invention also provides installation and adjustment methods of the electromechanical limit brake mechanism.

The technical solution for accomplishing the task of the above invention is: an electromechanical limit brake mechanism for rotating mechanical equipment, the electromechanical limit brake mechanism is connected with the transmission mechanism in the drive system of the rotary system through a power transmission device, The movement of the rotating equipment is transmitted to the limit brake mechanism; it is characterized in that the electromechanical limit brake mechanism is also equipped with a rotation range adjustment device and an emergency brake device;

Among them, the structure of the rotation range adjustment device is: the transmission gear is connected to the transmission shaft through a tensioning sleeve, the transmission shaft is designed with a trapezoidal thread or a ball spiral groove, and the limit stop is connected to the transmission shaft through a trapezoidal thread or a ball spiral groove. When the transmission shaft rotates together with the transmission mechanism of the rotary machine, there is a rectangular groove on the limit slot plate, which limits the limit stopper to move forward and backward along the axial direction of the transmission shaft in a straight line, and the first limit stopper is fixed on the limit stopper. The magnetic element, the second magnetic element, the first magnetic element, and the second magnetic element reciprocate linearly with the limit stopper. When the first magnetic element, the second magnetic element and the corresponding sensors (proximity switches) A, B, and C When , D, E and F are in contact, the corresponding signal will be fed back to the upper controller, and the system will be notified to make corresponding actions; sensor (proximity switch) A, sensor B, sensor C, sensor D, sensor E and sensor F are divided Three groups are fixed on the limit adjustment piece that can move axially along the transmission shaft;

Wherein, sensor A and sensor B form a group, sensor C and sensor D form a group, and sensor E and sensor F form a group.

The emergency brake device adopts an electromagnetic brake device, and its structure is as follows: on the right side of the electromechanical limit brake mechanism (Figure 1), the electromagnetic brake is connected with the fixing bolt through the right bearing end cover, and the electromagnetic brake is Action, when the telescope tracking system is working normally, the electromagnetic brake is energized, the coil will hold the armature, and the electromagnetic brake does not work. When the upper controller finds that there is a fault in the system, the control signal will send an emergency control signal to notify the electromagnetic brake to act, and the electromagnetic brake will When the power is off, the armature presses the brake pad under the action of the spring; the brake pad and the spline sleeve are connected to transmit motion through the spline; then, the braking force is transmitted to the drive shaft through the spline sleeve, and then transmitted to the rotating mechanical transmission through the pinion system to implement emergency braking on the telescope tracking system.

The above scheme is described by taking gear transmission as an example, but the transmission form of the present invention is not limited thereto.

The present invention has following optimization scheme:

1. Adjust the zero position limit adjustment piece to make the electromechanical brake limit mechanism correspond to the zero position of the rotating equipment. Adjusting the positive limit adjustment piece can adjust the positive movement range of the rotating equipment, and adjusting the negative limit adjustment piece can adjust the negative movement range of the rotating equipment.

2. The rectangular groove of the limit groove plate is pasted with wear-resistant materials to reduce friction and improve service life.

3. The electromechanical limit brake mechanism is also equipped with a position feedback system, a mechanical hard limit and its energy absorbing buffer device; the structure of the position feedback system is: at the end of the electromechanical limit brake structure An absolute encoder is installed on the outside of the electromagnetic brake 7. After obtaining the corresponding zero position of the brake limit mechanism and the rotating equipment through the first step, the limit brake mechanism can be directly used to obtain the operation of the rotating machinery by setting the deviation value. Position, and the movement range of the equipment can be set through the host computer control software, so that the equipment can be controlled without the automatic position feedback signal of the rotating mechanical equipment.

The structure of the mechanical hard limit and its energy-absorbing buffer device is: in the electromechanical limit brake mechanism, a mechanical limit brake device is designed, and a positive buffer, Negative buffer, when the control system is out of control, the rotating parts of the telescope will rush out of its range of motion, and the telescope has a large moment of inertia, which will cause severe impact, so the designed hydraulic buffer absorbs the energy of the rotating parts of the telescope, and avoids Violent impacts cause damage to optical instruments, and at the same time convert most of the kinetic energy of the telescope mirror into heat energy and consume it to avoid equipment rebound.

4. The sensors (proximity switches) A, B, C, D, E and F adopt a redundant structure to increase the reliability of the system. Two proximity switches are used as detection sensors for zero point and positive and negative maximum position feedback. When working, as long as one of the two components can work normally, the brake limit mechanism can operate normally.

Specifically, the present invention is shown in Figure 1 (Figure 1-1, Figure 1-2, Figure 1-3): the sensors A, B, C, D, E and F are divided into three groups and fixed on the On the moving limit adjustment pieces 51, 52, 53. Adjusting the zero position limit adjustment plate 52 can make the brake limit mechanism correspond to the zero position of the rotating equipment. Adjusting the positive limit adjustment piece 31 can adjust the positive movement range of the rotating equipment, and adjusting the negative limit adjustment piece 53 can adjust the negative movement range of the rotating equipment. The limit stopper 5 is connected with the transmission shaft 1 through threads, and when the transmission shaft 1 rotates, it drives the limit stopper 5 to rotate, and when it reaches the sensors A and B, it reaches the maximum positive adjustment range, and the sensors A and B send signals, Notify the upper computer controller to control the drive system to take corresponding actions. When it reaches the sensors C and D, it reaches the zero position. When it reaches the sensors E and F, it reaches the maximum negative adjustment range. The sensors E and F send signals to notify the upper computer controller to control the drive system to take corresponding actions.

The transmission device of the limit mechanism is mainly composed of transmission gear 3, tensioner sleeve 2, bearing end caps 4,6, transmission shaft 1, limit groove plate 9, limit block 5, tapered roller bearings 101,102 And transmission box 8 forms. The transmission gear 3 and the transmission shaft 1 are connected by a tensioning sleeve 2, which can transmit power and limit the maximum torque, and protect the transmission system from damage; the transmission shaft 1 is fixed on the transmission box through thrust tapered roller bearings 101 and 102 8, both sides limit axial movement with bearing end caps 4,6. Thrust tapered roller bearings can withstand large axial loads and are not sensitive to axial impact. The transmission shaft is processed with trapezoidal threads or ball spiral grooves. According to the size of the rotating mechanical load and the transmission ratio, the appropriate thread (ball spiral) specification and length are designed to ensure that its range of motion can meet the range of motion of the equipment shaft system. Limiting grooves are designed on the limiting groove plate 9 (see FIG. 1 ), and wear-resistant materials are designed in the structure to reduce friction and improve wear resistance. The limit block 5 is constrained to move forward and backward in a linear motion in the limit groove. And the corresponding sensors are triggered by the first magnetic element 21 and the second magnetic element 22 fixed on the limit block 5 .

The movement range adjustment device of the limit mechanism is mainly close to the switch adjustment pieces 51, 52, 53, the locking adjustment screws 61, 62, 61, 62, 61, 62, the proximity switches A, B, C, D, E, F. The limit block 5, the first magnetic element 21, and the second magnetic element 22 are composed.

The technical solution for completing the second invention task of the present application is the installation and adjustment method of the above-mentioned electromechanical limit brake mechanism, which is characterized in that the steps are as follows:

⑴. When installing, first adjust the limit stopper 5 to the center of the limit groove (see Figure 1 limit groove plate) according to the zero point of the azimuth axis and height axis of the telescope, and then connect it to the transmission system of the rotating equipment;

⑵. Adjust the zero proximity switch adjustment sheet 52;

⑶. The zero position proximity switches C and D generate response signals through the first magnetic element 21 and the second magnetic element 22, and lock the zero position proximity switch adjustment piece 52 with the locking adjustment screws 61 and 62;

⑷. Turn the telescope azimuth forward to the maximum positive position;

⑸. Adjust the forward proximity switch adjustment plate 51, the forward proximity switches A and B generate response signals through the first magnetic element 21 and the second magnetic element 22, and lock the forward proximity switch adjustment with locking adjustment screws 61 and 62 sheet 51;

⑹. Reversely rotate the telescope azimuth to the negative maximum position, adjust the negative proximity switch adjustment plate 53, the negative proximity switches E and F generate response signals through magnetic components, and lock the negative proximity with the locking adjustment screws 61 and 62 Switch adjustment piece 53;

⑺. Thus, the zero point of the azimuth axis of the telescope and the range of positive and negative motions are determined. The height axis can determine its zero point, positive and negative motion orientations by the same process.

The mechanical limit mechanism can avoid violent impact when the equipment fails. When the control system of the upper computer of the rotating machinery is abnormal, or the emergency braking device fails, the tracking mechanism of the rotating machinery will exceed the specified rotation range of the equipment under the action of inertia, which will cause great damage to the system. The tracking system is limited within the permitted movement range, and a mechanical limit mechanism is designed outside the rotation range. A mechanical limit mechanism is provided on the outside of the positive and negative limit. The forward and reverse buffers 41, 42 of the mechanical energy-absorbing elements are connected to the limit groove plate through the fixing bolts 121, 122, and the positive and negative mechanical energy-absorbing elements 41, 42 pass through The threads are respectively connected to the positive and negative mechanical energy-absorbing element fixing seats, adjusted to a suitable position, and the mechanical energy-absorbing element and the fixing seat are locked through double nuts. The mechanical energy-absorbing elements 41 and 42 can convert the kinetic energy of the azimuth and height axes of the telescope into heat energy, thereby avoiding violent impact. Its working process is as follows: When the transmission shaft rotates, the limit stopper 5 is driven to rotate through its own trapezoidal thread (ball screw), and the limit stopper 5 is bounded by the limit groove plate 9 along the transmission The shaft axis reciprocates linearly in forward and reverse directions. When the limit stopper 5 reaches the sensors A and B, the maximum positive adjustment range is reached. As long as one of the sensors A and B can work, a signal can be sent to notify the upper computer controller to control the drive system to take corresponding actions. If all the sensors A and B fail, and the brake fails, and the upper computer controller cannot be notified, or the upper computer controller is out of control, the rotating shaft of the rotating machine may rush out of the limited effective range of motion. At this time, the positive The mechanical energy-absorbing element 41 absorbs and converts the kinetic energy of the telescope into heat energy, preventing violent impacts from causing damage to precision instruments such as the primary mirror. Similarly, when the above-mentioned failure occurs in the reverse operation, the negative mechanical limit energy-absorbing element 42 can play the same role.

The emergency braking device can realize the emergency braking when the rotating machinery accident occurs. When the normal operation of the equipment is required to meet an emergency situation, an emergency stop is required, and an emergency braking system is required. Therefore, an electromagnetic braking device is designed in the limit movement mechanism. On the right side of the screw limit structure, the electromagnetic brake 7 is connected with the fixing bolt 112 through the right bearing end cover 6. The electromagnetic brake 7 acts when the power is lost. Stop, the brake does not work. When the host controller finds that there is a fault in the system, it will send an emergency control signal to notify the electromagnetic brake 7 to operate. The electromagnetic brake 7 loses power, and the armature 15 presses the brake pad 16 under the action of the spring 17. The brake pad 16 is connected with the spline sleeve 18 to transmit motion through the spline. Then, the braking force is transmitted to the transmission shaft 1 through the spline sleeve 18, and then transmitted to the rotating mechanical transmission system through the gear 3 (Fig. 1), so as to realize the emergency braking of the telescope tracking system.

The invention solves a series of functions such as the continuous tracking of ±0~360° target, rotation, emergency braking, and prevention of dragging and twisting caused by the continuous rotation of the cable that the shafting of the rotating machine needs to realize. The present invention is a limit brake mechanism that can realize emergency brake, adjustable rotation range and mechanical hard limit at the same time. The invention has the advantages of simple assembly process, low maintenance cost, strong bearing capacity, high overall instrument reliability and low failure rate; the rotation range can be adjusted in the range of ±0-360° or even larger.

Description of drawings

Figure 1 (including Figure 1-1, Figure 1-2, and Figure 1-3) is a three-dimensional schematic diagram of the telescope's limit mechanism;

Figure 2 is a schematic diagram of limit adjustment and feedback of rotating machinery;

Fig. 3 is a structural diagram of the transmission device of the limit mechanism;

Figure 4 (including Figure 4-1, Figure 4-2, and Figure 4-3) is a schematic diagram of the adjustment and feedback of the rotating machinery's range of motion;

Figure 5 (including Figure 5-1 and Figure 5-2) is the schematic diagram of the hard limit adjustment and feedback of the rotating machinery;

Figure 6 is a schematic diagram of emergency braking feedback and operating range control of rotating machinery;

Figure 7 is a schematic diagram of the application of the limit brake mechanism in the telescope tracking system.

detailed description

Embodiment 1 is used for the comprehensive experiment platform of the telescope tracking system. The braking limit mechanism is used to implement motion range detection, system abnormality protection and emergency braking of the tracking system.

The azimuth limit brake mechanism is connected with the large gear of the telescope azimuth drive system through its transmission gear, and transmits the movement of the telescope to the limit brake mechanism. The limit stopper is connected with the transmission shaft through a trapezoidal thread. When the main shaft rotates, there is a rectangular groove on the limit groove plate 9, which limits the limit stopper 5 to move back and forth linearly along the axial direction of the transmission shaft 1. The first magnetic element 21 and the second magnetic element 22 are fixed on the stopper 5, and the first magnetic element 21 and the second magnetic element 22 move linearly back and forth with the limit stopper 5, when the magnetic element is in contact with the corresponding proximity switch , will feed back the corresponding signal to the upper controller, and notify the system to make corresponding actions.

The detailed design is that the transmission device of the limit mechanism is mainly composed of transmission gear 3, tensioner sleeve 2, bearing end cover 4, 6, transmission shaft 1, limit groove plate 9, limit block 5, tapered roller Bearings 101, 102 and transmission box 8 are formed (see Fig. 3). The transmission gear 3 and the transmission shaft 1 are connected by a tensioning sleeve 2, which can transmit power and limit the maximum torque, and protect the transmission system from damage; the transmission shaft is fixed on the transmission box 8 through thrust tapered roller bearings 101 and 102 On both sides, the axial movement is limited by bearing end caps 4,6. Thrust tapered roller bearings can withstand large axial loads and are not sensitive to axial impact. A trapezoidal thread is processed on the drive shaft. According to the size of the telescope, rotate the appropriate thread specification and length to ensure that its range of motion can meet the range of motion of the azimuth and height axes of the telescope. A limit slot is designed on the limit slot plate 9 (see Fig. 1), and its size is determined according to the size and range of motion of the telescope. The limit block 5 is constrained to move forward and backward in a linear motion in the limit groove. And through the first magnetic element 21 and the second magnetic element 22 fixed on the limit block 5, the corresponding sensors are triggered.

The movement range adjustment device of the limit mechanism is mainly close to the switch adjustment pieces 31, 32, 33, the locking adjustment screws 61, 62, 61, 62, 61, 62, the proximity switches A, B, C, D, E, F, limit block 5, magnetic element 21,22 are formed. When installing, first adjust the limit stopper 5 to the center of the limit groove (see Figure 1 limit groove plate) according to the zero point of the azimuth axis and height axis of the telescope, then connect with the telescope, and adjust the zero position proximity switch adjustment Sheet 51, zero position proximity switch C, proximity switch D generate response signals when passing through the first magnetic element 21 and the second magnetic element 22, lock the zero position proximity switch adjustment plate 52 with locking adjustment screws 63, 64; forward rotation Adjust the orientation of the telescope to the forward maximum position, adjust the forward proximity switch adjustment piece 51, and generate a response signal when the forward proximity switch A and proximity switch B pass through the first magnetic element 21 and the second magnetic element 22, and lock the adjustment screw 61 , 62 lock the positive proximity switch adjustment piece 51; reversely rotate the telescope azimuth to the negative maximum position, adjust the positive proximity switch adjustment piece 53, the negative proximity switch E, the proximity switch F pass through the first magnetic element 21, the second When the magnetic element 22 produces a response signal, lock the negative proximity switch adjustment piece 53 with the locking adjustment screws 65, 66; thus the zero point of the telescope azimuth axis and the range of positive and negative motions are determined. The height axis can determine its zero point, positive and negative motion orientations by the same process. The proximity switch adopts a redundant structure to increase the reliability of the system. Two proximity switches are used as the detection sensors for the feedback of the zero point and the positive and negative maximum positions. When working, as long as one of the two components can work normally, the brake limit mechanism can operate normally.

In order to avoid severe impact when the equipment fails, a mechanical limit mechanism is designed for the brake limit mechanism. When the control system of the telescope host computer is abnormal, or the emergency braking device fails, the tracking mechanism of the telescope will exceed the specified rotation range of the equipment under the action of inertia, which will cause great damage to the system. It is limited within the permitted movement range, and a mechanical limit mechanism is designed outside the rotation range. A mechanical limit mechanism is arranged on the outside of the positive and negative limit, the positive buffer 41 of the mechanical energy-absorbing element, and the negative buffer 42 are connected with the limit groove plate 9 by fixing bolts 121, 122, and the positive buffer 41, The negative buffer 42 is respectively connected to the positive and negative mechanical energy-absorbing element fixing seats through threads, adjusted to a suitable position, and the mechanical energy-absorbing element and the fixing seat are locked by double nuts. The buffers 41 and 42 of the mechanical energy-absorbing elements can convert the kinetic energy of the azimuth and height axes of the telescope into thermal energy, thereby avoiding violent impact. Its working process is as follows: the height axis and azimuth axis of the telescope tracking experimental platform are equipped with electromechanical limit brake mechanisms, wherein the azimuth axis brake limit mechanism 25 passes its own transmission gear (pinion gear) 3 azimuth axis gear 24 The meshing realizes the movement transmission of the azimuth axis, and the height axis braking limit mechanism 23 realizes the movement transmission of the height axis through its own pinion 3 meshing with the height axis gear 23 . Taking the movement of the azimuth axis as an example, the working principle of the electromechanical limit brake mechanism and its installation and adjustment methods are explained. When the azimuth axis of the telescope moves, the azimuth gear 24 meshes with the transmission gear (pinion) 3 of the azimuth limiting braking mechanism 25 to transmit the motion to the azimuth braking limiting mechanism. Drive the transmission shaft 1 of the azimuth braking limit mechanism 25 to rotate, and the transmission shaft 1 drives the limit stopper 5 to rotate through its own trapezoidal thread (ball screw), and the limit stopper 5 is restrained by the limit groove plate 9 limit groove Next, move forward and backward linearly along the axis of the transmission shaft. When the limit stopper 5 reaches the sensors A and B, the maximum positive adjustment range is reached. As long as one of the sensors A and B can work, a signal can be sent to notify the upper computer controller to control the drive system to take corresponding actions. If all sensors A and B fail, and the brake fails, and the upper computer controller cannot be notified, or the upper computer controller is out of control, the azimuth axis or altitude axis of the telescope may rush out of the limited effective range of motion. The forward mechanical energy-absorbing element is directed toward the buffer 41, absorbing and converting the kinetic energy of the telescope into heat energy, preventing violent impacts, which may cause damage to precision instruments such as the primary mirror. Similarly, when the above-mentioned failure occurs in the reverse operation, the positive buffer 42 of the negative mechanical limit energy-absorbing element can play the same role. 41 - 1 and 42 - 1 in the figure are the fixing seats of the third magnetic element 41 and the fourth magnetic element 42 respectively.

The emergency braking device can realize the emergency braking when the telescope accident occurs. When the normal operation of the equipment is required to meet an emergency situation, an emergency stop is required, and an emergency braking system is required. Therefore, an electromagnetic braking device is designed in the azimuth axis limiting mechanism 25 . On the right side of the electromechanical limit braking structure 25, the electromagnetic brake 7 is connected with the fixing bolt 112 through the right bearing end cover 6, and the electromagnetic brake 7 acts when the power is lost. When the telescope tracking system works normally, the electromagnetic brake 7 is energized, and the coil 14 When the armature 15 is sucked, the electromagnetic brake 7 does not work. When the upper controller finds that there is a fault in the system, the control signal 21 will send an emergency control signal to notify the electromagnetic brake 7 to act, and the electromagnetic brake 7 is powered off. Under action, compress brake pad 16. The brake pad 16 is connected with the spline sleeve 18 to transmit motion through the spline. Then, the braking force is transmitted to the transmission shaft 1 through the spline sleeve 18, and then transmitted to the telescope azimuth shaft gear 24 through the transmission gear 3 (Fig. 1), so as to implement emergency braking on the azimuth axis of the telescope tracking system.

The installation, debugging and working principle of the braking limit mechanism 26 of the height axis are the same as those of the azimuth axis, and will not be repeated.

Claims (1)

1. the installation of the spacing arrestment mechanism of electromechanical, a method of adjustment, the method related for rotating machineryThe spacing arrestment mechanism of electromechanical, is connected by the transmission mechanism in the drive system of power transmission and rotary system, will revolveThe motion that turns equipment passes to spacing arrestment mechanism; In the spacing arrestment mechanism of described electromechanical, be also provided with rotating range adjustment dressPut and emergency braking apparatus; Wherein, the structure of rotating range adjusting device is: travelling gear connects by expansion sleeve and power transmission shaftConnect, have trapezoidal thread or ball screw groove on power transmission shaft, positive stop is by trapezoidal thread or ball screw groove and transmissionAxle connects, and in the time that main shaft rotates, has a rectangular channel on spacing frid; Spacing gear is limited to before power transmission shaft axial directionRear rectilinear movement, is fixed with the first magnetic element (21) on positive stop, the second magnetic element (22), this first magnetic element(21), the second magnetic element (22) comes and goes and does rectilinear motion with postioning abutment, when this magnetic element and corresponding approach switch connectWhile touching, will feed back corresponding signal to host controller, and reporting system is made corresponding action; Sensors A, sensor B, biographySensor C, sensor D, sensor E and sensor F divide three groups, and be fixed on can be along on the axially movable spacing trimmer of power transmission shaft; InstituteStating emergency braking apparatus is to adopt electro-magnetic braking device, and its structure is: on spiral position limiting structure right side, electromagnetic brake is by rightBearing (ball) cover connects with set bolt, and electromagnetic brake moves while being dead electricity, when telescope tracking system is normally worked, and electromagnetic systemMoving device energising, coil holds armature, and electromagnetic brake is inoperative, in the time there is fault in host controller discovery system, controlSignal processed can send emergent control signal, the action of notice electromagnetic brake, and electromagnetic brake dead electricity, armature is in the effect of springUnder, compress brake block; Brake block is connected and is transmitted motion by flower tooth with spline housing; Then, brake force passes to by spline housingPower transmission shaft, and then logical gear transmission is to rotating machinery drive system, realizes telescope tracking system is implemented to brake hard;

It is characterized in that, step is as follows:

(1). when installation, first according to the zero point of telescopical azimuth axis and altitude axis, positive stop is adjusted to stopper slot centerPosition, then connects with telescope;

(2). adjust zero-bit approach switch trimmer;

(3). null pick-up C, D, by the first magnetic element (21), are created in response signal when the second magnetic element (22), useThe locked zero-bit approach switch of screw (61,62) trimmer is adjusted in locking;

(4). forward rotation telescope orientation is to forward maximum position;

(5). adjust forward approach switch trimmer, forward sensors A, B are by the first magnetic element (21), the second magnetic element(22) time, be created in response signal, with the locked forward approach switch of locking adjustment screw (61,62) trimmer;

(6). rotate backward telescope orientation to negative sense maximum position, adjust negative sense approach switch trimmer, negative sense sensor E, FBy the first magnetic element (21), when the second magnetic element (22), be created in response signal, adjust screw (61,62) with locking and lockDead negative sense approach switch trimmer;

(7) thereby. determine the zero point of telescope azimuth axis, positive and negative range of movement; Altitude axis by same process determine its zeroPoint, and positive and negative motion orientation.