CN102879198A - Speed limiter test table for elevator and testing system thereof - Google Patents

Abstract

The invention discloses a test bench for an elevator speed governor, which belongs to the technical field of monitoring devices for elevator components. It includes a drive unit, a detection unit, a speed governor fixing device, and a stand; the drive wheel and the detection wheel are both pressed against the circumferential edge of the sheave of the speed governor; the drive unit also includes a drive adjustment mechanism, and the drive adjustment mechanism includes Drive the elastic thrust structure; the detection unit also includes a detection and adjustment mechanism, and the detection and adjustment mechanism includes a detection elastic thrust structure. Using this test bench to test has the characteristics of high precision and small error. Also disclosed is a testing system for an elevator overspeed governor, including an electrical part and a mechanical part; the mechanical part adopts the above-mentioned elevator overspeed governor test bench; the electrical part controls the testing system to realize the whole testing process and automatic data collection and results analyze. The invention is beneficial to the development and manufacture of the speed limiter of the elevator, and greatly improves the efficiency of the factory inspection of the speed limiter of the elevator and the accuracy of product detection data.

Description

Elevator Speed Governor Test Bench and Its Test System

technical field

The invention relates to a monitoring device for elevator components, in particular to an elevator speed governor test bench and a test system thereof.

Background technique

There are three main types of existing elevator speed limiter action speed testing instruments: the first is to use a special speed limiter in conjunction with a debugging electric drill to measure the electrical and mechanical action speed of the speed limiter. When in use, put the head of the special speed limiter in the pitch circle groove of the elevator speed limiter, and do not lose it. This method is manual debugging, which has errors, and sometimes the action value is suddenly stopped due to the sudden stop of the speed limiter sheave, and the value displayed by the instrument is the value that has been decelerated, and the test needs to be restarted.

In response to the above problems, another test instrument has been researched and developed. When in use, attach a small magnet to the side of the speed governor sheave, set the initial speed, input the pitch circle circumference of the speed governor sheave, and start the measurement. But the accuracy of this method is not high, because the speed limiter takes a pulse signal every time the rope wheel rotates, that is, the rope wheel needs to rotate a complete circle before the pulse can be read, but the speed limiter just stops at the whole circle when it moves. The probability is very low. From the linear velocity calculation formula V=πDn, it can be seen that the accuracy of the linear velocity V is directly related to the accuracy of the reading speed n. However, most of the states of this tester have the following _{possibilities} . >n _measurement , n _real -n _measurement =Δn, and 0<Δn<1, that is, the linear velocity measurement error of the tester Δn=πDn _real -πDn _measurement =πDΔn, it can be seen from the formula that when Δn is infinitely close to 1 and When D is very large, the measured linear velocity error will be very large. Secondly, the operation steps of the test instrument are cumbersome, and there is no data storage and backup.

In response to the above problems, people have researched and developed a third test instrument. The test instrument is driven by the lower drive unit through an O-belt to drive the sheave of the speed limiter to move, and then the test unit contacts the sheave through the crank arm. Perform data collection. Although this kind of speed limiter test bench solves some of the problems existing in the first two test instruments, the O-belt used in this test test bench is a non-standard belt. There are many models of speed limiters on the market, and the cost of customizing the belt is relatively high. In addition, there is great technical difficulty in the connection of the O-belt; secondly, the belt is elongated, which will inevitably lead to a certain hysteresis in the speed control between the drive unit and the speed limiter sheave, and there must be a lag in the measurement of the high-speed area. Large error; the curved arm of the retest unit needs to be manually adjusted and pressed for each test, which has a large change in the pressing force, and there is a large human factor in data collection, which is prone to errors. Again, the operation steps such as connecting the belt and adjusting the mechanical arm are cumbersome. Also make this test instrument use inconvenience.

Contents of the invention

Based on this, the object of the present invention is to overcome the defects of the prior art, and provide a test bench for the speed governor of an elevator that does not lose rotation, has high precision, and has small errors.

Another object of the present invention is to provide an automatic elevator speed governor testing system with high precision and small error.

In order to realize the purpose of the present invention, the following technical solutions are provided: a test bench for an elevator overspeed governor, comprising a drive unit, a detection unit, a overspeed governor fixing device, a stand; the drive unit includes a drive wheel and a drive motor, and the The drive wheel is connected to the output end of the drive motor; the detection unit includes a detection wheel and an encoder, and the axle of the detection wheel is connected to the encoder; both the drive wheel and the detection wheel are pressed against the circumferential edge of the sheave of the speed governor The drive unit also includes a drive adjustment mechanism, the drive adjustment mechanism includes a drive elastic thrust structure, and the drive elastic thrust structure applies force to the drive wheel, and the direction of its elastic force is consistent with the direction of the line connecting the drive wheel and the center of the rope wheel; The detection unit also includes a detection and adjustment mechanism. The detection and adjustment mechanism includes a detection elastic thrust structure, and the detection elastic thrust structure exerts force on the detection wheel, and the direction of its elastic force is consistent with the direction of the line connecting the detection wheel and the rope wheel.

Through the driving adjustment mechanism and the detection adjustment mechanism, the driving wheel and the detection wheel are pressed against the rope pulley with a suitable pressure, and the drive wheel and the detection wheel are pressed against the rope with a suitable pressing force by selecting a suitable elastic thrust structure. On the pulley, the dynamic adjustment pressing force will not be too large to hinder the rotation of the rope wheel, nor will it be too small to cause lost rotation. The existence of the above features ensures that the driving wheel, detection wheel, speed limiter and the rope wheel are not lost, ensures the consistency of the linear speed among the three, overcomes the error caused by the lag of the belt transmission, and has high precision and small error. specialty.

Further technical scheme is described below:

In some embodiments, both the driving wheel and the detection wheel are rubber-coated wheels, preferably rubber-covered wheels whose outer circumference is covered with rubber material.

Rubber-coated wheels covered with rubber material are used. The coefficient of dynamic friction between rubber and cast iron is 0.8, while the coefficient of dynamic friction between steel and cast iron is between 0.16 and 0.18. The former is 4 times that of the latter. In the case of the same pressing force Under the circumstances, the friction force between rubber and cast iron is much higher than that between steel and cast iron. Second, rubber has a certain degree of elasticity, which can perfectly absorb the impact force generated during high-speed rotation, so that there is no friction between the rubber-coated wheel and the sheave. There is a jumping phenomenon, and the rubberized wheel also has the advantages of good friction and wear resistance.

In some embodiments, the drive adjustment mechanism further includes a drive adjustment platform that can slide along the direction of the elastic force of the driving elastic thrust structure, and the drive adjustment platform can be slidably connected with the bench of the test bench, and can also be connected with other supporting test benches. The support structure is slidingly connected; the driving motor and the driving wheel are installed on the driving adjustment platform, one end of the driving elastic thrust structure is pressed against the driving adjustment platform, and the other end is fixed, such as being fixed on the bench of the test bench , the elastic force is transmitted through the driving adjustment platform, and the driving wheel is pressed tightly on the rope wheel. Through the use of the driving adjustment platform, the driving elastic thrust structure exerts force on the driving motor and the driving wheel through the adjusting platform, so as to avoid the axial deviation between the output end of the driving motor and the driving wheel shaft and affect the rotation of the driving wheel.

In some embodiments, the detection and adjustment mechanism also includes a detection and adjustment platform that can slide along the direction of the elastic force of the detection elastic thrust structure. The structure is slidingly connected; the encoder and the detection wheel are all installed on the detection and adjustment platform, one end of the detection elastic thrust structure is pressed against the detection and adjustment platform, and the other end is fixed, such as being fixed on the bench of the test bench, The elastic force is transmitted through the detection and adjustment platform, and the detection wheel is pressed tightly on the rope wheel. Through the use of the detection and adjustment platform, the detection elastic thrust structure can exert force on the detection wheel and the encoder through the detection and adjustment platform, so as to avoid the axial deviation between the encoder and the detection wheel shaft, which will affect the detection result of the encoder.

In some embodiments, there is a drive adjustment platform included in the drive adjustment mechanism and a detection adjustment platform included in the detection adjustment mechanism; the elastic thrust structure applies force to the drive unit and the detection unit as a whole through the adjustment platform.

In some embodiments, the driving unit also includes a driving mobile platform and a driving mobile device, the driving wheels, the driving motor and the driving adjustment mechanism are all installed on the driving mobile platform, and the driving mobile device is connected to the driving mobile platform; The above-mentioned driving mobile platform can move towards the direction of the speed limiter sheave; in the embodiment provided with the driving mobile platform, one end of the driving elastic thrust structure is pressed against the driving adjustment platform, and the other end is pressed against the driving mobile platform; and The driving adjustment platform is slidingly connected with the driving mobile platform;

And/or the detection unit also includes a detection mobile platform and a detection mobile device, the detection wheel, encoder and detection adjustment mechanism are all installed on the detection mobile platform, and the detection mobile device is connected to the detection mobile platform; the detection mobile The platform can move in the direction of the speed limiter rope wheel; in the embodiment with a detection mobile platform, one end of the detection elastic thrust structure is pressed against the detection and adjustment platform, and the other end is pressed against the detection and adjustment platform; and the detection and adjustment The platform is slidingly connected with the detection mobile platform.

Adjust the distance between the two mobile platforms through the mobile device, and then adjust the distance between the driving wheel and the detection wheel, so that it can be adjusted according to different diameters of the sheave, so that the test bench can be used according to the speed limiter during the test. The diameter of the sheave can be adjusted according to the diameter of the sheave, and it is not limited by the diameter of the sheave, so it has high test compatibility.

In some embodiments, the drive unit further includes a drive wheel shaft mount and a drive wheel height adjustment mechanism, the drive wheel is mounted on the drive wheel shaft mount, and the drive wheel height adjustment mechanism is connected to the drive wheel shaft mount;

And/or the detection unit further includes a detection wheel shaft mounting seat and a detection wheel height adjustment mechanism, the detection wheel is mounted on the detection wheel shaft mounting seat, and the detection wheel height adjustment mechanism is connected to the detection wheel shaft mounting seat.

The test bench can be adjusted according to the center height of the speed limiter during the test, and is not limited by the center height of the speed limiter, and has high test compatibility.

In some embodiments, the speed governor fixing device includes a pressing and fixing device; the pressing and fixing device includes a pressing cylinder, a moving plate of the fixing device, a pressing block, a fixing rod, a fixing plate, a tightening rod, a tightening fixed nut; one end of the fixed rod is connected to the stand, and the other end is connected to the fixed plate, the compression cylinder is fixed on the fixed plate, the piston rod of the compressed cylinder is connected to the moving plate of the fixing device, and the moving plate of the fixing device is a slidable suit On the fixed rod, there is a sliding groove on it, and a sliding through hole is opened at the bottom of the sliding groove. Lean against the moving plate of the fixing device, the other end passes through the sliding through hole and the fastening through hole, and is fixed by the fastening nut. Therefore, the base of the speed limiter is fixed on the bench, and the test bench can be adjusted according to the size and width of the base of the speed limiter during the test, without being limited by the size of the base, and has high test compatibility.

In some embodiments, the speed limiter fixing device also includes an adjustment limit device, and the adjustment limit device includes an adjustment limit block and an adjustment limit nut; One end of the adjustment limit block is against the stand, and the other end passes through the adjustment limit through hole, and is fixed by the adjustment limit nut. Further, the position of the base of the speed limiter with different widths is limited by adjusting the limit block to ensure the stability of the speed limiter during the test.

In order to realize another object of the present invention, the following technical solutions are provided: a test system for an elevator overspeed governor, including an electrical part and a mechanical part; the aforementioned mechanical part adopts the aforementioned elevator overspeed governor test bench; the electrical part includes a computer , an output device, a programmable controller, a servo amplifier and a photoelectric switch for collecting the electrical action signal of the speed limiter; the output device and the programmable controller are electrically connected to the computer, and the programmable controller is connected to the servo amplifier, A photoelectric switch and an encoder; the servo amplifier is connected to the drive motor.

The test system can not only ensure that the driving wheel, the detection wheel and the sheave of the speed limiter are not lost, but also ensure the consistency of the linear speed among the three, overcome the error caused by the lag of the belt transmission, and have high precision and small error It can also automatically collect data, and has data storage, data management, data backup and data output functions, so that personnel can monitor the testing process in real time.

The programmable controller is also connected to various mobile devices, height adjustment mechanisms, cylinders and other equipment in the above-mentioned elevator speed limiter test bed, and the operation of each equipment in the test bed is precisely controlled by the programmable controller to realize automation.

The advantages of the aforementioned technical solutions are described below:

The elevator speed limiter test bench provided by the present invention can ensure that the driving wheel, the detection wheel and the sheave of the speed limiter do not lose rotation, ensure the consistency of the linear speed among the three, and overcome the error caused by the hysteresis of the belt drive , which has the advantages of high precision and small error. At the same time, the use of the test bench is not limited by the center height of the speed governor, the diameter of the sheave and the installation width of the base, and the compatibility is extremely high.

The elevator overspeed governor test system provided by the present invention can not only ensure that the driving wheel, the detection wheel and the sheave of the overspeed governor are not lost, but also ensure the consistency of the linear speed among the three, and overcome the problems caused by the hysteresis of the belt drive. Error, with the characteristics of high precision and small error, can also fully automatic data collection, with data storage, data management, data backup and data output functions, so that personnel can monitor the testing process in real time, which is conducive to the development of elevator speed limiter And research and development have greatly improved the efficiency of the factory inspection of the elevator speed limiter and the accuracy of product inspection data.

Description of drawings

Fig. 1 is the elevator overspeed governor test bench of embodiment 1 of the present invention;

Fig. 2 is the top view of Fig. 1;

Fig. 3 is a partially enlarged view of part C in Fig. 2;

Fig. 4 is a schematic view of the drive wheel structure;

Fig. 5 is a schematic diagram of the driving wheel height adjustment mechanism;

Fig. 6 is a schematic view of the structure of the pressing and fixing device;

Fig. 7 is a partial view of A direction in Fig. 6;

Fig. 8 is a partial view of B direction in Fig. 6;

Fig. 9 is a top view of Fig. 7;

Fig. 10 is a schematic diagram of the electrical structure of Embodiment 2 of the present invention;

Fig. 11 is a structural diagram of the upper computer of Embodiment 2 of the present invention;

Fig. 12 is a flow chart of the host computer program in Embodiment 2 of the present invention.

Description of reference signs: 1-drive unit; 11-drive wheel; 111-rubber material; 112-steel wheel; 12-drive mobile platform; 13-drive wheel height adjustment mechanism; 131-drive swing gear; 132-drive wheel swing Gear plate center shaft; 133-drive wheel swing tooth plate; 134-drive wheel swing motor; 14-drive adjustment mechanism; 15-drive mobile device; 16-drive transmission mechanism; ; 163-transmission small pulley; 164-v-belt; 165-transmission large pulley; 166-transmission large gear; 17-drive motor; 2-speed limiter; 21-rope pulley; 3-detection unit; 32- detection mobile platform; 33- detection wheel height adjustment mechanism; 334- detection wheel swing motor; 34- detection adjustment mechanism; 35- detection mobile device; 37- encoder; 4- protective cover; 5- bench; 6- Compressing and fixing device; 61-pressing cylinder; 62-moving plate of fixing device; 63 pressing block; 64-fastening nut; 65-fixing rod; 66 fixing plate; 67 fastening rod; 71-adjust the limit block; 72-adjust the limit nut; 73-adjust the limit through hole.

Detailed ways

Embodiments of the present invention are described in detail below:

Example 1

As shown in Figure 1-3, a kind of elevator overspeed governor test bench comprises drive unit 1, detection unit 3, overspeed governor fixing device, stand 5; Described drive unit 1 comprises drive wheel 11 and drive motor 17, The drive wheel 11 is connected to the output end of the drive motor 17; the detection unit 3 includes a detection wheel 31 and an encoder 37, and the axle of the detection wheel 31 is connected to the encoder 37; the drive wheel 11 and the detection wheel 31 are all Press against the sheave 21 peripheral edge of overspeed governor 2; Described drive unit 1 also comprises driving regulating mechanism 14, and described driving regulating mechanism 14 comprises driving elastic thrust structure, promptly drives regulating spring, and described driving elastic thrust structure applies Forced on the driving wheel 11, the direction of its elastic force is consistent with the direction of the line connecting the center of the driving wheel 11 and the rope wheel 21; the detection unit 3 also includes a detection adjustment mechanism 34, and the detection adjustment mechanism 34 includes a detection elastic thrust structure, that is, detection Adjust the spring, the detection elastic thrust structure exerts force on the detection wheel 31, and the direction of its elastic force is consistent with the direction of the line connecting the detection wheel 31 and the center of the rope wheel 21.

By driving the adjustment mechanism 14 and the detection adjustment mechanism 34, the drive wheel 11 and the detection wheel 31 are all pressed against the rope pulley 21 with a suitable pressure, and by selecting a suitable elastic thrust structure, the drive wheel 11 and the detection wheel 31 are pressed at a suitable pressure. The pressing force is pressed on the rope wheel 21, and the dynamic adjustment pressing force will not be too large to hinder the rotation of the rope wheel 21, nor too small to cause lost rotation. The existence of the above features ensures that the driving wheel 11, the detection wheel 31 and the rope wheel 21 of the speed limiter 2 do not lose rotation, ensures the consistency of the linear speed among the three, overcomes the error caused by the hysteresis of the belt transmission, and has high precision. High and small error characteristics.

As shown in FIG. 4 , the driving wheel 11 and the detection wheel 31 are both rubber-coated wheels, preferably rubber-coated wheels whose outer circumference is covered with a rubber material 111 . The central part of the driving wheel 11 and the detection wheel 31 is a steel wheel 112 made of No. 45 steel;

Using rubber-coated wheels covered with rubber material 111, check "Friction Coefficients Between Commonly Used Materials" to get that the coefficient of dynamic friction between rubber and cast iron is 0.8, while the coefficient of dynamic friction between steel and cast iron is between 0.16 and 0.18. The former is It is 4 times that of the latter. Under the same pressing force, the friction force between rubber and cast iron is much higher than that between steel and cast iron. Secondly, rubber has a certain elasticity, which can perfectly absorb the friction generated by high-speed rotation. impact force, so that there is no jumping phenomenon between the rubberized wheel and the sheave 21, and the rubberized wheel also has the advantages of good friction and wear resistance.

The test stand is also provided with a safety shield 4 to ensure the safety of operators, and the stand 5 is used for fixing and installing the parts of the test stand.

The drive adjustment mechanism 14 also includes a drive adjustment platform slidable along the elastic direction of the driving elastic thrust structure, and the drive adjustment platform is slidably connected with the following drive mobile platform 12; the drive motor 17 and the drive wheel 11 are all installed on the On the driving and adjusting platform, one end of the driving elastic thrust structure is pressed against the driving and adjusting platform. In this embodiment, the other end is fixed on the following driving and moving platform 12, and the elastic force is transmitted through the driving and adjusting platform to drive the driving wheel 11 Compress on the sheave 21. Through the use of the driving adjustment platform, the driving elastic thrust structure exerts force on the driving motor 17 and the driving wheel 11 through the adjusting platform, so as to avoid axial deviation between the output end of the driving motor 17 and the driving wheel shaft and affect the rotation of the driving wheel 11.

The detection and adjustment mechanism 34 also includes a detection and adjustment platform that can slide along the elastic direction of the detection elastic thrust structure, and the detection and adjustment platform is slidingly connected with the following detection mobile platform 32; the encoder 37 and the detection wheel 31 are all installed on the detection and adjustment platform. On the adjustment platform, one end of the detection elastic thrust structure is pressed against the detection and adjustment platform. In this embodiment, the other end is fixed on the following detection mobile platform 32, and the elastic force is transmitted through the detection and adjustment platform to press the detection wheel 31. Tight on the sheave 21. Through the use of the detection and adjustment platform, the detection elastic thrust structure can apply force to the detection wheel 31 and the encoder 37 as a whole through the detection and adjustment platform, so as to avoid the axial deviation between the encoder 37 and the detection wheel 31 shaft, which will affect the detection result of the encoder 37 .

The drive unit 1 also includes a driving mobile platform 12 and a driving mobile device 15, the driving wheel 11, the driving motor 17 and the driving adjustment mechanism 14 are all installed on the driving mobile platform 12, and the driving mobile device 15 is connected to the driving mobile platform 12. The driving mobile platform 12 can move towards the speed limiter 2 rope pulley 21; the detection unit 3 also includes a detection mobile platform 32 and a detection movement device 35, and the detection wheel 31, an encoder 37 and a detection adjustment mechanism 34 are all installed on the detection mobile platform 32, the detection mobile device 35 is connected to the detection mobile platform 32; the detection mobile platform 32 can move towards the speed limiter 2 sheave 21 direction.

The distance between the two mobile platforms is adjusted by the mobile device, and then the distance between the driving wheel and the detection wheel 31 is adjusted, so that it can be adjusted according to different diameters of the rope pulley 21, so that the test bench can be used according to the speed limit during the test. It can be adjusted according to the different diameters of the sheave 21 of the device 2, and is not limited by the diameter of the sheave 21, so it has high test compatibility.

The driving and moving device 15 and the detecting and moving device 35 are air cylinders, which have the advantages of accurate and reliable movement.

The drive unit 1 also includes a drive wheel shaft mount 161 and a drive wheel height adjustment mechanism 13, the drive wheel 11 is mounted on the drive wheel shaft mount 161, and the drive wheel height adjustment mechanism 13 is connected to the drive wheel shaft mount 161; The detection unit 3 also includes a detection wheel shaft mounting seat and a detection wheel height adjustment mechanism 33, the detection wheel 31 is mounted on the detection wheel shaft mounting seat, and the detection wheel height adjustment mechanism 33 is connected to the detection wheel shaft mounting seat.

The test bench can be adjusted according to the center height of the speed governor 2 during the test, without being limited by the center height of the speed governor 2, and has high test compatibility.

The drive unit 1 also includes a drive transmission mechanism 16, which is connected to the output end of the drive motor 17 and the drive wheel shaft; the drive transmission mechanism 16 is a belt transmission mechanism.

As shown in Figure 5, the drive wheel height adjustment mechanism 13 includes a drive wheel swing motor 134, a drive wheel swing tooth plate 133, a drive swing gear 131, a drive wheel swing tooth plate center shaft 132; The output end of the wheel swing motor 134 is connected; the drive wheel swing tooth plate 133 is hinged and fixed by the drive wheel swing tooth plate central axis 132, and its two ends can swing up and down around the axis of the drive wheel swing tooth plate central axis 132; the drive wheel One end of the swing tooth plate 133 meshes with the drive swing gear 131, and the other end is connected to the drive wheel shaft mounting seat 161; the detection wheel height adjustment mechanism 33 includes a detection wheel swing motor 334, a detection wheel swing tooth plate, a detection swing gear, and a detection wheel swing tooth. Plate central axis; the detection swing gear is connected with the detection wheel swing motor 334; the detection wheel swing tooth plate is hinged and fixed through the detection wheel swing tooth plate central axis, and its two ends can be around the axis of the detection wheel swing tooth plate central axis Swing up and down; and one end of the swing tooth plate of the detection wheel meshes with the detection swing gear, and the other end is connected with the detection wheel shaft mounting seat. The height of the driving wheel 11 and the detection wheel 31 is adjusted by the swing motor, which has high reliability and can ensure the stability of the height of the driving wheel 11 and the detection wheel 31 during the experiment.

Described drive transmission mechanism 16 comprises transmission pinion 162, transmission small pulley 163, V-belt 164, transmission large pulley 165, transmission large gear 166; The belt 164 is transmitted to the transmission large pulley 165, the transmission large pulley 165 is connected to the transmission bull gear 166, the transmission bull gear 166 is meshed with the transmission pinion 162, and the transmission pinion 162 is connected to the drive wheel shaft. Through belt transmission, the relative position between the output end of the drive motor 17 and the drive wheel shaft can be allowed to change without affecting the transmission.

As shown in Figure 6, the speed governor fixing device includes a pressing and fixing device 6; 66, fastening rod 67, fastening nut 64; One end of described fixed rod 65 is connected to stand 5, and the other end is connected to fixed plate 66, and described compression cylinder 61 is fixed on the fixed plate 66, and the piston rod of compression cylinder 61 Connect the moving plate 62 of the fixing device, the moving plate 62 of the fixing device is slidably set on the fixing rod 65, and a sliding groove arranged along the front and rear direction is provided on it, the bottom of the sliding groove has a sliding through hole, and the pressing The block 63 is placed in the sliding groove, and a fastening through hole is provided in it, as shown in Figure 7, one end of the fastening rod 67 leans against the moving plate 62 of the fixing device, and the other end passes through the sliding through hole and the fastening The through hole is fixed by a fastening nut 64. Therefore, the base of the speed governor 2 is fixed on the bench 5, and the test bench can be adjusted according to the size and width of the base of the speed governor 2 during the test, without being limited by the size of the base, and has high test compatibility .

As shown in Figures 6 and 8, the speed governor fixing device also includes an adjustment limit device 7, that is, two adjustment limit blocks 71 and two adjustment limit nuts 72; Shaped adjustment limit through hole 73, as shown in FIG. The bit through hole 73 is fixed by adjusting the limit nut 72. Further, by adjusting the limit block 71, the position of the base of the speed limiter with different widths is limited to ensure the stability of the speed limiter 2 during the test.

Adopt the test bench of this embodiment to carry out the speed characteristic test procedure as follows:

1) Loosen the adjustment limit nut 72, move the adjustment limit block 71 to the two ends of the adjustment limit through hole 73, and then place the tested speed limiter 2 on the bench 5, according to the speed limiter Base size, move and adjust the limit block 71 so that the speed limiter 2 is in the middle of the driving wheel 11 and the detection wheel 31, then tighten the adjustment limit nut 72, then loosen the fastening nut 64, move back and forth to a suitable position, and then It is tightened to fix the pressing block 63 on the moving plate 62 of the fixing device, start the pressing cylinder 61, the piston rod of the pressing cylinder 61 descends, and drives the moving plate 62 of the fixing device to descend, thereby fixing the speed governor 2 with the pressing block 63 .

2) Start the drive wheel swing motor 134, so that the drive swing gear 131 rotates within a certain angle, and drives the drive wheel swing tooth plate 133 meshed with it to rotate around the central axis 132 of the drive wheel swing tooth plate, so that the drive wheel swing tooth plate 133 and the drive wheel swing tooth plate 133 The height of the other end connected to the axle mount 161 changes, thereby adjusting the height of the drive wheel 11; adopt the same method to adjust the height of the detection wheel 31, so that the height of the center of circle of the drive wheel 11, the rope wheel 21, and the detection wheel 31 is the same.

3) Start the cylinders of the driving mobile device 15 and the detecting mobile device 35, drive the driving mobile platform 12 and the detecting mobile platform 32 to move respectively, and make the driving wheel 11 and the detecting wheel 31 approach the speed limiter sheave 21, and then drive the elastic thrust structure Adjust the pressure with the detection elastic thrust structure; make the drive wheel 11 and the detection wheel 31 lean against the sheave 21 with an appropriate pressure, so as to ensure that the drive wheel 11, the detection wheel 31 and the sheave 21 of the speed governor 2 are not lost Rotate to ensure the consistency of the linear speed among the three, and dynamically adjust the pressing force so as not to be too large, hindering the rotation of the rope wheel 21.

4) Start the driving motor 17 to make the driving wheel 11 drive the rope wheel 21 to rotate, load a predetermined acceleration and deceleration curve to the motor through the cooperation of the control system and the servo controller, and detect the test data by the detection wheel 31, and the test data is provided by the encoder 37 collection, to complete the speed characteristic test.

Example 2

A kind of elevator overspeed governor testing system, comprises electrical part and mechanical part; Described mechanical part adopts the elevator overspeed governor test bench of above-mentioned embodiment 1; Described electrical part comprises computer, output device, programmable controller, servo amplifier And the photoelectric switch that is used to collect the mechanical switch action of speed limiter; The output device and the programmable controller are all electrically connected with the computer, and the programmable controller is connected with a servo amplifier, a photoelectric switch and an encoder 37; the servo amplifier A drive motor 17 is connected, and the drive motor 17 is a servo motor.

This test system can not only ensure that the driving wheel 11, the detection wheel 31 and the rope wheel 21 of the speed limiter 2 do not lose rotation, ensure the consistency of the linear speed among the three, overcome the error caused by the hysteresis of the belt transmission, and have high precision. With the characteristics of high precision and small error, it can also automatically collect data, and has the functions of data storage, data management, data backup and data output, so that personnel can monitor the testing process in real time.

The programmable controller is also connected to various mobile devices, height adjustment mechanisms, cylinders and other equipment in the above-mentioned elevator speed limiter test bed, and the operation of each equipment in the test bed is precisely controlled by the programmable controller to realize automatic control.

When the test system of this embodiment is used to test the characteristics of the elevator speed limiter, the computer performs overall control, including the management system of the whole system, automatic flow, data processing, data recording, data exchange with programmable logic controller (PLC) and report generation and Print. PLC is responsible for the logic control of the entire system, real-time data collection, system security protection and non-computer process control, but the premise is to receive the computer's operation permission instruction. The encoder 37 generates an output speed pulse and sends it to the counting port of the PLC. The PLC stores the data in the register, and the computer reads the relevant data from the PLC and displays it on the interface. The photoelectric switch is responsible for collecting the signal of the electrical action of the speed limiter. The switch button and indicator light are responsible for controlling and instructing the power start, pneumatic clamping, pneumatic release and other functions of the test bench. The above electrical structure is shown in Figure 10.

The software used by the computer is mainly responsible for the operation control, data communication and data recording of the test bench. According to the above required functions, the software program of the upper computer is developed using Visual Basic 6.0, the test data is recorded using the Access database, and the report output is through calling Excel. To complete, its structure diagram and flow chart are shown in Figure 11-12.

Adopt the test system of this embodiment to carry out the speed characteristic test procedure as follows:

1) Loosen the adjustment limit nut 72, move the adjustment limit block 71 to the two ends of the adjustment limit through hole 73, and then place the tested speed limiter 2 on the bench 5, according to the speed limiter 2 base size, move and adjust the limit block 71 so that the speed limiter 2 is in the middle of the driving wheel 11 and the detection wheel 31, then tighten the adjustment limit nut 72, then loosen the fastening nut 64, move back and forth to a suitable position, and then Tighten it and fix the pressing block 63 on the moving plate 62 of the fixing device, start the pressing cylinder 61, the piston rod of the pressing cylinder 61 descends, and drive the moving plate 62 of the fixing device to descend, thereby pressing the speed limiter 2 with the pressing block 63 fixed.

2) Start the drive wheel swing motor 134, so that the drive swing gear 131 rotates within a certain angle, and drives the drive wheel swing tooth plate 133 meshed with it to rotate around the central axis 132 of the drive wheel swing tooth plate, so that the drive wheel swing tooth plate 133 and the drive wheel swing tooth plate 133 The height of the other end connected to the axle mount 161 changes, thereby adjusting the height of the drive wheel 11; adopt the same method to adjust the height of the detection wheel 31, so that the height of the center of circle of the drive wheel 11, the rope wheel 21, and the detection wheel 31 is the same.

3) Start the cylinders of the driving mobile device 15 and the detection mobile device 35, drive the driving mobile platform 12 and the detection mobile platform 32 to move respectively, make the driving wheel 11 and the detection wheel 31 approach the speed limiter 2 rope pulley 21, and then drive the elastic thrust structure and detection elastic thrust structure to adjust the pressure; make the drive wheel 11 and the detection wheel 31 lean against the sheave 21 with an appropriate pressure, so as to ensure that the drive wheel 11, the detection wheel 31 and the sheave 21 of the speed governor 2 are not Throwing and turning ensures the consistency of the linear speed among the three, and also dynamically adjusts the pressing force so as not to be too large, hindering the rotation of the rope wheel 21.

4) Start the software to enter the speed test interface of the elevator speed limiter, input the corresponding parameters of the speed limiter 2 to start the test.

5) The whole process of the test is controlled by the computer, and the test data is automatically recorded and output by the output device, and stored in the database at the same time for later call.

The above-mentioned embodiments only express the specific implementation manner of the present invention, and the description thereof is relatively specific and detailed, but should not be construed as limiting the patent scope of the present invention. It should be pointed out that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention.

Claims (9)

1. a kind of elevator overspeed governor test stand, comprises drive unit, detection unit, overspeed governor fixture, stand; Described drive unit comprises drive wheel and drive motor, and described drive wheel is connected with drive motor output end; The detection unit includes a detection wheel and an encoder, and the axle of the detection wheel is connected to the encoder; It is characterized in that both the drive wheel and the detection wheel are pressed against the peripheral edge of the sheave of the speed governor; The drive unit also includes a drive adjustment mechanism, the drive adjustment mechanism includes a drive elastic thrust structure, and the drive elastic thrust structure exerts force on the drive wheel, and the direction of its elastic force is consistent with the direction of the line connecting the drive wheel and the center of the sheave; The detection unit also includes a detection and adjustment mechanism. The detection and adjustment mechanism includes a detection elastic thrust structure, and the detection elastic thrust structure exerts force on the detection wheel, and the direction of its elastic force is consistent with the direction of the line connecting the detection wheel and the rope wheel. 2. The elevator overspeed governor test bench according to claim 1, characterized in that, the drive wheel and the detection wheel are rubber-coated wheels. 3. elevator overspeed governor test bench according to claim 1, is characterized in that, described drive adjustment mechanism also comprises the drive adjustment platform slidable along the elastic force direction of drive elastic thrust structure, and described drive motor, driving wheel all Installed on the driving adjustment platform, one end of the driving elastic thrust structure is pressed against the driving adjustment platform, and the other end is fixed, and the elastic force is transmitted through the driving adjustment platform to press the driving wheel on the rope wheel. 4. The elevator overspeed governor test bench according to claim 1, characterized in that, the detection and adjustment mechanism also includes a detection and adjustment platform slidable along the elastic direction of the detection elastic thrust structure, and the encoder and the detection wheel are all installed On the detection and adjustment platform, one end of the detection elastic thrust structure is pressed against the detection and adjustment platform, and the other end is fixed, and the elastic force is transmitted through the detection and adjustment platform to press the detection wheel on the rope wheel. 5. according to the described elevator overspeed governor test stand of any one of claim 1-4, it is characterized in that, described driving unit also comprises driving mobile platform and driving mobile device, and described driving wheel, driving motor and driving adjustment mechanism Both are installed on the driving mobile platform, and the driving mobile device is connected to the driving mobile platform; the driving mobile platform can move towards the direction of the speed limiter sheave; And/or the detection unit also includes a detection mobile platform and a detection mobile device, the detection wheel, encoder and detection adjustment mechanism are all installed on the detection mobile platform, and the detection mobile device is connected to the detection mobile platform; the detection mobile The platform can move in the direction of the speed limiter sheave. 6. The elevator overspeed governor test bench according to any one of claims 1-4, wherein the drive unit also includes a drive wheel shaft mount, a drive wheel height adjustment mechanism, and the drive wheel is installed on the drive wheel shaft On the mounting seat, the driving wheel height adjustment mechanism is connected with the driving wheel shaft mounting seat; And/or the detection unit further includes a detection wheel shaft mounting seat and a detection wheel height adjustment mechanism, the detection wheel is mounted on the detection wheel shaft mounting seat, and the detection wheel height adjustment mechanism is connected to the detection wheel shaft mounting seat. 7. The elevator overspeed governor test bench according to claim 1, characterized in that, said overspeed governor fixing device comprises a pressing and fixing device, and the pressing and fixing device comprises a pressing cylinder, a fixing device moving plate, and a pressing and fixing device. block, fixed rod, fixed plate, fastening rod, fastening nut; one end of the fixed rod is connected to the stand, and the other end is connected to the fixed plate, the compression cylinder is fixed on the fixed plate, and the piston rod of the compression cylinder is connected and fixed The moving plate of the device, the moving plate of the fixing device is slidably set on the fixed rod, and a sliding groove is arranged on it, and a sliding through hole is opened at the bottom of the sliding groove, and the pressing block is placed in the sliding groove, and the There is a fastening through hole, one end of the fastening rod leans against the moving plate of the fixing device, the other end passes through the sliding through hole and the fastening through hole, and is fixed by a fastening nut. 8. elevator overspeed governor test bench according to claim 1, is characterized in that, described overspeed governor fixing device also comprises adjustment limit device; Described adjustment limit device comprises adjustment limit block and adjustment limit nut The platform is provided with a strip-shaped adjustment limit through hole, one end of the adjustment limit block is against the platform, and the other end passes through the adjustment limit through hole, and is fixed by the adjustment limit nut. 9. A testing system for an elevator overspeed governor, comprising an electrical part and a mechanical part; it is characterized in that the said mechanical part adopts the elevator overspeed governor test bench according to any one of claims 1-8; said electrical part comprises computer, output device, programmable controller, servo amplifier, and a photoelectric switch for collecting the electrical action signal of the speed limiter; the output device and the programmable controller are electrically connected to the computer, and the programmable controller is connected to the servo amplifier , a photoelectric switch and an encoder; the servo amplifier is connected to the drive motor.

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