Testing device and method for testing performance of elevator speed governor

Abstract

The invention relates to a test device and method for testing the performance of an elevator speed governor, and the device comprises a test rack which is internally provided with a lifting channel for testing; the main rope is hung and wound on the traction machine; the undercarriage is arranged on one side of the traction machine and connected to the main rope, and the car frame is arranged below the undercarriage and connected with the undercarriage through a detacher; the counterweight frame is arranged on the other side of the traction machine and is connected to the main rope; the speed limiter is arranged at the top of the test rack; the rope gripper is arranged at the top of the test rack; and the data acquisition unit is used for acquiring the running speed of the lift car frame, the wheel speed of the speed limiter, the lifting force of the speed limiting rope, an electrical action signal and a mechanical action signal. The performance of the speed governor can be tested under the working conditions that the lift car frame freely falls when running at a rated speed and the lift car frame falls downwards at different accelerations in a static state.

Description

Technical Field

[0001] The invention relates to the technical field of speed governor testing, and in particular to a test device and a method for testing the performance of an elevator speed governor. Background Art

[0002] When conducting a free fall test of a speed limiter, a winch is usually used to control the car frame to move up and down, and the car frame is lifted to the test height. The car frame starts a free fall test from a stationary state. Since the running speed of the winch is relatively low, usually not exceeding 0.5m / s, and the rated speed of the elevator speed limiter is usually above 1m / s, the existing test device cannot simulate the worst working condition of the elevator car falling freely when the elevator car is running at the rated speed. In addition, the car frame lacks the necessary speed control mechanism. During the simulation process, once the car frame is released, it can only perform free fall motion, and its falling speed and acceleration cannot be flexibly adjusted or controlled. Moreover, it cannot simulate the elevator car in a stationary state, and the acceleration and fall conditions at different accelerations due to the failure of the braking force or traction force. Therefore, how to develop a test device for testing the performance of the speed limiter under simulated elevator dangerous conditions, which can not only meet the needs of high-speed operation simulation, but also flexibly control the acceleration and deceleration process of the car, is a problem that urgently needs to be solved. Summary of the invention

[0003] In view of the technical problems existing in the prior art, the first object of the present invention is to provide a test device for testing the performance of an elevator speed limiter, which can test the speed limiter performance under the conditions of free fall of the car frame when running at rated speed and falling downward at different accelerations in a stationary state.

[0004] A second object of the present invention is to provide a method for utilizing a test device for testing the performance of an elevator speed governor.

[0005] In order to achieve the above object, the present invention adopts the following technical solution:

[0006] A test device for testing the performance of an elevator speed limiter, the test device comprising: a vertically arranged test frame, wherein a lifting channel for testing is formed inside the test frame; a main rope hung on a traction machine on the top of the test frame; a landing gear, which is arranged on one side of the traction machine and connected to the main rope, the landing gear moves up and down in the lifting channel, a car frame which is arranged below the landing gear and connected by a decoupling device, the decoupling device is used to separate the landing gear from the car frame; a counterweight frame, which is arranged on the other side of the traction machine and connected to the main rope, the counterweight frame moves in the lifting channel with the movement of the landing gear; a speed limiter, which is arranged on the top of the test frame and hung with a speed limiting rope, one end of the speed limiting rope is connected to connected to the top of the car frame, the other end of the speed limiting rope is hung around the first guide wheel arranged at the bottom of the lifting channel and connected to the bottom of the car frame, and the speed limiter is used to monitor the running speed of the car frame; a rope clamp is arranged at the top of the test frame and clamps the rope clamp, one end of the rope clamp is connected to the top of the car frame, and the other end of the rope clamp is hung around the second guide wheel arranged at the bottom of the lifting channel and connected to the bottom of the car frame, and the rope clamp is used to control the speed of the car frame when falling; a data collector is used to collect the running speed of the car frame, the wheel speed of the speed limiter, the lifting force of the speed limiting rope, the electrical action signal of the speed limiter and the mechanical action signal of the speed limiter.

[0007] Furthermore, an acceleration sensor and a lifting force sensor are configured on the top of the car frame. The acceleration sensor is used to collect the acceleration of the car frame. The lifting force sensor is connected to one end of the speed limiting rope and is used to collect the lifting force of the speed limiting rope. The acceleration sensor and the lifting force sensor are electrically connected to the data collector respectively.

[0008] Furthermore, it also includes a speed test component and a mechanical action test component, the speed test component includes a support frame arranged on the top of the test frame and a speed sensor arranged at one end of the support frame, the speed sensor is provided with a speed measuring wheel for testing the speed of the speed limiter wheel, the mechanical action test component includes a magnetic meter stand arranged on the top of the test frame and a magnetic induction switch arranged at one end of the magnetic meter stand for testing the mechanical action speed of the speed limiter, the speed sensor and the magnetic induction switch are electrically connected to the data collector respectively.

[0009] Furthermore, an electrical switch for detecting the electrical operating speed of the speed limiter is provided on the side of the speed limiter, and the electrical switch is electrically connected to the data collector.

[0010] Furthermore, a laser displacement sensor is disposed at the bottom of the lifting channel and is located below the car frame, and is used to monitor the position of the car frame in the lifting channel.

[0011] Furthermore, it also includes a control unit, which is arranged on the top of the test frame, and the control unit is electrically connected to the traction machine, the unhooking device and the speed limiter respectively, and the data collector is located inside the control unit.

[0012] Furthermore, a first tensioner for adjusting the tension of the speed limiting rope is provided at the lower part of the first guide wheel, and a first jacking device for adjusting the height of the first guide wheel is provided at the lower part of the first tensioner; a second tensioner for adjusting the tension of the rope clamping rope is provided at the lower part of the second guide wheel, and a second jacking device for adjusting the height of the second guide wheel is provided at the lower part of the second tensioner.

[0013] Furthermore, a car frame buffer and a counterweight frame buffer are provided at the bottom of the lifting channel, the car frame buffer is located below the car frame, and the counterweight frame buffer is located below the counterweight frame.

[0014] Furthermore, the interior of the lifting channel also includes a first guide rail and a second guide rail, a first pulley is provided on both sides of the landing gear, a second pulley is provided on both sides of the car frame, the first pulley and the second pulley are respectively slidably connected to the first guide rail, a limit switch is provided on the upper part of the first guide rail and is located above the landing gear, and a third pulley is provided on both sides of the counterweight frame, and the third pulley is slidably connected to the second guide rail.

[0015] A method for using the above-mentioned test device for testing the performance of an elevator speed limiter, the method comprising: adjusting the weight of the counterweight frame and the car frame according to the test requirements; placing the unhooking device in a hooked state, and driving the landing gear and the car frame to rise to a predetermined test height through the traction machine; when performing a free fall test of the car frame at a rated speed, driving the car frame to a downward test speed through the traction machine, and then controlling the unhooking device to automatically unhook, so that the car frame freely falls under the action of gravity, thereby triggering the action of the speed limiter; when performing a free fall test of the car frame at a rated speed, During the fall test with different accelerations, the car frame is driven to the test height by the traction machine and is in a stationary state. According to the acceleration requirement, the clamping force of the rope clamp on the rope clamp is adjusted, and the unhooking device is controlled to be unhooked, so that the car frame falls at the set acceleration, thereby triggering the speed limiter to operate; the data collector collects and records the acceleration of the car frame, the wheel speed of the speed limiter, the pulling force of the speed limiter rope, the electrical action signal of the speed limiter, and the mechanical action signal of the speed limiter; the car frame falls to the bottom of the lifting channel to complete the test.

[0016] The present invention has the following advantages:

[0017] 1. The test device of the present invention uses traction drive to drag the car frame to ensure that the car frame can reach the rated speed of the speed limiter. When the car frame reaches the rated speed downward, the unhooking device is remotely controlled to separate the landing gear and the car frame, and the car frame begins a free fall test at the rated speed to simulate the worst working condition of the speed limiter and improve the inherent safety level of the speed limiter. Compared with the winch drive, the traction machine is in a power generation state during the heavy load downward and light load upward process, which not only reduces the power required to lift the car frame of the same weight, but also saves electricity, further improving the environmental protection and energy saving level of the laboratory.

[0018] 2. The test device of the present invention is equipped with a lifting force sensor and an acceleration sensor on the top of the car frame, and communicates in real time with the microcomputer controller in the control unit through the accompanying cable. It can also quickly follow the car frame and run synchronously during the free fall of the car frame to avoid the disconnection of the sensor signal during the test. A laser displacement sensor is set at the bottom of the lifting channel to collect the position information of the car frame, which is convenient for setting the falling height of the car frame and improving the test quality and efficiency.

[0019] 3. The rope clamp of the present invention is arranged on the top of the test frame and clamps the rope clamp, thereby generating a braking force, so that the falling acceleration of the car frame is controlled within the test range, and the speed limiter performance is tested under the condition that the car frame falls downward at different accelerations in a static state. In addition, a pressure sensor is provided, and the clamping force of the rope clamp can be adjusted according to the test acceleration to improve the test quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The present invention is a front view of a test device for testing the performance of a speed limiter under a simulated dangerous working condition of an elevator.

[0021] Figure 2 It is a side view of a test device for testing the performance of a speed limiter under a simulated dangerous working condition of an elevator according to the present invention.

[0022] Figure 3 It is a structural schematic diagram of the speed limiter of the present invention.

[0023] Figure 4 It is a three-dimensional structural schematic diagram of the rope clamp of the present invention.

[0024] Figure 5 It is a top view of the rope clamp of the present invention.

[0025] Figure 6 It is a three-dimensional structural schematic diagram of the first clamping plate and the second clamping plate of the present invention.

[0026] Figure 7 It is a cross-sectional view of the traction sheave of the present invention.

[0027] Figure 8 It is a front view of a test device with a safety clamp according to the present invention.

[0028] Fig. 9 It is a control flow chart of the test device of the present invention.

[0029] Among them, 1 is a test frame, 101 is a lifting channel, 102 is a laser displacement sensor, 103 is a first tensioner, 104 is a first jacking device, 105 is a second tensioner, 106 is a second jacking device, 107 is a car frame buffer, 108 is a counterweight frame buffer, 109 is a first guide rail, 109a is a limit switch, 110 is a second guide rail, 2 is a traction machine, 201 is a main rope, 202 is a driving host, 203 is a brake, 204 is a first A support, 205 is a traction wheel, 205a is a wheel groove, 3 is a landing gear, 301 is a first pulley, 4 is a car frame, 401 is an acceleration sensor, 402 is a lifting force sensor, 403 is a second pulley, 404 is a traveling cable, 5 is a counterweight frame, 501 is a third pulley, 6 is a decoupler, 7 is a speed limiter, 701 is a speed limit rope, 702 is a first guide wheel, 703 is a speed test assembly, 703a is a support frame, 703a1 is a first support 703a2 is a second support rod, 703b is a speed sensor, 703c is a speed measuring wheel, 704 is a mechanical action test assembly, 704a is a magnetic table seat, 704b is a magnetic induction switch, 705 is an electrical switch, 8 is a rope clamp, 801 is a housing, 801a is a threaded hole, 801b is an extension column, 802 is a first slide plate, 803 is a second slide plate, 804 is a third slide plate, 805 is a compression spring, 806 is a guide rod, 807 is a guide rod, 808 is a guide rod, 809 is a guide rod, 810 is a guide rod, 811 is a guide rod, 812 is a guide rod, 813 is a guide rod, 814 is a guide rod, 815 is a guide rod, 816 is a guide rod, 817 is a guide rod, 818 is a guide rod, 819 is a guide rod, 820 is a guide rod, 821 is a guide rod, 822 is a guide rod, 823 is a guide rod, 824 is a guide rod, 825 is a guide rod, 826 is a guide rod, 827 is a guide rod, 828 is a guide rod, 829 is a guide rod, 830 is a guide rod, 831 is a guide rod, 832 is a guide rod, 833 is a guide rod, 834 is a guide rod, 835 is a guide rod, 836 is a guide rod, 837 is a guide rod, 838 is a guide rod, 839 is a guide rod, 840 is a guide rod, 841 is a guide rod, 842 is a guide rod, 843 is a guide rod, 844 is a guide rod, 845 is a guide rod, is the first clamping plate, 807a is the first protrusion, 807b is the arc groove, 808 is the second clamping plate, 808a is the second protrusion, 808b is the plane, 809 is the pressure sensor, 810 is the hand crank, 811 is the screw, 812 is the clamping space, 8a is the rope clamp, 8b is the second guide wheel, 8c is the third guide wheel, 8d is the second support, 8e is the third support, 9 is the control unit, 10 is the safety clamp, 10a is the lifting rod, and 10b is the connecting rod. DETAILED DESCRIPTION

[0030] The following description is essentially only exemplary and is not intended to limit the present invention, its application or use. It will be further understood that the term "include" and / or "comprising" specifies the existence of the features, wholes, steps, operations, elements and / or parts described when used in this specification, but does not exclude the existence of one or more other features, wholes, steps, operations, elements, parts and / or its groups or add one or more other features, wholes, steps, operations, elements, parts and / or its groups. As used in this article, the term "and / or" includes any and all combinations of one or more of the associated listed items. It will be understood that when an element, component and / or part is referred to as "connected to another element, component and / or part", it can be directly connected to another element, component and / or part, or there can be an intermediate element. It will be understood that although the terms "first", "second" and the like can be used to describe various elements, components and / or parts in this article, these elements, components and / or parts should not be limited by these terms. These terms are only used to distinguish an element, component or part from another element, component or part. Therefore, the first element, part or part discussed below can be referred to as the second element, part or part without departing from the teaching of the present invention. Unless otherwise defined, all terms (including technical terms and scientific terms) used in this article have the same meanings as those commonly understood by those of ordinary skill in the field to which the present invention belongs. It will be further understood that terms such as those defined in commonly used dictionaries should be interpreted as having meanings consistent with their meanings in the relevant field and / or the context of this specification, and will not be interpreted in an idealized or overly formal sense, unless clearly defined in this article.

[0031] It should be understood that, in order to clearly show the contents therein, the drawings herein are not drawn to scale, and the same or similar reference numerals indicate the same or similar components or parts. In addition, it should be understood that any embodiments described in this application and the technical features included therein can be combined with each other.

[0032] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0033] like Figure 1 and Figure 2 As shown, a test device for testing the performance of an elevator speed limiter mainly includes a test frame 1, a traction machine 2, a landing gear 3, a counterweight frame 5, a speed limiter 7, a rope clamp and a control unit 9, wherein the test frame 1 is arranged vertically, and a test bench is provided on the top thereof for carrying various test equipments, and a lifting channel 101 for testing is formed inside the test frame 1, and the lifting channel 101 is arranged along the height direction of the test frame 1 to simulate the shaft of an actual elevator.

[0034] Continue to refer to Figure 1 and Figure 2 The traction machine 2 is arranged on the top of the test frame 1, that is, it is carried on the test bench, and the main rope 201 is hung on the traction machine 2 on the top of the test frame 1. The traction machine 2 includes a first support 204, on which a driving main machine 202 and a traction wheel 205 arranged in series are arranged. The driving main machine 202 uses a permanent magnet synchronous main machine to save installation space. The traction wheel 205 is circumferentially provided with a plurality of wheel grooves 205a, and the main rope 201 is hung in the wheel groove 205a. The shape of the wheel groove 205a can be V-shaped, U-shaped, semicircular or other shapes that can clamp the main rope 201. In this embodiment, the shape of the wheel groove 205a is V-shaped, and the angle of the V-shaped wheel groove 205a is 20-60°. Among them, the number of wheel grooves 205a of the traction wheel 205 is five, corresponding to five main ropes 201 hung, and the number of wheel grooves 205a can be configured according to the number of main ropes 201, such as one, two, four, etc. A brake 203 for braking the traction wheel 205 is correspondingly arranged on the outside of the traction wheel 205. The brake 203 is electrically connected to the control unit 9. There are two brakes 203. The two brakes 203 are symmetrically arranged and correspond to the outside of the traction wheel 205 respectively. The two brakes 203 operate independently to prevent one of the brakes 203 from failing and causing a falling accident.

[0035] Continue to refer to Figure 1 and Figure 2 The landing gear 3 is arranged on one side of the traction machine 2 and connected to the main rope 201. The landing gear 3 moves up and down in the lifting channel 101. The car frame 4 is arranged below the landing gear 3 and connected through the unhooking device 6. A plurality of counterweights are arranged inside the car frame 4. The number of counterweights can be adjusted according to the test requirements. The unhooking device 6 is used to separate the landing gear 3 and the car frame 4. The unhooking device 6 wirelessly remotely controls the hook and the hook drop through the control unit 9 to make the car frame 4 fall freely. The unhooking device 6 can be a flip claw type automatic unhooking device, a remote control hook automatic unhooking device or a wireless electric automatic unhooking device, etc. Among them, an acceleration sensor 401 is arranged on the top of the car frame 4. The acceleration sensor 401 is used to collect the acceleration of the car frame 4. One end of the acceleration sensor 401 is also connected to a traveling cable 404. The acceleration sensor 401 is electrically connected to the data collector through the traveling cable 404.

[0036] The counterweight frame 5 is arranged on the other side of the traction machine 2 and connected to the main rope 201. The counterweight frame 5 moves in the lifting channel 101 along with the movement of the landing gear 3. A plurality of counterweight blocks are arranged inside the counterweight frame 5. The number of counterweight blocks can be adjusted according to the weight requirement of the car frame 4 to ensure that the traction force of the car frame 4 is not insufficient during the installation of the counterweight.

[0037] like Figure 2As shown, the interior of the lifting channel 101 further includes a first guide rail 109 and a second guide rail 110, which are both arranged along the height direction of the lifting channel 101 and are parallel to each other, a first pulley 301 is arranged on both sides of the landing gear 3, and a second pulley 403 is arranged on both sides of the car frame 4, the first pulley 301 and the second pulley 403 are respectively slidably connected to the first guide rail 109, and the number of the first pulley 301 and the second pulley 403 are both four , four first pulleys 301 and four second pulleys 403 are respectively arranged on the upper and lower sides of the landing gear 3 and the car frame 4. Through the cooperation of the pulleys and the guide rails, the landing gear 3 and the car frame 4 can slide up and down along the lifting channel 101, and the upper part of the first guide rail 109 is provided with a limit switch 109a and is located above the landing gear 3. A striker is installed on the landing gear 3. When the height of the landing gear 3 exceeds the limit position, the striker triggers the limit switch 109a to stop the landing gear 3. The third pulley 501 is arranged on both sides of the counterweight frame 5. The third pulley 501 is slidably connected with the second guide rail 110, so that the counterweight frame 5 can slide up and down along the lifting channel 101.

[0038] like Figure 2 As shown, a car frame buffer 107 and a counterweight frame buffer 108 are provided at the bottom of the lifting channel 101. The car frame buffer 107 is located below the car frame 4, and the counterweight frame buffer 108 is located below the counterweight frame 5. The car frame buffer 107 and the counterweight frame buffer 108 are respectively used to buffer the impact force when the car frame 4 or the counterweight frame 5 falls or squats.

[0039] like Figure 2 As shown, a laser displacement sensor 102 is disposed at the bottom of the lifting passage 101 and is located below the car frame 4 , and is used to monitor the position of the car frame 4 in the lifting passage 101 .

[0040] The traction force on the traction sheave 205 should meet the following requirements. The mass of the counterweight frame 5 is m, and the mass of the fully loaded car frame 4 is M 轿厢 , the weight of landing gear 3 is M 起落 , the wheel groove 205a of the traction sheave 205 adopts a hardened V-shaped groove with a groove angle of γ, then the equivalent friction coefficient of the wheel groove 205a of the traction sheave 205 is:

[0041]

[0042] When the car frame 4 is in a fully loaded state and the car frame 4 and the landing gear 3 are in a connected state, the traction conditions of the test device shall meet the following requirements:

[0043]

[0044] When the car frame 4 and the landing gear 3 are in the separated state, the traction conditions of the test device shall meet the following requirements:

[0045]

[0046] like Figure 7 As shown, in this embodiment, the weight of the landing gear 3 is 100 kg, the maximum weight of the car frame 4 is 300 kg, the weight of the counterweight frame 5 is 200 kg, the traction sheave 205 adopts a hardened V-groove, and the angle α of the groove 205a is 30°. Then the equivalent friction coefficient of the groove 205a of the traction sheave 205 is:

[0047] f=0.1 / sin(30° / 2)=0.386

[0048] The wrap angle of the traction sheave 205 is 180°. To ensure the operation of the test device, the ratio of the tension of the main rope 201 of the traction sheave 205 should satisfy the following formula:

[0049]

[0050] When the car frame 4 is in a fully loaded state and the car frame 4 and the landing gear 3 are in a connected state, the traction conditions of the test device meet the requirements:

[0051]

[0052] When the car frame 4 and the landing gear 3 are in a separated state, the traction condition of the test device meets the requirements:

[0053] m1 = 200 =2≤3.36

[0054] M 起落 100

[0055] When the car frame 4 is in a fully loaded state and the car frame 4 and the landing gear 3 are in a separated state, sufficient traction force can be generated between the main rope 201 and the traction wheel 205 to ensure that the landing gear 3 and the counterweight frame will not fall or hit the top.

[0056] Next refer to Figure 1 and Figure 3The speed limiter 7 is arranged on the top of the test frame 1 and is hung with a speed limit rope 701. One end of the speed limit rope 701 is connected to the top of the car frame 4. A lifting force sensor 402 is correspondingly arranged on the top of the car frame 4. The lifting force sensor 402 is connected to one end of the speed limit rope 701 and is used to collect the lifting force of the speed limit rope 701. The lifting force sensor 402 is also connected to an accompanying cable 404. The lifting force sensor 402 is electrically connected to the data collector through the accompanying cable 404. The lifting force sensor 402 adopts an S-type force sensor with a maximum range of 10000N. The other end of the speed limit rope 701 is hung on the first guide wheel 702 arranged at the bottom of the lifting channel 101 and connected to the bottom of the car frame 4. The speed limiter 7 is used to monitor the running speed of the car frame 4. The first tensioner 103 for adjusting the tension of the speed limit rope 701 is arranged at the lower part of the first guide wheel 702, and the first jacking device 104 for adjusting the height of the first guide wheel 702 is arranged at the lower part of the first tensioner 103. When the speed limit rope 701 of the speed limiter 7 needs to be replaced, the first jacking device 104 is first used to lift up the first tensioner 103, and then the height position of the first guide wheel 702 is adjusted to make the speed limit rope 701 of the speed limiter 7 in a relaxed state, and then the speed limit rope 701 is replaced with a new speed limit rope 701, and finally the first jacking device 104 is reset to re-tension the speed limit rope 701. The tensioner can be an elastic tensioner, a chain tensioner or a steel belt tensioner, etc., and the jacking device adopts a manual hydraulic jacking device, and the tensioner is raised and lowered by manually operating the jacking device. Of course, it can also be a single-seat jacking device, a double-seat jacking device or a suspension jacking device, etc.

[0057] Among them, the speed limiter 7 is installed on the first support 204, and the top of the test frame 1 is equipped with a speed test component 703, a mechanical action test component 704 and an electrical switch 705. The speed test component 703 includes a support frame 703a arranged on the top of the test frame 1 and a speed sensor 703b arranged at one end of the support frame 703a. The speed sensor 703b is provided with a speed measuring wheel 703c for testing the wheel speed of the speed limiter 7. The speed sensor 703b uses a speed measuring generator. During the test, the speed measuring wheel 703c is placed on the wheel of the speed limiter 7 to test the wheel speed of the speed limiter 7, and the obtained value is collected by the speed sensor 703b. Among them, the support frame 703a includes a first support rod 703a1 and a second support rod 703a2, the first support rod 703a1 can be rotatably connected to the second support rod 703a2, and the end of the second support rod 703a2 is connected to the speed sensor 703b, and the positions of the speed sensor 703b and the speed measuring wheel 703c on the speed limiter 7 are adjusted by rotating the second support rod 703a2. Specifically, the first support rod 703a1 is vertically arranged on the top of the test frame 1, and the first support rod 703a1 and the second support rod 703a2 are both provided with a plurality of connecting holes, which are fixed to the corresponding connecting holes of the first support rod 703a1 and the second support rod 703a2 by bolts to adjust the height and inclination angle of the second support rod 703a2, thereby adjusting the positions of the speed sensor 703b and the speed measuring wheel 703c on the speed limiter 7. The mechanical action test assembly 704 includes a magnetic meter base 704a disposed on the top of the test stand 1 and a magnetic induction switch 704b disposed at one end of the magnetic meter base 704a for testing the mechanical action speed of the speed limiter 7, and the magnetic induction switch 704b is close to the mechanical action part of the speed limiter 7. The electrical switch 705 is located on the side of the speed limiter 7, and is used to detect the electrical action speed of the speed limiter 7.

[0058] like Figure 4-6As shown, the rope clamp 8 is arranged on the top of the test frame 1 and clamps the rope clamp 8a. One end of the rope clamp 8a is connected to the top of the car frame 4, and the other end of the rope clamp 8a is hung around the second guide wheel 8b arranged at the bottom of the lifting channel 101 and connected to the bottom of the car frame 4. The rope clamp 8 is used to control the speed of the car frame 4 when it falls. The lower part of the second guide wheel 8b is provided with a second tensioner 105 for adjusting the tension of the rope clamp 8a, and the lower part of the second tensioner 105 is provided with a second jacking device 106 for adjusting the height of the second guide wheel 8b. When the rope clamp 8a needs to be replaced, the second jacking device 106 is first used to lift up the second tensioner 105, and then the height position of the second guide wheel 8b is adjusted to make the rope clamp 8a in a relaxed state, and then the rope clamp 8a is replaced with a new rope clamp 8a, and finally the second jacking device 106 is reset, and the speed limit rope 701 is re-tensioned. The tensioner can be an elastic tensioner, a chain tensioner or a steel belt tensioner, etc., and the jacking device adopts a manual hydraulic jacking device, and the tensioner is raised and lowered by manually operating the jacking device. Of course, the jacking device can also be a single-seat jacking device, a double-seat jacking device or a suspension jacking device, etc. Among them, a third support 8e is arranged on the top of the test frame 1, and a third guide wheel 8c is arranged on the third support 8e. The third guide wheel 8c is located above the rope clamp 8, and the rope clamping rope 8a is hung on the third guide wheel 8c, so that one end of the rope clamping rope 8a is first hung on the third guide wheel 8c and then connected to the top of the car frame 4.

[0059] Continue to refer to Figure 4-6 The rope clamp 8 comprises a shell 801 with an open top, and the shell 801 is supported on the top of the test frame 1 through a second support 8d, wherein the top of the shell 801 is open to form an opening, and the bottom of the shell 801 has a through groove for receiving the rope clamping rope 8a, and a first slide plate 802, a second slide plate 803 and a third slide plate 804 are slidably provided inside the shell 801 along its length direction, which are vertically arranged inside the shell 801 and parallel to each other to divide the space inside the shell 801 into a power chamber, a pressurizing chamber, a clamping chamber and a pressure sensing chamber, and the rope clamping rope 8a is located in the clamping chamber. At least one guide rod 806 is provided inside the housing 801, and the guide rod 806 is extended and fixed along the length direction of the housing 801 to connect the first slide plate 802, the second slide plate 803 and the third slide plate 804 in series, so that the first slide plate 802, the second slide plate 803 and the third slide plate 804 can stably slide along the length direction of the housing 801, wherein the first slide plate 802, the second slide plate 803 and the third slide plate 804 are all provided with guide holes corresponding to the guide rod 806. There are two guide rods 806, and the two guide rods 806 are respectively located near two opposite inner side walls of the housing 801.

[0060] Continue to refer to Figure 4-6The power chamber includes a screw 811, one end of which is rotatably connected to one side of the first slide 802, and the other end of the screw 811 extends to the outside of the side wall of the housing 801 and is provided with a hand crank 810 or a motor for driving the screw 811 to rotate, and the first slide 802 can be moved inside the housing 801 along the length direction of the housing 801 by rotating the screw 811, wherein the screw 811 is substantially parallel to the length direction of the housing 801. The side wall of the housing 801 is provided with a threaded hole 801a matched with the screw 811, and the screw 811 extends to the outside of the housing 801 through the threaded hole 801a, and an extension column 801b is provided on the outside of the housing 801, and a threaded hole matched with the threaded hole 801a is provided in the extension column 801b, so as to increase the matching effect between the screw 811 and the threaded hole, and improve the self-locking fastening degree of the screw 811. When the screw 811 rotates to move the first slide 802 to a predetermined position, the screw 811 and the threaded hole are used to fix the position of the first slide 802 inside the housing 801 to prevent the first slide 802 from accidentally moving or loosening during the test. The pressurized chamber includes a compression spring 805, which is extended and fixed along the length direction of the housing 801, one end of the compression spring 805 is fixed to one side of the second slide 803, and the other end of the compression spring 805 is fixed to the other side of the first slide 802. The compression spring 805 and the screw 811 are both on the central axis of the housing 801, and the guide rod 806 is substantially parallel to the compression spring 805 and the screw 811, respectively. In order to improve the stability of the compression spring 805, a first concave portion is provided on the other side of the first slide 802, and a second concave portion is provided on one side of the second slide 803. The two ends of the compression spring 805 are respectively fixed to the first concave portion and the second concave portion, which can ensure the stability of the connection between the compression spring 805 and the two slides. The clamping chamber includes a first clamping plate 807 and a second clamping plate 808. The first clamping plate 807 is detachably arranged on the other side of the second slide 803, and the second clamping plate 808 is detachably arranged on one side of the third slide 804. One side of the first clamping plate 807 has a plurality of arc grooves 807b, and one side of the second clamping plate 808 has a plane 808b. The space formed between the arc grooves 807b and the plane 808b defines a clamping space 812 for receiving the clamping rope 8a. Among them, the other side of the first clamping plate 807 has a first protrusion 807a, the other side of the second slide plate 803 has a first groove matching the first protrusion 807a, and the first protrusion 807a can be slidably connected to the first groove. Similarly, the other side of the second clamping plate 808 has a second protrusion 808a, and one side of the third slide plate 804 has a second groove matching the second protrusion 808a, and the second protrusion 808a can be slidably connected to the second groove. Among them, the cross-section of the first protrusion 807a and the second protrusion 808a is a T-shaped structure, and the cross-section of the corresponding first groove and the second groove is also T-shaped.In this way, the first clamping plate 807 and the second clamping plate 808 can be disassembled and replaced, and replaced with clamping plates with different arc grooves 807b sizes to adapt to ropes 8a of different sizes. In this embodiment, the number of ropes 8a is two, and the corresponding first grooves and second grooves are both two. Of course, the number of first grooves and second grooves can be adjusted according to the number of ropes 8a, such as one, three, four, etc. The compression spring 805 pushes the second slide plate 803 to move to adjust the spacing between the second slide plate 803 and the third slide plate 804, that is, to adjust the space between the first clamping plate 807 and the second clamping plate 808 to clamp the rope 8a. The pressure sensing chamber includes a pressure sensor 809, which is fixed on the inner side wall of the housing 801. The sensing end of the pressure sensor 809 abuts against the other side of the third slide plate 804, and can monitor the pressure changes of the rope clamp 8 in real time during operation.

[0061] The rope clamp 8 adjusts the acceleration of the car frame 4 in the following manner. The weight of the car frame 4 is M, and the test deceleration of the speed limiter 7 is a. The braking force F required to be generated on the rope clamp rope 8a can be calculated according to formula (1). The friction force between the rope clamp rope 8a and the first clamp plate 807 and the second clamp plate 808 is f, and the number of the rope clamp ropes 8a is n. The pressure value N of the pressure sensor 809 on the rope clamp 8 can be calculated according to formula (2). By manually operating the hand crank 810, the compression spring 805 is compressed or relaxed, and the clamping space 812 formed by the first clamp plate 807 and the second clamp plate 808 clamps the rope clamp rope 8a, and the pressure sensor 809 reads the force value data. When the force value of the pressure sensor 809 reaches the adjusted force value, the hand crank 810 is stopped, and the screw 811 and the threaded hole are used to lock the clamping position. At this time, the rope clamp 8 generates a certain clamping force on the rope clamp rope 8a. During the test, the car frame 4 falls downward. Due to the action of the rope clamp 8, the rope clamp rope 8a generates a braking force, and the car frame 4 runs downward at the acceleration required by the speed limiter 7 test.

[0062] F=M(g n -a) (1)

[0063]

[0064] In this embodiment, the weight of the car frame 4 is 300 kg, and the speed limiter 7 test deceleration is 5 m / s. 2, then according to formula (1), the braking force required to be generated on the rope clamping rope 8a can be calculated to be 1440N. The friction between the rope clamping rope 8a and the first clamping plate 807 and the second clamping plate 808 is 0.3, and the rope clamping rope 8a is two 8mm steel wire ropes. Then according to formula (2), the pressure value of the pressure sensor 809 on the rope clamp 8 can be calculated to be 2400N. By manually operating the hand crank 810, the compression spring 805 is compressed or relaxed, and the clamping space 812 formed by the first clamping plate 807 and the second clamping plate 808 clamps the rope clamping rope 8a, and the value of the pressure sensor 809 gradually increases. When the force value of the pressure sensor 809 reaches 2400N, the hand crank 810 is stopped, and the rope clamp 8 generates a certain clamping force on the rope clamping rope 8a. During the test, the car frame 4 falls downward. Due to the action of the rope clamp 8, the rope clamping rope 8a generates a braking force, and the car frame 4 runs downward at the acceleration required by the speed limiter 7 test.

[0065] like Figure 1 , 2 As shown in Figure 9, the control unit 9 is arranged on the top of the test frame 1, and the control unit 9 is electrically connected to the traction machine 2, the unhooking device 6 and the speed limiter 7 respectively. The control unit 9 mainly includes a data acquisition device, an industrial computer, a microcomputer controller and a frequency converter. Inside the control unit 9, the microcomputer controller is electrically connected to the frequency converter and the industrial computer respectively, and the industrial computer is electrically connected to the data acquisition device. Outside the control unit 9, the microcomputer controller is electrically connected to the unhooking device 6, the brake 203 and the limit switch 109a respectively, and the frequency converter is electrically connected to the driving host 202. The microcomputer controller controls the frequency converter to operate the driving host 202 of the traction machine 2, thereby driving the landing gear 3, the car frame 4 and the counterweight frame to move up and down in the lifting channel 101. The brake 203 is controlled by the microcomputer controller. When the driving host 202 is running, the brake 203 is opened, and when the driving host 202 stops, the brake 203 is closed. The limit switch 109a is electrically connected to the microcomputer control. When the limit switch 109a is disconnected, the microcomputer controller stops working, so that the circuits of the driving host 202 and the brake 203 are powered off, and the landing gear 3 is stopped.

[0066] Continue to refer to Fig. 9The data collector is used to collect the running speed of the car frame 4, the wheel speed of the speed limiter 7, the lifting force of the speed limiter rope 701, the electrical action signal of the speed limiter 7, and the mechanical action signal of the speed limiter 7. The acceleration sensor 401, the lifting force sensor 402, the speed sensor 703b, the magnetic induction switch 704b, the electrical switch 705, the pressure sensor 809 and the laser displacement sensor 102 are electrically connected to the data collector respectively. Among them, the acceleration sensor 401, the lifting force sensor 402, the speed sensor 703b, the magnetic induction switch 704b, the electrical switch 705, the pressure sensor 809 and the laser displacement sensor 102 are connected to the analog signal interface of the data collector.

[0067] like Figure 8 As shown, in another embodiment, a pair of safety clamps 10 are arranged at the lower parts of both sides of the car frame 4, and the pair of safety clamps 10 are respectively slidably connected to the first guide rail 109, and a lifting rod 10a is arranged on the top of the pair of safety clamps 10. The two lifting rods 10a are connected in series through a connecting rod 10b, and the connecting rod 10b is connected to one end of the lifting force sensor 402, and the other end of the lifting force sensor 402 is connected to one end of the speed limiting rope 701. When the speed limiter 7 responds and acts, a lifting force will be generated on the speed limiting rope 701, and this force will be transmitted along the connecting rod 10b, thereby lifting the lifting rod 10a, so that the safety clamp 10 performs a lifting action, and then clamps the safety clamp 10 on the first guide rail 109, so that the car frame 4 is stopped. According to the requirements of TSG T7001-2023 "Rules for Elevator Supervision Inspection and Periodic Inspection", during elevator supervision inspection, elevators using progressive safety clamps 10 should be loaded with 125% of the rated load and load in the car, and descend at the rated speed to conduct a speed limiter-safety clamp linkage test. During elevator periodic inspection, the car is empty and the speed limiter-safety clamp linkage test is carried out at the maintenance speed. The car frame 4 is dragged by traction drive to ensure that the car frame 4 can reach the rated speed of the speed limiter-safety clamp linkage mechanism. When the car frame 4 reaches the rated speed downward, the unhooking device 6 is unhooked by remote control, so that the car frame 4 starts a free fall test at the rated speed to simulate the worst working condition of the speed limiter-safety clamp linkage mechanism.

[0068] A method for using the above-mentioned test device for testing the performance of an elevator speed governor, the method comprising:

[0069] The speed limiter 7 to be tested is installed on the top of the test frame 1, the position of the first tensioner 103 is raised by the first jacking device 104, the speed limiter rope 701 is replaced, and the first jacking device 104 is reset to put the speed limiter 7 in a tensioned state.

[0070] The weight of the counterweight frame 5 and the car frame 4 is adjusted according to the test requirements.

[0071] The unhooker 6 is placed in a hooking state, the landing gear 3 and the car frame 4 are connected together, and the landing gear 3 and the car frame 4 are driven by the traction machine 2 to rise to a predetermined test height.

[0072] When the free fall test of the car frame 4 at the rated speed is performed, the car frame 4 is driven to the downward test speed by the traction machine 2, and then the unhooking device 6 is controlled to automatically unhook, so that the car frame 4 falls freely under the action of gravity, thereby triggering the action of the speed limiter 7. Specifically, the traction machine 2 drives the landing gear 3 and the car frame 4 to accelerate downward, and when the car frame 4 reaches the test speed, the unhooking device 6 automatically unhooks, so that the landing gear 3 and the car frame 4 are separated, and the car frame 4 starts to fall freely downward, triggering the action of the speed limiter 7, and finally falls on the car frame buffer 107.

[0073] When conducting a test of the car frame 4 falling at different accelerations in a stationary state, the car frame 4 is driven to the test height and is in a stationary state by the traction machine 2. According to the acceleration requirement, the clamping force of the rope clamp 8 on the rope clamp rope 8a is adjusted, and the unhooking device 6 is controlled to unhook, so that the car frame 4 falls at the set acceleration, thereby triggering the speed limiter 7 to operate, and finally falls on the car frame buffer 107.

[0074] The data collector collects and records the acceleration of the car frame 4, the wheel speed of the speed limiter 7, the lifting force of the speed limit rope 701, the electrical action signal of the speed limiter 7, and the mechanical action signal of the speed limiter 7. Specifically, the data collector can obtain the acceleration of the car frame 4 during free fall or downward movement by reading the signal of the acceleration sensor 401 set on the top of the car frame 4; by reading the signal of the lifting force sensor 402 set on the top of the car frame 4, the change value of the lifting force after the speed limiter 7 is actuated can be obtained; by reading the speed sensor 703b, the electrical switch 705, and the magnetic induction switch 704b signals on the outside of the speed limiter 7, the corresponding speed sensor 703b value when the electrical switch 705 is actuated is the electrical action speed of the speed limiter 7, the corresponding speed sensor 703b value when the magnetic induction switch 704b is actuated is the mechanical action speed of the speed limiter 7, and the corresponding speed sensor 703b value when the lifting force sensor 402 value suddenly increases is the speed when the speed limiter 7 generates the lifting force.

[0075] The car frame 4 falls to the bottom of the hoistway 101, completing the test.

[0076] In general, the test device of the present invention uses traction drive to drag the car frame to ensure that the car frame can reach the rated speed of the speed limiter. When the car frame reaches the rated speed downward, the unhooking device is unhooked by remote control to separate the landing gear and the car frame, and the car frame starts a free fall test at the rated speed to simulate the worst working condition of the speed limiter and improve the intrinsic safety level of the speed limiter. Compared with the winch drive, the traction machine is in a power generation state during the heavy load down and light load up process, which not only reduces the power required to pull the car frame of the same weight, but also saves electricity, further improving the environmental protection and energy saving level of the laboratory. The test device of the present invention is equipped with a lifting force sensor and an acceleration sensor on the top of the car frame, and communicates in real time with the microcomputer controller in the control unit through the accompanying cable. During the free fall of the car frame, it can also quickly follow the car frame to run synchronously to avoid the disconnection of the sensor signal during the test. A laser displacement sensor is arranged at the bottom of the lifting channel to collect the position information of the car frame, which is convenient for setting the falling height of the car frame and improving the test quality and efficiency. The rope clamp of the present invention is arranged on the top of the test frame and clamps the rope clamping rope, thereby generating a braking force, so that the falling acceleration of the car frame is controlled within the test range, and the speed limiter performance is tested under the condition that the car frame falls downward at different accelerations in a static state. In addition, a pressure sensor is provided, and the clamping force of the rope clamping rope can be adjusted according to the test acceleration to improve the test quality.

[0077] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A test device for testing the performance of an elevator speed governor, characterized in that: The test device comprises: a vertically arranged test frame, wherein a lifting passage for testing is formed inside the test frame; A main rope is hung on the traction machine on the top of the test frame; A landing gear, which is arranged at one side of the traction machine and connected to the main rope, the landing gear moves up and down in the hoistway, and a car frame is arranged below the landing gear and connected through a decoupling device, and the decoupling device is used to separate the landing gear from the car frame; A counterweight frame, which is arranged on the other side of the traction machine and connected to the main rope, and the counterweight frame moves in the hoistway along with the movement of the landing gear; A speed limiter, which is arranged on the top of the test frame and is hung with a speed limit rope, one end of the speed limit rope is connected to the top of the car frame, and the other end of the speed limit rope is hung on a first guide wheel arranged at the bottom of the lifting channel and connected to the bottom of the car frame, and the speed limiter is used to monitor the running speed of the car frame; A rope clamp, which is arranged on the top of the test frame and clamps a rope, one end of the rope clamp is connected to the top of the car frame, and the other end of the rope clamp is hung on a second guide wheel arranged at the bottom of the lifting channel and connected to the bottom of the car frame, and the rope clamp is used to control the speed of the car frame when it falls; A data collector is used to collect the running speed of the car frame, the wheel speed of the speed limiter, the pulling force of the speed limit rope, the electrical action signal of the speed limiter and the mechanical action signal of the speed limiter.

2. A test device for testing the performance of an elevator speed governor according to claim 1, characterized in that: An acceleration sensor and a lifting force sensor are arranged on the top of the car frame. The acceleration sensor is used to collect the acceleration of the car frame. The lifting force sensor is connected to one end of the speed limiting rope and is used to collect the lifting force of the speed limiting rope. The acceleration sensor and the lifting force sensor are electrically connected to the data collector respectively.

3. A test device for testing the performance of an elevator speed governor according to claim 1, characterized in that: It also includes a speed test component and a mechanical action test component, the speed test component includes a support frame arranged on the top of the test frame and a speed sensor arranged at one end of the support frame, the speed sensor is provided with a speed measuring wheel for testing the speed of the speed limiter wheel, the mechanical action test component includes a magnetic meter stand arranged on the top of the test frame and a magnetic induction switch arranged at one end of the magnetic meter stand for testing the mechanical action speed of the speed limiter, the speed sensor and the magnetic induction switch are electrically connected to the data collector respectively.

4. A test device for testing the performance of an elevator speed governor according to claim 1, characterized in that: An electrical switch for detecting the electrical operating speed of the speed limiter is arranged on the side of the speed limiter, and the electrical switch is electrically connected to the data collector.

5. A test device for testing the performance of an elevator speed governor according to claim 1, characterized in that: A laser displacement sensor is disposed at the bottom of the lifting passage and is located below the car frame, and is used to monitor the position of the car frame in the lifting passage.

6. A test device for testing the performance of an elevator speed governor according to claim 1, characterized in that: It also includes a control unit, which is arranged on the top of the test frame, and is electrically connected to the traction machine, the unhooking device and the speed limiter respectively, and the data collector is located inside the control unit.

7. A test device for testing the performance of an elevator speed governor according to claim 1, characterized in that: A first tensioner for adjusting the tension of the speed limiting rope is disposed at the lower part of the first guide wheel, and a first jacking device for adjusting the height of the first guide wheel is disposed at the lower part of the first tensioner; a second tensioner for adjusting the tension of the rope clamping rope is disposed at the lower part of the second guide wheel, and a second jacking device for adjusting the height of the second guide wheel is disposed at the lower part of the second tensioner.

8. A test device for testing the performance of an elevator speed governor according to claim 1, characterized in that: A car frame buffer and a counterweight frame buffer are provided at the bottom of the lifting channel. The car frame buffer is located below the car frame, and the counterweight frame buffer is located below the counterweight frame.

9. A test device for testing the performance of an elevator speed governor according to claim 1, characterized in that: The interior of the lifting channel also includes a first guide rail and a second guide rail, a first pulley is provided on both sides of the landing gear, a second pulley is provided on both sides of the car frame, the first pulley and the second pulley are respectively slidably connected to the first guide rail, a limit switch is provided on the upper part of the first guide rail and is located above the landing gear, and a third pulley is provided on both sides of the counterweight frame, and the third pulley is slidably connected to the second guide rail.

10. A method for testing the performance of an elevator speed governor using the test device according to any one of claims 1 to 9, characterized in that: The method comprises: Adjust the weight of the counterweight frame and the car frame according to test requirements; The unhooking device is placed in a hooking state, and the landing gear and the car frame are driven by the traction machine to rise to a predetermined test height; When the free fall test of the car frame at the rated speed is carried out, the car frame is driven to the downward test speed by the traction machine, and then the unhooking device is controlled to automatically unhook, so that the car frame falls freely under the action of gravity, thereby triggering the action of the speed limiter; When the car frame is tested to fall at different accelerations in a stationary state, the car frame is driven to a test height and is in a stationary state by the traction machine, and the clamping force of the rope clamp on the rope clamp is adjusted according to the acceleration requirement, and the unhooking device is controlled to unhook, so that the car frame falls at a set acceleration, thereby triggering the speed limiter to act; The data collector collects and records the acceleration of the car frame, the wheel speed of the speed limiter, the pulling force of the speed limit rope, the electrical action signal of the speed limiter and the mechanical action signal of the speed limiter; The car frame falls to the bottom of the lifting channel to complete the test.

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