A test device for testing the performance of an elevator speed governor and a method thereof

Abstract

The present application relates to a kind of test device and its method for testing elevator speed limiter performance, comprising: test frame, inside formation for test lift passage;Main rope, hang around on traction machine;Landing gear, it is set in the side of the traction machine and is connected to the main rope, car frame is set below the landing gear and is connected by unhooker;Counterweight frame, it is set in the other side of the traction machine and is connected to the main rope;Speed limiter, it is set in the top of the test frame;Rope clamp, it is set in the top of the test frame;Data collector, for collecting the running speed of the car frame, the wheel speed of the speed limiter, the lifting force of the speed limiter rope, electrical action signal and mechanical action signal.It can test the speed limiter performance when car frame free fall occurs at rated speed and car frame falls at different acceleration under static state.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of speed limiter testing, in particular to a test device for testing the performance of an elevator speed limiter and a method thereof. BACKGROUND

[0002] In the free-fall test of the speed limiter, a winch is usually used to control the up and down movement of the car frame, the car frame is lifted to the test height, and the free-fall test is started from the static state. Since the running speed of the winch is small, usually not more than 0.5 m / s, while the rated speed of the elevator speed limiter is usually above 1 m / s, therefore, the existing test device cannot simulate the worst condition of the free-fall of the car under 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 cannot flexibly adjust or control the falling speed and acceleration, and cannot simulate the simulation of the car accelerating to fall under different accelerations in the static state due to the failure of the braking force or the traction force. Therefore, how to develop a test device for testing the performance of the speed limiter under dangerous working conditions of the elevator, which can not only meet the needs of high-speed simulation, but also flexibly control the acceleration and deceleration process of the car, is an urgent problem to be solved. SUMMARY

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

[0004] The second object of the present application is to provide a method for testing the performance of an elevator speed limiter using the test device.

[0005] In order to achieve the above-mentioned objects, the present application adopts the following technical solutions:

[0006] A test device for testing the performance of an elevator speed limiter, the test device comprising: a test frame arranged vertically, the test frame forming an elevator shaft inside for testing; a main rope hung around a hoisting machine at the top of the test frame; a landing gear arranged at one side of the hoisting machine and connected to the main rope, the landing gear moving up and down in the elevator shaft, a car frame arranged below the landing gear and connected through an unhooker for separation of the landing gear and the car frame; a counterweight frame arranged at the other side of the hoisting machine and connected to the main rope, the counterweight frame moving in the elevator shaft with the movement of the landing gear; a speed limiter arranged at the top of the test frame and hung around a speed limiting rope, one end of the speed limiting rope connected to the top of the car frame, the other end of the speed limiting rope hung around a first guide wheel arranged at the bottom of the elevator shaft and connected to the bottom of the car frame, the speed limiter for monitoring the running speed of the car frame; a rope clamp arranged at the top of the test frame and clamping a rope clamp rope, one end of the rope clamp rope connected to the top of the car frame, the other end of the rope clamp rope hung around a second guide wheel arranged at the bottom of the elevator shaft and connected to the bottom of the car frame, the rope clamp for controlling the speed of the car frame when falling; a data collector for collecting the running speed of the car frame, the wheel speed of the speed limiter, the pulling force of the speed limiting rope, the electrical action signal of the speed limiter and the mechanical action signal of the speed limiter.

[0007] Further, an acceleration sensor is arranged at the top of the car frame, the acceleration sensor for collecting the acceleration of the car frame, and a pulling force sensor is connected to one end of the speed limiting rope, the pulling force sensor for collecting the pulling force of the speed limiting rope, the acceleration sensor and the pulling force sensor being electrically connected to the data collector respectively.

[0008] Further, a speed test assembly and a mechanical action test assembly are further included, the speed test assembly comprising a support frame arranged at the top of the test frame and a speed sensor arranged at one end of the support frame, a speed measuring wheel for testing the wheel speed of the speed limiter being arranged on the speed sensor, the mechanical action test assembly comprising a magnetic table seat arranged at the top of the test frame and a magnetic induction switch arranged at one end of the magnetic table seat for testing the mechanical action speed of the speed limiter, the speed sensor and the magnetic induction switch being electrically connected to the data collector respectively.

[0009] Further, an electrical switch for detecting the electrical action speed of the speed limiter is arranged at the side of the speed limiter, the electrical switch being electrically connected to the data collector.

[0010] Further, the bottom of the lifting channel is provided with a laser displacement sensor and is located below the car frame, which is used to monitor the position of the car frame in the lifting channel.

[0011] Further, a control unit is arranged on the top of the test frame, which is electrically connected with the traction machine, the unhooker and the speed limiter respectively, and the data collector is located in the control unit.

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

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

[0014] Further, the lifting channel further comprises a first guide rail and a second guide rail, the two sides of the landing gear are provided with first pulleys, the two sides of the car frame are provided with second pulleys, the first pulleys and the second pulleys are respectively connected with the first guide rail in sliding mode, the upper part of the first guide rail is provided with a limit switch and is located above the landing gear, the two sides of the counterweight frame are provided with third pulleys, and the third pulleys are connected with the second guide rail in sliding mode.

[0015] A method for testing the performance of an elevator overspeed governor using the test device described above, the method comprising: adjusting the weight of the counterweight frame and the car frame according to the test requirements; placing the decoupler in the hooking state and driving the landing gear and the car frame to a predetermined test height by the traction machine; when conducting the free-fall test of the car frame at the rated speed, driving the car frame to the down test speed by the traction machine, and then controlling the decoupler to automatically decouple, so that the car frame freely falls under the action of gravity, thereby triggering the overspeed governor action; when conducting the test of the car frame falling at different accelerations in a stationary state, driving the car frame to the test height and in a stationary state by the traction machine, adjusting the clamping force of the rope clamp on the rope according to the acceleration requirements, controlling the decoupler to decouple, so that the car frame falls at a set acceleration, thereby triggering the overspeed governor action; the data collector collects and records the acceleration of the car frame, the wheel speed of the overspeed governor, the pulling force of the overspeed rope, the electrical action signal of the overspeed governor, and the mechanical action signal of the overspeed governor; the car frame falls at the bottom of the hoistway, and the test is completed.

[0016] The present application has the following advantages:

[0017] 1. The test device of the present application uses traction drive to drag the car frame to run, ensuring that the car frame can reach the rated speed of the overspeed governor. When the car frame reaches the rated speed downward, the decoupler is remotely controlled to decouple, so that the landing gear and the car frame are separated, and the car frame starts the free-fall test at the rated speed to simulate the worst working condition of the overspeed governor and improve the intrinsic safety level of the overspeed governor. Compared with using a hoist to drive, the traction machine is in a power generation state during the process of heavy downward and light upward, which not only reduces the power required to pull the same weight of the car frame, but also saves electric energy, further improving the environmental protection and energy saving level of the laboratory.

[0018] 2. The test device of the present application is provided with a pulling force sensor and an acceleration sensor on the top of the car frame, and communicates in real time through the traveling cable and the microcomputer controller in the control unit, so that the sensor can quickly follow the car frame and run synchronously during the free-fall process of the car frame, avoiding the disconnection of the sensor signal during the test. A laser displacement sensor is arranged at the bottom of the hoistway to collect the position information of the car frame, which is convenient for setting the falling height of the car frame and improves the test quality and efficiency.

[0019] 3. The rope clamp of the present application is arranged on the top of the test frame and clamps the rope, thereby generating a braking force to control the falling acceleration of the car frame within the test range, and realizes the test of the performance of the overspeed governor under the condition that the car frame falls downward at different accelerations in a stationary state. Moreover, a pressure sensor is arranged, which can adjust the pressing force of the rope according to the test acceleration, thereby improving the test quality. Attached Figure Description

[0020] Figure 1 This is a front view of the test apparatus of the present invention for testing the performance of a speed governor under simulated dangerous operating conditions of an elevator.

[0021] Figure 2 This is a side view of the test apparatus of the present invention for testing the performance of a speed governor under simulated dangerous operating conditions of an elevator.

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

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

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

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

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

[0027] Figure 8 This is a front view of the testing apparatus with safety clamps according to the present invention.

[0028] Figure 9 This is a control flowchart of the experimental apparatus of the present invention.

[0029] Wherein, 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 main machine, 203 is a brake, 204 is a first 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 tension sensor, 403 is a second pulley, 404 is a traveling cable, 5 is a counterweight frame, 501 is a third pulley, 6 is an unhooker, 7 is a speed limiter, 701 is a speed limiting rope, 702 is a first guide wheel, 703 is a speed test assembly, 703a is a support frame, 703a1 is a first support rod, 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 shell, 801a is a threaded hole, 801b is an extension column, 802 is a first sliding plate, 803 is a second sliding plate, 804 is a third sliding plate, 805 is a compression spring, 806 is a guide rod, 807 is a first clamping plate, 807a is a first protrusion, 807b is an arc-shaped groove, 808 is a second clamping plate, 808a is a second protrusion, 808b is a flat surface, 809 is a pressure sensor, 810 is a hand crank, 811 is a screw rod, 812 is a clamping space, 8a is a rope clamping rope, 8b is a second guide wheel, 8c is a third guide wheel, 8d is a second support, 8e is a third support, 9 is a control unit, 10 is a safety clamp, 10a is a tension rod, 10b is a connecting rod. DETAILED DESCRIPTION

[0030] The following description is merely illustrative in nature and is in no way intended to limit the invention, its application, or use. It will be further understood that the terms “comprising” and / or “including” as used herein specify the presence of the mentioned features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or groups thereof. As used herein, 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 portion is referred to as “connected to another element, component, and / or portion,” it may be directly connected to another element, component, and / or portion, or there may be intermediate elements. It will be understood that although the terms “first,” “second,” etc., may be used herein to describe various elements, components, and / or portions, these elements, components, and / or portions should not be limited by these terms. These terms are used only to distinguish one element, component, or portion from another element, component, or portion. Therefore, the first element, component, or part discussed below may be referred to as the second element, component, or part without departing from the teachings of the invention. Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. 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 expressly defined herein.

[0031] It should be understood that, for clarity, the accompanying drawings are not drawn to scale, and the same or similar reference numerals indicate the same or similar parts or components. Furthermore, it should be understood that any embodiments described in this application and the technical features they include can be combined with each other.

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

[0033] like Figure 1 and Figure 2 As shown, a test device for testing the performance of an elevator speed governor mainly includes a test frame 1, a traction machine 2, a landing gear 3, a counterweight frame 5, a speed governor 7, a rope clamp and a control unit 9. The test frame 1 is arranged vertically and has a test platform on its top for supporting various test equipment. The test frame 1 has a lifting channel 101 for testing inside it. 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 toFigure 1 and Figure 2 The traction machine 2 is arranged on the top of the test stand 1, i.e. carried on the test stand, and the main rope 201 is hung around the traction machine 2 on the top of the test stand 1. The traction machine 2 comprises a first support 204, and a driving main machine 202 and a traction wheel 205 arranged in series on the first support 204. The driving main machine 202 is selected as a permanent magnet synchronous main machine, which saves installation space. The traction wheel 205 is circumferentially provided with a plurality of wheel grooves 205a, and the main rope 201 is hung around the wheel grooves 205a. The shape of the wheel grooves 205a can be V-shaped, U-shaped, semicircular or other shapes capable of clamping the main rope 201. In this embodiment, the shape of the wheel grooves 205a is V-shaped, and the angle of the V-shaped wheel grooves 205a is 20-60°. The number of the wheel grooves 205a of the traction wheel 205 is five, corresponding to five main ropes 201. The number of the wheel grooves 205a can be configured according to the number of the main ropes 201, such as one, two, four, etc. The outside of the traction wheel 205 is correspondingly provided with a brake 203 for braking the traction wheel 205. The brake 203 is electrically connected with the control unit 9. The number of the brake 203 is two, and the two brakes 203 are symmetrically arranged and correspond to the outside of the traction wheel 205 respectively. The two brakes 203 are independently operated to prevent one brake 203 from failing and causing a falling accident.

[0035] Continuing 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 by the unhooker 6. The car frame 4 is internally provided with a plurality of counterweight blocks. The number of the counterweight blocks is adjusted according to the test requirement. The unhooker 6 is used for the separation of the landing gear 3 and the car frame 4. The unhooker 6 remotely controls the hooking and unhooking through the control unit 9 to make the car frame 4 free fall. The unhooker 6 can be a flip claw type automatic unhooker, a remote control hook automatic unhooker or a wireless electric automatic unhooker, etc. The car frame 4 is provided with an acceleration sensor 401 on the top. The acceleration sensor 401 is used for collecting the acceleration of the car frame 4. One end of the acceleration sensor 401 is also connected with a traveling cable 404. The acceleration sensor 401 is electrically connected with 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. The counterweight frame 5 is internally provided with a plurality of counterweight blocks. The number of the counterweight blocks is adjusted according to the weight requirement of the car frame 4 to ensure that the car frame 4 does not appear insufficient traction during the installation of the counterweight.

[0037] As Figure 2As shown, the inside of the lifting channel 101 further comprises a first guide rail 109 and a second guide rail 110, both of which are arranged along the height direction of the lifting channel 101 and are parallel to each other, the landing gear 3 is provided with a first pulley 301 on both sides, and the car frame 4 is provided with a second pulley 403 on both sides, the first pulley 301 and the second pulley 403 are respectively connected with the first guide rail 109, the number of the first pulley 301 and the second pulley 403 is four, and the four first pulleys 301 and the four second pulleys 403 are respectively arranged on the upper and lower sides of the landing gear 3 and the car frame 4, so that 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 above the landing gear 3, and a plunger is installed on the landing gear 3, when the height of the landing gear 3 exceeds the limit position, the plunger triggers the limit switch 109a to act, so that the landing gear 3 is stopped. The counterweight frame 5 is provided with a third pulley 501 on both sides, and the third pulley 501 is connected with the second guide rail 110, so that the counterweight frame 5 can slide up and down along the lifting channel 101.

[0038] As shown in Figure 2 , the bottom of the lifting channel 101 is provided with a car frame buffer 107 and a counterweight frame buffer 108, 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, and 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] As shown in Figure 2 , the bottom of the lifting channel 101 is provided with a laser displacement sensor 102 and is located below the car frame 4, which is used to monitor the position of the car frame 4 in the lifting channel 101.

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

[0041]

[0042] When the car frame 4 is in full load state and the car frame 4 and the landing gear 3 are in connected state, the traction condition of the test device should meet:

[0043]

[0044] When the car frame 4 and the landing gear 3 are in separated state, the traction condition of the test device should meet:

[0045]

[0046] As Figure 7 shown in the present 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-shaped groove, and the angle α of the wheel groove 205a is 30°. Then the equivalent friction coefficient of the wheel 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°, and in order 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 the full load state and the car frame 4 and the landing gear 3 are in the connected state, the traction condition of the test device meets the requirements:

[0051]

[0052] When the car frame 4 and the landing gear 3 are in the 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 the full load state and the car frame 4 and the landing gear 3 are in the separated state, sufficient traction force can be generated between the main rope 201 and the traction sheave 205, so as to ensure that the landing gear 3 and the counterweight frame do not fall or hit the top.

[0056] Next, refer to Figure 1 and Figure 3, the speed limiter 7 is arranged on the top of the test frame 1 and hung around the speed limiting rope 701, one end of the speed limiting rope 701 is connected to the top of the car frame 4, the top of the car frame 4 is correspondingly provided with a pulling force sensor 402, the pulling force sensor 402 is connected to one end of the speed limiting rope 701, which is used to collect the pulling force of the speed limiting rope 701, the pulling force sensor 402 is also connected with a traveling cable 404, the pulling force sensor 402 is electrically connected with the data collector through the traveling cable 404, the pulling force sensor 402 adopts an S-shaped force sensor, and the maximum range reaches 10000N. The other end of the speed limiting rope 701 is hung around the first guide wheel 702 arranged at the bottom of the lifting channel 101 and connected to the bottom of the car frame 4, and the speed limiter 7 is used to monitor the running speed of the car frame 4. The lower part of the first guide wheel 702 is provided with a first tensioner 103 for adjusting the tension of the speed limiting rope 701, and the lower part of the first tensioner 103 is provided with a first jacking device 104 for adjusting the height of the first guide wheel 702. When it is necessary to replace the speed limiter 7 and the speed limiting rope 701, first, the first jacking device 104 is used to jack up the first tensioner 103, and then the height position of the first guide wheel 702 is adjusted, so that the speed limiting rope 701 of the speed limiter 7 is in a relaxed state, then the speed limiting rope 701 is replaced with a new speed limiting rope 701, and finally the first jacking device 104 is reset, and the speed limiting 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, which is operated by hand to lift the tensioner. Of course, it can also be a single-seat jacking device, a double-seat jacking device or a suspended jacking device, etc.

[0057] The speed limiter 7 is installed on the first support 204, the top of the test stand 1 is provided with a speed test assembly 703, a mechanical action test assembly 704 and an electrical switch 705, the speed test assembly 703 comprises a support frame 703a arranged at the top of the test stand 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 selects 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. The support frame 703a comprises a first support rod 703a1 and a second support rod 703a2, the first support rod 703a1 is rotatably connected to the second support rod 703a2, the end of the second support rod 703a2 is connected to the speed sensor 703b, the position of the speed sensor 703b and the speed measuring wheel 703c on the speed limiter 7 is adjusted by rotating the second support rod 703a2, specifically, the first support rod 703a1 is vertically arranged at the top of the test stand 1, a plurality of connecting holes are arranged on the first support rod 703a1 and the second support rod 703a2, and the second support rod 703a2 is fixed on 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, and further adjust the position of the speed sensor 703b and the speed measuring wheel 703c on the speed limiter 7. The mechanical action test assembly 704 comprises a magnetic table seat 704a arranged at the top of the test stand 1 and a magnetic induction switch 704b arranged at one end of the magnetic table seat 704a for testing the mechanical action speed of the speed limiter 7, the magnetic induction switch 704b is close to the mechanical action component of the speed limiter 7. The electrical switch 705 is located at the side of the speed limiter 7, which is used for detecting the electrical action speed of the speed limiter 7.

[0058] As Figures 4-6As shown, the rope clamp 8 is arranged on the top of the test frame 1 and clamps the rope clamp rope 8a, one end of the rope clamp rope 8a is connected to the top of the car frame 4, the other end of the rope clamp rope 8a is hung on the second guide wheel 8b arranged at the bottom of the lifting passage 101 and is connected to the bottom of the car frame 4, and the rope clamp 8 is used to control the speed of the car frame 4 when falling. The lower part of the second guide wheel 8b is provided with a second tensioner 105 for adjusting the tension of the rope clamp rope 8a, and the lower part of the second tensioner 105 is provided with a second jack 106 for adjusting the height of the second guide wheel 8b. When it is necessary to replace the rope clamp rope 8a, first use the second jack 106 to lift the second tensioner 105, and then adjust the height position of the second guide wheel 8b to make the rope clamp rope 8a in a relaxed state, then replace the rope clamp rope 8a with a new one, and finally reset the second jack 106 and the speed limiting rope 701 is tensioned again. The tensioner can be an elastic tensioner, a chain tensioner or a steel belt tensioner, etc., and the jack is a manual hydraulic jack, which is operated by hand to lift the tensioner. Of course, the jack can also be a single-seat jack, a double-seat jack or a suspended jack, etc. Among them, the top of the test frame 1 is provided with a third support 8e, and the third support 8e is provided with a third guide wheel 8c which is located above the rope clamp 8. The rope clamp rope 8a is hung on the third guide wheel 8c, so that one end of the rope clamp rope 8a is hung on the third guide wheel 8c and then connected to the top of the car frame 4.

[0059] Continuing to refer to Figures 4-6 , the rope clamp 8 includes a top-opened housing 801 which is supported on the top of the test frame 1 by a second support 8d, wherein the top of the housing 801 is open to form an opening, and the bottom of the housing 801 has a through slot for receiving the rope clamp rope 8a. Inside the housing 801, a first slide plate 802, a second slide plate 803 and a third slide plate 804 are slidably arranged along the length direction of the housing 801, which are vertically arranged inside the housing 801 and parallel to each other to divide the space inside the housing 801 into a power chamber, a pressurizing chamber, a clamping chamber and a pressure sensing chamber, and the rope clamp rope 8a is located in the clamping chamber. At least one guide rod 806 is arranged inside the housing 801 and extends 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. 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. The number of guide rods 806 is two, and the two guide rods 806 are respectively located near the two opposite inner side walls of the housing 801.

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

[0061] The rope clamp 8 adjusts the acceleration of the car frame 4 according to the following manner. The weight of the car frame 4 is M, and the test deceleration of the speed limiter 7 is a. Then, according to formula (1), the braking force F required to be generated on the rope clamping ropes 8a can be calculated. The friction between the rope clamping ropes 8a and the first clamping plate 807 and the second clamping plate 808 is f, and the number of rope clamping ropes 8a is n. Then, according to formula (2), the pressure value N of the pressure sensor 809 on the rope clamp 8 can be calculated. 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 ropes 8a, and the pressure sensor 809 reads the force value data. When the force value of the pressure sensor 809 reaches the adjustment force value, the operation of the hand crank 810 is stopped, and the cooperation of the screw rod 811 and the threaded hole is used to lock the clamping position. At this time, the rope clamp 8 generates a certain clamping force on the rope clamping ropes 8a. During the test, the car frame 4 falls downward, and due to the action of the rope clamp 8, the rope clamping ropes 8a generate a braking force, and the car frame 4 runs downward at the acceleration required by the test of the speed limiter 7.

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

[0063]

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

[0065] As shown in Figure 1 , 2 and 9, the control unit 9 is arranged at the top of the test frame 1, and the control unit 9 is electrically connected with the traction machine 2, the unhooker 6 and the speed limiter 7 respectively. The control unit 9 mainly includes a data collector, an industrial computer, a microcomputer controller and a frequency converter. Inside the control unit 9, the microcomputer controller is electrically connected with the frequency converter and the industrial computer respectively, and the industrial computer is electrically connected with the data collector. Outside the control unit 9, the microcomputer controller is electrically connected with the unhooker 6, the brake 203 and the limit switch 109a respectively, and the frequency converter is electrically connected with the drive host 202. The microcomputer controller controls the frequency converter to make the drive host 202 of the traction machine 2 run, thereby driving the landing gear 3, the car frame 4 and the counterweight frame to run up and down in the lifting channel 101. The microcomputer controller controls the brake 203 to open when the drive host 202 runs, and the brake 203 closes when the drive host 202 stops. The limit switch 109a is electrically connected with the microcomputer controller, and when the limit switch 109a is disconnected, the microcomputer controller stops working, so that the drive host 202 and the brake 203 circuit are powered off, and the landing gear 3 is stopped.

[0066] Continuing to refer to Figure 9The data acquisition unit 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. Accelerometer 401, lifting force sensor 402, speed sensor 703b, magnetic induction switch 704b, electrical switch 705, pressure sensor 809, and laser displacement sensor 102 are electrically connected to the data acquisition unit. The accelerometer 401, lifting force sensor 402, speed sensor 703b, magnetic induction switch 704b, electrical switch 705, pressure sensor 809, and laser displacement sensor 102 are connected to the analog signal interface of the data acquisition unit.

[0067] like Figure 8 As shown, in another embodiment, a pair of safety clamps 10 are provided on the lower part of both sides of the car frame 4. The pair of safety clamps 10 are slidably connected to the first guide rail 109 respectively. Each pair of safety clamps 10 is provided with a lifting rod 10a at the top. The two lifting rods 10a are connected in series by a connecting rod 10b. The connecting rod 10b is connected to one end of the lifting force sensor 402. 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 is generated on the speed limiting rope 701. This force is transmitted along the connecting rod 10b, thereby lifting the lifting rod 10a, causing the safety clamps 10 to perform a lifting action, and then clamping the safety clamps 10 onto the first guide rail 109, thus stopping the car frame 4. According to TSG T7001-2023 "Rules for Supervision and Periodic Inspection of Elevators", during supervision and inspection, elevators using progressive safety gear 10 should be loaded with 125% of their rated load and descend at the rated speed to conduct a governor-safety gear linkage test. During periodic inspection, the car should be unloaded and descend at the maintenance speed to conduct the governor-safety gear linkage test. The car frame 4 is driven by a traction drive to ensure it reaches the rated speed of the governor-safety gear linkage mechanism. When the car frame 4 reaches the rated speed, the unhooking device 6 is remotely controlled to disengage, allowing the car frame 4 to begin a free fall test at the rated speed to simulate the worst-case operating conditions of the governor-safety gear linkage mechanism.

[0068] A method for testing the performance of an elevator speed governor using the aforementioned test apparatus, the method comprising:

[0069] Install the speed limiter 7 to be tested onto the top of the test frame 1, raise the position of the first tensioner 103 by the first lifter 104, replace the speed limiter rope 701, and reset the first lifter 104 to put the speed limiter 7 into a tensioned state.

[0070] Adjust the weights of the counterweight frame 5 and the car frame 4 according to the test requirements.

[0071] The unhooker 6 is placed in the 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 to rise to a predetermined test height by the traction machine 2.

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

[0073] When the test of the car frame 4 falling at different accelerations in the static state is performed, the car frame 4 is driven to a test height and is in a static state by the traction machine 2, the clamping force of the rope clamp 8 on the clamping rope 8a is adjusted according to the acceleration requirement, the unhooker 6 is controlled to unhook, so that the car frame 4 falls at a set acceleration, thereby triggering the action of the speed limiter 7, and finally falling 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 pulling force of the speed limiting 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 in the process of free-falling or running downward by reading the signal of the acceleration sensor 401 arranged at the top of the car frame 4; the change value of the pulling force after the action of the speed limiter 7 can be obtained by reading the signal of the pulling force sensor 402 arranged at the top of the car frame 4; the electrical action speed of the speed limiter 7 is the value of the speed sensor 703b corresponding to the action of the electrical switch 705, the mechanical action speed of the speed limiter 7 is the value of the speed sensor 703b corresponding to the action of the magnetic induction switch 704b, and the speed of the speed limiter 7 when the pulling force is generated is the value of the speed sensor 703b corresponding to the sudden increase of the value of the pulling force sensor 402.

[0075] The car frame 4 falls at the bottom of the lifting channel 101, and the test is completed.

[0076] Overall, the test device of the application adopts a traction drive mode to drag the car frame to run, ensuring that the car frame can reach the rated speed of the speed limiter. When the car frame reaches the rated speed downward, the remote control unhooker is unhooked to separate the landing gear and the car frame, and the car frame starts 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 use of hoist drive, the use of traction machine drive is in the state of power generation during the process of heavy load downward and light load upward, which not only reduces the power required to lift the same weight of car frame, but also saves electric energy, and further improves the environmental protection and energy saving level of the laboratory. The test device of the application sets a lifting force sensor and an acceleration sensor on the top of the car frame, and communicates in real time through the traveling cable and the microcomputer controller in the control unit, so that the sensor signal can also be quickly followed and synchronized with the car frame during the free fall process of the car frame, avoiding the disconnection of the sensor signal during the test process. A laser displacement sensor is arranged at the bottom of the lifting channel to collect the position information of the car frame, so as to set the falling height of the car frame, improve the test quality and efficiency. The rope clamping device of the application is arranged on the top of the test frame and clamps the rope rope, so as to generate a braking force, control the falling acceleration of the car frame within the test range, and realize the test of the performance of the speed limiter under the condition of different acceleration downward falling of the car frame in the static state. Moreover, a pressure sensor is arranged, which can adjust the compression force of the rope rope according to the test acceleration, and improve the test quality.

[0077] The above embodiment is the preferred embodiment of the application, but the embodiment of the application is not limited by the above embodiment, and any change, modification, replacement, combination, simplification made without departing from the spirit and principle of the application shall be equivalent replacement mode, which is included in the protection scope of the application.

Claims

1. A test apparatus for testing the performance of an elevator speed governor, characterized in that, The testing apparatus includes: a vertically arranged test frame, the interior of which forms a lifting channel for testing; The main rope is suspended from the traction machine at the top of the test frame; The landing gear is disposed on one side of the traction machine and connected to the main rope. The landing gear moves up and down within the lifting channel. A car frame is disposed below the landing gear and connected to it by a release device. The release device is used to separate the landing gear and the car frame. A counterweight frame is disposed on the other side of the traction machine and connected to the main rope. The counterweight frame moves within the lifting channel as the landing gear moves. A speed limiter is installed on the top of the test frame and a speed limit rope is hung around it. 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 around the first guide wheel located at the bottom of the lifting channel and connected to the bottom of the car frame. The speed limiter is used to monitor the running speed of the car frame. A rope clamp is provided on the top of the test frame and clamps a rope clamping device. One end of the rope clamping device is connected to the top of the car frame, and the other end of the rope clamping device is wrapped around a second guide wheel located at the bottom of the lifting channel and connected to the bottom of the car frame. The rope clamp is used to control the speed of the car frame when it falls. The data acquisition unit is used to collect the running speed of the car frame, the wheel speed of the speed limiter, the lifting force of the speed limiter rope, the electrical action signal of the speed limiter, and the mechanical action signal of the speed limiter.

2. The test apparatus 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 installed on the top of the car frame. The acceleration sensor is used to collect the acceleration of the car frame, and 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 acquisition unit.

3. The test apparatus for testing the performance of an elevator speed governor according to claim 1, characterized in that, It also includes a speed testing component and a mechanical motion testing component. The speed testing component includes a support frame disposed on the top of the test frame and a speed sensor disposed at one end of the support frame. The speed sensor is provided with a speed measuring wheel for testing the speed limiter wheel speed. The mechanical motion testing component includes a magnetic base disposed on the top of the test frame and a magnetic induction switch disposed at one end of the magnetic base for testing the mechanical motion speed of the speed limiter. The speed sensor and the magnetic induction switch are respectively electrically connected to the data acquisition unit.

4. The test apparatus for testing the performance of an elevator speed governor according to claim 1, characterized in that, The speed limiter is provided with an electrical switch on its side for detecting the electrical operating speed of the speed limiter, and the electrical switch is electrically connected to the data acquisition unit.

5. The test apparatus for testing the performance of an elevator speed governor according to claim 1, characterized in that, A laser displacement sensor is installed at the bottom of the lifting channel and located below the car frame, which is used to monitor the position of the car frame within the lifting channel.

6. The test apparatus for testing the performance of an elevator speed governor according to claim 1, characterized in that, It also includes a control unit, which is located on the top of the test frame and is electrically connected to the traction machine, the unhooker and the speed limiter. The data acquisition unit is located inside the control unit.

7. The test apparatus for testing the performance of an elevator speed governor according to claim 1, characterized in that, The lower part of the first guide wheel is provided with a first tensioner for adjusting the tension of the speed limiting rope, and the lower part of the first tensioner is provided with a first lifting device for adjusting the height of the first guide wheel; the lower part of the second guide wheel is provided with a second tensioner for adjusting the tension of the clamping rope, and the lower part of the second tensioner is provided with a second lifting device for adjusting the height of the second guide wheel.

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

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

10. A method for testing the performance of an elevator speed governor using the test apparatus as described in any one of claims 1-9, characterized in that, The method includes: Adjust the weight of the counterweight frame and the car frame according to the test requirements; The unhooking device is placed in the hooked state, and the landing gear and the car frame are driven to rise to the predetermined test height by the traction machine; When the car frame is subjected to a free fall test at the rated speed, the traction machine drives the car frame to the downward test speed, and then controls the unhooking device to automatically unhook, so that the car frame falls freely under the action of gravity, thereby triggering the speed limiter to act. When conducting tests on the car frame falling at different accelerations while stationary, the traction machine drives the car frame to the test height and keeps it stationary. According to the acceleration requirements, the clamping force of the rope clamp on the rope is adjusted, and the unhooking device is controlled to unhook, so that the car frame falls at the set acceleration, thereby triggering the speed limiter. The data acquisition device collects and records the acceleration of the car frame, the wheel speed of the speed limiter, the lifting 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 fell to the bottom of the lifting channel, completing the test.

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