A friction test device

Abstract

The utility model discloses a kind of friction test devices, comprising: sink, chute and sand-water mixture are arranged in sink, chute is immersed in sand-water mixture, turntable, turntable unidirectional rotation is arranged at the center of sink, multiple cantilevers are circumferentially hinged on turntable, multiple reversing rods, the middle part of reversing rod is connected with the end of cantilever away from turntable, reversing rod and cantilever constitute T type structure, wear-resistant boot is detachably connected with the lower end of reversing rod, wear-resistant boot is slidingly connected with chute, counterweight is arranged on the upper end of reversing rod, the friction test device is immersed chute by sink storage sand-water mixture, simulates the actual working environment of scraper, wear-resistant boot is driven on chute by cantilever and reversing rod and is rotated by friction, and then experimental wear effect, and turntable can be set different rotating speed to improve wear speed, counterweight applies gravitational force pressure to wear-resistant boot, ensure that wear-resistant boot is contacted with chute and keep certain fastening force.

Description

Technical Field

[0001] This utility model belongs to the field of friction testing technology for wear-resistant boots, and more specifically, relates to a friction testing device. Background Technology

[0002] The GL-type non-metallic chain sludge scraper is suitable for rectangular sedimentation tanks in waterworks, sewage treatment plants, etc., and is used to scrape off organic sludge, activated sludge, inorganic sand, chemical sludge, and scum from the tank surface.

[0003] The sludge scraper uses a double-row chain traction system, with scrapers installed at equal intervals on the chain. The sludge scraper operates continuously, with the scrapers moving slowly to scrape the sludge from the bottom of the pool into the sludge trough at the end of the pool, while simultaneously scraping the scum and oil from the surface of the pool into the scum trough or skimming pipe.

[0004] Each scraper is symmetrically fitted with a pair of upper and lower wear-resistant shoes on both sides, which contact the upper and lower slide rails respectively. The weight of the straight section of the chain and the scraper itself is borne by the upper and lower slide rails. During chain movement, sliding friction occurs between the wear-resistant shoes and the slide rails. Wastewater contains a large amount of mud, sand, scum, and other substances. Furthermore, due to the continuous operation of the scraper, the slide rails and wear-resistant shoes wear out quickly, and their service life directly determines the maintenance cycle of the scraper.

[0005] In recent years, technological breakthroughs in the field of polymer materials have significantly enriched the material options for slides and abrasion-resistant boots, improving the wear resistance and adaptability of the products.

[0006] Depending on the working conditions, the chain running speed ranges from 0.3 to 1.2 m / min. Under normal circumstances, the maintenance cycle for wear-resistant boots is 2 to 3 years, and the replacement cycle for the tracks is more than 5 years. If the working conditions are harsh and the mud and sand content is high, the wear-resistant boots and tracks will wear out severely, and the replacement cycle will be shortened.

[0007] Therefore, friction tests are needed for abrasion-resistant boots made of different materials to determine the service life of various abrasion-resistant boots under different working environments. Utility Model Content

[0008] The purpose of this invention is to address the shortcomings of existing technologies by providing a friction testing device, thereby solving the problem that existing wear-resistant boots made of different materials need to undergo friction testing to determine their service life under different working environments.

[0009] To achieve the above objectives, this utility model provides a friction testing device, comprising:

[0010] A water tank, wherein a slide and a sand-water mixture are provided in the water tank, and the slide is submerged in the sand-water mixture;

[0011] A turntable, which rotates unidirectionally, is located at the center of the water tank, and multiple cantilever arms are circumferentially hinged on the turntable;

[0012] Multiple directional levers are provided, the middle part of which is connected to the end of the cantilever away from the turntable. The directional lever and the cantilever form a T-shaped structure. The lower end of the directional lever is detachably connected to a wear-resistant shoe, which is slidably connected to the slide rail. The upper end of the directional lever is provided with a counterweight.

[0013] A drive mechanism is provided to drive the turntable to rotate.

[0014] Optionally, the water tank is also equipped with a protective cover.

[0015] Optionally, the slide is annular and includes three arc plates, each with a bevel at both ends, and the three arc plates are connected through the bevels.

[0016] Optionally, the counterweight includes:

[0017] A threaded rod, on which a counterweight is detachably connected;

[0018] A nut, threaded onto the threaded rod, is used to fasten the counterweight.

[0019] Optionally, the drive mechanism includes:

[0020] A motor bracket is provided, the lower end of which is connected to the bottom of the water tank. The upper end of the motor bracket is provided with a protective plate and a reduction motor. The protective plate prevents the sand-water mixture from contacting the reduction motor. The turntable is located at the drive end of the reduction motor. The cantilever is hinged to the turntable.

[0021] Optionally, it also includes frequency converters and SCADA systems.

[0022] Optionally, three reversing rods are provided, and multiple slide mounting plates are distributed around the bottom circumference of the water tank. The arc plate is detachably connected to the slide mounting plates.

[0023] Optionally, an adjustment pad is provided between the slide mounting plate and the water tank.

[0024] Optionally, the bottom of the water tank is provided with an I-beam steel channel.

[0025] This utility model provides a friction testing device, the advantages of which are:

[0026] This friction testing device uses a water tank to immerse the slide rail in a sand-water mixture, simulating the actual working environment of a scraper. A turntable, via a cantilever and reversing rod, drives the wear-resistant boots to rotate and rub against the slide rail, thus testing the wear effect. The turntable can be set to different speeds to increase the wear rate. A counterweight applies gravitational pressure to the wear-resistant boots, ensuring contact and a certain degree of tightness between the boots and the slide rail, thereby adapting to friction tests with different pressures on the upper and lower wear-resistant boots. The cantilever is hinged radially along the turntable for easy replacement of the wear-resistant boots.

[0027] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0028] The above and other objects, features and advantages of the present invention will become more apparent from the accompanying drawings, in which like reference numerals generally represent like parts.

[0029] Figure 1 A schematic diagram of a friction testing apparatus according to an embodiment of the present invention is shown.

[0030] Figure 2 A top view of a friction testing apparatus according to an embodiment of the present invention is shown.

[0031] Figure 3 A friction testing apparatus according to an embodiment of the present invention is shown. Figure 1 A magnified view of AA.

[0032] Figure 4 A schematic diagram of the structure of the water tank of a friction testing apparatus according to an embodiment of the present invention is shown.

[0033] Figure 5 A top view of the water tank of a friction testing apparatus according to an embodiment of the present invention is shown.

[0034] Figure 6 A schematic diagram of the slide rail of a friction testing device according to an embodiment of the present invention is shown.

[0035] Figure 7 A friction testing apparatus according to an embodiment of the present invention is shown. Figure 6 A cross-sectional view of HH.

[0036] Figure 8 A schematic diagram of the cantilever structure of a friction testing apparatus according to an embodiment of the present invention is shown.

[0037] Figure 9A schematic diagram of the structure of the turntable of a friction testing apparatus according to an embodiment of the present invention is shown.

[0038] Explanation of reference numerals in the attached figures:

[0039] 1. Water tank; 2. Slide rail; 3. Turntable; 4. Cantilever; 5. Reversing rod; 6. Wear-resistant shoe; 7. Counterweight; 8. Protective cover; 9. Motor bracket; 10. Gear motor; 11. Guard plate; 12. Slide rail mounting plate; 13. I-beam steel; 14. Drain pipe. Detailed Implementation

[0040] Preferred embodiments of the present invention will now be described in more detail. While preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0041] like Figure 1-9 As shown, a friction testing apparatus includes:

[0042] Water tank 1, with slide 2 and sand-water mixture inside the water tank 1, slide 2 being submerged in the sand-water mixture, and drain pipe 14 and ball valve installed on the water tank 1;

[0043] Turntable 3, which rotates in one direction, is located at the center of water tank 1, and multiple cantilever arms 4 are circumferentially hinged on turntable 3;

[0044] Multiple directional levers 5, the middle part of the directional lever 5 is connected to the end of the cantilever 4 away from the turntable 3, the directional lever 5 and the cantilever 4 form a T-shaped structure, the lower end of the directional lever 5 is detachably connected to a wear-resistant shoe 6, the wear-resistant shoe 6 is slidably connected to the slide rail 2, and the upper end of the directional lever 5 is provided with a counterweight 7.

[0045] The drive mechanism is used to drive the turntable 3 to rotate.

[0046] Specifically, a sand-water mixture is stored in a water tank 1, submerging the slide 2 to simulate the actual working environment of the scraper. A turntable 3, via a cantilever 4 and a reversing rod 5, drives the wear-resistant shoe 6 to rotate and rub against the slide 2, thus testing the wear effect. The turntable 3 can be set with different rotation speeds to increase the wear rate. A counterweight 7 applies gravitational pressure to the wear-resistant shoe 6, ensuring contact and a certain degree of tightness between the shoe and the slide 2, thereby adapting to friction tests with different pressures on the upper and lower wear-resistant shoes. The cantilever 4 is radially hinged along the turntable 3 for easy replacement of the wear-resistant shoe 6. The sand-water mixture is easily drained through a drain pipe 14 and a ball valve.

[0047] Furthermore, the water tank 1 is circular and made of stainless steel, allowing for the replacement of sand-water mixtures with different water qualities. The bottom of the water tank 1 is a structure of I-beam steel 13, on which the tank bottom, slide mounting plate 12, motor bracket mounting plate, tank walls, etc. are welded in sequence. The opening of the water tank 1 is equipped with a lifting handle and a ring of reinforcing angle steel.

[0048] In this embodiment, a protective cover 8 is also provided on the water tank 1.

[0049] Specifically, the protective cover 8 is a wire mesh structure, which is installed on one side of the upper edge of the water tank 1 by a hinge and can be rotated open and closed. The water tank 1 is protected by the protective cover 8 to ensure safety during the test.

[0050] In this embodiment, the slide 2 is annular and includes three arc plates. The two ends of the arc plates are respectively provided with bevels, and the three arc plates are connected through the bevels.

[0051] Specifically, a ring-shaped slide 2 is formed by splicing together arc plates.

[0052] Furthermore, the bevel orientation is consistent with the rotation direction of turntable 3 to avoid the friction test being affected by the arc plate interface.

[0053] In this embodiment, the counterweight 7 includes:

[0054] A threaded rod, with a counterweight detachably connected to it;

[0055] Nuts are threaded onto threaded rods and used to fasten counterweights.

[0056] Specifically, the weight of the counterweight is adjusted by increasing or decreasing the number of counterweight pieces and changing their specifications.

[0057] In this embodiment, the driving mechanism includes:

[0058] The motor bracket 9 is connected to the bottom of the water tank 1 at its lower end. The upper end of the motor bracket 9 is provided with a guard plate 11 and a reduction motor 10. The guard plate 11 prevents the sand-water mixture from contacting the reduction motor 10. The turntable 3 is located at the drive end of the reduction motor 10. The cantilever 4 is hinged to the turntable 3.

[0059] Specifically, the motor bracket 9 is installed at the bottom of the circular water tank 1, and the geared motor 10 is mounted on it. The output shaft of the geared motor 10 faces upward and is located at the center of the water tank 1. The inner hole of the turntable is fitted with the output shaft, and the fixing bolts are tightened on the turntable and screwed into the central threaded hole of the motor output shaft.

[0060] In this embodiment, a frequency converter and a SCADA system are also included.

[0061] Specifically, the system is equipped with a frequency converter, allowing the motor to operate at a variable frequency ranging from 50Hz to 25Hz. When the system operates at a power frequency of 50Hz, the linear speed of the wear-resistant shoe 6 is more than 100 times the linear speed of the engineering project. Similarly, when operating at 25Hz, the linear speed of the wear-resistant shoe 6 is more than 50 times the linear speed of the engineering project. The system is equipped with a SCADA system for remote monitoring and control, automatic storage of operating data, and the ability to query historical operating data. The system simulates continuous operation under on-site conditions: water and sediment are added to tank 1, and the rotating arm drives the sediment to move, with the sediment participating in the friction between the wear-resistant shoe 6 and the slide rail 2. Through testing, researchers can quickly obtain key data such as the wear amount of the wear-resistant shoe 6 and the slide rail 2, thereby assessing the degree of material matching of the friction pair.

[0062] In this embodiment, three reversing rods 5 are provided, and multiple slide mounting plates 12 are distributed around the bottom circumference of the water tank 1. The arc plate and the slide mounting plate 12 are detachably connected.

[0063] Specifically, the three reversing rods 5 make the turntable 3 evenly distributed with weight, and with the installation and replacement of the three arc plates, the arc plates can be replaced without disassembling the turntable 3.

[0064] In this embodiment, an adjustment pad is provided between the slide mounting plate 12 and the water tank 1.

[0065] Specifically, the upper surfaces of each curved plate are made flush by adjusting the shims.

[0066] In this embodiment, an I-beam steel 13 is provided at the bottom of the water tank 1.

[0067] Specifically, the support strength of the bottom of the water tank 1 is improved by using I-beam channel steel 13.

[0068] In this embodiment, a friction testing device is used, taking the testing of abrasion-resistant boots as an example: First, the water tank 1 is installed and fixed, then the abrasion-resistant boot 6 to be tested is installed, and the counterweight 7 is fitted to ensure a tight fit between the abrasion-resistant boot 6 and the slide rail 2. Next, a sand-water mixture is filled in, immersing the abrasion-resistant boot 6. Finally, the reduction motor 10 is started, and the speed and duration are adjusted according to the testing requirements. After the time is up, the reduction motor 10 is turned off, the sand-water mixture in the water tank 1 is drained, and the abrasion-resistant boot 6 and slide rail 2 are removed to check the wear condition.

[0069] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A friction testing apparatus, characterized in that, include: A water tank, wherein a slide and a sand-water mixture are provided inside the water tank, the slide is submerged in the sand-water mixture, and a drain pipe and a ball valve are provided on the water tank; A turntable, which rotates unidirectionally, is located at the center of the water tank, and multiple cantilever arms are circumferentially hinged on the turntable; Multiple directional levers are provided, the middle part of which is connected to the end of the cantilever away from the turntable. The directional lever and the cantilever form a T-shaped structure. The lower end of the directional lever is detachably connected to a wear-resistant shoe, which is slidably connected to the slide rail. The upper end of the directional lever is provided with a counterweight. A drive mechanism for driving the turntable to rotate.

2. The friction testing apparatus according to claim 1, characterized in that, The water tank is also equipped with a protective cover.

3. The friction testing apparatus according to claim 1, characterized in that, The slide is circular and includes three arc plates. Each arc plate has a bevel at both ends, and the three arc plates are connected through the bevels.

4. The friction testing apparatus according to claim 1, characterized in that, The counterweight includes: A threaded rod, on which a counterweight is detachably connected; A nut, threaded onto the threaded rod, is used to fasten the counterweight.

5. The friction testing apparatus according to claim 1, characterized in that, The drive mechanism includes: A motor bracket is provided, the lower end of which is connected to the bottom of the water tank. The upper end of the motor bracket is provided with a protective plate and a reduction motor. The protective plate prevents the sand-water mixture from contacting the reduction motor. The turntable is located at the drive end of the reduction motor. The cantilever is hinged to the turntable.

6. The friction testing apparatus according to claim 5, characterized in that, It also includes frequency converters and SCADA systems.

7. The friction testing apparatus according to claim 3, characterized in that, There are three reversing rods, and multiple slide mounting plates are distributed around the bottom circumference of the water tank. The arc plate is detachably connected to the slide mounting plate.

8. The friction testing apparatus according to claim 7, characterized in that, An adjustment pad is provided between the slide mounting plate and the water tank.

9. The friction testing apparatus according to claim 1, characterized in that, The bottom of the water tank is provided with I-beam steel.

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