A wear resistance test device for wear resistant engine piston coatings

Abstract

This utility model relates to the field of piston wear resistance testing technology and discloses a wear resistance testing device for engine piston coatings. The device includes a workbench with a support plate mounted at the rear of its top. A drive cylinder is mounted at the center of the front end of the support plate. Several test sleeves are arranged at the top of the workbench and in front of the support plate. A movable plate is mounted at the end of the drive push rod of the drive cylinder, and several connecting rods are connected to the bottom of the movable plate. A piston body is housed inside each test sleeve, and a piston rod is connected inside the piston body. The device utilizes an insulation chamber, a temperature detector, an electric telescopic rod, and a transparent baffle to facilitate the testing of the wear resistance strength of the piston wear-resistant coating at different temperatures, improving testing effectiveness and allowing for comparison with wear resistance at room temperature or high temperature. It also enables multiple pistons to move rubbed within the test sleeves, improving testing efficiency.

Description

Technical Field

[0001] This utility model relates to the field of piston wear resistance testing technology, specifically a wear resistance testing device for wear-resistant engine piston coatings. Background Technology

[0002] During engine operation, the friction loss between the piston assembly and the cylinder bore accounts for about 45%-65% of the total friction loss of an internal combustion engine. Among them, the friction loss of the piston skirt accounts for about 25% of the total friction loss. Currently, in order to reduce the friction loss of the piston and improve its wear resistance, a wear-resistant coating is usually applied to the piston skirt. After coating, the wear resistance of the piston wear-resistant coating must be sampled and tested to see if it meets the requirements.

[0003] Chinese patent provides a piston wear resistance testing device, publication number CN220367158U, which includes a main plate, a driver fixedly installed on the rear of the main plate, a rotating disk overlapping the front of the driver, and a connecting seat installed through the interior of the rotating disk.

[0004] The above device can cause the connecting rod to move the test piston up and down inside the outer sleeve, thereby simulating the working state of the piston. At the same time, the laser emitter emits and receives the reflected laser, thereby calculating the movement distance of the test piston. Then, the thickness gauge detects the thickness of the test piston, which can directly reflect the movement wear distance and wear degree of the test piston. However, its structure is relatively simple, with both the piston and the outer sleeve exposed to the external environment, making it difficult to simulate the wear resistance of the piston coating at different temperatures, resulting in poor test results. Furthermore, only one piston in the same batch can be tested. To improve test accuracy, multiple pistons usually need to be sampled for testing, and testing them sequentially results in low testing efficiency. Utility Model Content

[0005] The purpose of this invention is to provide a wear resistance testing device for wear-resistant engine piston coatings, which can effectively solve the problems in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A wear resistance testing device for an engine piston coating includes a workbench, a support plate installed at the rear of the top of the workbench, a drive cylinder installed at the center of the front end of the support plate, and several test sleeves arranged at the top of the workbench and in front of the support plate. The drive cylinder has a movable plate installed at the end of its drive push rod. Several connecting rods are connected to the bottom of the movable plate. A piston body is installed inside the test sleeve, and a piston rod is connected inside the piston body. The top of the piston rod is connected to the bottom of the connecting rod by a connecting bolt. An insulation box is installed at the front of the top surface of the workbench. The top of the insulation box has an opening that matches the connecting rod. Several test sleeves are located inside the insulation box. An electric telescopic rod is installed at the front of the top of the insulation box. A transparent baffle is movably installed at the front of the insulation box, and the push rod end of the electric telescopic rod is connected to the transparent baffle.

[0007] Preferably, the transparent baffle is made of transparent sheet material, and a sealing ring is provided at the end of the transparent baffle near the heat preservation box.

[0008] Preferably, a partition is fixedly installed inside the insulation box and directly in front of each test outer sleeve. An electric heating lamp is installed on one side of the upper part of each partition. A temperature sensor that is compatible with the electric heating lamp is installed inside the insulation box.

[0009] Preferably, an installation groove is provided at the front and rear ends of the supporting plate above each test outer sleeve, and a semiconductor cooler is installed in the installation groove. A thickness gauge is installed inside the insulation box and in front of each test outer sleeve via an installation plate.

[0010] Preferably, the cold end of the thermoelectric cooler extends into the interior of the insulation box, the hot end of the thermoelectric cooler is equipped with heat dissipation fins, and a cooling fan is provided at the end of the heat dissipation fins away from the supporting plate.

[0011] Preferably, an electrical control box is installed at the upper rear end of the support plate, and the electrical control box is electrically connected to the electric heating lamp, semiconductor cooler, cooling fan, drive cylinder, electric telescopic rod temperature sensor, and thickness gauge.

[0012] Compared with the prior art, the beneficial effects of this utility model are: This invention, by setting up an insulated box, temperature detector, electric telescopic rod, transparent baffle, electric heating lamp, and semiconductor cooler in conjunction with a test jacket, facilitates the testing of the wear resistance strength of the piston wear-resistant coating at different temperatures, improves the testing effect, and allows for comparison with wear resistance at room temperature or high temperature, providing accurate data for determining whether the piston wear-resistant coating meets process requirements.

[0013] By setting up a drive cylinder, movable plate, connecting rod, connecting bolt, and piston rod to work together, the drive cylinder drives multiple connecting rods to rise and fall, so that multiple pistons can move and rub within the outer sleeve of the test chamber. Multiple pistons can be sampled and tested in batches without individual measurement, which facilitates comparison of data from multiple pistons in each group. At the same time, data from pistons in the same batch can also be compared, which improves testing efficiency. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of a wear-resistant engine piston coating wear resistance testing device according to an embodiment of the present invention; Figure 2 As an embodiment of this utility model Figure 1 Rear view; Figure 3 This is a schematic diagram of the structure of the test outer sleeve, piston rod, and connecting rod in an embodiment of this utility model; Figure 4 This is a schematic diagram of the structure of the test jacket, semiconductor cooler, and electric heating lamp in an embodiment of this utility model.

[0015] In the diagram: 1. Workbench; 2. Support plate; 3. Drive cylinder; 4. Movable plate; 5. Connecting rod; 6. Test jacket sleeve; 7. Piston rod; 8. Connecting bolt; 9. Insulation box; 10. Electric telescopic rod; 11. Transparent baffle; 12. Electric heating lamp; 13. Semiconductor cooler; 14. Heat sink fins; 15. Cooling fan; 16. Thickness gauge; 17. Electrical control box. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Example 1 Combination Figures 1-4 A wear-resistant engine piston coating wear resistance testing device includes a workbench 1, a support plate 2 installed at the rear of the top of the workbench 1, a drive cylinder 3 installed at the center of the front of the support plate 2, and several test sleeves 6 arranged at the top of the workbench 1 and in front of the support plate 2.

[0018] See Figure 2 and Figure 3Furthermore, an insulation box 9 is installed at the front of the top surface of the workbench 1. The top of the insulation box 9 has an opening that adapts to the connecting rod 5. Several test outer sleeves 6 are located inside the insulation box 9. An electric telescopic rod 10 is installed at the front of the top of the insulation box 9. A transparent baffle 11 is movably installed at the front of the insulation box 9, and the end of the push rod of the electric telescopic rod 10 is connected to the transparent baffle 11. The transparent baffle 11 is made of transparent material, and a sealing ring is provided at the end of the transparent baffle 11 near the insulation box 9. Inside the insulation box 9, and directly in front of each test outer sleeve 6, a partition is fixedly installed. Electric heating lamps 12 are installed on one side near the top. Temperature sensors compatible with the electric heating lamps 12 are installed inside the insulation box 9. Mounting slots are provided above each test outer sleeve 6, passing through the front and rear ends of the support plate 2. Semiconductor coolers 13 are installed in the mounting slots. Thickness gauges 16 are installed inside the insulation box 9 and in front of each test outer sleeve 6 via mounting plates. The cold end of the semiconductor cooler 13 extends into the insulation box 9. Heat dissipation fins 14 are installed on the hot end of the semiconductor cooler 13. A cooling fan 15 is provided at the end of the heat dissipation fins 14 away from the support plate 2.

[0019] Specifically, during the piston coating wear resistance test, multiple test sleeves 6 are placed inside a sealed insulated chamber 9, and a temperature sensor is installed inside the insulated chamber 9 to monitor the temperature inside the chamber 9 in real time. When it is necessary to increase the test temperature, the cooling fan 15 can be powered on to raise the temperature inside the insulated chamber 9. At the same time, the temperature inside the connecting rod 5 can be reduced by activating the semiconductor cooler 13 to absorb heat at its cold end. When the cold end of the drive cylinder 3 absorbs heat, the cooling fan 15 can be activated to improve the heat dissipation efficiency of the hot end of the semiconductor cooler 13, thereby improving the cooling effect. By controlling the temperature inside the insulated chamber 9 through the above steps, the wear resistance performance of the piston coating at different temperatures can be tested to improve the test results.

[0020] Example 2 See Figure 2 and Figure 4 Furthermore, based on Embodiment 1, the following is further obtained: a movable plate 4 is installed at the end of the drive push rod of the drive cylinder 3; several connecting rods 5 are connected to the bottom end of the movable plate 4; a piston body is provided inside the test sleeve 6; a piston rod 7 is connected inside the piston body; the top end of the piston rod 7 is connected to the bottom end of the connecting rod 5 by a connecting bolt 8; an electrical control box 17 is installed at the upper rear end of the support plate 2; the electrical control box 17 is electrically connected to the electric heating lamp 12, the semiconductor cooler 13, the cooling fan 15, the drive cylinder 3, the electric telescopic rod 10, the temperature sensor, and the thickness gauge 16.

[0021] Specifically, during the piston wear resistance test, the piston is mounted on the bottom end of the connecting rod 5 via the piston rod 7 and connecting bolt 8, and the top end of the connecting rod 5 is connected to the bottom surface of the movable plate 4. At the same time, the end of the push rod of the drive cylinder 3 is connected to the top end of the movable plate 4. Thus, by controlling the extension and retraction of the push rod of the drive cylinder 3, the piston connected to the piston rod 7 can be driven to move up and down reciprocally inside the test sleeve 6. Since there are multiple connecting rods 5 and test sleeves 6, this step allows for batch testing of the piston coating wear resistance to improve testing efficiency. At the same time, data from multiple pistons in the same batch can be compared, as well as the average value of the same batch, improving the accuracy of the test data.

[0022] In actual operation, the steps of detecting the piston thickness using the thickness gauge 16 in the existing technology will not be repeated here. When testing the wear resistance of the piston coating, multiple test sleeves 6 are placed inside a sealed insulated box 9, and a temperature sensor is installed inside the insulated box 9 to monitor the temperature inside the insulated box 9 in real time. When it is necessary to increase the test temperature, the cooling fan 15 can be powered on to raise the temperature inside the insulated box 9. At the same time, the temperature inside the connecting rod 5 can be reduced by activating the semiconductor cooler 13 to absorb heat at its cold end. When the cold end of the drive cylinder 3 absorbs heat, the cooling fan 15 can be activated to improve the heat dissipation efficiency of the hot end of the semiconductor cooler 13, thereby improving the cooling effect. By controlling the temperature inside the insulated box 9 through the above steps, the wear resistance of the piston coating at different temperatures can be tested to improve the test results. During piston wear resistance testing, the piston is mounted on the bottom end of the connecting rod 5 via piston rod 7 and connecting bolt 8, and the top end of the connecting rod 5 is connected to the bottom surface of the movable plate 4. At the same time, the end of the push rod of the drive cylinder 3 is connected to the top end of the movable plate 4. Thus, by controlling the extension and retraction of the push rod of the drive cylinder 3, the piston connected to the piston rod 7 can be driven to move up and down reciprocally inside the test sleeve 6. Since there are multiple connecting rods 5 and test sleeves 6, this step allows for batch testing of piston coating wear resistance to improve testing efficiency. At the same time, data from multiple pistons in the same batch can be compared, as well as the average value of the same batch, to improve the accuracy of the test data. When the piston needs to be replaced, the push rod of the electric telescopic rod 10 can be extended to move the transparent baffle 11 away from the insulation box 9, thereby removing the obstruction to the test outer sleeve 6. Then, the personnel can use a socket wrench or other suitable tools to unscrew the connecting bolt 8, and after controlling the connecting rod 5 to be adjusted to the appropriate position, the piston rod 7 and the piston can be taken out from the test outer sleeve 6. A new piston can be replaced later, and its piston rod 7 can be reconnected to the connecting rod 5 for testing. Furthermore, the display and control components and modules used in the aforementioned drive cylinder 3, electric heating lamp 12, semiconductor cooler 13, cooling fan 15, thickness gauge 16, temperature sensor, and electric telescopic rod 10 are all existing technologies, which can be fully implemented by those skilled in the art. The power supply is also common knowledge in the field and need not be elaborated upon. The content protected by this utility model does not involve any improvement to the software and methods.

[0023] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A wear resistance test apparatus for wear resistant engine piston coating, characterized by: Includes a workbench (1), a support plate (2) is installed at the rear of the top of the workbench (1), a drive cylinder (3) is installed at the center of the front end of the support plate (2), and several test jackets (6) are provided at the top of the workbench (1) and in front of the support plate (2). The drive push rod of the drive cylinder (3) is equipped with a movable plate (4), and the bottom end of the movable plate (4) is connected to several connecting rods (5). The test outer sleeve (6) is equipped with a piston body, and the piston body is connected to a piston rod (7). The top end of the piston rod (7) is connected to the bottom end of the connecting rod (5) by a connecting bolt (8). The top surface of the workbench (1) is equipped with a heat preservation box (9) at the front position. The top end of the heat preservation box (9) is equipped with a passage that is compatible with the connecting rod (5). Several test outer sleeves (6) are located inside the heat preservation box (9). The top end of the heat preservation box (9) is equipped with an electric telescopic rod (10). The front end of the heat preservation box (9) is movably equipped with a transparent baffle (11), and the push rod end of the electric telescopic rod (10) is connected to the transparent baffle (11).

2. A wear resistance test apparatus for wear resistant engine piston coatings according to claim 1, characterized in that: The transparent baffle (11) is made of transparent material, and a sealing ring is provided at one end of the transparent baffle (11) near the heat preservation box (9).

3. A wear resistance test apparatus for wear resistant engine piston coatings as defined in claim 1, characterized in that: Inside the insulation box (9) and directly in front of each test outer sleeve (6), there is a partition. An electric heating lamp (12) is installed on one side of the upper part of each partition. The insulation box (9) is equipped with a temperature sensor that is compatible with the electric heating lamp (12).

4. A wear resistance test apparatus for wear resistant engine piston coatings as defined in claim 3, characterized in that: An installation slot is provided at the front and rear ends of the support plate (2) above each test outer sleeve (6). A semiconductor cooler (13) is installed in the installation slot. A thickness gauge (16) is installed inside the insulation box (9) and in front of each test outer sleeve (6) via an installation plate.

5. A wear resistance test apparatus for wear resistant engine piston coatings as defined in claim 4, characterized in that: The cold end of the semiconductor cooler (13) extends into the interior of the insulation box (9), and the hot end of the semiconductor cooler (13) is equipped with heat dissipation fins (14). A cooling fan (15) is provided at the end of the heat dissipation fins (14) away from the support plate (2).

6. A wear resistance test apparatus for a wear resistant engine piston coating according to claim 5, characterized in that: An electrical control box (17) is installed at the upper rear end of the support plate (2). The electrical control box (17) is electrically connected to the electric heating lamp (12), the semiconductor cooler (13), the cooling fan (15), the drive cylinder (3), the electric telescopic rod (10), the temperature sensor, and the thickness gauge (16).

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