A cooling liquid corrosion performance testing device and method

Abstract

The application discloses a kind of cooling liquid corrosion performance test equipment and method, belong to test equipment field;The equipment includes test box, the middle part of test box is provided with partition, and the upper portion of test box is installed with box cover, and the lower portion of box cover is installed with longitudinal test piece and transverse test piece;It also includes two groups of liquid suction pipes and two groups of flushing pipes connected to two groups of liquid suction pipes;Box cover is rotatably connected with rotating shaft, and rotating shaft can drive cooling liquid to flow in liquid suction pipe and flushing pipe when rotating, and electric heating wire is arranged in the tank wall of test box, and the flow rate of cooling liquid can be increased when the rotating speed of rotating shaft increases, and vibration is applied to the box cover, and the power of electric heating wire is increased;The method includes simulating engine operating conditions by controlling whether motor is running;The application can simulate multiple conditions such as temperature, flow rate, vibration and air contact simultaneously, and has high flexibility and test efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of test equipment, in particular to a cooling liquid corrosion performance test equipment and method. BACKGROUND

[0002] During the operation of the engine, the cooling liquid needs to be in contact with cast iron, low-carbon steel, aluminum alloy, red copper, solder, and other metals in the cooling system for a long time. The corrosion inhibition ability of the cooling liquid directly determines the service life and operation safety of the engine. If the corrosion performance of the cooling liquid does not meet the standards, it will cause problems such as rust, corrosion pits, and coating peeling on the metal parts, and further cause water leakage in the cooling system, reduced heat dissipation efficiency, and even engine overheating and scrap. Therefore, accurate corrosion performance testing of the cooling liquid is a core link in the production and quality control of the industry.

[0003] The current mainstream cooling liquid corrosion performance testing methods, such as the ASTM D1384 static immersion method and the ASTM D2809 dynamic circulation method, have formed standardized processes, but there are still many limitations in actual testing. On the one hand, existing test equipment cannot fully simulate the complex working conditions of the engine: static test equipment can only achieve immersion environment at a constant temperature and cannot reproduce the flow and scouring state of the cooling liquid in the engine. Although some dynamic test equipment can simulate flow rate, it cannot simultaneously reproduce the vibration effect generated during engine operation, resulting in a deviation between the test results and the actual use scenario, making it difficult to accurately evaluate the corrosion protection ability of the cooling liquid under the synergistic action of "temperature-flow rate-vibration".

[0004] On the other hand, the testing efficiency and flexibility of existing equipment are insufficient. Traditional equipment can usually only test metal samples in a single posture (such as horizontal or vertical), and if the corrosion effect of the cooling liquid on metal parts with different installation angles needs to be verified, the test needs to be performed in batches, which is cumbersome and time-consuming. At the same time, the temperature control, flow rate adjustment, and vibration simulation modules of most equipment are independent of each other, and cannot achieve parameter linkage adjustment. For example, when the flow rate is increased, it is difficult to simultaneously match the temperature and vibration intensity under the corresponding working condition of the engine, limiting the authenticity of the test working condition. In addition, some equipment do not have a reasonable air contact channel to ensure sealing, and cannot simulate the contact state of the cooling liquid and air in the cooling system. Oxygen in the air is a key factor affecting electrochemical corrosion, and this design defect further reduces the accuracy of the test results. SUMMARY

[0005] The present application aims to provide a cooling liquid corrosion performance test equipment and method, which solves the problem of poor simulation of working conditions by existing test equipment.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a coolant corrosion performance testing device, comprising a test chamber, a partition provided in the middle of the test chamber, a cover installed on the test chamber, and longitudinal and transverse test specimens installed at the lower part of the cover, the longitudinal and transverse test specimens being located on both sides of the partition.

[0007] It also includes two sets of liquid extraction tubes and two sets of flushing tubes connected to the two sets of liquid extraction tubes. The liquid extraction tubes pass through the box cover and are connected to the test box, and the flushing tubes pass through the side wall of the test box and are connected to the test box.

[0008] A rotating shaft is rotatably connected to the cover of the test chamber. When the rotating shaft rotates, it can drive the coolant to flow in the suction pipe and the flushing pipe. An electric heating wire is installed inside the wall of the test chamber. When the rotation speed of the rotating shaft increases, it can increase the flow rate of the coolant, apply vibration to the cover of the test chamber, and drive the power of the electric heating wire to increase.

[0009] Preferably, the end of the flushing pipe is slidably sleeved with a sliding tube, the end of the sliding tube is connected to an outwardly expanding conical cover, the conical cover faces the test piece, and a first tension spring is connected between the conical cover and the inner wall of the test chamber. When the flow rate of the coolant increases, the pressure increases synchronously and overcomes the tension of the first tension spring, so that the conical cover moves closer to the test piece.

[0010] Preferably, a drive gear is fixedly connected to the rotating shaft, and two water pumps connected to the two liquid extraction pipes are installed on the box cover. Each of the two water pump shafts is connected to a driven gear that meshes with the drive gear.

[0011] Preferably, each of the two suction tubes is connected to a pressure transmission tube, and a sliding rod is slidably connected inside the two pressure transmission tubes. The ends of the two sliding rods are connected to a mounting bracket. A sliding switch for controlling the heating wire is provided on the box cover, and the slider of the sliding switch is fixedly connected to the mounting bracket.

[0012] Preferably, an eccentric block is radially slidably connected to the side wall of the rotating shaft. When the rotational speed of the rotating shaft increases, the eccentric block slides radially and moves away from the rotating shaft.

[0013] Preferably, a rod is inserted into the middle of the rotating shaft, a connecting rod is hinged to the rod, and the end of the connecting rod is hinged to the eccentric block. When the rod slides, it can push or pull the eccentric block through the connecting rod.

[0014] Preferably, a mounting ring is fixedly connected to the end of the insertion rod, a second tension spring is connected between the mounting ring and the end of the rotating shaft, and the mounting bracket is rotatably connected to the mounting ring.

[0015] Preferably, a motor is mounted on the cover, and the rotating shaft is connected to the output end of the motor.

[0016] Preferably, the device also includes a base, with four cylinders and four pull ropes fixedly connected to the four corners of the base. A lifting plate is fixedly connected to the top of the four cylinders. The test box is placed on the lifting plate. The four pull ropes pass through the lifting plate and are fixedly connected to the bottom wall of the test box. When the cylinders extend or retract, they can drive the pull ropes to tighten or loosen, thereby locking or unlocking the test box.

[0017] A method for testing the corrosion performance of a coolant, using a coolant corrosion performance testing device, includes the following steps:

[0018] Prepare two metal sheets of each of the following materials: cast iron, low carbon steel, aluminum alloy, copper, and solder. Divide them into groups of five. One group of metal sheets is installed horizontally under the cover to form a horizontal test specimen, and the other group is installed vertically under the cover to form a vertical test specimen. Inject the coolant to be tested into the test chamber, and then install the cover on the test chamber so that the horizontal and vertical test specimens are located on both sides of the partition.

[0019] The heating wire of the test chamber is controlled to operate according to the test requirements. If it is not running, the sample can be tested for corrosion at room temperature. If it is running, the sample can be tested for corrosion at high temperature.

[0020] To simulate engine operating conditions, the heating wire is controlled to run, and then the motor is started to make the shaft rotate. The shaft drives two water pumps to run, so that the coolant flows and washes onto the transverse and longitudinal specimens respectively.

[0021] Increasing the speed of the control motor increases the flow rate and pressure of the coolant, thereby increasing the scouring force on the specimen. Simultaneously, the pressure drives the mounting bracket to slide, which in turn drives the heating wire to increase its power. This, in turn, drives the eccentric block to slide radially on the shaft. The rotation of the shaft at this time intensifies the vibration of the casing cover, thus simulating an operating condition close to that of an engine.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0023] This invention uses a motor to drive a rotating shaft to flow coolant, allowing the coolant to scour both transverse and longitudinal specimens. By setting different coolant scour angles, the corrosiveness of the coolant can be further tested. In addition, when the shaft rotates, it can also apply vibration to the casing cover, which is transmitted to the specimens to simulate the vibration conditions of an engine during operation. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the structure of the base of the present invention;

[0026] Figure 3 This is a schematic diagram of the structure of the test box of the present invention;

[0027] Figure 4 This is a schematic diagram of the structure at the partition of the present invention;

[0028] Figure 5 This is a schematic diagram of the structure at the rotating shaft of the present invention;

[0029] Figure 6 This is a schematic diagram of the structure of the slide bar in this invention;

[0030] Figure 7 This is a schematic diagram of the insertion rod of the present invention.

[0031] In the diagram: 100, base; 110, cylinder; 120, lifting plate; 130, pull rope; 200, test box; 201, partition; 210, box cover; 220, transverse specimen; 230, longitudinal specimen; 240, liquid extraction tube; 250, flushing tube; 251, slide tube; 252, conical cover; 253, first tension spring; 300, motor; 310, rotating shaft; 320, drive gear; 330, water pump; 340, driven gear; 400, pressure transmission tube; 410, mounting bracket; 411, slide rod; 420, sliding switch; 421, slide plate; 500, insertion rod; 510, connecting rod; 520, eccentric block; 530, mounting ring; 540, second tension spring. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Reference Figures 1-7This embodiment provides a technical solution: a coolant corrosion performance testing device, including a test chamber 200, a partition 201 in the middle of the test chamber 200, a cover 210 on the test chamber 200, and longitudinal specimens 230 and transverse specimens 220 installed on the lower part of the cover 210, the longitudinal specimens 230 and transverse specimens 220 being located on both sides of the partition 201 respectively; it also includes two sets of suction pipes 240 and two sets of flushing pipes 250 connected to the two sets of suction pipes 240 for suction. Pipe 240 passes through cover 210 and is connected to test chamber 200. Flushing pipe 250 passes through the side wall of test chamber 200 and is connected to test chamber 200. A rotating shaft 310 is rotatably connected to cover 210. When the rotating shaft 310 rotates, it can drive the coolant to flow in the suction pipe 240 and flushing pipe 250. A heating wire is installed in the wall of test chamber 200. When the rotation speed of the rotating shaft 310 increases, it can increase the flow rate of the coolant, apply vibration to cover 210, and drive the power of the heating wire to increase.

[0034] Add the required coolant to the test chamber 200. Prepare two metal sheets of each of cast iron, low carbon steel, aluminum alloy, copper, and solder, or select two metal sheets of each of the other five metals according to the test requirements. Install the two sets of metal sheets horizontally and vertically on the lower part of the cover 210. The lower part of the cover 210 is equipped with clips to hold the metal sheets (not shown in the figure). Then put the cover 210 on the test chamber 200. A hole can also be opened on the test chamber 200 or a vertical pipe can be installed to allow the internal metal plates and coolant to come into contact with air. The heating wire is controlled to be turned on or off according to the test requirements. When it is off, the room temperature corrosion ability of the coolant can be tested. When it is on, the high temperature corrosion ability of the coolant can be tested.

[0035] To simulate the working conditions of coolant under heavy engine load, the starter motor 300 causes the shaft 310 to drive the coolant flow, so that the coolant washes over the transverse specimen 220 and the longitudinal specimen 230. By setting different coolant wash angles, the corrosiveness of the coolant can be further tested.

[0036] In addition, when the shaft 310 rotates, it can also apply vibration to the cover 210, and the vibration is transmitted to the test piece to simulate the vibration conditions when the engine is running.

[0037] The end of the flushing pipe 250 is slidably sleeved with a slide pipe 251, and the end of the slide pipe 251 is connected to an outwardly expanding conical cover 252. The conical cover 252 faces the test piece, and a first tension spring 253 is connected between the conical cover 252 and the inner wall of the test chamber 200. When the coolant flow rate increases, the pressure increases synchronously and overcomes the tension of the first tension spring 253, so that the conical cover 252 moves closer to the test piece.

[0038] When the rotational speed of the shaft 310 is low, the flow rate and pressure of the coolant are also low. At this time, the coolant diffuses through the conical cover 252 and rushes towards the test piece. The scouring force applied to the test piece is low. When the rotational speed of the shaft 310 increases, the flow rate and pressure of the coolant increase, thereby increasing the impact force on the test piece. The opening of the conical cover 252 is equipped with a filter screen, which intercepts the impurity particles contained in the coolant during circulation, preventing impurities from hitting the test piece and causing deviations in the test results. Furthermore, when the flow pressure of the coolant increases, the pressure inside the conical cover 252 also increases. At this time, the pressure overcomes the tension of the first tension spring 253, causing the slide tube 251 to slide on the flushing tube 250, thereby bringing the conical cover 252 closer to the test piece and further increasing the scouring force of the coolant.

[0039] The number of flushing pipes 250 is equal to the number of test specimens. The liquid extraction pipe 240 is connected to multiple flushing pipes 250 on the same side, and a diversion valve can be installed at the connection point to make the injection pressure and flow rate of multiple flushing pipes 250 equal.

[0040] A drive gear 320 is fixedly connected to the rotating shaft 310, and two water pumps 330 connected to two liquid extraction pipes 240 are installed on the cover 210. The pump shafts of the two water pumps 330 are connected to driven gears 340 that mesh with the drive gear 320.

[0041] When the shaft 310 rotates, the drive gear 320 rotates synchronously. At this time, the drive gear 320 drives the two driven gears 340 to rotate, thereby causing the two water pumps 330 to run and allowing the coolant to flow.

[0042] Both suction tubes 240 are connected to pressure transmission tubes 400. Sliding rods 411 are slidably connected inside the two pressure transmission tubes 400. The ends of the two sliding rods 411 are connected to a mounting bracket 410. A sliding switch 420 for controlling the heating wire is provided on the cover 210. The slider 421 of the sliding switch 420 is fixedly connected to the mounting bracket 410.

[0043] The pressure transmission tube 400 is connected to the liquid outlet side of the liquid extraction tube 240. When the outflow pressure of the liquid extraction tube 240 increases, the pressure is transmitted to the pressure transmission tube 400 to push the slide rod 411 to slide. At this time, the slide rod 411 drives the mounting bracket 410 to move, thereby driving the sliding plate 421 to slide, which increases the power of the heating wire and simulates the working condition of the engine speed increasing and the temperature rising.

[0044] An eccentric block 520 is radially slidably connected to the side wall of the rotating shaft 310. When the rotational speed of the rotating shaft 310 increases, the eccentric block 520 slides radially and moves away from the rotating shaft 310.

[0045] As the rotational speed of the shaft 310 increases, the eccentric block 520 slides radially on the shaft 310, thereby intensifying the vibration generated when the shaft 310 rotates and transmitting it to the sample, simulating the condition where the vibration intensity increases with the increase of engine speed.

[0046] A rod 500 is inserted into the middle of the rotating shaft 310, and a connecting rod 510 is hinged to the rod 500. The end of the connecting rod 510 is hinged to the eccentric block 520. When the rod 500 slides, it can push or pull the eccentric block 520 through the connecting rod 510.

[0047] The insertion rod 500 is coaxially arranged with the rotating shaft 310. When the insertion rod 500 is pulled out of the rotating shaft 310, the insertion rod 500 drives the connecting rod 510 to swing towards a more vertical state. As a result, the connecting rod 510 pushes the eccentric block 520 radially away from the rotating shaft 310, which strengthens the vibration generated by the rotation of the rotating shaft 310. When the insertion rod 500 slides towards the inside of the rotating shaft 310, the insertion rod 500 drives the connecting rod 510 to move towards a more horizontal state. At this time, the connecting rod 510 pulls the eccentric block 520 radially closer to the rotating shaft 310, which reduces the vibration generated by the rotation of the rotating shaft 310.

[0048] An installation ring 530 is fixedly connected to the end of the insertion rod 500. A second tension spring 540 is connected between the installation ring 530 and the end of the rotating shaft 310. The mounting bracket 410 is rotatably connected to the installation ring 530.

[0049] The second tension spring 540 allows the insert rod 500 to resist the pushing force of the pressure inside the pressure transmission pipe 400 applied to the slide rod 411, so that the insert rod 500 will not slip when the water pump 330 rotates at a low speed, and the insert rod 500, the mounting ring 530 and the rotating shaft 310 rotate synchronously, thereby preventing the second tension spring 540 from being twisted.

[0050] A motor 300 is mounted on the cover 210, and the shaft 310 is connected to the output end of the motor 300.

[0051] When the motor 300 starts, it can drive the rotating shaft 310 to rotate, thereby simulating the working conditions of the engine under high load.

[0052] It also includes a base 100, with four cylinders 110 and four pull ropes 130 fixedly connected to the four corners of the base 100. The tops of the four cylinders 110 are fixedly connected to a lifting plate 120. The test box 200 is placed on the lifting plate 120. The four pull ropes 130 pass through the lifting plate 120 and are fixedly connected to the bottom wall of the test box 200. When the cylinders 110 extend or retract, they can drive the pull ropes 130 to tighten or loosen, thereby locking or unlocking the test box 200.

[0053] When the system detects that the motor 300 starts, it simultaneously controls the cylinder 110 to shorten slightly. At this time, the lifting plate 120 moves down, so the pull rope 130 is not taut. At this time, the test box 200 is unlocked from the lifting plate 120, so the vibration generated when the rotating shaft 310 rotates will not be rigidly transmitted to the base 100. At this time, the test box 200 will move slightly relative to the lifting plate 120 with the vibration, avoiding damage caused by rigid connection.

[0054] A method for testing the corrosion performance of a coolant, using a coolant corrosion performance testing device, includes the following steps:

[0055] Prepare two metal sheets of each of the following materials: cast iron, low carbon steel, aluminum alloy, copper, and solder. Divide them into groups of five. One group of metal sheets is installed horizontally under the cover 210 to form a horizontal test specimen 220, and the other group is installed vertically under the cover 210 to form a vertical test specimen 230. Inject the coolant to be tested into the test chamber 210, and then install the cover 210 on the test chamber 200, so that the horizontal test specimen 220 and the vertical test specimen 230 are located on both sides of the partition 201.

[0056] The heating wire of the test chamber 200 is controlled to operate according to the test requirements. If it is not operated, the sample can be tested for corrosion at room temperature. If it is operated, the sample can be tested for corrosion at high temperature.

[0057] To simulate engine operating conditions, the heating wire is controlled to run, and the motor 300 is started to make the rotating shaft 310 rotate. The rotating shaft 310 drives the two water pumps 330 to run, so that the coolant flows and washes onto the transverse specimen 220 and the longitudinal specimen 230 respectively.

[0058] Increasing the speed of the control motor 300 increases the flow rate and pressure of the coolant, thereby increasing the scouring force on the specimen. Simultaneously, the pressure drives the mounting bracket 410 to slide, which in turn drives the heating wire to increase its power. This, in turn, drives the eccentric block 520 to slide radially on the rotating shaft 310. The rotation of the rotating shaft 310 at this time intensifies the vibration of the cover 200, thus simulating an operating condition close to that of an engine.

[0059] Although embodiments of the 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 these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A coolant corrosion performance testing device, comprising a test chamber (200), characterized in that: A partition (201) is provided in the middle of the test box (200), and a box cover (210) is installed on the test box (200). A longitudinal specimen (230) and a transverse specimen (220) are installed on the lower part of the box cover (210). The longitudinal specimen (230) and the transverse specimen (220) are respectively located on both sides of the partition (201). It also includes two sets of liquid extraction tubes (240) and two sets of flushing tubes (250) connected to the two sets of liquid extraction tubes (240). The liquid extraction tubes (240) pass through the box cover (210) and are connected to the test box (200). The flushing tubes (250) pass through the side wall of the test box (200) and are connected to the test box (200). A rotating shaft (310) is rotatably connected to the cover (210). When the rotating shaft (310) rotates, it can drive the coolant to flow in the liquid extraction pipe (240) and the flushing pipe (250). The test chamber (200) is equipped with a heating wire inside the chamber wall. When the rotation speed of the rotating shaft (310) increases, it can increase the flow rate of the coolant, apply vibration to the cover (210), and drive the power of the heating wire to increase. The end of the flushing pipe (250) is slidably sleeved with a slide pipe (251), and the end of the slide pipe (251) is connected to an outwardly expanding conical cover (252). The conical cover (252) faces the specimen. A first tension spring (253) is connected between the conical cover (252) and the inner wall of the test chamber (200). When the flow rate of the coolant increases, the pressure increases synchronously and overcomes the tension of the first tension spring (253), so that the conical cover (252) moves closer to the specimen. A drive gear (320) is fixedly connected to the rotating shaft (310), and two water pumps (330) connected to the two liquid extraction pipes (240) are installed on the box cover (210). The pump shafts of the two water pumps (330) are each connected to a driven gear (340) that meshes with the drive gear (320). Both of the two liquid extraction tubes (240) are connected to pressure transmission tubes (400), and slide rods (411) are slidably connected inside the two pressure transmission tubes (400). The ends of the two slide rods (411) are connected to a mounting bracket (410). A sliding switch (420) for controlling the heating wire is provided on the box cover (210), and the slider (421) of the sliding switch (420) is fixedly connected to the mounting bracket (410). An eccentric block (520) is radially slidably connected to the side wall of the rotating shaft (310). When the rotational speed of the rotating shaft (310) increases, the eccentric block (520) slides radially and moves away from the rotating shaft (310). A rod (500) is inserted into the middle of the rotating shaft (310), and a connecting rod (510) is hinged to the rod (500). The end of the connecting rod (510) is hinged to the eccentric block (520). When the rod (500) slides, it can push or pull the eccentric block (520) through the connecting rod (510).

2. The coolant corrosion performance testing equipment according to claim 1, characterized in that: The end of the insertion rod (500) is fixedly connected to an installation ring (530), and a second tension spring (540) is connected between the installation ring (530) and the end of the rotating shaft (310). The mounting bracket (410) is rotatably connected to the installation ring (530).

3. The coolant corrosion performance testing equipment according to claim 2, characterized in that: A motor (300) is mounted on the cover (210), and the shaft (310) is connected to the output end of the motor (300).

4. The coolant corrosion performance testing equipment according to claim 1, characterized in that: It also includes a base (100), with four cylinders (110) and four pull ropes (130) fixedly connected to the four corners of the base (100). The top of the four cylinders (110) is fixedly connected to a lifting plate (120). The test box (200) is placed on the lifting plate (120). The four pull ropes (130) pass through the lifting plate (120) and are fixedly connected to the bottom wall of the test box (200). When the cylinders (110) extend or retract, they can drive the pull ropes (130) to tighten or loosen, thereby locking or unlocking the test box (200).

5. A method for testing the corrosion performance of a coolant, using the coolant corrosion performance testing equipment described in claim 3, characterized in that, Includes the following steps: Prepare two metal sheets of each of the following materials: cast iron, low carbon steel, aluminum alloy, copper, and solder. Divide them into groups of five. One group of metal sheets is installed horizontally on the lower part of the cover (210) to form a horizontal test piece (220), and the other group is installed vertically on the lower part of the cover (210) to form a vertical test piece (230). Inject the coolant to be tested into the test chamber (210), and then install the cover (210) on the test chamber (200) so that the horizontal test piece (220) and the vertical test piece (230) are located on both sides of the partition (201). The heating wire of the test chamber (200) is controlled to operate according to the test requirements. If it is not running, the sample can be tested for corrosion at room temperature. If it is running, the sample can be tested for corrosion at high temperature. To simulate engine operating conditions, the heating wire is controlled to run, and the motor (300) is started to make the shaft (310) rotate. The shaft (310) drives two water pumps (330) to run, so that the coolant flows and washes onto the transverse specimen (220) and the longitudinal specimen (230) respectively. The increased speed of the control motor (300) increases the flow rate and pressure of the coolant, which in turn increases the scouring force on the specimen. At the same time, the pressure drives the mounting bracket (410) to slide, and the mounting bracket (410) drives the heating wire to increase its power. Simultaneously, it drives the eccentric block (520) to slide radially on the rotating shaft (310). At this time, the rotation of the rotating shaft (310) can intensify the vibration of the cover (200), thereby simulating the operating conditions close to those of an engine.

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