A sample rotating device for a lubricating oil oxidation stability tester b method

Abstract

The utility model discloses a kind of sample rotating devices of lubricating oil oxidation stability tester B method, including metal bath, metal bath is equipped with metal elastic body, and is equipped with flat cover, the bottom of the metal elastic body is equipped with a magnetic force rotating cup holder;The bottom of the metal bath is equipped with a magnet, and the magnet is connected motor by rotating shaft.The utility model has the advantages compared with prior art: the sample in the glass sample container rotates at a constant speed, which improves the accuracy of test results, test success rate and test efficiency.

Description

Technical Field

[0001] This utility model relates to a rotating device, specifically a sample rotating device for method B of the lubricating oil oxidation stability tester. Background Technology

[0002] Lubricating oil oxidation stability refers to the ability of lubricating oil to resist heat and oxidation and maintain its properties without permanent changes during long-term storage or use under prolonged high-temperature conditions. Oxidation of lubricating oil can corrode metal parts, shortening their service life; increase viscosity, form dark precipitates, and clog oil passages; and affect lubrication and heat dissipation. Only by improving the oxidation stability of lubricating oil can its service life be extended.

[0003] The rotating oxygen bomb method lubricating oil oxidation stability tester is designed and manufactured according to the People's Republic of China industry standard "NB / SH / T0193-2022 Determination of Oxidation Stability of Lubricating Oils - Rotating Oxidation Bomb Method". It is a specialized instrument for determining the oxidation stability index of lubricating oils. This standard includes Method A and Method B, where Method A uses an oil bath for testing, and Method B uses a metal bath for testing.

[0004] The specific operating procedure for Method B of the rotating oxygen bomb method for testing the oxidation stability of lubricating oil is as follows:

[0005] Place the sample, water, and copper catalyst coil into a covered glass container, place it in a magnetic cup, and then place the magnetic cup in a metal bath equipped with a pressure gauge at room temperature. Fill the bath with oxygen at a pressure of 620 kPa and then heat it to the specified temperature.

[0006] Then, the oxygen bomb or magnetic cup is rotated axially at 30° with respect to the horizontal plane at a speed of 100 r / min. The time (min) required for the test to reach the specified pressure drop is the oxidation stability of the sample.

[0007] The commonly used method in Method B, which involves tilting the sample container at a 30° angle, involves placing the glass container containing the sample inside a magnetic cup. The magnetic cup is then driven magnetically by a rotating motor located at the pressure-type bottom of the cup. The bottom of the magnetic cup has a pivot point (a polyetheretherketone screw cap) to reduce friction between the magnetic cup and the pressure-type bottom.

[0008] In Method B, the magnetic cup is made of stainless steel and is relatively heavy. During the test, a glass container containing the sample is placed inside the magnetic cup. The cup is rotated using a rotary motor driven by magnetic force, with the sample inside the glass container rotating at a fixed speed, while the heavier the magnetic cup requires a greater driving magnetic force to maintain its rotation. During rotation, the glass container inside the magnetic cup has a large rotational inertia, causing contact or friction between the outer wall of the glass container and the inner wall of the magnetic cup.

[0009] Existing problems and shortcomings:

[0010] 1. Due to the large rotational inertia of the glass sample container inside the magnetic cup during rotation, contact or friction may occur between the outer wall of the glass sample container and the inner wall of the magnetic cup, resulting in uneven rotation of the sample inside the glass sample container or gaps in rotation.

[0011] 2. Due to the possibility of uneven rotation of the sample in the glass sample container or intermittent stoppage, there may be defects such as uneven and insufficient mixing of the sample.

[0012] 3. Due to the occurrence of uneven and insufficient mixing of the sample, the basic requirement of the test method for even and sufficient mixing of the sample cannot be met, which may lead to poor accuracy of the test results or even test failure.

[0013] 4. Similar to point 1 above, there is a defect where the outer wall of the glass sample container and the inner wall of the magnetic cup are severely worn, affecting their service life.

[0014] Therefore, developing a sample rotation device for method B of the lubricating oil oxidation stability tester has become an urgent problem to be solved by those skilled in the art. Utility Model Content

[0015] To address the shortcomings of existing technologies, this invention aims to provide a sample rotation device for Method B of the lubricating oil oxidation stability test apparatus. This device solves the defects of uneven sample rotation or intermittent stoppages, ensuring uniform and sufficient sample mixing, improving the accuracy of test results, and resolving potential test failures. Simultaneously, it addresses the problem of severe wear on the outer wall of the glass sample container and the inner wall of the magnetic cup, thereby extending the service life of both containers and ultimately improving the service life of the sample rotation device for Method B.

[0016] The above-mentioned objective of this utility model is achieved through the following technical solution: a sample rotation device for a method B of a lubricating oil oxidation stability tester, comprising a metal bath, a metal projectile installed inside the metal bath and provided with a flat cover, and a magnetic rotating cup holder provided at the bottom of the metal projectile; a magnet is provided at the bottom of the metal bath, and the magnet is connected to a motor through a rotating shaft.

[0017] Furthermore, the magnetic rotating cup holder includes a magnetic base, on which a fixing piece for fixing the glass sample container is provided. The bottom of the magnetic rotating cup holder is provided with a screw, which is the contact point and support point between the bottom of the magnetic base and the bottom of the metal projectile. Its function is to make the bottom of the magnetic base and the bottom of the metal projectile form a point contact structure.

[0018] Furthermore, the magnetic base is provided with a magnetic groove, a magnet is installed in the magnetic groove, and a magnetic groove cover is provided.

[0019] The advantages of this utility model compared with the prior art are:

[0020] 1. It has the advantage of ensuring uniform and normal sample rotation within the glass sample container:

[0021] By replacing the original stainless steel magnetic cup with a magnetic rotating cup holder, the weight is reduced; and by adopting a point contact method between the magnetic rotating cup holder and the bottom of the metal bullet body, frictional resistance is reduced, ensuring that the glass sample container rotates normally and has the advantage of uniform and normal sample rotation within the glass sample container.

[0022] 2. It has the advantage of improving the accuracy of test results:

[0023] Due to the advantages mentioned above, the sample in the glass sample container rotates at a uniform speed and normally, meeting the basic conditions for the test and improving the accuracy of the test results.

[0024] 3. It has the advantages of improving the success rate and efficiency of experiments:

[0025] Because of the advantages mentioned above, the problem of uneven rotation of the sample in the glass sample container and occasional pauses has been solved, ensuring the basic requirements of the test and improving the success rate and efficiency of the test.

[0026] 4. It has the advantage of extending the service life of glass sample containers:

[0027] By replacing the original stainless steel magnetic cup with a magnetic rotating cup holder, the outer surface of the glass sample container no longer experiences friction with the inner surface of the magnetic cup, thus extending the service life of the glass sample container.

[0028] 5. It has the advantage of high cost performance:

[0029] Because this device replaces the original magnetic cup with a magnetic rotating cup holder, the overall material consumption is reduced, and the procurement, processing, assembly and maintenance of parts are convenient, giving it a high cost-performance advantage. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0031] Figure 2 This is a schematic diagram of the magnetic rotating cup holder in this utility model.

[0032] Figure 3 This is a schematic diagram of the structure of the magnetic base in this utility model. Detailed Implementation

[0033] The present invention will now be described in further detail with reference to the accompanying drawings.

[0034] like Figure 1 , Figure 2 and Figure 3 As shown, a sample rotation device for a method B of a lubricating oil oxidation stability tester includes a metal bath 3, a metal projectile 2 installed inside the metal bath 3, and a flat cover 1. A magnetic rotating cup holder 5 is provided at the bottom of the metal projectile 2. The magnetic rotating cup holder 5 includes a magnetic base 9, on which a fixing piece 8 for fixing a glass sample container 4 is provided. The magnetic base 9 also has a magnetic groove, in which a magnet 12 is installed, and a magnetic groove cover 11 is provided. A screw 10 is provided at the bottom of the magnetic rotating cup holder 5. The screw 10 is the contact point and support point between the bottom of the magnetic base 9 and the bottom of the metal projectile 2, and its function is to make the bottom of the magnetic base 9 and the bottom of the metal projectile 2 a point contact structure. A magnet 6 is provided at the bottom of the metal bath 3, and the magnet 6 is connected to a motor 7 through a rotating shaft.

[0035] The main structure of this utility model is as follows: Figure 1 As shown. Figure 1 middle:

[0036] Flat lid 1, the lid of glass sample container 4. After the sample, water and copper catalyst coil are placed into glass sample container 4, the flat lid is used to cover the mouth of glass sample container 4.

[0037] The metal projectile 2 is made of stainless steel. A glass sample container 4 is placed on a magnetic rotating cup holder 5 and then placed inside the metal projectile. During the test, the metal projectile needs to be filled with oxygen and placed in a metal bath 3.

[0038] Metal bath 3 is a metal test bath with heating and temperature control according to this invention. A metal projectile 2 is placed in this metal bath for testing. During the test, the metal bath needs to be heated, its temperature controlled, and its temperature measured.

[0039] The glass sample container 4 contains the sample, water, and copper catalyst coil. During the test, this glass sample container is placed on the magnetically rotating cup holder 5.

[0040] A magnetic rotating cup holder 5 is a magnetic cup holder for placing and fixing a glass sample container 4. This magnetic rotating cup holder allows the glass sample container 4 to be accurately positioned at the center of the metal projectile 2, and the outer ring of the glass sample container 4 is equidistant from the inner ring of the metal projectile 2, preventing contact or friction. Its structure is described in [details omitted]. Figure 2 As shown.

[0041] Magnet 6 has a magnetic base body with a rotating shaft at its lower end. The rotating shaft of this magnet is connected to the rotating shaft of motor 7.

[0042] Motor 7 is a sample rotation motor. Its rotation shaft is connected to the rotation shaft of magnet 6. When the motor is working, the rotation shaft of the motor drives magnet 6 to rotate, and the rotation of magnet 6 drives the magnetic rotating cup holder 5 inside the metal ball 2 to rotate, which in turn drives the glass sample container 4, which is placed and fixed in the magnetic rotating cup holder 5, to rotate synchronously inside the metal ball 2, and finally causes the sample placed in the glass sample container 4 to rotate.

[0043] The magnetic rotating cup holder structure of this utility model is as follows: Figure 2 As shown. Figure 2 middle:

[0044] Fixing plates 8, two in total, are stainless steel plates with a rotating shaft and a spring. They are installed on both sides of the magnetic base 9 to center and fix the glass sample container 4 on the magnetic base 9.

[0045] Magnetic base 9, a disc-shaped magnetic base, equipped with fixing plates 8 for fixing and placing magnets, its structure is shown in [reference needed]. Figure 3 As shown.

[0046] Screw 10 is tightened at the center point of the bottom of the disc-shaped magnetic base 9.

[0047] The magnetic base structure of this utility model is as follows: Figure 3 As shown. Figure 3 middle:

[0048] Magnet slot cover 11, two pieces in total, are used to seal and cover the magnet 12 underneath.

[0049] 12 magnets, 2 pieces in total, installed on Figure 2 The magnetic base 9 is sealed and covered by the magnet slot cover 11.

[0050] The basic working principle of this utility model is as follows:

[0051] In this invention, the glass sample container 4 is placed on the magnetic rotating cup holder 5, and the fixing plate 8 of the magnetic base 9 fixes the glass sample container 4 and centers it on the magnetic rotating cup holder 5. When the shaft of the motor 7 rotates, it drives the magnet 6 to rotate. Due to the magnetic force, the rotation of the magnet 6 drives the magnetic rotating cup holder 5, which is placed inside the metal ball 2, to rotate. The rotation of the magnetic rotating cup holder 5 then drives the rotation of the glass sample container 4 placed on it, thereby causing the sample placed in the glass sample container 4 to be rotated synchronously.

[0052] Furthermore, this invention uses a magnetic rotating cup holder 5 instead of the original stainless steel magnetic cup. The magnetic rotating cup holder 5 is composed of a fixing plate 8, a magnetic base 9, a screw 10, a magnetic slot cover 11, and a magnet 12, significantly reducing the overall weight. The magnetic base 9, the magnetic slot cover 11, and the screw 10 are made of wear-resistant materials that are resistant to high temperatures and corrosion, and are lightweight, requiring less driving magnetic force. The magnet 6 and the magnet 12 are made of corrosion-resistant, high-temperature resistant, and strong magnets, ensuring a strong driving magnetic force. The screw 10 installed at the bottom of the magnetic rotating cup holder 5 ensures point contact between the magnetic rotating cup holder 5 and the inner bottom of the metal ball 2 during rotation, greatly reducing the friction between them.

[0053] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A sample rotation device for method B of a lubricating oil oxidation stability tester, characterized in that: It includes a metal bath, inside which a metal projectile is installed and a flat cover is provided. A magnetic rotating cup holder is provided at the bottom of the metal projectile. A magnet is provided at the bottom of the metal bath and the magnet is connected to a motor through a rotating shaft.

2. The sample rotation device of the lubricating oil oxidation stability tester B method according to claim 1, characterized in that: The magnetic rotating cup holder includes a magnetic base with a fixing plate for fixing the glass sample container. The bottom of the magnetic rotating cup holder is provided with a screw, which is the contact point and support point between the bottom of the magnetic base and the bottom of the metal bullet body.

3. The sample rotation device of the lubricating oil oxidation stability tester B method according to claim 1, characterized in that: The magnetic base is equipped with a magnet slot, a magnet is installed in the magnet slot, and a magnet slot cover is provided.

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