Method and system for determining components of low temperature oil seal compound

Abstract

The present application relates to the technical field of oil seals, and in particular to a method and system for determining the components of a low-temperature oil seal compound, including: determining the low-temperature environmental parameters used by the low-temperature oil seal and the expected physical performance parameters of the low-temperature oil seal; correcting the low-temperature environmental parameters used by the low-temperature oil seal according to the working medium parameters used by the low-temperature oil seal and the rotation speed of the rotating shaft adapted by the low-temperature oil seal; inputting the corrected low-temperature environmental parameters used by the low-temperature oil seal and the expected physical performance parameters of the low-temperature oil seal into a pre-trained neural network model for determining the components of the oil seal compound for prediction; preparing the corresponding low-temperature oil seal compound according to the obtained components of the low-temperature oil seal compound, and obtaining the low-temperature oil seal by compression molding. The present application can improve the sealing effect of oil seals used in low-temperature environments, and simplify the method for determining the components of the low-temperature oil seal compound, reducing the reliance on experience in determining the components of the low-temperature oil seal compound.

Description

Technical Field

[0001] The present application relates to the technical field of oil seals, and in particular to a method and system for determining components of a low-temperature oil seal rubber material. Background Art

[0002] Oil seal is a common name for general seals, which simply means the seal of lubricating oil. It is a mechanical component used to seal grease (oil is the most common liquid substance in the transmission system, and also refers to general liquid substances). It isolates the parts that need lubrication from the output parts in the transmission parts to prevent the lubricating oil from leaking. The seals used for static seals and dynamic seals (generally reciprocating motion) are called oil seals.

[0003] At present, oil seals are often used at room temperature. If oil seals suitable for room temperature are used at low temperature, the sealing effect of the oil seals will be seriously affected due to the low working environment temperature. Therefore, when determining the composition of the oil seal compound, it is necessary to preliminarily select various raw materials and the proportion of various raw materials based on experience according to the low temperature environment in which the oil seal is to work, and then test the oil seal after it is produced, and continuously adjust the types of raw materials and the proportion of various raw materials based on the test results, so as to obtain the low-temperature oil seal compound components suitable for the low-temperature environment.

[0004] However, since the raw materials of low-temperature oil seals and the proportions of various raw materials are determined by experience in the prior art, and the raw materials of low-temperature oil seals and the proportions of various raw materials are adjusted through continuous experiments, the method of determining a low-temperature oil seal rubber component in the prior art is relatively cumbersome and difficult, and is highly dependent on experience.

[0005] Therefore, how to improve the sealing effect of oil seals used in low-temperature environments, simplify the method for determining the low-temperature oil seal rubber components, and reduce the degree of dependence on experience in determining the low-temperature oil seal rubber components is a technical problem that technical personnel in this field urgently need to solve. Summary of the invention

[0006] The present application provides a method and system for determining the composition of a low-temperature oil seal compound to ensure the sealing effect of the low-temperature oil seal in a low-temperature environment, and simplifies the method for determining the composition of the low-temperature oil seal compound and reduces the reliance on experience in determining the composition of the low-temperature oil seal compound.

[0007] In order to solve the above technical problems, this application provides the following technical solutions:

[0008] A method for determining the components of a low-temperature oil seal compound comprises the following steps: step S110, determining the low-temperature environment parameters used by the low-temperature oil seal and the expected physical performance parameters of the low-temperature oil seal; step S120, correcting the low-temperature environment parameters used by the low-temperature oil seal according to the working medium parameters used by the low-temperature oil seal and the rotation speed of the rotating shaft adapted by the low-temperature oil seal; step S130, inputting the corrected low-temperature environment parameters used by the low-temperature oil seal and the expected physical performance parameters of the low-temperature oil seal into a pre-trained oil seal compound component determination neural network model for prediction; step S140, preparing the corresponding low-temperature oil seal compound according to the obtained components of the low-temperature oil seal compound, and obtaining the low-temperature oil seal by compression molding.

[0009] The method for determining the composition of the low-temperature oil seal compound as described above, wherein preferably, a first relative influence gap between the working medium parameters used by the low-temperature oil seal and the low-temperature environment parameters used by the low-temperature oil seal is calculated; a second relative influence gap between the rotation speed of the rotating shaft adapted by the low-temperature oil seal and the low-temperature environment parameters used by the low-temperature oil seal is calculated; and the low-temperature environment parameters used by the low-temperature oil seal are corrected by the first relative influence gap and the second relative influence gap to obtain the corrected low-temperature environment parameters used by the low-temperature oil seal.

[0010] The method for determining the components of low-temperature oil seal rubber material as described above, wherein preferably, the construction and training of the neural network model for determining the components of the oil seal rubber material comprises the following steps: step S131, pre-collecting the component parameters of the oil seal rubber material, the low-temperature environment parameters for the use of the oil seal, and the actual physical performance parameters of the oil seal; step S132, training the constructed neural network model for determining the components of the oil seal rubber material based on the collected component parameters of the oil seal rubber material, the low-temperature environment parameters for the use of the oil seal, and the actual physical performance parameters of the oil seal, so as to obtain a pre-trained neural network model for determining the components of the oil seal rubber material.

[0011] The method for determining the components of the low-temperature oil seal compound as described above, wherein preferably, a low-temperature oil seal compound is prepared according to the components of the obtained low-temperature oil seal compound; a low-temperature oil seal strip is prepared from the prepared low-temperature oil seal compound; the low-temperature oil seal strip and a steel frame are placed in a mold, vulcanized and molded at a specified temperature, pressure and time, and then demolded to obtain a low-temperature oil seal.

[0012] In the method for determining the composition of the low-temperature oil seal compound as described above, it is preferred that a physical test is performed on the low-temperature oil seal and physical test parameters are collected; a comprehensive evaluation index of the low-temperature oil seal is obtained based on the collected physical test parameters; and whether the quality of the low-temperature oil seal meets the design requirements is judged based on the comprehensive evaluation index of the low-temperature oil seal.

[0013] A system for determining the components of a low-temperature oil seal compound, wherein preferably, the system comprises: a parameter determination module, a parameter correction module, a parameter input module, a neural network model for determining the components of the oil seal compound, and a preparation module; the parameter determination module determines the low-temperature environment parameters used by the low-temperature oil seal and the expected physical performance parameters of the low-temperature oil seal; the parameter correction module corrects the low-temperature environment parameters used by the low-temperature oil seal according to the working medium parameters used by the low-temperature oil seal and the rotation speed of the rotating shaft adapted to the low-temperature oil seal; the parameter input module inputs the corrected low-temperature environment parameters used by the low-temperature oil seal and the expected physical performance parameters of the low-temperature oil seal into a pre-trained neural network model for determining the components of the oil seal compound for prediction; the preparation module prepares the corresponding low-temperature oil seal compound according to the components of the obtained low-temperature oil seal compound, and obtains the low-temperature oil seal by compression molding.

[0014] The system for determining the composition of the low-temperature oil seal rubber compound as described above, wherein preferably, a first relative influence gap between the working medium parameters used by the low-temperature oil seal and the low-temperature environment parameters used by the low-temperature oil seal is calculated; a second relative influence gap between the rotation speed of the rotating shaft adapted by the low-temperature oil seal and the low-temperature environment parameters used by the low-temperature oil seal is calculated; and the low-temperature environment parameters used by the low-temperature oil seal are corrected by the first relative influence gap and the second relative influence gap to obtain the corrected low-temperature environment parameters used by the low-temperature oil seal.

[0015] The system for determining the components of low-temperature oil seal rubber materials as described above, preferably, further comprises: a model construction training module; the model construction training module pre-collects component parameters of the oil seal rubber materials, parameters of the low-temperature environment in which the oil seal is used, and actual physical performance parameters of the oil seal; the model construction training module trains the constructed neural network model for determining the components of the oil seal rubber materials based on the collected component parameters of the oil seal rubber materials, parameters of the low-temperature environment in which the oil seal is used, and actual physical performance parameters of the oil seal, so as to obtain a pre-trained neural network model for determining the components of the oil seal rubber materials.

[0016] The system for determining the components of the low-temperature oil seal compound as described above, wherein preferably, the low-temperature oil seal compound is prepared according to the components of the obtained low-temperature oil seal compound; the prepared low-temperature oil seal compound is used to prepare a low-temperature oil seal strip; the low-temperature oil seal strip and a steel frame are placed in a mold, and after vulcanization molding at a specified temperature, pressure, and time, the mold is demolded to obtain a low-temperature oil seal.

[0017] In the system for determining the composition of the low-temperature oil seal compound as described above, preferably, a physical test is performed on the low-temperature oil seal, and physical test parameters are collected; a comprehensive evaluation index of the low-temperature oil seal is obtained based on the collected physical test parameters; and whether the quality of the low-temperature oil seal meets the design requirements is judged based on the comprehensive evaluation index of the low-temperature oil seal.

[0018] A low-temperature oil seal, whose rubber material weight components are: 100 parts of nitrile rubber, 7 parts of zinc oxide, 1.5 parts of stearic acid, 1 part of antioxidant (RD), 1 part of antioxidant (MB), 1 part of antioxidant (4010NA), 1.5 parts of release agent, 25 parts of dioctyl sebaceate, 80 parts of carbon black (N550), 25 parts of carbon black (spray), 10 parts of liquid nitrile, 0.3 parts of vulcanizing agent (MC-2), 0.2 parts of accelerator (TMTD), 1.5 parts of accelerator (CZ), and 2.5 parts of vulcanizing agent (DCP).

[0019] Compared with the above background technology, since the present application determines the raw materials of low-temperature oil seals and the proportions of various raw materials through the neural network model of oil seal rubber components, it avoids relying on experience to continuously test and adjust the raw materials of low-temperature oil seals and the proportions of various raw materials, thereby making the method of determining the components of low-temperature oil seal rubber simple and reducing the degree of dependence on experience in determining the components of low-temperature oil seal rubber. In addition, the components of low-temperature oil seal rubber can be simply determined for different temperatures, avoiding the use of low-temperature oil seals with one component in a relatively wide temperature range, and improving the life of oil seals used in low-temperature environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0021] Figure 1 It is a flow chart of a method for determining components of a low-temperature oil seal compound provided in an embodiment of the present application;

[0022] Figure 2 It is a flow chart for constructing and training a neural network model for determining oil seal compound components provided in an embodiment of the present application;

[0023] Figure 3 is a schematic diagram of a low-temperature oil seal compound component provided in an embodiment of the present application;

[0024] Figure 4 It is a schematic diagram of a system for determining components of a low-temperature oil seal compound provided in an embodiment of the present application. DETAILED DESCRIPTION

[0025] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be interpreted as limiting the present invention.

[0026] Embodiment 1

[0027] See also Figure 1 , Figure 1 It is a flow chart of a method for determining components of a low-temperature oil seal compound provided in an embodiment of the present application.

[0028] The present application provides a method for determining the components of a low-temperature oil seal compound, comprising the following steps:

[0029] Step S110, determining the low temperature environment parameters used by the low temperature oil seal and the expected physical performance parameters of the low temperature oil seal;

[0030] Among them, the sealing effect of the low-temperature oil seal is mainly reflected in the actual physical performance parameters of the low-temperature oil seal, such as: low-temperature brittleness, hardness, tensile strength, elongation at break, compression permanent deformation rate, density, etc. In addition, the sealing effect of the low-temperature oil seal is also mainly related to the low-temperature environmental parameters (i.e., ambient temperature) used by the low-temperature oil seal. Therefore, in order to determine the low-temperature oil seal rubber component that can achieve the expected sealing effect, it is mainly necessary to consider the low-temperature environmental parameters used by the low-temperature oil seal and the influence of the expected physical performance parameters of the low-temperature oil seal on the low-temperature oil seal rubber component.

[0031] Based on this, when determining the composition of the low-temperature oil seal compound, it is first necessary to determine the expected physical performance parameters of the low-temperature oil seal according to the use requirements K = {k 1 , k 2 , …, k (θ-1) , k θ}, where k 1 is the first expected physical performance parameter, k 2 is the expected second physical performance parameter, k (θ-1) is the expected θ-1th physical property parameter, k θ is the expected θth physical performance parameter, for example: k 1 is the expected low temperature brittleness, k 2 is the expected hardness, k (θ-1) is the expected tensile strength, k θ is the expected elongation at break. In addition, the low temperature environment parameter T used by the low temperature oil seal needs to be determined according to the use requirements.

[0032] Step S120, correcting the low-temperature environment parameters used by the low-temperature oil seal according to the working medium parameters used by the low-temperature oil seal and the rotation speed of the rotating shaft adapted by the low-temperature oil seal;

[0033] Since many low-temperature oil seal failures are caused by high temperatures caused by frictional heat generated by the lips of the low-temperature oil seal, the lips of the low-temperature oil seal and the rotating shaft (the rotating shaft is inserted into the inner ring of the bearing, and the low-temperature oil seal is stuck between the inner ring and the outer ring of the bearing at the end of the bearing to seal the lubricating oil in the bearing) are in contact with each other to generate friction, and the consumed mechanical energy is converted into heat energy and accumulated at the contact part, causing the temperature of the lips of the low-temperature oil seal to rise, accelerating the aging of the lips of the low-temperature oil seal. The working medium (lubricating oil) between the lips of the low-temperature oil seal and the gap between the rotating shaft dissipates the heat energy accumulated here, and the viscosity of the working medium (lubricating oil) directly affects the heat dissipation effect. Therefore, the working medium parameters used by the low-temperature oil seal and the rotation speed of the rotating shaft adapted to the low-temperature oil seal have a certain influence on the failure of the low-temperature oil seal, and the failure of the low-temperature oil seal will inevitably have a certain impact on the actual sealing effect of the low-temperature oil seal.

[0034] That is, in addition to the low-temperature environmental parameters used by the low-temperature oil seal, which have a relatively major influence on the actual sealing effect of the low-temperature oil seal, the working medium parameters used by the low-temperature oil seal (i.e., the viscosity of the lubricating oil sealed by the low-temperature oil seal) and the rotational speed of the rotating shaft adapted to the low-temperature oil seal also have a certain influence on the actual sealing effect of the low-temperature oil seal. Therefore, when determining the components of the low-temperature oil seal rubber material that can achieve the expected sealing effect parameters, in addition to the low-temperature environmental parameters used by the low-temperature oil seal, it is also necessary to refer to the influence of the working medium parameters used by the low-temperature oil seal and the rotational speed of the rotating shaft adapted to the low-temperature oil seal on the components of the low-temperature oil seal.

[0035] Therefore, when determining the components of the low-temperature oil seal compound, it is also necessary to determine the working medium parameter A used by the low-temperature oil seal according to the use requirements. T , the speed of the rotating shaft that the low temperature oil seal is suitable for B T Since more factors will increase the complexity of the method for determining the low-temperature oil seal compound components, in order to reduce the complexity of the method for determining the low-temperature oil seal compound components, all temperature-related parameters are integrated into a total parameter for consideration.

[0036] Based on this, according to the working medium parameter A used by the warm oil seal T , the speed of the rotating shaft that the low temperature oil seal is suitable for B T The low temperature environment parameter T used by the low temperature oil seal is corrected to obtain a total parameter, thereby not only considering multiple factors when determining the low temperature oil seal rubber component, but also reducing the complexity of determining the low temperature oil seal rubber component.

[0037] Specifically, calculate the working medium parameter A used by the low temperature oil seal T The relative impact difference between the low temperature environment parameter T used by the low temperature oil seal Among them, d(|A T|,|T|) is |A T The difference between | and |T|, |A T | is the working medium parameter A used by low temperature oil seal T |T| is the normalized value of the low-temperature environment parameter T used by the low-temperature oil seal.

[0038] Calculate the rotation speed B of the rotating shaft that the low temperature oil seal is suitable for T The relative impact difference between the low temperature environment parameter T used by the low temperature oil seal Among them, d(|B T |, |T|) is |B T The difference between | and |T|, |B T | is the rotation speed B of the rotating shaft that the low temperature oil seal is adapted to T |T| is the normalized value of the low-temperature environment parameter T used by the low-temperature oil seal.

[0039] By formula The corrected low-temperature environment parameter T' used by the low-temperature oil seal is calculated, where α is the working medium parameter A used by the low-temperature oil seal. T The correction weight of the low temperature environment parameter T used by the low temperature oil seal, β is the speed B of the rotating shaft adapted by the low temperature oil seal T Correction weight for the low temperature environment parameter T used by low temperature oil seals.

[0040] Step S130, inputting the corrected low-temperature environment parameters used by the low-temperature oil seal and the expected physical performance parameters of the low-temperature oil seal into a pre-trained oil seal rubber component determination neural network model for prediction;

[0041] Among them, the neural network model for determining the oil seal compound composition is pre-built and trained, please refer to Figure 2 , Figure 2 It is a flow chart for constructing and training a neural network model for determining oil seal compound components provided in an embodiment of the present application.

[0042] Specifically, the method for constructing and training a neural network model for determining the components of an oil seal compound includes the following steps:

[0043] Step S131, pre-collecting the component parameters of the oil seal rubber material, the low temperature environment parameters of the oil seal, and the actual physical performance parameters of the oil seal;

[0044] Common materials for oil seal rubber include: nitrile rubber, fluororubber, silicone rubber, acrylic rubber, polyurethane, polytetrafluoroethylene, etc. However, different materials and different components have different effects on the actual physical properties of the oil seal, and different low-temperature environment parameters also have different effects on the actual physical properties of the oil seal. Therefore, in this application, the component parameters of the oil seal, the low-temperature environment parameters of the oil seal, and the actual physical performance parameters of the oil seal are collected, so as to construct and train a neural network model for determining the components of the oil seal rubber based on the collected component parameters of the oil seal, the low-temperature environment parameters of the oil seal, and the actual physical performance parameters of the oil seal.

[0045] Specifically, the characteristic vector set M={(T 1 , Y 1 , K′ 1 ),…,(T i , Y j , K′ ij ),…,(T n , Y m , K′ nm )}, where T 1 is the first low temperature environment parameter, Y 1 is the first group component parameter, K′ 1 is the actual physical performance parameter of the oil seal of the first group of component parameters under the first low temperature environment parameter, T i is the i-th low temperature environment parameter, Y j is the parameter of the jth group, K′ ij is the actual physical performance parameter of the oil seal with the jth group of component parameters under the i-th low temperature environment parameters, T n is the nth low temperature environment parameter, Y m is the parameter of the mth group, K′ nm is the actual physical performance parameter of the oil seal with the mth group of component parameters under the nth low temperature environment parameters. On this basis, Y j ={a j1 、a j2 , …, a j(v-1) 、a jv}, where a j1 is the first component parameter in the jth group of component parameters, a j2 is the second component parameter in the jth group of component parameters, a j(v-1) is the (v-1)th component parameter in the jth group of component parameters, a jv is the vth component parameter in the jth group of component parameters, for example: a j1 is the amount of nitrile rubber in the jth group, a j2is the amount of zinc oxide in the jth group, a j(v-1) is the amount of stearic acid in the jth group, a jv is the vulcanizing agent in the jth group; K' ij ={k′ ij1 , k′ ij2 , …, k′ ij(θ-1) , k′ ijθ}, where k′ ij1 is the first actual physical performance parameter of the oil seal of the jth group of component parameters under the i-th low temperature environment parameters, k′ ij2 k′ is the second actual physical performance parameter of the oil seal with the jth group of component parameters under the i-th low temperature environment parameters. ij(θ-1) is the θ-1th actual physical performance parameter of the oil seal with the jth group of component parameters under the i-th low temperature environment parameters, k′ ijθ It is the θth actual physical performance parameter of the oil seal with the jth group of component parameters under the i-th low temperature environment parameters.

[0046] Step S132, training the constructed neural network model for determining the components of the oil seal rubber material based on the collected component parameters of the oil seal, the low temperature environment parameters of the oil seal, and the actual physical performance parameters of the oil seal, so as to obtain a pre-trained neural network model for determining the components of the oil seal rubber material;

[0047] Specifically, the neural network model for determining the oil seal compound component constructed in this application is y=W 2 ρ{W 1 μ(x 1 、x 2 )+σ 1}+σ 2 , where y is the output of the neural network model for determining the oil seal compound composition, and x 1 is the first input of the neural network model for determining the oil seal compound composition, x 2 It is the second input of the neural network model for determining the oil seal compound composition, W 1 is the weight from the input layer to the hidden layer, W 2 is the weight from the hidden layer to the output layer, β 1 is the threshold from the input layer to the hidden layer, β 2 is the threshold from the hidden layer to the output layer, μ(x) is the function from the input layer to the hidden layer, and ρ(x) is the function from the hidden layer to the output layer.

[0048] The Y in the feature vector set M j As the output y of the neural network model for determining the composition of oil seal rubber, T in the feature vector set M is i As the first input x of the neural network model for determining the oil seal compound composition 1 , K′ in the feature vector set M ijAs the second input x of the neural network model for determining the composition of oil seal rubber 2 , K′ ij ={k′ ij1 , k′ ij2 , …, k′ ij(θ-1) , k′ ijθ}, where i ranges from 1 to n, and j ranges from 1 to m. The neural network model for determining the oil seal compound components is trained to obtain W 1 , W 2 , σ 1 , σ 2 ,as well as e is a natural constant, and d is a constant (b=0.95).

[0049] After training the oil seal compound component to determine the neural network model, y = W 2 ρ{W 1 μ(x 1 、x 2 )+σ 1}+σ 2 The low temperature environment parameter T′ used by the modified low temperature oil seal is used as the input x of the neural network model to determine the oil seal rubber composition. 1 , the expected physical performance parameter K of the low-temperature oil seal is used as the input x of the neural network model to determine the oil seal compound composition 2 , input into the trained oil seal rubber component determination neural network, and use the corresponding output as the component parameter of the low-temperature oil seal.

[0050] Step S140, preparing a corresponding low-temperature oil seal compound according to the components of the obtained low-temperature oil seal compound, and obtaining a low-temperature oil seal by compression molding;

[0051] After obtaining the components of the low-temperature oil seal compound, the low-temperature oil seal compound is mixed according to the components, and then the low-temperature oil seal compound is prepared into a low-temperature oil seal strip, and then the low-temperature oil seal strip and the steel frame are placed in the mold as required, and then the mold carrying the low-temperature oil seal strip and the steel frame is placed in a vulcanization device (for example: a hot pressing molding machine), and vulcanized and molded under the specified temperature, pressure and time. Finally, the mold is opened to take out the molded low-temperature oil seal.

[0052] As an example, Figure 3As shown, the components of the low-temperature oil seal rubber are: 100 parts of nitrile rubber (JSR250S), 7 parts of zinc oxide (ZnO), 1.5 parts of stearic acid (SA), 1 part of antioxidant (RD), 1 part of antioxidant (MB), 1 part of antioxidant (4010NA), 1.5 parts of mold release agent (Modeli), 25 parts of dioctyl sebaceous acid (DOS), 80 parts of carbon black (N550), 25 parts of carbon black (spray), 10 parts of liquid nitrile (LNBR), 0.3 parts of vulcanizing agent (MC-2), 0.2 parts of accelerator (TMTD), 1.5 parts of accelerator (CZ), and 2.5 parts of vulcanizing agent (DCP).

[0053] After the low-temperature oil seal is manufactured, a physical test is performed on the low-temperature oil seal, and physical test parameters are collected. A comprehensive evaluation index of the low-temperature oil seal is obtained based on the collected physical test parameters to reflect whether the quality of the low-temperature oil seal meets the design requirements.

[0054] Specifically, the low-temperature oil seal is subjected to hardness test, tensile strength test, elongation at break test, compression set test, density test, hot air aging test, grease resistance test, etc. According to the formula The comprehensive evaluation index R of low temperature oil seal is calculated, where C h is the hth physical test parameter, c h is the influence weight of the hth physical test parameter on the comprehensive evaluation index R, and H is the number of physical test parameters. h Parameters for hot air aging test.

[0055] If the comprehensive evaluation index R of the low temperature oil seal is within the predetermined range, the quality of the low temperature oil seal meets the design requirements; if the comprehensive evaluation index R of the low temperature oil seal is not within the predetermined range, the quality of the low temperature oil seal does not meet the design requirements.

[0056] Embodiment 2

[0057] See also Figure 4 , Figure 4 It is a schematic diagram of a system for determining components of a low-temperature oil seal compound provided in an embodiment of the present application.

[0058] The present application provides a system 400 for determining components of a low-temperature oil seal compound, including: a parameter determination module 410, a parameter correction module 420, a parameter input module 430, an oil seal compound component determination neural network model 440 and a preparation module 460.

[0059] The parameter determination module 410 determines the low temperature environment parameters used by the low temperature oil seal and the expected physical performance parameters of the low temperature oil seal.

[0060] Among them, the sealing effect of the low-temperature oil seal is mainly reflected in the actual physical performance parameters of the low-temperature oil seal, such as: low-temperature brittleness, hardness, tensile strength, elongation at break, compression permanent deformation rate, density, etc. In addition, the sealing effect of the low-temperature oil seal is also mainly related to the low-temperature environmental parameters (i.e., ambient temperature) used by the low-temperature oil seal. Therefore, in order to determine the low-temperature oil seal rubber component that can achieve the expected sealing effect parameters, it is mainly necessary to consider the low-temperature environmental parameters used by the low-temperature oil seal and the influence of the expected physical performance parameters of the low-temperature oil seal on the low-temperature oil seal rubber component.

[0061] Based on this, when determining the composition of the low-temperature oil seal compound, it is first necessary to determine the expected physical performance parameters of the low-temperature oil seal according to the use requirements K = {k 1 , k 2 , …, k (θ-1) , k θ}, where k 1 is the first expected physical performance parameter, k 2 is the expected second physical performance parameter, k (θ-1) is the expected θ-1th physical property parameter, k θ is the expected θth physical performance parameter, for example: k 1 is the expected low temperature brittleness, k 2 is the expected hardness, k (θ-1) is the expected tensile strength, k θ is the expected elongation at break. In addition, the low temperature environment parameter T used by the low temperature oil seal needs to be determined according to the use requirements.

[0062] The parameter correction module 420 corrects the low-temperature environment parameters used by the low-temperature oil seal according to the working medium parameters used by the low-temperature oil seal and the rotation speed of the rotating shaft adapted by the low-temperature oil seal.

[0063] Since many low-temperature oil seal failures are caused by high temperatures caused by frictional heat generated by the lips of the low-temperature oil seal, the lips of the low-temperature oil seal and the rotating shaft (the rotating shaft is inserted into the inner ring of the bearing, and the low-temperature oil seal is stuck between the inner ring and the outer ring of the bearing at the end of the bearing to seal the lubricating oil in the bearing) are in contact with each other to generate friction, and the consumed mechanical energy is converted into heat energy and accumulated at the contact part, causing the temperature of the lips of the low-temperature oil seal to rise, accelerating the aging of the lips of the low-temperature oil seal. The working medium (lubricating oil) between the lips of the low-temperature oil seal and the gap between the rotating shaft dissipates the heat energy accumulated here, and the viscosity of the working medium (lubricating oil) directly affects the heat dissipation effect. Therefore, the working medium parameters used by the low-temperature oil seal and the rotation speed of the rotating shaft adapted to the low-temperature oil seal have a certain influence on the failure of the low-temperature oil seal, and the failure of the low-temperature oil seal will inevitably have a certain impact on the actual sealing effect of the low-temperature oil seal.

[0064] That is, in addition to the low-temperature environmental parameters used by the low-temperature oil seal, which have a relatively major influence on the actual sealing effect of the low-temperature oil seal, the working medium parameters used by the low-temperature oil seal (i.e., the viscosity of the lubricating oil sealed by the low-temperature oil seal) and the rotational speed of the rotating shaft adapted to the low-temperature oil seal also have a certain influence on the actual sealing effect of the low-temperature oil seal. Therefore, when determining the components of the low-temperature oil seal rubber material that can achieve the expected sealing effect parameters, in addition to the low-temperature environmental parameters used by the low-temperature oil seal, it is also necessary to refer to the influence of the working medium parameters used by the low-temperature oil seal and the rotational speed of the rotating shaft adapted to the low-temperature oil seal on the components of the low-temperature oil seal.

[0065] Therefore, when determining the components of the low-temperature oil seal compound, it is also necessary to determine the working medium parameter A used by the low-temperature oil seal according to the use requirements. T , the speed of the rotating shaft that the low temperature oil seal is suitable for B T Since more factors will increase the complexity of the method for determining the low-temperature oil seal compound components, in order to reduce the complexity of the method for determining the low-temperature oil seal compound components, all temperature-related parameters are integrated into a total parameter for consideration.

[0066] Based on this, according to the working medium parameter A used by the warm oil seal T , the speed of the rotating shaft that the low temperature oil seal is suitable for B T The low temperature environment parameter T used by the low temperature oil seal is corrected to obtain a total parameter, thereby not only considering multiple factors when determining the low temperature oil seal rubber component, but also reducing the complexity of determining the low temperature oil seal rubber component.

[0067] Specifically, calculate the working medium parameter A used by the low temperature oil seal T The relative impact difference between the low temperature environment parameter T used by the low temperature oil seal Among them, d(|A T |,|T|) is |A T The difference between | and |T|, |A T | is the working medium parameter A used by low temperature oil seal T |T| is the normalized value of the low-temperature environment parameter T used by the low-temperature oil seal.

[0068] Calculate the rotation speed B of the rotating shaft that the low temperature oil seal is suitable for T The relative impact difference between the low temperature environment parameter T used by the low temperature oil seal Among them, d(|B T |, |T|) is |B T The difference between | and |T|, |B T | is the rotation speed B of the rotating shaft that the low temperature oil seal is adapted to T|T| is the normalized value of the low-temperature environment parameter T used by the low-temperature oil seal.

[0069] By formula The corrected low-temperature environment parameter T' used by the low-temperature oil seal is calculated, where α is the working medium parameter A used by the low-temperature oil seal. T The correction weight of the low temperature environment parameter T used by the low temperature oil seal, β is the speed B of the rotating shaft adapted by the low temperature oil seal T Correction weight for the low temperature environment parameter T used by low temperature oil seals.

[0070] The parameter input module 430 inputs the corrected low-temperature environment parameters used by the low-temperature oil seal and the expected physical performance parameters of the low-temperature oil seal into the pre-trained oil seal rubber component determination neural network model 440 for prediction.

[0071] The oil seal compound component determination neural network model is pre-built and trained. Specifically, the low-temperature oil seal compound component determination system further includes: a model building training module 450 .

[0072] The model building training module 450 collects in advance the component parameters of the oil seal rubber compound, the low temperature environment parameters of the oil seal, and the actual physical performance parameters of the oil seal.

[0073] Common materials for oil seal rubber include: nitrile rubber, fluororubber, silicone rubber, acrylic rubber, polyurethane, polytetrafluoroethylene, etc. However, different materials and different components have different effects on the actual physical properties of the oil seal, and different low-temperature environment parameters also have different effects on the actual physical properties of the oil seal. Therefore, in this application, the component parameters of the oil seal, the low-temperature environment parameters of the oil seal, and the actual physical performance parameters of the oil seal are collected, so as to construct and train a neural network model for determining the components of the oil seal rubber based on the collected component parameters of the oil seal, the low-temperature environment parameters of the oil seal, and the actual physical performance parameters of the oil seal.

[0074] Specifically, the characteristic vector set M={(T 1 , Y 1 , K′ 1 ),…,(T i , Y j , K′ ij ),…,(T n , Y m , K′ nm )}, where T 1 is the first low temperature environment parameter, Y 1 is the first group component parameter, K′1 is the actual physical performance parameter of the oil seal of the first group of component parameters under the first low temperature environment parameter, T i is the i-th low temperature environment parameter, Y j is the parameter of the jth group, K′ ij is the actual physical performance parameter of the oil seal with the jth group of component parameters under the i-th low temperature environment parameters, T n is the nth low temperature environment parameter, Y m is the parameter of the mth group, K′ nm is the actual physical performance parameter of the oil seal with the mth group of component parameters under the nth low temperature environment parameters. On this basis, Y j ={a j1 、a j2 , …, a j(v-1) 、a jv}, where a j1 is the first component parameter in the jth group of component parameters, a j2 is the second component parameter in the jth group of component parameters, a j(v-1) is the (v-1)th component parameter in the jth group of component parameters, a jv is the vth component parameter in the jth group of component parameters, for example: a j1 is the amount of nitrile rubber in the jth group, a j2 is the amount of zinc oxide in the jth group, a j(v-1) is the amount of stearic acid in the jth group, a jv is the vulcanizing agent in the jth group; K' ij ={k′ ij1 , k′ ij2 , …, k′ ij(θ-1) , k′ ijθ}, where k′ ij1 is the first actual physical performance parameter of the oil seal of the jth group of component parameters under the i-th low temperature environment parameters, k′ ij2 k′ is the second actual physical performance parameter of the oil seal with the jth group of component parameters under the i-th low temperature environment parameters. ij(θ-1) is the θ-1th actual physical performance parameter of the oil seal with the jth group of component parameters under the i-th low temperature environment parameters, k′ ijθ It is the θth actual physical performance parameter of the oil seal with the jth group of component parameters under the i-th low temperature environment parameters.

[0075] The model building training module 450 trains the constructed oil seal rubber component determination neural network model based on the collected oil seal rubber component parameters, the oil seal's low temperature environment parameters, and the oil seal's actual physical performance parameters to obtain a pre-trained oil seal component determination neural network model 440.

[0076] Specifically, the neural network model for determining the oil seal compound component constructed in this application is y=W 2 ρ{W 1 μ(x 1 、x 2 )+σ 1}+σ 2 , where y is the output of the neural network model for determining the oil seal compound composition, and x 1 is the first input of the neural network model for determining the oil seal compound composition, x 2 It is the second input of the neural network model for determining the oil seal compound composition, W 1 is the weight from the input layer to the hidden layer, W 2 is the weight from the hidden layer to the output layer, β 1 is the threshold from the input layer to the hidden layer, β 2 is the threshold from the hidden layer to the output layer, μ(x) is the function from the input layer to the hidden layer, and ρ(x) is the function from the hidden layer to the output layer.

[0077] The Y in the feature vector set M j As the output y of the neural network model for determining the composition of oil seal rubber, T in the feature vector set M is i As the first input x of the neural network model for determining the oil seal compound composition 1 , K′ in the feature vector set M ij As the second input x of the neural network model for determining the composition of oil seal rubber 2 , K′ ij ={k′ ij1 , k′ ij2 , …, k′ ij(θ-1) , k′ ijθ}, where i ranges from 1 to n, and j ranges from 1 to m. The neural network model for determining the oil seal compound components is trained to obtain W 1 , W 2 , σ 1 , σ 2 ,as well as e is a natural constant, and d is a constant (b=0.95).

[0078] After training the oil seal compound component to determine the neural network model, y = W 2 ρ{W 1 μ(x 1 、x 2 )+σ 1}+σ 2 The low temperature environment parameter T′ used by the modified low temperature oil seal is used as the input x of the neural network model to determine the oil seal rubber composition. 1 , the expected physical performance parameter K of the low-temperature oil seal is used as the input x of the neural network model to determine the oil seal compound composition2 , input into the trained oil seal rubber component determination neural network, and use the corresponding output as the component parameter of the low-temperature oil seal.

[0079] The preparation module 460 prepares corresponding low-temperature oil seal compound according to the components of the obtained low-temperature oil seal compound, and obtains a low-temperature oil seal by compression molding.

[0080] After obtaining the components of the low-temperature oil seal compound, the low-temperature oil seal compound is mixed according to the components, and then the low-temperature oil seal compound is prepared into a low-temperature oil seal strip, and then the low-temperature oil seal strip and the steel frame are placed in the mold according to the requirements, and then the mold carrying the low-temperature oil seal strip and the steel frame is placed in a vulcanization device (for example: a hot press molding machine), and vulcanized and molded under the specified temperature, pressure, and time, and finally the mold is opened to take out the molded low-temperature oil seal. .

[0081] As an example, Figure 3 As shown, the components of the low-temperature oil seal rubber are: 100 parts of nitrile rubber (JSR250S), 7 parts of zinc oxide (ZnO), 1.5 parts of stearic acid (SA), 1 part of antioxidant (RD), 1 part of antioxidant (MB), 1 part of antioxidant (4010NA), 1.5 parts of mold release agent (Modeli), 25 parts of dioctyl sebaceous acid (DOS), 80 parts of carbon black (N550), 25 parts of carbon black (spray), 10 parts of liquid nitrile (LNBR), 0.3 parts of vulcanizing agent (MC-2), 0.2 parts of accelerator (TMTD), 1.5 parts of accelerator (CZ), and 2.5 parts of vulcanizing agent (DCP).

[0082] After the low-temperature oil seal is manufactured, a physical test is performed on the low-temperature oil seal, and physical test parameters are collected. A comprehensive evaluation index of the low-temperature oil seal is obtained based on the collected physical test parameters to reflect whether the quality of the low-temperature oil seal meets the design requirements.

[0083] Specifically, the low-temperature oil seal is subjected to hardness test, tensile strength test, elongation at break test, compression set test, density test, hot air aging test, grease resistance test, etc. According to the formula The comprehensive evaluation index R of low temperature oil seal is calculated, where C h is the hth physical test parameter, c h is the influence weight of the hth physical test parameter on the comprehensive evaluation index R, and H is the number of physical test parameters. h Parameters for hot air aging test.

[0084] If the comprehensive evaluation index R of the low temperature oil seal is within the predetermined range, the quality of the low temperature oil seal meets the design requirements; if the comprehensive evaluation index R of the low temperature oil seal is not within the predetermined range, the quality of the low temperature oil seal does not meet the design requirements.

[0085] Since the present application determines the raw materials of low-temperature oil seals and the proportions of various raw materials through the neural network model of oil seal rubber component determination, it avoids relying on experience to continuously test and adjust the raw materials of low-temperature oil seals and the proportions of various raw materials, thereby making the method of determining the components of low-temperature oil seal rubber simple and reducing the degree of dependence on experience in determining the components of low-temperature oil seal rubber. In addition, the components of low-temperature oil seal rubber can be simply determined for different temperatures, avoiding the application of low-temperature oil seals with one component in a relatively wide temperature range, and improving the life of oil seals used in low-temperature environments.

[0086] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0087] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A method for determining the composition of a low-temperature oil seal compound, characterized in that: The steps include: Step S110, determining the low temperature environment parameters used by the low temperature oil seal and the expected physical performance parameters of the low temperature oil seal; Step S120, correcting the low-temperature environment parameters used by the low-temperature oil seal according to the working medium parameters used by the low-temperature oil seal and the rotation speed of the rotating shaft adapted by the low-temperature oil seal; The specific steps include: Calculate the first relative impact difference between the working medium parameters used by the low temperature oil seal and the low temperature environment parameters used by the low temperature oil seal; Calculate the second relative impact gap between the rotation speed of the rotating shaft adapted by the low-temperature oil seal and the low-temperature environment parameters used by the low-temperature oil seal; Correcting the low-temperature environment parameters used by the low-temperature oil seal by using the first relative influence difference and the second relative influence difference to obtain corrected low-temperature environment parameters used by the low-temperature oil seal; Specifically through the formula Calculate and obtain the low-temperature environmental parameter T′ used by the corrected low-temperature oil seal; Among them, α is the working medium parameter A used by the low temperature oil seal T Correction weight for low temperature environment parameter T used by low temperature oil seals; Yes A T The relative impact gap between T and d(|A T |,|T|) is |A T The difference between | and |T|; |A T | is the working medium parameter A used by low temperature oil seal T |T| is the normalized value of the low-temperature environment parameter T used by the low-temperature oil seal; β is the speed B of the rotating shaft adapted by the low-temperature oil seal T Correction weight for low temperature environment parameter T used by low temperature oil seals; It is B T The relative impact gap between T and B T |, |T|) is |B T The difference between | and |T|; |B T | is the rotation speed B of the rotating shaft that the low temperature oil seal is adapted to T is the normalized value of |T|, which is the normalized value of the low-temperature environmental parameter T used by the low-temperature oil seal; Step S130, inputting the corrected low-temperature environment parameters used by the low-temperature oil seal and the expected physical performance parameters of the low-temperature oil seal into a pre-trained oil seal rubber component determination neural network model for prediction; Step S140: preparing a corresponding low-temperature oil seal compound according to the components of the obtained low-temperature oil seal compound, and obtaining a low-temperature oil seal by compression molding.

2. The method for determining the composition of low-temperature oil seal compound according to claim 1, characterized in that: The construction and training of the neural network model for determining the components of oil seal rubber materials includes the following steps: Step S131, pre-collecting the component parameters of the oil seal rubber material, the low temperature environment parameters of the oil seal, and the actual physical performance parameters of the oil seal; Step S132: based on the collected oil seal compound component parameters, the oil seal low temperature environment parameters, and the actual physical performance parameters of the oil seal, the constructed oil seal compound component determination neural network model is trained to obtain a pre-trained oil seal compound component determination neural network model.

3. The method for determining the components of low-temperature oil seal compound according to claim 1 or 2, characterized in that: preparing a low-temperature oil seal compound according to the obtained components of the low-temperature oil seal compound; The prepared low-temperature oil seal rubber material is used to prepare a low-temperature oil seal rubber strip; The low-temperature oil seal strip and the steel frame are placed in a mold, vulcanized and molded under specified temperature, pressure and time, and then demoulded to obtain a low-temperature oil seal.

4. The method for determining the components of low-temperature oil seal compound according to claim 1 or 2, characterized in that: Conduct physical tests on low-temperature oil seals and collect physical test parameters; Obtain the comprehensive evaluation index of low-temperature oil seals based on the collected physical test parameters; Whether the quality of the low-temperature oil seal meets the design requirements is judged based on the comprehensive evaluation index of the low-temperature oil seal.

5. A system for determining the composition of low-temperature oil seal rubber, characterized in that: include: Parameter determination module, parameter correction module, parameter input module, oil seal rubber component determination neural network model and preparation module; The parameter determination module determines the low temperature environment parameters used by the low temperature oil seal and the expected physical performance parameters of the low temperature oil seal; The parameter correction module corrects the low-temperature environment parameters used by the low-temperature oil seal according to the working medium parameters used by the low-temperature oil seal and the rotation speed of the rotating shaft adapted by the low-temperature oil seal; The details include: Calculating a first relative influence difference between a working medium parameter used by the low-temperature oil seal and a low-temperature environment parameter used by the low-temperature oil seal; calculating a second relative influence difference between a rotation speed of a rotating shaft adapted by the low-temperature oil seal and a low-temperature environment parameter used by the low-temperature oil seal; correcting the low-temperature environment parameter used by the low-temperature oil seal by using the first relative influence difference and the second relative influence difference to obtain a corrected low-temperature environment parameter used by the low-temperature oil seal; Specifically through the formula Calculate and obtain the low-temperature environmental parameter T′ used by the corrected low-temperature oil seal; Among them, α is the working medium parameter A used by the low temperature oil seal T Correction weight for low temperature environment parameter T used by low temperature oil seals; Yes A T The relative impact gap between T and d(|A T |,|T|) is |A T The difference between | and |T|; |A T | is the working medium parameter A used by low temperature oil seal T |T| is the normalized value of the low-temperature environment parameter T used by the low-temperature oil seal; β is the speed B of the rotating shaft adapted by the low-temperature oil seal T Correction weight for low temperature environment parameter T used by low temperature oil seals; It is B T The relative impact gap between T and B T |, |T|) is |B T The difference between | and |T|; |B T | is the rotation speed B of the rotating shaft that the low temperature oil seal is adapted to T is the normalized value of |T|, which is the normalized value of the low-temperature environmental parameter T used by the low-temperature oil seal; The parameter input module inputs the corrected low-temperature environment parameters used by the low-temperature oil seal and the expected physical performance parameters of the low-temperature oil seal into the pre-trained oil seal rubber component determination neural network model for prediction; The preparation module prepares the corresponding low-temperature oil seal compound according to the components of the obtained low-temperature oil seal compound, and obtains the low-temperature oil seal through compression molding.

6. The system for determining the composition of low-temperature oil seal compound according to claim 5, characterized in that: in, It also includes: a model construction training module; the model construction training module pre-collects component parameters of the oil seal rubber material, low-temperature environment parameters of the oil seal, and actual physical performance parameters of the oil seal; the model construction training module trains the constructed oil seal rubber material component determination neural network model based on the collected component parameters of the oil seal rubber material, low-temperature environment parameters of the oil seal, and actual physical performance parameters of the oil seal to obtain a pre-trained oil seal rubber material component determination neural network model.

7. The system for determining the composition of low-temperature oil seal compound according to claim 5 or 6, characterized in that: preparing a low-temperature oil seal rubber compound according to the components of the obtained low-temperature oil seal rubber compound; preparing a low-temperature oil seal rubber strip from the prepared low-temperature oil seal rubber compound; The low-temperature oil seal strip and the steel frame are placed in a mold, vulcanized and molded under specified temperature, pressure and time, and then demoulded to obtain a low-temperature oil seal.

8. The system for determining the components of low-temperature oil sealant according to claim 5 or 6, characterized in that: in, Perform physical tests on the low-temperature oil seal and collect physical test parameters; obtain a comprehensive evaluation index of the low-temperature oil seal based on the collected physical test parameters; and judge whether the quality of the low-temperature oil seal meets the design requirements based on the comprehensive evaluation index of the low-temperature oil seal.

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