Supercharger bearing system evaluation method and system

Abstract

The invention discloses a method and a system for evaluating a supercharger bearing system, relates to the field of power systems, and is used for solving the problem that the reliability of the supercharger bearing system cannot be effectively evaluated by a traditional method. The method comprises the steps that the supercharger is controlled to operate according to a preset working condition sequence, the preset working condition sequence comprises at least one working condition, and the step of controlling the supercharger to operate according to any working condition comprises the substeps that the rotating speed of a turbine device and boundary conditions of at least two operation parameters of the supercharger are set according to any working condition, so that the supercharger operates according to the set rotating speed of the turbine device; at least two operation parameters of the supercharger respectively meet the corresponding boundary conditions during operation; and after operation is finished, the abrasion condition of the bearing system of the supercharger is detected, and an evaluation result of the bearing system of the supercharger is obtained. According to the invention, the test is carried out by controlling various parameters of the supercharger in the test of controlling the operation of the supercharger, the actual operation scene of the supercharger is better met, and the reliability of the supercharger bearing system can be evaluated more effectively.

Description

Technical Field

[0001] The present invention relates to the field of power systems, and in particular to a supercharger bearing system evaluation method and system. Background Art

[0002] The transportation industry, a major contributor to carbon emissions, faces unprecedented pressure and challenges. Efficient internal combustion powertrains, hybrid powertrains, low- or zero-carbon fuels, and hydrogen-powered batteries have become key technological paths and industrialization directions for effectively reducing carbon emissions and achieving the "dual carbon" goals.

[0003] As a key component of advanced powertrains, superchargers convert exhaust energy from the engine into compressed air power through exhaust-driven turbine-compressor systems, significantly improving engine intake density and combustion efficiency. Superchargers not only reshape the efficiency boundaries of advanced powertrains but also achieve a balance between energy conservation and emission reduction and power performance. Their technological complexity and market importance make them an irreplaceable, key component in modern industry, and continued innovation will ensure they continue to play a central role in the future energy transition.

[0004] Faced with increasing power density, rising exhaust temperatures, and increasingly complex application environments in current power systems, the reliability requirements for turbocharger bearing systems are becoming increasingly stringent. Traditional methods for evaluating and testing turbocharger bearing systems involve manually adjusting a single turbocharger parameter while the turbocharger is operating at a set speed. The reliability of the turbocharger bearing system is then evaluated after testing. For example, while the turbocharger is operating at a set speed, the corresponding valve is manually adjusted to control the oil input pressure to the turbocharger turbine for testing and evaluation. Alternatively, while the turbocharger is operating at a set speed, the corresponding valve is manually adjusted to control the gas output pressure of the turbocharger compressor for testing and evaluation. However, this traditional method cannot effectively evaluate the reliability of turbocharger bearing systems. Summary of the Invention

[0005] The object of the present invention is to provide a supercharger bearing system evaluation method and system, which can more effectively evaluate the reliability of the supercharger bearing system compared with traditional methods.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A method for evaluating a supercharger bearing system, comprising:

[0008] Controlling the operation of the supercharger according to a preset operating condition sequence, the preset operating condition sequence including at least one operating condition, and controlling the operation of the supercharger according to any operating condition in the preset operating condition sequence includes: setting a speed of a turbine device of the supercharger and boundary conditions of at least two operating parameters of the supercharger according to the any operating condition, so that the supercharger operates according to the set speed of the turbine device, and during operation, the at least two operating parameters of the supercharger respectively meet the corresponding boundary conditions;

[0009] After the supercharger has finished operating according to the preset operating condition sequence, the wear condition of the bearing system of the supercharger is detected to obtain an evaluation result of the bearing system of the supercharger.

[0010] In some embodiments, the preset operating condition sequence includes a speed-up operating condition and a speed-down operating condition performed sequentially;

[0011] Controlling the operation of the supercharger according to the speed-up operating condition includes: controlling the speed of the turbine device of the supercharger to increase from a low speed value to a high speed value, and during operation, making the at least two operating parameters of the supercharger respectively meet the corresponding boundary conditions;

[0012] Controlling the operation of the supercharger according to the deceleration condition includes: controlling the speed of the turbine device of the supercharger to decrease from the high speed value to the low speed value, and making the at least two operating parameters of the supercharger meet the corresponding boundary conditions during operation.

[0013] In some embodiments, the preset operating condition sequence includes a first speed-up operating condition, a first speed-down operating condition, a second speed-up operating condition, and a second speed-down operating condition performed in sequence;

[0014] The first speed-up operating condition indicates that the speed of the turbine device of the supercharger is increased from a low speed value to a first high speed value, and the first speed-down operating condition indicates that the speed of the turbine device is reduced from the first high speed value to the low speed value;

[0015] The second speed-up condition indicates increasing the speed of the turbine device of the supercharger from the low speed value to a second high speed value, and the second speed-down condition indicates decreasing the speed of the turbine device from the second high speed value to the low speed value.

[0016] In some embodiments, in the preset operating condition sequence, the second speed-up operating condition and the second speed-down operating condition are sequentially performed after the first speed-up operating condition and the first speed-down operating condition are cycled a preset number of times, and the preset number of times is greater than one.

[0017] In some embodiments, the duration of the first speed-up operating condition is consistent with the duration of the first speed-down operating condition, and the duration of the second speed-up operating condition is consistent with the duration of the second speed-down operating condition.

[0018] In some embodiments, controlling the supercharger to operate according to a preset operating sequence includes:

[0019] The supercharger is controlled to cyclically operate multiple times according to the preset operating condition sequence.

[0020] In some embodiments, the supercharger includes a turbine device, a compressor device, and a bearing system, wherein the turbine device and the compressor device are connected via the bearing system;

[0021] Controlling the operation of the supercharger according to any operating condition of the preset operating condition sequence includes:

[0022] The speed of the turbine device is set according to any of the operating conditions, and the first boundary condition of the operating parameters of the turbine device or / and the second boundary condition of the operating parameters of the compressor device or / and the third boundary condition of the operating parameters of the bearing system are set, so that the supercharger operates according to the set speed of the turbine device, and during operation, the operating parameters of the turbine device are made to meet the first boundary condition or / and the operating parameters of the compressor device are made to meet the second boundary condition or / and the operating parameters of the bearing system are made to meet the third boundary condition.

[0023] In some embodiments, obtaining the preset operating condition sequence includes:

[0024] Obtaining an actual map of the rotational speed of the turbine device when the supercharger is actually operating, wherein the actual map is formed by arranging the measured rotational speed values ​​of the turbine device at test time points;

[0025] According to the actual map fitting, a simulation test map is obtained, and according to the time-varying pattern of the rotation speed of the turbine device reflected by the simulation test map, the preset operating condition sequence is obtained.

[0026] A supercharger bearing system evaluation system, comprising:

[0027] a control module configured to control the execution module according to a preset operating condition sequence, so that the execution module controls the operation of the supercharger, wherein the preset operating condition sequence includes at least one operating condition, and controlling the operation of the supercharger according to any operating condition in the preset operating condition sequence includes: setting a rotational speed of a turbine device of the supercharger and boundary conditions of at least two operating parameters of the supercharger according to the any operating condition, so that the supercharger operates according to the set rotational speed of the turbine device, and during operation, the at least two operating parameters of the supercharger respectively meet the corresponding boundary conditions;

[0028] The execution module is used to control the supercharger to operate according to the set speed of the turbine device, and to make the at least two operating parameters of the supercharger meet the corresponding boundary conditions during the operation of the supercharger.

[0029] In some embodiments, the supercharger includes a turbine device, a compressor device, and a bearing system, wherein the turbine device and the compressor device are connected via the bearing system;

[0030] The operating parameters of the turbine device include: the temperature of the hot gas input to the turbine device and / or the hot gas input pressure of the turbine device and / or the gas output pressure of the turbine device;

[0031] The execution module includes:

[0032] a simulated hot gas generating device connected to the inlet of the turbine device, for inputting hot gas into the turbine device and controlling the temperature of the input hot gas;

[0033] and / or, an air inlet valve connected to the inlet of the turbine device for controlling the hot gas input pressure of the turbine device;

[0034] and / or, a first back-pressure valve connected to the outlet of the turbine device, for controlling the gas output pressure of the turbine device;

[0035] The operating parameters of the air compressor include the gas output pressure of the air compressor;

[0036] The execution module also includes:

[0037] a second back pressure valve connected to the outlet of the air compressor and used to control the gas output pressure of the air compressor;

[0038] The operating parameters of the bearing system include: the oil input pressure of the bearing system and / or the temperature of the oil input to the bearing system;

[0039] The execution module also includes:

[0040] a third regulating valve connected to the inlet of the bearing system and used to control the oil input pressure of the bearing system;

[0041] And / or, an oil supply device is connected to the inlet of the bearing system, and is used to input oil into the bearing system and control the temperature of the input oil.

[0042] It can be seen from the above technical solution that the supercharger bearing system evaluation method and system provided by the present invention include: controlling the operation of the supercharger according to a preset operating condition sequence, the preset operating condition sequence includes at least one operating condition, and controlling the operation of the supercharger according to any operating condition of the preset operating condition sequence includes: setting the speed of the turbine device of the supercharger and the boundary conditions of at least two operating parameters of the supercharger according to any operating condition, so that the supercharger operates according to the set speed of the turbine device, and during operation, the at least two operating parameters of the supercharger respectively meet the corresponding boundary conditions; after the supercharger completes the operation according to the preset operating condition sequence, detecting the wear condition of the bearing system of the supercharger to obtain the evaluation result of the bearing system of the supercharger.

[0043] The beneficial effect of the present invention is that the operation of the supercharger is controlled according to a preset operating condition sequence. Controlling the operation of the supercharger according to any operating condition in the preset operating condition sequence includes causing the supercharger to operate according to the speed of the set turbine device, and causing at least two operating parameters of the supercharger to meet corresponding boundary conditions during operation. In the test of controlling the operation of the supercharger, the test is performed by controlling multiple parameters of the supercharger. Compared with the traditional method based on the steady-state test of a single parameter of the supercharger, the test and evaluation can be more consistent with the operating scenario of the supercharger during actual application, and therefore the reliability of the supercharger bearing system can be more effectively evaluated. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0045] Figure 1 A flowchart of a supercharger bearing system evaluation method provided in one embodiment;

[0046] Figure 2 A speed spectrum of a turbine device in a method for evaluating a supercharger bearing system according to one embodiment;

[0047] Figure 3 An actual map of the rotational speed of the turbine device measured by a method for evaluating a supercharger bearing system according to an embodiment;

[0048] Figure 4 A schematic diagram of the connection between an execution module of a supercharger bearing system assessment system and a supercharger provided by an embodiment;

[0049] Figure 5 A schematic diagram of a supercharger bearing system evaluation system provided in accordance with an embodiment.

[0050] The reference numerals in the drawings of the specification include:

[0051] 1- Host computer, 2- Data programming and acquisition module, 3- Drive module, 4- Oil supply device, 5- Supercharger, 6- Hot gas generating device, 7- Fuel storage device, 8- Intake filter device, 9- Coarse back pressure valve, 10- Fine back pressure valve, 11- Intake valve, 12- Flow regulating valve, 13- Exhaust regulating valve, 14- Exhaust back pressure valve, 15- Oil pressure regulating valve, 16- Fuel regulating valve, 20- Execution module, 51- Turbine device, 52- Compressor device, 53- Bearing system. DETAILED DESCRIPTION

[0052] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0053] For reference Figure 1 , Figure 1 A flow chart of a supercharger bearing system evaluation method provided in one embodiment is shown in the figure. The supercharger bearing system evaluation method includes the following steps:

[0054] S11: Controlling the operation of the supercharger according to a preset operating condition sequence, wherein the preset operating condition sequence includes at least one operating condition. Controlling the operation of the supercharger according to any operating condition of the preset operating condition sequence includes: setting the speed of the turbine device of the supercharger and the boundary conditions of at least two operating parameters of the supercharger according to any operating condition, so that the supercharger operates according to the set speed of the turbine device, and during operation, the at least two operating parameters of the supercharger respectively meet the corresponding boundary conditions.

[0055] The supercharger includes a turbine device, a compressor device and a bearing system. Hot gas is input into the turbine device to drive the turbine of the turbine device to rotate, and then drives the compressor device to operate through the bearing system, so that the compressor device compresses the gas.

[0056] A preset operating condition sequence is formed by arranging at least one operating condition. Controlling the supercharger operation according to the preset operating condition sequence means controlling the supercharger operation according to the operating conditions in the preset operating condition sequence. The boundary conditions of the operating parameters are used to define the boundary conditions of the supercharger operating parameters. That is, during supercharger operation, the supercharger operating parameters must meet the boundary conditions corresponding to the operating parameters.

[0057] S12: After the supercharger has finished operating according to the preset operating condition sequence, detecting the wear condition of the bearing system of the supercharger to obtain an evaluation result of the bearing system of the supercharger.

[0058] After the supercharger has finished operating according to the preset operating condition sequence, the wear condition of the supercharger's bearing system is detected, and an evaluation result of the supercharger's bearing system is obtained according to the wear condition of the supercharger's bearing system.

[0059] The supercharger bearing system evaluation method of this embodiment controls the operation of the supercharger according to a preset operating condition sequence. Controlling the operation of the supercharger according to any operating condition in the preset operating condition sequence includes causing the supercharger to operate according to the speed of the set turbine device, and causing at least two operating parameters of the supercharger to meet corresponding boundary conditions during operation. In the test of controlling the operation of the supercharger, the test is performed by controlling multiple parameters of the supercharger. Compared with the traditional method based on the steady-state test of a single parameter of the supercharger, the test and evaluation can be more in line with the operating scenario of the actual application of the supercharger, and therefore the reliability of the supercharger bearing system can be more effectively evaluated.

[0060] In some embodiments, the preset operating condition sequence includes a speed-up operating condition and a speed-down operating condition performed in sequence; controlling the operation of the supercharger according to the speed-up operating condition includes: controlling the speed of the turbine device of the supercharger to increase from a low speed value to a high speed value, and making the at least two operating parameters of the supercharger meet the corresponding boundary conditions during operation; controlling the operation of the supercharger according to the speed-down operating condition includes: controlling the speed of the turbine device of the supercharger to decrease from the high speed value to the low speed value, and making the at least two operating parameters of the supercharger meet the corresponding boundary conditions during operation.

[0061] During actual supercharger operation, its turbine undergoes both acceleration and deceleration. In this embodiment, the preset operating sequence includes sequential acceleration and deceleration conditions. This allows the supercharger to be controlled according to the preset operating sequence to simulate actual supercharger operation, making supercharger testing more consistent with actual operating conditions. By controlling various supercharger parameters for dynamic testing, the reliability of the supercharger bearing system can be more effectively assessed. In this embodiment, the low and high speed values ​​are not limited and can be set based on the actual supercharger operation.

[0062] In some embodiments, the speed-up and speed-down operating conditions may be cycled multiple times within a preset operating condition sequence. During actual supercharger operation, its turbine assembly will cycle through the speed-up and speed-down processes multiple times. Therefore, the speed-up and speed-down operating conditions may be cycled multiple times within the preset operating condition sequence to simulate actual supercharger operation scenarios, making supercharger testing more consistent with actual operating conditions and facilitating a more effective assessment of the reliability of the supercharger bearing system.

[0063] In some embodiments, the duration of the speed-up condition is consistent with the duration of the speed-down condition. Specifically, the time it takes to increase the turbine speed from a low speed value to a high speed value in the speed-up condition is consistent with the time it takes to decrease the turbine speed from a high speed value to a low speed value in the speed-down condition. This allows the supercharger to be tested more accurately in accordance with its actual operating conditions. For example, the low speed value is represented by n1, and the high speed value is represented by n2, where n1 < n2. During the speed-up condition, the turbine speed is controlled to increase from n1 to n2, and during the speed-down condition, the turbine speed is controlled to decrease from n2 to n1. The corresponding duration for the speed-up condition is t01, and the corresponding duration for the speed-down condition is t01.

[0064] In some embodiments, the preset operating condition sequence includes a first speed-up operating condition, a first speed-down operating condition, a second speed-up operating condition, and a second speed-down operating condition performed in sequence; the first speed-up operating condition indicates that the speed of the turbine device of the supercharger is increased from a low speed value to a first high speed value, and the first speed-down operating condition indicates that the speed of the turbine device is reduced from the first high speed value to the low speed value; the second speed-up operating condition indicates that the speed of the turbine device of the supercharger is increased from the low speed value to a second high speed value, and the second speed-down operating condition indicates that the speed of the turbine device is reduced from the second high speed value to the low speed value.

[0065] In some actual operating scenarios of a supercharger, its turbine device will undergo a speed-up process and a speed-down process. The turbine device will experience a process in which the speed of the turbine device increases from a low speed value to a first high speed value, then decreases from the first high speed value to a low speed value, then increases from the low speed value to a second high speed value, and then decreases from the second high speed value to the low speed value. The first high speed value and the second high speed value are different. In this embodiment, the preset operating condition sequence includes a first speed-up condition, a first speed-down condition, a second speed-up condition, and a second speed-down condition, which are performed in sequence. The supercharger operation is controlled according to the preset operating condition sequence to simulate the actual operating scenario of the supercharger for testing. This makes the supercharger test more consistent with its actual operating conditions. By controlling multiple parameters of the supercharger for dynamic testing, the reliability of the supercharger bearing system can be effectively evaluated. In this embodiment, the low speed value, the first high speed value, and the second high speed value are not limited and can be set according to the actual operating conditions of the supercharger. For example, the low speed value is represented as n1, the first high speed value is represented as n2, the second high speed value is represented as n3, n1<n2 and n1<n3, n2≠n3, and during the test, the speed of the turbine device is controlled to increase from n1 to n2, decrease from n2 to n1, then increase from n1 to n3, and decrease from n3 to n1 in sequence.

[0066] In some embodiments, in a preset operating sequence, the first speed-up and first speed-down operating conditions are cycled a preset number of times before the second speed-up and second speed-down operating conditions are sequentially performed, where the preset number is greater than one. That is, in the preset operating sequence, the first speed-up and first speed-down operating conditions are cycled a preset number of times, followed by the second speed-up and second speed-down operating conditions. In this embodiment, the value of the preset number is not limited and can be set based on the actual operating conditions of the supercharger.

[0067] In some embodiments, the duration of the first speed-up operating condition is consistent with the duration of the first speed-down operating condition, that is, the time taken to increase the speed of the turbine device from a low speed value to a first high speed value according to the first speed-up operating condition is consistent with the time taken to reduce the speed of the turbine device from the first high speed value to a low speed value according to the first speed-down operating condition.

[0068] In some embodiments, the duration of the second speed-up operating condition is the same as the duration of the second speed-down operating condition. That is, the duration of increasing the speed of the turbine device from the low speed value to the second high speed value according to the second speed-up operating condition is the same as the duration of decreasing the speed of the turbine device from the second high speed value to the low speed value according to the second speed-down operating condition.

[0069] For example, the low speed value is represented by n1, the first high speed value is represented by n2, and the second high speed value is represented by n3, and n1<n3<n2. In the preset operating condition sequence, the first speed-up operating condition and the first speed-down operating condition are cycled three times, and then the second speed-up operating condition and the second speed-down operating condition are performed in sequence. The first speed-up operating condition corresponds to a duration of t01, the first speed-down operating condition corresponds to a duration of t01, the second speed-up operating condition corresponds to a duration of t02, and the second speed-down operating condition corresponds to a duration of t02. Figure 2 , Figure 2 This is a turbine speed spectrum for a supercharger bearing system evaluation method according to one embodiment. The vertical axis represents the turbine speed n, and the horizontal axis represents time t. As shown, the turbine speed increases from n1 to n2 and then decreases from n2 to n1 three times, then increases from n1 to n3 and then decreases from n3 to n1. The increase from n1 to n2 takes time t01, the decrease from n2 to n1 takes time t01, the increase from n1 to n3 takes time t02, and the decrease from n3 to n1 takes time t02.

[0070] In some embodiments, controlling the supercharger to operate according to a preset operating sequence includes: controlling the supercharger to operate in a cycle multiple times according to the preset operating sequence. In this way, the supercharger's actual operating scenario is simulated to control the supercharger's operation for testing and evaluation, so that the supercharger test is more consistent with its actual operating conditions, and the reliability of the supercharger bearing system can be effectively evaluated, thereby reducing the supercharger failure rate in actual application scenarios. Figure 2 As shown, the supercharger is controlled to cycle the first speed-up operating condition and the first speed-down operating condition three times, and then to cycle the second speed-up operating condition and the second speed-down operating condition once, and this operating condition sequence is cycled multiple times.

[0071] In some embodiments, obtaining the preset operating condition sequence includes: obtaining an actual spectrum of the rotational speed of the turbine device when the supercharger is actually operating, the actual spectrum being formed by arranging the measured rotational speed values ​​of the turbine device along the test time points; obtaining a simulated test spectrum based on the actual spectrum fitting, and obtaining the preset operating condition sequence based on the time-varying pattern of the rotational speed of the turbine device reflected in the simulated test spectrum. When the supercharger is actually operating, the rotational speed value of the turbine device is measured and combined with the test time to obtain an actual spectrum of the rotational speed of the turbine device; further, according to the actual spectrum fitting, a simulated test spectrum is obtained, and then the preset operating condition sequence is obtained by simulating the test spectrum. For example, reference may be made to Figure 3 , Figure 3 This is an actual spectrum of the turbine speed measured by the supercharger bearing system evaluation method according to an embodiment. The vertical axis represents the turbine speed in r / min, and the horizontal axis represents time. Time can be understood as the duration from the start of the test to the current moment in seconds. Figure 3 The actual spectrum shown is fitted to obtain Figure 2The diagram shown.

[0072] The boundary conditions of the operating parameters of the supercharger can be determined based on experience, or actual test data of the operating parameters can be measured when the supercharger is actually operating, and the boundary conditions of the operating parameters can be determined based on the actual test data.

[0073] The supercharger includes a turbine assembly, a compressor assembly, and a bearing system, with the turbine assembly and the compressor assembly connected via the bearing system. In some embodiments, controlling the operation of the supercharger according to any operating condition in the preset operating condition sequence includes: setting the speed of the turbine assembly according to any operating condition, and setting a first boundary condition for the operating parameters of the turbine assembly, a second boundary condition for the operating parameters of the compressor assembly, and a third boundary condition for the operating parameters of the bearing system, so that the supercharger operates according to the set speed of the turbine assembly, and during operation, the operating parameters of the turbine assembly meet the first boundary condition, the operating parameters of the compressor assembly meet the second boundary condition, and the operating parameters of the bearing system meet the third boundary condition. The first boundary condition is a boundary condition for limiting the operating parameters of the turbine assembly, i.e., during supercharger operation, the operating parameters of the turbine assembly must meet the first boundary condition. The second boundary condition is a boundary condition for limiting the operating parameters of the compressor assembly, i.e., during supercharger operation, the operating parameters of the compressor assembly must meet the second boundary condition. The third boundary condition is a boundary condition for limiting the operating parameters of the bearing system, that is, the operating parameters of the bearing system must meet the third boundary condition during the operation of the supercharger.

[0074] Any operating condition in the preset operating condition sequence can set a first boundary condition for the operating parameters of the turbine device. Therefore, when the supercharger is controlled to operate according to the operating condition for testing, the operating parameters of the turbine device can be restricted to comply with the first boundary condition during supercharger operation. Any operating condition in the preset operating condition sequence can set a second boundary condition for the operating parameters of the compressor device. Therefore, when the supercharger is controlled to operate according to the operating condition for testing, the operating parameters of the compressor device can be restricted to comply with the second boundary condition during supercharger operation. Any operating condition in the preset operating condition sequence can set a third boundary condition for the operating parameters of the bearing system. Therefore, when the supercharger is controlled to operate according to the operating condition for testing, the operating parameters of the bearing system can be restricted to comply with the third boundary condition during supercharger operation.

[0075] In some embodiments, the boundary conditions may define boundary values ​​of operating parameters of the supercharger. For example, a first boundary condition defines boundary values ​​of operating parameters of the turbine assembly, a second boundary condition defines boundary values ​​of operating parameters of the compressor assembly, and a third boundary condition defines boundary values ​​of operating parameters of the bearing system.

[0076] In some embodiments, the operating parameters of the bearing system may include, but are not limited to, the oil input pressure and the temperature of the input oil of the bearing system. The operating parameters of the turbine device may include, but are not limited to, the temperature of the hot gas input to the turbine device, the hot gas input pressure of the turbine device, and the gas output pressure of the turbine device. The operating parameters of the compressor device may include, but are not limited to, the gas output pressure of the compressor device. Accordingly, the first boundary condition may define the conditions that the temperature of the hot gas input to the turbine device, the hot gas input pressure of the turbine device, and the gas output pressure of the turbine device must meet, respectively. The second boundary condition may define the conditions that the gas output pressure of the compressor device must meet. The third boundary condition may define the conditions that the oil input pressure and the temperature of the input oil of the bearing system must meet.

[0077] For example, in one specific example, the supercharger is controlled to cycle through the first speed-up condition and the first speed-down condition three times in one cycle, and then to cycle through the second speed-up condition and the second speed-down condition once. The speed, duration, and boundary conditions corresponding to each condition are shown in Table 1 below.

[0078] Table 1

[0079]

[0080] Among them, the adjustment time indicates the duration corresponding to the working condition, the supercharger speed indicates the speed of the turbine device of the supercharger, the oil pressure indicates the oil input pressure of the bearing system, the oil temperature indicates the temperature of the oil input to the bearing system, the turbine inlet temperature indicates the temperature of the hot gas input to the turbine device, the compressor outlet pressure indicates the gas output pressure of the compressor device, and the turbine outlet pressure indicates the gas output pressure of the turbine device.

[0081] Accordingly, the process of testing a supercharger includes:

[0082] Working condition ①: increase the speed of the turbocharger's turbine device from n1 to n2 within t01, set the oil pressure to p0-2, the oil inlet temperature to T0-2, the turbine inlet temperature to T3-2, the compressor outlet pressure to p2-2, and the turbine outlet pressure to p4-2.

[0083] Working condition ②: quickly reduce the speed of the turbocharger turbine device to n1 within t01, set the oil pressure to p0-1, the oil inlet temperature to T0-1, the turbine inlet temperature to T3-1, the compressor outlet pressure to p2-1, and the turbine outlet pressure to p4-1.

[0084] After cycling through operating conditions ① and ② three times, proceed to operating condition ⑦. Rapidly increase the speed of the turbocharger's turbine device from n1 to n3 within t02, set the oil pressure to p0-3, the oil inlet temperature to T0-3, the turbine inlet temperature to T3-3, the compressor outlet pressure to p2-3, and the turbine outlet pressure to p4-3.

[0085] Working condition ⑧: quickly reduce the speed of the turbocharger turbine device to n1 within t02, set the oil pressure to p0-1, the oil inlet temperature to T0-1, the turbine inlet temperature to T3-1, the compressor outlet pressure to p2-1, and the turbine outlet pressure to p4-1.

[0086] Working conditions ①-⑧ are defined as a large cycle, which is carried out in a cycle according to the large cycle working condition. The number of cycles is N, where N is a positive integer greater than or equal to 1.

[0087] In each of the above operating conditions, the oil pressure is set to p0-1 / p0-2 / p0-3, the oil inlet temperature is set to T0-1 / T0-2 / T0-3, the turbine inlet temperature is set to T3-1 / T3-2 / T3-3, the compressor outlet pressure is set to p2-1 / p2-2 / p2-3, and the turbine outlet pressure is set to p4-1 / p4-2 / p4-3. The set values ​​are the corresponding boundary values ​​of the parameters. This means that when operating according to the operating conditions, the oil pressure must be less than or equal to p0-1 / p0-2 / p0-3, the oil inlet temperature must be less than or equal to p0-1 / p0-2 / p0-3, the turbine inlet temperature must be less than or equal to T3-1 / T3-2 / T3-3, the compressor outlet pressure must be less than or equal to p2-1 / p2-2 / p2-3, and the turbine outlet pressure must be less than or equal to p4-1 / p4-2 / p4-3. After the test, the supercharger bearing system is disassembled and measured. Special equipment can be used to check whether the wear condition meets the standard requirements.

[0088] The boundary values ​​of each parameter, such as the oil input pressure of the bearing system, the temperature of the oil input to the bearing system, the temperature of the hot gas input to the turbine device, the hot gas input pressure of the turbine device, the gas output pressure of the turbine device, and the gas output pressure of the compressor device, can be determined based on experience, or actual road spectrum test data of each parameter can be measured during actual operation of the supercharger, and the boundary values ​​of each parameter can be determined based on the measured data.

[0089] This embodiment further provides a supercharger bearing system evaluation system, comprising:

[0090] a control module configured to control the execution module according to a preset operating condition sequence, so that the execution module controls the operation of the supercharger, wherein the preset operating condition sequence includes at least one operating condition, and controlling the operation of the supercharger according to any operating condition in the preset operating condition sequence includes: setting a rotational speed of a turbine device of the supercharger and boundary conditions of at least two operating parameters of the supercharger according to the any operating condition, so that the supercharger operates according to the set rotational speed of the turbine device, and during operation, the at least two operating parameters of the supercharger respectively meet the corresponding boundary conditions;

[0091] The execution module is used to control the supercharger to operate according to the set speed of the turbine device, and to make the at least two operating parameters of the supercharger meet the corresponding boundary conditions during the operation of the supercharger.

[0092] The supercharger bearing system evaluation system of this embodiment controls the operation of the supercharger according to a preset operating condition sequence. Controlling the operation of the supercharger according to any operating condition in the preset operating condition sequence includes causing the supercharger to operate according to the speed of the set turbine device, and causing at least two operating parameters of the supercharger to meet corresponding boundary conditions during operation. In the test of controlling the operation of the supercharger, the test is performed by controlling multiple parameters of the supercharger. Compared with the traditional method based on the steady-state test of a single parameter of the supercharger, the test and evaluation can be more in line with the operating scenario of the actual application of the supercharger, and therefore the reliability of the supercharger bearing system can be more effectively evaluated.

[0093] In some embodiments, the operating parameters of the turbine device include: the temperature of the hot gas input to the turbine device, and / or the hot gas input pressure to the turbine device, and / or the gas output pressure of the turbine device; the execution module includes: a simulated hot gas generating device connected to the inlet of the turbine device, for inputting hot gas to the turbine device and controlling the temperature of the input hot gas; and / or an air intake valve connected to the inlet of the turbine device, for controlling the hot gas input pressure to the turbine device; and / or a first backpressure valve connected to the outlet of the turbine device, for controlling the gas output pressure of the turbine device. In some embodiments, the execution module may also include: a first regulating valve connected to the inlet of the turbine device, for controlling the flow rate of the hot gas input to the turbine device.

[0094] In some embodiments, the operating parameter of the air compressor includes the gas output pressure of the air compressor; the execution module includes a second backpressure valve connected to the outlet of the air compressor for controlling the gas output pressure of the air compressor. The execution module may also include a second regulating valve connected to the outlet of the air compressor for controlling the flow rate of the output gas of the air compressor.

[0095] In some embodiments, the operating parameters of the bearing system may include: the bearing system's oil input pressure and / or the bearing system's oil input temperature. The execution module includes: a third regulating valve connected to the bearing system's inlet for controlling the bearing system's oil input pressure; and / or an oil supply device connected to the bearing system's inlet for supplying oil to the bearing system and controlling its temperature. The third regulating valve may be connected to the bearing system's inlet and the oil supply device, respectively. The third regulating valve may be referred to as an oil pressure regulating valve.

[0096] In some embodiments, the supercharger bearing system assessment system may further include: a fuel storage device connected to the hot gas generator, configured to supply fuel to the hot gas generator to provide the fuel required by the hot gas generator. A fourth regulating valve may also be provided to control the flow rate of fuel supplied from the fuel storage device to the hot gas generator. In some embodiments, the supercharger bearing system assessment system may further include: an air intake filter device connected to the inlet of the air compressor, configured to filter the air entering the air compressor to prevent particulate matter from entering the air compressor and damaging the supercharger.

[0097] For example, you can refer to Figure 4 , Figure 4 A schematic diagram of the connection between the execution module and the supercharger of a supercharger bearing system assessment system provided in one embodiment. As shown, the supercharger 5 includes a turbine device 51, a compressor device 52, and a bearing system 53. The oil supply device 4 is connected to the inlet of the bearing system 53 for supplying oil to the bearing system 53. The oil supply device 4 provides the lubricating oil required by the supercharger's bearing system 53. The oil pressure regulating valve 15 is connected to the bearing system 53 and the oil supply device 4, respectively, for controlling the oil input pressure of the supercharger's bearing system 53. The oil pressure regulating valve 15 can be an intelligent oil pressure regulating valve.

[0098] The hot gas generator 6 is connected to the inlet of the turbine assembly 51 and is used to supply hot gas to the turbine assembly 51. It can also be referred to as a simulated hot gas generation unit. An intake valve 11 is connected to the hot gas generator 6 and is used to control the hot gas input pressure to the turbine assembly 51. A fuel storage device 7 is connected to the hot gas generator 6 and is used to supply fuel to the hot gas generator 6. A fuel regulating valve 16 is connected to the fuel storage device 7 at one end and to the hot gas generator 6 at the other end, controlling the flow rate of fuel from the fuel storage device 7 to the hot gas generator 6. The exhaust regulating valve 13 is used to control the flow rate of hot gas from the hot gas generator 6 to the inlet of the turbine assembly 51. The exhaust backpressure valve 14 is used to control the backpressure at the outlet of the turbine assembly 51.

[0099] The air inlet filter device 8 is connected to the inlet of the air compressor 52. The coarse-adjustment back-pressure valve 9 and the fine-adjustment back-pressure valve 10 are respectively connected to the outlet of the air compressor 52. The flow control valve 12 is connected to the outlet of the air compressor 52. The coarse-adjustment back-pressure valve 9 can be an intelligent coarse-adjustment back-pressure valve, and the fine-adjustment back-pressure valve 10 can be an intelligent fine-adjustment back-pressure valve. The flow control valve 12 is used to control the flow of compressed gas generated by the air compressor 52 into the hot gas generator 6. The compressed gas generated by the air compressor 52 enters the hot gas generator 6 to participate in combustion, reducing the supply of external gas sources and saving testing costs.

[0100] In some embodiments, the control module may include: a host computer, which is used to generate a program through programming software according to the boundary conditions of the at least two operating parameters of the supercharger and import the program into a data programming acquisition module; a data programming acquisition module, which is used to run the program and drive the execution module through the driver module; and an execution module connected to the driver module. The driver module may include but is not limited to a drive motor frequency modulation module and a valve positioning module. The valve positioning module may be but is not limited to an intelligent valve positioning module. Figure 5 , Figure 5 This is a schematic diagram of a supercharger bearing system evaluation system provided by an embodiment. As shown in the figure, the host computer 1 is connected to the data programming and acquisition module 2, and the data programming and acquisition module 2 is connected to the drive module 3.

[0101] The supercharger bearing system assessment method and system of this embodiment can simulate actual supercharger application scenarios, meeting the requirements of multivariable transient dynamic testing. This provides a more rigorous assessment of the supercharger bearing system, closer to actual application scenarios. Compared to traditional methods based on single-parameter steady-state testing of the supercharger, this method and system can more effectively assess the reliability of the supercharger bearing system. This embodiment can be coupled with complex actual supercharger application scenarios, simulating multivariable dynamic testing in real-world complex scenarios. This can effectively assess the bearing system reliability and reduce the supercharger failure rate in actual application scenarios.

[0102] The above describes in detail the supercharger bearing system assessment method and system provided by the present invention. This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above examples is intended only to facilitate understanding of the method and core concepts of the present invention. It should be noted that those skilled in the art may make various improvements and modifications to the present invention without departing from the principles of the present invention, and such improvements and modifications are also within the scope of protection of the present invention.

Claims

1. A method for evaluating a supercharger bearing system, characterized in that: include: Controlling the operation of the supercharger according to a preset operating condition sequence, the preset operating condition sequence including at least one operating condition, and controlling the operation of the supercharger according to any operating condition in the preset operating condition sequence includes: setting a speed of a turbine device of the supercharger and boundary conditions of at least two operating parameters of the supercharger according to the any operating condition, so that the supercharger operates according to the set speed of the turbine device, and during operation, the at least two operating parameters of the supercharger respectively meet the corresponding boundary conditions; After the supercharger has finished operating according to the preset operating condition sequence, the wear condition of the bearing system of the supercharger is detected to obtain an evaluation result of the bearing system of the supercharger.

2. The supercharger bearing system evaluation method according to claim 1, characterized in that: The preset operating condition sequence includes a speed-up operating condition and a speed-down operating condition performed in sequence; Controlling the operation of the supercharger according to the speed-up operating condition includes: controlling the speed of the turbine device of the supercharger to increase from a low speed value to a high speed value, and during operation, making the at least two operating parameters of the supercharger respectively meet the corresponding boundary conditions; Controlling the operation of the supercharger according to the deceleration condition includes: controlling the speed of the turbine device of the supercharger to decrease from the high speed value to the low speed value, and making the at least two operating parameters of the supercharger meet the corresponding boundary conditions during operation.

3. The supercharger bearing system evaluation method according to claim 1, characterized in that: The preset operating condition sequence includes a first speed-up operating condition, a first speed-down operating condition, a second speed-up operating condition, and a second speed-down operating condition, which are performed in sequence; The first speed-up operating condition indicates that the speed of the turbine device of the supercharger is increased from a low speed value to a first high speed value, and the first speed-down operating condition indicates that the speed of the turbine device is reduced from the first high speed value to the low speed value; The second speed-up condition indicates increasing the speed of the turbine device of the supercharger from the low speed value to a second high speed value, and the second speed-down condition indicates decreasing the speed of the turbine device from the second high speed value to the low speed value.

4. The supercharger bearing system evaluation method according to claim 3, characterized in that: In the preset operating condition sequence, the second speed-up operating condition and the second speed-down operating condition are sequentially performed after the first speed-up operating condition and the first speed-down operating condition are cycled for a preset number of times, and the preset number of times is greater than one.

5. The supercharger bearing system evaluation method according to claim 3, characterized in that: The duration of the first speed-up operating condition is consistent with the duration of the first speed-down operating condition, and the duration of the second speed-up operating condition is consistent with the duration of the second speed-down operating condition.

6. The supercharger bearing system evaluation method according to claim 1, characterized in that: Controlling the operation of the supercharger according to a preset operating sequence includes: The supercharger is controlled to cyclically operate multiple times according to the preset operating condition sequence.

7. The supercharger bearing system evaluation method according to any one of claims 1 to 6, characterized in that: The supercharger includes a turbine device, a compressor device and a bearing system, wherein the turbine device and the compressor device are connected via the bearing system; Controlling the operation of the supercharger according to any operating condition of the preset operating condition sequence includes: The speed of the turbine device is set according to any of the operating conditions, and the first boundary condition of the operating parameters of the turbine device or / and the second boundary condition of the operating parameters of the compressor device or / and the third boundary condition of the operating parameters of the bearing system are set, so that the supercharger operates according to the set speed of the turbine device, and during operation, the operating parameters of the turbine device are made to meet the first boundary condition or / and the operating parameters of the compressor device are made to meet the second boundary condition or / and the operating parameters of the bearing system are made to meet the third boundary condition.

8. The supercharger bearing system evaluation method according to any one of claims 1 to 6, characterized in that: Obtaining the preset operating condition sequence includes: Obtaining an actual map of the rotational speed of the turbine device when the supercharger is actually operating, wherein the actual map is formed by arranging the measured rotational speed values ​​of the turbine device at test time points; According to the actual map fitting, a simulation test map is obtained, and according to the time-varying pattern of the rotation speed of the turbine device reflected by the simulation test map, the preset operating condition sequence is obtained.

9. A supercharger bearing system evaluation system, characterized in that: include: a control module configured to control the execution module according to a preset operating condition sequence, so that the execution module controls the operation of the supercharger, wherein the preset operating condition sequence includes at least one operating condition, and controlling the operation of the supercharger according to any operating condition in the preset operating condition sequence includes: setting a rotational speed of a turbine device of the supercharger and boundary conditions of at least two operating parameters of the supercharger according to the any operating condition, so that the supercharger operates according to the set rotational speed of the turbine device, and during operation, the at least two operating parameters of the supercharger respectively meet the corresponding boundary conditions; The execution module is used to control the supercharger to operate according to the set speed of the turbine device, and to make the at least two operating parameters of the supercharger meet the corresponding boundary conditions during the operation of the supercharger.

10. The supercharger bearing system evaluation system according to claim 9, characterized in that: The supercharger includes a turbine device, a compressor device and a bearing system, wherein the turbine device and the compressor device are connected via the bearing system; The operating parameters of the turbine device include: the temperature of the hot gas input to the turbine device and / or the hot gas input pressure of the turbine device and / or the gas output pressure of the turbine device; The execution module includes: a simulated hot gas generating device connected to the inlet of the turbine device, for inputting hot gas into the turbine device and controlling the temperature of the input hot gas; and / or, an air inlet valve connected to the inlet of the turbine device for controlling the hot gas input pressure of the turbine device; and / or, a first back-pressure valve connected to the outlet of the turbine device, for controlling the gas output pressure of the turbine device; The operating parameters of the air compressor include the gas output pressure of the air compressor; The execution module also includes: a second back pressure valve connected to the outlet of the air compressor and used to control the gas output pressure of the air compressor; The operating parameters of the bearing system include: the oil input pressure of the bearing system and / or the temperature of the oil input to the bearing system; The execution module also includes: a third regulating valve connected to the inlet of the bearing system and used to control the oil input pressure of the bearing system; And / or, an oil supply device is connected to the inlet of the bearing system, and is used to input oil into the bearing system and control the temperature of the input oil.

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