A device for automatic protection of supercharger test bench power failure

Abstract

The utility model belongs to turbocharger test technical field, concretely relates to a device for supercharger test bench power failure automatic protection, including mutually coordinated oil path protection device and gas path protection device: oil path protection device connects between oil supply pipe and supercharger oil inlet, is composed of first check valve, second check valve, oil tank, hand valve, first normally closed solenoid valve, can through oil tank to supercharger continuous oil supply when power failure, gas path protection device connects in supercharger air supply pipeline, is composed of second normally closed solenoid valve, pneumatic stop valve, can cut off the air pressure supply to supercharger when power failure. The device simple structure, easy operation can effectively avoid the damage of power failure to supercharger, reduce test cost, be applicable to supercharger batch test scene.

Description

Technical Field

[0001] This utility model belongs to the field of turbocharger testing technology, specifically relating to a device for automatic power-off protection of a turbocharger test bench. Background Technology

[0002] As a core component of internal combustion engines, turbochargers can significantly improve engine power output, reduce fuel consumption, and effectively improve exhaust emission performance. In the current context of global energy shortages and continuous environmental degradation, the adoption of exhaust gas turbocharging technology has become an inevitable development direction for the internal combustion engine industry to achieve energy conservation, emission reduction, and meet environmental protection requirements. Its applications cover multiple fields such as automobiles, ships, and construction machinery.

[0003] To ensure that the performance stability, reliability, and safety of turbochargers meet industry standards, the national standard "Turbochargers Part 1: General Technical Conditions" (GB / T 23341.1-2018) has been promulgated. This standard clearly stipulates mandatory testing requirements for various performance indicators of turbochargers. Therefore, during the research and development, production, and quality inspection stages of turbochargers, systematic testing using a dedicated test bench is necessary to verify whether they meet the standard requirements.

[0004] However, existing turbocharger test benches have significant technical defects in actual operation: when a sudden power outage occurs during testing, the test bench's oil supply system immediately stops working, causing the turbocharger to experience dry friction due to the lack of lubrication; simultaneously, the air supply system cannot cut off the air pressure supply in time, allowing the turbocharger to continue operating without oil lubrication, which can easily lead to serious damage such as turbocharger bearing wear, rotor jamming, or even complete scrapping. Currently, there are no effective automatic protection devices on the market for turbocharger test benches in the event of a power outage. Such power outage damage not only interrupts the testing process and increases testing costs, but also results in a significant waste of equipment resources.

[0005] Therefore, developing a device that can automatically activate the protection function when the turbocharger test bench suddenly loses power to avoid damage to the turbocharger has become a key issue that urgently needs to be solved in the field of turbocharger testing technology. Utility Model Content

[0006] In view of the technical problems existing in the current turbocharger test bench, the present invention provides a device for automatic protection against power failure of the turbocharger test bench.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: A device for automatic power failure protection of a turbocharger test bench includes an oil circuit protection device and an air circuit protection device that cooperate to achieve power failure protection; the oil circuit protection device is connected between the oil supply pipe and the turbocharger oil inlet, and is used to continuously supply oil to the turbocharger when power is lost; the air circuit protection device is connected to the turbocharger's air supply pipe, and is used to cut off the turbocharger's air pressure supply when power is lost.

[0008] The oil circuit protection device includes a first check valve, a second check valve, an oil reservoir, a manual valve, and a first normally closed solenoid valve. The input end of the first check valve is connected to the oil supply pipe, and the output end of the first check valve is directly connected to the oil inlet of the booster. The input end of the second check valve is connected to the oil supply pipe, and the output end of the second check valve is connected to the input end of the oil reservoir. The output end of the oil reservoir is connected to the input end of the manual valve, the output end of the manual valve is connected to the input end of the first normally closed solenoid valve, and the output end of the first normally closed solenoid valve is connected to the oil inlet of the booster.

[0009] The input end of the first check valve and the input end of the second check valve are connected in parallel on the same section of the oil supply pipe, and the output end of the first check valve and the output end of the first normally closed solenoid valve converge to the oil inlet of the booster.

[0010] The manual valve and the first normally closed solenoid valve are connected in series along the oil supply direction from the oil storage tank to the inlet of the booster, forming an independent branch pipeline for supplying oil from the oil storage tank to the inlet of the booster.

[0011] The air circuit protection device includes a second normally closed solenoid valve and a pneumatic shut-off valve; the output end of the second normally closed solenoid valve is connected to the control end of the pneumatic shut-off valve, and the valve body of the pneumatic shut-off valve is connected in series to the air supply line of the booster.

[0012] The pneumatic shut-off valve is installed in the air supply line between the air inlet end of the air supply line and the compressor end of the turbocharger. It is used to cut off the air supply from the air supply line to the compressor end of the turbocharger when the power is off, or to open the air supply path during normal testing.

[0013] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model boasts significant advantages in structural design and ease of operation. The entire system comprises an oil circuit protection device and a pneumatic circuit protection device. The oil circuit protection device includes a first one-way valve, a second one-way valve, an oil reservoir, a manual valve, and a first normally closed solenoid valve. The pneumatic circuit protection device includes a second normally closed solenoid valve and a pneumatic shut-off valve. The entire system contains no complex or precision-specific components, simplifying assembly and reducing maintenance costs. Operationally, basic operations can be completed simply by opening the manual valve before the test begins and closing it before the test ends. No dedicated technical personnel are required for continuous monitoring, making it easily adaptable to testing scenarios during the mass production of turbochargers and meeting the needs of large-scale testing. Its practicality is extremely high.

[0014] 2. This utility model effectively avoids the problem of turbocharger damage caused by sudden power failure of the turbocharger test bench, achieving a core protection effect. Regarding oil circuit protection, during normal testing, the oil supply pipe stores oil in the oil tank through the second one-way valve. After a sudden power failure, the first normally closed solenoid valve opens, and the oil tank continuously supplies oil to the turbocharger for about 1 minute along the pipeline composed of the hand valve and the first normally closed solenoid valve. This prevents the turbocharger from experiencing dry friction due to loss of lubrication, thus preventing bearing wear, rotor jamming, and other malfunctions. Regarding air circuit protection, during normal testing, the normally closed solenoid valve continues to operate to prevent the pneumatic shut-off valve from cutting off the air supply. After a power failure, the second normally closed solenoid valve fails, and the connected pneumatic shut-off valve quickly closes, cutting off the air pressure supply from the make-up air pipeline to the compressor end of the turbocharger. This causes the turbocharger to stop operating quickly, preventing further damage caused by continuous operation under lubricating oil pressure drop, fundamentally reducing the risk of turbocharger damage during testing.

[0015] 3. This utility model brings significant cost benefits to the turbocharger testing process, effectively reducing the economic losses caused by test failures. When the test bench suddenly loses power and there is no protection device, turbocharger damage will result in two types of costs: direct costs, including turbocharger repair costs and the cost of replacing the turbocharger with spare parts; and indirect costs, including wasted time due to test interruption and production delays caused by batch testing delays. This device, through the coordinated protection of the oil and air circuits, can significantly reduce the number of test failures caused by power outages, thus reducing turbocharger spare parts consumption and repair expenses, and avoiding time losses and production delays caused by test rework, providing a reliable guarantee for the economic efficiency of turbocharger testing. Attached Figure Description

[0016] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0017] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportional relationships, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0018] Figure 1 This is a schematic diagram of the oil circuit protection device of this utility model patent; Figure 2 This is a schematic diagram of the gas path protection device of this utility model patent.

[0019] Wherein: 1 is the first check valve, 2 is the second check valve, 3 is the oil storage tank, 4 is the manual valve, 5 is the first normally closed solenoid valve, 6 is the second normally closed solenoid valve, and 7 is the pneumatic shut-off valve. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. These descriptions are only for further illustrating the features and advantages of this utility model, and not for limiting the claims of this utility model. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0022] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0023] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0024] This embodiment provides a device for automatic power failure protection of a turbocharger test bench. Through the coordinated operation of an oil circuit protection device and a gas circuit protection device, it protects the turbocharger under normal test conditions and sudden power failure conditions, respectively. Figure 1 , Figure 2 As shown, the specific working process is as follows: I. Normal Test Conditions 1. Operation of the oil circuit protection device: The oil in the supply pipe is diverted through the first check valve 1 and the second check valve 2 connected in parallel on the same pipe section. The input end of the first check valve 1 is connected to the oil supply pipe, and its output end is directly connected to the inlet of the booster, providing a continuous supply of lubricating oil for the booster's test operation. Simultaneously, the input end of the second check valve 2 is connected to the oil supply pipe, and its output end is connected to the input end of the oil storage tank 3, diverting some oil into the storage tank 3 for storage, preparing for emergency oil supply in case of power failure. In this state, the hand valve 4 remains open, and the first normally closed solenoid valve 5 remains closed due to energization, preventing premature oil outflow from the storage tank 3 and ensuring that the storage tank 3 can fully store emergency oil.

[0025] 2. Working process of the gas circuit protection device: When the second normally closed solenoid valve 6 is energized, its output end transmits a control signal to the control end of the pneumatic shut-off valve 7, keeping the pneumatic shut-off valve 7 in the conducting state. Since the valve body of the pneumatic shut-off valve 7 is connected in series in the gas supply pipeline and is installed between the gas supply pipeline inlet end and the compressor end of the booster, the gas in the gas supply pipeline can be continuously delivered to the compressor end of the booster through the conducting pneumatic shut-off valve 7, meeting the gas pressure requirements during normal testing of the booster.

[0026] II. Power Failure Protection Status 1. Working process of oil circuit protection device: After a sudden power failure, the oil supply pipe stops supplying oil to the device, and the first normally closed solenoid valve 5 switches from the closed state to the open state due to the loss of power; at this time, the oil pre-stored in the oil tank 3 flows along the independent branch pipe from the oil tank 3 to the hand valve 4 to the first normally closed solenoid valve 5 to the oil inlet of the booster, continuously supplying oil to the booster (about 1 minute) to avoid dry friction of the booster due to the loss of lubrication oil supply; at the same time, the first one-way valve 1, due to the lack of oil input on the oil supply pipe side, prevents the oil on the booster inlet side from flowing back to the oil supply pipe by its own one-way conduction characteristic, ensuring the oil supply efficiency of the oil tank 3 to the booster.

[0027] 2. Operation of the gas circuit protection device: After power failure, the second normally closed solenoid valve 6 loses power and stops working. The signal it transmits to the control end of the pneumatic shut-off valve 7 is interrupted, and the pneumatic shut-off valve 7 quickly switches from the conducting state to the closed state. After closing, the pneumatic shut-off valve 7 cuts off the gas passage between the gas supply pipeline and the compressor end of the turbocharger, stops the gas supply to the compressor end of the turbocharger, and causes the turbocharger to stop running quickly, so as to avoid the turbocharger from continuing to run under insufficient lubricating oil supply, and further prevent damage problems such as bearing wear and rotor jamming.

[0028] The above description only describes the preferred embodiments of the present utility model. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model, and all such changes should be included within the protection scope of the present utility model.

Claims

1. A device for automatic power failure protection of a booster test bench, characterized in that: It includes an oil circuit protection device and an air circuit protection device that work together to achieve power failure protection; the oil circuit protection device is connected between the oil supply pipe and the turbocharger oil inlet, and is used to continuously supply oil to the turbocharger when power is lost; the air circuit protection device is connected to the turbocharger's air supply pipe, and is used to cut off the turbocharger's air pressure supply when power is lost.

2. The device for automatic power failure protection of a booster test bench according to claim 1, characterized in that: The oil circuit protection device includes a first check valve (1), a second check valve (2), an oil reservoir (3), a hand valve (4), and a first normally closed solenoid valve (5); the input end of the first check valve (1) is connected to the oil supply pipe, and the output end of the first check valve (1) is directly connected to the oil inlet of the booster; the input end of the second check valve (2) is connected to the oil supply pipe, and the output end of the second check valve (2) is connected to the input end of the oil reservoir (3); the output end of the oil reservoir (3) is connected to the input end of the hand valve (4), the output end of the hand valve (4) is connected to the input end of the first normally closed solenoid valve (5), and the output end of the first normally closed solenoid valve (5) is connected to the oil inlet of the booster.

3. The device for automatic power failure protection of a booster test bench according to claim 2, characterized in that: The input end of the first check valve (1) and the input end of the second check valve (2) are connected in parallel on the same section of the oil supply pipe, and the output end of the first check valve (1) and the output end of the first normally closed solenoid valve (5) converge to the oil inlet of the booster.

4. The device for automatic power failure protection of a booster test bench according to claim 2, characterized in that: The hand valve (4) and the first normally closed solenoid valve (5) are connected in series along the oil supply direction from the oil storage tank (3) to the oil inlet of the booster, forming an independent branch pipeline for supplying oil from the oil storage tank (3) to the oil inlet of the booster.

5. The device for automatic power failure protection of a booster test bench according to claim 1, characterized in that: The air circuit protection device includes a second normally closed solenoid valve (6) and a pneumatic shut-off valve (7); the output end of the second normally closed solenoid valve (6) is connected to the control end of the pneumatic shut-off valve (7), and the valve body of the pneumatic shut-off valve (7) is connected in series to the air supply line of the booster.

6. The device for automatic power failure protection of a booster test bench according to claim 5, characterized in that: The pneumatic shut-off valve (7) is installed in the air supply pipeline between the air inlet end of the air supply pipeline and the compressor end of the booster. It is used to cut off the air supply from the air supply pipeline to the compressor end of the booster when the power is off, or to open the air supply path during normal testing.

Images