Emergency engine continuous starting test environment simulation device and test method

Abstract

The invention provides an emergency engine continuous starting test environment simulation device and a test method. The emergency engine continuous starting test environment simulation device comprises a refrigeration system, an air supply system, a lubricating oil cooling system and a cooling water cooling system. The refrigerating system comprises a refrigerant supply structure, a first heat exchanger, a second heat exchanger and a third heat exchanger. The first heat exchanger is arranged in the air supply system so as to cool air supplied to the emergency engine by the air supply system, so that the external air temperature during cold start of the emergency engine is simulated; the second heat exchanger is arranged in the lubricating oil cooling system, so that lubricating oil in a lubricating oil path of the emergency engine is cooled, and the lubricating oil state during cold start of the emergency engine is simulated; and the third heat exchanger is arranged in the cooling water cooling system, so that cooling water in a cooling water path of the emergency engine is cooled, and the cooling water state during cold start of the emergency engine is simulated.

Description

Technical Field

[0001] The present invention relates to the technical field of engine testing, and in particular to an emergency engine continuous starting test environment simulation device and a test method. Background Art

[0002] Emergency generator sets are important backup power sources for many critical infrastructures and emergency systems. Emergency engines are important components of emergency generator sets. Generally, emergency engines are diesel engines. In emergency situations such as main power failure and power grid failure, the emergency engine must be started in time and provide continuous power supply to important equipment to ensure the normal operation of the system. It is widely used in important places such as high-power ship backup power generation, nuclear power plants, hospitals, and telecommunications base stations. The rapid response, low-temperature starting success rate, high back pressure and high vacuum continuous starting operation of emergency engines are a strong guarantee for the normal operation of these important places. In order to ensure the reliability of use, the starting ability assessment test of emergency engines is required in various stages of production and development, and delivery. Among the existing engine performance tests, the continuous starting test is an important means to evaluate the engine starting ability and its reliability. Emergency engines for power generation have special requirements for the continuous starting ability of engine generator sets due to the particularity of their use environment:

[0003] 1) After starting, the engine must run at rated speed (not idling);

[0004] 2) Emergency engines are suitable for starting and running in extreme cold weather, high altitude or large intake vacuum conditions, such as low intake temperature (sub-zero) and low intake pressure;

[0005] 3) The number of continuous starting times required is relatively high, generally more than several hundred times, so air replenishment is allowed during the starting process.

[0006] 4) After each start, a step load is performed to achieve the oil-water temperature under the load specified in the emergency engine manual.

[0007] The existing engine starting test equipment is relatively simple and cannot fully simulate the various complex conditions of emergency engines for power generation, especially the actual use of diesel engines in the light environment, such as cold state low temperature starting (sub-zero temperature), and rapid cooling after successful starting to ensure test continuity. Therefore, the existing starting test equipment is difficult to meet the continuous starting performance assessment requirements of emergency engines. Summary of the invention

[0008] The purpose of the present invention is to provide an emergency engine continuous starting test environment simulation device, which can improve the technical problem that the existing starting test device is difficult to meet the continuous starting performance assessment requirements of the emergency engine.

[0009] Another object of the present invention is to provide an emergency engine continuous starting test method, which can improve the technical problem that the existing starting test device is difficult to meet the continuous starting performance assessment requirements of the emergency engine.

[0010] The embodiments of the present invention can be implemented in the following ways:

[0011] An emergency engine continuous starting test environment simulation device, the emergency engine continuous starting test environment simulation device comprising:

[0012] A refrigeration system, the refrigeration system comprising a refrigerant supply structure, a first heat exchanger, a second heat exchanger and a third heat exchanger, the refrigerant supply structure being used to supply refrigerant to the first heat exchanger, the second heat exchanger and the third heat exchanger;

[0013] an air supply system, the air supply system being used to supply air to the emergency engine, the first heat exchanger being arranged in the air supply system and being used to cool the air so as to simulate the outside air temperature during the cold start of the emergency engine;

[0014] a lubricating oil cooling system, the lubricating oil cooling system being connected to the lubricating oil circuit of the emergency engine, and the second heat exchanger being arranged in the lubricating oil cooling system for cooling the lubricating oil to simulate the lubricating oil state during cold start of the emergency engine; and

[0015] A cooling water cooling system, wherein the cooling water cooling system is used to communicate with the cooling water circuit of the emergency engine, and the third heat exchanger is arranged in the cooling water cooling system to cool the cooling water to simulate the cooling water state during the cold start of the emergency engine.

[0016] Optionally, the air supply system includes a first air supply branch, a second air supply branch and an air supply main line, the air supply main line is used to connect with the air intake manifold of the emergency engine, and the outlets of the first air supply branch and the second air supply branch are both connected with the air supply main line, so that the air in the first air supply branch and the second air supply branch can be mixed in the air supply main line and then enter the air intake manifold; the first heat exchanger is arranged on the first air supply branch to cool the air passing through the first air supply branch; the second air supply branch is used to supply air from the external environment to the air supply main line.

[0017] Optionally, a first pressure regulating valve is further provided on the second air supply branch, and the first pressure regulating valve is used to adjust the air flow supplied by the second air supply branch to the main air supply line.

[0018] Optionally, a second pressure regulating valve is provided on the main gas supply line, and the second pressure regulating valve is used to control the gas supply pressure of the main gas supply line.

[0019] Optionally, a first temperature sensor and a pressure sensor are also provided on the main air supply line, the first temperature sensor is used to detect the air temperature supplied from the main air supply line to the intake manifold; the pressure sensor is used to detect the air pressure supplied from the main air supply line to the intake manifold.

[0020] Optionally, the lubricating oil cooling system has a cooling circuit, a fourth heat exchanger and a lubricating oil circuit, the inlet and outlet of the lubricating oil circuit are respectively used to communicate with the lubricating oil circuit to guide the lubricating oil in the lubricating oil circuit out of the emergency engine; the second heat exchanger is arranged on the cooling circuit and is used to cool the cooling medium in the cooling circuit, and the cooling circuit is used to supply cooling medium to the fourth heat exchanger; the fourth heat exchanger is arranged on the lubricating oil circuit and is used to cool the lubricating oil in the lubricating oil circuit by the cooling medium.

[0021] Optionally, the lubricating oil circuit includes a lubricating oil inlet pipeline, a first lubricating oil branch, a second lubricating oil branch and a lubricating oil return pipeline, the inlet of the lubricating oil inlet pipeline is used to communicate with the lubricating oil circuit, the first lubricating oil branch and the second lubricating oil branch are arranged in parallel between the lubricating oil inlet pipeline and the lubricating oil return pipeline, and the first lubricating oil branch, the second lubricating oil branch and the lubricating oil return pipeline are connected through a first temperature regulating valve; the fourth heat exchanger is arranged on the first lubricating oil branch; the outlet of the lubricating oil return pipeline is used to communicate with the lubricating oil circuit.

[0022] Optionally, the lubricating oil circuit is further provided with a first pre-supply pump, and the first pre-supply pump is used to pump the lubricating oil in the lubricating oil circuit into the lubricating oil circuit.

[0023] Optionally, the cooling water cooling system includes an inlet pipe, a first cooling water branch, a second cooling water branch and a return pipe, the inlet of the inlet pipe is used to communicate with the cooling water pipe, the first cooling water branch and the second cooling water branch are arranged in parallel between the inlet pipe and the return pipe, and the first cooling water branch, the second cooling water branch and the return pipe are connected through a second temperature control valve; the third heat exchanger is arranged on the first cooling water branch; the outlet of the return pipe is used to communicate with the cooling water pipe.

[0024] Optionally, a second pre-supply pump is provided on the water inlet pipeline, and the second pre-supply pump is used to pump the cooling water in the cooling water circuit into the water inlet pipeline.

[0025] An emergency engine continuous starting test method is implemented by using the above-mentioned emergency engine continuous starting test environment simulation device; the emergency engine continuous starting test method comprises:

[0026] Controlling the refrigerant supply structure to supply refrigerant to the first heat exchanger, and controlling the air supply system to supply air that meets preset conditions to the emergency engine;

[0027] After the air supplied by the air supply system to the emergency engine meets the preset condition, determining whether the emergency engine meets the vehicle standby condition;

[0028] If the emergency engine meets the vehicle standby condition, the emergency engine is started and controlled to stop after it runs stably;

[0029] After the emergency engine is shut down, the lubricating oil cooling system is controlled to operate, and the lubricating oil temperature in the emergency engine is cooled to a first preset value; at the same time, the cooling water cooling system is controlled to operate, and the cooling water temperature in the emergency engine is cooled to a second preset value;

[0030] After the lubricating oil temperature reaches a first preset value and the cooling water temperature cools to a second preset value, the emergency engine is started and controlled to stop after it runs stably;

[0031] The cycle continues until the emergency engine reaches the start number.

[0032] The beneficial effects of the emergency engine continuous start test environment simulation device and test method provided by the embodiments of the present invention include:

[0033] An embodiment of the present invention provides an emergency engine continuous start test environment simulation device, which includes a refrigeration system, an air supply system, a lubricating oil cooling system, and a cooling water cooling system. The refrigeration system includes a refrigerant supply structure, a first heat exchanger, a second heat exchanger, and a third heat exchanger, and the refrigerant supply structure is used to supply refrigerant to the first heat exchanger, the second heat exchanger, and the third heat exchanger. The first heat exchanger is arranged in the air supply system to cool the air supplied by the air supply system to the emergency engine to simulate the outside air temperature during the cold start of the emergency engine; the second heat exchanger is arranged in the lubricating oil cooling system to cool the lubricating oil in the lubricating oil circuit of the emergency engine to simulate the lubricating oil state during the cold start of the emergency engine; the third heat exchanger is arranged in the cooling water cooling system to cool the cooling water in the cooling water circuit of the emergency engine to simulate the cooling water state during the cold start of the emergency engine. The emergency engine continuous starting test environment simulation device provided by the present invention can fully simulate the real working environment of the emergency engine during cold starting by cooling the emergency engine intake, lubricating oil and cooling water in the emergency engine respectively, and quickly reduce the temperature of the lubricating oil and cooling water before each start of the emergency engine, thereby ensuring the rapid and stable progress of the continuous starting test and meeting the test consistency requirements.

[0034] An embodiment of the present invention also provides a method for continuous starting test of an emergency engine, which is carried out using the above-mentioned emergency engine continuous starting test environment simulation device. Therefore, it can fully simulate the real working environment of the emergency engine during cold start, and quickly reduce the temperature of the lubricating oil and cooling water before each start of the emergency engine, thereby ensuring the rapid and stable progress of the continuous starting test and meeting the beneficial effect of test consistency requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The above features and advantages of the present invention can be better understood after reading the detailed description of the embodiments of the present disclosure in conjunction with the following drawings. In the drawings, the components are not necessarily drawn to scale, and components with similar related properties or features may have the same or similar reference numerals.

[0036] Figure 1 It shows a schematic structural diagram of an emergency engine continuous starting test environment simulation device provided according to one aspect of the present invention;

[0037] Figure 2 A flow chart of an emergency engine continuous starting test method provided according to one aspect of the present invention is shown;

[0038] Figure 3 A schematic structural diagram of an emergency engine continuous starting test system provided according to one aspect of the present invention is shown.

[0039] 10-Emergency engine continuous start test system; 100-Emergency engine continuous start test environment simulation device; 110-Refrigeration system; 111-Refrigerant supply structure; 112-First heat exchanger; 113-Second heat exchanger; 114-Third heat exchanger; 120-Air supply system; 121-First air supply branch; 122-Second air supply branch; 123-First pressure regulating valve; 124-Second pressure regulating valve; 125-First temperature sensor; 126-Pressure sensor; 127-Main air supply line; 130-Lubricating oil cooling system; 131-Cooling circuit; 132-water replenishment port; 133-fourth heat exchanger; 134-lubricating oil circuit; 135-lubricating oil inlet pipeline; 136-first lubricating oil branch; 137-second lubricating oil branch; 138-lubricating oil return pipeline; 139-first thermostatic valve; 141-first pre-supply pump; 142-second temperature sensor; 150-cooling water cooling system; 151-water inlet pipeline; 152-first cooling water branch; 153-second cooling water branch; 154-second thermostatic valve; 155-return pipeline; 156-second pre-supply pump; 157-third temperature sensor;

[0040] 200-starting system; 211-starting motor; 212-air compressor; 213-one-way stop valve; 214-filter; 215-gas cylinder; 216-stop valve;

[0041] 20-Emergency engine. DETAILED DESCRIPTION

[0042] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. Note that the aspects described below in conjunction with the accompanying drawings and specific embodiments are only exemplary and should not be construed as limiting the scope of protection of the present invention in any way.

[0043] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", "vertical" and the like appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, or is the orientation or position relationship in which the product of the invention is usually placed when used, rather than indicating or implying that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0044] At the same time, it should be noted that the terms "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0045] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified or limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, an integral connection, or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or the internal communication of two components, etc. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] Figure 1 This is a schematic diagram of the structure of the emergency engine continuous start test environment simulation device 100 provided in this embodiment. Figure 1The present embodiment provides an emergency engine continuous start test environment simulation device 100, which includes a refrigeration system 110, an air supply system 120, a lubricating oil cooling system 130, and a cooling water cooling system 150. The refrigeration system 110 includes a refrigerant supply structure 111, a first heat exchanger 112, a second heat exchanger 113, and a third heat exchanger 114. The refrigerant supply structure 111 is used to supply refrigerant to the first heat exchanger 112, the second heat exchanger 113, and the third heat exchanger 114. The first heat exchanger 112 is arranged in the air supply system 120, so as to cool the air supplied by the air supply system 120 to the emergency engine 20, so as to simulate the outside air temperature when the emergency engine 20 is cold started; the second heat exchanger 113 is arranged in the lubricating oil cooling system 130, so as to cool the lubricating oil in the lubricating oil circuit of the emergency engine 20, so as to simulate the lubricating oil state when the emergency engine 20 is cold started; the third heat exchanger 114 is arranged in the cooling water cooling system 150, so as to cool the cooling water in the cooling water circuit of the emergency engine 20, so as to simulate the cooling water state when the emergency engine 20 is cold started. The emergency engine continuous starting test environment simulation device 100 provided by the present invention can fully simulate the real working environment of the emergency engine 20 during cold starting by cooling the intake air of the emergency engine 20, the lubricating oil and the cooling water in the emergency engine 20 respectively, and quickly reduce the temperature of the lubricating oil and the cooling water before each start of the emergency engine 20, so as to ensure the rapid and stable progress of the continuous starting test and meet the test consistency requirements.

[0047] The emergency engine continuous starting test environment simulation device 100 provided in this embodiment is further described below:

[0048] Please continue to refer to Figure 1 In this embodiment, the refrigeration system 110 includes a refrigerant supply structure 111, a first heat exchanger 112, a second heat exchanger 113 and a third heat exchanger 114. The refrigerant supply structure 111, the first heat exchanger 112, the second heat exchanger 113 and the third heat exchanger 114 form a refrigerant circuit. The refrigerant in the refrigerant supply structure 111 passes through the first heat exchanger 112, the second heat exchanger 113 and the third heat exchanger 114 and then returns to the refrigerant supply structure 111. The total cooling capacity Q required for the refrigerant provided by the refrigerant supply structure 111 is:

[0049] Q=(Q1+Q2+Q3)*η

[0050] Wherein, Q1 is the heat exchange capacity of the first heat exchanger 112; Q2 is the heat exchange capacity of the second heat exchanger 113; Q3 is the heat exchange capacity of the third heat exchanger 114; η is the heat exchange capacity calculation margin. Optionally, η can be 1.2 to 1.5.

[0051] Optionally, the first heat exchanger 112, the second heat exchanger 113 and the third heat exchanger 114 are arranged in series, and the first heat exchanger 112, the second heat exchanger 113 and the third heat exchanger 114 are arranged sequentially in a direction away from the refrigerant supply structure 111, so that the refrigerant in the refrigerant supply structure 111 passes through the first heat exchanger 112, the second heat exchanger 113 and the third heat exchanger 114 sequentially and then returns to the refrigerant supply structure 111. In other words, during the operation of the refrigeration system 110, the refrigerant sequentially exchanges heat in the first heat exchanger 112, the second heat exchanger 113 and the third heat exchanger 114. It can be understood that in some other embodiments, the first heat exchanger 112, the second heat exchanger 113 and the third heat exchanger 114 can also be arranged in a parallel structure.

[0052] In this embodiment, the air supply system 120 includes a first air supply branch 121, a second air supply branch 122 and a main air supply line 127. The main air supply line 127 is used to communicate with the air intake manifold of the emergency engine 20. The outlets of the first air supply branch 121 and the second air supply branch 122 are both connected to the main air supply line 127, so that the air in the first air supply branch 121 and the second air supply branch 122 are mixed in the main air supply line 127 and then enter the air intake manifold. The first heat exchanger 112 is arranged on the first air supply branch 121 to cool the air passing through the first air supply branch 121. The second air supply branch 122 is used to supply air in the external environment to the main air supply line.

[0053] Specifically, the first air supply branch 121 and the second air supply branch 122 are arranged in parallel, and the second air supply branch 122 is directly connected to the main air supply path 127, so the second air supply branch 122 introduces air with a temperature of t1 in the external environment into the main air supply path 127. Since the first heat exchanger 112 is arranged on the first air supply branch 121, the air in the first air supply branch 121 is introduced into the main air supply path 127 after the temperature drops from t1 to t2 under the action of the first heat exchanger 112. The air with a temperature of t2 from the first air supply branch 121 and the air with a temperature of t1 from the second air supply branch 122 are mixed in the main air supply path 127 to obtain air with a temperature of t3, and the main air supply path 127 supplies the air with a temperature of t3 to the emergency engine 20 as fresh air for the operation of the emergency engine 20. The heat exchange capacity Q1 of the first heat exchanger 112 is:

[0054] Q1=C 空气 *q2*(t1-t2)

[0055] q3=q1+q2

[0056] q1*(t1-t3)=q2*(t3-t2)

[0057] Among them, C 空气is the specific heat capacity of air; q1 is the air flow rate in the second air supply branch 122; q2 is the air flow rate in the first air supply branch 121; q3 is the flow rate in the main air supply path 127.

[0058] Optionally, in this embodiment, the air supply system 120 further includes an air intake main path, the inlet of the air intake main path is connected to the atmosphere, and the outlet of the air intake main path is connected to the first air supply branch pipe and the second air supply branch pipe. During operation, the air intake main path inhales air from the atmosphere, and then part of the air in the air intake main path enters the first air supply branch pipe, and the other part enters the second air supply branch pipe.

[0059] Furthermore, a first pressure regulating valve 123 is also provided on the second air supply branch 122, and the first pressure regulating valve 123 is used to adjust the air flow rate supplied from the second air supply branch 122 to the air supply main path 127. The air flow rate supplied from the second air supply branch 122 to the air supply main path 127 is adjusted by the first pressure regulating valve 123, thereby changing the air supply flow rate ratio between the first air supply branch 121 and the second air supply branch 122, and then adjusting the specific value of the air t3 in the air supply main path 127, so as to ensure that the air temperature supplied by the air supply system 120 to the emergency engine 20 is the required temperature.

[0060] Furthermore, a second pressure regulating valve 124 is provided on the main gas supply path 127, and the second pressure regulating valve 124 is used to control the gas supply pressure of the main gas supply path 127. When the continuous starting test simulates a low-pressure environment, the pressure regulating valve can be used to adjust the pressure, change the intake volume q3, and thus adjust the intake vacuum degree of the intake pressure.

[0061] In this embodiment, the main air supply path 127 is further provided with a first temperature sensor 125 and a pressure sensor 126. The first temperature sensor 125 is used to detect the temperature of the air supplied to the air intake manifold by the main air supply path 127; the pressure sensor 126 is used to detect the pressure of the air supplied to the air intake manifold by the main air supply path 127. Specifically, the first temperature sensor 125 and the pressure sensor 126 are arranged near the outlet of the main air supply path 127, that is, the first temperature sensor 125 and the pressure sensor 126 are arranged near the air intake manifold of the emergency engine 20, so as to ensure that the temperature and pressure of the air entering the air intake manifold are relatively consistent with the data measured by the first temperature sensor 125 and the pressure sensor 126.

[0062] Before the test, the air temperature in the main air supply path 127 can be obtained through the first temperature sensor 125. If the air temperature in the main air supply path 127 is inconsistent with the preset air temperature, the pressure of the second air supply branch 122 can be adjusted through the first pressure regulating valve 123, thereby changing the air temperature in the main air supply path 127 until the demand is met. Similarly, the air pressure in the main air supply path 127 can be obtained through the pressure sensor 126. If the air pressure in the main air supply path 127 is inconsistent with the preset air pressure, the pressure of the main air supply path 127 can be adjusted through the second pressure regulating valve 124 until the demand is met.

[0063] In this embodiment, the lubricating oil cooling system 130 has a cooling circuit 131, a fourth heat exchanger 133, and a lubricating oil circuit 134. The inlet and outlet of the lubricating oil circuit 134 are respectively used to communicate with the lubricating oil circuit of the emergency engine 20, so that the lubricating oil in the lubricating oil circuit is led out of the emergency engine 20. It should be noted that although the lubricating oil circuit 134 is provided in the embodiment of the present invention, the lubricating oil circuit 134 is to meet the lubricating oil cooling before starting during the continuous starting test of the emergency engine 20. The lubricating oil circuit 134 is external to the emergency engine 20. During the normal operation of the emergency engine 20, the lubricating oil circulates through the lubricating oil circuit of the emergency engine 20 itself, and does not need to enter the lubricating oil circuit 134.

[0064] The second heat exchanger 113 is arranged on the cooling circuit 131 and is used to cool the cooling medium in the cooling circuit 131. The cooling circuit 131 is used to supply cooling water to the fourth heat exchanger 133. The fourth heat exchanger 133 is arranged on the lubricating oil circuit 134 and is used to cool the lubricating oil in the lubricating oil circuit 134 through the cooling medium. Specifically, the cooling of the lubricating oil in this embodiment is achieved through two-stage cooling. The heat exchange of the second heat exchanger 113 is the first stage heat exchange, and the heat exchange of the fourth heat exchanger 133 is the second stage heat exchange, that is, in this embodiment, the refrigerant provided by the cooling system does not directly cool the lubricating oil. Optionally, in this embodiment, the cooling circuit 131 has a water replenishment port 132, and the cooling medium enters the cooling circuit 131 through the water replenishment port 132.

[0065] Furthermore, the lubricating oil circuit 134 is also provided with a first pre-supply pump 141, which is used to pump lubricating oil into the lubricating oil circuit 134. Specifically, before the emergency engine 20 is started, the lubricating oil can be pumped out of the lubricating oil circuit 134 by the first pre-supply pump 141, so that the lubricating oil passes through the fourth heat exchanger 133 for cooling.

[0066] The lubricating oil cooling system 130 can achieve rapid cooling of the lubricating oil, thereby ensuring that in the continuous start test, the lubricating oil temperature and pressure range before each start are the same (due to the viscosity-temperature effect, the lubricating oil pressure is affected by the lubricating oil temperature), meeting the consistency requirements of the test, and accelerating the continuous start test process. During the lubricating oil cooling process, the refrigerant supplied by the refrigerant supply structure 111 cools the cooling medium in the cooling circuit 131 in the second heat exchanger 113, and the temperature of the cooling medium drops from t4 to t5. At this time, the heat exchange amount of the refrigerant to the cooling medium in the second heat exchanger 113 is Q2. The cooling medium cooled in the second heat exchanger 113 enters the fourth heat exchanger 133, and cools the lubricating oil in the fourth heat exchanger 133. At this time, the heat exchange amount of the lubricating oil is Q4.

[0067] Furthermore, the lubricating oil circuit 134 includes a lubricating oil inlet pipeline 135, a first lubricating oil branch 136, a second lubricating oil branch 137, and a lubricating oil return pipeline 138. The inlet of the lubricating oil inlet pipeline 135 is used to communicate with the lubricating oil circuit of the emergency engine 20, the first lubricating oil branch 136 and the second lubricating oil branch 137 are arranged in parallel between the lubricating oil inlet pipeline 135 and the lubricating oil outlet pipeline, and the first lubricating oil branch 136, the second lubricating oil branch 137 and the lubricating oil return pipeline 138 are connected through the first thermostatic valve 139, and the fourth heat exchanger 133 is arranged on the first lubricating oil branch 136. The outlet of the lubricating oil return pipeline 138 is used to communicate with the lubricating oil circuit.

[0068] Specifically, the first pre-supply pump 141 is arranged on the lubricating oil inlet pipeline 135. The inlet of the lubricating oil inlet pipeline 135 is the inlet of the lubricating oil circuit 134, and the outlet of the lubricating oil return pipeline 138 is the outlet of the lubricating oil circuit 134. Under the action of the first pre-supply pump 141, the lubricating oil in the lubricating oil circuit enters the lubricating oil circuit 134 from the inlet of the lubricating oil inlet pipeline 135, and after being cooled to the required temperature in the lubricating oil circuit 134, it returns to the lubricating oil circuit of the emergency engine 20 from the outlet of the lubricating oil return pipeline 138. Since the first lubricating oil branch 136 and the second lubricating oil branch 137 are arranged in parallel between the lubricating oil inlet pipeline 135 and the lubricating oil return pipeline 138, a part of the lubricating oil entering the lubricating oil return pipeline 138 from the lubricating oil circuit enters the first lubricating oil branch 136, and the other part enters the second lubricating oil branch 137. The fourth heat exchanger 133 is arranged on the first lubricating oil branch 136. The temperature of the lubricating oil entering the first lubricating oil branch 136 drops from t6 to t7 under the action of the fourth heat exchanger 133, while the lubricating oil in the second lubricating oil branch 137 maintains the temperature t6 and enters the lubricating oil return pipeline 138. In other words, the lubricating oil in the lubricating oil return pipeline 138 is a mixture of part of the lubricating oil with a temperature of t7 and part of the lubricating oil with a temperature of t6, and the temperature thereof is t8.

[0069] Since the first lubricating oil branch 136, the second lubricating oil branch 137 and the lubricating oil return pipeline 138 are connected through the first temperature regulating valve 139, the ratio of the lubricating oil from the first lubricating oil branch 136 and the second lubricating oil branch 137 entering the lubricating oil return pipeline 138 can be adjusted by controlling the first temperature regulating valve 139, and then the lubricating temperature in the lubricating oil return pipeline 138 is adjusted to ensure that the lubricating oil temperature t8 in the lubricating oil return pipeline 138 reaches the required temperature value. Furthermore, a second temperature sensor 142 is also provided on the lubricating oil return pipeline, and the lubricating oil temperature in the lubricating oil return pipeline 138 is detected by the second temperature sensor 142, that is, the specific value of the temperature t8 is obtained. If t8 does not reach the required temperature value, it can be controlled by controlling the first temperature regulating valve 139.

[0070] Thus, the heat exchange amount in the lubricating oil cooling system 130 is:

[0071] Q2=C 冷却介质 *q4*(t4-t5)

[0072] Q4=C 滑油 *q7*(t6-t7)

[0073] q6=q7+q8

[0074] q7*(t8-t7)=q8*(t6-t8)

[0075] Among them, C 冷却介质 is the specific heat capacity of the cooling medium; C 滑油 is the specific heat capacity of the lubricating oil; q4 is the flow rate of the cooling medium in the cooling circuit 131; q6 is the flow rate of the lubricating oil in the lubricating oil inlet pipeline 135 and the lubricating oil return pipeline 138; q7 is the flow rate of the lubricating oil passing through the first lubricating oil branch 136; q8 is the flow rate of the lubricating oil passing through the second lubricating oil branch 137.

[0076] In this embodiment, the cooling water cooling system 150 includes an inlet pipe 151, a first cooling water branch 152, a second cooling water branch 153 and a return pipe 155. The inlet of the inlet pipe 151 is used to communicate with the cooling water circuit, and the first cooling water branch 152 and the second cooling water branch 153 are arranged in parallel between the inlet pipe 151 and the return pipe 155, so that part of the cooling water entering the inlet pipe 151 enters the first cooling water branch 152, and the other part enters the second cooling water branch 153. The third heat exchanger 114 is arranged on the first cooling water branch 152, so that the temperature of the cooling water entering the first cooling water branch 152 is reduced from t9 to t10 under the action of the third heat exchanger 114. 11 ; The cooling water entering the second cooling water branch 153 maintains the temperature t9 in the water inlet pipe 151 and flows into the return water pipe 155.

[0077] The cooling water in the first cooling water branch 152 has a temperature of t 11 The cooling water with a temperature of t9 in the second cooling water branch 153 is mixed in the return water pipeline 155 to obtain a temperature of t 12 The outlet of the return water pipeline 155 is connected to the cooling water path, so that the mixed cooling water is sent back to the cooling water path of the emergency engine 20. Furthermore, a second pre-supply pump 156 is provided on the water inlet pipeline 151, and the second pre-supply pump 156 is used to pump the cooling water in the cooling water path of the emergency engine 20 into the water inlet pipeline 151, so that the cooling water flows along the cooling water cooling system 150. Specifically, before the emergency engine 20 is started, the cooling water can be pumped out of the cooling water path by the second pre-supply pump 156, so that it passes through the third heat exchanger 114 for cooling.

[0078] The cooling water cooling system 150 can realize rapid cooling of the cooling water, ensure that the cooling water temperature range before each start is the same, meet the consistency requirements of the continuous start test, and accelerate the continuous start test process. It should be noted that although the water inlet pipeline 151, the first cooling water branch 152, the second cooling water branch 153 and the return water pipeline 155 provided in the embodiment of the present invention can form a loop connected to the cooling water circuit of the emergency engine 20, the loop is to meet the cooling of the cooling water before starting during the continuous start test of the emergency engine 20. The cooling water cooling system 150 is external to the emergency engine 20. During the normal operation of the emergency engine 20, the cooling water circulates through the cooling water circuit of the emergency engine 20 itself without entering the cooling water cooling system 150.

[0079] The first cooling water branch 152, the second cooling water branch 153 and the return water pipeline 155 are connected through the second temperature regulating valve 154. Thus, the mixing ratio of the first cooling water branch 152 and the second cooling water branch 153 can be adjusted by controlling the second temperature regulating valve 154, thereby adjusting the temperature of the cooling water in the return water pipeline 155. Furthermore, a third temperature sensor 157 is provided on the return water pipeline 155. The third temperature sensor 157 can detect the temperature of the cooling water in the return water pipeline 155, thereby obtaining t 12 If t 12 If the required temperature value is not reached, the second temperature regulating valve 154 can be controlled.

[0080] Thus, the heat exchange amount Q2 in the cooling water cooling system 150 is:

[0081] Q3=C 冷却水 *q 11 *(t9-t 11 )

[0082] q 12=q 11 +q 10

[0083] q9=q 12

[0084] q 10 *(t9-t 12 )=q 11 *(t 12 -t 11 )

[0085] Wherein, q9 is the cooling water flow rate entering the water inlet pipeline 151; q 10 is the flow rate of the second cooling water branch 153; q 11 is the flow rate of the first cooling water branch 152; q 12 is the cooling water flow rate of the return pipe 155.

[0086] The emergency engine continuous start test environment simulation device 100 provided in an embodiment of the present invention fully simulates the actual working environment conditions of the emergency engine 20 by introducing the cooling adjustment of the refrigeration system 110, the air supply system 120, the lubricating oil cooling system 130 and the cooling water cooling system 150 into the continuous start test, thereby solving the problem that the continuous start assessment process of the emergency engine 20 before scientific research, production or delivery cannot accurately simulate the environmental assessment requirements, and increases the accuracy and adequacy of the test verification.

[0087] Figure 2 The flowchart of the emergency engine continuous starting test method provided in this embodiment is as follows: Figure 3 This is a schematic diagram of the structure of the emergency engine continuous starting test system 10 provided in this embodiment. Figure 1-Figure 3 This embodiment also provides an emergency engine continuous starting test method, which is implemented by using the emergency engine continuous starting test environment simulation device 100. When the emergency engine 20 continuous starting test is applied in the emergency engine 20 continuous starting test, the following is formed: Figure 3 The emergency engine continuous starting test system 10 is shown.

[0088] In this embodiment, the emergency engine continuous starting test system 10 includes an emergency engine 20 and the above-mentioned emergency engine continuous starting test environment simulation device 100, and the emergency engine continuous starting test system 10 also includes a starting system 200. It should be noted that before the emergency engine 20 is continuously started, the emergency engine continuous starting test environment simulation device 100 needs to be connected to the emergency engine 20 by pipeline. When the pipeline connection of the air supply system 120 is performed, the diesel engine supercharger end needs to be adapted and modified. Specifically, for the indoor naturally aspirated diesel engine supercharger, the compressor end muffler should be removed and connected to the intake pipe; for the pipeline intake diesel engine, the intake pipe is directly connected to the air supply system 120 to simulate the test environment temperature. The lubricating oil circuit is connected to the lubricating oil cooling system 130 by pipeline, and the cooling water circuit is connected to the cooling water cooling system 150 by pipeline.

[0089] The starting system 200 includes a starting motor 211, and the emergency engine 20 is started by the starting motor 211. Optionally, the starting motor 211 can be a pneumatic motor or an electric motor. Figure 3 The structure of the starting system 200 is shown when the starting motor 211 is a pneumatic motor. In this case, the starting system 200 further includes an air compressor 212, a one-way stop valve 213, a filter 214, a gas cylinder 215 and a stop valve 216 which are arranged in sequence.

[0090] In this embodiment, the emergency engine continuous starting test method includes the following steps:

[0091] S01: Control the refrigerant supply structure 111 to supply refrigerant to the first heat exchanger 112, and control the air supply system 120 to supply air that meets preset conditions to the emergency engine 20.

[0092] Before the emergency engine 20 formally performs the continuous starting test, preparation work needs to be performed, and the preparation work includes the process of executing step S01. Specifically, the preset conditions include preset temperature conditions and preset pressure conditions, so when the air supply system 120 is controlled, the process of adjusting the intake temperature and the process of adjusting the intake pressure are included.

[0093] Before controlling the operation of the refrigeration system 110, it is necessary to ensure that the refrigeration system 110 can meet the heat exchange requirements of the first heat exchanger 112, the second heat exchanger 113 and the third heat exchanger 114. Therefore, it is necessary to calculate the cooling capacity of the refrigerant in the refrigeration system 110 according to the heat exchange rates of the intake air temperature, the lubricating oil temperature and the cooling water temperature according to the assessment requirements of the continuous start-up test, thereby completing the preparation of the refrigerant in the refrigeration system 110 and realizing the debugging of the refrigeration system 110.

[0094] In the present embodiment, the first heat exchanger 112, the second heat exchanger 113 and the third heat exchanger 114 in the refrigeration system 110 are arranged in series. Therefore, when the refrigerant supply structure 111 supplies refrigerant to the first heat exchanger 112, the refrigerant will simultaneously pass through the second heat exchanger 113 and the third heat exchanger 114. During this preparation process, there is no need to cool the lubricating oil and the cooling water. Therefore, the first pre-supply pump 141 and the second pre-supply pump 156 are controlled to be in a shutdown state, and the refrigeration system 110 only needs to exchange heat with the first heat exchanger 112.

[0095] Specifically, the intake air temperature adjustment process includes: after controlling the operation of the refrigeration system 110, the refrigerant supplied by the refrigerant supply system passes through the first heat exchanger 112 to exchange heat with the air in the air supply system 120, and obtains the temperature value of the first temperature sensor 125. If the temperature value of the first temperature sensor 125 does not meet the preset temperature condition, the first pressure regulating valve 123 is adjusted until the temperature value detected by the first temperature sensor 125 meets the preset temperature condition.

[0096] The intake pressure regulation process includes: after the air supply system 120 completes temperature regulation, the emergency engine 20 is started normally and quickly loaded to the rated load, and then the pressure value detected by the pressure sensor 126 is obtained under the rated operating conditions. If the pressure value detected by the pressure sensor 126 does not meet the preset pressure condition, the second pressure regulating valve 124 is adjusted until the pressure value detected by the pressure sensor 126 meets the preset force requirement.

[0097] In this way, the temperature regulation and pressure regulation of the air supply system 120 are completed, and the air supply system 120 can supply air that meets the preset conditions to the emergency engine 20. At this time, the emergency engine 20 can be controlled to shut down, and the first pressure regulating valve 123 and the second pressure regulating valve 124 can be fixed at the current opening.

[0098] S02: Determine whether the vehicle preparation conditions are met.

[0099] Obtain the temperature of the lubricating oil and cooling water in the emergency engine 20, preheat the lubricating oil and cooling water normally to the temperature value specified by the manufacturer to complete the vehicle preparation. At this time, the vehicle preparation conditions are met and the emergency engine 20 can be continuously started. Test, so the preparation work also includes vehicle preparation work.

[0100] Obviously, when preparing the vehicle, in order to ensure that the emergency engine 20 can start smoothly, it is also necessary to prepare a power source according to the type of the starting motor 211 of the emergency engine 20. For example, if the starting motor 211 is a pneumatic motor, it is necessary to prepare a gas source such as a gas cylinder; if the starting motor 211 is an electric motor, it is necessary to prepare a power source such as a battery.

[0101] S03: After the emergency engine 20 is started and runs stably, the emergency engine 20 is controlled to stop.

[0102] After the preparation work is completed, the emergency engine 20 continuous test can be formally carried out. When carrying out the emergency engine 20 continuous test, the emergency engine 20 is first started to the rated speed, and after running at no load, a first-level step load is quickly added, and it is operated stably at this load condition point. It should be noted that the first-level step load is determined according to the value specified by the emergency engine 20 manufacturer.

[0103] After the emergency engine 20 runs stably, the emergency engine 20 is controlled to stop, and at this time, the emergency engine 20 completes the first start.

[0104] S04: Control the lubricating oil cooling system 130 to operate, so as to cool the lubricating oil temperature in the emergency engine 20 to a first preset value; at the same time, control the cooling water cooling system 150 to operate, and cool the cooling water temperature in the emergency engine 20 to a second preset value.

[0105] Specifically, the first pre-supply pump 141 is controlled to operate, so that the lubricating oil in the lubricating oil circuit of the emergency engine 20 is pumped into the lubricating oil circuit 134, and enters the first lubricating oil branch 136 and the second lubricating oil branch 137 along the lubricating oil inlet pipeline 135. The lubricating oil in the first lubricating oil branch 136 and the second lubricating oil branch 137 merge in the lubricating oil return pipeline 138 and are sent back to the emergency engine 20 through the lubricating oil return pipeline 138. When the lubricating oil flows in the first lubricating oil branch 136, it is heat exchanged and cooled by the fourth heat exchanger 133, so as to reduce the temperature of the lubricating oil entering the lubricating oil return pipeline 138 after merging. The temperature of the lubricating oil in the lubricating oil return pipeline 138 is obtained by the second temperature sensor 142. If the temperature value obtained by the second temperature sensor 142 does not reach the first preset value, the first temperature regulating valve 139 is adjusted to control the lubricating oil mixing ratio of the first lubricating oil branch 136 and the second lubricating oil branch 137 until the temperature value obtained by the second temperature sensor 142 reaches the first preset value.

[0106] At the same time, the second pre-supply pump 156 is controlled to operate, so that the cooling water in the cooling water circuit in the emergency engine 20 is pumped into the water inlet pipe 151, and flows in two ways along the first cooling water branch 152 and the second cooling water branch 153 to the return water pipe 155, and the cooling water in the first cooling water branch 152 and the second cooling water branch 153 are merged in the return water pipe 155 and then sent back to the emergency engine 20. During the flow of the cooling water in the first cooling water branch 152, the cooling water is heat exchanged and cooled by the third heat exchanger 114, so as to reduce the temperature of the lubricating oil entering the lubricating oil return pipe 138 after the merger. The cooling water temperature in the return water pipe 155 is obtained by the third temperature sensor 157. If the temperature value obtained by the third temperature sensor 157 does not reach the second preset value, the second temperature regulating valve 154 is adjusted to control the mixing ratio of the cooling water in the first cooling water branch 152 and the second cooling water branch 153, until the temperature value obtained by the third temperature sensor 157 reaches the second preset value.

[0107] S04: After the emergency engine 20 is started and runs stably, the emergency engine 20 is controlled to stop.

[0108] After completing step S03, that is, after the lubricating oil temperature reaches the first preset value and the cooling water temperature cools to the second preset value, the next emergency engine 20 can be started. When starting the emergency engine 20 this time, the first pre-supply pump 141 and the second pre-supply pump 156 should be closed, so that during the operation of the emergency engine 20, the lubricating oil of the emergency engine 20 circulates in the lubricating oil circuit and the cooling water circulates in the cooling water circuit.

[0109] S05: The operation is cyclically performed until the emergency engine 20 reaches the start number.

[0110] After executing step S04, if the emergency engine 20 has not reached the starting number, steps S03 and S04 are executed in a loop until the emergency engine 20 reaches the starting number, at which time the continuous starting test of the emergency engine 20 is completed.

[0111] It should be noted that, during the continuous starting test of the emergency engine 20 , the air supply system 120 operates while maintaining the openings of the first pressure regulating valve 123 and the second pressure regulating valve 124 determined in step S01 .

[0112] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technology in the field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. An emergency engine continuous starting test environment simulation device, characterized in that: The emergency engine continuous starting test environment simulation device comprises: A refrigeration system, the refrigeration system comprising a refrigerant supply structure, a first heat exchanger, a second heat exchanger and a third heat exchanger, the refrigerant supply structure being used to supply refrigerant to the first heat exchanger, the second heat exchanger and the third heat exchanger; an air supply system, the air supply system being used to supply air to the emergency engine, the first heat exchanger being arranged in the air supply system and being used to cool the air so as to simulate the outside air temperature during the cold start of the emergency engine; a lubricating oil cooling system, the lubricating oil cooling system being connected to the lubricating oil circuit of the emergency engine, and the second heat exchanger being arranged in the lubricating oil cooling system for cooling the lubricating oil to simulate the lubricating oil state during cold start of the emergency engine; and A cooling water cooling system, wherein the cooling water cooling system is used to communicate with the cooling water circuit of the emergency engine, and the third heat exchanger is arranged in the cooling water cooling system to cool the cooling water to simulate the cooling water state during the cold start of the emergency engine.

2. The emergency engine continuous starting test environment simulation device according to claim 1 is characterized in that: The air supply system comprises a first air supply branch, a second air supply branch and a main air supply line, wherein the main air supply line is used to communicate with the air intake manifold of the emergency engine, and the outlets of the first air supply branch and the second air supply branch are both communicated with the main air supply line, so that the air in the first air supply branch and the second air supply branch are mixed in the main air supply line and then enter the air intake manifold; the first heat exchanger is arranged on the first air supply branch to cool the air passing through the first air supply branch; The second air supply branch is used to supply air from the external environment to the main air supply path.

3. The emergency engine continuous starting test environment simulation device according to claim 2 is characterized in that: The second air supply branch is also provided with a first pressure regulating valve, and the first pressure regulating valve is used to adjust the air flow supplied from the second air supply branch to the main air supply path.

4. The emergency engine continuous starting test environment simulation device according to claim 2, characterized in that: The main gas supply line is provided with a second pressure regulating valve, and the second pressure regulating valve is used to control the gas supply pressure of the main gas supply line.

5. The emergency engine continuous starting test environment simulation device according to claim 2, characterized in that: The main air supply line is also provided with a first temperature sensor and a pressure sensor. The first temperature sensor is used to detect the temperature of the air supplied from the main air supply line to the intake manifold; the pressure sensor is used to detect the pressure of the air supplied from the main air supply line to the intake manifold.

6. The emergency engine continuous starting test environment simulation device according to claim 1, characterized in that: The lubricating oil cooling system comprises a cooling circuit, a fourth heat exchanger and a lubricating oil circuit, wherein the inlet and outlet of the lubricating oil circuit are respectively used to communicate with the lubricating oil circuit so as to guide the lubricating oil in the lubricating oil circuit out of the emergency engine; the second heat exchanger is arranged on the cooling circuit and is used to cool the cooling medium in the cooling circuit, and the cooling circuit is used to supply the cooling medium to the fourth heat exchanger; the fourth heat exchanger is arranged on the lubricating oil circuit and is used to cool the lubricating oil in the lubricating oil circuit by the cooling medium.

7. The emergency engine continuous starting test environment simulation device according to claim 6, characterized in that: The lubricating oil circuit includes a lubricating oil inlet pipeline, a first lubricating oil branch, a second lubricating oil branch and a lubricating oil return pipeline. The inlet of the lubricating oil inlet pipeline is used to communicate with the lubricating oil circuit. The first lubricating oil branch and the second lubricating oil branch are arranged in parallel between the lubricating oil inlet pipeline and the lubricating oil return pipeline, and the first lubricating oil branch, the second lubricating oil branch and the lubricating oil return pipeline are connected through a first temperature regulating valve; the fourth heat exchanger is arranged on the first lubricating oil branch; the outlet of the lubricating oil return pipeline is used to communicate with the lubricating oil circuit.

8. The emergency engine continuous starting test environment simulation device according to claim 6, characterized in that: The lubricating oil circuit is also provided with a first pre-supply pump, and the first pre-supply pump is used to pump the lubricating oil in the lubricating oil circuit into the lubricating oil circuit.

9. The emergency engine continuous starting test environment simulation device according to claim 1, characterized in that: The cooling water cooling system includes an inlet pipe, a first cooling water branch, a second cooling water branch and a return pipe, the inlet of the inlet pipe is used to communicate with the cooling water pipe, the first cooling water branch and the second cooling water branch are arranged in parallel between the inlet pipe and the return pipe, and the first cooling water branch, the second cooling water branch and the return pipe are connected through a second temperature regulating valve; the third heat exchanger is arranged on the first cooling water branch; the outlet of the return pipe is used to communicate with the cooling water pipe.

10. The emergency engine continuous starting test environment simulation device according to claim 9, characterized in that: The water inlet pipeline is provided with a second pre-supply pump, and the second pre-supply pump is used to pump the cooling water in the cooling water circuit into the water inlet pipeline.

11. An emergency engine continuous starting test method, characterized in that: The method is implemented by using the emergency engine continuous starting test environment simulation device as described in any one of claims 1 to 10; the emergency engine continuous starting test method comprises: Controlling the refrigerant supply structure to supply refrigerant to the first heat exchanger, and controlling the air supply system to supply air that meets preset conditions to the emergency engine; After the air supplied by the air supply system to the emergency engine meets the preset condition, determining whether the emergency engine meets the vehicle standby condition; If the emergency engine meets the vehicle standby condition, the emergency engine is started and controlled to stop after it runs stably; After the emergency engine is shut down, the lubricating oil cooling system is controlled to operate, and the lubricating oil temperature in the emergency engine is cooled to a first preset value; at the same time, the cooling water cooling system is controlled to operate, and the cooling water temperature in the emergency engine is cooled to a second preset value; After the lubricating oil temperature reaches a first preset value and the cooling water temperature cools to a second preset value, the emergency engine is started and controlled to stop after it runs stably; The cycle continues until the emergency engine reaches the start number.

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