Large ship engine performance experiment oil supply device

Abstract

The utility model discloses a large ship engine performance experiment oil supply device, which belongs to the technical field of oil supply devices, and comprises a frame, a manual stop valve is arranged on the frame, the outlet end of the manual stop valve is fixedly connected with a filter, and the outlet of the filter is connected with an oil pump. An outlet of the oil pump is connected to the electric proportional control valve through a pipeline, and an outlet of the electric proportional control valve is connected to an inlet of the oil storage tank. An outlet of the oil storage tank is connected with a mass flow meter through a pipeline, an outlet of the mass flow meter is connected with a manual three-way switching valve, one end of the manual three-way switching valve is connected with a pressure stabilizing energy dissipater, and an exhaust port in the bottom of the pressure stabilizing energy dissipater is connected with a conveying pump. An outlet of the conveying pump is connected with an inlet of the first plate heat exchanger. The utility model provides the oil supply device for the performance experiment of the large ship engine, which can adapt to large-flow and high-fall input and can always keep low-pressure constant output.

Description

TECHNICAL FIELD

[0001] The utility model relates to oil supply device technical field especially relates to a large -scale ship engine performance experiment oil supply device. BACKGROUND

[0002] Large -scale marine engine needs to carry out strict bench test in the special engine performance laboratory at the factory or research and development stage, and the fuel supply system as the important component of the test bench, the stability of its oil supply pressure and the sufficiency of flow directly relate to the accuracy of experimental data and the safety of engine operation.

[0003] In the current ship machine experiment table construction, in order to meet the requirement of fire safety and the demand of gravity transportation, the main oil tank is usually arranged on the building roof or high support structure, and its height from the ground is usually more than 15 meters, and this high arrangement makes the fuel produce high static pressure when entering the engine.

[0004] However, according to the requirement of enterprise standard and engine technical specification, the fuel import pressure needs to be strictly controlled in the low pressure range when the large -scale ship machine carries out performance experiment, in order to solve the problem of too high static pressure of high -position oil supply, the prior art usually reduces pressure by connecting " pressure reducing valve " in series on the import pipeline of the engine, and for the small and medium -sized engine with power less than 1000KW, this mode can usually meet the requirement.

[0005] But for the large -scale ship machine with power more than 1000KW, because its fuel consumption is extremely high, the medium used includes diesel or methanol etc., under such high flow condition, the traditional mechanical pressure reducing valve exposes the following obvious defects: when the engine is in high -power, high -load operation, the flow capacity of pressure reducing valve is limited, leading to the sudden drop of oil supply pressure, and the instantaneous fuel demand of engine cannot be met, when the instantaneous oil absorption of engine increases, the negative pressure phenomenon is prone to appear in the rear end pipeline of pressure reducing valve, further leading to the emptying phenomenon of the pipeline from pressure reducing valve to engine, cavitation or flow interruption.

[0006] Such problems not only can interrupt the experiment process, but also can cause damage to the engine fuel system. UTILITY MODEL CONTENTS

[0007] The utility model aims at providing a large -scale ship engine performance experiment oil supply device that can adapt to large flow, high drop input and always keep low pressure constant output.

[0008] In order to achieve the above object, the utility model discloses the following technical scheme: a large -scale ship engine performance experiment oil supply device, including the frame, the frame is provided with the manual stop valve, the outlet of manual stop valve is fixedly connected with the filter, the outlet of filter is connected with the oil pump, the outlet of oil pump is connected to electric proportional control valve through the pipeline, the outlet of electric proportional control valve is connected to the import of oil storage tank,

[0009] The outlet of the oil storage tank is connected to the mass flow meter through a pipeline, the outlet of the mass flow meter is connected to a manual three-way switch valve, one end of the manual three-way switch valve is connected to a pressure stabilizing energy absorber, the outlet of the bottom of the pressure stabilizing energy absorber is connected to a delivery pump, the outlet of the delivery pump is connected to the inlet of a first plate heat exchanger, the outlet of the first plate heat exchanger is connected to the inlet of a second plate heat exchanger, and the outlet of the second plate heat exchanger is connected to a double filter.

[0010] As a further description of the above technical scheme: a first branch pipe is connected to the pipeline between the filter and the oil pump, the output end of the first branch pipe is connected to the pipeline between the electric proportional control valve and the oil storage tank, and a manual valve is installed on the first branch pipe.

[0011] As a further description of the above technical scheme: the oil storage tank is a cylindrical metal container installed on the top of the frame, and a pressure gauge is installed on the top of the oil storage tank.

[0012] As a further description of the above technical scheme: the oil pump is installed horizontally and driven by a variable frequency motor.

[0013] The electric proportional control valve is used for adjusting the oil inlet amount and is linked with the liquid level gauge in the oil storage tank.

[0014] As a further description of the above technical scheme: the mass flow meter is a Coriolis force flow meter, and the manual three-way switch valve is a ball valve equipped with a long handle.

[0015] As a further description of the above technical scheme: the pressure stabilizing energy absorber is a pressure buffering device, a pressure sensor is installed on the top of the pressure stabilizing energy absorber, and the delivery pump is used for delivering fuel to the first plate heat exchanger.

[0016] As a further description of the above technical scheme: a second branch pipe is further included, one end of the second branch pipe is connected to the pipeline between the pressure stabilizing energy absorber and the delivery pump, and the other end is connected to the pipeline between the delivery pump and the first plate heat exchanger.

[0017] Manual valves are installed on the second branch pipe and the front end of the inlet of the first plate heat exchanger.

[0018] As a further description of the above technical solution: the upper outlet of the first plate heat exchanger is connected with the lower inlet of the second plate heat exchanger, and a manual valve is installed at the upper outlet of the second plate heat exchanger;

[0019] The double filter is composed of two filter cartridges arranged in parallel and a switching handle.

[0020] In summary, due to the adoption of the above technical solution, the beneficial effects of the present application are:

[0021] 1. By setting a first plate heat exchanger and a second plate heat exchanger, multi-stage heat exchange of fuel oil is realized; the design can accurately heat or cool the fuel oil according to experimental requirements, so as to maintain the fuel oil viscosity in the best range, and ensure the accuracy of flow measurement and the stability of engine combustion performance.

[0022] 2. By setting an open oil tank near the engine, the high pressure potential of the upstream high-level oil depot is cut off, and the precise linkage of the electric proportional control valve and the tank internal analog liquid level meter is realized, so that the tank liquid level is strictly controlled in a very small fluctuation range, and the constant liquid level height ensures the absolute stability of the outlet pressure from the physical level. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 The schematic diagram of the present application is shown;

[0024] Figure 2 The perspective view of the present application is shown;

[0025] Figure 3 The rear view of the present application is shown;

[0026] Figure 4 The perspective view of the oil pump and the electric proportional control valve of the present application is shown;

[0027] Figure 5 The perspective view of the electric proportional control valve and the oil tank of the present application is shown;

[0028] Figure 6 The perspective view of the delivery pump and the plate heat exchanger of the present application is shown;

[0029] Figure 7 The perspective view of the double filter of the present application is shown.

[0030] LEGEND:

[0031] 10, frame; 11, manual stop valve; 12, filter; 13, oil pump; 14, electric proportional control valve; 15, oil tank; 16, pressure gauge; 17, first branch pipe; 18, manual valve; 19, mass flow meter; 20, manual three-way switch valve; 21, pressure stabilizing energy absorber; 22, delivery pump; 23, first plate heat exchanger; 24, second plate heat exchanger; 25, double filter; 26, second branch pipe. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0033] Please refer to Figures 1-7 The utility model provides a kind of technical solutions: a large-scale ship engine performance experiment oil supply device, including frame 10, frame 10 is rigid support structure, for installing and fixed various pipeline components.

[0034] Manual stop valve 11 is arranged on frame 10 at the inlet end of the fluid into the device, and the valve is used to cut off the connection between the external oil depot and the device by manual operation during system maintenance or shutdown.

[0035] The outlet end of manual stop valve 11 is fixedly connected with filter 12, and filter 12 serves as a coarse filtration unit and can preliminarily intercept large-particle impurities in fuel from the oil depot to protect subsequent pump sets and other valve parts.

[0036] The outlet of filter 12 is connected with oil pump 13 on the oil inlet booster pipeline, oil pump 13 is installed horizontally and is driven by a variable frequency motor, and the main function of oil pump 13 is to deliver fuel to oil tank 15.

[0037] Through the variable frequency control function, the system can dynamically adjust the fuel delivery flow according to the actual load demand of the engine, and the outlet of oil pump 13 is connected to electric proportional control valve 14 through a pipeline, electric proportional control valve 14 serves as an automatic actuating mechanism and is used to adjust the oil inlet amount, and the outlet of electric proportional control valve 14 is further connected to the inlet of oil tank 15 through a pipeline.

[0038] Oil tank 15 is a cylindrical metal container installed on the top of frame 10, and pressure gauge 16 is installed on the top of the tank body to monitor the pressure condition in the tank in real time.

[0039] To improve the flexibility of the system and realize the bypass function, the input end of the first branch pipe 17 is connected to the pipeline between the filter 12 and the oil pump 13, and the output end of the first branch pipe 17 is connected to the pipeline between the electric proportional control valve 14 and the oil tank 15.

[0040] The first branch pipe 17 is equipped with a manual valve 18, which can be opened to realize the operation when the bypass operation or specific test is performed on the oil pump 13 or the electric proportional control valve 14.

[0041] The device abandons the traditional single control mode relying on the pressure reducing valve, sets an open oil tank 15 near the engine, cuts off the high pressure potential of the upstream high-level oil reservoir by using the working principle of communication with the atmosphere, and strictly controls the liquid level in the tank within a small fluctuation range, such as 0-5mm, through the precise linkage of the electric proportional control valve 14 and the tank analog liquid level meter.

[0042] According to the principle of hydrostatics, the constant liquid level height ensures the absolute stability of the outlet pressure from the physical level. This design can keep the engine inlet pressure below 50KPa under the large flow condition of fuel consumption exceeding 1m³ / h, effectively avoiding the pressure fluctuation and pipeline emptying risk caused by the pressure reducing valve.

[0043] The outlet at the bottom of the oil tank 15 is connected to the mass flow meter 19 through a pipeline. The Coriolis force type is preferred for the mass flow meter 19, which can accurately measure the fuel consumption of the engine in real time, is suitable for various media such as diesel and methanol, and the measurement result is not affected by changes in fluid temperature, pressure or viscosity, thereby ensuring the accuracy of experimental data.

[0044] The outlet of the mass flow meter 19 is connected to a manual three-way switch valve 20. The valve is a heavy-duty ball valve equipped with a long handle, which has the function of switching the fluid path and can be used as a safety valve to shut off the oil supply circuit in maintenance and emergency situations.

[0045] One end of the manual three-way switch valve 20 is connected to a pressure stabilizing energy absorber 21, which is a cylindrical pressure buffer device with a pressure sensor at the top. Its main function is to absorb the pulsation and fluid impact in the pipeline, eliminate flow fluctuations, and ensure smooth oil flow into the front end of the engine.

[0046] The discharge outlet at the bottom of the pressure stabilizing energy absorber 21 is connected to a delivery pump 22. The function of the delivery pump 22 is to overcome the resistance of the subsequent pipeline and deliver fuel to the heat exchange unit.

[0047] The outlet of the delivery pump 22 is connected to the lower end inlet of the first plate heat exchanger 23, and a second branch pipe 26 is arranged at the position, one end of which is connected to the pipeline between the pressure stabilizing energy absorber 21 and the delivery pump 22, and the other end of which is connected to the pipeline between the delivery pump 22 and the first plate heat exchanger 23.

[0048] The second branch pipe 26 is used for bypassing or backflow adjusting of the delivery pump 22 under certain operating conditions, and manual valves 18 are arranged at the front end of the second branch pipe 26 and the inlet of the first plate heat exchanger 23, so as to control the passage and flow of the fluid.

[0049] The upper outlet of the first plate heat exchanger 23 is connected to the lower inlet of the second plate heat exchanger 24 through a pipeline, and the upper outlet of the second plate heat exchanger 24 is connected to the double filter 25 through a pipeline, and a manual valve 18 is arranged at the outlet of the second plate heat exchanger 24.

[0050] The first plate heat exchanger 23 and the second plate heat exchanger 24 jointly constitute the core part of the system heat exchange, and heat exchange is performed between the cooling water or heating medium and the fuel oil, so as to accurately control the fuel oil temperature, so as to ensure that the fuel oil viscosity is maintained in the optimal range required by the engine performance test.

[0051] Through the arrangement of the first plate heat exchanger 23 and the second plate heat exchanger 24, multi-stage heat exchange of the fuel oil is realized; the design can accurately heat or cool the fuel oil according to the experimental requirements, so as to maintain the fuel oil viscosity in the optimal range, and ensure the accuracy of the flow metering and the stability of the engine combustion performance; in addition, the integrated pressure stabilizing energy absorber 21 can effectively absorb the pulsation and fluid impact generated by the pump set, and cooperate with the real-time feedback of the pressure sensor, so as to ensure that the fuel flowing into the engine is stable and has no fluctuation.

[0052] The double filter 25 is located at the end of the fluid path, and is composed of two parallel filter cartridges and a switching handle, and is used for removing small impurities in the fuel oil, so as to ensure that the cleanliness of the fuel supplied to the engine meets the experimental standard.

[0053] The advantage of the double structure design is that it allows the fluid to be switched to the other filter cartridge by operating the handle without interrupting the system operation, so as to facilitate the online replacement or cleaning of the blocked filter element by the staff.

[0054] In the long-time running test of the engine, when it is monitored that the filter pressure difference is too large (i.e. the filter element is blocked), the operator switches the oil way to the standby filter cartridge through the switching handle, so that the cleaning or replacement of the filter element can be completed without stopping, thereby significantly improving the efficiency and continuity of the test.

[0055] Manual valves 18 are installed at key nodes, and manual tee switches 20 are arranged at the ends, so as to quickly cut off the circuit in emergency, realize independent maintenance and bypass test of each component, and thus ensure the safety and flexibility of operation in the experimental site.

[0056] Working principle:

[0057] During system operation, fuel first enters through manual stop valve 11 and filter 12, and is pressurized by oil pump 13 driven by frequency conversion.

[0058] Subsequently, the flow is adjusted by electric proportional control valve 14, and then enters oil storage tank 15. In oil storage tank 15, fuel is metered by mass flow meter 19, and pulsation interference is reduced by pressure stabilizing energy absorber 21.

[0059] Then, fuel is delivered by delivery pump 22 to first plate heat exchanger 23 and second plate heat exchanger 24, so as to realize temperature regulation.

[0060] After regulation is completed, fuel is filtered by double filter 25, and then supplied to the engine.

[0061] The above is only the preferred specific implementation mode of the present application, but the protection scope of the present application is not limited to this. Any skilled person in the art, according to the technical scheme and the inventive concept of the present application, makes equivalent replacement or change within the technical range disclosed by the present application, and all should be covered in the protection scope of the present application.

Claims

1. A large ship engine performance experiment oil supply device comprising a frame (10), characterized in that: The frame (10) is provided with a manual cut-off valve (11), the outlet end of the manual cut-off valve (11) is fixedly connected with a filter (12), the outlet of the filter (12) is connected with an oil pump (13), the outlet of the oil pump (13) is connected to an electric proportional control valve (14) through a pipeline, and the outlet of the electric proportional control valve (14) is connected to the inlet of an oil storage tank (15); The outlet of the oil storage tank (15) is connected with a mass flow meter (19) through a pipeline, the outlet of the mass flow meter (19) is connected with a manual three-way switch valve (20), one end of the manual three-way switch valve (20) is connected with a pressure stabilizing energy absorber (21), the outlet at the bottom of the pressure stabilizing energy absorber (21) is connected with a delivery pump (22), the outlet of the delivery pump (22) is connected with the inlet of a first plate heat exchanger (23), the outlet of the first plate heat exchanger (23) is connected with the inlet of a second plate heat exchanger (24), and the outlet of the second plate heat exchanger (24) is connected with a double filter (25).

2. The oil supply device for a performance experiment of a large marine engine according to claim 1, characterized in that: The pipeline between the filter (12) and the oil pump (13) is communicated with the input end of a first branch pipe (17), the output end of the first branch pipe (17) is connected with the pipeline between the electric proportional control valve (14) and the oil storage tank (15), and a manual valve (18) is installed on the first branch pipe (17).

3. The oil supply device for a performance experiment of a large marine engine according to claim 1, characterized in that: The oil storage tank (15) is a cylindrical metal container installed on the top of the frame (10), and a pressure gauge (16) is installed on the top of the oil storage tank (15).

4. The oil supply device for a performance experiment of a large marine engine according to claim 1, wherein: The oil pump (13) is installed horizontally and is driven by a variable frequency motor; The electric proportional control valve (14) is used for adjusting the oil inlet amount and is linked with a liquid level meter in the oil storage tank (15).

5. The oil supply device for a performance experiment of a large marine engine according to claim 1, wherein: The mass flow meter (19) is a Coriolis force flow meter, and the manual three-way switch valve (20) is a ball valve provided with a long handle.

6. The oil supply device for a large marine engine performance test according to claim 1, wherein: The pressure stabilizing energy absorber (21) is a pressure buffering device, a pressure sensor is installed on the top of the pressure stabilizing energy absorber (21), and the delivery pump (22) is used for delivering fuel to the first plate heat exchanger (23).

7. A fuel supply device for a large marine engine performance test according to claim 2, characterized in that: A second branch pipe (26) is further included, one end of the second branch pipe (26) is connected with the pipeline between the pressure stabilizing energy absorber (21) and the delivery pump (22), and the other end is connected with the pipeline between the delivery pump (22) and the first plate heat exchanger (23). Manual valves (18) are installed on the second branch pipe (26) and the front end of the inlet of the first plate heat exchanger (23).

8. A fuel supply device for a large marine engine performance test according to claim 7, characterized in that: The upper outlet of the first plate heat exchanger (23) is connected with the lower inlet of the second plate heat exchanger (24), and a manual valve (18) is installed at the upper outlet of the second plate heat exchanger (24); The double filter (25) is composed of two parallelly arranged filter cartridges and a switch handle.

Images