Energy self-balancing lubricating oil system for test bed

Abstract

The utility model belongs to the technical field of test bed lubricating oil systems, and particularly relates to an energy self-balancing lubricating oil system for a test bed. The lubricating oil tank and the lubricating oil user are connected through a pipeline, the primary side in the heat exchanger is used for lubricating oil circulation, and the secondary side in the heat exchanger is used for circulating water circulation; the first heat preservation water storage tank is used for storing cold water, and one end of the secondary side in the heat exchanger is connected with the first heat preservation water storage tank through a pipeline. And the second heat preservation water storage tank is used for storing the heated cooling water, and the other end of the secondary side in the heat exchanger is connected with the second heat preservation water storage tank through a pipeline. The lubricating oil is heated or cooled through heat or cold extracted from the lubricating oil, energy self-balance of a lubricating oil system is achieved, input of external heat or cold is reduced, and energy is saved.

Description

Technical Field

[0001] The utility model belongs to the technical field of test bench lubricating oil systems, and in particular relates to an energy self-balancing lubricating oil system for a test bench. Background Art

[0002] Steam turbines, gas turbines, compressors and other rotating equipment must undergo operation tests before leaving the factory to inspect the mechanical properties of the equipment. During the test run, these rotating equipment need to supply a large amount of lubricating oil to the bearings for cooling and at the same time form oil film lubrication to reduce friction between moving and static parts and maintain stable operation of the equipment.

[0003] The lubricating oil system has strict requirements on the lubricating oil temperature and flow rate. Different speeds, different loads, different ambient temperatures, and different units require different lubricating oil temperatures and flows. The test run is a process for testing the performance of new equipment under various working conditions. Therefore, the operating conditions of the test bench lubricating oil system are ever-changing.

[0004] To ensure the lubricating oil temperature meets requirements, the lubricating oil system is equipped with oil coolers, oil heaters, flow control devices, and other devices. When the lubricating oil temperature is too high, it is cooled by an oil cooler, typically using water cooling. This removes the heat from the lubricating oil through circulating water and then dissipates it into the atmosphere through a cooling tower. However, this causes the heat removed from the components to be wasted. When the lubricating oil temperature is too low, it is heated by an oil heater, typically using electrical or steam heating, which consumes significant amounts of electricity and fuel.

[0005] In existing solutions, cooling and heating the lubricating oil are typically performed in two separate open circuits. During cooling, the lubricating oil's heat is wasted into the atmosphere, while during heating, heat is transferred to the lubricating oil via electricity or steam. Both heating and cooling require continuous energy consumption, resulting in high energy and water consumption and low energy efficiency.

[0006] For the test bench lubricating oil system, since the units need to be started and stopped frequently and correspond to different models of units every day, the operating conditions of the lubricating oil system are extremely unstable. The electrical energy, thermal energy and cooling energy consumed in each operating condition are different, which makes the lubricating oil system consume more energy and have lower efficiency. Utility Model Content

[0007] The problems to be solved by the present invention are: the lubricating oil system of the test bench requires continuous heat and cold input, consumes a lot of energy and water, and has low energy efficiency; the cooling system and heating system of the lubricating oil are independent of each other, resulting in double energy consumption, lack of comprehensive energy considerations, and poor operating economy.

[0008] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0009] An energy self-balancing lubricating oil system for a test bench includes a lubricating oil tank and a lubricating oil user connected by a pipeline, and further includes:

[0010] Heat exchanger, the primary side inlet of the heat exchanger is connected to the lubricating oil tank through a pipeline, and the primary side outlet is connected to the lubricating oil user through a pipeline;

[0011] A first thermal insulation water storage tank, the first thermal insulation water storage tank is used to store cold water, and one end of the secondary side of the heat exchanger is connected to the first thermal insulation water storage tank through a pipeline;

[0012] A second thermal insulation water storage tank is used to store the heated cooling water, and the other end of the secondary side of the heat exchanger is connected to the second thermal insulation water storage tank through a pipeline;

[0013] A circulating water pump 1 and a switch valve 1 are connected in series on the pipeline connecting the heat exchanger and the first heat-insulating water storage tank; a switch valve 2 is connected in parallel at both ends of the circulating water pump 1 and the switch valve 1;

[0014] On the pipeline connecting the heat exchanger and the second heat-insulated water storage tank, a circulating water pump 2 and a switch valve 3 are provided in series; and a switch valve 4 is provided in parallel at both ends of the circulating water pump 2 and the switch valve 3 connected in series.

[0015] Temperature sensor 1 is arranged on the pipeline connecting the lubricating oil tank and the heat exchanger, close to the outlet of the lubricating oil tank.

[0016] Furthermore, a switch valve five and a cooling tower connected in series are arranged in parallel at both ends of the switch valve one.

[0017] Furthermore, a three-way temperature control valve is provided on the pipeline connecting the heat exchanger and the lubricating oil tank, and a lubricating oil bypass pipeline is provided between the pipeline after the temperature sensor and the three-way temperature control valve, and a flow regulating valve is provided on the lubricating oil bypass pipeline.

[0018] Furthermore, a heating device is provided on the pipeline between the outlet of the primary side of the heat exchanger and the three-way temperature control valve, and a second temperature sensor is provided on the pipeline connecting the heat exchanger and the heating device.

[0019] Furthermore, the heating device is an electric heater or a solar heater.

[0020] Furthermore, a temperature sensor 3 is provided on the pipeline connecting the three-way temperature control valve and the lubricating oil user.

[0021] Furthermore, a filter is provided on the pipeline close to the lubricating oil user inlet.

[0022] Furthermore, a lubricating oil circuit is provided between the lubricating oil user and the lubricating oil tank.

[0023] Furthermore, the temperature sensor 1, the temperature sensor 2, and the temperature sensor 3 all use temperature transmitters.

[0024] Furthermore, a suction filter and a lubricating oil pump connected to the suction filter are provided in the lubricating oil tank, and the lubricating oil pump is connected to the primary side inlet of the heat exchanger; and a temperature sensor 4 is provided on the lubricating oil tank.

[0025] Compared with the lubricating oil system in the prior art, the utility model has the following beneficial effects:

[0026] The energy-self-balancing lubricating oil system for the test bench of the present invention combines the lubricating oil cooling system and the heating system through energy storage. When the lubricating oil needs to be cooled, the extracted heat is stored. When the lubricating oil needs to be heated, the stored energy is used to heat the lubricating oil. The heat or cold extracted from the lubricating oil is used to heat or cool the lubricating oil, achieving energy self-balancing of the lubricating oil system, reducing the input of external heat or cold, and saving energy. This solves the problem of two-way energy consumption in heating and cooling the lubricating oil. The heat extracted from the lubricating oil is used to heat the lubricating oil, and the cold extracted from the lubricating oil is used to cool the lubricating oil, achieving energy self-balancing of the lubricating oil system, reducing unnecessary energy consumption, reducing system energy consumption, and ensuring continuous and stable operation of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a structural schematic diagram of the energy self-balancing lubricating oil system for the test bench of the present utility model.

[0028] Reference numerals:

[0029] 1—Lubricating oil tank; 2—Suction filter; 3—Lubricating oil pump; 41—Temperature transmitter 1; 42—Temperature transmitter 2; 43—Temperature transmitter 3; 5—Heat exchanger; 6—Electric heater; 7—Three-way temperature control valve; 8—Electric flow regulating valve; 9—Second insulated water storage tank; 10—First insulated water storage tank;

[0030] 11—Circulating water pump 2; 12—Electric valve 4; 13—Electric valve 3; 14—Electric valve 2; 15—Electric valve 1; 16—Electric valve 5; 17—Filter; 18—Lubricating oil user; 19—Circulating water pump 1; 20—Cooling tower; 21—Temperature sensor 4. DETAILED DESCRIPTION

[0031] The technical solution of the present invention will be clearly described below in conjunction with the accompanying drawings. Obviously, the described embodiments are not all embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0032] It should be noted that the terms "center", "up", "down", "horizontal", "left", "right", "front", "back", "lateral", "longitudinal", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0033] like Figure 1 As shown, the utility model provides an energy self-balancing lubricating oil system for a test bench. The energy self-balancing lubricating oil system for a test bench includes a lubricating oil tank 1 and a lubricating oil user 18 connected by a pipeline, and a heat exchanger 5, a first insulated water storage tank 10, and a second insulated water storage tank 9 arranged between the lubricating oil tank 1 and the lubricating oil user 18. The first insulated water storage tank 10 and the second insulated water storage tank 9 are both insulated water storage tanks.

[0034] The energy self-balancing lubricating oil system for the test bench can control the temperature of the oil entering the lubricating oil user 18. The lubricating oil user 18 is the bearing of the rotating equipment.

[0035] The primary side of the heat exchanger 5 is used for lubricating oil circulation. The primary side inlet of the heat exchanger 5 is connected to the lubricating oil tank 1, and the primary side outlet is connected to the lubricating oil user 18;

[0036] The secondary side of the heat exchanger 5 is used for circulating water. The lower end of the secondary side is connected to the first insulated water storage tank 10, and the upper end of the secondary side is connected to the second insulated water storage tank 9; the first insulated water storage tank 10 is used to store cold water, and the second insulated water storage tank 9 is used to store cooled water.

[0037] When the lubricating oil flows through the heat exchanger 5, if the lubricating oil temperature is too high, cold water flows from the first insulated water storage tank 10 through the heat exchanger 5 to the second insulated water storage tank 9, and the temperature of the lubricating oil decreases after releasing heat; when the lubricating oil temperature is too low, the heated cold water flows from the second insulated water storage tank 9 through the heat exchanger 5 to the first insulated water storage tank 10, and the temperature of the lubricating oil increases after absorbing heat.

[0038] Specifically,

[0039] Lubricating oil tank 1 is equipped with a suction filter 2 and a lubricating oil pump 3 connected to the suction filter 2. The lubricating oil pump 3 is connected to the primary inlet of the heat exchanger 5. After the lubricating oil in the lubricating oil tank 1 is extracted and separated by the suction filter 2, it is delivered to the primary side of the heat exchanger 5 by the lubricating oil pump 3.

[0040] A temperature sensor 21 is provided on the lubricating oil tank 1 for measuring the temperature of the lubricating oil pump 3 in the lubricating oil tank 1.

[0041] A temperature transmitter 41 is provided on the pipeline connecting the lubricating oil pump 3 and the heat exchanger 5 for measuring the temperature of the lubricating oil pump 3 flowing out of the lubricating oil tank 1.

[0042] The pipeline connecting heat exchanger 5 and first insulated water storage tank 10 is equipped with a circulating water pump 19 and an electric valve 15 connected in series. Electric valve 2 14 is connected in parallel at both ends of the series connection between circulating water pump 19 and electric valve 15. Electric valve 5 16 and cooling tower 20 are connected in parallel at both ends of electric valve 15.

[0043] The pipeline connecting the heat exchanger 5 and the second heat-insulating water storage tank 9 is provided with a circulating water pump 2 11 and an electric valve 3 13 connected in series. An electric valve 4 12 is connected in parallel at both ends of the circulating water pump 2 11 and the electric valve 3 13 connected in series.

[0044] When the lubricating oil temperature is high, the high temperature here means that the lubricating oil temperature measured by the temperature transmitter 41 is greater than the set maximum value of the lubricating oil temperature, the circulating water pump 19 is controlled to start, the electric valve 3 13 and the electric valve 2 14 are closed, and the electric valve 4 12 and the electric valve 1 15 are opened, then the cold water in the first insulated water storage tank 10 flows through the circulating water pump 19 and the heat exchanger 5 to the second insulated water storage tank 9.

[0045] The lubricating oil is cooled by the cold water in the first thermal insulation water storage tank 10, and the cold water is sent to the heat exchanger 5 through the circulating water pump 19. The heat of the lubricating oil is extracted into the cooling water through the heat exchanger 5, and the heated cooling water enters the second thermal insulation water storage tank 9 for storage, thus completing the process of storing the heat in the lubricating oil in the second thermal insulation water storage tank 9.

[0046] If the lubricating oil temperature is still too high, the cooling tower 20 is activated to further reduce the cooling water temperature. Meanwhile, the motorized valves 3, 14, and 15 are closed, and the motorized valves 4, 12, and 5 are opened. The water in the first insulated water tank 10 flows through the cooling tower 20, the circulating water pump 19, and the heat exchanger 5 to the second insulated water tank 9. At the same time, the water output of the circulating water pump 19 is increased. By increasing the circulating water output and lowering the water temperature, the lubricating oil temperature meets the operating requirements.

[0047] When the lubricating oil temperature is low, the low temperature here means that the lubricating oil temperature measured by the temperature transmitter 1 41 is lower than the set minimum value of the lubricating oil temperature, the circulating pump 2 11 is controlled to start, the electric valve 4 12 and the electric valve 1 15 are closed, and the electric valve 3 13 and the electric valve 2 14 are opened, then the water in the second thermal insulation water storage tank 9 flows to the first thermal insulation water storage tank 10 after passing through the circulating pump 2 11 and the heat exchanger 5.

[0048] The lubricating oil is heated by the hot water stored in the second insulated water storage tank 9, and the cold energy of the lubricating oil is extracted into the circulating water through the heat exchanger 5. The cooled circulating water enters the first insulated water storage tank 10 for storage, thus completing the process of storing the cold energy of the lubricating oil in the first insulated water storage tank 10.

[0049] The outlet of the primary side of heat exchanger 5 is connected to the inlet of electric heater 6. A second temperature transmitter 42 is installed on the pipe connecting the heat exchanger 5 and the electric heater 6. The second temperature transmitter 42 detects the temperature of the lubricating oil after passing through the heat exchanger 5. If the lubricating oil temperature is not high enough, that is, if it is lower than the set minimum lubricating oil temperature, the electric heater 6 is activated to heat the lubricating oil until the lubricating oil temperature finally meets the operating requirements.

[0050] The outlet of electric heater 6 is connected to port 1 of three-way temperature control valve 7. Port 3 of three-way temperature control valve 7 is connected to lubricating oil user 18. Temperature transmitter 3 43 and filter 17 are sequentially installed on the pipeline connecting three-way temperature control valve 7 and lubricating oil user 18. Temperature transmitter 3 43 is used to measure the temperature of the lubricating oil that ultimately flows through lubricating oil user 18. The lubricating oil, after being temperature-controlled by heat exchanger 5, is filtered by filter 17 and then delivered to lubricating oil user 18 for use.

[0051] A lubricating oil bypass pipe is provided between the primary inlet of the heat exchanger 5 and port 2 of the three-way temperature control valve 7, serving as a bypass for the lubricating oil. An electric flow control valve 8 is installed on this lubricating oil bypass pipe. This electric flow control valve 8 adjusts the flow rate of the bypass lubricating oil and controls the final oil supply temperature.

[0052] A lubricating oil circuit is provided between the lubricating oil user 18 and the lubricating oil tank 1 for recovering the remaining oil of the lubricating oil user 18 into the lubricating oil tank 1 .

[0053] The energy self-balancing lubricating oil system for the test bench of the utility model saves extra energy consumption by extracting, storing and re-injecting the heat and cold of the lubricating oil system. When the lubricating oil needs to be cooled, the extracted heat is stored. When the lubricating oil needs to be heated, the stored energy is used to heat the lubricating oil.

[0054] Utilizing heat or cold extracted from the lubricating oil to heat or cool it achieves self-balancing energy in the lubricating oil system. This reduces energy and water consumption, conserves energy, and improves energy efficiency. A cooling tower 20 and an electric heater 6 are also provided as backup to assist in regulating the oil temperature under extreme operating conditions.

[0055] In the present invention, the lubricating oil can also be heated or cooled by other forms of green energy, such as geothermal energy, solar energy, etc. The heat storage medium can be other media or other forms of media.

[0056] The above technical features constitute the best embodiment of the present invention, which has strong adaptability and best implementation effect. Non-essential technical features can be added or removed according to actual needs to meet the needs of different situations.

[0057] Finally, it should be noted that the above content is only used to illustrate the technical solution of the utility model, rather than to limit the scope of protection of the utility model. Simple modifications or equivalent replacements of the technical solution of the utility model by ordinary technicians in this field do not deviate from the essence and scope of the technical solution of the utility model.

Claims

1. An energy self-balancing lubricating oil system for a test bench, comprising a lubricating oil tank and a lubricating oil user connected by a pipeline, characterized in that: Also includes: Heat exchanger, the primary side inlet of the heat exchanger is connected to the lubricating oil tank through a pipeline, and the primary side outlet is connected to the lubricating oil user through a pipeline; A first thermal insulation water storage tank, the first thermal insulation water storage tank is used to store cold water, and one end of the secondary side of the heat exchanger is connected to the first thermal insulation water storage tank through a pipeline; A second thermal insulation water storage tank is used to store the heated cooling water, and the other end of the secondary side of the heat exchanger is connected to the second thermal insulation water storage tank through a pipeline; A circulating water pump 1 and a switch valve 1 are connected in series on the pipeline connecting the heat exchanger and the first heat-insulating water storage tank; a switch valve 2 is connected in parallel at both ends of the circulating water pump 1 and the switch valve 1; On the pipeline connecting the heat exchanger and the second heat-insulated water storage tank, a circulating water pump 2 and a switch valve 3 are provided in series; and a switch valve 4 is provided in parallel at both ends of the circulating water pump 2 and the switch valve 3 connected in series. Temperature sensor 1 is arranged on the pipeline connecting the lubricating oil tank and the heat exchanger, close to the outlet of the lubricating oil tank.

2. The energy self-balancing lubricating oil system for a test bench according to claim 1, characterized in that: The two ends of the switch valve 1 are connected in parallel with the switch valve 5 and the cooling tower connected in series.

3. The energy self-balancing lubricating oil system for a test bench according to claim 1, characterized in that: A three-way temperature control valve is provided on the pipeline connecting the heat exchanger and the lubricating oil tank. A lubricating oil bypass pipeline is provided between the pipeline after the temperature sensor and the three-way temperature control valve. A flow regulating valve is provided on the lubricating oil bypass pipeline.

4. The energy self-balancing lubricating oil system for a test bench according to claim 3, characterized in that: A heating device is provided on the pipeline between the outlet of the primary side of the heat exchanger and the three-way temperature control valve, and a second temperature sensor is provided on the pipeline connecting the heat exchanger and the heating device.

5. The energy self-balancing lubricating oil system for a test bench according to claim 4, characterized in that: The heating device is an electric heater or a solar heater.

6. The energy self-balancing lubricating oil system for a test bench according to claim 4, characterized in that: A temperature sensor is provided on the pipeline connecting the three-way temperature control valve and the lubricating oil user.

7. The energy self-balancing lubricating oil system for a test bench according to any one of claims 1 to 6, characterized in that: A filter is provided on the pipeline close to the lubricating oil user inlet.

8. The energy self-balancing lubricating oil system for a test bench according to any one of claims 1 to 6, characterized in that: A lubricating oil circuit is provided between the lubricating oil user and the lubricating oil tank.

9. The energy self-balancing lubricating oil system for a test bench according to claim 6, characterized in that: Temperature sensor 1, temperature sensor 2, and temperature sensor 3 all use temperature transmitters.

10. The energy self-balancing lubricating oil system for a test bench according to any one of claims 1 to 6, characterized in that: A suction filter and a lubricating oil pump connected to the suction filter are provided in the lubricating oil tank, and the lubricating oil pump is connected to the primary side inlet of the heat exchanger; a temperature sensor 4 is provided on the lubricating oil tank.

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