Cooling systems and ship power plants

Abstract

The present invention relates to the field of cooling technology, and provides a cooling system and a ship power unit. The above-mentioned cooling system includes: a cooling mechanism, a resonance mechanism, a detection mechanism, and an adjustment mechanism. The resonance mechanism is connected to the cooling mechanism. The resonance mechanism has a cavity filled with gas. The detection mechanism is used to detect the frequency of the flow noise generated when the cooling mechanism is in operation. The adjustment mechanism is used to adjust the volume of the gas in the cavity based on the frequency of the flow noise so that the resonance frequency of the cavity matches the frequency of the flow noise. The above-mentioned cooling system adjusts the air volume in the cavity of the resonance mechanism according to the frequency of the flow noise so that the resonance frequency of the cavity of the resonance mechanism matches the frequency of the flow noise, thereby converting the flow noise energy generated when the cooling mechanism is in operation into mechanical vibration energy. Thereafter, the mechanical vibration can be eliminated through conventional vibration reduction measures, effectively reducing the noise intensity of the flow noise under different operating conditions.

Description

Technical Field

[0001] The present invention relates to the field of cooling technology, and in particular to a cooling system and a ship power device. Background Art

[0002] The cooling system is the main functional subsystem of the ship's power system. The main equipment that makes up the cooling system includes two parts: the cooler and the cooling water pump. The main working principle of the cooling system is to suck relatively low-temperature cooling water from the external environment into the cooler through the cooling water pump to cool the various heat source equipment on the ship, and then discharge it through the discharge port.

[0003] Flow noise within cooling systems refers to the noise generated by the operation of the cooling water pump and transmitted along the fluid within the pipes. Currently, the lack of effective noise reduction measures is the primary reason cooling systems cannot meet their desired quietness requirements. In particular, cooling water pumps often require variable frequency and speed operation to meet cooling load requirements under varying operating conditions. This results in varying flow noise spectrum characteristics under different operating conditions. Existing flow noise control technologies are unable to adaptively adjust the noise reduction capabilities of different frequencies, making it impossible to achieve low-noise operation of the cooling system under all operating conditions. Summary of the Invention

[0004] The present invention provides a cooling system and a ship power device, which are used to solve the defect in the prior art that when the cooling system operates under different working conditions, the noise reduction device cannot reduce the flow noise of different frequencies.

[0005] The present invention provides a cooling system, comprising: a cooling mechanism, a resonance mechanism, a detection mechanism and an adjustment mechanism, wherein the resonance mechanism is connected to the cooling mechanism, the resonance mechanism has a cavity filled with gas, the detection mechanism is used to detect the frequency of flow noise generated when the cooling mechanism is in operation, and the adjustment mechanism is used to adjust the volume of the gas in the cavity based on the frequency of the flow noise so that the resonance frequency of the cavity matches the frequency of the flow noise.

[0006] A cooling system provided according to the present invention further includes a controller, which is electrically connected to the detection mechanism and the adjustment mechanism, and is used to control the operation of the adjustment mechanism according to the frequency of the flow noise detected by the detection mechanism.

[0007] According to a cooling system provided by the present invention, the cooling mechanism includes: a cooler, a first pipeline, a second pipeline and a pump, the first pipeline and the second pipeline are respectively connected to the inlet side and the outlet side of the cooler, and the pump is arranged in the first pipeline; part of the resonance mechanism is connected to the cooler.

[0008] According to a cooling system provided by the present invention, the resonance mechanism includes: a conduit and a resonator, the first end of the conduit is connected to the cooler, and the second end of the conduit is connected to the resonator; the resonator is provided with the cavity, the cavity is connected to the conduit, and the resonator is connected to the adjustment mechanism, and the adjustment mechanism is used to adjust the volume of the gas in the cavity.

[0009] According to a cooling system provided by the present invention, the detection mechanism is a hydrophone, which is arranged in the second pipeline and is used to detect the frequency of flow noise in the second pipeline; the adjustment mechanism is used to adjust the volume of gas in the resonance mechanism based on the frequency of the flow noise.

[0010] According to a cooling system provided by the present invention, the detection mechanism includes an electromagnetic liquid level meter, which is arranged in the conduit and is used to detect the liquid level of the liquid in the conduit. The adjustment mechanism is used to adjust the volume of the gas in the resonator based on the liquid level.

[0011] According to a cooling system provided by the present invention, the detection mechanism also includes a memory, in which a speed-frequency-liquid level database is stored. The speed-frequency-liquid level database is a database established based on the speed of the pump, the frequency of the flow noise of the pump at the corresponding speed, and the liquid level of the liquid in the conduit corresponding to the frequency.

[0012] According to a cooling system provided by the present invention, the regulating mechanism includes: an air reservoir, an air intake pipe and an air intake valve. The air reservoir is connected to the resonator through the air intake pipe, and the air intake valve is provided on the air intake pipe.

[0013] According to a cooling system provided by the present invention, the regulating mechanism further includes an air outlet pipe and an air outlet valve, the air outlet pipe is communicated with the resonator, and the air outlet valve is arranged on the air outlet pipe.

[0014] The present invention also provides a ship power device, comprising a shock absorber and the cooling system as described above, wherein the shock absorber is used to reduce vibration of the cooling system.

[0015] The cooling system provided by the present invention, by providing a resonance mechanism, a detection mechanism and an adjustment mechanism, adjusts the air volume in the resonance mechanism cavity according to the frequency of the flow noise, so that the resonance frequency of the resonance mechanism cavity matches the frequency of the flow noise, thereby converting the flow noise energy generated during the operation of the cooling mechanism into mechanical vibration energy. The mechanical vibration can then be eliminated through conventional vibration reduction measures, effectively reducing the noise intensity of the flow noise under different operating conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 This is one of the structural diagrams of the cooling system provided by the present invention.

[0018] Figure 2 This is the second structural diagram of the cooling system provided by the present invention.

[0019] Reference numerals:

[0020] 10. Cooler; 11. First pipeline; 12. Second pipeline; 13. Pump; 21. Conduit; 22. Resonator; 30. Hydrophone; 31. Electromagnetic level gauge; 32. Storage device; 41. Air storage device; 42. Inlet pipe; 43. Inlet valve; 44. Outlet pipe; 45. Outlet valve; 50. Controller. DETAILED DESCRIPTION

[0021] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0022] The following combination Figure 1 and Figure 2 The cooling system and ship power plant of the present invention are described.

[0023] like Figure 1 and Figure 2 As shown, in an embodiment of the present invention, the cooling system includes a cooling mechanism, a resonance mechanism, a detection mechanism, and an adjustment mechanism. The resonance mechanism is connected to the cooling mechanism and has a cavity filled with gas. The detection mechanism is used to detect the frequency of flow noise generated by the cooling mechanism during operation, and the adjustment mechanism is used to adjust the volume of the gas in the cavity based on the frequency to match the resonance frequency of the cavity with the frequency of the noise.

[0024] Specifically, flow noise is generated when the cooling mechanism is in operation. When the operating conditions of the cooling mechanism are different, that is, the operating frequency or rotation speed of the cooling mechanism is different, the frequency of the flow noise is different. When a noise reduction device is used, it is difficult to reduce the flow noise of different frequencies. Based on this, the cooling system provided by the embodiment of the present invention can convert the flow noise energy into mechanical vibration energy, and the mechanical vibration energy does not have the problem of different spectrums. It can be eliminated by using conventional vibration reduction methods, thereby reducing the flow noise during the operation of the cooling system. Specifically, the flow noise generated when the cooling mechanism is in operation is transmitted to the resonance mechanism, and at a suitable frequency, it will cause the cavity of the resonance mechanism to resonate, thereby converting the flow noise energy into mechanical vibration energy of the resonance mechanism cavity. Based on this, it is only necessary to match the resonance frequency of the resonance mechanism cavity with the frequency of the flow noise to cause the cavity to resonate, thereby converting the flow noise energy into mechanical vibration energy, and then using conventional vibration reduction methods to reduce it, thereby achieving the purpose of reducing the flow noise in the cooling mechanism.

[0025] To ensure that the cavity is at the optimal resonant sound absorption point under different operating conditions of the cooling mechanism, a detection mechanism is used to detect the frequency of the cooling mechanism's flow noise in real time and adjust the volume of gas within the resonant mechanism cavity based on the frequency of the flow noise to match the cavity's resonant frequency with the frequency of the flow noise. Specifically, when the frequency of the flow noise is low, gas is filled into the cavity to increase the volume of the gas within the cavity, shifting the resonant frequency toward a lower frequency. When the frequency of the flow noise is high, some of the gas within the cavity is discharged to reduce the volume of the gas within the cavity, shifting the resonant frequency toward a higher frequency, thereby matching the resonant frequency with the frequency of the flow noise and reducing the flow noise.

[0026] Furthermore, the detection mechanism may be a hydrophone, which is arranged on the cooling mechanism to detect the frequency of flow noise when the cooling mechanism is in operation.

[0027] The cooling system provided by an embodiment of the present invention, by providing a resonance mechanism, a detection mechanism and an adjustment mechanism, adjusts the air volume in the resonance mechanism cavity according to the frequency of the flow noise, so that the resonance frequency of the resonance mechanism cavity matches the frequency of the flow noise, thereby converting the flow noise energy generated during the operation of the cooling mechanism into mechanical vibration energy. Thereafter, the mechanical vibration can be eliminated through conventional vibration reduction measures, thereby effectively reducing the noise intensity of the flow noise under different operating conditions.

[0028] like Figure 1 and Figure 2 As shown, in an embodiment of the present invention, the cooling mechanism includes: a cooler 10, a first pipeline 11, a second pipeline 12, and a pump 13. The first pipeline 11 and the second pipeline 12 are respectively connected to the inlet side and the outlet side of the cooler 10, and the pump 13 is provided in the first pipeline 11. The resonance mechanism is connected to the cooler 10.

[0029] Specifically, the first pipeline 11 is a liquid inlet pipeline, and the pump 13 is arranged in the first pipeline 11 to pump the liquid into the cooler 10. The second pipeline 12 is a liquid outlet pipeline. After the liquid exchanges heat with the working medium in the cooler 10, it is discharged from the second pipeline 12. Flow noise is generated when the pump 13 is running. The frequency of the flow noise is different when the pump 13 is running under different working conditions. The resonance mechanism is connected to the cooler 10, and the flow noise can be transmitted along the resonance mechanism. When the frequency of the flow noise matches the resonance frequency of the cavity, the cavity resonates, thereby converting the flow noise energy into mechanical vibration energy, and the mechanical vibration energy can be absorbed and dissipated by conventional vibration reduction measures, such as arranging vibration absorbers around the cavity to reduce vibration, thereby achieving the purpose of reducing flow noise.

[0030] like Figure 1 and Figure 2 As shown, in an embodiment of the present invention, the resonance mechanism includes: a conduit 21 and a resonator 22. The first end of the conduit 21 is connected to the cooler 10, and the second end of the conduit 21 is connected to the resonator 22. The resonator 22 has a cavity, which is connected to the conduit 21. The resonator 22 is connected to a regulating mechanism for adjusting the volume of the gas in the cavity.

[0031] Specifically, one end of the conduit 21 extends into the head on the inlet side of the cooler 10, and the other end is connected to the resonator 22. The noise generated when the pump 13 is in operation is transmitted to the cavity of the resonator 22 through the conduit 21. It can be understood that the liquid that enters the inlet side head through the first pipeline 11 will also enter the conduit 21. The cavity of the resonator 22 is connected to the conduit 21. When the volume of the gas in the cavity increases, the liquid level in the conduit 21 decreases; correspondingly, when the volume of the gas in the cavity decreases, the liquid level in the conduit 21 rises. The detection mechanism detects the frequency of the flow noise and adjusts the volume of the gas in the cavity of the resonator 22 according to the frequency, so that the resonant frequency of the cavity of the resonator 22 matches the frequency of the flow noise, so as to realize the conversion of the flow noise energy into mechanical vibration energy.

[0032] like Figure 1 and Figure 2 As shown, in an embodiment of the present invention, the cooling system further includes a controller 50, which is electrically connected to the detection mechanism and the adjustment mechanism. The controller 50 is used to control the action of the adjustment mechanism according to the frequency of the flow noise detected by the detection mechanism.

[0033] Specifically, the detection mechanism sends the frequency of the detected flow noise to the controller 50, and the controller 50 controls the action of the adjustment mechanism according to the frequency to increase or decrease the volume of the gas in the cavity of the resonator 22, so as to adjust the resonant frequency of the cavity of the resonator 22, so that the resonant frequency of the cavity of the resonator 22 matches the frequency of the flow noise.

[0034] like Figure 1 As shown, in one embodiment of the present invention, the detection mechanism is a hydrophone 30, which is arranged in the second pipeline 12. The hydrophone 30 is used to detect the frequency of the flow noise in the second pipeline 12 and send the detected data to the controller 50. The controller 50 controls the operation of the adjustment mechanism according to the frequency to adjust the volume of the gas in the cavity of the resonator 22 so that the resonant frequency of the cavity matches the frequency of the noise.

[0035] like Figure 1 and Figure 2 As shown, in the embodiment of the present invention, the regulating mechanism includes: an air reservoir 41, an air intake pipe 42 and an air intake valve 43. The air reservoir 41 is connected to the resonator 22 through the air intake pipe 42, and the air intake valve 43 is provided on the air intake pipe 42.

[0036] Specifically, the hydrophone 30 sends the frequency of the detected flow noise to the controller 50. When the frequency of the flow noise is low, the controller 50 controls the air inlet valve 43 to open, and the gas in the air storage tank 41 enters the resonator 22. The volume of the gas in the resonator 22 increases, and the resonant frequency shifts to a low frequency, thereby matching the resonant frequency of the cavity of the resonator 22 with the frequency of the flow noise.

[0037] Furthermore, the regulating mechanism includes an outlet pipe 44 and an outlet valve 45. The outlet pipe 44 is connected to the resonator 22, and the outlet valve 45 is provided on the outlet pipe 44. The hydrophone 30 transmits the detected frequency of the flow noise to the controller 50. When the frequency of the flow noise is high, the controller 50 controls the outlet valve 45 to open, exhausting the gas in the resonator 22, reducing the volume of the gas in the resonator 22, and shifting the resonant frequency to a higher frequency, thereby matching the resonant frequency of the resonator 22 cavity with the frequency of the flow noise.

[0038] like Figure 2 As shown, in another embodiment of the present invention, the detection mechanism includes an electromagnetic liquid level meter 31, which is arranged in the conduit 21 and is used to detect the liquid level in the conduit 21. The adjustment mechanism is used to adjust the volume of the gas in the resonator 22 based on the liquid level.

[0039] Specifically, one end of the conduit 21 extends into the end cap on the inlet side of the cooler 10, and the liquid enters the end cap through the first pipeline 11, and then flows into the conduit 21. The electromagnetic level meter 31 is provided in the conduit 21 to detect the liquid level of the liquid in the conduit 21. In an optional embodiment of the present invention, a speed-level-frequency database may be pre-stored in the controller 50. When the speed of the pump 13 is different, the frequency of the flow noise is different, and the liquid level of the liquid in the conduit 21 is also different. A speed-level-frequency database can be established in advance through experiments. When the cooling system is running, the electromagnetic level meter 31 sends the detected liquid level data to the controller 50. The controller 50 controls the operation of the regulating mechanism according to the frequency corresponding to the liquid level in the speed-level-frequency database to adjust the volume of the gas in the cavity of the resonator 22.

[0040] Specifically, when the frequency of the flow noise is low, the controller 50 controls the inlet valve 43 to open, allowing the gas in the gas reservoir 41 to enter the resonator 22. This increases the volume of the gas in the resonator 22, shifting the resonant frequency toward a lower frequency, thereby matching the resonant frequency of the resonator 22 cavity with the frequency of the flow noise. When the frequency of the flow noise is high, the controller 50 controls the outlet valve 45 to open, allowing the gas in the resonator 22 to be discharged. This reduces the volume of the gas in the resonator 22, shifting the resonant frequency toward a higher frequency, thereby matching the resonant frequency of the resonator 22 cavity with the frequency of the flow noise.

[0041] Furthermore, in a specific embodiment of the present invention, the detection mechanism also includes a memory 32, which stores a speed-frequency-liquid level database. The speed-frequency-liquid level database is a database established based on the speed of the pump 13, the frequency of the flow noise of the pump 13 at the corresponding speed, and the liquid level of the liquid in the conduit 21 corresponding to the frequency.

[0042] Specifically, in this embodiment, the electromagnetic liquid level meter 31 sends the detected liquid level data to the controller 50. The controller 50 retrieves the frequency of the flow noise corresponding to the liquid level data from the database of the memory 32 based on the liquid level data, and then controls the operation of the regulating mechanism according to the frequency.

[0043] An embodiment of the present invention further provides a ship power device, including a vibration damper and a cooling system, wherein the vibration damper is used to reduce vibration of the cooling system.

[0044] Specifically, the cooling system includes a cooling mechanism, a resonance mechanism, a detection mechanism, and an adjustment mechanism. The resonance mechanism is connected to the cooling mechanism and has a cavity filled with gas. The detection mechanism is used to detect the frequency of the flow noise generated by the cooling mechanism during operation, and the adjustment mechanism is used to adjust the volume of the gas in the cavity based on this frequency to match the resonant frequency of the cavity with the frequency of the noise.

[0045] Flow noise is generated when the cooling mechanism is in operation. When the operating conditions of the cooling mechanism are different, that is, when the operating frequency or speed of the cooling mechanism is different, the frequency of the flow noise is different. When a noise reduction device is used, it is difficult to reduce flow noise of different frequencies. In an embodiment of the present invention, the flow noise energy can be converted into mechanical vibration energy, and mechanical vibration energy does not have the problem of different spectrums. It can be eliminated by using a conventional vibration absorber, thereby reducing the flow noise during operation of the cooling system. Specifically, the flow noise generated when the cooling mechanism is in operation is transmitted to the resonance mechanism, and at a suitable frequency, it will cause the cavity of the resonance mechanism to resonate, thereby converting the flow noise energy into mechanical vibration energy of the resonance mechanism cavity. Based on this, it is only necessary to match the resonance frequency of the resonance mechanism cavity with the frequency of the flow noise to cause the cavity to resonate, thereby converting the flow noise energy into mechanical vibration energy, and then using conventional vibration reduction methods to reduce it, thereby achieving the purpose of reducing the flow noise in the cooling mechanism.

[0046] In order to ensure that the cavity is at the optimal resonant sound absorption point under different operating conditions of the cooling mechanism, the detection mechanism is used to detect the frequency of the flow noise of the cooling mechanism in real time, and adjust the volume of gas in the cavity of the resonance mechanism according to the frequency of the flow noise, so that the resonant frequency of the cavity matches the frequency of the flow noise. Specifically, when the frequency of the flow noise is low, gas is filled into the cavity to increase the volume of the gas in the cavity, so that the resonant frequency shifts to a low frequency; when the frequency of the flow noise is high, part of the gas in the cavity is discharged to reduce the volume of the gas in the cavity, so that the resonant frequency shifts to a high frequency, thereby matching the resonant frequency with the frequency of the flow noise to reduce the flow noise. Furthermore, a vibration damper can be set outside the cavity of the resonance mechanism to reduce the vibration of the cavity.

[0047] Furthermore, the detection mechanism may be a hydrophone, which is arranged on the cooling mechanism to detect the frequency of flow noise when the cooling mechanism is in operation.

[0048] The ship power device provided in the embodiment of the present invention can be applied to ships, and the cooling mechanism can perform heat exchange through seawater, so in this embodiment, the liquid can be water.

[0049] The ship power unit provided by an embodiment of the present invention can convert the flow noise energy generated during the operation of the cooling system into mechanical vibration energy by providing a vibration absorber and a cooling system, and then reduce it through the vibration absorber, thereby effectively reducing the flow noise of the cooling system under different operating conditions.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A cooling system, characterized in that: include: a cooling mechanism, a resonance mechanism, a detection mechanism, and an adjustment mechanism, wherein the resonance mechanism is in communication with the cooling mechanism, the resonance mechanism having a cavity filled with gas, the detection mechanism being configured to detect the frequency of flow noise generated during operation of the cooling mechanism, and the adjustment mechanism being configured to adjust the volume of the gas in the cavity based on the frequency of the flow noise so that the resonance frequency of the cavity matches the frequency of the flow noise; The cooling mechanism includes: a cooler and a pump; the resonance mechanism includes: a conduit and a resonator, wherein the first end of the conduit is in communication with the cooler, and the second end of the conduit is in communication with the resonator; the resonator is provided with the cavity, and the cavity is in communication with the conduit; the resonator is connected to the regulating mechanism, and the regulating mechanism is used to regulate the volume of the gas in the cavity; The detection mechanism includes an electromagnetic level gauge, which is arranged on the conduit and is used to detect the liquid level of the liquid in the conduit, and the adjustment mechanism is used to adjust the volume of the gas in the resonator based on the liquid level; The detection mechanism also includes a memory, which stores a speed-frequency-liquid level database. The speed-frequency-liquid level database is a database established based on the speed of the pump, the frequency of the flow noise of the pump at the corresponding speed, and the liquid level of the liquid in the catheter corresponding to the frequency.

2. The cooling system according to claim 1, characterized in that The system further includes a controller, which is electrically connected to the detection mechanism and the adjustment mechanism. The controller is used to control the action of the adjustment mechanism according to the frequency of the flow noise detected by the detection mechanism.

3. The cooling system according to claim 1, characterized in that The cooling mechanism further includes: a first pipeline and a second pipeline, the first pipeline and the second pipeline are connected to the inlet side and the outlet side of the cooler respectively, and the pump is provided in the first pipeline.

4. The cooling system according to claim 1, wherein: The regulating mechanism includes: an air reservoir, an air intake pipe and an air intake valve. The air reservoir is connected to the resonator through the air intake pipe, and the air intake valve is arranged on the air intake pipe.

5. The cooling system according to claim 4, characterized in that The regulating mechanism further includes an air outlet pipe and an air outlet valve. The air outlet pipe is communicated with the resonator, and the air outlet valve is arranged on the air outlet pipe.

6. A ship power plant, characterized in that: The cooling system comprises a vibration absorber and the cooling system according to any one of claims 1 to 5, wherein the vibration absorber is used to reduce vibration of the cooling system.

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