Marine methanol engine cold start auxiliary system

Abstract

The invention discloses a marine methanol engine cold start auxiliary system which comprises a gas supply unit and a methanol fuel supply unit and further comprises a heat supply unit. Wherein the heat supply unit comprises a first shell, a heat supply cavity, a first circulation cavity and a second circulation cavity are formed in the first shell, a friction heat generation assembly is arranged in the heat supply cavity, the outer wall of a rotating shaft of the friction heat generation assembly is sleeved with an impeller, and a first pipe body assembly is arranged on the outer side of the friction heat generation assembly; and a second pipe body assembly is arranged in the second shell, a heating piece is arranged on the inner side of the second pipe body assembly, one end of the second pipe body assembly communicates with the gas circulation cavity and the fuel circulation cavity through a pipeline set, and the pipeline set further communicates with one end of the first pipe body assembly. According to the methanol engine, the introduced gas and methanol fuel are preheated through the heating piece, the heating piece can be closed subsequently, and the introduced gas and methanol fuel are preheated through heat generated by the friction heat generation assembly, so that stable operation of the methanol engine is guaranteed, and energy consumption is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of methanol engines, in particular to a cold start auxiliary system for a marine methanol engine. Background Art

[0002] Methanol fuel engines have been widely used in the fields of ships, automobiles, power generation, etc., especially in the field of ships. However, due to the relatively high latent heat of vaporization of methanol combustion and its non-volatile nature, methanol engines are difficult to start at low temperatures. To solve this problem, the air and methanol fuel introduced into the methanol engine are usually preheated by heating elements to improve the ignition success rate, thereby solving the problem of cold start difficulties. However, in order to ensure the stable operation of the engine in a low temperature environment, the temperature of the incoming air and methanol fuel must be maintained continuously, which requires the heating elements to work continuously, resulting in high energy consumption. For this reason, we propose a marine methanol engine cold start auxiliary system. Summary of the invention

[0003] The object of the present invention is to provide a marine methanol engine cold start auxiliary system to solve the problems raised in the above background technology.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A marine methanol engine cold start auxiliary system comprises a gas supply unit and a methanol fuel supply unit, and also comprises a heating unit;

[0006] Wherein, the heating unit comprises:

[0007] Shell 1, with a heat supply cavity, and a circulation cavity 1 and a circulation cavity 2 respectively connected to the gas supply unit and the methanol fuel supply unit, a friction heat generating component is provided in the heat supply cavity, the rotating shaft of the friction heat generating component extends into the circulation cavity 1 and the circulation cavity 2, and the outer walls of the rotating shafts located in the circulation cavity 1 and the circulation cavity 2 are sleeved with impellers, and a tube body component 1 is provided on the outer side of the friction heat generating component;

[0008] Shell 2 has a tube body assembly 2 inside for circulating gas and methanol fuel, a heating element is provided on the inner side of the tube body assembly 2, one end of the tube body assembly 2 is connected to a gas circulation cavity and a fuel circulation cavity through a pipeline group, and the pipeline group is also connected to one end of the tube body assembly 1, and both the tube body assembly 1 and the tube body assembly 2 are connected to a gas input pipe and a fuel input pipe for connecting to a methanol engine.

[0009] A further improvement is that the tube body component 1 includes a gas heat-conducting spiral tube 1 and a fuel heat-conducting spiral tube 1, and the tube body component 2 includes a gas heat-conducting spiral tube 2 and a fuel heat-conducting spiral tube 2;

[0010] The pipeline group includes a gas pipeline and a fuel pipeline respectively connected to one end of the circulation cavity 1 and one end of the circulation cavity 2, one end of the gas pipeline is respectively connected to the gas heat conduction spiral pipe 1 and the gas circulation branch pipe through a three-way valve, and one end of the fuel pipeline is respectively connected to the fuel heat conduction spiral pipe 1 and the fuel circulation branch pipe through a three-way valve;

[0011] A control valve 1 is respectively provided at the connection between the pipe body component 1, the pipe body component 2, the gas input pipe and the fuel input pipe.

[0012] A further improvement is that a temperature sensor is provided in the heating chamber, the temperature sensor is electrically connected to the engine ECU unit, and the engine ECU unit is electrically connected to the heating element, the three-way valve and the control valve 1;

[0013] When the temperature sensor detects that the temperature in the heating cavity reaches a first temperature threshold, it sends a signal to the engine ECU unit, so that the engine ECU unit controls the three-way valve to work, the control valve one at the second tube body component to close, the control valve one at the first tube body component to open, and the heating element to close. When the three-way valve is working, the gas pipeline and the fuel pipeline are connected to the gas heat-conducting spiral tube one and the fuel heat-conducting spiral tube one respectively.

[0014] A further improvement is that the heating element is a heating element with adjustable heating power, the other ends of the gas heat-conducting spiral tube 1 and the fuel heat-conducting spiral tube 1 are respectively connected to the gas heat-conducting spiral tube 2 and the fuel heat-conducting spiral tube 2 through interconnecting pipelines, and the interconnecting pipeline is provided with a control valve 2 electrically connected to the engine ECU unit;

[0015] When the temperature sensor detects that the temperature in the heating chamber reaches a second temperature threshold, it sends a signal to the engine ECU unit, so that the engine ECU unit controls the three-way valve to work, the control valve one at the second pipe body component to open, the control valve one at the first pipe body component to close, and the control valve two in the interconnecting pipeline to open, and at the same time reduces the heating power of the heating element, wherein the second temperature threshold is less than the first temperature threshold.

[0016] A further improvement is that the friction heat generating component comprises:

[0017] The friction member 1 is arranged on the rotating shaft;

[0018] The second friction member is fixedly arranged in the heating cavity and sleeved on the outer side of the first friction member.

[0019] According to the marine methanol engine cold start auxiliary system described in claim, it is characterized in that: the outer wall of the friction member 1 is provided with a plurality of groups of grooves, and a contact block for contacting the inner wall of the friction member 2 is movably provided in the groove, the contact block and the groove bottom are connected by an elastic member 1, the bottom of the contact block is hinged with a connecting arm, the other end of the connecting arm is hinged to the outer wall of the bearing seat, and the bearing seat is sleeved on the outer wall of the rotating shaft, a magnetic block is rotatably provided on one side of the bearing seat, and the bottom wall of the heating chamber is provided with an electromagnetic block 2;

[0020] At the first temperature threshold, the engine ECU unit controls the second electromagnetic block to be energized to attract the magnetic block, so that the bearing seat drives the contact block to separate from the second friction member through the connecting arm.

[0021] A further improvement is that the rotating shaft comprises:

[0022] The first shaft has a docking groove at one end, and one end of a docking column is inserted into the docking groove. The other end of the docking column is movably inserted into a movable groove at one end of the second shaft. The second shaft is rotatably arranged in the heating cavity, and a magnetic ring is rotatably sleeved on the outer wall of the second shaft.

[0023] An elastic connector connects the bottom of the movable groove and the other end of the docking column;

[0024] Electromagnetic block 1, arranged on the inner wall of the heating cavity, used for energizing and adsorbing the magnetic ring;

[0025] When the temperature sensor detects that the temperature in the heating cavity reaches a third temperature threshold, the engine ECU unit controls the electromagnetic block to cut off power, so that the elastic connector drives the docking column to separate from the docking slot, wherein the third temperature threshold is greater than the first temperature threshold.

[0026] A further improvement is that the inner wall of the tube body component 1 is provided with a plurality of sealing sleeves, and a heat conducting sheet is movably inserted in the sealing sleeve, the heat conducting sheet is connected with a movable frame, the movable frame is movably arranged outside the friction member 2, the movable frame is connected with a rod body, one end of the rod body is slidably abutted with a wedge block, the wedge block is arranged on the magnetic ring, and the outer wall of the rod body is provided with a spring member supporting it;

[0027] When the electromagnetic block 1 is powered off, the magnetic ring moves downward through the wedge block to drive the rod body to drive the movable frame to move outward, thereby driving the heat conducting sheet into the inner cavity of the second tube body component.

[0028] A further improvement is that the gas supply unit includes a supercharger, the output end of the supercharger is connected to the engine exhaust pipe and the external gas source through pipelines, and the output end of the supercharger is connected to the exhaust gas discharge pipe and the intake pipe connected to the flow chamber.

[0029] A further improvement is that the methanol fuel supply unit comprises a fuel tank, an output end of the fuel tank is provided with a pump body, and the pump body is connected with the second flow chamber through a feed pipe.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] 1) The present invention preheats the incoming gas and methanol fuel through the heating element of the heating unit to assist the cold start of the methanol engine, and when the gas and methanol fuel flow, the impeller drives the friction heat generating component to generate heat by friction. The heating element can be turned off later, and the heat generated by the friction heat generating component is used to preheat the incoming gas and methanol fuel to ensure the stable operation of the methanol engine, thereby reducing energy consumption and reducing the use cost;

[0032] 2) The present invention detects the temperature in the heating chamber by a temperature sensor. When the temperature in the heating chamber reaches a first threshold, the introduced gas and methanol fuel are preheated by heat generated by the friction heat generating component without using a heating element. When the temperature in the heating chamber reaches a second threshold, the heating power of the heating element can be lowered, and the introduced gas and methanol fuel are preheated by combining the friction heat generating component and the low heating power heating element, thereby further reducing energy consumption and ensuring stable startup and stable operation of the methanol engine.

[0033] 3) When the temperature in the heating chamber reaches a first threshold value, the present invention can reduce the contact area between friction member 1 and friction member 2 in the friction heat generating assembly. When the temperature in the heating chamber reaches a third threshold value, friction member 1 and friction member 2 stop rubbing to prevent the temperature in the heating chamber from continuing to rise and causing damage to the system, while ensuring the safe use of gas and methanol fuel. At the third threshold value, the heat conductive plate is simultaneously allowed to enter the pipeline assembly 1 to improve the heating quality of the gas or methanol fuel and further prevent the temperature in the heating chamber from rising. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the structure of the cold start auxiliary system of the present invention;

[0035] Figure 2 It is a three-dimensional diagram of the heating unit structure of the present invention;

[0036] Figure 3 It is a cross-sectional view of the heating unit structure of the present invention;

[0037] Figure 4 It is a structural cross-sectional view of the heating unit of the present invention from another perspective;

[0038] Figure 5 It is a schematic diagram of the partial structure of the inner cavity of the shell 1 and the shell 2 of the present invention;

[0039] Figure 6 For the present invention Figure 3A schematic diagram of the enlarged structure in the middle;

[0040] Figure 7 For the present invention Figure 4 A magnified schematic diagram of structure B in the middle.

[0041] In the figure: 100, gas supply unit; 101, supercharger; 200, methanol fuel supply unit; 201, fuel tank; 202, pump body; 300, engine ECU unit; 400, heating unit; 401, shell 1; 402, shell 2; 403, circulation cavity 1; 404, circulation cavity 2; 405, shaft 1; 406, docking column; 407, elastic connector; 408, shaft 2; 409, electromagnetic block 1; 410, impeller; 411, friction member 1; 412, friction member 2; 413, gas heat conduction spiral Tube 1; 414, fuel heat conduction spiral tube 1; 415, temperature sensor; 416, rod body; 417, sealing sleeve; 418, three-way valve; 419, gas circulation branch pipe; 420, fuel circulation branch pipe; 421, gas heat conduction spiral tube 2; 422, fuel heat conduction spiral tube 2; 423, heating element; 424, wedge block; 425, elastic element 1; 426, heat conducting sheet; 427, gas input pipe; 428, fuel input pipe; 429, interconnecting pipeline; 430, electromagnetic block 2; 431, contact block; 432, connecting arm. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] Example 1

[0044] Please see attached Figure 1 -Attached Figure 4 A marine methanol engine cold start auxiliary system includes a gas supply unit 100 and a methanol fuel supply unit 200, and also includes a heating unit 400. The application preheats the gas (usually air) and methanol fuel entering the methanol engine through the heating unit 400, so that the marine methanol engine can be started better. The preheated air and fuel temperatures are increased, the evaporation performance of methanol is significantly improved, the mixed gas is formed more evenly, and the ignition success rate is greatly improved, thereby effectively solving the problem of cold start difficulties;

[0045] The heating unit 400 includes:

[0046] The housing 1 401 has a heating chamber, and a circulation chamber 1 403 and a circulation chamber 2 404 respectively connected to the gas supply unit 100 and the methanol fuel supply unit 200. Specifically, the heating chamber is located below the circulation chamber 1 403 and the circulation chamber 2 404.

[0047] A friction heat generating component is arranged in the heating cavity, and the rotating shaft of the friction heat generating component extends into the circulation cavity 1 403 and the circulation cavity 2 404, and the outer wall of the rotating shaft located in the circulation cavity 1 403 and the circulation cavity 2 404 is sleeved with an impeller 410. When the gas supply unit 100 supplies gas or the methanol fuel supply unit 200 supplies methanol fuel, the impeller 410 will rotate, and then the impeller 410 drives the friction heat generating component to work, and heat is generated by friction of the friction heat generating component. A tube body component 1 is arranged on the outer side of the friction heat generating component;

[0048] The second shell 402 has a second tube assembly for gas and methanol fuel circulation therein, a heating element 423 is provided on the inner side of the second tube assembly, one end of the second tube assembly is connected to the gas circulation cavity and the fuel circulation cavity through a pipeline group, and the pipeline group is also connected to one end of the first tube assembly, and the first tube assembly and the second tube assembly are both connected to a gas input pipe 427 and a fuel input pipe 428 for connecting to a methanol engine;

[0049] The above-mentioned shell 1 401 and shell 2 402 are both made of heat-insulating materials, which will not be described in detail here;

[0050] In a low-temperature environment, the gas supplied by the gas supply unit 100 or the methanol fuel supplied by the methanol fuel supply unit 200 can drive the impeller 410 to rotate. The impeller 410 enables the friction heat generating component to work and generate heat. By controlling the gas and methanol fuel to enter the pipe body component 2 and turning on the heating element 423 at the same time, the gas and methanol fuel can be preheated, so that the gas and methanol fuel with a certain temperature enter the methanol engine through the gas input pipe 427 and the fuel input pipe 428 respectively, to assist the methanol engine to start quickly in a low-temperature environment. When the engine is working, the heating element 423 can be turned off together with the subsequent gas and methanol fuel entering the pipe body component 1, and the gas and methanol fuel can be preheated by the heat generated by the friction heat generating component to keep them at a suitable temperature, thereby ensuring the stable operation of the methanol engine.

[0051] Preferably, the gas supply unit 100 of this embodiment includes a supercharger 101, the output end of the supercharger 101 is connected to the engine exhaust pipe and the external gas source through pipelines, and the output end of the supercharger 101 is connected to the exhaust gas discharge pipe and the intake pipe connected to the flow chamber 403, respectively. The exhaust gas discharged from the engine exhaust pipe can be transported to the post-processing device or discharged to the atmosphere through the exhaust gas discharge pipe by the supercharger 101, and the supercharger 101 can also pressurize the external gas source (air filtered by the air filter) and discharge it into the flow chamber 403;

[0052] Preferably, the methanol fuel supply unit 200 of the present embodiment includes a fuel tank 201 , and a pump body 202 is provided at the output end of the fuel tank 201 , and the pump body 202 is connected to the second flow chamber 404 through a feed pipe.

[0053] Example 2

[0054] Please see attached Figure 1 -Attached Figure 5 On the basis of Example 1, the tube body component 1 of this embodiment includes a gas heat-conducting spiral tube 1 413 and a fuel heat-conducting spiral tube 1 414, and the tube body component 2 includes a gas heat-conducting spiral tube 2 421 and a fuel heat-conducting spiral tube 2 422;

[0055] The pipeline group includes a gas pipeline and a fuel pipeline respectively connected to one end of the circulation chamber 1 403 and one end of the circulation chamber 2 404. One end of the gas pipeline is respectively connected to the gas heat conduction spiral pipe 1 413 and the gas circulation branch pipe 419 through a three-way valve 418, and one end of the fuel pipeline is respectively connected to the fuel heat conduction spiral pipe 1 414 and the fuel circulation branch pipe 420 through a three-way valve 418. The above-mentioned three-way valve 418 is, for example, an electric three-way diverter valve, an electric three-way ball valve or an electric three-way butterfly valve.

[0056] The connection between the pipe body component 1, the pipe body component 2, the gas input pipe 427 and the fuel input pipe 428 is respectively provided with a control valve 1, which is, for example, a solenoid valve or a manual control valve;

[0057] In a low temperature environment, the gas and methanol fuel discharged from the circulation cavity 1 403 and the circulation cavity 2 404 enter the gas pipeline and the fuel pipeline respectively. By controlling the three-way valve 418 at the corresponding position, the gas and methanol fuel can enter the gas circulation branch pipe 419 and the fuel circulation branch pipe 420 (without entering the gas heat-conducting spiral pipe 1 413 and the fuel heat-conducting spiral pipe 1 414), and then enter the gas heat-conducting spiral pipe 2 421 and the fuel heat-conducting spiral pipe 2 422. The gas and methanol fuel are preheated by the heating element 423 when flowing in the gas heat-conducting spiral pipe 2 421 and the fuel heat-conducting spiral pipe 2 422, and then the corresponding control valve 1 is opened to allow the preheated gas and methanol fuel to enter the methanol engine to assist the start-up of the methanol engine;

[0058] When the methanol engine is running subsequently or the friction heat generating component reaches the required temperature, the heating element 423 can be turned off, and the gas and methanol fuel discharged from the circulation cavity 1 403 and the circulation cavity 2 404 enter the gas pipeline and the fuel pipeline respectively. By controlling the three-way valve 418 at the corresponding position, the gas and methanol fuel can enter the gas heat conducting spiral tube 1 413 and the fuel heat conducting spiral tube 1 414. When the gas and methanol fuel flow in the gas heat conducting spiral tube 1 413 and the fuel heat conducting spiral tube 1 414, they are preheated by the heat generated by the friction heat generating component, and then the corresponding control valve 1 is opened to allow the preheated gas and methanol fuel to enter the methanol engine, so that the methanol engine can run more stably. If the methanol engine is not started at this time, it also plays a role in assisting the start of the methanol engine.

[0059] Preferably, a temperature sensor 415 is provided in the heating chamber of the present embodiment, for example, a temperature sensor of model DS18B20 is used, but it is certainly not limited to this model. The temperature sensor 415 is electrically connected to the engine ECU unit 300, and the engine ECU unit 300 is electrically connected to the heating element 423, the three-way valve 418 and the control valve 1. The engine ECU unit 300 belongs to the conventional structure in this field and will not be described in detail here.

[0060] When the temperature sensor 415 detects that the temperature in the heating cavity reaches the first temperature threshold, it sends a signal to the engine ECU unit 300, so that the engine ECU unit 300 controls the three-way valve 418 to work, the control valve 1 at the second pipe assembly to close, the control valve 1 at the first pipe assembly to open, and the heating element 423 to close, wherein when the three-way valve 418 works, the gas pipeline and the fuel pipeline are connected to the gas heat-conducting spiral tube 1 413 and the fuel heat-conducting spiral tube 1 414 respectively;

[0061] When the temperature generated by the friction heat generating component reaches the first temperature threshold, the temperature sensor 415 sends a control signal to the engine ECU unit 300, so that the engine ECU unit 300 controls the corresponding three-way valve 418 and the control valve 1, and controls the heating element 423 to be closed, so that the gas and methanol fuel discharged from the circulation chamber 1 403 and the circulation chamber 2 404 enter the gas pipeline and the fuel pipeline respectively, and then enter the gas heat conducting spiral tube 1 413 and the fuel heat conducting spiral tube 1 414, and are preheated by the heat generated by the friction heat generating component. Then, the preheated gas and methanol fuel enter the methanol engine. In this state, the heating element 423 does not work, which effectively reduces energy consumption and use costs;

[0062] When the temperature generated by the friction heat generating component does not reach the first temperature threshold, the gas and methanol fuel discharged from the circulation chamber 1 403 and the circulation chamber 2 404 enter the gas circulation branch pipe 419 and the fuel circulation branch pipe 420, and then enter the gas heat conducting spiral tube 2 421 and the fuel heat conducting spiral tube 2 422 to be preheated by the heating element 423. The preheated gas and methanol fuel enter the methanol engine.

[0063] Preferably, the heating element 423 of this embodiment is a heating element with adjustable heating power, such as an electric heater, etc. The other ends of the gas heat-conducting spiral tube 1 413 and the fuel heat-conducting spiral tube 1 414 are respectively connected to the gas heat-conducting spiral tube 2 421 and the fuel heat-conducting spiral tube 2 422 through an interconnecting pipeline 429, and a control valve 2 electrically connected to the engine ECU unit 300 is provided in the interconnecting pipeline 429, such as a solenoid valve;

[0064] When the temperature sensor 415 detects that the temperature in the heating cavity reaches the second temperature threshold, it sends a signal to the engine ECU unit 300, so that the engine ECU unit 300 controls the three-way valve 418 to work, the control valve 1 at the second pipe assembly to open, the control valve 1 at the first pipe assembly to close, and the control valve 2 in the interconnecting pipeline 429 to open, and at the same time reduces the heating power of the heating element 423, specifically, by changing the input voltage to reduce the power of the heating element 423, wherein the second temperature threshold is less than the first temperature threshold;

[0065] When the temperature generated by the friction heat generating component reaches the second temperature threshold (at this time, the gas and methanol fuel cannot reach the preheating temperature), the temperature sensor 415 sends a control signal to the engine ECU unit 300, so that the engine ECU unit 300 controls the corresponding three-way valve 418, control valve one and control valve two, and lowers the heating power of the heating element 423, so that the gas and methanol fuel discharged from the circulation cavity 1 403 and the circulation cavity 2 404 enter the gas pipeline and the fuel pipeline respectively, and then enter the gas heat conducting spiral tube 1 413 and the fuel heat conducting spiral tube 1 414, and are preheated once by the heat generated by the friction heat generating component. Subsequently, the preheated gas and methanol fuel enter the gas heat conducting spiral tube 2 421 and the fuel heat conducting spiral tube 2 422 respectively through the interconnecting pipeline 429, and are preheated twice by the heating element 423, so that the heated gas and methanol fuel reach the required preheating temperature and enter the methanol engine, thereby further reducing energy consumption;

[0066] It should be noted that the gas circulation branch pipe 419, the fuel circulation branch pipe 420 and the interconnecting pipe 429 are also provided with a one-way valve to prevent the gas and methanol fuel from flowing back.

[0067] Example 3

[0068] Please see attached Figure 3 -Attached Figure 5 Based on embodiments 1 and 2, the friction heat generating component of this embodiment includes:

[0069] The friction member 411 is disposed on the rotating shaft, and the friction member 411 is, for example, a cylinder;

[0070] The second friction member 412 is fixedly disposed in the heating chamber and sleeved on the outer side of the first friction member 411. The second friction member 412 is, for example, a circular ring;

[0071] The friction member 1 411 and the friction member 2 412 are preferably made of metal materials. When the impeller 410 rotates, the friction member 1 411 is driven to rotate relative to the friction member 2 412 , thereby generating heat through friction between the friction member 1 411 and the friction member 2 412 .

[0072] Example 4

[0073] Please see attached Figure 3 -Attached Figure 5 On the basis of the third embodiment, the outer wall of the friction member 1 411 of the present embodiment is provided with a plurality of grooves, and a contact block 431 for contacting the inner wall of the friction member 2 412 is movably provided in the groove. The contact block 431 is made of the same material as the friction member 1 411 and is slidably provided in the groove;

[0074] The contact block 431 and the bottom of the groove are connected by an elastic member 425 (such as a spring), a connecting arm 432 is hinged at the bottom of the contact block 431, and a movable opening for the connecting arm 432 to move is provided at the bottom of the friction member 411, the other end of the connecting arm 432 is hinged to the outer wall of the bearing seat, and the bearing seat is sleeved on the outer wall of the shaft, the bearing seat rotates with the shaft, a magnetic block is rotatably provided on one side of the bearing seat, the magnetic block and the bearing seat can be connected by a bearing, and an electromagnetic block 430 is provided on the bottom wall of the heating chamber;

[0075] At the first temperature threshold, the engine ECU unit 300 controls the second electromagnetic block 430 to energize and attract the magnetic block, so that the bearing seat drives the contact block 431 to separate from the second friction member 412 through the connecting arm 432, wherein the third temperature threshold is greater than the first temperature threshold;

[0076] Because gas and methanol fuel continue to enter, when the heating chamber reaches the first temperature threshold, friction member 1 411 and friction member 2 412 continue to generate heat through friction. At the same time, because the heating chamber is sealed, in order to protect shell 1 401, when the temperature in the heating chamber reaches the first temperature threshold, electromagnetic block 2 430 works to separate contact block 431 from the inner wall of friction member 2 412, reducing the contact area between friction member 1 411 and friction member 2 412, so that the temperature of the heating chamber is reduced and will not continue to rise.

[0077] Example 5

[0078] Please see attached Figure 6 , based on Example 4, the rotating shaft of this embodiment includes:

[0079] The shaft portion 405 is specifically connected to the impeller 410, and one end of the shaft portion 405 is provided with a docking groove, and one end of a docking column 406 is inserted into the docking groove, and the other end of the docking column 406 is movably inserted into the movable groove provided at one end of the shaft portion 408. The cross-sections of the docking column 406 and the docking groove are both rectangular. In normal use, the docking column 406 connects the shaft portion 405 and the shaft portion 408. When the impeller 410 rotates, the shaft portion 405 is driven, and the shaft portion 405 drives the shaft portion 408 through the docking column 406. The shaft portion 408 drives the friction member 411 and the friction member 412 to generate heat by friction. The shaft portion 408 is rotatably arranged in the heating cavity through a bearing, and the shaft portion 408 is specifically connected to the friction member 411. The outer wall of the shaft portion 408 is provided with a magnetic ring through a bearing rotation sleeve, and the magnetic ring is specifically located above the friction member 411.

[0080] An elastic connecting member 407 (such as a spring) connects the bottom of the movable groove and the other end of the docking column 406;

[0081] An electromagnetic block 409 is arranged on the inner wall of the heating chamber and is used for energizing and adsorbing the magnetic ring;

[0082] When the temperature sensor 415 detects that the temperature in the heating cavity reaches a third temperature threshold, the engine ECU unit 300 controls the electromagnetic block 1 409 to cut off the power, so that the elastic connector 407 drives the docking column 406 to separate from the docking slot, wherein the third temperature threshold is greater than the first temperature threshold;

[0083] When the docking post 406 is separated from the docking groove, the impeller 410 drives the shaft 1 405 to rotate, and the shaft 1 405 cannot drive the shaft 2 408 to rotate through the docking post 406, so that the friction member 1 411 does not rotate relative to the friction member 2 412. At this time, the friction heat generating component does not generate heat, so as to better protect the housing 1 401;

[0084] Please see attached Figure 7As a preferred embodiment, the inner wall of the tube body component 1 (gas heat-conducting spiral tube 1 413 and fuel heat-conducting spiral tube 1 414) of this embodiment is inserted with a plurality of groups of sealing sleeves 417, the sealing sleeve 417 is fixed to the inner wall of the tube body component 1, and a heat-conducting sheet 426 is movably inserted in the sealing sleeve 417, and the heat-conducting sheet 426 is connected to a movable frame. The heat-conducting sheet 426 can be made of metal material, one end of the heat-conducting sheet 426 is in the sealing sleeve 417, and the other end extends to the outside of the sealing sleeve 417, and the movable frame is movable. The movable frame is arranged outside the friction member 412, and a rod body 416 is connected to the movable frame. One end of the rod body 416 is slidably abutted against a wedge block 424. The vertical section of the wedge block 424 is a right-angle trapezoid. A ball can be embedded at one end of the rod body 416. The inclined surface of the wedge block 424 is provided with a ball groove that matches the ball. The wedge block 424 is arranged on the magnetic ring. The outer wall of the rod body 416 is sleeved with a spring member (such as a spring) supporting it. One end of the spring member is connected to the outer wall of the rod body 416, and the other end is connected to the inner wall of the friction member 412.

[0085] When the electromagnetic block 1 409 is powered off, the magnetic ring moves downward through the wedge block 424 to drive the rod 416 to drive the movable frame to move outward, thereby driving the heat conducting sheet 426 to enter the inner cavity of the tube assembly 2;

[0086] When the temperature in the heating chamber does not reach the third temperature threshold, the end of the heat conductive sheet 426 in the sealing sleeve 417 does not enter the gas heat conductive spiral tube 413 or the fuel heat conductive spiral tube 414, but the heat conductive sheet 426 can still effectively transfer the heat generated by the friction heat generating component to the gas or methanol fuel flowing in the tube; when the temperature in the heating chamber reaches the third temperature threshold, the docking column 406, under the action of the elastic connecting member 407, causes the magnetic ring to move downward, and then the magnetic ring drives the wedge block 424 downward, and the wedge block 424 causes the rod body 416 to drive the movable frame to move, and the movable frame causes the heat conductive sheet 426 to enter the inner cavity of the tube body component. On the one hand, the contact area between the heat conductive sheet 426 and the flowing gas or methanol fuel is increased, so that the gas or methanol fuel is better heated, and on the other hand, the flow speed of the gas or methanol fuel in the pipeline can be reduced, so that the gas or methanol fuel flows in the heating chamber for a longer time, thereby improving the heating quality of the gas or methanol fuel.

[0087] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A marine methanol engine cold start auxiliary system, comprising a gas supply unit (100) and a methanol fuel supply unit (200), characterized in that: Also includes a heating unit (400); Wherein, the heating unit (400) comprises: A shell (401) is provided with a heat supply cavity, and a circulation cavity (403) and a circulation cavity (404) respectively connected to a gas supply unit (100) and a methanol fuel supply unit (200). A friction heat generating component is provided in the heat supply cavity. The rotating shaft of the friction heat generating component extends into the circulation cavity (403) and the circulation cavity (404). The outer walls of the rotating shafts located in the circulation cavity (403) and the circulation cavity (404) are both sleeved with impellers (410). A tube body component (1) is provided on the outer side of the friction heat generating component. Shell 2 (402) has a tube assembly 2 for circulating gas and methanol fuel inside, a heating element (423) is provided on the inner side of the tube assembly 2, one end of the tube assembly 2 is connected to a gas circulation cavity and a fuel circulation cavity through a pipeline group, and the pipeline group is also connected to one end of the tube assembly 1, and the tube assembly 1 and the tube assembly 2 are both connected to a gas input pipe (427) and a fuel input pipe (428) for connecting to a methanol engine.

2. A marine methanol engine cold start auxiliary system according to claim 1, characterized in that: The tube body component 1 includes a gas heat-conducting spiral tube 1 (413) and a fuel heat-conducting spiral tube 1 (414), and the tube body component 2 includes a gas heat-conducting spiral tube 2 (421) and a fuel heat-conducting spiral tube 2 (422); The pipeline group comprises a gas pipeline and a fuel pipeline respectively connected to one end of the circulation cavity 1 (403) and one end of the circulation cavity 2 (404); one end of the gas pipeline is respectively connected to the gas heat conduction spiral tube 1 (413) and the gas circulation branch tube (419) through a three-way valve (418); one end of the fuel pipeline is respectively connected to the fuel heat conduction spiral tube 1 (414) and the fuel circulation branch tube (420) through a three-way valve (418); A control valve 1 is provided at the connection points between the pipe body component 1, the pipe body component 2, the gas input pipe (427) and the fuel input pipe (428), respectively.

3. A marine methanol engine cold start auxiliary system according to claim 2, characterized in that: A temperature sensor (415) is provided in the heating chamber, the temperature sensor (415) is electrically connected to the engine ECU unit (300), and the engine ECU unit (300) is electrically connected to the heating element (423), the three-way valve (418) and the control valve 1; When the temperature sensor (415) detects that the temperature in the heating chamber reaches a first temperature threshold, it sends a signal to the engine ECU unit (300), so that the engine ECU unit (300) controls the three-way valve (418) to operate, the control valve one at the second pipe assembly to close, the control valve one at the first pipe assembly to open, and the heating element (423) to close, wherein when the three-way valve (418) operates, the gas pipeline and the fuel pipeline are connected to the gas heat-conducting spiral tube one (413) and the fuel heat-conducting spiral tube one (414) respectively.

4. A marine methanol engine cold start auxiliary system according to claim 3, characterized in that: The heating element (423) is a heating element (423) with adjustable heating power. The other ends of the gas heat-conducting spiral tube (413) and the fuel heat-conducting spiral tube (414) are respectively connected to the gas heat-conducting spiral tube (421) and the fuel heat-conducting spiral tube (422) through an interconnecting pipeline (429). The interconnecting pipeline (429) is provided with a control valve (2) electrically connected to the engine ECU unit (300). When the temperature sensor (415) detects that the temperature in the heating chamber reaches a second temperature threshold, it sends a signal to the engine ECU unit (300), so that the engine ECU unit (300) controls the three-way valve (418) to work, the control valve one at the second pipe assembly to open, the control valve one at the first pipe assembly to close, and the control valve two in the interconnecting pipeline (429) to open, and at the same time reduces the heating power of the heating element (423), wherein the second temperature threshold is less than the first temperature threshold.

5. A marine methanol engine cold start auxiliary system according to claim 4, characterized in that: The friction heat generating component comprises: A friction member 1 (411) is disposed on the rotating shaft; The second friction member (412) is fixedly arranged in the heating chamber and sleeved on the outer side of the first friction member (411).

6. A marine methanol engine cold start auxiliary system according to claim 5, characterized in that: The outer wall of the friction member 1 (411) is provided with a plurality of groups of grooves, and a contact block (431) for contacting the inner wall of the friction member 2 (412) is movably provided in the groove, the contact block (431) and the groove bottom of the groove are connected via an elastic member 1 (425), a connecting arm (432) is hinged at the bottom of the contact block (431), the other end of the connecting arm (432) is hinged on the outer wall of the bearing seat, and the bearing seat is sleeved on the outer wall of the rotating shaft, a magnetic block is rotatably provided on one side of the bearing seat, and an electromagnetic block 2 (430) is provided on the bottom wall of the heating chamber; At the first temperature threshold, the engine ECU unit (300) controls the second electromagnetic block (430) to be energized to attract the magnetic block, so that the bearing seat drives the contact block (431) to separate from the second friction member (412) through the connecting arm (432).

7. A marine methanol engine cold start auxiliary system according to claim 5, characterized in that: The rotating shaft comprises: The first shaft (405) has a docking groove at one end, and one end of a docking column (406) is inserted into the docking groove. The other end of the docking column (406) is movably inserted into a movable groove at one end of the second shaft (408). The second shaft (408) is rotatably arranged in the heating chamber, and a magnetic ring is rotatably sleeved on the outer wall of the second shaft (408); An elastic connecting member (407) connecting the bottom of the movable groove and the other end of the docking column (406); Electromagnetic block 1 (409), arranged on the inner wall of the heating chamber, for energizing and adsorbing the magnetic ring; When the temperature sensor (415) detects that the temperature in the heating chamber reaches a third temperature threshold, the engine ECU unit (300) controls the electromagnetic block 1 (409) to cut off power, so that the elastic connecting member (407) drives the docking column (406) to disengage from the docking slot, wherein the third temperature threshold is greater than the first temperature threshold.

8. A marine methanol engine cold start auxiliary system according to claim 7, characterized in that: The inner wall of the tube body component 1 is provided with a plurality of sealing sleeves (417), and a heat conducting sheet (426) is movably inserted in the sealing sleeve (417), the heat conducting sheet (426) is connected with a movable frame, the movable frame is movably arranged outside the friction member 2 (412), the movable frame is connected with a rod body (416), one end of the rod body (416) is slidably abutted with a wedge block (424), the wedge block (424) is arranged on the magnetic ring, and the outer wall of the rod body (416) is provided with a spring member for supporting it; When the electromagnetic block 1 (409) is powered off, the magnetic ring moves downward through the wedge block (424) to drive the rod body (416) to drive the movable frame to move outward, thereby driving the heat conducting plate (426) to enter the inner cavity of the tube body component 2.

9. A marine methanol engine cold start auxiliary system according to claim 1, characterized in that: The gas supply unit (100) comprises a supercharger (101), the output end of the supercharger (101) being connected to an engine exhaust pipe and an external gas source through pipelines, and the output end of the supercharger (101) being connected to an exhaust gas discharge pipe and an intake pipe connected to a flow chamber (403).

10. A marine methanol engine cold start auxiliary system according to claim 1, characterized in that: The methanol fuel supply unit (200) comprises a fuel tank (201), the output end of the fuel tank (201) is provided with a pump body (202), and the pump body (202) is connected to the second circulation chamber (404) through a feed pipe.

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