Silent diesel generating set used in low-temperature environment

Abstract

The invention belongs to the technical field of diesel generating sets, and mainly discloses a silent diesel generating set used in a low-temperature environment. The problem that self-starting load is increased due to initial connection of an output shaft of a diesel engine and an input shaft of a generator is solved. Comprising a mounting base, the mounting base is provided with a sound insulation shell, the mounting base is fixedly connected with a diesel engine and a generator, an output shaft of the diesel engine is fixedly connected with a fixing column, the fixing column is in spline connection with a sliding shell, a limiting block is slidably connected in the sliding shell, and an input shaft of the generator is fixedly connected with a connecting column. And the connecting column is rotationally connected with a rotating disc. By moving the position of the sliding shell, the limiting block and the rotating disc are connected and matched, meanwhile, the mute working state of the device is guaranteed through the sound insulation shell, the purpose that the output shaft of the diesel engine and the input shaft of the generator are initially disconnected is achieved, preheating is conducted only by independently rotating the diesel engine, and the rotating load of the output shaft of the diesel engine is reduced; and additional abrasion of the diesel engine is avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of diesel generator sets, and mainly discloses a silent diesel generator set used in a low-temperature environment. Background Art

[0002] A diesel generator set is a mechanical device that can convert the chemical energy of diesel into electrical energy. It is widely used in various occasions as a backup power source or main power source. When a silent diesel generator set is initially started in a low-temperature environment, the diesel engine is usually started first to make it rotate at a low speed for preheating. When the temperature of the diesel engine rises to the set value, the diesel engine begins to rotate steadily and drives the generator to generate electricity. However, since the output shaft of the diesel engine is connected to the input shaft of the generator through a flange when the diesel engine is initially started, the load of the generator startup is entirely applied to the output shaft of the diesel engine, which increases the starting shock experienced by the diesel engine at the initial start-up, thereby increasing the possibility of damage to the diesel engine. In addition, during the preheating process of the diesel engine, the diesel engine needs to transfer part of its energy to the generator to make the generator rotate synchronously, which also affects the preheating effect of the diesel engine. Therefore, it is necessary to invent a silent diesel generator set with the function of disconnecting the initial diesel engine output shaft from the generator input shaft. Summary of the invention

[0003] In order to solve the problem that the diesel engine output shaft has an increased starting load due to its initial connection with the generator input shaft, the present invention provides a silent diesel generator set for use in a low-temperature environment.

[0004] The technical implementation scheme of the present invention is: a silent diesel generator set for low temperature environment, including a mounting seat, a sound insulation shell is installed on the mounting seat, a diesel engine and a generator are fixedly connected to the mounting seat, the sound insulation shell is provided with evenly distributed exhaust holes and evenly distributed air intake holes, the air intake holes of the sound insulation shell are fixedly connected with evenly distributed first sound insulation boards, the output shaft of the diesel engine is fixedly connected with a fixed column, the fixed column is spline-connected with a sliding shell, the sliding shell is slidably connected with a limited block, the input shaft of the generator is fixedly connected with a connecting column, the The connecting column is rotatably connected to a rotating disk, the connecting column is fixedly connected to a fixed plate slidably connected to the rotating disk, a spring is fixedly connected between the fixed plate and the rotating disk, the connecting column is slidably connected to a sliding block that is squeezed and matched with the rotating disk through a connecting frame, the rotating disk is provided with a through hole that is limitedly matched with the limit block, the through hole of the rotating disk is slidably connected to a transmission block that is squeezed and matched with the sliding block, the transmission block is squeezed and matched with the limit block, and the diesel engine is provided with a transmission control mechanism for driving the generator input shaft to rotate.

[0005] As a preferred embodiment of the present invention, the cross-sectional shape of the exhaust hole on the sound insulation shell is wavy, which is used to reflect and reduce the size of the sound waves passing therethrough.

[0006] As a preferred embodiment of the present invention, the cross-sectional shape of the first sound insulation board is arc-shaped, the concave surface of the first sound insulation board faces downward, and the projection area of ​​the first sound insulation board in the vertical direction is larger than the cross-sectional area of ​​the air inlet hole of the sound insulation shell, so as to reduce the size of the sound waves passing through the air inlet hole of the sound insulation shell.

[0007] As a preferred embodiment of the present invention, a slope is provided on a side of the sliding block close to the rotating disk, and the slope of the sliding block is extrusion-fitted with the through hole of the rotating disk, so that the sliding block is synchronously reset when the rotating disk is reset.

[0008] As a preferred embodiment of the present invention, the transmission control mechanism includes an electric push rod, which is fixedly connected to the diesel engine near its output shaft, and the telescopic end of the electric push rod is fixedly connected to a connecting plate which is connected to the sliding shell for limiting rotation, a temperature detection device is provided at the circulation point of the engine oil and coolant in the diesel engine, the exhaust pipe and the intake pipe of the diesel engine both penetrate the sound insulation shell, a spring is fixedly connected between the sliding shell and the limit block, a spring is fixedly connected between the sliding block and the connecting column, a speed detection component for detecting the rotation speed of the generator input shaft is provided on the connecting column, and a connecting component for moving the position of the sliding shell is provided on the connecting plate.

[0009] As a preferred embodiment of the present invention, the speed detection assembly includes a fixed shell, the fixed shell is fixedly connected to a side of the connecting column close to the generator, a centrifugal block uniformly distributed circumferentially is slidably connected in the fixed shell, a spring is fixedly connected between the centrifugal block and the fixed shell, a guide cavity is provided in the connecting column, the guide cavity is connected to the fixed shell through circumferentially distributed guide holes, a connecting ring is rotatably connected to the connecting column, an annular cavity is provided in the connecting ring, the guide cavity is connected to the annular cavity of the connecting ring through symmetrically distributed guide holes, and the guide cavity and the annular cavity of the connecting ring are both filled with hydraulic oil.

[0010] As a preferred embodiment of the present invention, the connecting assembly includes a connecting cylinder, the connecting cylinder is fixedly connected to the connecting plate, a piston rod is slidably connected in the connecting cylinder, a side of the connecting cylinder close to the diesel engine is connected to a first guide pipe connected to the annular cavity of the connecting ring, a side of the connecting cylinder away from the diesel engine is slidably connected to a limit pin, a blind hole that cooperates with the limit pin is provided on the piston rod, a spring is fixedly connected between the connecting cylinder and the limit pin, a sliding ring is splined on the sliding shell, and the piston rod is limited and slidable with the sliding ring through a mounting block The sliding ring is fixedly connected with a mirror-image extrusion plate, a side of the extrusion plate away from the sliding ring is provided with an inclined surface, the sliding shell is slidably connected with a mirror-image connecting rod, a tension spring is fixedly connected between the connecting rod and the sliding shell, the connecting rod is provided with a rectangular hole that is extruded and matched with the corresponding extrusion plate, the end of the connecting column close to the diesel engine is provided with circumferentially uniformly distributed grooves, the connecting rod is limitedly matched with adjacent grooves on the connecting column, and hydraulic oil is filled between the side of the connecting cylinder close to the diesel engine and the piston rod and in the first guide tube.

[0011] As a preferred embodiment of the present invention, it also includes an exhaust gas guiding mechanism, which is arranged on the upper side of the sound insulation shell, and is used for recycling the heat in the exhaust gas. The exhaust gas guiding mechanism includes an air guide shell, and the air guide shell is fixedly connected to the upper side of the sound insulation shell. A filtering device is fixedly connected in the air guide shell, and the air guide shell is connected to the exhaust pipe of the diesel engine. One side of the air guide shell is connected to an air guide pipe, and the air guide pipe is inserted into the sound insulation shell. The air guide pipe is fixedly connected to an air supply pipe connected to the intake pipe of the diesel engine, and the air supply pipe penetrates the air guide pipe, and the part of the air supply pipe located in the air guide pipe is spiral, and an auxiliary preheating component for controlling the connection state of the air guide pipe is provided on the upper side surface of the sound insulation shell.

[0012] As a preferred embodiment of the present invention, the auxiliary preheating assembly includes a connecting block, the connecting block is fixedly connected to the upper side surface inside the sound insulation shell, the connecting block is fixedly connected to the air guide pipe, the connecting block is provided with a through hole communicating with the air guide pipe, the upper side surface inside the sound insulation shell is fixedly connected to a first hydraulic cylinder, the first hydraulic cylinder is connected to a second air guide pipe communicating with the first air guide pipe, the telescopic end of the first hydraulic cylinder is fixedly connected to a sliding plate slidably connected to the connecting block, the sliding plate is provided with a through hole communicating and cooperating with the through hole of the connecting block, the sliding plate is fixedly connected to a baffle plate via a connecting frame, the baffle plate is provided with a through hole communicating and cooperating with the air guide pipe, and the first hydraulic cylinder and the second air guide pipe are both filled with hydraulic oil.

[0013] As a preferred embodiment of the present invention, an auxiliary sound insulation mechanism is further included, which is arranged on a side of the sound insulation shell close to the diesel engine, and is used to temporarily block the sound transmission of the exhaust hole of the sound insulation shell. The auxiliary sound insulation mechanism includes a second hydraulic cylinder, which is fixedly connected to a side of the sound insulation shell close to the diesel engine, and a connecting frame is fixedly connected to the telescopic end of the second hydraulic cylinder. The second hydraulic cylinder is connected to a third guide pipe connected to the side of the connecting cylinder away from the diesel engine, and a uniformly distributed second sound insulation board is fixedly connected to the connecting frame. The second sound insulation board and the first sound insulation board have exactly the same shape and function, and hydraulic oil is filled between the side of the connecting cylinder away from the diesel engine and the piston rod, and in the second hydraulic cylinder and the third guide pipe.

[0014] Compared with the prior art, the present invention has at least the following advantages: 1. The present invention moves the position of the sliding shell so that the limit block and the rotating disk are connected and matched. At the same time, the sound insulation shell ensures the silent working state of the device, thereby achieving the purpose of initially disconnecting the output shaft of the diesel engine and the input shaft of the generator, and only allowing the diesel engine to rotate alone for preheating, thereby reducing the rotational load of the diesel engine output shaft and avoiding additional wear of the diesel engine.

[0015] 2. The present invention drives the rotating disk to rotate intermittently through the rotating upper limit block of the sliding shell, so that the rotation speed of the generator input shaft is gradually increased to the rotation speed of the diesel engine output shaft, thereby achieving the purpose of stable connection between the diesel engine output shaft and the generator input shaft, and greatly reducing the impact force when the diesel engine output shaft and the generator input shaft are connected.

[0016] 3. The present invention changes the matching state of the extrusion plate and the connecting rod by moving the position of the sliding ring in the connecting assembly, so that the output shaft of the diesel engine and the input shaft of the generator are rigidly transmitted through the connecting rod after the speed is stabilized, thereby improving the stability of power transmission between the diesel engine and the generator.

[0017] 4. The present invention guides the flow of exhaust gas through the air guide shell and the air guide pipe in the exhaust gas guide mechanism, so that the exhaust gas quickly increases the temperature in the sound insulation shell, accelerates the preheating speed of the diesel engine and the generator, and shortens the start-up preheating time of the device in a low temperature environment.

[0018] 5. The present invention drives a plurality of second sound insulation plates to move through the connecting frame in the auxiliary sound insulation mechanism, so that when the diesel engine initially starts and generates strong noise, the sound insulation effect at the exhaust hole of the sound insulation shell is temporarily enhanced, thereby ensuring the stability of the silent working state of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2It is a three-dimensional structural schematic diagram of the parts of the diesel engine and the generator of the present invention; Figure 3 It is a cross-sectional view of the parts of the mounting seat and the sound insulation shell of the present invention; Figure 4 It is a three-dimensional structural schematic diagram of the parts at the fixing column and the connecting column of the present invention; Figure 5 It is a three-dimensional structural schematic diagram of the parts of the fixed column and the sliding shell of the present invention; Figure 6 It is a three-dimensional structural schematic diagram of the parts at the rotating disk and the fixed plate of the present invention; Figure 7 It is a cross-sectional view of the parts of the fixed shell and the connecting ring of the present invention; Figure 8 It is a three-dimensional structural schematic diagram of the parts at the first flow guide pipe and the connecting rod of the present invention; Fig. 9 It is a three-dimensional structural schematic diagram of the parts at the extrusion plate and the connecting rod of the present invention; Fig.10 It is a cross-sectional view of the parts of the air guide housing and the air guide pipe of the present invention; Fig.11 It is a three-dimensional structural schematic diagram of the parts at the sliding plate and the baffle of the present invention; Fig.12 It is a three-dimensional structural schematic diagram of the parts at the connection frame and the second sound insulation board of the present invention.

[0020] The reference numbers in the figure are: 1-mounting seat, 2-soundproof shell, 3-diesel engine, 4-generator, 5-first soundproof board, 6-fixed column, 7-sliding shell, 8-limiting block, 9-connecting column, 10-rotating plate, 11-fixed plate, 12-sliding block, 13-transmission block, 201-electric push rod, 202-connecting plate, 301-fixed shell, 302-centrifugal block, 303-guiding chamber, 304-connecting ring, 401-connecting cylinder, 402-piston rod, 403-first flow guide pipe, 404-limiting pin, 405-sliding ring, 406-extrusion plate, 407-connecting rod, 501-air guide shell, 502-filtering device, 503-air guide pipe, 504-air supply pipe, 601-connecting block, 602-first hydraulic cylinder, 603-second flow guide pipe, 604-sliding plate, 605-baffle, 701-second hydraulic cylinder, 702-connecting frame, 703-third flow guide pipe, 704-second sound insulation board. DETAILED DESCRIPTION

[0021] The following is combined with Figure 1-Figure 12, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0022] Example 1: When a diesel generator set is initially started in a low-temperature environment, it is necessary to start the diesel engine first and allow the diesel engine to preheat by rotating at a low speed. Since the output shaft of the diesel engine and the input shaft of the generator are initially flange-connected, the load of the generator startup acts entirely on the output shaft of the diesel engine through its input shaft, increasing the starting shock received by the diesel engine during initial startup, causing additional wear on the diesel engine and increasing the possibility of damage to the diesel engine.

[0023] A silent diesel generator set for low temperature environment, please refer to Figure 1-Figure 7As shown, it includes a mounting base 1, a soundproof shell 2 is mounted on the mounting base 1, a control panel is arranged on the soundproof shell 2, a diesel engine 3 and a generator 4 are fixedly connected to the mounting base 1, the diesel engine 3 is located on the left side of the generator 4, a cooling fan is arranged on the left side of the diesel engine 3 (the cooling fan is an existing mechanism, which is used to accelerate the cooling of the diesel engine 3 by the coolant), a plurality of exhaust holes evenly distributed up and down are arranged on the left side wall of the soundproof shell 2, a plurality of air inlet holes evenly distributed up and down are arranged on the right side wall of the soundproof shell 2, the cross-sectional shape of the exhaust hole on the soundproof shell 2 is wavy, which is used to reflect and reduce the size of the sound waves passing through it, a plurality of first sound insulation boards 5 evenly distributed up and down are fixedly connected to the air inlet holes of the soundproof shell 2, the number of the first sound insulation boards 5 is the same as the number of the air inlet holes of the soundproof shell 2 and corresponds one to one, and the first sound insulation boards 5 are the same as the number of the air inlet holes of the soundproof shell 2 and correspond one to one. The cross-sectional shape of a sound insulation board 5 is an arc, the concave surface of the first sound insulation board 5 faces downward, and the projection area of ​​the first sound insulation board 5 in the vertical direction is larger than the cross-sectional area of ​​the air inlet hole of the sound insulation shell 2, which is used to reduce the size of the sound waves passing through the air inlet hole of the sound insulation shell 2. At the same time, the gas flows through the air inlet hole of the sound insulation shell 2. The output shaft of the diesel engine 3 is fixedly connected with a fixed column 6, and the right side of the fixed column 6 is spline-connected with a sliding shell 7. When the fixed column 6 drives the sliding shell 7 to rotate synchronously, the sliding shell 7 can slide left and right on the fixed column 6. The sliding shell 7 is slidably connected with a limit block 8, and a spring is fixedly connected between the sliding shell 7 and the limit block 8. The input shaft of the generator 4 is fixedly connected with a connecting column 9, and the left side of the connecting column 9 is rotatably connected with a rotating disk 10. The connecting column 9 is fixedly connected with a fixed plate 11, and the fixed plate 11 is slidably connected with the rotating disk 10. The fixed plate 11 is L-shaped, and an arc rod is arranged in the rotating disk 10. The arc rod penetrates the fixed plate 11. A spring is fixedly connected between the fixed plate 11 and the rotating disk 10. The arc rod is used to limit the spring to be able to be compressed or stretched in the arc direction. The connecting column 9 is slidably connected with a sliding block 12 through a connecting frame. The sliding block 12 is pressed and matched with the rotating disk 10. The left side of the sliding block 12 presses the rotating disk 10 and slides with it. A spring is fixedly connected between the sliding block 12 and the connecting column 9. The elastic coefficient of the spring is greater than the elastic coefficient of the spring connected to the limit block 8, and the elastic coefficient of the spring is less than the elastic coefficient of the spring connected to the fixed plate 11. The spring is initially in a compressed state. A through hole is arranged on the rotating disk 10. The rotating disk 10 is limited and matched with the limit block 8. The sliding block 12 The left side of the rotatable disk 10 is provided with an inclined surface, which is inclined to the left from front to back. The working rotation direction of the output shaft of the diesel engine 3 and the input shaft of the generator 4 is clockwise (viewed from right to left). The inclined surface of the sliding block 12 is squeezed and matched with the through hole of the rotating disk 10, and the sliding block 12 is used to reset synchronously when the rotating disk 10 is reset. A transmission block 13 is slidably connected in the through hole of the rotating disk 10, and the transmission block 13 is squeezed and matched with the sliding block 12. The transmission block 13 is squeezed and matched with the limit block 8. The diesel engine 3 is provided with a transmission control mechanism for driving the input shaft of the generator 4 to rotate. The diesel engine 3 and the transmission control mechanism are both electrically connected to the control panel. By moving the position of the sliding shell 7, the limit block 8 and the rotating disk 10 cooperate with each other, so that the diesel engine 3 does not drive the input shaft of the generator 4 to rotate during the initial preheating.The load of the diesel engine 3 when starting is reduced, and the preheating speed of the diesel engine 3 is ensured. At the same time, the spring action between the fixed plate 11 and the rotating disk 10 gradually increases the rotation speed of the input shaft of the generator 4, which greatly reduces the impact force when the sliding shell 7 and the connecting column 9 are connected and transmitted. The sound insulation shell 2 and the first sound insulation board 5 enable the device to work stably and silently.

[0024] Please refer to Figure 4 and Figure 5 As shown, the transmission control mechanism includes an electric push rod 201, which is fixedly connected to the diesel engine 3 near its output shaft, and a connecting plate 202 is fixedly connected to the telescopic end of the electric push rod 201. The electric push rod 201 is located at the rear side of the connecting plate 202, and the connecting plate 202 is connected to the sliding shell 7 for limited rotation. The connecting plate 202 moves left and right synchronously with the sliding shell 7, and the connecting plate 202 does not rotate. A temperature detection device is provided at the circulation point of the engine oil and coolant in the diesel engine 3 to detect whether the preheating of the diesel engine 3 is completed. The exhaust pipe and the intake pipe of the diesel engine 3 both penetrate the sound insulation shell 2. A speed detection component for detecting the rotation speed of the input shaft of the generator 4 is provided on the connecting column 9, and a connecting component for moving the position of the sliding shell 7 is provided on the connecting plate 202. The electric push rod 201 is electrically connected to the control panel. By detecting the temperature in the diesel engine 3, it is determined whether the preheating of the diesel engine 3 is completed. When the preheating of the diesel engine 3 is completed, the sliding shell 7 is controlled to move and connect with the connecting column 9 for transmission, so that the input shaft of the generator 4 starts to rotate.

[0025] Please refer to Figure 4 and Figure 7 As shown, the speed detection component includes a fixed shell 301, the fixed shell 301 is fixedly connected to the right side of the connecting column 9, and four centrifugal blocks 302 uniformly distributed in the circumferential direction are slidably connected in the fixed shell 301. A spring is fixedly connected between the centrifugal block 302 and the fixed shell 301, and the spring is used to move the centrifugal block 302 in a proportional distance according to the rotation speed of the fixed shell 301. A guide cavity 303 is provided in the connecting column 9, and the guide cavity 303 is connected to the fixed shell 301 through four guide holes distributed in the circumferential direction. A connecting ring 304 is rotatably connected to the column 9, and the connecting ring 304 is located on the left side of the fixed shell 301. An annular cavity is arranged in the connecting ring 304. The guide cavity 303 is connected with the annular cavity of the connecting ring 304 through two symmetrically distributed guide holes. The guide cavity 303 and the annular cavity of the connecting ring 304 are both filled with hydraulic oil. The rotation speed of the connecting column 9 is detected by the centrifugal block 302 in the fixed shell 301 to determine whether the rotation speed of the input shaft of the generator 4 rises to the same as the rotation speed of the output shaft of the diesel engine 3.

[0026] Please refer to Figure 4 , Figure 5 and Figure 7-Figure 9As shown, the connection assembly includes a connection cylinder 401, which is fixed to the connection plate 202, and the connection cylinder 401 is located at the front side of the connection plate 202. A piston rod 402 is slidably connected in the connection cylinder 401. The left side of the connection cylinder 401 is connected to a first guide tube 403, and the first guide tube 403 is connected to the annular cavity of the connection ring 304. The right side of the connection cylinder 401 is slidably connected to a limit pin 404. A blind hole is provided on the piston rod 402, and the blind hole of the piston rod 402 and the limit pin 404 are connected. The limit fit, a spring is fixedly connected between the connecting cylinder 401 and the limit pin 404, a sliding ring 405 is splined on the sliding shell 7, and the sliding ring 405 can slide left and right while rotating synchronously with the sliding shell 7. The piston rod 402 slides with the sliding ring 405 through the mounting block, which is used to make the sliding ring 405 move left and right synchronously during the rotation process by moving the piston rod 402. Two front and rear mirror-image extrusion plates 406 are fixedly connected to the sliding ring 405, and a The inclined plane, the inclined plane spacing of the two extrusion plates 406 gradually decreases from left to right, the sliding shell 7 is slidably connected with two connecting rods 407 of front and rear mirror images, the two connecting rods 407 are located on the right side of the two extrusion plates 406, and a tension spring is fixedly connected between the connecting rod 407 and the sliding shell 7, which is initially in a stretched state, and the connecting rod 407 is provided with a rectangular hole, and the rectangular hole of the connecting rod 407 is extruded and matched with the corresponding extrusion plate 406, and the left end of the connecting column 9 is provided with four grooves evenly distributed in the circumferential direction, and the connecting rod 407 is limited and matched with the adjacent grooves on the connecting column 9, and the left side of the connecting cylinder 401 and the piston rod 402 and the first guide tube 403 are all filled with hydraulic oil, and the piston rod 402 is limited by the limit pin 404. When the rotation speed of the input shaft of the generator 4 is the same as the rotation speed of the output shaft of the diesel engine 3, the connecting rod 407 is controlled to cooperate with the adjacent grooves on the connecting column 9, so that the output shaft of the diesel engine 3 directly drives the input shaft of the generator 4 to rotate, and ensures the stable transmission of power between the diesel engine 3 and the generator 4.

[0027] When the device is generating electricity in a low temperature environment, the operator first checks the cooling system, engine oil, battery and fuel system in the device. After the operator completes the inspection of the device, the operator starts the diesel engine 3 through the control panel, and the output shaft of the diesel engine 3 rotates at a low speed and is preheated. At this time, the output shaft of the diesel engine 3 is disconnected from the input shaft of the generator 4, and the input shaft of the generator 4 does not rotate. The exhaust gas generated by the diesel engine 3 is discharged from the sound insulation shell 2 through the exhaust pipe, and the outside gas enters the intake pipe of the diesel engine 3. When the temperature detection device in the diesel engine 3 detects that the temperature of the engine oil and the coolant reaches the set value, the control panel starts the electric push rod 201, and the telescopic end of the electric push rod 201 drives the sliding shell 7 and the parts connected thereto to move to the right through the connecting plate 202. When the telescopic end of the electric push rod 201 extends to the set length, the control panel turns off the electric push rod 201.

[0028] During the rotation of the output shaft of the diesel engine 3, the output shaft of the diesel engine 3 drives the fixed column 6 to rotate synchronously clockwise (from right to left), the fixed column 6 drives the sliding shell 7 and the parts thereon to rotate synchronously through the spline, the connecting plate 202 does not rotate, and the sliding shell 7 and the connecting plate 202 rotate relative to each other. As the diesel engine 3 works, the temperature in the sound insulation shell 2 rises. When the temperature in the sound insulation shell 2 reaches the set value, the control panel starts the cooling fan of the diesel engine 3, and the heat generated by the diesel engine 3 and the generator 4 is discharged through the exhaust hole on the left side of the sound insulation shell 2, and the external low-temperature gas enters through the air inlet on the right side of the sound insulation shell 2, so as to achieve the purpose of reducing the working temperature of the diesel engine 3 and the generator 4. During the operation of the device, the noise generated by the diesel engine 3 is reflected when passing through the exhaust hole on the left side of the sound insulation shell 2. At the same time, the first sound insulation board 5 will reflect and disperse the sound waves entering the air inlet on the right side of the sound insulation shell 2 in advance, so that the device maintains a silent working mode.

[0029] In the process of the connecting plate 202 driving the sliding shell 7 and the parts connected thereto to move to the right, the connecting column 9 is inserted into the middle of the sliding shell 7, the limit block 8 contacts and squeezes the rotating disk 10, the limit block 8 moves into the sliding shell 7 and compresses the connected spring, as the sliding shell 7 drives the limit block 8 to rotate, when the limit block 8 is aligned with the through hole of the rotating disk 10, the limit block 8 is inserted into the through hole of the rotating disk 10 under the elastic force of the connected spring, the limit block 8 contacts and pushes the transmission block 13 to move to the right, and then the sliding shell 7 drives the rotating disk 10 to move forward through the limit block 8. The rotating disk 10 rotates clockwise (from right to left). During the rotation of the rotating disk 10, the fixed plate 11 rotates counterclockwise (from right to left) relative to the rotating disk 10. The spring between the rotating disk 10 and the fixed plate 11 is compressed. The fixed plate 11 attempts to drive the connecting column 9 to rotate clockwise (from right to left) under the elastic force of the connected spring. As the rotating disk 10 rotates, when the sliding block 12 is aligned with the through hole of the rotating disk 10, the sliding block 12 moves to the left under the elastic force of the connected spring, and the sliding block 12 is inserted into the through hole of the rotating disk 10.

[0030] During the process of the sliding block 12 being inserted into the through hole of the rotating disk 10, the sliding block 12 contacts and pushes the transmission block 13 to move to the left, and the transmission block 13 pushes the limit block 8 out of the through hole of the rotating disk 10. The limit block 8 moves into the sliding shell 7 and compresses the connected spring. When the limit block 8 is moved out of the through hole of the rotating disk 10, the rotating disk 10 rotates counterclockwise (from right to left) under the elastic force of the connected spring to reset, and the spring between the rotating disk 10 and the fixed plate 11 stretches. At the same time, the through hole of the rotating disk 10 squeezes the inclined surface of the sliding block 12, and the sliding block 12 moves to the right to restore the initial position. The sliding block 12 compresses the connected spring, and the sliding shell 7 continues to drive the limit block 8 to rotate.

[0031] In the process that the sliding shell 7 continues to drive the limit block 8 to rotate, when the limit block 8 is aligned with the through hole of the rotating disk 10 again, the above-mentioned operation of rotating the connecting column 9 is repeated, and the sliding shell 7 intermittently drives the rotating disk 10 to rotate through the limit block 8, and the rotating disk 10 gradually drives the connecting column 9 to start rotating through the spring, and the connecting column 9 drives the input shaft of the generator 4 to gradually start rotating. As the rotating disk 10 continuously acts on the connecting column 9 through the elastic force of the connected spring and the fixed plate 11, the rotation speed of the connecting column 9 and the input shaft of the generator 4 continues to increase until the rotation speed of the input shaft of the generator 4 is equal to the rotation speed of the output shaft of the diesel engine 3, and the input shafts of the diesel engine 3 and the generator 4 maintain a stable rotation speed. By moving the position of the sliding shell 7, the limit block 8 and the rotating disk 10 cooperate with each other, so that the rotation speed of the input shaft of the generator 4 is gradually increased to the same as the rotation speed of the output shaft of the diesel engine 3, so that the device achieves the purpose that the output shaft of the diesel engine 3 is not connected to the input shaft of the generator 4 at the beginning, reduces the impact force received by the output shaft of the diesel engine 3 when starting, and reduces the wear risk of the diesel engine 3 and the generator 4.

[0032] During the rotation of the input shaft of the generator 4, the connecting column 9 drives the fixed shell 301 to rotate, and the connecting ring 304 rotates relative to the connecting column 9. During the rotation of the fixed shell 301, the limiting pin 404 limits the piston rod 402, and the hydraulic oil in the first guide tube 403 does not flow initially. When the rotation speed of the input shaft of the generator 4 reaches the set value, the four centrifugal blocks 302 in the fixed shell 301 move away from each other under the action of the connected centrifugal force, and the centrifugal blocks 302 compress the spring connected thereto, and the hydraulic oil on the left side of the piston rod 402 in the connecting cylinder 401 The piston rod 402 enters the fixed shell 301 through the first guide tube 403, the annular cavity of the connecting ring 304, and the guide cavity 303, and moves to the left. The blind hole of the piston rod 402 squeezes the limit pin 404, and the limit pin 404 moves forward and compresses the connected spring. The limit of the piston rod 402 is released, and the piston rod 402 drives the sliding ring 405 and the two extrusion plates 406 to move to the left synchronously through the mounting block. The connecting rod 407 loses the extrusion of the inclined surface of the adjacent extrusion plate 406, and the connecting rod 407 moves into the sliding shell 7 under the tension of the connected tension spring.

[0033] With the relative rotation of the sliding shell 7 and the connecting column 9, the connecting rod 407 is inserted into the groove on the left side of the connecting column 9, and the fixed column 6 rotates synchronously with the connecting column 9 through the sliding shell 7 and the connecting rod 407. The output shaft of the diesel engine 3 and the input shaft of the generator 4 are stably transmitted, so that the input shaft of the generator 4 rotates stably and uniformly, making the power generation power of the generator 4 more stable. In the process of gradually increasing the rotation of the input shaft of the generator 4, the generator 4 completes its own preheating operation through no-load rotation. At this time, the control panel increases the rotation speed of the output shaft of the diesel engine 3 and starts the generator 4 to generate electricity. When the device is completed, the operator turns off the diesel engine 3 through the control panel.

[0034] After the diesel engine 3 is shut down, the rotation speed of the output shaft of the diesel engine 3 gradually decreases until it stops, and the input shaft of the generator 4 stops rotating synchronously. The centrifugal block 302 in the fixed shell 301 returns to its initial position under the elastic force of the connected spring, and the related parts all perform the above-mentioned reverse movement. The piston rod 402 drives the sliding ring 405 to move to the right through the mounting block, and the extrusion plate 406 on the sliding ring 405 squeezes the corresponding connecting rod 407 on the inclined surface. The connecting rod 407 moves to reset and stretches the connected tension spring. When the limit pin 404 is aligned with the blind hole of the piston rod 402, the limit pin 404 moves forward under the elastic force of the connected spring and is inserted into the blind hole of the piston rod 402. The limit pin 404 re-limits the piston rod 402. Finally, the control panel starts the electric push rod 201. After the telescopic end of the electric push rod 201 drives the connected parts to return to their initial positions through the connecting plate 202, the control panel turns off the electric push rod 201. At this point, all parts have returned to their initial positions.

[0035] Example 2: When a diesel generator set is operating in a low temperature environment, the viscosity of the diesel engine oil and coolant is prone to increase, resulting in low preheating efficiency of the diesel engine when the diesel engine relies on the heat generated by its own rotation to preheat, increasing the start-up time of the diesel engine and increasing the wear of the diesel engine components.

[0036] Based on Example 1, please refer to Figure 1 , Figure 2 and Fig.10As shown, it also includes an exhaust gas guiding mechanism, which is arranged on the upper side of the sound insulation shell 2. The exhaust gas guiding mechanism is used to recycle the heat in the exhaust gas. The exhaust gas guiding mechanism includes an air guide shell 501, which is located above the diesel engine 3. The air guide shell 501 is fixedly connected to the upper side of the sound insulation shell 2. A filter device 502 is fixedly connected in the air guide shell 501 (the filter device 502 is an existing device, which is replaced by a rectangular block in the accompanying drawings) for filtering impurities in the exhaust gas discharged by the diesel engine 3. The air guide shell 501 is connected to the exhaust pipe of the diesel engine 3. The exhaust gas moves in a serpentine shape in the air guide shell 501. Through continuous bending, the sound entering the air guide shell is refracted and attenuated multiple times, thereby ensuring the mute effect of the device. The right side of the air guide shell 501 is connected to an air guide pipe 503, which is inserted into the sound insulation shell 2. The air guide pipe 503 is inserted into the sound insulation shell 2. 03 is a three-way pipe, a pipe opening on the left side of the air guide pipe 503 is connected to the air guide shell 501, and the lower right pipe opening of the air guide pipe 503 is inserted into the sound insulation shell 2. The air guide pipe 503 is fixedly connected with an air supply pipe 504, and the air supply pipe 504 is connected to the intake pipe of the diesel engine 3. The air supply pipe 504 penetrates the air guide pipe 503. The part of the air supply pipe 504 located in the air guide pipe 503 is spiral, which is used to transfer the heat in the exhaust gas to the cold air flowing in the air supply pipe 504, thereby increasing the temperature of the cold air entering the diesel engine 3 and avoiding damage to the diesel engine 3 due to excessive temperature difference. An auxiliary preheating component for controlling the connection state of the air guide pipe 503 is provided on the upper side of the sound insulation shell 2. The exhaust gas is introduced into the sound insulation shell 2 through the air guide pipe 503, so that the temperature in the sound insulation shell 2 rises rapidly, shortening the preheating time of the diesel engine 3 and the generator 4.

[0037] Please refer to Figure 1 , Figure 2 , Figure 4 , Fig.10 and Fig.11As shown, the auxiliary preheating assembly includes a connecting block 601, the connecting block 601 is fixedly connected to the upper side of the sound insulation shell 2, the connecting block 601 is fixedly connected to the air guide pipe 503, a through hole is provided on the connecting block 601, the through hole on the connecting block 601 is connected to the air guide pipe 503, a first hydraulic cylinder 602 is fixedly connected to the upper side of the sound insulation shell 2, the first hydraulic cylinder 602 is connected to the second guide pipe 603, the second guide pipe 603 is connected to the first guide pipe 403, the telescopic end of the first hydraulic cylinder 602 is fixedly connected to a sliding plate 604, the sliding plate 604 is slidably connected to the connecting block 601, the sliding plate 604 is provided with a through hole, the sliding The through hole of plate 604 is connected and matched with the through hole of connecting block 601. Initially, the through hole of sliding plate 604 is connected with air duct 503. Sliding plate 604 is fixedly connected with baffle plate 605 through connecting frame. Baffle plate 605 is provided with through hole. The through hole of baffle plate 605 is connected and matched with air duct 503. Initially, the through hole of baffle plate 605 blocks the pipe opening on the upper side of air duct 503. At this time, the exhaust gas entering air duct 503 directly enters the sound insulation shell 2. Hydraulic oil is filled in the first hydraulic cylinder 602 and the second air duct 603. By moving baffle plate 605 and sliding plate 604, the position of exhaust gas discharged from air duct 503 is controlled.

[0038] Repeat the above-mentioned start-up preheating operation of the diesel engine 3. When the diesel engine 3 is started, the exhaust pipe of the diesel engine 3 discharges the exhaust gas generated by it, and the exhaust gas of the diesel engine 3 enters the air guide housing 501. The exhaust gas passes through the guide and filtering device 502 in the air guide housing 501 and enters the air guide pipe 503. The exhaust gas flows to the right in the air guide pipe 503, and finally the exhaust gas enters the sound insulation shell 2 through the through hole of the sliding plate 604. The heat of the exhaust gas causes the temperature in the sound insulation shell 2 to rise rapidly, and the preheating speed of the diesel engine 3 and the generator 4 increases. The initial preheating time of the device is shortened, and at the same time At the same time, since the air duct 503 is located in the sound insulation shell 2 with its pipe opening facing the generator 4, the generator 4 is preheated under the action of the exhaust gas temperature to avoid freezing of the lubricating fluid at the input shaft of the generator 4, which would affect the output shaft of the diesel engine 3 driving the input shaft of the generator 4 to rotate. External cold air enters the intake pipe of the diesel engine 3 through the air delivery pipe 504. The air delivery pipe 504 transfers the heat in the exhaust gas to the cold air entering the diesel engine 3 through its spiral portion located in the air duct 503, to avoid excessive temperature difference between the cold air and the diesel engine 3, which would cause damage to the internal parts of the diesel engine 3.

[0039] When the electric push rod 201 is started, the sliding shell 7 drives the input shaft of the generator 4 to rotate through the limit block 8 and the rotating disk 10. If the input shaft of the generator 4 is difficult to rotate, the hydraulic oil in the fixed shell 301 and the guide cavity 303 does not flow, and the air guide pipe 503 keeps injecting the exhaust gas into the sound insulation shell 2. When the input shaft of the generator 4 rotates and the rotation speed is the same as the rotation speed of the output shaft of the diesel engine 3, the hydraulic oil in the guide cavity 303 and the first guide pipe 403 flows as mentioned above, and the hydraulic oil in the first hydraulic cylinder 602 flows into the first guide pipe 403 synchronously through the second guide pipe 603, the telescopic end of the first hydraulic cylinder 602 extends, and the sliding plate 604 The baffle plate 605 is driven by the connecting frame to move leftward along with the telescopic end of the first hydraulic cylinder 602, and the part of the air duct 503 located in the sound insulation shell 2 is gradually blocked, and the part on the upper side of the air duct 503 is gradually opened. The air duct 503 directly discharges the exhaust gas into the air, and stops injecting the exhaust gas into the sound insulation shell 2. The exhaust gas flow is guided by the air duct 503, and the air duct 503 is blocked in cooperation with the sliding plate 604 and the baffle plate 605, so as to achieve the purpose of injecting filtered exhaust gas into the sound insulation shell 2 only when the diesel engine 3 is preheated, thereby improving the preheating speed of the diesel engine 3 and the generator 4, and avoiding the freezing of the input shaft of the generator 4 when starting, which affects the starting preheating time of the device.

[0040] When the device is finished working and the input shaft of the generator 4 stops rotating, the hydraulic oil in the first hydraulic cylinder 602 flows in the reverse direction as mentioned above, the telescopic end of the first hydraulic cylinder 602 is retracted, the sliding plate 604 and the baffle 605 are synchronously moved and reset, and the upper side of the air guide pipe 503 is re-blocked and the lower side is opened.

[0041] Embodiment 3: The diesel generator set is started and preheated in a low-temperature environment. When the diesel engine is started, the interior of the diesel engine is in a low-temperature state, and the diesel engine will generate more mechanical noise. At the same time, the combustion state of the internal diesel is unstable when the diesel engine is initially started, which will cause the combustion noise to increase. Then, part of the noise is transmitted out of the device from the exhaust hole in the sound insulation shell 2, causing noise pollution to the surrounding environment.

[0042] Based on Example 2, please refer to Figure 2 , Figure 4 , Fig.10 and Fig.12As shown, an auxiliary sound insulation mechanism is also included, the auxiliary sound insulation mechanism is arranged on the left side of the sound insulation shell 2, the auxiliary sound insulation mechanism is used to temporarily block the sound transmission of the exhaust hole of the sound insulation shell 2, and the auxiliary sound insulation mechanism includes a second hydraulic cylinder 701, the second hydraulic cylinder 701 is fixedly connected to the left side of the sound insulation shell 2, the telescopic end of the second hydraulic cylinder 701 is fixedly connected to a connecting frame 702, the second hydraulic cylinder 701 is connected to a third guide pipe 703, the third guide pipe 703 is connected to the right side of the connecting tube 401, and a plurality of second sound insulation boards 704 evenly distributed up and down are fixedly connected in the connecting frame 702, and the number of the second sound insulation boards 704 and the exhaust hole of the sound insulation shell 2 The number of second sound insulation plates 704 is the same, the spacing between two adjacent second sound insulation plates 704 is the same as the spacing between two adjacent exhaust holes on the sound insulation shell 2, the second sound insulation plates 704 and the first sound insulation plates 5 are exactly the same in shape and function, and are used to reflect the sound waves that will enter the exhaust holes of the sound insulation shell 2, and hydraulic oil is filled between the right side of the connecting cylinder 401 and the piston rod 402, the second hydraulic cylinder 701 and the third guide pipe 703. By moving the positions of the connecting frame 702 and the second sound insulation plates 704, when the internal noise of the device increases during initial startup, the sound insulation effect at the exhaust holes of the sound insulation shell 2 is enhanced to ensure the stability of the silent state of the device.

[0043] When the diesel engine 3 is started, the plurality of second sound insulation plates 704 on the connection frame 702 all correspond to the adjacent exhaust holes, and the second sound insulation plates 704 reflect the noise generated in the sound insulation shell 2 to reduce the size of the sound waves entering the exhaust holes of the sound insulation shell 2. When the diesel engine 3 is preheated and drives the input shaft of the generator 4 to rotate, when the rotation speed of the input shaft of the generator 4 reaches the set value, the hydraulic oil in the guide cavity 303 and the first guide pipe 403 flows, the piston rod 402 in the connecting cylinder 401 moves to the left, and the hydraulic oil in the second hydraulic cylinder 701 flows into the connecting cylinder 4 through the third guide pipe 703. 01, on the right side of the inner piston rod 402, the telescopic end of the second hydraulic cylinder 701 contracts, and the telescopic end of the second hydraulic cylinder 701 drives the connecting frame 702 to move upward, and the second sound insulation plate 704 is misaligned with the corresponding exhaust hole on the sound insulation shell 2, so that the cooling fan of the diesel engine 3 can inject the heat in the sound insulation shell 2 into the exhaust hole, thereby ensuring the stability of heat discharge in the device. Through the movement of the connecting frame 702 and a plurality of second sound insulation plates 704, the sound insulation effect of the exhaust hole on the sound insulation shell 2 is temporarily enhanced, which effectively ensures the sound insulation effect of the device when the diesel engine 3 is noisy at the time of startup, and ensures the silent operation of the device.

[0044] When the device completes power generation and the input shaft of the generator 4 stops rotating, the hydraulic oil in the third guide pipe 703 performs the above-mentioned reverse flow, and the telescopic end of the second hydraulic cylinder 701 extends and drives the connecting frame 702 and the plurality of second sound insulation plates 704 to return to their initial positions.

[0045] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A silent diesel generator set for use in a low temperature environment, comprising a mounting base (1), a soundproof shell (2) mounted on the mounting base (1), a diesel engine (3) and a generator (4) fixedly connected to the mounting base (1), and the soundproof shell (2) being provided with evenly distributed exhaust holes and evenly distributed air inlet holes, wherein: The invention also comprises uniformly distributed first sound insulation plates (5), which are all fixedly connected to the air inlet of the sound insulation shell (2); the output shaft of the diesel engine (3) is fixedly connected to a fixed column (6), the fixed column (6) is spline-connected to a sliding shell (7), a limited block (8) is slidably connected inside the sliding shell (7); the input shaft of the generator (4) is fixedly connected to a connecting column (9), the connecting column (9) is rotatably connected to a rotating disk (10), the connecting column (9) is fixedly connected to a fixing plate (11) slidably connected to the rotating disk (10), the fixing column (11) is fixedly connected to the fixing plate (11) slidably connected to the rotating disk (10), and the fixing column (11) is fixedly connected to the fixing plate (11) slidably connected to the rotating disk (10). A spring is fixedly connected between the plate (11) and the rotating disk (10); the connecting column (9) is slidably connected to a sliding block (12) pressed and matched with the rotating disk (10) through a connecting frame; a through hole is provided on the rotating disk (10) and is limitedly matched with the limit block (8); a transmission block (13) pressed and matched with the sliding block (12) is slidably connected in the through hole of the rotating disk (10); the transmission block (13) is pressed and matched with the limit block (8); and a transmission control mechanism for driving the input shaft of the generator (4) to rotate is provided on the diesel engine (3).

2. A silent diesel generator set for low temperature environment according to claim 1, characterized in that: The cross-sectional shape of the exhaust hole on the sound insulation shell (2) is wavy, and is used to reflect and reduce the size of the sound waves passing through it.

3. The silent diesel generator set for low temperature environment according to claim 1 is characterized in that: The cross-sectional shape of the first sound insulation board (5) is arc-shaped, the concave surface of the first sound insulation board (5) faces downward, and the projection area of ​​the first sound insulation board (5) in the vertical direction is larger than the cross-sectional area of ​​the air inlet hole of the sound insulation shell (2), so as to reduce the size of the sound waves passing through the air inlet hole of the sound insulation shell (2).

4. The silent diesel generator set for low temperature environment according to claim 1 is characterized in that: A sloped surface is provided on one side of the sliding block (12) close to the rotating disk (10), and the sloped surface of the sliding block (12) is extruded and matched with a through hole of the rotating disk (10) so as to synchronously reset the sliding block (12) when the rotating disk (10) is reset.

5. A silent diesel generator set for low temperature environment according to claim 4, characterized in that: The transmission control mechanism comprises an electric push rod (201), the electric push rod (201) being fixedly connected to the diesel engine (3) near its output shaft, the telescopic end of the electric push rod (201) being fixedly connected to a connecting plate (202) which is connected to the sliding shell (7) for limited rotation, a temperature detection device being provided at a circulation point of engine oil and coolant in the diesel engine (3), an exhaust pipe and an intake pipe of the diesel engine (3) both penetrating the sound insulation shell (2), a spring being fixedly connected between the sliding shell (7) and the limiting block (8), a spring being fixedly connected between the sliding block (12) and the connecting column (9), a speed detection component for detecting the rotation speed of the input shaft of the generator (4) being provided on the connecting column (9), and a connecting component for moving the position of the sliding shell (7) being provided on the connecting plate (202).

6. A silent diesel generator set for low temperature environment according to claim 5, characterized in that: The speed detection assembly comprises a fixed shell (301), the fixed shell (301) being fixedly connected to a side of the connecting column (9) close to the generator (4), a centrifugal block (302) uniformly distributed in the circumferential direction being slidably connected in the fixed shell (301), a spring being fixedly connected between the centrifugal block (302) and the fixed shell (301), a flow guide cavity (303) being arranged in the connecting column (9), the flow guide cavity (303) being communicated with the fixed shell (301) through flow guide holes distributed in the circumferential direction, a connecting ring (304) being rotatably connected to the connecting column (9), an annular cavity being arranged in the connecting ring (304), the flow guide cavity (303) being communicated with an annular cavity of the connecting ring (304) through symmetrically distributed flow guide holes, and hydraulic oil being filled in the flow guide cavity (303) and the annular cavity of the connecting ring (304).

7. A silent diesel generator set for low temperature environment according to claim 6, characterized in that: The connection assembly comprises a connection cylinder (401), the connection cylinder (401) being fixedly connected to the connection plate (202), a piston rod (402) being slidably connected inside the connection cylinder (401), a first flow guide tube (403) being connected to an annular cavity of the connection ring (304) being connected to a side of the connection cylinder (401) close to the diesel engine (3), a limit pin (404) being slidably connected to a side of the connection cylinder (401) away from the diesel engine (3), a blind hole being provided on the piston rod (402) for limiting the position of the limit pin (404), a spring being fixedly connected between the connection cylinder (401) and the limit pin (404), a sliding ring (405) being spline-connected on the sliding shell (7), the piston rod (402) being connected to the sliding ring (405) via a mounting block ) limited sliding, a mirror image extrusion plate (406) is fixedly connected to the sliding ring (405), and a slope is provided on the side of the extrusion plate (406) away from the sliding ring (405), and the sliding shell (7) is slidably connected to a mirror image connecting rod (407), and a tension spring is fixedly connected between the connecting rod (407) and the sliding shell (7), and the connecting rod (407) is provided with a rectangular hole that is extruded and matched with the corresponding extrusion plate (406), and the end of the connecting column (9) close to the diesel engine (3) is provided with grooves evenly distributed in the circumferential direction, and the connecting rod (407) is limitedly matched with the adjacent grooves on the connecting column (9), and hydraulic oil is filled between the side of the connecting cylinder (401) close to the diesel engine (3) and the piston rod (402) and the first guide pipe (403).

8. The silent diesel generator set for low temperature environment according to claim 7 is characterized in that: The exhaust gas guide mechanism is also included, the exhaust gas guide mechanism is arranged on the upper side of the sound insulation shell (2), the exhaust gas guide mechanism is used to recycle the heat in the exhaust gas, the exhaust gas guide mechanism includes an air guide shell (501), the air guide shell (501) is fixedly connected to the upper side of the sound insulation shell (2), a filter device (502) is fixedly connected inside the air guide shell (501), the air guide shell (501) is connected to the exhaust pipe of the diesel engine (3), and one side of the air guide shell (501) is connected to the exhaust pipe of the diesel engine (3). An air guide pipe (503) is provided, the air guide pipe (503) being inserted into the sound insulation shell (2), the air guide pipe (503) being fixedly connected to an air supply pipe (504) connected to an air intake pipe of the diesel engine (3), the air supply pipe (504) penetrating the air guide pipe (503), the portion of the air supply pipe (504) located inside the air guide pipe (503) being spiral-shaped, and an auxiliary preheating component for controlling the connection state of the air guide pipe (503) being provided on the upper side surface inside the sound insulation shell (2).

9. A silent diesel generator set for low temperature environment according to claim 8, characterized in that: The auxiliary preheating assembly comprises a connecting block (601), the connecting block (601) being fixedly connected to the upper side surface inside the sound insulation shell (2), the connecting block (601) being fixedly connected to the air guide pipe (503), the connecting block (601) being provided with a through hole communicating with the air guide pipe (503), the upper side surface inside the sound insulation shell (2) being fixedly connected to a first hydraulic cylinder (602), the first hydraulic cylinder (602) being connected to a second air guide pipe (603) communicating with the first air guide pipe (403) The telescopic end of the first hydraulic cylinder (602) is fixedly connected to a sliding plate (604) which is slidably connected to the connecting block (601); the sliding plate (604) is provided with a through hole which communicates with and cooperates with the through hole of the connecting block (601); the sliding plate (604) is fixedly connected to a baffle (605) via a connecting frame; the baffle (605) is provided with a through hole which communicates with and cooperates with the air guide pipe (503); the first hydraulic cylinder (602) and the second air guide pipe (603) are both filled with hydraulic oil.

10. A silent diesel generator set for low temperature environment according to claim 9, characterized in that: The soundproofing shell (2) further comprises an auxiliary soundproofing mechanism (70), the auxiliary soundproofing mechanism (70) being arranged on a side of the soundproofing shell (2) close to the diesel engine (3), the auxiliary soundproofing mechanism (70) being used to temporarily block the transmission of sound from the exhaust hole of the soundproofing shell (2), the auxiliary soundproofing mechanism (70) comprising a second hydraulic cylinder (701), the second hydraulic cylinder (701) being fixedly connected to a side of the soundproofing shell (2) close to the diesel engine (3), the telescopic end of the second hydraulic cylinder (701) being fixedly connected to a connecting frame (702), the second hydraulic cylinder (701) being fixedly connected to a connecting frame (702), the second hydraulic cylinder (701) being fixedly connected to a connecting frame (702), the second hydraulic cylinder (701) being fixedly connected to a connecting frame (702) at the telescopic end of the second hydraulic cylinder (701 ... The second hydraulic cylinder (701) is connected to a third flow guide pipe (703) connected to the side of the connecting tube (401) away from the diesel engine (3); evenly distributed second sound insulation plates (704) are fixedly connected in the connecting frame (702); the second sound insulation plates (704) and the first sound insulation plates (5) have the same shape and function; hydraulic oil is filled between the side of the connecting tube (401) away from the diesel engine (3) and the piston rod (402), the second hydraulic cylinder (701) and the third flow guide pipe (703).

Images