Double-paddle transmission device

Abstract

The utility model relates to a double-paddle transmission device which is characterized in that on the basis of an existing ship propulsion system, an intermediate transmission device is connected between a port transmission device and a starboard transmission device, and the intermediate transmission device comprises a first clutch used for controlling connection and disconnection of the port transmission device and the starboard transmission device; when the first clutch is engaged, any one of the larboard main engine, the larboard transmission device, the intermediate transmission device, the starboard transmission device, the starboard shaft system and the starboard propeller is in transmission connection in sequence, and any one of the starboard main engine, the starboard transmission device, the intermediate transmission device, the larboard transmission device, the larboard shaft system and the starboard propeller is in transmission connection in sequence; compared with the problems of high oil consumption and poor emission due to low-load operation of double hosts or four hosts under a long-time low-speed working condition of a ship in the prior art, when the ship is under the low-speed working condition, a one-engine two-propeller mode can be started, and only one host operates, so that the oil consumption and the emission are greatly reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to ship power transmission technical field, concretely relates to a double propeller transmission device. BACKGROUND

[0002] Part of the working ship usually has the high-speed navigation working condition of the law enforcement demand such as pursuit, drive and so on, therefore, the installed power is relatively required to be larger, and it is generally two machines two propellers or four machines two propeller power forms. Figure 1 And Figure 2 As shown in the figure, the existing two machines two propellers and four machines two propellers ship propulsion system all include left side main engine 01, left side coupling 02, left side transmission device 03, left side shafting 04 and left side propeller 05, right side main engine 06, right side coupling 07, right side transmission device 08, right side shafting 09 and right side propeller 010, and the difference lies in that the number of left side main engine 01, left side coupling 02, right side main engine 06 and right side coupling 07 of two machines two propellers ship propulsion system is one, and the number of left side main engine 01, left side coupling 02, right side main engine 06 and right side coupling 07 of four machines two propellers ship propulsion system is two. The left and right side propulsion systems of two machines two propellers ship propulsion system and four machines two propellers ship propulsion system are independent of each other.

[0003] In addition to the high-speed navigation working condition, the ship of this type has more time to work at low speed working condition such as cruising, at this time, double main engine or four main engine low load operation, high fuel consumption, poor emission, engine part maintenance replacement cycle is shorter. The existing two machines two propellers, four machines two propellers ship propulsion system cannot meet the requirements of modern ship economy, maneuverability, safety, environmental protection. UTILITY MODEL CONTENTS

[0004] The utility model aims at: in view of the problems of double main engine or four main engine low load operation, high fuel consumption and poor emission of ship in prior art under low speed working condition for a long time, provide a double propeller transmission device.

[0005] In order to realize the above-mentioned purpose, the utility model adopts the technical scheme that:

[0006] The double-paddle transmission device comprises a port transmission device, a port shafting, a port propeller, a starboard transmission device, a starboard shafting, a starboard propeller, at least one port main engine and at least one starboard main engine, any port main engine, the port transmission device, the port shafting and the port propeller are sequentially transmissionally connected; any starboard main engine, the starboard transmission device, the starboard shafting and the starboard propeller are sequentially transmissionally connected, a middle transmission device is connected between the port transmission device and the starboard transmission device, the middle transmission device comprises a first clutch for controlling connection and disconnection of the port transmission device and the starboard transmission device; when the first clutch is engaged, any port main engine, the port transmission device, the middle transmission device, the starboard transmission device, the starboard shafting and the starboard propeller are sequentially transmissionally connected, and any starboard main engine, the starboard transmission device, the middle transmission device, the port transmission device, the port shafting and the port propeller are sequentially transmissionally connected.

[0007] The utility model discloses adopt the preceding technical scheme, through setting up intermediate transmission device, when the ship is in low speed working condition, can open one machine two propeller mode, that is, control first clutch engagement, simultaneously, only open arbitrary one main engine, no matter is the port main engine or starboard main engine, this main engine can drive port propeller and starboard propeller rotation simultaneously, compared with the problem of double main engine or four main engine low load operation, high oil consumption and poor emission in prior art when the ship is in low speed working condition for a long time, the utility model discloses can open one machine two propeller mode when the ship is in low speed working condition, only one main engine runs, greatly reduces oil consumption and emission.

[0008] Further, the intermediate transmission device further comprises an input shaft, a first gear shaft, an intermediate gear shaft and an input gear shaft, the input shaft and the first gear shaft are transmissionally connected through the first clutch, the first gear shaft, the intermediate gear shaft and the input gear shaft are sequentially transmissionally connected through gear on shafts, the gear on the first gear shaft and the input gear shaft has the same number of teeth, the input shaft and the input gear shaft are respectively transmissionally connected with the port transmission device and the starboard transmission device, or the input shaft and the input gear shaft are respectively transmissionally connected with the starboard transmission device and the port transmission device.

[0009] Further, the first clutch is a friction clutch, which has small impact vibration and noise during engagement.

[0010] Further, the intermediate transmission device further comprises a box body, the first gear shaft and the intermediate gear shaft are arranged in the box body, and the input shaft and the input gear shaft only have end portions extending out of the box body, and the first clutch is hung on the outer wall of the box body, which can reduce the size and weight of the gear box and facilitate the assembly, disassembly and maintenance of the clutch.

[0011] Furthermore, it includes one of the port-side main engines and one of the starboard-side main engines.

[0012] Furthermore, both the port-side transmission device and the starboard-side transmission device include a second clutch; the second clutch in the port-side transmission device is used to control the connection and disconnection between the port-side main engine and the port-side shafting; the second clutch in the starboard-side transmission device is used to control the connection and disconnection between the starboard-side main engine and the starboard-side shafting.

[0013] Furthermore, both the port and starboard transmission devices include a clutch gear shaft, a second gear shaft, a first output gear shaft, and a first PTO output gear shaft; the clutch gear shaft and the first PTO output gear shaft are connected by on-shaft gear transmission; the clutch gear shaft and the second gear shaft are connected by a second clutch transmission; the second gear shaft and the first output gear shaft are connected by on-shaft gear transmission; the clutch gear shafts of the port and starboard transmission devices are respectively connected to the port main engine and the starboard main engine; the first output gear shafts of the port and starboard transmission devices are respectively connected to the port shafting system and the starboard shafting system; and the first PTO output gear shafts of both the port and starboard transmission devices are connected to the intermediate transmission device.

[0014] Furthermore, it includes two port-side main engines, located on the fore and aft sides of the port-side transmission device, respectively; it also includes two starboard-side main engines, located on the fore and aft sides of the starboard-side transmission device, respectively.

[0015] Furthermore, both the port-side transmission device and the starboard-side transmission device include a third clutch and a fourth clutch; the third clutch and the fourth clutch in the port-side transmission device are respectively used to control the connection and disconnection between the two port-side main engines and the port-side shafting; the third clutch and the fourth clutch in the starboard-side transmission device are respectively used to control the connection and disconnection between the two starboard-side main engines and the starboard-side shafting.

[0016] Further, the left side transmission and the right side transmission each further comprise a front clutch input shaft, a front gear shaft, a second output gear shaft, a rear clutch input shaft, a rear gear shaft, and a second PTO output gear shaft; the front clutch input shaft is in driving connection with the front gear shaft through a third clutch; the rear clutch input shaft is in driving connection with the rear gear shaft through a fourth clutch; the front gear shaft is provided with a front gear and a second output pinion, and the front gear, the rear gear shaft, and the second PTO output gear shaft are in driving connection in sequence; the second output pinion of the right side transmission is in direct meshing driving connection with the second output gear shaft; the left side transmission further comprises an idler shaft, and the second output pinion, the idler shaft, and the second output gear shaft are in driving connection in sequence; the front clutch input shaft and the rear clutch input shaft of the left side transmission are in driving connection with two left side main engines respectively; the front clutch input shaft and the rear clutch input shaft of the right side transmission are in driving connection with two right side main engines respectively; the second output gear shaft of the left side transmission and the right side transmission is in driving connection with a left side shafting and a right side shafting respectively; the second PTO output gear shaft of the left side transmission and the right side transmission is in driving connection with an intermediate transmission; the two left side main engines can be combined, and the two right side main engines can be combined.

[0017] Compared with the prior art, the utility model discloses the beneficial effects are: when the ship is in low -speed working condition, can open one machine two oars mode, only one host computer runs, and the oil consumption and discharge are reduced greatly;According to the ship speed demand, the host computer can be independently propelled, and also can be double -engine or multi -engine combined propulsion, and effectively improve the maneuverability of the ship power system;Multiple host computers can be independently operated and also can be combined operation, and when a host computer fails, the remaining host computer can be used to propel, effectively improving the redundancy and safety of the power system. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is two machine two oars ship propulsion system diagram in the prior art;

[0019] Figure 2 It is four machine two oars ship propulsion system diagram in the prior art;

[0020] Figure 3 It is two machine two oars ship propulsion system diagram in the utility model;

[0021] Figure 4 It is four machine two oars ship propulsion system diagram in the utility model;

[0022] Figure 5 It is intermediate transmission driving principle drawing;

[0023] Figure 6 It is two machine two oars left side transmission driving principle drawing;

[0024] Figure 7 Transmission schematic for two-engine two-propeller starboard transmission;

[0025] Figure 8 Transmission schematic for four-engine two-propeller port transmission;

[0026] Figure 9 Transmission schematic for four-engine two-propeller starboard transmission.

[0027] Designations in the figures: 01 - portside main engine, 02 - portside coupling, 03 - portside transmission, 04 - portside shafting, 05 - portside propeller, 06 - starboard main engine, 07 - starboard coupling, 08 - starboard transmission, 09 - starboard shafting, 010 - starboard propeller, 1 - portside main engine, 2 - portside coupling, 3 - portside transmission, 4 - portside shafting, 5 - portside propeller, 6 - starboard main engine, 7 - starboard coupling, 8 - starboard transmission, 9 - starboard shafting, 10 - starboard propeller, 11 - intermediate transmission, 12 - housing, 13 - first gear shaft, 14 - first clutch, 15 - input shaft front bearing, 16 - first gear shaft front bearing, 17 - left pinion, 18 - first gear shaft rear bearing, 19 - input shaft rear bearing, 20 - input shaft, 21 - first input flange, 22 - intermediate gear, 23 - intermediate gear shaft rear bearing, 24 - intermediate gear shaft, 25 - second input flange, 26 - input gear shaft, 27 - input gear shaft rear bearing, 28 - right pinion, 29 - input gear shaft front bearing, 30 - intermediate gear shaft front bearing, 31 - first output shaft front bearing, 32 - first output bull gear, 33 - second output shaft rear bearing, 34 - first ahead thrust bearing, 35 - first astern thrust bearing, 36 - first output flange, 37 - first output gear shaft, 38 - second gear shaft, 39 - second gear shaft rear bearing, 40 - first output pinion, 41 - second gear shaft front bearing, 42 - second clutch rear bearing, 43 - second clutch, 44 - PTO shaft rear bearing, 45 - first PTO output gear, 46 - PTO shaft front bearing, 47 - first PTO output gear shaft, 48 - PTO output flange, 49 - clutch gear, 50 - second clutch front bearing, 51 - third input flange, 52 - clutch gear shaft, 53 - second output shaft front bearing, 54 - second output bull gear, 55 - second output shaft rear bearing, 56 - second ahead thrust bearing, 57 - second astern thrust bearing, 58 - second output flange, 59 - second output gear shaft, 60 - idler, 61 - idler rear bearing, 62 - second output pinion, 63 - front gear shaft, 64 - front gear shaft rear bearing, 65 - rear input flange, 66 - rear clutch input shaft, 67 - rear clutch rear bearing, 68 - fourth clutch, 69 - rear clutch front bearing, 70 - rear gear shaft rear bearing, 71 - rear gear, 72 - PTO output shaft rear bearing, 73 - second PTO output gear, 74 - PTO output shaft front bearing, 75 - rear gear shaft front bearing, 76 - second PTO output gear shaft, 77 - second PTO output flange, 78 - rear gear shaft, 79 - front gear shaft front bearing, 80 - front clutch rear bearing, 81 - third clutch, 82 - front clutch front bearing, 83 - front clutch input shaft, 84 - front input flange, 85 - front gear, 86 - idler shaft, 87 - idler shaft front bearing. DETAILED DESCRIPTION

[0028] The utility model will be described in detail below with reference to the drawings.

[0029] In order to make the utility model's purpose, technical scheme and advantage more clearly, the following combines with the drawings and example, and this utility model is further described in detail.It should be understood that the specific example described here is only used to explain the utility model, and is not used to limit the utility model.

[0030] The embodiment provides a double propeller transmission device, including port transmission device 3, port shafting 4, port propeller 5, starboard transmission device 8, starboard shafting 9, starboard propeller 10, at least one port main engine 1 and at least one starboard main engine 6, any port main engine 1, port transmission device 3, port shafting 4 and port propeller 5 are sequentially transmission connection;Any starboard main engine 6, starboard transmission device 8, starboard shafting 9 and starboard propeller 10 are sequentially transmission connection, and the intermediate transmission device 11 is connected between the port transmission device 3 and the starboard transmission device 8, and the intermediate transmission device 11 includes the first clutch 14 for controlling the connection and disconnection of the port transmission device 3 and the starboard transmission device 8;When the first clutch 14 is engaged, any port main engine 1, port transmission device 3, intermediate transmission device 11, starboard transmission device 8, starboard shafting 9 and starboard propeller 10 are sequentially transmission connection, and any starboard main engine 6, starboard transmission device 8, intermediate transmission device 11, port transmission device 3, port shafting 4 and port propeller 5 are sequentially transmission connection.

[0031] As shown in Figure 5 The intermediate transmission device 11 further includes an input shaft 20, a first gear shaft 13, an intermediate gear shaft 24 and an input gear shaft 26, the input shaft 20 and the first gear shaft 13 are transmission connection through the first clutch 14, the first gear shaft 13, the intermediate gear shaft 24 and the input gear shaft 26 are sequentially transmission connection through the gear on the shaft;The gear on the first gear shaft 13 and the input gear shaft 26 is the same in number;In the embodiment, the input shaft 20 and the input gear shaft 26 are transmission connection with the port transmission device 3 and the starboard transmission device 8 respectively;In addition, the input shaft 20 and the input gear shaft 26 can also be transmission connection with the starboard transmission device 8 and the port transmission device 3 respectively;The first clutch 14 is a friction clutch.

[0032] When the ship adopts one engine and two propeller mode, the working time of the main engine in the low efficiency working interval can be reduced, and the emission can be effectively reduced. Assuming that only the port engine 1 works at this time, the power of the port engine 1 is transmitted to the port shafting 4 and the port propeller 5 through the port transmission device 3. The power from the port is transmitted to the first input flange 21, the input shaft 20, the power is transmitted to the first clutch 14, when the first clutch 14 is connected, the power is transmitted to the left pinion 17, through the gear pair meshing, the power is transmitted to the intermediate gear 22, the right pinion 28 in turn, and then output to the starboard transmission device 8 through the second input flange 25 by the input gear shaft 26, and finally transmitted to the starboard shafting 9 and the starboard propeller 10, realizing one engine driving two propellers. Similarly, when only the starboard engine 6 works, the power can also be transmitted to the port and starboard propellers respectively. The left pinion 17 and the right pinion 28 keep the same number of teeth, so that the first input flange 21 and the second input flange 25 keep the same speed. The intermediate transmission device 11 also includes a box body 12, the first gear shaft 13 and the intermediate gear shaft 24 are arranged in the box body 12, the input shaft 20 and the input gear shaft 26 only the end part extends out of the box body 12, the first clutch 14 is hung on the outer wall of the box body 12, which can reduce the size and weight of the box body 12, and is beneficial to the installation and maintenance of the first clutch 14.

[0033] As shown in Figure 3 、 Figure 6 and Figure 7 When the transmission device includes a port engine 1 and a starboard engine 6, the port transmission device 3 and the starboard transmission device 8 each include a second clutch 43; the second clutch 43 in the port transmission device 3 is used to control the connection and disconnection between the port engine 1 and the port shafting 4; the second clutch 43 in the starboard transmission device 8 is used to control the connection and disconnection between the starboard engine 6 and the starboard shafting 9;

[0034] The left side transmission device 3 and the right side transmission device 8 also each comprise a clutch gear shaft 52, a second gear shaft 38, a first output gear shaft 37 and a first PTO output gear shaft 47; the clutch gear shaft 52 is in transmission connection with the first PTO output gear shaft 47 through a gear on shaft; the clutch gear shaft 52 and the second gear shaft 38 are in transmission connection through a second clutch 43; the second gear shaft 38 and the first output gear shaft 37 are in transmission connection through a gear on shaft; the clutch gear shaft 52 of the left side transmission device 3 and the right side transmission device 8 is respectively in transmission connection with the left side main engine 1 and the right side main engine 6; the clutch gear shaft 52 of the left side transmission device 3 and the output shaft of the left side main engine 1 are in transmission connection through the left side coupling 2, and the clutch gear shaft 52 of the right side transmission device 8 and the output shaft of the right side main engine 6 are in transmission connection through the right side coupling 7; the first output gear shaft 37 of the left side transmission device 3 and the right side transmission device 8 is respectively in transmission connection with the left side shafting 4 and the right side shafting 9; the first PTO output gear shaft 47 of the left side transmission device 3 and the right side transmission device 8 is in transmission connection with the intermediate transmission device 11; the second clutch 43 is a friction clutch;

[0035] When the second clutch 43 is connected, the power of the left side main engine 1 or the right side main engine 6 is transmitted to the first output pinion 40 through the second clutch 43, and through the meshing of the gear pair, the power is transmitted to the first output gear 32, and finally transmitted to the left side shafting 4, the left side propeller 5 or the right side shafting 9, the right side propeller 10 through the first output flange 36; the power of the left side main engine 1 or the right side main engine 6 is meshed with the first PTO output gear 45 through the clutch gear 49, and transmitted to the PTO output flange 48; the PTO output flange 48 of the left side transmission device 3 is connected with the first input flange 21, and the PTO output flange 48 of the right side transmission device 8 is connected with the second input flange 25.

[0036] As shown in Figure 4 , Figure 8 and Figure 9 When the present transmission device comprises two left side main engines 1 and two right side main engines 6, the two left side main engines 1 are respectively located on the front and rear sides of the left side transmission device 3; the two right side main engines 6 are respectively located on the front and rear sides of the right side transmission device 8; the left side transmission device 3 and the right side transmission device 8 each comprise a third clutch 81 and a fourth clutch 68; the third clutch 81 and the fourth clutch 68 in the left side transmission device 3 are respectively used for controlling the connection and disconnection between the two left side main engines 1 and the left side shafting 4; the third clutch 81 and the fourth clutch 68 in the right side transmission device 8 are respectively used for controlling the connection and disconnection between the two right side main engines 6 and the right side shafting 9.

[0037] The left side transmission device 3 and the right side transmission device 8 also each comprise a front clutch input shaft 83, a front gear shaft 63, a second output gear shaft 59, a rear clutch input shaft 66, a rear gear shaft 78, and a second PTO output gear shaft 76; the front clutch input shaft 83 is drivingly connected through a third clutch 81 and the front gear shaft 63; the rear clutch input shaft 66 is drivingly connected through a fourth clutch 68 and the rear gear shaft 78; the front gear shaft 63 is provided with a front gear 85 and a second output pinion 62, and the front gear 85, the rear gear shaft 78 shaft gear, and the second PTO output gear shaft 76 shaft gear are sequentially drivingly connected; the second output pinion 62 of the right side transmission device 8 is directly meshingly drivingly connected with the second output gear shaft 59 shaft gear; the left side transmission device 3 further comprises an idler shaft 86, and the second output pinion 62, the idler shaft 86 shaft idler 60, and the second output gear shaft 59 shaft gear are sequentially drivingly connected; the front clutch input shaft 83 and the rear clutch input shaft 66 of the left side transmission device 3 are respectively drivingly connected with the two left side main engines 1; the front clutch input shaft 83 of the left side transmission device 3 is drivingly connected with the output shaft of the front left side main engine 1 through a left side shaft coupling 2, and the rear clutch input shaft 66 of the left side transmission device 3 is drivingly connected with the output shaft of the rear left side main engine 1 through a left side shaft coupling 2; the front clutch input shaft 83 and the rear clutch input shaft 66 of the right side transmission device 8 are respectively drivingly connected with the two right side main engines 6; the front clutch input shaft 83 of the right side transmission device 8 is drivingly connected with the output shaft of the front right side main engine 6 through a right side shaft coupling 7, and the rear clutch input shaft 66 of the right side transmission device 8 is drivingly connected with the output shaft of the rear right side main engine 1 through a right side shaft coupling 7; the second output gear shaft 59 of the left side transmission device 3 and the right side transmission device 8 are respectively drivingly connected with the left side shafting 4 and the right side shafting 9; the second PTO output gear shaft 76 of the left side transmission device 3 and the right side transmission device 8 are each drivingly connected with the intermediate transmission device 11; the third clutch 81 and the fourth clutch 68 are each a friction clutch;

[0038] For the left side transmission device 3, when the third clutch 81 and the fourth clutch 68 are connected, the power of the front left side main engine 1 is transmitted to the second output pinion 62 through the third clutch 81, and through the gear pair engagement, the power is sequentially transmitted to the idler 60, the second output gear 54, and finally transmitted to the left side shafting 4 and the left side propeller 5 through the second output flange 58; the power of the rear left side main engine 1 is transmitted to the rear gear 71 through the fourth clutch 68, and through the gear pair engagement, the power is transmitted to the front gear 85, and then transmitted to the front gear shaft 63, and through the gear pair engagement, the power is sequentially transmitted to the idler 60, the second output gear 54, and finally transmitted to the left side shafting 4 and the left side propeller 5 through the second output flange 58, realizing the power parallel connection of the two left side main engines 1; wherein the idler 60 acts as a reversing device, which can keep the rotation directions of the left and right side main engines consistent, increasing the universality and maintainability of the parts; the rear gear 71 transmits the power to the second PTO output gear 73 through the gear pair engagement, and the second PTO output flange 77 is connected with the first input flange 21.

[0039] For the right side transmission device 8, when the third clutch 81 and the fourth clutch 68 are connected, the power of the front right side main engine 6 is transmitted to the second output pinion 62 through the third clutch 81, and through the gear pair engagement, the power is transmitted to the second output gear 54, and finally transmitted to the right side shafting 9 and the right side propeller 10 through the second output flange 58; the power of the rear right side main engine 6 is transmitted to the rear gear 71 through the fourth clutch 68, and through the gear pair engagement, the power is transmitted to the front gear 85, and then transmitted to the front gear shaft 63, and through the gear pair engagement, the power is transmitted to the second output pinion 62 and the second output gear 54, and finally transmitted to the right side shafting 9 and the right side propeller 10 through the second output flange 58, realizing the power parallel connection of the two right side main engines 6; the rear gear 71 transmits the power to the second PTO output gear 73 through the gear pair engagement, and the second PTO output flange 77 is connected with the second input flange 25.

[0040] The utility model discloses adopt preceding technical scheme, through setting up intermediate transmission 11, when the ship is in low speed working condition, can open one machine two oar mode, namely, control first clutch 14 engagement, simultaneously, only open arbitrary one host computer, whether open left-bank host computer 1 or right-bank host computer 6, this host computer can drive left-bank propeller 5 and right-bank propeller 10 rotation simultaneously, compared with the ship in prior art in low speed working condition for a long time, double host computer or four host computer low load operation, high oil consumption, poor emission problem, the utility model discloses in the ship in low speed working condition, can open one machine two oar mode, only one host computer operation, greatly reduced oil consumption and emission, simultaneously, according to the ship speed demand, host computer can be alone propulsion, also can double machine or multi -machine parallel car propulsion, effectively improve the maneuverability of ship power system, multiple host computers can independently run also can parallel car operation, when certain host computer failure, can use remaining host computer propulsion, effectively improve the redundancy and safety of power system.

[0041] The above merely describes the preferred embodiments of the utility model and is not intended to limit the utility model, and any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A twin propeller transmission device comprising a port transmission device (3), a port shafting (4), a port propeller (5), a starboard transmission device (8), a starboard shafting (9), a starboard propeller (10), at least one port main engine (1) and at least one starboard main engine (6), any port main engine (1), port transmission device (3), port shafting (4) and port propeller (5) being in transmission connection in sequence; any starboard main engine (6), starboard transmission device (8), starboard shafting (9) and starboard propeller (10) being in transmission connection in sequence, characterized in that: The intermediate transmission device (11) is connected between the left transmission device (3) and the right transmission device (8), and comprises a first clutch (14) for controlling the connection and disconnection of the left transmission device (3) and the right transmission device (8); when the first clutch (14) is engaged, any left main engine (1), left transmission device (3), intermediate transmission device (11), right transmission device (8), right shafting (9) and right propeller (10) are sequentially connected in transmission; any right main engine (6), right transmission device (8), intermediate transmission device (11), left transmission device (3), left shafting (4) and left propeller (5) are sequentially connected in transmission.

2. The twin propeller transmission of claim 1, wherein: The intermediate transmission device (11) further comprises an input shaft (20), a first gear shaft (13), an intermediate gear shaft (24) and an input gear shaft (26), the input shaft (20) and the first gear shaft (13) are connected in transmission through the first clutch (14), the first gear shaft (13), the intermediate gear shaft (24) and the input gear shaft (26) are sequentially connected in transmission through shaft gears; the first gear shaft (13) and the input gear shaft (26) have the same number of gear teeth; the input shaft (20) and the input gear shaft (26) are connected in transmission with the left transmission device (3) and the right transmission device (8) respectively, or the input shaft (20) and the input gear shaft (26) are connected in transmission with the right transmission device (8) and the left transmission device (3) respectively.

3. A twin propeller transmission as claimed in claim 1 or 2, characterised in that: The first clutch (14) is a friction clutch.

4. The twin propeller transmission of claim 2, wherein: The intermediate transmission device (11) further comprises a box body (12), the first gear shaft (13) and the intermediate gear shaft (24) are arranged in the box body (12), and the input shaft (20) and the input gear shaft (26) only have end portions extending out of the box body (12), and the first clutch (14) is hung on the outer wall of the box body (12).

5. A twin propeller transmission as claimed in claim 1 or 2, characterised in that: One left main engine (1) and one right main engine (6) are included.

6. The twin propeller transmission of claim 5, wherein: The left transmission device (3) and the right transmission device (8) each comprise a second clutch (43); the second clutch (43) in the left transmission device (3) is used for controlling the connection and disconnection between the left main engine (1) and the left shafting (4); the second clutch (43) in the right transmission device (8) is used for controlling the connection and disconnection between the right main engine (6) and the right shafting (9).

7. The twin propeller transmission of claim 6, wherein: The left side transmission (3) and the right side transmission (8) also each include a clutch gear shaft (52), a second gear shaft (38), a first output gear shaft (37), and a first PTO output gear shaft (47); the clutch gear shaft (52) and the first PTO output gear shaft (47) are connected by a shaft gear transmission; the clutch gear shaft (52) and the second gear shaft (38) are connected by a second clutch (43); the second gear shaft (38) and the first output gear shaft (37) are connected by a shaft gear transmission; the clutch gear shaft (52) of the left side transmission (3) and the right side transmission (8) is respectively connected to the left side main engine (1) and the right side main engine (6); the first output gear shaft (37) of the left side transmission (3) and the right side transmission (8) is respectively connected to the left side shafting (4) and the right side shafting (9); the first PTO output gear shaft (47) of the left side transmission (3) and the right side transmission (8) is connected to the intermediate transmission (11).

8. A twin propeller transmission as claimed in claim 1 or 2, characterised in that: The left side transmission (3) and the right side transmission (8) each include a third clutch (81) and a fourth clutch (68); the third clutch (81) and the fourth clutch (68) in the left side transmission (3) are respectively used to control the connection and disconnection between the two left side main engines (1) and the left side shafting (4); the third clutch (81) and the fourth clutch (68) in the right side transmission (8) are respectively used to control the connection and disconnection between the two right side main engines (6) and the right side shafting (9).

9. The twin propeller transmission of claim 8, wherein: The left side transmission (3) and the right side transmission (8) each include a third clutch (81) and a fourth clutch (68); the third clutch (81) and the fourth clutch (68) in the left side transmission (3) are respectively used to control the connection and disconnection between the two left side main engines (1) and the left side shafting (4); the third clutch (81) and the fourth clutch (68) in the right side transmission (8) are respectively used to control the connection and disconnection between the two right side main engines (6) and the right side shafting (9).

10. The twin propeller transmission of claim 9, wherein: The left side transmission (3) and the right side transmission (8) also each include a front clutch input shaft (83), a front gear shaft (63), a second output gear shaft (59), a rear clutch input shaft (66), a rear gear shaft (78), and a second PTO output gear shaft (76); the front clutch input shaft (83) is drivingly connected with the front gear shaft (63) through a third clutch (81); the rear clutch input shaft (66) is drivingly connected with the rear gear shaft (78) through a fourth clutch (68); the front gear shaft (63) is provided with a front gear (85) and a second output pinion (62), and the front gear (85), the rear gear shaft (78), and the second PTO output gear shaft (76) are sequentially drivingly connected; the second output pinion (62) of the right side transmission (8) is directly drivingly connected with the second output gear shaft (59); the left side transmission (3) further includes an idler shaft (86), and the second output pinion (62), the idler shaft (86), and the second output gear shaft (59) are sequentially drivingly connected; the front clutch input shaft (83) and the rear clutch input shaft (66) of the left side transmission (3) are respectively drivingly connected with two left side main engines (1); the front clutch input shaft (83) and the rear clutch input shaft (66) of the right side transmission (8) are respectively drivingly connected with two right side main engines (6); the second output gear shaft (59) of the left side transmission (3) and the right side transmission (8) is respectively drivingly connected with a left side shafting (4) and a right side shafting (9); and the second PTO output gear shaft (76) of the left side transmission (3) and the right side transmission (8) is drivingly connected with an intermediate transmission (11).

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