Power transmission system and turbine fracturing device having same

Abstract

The present application provides a power transmission system and a turbine fracturing device having same. The power transmission system comprises: an engine and a speed reduction mechanism which are drivingly connected, wherein the speed reduction mechanism is provided with a first power output part and a second power output part; and a speed regulation mechanism provided with a first power input part, a second power input part and a third power output part, wherein the first power input part is selectively connected to or disconnected from the first power output part, the second power input part is selectively connected to or disconnected from the second power output part, and the third power output part is drivingly connected to a structure to be driven. The power transmission system has a first splitting state, a second splitting state and a merging state. The technical solution provided by the present application can solve the problem in the prior art of inconvenience of regulating the output speed of a power transmission system.

Description

Power transmission system and turbine fracturing equipment having the same

[0001] This application claims priority to a patent application filed with the State Intellectual Property Office of China on November 30, 2023, with application number 202311640280.8 and application name “Power Transmission System”. Technical Field

[0002] The present application relates to the technical field of fracturing plunger pump driving, and in particular to a power transmission system and a turbine fracturing device having the same. Background Art

[0003] With the recent development of fracturing equipment, turbine-powered fracturing equipment has emerged. Compared to traditional diesel engines, turbine engines offer many advantages, including high power density per unit, the ability to run 100% on natural gas to reduce fuel costs, and more environmentally friendly engine emissions.

[0004] However, conventional power transmission systems with turbine engines offer a relatively simple speed adjustment method, and their speed adjustment performance is often limited by the power transmission system's shape, size, weight, and other characteristics. Consequently, conventional power transmission systems are not easily adaptable to the operating requirements of the driven structure.

[0005] Summary of the Invention

[0006] The main purpose of the present application is to provide a power transmission system and a turbine fracturing device having the same, so as to solve the problem in the prior art that it is inconvenient to adjust the output speed of the power transmission system.

[0007] In order to achieve the above-mentioned purpose, according to one aspect of the present application, a power transmission system is provided, including: an engine and a reduction mechanism, the engine is drivingly connected to the reduction mechanism, the reduction mechanism has a first power output part and a second power output part; a speed regulating mechanism, the speed regulating mechanism has a first power input part, a second power input part and a third power output part, the first power input part can be selectively connected or disconnected with the first power output part, the second power input part can be selectively connected or disconnected with the second power output part, and the third power output part is drivingly connected to the structure to be driven; wherein, the power transmission system has a first diversion state, a second diversion state and a merging state; when the power transmission system is in the first diversion state, the first power input part is connected to the first power output part, and the second power input part is disconnected from the second power output part; when the power transmission system is in the second diversion state, the first power input part is disconnected from the first power output part, and the second power input part is connected to the second power output part; when the power transmission system is in the merging state, the first power input part is connected to the first power output part, and the second power input part is connected to the second power output part.

[0008] Furthermore, the speed regulating mechanism includes a gear speed regulating structure; and / or the speed reducing mechanism includes a gear speed reducing structure.

[0009] Furthermore, the speed regulating mechanism includes a first planetary gear structure and a speed regulating gear, the first planetary gear structure includes a first sun gear, multiple first planetary gears and a first ring gear that are meshed in sequence, the first planetary gear structure also includes a rotatable first planetary gear bracket, multiple first planetary gears are connected to the first planetary gear bracket, and the speed regulating gear is meshed with the outer periphery of the first ring gear; wherein, a first power input shaft is provided on the speed regulating gear, and the first power input shaft forms a first power input part; a second power input shaft is provided on the first sun gear, and the second power input shaft forms a second power input part; a third power output shaft is provided on the first planetary gear bracket, and the third power output shaft forms a third power output part.

[0010] Furthermore, the power transmission system also includes a speed shifting mechanism and a power cut-off mechanism, the power cut-off mechanism has a power connection state and a power cut-off state; the speed shifting mechanism is arranged between the first power input part and the first power output part, and the power cut-off mechanism is arranged between the second power input part and the second power output part; or, the speed shifting mechanism is arranged between the second power input part and the second power output part, and the power cut-off mechanism is arranged between the first power input part and the first power output part.

[0011] Furthermore, the power cut-off mechanism includes a clutch and a brake; when the power cut-off mechanism is in a power connection state, the clutch engages with the first power output part or the second power output part, and the brake releases the brake; when the power cut-off mechanism is in a power cut-off state, the clutch disengages with the first power output part or the second power output part, and the brake applies braking.

[0012] Furthermore, the speed change mechanism is a multi-gear structure, and the speed change mechanism has a multi-gear speed regulation state and a neutral gear braking state; when the speed change mechanism is in the multi-gear speed regulation state, the speed change mechanism is used to decelerate the first power output part or the second power output part.

[0013] Furthermore, the reduction mechanism includes: a second planetary gear structure, the second planetary gear structure includes a second sun gear, multiple second planetary gears and a second ring gear that are meshed in sequence, the second planetary gear structure also includes a fixed second planetary gear bracket, and the multiple second planetary gears are all connected to the second planetary gear bracket; a parallel gear structure, the parallel gear structure includes a first parallel gear and a second parallel gear that are meshed with each other; the second ring gear is connected to the first parallel gear through a transmission shaft to drive the first parallel gear to rotate; a first power output shaft is provided on the first parallel gear, and the first power output shaft forms a first power output part; a second power output shaft is provided on the second parallel gear, and the second power output shaft forms a second power output part.

[0014] Furthermore, the speed changing mechanism is a variable frequency motor.

[0015] Furthermore, the structure to be driven includes: a deceleration module, the third power output part is drivingly connected to the power input end of the deceleration module; a plunger pump, the power output end of the deceleration module is drivingly connected to the plunger pump to drive the plunger pump to work.

[0016] Furthermore, the engine is a single-shaft turbine engine, a double-shaft turbine engine, or a three-shaft turbine engine.

[0017] According to another aspect of the present application, a turbine fracturing device is provided, comprising:

[0018] The power transmission system provided above;

[0019] A carrier, on which the power transmission system is mounted.

[0020] Furthermore, the turbo fracturing equipment also includes:

[0021] The muffler cabin is arranged on the carrier and has a muffler cavity. The engine of the power transmission system is arranged in the muffler cavity.

[0022] Furthermore, the turbo fracturing equipment also includes:

[0023] An air intake cabin is provided on the carrier, the inlet of the air intake cabin is used to admit gas, and the outlet of the air intake cabin is connected to the air intake of the engine; and / or,

[0024] a muffler disposed on the carrier, wherein the muffler inlet of the muffler is connected to the exhaust port of the engine to muffle the gas discharged through the exhaust port; and / or,

[0025] A fire protection system, at least part of which is arranged in the silencing chamber.

[0026] Furthermore, the turbo fracturing equipment also includes:

[0027] An auxiliary power system is provided on the carrier, and the engine of the power transmission system drives the auxiliary power system to operate;

[0028] The auxiliary power system includes at least one of a load component lubrication drive component, a lubricating oil cooling drive component, a ventilation drive component arranged in the silencer cavity, an air circuit system drive component, a control system drive component and an air compressor.

[0029] Furthermore, the carrier is a semi-trailer structure.

[0030] By applying the technical solution of the present application, the first power input part can be selectively connected or disconnected with the first power output part, and the second power input part can be selectively connected or disconnected with the second power output part. In this way, the power transmission system can be switched to the first diversion state, the second diversion state or the merging state, thereby facilitating corresponding state adjustment according to the specific working requirements of the structure to be driven, improving the speed regulation flexibility of the power transmission system, and facilitating adjustment of the output speed of the power transmission system according to the working requirements of the structure to be driven. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The drawings that constitute part of this application are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation on this application. In the drawings:

[0032] FIG1 shows a schematic diagram of a power transmission system provided according to a first embodiment of the present application;

[0033] FIG2 shows a schematic diagram of a speed regulation structure provided according to the first embodiment of the present application;

[0034] FIG3 shows a schematic diagram of a power cut-off structure provided according to the first embodiment of the present application;

[0035] FIG4 shows a schematic diagram of a deceleration structure provided according to the first embodiment of the present application;

[0036] FIG5 shows a schematic diagram of a structure to be driven according to the first embodiment of the present application;

[0037] FIG6 shows a schematic diagram of a power transmission system provided according to the second embodiment of the present application;

[0038] FIG7 shows a schematic diagram of a power transmission system provided according to the third embodiment of the present application;

[0039] FIG8 shows a schematic diagram of a power transmission system provided according to a fourth embodiment of the present application;

[0040] FIG9 shows a schematic structural diagram of a turbine fracturing device provided according to the fifth embodiment of the present application.

[0041] The above drawings include the following reference numerals: 10, engine; 20, reduction mechanism; 21, second planetary gear structure; 211, second sun gear; 212, second planetary gear; 213, second ring gear; 214, second planetary gear carrier; 22, parallel gear structure; 221, first parallel gear; 222, second parallel gear; 23, first power output shaft; 24, second power output shaft; 30, speed regulating mechanism; 31, first planetary gear structure; 32, speed regulating gear; 311, first sun gear; 312, first planetary gear; 313, first ring gear; 314, first planetary gear carrier; 33, first power input shaft; 34, second power input shaft; 35, third power output shaft; 40, speed changing mechanism; 50, power cut-off mechanism; 51, clutch; 52, brake; 60, structure to be driven; 61, reduction module; 62, plunger pump; 70. Carrier; 80. Silencer cabin; 90. Air intake cabin; 100. Muffler; 110. Fire protection system; 120. Diffuser; 130. Gearbox. DETAILED DESCRIPTION

[0042] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0043] As shown in Figures 1 to 5, an embodiment of the present application provides a power transmission system, which includes: an engine 10, a reduction gear 20, and a speed regulating mechanism 30. The engine 10 is drivingly connected to the reduction gear 20, and the reduction gear 20 has a first power output unit and a second power output unit. The speed regulating mechanism 30 has a first power input unit, a second power input unit, and a third power output unit. The first power input unit can be selectively connected to or disconnected from the first power output unit, the second power input unit can be selectively connected to or disconnected from the second power output unit, and the third power output unit is drivingly connected to a structure to be driven 60. Among them, the power transmission system has a first diversion state, a second diversion state and a merging state; when the power transmission system is in the first diversion state, the first power input part is connected to the first power output part, and the second power input part is disconnected from the second power output part; when the power transmission system is in the second diversion state, the first power input part is disconnected from the first power output part, and the second power input part is connected to the second power output part; when the power transmission system is in the merging state, the first power input part is connected to the first power output part, and the second power input part is connected to the second power output part.

[0044] The power transmission system provided in this embodiment selectively connects or disconnects the first power input unit with the first power output unit, and selectively connects or disconnects the second power input unit with the second power output unit. This allows the power transmission system to switch between a first diverging state, a second diverging state, or a merging state, thereby facilitating adjustment of the output speed of the drive structure according to the specific operating requirements of the driven structure 60, thereby improving the speed regulation flexibility of the power transmission system. Therefore, the technical solution provided in this application can solve the technical problem of the prior art of making it difficult to adjust the output speed of the power transmission system.

[0045] In this embodiment, the speed regulating mechanism 30 includes a gear speed regulating structure, which has a simple structure, stable transmission and low manufacturing cost.

[0046] The speed reduction mechanism 20 includes a gear reduction structure, which has a simple structure, stable transmission and low manufacturing cost.

[0047] In this embodiment, the speed regulating mechanism 30 includes a first planetary gear structure 31 and a speed regulating gear 32. The first planetary gear structure 31 includes a first sun gear 311, a plurality of first planetary gears 312, and a first ring gear 313, which are meshed in sequence. The first planetary gear structure 31 also includes a rotatable first planetary gear carrier 314. The plurality of first planetary gears 312 are connected to the first planetary gear carrier 314. The speed regulating gear 32 meshes with the outer periphery of the first ring gear 313. The speed regulating gear 32 is provided with a first power input shaft 33, which forms a first power input portion; the first sun gear 311 is provided with a second power input shaft 34, which forms a second power input portion; and the first planetary gear carrier 314 is provided with a third power output shaft 35, which forms a third power output portion.

[0048] In the power transmission system provided in this embodiment, when the first power output shaft 23 is connected to the first power input shaft 33 and the second power output shaft 24 is disconnected from the second power input shaft 34, the first power input shaft 33 drives the speed regulating gear 32, the speed regulating gear 32 drives the first ring gear 313, and the first ring gear 313 drives the first planetary gear carrier 314 to output power. At this time, the power system is in a first split state. When the second power output shaft 24 is connected to the second power input shaft 34 and the first power output shaft 23 is disconnected from the first power input shaft 33, the second power input shaft 34 drives the sun gear, which drives the first planetary gears 312, thereby driving the first planetary gear carrier 314 to output power. At this time, the power system is in a second split state. When the first power output shaft 23 is connected to the first power input shaft 33, and the second power output shaft 24 is connected to the second power input shaft 34, the speed regulating gear 32 drives the first ring gear 313 to adjust the speed of the first planetary gear carrier 314. The power on the first and second power output shafts 23 and 24 is ultimately output through the first planetary gear carrier 314, and the power system is now in a merging state. In this embodiment, the speed regulating gear 32 driven by the first power input shaft 33 and the first planetary gear driven by the second power input shaft 34 enable the power transmission system to adjust between a first diverging state, a second diverging state, and a merging state, thereby improving the speed regulation flexibility of the power transmission system.

[0049] In this embodiment, the power transmission system further includes a speed change mechanism 40 and a power cutoff mechanism 50. The power cutoff mechanism 50 has a power-connected state and a power-cutoff state. The speed change mechanism 40 is disposed between the first power input and the first power output, and the power cutoff mechanism 50 is disposed between the second power input and the second power output. Alternatively, the speed change mechanism 40 is disposed between the second power input and the second power output, and the power cutoff mechanism 50 is disposed between the first power input and the first power output.

[0050] With the power transmission system provided by this embodiment, the positions of the speed change mechanism 40 and the power cut-off mechanism 50 can be adjusted. They can be respectively arranged between the first power input and the first power output, between the second power input and the second power output, and between the second power input and the second power output, and between the first power input and the first power output. Specifically, the speed change mechanism 40 can facilitate flexible adjustment of the speed, and the power cut-off mechanism 50 can facilitate flexible power connection or switching. In this way, the power transmission system can not only adjust the state between the first diversion state, the second diversion state, and the confluence state, but also adjust the position of the speed change mechanism 40 and the power cut-off mechanism 50 according to different usage requirements, thereby further improving the speed regulation flexibility of the power transmission system.

[0051] In this embodiment, the power cutoff mechanism 50 includes a clutch 51 and a brake 52. When the power cutoff mechanism 50 is in the power-connected state, the clutch 51 engages the first or second power output unit, and the brake 52 releases the brake. When the power cutoff mechanism 50 is in the power-cutoff state, the clutch 51 disengages the first or second power output unit, and the brake 52 applies the brake. This structural arrangement effectively avoids forced engine braking when the clutch 51 is engaged. Especially for turbine engines, since the air compressor, combustion chamber, and compressor turbine of a turbine engine are all operating, a large amount of hot gas is still discharged from the exhaust end of the turbine engine. After exiting the combustion chamber, this hot gas still passes through the compressor turbine, driving the compressor turbine to rotate and, in turn, drive the air compressor. This hot gas then passes through the power turbine to the exhaust end. When this hot gas passes through the forcibly braked power turbine, the power turbine is still subjected to the high temperature and pressure of the combustion gas, thereby affecting the service life of the turbine of the turbine engine. By adopting the above arrangement, there is no need to forcibly brake the turbine engine, thereby avoiding the above situation and effectively increasing the service life of the power turbine.

[0052] In this embodiment, the speed change mechanism 40 has a multi-gear structure, having a multi-gear speed adjustment state and a neutral gear brake state. When in the multi-gear speed adjustment state, the speed change mechanism 40 is used to decelerate the first power output unit or the second power output unit. Thus, by switching the speed change mechanism 40 to the multi-gear speed adjustment state or the neutral gear brake state, the speed change mechanism 40 can be easily adjusted to multiple gears, or the speed change mechanism 40 can be used to disconnect power on both sides of the speed change mechanism 40, thereby facilitating state adjustments between a first diverting state, a second diverting state, and a merging state. Furthermore, the positions of the speed change mechanism 40 and the power disconnect mechanism 50 can be adjusted according to different usage requirements, thereby enhancing the speed adjustment flexibility of the power transmission system.

[0053] In this embodiment, the reduction mechanism 20 includes a second planetary gear structure 21 and a parallel gear structure 22. The second planetary gear structure 21 includes a second sun gear 211, a plurality of second planetary gears 212, and a second ring gear 213 that mesh in sequence. The second planetary gear structure 21 also includes a fixed second planetary gear carrier 214, with the plurality of second planetary gears 212 connected to the second planetary gear carrier 214. The parallel gear structure 22 includes a first parallel gear 221 and a second parallel gear 222 that mesh with each other. The second ring gear 213 is connected to the first parallel gear 221 via a transmission shaft to drive the first parallel gear 221 to rotate. The first parallel gear 221 is provided with a first power output shaft 23, which forms a first power output unit. The second parallel gear 222 is provided with a second power output shaft 24, which forms a second power output unit.

[0054] In the power transmission system provided by this embodiment, after the power of the engine 10 enters the reduction mechanism 20, it sequentially drives the second sun gear 211, the plurality of second planetary gears 212, and the second ring gear 213 to rotate. The second ring gear 213 is connected to the first parallel gear 221 via a transmission shaft, driving the first parallel gear 221 to rotate. The first parallel gear 221 then drives the second parallel gear 222, which meshes with it, to rotate, thereby outputting the power through the first power output shaft 23 on the first parallel gear 221 and the second power output shaft 24 on the second parallel gear 222. In this way, the power of the engine 10 is split into two parts through the second planetary gear structure 21 and the parallel gear structure 22, making it easier to adjust the diversion and merging state according to the specific working requirements of the driven structure 60, thereby improving the speed regulation flexibility of the power transmission system.

[0055] In this embodiment, the speed change mechanism 40 is a variable frequency motor. In this way, the speed can be adjusted by changing the frequency of the variable frequency motor, which is convenient for adjustment. In addition, the transmission of the variable frequency motor is stable, which facilitates stable speed regulation.

[0056] In this embodiment, the structure to be driven 60 includes a deceleration module 61 and a plunger pump 62, and the third power output part is driven and connected to the power input end of the deceleration module 61. The power output end of the deceleration module 61 is driven and connected to the plunger pump 62 to drive the plunger pump 62 to work. In this way, the power input of the plunger pump 62 is increased by the deceleration module 61, so that the working efficiency of the belt drive structure is improved. With such a structural arrangement, the engine 10 is a single-shaft turbine engine or a dual-shaft turbine engine or a three-shaft turbine engine. In this way, the power source can be adjusted and selected according to different power requirements and usage scenarios, thereby improving the speed regulation flexibility of the power transmission system and solving the technical problem in the prior art that it is not convenient to make adaptive adjustments according to the working requirements of the structure to be driven 60.

[0057] Specifically, as shown in FIG1 , embodiment 1 of the present application provides a power transmission system, in which a speed change mechanism 40 is arranged between a first power input part and a first power output part, and a power cut-off mechanism 50 is arranged between a second power input part and a second power output part.

[0058] In this embodiment, when the power transmission system is in the first split state, the speed change mechanism 40 is in a multi-speed regulation state, decelerating the first power output unit. The power cutoff mechanism 50 is in a power disconnection state, the clutch 51 is disengaged from the second power output unit, and the brake 52 is engaged. At this point, the power of the engine 10 is output from the first power output shaft 23 via the reduction mechanism 20, and then output through the speed change mechanism 40 to the first power input unit of the speed regulating mechanism 30. The power is then driven by the first power input shaft 33, which in turn drives the speed regulating gear 32, which in turn drives the first ring gear 313, thereby driving the first planetary gear carrier 314. The power is then output via the third power output shaft 35 provided on the first planetary gear carrier 314, ultimately driving the driven structure 60.

[0059] In this embodiment, when the power transmission system is in the second split state, the speed change mechanism 40 is in the neutral braking state, the power cutoff mechanism 50 is in the power connection state, the clutch 51 is engaged with the second power output unit, and the brake 52 is released. At this point, the power of the engine 10 is output from the second output unit via the reduction gear mechanism 20, and then output to the second power input unit of the speed regulating mechanism 30 via the power cutoff mechanism 50. The power is then driven by the second power input shaft 34, driving the first sun gear 311. The first sun gear 311 drives the first planetary gears 312, thereby driving the first planetary gear carrier 314 and outputting the power via the third power output shaft 35, ultimately driving the driven structure 60.

[0060] In this embodiment, when the power transmission system is in the merging state, the clutch 51 engages the second power output unit, and the brake 52 is released. At this point, the power of the engine 10 is output from the second output unit via the reduction gear mechanism 20, then output to the second power input unit of the speed control mechanism 30 via the power cutoff mechanism 50. The second power input shaft 34 drives the first sun gear 311 to rotate, which in turn drives the first planetary gears 312, thereby driving the first planetary gear carrier 314 and outputting the power through the third power output shaft 35. Simultaneously, the speed change mechanism 40 is in the multi-speed speed control state, reducing the speed of the first power output unit. The power of the engine 10 is output from the first power output shaft 23 via the reduction gear mechanism 20, then output to the first power input unit of the speed control mechanism 30 via the speed change mechanism 40. The speed change gear 32 is driven by the first power input shaft 33, which in turn drives the first ring gear 313, thereby driving the first planetary gear carrier 314 and regulating its speed. In this way, the power of the engine 10 passes through the power cut-off mechanism 50 and the speed change mechanism 40 respectively, and then merges through the first sun gear 311 and the speed regulating gear 32 of the speed regulating mechanism 30, and finally drives the driven structure 60 to work.

[0061] Specifically, as shown in Figure 6, Example 2 of the present application provides a power transmission system. The difference between the power transmission system in this embodiment and the power transmission system provided in Example 1 is that the driven structure 60 includes a plunger pump 62, and the speed regulation mechanism 30 also includes a deceleration module 61, that is, the deceleration module 61 is part of the speed regulation mechanism 30.

[0062] Specifically, as shown in FIG7 , in the third embodiment of the present application, the power cut-off mechanism 50 is provided between the first power input part and the first power output part, and the speed change mechanism 40 is provided between the second power input part and the second power output part.

[0063] In this embodiment, when the power transmission system is in the first split state, the speed change mechanism 40 is in a neutral braking state, the power cutoff mechanism 50 is in a power connection state, the clutch 51 is engaged with the first power output unit, the brake 52 is released, and the speed change mechanism 40 is in a neutral braking state. At this time, the power of the engine 10 is output from the first output unit via the reduction mechanism 20 and then output to the first power input unit of the speed regulating mechanism 30 via the power cutoff mechanism 50. The first power input shaft 33 drives the speed regulating gear 32, which in turn drives the first ring gear 313, thereby driving the first planetary gear carrier 314. The power is then output via the third power output shaft 35 provided on the first planetary gear carrier 314, ultimately driving the driven structure 60.

[0064] In this embodiment, when the power transmission system is in the second split state, the speed change mechanism 40 is in a multi-speed regulation mode, decelerating the second power output unit. The power cutoff mechanism 50 is in a power disconnection state, the clutch 51 is disengaged from the first power output unit, and the brake 52 is engaged. At this point, the power of the engine 10 is output from the second output unit via the speed reduction mechanism 20, and then output to the second power input unit of the speed control mechanism 30 via the speed change mechanism 40. The second power input shaft 34 drives the first sun gear 311, which in turn drives the first planetary gears 312, thereby driving the first planetary gear carrier 314 and outputting power through the third power output shaft 35, ultimately driving the driven structure 60.

[0065] In this embodiment, when the power transmission system is in the merging state, the clutch 51 engages the first power output unit, and the brake 52 is released. At this point, the power of the engine 10 is output from the first output unit via the reduction gear 20 and then to the first power input unit of the speed regulating mechanism 30 via the power cutoff mechanism 50. The first power input shaft 33 drives the speed regulating gear 32, which in turn drives the first ring gear 313, regulating the speed of the first planetary gear carrier 314. Simultaneously, the speed change mechanism 40 is in the multi-speed speed control state, reducing the speed of the second power output unit. The power of the engine 10 is output from the second output unit via the reduction gear 20 and then to the second power input unit of the speed regulating mechanism 30 via the speed change mechanism 40. The second power input shaft 34 drives the first sun gear 311, which in turn drives the first planetary gears 312, thereby driving the first planetary gear carrier 314 and outputting the power through the third power output shaft 35. In this way, the power of the engine 10 passes through the power cut-off mechanism 50 and the speed change mechanism 40 respectively, and then merges through the first sun gear 311 and the speed regulating gear 32 of the speed regulating mechanism 30, and finally drives the driven structure 60 to work.

[0066] Specifically, the speed regulating mechanism 30 operates as follows: power from upstream is input through the second input shaft, which in turn drives the first sun gear 311 to rotate. The first sun gear 311 drives the first planetary gears 312 to rotate, which in turn drives the first planetary gear carrier 314 to rotate. The first planetary gear carrier 314 rotates with the third power output shaft 35. In addition, the first ring gear 313 is driven by the speed regulating gear 32. Based on the equation for a single-row planetary gear: n sun +αn annulus -(1+α)n carrier =0, where nsun is the speed of the first sun gear 311; n annulus is the speed of the first gear ring 313, ncarrier is the speed of the first planetary gear carrier 314, α is the number of teeth z of the first ring gear 313 annulus The number of teeth of the first sun gear 311 is z sun The ratio of α = z annulus / z sun , and α>1. Therefore, the speed n of the first planetary gear carrier 314 is carrier =(n sun +αn annulus ) / (1+α). Based on the above formula, when the first ring gear 313 has no rotation speed, that is, when the rotation speed of the first ring gear 313 is 0, the rotation speed n of the first planetary gear carrier 314 is carrier =n sun / (1+α), that is, the rotational speed of the third power output shaft 35 is determined only by the speed ratio α between the first ring gear 313 and the first sun gear 311 .

[0067] When the first power input shaft 33 rotates, the first power input shaft 33 drives the speed regulating gear 32 to rotate, and the speed regulating gear 32 drives the first ring gear 313 to rotate. At this time, the speed n of the first planetary gear support 314 is carrier =(n sun +αn annulus ) / (1+α), so that when the rotation speed of the first power input shaft 33 is the highest, that is, when the rotation speed of the corresponding first ring gear 313 is the highest, the rotation speed of the first planetary gear carrier 314, that is, the rotation speed of the third power output shaft 35 reaches the maximum.

[0068] Specifically, as shown in Figure 8, embodiment 4 of the present application provides a power transmission system. The difference between the power transmission system in this embodiment and the power transmission system in embodiment 3 is that the driven structure 60 includes a plunger pump 62, and the speed regulation mechanism 30 also includes a deceleration module 61, that is, the deceleration module 61 is part of the speed regulation mechanism 30.

[0069] As shown in FIG9 , the fifth embodiment of the present application provides a turbine fracturing device, which includes: the power transmission system provided in the above embodiment and a carrier 70 , where the power transmission system is installed on the carrier 70 .

[0070] Specifically, the turbo fracturing equipment further includes a muffler cabin 80, which is disposed on the carrier 70 and has a muffler cavity, in which the engine 10 of the power transmission system is disposed. This structural arrangement can facilitate reducing the noise generated by the engine 10.

[0071] In this embodiment, the turbofracturing apparatus further includes an air intake chamber 90, which is disposed on the carrier 70. The inlet of the air intake chamber 90 is used to admit gas, and the outlet of the air intake chamber 90 communicates with the air intake of the engine 10. This facilitates the intake of air into the muffler chamber 80. Specifically, the air intake chamber 90 is located above the muffler chamber 80.

[0072] Specifically, the turbo fracturing equipment in this embodiment further includes a muffler 100, which is disposed on the carrier 70. The muffler inlet of the muffler 100 is connected to the exhaust port of the engine 10 to muffle the gas discharged through the exhaust port, thereby providing external gas to the muffler 100.

[0073] Specifically, the turbo fracturing equipment further includes a diffuser 120 , which is disposed between the muffler inlet and the exhaust port of the muffler 100 , so as to diffuse the gas through the diffuser 120 , thereby facilitating better noise reduction.

[0074] In this embodiment, the turbofracturing equipment also includes a fire protection system 110, at least partially disposed within the silencing chamber. This configuration facilitates fire safety for the structures within the silencing chamber. Specifically, the fire protection system 110 includes a nozzle, a sensing component, and a pipeline. The nozzle and sensing component are disposed within the silencing chamber. The pipeline is connected to the nozzle, with a portion of the pipeline located within the silencing chamber and another portion located outside.

[0075] Specifically, the turbofracturing equipment also includes an auxiliary power system, which is mounted on a carrier 70 and driven by the powertrain's engine. The auxiliary power system includes at least one of a load component lubrication drive component, a lubricating oil cooling drive component, a ventilation drive component within the muffler chamber, an air system drive component, a control system drive component, and an air compressor. This structural arrangement facilitates the operation of the auxiliary power system, ensuring the simultaneous operation of other components while fracturing is underway.

[0076] Specifically, the auxiliary power system takes power from the engine, and the power take-off position of the auxiliary power system may be on the gearbox 130 , or on the speed reduction box or at the power take-off port.

[0077] Specifically, the load component lubrication drive component provides lubricant-driven power to the load components. This includes the fracturing plunger pump lubrication system, turbine lubrication system, high-speed reduction gearbox lubrication system, transmission lubrication system, and clutch brake lubrication system. The lubricant oil cooling drive component cools the lubricant oil as it flows through the equipment during the lubrication process, removing heat generated within the load components. The lubricant oil needs to be recycled, so the lubricant oil cooling drive component is required. The air system drive component supplies compressed air to components on the equipment that require compressed air. For example, the shutoff valve on the gas system and the bleed valve on the turbine require compressed air to open during operation, and compressed air is also required to purge dust from the inertial separator. The control system drive component includes a battery system, a generator, and a hydraulic motor. Because the control system requires a 24V power supply, a battery system is included. The 24V generator continuously powers the battery system, and the components driving the generator can be driven by a hydraulic motor or other means. An air compressor provides compressed air at a certain pressure to the air system.

[0078] Specifically, the turbofracturing equipment in this embodiment further includes an intake volute, which provides a passage for air to enter the engine 10. That is, after passing through the inertial separator, filter, and silencer of the intake device, the air, due to space constraints, needs to pass through the intake volute again before finally entering the air intake of the engine 10. Specifically, the engine 10 is a turbine.

[0079] Specifically, the ventilation driving component is used to drive the air intake or air exhaust process of the muffler cavity.

[0080] Specifically, the carrier is a semi-trailer structure, which is convenient for connection with the vehicle body and for location transfer.

[0081] From the above description, it can be seen that the above-mentioned embodiments of the present application achieve the following technical effects: by selectively connecting or disconnecting the first power input part with the first power output part, and selectively connecting or disconnecting the second power input part with the second power output part, the power transmission system can be switched to the first diversion state or the second diversion state or the merging state, and the speed regulation requirements are achieved by using different states; in the merging state, the speed of the third power output shaft 35 is adjusted by the first ring gear 313, thereby improving the speed regulation flexibility of the power transmission system; by changing the first power input part, the first power output part, and the connecting member between the first power input part and the second power output part, the power output mode can also be changed, and different speed regulation requirements are achieved by using different structures. In summary, the power drive system proposed in the present application can make corresponding state adjustments according to the specific working requirements of the structure to be driven, which greatly improves the speed regulation flexibility of the power transmission system.

[0082] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0083] Unless otherwise specifically stated, the relative arrangement of the parts and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to actual proportional relationships. The techniques, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values ​​should be interpreted as being merely exemplary and not as limitations. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0084] In the description of this application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of this application; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0085] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0086] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0087] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A power transmission system, characterized in that: include: An engine (10) and a reduction mechanism (20), wherein the engine (10) is drivingly connected to the reduction mechanism (20), and the reduction mechanism (20) has a first power output part and a second power output part; A speed regulating mechanism (30), the speed regulating mechanism (30) comprising a first power input part, a second power input part and a third power output part, the first power input part can be selectively connected to or disconnected from the first power output part, the second power input part can be selectively connected to or disconnected from the second power output part, and the third power output part is drivingly connected to a structure to be driven (60); The power transmission system has a first split state, a second split state and a merge state; when the power transmission system is in the first split state, the first power input part is connected to the first power output part, and the second power input part is disconnected from the second power output part; When the power transmission system is in the second diversion state, the first power input is disconnected from the first power output, and the second power input is connected to the second power output; when the power transmission system is in the merging state, the first power input is connected to the first power output, and the second power input is connected to the second power output.

2. The power transmission system according to claim 1, characterized in that: The speed regulating mechanism (30) comprises a gear speed regulating structure; and / or, The speed reduction mechanism (20) comprises a gear speed reduction structure.

3. The power transmission system according to claim 1, characterized in that: The speed regulating mechanism (30) comprises a first planetary gear structure (31) and a speed regulating gear (32); the first planetary gear structure (31) comprises a first sun gear (311), a plurality of first planetary gears (312) and a first ring gear (313) which are meshed in sequence; the first planetary gear structure (31) further comprises a first planetary gear support (314) which is rotatably arranged; the plurality of first planetary gears (312) are all connected to the first ring gear (313); and the speed regulating gear (32) is meshed with an outer periphery of the first ring gear (313); Wherein, the speed regulating gear (32) is provided with a first power input shaft (33), and the first power input shaft (33) forms the first power input part; the first sun gear (311) is provided with a second power input shaft (34), and the second power input shaft (34) forms the second power input part; the first ring gear (313) is provided with a third power output shaft (35), and the third power output shaft (35) forms the third power output part.

4. The power transmission system according to claim 1, characterized in that: The power transmission system further comprises a speed change mechanism (40) and a power cut-off mechanism (50), wherein the power cut-off mechanism (50) has a power connection state and a power cut-off state; The speed change mechanism (40) is arranged between the first power input part and the first power output part, and the power cut-off mechanism (50) is arranged between the second power input part and the second power output part; or, The speed change mechanism (40) is arranged between the second power input part and the second power output part, and the power cut-off mechanism (50) is arranged between the first power input part and the first power output part.

5. The power transmission system according to claim 4, characterized in that: The power cut-off mechanism (50) comprises a clutch (51) and a brake (52); when the power cut-off mechanism (50) is in the power connection state, the clutch (51) is engaged with the first power output part or the second power output part, and the brake (52) releases the brake; when the power cut-off mechanism (50) is in the power cut-off state, the clutch (51) is disengaged from the first power output part or the second power output part, and the brake (52) performs braking.

6. The power transmission system according to claim 4, characterized in that: The speed change mechanism (40) is a multi-gear structure, and the speed change mechanism (40) has a multi-gear speed regulation state and a neutral gear braking state; when the speed change mechanism (40) is in the multi-gear speed regulation state, the speed change mechanism (40) is used to decelerate the first power output unit or the second power output unit.

7. The power transmission system according to claim 1, characterized in that: The speed reduction mechanism (20) comprises: A second planetary gear structure (21), the second planetary gear structure (21) comprising a second sun gear (211), a plurality of second planetary gears (212) and a second ring gear (213) meshed in sequence, the second planetary gear structure (21) further comprising a fixedly arranged second planetary gear support (214), the plurality of second planetary gears (212) all being connected to the second planetary gear support (214); A parallel gear structure (22), wherein the parallel gear structure (22) comprises a first parallel gear (221) and a second parallel gear (222) meshing with each other; the second gear ring (213) is connected to the first parallel gear (221) via a first power output shaft (23) to drive the first parallel gear (221) to rotate; the first power output shaft (23) forms the first power output part, and the second parallel gear (222) is provided with a second power output shaft (24), and the second power output shaft (24) forms the second power output part.

8. The power transmission system according to claim 4, characterized in that: The speed change mechanism (40) is a variable frequency motor.

9. The power transmission system according to claim 1, characterized in that: The structure to be driven (60) comprises: A deceleration module (61), wherein the third power output part is drivingly connected to a power input end of the deceleration module (61); A plunger pump (62), wherein the power output end of the deceleration module (61) is drivingly connected to the plunger pump (62) to drive the plunger pump (62) to work.

10. The power transmission system according to any one of claims 1 to 9, characterized in that: The engine (10) is a single-shaft turbine engine, a double-shaft turbine engine, or a three-shaft turbine engine.

11. A turbo fracturing device, characterized in that: include: The power transmission system according to any one of claims 1 to 10; A carrier (70), the power transmission system being mounted on the carrier (70).

12. The turbo fracturing equipment according to claim 11, characterized in that: The turbo fracturing equipment also includes: A soundproofing cabin (80) is arranged on the carrier (70), the soundproofing cabin (80) having a soundproofing cavity, and the engine (10) of the power transmission system is arranged in the soundproofing cavity.

13. The turbo fracturing equipment according to claim 12, characterized in that: The turbo fracturing equipment also includes: an air intake cabin (90) disposed on the carrier (70), the inlet of the air intake cabin (90) being used to introduce gas, and the outlet of the air intake cabin (90) being in communication with the air intake of the engine (10); and / or, a muffler (100) disposed on the carrier (70), wherein a muffler inlet of the muffler (100) is connected to an exhaust port of the engine (10) so as to muffle gas discharged through the exhaust port of the engine (10); and / or, A fire fighting system (110), at least a portion of which is disposed in the silencing chamber.

14. The turbo fracturing device according to claim 12, characterized in that: The turbo fracturing equipment also includes: An auxiliary power system is arranged on the carrier (70), and the engine (10) of the power transmission system drives the auxiliary power system to operate; Wherein, the auxiliary power system includes: a load component lubrication drive component, a lubricating oil cooling drive component, a ventilation drive component arranged in the silencer chamber, an air circuit system drive component, a control system drive component and at least one of an air compressor.

15. The turbo fracturing equipment according to claim 11, characterized in that: The carrier is a semi-trailer structure.

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