Fluid vortex boost retarder

Abstract

The invention discloses a liquid vortex boost retarder, comprising a liquid resistance retarder pump, a clutch device, a transmission device, a high-pressure circulation pump and a liquid medium box; the liquid resistance retarder pump comprises a pump body, a main shaft and a pump wheel on the main shaft, the pump body is provided with an inlet and an outlet, the outlet is connected to the liquid medium box, and the inlet is connected to the liquid medium box through the high-pressure circulation pump; the main shaft is connected to the clutch device through transmission, the clutch device is connected to the transmission device through a power universal shaft, and the transmission device is connected to the rotating shaft of the high-pressure circulation pump; the transmission device comprises a speed increaser, the speed increaser comprises a speed increaser housing, an input shaft and an output shaft are arranged in the speed increaser housing, the input shaft is connected to the power universal shaft through transmission, the output shaft is connected to the rotating shaft through transmission, a speed change mechanism is arranged between the output shaft and the input shaft, and the transmission ratio between the output shaft and the input shaft can be switched between equal to 1 and greater than 1. The braking effect under low speed conditions can be effectively improved.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical braking, and in particular relates to a liquid vortex boosting retarder. Background Art

[0002] A Chinese patent with publication number CN105221617B discloses a liquid vortex vehicle retarder, comprising a liquid resistance retarder pump, a clutch device, a transmission device, a high-pressure circulating pump and a water cooling device; the water cooling device comprises a cooling box and a fan device; the liquid resistance retarder pump comprises a pump body, a main shaft and a pump wheel on the main shaft; one end of the main shaft is connected to the output shaft of the automobile gearbox, and the other end is connected to the rear axle drive shaft of the automobile; an inlet and an outlet are provided on the pump body, the outlet is connected to the cooling box of the water cooling device, and the inlet is connected to the cooling box through a high-pressure circulating pump; the end of the main shaft close to the rear axle of the automobile is connected to the clutch device through a gear transmission, the clutch device is connected to the transmission device through a power universal shaft, and the transmission device is respectively connected to the rotating shaft of the high-pressure circulating pump and the fan shaft of the fan device; the transmission device The device includes a box body, in which a first shaft is arranged, one end of the first shaft is connected to a power universal shaft, and the other end is connected to a second shaft through a gear transmission, the second shaft is connected to a third shaft through a gear transmission, and one end of the third shaft is connected to a fan shaft of a fan device through a belt transmission; the third shaft is connected to one end of a rotating shaft of a high-pressure circulation pump through a gear transmission; the clutch device comprises a clutch gear connected to one end of a main shaft in a hydraulic resistance retarder pump through a gear transmission, a clutch support, a clutch body, a pneumatic valve for controlling the clutch body, and a clutch gear box fixedly connected to a pump body of the hydraulic resistance retarder pump; the cooling box is externally connected to a liquid medium replenishment box; a degassing interface is provided on the cooling box, and the liquid medium replenishment box cover is connected through a hose, and a one-way valve is provided on the liquid medium replenishment box cover.

[0003] The liquid vortex vehicle retarder can meet the technical purpose of assisting the vehicle to slow down, but to achieve the braking effect, it is necessary to provide the liquid resistance retarder pump with a water flow of sufficient pressure, that is, the water flow output by the high-pressure circulating pump needs to have sufficient water pressure, and the high-pressure circulating pump needs to reach a sufficient speed. However, as the vehicle speed decreases, the speed of the main shaft connected to the output shaft of the gearbox decreases, which in turn causes the speed of the rotating shaft of the high-pressure circulating pump connected to the main shaft transmission to decrease, resulting in a decrease in the water pressure of the water flow output by the high-pressure circulating pump, that is, a decrease in the water pressure in the liquid resistance retarder pump, which ultimately causes the liquid vortex vehicle retarder to not have a sufficient braking effect. That is, the liquid vortex vehicle retarder has a sufficient braking effect under higher parking conditions, but the braking effect decreases when the vehicle speed decreases, that is, the liquid vortex vehicle retarder cannot meet the braking requirements of low-speed vehicles. Summary of the invention

[0004] In view of this, an object of the present invention is to provide a liquid vortex booster retarder that can effectively improve the braking effect under low-speed conditions.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] A liquid vortex boost retarder, comprising a liquid resistance retarder pump, a clutch device, a transmission device, a high-pressure circulation pump and a liquid medium box; the liquid resistance retarder pump comprises a pump body, a main shaft and a pump wheel on the main shaft, the pump body is provided with an inlet and an outlet, the outlet is connected to the liquid medium box, and the inlet is connected to the liquid medium box through the high-pressure circulation pump; the main shaft is transmission-connected to the clutch device, the clutch device is connected to the transmission device through a power universal shaft, and the transmission device is connected to the rotating shaft of the high-pressure circulation pump;

[0007] The transmission device includes a speed increaser, which includes a speed increaser body, in which an input shaft and an output shaft are arranged, the input shaft is transmission-connected to the power universal shaft, the output shaft is transmission-connected to the rotating shaft, a speed change mechanism is arranged between the output shaft and the input shaft, and the transmission ratio between the output shaft and the input shaft can be switched between equal to 1 and greater than 1.

[0008] Furthermore, a continuously variable transmission mechanism is provided between the input shaft and the output shaft; or a gear transmission mechanism is provided between the input shaft and the output shaft.

[0009] Further, the gear transmission mechanism includes a double-toothed shaft, on which a first gear and a second gear that rotate synchronously therewith are provided; the input shaft and the output shaft are coaxially arranged, and the input shaft is provided with an input gear that meshes with the first gear, and the output shaft is provided with an output gear that meshes with the second gear, a synchronizer is provided between the input shaft and the output shaft, and the speed increaser case is provided with a shifting mechanism for driving the synchronizer to move and make the input shaft and the output shaft rotate synchronously or make the input shaft and the output shaft rotate independently of each other.

[0010] Further, a transmission ratio between the input gear and the first gear is less than 1, and a transmission ratio between the second gear and the output gear is less than 1.

[0011] Furthermore, the input gear is rotatably fitted on the input shaft, and the output gear rotates synchronously with the output shaft; the synchronizer is located between the input gear and the output gear, and the synchronizer is slidably fitted with the input shaft in a single degree of freedom, and a synchronous coupling structure is provided between the input gear and the output gear and the synchronizer respectively.

[0012] Furthermore, the synchronous coupling structure includes synchronous sockets that are evenly distributed in an annular manner on both side surfaces of the synchronizer, and synchronous plugs for cooperating with the corresponding synchronous sockets are respectively provided on the sides of the input gear and the output gear that face each other.

[0013] Furthermore, the synchronizer and the input shaft are spline-matched.

[0014] Furthermore, the shift mechanism includes a shift cylinder, a shift plate rotatably mounted on the speed increasing case, and a shift fork for driving the synchronizer to move, the cylinder body of the shift cylinder is hingedly connected to the speed increasing case, the piston rod is hingedly connected to one end of the shift plate, and the shift fork is hingedly connected to the other end of the shift plate.

[0015] Furthermore, an electromagnetic reversing valve and a control circuit for controlling the action of the electromagnetic reversing valve are provided on the gas path of the shift cylinder, and the control circuit is connected to the on-board computer, which is also connected with a speed sensor for detecting the spindle speed and a clutch signal sensor for detecting the clutch state of the clutch device; the on-board computer collects the speed data collected by the speed sensor and the clutch signal data collected by the clutch signal sensor in real time, and when the clutch device is in a engaged state and the spindle speed is lower than a set threshold, the electromagnetic reversing valve is controlled to act through the control circuit, so that the transmission ratio of the speed increaser is greater than 1; when the clutch device is in a engaged state and the spindle speed is not lower than a set threshold, the electromagnetic reversing valve is controlled to act through the control circuit, so that the transmission ratio of the speed increaser is equal to 1.

[0016] Furthermore, it also includes a fan device for cooling the liquid medium in the liquid medium box; the transmission device also includes a gear transmission box, the gear transmission box includes a gear box body, a first shaft and a second shaft are provided in the gear box body, one end of the first shaft is transmission-connected to the output shaft, and the other end is transmission-connected to the rotating shaft, the first shaft and the second shaft are transmission-connected, and the second shaft is transmission-connected to the fan shaft of the fan device.

[0017] The beneficial effects of the present invention are:

[0018] The liquid vortex supercharged retarder of the present invention is achieved by arranging a speed increasing box in the transmission device and a speed changing mechanism in the speed increasing box. In this way, when the main shaft speed is high, the transmission ratio of the speed increasing box is 1. At this time, the liquid vortex supercharged retarder of the present invention can achieve retarding braking like a traditional retarder, that is, at this time, the speed of the rotating shaft connected to the main shaft transmission is high, and the high-pressure circulation pump can provide high-pressure liquid medium for the liquid resistance retarder pump, so as to achieve the technical purpose of braking; as the main shaft speed decreases, the speed of the rotating shaft decreases accordingly. At this time, the pressure of the liquid medium provided by the high-pressure circulation pump is low, and the braking effect is significantly reduced. At this time, the transmission ratio of the speed increasing box can be made greater than 1 through the speed changing mechanism to increase the speed of the rotating shaft, thereby increasing the pressure of the output liquid medium of the high-pressure circulation pump and improving the braking effect; in this way, the liquid vortex supercharged retarder of the present invention can achieve ideal braking effects under high and low speed conditions by arranging a speed increasing box and switching the transmission ratio of the speed increasing box according to the main shaft speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to make the purpose, technical solution and beneficial effects of the present invention clearer, the present invention provides the following drawings for illustration:

[0020] Figure 1 It is a structural schematic diagram of an embodiment of a liquid vortex boosting retarder of the present invention;

[0021] Figure 2 is a schematic diagram of the structure of the transmission device;

[0022] Figure 3 for Figure 2 AA section view;

[0023] Figure 4 It is the structural schematic diagram of the speed increasing box;

[0024] Figure 5 for Figure 4 BB cross-sectional view;

[0025] Figure 6 for Figure 5 A top view of

[0026] Figure 7 for Figure 6 CC cross-sectional view.

[0027] Description of reference numerals:

[0028] 1. Fluid resistance retarder pump; 2. Clutch device; 3. Transmission device; 4. High-pressure circulation pump; 5. Liquid medium tank; 6. Fan device; 7. Transmission output shaft; 8. Rear axle transmission shaft; 9. Solenoid valve; 10. Flow control valve; 11. Check valve; 12. Power universal shaft; 13. Liquid medium tank; 14. Liquid medium tank cover;

[0029] 101 pump body; 102 main shaft; 103 front pump wheel; 104 rear pump wheel; 105 inlet; 106 outlet; 107 main body; 108 front positioning box; 109 rear positioning box; 110 bearing; 111 front flange; 112 rear flange; 201 clutch gear; 202 clutch support; 203 clutch main body; 204 pneumatic valve; 205 clutch gear box; 301 box; 302 transmission device; 303 first shaft; 304 second shaft; 305 box; 306 input shaft; 307 output shaft; 308 double gear shaft; 309 first gear; 310 second gear; 311-input gear; 312 output gear; 313 synchronizer; 314 synchronization jack; 315 synchronization plug column; 316 synchronization plug column; 317 shift cylinder; 318 shift plate; 319 shift fork;

[0030] 401 rotating shaft; 501 degassing interface; 601 fan protection cover; 602 fan bracket; 603 fan shaft; 604 fan blade. DETAILED DESCRIPTION

[0031] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0032] like Figure 1 The figure shows a schematic diagram of the structure of an embodiment of the liquid vortex boost retarder of the present invention. The liquid vortex vehicle retarder of this embodiment comprises a liquid resistance retarder pump 1, a clutch device 2, a transmission device 3, a high-pressure circulation pump 4 and a liquid medium tank 5. The liquid resistance retarder pump 1 comprises a pump body 101, a main shaft 102 and a pump wheel on the main shaft 102. The pump body is provided with an inlet 105 and an outlet 106. The outlet 106 is connected to the liquid medium tank 5, and a one-way valve 11 and a flow control valve 10 are also provided therebetween; the inlet 105 is connected to the liquid medium tank 5 through the high-pressure circulation pump 4, and a solenoid valve 9 is also provided between the inlet 105 and the high-pressure circulation pump 4; the main shaft 102 is connected to the clutch device 2 through a gear transmission mechanism, the clutch device 2 is connected to the transmission device 3 through a power universal shaft 12, and the transmission device 3 is connected to the rotating shaft 401 of the high-pressure circulation pump 4.

[0033] Specifically, the pump body 101 includes a main body 107, a front positioning box body 108 and a rear positioning box body 109, the main shaft 102 is arranged among the main body 107, the front positioning box body 108 and the rear positioning box body 109, and the main shaft 102 is connected to the front and rear positioning boxes through bearings 110; the pump wheel includes a front pump wheel 103 and a rear pump wheel 104, and they form multiple spiral vortex chambers with the pump body 101 respectively.

[0034] The transmission device 3 includes a speed increasing box 302 and a gear transmission box. The gear transmission box includes a housing 301. A first shaft 303 and a second shaft 304 are arranged in the gear housing 301. One end of the first shaft 303 is transmission-connected to the output shaft 307 and the other end is transmission-connected to the rotating shaft 401. The first shaft 303 and the second shaft 304 are transmission-connected to each other. The second shaft 304 is transmission-connected to the fan shaft 603 of the fan device 6 through a belt transmission mechanism. The speed increasing box 302 includes a speed increasing box 305. An input shaft 306 and an output shaft 307 are arranged in the speed increasing box 305. The input shaft 306 is transmission-connected to the power universal shaft 12. The output shaft 307 is transmission-connected to the rotating shaft 401. A speed changing mechanism is arranged between the output shaft 307 and the input shaft 306 so that the transmission ratio between the output shaft 307 and the input shaft 306 can be switched between equal to 1 and greater than 1.

[0035] The clutch device 2 includes a clutch gear 201 connected to one end of the main shaft 102 in the hydraulic resistance retarder pump 1 through a gear transmission, a clutch support 202, a clutch body 203, a pneumatic valve 204 for controlling the clutch body 203, and a clutch gear box 205 fixedly connected to the pump body 101 of the hydraulic resistance retarder pump 1.

[0036] The liquid medium box 5 is connected to the replenishing liquid medium box 13 through a hose, and the liquid medium can be directly added to the liquid medium box 5 from the replenishing liquid medium box 13. The liquid medium box 5 is provided with a degassing interface 501, and is connected to the replenishing liquid medium box cover 14 through a hose. A one-way valve is provided on the replenishing liquid medium box cover 14. When the temperature in the liquid medium box 5 increases, the gas pressure in the liquid medium box 5 increases, and the gas will flow from the degassing interface 501 to the replenishing liquid medium box cover 14 and be discharged from the one-way valve; when the gas pressure decreases, the one-way valve on the replenishing liquid medium box cover 14 is closed.

[0037] Further, a continuously variable transmission mechanism is provided between the input shaft 306 and the output shaft 307; or a gear transmission mechanism is provided between the input shaft 306 and the output shaft 307. A gear transmission mechanism is provided between the input shaft 306 and the output shaft 307 of this embodiment. Specifically, the gear transmission mechanism includes a double-toothed shaft 308, on which a first gear 309 and a second gear 310 that rotate synchronously are provided; the input shaft 306 and the output shaft 307 are coaxially arranged, and an input gear 311 meshing with the first gear 309 is provided on the input shaft 306, and an output gear 312 meshing with the second gear 310 is provided on the output shaft 307, a synchronizer 313 is provided between the input shaft 306 and the output shaft 307, and a shifting mechanism for driving the synchronizer 313 to move and make the input shaft 306 and the output shaft 307 rotate synchronously or make the input shaft 306 and the output shaft 307 rotate independently of each other is provided on the speed increasing case 305. Specifically, in this embodiment, the transmission ratio between the input gear 311 and the first gear 309 is less than 1, and the transmission ratio between the second gear 310 and the output gear 312 is less than 1.

[0038] Furthermore, the input gear 311 of this embodiment is rotationally fitted on the input shaft 306, and the output gear 312 rotates synchronously with the output shaft 307; the synchronizer 313 is located between the input gear 311 and the output gear 312, and the synchronizer 313 and the input shaft 306 are slidably matched with each other in a single degree of freedom, and a synchronous coupling structure is provided between the input gear 311 and the output gear 312 and the synchronizer 313. Specifically, the synchronous coupling structure includes synchronous jacks 314 that are respectively and evenly distributed on the sides of the synchronizer 313, and synchronous plugs 315 and 316 for matching with the corresponding synchronous jacks 314 are respectively provided on the sides facing the input gear 311 and the output gear 312. The synchronous jack 314 of this embodiment adopts a waist-shaped circular hole with an arc whose axis is coaxial with the synchronizer 313, and the synchronous plugs 315 and 316 are both cylindrical plugs. Preferably, the synchronizer 313 of this embodiment is spline-matched with the input shaft 306. When the synchronizer 313 slides to one side of the input gear 311, the synchronization pin 315 provided on the input gear 311 is inserted into the synchronization socket 314, so that the input gear 311 rotates synchronously with the synchronizer 313, that is, the input gear 311 rotates synchronously with the input shaft 306. When the synchronizer 311 slides to one side of the output gear 312, the synchronization pin 316 provided on the output gear 312 is inserted into the synchronization socket 314, so that the output gear 312 rotates synchronously with the synchronizer 313. At this time, the spline between the synchronizer 313 and the input shaft 306 is still in a meshing state. Even if the output gear 312 rotates synchronously with the input shaft 306, the input gear 311 and the input shaft 306 are in a rotational matching state at this time, and will not interfere with the first gear 309 and the second gear 310.

[0039] Furthermore, the shift mechanism includes a shift cylinder 317, a shift plate 318 rotatably mounted on the speed increasing case 305, and a shift fork 319 for driving the synchronizer 313 to move. The cylinder body of the shift cylinder 317 is hingedly connected to the speed increasing case 305, the piston rod is hingedly connected to one end of the shift plate 318, and the shift fork 319 is hingedly connected to the other end of the shift plate 318. The piston rod of the shift cylinder 317 and the shift fork 319 are respectively located on both sides of the rotation axis of the shift plate 318. The shift plate 318 is driven to rotate by the shift cylinder 317, and then the shift fork 319 is driven to move and drive the synchronizer 313 to slide on the input shaft 306, so as to achieve the technical purpose of adjusting the position of the synchronizer 313 so that it engages with the input gear 311 or the output gear 312.

[0040] Furthermore, an electromagnetic reversing valve and a control circuit for controlling the action of the electromagnetic reversing valve are provided on the gas path of the shift cylinder 317 of the present embodiment. The control circuit is connected to the on-board computer, and the on-board computer is also connected to a speed sensor for detecting the rotational speed of the main shaft 102 and a clutch signal sensor for detecting the clutch state of the clutch device 2. The on-board computer collects the rotational speed data collected by the speed sensor and the clutch signal data collected by the clutch signal sensor in real time. When the clutch device 2 is in the engaged state and the rotational speed of the main shaft 102 is lower than the set threshold, the electromagnetic reversing valve is controlled by the control circuit to make the transmission ratio of the speed increaser 302 greater than 1, and the synchronizer 313 is meshed with the input gear 311 and rotates synchronously at this time. When the clutch device 2 is in the engaged state and the rotational speed of the main shaft 102 is not lower than the set threshold, the electromagnetic reversing valve is controlled by the control circuit to make the transmission ratio of the speed increaser 302 equal to 1, that is, the synchronizer 313 is meshed with the output gear 312 and rotates synchronously at this time.

[0041] Furthermore, the liquid vortex supercharged retarder of this embodiment further includes a fan device 6 for cooling the liquid medium in the liquid medium box 5; the fan device 6 includes a fan protection cover 601 fixed to the cooling box 5, a fan bracket 602 fixed to the vehicle, a fan shaft 603 in the bracket, and a fan blade 604 at one end of the fan shaft 603. The transmission device 3 also includes a gear transmission box, which includes a gear box body 301, and a first shaft 303 and a second shaft 304 are arranged in the gear box body 301. One end of the first shaft 303 is transmission-connected to the output shaft 307, and the other end is transmission-connected to the rotating shaft 401. The first shaft 303 and the second shaft 304 are transmission-connected, and the second shaft 304 is transmission-connected to the fan shaft 603 of the fan device 6.

[0042] Specifically, in actual use, the installation and connection method of the liquid eddy current vehicle retarder of this embodiment can be flexibly selected according to different vehicle models. When the vehicle chassis is an integrated chassis, the two ends of the main shaft 102 can be connected to the gearbox output shaft 7 and the rear axle drive shaft 8 respectively; when the vehicle chassis is divided into a tractor and a trailer, at this time at least one axle of the trailer can be set as a half-axle with a differential, and the main shaft 301 can be connected to the drive shaft of the differential to achieve braking of the differential drive shaft, thereby achieving braking of the entire vehicle body.

[0043] During the driving of the automobile, the gearbox output shaft 7 or the rear axle drive shaft 8 or the differential drive shaft can drive the main shaft 102 to rotate. Under normal conditions, there is no liquid medium in the hydraulic resistance retarder pump 1, and there is no liquid resistance state, and the automobile drives normally.

[0044] When the car needs to brake, the speed of the car is high, the rotation speed of the main shaft 102 is high, that is, the rotation speed of the rotating shaft 401 is high, and the high-pressure circulation pump can provide the liquid medium pressure that meets the braking requirements for the hydraulic resistance retarder pump 1. At this time, the transmission ratio of the speed increaser 302 is controlled to be equal to 1, the solenoid valve 9 and the flow control valve 10 are opened, and the clutch pneumatic valve 204 is opened, so that the main shaft 102, the clutch device 2 and the transmission device 3 form a power transmission state, and the main shaft 102 transmits power to drive the rotating shaft 401 of the high-pressure circulation pump 4 to operate, and the rotating shaft 401 drives the impeller in the high-pressure circulation pump 4 to rotate, so that the high-pressure circulation pump 4 operates, so that the liquid medium in the liquid medium tank 5 is transferred along the delivery pipeline to the hydraulic resistance retarder pump 1. Driven by the front pump wheel 101 and the rear pump wheel 102, the liquid medium circulates and impacts in the spiral vortex chamber, and the momentum moment changes, thereby generating a braking torque. The liquid medium goes out from the one-way valve 11 and returns to the liquid medium tank 5 through the flow control valve 10, forming a self-circulating liquid circulation system;

[0045] As the speed of the car decreases, the rotation speed of the main shaft 102 decreases accordingly, that is, the rotation speed of the rotating shaft 401 will also decrease. The high-pressure circulating pump cannot provide the liquid medium pressure that meets the braking requirements for the hydraulic resistance retarder pump 1. At this time, the transmission ratio of the speed increaser 302 is controlled to be greater than 1 to increase the rotation speed of the rotating shaft 401. The rotating shaft 401 drives the impeller in the high-pressure circulating pump 4 to rotate, so that the high-pressure circulating pump 4 can resume efficient operation to achieve the technical effect of low-speed braking.

[0046] The second shaft 304 of the transmission device 3 is connected to the fan shaft 603 of the fan device 6 through a belt transmission mechanism. The fan shaft 603 drives the fan blades 604 to rotate. A heat sink is provided on the liquid medium box 5. The fan device 6 can dissipate the heat of the heat sink, thereby forming a self-circulating heat dissipation system.

[0047] When the car does not need to brake, close the clutch pneumatic valve 204, so that the clutch device disconnects the power transmission state between the main shaft 102 and the transmission device 3, close the solenoid valve 9, disconnect the liquid circulation system, and the flow control valve 10 can be opened to the maximum flow state, so that the liquid medium in the liquid resistance retarder pump 1 flows into the liquid medium tank 5 through the one-way valve 11. At this time, there is no liquid medium in the liquid resistance retarder pump 1, and there is no liquid resistance state, and the car is running normally or stops.

[0048] The above-described embodiments are only preferred embodiments for fully illustrating the present invention, and the protection scope of the present invention is not limited thereto. Equivalent substitutions or changes made by those skilled in the art based on the present invention are within the protection scope of the present invention. The protection scope of the present invention shall be subject to the claims.

Claims

1. A liquid vortex booster retarder, comprising a liquid resistance retarder pump (1), a clutch device (2), a transmission device (3), a high-pressure circulation pump (4) and a liquid medium tank (5); the liquid resistance retarder pump (1) comprises a pump body (101), a main shaft (102) and a pump wheel on the main shaft (102); the pump body is provided with an inlet (105) and an outlet (106); the outlet (106) is connected to the liquid medium tank (5); the inlet (105) is connected to the liquid medium tank (5) through the high-pressure circulation pump (4); the main shaft (102) is connected to the clutch device (2) through a power universal shaft (12); the transmission device (3) is connected to the rotating shaft (401) of the high-pressure circulation pump (4); the characteristics are: The transmission device (3) comprises a speed increasing box (302), the speed increasing box (302) comprises a speed increasing box body (305), an input shaft (306) and an output shaft (307) are arranged in the speed increasing box body (305), the input shaft (306) is transmission-connected to the power universal shaft (12), the output shaft (307) is transmission-connected to the rotating shaft (401), a speed changing mechanism is arranged between the output shaft (307) and the input shaft (306), and the transmission ratio between the output shaft (307) and the input shaft (306) can be switched between equal to 1 and greater than 1; A gear speed change mechanism is provided between the input shaft (306) and the output shaft (307); the gear speed change mechanism comprises a double-toothed shaft (308), and the double-toothed shaft (308) is provided with a first gear (309) and a second gear (310) which rotate synchronously with the double-toothed shaft (308); the input shaft (306) and the output shaft (307) are coaxially arranged, and the input shaft (306) is provided with an input gear (311) which meshes with the first gear (309), and the output shaft (307) is provided with an output gear (312) which meshes with the second gear (310). A synchronizer (313) is provided between the input shaft (306) and the output shaft (307); a gear shift mechanism is provided on the speed increasing case (305) for driving the synchronizer (313) to move and to make the input shaft (306) and the output shaft (307) rotate synchronously or to make the input shaft (306) and the output shaft (307) rotate independently of each other; a transmission ratio between the input gear (311) and the first gear (309) is less than 1, and a transmission ratio between the second gear (310) and the output gear (312) is less than 1; The shift mechanism comprises a shift cylinder (317), a shift plate (318) rotatably mounted on the speed increasing housing (305), and a shift fork (319) for driving the synchronizer (313) to move. The cylinder body of the shift cylinder (317) is hingedly connected to the speed increasing housing (305), the piston rod is hingedly connected to one end of the shift plate (318), and the shift fork (319) is hingedly connected to the other end of the shift plate (318). An electromagnetic reversing valve and a control circuit for controlling the action of the electromagnetic reversing valve are provided on the gas path of the shift cylinder (317). The control circuit is connected to a driving computer. The driving computer is also connected to a device for detecting the rotation of the main shaft (1 02) a speed sensor for detecting the speed of the clutch device (2) and a clutch signal sensor for detecting the clutch state of the clutch device (2); the on-board computer collects the speed data collected by the speed sensor and the clutch signal data collected by the clutch signal sensor in real time; when the clutch device (2) is in the engaged state and the speed of the main shaft (102) is lower than the set threshold, the electromagnetic reversing valve is controlled by the control circuit to operate so that the transmission ratio of the speed increasing box (302) is greater than 1; when the clutch device (2) is in the engaged state and the speed of the main shaft (102) is not lower than the set threshold, the electromagnetic reversing valve is controlled by the control circuit to operate so that the transmission ratio of the speed increasing box (302) is equal to 1.

2. The liquid vortex boost retarder according to claim 1, characterized in that: The input gear (311) is rotatably fitted onto the input shaft (306), and the output gear (312) rotates synchronously with the output shaft (307); the synchronizer (313) is located between the input gear (311) and the output gear (312), and the synchronizer (313) and the input shaft (306) are slidably fitted with a single degree of freedom, and a synchronizing coupling structure is provided between the input gear (311) and the output gear (312) and the synchronizer (313), respectively.

3. The liquid vortex boost retarder according to claim 2, characterized in that: The synchronous combination structure comprises synchronous sockets (314) respectively and evenly arranged in an annular manner on the side surfaces of both sides of the synchronizer (313), and synchronous plug posts (315, 316) for cooperating with the corresponding synchronous sockets (314) are respectively provided on the sides of the input gear (311) and the output gear (312) facing each other.

4. The liquid vortex boost retarder according to claim 2, characterized in that: The synchronizer (313) and the input shaft (306) are spline-matched.

5. The liquid vortex boost retarder according to any one of claims 1 to 4, characterized in that: The transmission device (3) further comprises a fan device (6) for cooling the liquid medium in the liquid medium box (5); the transmission device (3) further comprises a gear transmission box, the gear transmission box comprising a gear box body (301), a first shaft (303) and a second shaft (304) being arranged in the gear box body (301), one end of the first shaft (303) being transmission-connected to the output shaft (307), and the other end of the first shaft (303) being transmission-connected to the rotating shaft (401), the first shaft (303) and the second shaft (304) being transmission-connected to each other, and the second shaft (304) being transmission-connected to a fan shaft (603) of the fan device (6).

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