Speed reduction box for turbine fracturing

[0025] Such as Figure 1 to 6 As shown, a reduction gearbox for turbine fracturing, the reduction gearbox includes a sun gear shaft 2, a planetary gear 11 and a bearing 13, the planetary gear 11 is three, the bearing 13 is six, the bearing 13 is two by two. The set is used to fix a planetary gear 11, 6 bearings 13 and 3 planetary gears 11 are respectively sleeved to form 3 sets of planetary gears. The sun gear shaft 2 includes a big end gear and a small end gear. The big end gear is distributed around the center of the circle, and the planetary gear 11 meshes with the big end gear. The three planetary gear sets are evenly distributed around them with the big end gear as the center. The gearbox has a large transmission ratio, and the power is input from the small end gear of the sun gear shaft, and the large end gear of the sun gear shaft meshes with the planet gear 11 to reduce speed and increase torque, and output through the planet carrier 9. The use of the structure of the planetary gear set to reduce the size and number of gears is more suitable for the deceleration requirements of the turbine engine. The big end gear includes a first big end gear 16 and a second big end gear 17, the first big end gear 16 is a right-handed helical tooth, and the second big end gear 17 is a left-handed helical tooth. The planetary gear 11 includes a first gear tooth surface 18 and a second gear tooth surface 19. The first gear tooth surface 18 is a left-handed helical tooth, and the second gear tooth surface 19 is a right-handed helical tooth. The first big end gear 16 meshes with the first gear tooth surface 18, and the second big end gear 17 meshes with the second gear tooth surface 19, so that the planetary gear 11 and the sun gear are meshed with double-row herringbone gears. The structure increases the contact area and reduces the vertical pressure on the gear, which is conducive to the flow of lubricating oil, eliminates the lateral force on the helical gear shaft, makes the gears high coincidence, small axial load, high load capacity, and more stable work . The reduction box includes an input bearing 14, a flange 3, an inner gear ring 10, and a planet carrier 9. The flange 3 is connected to the inner gear ring 10, and the flange 3 is provided with an input bearing 14 and the input bearing 14 It is sleeved on the sun gear shaft 2, the inner ring gear 10 is meshed and connected with the planet wheels 11 of the planetary gear set, and the planet carrier 9 is connected with the bearing 13 through the pin shaft 12. The reduction gearbox includes an output spline shaft 8 and an output spline sleeve 7. One end of the output spline shaft 8 is connected with the output spline sleeve 7, and the other end of the output spline shaft 8 is connected with the planet carrier 9. The reduction box includes an upper box body 4, a lower box body 1 and an output bearing 15. The upper box body 4 and the lower box body 1 are connected to form a protective box body outside the reduction box. 3 connection, connected to the output spline shaft 8 through the output bearing 15 on the other side of the protective box. The overall structure of the gearbox is compact, small in size and light in weight.

[0026] The upper box body 4 is provided with an observation hole, and the observation hole is covered with a cover plate 5. Open the cover plate 5 through the observation hole to see the internal operation in the protective box, such as gear meshing, tooth surface wear, etc., without opening the protective box, it can play a role in convenient maintenance.

[0027] The upper box 4 is provided with a brake device 6 and the output spline sleeve 7 is provided with a brake pad 20. The brake device 6 is used in conjunction with the brake pad 20 to immediately stop the equipment in case of emergency to protect Equipment and personal safety.

[0028] In actual use, the small end gear of the sun gear shaft 2 can be connected to the turbine engine, the output spline sleeve 7 is connected to the drive shaft, and the turbine engine speed is transmitted to the drive shaft through a reduction box for turbine fracturing, so as to achieve The function of reducing the speed and increasing the output torque.

[0029] Those skilled in the industry should understand that the present invention is not limited by the foregoing embodiments. The foregoing embodiments and descriptions only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have Various changes and improvements, these changes and improvements fall within the scope of the claimed invention. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.