CN202612486U - Fracturing pump driving device for planetary reduction box - Google Patents

Abstract

The utility model discloses a driving device for a fracturing pump with a planetary reduction box, which comprises a small gear and a large gear meshed and connected in a first-stage gear transmission box. The mandrel of the large gear is coaxially connected with the sun gear, and the sun gear At the same time, it is engaged with three planetary gears, and the three planetary gears are also engaged with the ring gear of the planetary gear transmission box. The three planetary gears are installed in the planetary carrier at the same time, and the output end of the crankshaft of the planetary carrier is coaxial with the core shaft. Set, the output end of the crankshaft of the planet carrier is connected with the input shaft of the fracturing pump through transmission. The device of the utility model has the advantages of compact structure, different gear sizes, small outline size, light weight, and large transmission torque.

Description

A planetary gearbox fracturing pump driving device

technical field

The utility model belongs to the technical field of petroleum, coal bed gas and shale gas equipment, and relates to a driving device for a fracturing pump of a planetary reduction box.

Background technique

At present, the driving device of the fracturing pump is usually a first-stage gear transmission box composed of two gears, one big and one small. The engine drives the pinion gear, and the pinion gear transmits power to the input shaft of the fracturing pump through external meshing with the large gear to drive the fracturing pump to work. Due to the large transmission ratio and transmission power, the size of the two wheels is very different, the outer dimensions are large, the weight is heavy, and the load-carrying capacity is high; at the same time, the pinion wears a lot and has a short life.

Contents of the invention

The purpose of this utility model is to provide a planetary reduction box fracturing pump driving device, which solves the problem in the prior art that the fracturing pump is driven by a first-stage gear transmission box, resulting in a huge difference in the size of the two wheels and a large outer dimension. Heavy weight, high load capacity requirements, large pinion wear, and short service life.

The technical scheme adopted by the utility model is that a planetary reduction box fracturing pump driving device includes a small gear and a large gear meshed and connected in the first-stage gear transmission box, and the mandrel of the large gear is the same as the sun gear. Shaft connection, the sun gear is meshed with three planetary gears at the same time, and the three planetary gears are also meshed with the ring gear of the planetary gear transmission box. It is arranged coaxially with the mandrel, and the output end of the crankshaft of the planet carrier is connected with the input shaft of the fracturing pump through transmission.

The beneficial effect of the utility model is that the driving device has a compact structure, gears with different dimensions, small outer dimensions, heavy weight and large bearing capacity; at the same time, the wear of the pinion is small and the service life is long.

Description of drawings

Fig. 1 is a schematic diagram of the transmission principle of the primary gear drive device of the existing fracturing pump;

Fig. 2 is a schematic diagram of the transmission principle of the planetary reduction box fracturing pump driving device of the present invention.

In the figure, 1. small gear, 2. large gear, 3. mandrel, 4. inner ring gear, 5. planetary gear, 6. sun gear, 7. planetary carrier, 8. primary gear transmission box, 9. planet wheel gearbox.

Detailed ways

The utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

Fig. 1 is a schematic diagram of the principle of the existing primary gear drive device of the fracturing pump. The power is input from the pinion 1 of the primary gear transmission box 8, and then output to the input shaft of the fracturing pump after being decelerated by the large gear 2 to drive the fracturing pump to work.

Fig. 2 is a schematic diagram of the transmission principle of the planetary reduction box fracturing pump driving device of the present invention. Its structure is as follows: a small gear 1 and a large gear 2 meshed and connected in the first-stage gear transmission box 8, and the mandrel 3 of the large gear 2 (output end) is coaxially connected with the sun gear 6, and the sun gear 6 is meshed with three planetary gears 5 at the same time, and the three planetary gears 5 are also meshed with the ring gear 4 of the planetary gear transmission box 9, and the ring gear 4 As a fixed wheel, the three planetary gears 5 are installed in the planetary carrier 7 at the same time, the crankshaft output end of the planetary carrier 7 is arranged coaxially with the core shaft 3, and the crankshaft output end of the planetary carrier 7 is connected with the input shaft of the fracturing pump.

The planetary gear box 9 is provided with a planetary carrier 7, and the planetary carrier 7 is provided with three planetary gears 5, and the three planetary gears 5 are evenly distributed around the inner ring gear 4 and the sun gear 6, and rotate with the planetary carrier 7. The pair is connected, wherein the inner ring gear 4 is a fixed wheel, the sun gear 4 is connected with the bull gear 2 of the first-stage gear transmission box 8 through the mandrel 3; the pinion 1 and the bull gear 2 are externally meshed to transmit power.

The planetary gears 5 are evenly distributed inside the inner ring gear 4 and around the sun gear 6, and there may be more than three planetary gear structures.

The structure of the present utility model is made up of one-stage gear transmission box 8 and planetary gear transmission box 9. When working, the pinion 1 is connected to the engine externally, connected to the power, and externally meshes with the large gear 2. The large gear 2 is connected with the sun gear 6 through the mandrel 3, so that the power is transmitted to the sun gear 6, and the sun gear 6 is driven by the external mesh. There are three planetary gears 5, and the three planetary gears 5 are internally meshed with the ring gear 4 at the same time. Since the three planetary gears 5 are connected with the planetary carrier 7 through the rotary pair, and the ring gear 4 is fixed, the three planetary gears 5 rotate around their own axis on one side, and drive the planetary carrier 7 to rotate on the other hand. The planet carrier 7 then outputs the power to the input shaft of the fracturing pump to drive the fracturing pump to work.

The planetary reduction box fracturing pump driving device of the utility model is provided with a planetary gear transmission box and a first-stage gear transmission box at the input shaft of the fracturing pump. The planetary gear transmission box is equipped with a planetary carrier, and three planetary gears are arranged in the planetary carrier, and the three planetary gears are evenly distributed around the inner ring gear and the sun gear; the primary gear transmission box is equipped with a small gear and a large gear; The ring and the sun gear are connected through the mandrel.

Claims (3)

1. a planetary reduction box fracturing pump drive unit is included in the small gear (1) and the gearwheel (2) that are connected with a joggle in the one-level gear (8), it is characterized in that:

The mandrel (3) of described gearwheel (2) and coaxial connection of sun gear (6); Sun gear (6) is connected with a joggle with three planet wheels (5) simultaneously; These three planet wheels (5) also are connected with a joggle with the ring gear (4) of planet wheel transmission case (9); These three planet wheels (5) are installed in the planet carrier (7) simultaneously, and the crankshaft output end of planet carrier (7) is in transmission connection with the coaxial setting of mandrel (3), the crankshaft output end and the fracturing pump input shaft of planet carrier (7).

2. planetary reduction box fracturing pump drive unit according to claim 1 is characterized in that: described planet wheel (5) comprises the quantity more than three or three, and be evenly distributed in ring gear (4) inside and sun gear (6) around.

3. planetary reduction box fracturing pump drive unit according to claim 1 is characterized in that: described ring gear (4) is a fast pulley.

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