CN203768887U - Ball screw drilling platform lifting mechanism - Google Patents

Abstract

The utility model relates to offshore oil equipment, in particular to a ball screw type drilling platform lifting mechanism. The ball screw type drilling platform lifting mechanism is characterized in that it includes a platform base, a transmission chain, a pinion, a leg, a screw nut, a screw, a driven sprocket, a driving sprocket, a leg bearing, a driving bevel gear, a motor , transmission shaft, driven bevel gear, coupling, the lower ends of the legs are inserted into the platform base, and leg bearings are arranged between them to ensure the stable rotation of the legs. The thread is matched with the lead screw nut, and there is a ball between the two. The lead screw nut is fixed in the hole opened by the platform through the screw. The driven sprocket is engaged. The utility model has the beneficial effects of simple structure, reduced volume, stable and reliable transmission, greatly improved transmission ratio, reduced volume of the transmission system, simple control system and low cost.

Description

Ball screw type drilling platform lifting mechanism

technical field

The utility model relates to an ocean platform equipment, in particular to a ball screw type drilling platform lifting mechanism.

Background technique

With the deepening of human development and utilization of oil and gas resources, oil and gas exploration and development have shifted from land to sea. Therefore, drilling engineering operations must also be carried out in the vast ocean. When carrying out oil and gas drilling construction at sea, the drilling rig weighing hundreds of tons must have enough support and space, and at the same time, there must be a place for the drilling personnel to live and live. Offshore oil drilling platforms have taken on this important task. Due to the changeable offshore climate, the damage of offshore wind waves and undercurrents, the stability and safety of offshore drilling devices are more important.

The most common rack and pinion type and jacking hydraulic cylinder type of platform lifting device. The rack and pinion type can realize continuous lifting, fast speed and flexible operation, but it needs a complex and huge deceleration mechanism, which is very large. After the platform is lifted, it is fixed with brakes. The requirements are higher and the safety performance is lower. The hydraulic lifting mechanism does not require a complicated speed change mechanism. It is small in size, high in transmission efficiency, and relatively flexible in control, but it cannot be continuously lifted, the speed is slow, and the operation is troublesome. It has high requirements for hydraulic oil and hydraulic valve parts, and the safety performance of hydraulic equipment is high. Low, high requirements for technical personnel.

Utility model content

The purpose of this utility model is to provide a ball screw type drilling platform lifting mechanism for the current situation, which overcomes the shortcomings of the current drilling platform lifting mechanism, such as complex and large, unstable lifting, large volume, discontinuous process, and low safety factor. The technical scheme adopted is as follows:

The ball screw type drilling platform lifting mechanism is characterized in that it includes a platform base, a transmission chain, a pinion, a leg, a screw nut, a screw, a driven sprocket, a driving sprocket, a leg bearing, a driving bevel gear, a motor , transmission shaft, driven bevel gear, coupling, the lower ends of the legs are inserted into the platform base, and leg bearings are arranged between them to ensure the stable rotation of the legs. The thread is matched with the lead screw nut, and there is a ball between the two. The lead screw nut is fixed in the hole opened by the platform through the screw, and the driven sprocket is fixed at the lower end of the leg without thread through a key connection. The transmission chain and The four driven sprockets are synchronously meshed to ensure the same speed of the four driven sprockets.

The above-mentioned ball screw type drilling platform lifting mechanism is characterized in that: the transmission system mainly includes a motor, a shaft coupling, a driving bevel gear, a driven bevel gear, a transmission shaft, a driving sprocket, and a driven sprocket, and the coupling The motor transmits the torque of the motor to the driving bevel gear, the driving bevel gear meshes with the driven bevel gear installed on the transmission shaft, the driving sprocket is fixed on the transmission shaft through a key connection, and the driving sprocket meshes with the driven sprocket transmission.

The utility model has the following advantages: the use of ball screw transmission can greatly improve the transmission ratio, reduce the volume of the transmission system, and the structure is simple; the use of chain transmission and bevel gear transmission, four driven sprockets synchronous transmission, platform lifting process Stable and reliable; the mechanical transmission control system is simple, saving the cost of the control system.

Description of drawings

Figure 1: Schematic diagram of the utility model;

Figure 2: Schematic diagram of the transmission system of the present utility model.

Symbol Description

1. Platform base, 2. Drive chain, 3. Leg, 4. Platform, 5. Screw nut, 6. Screw, 7. Driven sprocket, 8. Driving sprocket, 9. Leg bearing, 10. Driving bevel gear, 11. Motor, 12. Transmission shaft, 13. Driven bevel gear, 14. Coupling.

Detailed ways

Below in conjunction with accompanying drawing and example the utility model is described further:

As shown in Fig. 1 and Fig. 2, the lifting mechanism of the ball screw type drilling platform of the utility model includes a platform base 1, a transmission chain 2, pile legs 3, a platform 4, a screw nut 5, a screw 6, and a driven sprocket 7 , driving sprocket 8, leg bearing 9, driving bevel gear 10, motor 11, transmission shaft 12, driven bevel gear 13, coupling 14, the lower end of the leg 3 is inserted in the platform base 1, between Leg bearings 9 are provided to ensure the stable rotation of the legs 3. There are four evenly distributed threads on the legs 3 to cooperate with the lead screw nut 5. Balls are arranged between the two, and the lead screw nut 5 is fixed by screws 6. Knotted in the hole of the platform 4, the driven sprocket 7 is fixed on the lower end of the leg 3 without thread through a key connection, and the transmission chain 2 is synchronously meshed with the four driven sprockets 7 to ensure that the four driven chains The speed of wheel 7 is consistent.

Preferred transmission system mainly comprises motor 11, shaft coupling 14, driving bevel gear 10, driven bevel gear 13, transmission shaft 12, driving sprocket 8, driven sprocket 7, and described shaft coupling 14 connects motor 11 The torque is transmitted to the driving bevel gear 10, the driving bevel gear 10 is meshed with the driven bevel gear 13 mounted on the transmission shaft 12, the driving sprocket 8 is fixed on the transmission shaft 12 through a key connection, and the driving sprocket 8 and the driven Sprocket 7 meshes transmission.

During the lifting process of the platform, turn on the power supply of the motor, the motor 11 is rotating, the driving bevel gear 10 is driven to rotate through the coupling 14, and the driven bevel gear 13 is driven through meshing cooperation, and the driven bevel gear 13 transmits the torque through the transmission shaft 12 For the driving sprocket 8, the driving sprocket 8 drives the driven sprocket 7 to rotate through engagement, and the driven sprocket 7 drives the transmission chain 2 to drive through the engagement, and the transmission chain 2 drives the other three driven sprockets 7 to rotate. The moving sprocket 7 transmits the torque to the leg 3 through the key connection, and through the transmission of the ball screw mechanism, the rotational motion of the leg 3 is changed into the linear motion of the lead screw nut 5, thereby driving the upward movement of the platform 4; when the platform When lowering, the electrode 11 is reversed, and the working process is reversed.

Claims (2)

1. a ball screw type drilling platform lifting mechanism, it is characterized in that: comprise platform base (1), driving chain (2), spud leg (3), platform (4), feed screw nut (5), screw (6), driven sprocket (7), drive sprocket (8), spud leg bearing (9), drive bevel gear (10), motor (11), power transmission shaft (12), driven wheel of differential (13), shaft coupling (14), described spud leg (3) lower end is plugged in platform base (1), between be provided with spud leg bearing (9), ensure the stable rotation of described spud leg (3), on spud leg (3), there is equally distributed screw thread everywhere to coordinate with feed screw nut (5), be provided with ball between the two, feed screw nut (5) is cemented in the hole that platform (4) opens by screw (6), driven sprocket (7) is fastened on spud leg (3) lower end by key and is not provided with screw thread place, driving chain (2) and four driven sprockets (7) synchro-meshing transmission, ensure that four driven sprockets (7) speed is consistent.

2. ball screw type drilling platform lifting according to claim 1 mechanism, it is characterized in that: transmission system mainly comprises motor (11), shaft coupling (14), drive bevel gear (10), driven wheel of differential (13), power transmission shaft (12), drive sprocket (8), driven sprocket (7), the moment of torsion of motor (11) is passed to drive bevel gear (10) by described shaft coupling (14), drive bevel gear (10) be arranged on driven wheel of differential (13) engaged transmission on power transmission shaft (12), drive sprocket (8) is connected and is fixed on power transmission shaft (12) by key, drive sprocket (8) and driven sprocket (7) engaged transmission.