CN102817587B - Direct drive motor pumping unit - Google Patents

Abstract

A direct-drive motor pumping unit consisting of a permanent magnet motor, sleeve spline coupling, roller assembly, guide wheel assembly, flexible connection mechanism, truss assembly, counterweight box assembly, and electric hoist, with flexible connection One end of the mechanism bypasses the roller assembly and the guide wheel assembly is connected to the rope hanger, and the other end is connected to the counterweight box assembly; its main features are: the permanent magnet motor is suspended installation, and the permanent magnet motor and roller assembly are fixed by bolts On the truss assembly, the two are directly connected by a sleeve spline coupling; the guide wheel assembly is fixed on the front side of the upper part of the truss assembly by bolts. The counterweight box assembly is located inside the truss assembly, and its center of gravity coincides with the center of the truss assembly. The electric hoist is fixed on the top of the truss assembly by bolts. The beneficial effect of the present invention is that the reduction box and the reversing mechanism are omitted, and the permanent magnet motor directly drives the roller assembly to carry out the oil extraction operation, the overall structure is compact, and a long stroke is realized; the weight is light, the floor space is small, and the maintenance is convenient; high efficiency and energy saving .

Description

Direct drive motor pumping unit

technical field

The invention is a novel oil extraction mechanical device used in oil extraction in oil fields, and belongs to the field of petroleum machinery technology research.

Background technique

Mechanical oil extraction is the main means of oil extraction in oilfields, among which the beam pumping unit is dominant. At present, CNPC is using 121,610 conventional beam pumping units. The working principle of the beam pumping unit is that the motor is decelerated by the V-belt After the gearbox is decelerated, the four-bar linkage mechanism changes the rotary motion of the output shaft of the reduction box into the reciprocating motion of the donkey head of the beam. The motion is transmitted to the plunger in the downhole oil well pump to make it work to pump oil. However, due to the unreasonable structure, high energy consumption, and low power factor of the beam pumping unit, the average efficiency of the system is only 24%, the cost of oil production is high, and the energy consumption has reached 70 billion yuan; in order to reduce costs and improve efficiency , various countries have made a series of attempts to improve the beam pumping unit and develop beamless pumping units, but the out-of-phase pumping units developed have not yet solved the problem of “big horse-drawn and small carts”, and the energy-saving effect Not significant; various types of beamless long-stroke pumping units have been developed at home and abroad, but these pumping units have both advantages and disadvantages and need further research and improvement.

In addition, with the continuous development of oilfields, oil extraction conditions have become increasingly complex, and the oil extraction process has put forward new requirements for rod pumping equipment such as long strokes, low strokes, and deep pumping with large pumps. In terms of applicability, it can no longer meet the requirements of oil recovery technology.

Contents of the invention

In order to further improve the efficiency of mechanical oil recovery, save electric energy, meet the production needs of special oil reservoir blocks such as long stroke, low stroke frequency, large pump deep pumping, etc., and promote the development of my country's oil production equipment industry, a new type of pumping unit was invented-direct pumping unit Drive motor pumping unit. The direct drive motor pumping unit adopts a simplified design concept, has the advantages of simple structure, superior performance, safety and stability, low maintenance cost, high efficiency and energy saving, and is suitable for popularization and use in oil fields.

The technical solution adopted by the present invention to solve the proposed problem is: the direct drive motor pumping unit is composed of a permanent magnet motor, a sleeve spline coupling, a roller assembly, a guide wheel assembly, a flexible connection mechanism, a truss assembly, Composed of counterweight box assembly and electric hoist, the permanent magnet motor and roller assembly are located on the top of the truss assembly, the guide wheel assembly is located on the upper front side of the truss assembly, the flexible connection mechanism bypasses the roller assembly and one end of the guide wheel assembly The other end is connected with the counterweight box assembly; its main features are: the permanent magnet motor is suspended installation, the permanent magnet motor, roller assembly, and guide wheel assembly are all fixed by bolts, the permanent magnet motor and roller assembly The two are directly connected through a sleeve spline coupling. The guide wheel assembly is composed of guide wheel assembly welding and bearing housing assembly. The guide wheel assembly welding is an integral structure welded by shaft, wheel and rib plate. The counterweight box assembly is located inside the truss assembly. The center of gravity coincides with the center of the truss assembly, and the electric hoist is fixed on the inner top of the truss assembly through bolt connection.

The beneficial effect of the present invention is that the reduction box and the reversing mechanism are omitted, the permanent magnet motor directly drives the roller assembly to carry out the oil extraction operation, and the permanent magnet motor itself realizes forward and reverse rotation. The overall structure of the invention is compact, realizing long stroke and light weight , small footprint, easy maintenance; high efficiency and energy saving.

Description of drawings

Fig. 1 is the front view of the present invention, has shown the overall structure of direct-drive motor pumping unit and the installation position and connection relation of each component.

Fig. 2 is a side view of the present invention, showing the overall structure of the direct drive motor pumping unit and the installation position and connection relationship of each component from another angle.

Fig. 3 is a top view of the present invention, which clearly shows the top structure of the direct-drive motor pumping unit and the position and connection relationship of each component, and shows the shape of the direct-drive motor pumping unit in the length and width directions.

Fig. 4 is a front view of the guide wheel assembly, which clearly shows the structural composition of the guide wheel assembly.

Fig. 5 is an isometric view of the present invention, which more intuitively shows the overall structural relationship of the direct drive motor pumping unit.

In the figure, 1. guide wheel assembly, 2. flexible connection mechanism, 3. roller assembly, 4. permanent magnet motor, 5. electric hoist, 6. truss assembly, 7. counterweight box assembly, 8. set Barrel spline coupling.

Detailed ways

The structure and implementation mode of the present invention will be further explained below in conjunction with the accompanying drawings.

As can be seen in Figure 1, the truss assembly (6) is the main support structure of the direct drive motor pumping unit, the truss assembly (6) is welded by different types of angle steel and I-beam, and the guide wheel assembly ( 1) Installed on the front side of the upper part of the truss assembly by bolts to allow a certain workover space, the roller assembly (3) is installed on the front side of the top of the truss by bolts; the flexible connection mechanism (2) bypasses the roller assembly One end of the assembly (3) and the guide wheel assembly (1) is connected with the rope hanger, the other end is connected with the counterweight box assembly (7), and the bag formed between the flexible connection mechanism (2) and the roller assembly (3) The angle ensures sufficient friction to meet the requirements of oil production operations. The flexible connection mechanism (2) is composed of belts, rope ends, connectors, screw screws, and elevators; the counterweight box assembly (7) is placed on the truss assembly (6) Inside, it moves up and down along the guide rail above the truss assembly (6); the electric hoist (5) is fixedly installed on the inner top of the truss assembly to lift the counterweight box assembly (7) and other necessary components.

It can be seen from Fig. 2 and Fig. 3 that the permanent magnet motor (4) is fixedly installed on the top of the truss assembly, and is fixed and suspended on the end face; the permanent magnet motor (4) is connected to the The roller assembly (3) is directly connected; the installation position of the roller assembly (3) is closer to the front side to ensure that the center of gravity of the counterweight box assembly (7) coincides with the center of the truss assembly (6). As can be seen in Fig. 4, the guide wheel assembly (1) is made of the guide wheel assembly welding and the bearing housing assembly, and the guide wheel assembly welding is an integral structure formed by welding the shaft, the wheel and the rib plate. The overall structure of the direct drive motor pumping unit can be seen intuitively in Figure 5.

Claims (1)

1. a pumping unit of direct-driven motor, comprising: magneto, sleeve spline shaft coupling, roller assembly, guide wheel assembly, flexible linking device, truss assembly, ballast box assembly, electric block, is characterized in that:

Truss assembly is the main body supporting structure of pumping unit of direct-driven motor, and truss assembly is welded by the angle steel of different model and i iron;

Guide wheel assembly is positioned on front side of truss assembly top, to abdicate certain well workover space; Guide wheel assembly is made up of guide wheel assembly welding and bearing support assembly, the overall structure that guide wheel assembly welding is axle, wheel, gusset are welded;

Roller assembly is positioned at truss assembly top;

Magneto is positioned at truss assembly top, fixes suspension type connect for end face;

Magneto, roller assembly, guide wheel assembly are all bolted fixing, and magneto is directly connected by sleeve spline shaft coupling between the two with roller assembly;

Flexible linking device walks around that roller assembly is connected with polished rod eye with one end after guide wheel assembly, the other end is connected with ballast box assembly, the cornerite formed between flexible linking device and roller assembly ensures to produce enough frictional force to meet oil producing operation requirement, and flexible linking device is made up of belt, fag end, connector, leading screw, elevator;

It is inner that ballast box assembly is positioned at truss assembly, moves up and down along the guide rail above truss assembly; The center of gravity of ballast box assembly and the center superposition of truss assembly;

Electric block is bolted and is fixed on truss assembly inner tip.