Brake braking device of beam pumping unit

Abstract

The invention relates to a brake braking device of a beam pumping unit. The device is characterized in that the upper end of a vertical pull rod of a transmission mechanism is connected with a brake mechanism, the brake mechanism comprises a gear disc, a brake pressing plate and brake teeth, the gear disc is fixedly connected with a brake wheel or a brake hub, an arc guide rail is arranged in themiddle of the brake pressing plate, the brake teeth are in clearance fit with the arc guide rail in the middle of the brake pressing plate to form an inclined suspension type structure, the brake teeth slide up and down along the arc guide rail and swing left and right along the central radioactive ray thereof to form a stable engagement mechanism of the brake teeth and the gear disc, the front ends of the brake teeth are provided with tooth centers matched with the tooth shape of the gear disc, the two sides of the brake teeth are connected with return springs in a suspension mode, the frontend of the brake pressing plate is in pin connection with the upper end of the vertical pull rod, and the tail end of the brake pressing plate is hinged with the brake mechanism of the pumping unit. The brake braking device of the beam pumping unit has the beneficial effect that when the pumping unit stops working, the brake braking device can realize firm locking and smooth opening regardless ofthe position of a crank of the pumping unit.

Description

technical field [0001] The invention belongs to the field of oil production equipment, and in particular relates to a braking device for a beam pumping unit. Background technique [0002] Beam pumping unit is the type of pumping unit widely used in domestic oilfields at present. In order to realize the operational performance of the pumping unit, a brake is installed on the high-speed shaft of the pumping unit reducer. The brakes currently used have two different types: externally embracing and internally expanding, which are respectively braked by the friction between the brake shoe and the brake wheel or the brake shoe and the brake hub. In order to prevent slipping and rolling, the original brake part is provided with a safety device. The external brake insurance is locked by tightening the lock nut of the brake shoe (see Figure 6 ). When this method is used, the operator is in a dangerous position between the square box of the pumping unit and the rotation radius of t...

AI Technical Summary

Problems solved by technology

After the dovetail-shaped hook is locked with the dovetail groove during use, the brake safety lock is firm, safe and reliable. The hook hangs into the dovetail groove; when the original brake fails, a large braking force is applied between the safety hook and the dovetail groove, and it is difficult to open the safety hook when unlocking

Because the positioning disc is often deformed during the installation process with the brake hub, resulting in the joint deformation of the toothed disc and the positioning disc, the rotation of the gear disc is blocked, and it is difficult to lock the brake pair; or the assembly gap between the positioning disc and the gear disc is too large , when the chainring assembly rotates with the brake wheel or the brake hub, abnormal noise occurs; the tooth tips of the tooth disc and the brake tooth adopt acute angle meshing, and the tooth tips are flattened during use, which is easy to form tooth tip to tooth tip , the phenomenon of not being able to mesh occurs

The above defects lead to the problem that the brake pair cannot engage when the tip-to-tooth phenomenon occurs during the locking process of the brake pair, which affects the brake insurance.

[0003] To sum up, the two types of brake insurance of beam pumping units currently used in oilfields have different degrees of potential safety hazards

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