CN2284301Y

CN2284301Y - Secondary balancing device of beam-pumping unit

Info

Publication number: CN2284301Y
Application number: CN 96247534
Authority: CN
Inventors: 曹洪霞; 李明宇
Original assignee: OIL RECOVERY TECHNOLOGY INST OF DAQING PETROLEUM ADMINISTRATION BUREAU
Current assignee: OIL RECOVERY TECHNOLOGY INST OF DAQING PETROLEUM ADMINISTRATION BUREAU
Priority date: 1996-12-03
Filing date: 1996-12-03
Publication date: 1998-06-17
Anticipated expiration: 2006-12-03

Abstract

The utility model relates to a secondary balancing device of a beam-pumping unit, belonging to an energy saving device of a pumping well for an oil field. In order to reduce two maximum values of the net torque of a crank shaft of the beam-pumping unit, and therefore, the power rating of a motor is lowered, the power consumption is saved, and the cost is reduced, the tail end of the beam-pumping unit is fixedly connected with a steel cable hanger, the back side of a walking beam of the beam-pumping unit and the upper part of a reduction box are respectively welded with a bracket, a bearing is fixed with top boards of the brackets, and a steel cable passes through a pulley to be hung with a balance weight. The utility model is mainly used in a conventional oil pumping well. The utility model has the advantages of simple structure, high motor efficiency, power consumption saving, long service life, etc.

Description

Pumping unit secondary balancing device

The utility model belongs to the oil-field oil pumper energy saving device.

At present, low this problem of, efficient big at the pumping well energy consumption has had several different methods to improve, and pumping well energy compensating device is exactly a kind of device of doing the primary energy compensation when the pumping unit upstroke.Pumping well energy compensating device as shown in Figure 3 is made up of base 15, lower shaft 14, connecting rod base 13, spring 12, working barrel 11, connecting rod 10, axle 9, axle bed 8 etc.

Spring 12 is up under the effect of sucker rod, horse head and motor with walking beam, and at this moment the spring 12 in the working barrel 11 is compressed stored energy, during upstroke, the beam rating maximum, spring 12 releases energy, help motor to draw the afterbody acting of walking beam, play purpose of energy saving.

The deficiency of this device is to reduce the maximum torque of pumping unit crankshaft when down stroke is worked, and also just can not reduce the rated power of motor.And the size of elastic force is difficult for regulating, spring cost height, and the life-span is short.

The purpose of this utility model is to reduce by two maximum values of the clean moment of torsion of oil pumping machine crank axle, thereby reduces the rated power of motor, energy efficient.

Pumping unit secondary balancing device is made up of wire rope extension, wire rope, pulley, axle, bearing, balancer weight and support etc.Wire rope is hung and is fixedlyed connected with the pumping unit beam travelling tail end, at weldering one support behind the walking beam, above the speed reducer, pulley is connected the location with axle by common key, bearing and rack plate are fixed, the height of pulley is identical at the height of horizontal position with the pumping unit walking beam, wire rope from pulley by and hang with balancer weight.

Wherein, the oblate cylindricality that the center that is shaped as of balancer weight is porose, balancer weight is hung by the steel pipe string of band suspension ring, and the lower end is pallet and double nut, and the equilibrium block of balancer weight is seated on the pallet, and balancer weight is made by reinforced concrete.

Compared with the prior art pumping unit secondary balancing device has the following advantages: 1. this device can improve efficiency of motor, energy efficient.2. this apparatus structure is simple, and the adjustable size of balancer weight, long service life.

Drawing of the present utility model is described as follows: Fig. 1: pumping unit secondary balancing apparatus structure sketch; Fig. 2: pumping unit secondary balancing device fundamental diagram; Fig. 3: former pumping well energy compensating device structure diagram.

The utility model is described in further detail below in conjunction with accompanying drawing:

As Fig. 1, pumping unit secondary balancing device is made up of wire rope extension 1, wire rope 2, pulley 3, axle 4, bearing 5, balancer weight 6 and support 7 etc.Shown in Figure 2, balancer weight 6 under the traction of wire rope 2 with pulley 3 serve as the guiding and fulcrum, when upstroke, balancer weight 6 is along with beam travelling tail end is descending by the gravitational potential energy acting, when walking beam after horizontal position because the height of pulley 3 is identical at the height of horizontal position with walking beam, balancer weight 6 is a fulcrum with pulley 3, carry storage of potential energy on the descending of beam travelling tail end.When down stroke, balancer weight 6 is done work by gravitational potential energy with the up elder generation of beam travelling tail end, at walking beam to more than the horizontal position, balancer weight 6 is again with its stored energy, thereby realizes the motion of twice of balance in the up-down stroke process, and the vibration of pumping unit and impulsive load are tended to be steady, reduced the rated power of motor, efficient is improved, energy efficient, and the individual well amount of electricity saving is greater than 20%.Because balancer weight 6 is to wear extension by the steel pipe of band suspension ring, fastening by pallet and double nut below, equilibrium block is sitting on the pallet, this structure can be in fact, the adjusting of existing balancer weight 6, can be equipped with the balancer weight of the optimum state to different hole conditions, and equilibrium block is made the oblate cylindricality that the center that is shaped as is porose by reinforced concrete, low cost of manufacture, long service life.

Claims

1. pumping unit secondary balancing device, it is characterized in that this device is by wire rope extension (1), wire rope (2), pulley (3), axle (4), bearing (5), balancer weight (6) and support compositions such as (7), wire rope extension (1) is fixedlyed connected with the pumping unit beam travelling tail end, behind walking beam, speed reducer top weldering one support (7), pulley (3) is connected the location with axle (4) by common key, bearing (5) is fixedlyed connected with support (7) top board, the height of pulley (3) is identical at the height of horizontal position with the pumping unit walking beam, wire rope (2) from pulley (3) by and hang with balancer weight (6).

2. pumping unit secondary balancing device according to claim 1, its feature also is the oblate cylindricality that the center that is shaped as of balancer weight (6) is porose, balancer weight (6) is hung by the steel pipe string of band suspension ring, and the lower end is pallet and double nut, and the equilibrium block of balancer weight (6) is seated on the pallet.

3. pumping unit secondary balancing device according to claim 2, its feature are that also balancer weight (6) made by reinforced concrete.