CN2315334Y

CN2315334Y - Elastic damper of oil pump

Info

Publication number: CN2315334Y
Application number: CN 97205043
Authority: CN
Inventors: 程坤; 周立波; 程万逵
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-01-08
Filing date: 1997-01-08
Publication date: 1999-04-21
Anticipated expiration: 2007-01-08

Abstract

The utility model relates to an elastic damper of the oil pumping machine, comprising an upper base seat, a lower base seat and rubber springs which are arranged in the upper base seat and the lower base seat. The utility model is characterized in that the lower base seat forms a cylinder shape; the upper base seat is similar to a piston entity; the rubber springs and the upper base seat can be inserted into the lower base seat; the rubber spring forms a cylinder shape with a through hole; the layer number of the rubber spring can be two or three; a partition board is arranged between each layer; the upper base seat, the lower base seat and the center hole of the partition plate are all provided with bosses which are matched with the inner diameter of the rubber springs. The utility model has the advantages that the structure is simple; the manufacture cost is low; the service life is long; the guide precision is high; the stress is uniform; the utility model effectively prevents each component of the oil pumping machine from being damaged, etc.

Description

The pumping unit elastic buffering mechanism

The utility model relates to the petroleum industry machinery technical field, particularly a kind of pumping unit elastic buffering mechanism.

At present, the used oil production equipment of China Petroleum mostly is the pumping unit that does not have damping device.The upper end of the outstanding rope (wire rope) on this pumping unit is fixed on the horse head (rocking bar of crankrocker mechanism), following termination rope hanger, polished rod passes rope hanger, its upper end is fixed on the rope hanger by square clip, following termination sucker rod, work characteristics is the at the uniform velocity rotation motion of reducer output shaft, middle by behind the crankrocker mechanism, make horse head (being rocking bar) arc trajectory in accordance with regulations do the speed change swing, the swing of rocking bar drives connected outstanding rope and rope hanger, sucker rod and oil pump are done to-and-fro motion vertically.Because the sucker rod of this pumping unit directly is set on the rope hanger, above-mentioned each parts are bearing bigger alternate load during work, particularly when moving to upper and lower dead point, under the effect of this alternate load, to produce violent vibration, thereby quicken the wearing and tearing and the destruction of each parts (especially sucker rod or polished rod).For this reason, people have developed the pumping unit of band damping device again, as disclosing the damping device on a kind of pumping unit that is used to recover the oil Chinese patent CN94207735.0 number.This damping device is arranged on the side's folder and the polished rod between the rope hanger of pumping unit, it is by spring, in, urceolus is formed, because the inner/outer tube of this buffer is for pegging graft, go to the bottom on it and sidewall thinner, intensity is low, yielding destruction, and depend merely on inner/outer tube on the hole (its vertical dimension is less) of going to the bottom lead, using effect is bad, unbalance stress, and cross section that the more important thing is its spring is trapezoidal, and adopt rubber body and metal frame bonding to form, therefore its intensity is low, and the life-span is low, and rubber body and metal frame easily come unglued, in addition, the spring of this metal frame and rubber body bonding, complex structure, cost is higher relatively.

The utility model improves at the problem that prior art exists, and design provides a kind of simple in structure, and cost is low, the intensity height, and the life-span is long, guiding accuracy height, stressed uniform pumping unit elastic buffering mechanism.

The utility model is achieved by following manner: the pumping unit elastic buffering mechanism that is provided with on a kind of polished rod between pumping unit side's clip and rope hanger, comprise, lower bottom base and interior rubber spring thereof, upper bed-plate can insert in the lower bottom base (also can adopt opposite insert structure certainly) and the two is concentric, their center is shaped on the center hole that is set on the polished rod, feature of the present utility model is: said lower bottom base is that tubular and rubber spring and upper bed-plate place in it, the Kong Chu of bottom center of lower bottom base is shaped on boss, and this boss external diameter cooperates installation with the internal diameter of rubber spring; The band through hole was cylindrical in the middle of said rubber spring was designed to, its internal diameter cooperates installation with the boss external diameter of upper and lower centre hole of base, this rubber spring can be two layers or three layers, be provided with dividing plate between every layer, the cross section of dividing plate is cross, its center is shaped on the center hole that can be set on the polished rod, is shaped on the boss that can cooperate with the rubber spring internal diameter up and down, and both sides then cooperate with the lower bottom base inwall; Said upper bed-plate is to be similar to piston can insert the interior entity structure of lower bottom base, increase the as above height of centre hole of base for improving the design of guiding accuracy and stress, and also be shaped on and the measure-alike boss of the boss of lower bottom base center hole in upper bed-plate bottom surface central hole, this boss external diameter cooperates installation with the internal diameter of rubber spring.Adopt Spielpassung between above-mentioned upper and lower base, rubber spring is by the boss clamping and positioning on upper and lower base and the dividing plate, the height of upper bed-plate cooperates the greatest limit height of descending compression rubber spring greater than it with the lower bottom base inwall, upper bed-plate also is shaped on the retaining platform with the maximum moving distance of restriction upper bed-plate in lower bottom base simultaneously.

The utility model is compared with prior art, has simple in structurely, and cost is low, the intensity height, and the life-span is long, and the guiding accuracy height stressedly evenly can prevent the damage of each parts of pumping unit effectively, and Safety performance is than characteristics such as height.

Fig. 1 is that the utility model is installed in square clip on the pumping unit and the position view between the rope hanger;

Fig. 2 is an erection drawing of the present utility model;

Fig. 3 is the plan view of Fig. 2.

Among the figure: 1 upper bed-plate, 2 rubber springs, 3 dividing plates, 4 lower bottom bases, 5 rope hangers, 6 polished rods, 7 retaining platforms, 8 side's clips, 9 outstanding ropes (or claiming wire rope), 10 center holes, 11 boss (boss of lower bottom base), 12 boss (boss of dividing plate), 13 boss (boss of upper bed-plate).

Most preferred embodiment of the present utility model, as Figure 1-3.The pumping unit elastic buffering mechanism that is provided with on a kind of polished rod 6 between pumping unit side's clip 8 and rope hanger 5, comprise upper and

lower base

1 and 4 and interior rubber spring 2, upper bed-plate 1 can insert in the lower bottom base 4 and the two is concentric, their center is shaped on the center hole 10 that is set on the polished rod 6, feature of the present utility model is: said lower bottom base 4 places in it for tubular and rubber spring 2 and upper bed-

plate

1,10 places, bottom center hole of lower bottom base 4 are shaped on boss 11, and these boss 11 external diameters cooperate installation with the internal diameter of rubber spring 2; The band through hole was cylindrical in the middle of said rubber spring 2 was designed to, its internal diameter cooperates installation with the boss external diameter of upper and lower centre hole of base 10, this rubber spring 2 can be two layers or three layers, be provided with dividing plate 3 between every layer, the cross section of dividing plate 3 is cross, its center is shaped on the center hole 10 that can be set on the polished rod 6, is shaped on the boss 12 that can cooperate with rubber spring 2 internal diameters up and down, and both sides then cooperate with lower bottom base 4 inwalls; Said upper bed-plate 1 can insert entity structure in the lower bottom base 4 for being similar to piston, for improving the height that the design of guiding accuracy and stress increases upper bed-plate 1 center hole 10, and also be shaped at upper bed-plate 1 bottom surface center hole 10 places and the measure-alike boss 13 of the boss 11 of lower bottom base center hole 10, these boss 13 external diameters cooperate installation with the internal diameter of rubber spring 2.Above-mentioned upper and

lower base

1 and 4 employing Spielpassung, rubber spring 2 is by

boss

13,11,12 clamping and positioning on upper and

lower base

1,4 and the dividing plate 3, the height of upper bed-plate 1 cooperates the greatest limit height of descending compression rubber spring 2 greater than it with lower bottom base 4 inwalls, upper bed-plate 1 also is shaped on the retaining platform with the maximum moving distance of restriction upper bed-plate 1 in lower bottom base 4 simultaneously.

Claims

1, the pumping unit elastic buffering mechanism that is provided with on a kind of polished rod between pumping unit side's clip and rope hanger, comprise upper and lower base and interior rubber spring thereof, upper bed-plate can insert in the lower bottom base and the two is concentric, and their center is shaped on the center hole that is set on the polished rod, it is characterized in that:

A, said lower bottom base are that tubular and rubber spring and upper bed-plate place in it, and the Kong Chu of bottom center of lower bottom base is shaped on boss, and this boss external diameter cooperates installation with the internal diameter of rubber spring;

The band through hole was cylindrical in the middle of B, said rubber spring were designed to, its internal diameter cooperates installation with the boss external diameter of upper and lower centre hole of base, this rubber spring can be two layers or three layers, be provided with dividing plate between every layer, the cross section of dividing plate is cross, its center is shaped on the center hole that can be set on the polished rod, is shaped on the boss that can cooperate with the rubber spring internal diameter up and down, and both sides then cooperate with the lower bottom base inwall;

C, said upper bed-plate are to be similar to piston can insert the interior entity structure of lower bottom base, for improving the height that the design of guiding accuracy and stress increases the upper bed-plate center hole, and also be shaped on and the measure-alike boss of the boss of lower bottom base center hole in upper bed-plate bottom surface central hole, this boss external diameter cooperates installation with the internal diameter of rubber spring.