CN2219958Y

CN2219958Y - Energy-saving beam-pumping unit

Info

Publication number: CN2219958Y
Application number: CN 95204971
Authority: CN
Inventors: 张晓宜
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-04-07
Filing date: 1995-04-07
Publication date: 1996-02-14
Anticipated expiration: 2005-04-07

Abstract

The utility model relates to an energy-saving beam-pumping unit. The overall structure and working principle of the utility model are basically the same with the prior art. With reducing the sizes of back arms of the beam and a crank radius, increasing the bar length ratio, enlarging the minimum pressure angle of an upstroke and enlarging the crank angle between two limit positions, energy consumption of the utility model is reduced and liquid producing quantity is also increased. The complete machine runs stably and the construction is simple with low costs, so the utility model is especially suitable for the reformation of the prior art.

Description

Energy-saving beam-pumping unit

The utility model relates to a kind of beam-pumping unit.

The conventional type beam-pumping unit is a kind of equipment that carries out the oilbearing stratum mechanical oil recovery, uses for a long time in China, because of it has simple in structure, easy to operate, durable, dry sound is little, plurality of advantages such as safe and reliable, so, in the long period from now on, be used continuing.But because its load fluctuation is bigger, the fluctuating load coefficient is up to about 1.57, and the engine power output is higher, also is the energy consumption height, so, be one that consumes energy maximum in the crude oil production, wasted a large amount of energy.The modification scheme to old three types that people such as Jilin Oil Field Ai Chunhua finish is the effective length that prolongs walking beam postbrachium and connecting rod, make four-bar mechanism have crank angle between two limit positions, the upstroke time is longer than the down stroke time, make the maximum suspension point acceleration of upstroke, maximum polished rod load reduce, though this scheme has improved the oil well pump coefficient of fullness, increased the production fluid amount, but had following deficiency: energy consumption is still higher; Because crank and connecting rod all need redesign processing, make that the transformation processing cost is higher; Only being suitable for new mechanism makes.

The purpose of this utility model is to avoid above-mentioned weak point of the prior art, and provides a kind of supporting capacity and production fluid amount all higher, and complete machine operates steadily, and energy consumption is low, prior art is transformed slightly the energy-saving beam-pumping unit that can realize.

The purpose of this utility model can reach by following measure:

A kind of energy-saving beam-pumping unit comprises power-equipment, and it links to each other with quadric chain through reduction box; The walking beam fulcrum O1 of described quadric chain and the line of crank axle center O constitute fixed bar, and motion bar is made of crank (2), connecting rod (4) and walking beam postbrachium (6); The upper end of described connecting rod (4) links to each other with walking beam postbrachium (6), its lower end links to each other with an end of crank (2), the output shaft of another termination reduction box of crank (2), described walking beam postbrachium (6) tail end is provided with balance plate (5), described crank (2) outer end is provided with counterweight (3), its special character is that the size C of described walking beam postbrachium (6) is 1.26～1.38 meters; Described crank (2) is provided with a set of bell cranks pin-and-hole (14), and the radius size R of the crank of its formation (2) is 0.55～0.42 meter; Bar length is 0.70～0.85 than I/ (R+C); Upstroke minimum pressure angle β is not less than 67.5 °; Polarincludedangle ' be 4.5 °～6.5 °.

Walking beam postbrachium size C of the present utility model can be 1.38 meters, and described crank (2) is provided with four uniform connecting rod pin-and-holes (14), and the throw of crankshaft size R of its formation can be respectively 0.52,0.45,0.38 and 0.31 meter.

Walking beam postbrachium size C of the present utility model also can be 1.33 meters, and described crank (2) is provided with four uniform connecting rod pin-and-holes (14), and the throw of crankshaft size R of its formation is respectively 0.51,0.44,0.37 and 0.30 meter.

Walking beam postbrachium size C of the present utility model also can be 1.28 meters, and described crank (2) is provided with four uniform connecting rod pin-and-holes (14), and the throw of crankshaft size R of its formation is respectively 0.50,0.43,0.36 and 0.29 meter.

The accompanying drawing drawing is described as follows:

Fig. 1 is the structural representation of the utility model complete machine.

Fig. 2 is the structural representation of the utility model walking beam postbrachium.

Fig. 3 is the structural representation of the utility model crank.

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

Overall structure of the present utility model and operating principle and prior art are basic identical, mainly are made of four major parts such as quadric chain, reduction box, power-equipment and auxiliary equipment.Referring to Fig. 1, quadric chain is the bar that fixes of the line with walking beam fulcrum O1 and crank axle center O, is that three movable rod members are formed with crank 2, connecting rod 4 and walking beam postbrachium 6.During work, engine is passed to crank axle drive crank 2 with high speed rotary motion by belt and reduction box and is made low speed rotation.Crank 2 drives walking beams 7 by connecting rod 4 and does upper and lower swing, hangs over polished rod eye 9 on the horse head 8 and just drives sucker rod 10 and do upper and lower reciprocating motion, extracts crude oil out ground from deep under ground thereby drive underground oil well pump.Crank 2 whenever circles from clock and watch 12 o ' clock positions, sucker rod 10 upper and lower motions once, then oil well pump is finished the overall process of a upstroke oil suction and a stroke of down stroke oil extraction.Because upstroke suspending point loading W is heavy during suction crude oil, down stroke is light, make the work done in a stroke of reductor and engine extremely uneven, and when down stroke, make negative work, so at crank 2 ends configuration counterweight 3, at walking beam 7 tail ends configuration beam balance plate 5, make the upper and lower stroke work done of engine be tending towards equal, so that crank axle 1 output torque tends to balance.Yet conventional machine crank axle 1 output torque in fact still exists than great fluctuation process, and fluctuating load coefficient CLF makes the engine power output still bigger up to 1.57, and promptly energy consumption is higher.The utility model is by changing the size of crank 2 and walking beam postbrachium 6, improving bar length is worth than I/ (R+C), the increase polarincludedangle ', kinematic parameter, kinetic parameter are optimized selection again, change the Changing Pattern of suspension point acceleration a, torque factor TF and crank axle output torque TN, its peak value in upstroke is greatly reduced, thereby reduce the fluctuation of crank axle output torque TN, reduce engine power output Ne, fluctuating load coefficient CLF value, improve the complete machine power performance, reach energy saving purposes.I is the horizontal range of crank axle center O to walking beam fulcrum O1, and it is former machine size.Specific embodiments is as follows:

1, dwindles the size C of walking beam postbrachium 6.

Referring to Fig. 2, walking beam postbrachium 6 is that bearing support by four bolts and connecting rod 4 upper ends is at O ₂Point is connected, and dwindles 6 need of walking beam postbrachium the position of stiffener 12 and four bolts hole 11 size by walking beam postbrachium 6 is moved right, and welds stiffener 12 again, and makes a call to four bolts hole again and get final product.The size C of walking beam postbrachium 6 can be 1.28～1.38 meters.

2, dwindle the radius size R of crank 2.

Referring to Fig. 3, the installing hole 13 on the crank 2 is contained on the bearing of reduction gearbox output shaft, the pin-and-hole O on the crank 2 ₃～O ₆To be connected by pin with the pin-and-hole of connecting rod 4 lower ends respectively.Connecting rod 4 and different crank pin hole 14 connections just form different throw of crankshaft size R, thereby realize the different stroke of polished rod of oil pumper.Dwindle throw of crankshaft size R, only need pin-and-hole O ₃～O ₆Get final product by the design of the new size after dwindling, processing.

3, reconfigure beam balance plate 5.

Only the number of balance plate 5 need be increased and decreased on demand and get final product.

4, increase polarincludedangle '.

Polarincludedangle ' refer to connecting rod 4 is in the last folded angle of crank 2 during to point with down to some two limit positions.The increase polarincludedangle ' be to realize automatically after changing throw of crankshaft size R and walking beam postbrachium size C.

Be the optimum size of several groups of walking beam postbrachium size C and throw of crankshaft size R and corresponding bar length value below than I/ (R+C):

First group of C=1.38; R ₁=0.52, R ₂=0.45, R ₃=0.38, R ₄=

0.31；I/(R＋C)＝0.75，β＝67.5°。

Second group of C=1.33; R ₁=0.51, R ₂=0.44, R ₃=0.37, R ₄=

0.30；I/(R＋C)＝0.77，β＝68.8°。

The 3rd group of C=1.28; R ₁=0.5, R ₂=0.43, R ₃=0.36, R ₄=

0.29; I/ (R+C)=0.80, β=70.1 ° its upstroke minimum pressure angle β must not less than angle be respectively 67.5 °, 68.8 ° and 70.1 °; Polarincludedangle ' between 4.5 °～6.5 °.

The utility model is applicable to all conventional type beam-pumping units, and then effect is better to be used for conventional machine of plural equilibrium formula and the conventional machine of two types.

The utility model compared with prior art has following advantage:

1, under identical working condition, the decelerator maximum output torque reduces 20.2 than former machine～34.8%, the root-mean-square value of its crankshaft torque is reduced, the motor power consumption is fallen Low 5.4～17.7%.

2, the suspension point acceleration peak value reduces 10～16.06%, the up-down stroke change in torque width of cloth Degree greatly reduces, and output torque is more steady, and the alternate load coefficient is down to below 1.355, The complete machine operation is more steady.

3, owing to there is crank angle between two limit positions, upstroke is slow, and down stroke is fast, and pump efficiency is improved, Increased the production fluid amount.

4, rebuilding construction is simple and easy to do, is very suitable for carrying out reducing energy consumption with oil pumper. When the oil pumper overhaul, more renew crank, again weld stiffener and make a call to four bolts hole, Machine adds, welding equipment just can be transformed the conventional machine of active service as long as slightly have. Perhaps utilize New crank size, R are realized on the former machine crank second and third, four, five grades of holes₁～R ₄Also can realize the conventional machine of active service is transformed.

5, improvement expenses is cheap, and income is very big. Be used for retrofitting of used machine, then improvement cost About 1900 yuan/platform if transform 1000 three type machines, is pressed power saving rate 10%, electricity price 0.45 Unit/degree calculates, 422.4 ten thousand degree that then economize on electricity/year, be worth 1.9 hundred ten thousand yuan/year. 1 year just Recoverable investment for trnasforming urban land, overall economic efficiency is considerable. And when making new machine, implement this Technology then need not increase any technology and capital investment.

Claims

1, a kind of energy-saving beam-pumping unit comprises power-equipment, and it links to each other with quadric chain through reduction box; The walking beam fulcrum O1 of described quadric chain and the line of crank axle center O constitute fixed bar, and motion bar is made of crank (2), connecting rod (4) and walking beam postbrachium (6); The upper end of described connecting rod (4) links to each other with walking beam postbrachium (6), its lower end links to each other with an end of crank (2), the output shaft of another termination reduction box of crank (2), described walking beam postbrachium (6) tail end is provided with balance plate (5), described crank (2) outer end is provided with counterweight (3), it is characterized in that: the size C of described walking beam postbrachium (6) is 1.26～1.38 meters; Described crank (2) is provided with a set of bell cranks pin-and-hole (14), and the radius size R of the crank of its formation (2) is 0.55～0.42 meter; Bar length is 0.70～0.85 than I/ (R+C); Upstroke minimum pressure angle β is not less than 67.5 °; Polarincludedangle ' be 4.5 °～6.5 °.

2, energy-saving beam-pumping unit as claimed in claim 1, it is characterized in that: described walking beam postbrachium size C is 1.38 meters, described crank (2) is provided with four uniform connecting rod pin-and-holes (14), and the throw of crankshaft size R of its formation is respectively 0.52,0.45,0.38 and 0.31 meter.

3, energy-saving beam-pumping unit as claimed in claim 1, it is characterized in that: described walking beam postbrachium size C is 1.33 meters, described crank (2) is provided with four uniform connecting rod pin-and-holes (14), and the throw of crankshaft size R of its formation is respectively 0.51,0.44,0.37 and 0.30 meter.

4, energy-saving beam-pumping unit as claimed in claim 1, it is characterized in that: described walking beam postbrachium size C is 1.28 meters, described crank (2) is provided with four uniform connecting rod pin-and-holes (14), and the throw of crankshaft size R of its formation is respectively 0.50,0.43,0.36 and 0.29 meter.