CN103954256A - Method for detecting scissors difference of two cranks of pumping unit - Google Patents
Method for detecting scissors difference of two cranks of pumping unit Download PDFInfo
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- CN103954256A CN103954256A CN201410220723.2A CN201410220723A CN103954256A CN 103954256 A CN103954256 A CN 103954256A CN 201410220723 A CN201410220723 A CN 201410220723A CN 103954256 A CN103954256 A CN 103954256A
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Abstract
A method for detecting the scissors difference of two cranks of a pumping unit comprises the following steps that firstly, after a load test of the whole pumping unit is conducted, the two cranks rotate to stop in the horizontal positions, and the inclination ratio alpha and the inclination ratio beta of the two cranks are measured respectively; secondly, the measured inclination ratios and the distance between the centers of pin holes of the cranks and the rotation center are substituted into a scissors difference computational formula J=d*| alpha-beta |, and the scissors difference of the two cranks of the pumping unit is obtained through calculation, wherein J is the scissors difference of the two cranks, d is the distance between the centers of the pin holes of the cranks and the rotation center, alpha is the inclination ratio of one crank, and beta is the inclination ratio of the other crank. According to the method for detecting the scissors difference of the two cranks of the pumping unit, a procedure is simple, errors caused by multiple times of indirect measurement are reduced, and accuracy of a detection result is high; manual operation is small, errors caused by personnel operation are reduced, detection accuracy is improved, the method can be conveniently implemented in a field, and practicality is high; a calculation method is simple, the requirement for the personnel level is not high, and operation and execution are easy.
Description
Technical field
The invention belongs to oil and gas industry oil pumper overall performance detection technique field, be specifically related to a kind of oil pumper two crank price scissors detection methods.
Background technology
Oil pumper is as the visual plant of field produces, and its complete machine stationarity, reliability and security, be the guarantee that ensures the steady low-consumption high-efficiency operation of oil pumper.Crank is in oil pumper, will rotatablely move to be converted into reciprocating vitals.In oil pumper overall performance Interventions Requested, two crank price scissors are one of very important Detection of contents.Whether two crank price scissors detection methods appropriately can directly affect the accuracy of testing result, and whether detection method is applicable to Site Detection and is convenient to personnel's operation also affecting the accuracy of testing result and the practical application of method.
Oil pumper factory is numerous at present, each plant produced technical merit is uneven, although substantially can carry out production according to relevant Standards of Pumping Units, but most factories detection technique level is limited, the method that detects oil pumper overall performance is different, causes part to adopt the oil pumper quality that the factory of old detection method dispatches from the factory not ensure.In GB/T29021-2012 " industrial gas oil walking-beam pumping unit ", definition " two crank price scissors " is " apart from the distance between rotation center two crank pin hole center lines farthest ".
Most of factory of the prior art adopts by the method for check rod inspection and detects two crank price scissors, this method by inserting the multiple indirect measurement two crank price scissors of check rod in crank pin hole, the method itself will be introduced larger measuring error, and field staff's operation also can increase measuring error.Research draws two China of the prior art national patent a kind of price scissors laser detecting apparatus (CN2013249604U) and a kind of price scissors electronic gauge (CN202511768U), these two kinds of instruments can improve the accuracy of detection in theory, but testing cost is high, require high to operator quality, and electronic product itself can bring the factors of instability, affect production testing, practical application is lower.
Adopt suitable detection method, to improving oil pumper two crank price scissors measurement accuracy and the significant and engineering actual value of rig-site utilization.The multiple indirect type measuring method that each oil pumper of the prior art factory adopts can not be measured two crank scissors differences exactly, and indivedual electronic type measuring instrument practical application and Measurement sensibility all can not meet Site Detection requirement.
Summary of the invention
The present invention is directed to prior art present situation, proposed a kind of oil pumper two crank price scissors detection methods that can accurately detect and be conducive to rig-site utilization.The method utilizes level meter directly to measure two crank rake ratios, calculates two crank price scissors by the rake ratio of measurement and the distance of crank pin hole center and rotation center.
To achieve these goals, the technical solution used in the present invention is as follows:
A kind of oil pumper two crank price scissors detection methods, comprise that step is as follows:
After step 1, oil pumper complete machine load test, two cranks turn and stop to horizontal level, measure respectively rake ratio α and the β of two cranks;
Step 2, by the distance substitution price scissors computing formula J=d of the described rake ratio detecting and crank pin hole center and rotation center × | alpha-beta |, calculate oil pumper two crank price scissors;
Wherein, J is two crank scissors differences, and d is the distance of crank pin hole center and rotation center, and α is a crank rake ratio, and β is another crank rake ratio.
Before described step 1, on two cranks, all process the detection faces that is respectively used to measure two crank rake ratio α and β;
In described step 1, after oil pumper complete machine load test, two cranks turn and stop to horizontal level, level meter are positioned in the described detection faces of a crank, measure this crank rake ratio α; Then level meter is positioned in the described detection faces of another crank, measures another crank rake ratio β.
Described detection faces is detection plane.
In the time that manufacture is installed on the crank pin hole of two cranks of same oil pumper and rotation center hole, time processing goes out the described detection plane of two cranks, ensure that the described detection plane of two cranks is in same plane, and and crank pin hole and rotation center hole between centre hole axis line parallel.
Adopt plane, milling mode time processing to go out the described detection plane of two cranks.
Usage level instrument is measured respectively two crank rake ratios, only needs two cranks to turn to be parked in the position of the relative level that level meter can measure when measurement, does not need two cranks to turn the position that is parked in abswolute level.
The present invention can be achieved through the following technical solutions:
Step 1: processing two crank detection faces.
In the time that manufacture is installed on the crank pin hole of two cranks of the left and right of same oil pumper and rotation center hole, adopt the mode time processing such as plane, milling to go out the detection plane of two cranks, ensure that left crank detection faces A and right crank detection faces B are in same plane, this plane and centre hole axis line parallel.
Step 2: after pump load test, detect two crank detection faces rake ratios.
After oil pumper assembling load test, adjust crank turning stopping bit and put, probably keep detection faces level.Level meter is positioned in a crank detection faces, measures this crank rake ratio α.Then level meter is positioned in another crank detection faces, measures another crank rake ratio β.
Step 3: calculate two crank price scissors by formula.
The distance d of crank pin hole center and rotation center is the distance in crank pin hole center and rotation center hole, can and bore milling processing from design drawing and directly obtain.Two crank price scissors J can calculate with following formula:
J＝d×|α-β|
Beneficial effect of the present invention can be summarized as follows:
1, the detection method program that the present invention proposes is simple, has reduced the error that multiple indirect measurement is introduced, and the accuracy of testing result is high.
2, in the detection method that the present invention proposes, manual operation is few, reduced personnel and operate the error of introducing, improved detection accuracy, is also convenient to field conduct, practical.
3, the computing method that relate in the present invention are simple, less demanding to personnel's level, easy operating and execution.
Brief description of the drawings
Fig. 1 is two crank detection faces schematic diagram in the embodiment of the present invention;
Wherein: A is left crank detection faces, B is right crank detection faces.
Fig. 2 is two crank rake ratio instrumentation plans in the embodiment of the present invention;
Wherein: S is level meter, J is two crank price scissors.
Fig. 3 is the distance schematic diagram of crank pin hole center and rotation center in the embodiment of the present invention;
Wherein: K1 is crank pin hole, and K2 is crank center hole, is rotation center hole, d is the distance of crank pin hole center and rotation center.
Embodiment
In order to make technical matters solved by the invention, technical scheme and beneficial effect clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
A kind of oil pumper two crank price scissors detection methods as shown in Figures 1 to 3, comprise that step is as follows:
After step 1, oil pumper complete machine load test, two cranks turn and stop to horizontal level, measure respectively rake ratio α and the β of two cranks;
Step 2, by the distance substitution price scissors computing formula J=d of the described rake ratio detecting and crank pin hole center and rotation center × | alpha-beta |, calculate oil pumper two crank price scissors;
Wherein, J is two crank scissors differences, and d is the distance of crank pin hole center and rotation center, and α is a crank rake ratio, and β is another crank rake ratio.
In the embodiment being more preferably, before described step 1, on two cranks, all process the detection faces that is respectively used to measure two crank rake ratio α and β; In described step 1, after oil pumper complete machine load test, two cranks turn and stop to horizontal level, level meter are positioned in the described detection faces of a crank, measure this crank rake ratio α; Then level meter is positioned in the described detection faces of another crank, measures another crank rake ratio β.Described detection faces is detection plane.
In the embodiment being more preferably, in the time that manufacture is installed on the crank pin hole of two cranks of same oil pumper and rotation center hole, time processing goes out the described detection plane of two cranks, ensure that the described detection plane of two cranks is in same plane, and and crank pin hole and rotation center hole between centre hole axis line parallel.Adopt plane, milling mode time processing to go out the described detection plane of two cranks.
In the embodiment being more preferably, usage level instrument is measured respectively two crank rake ratios, only needs two cranks to turn to be parked in the position of the relative level that level meter can measure when measurement, does not need two cranks to turn the position that is parked in abswolute level.
In certain specific embodiment: detect certain CYJ6-2.5-18HY type oil pumper two crank price scissors
(1) in the time that manufacture is installed on the crank pin hole of two cranks of the left and right of this oil pumper and rotation center hole, one time processed goes out detection plane, wherein left crank detection faces A and right crank detection faces B are in same plane, and this plane and centre hole axis line parallel, be shown in Fig. 1.
(2) after oil pumper assembling load test, adjust crank turning stopping bit and put, probably keep crank detection faces to be horizontal.Level meter is positioned over to left crank detection faces A upper, on level meter, the bubble of main air level has been moved to the left 51 scales (this level meter nominal scale division value is 0.02mm/m), measures left crank rake ratio α=1.02mm/m.Then level meter is positioned over to right crank detection faces B upper, on level meter, the bubble of main air level has been moved to the left 112 scales, measures right crank rake ratio β=2.24mm/m, sees Fig. 2.
(3) the distance d=0.65m that the distance that directly obtains crank pin hole center and crank center hole from the processing of design drawing and crank is crank pin hole center and rotation center, is shown in Fig. 3.By each numerical value substitution two crank price scissors computing formula J=d × | alpha-beta |, calculating this CYJ6-2.5-18HY type oil pumper two crank price scissors J is 0.79mm, meets standard-required.
Visible, the detection method program that the present invention proposes is simple, has reduced the error that multiple indirect measurement is introduced, and the accuracy of testing result is high.The artificial operation of the present invention is few, reduced personnel and operate the error of introducing, improved detection accuracy, is also convenient to field conduct, practical; And the computing method that relate in the present invention are simple, less demanding to personnel's level, easy operating and execution;
More than by the detailed description of concrete and preferred embodiment the present invention; but those skilled in the art should be understood that; the present invention is not limited to the above embodiment; within the spirit and principles in the present invention all; any amendment of doing, be equal to replacement etc., within protection scope of the present invention all should be included in.
Claims (6)
1. oil pumper two crank price scissors detection methods, is characterized in that, comprise that step is as follows:
After step 1, oil pumper complete machine load test, two cranks turn and stop to horizontal level, measure respectively rake ratio α and the β of two cranks;
Step 2, by the distance substitution price scissors computing formula J=d of the described rake ratio detecting and crank pin hole center and rotation center × | alpha-beta |, calculate oil pumper two crank price scissors;
Wherein, J is two crank scissors differences, and d is the distance of crank pin hole center and rotation center, and α is a crank rake ratio, and β is another crank rake ratio.
2. two crank price scissors detection methods according to claim 1, is characterized in that:
Before described step 1, on two cranks, all process the detection faces that is respectively used to measure two crank rake ratio α and β;
In described step 1, after oil pumper complete machine load test, two cranks turn and stop to horizontal level, level meter are positioned in the described detection faces of a crank, measure this crank rake ratio α; Then level meter is positioned in the described detection faces of another crank, measures another crank rake ratio β.
3. oil pumper two crank price scissors detection methods according to claim 2, is characterized in that: described detection faces is detection plane.
4. oil pumper two crank price scissors detection methods according to claim 3, it is characterized in that: in the time that manufacture is installed on the crank pin hole of two cranks of same oil pumper and rotation center hole, time processing goes out the described detection plane of two cranks, ensure that the described detection plane of two cranks is in same plane, and and crank pin hole and rotation center hole between centre hole axis line parallel.
5. oil pumper two crank price scissors detection methods according to claim 4, is characterized in that: adopt plane, milling mode time processing to go out the described detection plane of two cranks.
6. two crank price scissors detection methods according to claim 1, it is characterized in that: usage level instrument is measured respectively two crank rake ratios, the position that only needs two cranks to turn to be parked in the relative level that level meter can measure when measurement, does not need two cranks to turn the position that is parked in abswolute level.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410220723.2A CN103954256A (en) | 2014-05-23 | 2014-05-23 | Method for detecting scissors difference of two cranks of pumping unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410220723.2A CN103954256A (en) | 2014-05-23 | 2014-05-23 | Method for detecting scissors difference of two cranks of pumping unit |
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| CN103954256A true CN103954256A (en) | 2014-07-30 |
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| CN201410220723.2A Pending CN103954256A (en) | 2014-05-23 | 2014-05-23 | Method for detecting scissors difference of two cranks of pumping unit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107687806A (en) * | 2017-09-11 | 2018-02-13 | 中国石油天然气集团公司 | Oil pumping machine crank scissors difference measuring device and its application method |
| CN107687806B (en) * | 2017-09-11 | 2024-06-04 | 中国石油天然气集团公司 | Crank and shear difference measuring device of pumping unit and using method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57200811A (en) * | 1981-06-04 | 1982-12-09 | Fuji Heavy Ind Ltd | Crank angle detecting device |
| US4473950A (en) * | 1983-02-18 | 1984-10-02 | The Indikon Company | Crankshaft alignment tool |
| CN2258547Y (en) * | 1995-09-29 | 1997-07-30 | 贾锡田 | Crank connecting link type beam-free oil pumping machine |
| CN202511768U (en) * | 2012-04-25 | 2012-10-31 | 中国石油天然气股份有限公司 | Scissors difference electronic measuring instrument |
| CN203249604U (en) * | 2013-06-01 | 2013-10-23 | 刘敏勇 | Laser detector for scissors difference between cranks of oil pumping unit |
-
2014
- 2014-05-23 CN CN201410220723.2A patent/CN103954256A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57200811A (en) * | 1981-06-04 | 1982-12-09 | Fuji Heavy Ind Ltd | Crank angle detecting device |
| US4473950A (en) * | 1983-02-18 | 1984-10-02 | The Indikon Company | Crankshaft alignment tool |
| CN2258547Y (en) * | 1995-09-29 | 1997-07-30 | 贾锡田 | Crank connecting link type beam-free oil pumping machine |
| CN202511768U (en) * | 2012-04-25 | 2012-10-31 | 中国石油天然气股份有限公司 | Scissors difference electronic measuring instrument |
| CN203249604U (en) * | 2013-06-01 | 2013-10-23 | 刘敏勇 | Laser detector for scissors difference between cranks of oil pumping unit |
Non-Patent Citations (2)
| Title |
|---|
| 张前保等: "基础不水平时剪刀差测量法", 《中国科技纵横》 * |
| 皇甫建平等: "抽油机"两曲柄剪刀差"检测方法的分析与探讨", 《第四届十三省区市机械工程学会科技论坛暨2008海南机械科技论坛论文集》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107687806A (en) * | 2017-09-11 | 2018-02-13 | 中国石油天然气集团公司 | Oil pumping machine crank scissors difference measuring device and its application method |
| CN107687806B (en) * | 2017-09-11 | 2024-06-04 | 中国石油天然气集团公司 | Crank and shear difference measuring device of pumping unit and using method thereof |
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