CN102632373A - Cam preparation method and cam type four-cylinder single-action reciprocating pump - Google Patents
Cam preparation method and cam type four-cylinder single-action reciprocating pump Download PDFInfo
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- CN102632373A CN102632373A CN2012101030429A CN201210103042A CN102632373A CN 102632373 A CN102632373 A CN 102632373A CN 2012101030429 A CN2012101030429 A CN 2012101030429A CN 201210103042 A CN201210103042 A CN 201210103042A CN 102632373 A CN102632373 A CN 102632373A
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Abstract
The invention relates to a cam preparation method and a cam type four-cylinder single-action reciprocating pump. The cam preparation method comprises the following steps of: determining an upper contour line of contour radius vectors from R1 to R5 corresponding to the cam which rotates between 0 and Pi, wherein a lower contour line is symmetric with the upper contour line; copying the upper contour line to be a whole contour line of the cam; and lofting and forming. The cam type four-cylinder single-action reciprocating pump consists of four single-action cylinders, pistons of the single-action cylinders, piston rods connected with the pistons, intermediate rods connected with the piston rods, a transmission shaft, the cam arranged on the transmission shaft, a resetting framework arranged outside the cam, a guide framework arranged outside the resetting framework, bearings for enabling the transmission shaft to be fixed on the guide framework and a motor connected with the transmission shaft, wherein the cam comprises a cam I and a cam II which are prepared by the preparation method and have the same shape; and the cam I and the cam II are arranged on the transmission shaft in a manner of forming a 90-degree phase difference. According to the cam type four-cylinder single-action reciprocating pump, the reciprocating pump can output fluid constantly without any fluctuation, and the self-suction performance is high.
Description
Technical field
The present invention relates to the preparation method and the cam-type reciprocating pump of cam, specifically belong to a kind of preparation method and cam-type four cylinder single-acting reciprocating pumps of cam.
Background technology
Reciprocating pump is one of the most frequently used nucleus equipment of drilling operation, circulating fluid and slip casing by pressure etc. when being widely used in probing.Traditional reciprocating pump power end generally adopts toggle, and the reciprocating motion of its piston realizes through connecting rod, the conversion of the first-class mechanism of cross through rotatablely moving of crank.The accurate simple harmonic motion of toggle drives piston and does simple harmonic motion, and therefore, the output discharge capacity and the pressure of each cylinder of reciprocating pump are pulsed.In order to eliminate this pulsation as much as possible, often adopt the air bag, so not only do not reach desirable constant current constant voltage state, also make mechanism complicated.Also have and adopt cam structure; As being published in " petrochemical industry Journal of Chinese Universities " " three cylinder single-acting constant current amount reciprocating pump cam mechanism design " on the first phase in March, 2004; It discloses a kind of method about constant current amount reciprocating pump cam mechanism design; Though it can better solve the deficiency that traditional toggle exists, it has following shortcoming:
The contour curve that A, single cam adopt is done even acceleration the-at the uniform velocity-uniformly retarded motion according to piston and is calculated, and the radius of curvature of this profile has sudden change, causes the stress of catastrophe point to concentrate, and accelerates the cam fatigue damage.Though calendar year 2001 is published in " machine driving " fourth phase " optimization Design of Cam Curves of Constant Flow Pump " and curve is optimized the sudden change that can eliminate radius of curvature; But the characteristics of motion that the curvilinear equation after optimizing adopts is very complicated, has strengthened the difficulty that cam is produced in batches.
B, lobe pump adopt three cams to form constant flow rate with 2 π/3 phase differences in twos, in the pump operation process, and the wearing and tearing that key is connected between cam and the power output shaft, three cam synchronisms are difficult to assurance.
C, pump are in the work engineering, and each cam continues non-stop run, and the fatigue damage that heating produces has reduced the life cycle of pump.
Summary of the invention
The problem that the present invention will solve is; Can make the pressure and the discharge capacity of circulating fluid and slip casing by pressure output steady after a kind of preparation method of cam being provided and implementing this cam; Ease off reduces the moment of torsion of power transmission shaft, the preparation method and the cam-type four cylinder single-acting reciprocating pumps of cam simple in structure.
Realize the measure of above-mentioned purpose:
A kind of preparation method of cam, its step:
1) confirm the last outline line of cam, its step:
(1) confirm the corresponding profile radius vector R1 of cam between cam revolution 0～π/8, its distance is constant: 78.54mm;
(2) confirm the corresponding profile radius vector R2 of cam between cam revolution π/8～3 π/8; Its computing formula is:
, in the formula:
ф-be the angle that cam turns over, value is in π/8～3 π/8;
(3) confirm that cam turns round the corresponding profile radius vector R3 of cam between 3 π/8 ~ 5 π/8, its computing formula is:
ф-be the angle that cam turns over, value is in 3 π/8 ~ 5 π/8;
(4) confirm that cam turns round the corresponding profile radius vector R4 of cam between 5 π/8 ~ 7 π/8; Its computing formula is:
, in the formula:
ф-be the angle that cam turns over, value is in 5 π/8 ~ 7 π/8;
(5) confirm that cam turns round the corresponding profile radius vector R5 of cam between 7 π/8～π; Its computing formula is:
, in the formula:
ф-be the angle that cam turns over, value is at 7 π/8～π;
2) confirm the lower whorl profile of cam, lower whorl profile and last outline line are symmetric figure, duplicate its monolithic wheel profile that becomes cam is got final product so will go up outline line;
3) setting-out and machine-shaping.
Cam-type four cylinder single-acting reciprocating pumps; Its by the cam on the piston in single-acting cylinder one, single-acting cylinder two, single-acting cylinder three, single-acting cylinder four, each single-acting cylinder, the piston rod that is connected with piston, Jie's bar that is connected with piston rod, power transmission shaft, the power transmission shaft, reduction frame that cam is equipped with outward, be contained in the outer guide frame of reduction frame, the bearing of guide frame fixed conveyor axle, the motor that is connected with power transmission shaft and form; It is characterized in that: described cam is for adopting the identical cam one and the cam two of shape of above-mentioned preparation method's preparation, and cam one and cam two become the 90o phase difference to install on power transmission shaft.
The piston of cam-type four cylinder single-acting reciprocating pumps is in a stroke range, with static, cycloid motion, at the uniform velocity three kinds of different motion rules are combined to form continuous reciprocating motion each other.Its piston displacement, speed, acceleration change with the rule that angle changes.Pump has 1/4 not externally acting of time in one-period, continues the heat that acting produces so reduced piston; And guaranteeing to reduce the stroke of piston under the situation of maximal rate, reduce cam to electrical path length, thereby reduce the moment of torsion of power transmission shaft.
Lobe pump is symmetrical with respect to the central point center as the rate curve of each interval separation, piston with the multiple of π/8, so the new type of cam pump only needs two cams can form the constant flow rate of reciprocating pump.
The present invention compared with prior art has following main effect:
One of which, realize the ripple disable constant output of flow, eliminated the pulsation of reciprocating pump flow and pressure, improved the self-priming performance of reciprocating pump.
Two, through changing the characteristics of motion of piston, under the prerequisite that guarantees the piston maximal rate, can reduce the peak acceleration of piston, reduce the stroke of piston, and increase between the cam intermittent zones in each cycle, strengthen the anti-fatigue performance of cam.
Three, adopt the simple relatively characteristics of motion to eliminate cam and concentrate, both improved service behaviour, make that again it is easy to produce, processing because of the stress that the radius of curvature sudden change causes.
Four,, the total rotary inertia of cam generation and the peak acceleration of single piston are reduced,, realized high flow capacity, the constant flow rate of hanging down moment of torsion so the power transmission shaft required torque reduces owing to adopt double cam four cylinders to form constant flow rate.Adopt double cam mechanism to replace three cam mechanisms, improve the synchronism that cam rotates.
Description of drawings
Fig. 1 is reciprocating piston pump displacement, speed, acceleration comparison diagram
Fig. 2 is for adopting the cam face sketch map of the inventive method preparation
Fig. 3 is the structural representation of cam-type four cylinder single-acting reciprocating pumps
Fig. 4 is the structural representation of Fig. 2 cam
Fig. 5 is the stack situation sketch map of the output flow of single-acting cylinder one to single-acting cylinder one
Fig. 6 is the stack condition diagram of three cam-type single-acting reciprocating pump output flows of prior art employing
Among the figure:
-piston acceleration curve,
-piston displacement curve,
-piston speed curve; Cam profile curve between R1-0～π/8 behind the interpolation base radius of correspondence, the cam profile curve between R2-π/8～3 π/8 behind the interpolation base radius of correspondence, the cam profile curve between R3-3 π/8 ~ 5 π/8 behind the interpolation base radius of correspondence; Cam profile curve between R4-5 π/8 ~ 7 π/8 behind the interpolation base radius of correspondence, the cam profile curve between R5'-7 π/8 ~ π behind the interpolation base radius of correspondence, the flow of C1-single-acting cylinder one is with the cam angle degree change curve; The flow of C2-single-acting cylinder two is with the cam angle degree change curve; The flow of C3-single-acting cylinder three is with the cam angle degree change curve, and the flow of C4-single-acting cylinder four is with the cam angle degree change curve, and the stack of f1-four cylinder is the theoretical output flow of pump afterwards; Actual output flow behind the f2-four cylinder stack pump; 1-single-acting cylinder, one, 2-single-acting cylinder, two, 3-single-acting cylinder three; 4-single-acting cylinder four; 5-piston, 6-piston rod, 7-Jie bar; 8-power transmission shaft; 9-cam, 9-1-cam one, 9-2-cam two; 10-reduction frame; 11-guide frame, 12-bearing, 13-motor.
The specific embodiment
Describe in detail in the face of the present invention down:
Cam on the four cylinder single-acting reciprocating pumps of using for drilling project of preparation, its preparation process:
A kind of preparation method of cam, its step:
1) confirm the last outline line of cam, its step:
(1) confirm the corresponding profile radius vector R1 of cam between cam revolution 0～π/8, its distance is constant: 78.54mm;
(2) confirm the corresponding profile radius vector R2 of cam between cam revolution π/8～3 π/8:
The following formula of ф=π/8～3 π/8 substitutions is calculated:
=78.54～98.17 mm;
(3) confirm that cam turns round the corresponding profile radius vector R3 of cam between 3 π/8 ~ 5 π/8,
The following formula of ф=3 π/8 ~ 5 π/8 substitutions is calculated:
=98.17～137.44mm;
(4) confirm that cam turns round the corresponding profile radius vector R4 of cam between 5 π/8 ~ 7 π/8:
The following formula of ф=5 π/8 ~ 7 π/8 substitutions is calculated:
=137.44～157.08mm;
(5) confirm that cam turns round the corresponding profile radius vector R5 of cam between 7 π/8～π:
The radius vector outline line of R5 and R4 o'clock overlap in 7 π/8;
2), duplicate its monolithic wheel profile that becomes cam is got final product so will go up outline line because the lower whorl profile and the last outline line of cam is symmetric figure;
3) setting-out and machine-shaping on integral plate.
In conjunction with accompanying drawing cam-type four cylinder single-acting reciprocating pumps are specifically described: cam-type four cylinder single-acting reciprocating pumps, its by the cam 9 on the piston 5 in single-acting cylinder 1, single-acting cylinder 22, single-acting cylinder 33, single-acting cylinder 44, each single-acting cylinder, the piston rod 6 that is connected with piston 5, Jie's bar 7 that is connected with piston rod, power transmission shaft 8, the power transmission shaft, cam 9 outer reduction frame 10 that are equipped with, be contained in the outer guide frame 11 of reduction frame, the bearing 12 of guide frame 11 fixed conveyor axles 8, the motor 13 that is connected with power transmission shaft 8 and form.Described cam 9 is for adopting identical cam one 9-1 and cam two 9-2 of shape of above-mentioned preparation method's preparation, and cam one 9-1 and cam two 9-2 become the 90o phase difference to install on power transmission shaft 8.
From theoretical delivery curve of output f1 shown in Figure 5 still is actual flow curve of output f2, can find out that all cam reciprocating pump of the present invention all finally forms constant flow rate output, and pressure and flow do not produce pulsation.
Claims (2)
1. the preparation method of a cam, its step:
1) confirm the last outline line of cam, its step:
(1) confirm the corresponding profile radius vector R1 of cam between cam revolution 0～π/8, its distance is constant: 78.54mm;
(2) confirm the corresponding profile radius vector R2 of cam between cam revolution π/8～3 π/8; Its computing formula is:
, in the formula:
ф-be the angle that cam turns over, value is in π/8～3 π/8;
(3) confirm that cam turns round the corresponding profile radius vector R3 of cam between 3 π/8 ~ 5 π/8, its computing formula is:
ф-be the angle that cam turns over, value is in 3 π/8 ~ 5 π/8;
(4) confirm that cam turns round the corresponding profile radius vector R4 of cam between 5 π/8 ~ 7 π/8; Its computing formula is:
, in the formula:
ф-be the angle that cam turns over, value is in 5 π/8 ~ 7 π/8;
(5) confirm that cam turns round the corresponding profile radius vector R5 of cam between 7 π/8～π; Its computing formula is:
, in the formula:
ф-be the angle that cam turns over, value is at 7 π/8～π;
2) confirm the lower whorl profile of cam, lower whorl profile and last outline line are symmetric figure, duplicate its monolithic wheel profile that becomes cam is got final product so will go up outline line;
3) setting-out and machine-shaping.
2. cam-type four cylinder single-acting reciprocating pumps; Its by the cam on the piston in single-acting cylinder one, single-acting cylinder two, single-acting cylinder three, single-acting cylinder four, each single-acting cylinder, the piston rod that is connected with piston, Jie's bar that is connected with piston rod, power transmission shaft, the power transmission shaft, reduction frame that cam is equipped with outward, be contained in the outer guide frame of reduction frame, the bearing of guide frame fixed conveyor axle, the motor that is connected with power transmission shaft and form; It is characterized in that: described cam is for adopting the identical cam one and the cam two of shape of above-mentioned preparation method's preparation, and cam one and cam two become the 90o phase difference to install on power transmission shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101030429A CN102632373A (en) | 2012-04-10 | 2012-04-10 | Cam preparation method and cam type four-cylinder single-action reciprocating pump |
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|---|---|---|---|
| CN2012101030429A CN102632373A (en) | 2012-04-10 | 2012-04-10 | Cam preparation method and cam type four-cylinder single-action reciprocating pump |
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| CN102632373A true CN102632373A (en) | 2012-08-15 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015112502A1 (en) * | 2014-01-24 | 2015-07-30 | Omax Corporation | Pump systems and associated methods for use with waterjet systems and other high pressure fluid systems |
| CN110812237A (en) * | 2019-11-13 | 2020-02-21 | 辽宁天亿机械有限公司 | Novel filling mechanism of hard capsule filling machine |
| US10808688B1 (en) | 2017-07-03 | 2020-10-20 | Omax Corporation | High pressure pumps having a check valve keeper and associated systems and methods |
| CN112128094A (en) * | 2020-09-22 | 2020-12-25 | 电子科技大学中山学院 | Constant-diameter cam group for pulse-free constant-flow three-plunger pump |
| CN113476915A (en) * | 2021-07-19 | 2021-10-08 | 中铁二十二局集团第一工程有限公司 | Mud processing apparatus for building engineering |
| CN114992077A (en) * | 2022-08-08 | 2022-09-02 | 中石化胜利石油工程有限公司钻井工艺研究院 | Reciprocating pump |
| US11904494B2 (en) | 2020-03-30 | 2024-02-20 | Hypertherm, Inc. | Cylinder for a liquid jet pump with multi-functional interfacing longitudinal ends |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3411071B2 (en) * | 1993-10-29 | 2003-05-26 | 日機装株式会社 | Cam mechanism of non-pulsating pump |
| CN1869441A (en) * | 2006-06-22 | 2006-11-29 | 上海交通大学 | Method for determing cam outline shape of nonimpact constant flow double-plunger pump |
| CN102094777A (en) * | 2011-01-27 | 2011-06-15 | 北京清博华科技有限公司 | Plunger pump for preparing liquid chromatographic column |
-
2012
- 2012-04-10 CN CN2012101030429A patent/CN102632373A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3411071B2 (en) * | 1993-10-29 | 2003-05-26 | 日機装株式会社 | Cam mechanism of non-pulsating pump |
| CN1869441A (en) * | 2006-06-22 | 2006-11-29 | 上海交通大学 | Method for determing cam outline shape of nonimpact constant flow double-plunger pump |
| CN102094777A (en) * | 2011-01-27 | 2011-06-15 | 北京清博华科技有限公司 | Plunger pump for preparing liquid chromatographic column |
Non-Patent Citations (2)
| Title |
|---|
| 宋林松 等: "恒流量泵凸轮曲线优化设计", 《机械传动》 * |
| 梁庆 等: "基于MATLAB的无波动往复泵凸轮参数化设计", 《重型机械科技》 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015112502A1 (en) * | 2014-01-24 | 2015-07-30 | Omax Corporation | Pump systems and associated methods for use with waterjet systems and other high pressure fluid systems |
| US9810205B2 (en) | 2014-01-24 | 2017-11-07 | Omax Corporation | Pump systems and associated methods for use with waterjet systems and other high pressure fluid systems |
| US10808688B1 (en) | 2017-07-03 | 2020-10-20 | Omax Corporation | High pressure pumps having a check valve keeper and associated systems and methods |
| CN110812237A (en) * | 2019-11-13 | 2020-02-21 | 辽宁天亿机械有限公司 | Novel filling mechanism of hard capsule filling machine |
| US11904494B2 (en) | 2020-03-30 | 2024-02-20 | Hypertherm, Inc. | Cylinder for a liquid jet pump with multi-functional interfacing longitudinal ends |
| CN112128094A (en) * | 2020-09-22 | 2020-12-25 | 电子科技大学中山学院 | Constant-diameter cam group for pulse-free constant-flow three-plunger pump |
| CN113476915A (en) * | 2021-07-19 | 2021-10-08 | 中铁二十二局集团第一工程有限公司 | Mud processing apparatus for building engineering |
| CN114992077A (en) * | 2022-08-08 | 2022-09-02 | 中石化胜利石油工程有限公司钻井工艺研究院 | Reciprocating pump |
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Application publication date: 20120815 |