CN113339250A - Plunger pump rotor oil window wrap angle detection method - Google Patents

Plunger pump rotor oil window wrap angle detection method Download PDF

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Publication number
CN113339250A
CN113339250A CN202110738766.XA CN202110738766A CN113339250A CN 113339250 A CN113339250 A CN 113339250A CN 202110738766 A CN202110738766 A CN 202110738766A CN 113339250 A CN113339250 A CN 113339250A
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Prior art keywords
oil
oil window
wrap angle
size
rotor
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CN113339250B (en
Inventor
谯维智
陆红林
刘晓超
高翔
穆文堪
王振宇
焦宗夏
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Beihang University
Ningbo Institute of Innovation of Beihang University
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Beihang University
Ningbo Institute of Innovation of Beihang University
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B51/00—Testing machines, pumps, or pumping installations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/18—Lubricating

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • A Measuring Device Byusing Mechanical Method (AREA)

Abstract

A plunger pump rotor oil window wrap angle detection method comprises the following steps: obtaining the required size of the outer diameter of an oil window hole of a plunger pump rotor, the required size of the inner diameter of the oil window hole and the required size of an oil window wrap angle, and calculating the required size of the width of the oil window according to the required size of the outer diameter of the oil window hole, the required size of the inner diameter of the oil window hole and the required size of the oil window wrap angle; after the oil window hole of the plunger pump rotor is processed, detecting the measuring size of the width of the oil window of the plunger pump rotor; and (3) judging: when the measuring size of the oil window width and the required size of the oil window width are within the preset error range, the part is qualified. The oil window width can be measured through a commonly used measuring tool caliper, so that whether the wrap angle size of the oil window is qualified or not is judged, the cost is low, and the measurement is convenient. Meanwhile, the oil window wrap angle can be accurately calculated.

Description

Plunger pump rotor oil window wrap angle detection method
Technical Field
The disclosure belongs to the technical field of plunger pumps, and particularly relates to a plunger pump rotor oil window wrap angle detection method.
Background
The plunger hydraulic pump and the plunger hydraulic motor are core components of a hydraulic system, a rotor is used as one of key parts of the plunger hydraulic pump and the plunger hydraulic motor, a rotor oil window is one of important structural parameters of the rotor, the conventional oil window wrap angle calculation is performed by drawing measurement or initial approximate calculation in a common method, the calculation process is very inconvenient except for inaccurate calculated values, and the accurate calculation of the oil window wrap angle is very important for calculating the stress, the service life and the like of the rotor when the structural stress analysis and the parameter design calculation of the rotor are performed. Meanwhile, after the rotor part is machined, the oil window wrap angle is difficult to measure, the measurement can be finished only by special measuring equipment and special technical personnel, and the investment, use and maintenance cost is high.
Disclosure of Invention
In order to solve at least one of the above technical problems, the present disclosure aims to calculate the oil window wrap angle of the rotor conveniently and accurately by controlling three structural parameters, such as the width L and the inner and outer diameters, of the length of the oil window of the rotor, so that the calculation accuracy and the calculation efficiency of the oil window wrap angle of the rotor of the plunger pump are greatly improved. After the rotor part is machined, the measuring tool can measure the rotor oil window wrap angle through a common measuring tool caliper, the cost is low, and the measurement is convenient.
In order to achieve the purpose of the disclosure, the technical scheme adopted by the disclosure is as follows:
a plunger pump rotor oil window wrap angle detection method comprises the following steps:
obtaining the required size of the outer diameter of an oil window hole of a plunger pump rotor, the required size of the inner diameter of the oil window hole and the required size of a wrap angle of the oil window,
calculating the required size of the oil window width according to the required size of the outer diameter of the oil window hole, the required size of the inner diameter of the oil window hole and the required size of the wrap angle of the oil window;
after the oil window hole of the plunger pump rotor is processed, detecting the measuring size of the width of the oil window of the plunger pump rotor;
and (3) judging: when the measuring size of the oil window width and the required size of the oil window width are within the preset error range, the plunger pump rotor is qualified.
Optionally, calculating the required size of the oil window width by the following formula;
Figure BDA0003140743230000021
wherein, alpha'0Is the required size of the oil window wrap angle,
Figure BDA0003140743230000022
is the required size of the outer diameter of the oil window hole,
Figure BDA0003140743230000023
is a required dimension of the inner diameter of the oil window hole, and L' is a required dimension of the width of the oil window.
Optionally, the measuring size of the outer diameter of the oil window hole and the measuring size of the inner diameter of the oil window hole are also obtained, and the measuring size of the wrap angle of the oil window of the rotor of the plunger pump is obtained according to the measuring size of the outer diameter of the oil window hole, the measuring size of the inner diameter of the oil window hole and the measuring size of the width of the oil window;
in the judging step, when the measured size of the oil window wrap angle is within the preset error range of the required size of the oil window wrap angle, the plunger pump rotor is qualified.
Optionally, the measured size of the oil window wrap angle is calculated by the following formula:
Figure BDA0003140743230000024
wherein alpha is0Is the measuring size of the wrap angle of the oil window,
Figure BDA0003140743230000025
is the measurement size of the outer diameter of the oil window hole,
Figure BDA0003140743230000026
is the measured dimension of the inner diameter of the oil window aperture, and L is the measured dimension of the oil window width.
Optionally, the separation force of the oil distribution window and the sealing belt oil film on the rotor is calculated according to the measuring size of the wrap angle of the oil window;
in the judging step, the separating force of the rotor meets the force balance equation of the friction pair of the rotor and the oil distribution disc, and the plunger pump rotor is qualified.
Optionally, the force balance equation is,
Pf＝(1-ψ)Py
Figure BDA0003140743230000027
Figure BDA0003140743230000028
wherein, PfIs a separating force, PyIs the pressing force, psi is the pressing coefficient,
Figure BDA0003140743230000029
is the average wrap angle, Z is the number of plungers, alpha is the rotor plunger hole pitch angle, alpha0Is the measuring size of the wrap angle of the oil window,
Figure BDA00031407432300000210
is the measurement size of the diameter of the outer sealing belt,
Figure BDA00031407432300000211
is the measurement size of the outer diameter of the oil window hole,
Figure BDA00031407432300000212
is the measured size of the inner diameter of the oil window hole,
Figure BDA00031407432300000213
is the measurement of the diameter of the inner sealing band, pbIs the oil window oil pressure.
Optionally, calculating the total separation moment of the friction pair of the rotor and the oil distribution disc according to the measurement size of the wrap angle of the oil window;
in the judging step, the total separating moment meets a moment balance equation of a friction pair of the rotor and the oil distribution disc, and the rotor of the plunger pump is qualified.
Optionally, the total separation moment is calculated by the following system of equations:
Figure BDA0003140743230000031
Mf＝Pf*oc2
wherein, oc2Is a moment arm of separation moment, wherein, oc2Is a moment arm of separating moment, Pf1Indicates the outer sealing tape separating force, Pf2Indicating the inner sealing band separating force, Pf3Indicating the window separating force, R1Denotes the outer sealing band radius, R2Denotes the outer diameter of the oil drainage window, R3Denotes the inner diameter of the oil drain window, R4Denotes the radius of the sealing band, MfIs the total separating moment;
the moment balance equation of the rotor and the oil distribution disc friction pair is as follows:
Mf＝(1-K)My
where K is the moment coefficient, MyIs the tightening torque.
Optionally, the measured dimension of the outer diameter of the oil window hole, the measured dimension of the inner diameter of the oil window hole and the measured dimension of the width of the oil window are measured by a vernier caliper.
In the disclosure, the required dimension is a design dimension, the expression form is generally a marked dimension on a drawing, and the measurement dimension is the actual dimension of the part measured after the part is processed; the required size of the oil window width is calculated through the size parameters of the plunger pump rotor, and after the rotor parts are machined, the oil window width can be measured through a commonly-used measuring tool caliper, so that whether the oil window wrap angle size is qualified or not is judged, the cost is low, and the measurement is convenient. Meanwhile, the oil window wrap angle can be accurately calculated. The oil window wrap angle is accurately calculated, the actual average wrap angle and the separating moment force arm of the sealing belt can be accurately calculated, so that the separating force and the separating moment of an oil window of the oil distribution disc and an oil film of the sealing belt on the rotor can be accurately calculated, a proper compression coefficient and a proper moment coefficient are selected, a force balance equation and a moment balance equation of the rotor are accurately calculated, the stress and the moment of the rotor are balanced, and the service life, the reliability and the output quality of the plunger pump are improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the disclosure and together with the description serve to explain the principles of the disclosure.
FIG. 1 is a schematic structural view of a plunger pump rotor according to the present disclosure;
FIG. 2 is a schematic illustration of the plunger pump rotor wrap angle calculation and geometry relationship of the present disclosure;
FIG. 3 is an enlarged partial view at I of FIG. 2;
FIG. 4 is a schematic view of an actual wrap angle structure of a plunger pump rotor oil distribution disc sealing belt according to the present disclosure;
FIG. 5 is a schematic view of the configuration of the compression angle of the oil distribution pan of the rotor of the plunger pump according to the present disclosure.
Detailed Description
The present disclosure will be described in further detail with reference to the drawings and embodiments. It is to be understood that the specific embodiments described herein are for purposes of illustration only and are not to be construed as limitations of the present disclosure. It should be further noted that, for the convenience of description, only the portions relevant to the present disclosure are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present disclosure may be combined with each other without conflict. The present disclosure will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Example one
Firstly, the relation between the outer diameter of an oil window hole of the plunger pump, the inner diameter of the oil window hole, the wrap angle of the oil window and the width of the oil window is analyzed.
In the analysis of the present embodiment, the dimensions are all required dimensions, and as shown in fig. 1, fig. 2, and fig. 3, the point O is known as the center of the rotor rotation axis, and the point O is known as the point OSIs the center of a circle with the width of a waist-shaped oil window hole tangent to each other and the diameter of the circle
Figure BDA0003140743230000041
The kidney-shaped oil window hole 1 is symmetrical along the y axis, and the connecting point O and the point O are connectedSThe cross point O is used as the tangent circle of the width of the oil window
Figure BDA0003140743230000042
Tangent line of circle, perpendicular foot B, connects to OSB, making
Figure BDA0003140743230000043
Tangent to the circle and perpendicular to the horizontal axis x, with the foot C, and
Figure BDA0003140743230000044
the tangent point of the circle is E, the extension OB intersects with the straight line CE at the point D, and passes through OSThe point is taken as the perpendicular line of the X axis, the foot is taken as the point A, and the oil window wrap angle is set as alpha0Half angle is gammah，∠OSOA is alpha1,∠OSOB is alpha2。
According to the geometrical relationship, the following steps are carried out:
Figure BDA0003140743230000045
can obtain the product
Figure BDA0003140743230000046
At Δ OSIn the OB, the content of the organic compound,
Figure BDA0003140743230000047
then there are:
Figure BDA0003140743230000048
the following can be obtained:
Figure BDA0003140743230000051
in the case of a.DELTA.DOC,
Figure BDA0003140743230000052
then there are:
Figure BDA0003140743230000053
and at Δ OSAmong OA, there are:
Figure BDA0003140743230000054
the following can be obtained:
Figure BDA0003140743230000055
and (3) knowing: gamma rayh＝90°-∠BOC＝90°-(α1-α2)
Therefore, the following steps are carried out:
Figure BDA0003140743230000056
from the above formula, it can be seen that the oil window wrap angle α of the rotor0Only with the outer diameter of the oil window
Figure BDA0003140743230000057
Inner diameter of oil window hole
Figure BDA0003140743230000058
The length L of the oil window is related, the width L of the oil window is a size parameter of the oil window mainly controlled by the invention, the oil window can be measured by a common caliper, and the wrap angle of the oil window can be accurately calculated by the derived formula through the measured width value of the oil window. The angle of the traditional oil window wrap angle is controlled, once the rotor part is machined, the value of the oil window wrap angle of the rotor cannot be measured through a common measuring tool, three-coordinate or special measuring equipment is required, the equipment is expensive in price, complex in technology and high in use and maintenance cost, and can be used by professional technicians.
Example two
Because the part need contrast measurement size and required size when measuring, and the required size is the design size, and the expression form generally is the mark size on the drawing, and the measurement size is the actual size of part through measuring after the parts machining, can judge whether qualified through measurement size and required size plunger pump rotor oil window cornerite size.
Referring to fig. 1, the present disclosure provides a method for detecting an oil window wrap angle of a plunger pump rotor, including:
obtaining the required size of the external diameter of the oil window of the plunger pump rotor
Figure BDA0003140743230000061
Desired size of inner diameter of oil window hole
Figure BDA0003140743230000062
And required size of oil window wrap angle α'0Is a design size in designing the plunger pump rotor. When the rotor is machined, the machined patent is required to be ensured to be within the error range of the size;
according to the required size of the outer diameter of the oil window hole
Figure BDA0003140743230000063
Desired size of inner diameter of oil window hole
Figure BDA0003140743230000064
And required size of oil window wrap angle α'0Calculating the required size of the oil window width L'; the required size alpha 'of the oil window wrap angle is obtained through the step'0The required size of the oil window wrap angle is defined by changing the required size of the oil window width L' into the required size of the outer diameter of the oil window hole
Figure BDA0003140743230000065
Desired size of inner diameter of oil window hole
Figure BDA0003140743230000066
And required size of oil window wrap angle α'0When the oil window width is not changed, the required size of the oil window width L' is a certain value.
Specifically, the required size of the oil window width can be calculated by the following formula;
Figure BDA0003140743230000067
wherein, alpha'0Is the required size of the oil window wrap angle,
Figure BDA0003140743230000068
is the required size of the outer diameter of the oil window hole,
Figure BDA00031407432300000614
is a required dimension of the inner diameter of the oil window hole, and L' is a required dimension of the width of the oil window. The desired size of the oil window width can also be calculated directly by CAD or modeling.
After the oil window hole of the plunger pump rotor is processed, detecting the measurement dimension L of the width of the oil window of the plunger pump rotor;
and (3) judging: and when the measuring dimension L of the oil window width and the required dimension L' of the oil window width are within the preset error range, the plunger pump rotor is qualified. Whether the oil window wrap angle of the plunger pump rotor oil window wrap angle is qualified or not can be identified through whether the measured oil window width value is within a preset error range or not.
In one embodiment, since there is a possibility that an error may occur in the outer diameter of the oil window hole or the inner diameter of the oil window hole during machining, a measurement size of the outer diameter of the oil window hole is obtained in order to improve the detection accuracy
Figure BDA0003140743230000069
Measurement of inner diameter of oil window hole
Figure BDA00031407432300000610
According to the measurement size of the outer diameter of the oil window hole
Figure BDA00031407432300000611
Measurement of inner diameter of oil window hole
Figure BDA00031407432300000612
And the measurement dimension L of the oil window width obtains the measurement dimension alpha of the oil window wrap angle of the rotor of the plunger pump0；
The measured size of the oil window wrap angle can be calculated by the following formula:
Figure BDA00031407432300000613
wherein alpha is0Is the measuring size of the wrap angle of the oil window,
Figure BDA0003140743230000071
is the measurement size of the outer diameter of the oil window hole,
Figure BDA0003140743230000072
is the measured dimension of the inner diameter of the oil window aperture, and l is the measured dimension of the oil window width.
In the judging step, when the measured size of the oil window wrap angle and the required size of the oil window wrap angle are simultaneously in the preset error range, the plunger pump rotor is qualified.
Example two
As shown in FIG. 1 and FIG. 4, inIn the embodiment, the separating force of the oil distribution window and the sealing belt oil film to the rotor is calculated according to the measuring size of the wrap angle of the oil window,
Figure BDA00031407432300000718
in order to realize the actual wrap angle of the oil distribution disc, when the rotor and the oil distribution disc work, the actual wrap angle of the sealing belt, the number Z of the plungers, the spacing angle alpha of the plunger holes of the rotor and the wrap angle alpha of an oil window0In connection with this, the present invention is,
when there is a
Figure BDA0003140743230000073
When the (Z-1) plungers are in the oil discharge area, the actual wrap angle of the oil seal belt
Figure BDA0003140743230000074
Comprises the following steps:
Figure BDA0003140743230000075
when there is a
Figure BDA0003140743230000076
When the (Z-1) plungers are in the oil discharge area, the actual wrap angle of the oil seal belt
Figure BDA0003140743230000077
Comprises the following steps:
Figure BDA0003140743230000078
on average have
Figure BDA0003140743230000079
Average wrap angle of plunger in oil discharge area
Figure BDA00031407432300000710
Comprises the following steps:
Figure BDA00031407432300000711
thereby accurately calculating the separating force of the oil distribution window and the sealing belt oil film to the rotor
Figure BDA00031407432300000712
Wherein p isfIs a separating force, PyIs the pressing force, psi is the pressing coefficient,
Figure BDA00031407432300000713
is the average wrap angle, Z is the number of plungers, alpha is the rotor plunger hole spacing angle,
Figure BDA00031407432300000714
is the measurement size of the diameter of the outer sealing belt,
Figure BDA00031407432300000715
is the measurement size of the outer diameter of the oil window hole,
Figure BDA00031407432300000716
is the measured size of the inner diameter of the oil window hole,
Figure BDA00031407432300000717
is the measurement of the diameter of the inner sealing band, pbIs the oil window oil pressure.
While the pressing force PyIndependent of the average actual wrap angle, the force balance equation P of the friction pair of the rotor and the oil distribution disc can be accurately calculatedf＝(1-ψ)Py。
Therefore, the measuring size of the oil window wrap angle of the plunger pump rotor can be obtained according to the measuring sizes of the outer diameter of the oil window hole, the inner diameter of the oil window hole and the width of the oil window;
in the judging step, when the measuring size of the oil window wrap angle and the required size of the oil window wrap angle are simultaneously within the preset error range, the stress of the rotor can be balanced, the abnormal abrasion of the oil distribution disc and the rotor is avoided, the performance of the hydraulic pump is further improved, and the qualification of the rotor of the plunger pump is judged.
EXAMPLE III
Referring to fig. 1 and fig. 2, the difference between the present embodiment and the second embodiment is that the total separation torque of the rotor and the oil distribution disc friction pair is calculated according to the measured size of the oil window wrap angle. Wherein, the separating moment arm oc of the oil distribution disc2Comprises the following steps:
Figure BDA0003140743230000081
wherein, oc2Is a moment arm of separating moment, wherein OC2Is a moment arm of separating moment, Pf1Indicates the outer sealing tape separating force, Pf2Denotes the inner seal band separation force, pf3Indicating the window separating force, R1Denotes the outer sealing band radius, R2Indicates the outer diameter r of the oil drainage window3Denotes the inner diameter of the oil drain window, R4Denotes the radius of the sealing band, MfIs the total separating moment;
can accurately calculate the total separation moment Mf＝Pf*oc2And a pressing moment MyIndependent of the average actual wrap angle, the moment balance equation M of the friction pair of the rotor and the oil distribution disc can be accurately calculatedf＝(1-K)My(ii) a K is the moment coefficient, MyIs the tightening torque.
In the judging step, when the total separating moment simultaneously meets a moment balance equation of a friction pair of the rotor and the oil distribution disc, the rotor is balanced by the moment, the axial stability of the rotor is improved, the rotor is prevented from toppling and eccentric wear, the efficiency, the service life and the reliability of the hydraulic pump are further improved, and the qualification of the rotor of the plunger pump is judged.
In another embodiment, referring to FIGS. 1, 2, and 5, the rotor oil window wrap angle α is accurately measured and calculated0The oil distribution disc transition zone interval angle beta can be accurately calculated1The spacing angle is equal to the oil window wrap angle alpha0The sum of the angle of compression Δ β 1, i.e. β 1 ═ α0+ Δ β 1, when the rotor rotates in the direction ω, the pressure of the enclosed oil in the chamber is from the oil suction pressure p when the plunger chamber is connected from the oil suction area to the front of the oil discharge window0Pre-pressing to the pressure p of the oil discharge area after passing through a compression angle delta beta 1bAnd the oil discharge area is just connected, so that pressure impact cannot be generated. Similarly, when the rotor rotates in the direction opposite to the rotation direction omega, the plunger cavity is communicated with the front of the oil suction window from the oil discharge area, and the pressure of the enclosed oil in the cavity is communicated with the oil discharge pressure pbAfter passing through a compression angle delta beta 1, the pre-pressure is reduced to the pressure p of the oil absorption area0The rotor oil window wrap angle alpha is accurately calculated by accurately calculating the rotor oil window wrap angle alpha, pressure impact can not be generated, and the pressure impact directly generates noise and vibration phenomena to influence the output quality of the plunger pump1The interval angle beta 1 of the transition area can be accurately determined, so that pressure impact can be effectively avoided, the output flow pulsation quality of the hydraulic pump is improved, noise and vibration phenomena are reduced and even avoided, the output pressure pulsation of the hydraulic pump is reduced, and the service life of the hydraulic pump is further prolonged.
In the description herein, reference to the description of the terms "one embodiment/mode," "some embodiments/modes," "example," "specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment/mode or example is included in at least one embodiment/mode or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to be the same embodiment/mode or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments/modes or examples. Furthermore, the various embodiments/aspects or examples and features of the various embodiments/aspects or examples described in this specification can be combined and combined by one skilled in the art without conflicting therewith.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
It will be understood by those skilled in the art that the foregoing embodiments are merely for clarity of illustration of the disclosure and are not intended to limit the scope of the disclosure. Other variations or modifications may occur to those skilled in the art, based on the foregoing disclosure, and are still within the scope of the present disclosure.

Claims (9)

1. A plunger pump rotor oil window wrap angle detection method is characterized by comprising the following steps:
obtaining the required size of the outer diameter of an oil window hole of a plunger pump rotor, the required size of the inner diameter of the oil window hole and the required size of a wrap angle of the oil window,
calculating the required size of the oil window width according to the required size of the outer diameter of the oil window hole, the required size of the inner diameter of the oil window hole and the required size of the wrap angle of the oil window;
after the oil window hole of the plunger pump rotor is processed, detecting the measuring size of the width of the oil window of the plunger pump rotor;
and (3) judging: when the measuring size of the oil window width and the required size of the oil window width are within the preset error range, the plunger pump rotor is qualified.
2. The plunger pump rotor oil window wrap angle detecting method as recited in claim 1, wherein the required dimension of the oil window width is calculated by the following formula;
Figure FDA0003140743220000011
wherein, alpha'0Is the required size of the oil window wrap angle,
Figure FDA0003140743220000012
is the required size of the outer diameter of the oil window hole,
Figure FDA0003140743220000013
is the required size of the inner diameter of the oil window hole, and L' is the oil window widthThe required size of (2).
3. The plunger pump rotor oil window wrap angle detection method of claim 1, characterized in that: the measuring size of the outer diameter of the oil window hole and the measuring size of the inner diameter of the oil window hole are also obtained, and the measuring size of the wrap angle of the oil window of the rotor of the plunger pump is obtained according to the measuring size of the outer diameter of the oil window hole, the measuring size of the inner diameter of the oil window hole and the measuring size of the width of the oil window;
in the judging step, when the measured size of the oil window wrap angle is within the preset error range of the required size of the oil window wrap angle, the plunger pump rotor is qualified.
4. The plunger pump rotor oil window wrap angle detection method of claim 3, wherein the measured dimension of the oil window wrap angle is calculated by the following formula:
Figure FDA0003140743220000014
wherein alpha is0Is the measuring size of the wrap angle of the oil window,
Figure FDA0003140743220000015
is the measurement size of the outer diameter of the oil window hole,
Figure FDA0003140743220000016
is the measured dimension of the inner diameter of the oil window aperture, and L is the measured dimension of the oil window width.
5. The plunger pump rotor oil window wrap angle detection method of claim 3, characterized in that: calculating the separating force of the oil distribution window and the sealing belt oil film to the rotor according to the measuring size of the wrap angle of the oil window;
in the judging step, when the separating force of the rotor meets the force balance equation of the friction pair of the rotor and the oil distribution disc, the rotor of the plunger pump is qualified.
6. The plunger pump rotor oil window wrap angle detection method of claim 5, characterized in that: the force balance equation is such that,
Pf＝(1-ψ)Py
Figure FDA0003140743220000021
Figure FDA0003140743220000022
wherein, PfIs a separating force, PyIs the pressing force, psi is the pressing coefficient,
Figure FDA0003140743220000023
is the average wrap angle, Z is the number of plungers, alpha is the rotor plunger hole pitch angle, alpha0Is the measuring size of the wrap angle of the oil window,
Figure FDA0003140743220000024
is the measurement size of the diameter of the outer sealing belt,
Figure FDA0003140743220000025
is the measurement size of the outer diameter of the oil window hole,
Figure FDA0003140743220000026
is the measured size of the inner diameter of the oil window hole,
Figure FDA0003140743220000027
is the measurement of the diameter of the inner sealing band, pbIs the oil window oil pressure.
7. The plunger pump rotor oil window wrap angle detection method of claim 6, characterized in that, the total separation torque of the rotor and the oil distribution disc friction pair is calculated according to the measurement size of the oil window wrap angle;
in the judging step, when the total separating moment meets a moment balance equation of a friction pair of the rotor and the oil distribution disc, the rotor of the plunger pump is qualified.
8. The plunger pump rotor oil window wrap angle detection method of claim 7, wherein the total separating torque is calculated by the following equation system:
Figure FDA0003140743220000028
Mf＝Pf*oc2
wherein, oc2Is a moment arm of separating moment, Pf1Indicates the outer sealing tape separating force, Pf2Indicating the inner sealing band separating force, Pf3Indicating the window separating force, R1Denotes the outer sealing band radius, R2Denotes the outer diameter of the oil drainage window, R3Denotes the inner diameter of the oil drain window, R4Denotes the radius of the sealing band, MfIs the total separating moment;
the moment balance equation of the rotor and the oil distribution disc friction pair is as follows:
Mf＝(1-K)My
where K is the moment coefficient, MyIs the tightening torque.
9. The method for detecting the oil window wrap angle of a plunger pump rotor as recited in claim 3, wherein the measured dimension of the outer diameter of the oil window hole, the measured dimension of the inner diameter of the oil window hole, and the measured dimension of the width of the oil window are measured by vernier calipers.
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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN85202466U (en) * 1985-06-22 1986-04-16 广东机械学院 Model zb port mating parts for hydraulic pump which is durable and efficient
CN1074019A (en) * 1991-12-30 1993-07-07 甘肃工业大学 The assignment method of low-noise axial plunger pump and port plate structure
CN1544813A (en) * 2003-11-12 2004-11-10 浙江大学 Bubble evolution proof plunger pump port plate
CN2672320Y (en) * 2003-11-12 2005-01-19 浙江大学 Asymmetric damping slot plunger pump flow distribution disk
CN101694211A (en) * 2009-10-16 2010-04-14 华中科技大学 Port plate for plunger pump
CN101892978A (en) * 2010-07-28 2010-11-24 北京航空航天大学 Valve plate structure for plunger pump
CN204961189U (en) * 2015-10-09 2016-01-13 启东市申力高压油泵厂 Axial plunger pump

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN85202466U (en) * 1985-06-22 1986-04-16 广东机械学院 Model zb port mating parts for hydraulic pump which is durable and efficient
CN1074019A (en) * 1991-12-30 1993-07-07 甘肃工业大学 The assignment method of low-noise axial plunger pump and port plate structure
CN1544813A (en) * 2003-11-12 2004-11-10 浙江大学 Bubble evolution proof plunger pump port plate
CN2672320Y (en) * 2003-11-12 2005-01-19 浙江大学 Asymmetric damping slot plunger pump flow distribution disk
CN101694211A (en) * 2009-10-16 2010-04-14 华中科技大学 Port plate for plunger pump
CN101892978A (en) * 2010-07-28 2010-11-24 北京航空航天大学 Valve plate structure for plunger pump
CN204961189U (en) * 2015-10-09 2016-01-13 启东市申力高压油泵厂 Axial plunger pump

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