CN117197217A - Three-dimensional model-based cylindrical intersecting hole flow area calculation method - Google Patents
Three-dimensional model-based cylindrical intersecting hole flow area calculation method Download PDFInfo
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Abstract
The invention belongs to the technical field of calculation and analysis of the flow area between intersecting liquid paths, and discloses a calculation method of the flow area of a cylindrical intersecting hole based on a three-dimensional model, which comprises a calculation step when only 1 intersecting line exists, a calculation step when 2 intersecting lines exist, a calculation step when 3 intersecting lines exist, a calculation step when 4 intersecting lines exist and a calculation step when more than 4 intersecting lines exist. The method comprises the steps of utilizing an informatization means to assist engineering technicians to automatically obtain the areas of all cylindrical intersecting holes in the three-dimensional model, combining various attribute characteristics and boundary line relations in the three-dimensional model, accurately calculating the overcurrent area, and compared with the traditional manual calculation mode, calculating the overcurrent area of the intersecting holes more comprehensively, more accurately and more quickly, fully considering various intersecting conditions, and giving out a calculation method one by one, thereby being applicable to calculation scenes of the overcurrent area of various intersecting holes, and further being capable of improving the application range.
Description
Technical Field
The invention belongs to the technical field of calculation and analysis of the flow area between intersecting liquid paths, and particularly relates to a calculation method of the flow area of a cylindrical intersecting hole based on a three-dimensional model.
Background
When the shell and the cylinder of the actuator are designed, the overflow area between the intersected oil ways is ensured to be in a reasonable range, the oil ways are easy to be blocked or the local pressure is increased suddenly to influence the use function of the oil ways or increase unsafe factors of the oil ways, when the two holes are intersected, the ratio of the overflow area to the cross-sectional area of the smaller hole perpendicular to the axis is not smaller than the recommended value, which defaults to 80 percent, in the prior art, the overflow area is calculated mainly by adopting a manual method, but the calculation efficiency is extremely low by adopting a manual calculation mode, and the phenomenon of calculation errors is easy to occur, so that the calculation method of the overflow area of the cylindrical intersected hole based on the three-dimensional model is provided.
Disclosure of Invention
The invention aims to provide a three-dimensional model-based cylindrical intersecting hole flow area calculation method for solving the problems in the background art.
In order to achieve the above object, the present invention provides the following technical solutions: the calculation method of the cylindrical intersecting hole through-flow area based on the three-dimensional model comprises the steps of calculating when only 1 intersecting line exists, calculating when 2 intersecting lines exist, calculating when 3 intersecting lines exist, calculating when 4 intersecting lines exist and calculating when more than 4 intersecting lines exist;
the calculation steps when only 1 intersecting line are adopted are as follows:
s1: judging whether obvious endpoints exist or not;
s2: when judging that an obvious endpoint exists, taking the endpoint as a starting point A, and when judging that no obvious endpoint exists, taking any point on the intersecting line as the starting point A;
s3: solving three points of a solving point B, C, D, and quartering intersecting lines together with the point A;
s4: and solving a common vertical line l2 of the lines AC and BD, taking l2 as a projection direction, projecting an intersecting line, and solving a projection area to be used as an intersecting hole flow area.
Preferably, the calculation steps when there are 2 intersecting lines are as follows:
a1: respectively solving the midpoints A, B of the 2 intersecting lines;
a2: solving a point C on the straight line l 1 to enable |CA|= |CB|;
a3: judging that the angle ACB=180 degrees or the angle ACB is not equal to 180 degrees;
a3: when the angle acb=180°, taking l 1 as a projection direction, projecting an intersecting line, and solving a projection area to be used as an intersecting hole flow area; when the angle ACB is not equal to 180 degrees, solving an angular bisector l 3 of the angle ACB, taking l 3 as a projection direction, projecting an intersecting line, and solving a projection area to be used as an intersecting hole flow-through area.
Preferably, the calculation steps when there are 3 intersecting lines are as follows:
b1: respectively solving the midpoints A, B, C of the 3 intersecting lines;
b2: solving a common vertical line l4 of the lines AB and AC;
b3: and taking l4 as a projection direction, projecting an intersecting line, and solving a projection area to be used as an intersecting hole flow area.
Preferably, the calculation steps when 4 intersecting lines exist are as follows:
c1: respectively solving midpoints A, B, C, D of the 4 intersecting lines;
c2: solving a common vertical line l5 of the line AC and the BD, and taking l5 as a projection direction to project an intersecting line;
and C3: and solving the projection area to be used as the intersection hole flow area.
Preferably, the calculation steps when more than 4 intersecting lines exist are as follows:
d1: judging whether a hole intersects a step hole at a step or a plurality of holes intersect in the same area;
d2: taking 4 sections with the longest length in the intersecting lines, and respectively solving the midpoints A, B, C, D of the 4 intersecting lines;
d3: and solving a common vertical line l 6 of the lines AC and BD, taking l 6 as a projection direction, projecting an intersecting line, and solving a projection area to be used as an intersecting hole flow area.
The beneficial effects of the invention are as follows:
1. according to the method, through setting the calculation steps of only 1 intersecting line, 2 intersecting lines, 3 intersecting lines, 4 intersecting lines and more than 4 intersecting lines, engineering technicians are assisted by the aid of informatization means, the area of each cylindrical intersecting hole in the three-dimensional model is automatically obtained, and the area of the intersecting hole is accurately calculated by combining various attribute characteristics and boundary line relations in the three-dimensional model.
Drawings
FIG. 1 is a schematic illustration of only 1 intersecting line of the present invention;
FIG. 2 is a schematic view of the present invention with 2 intersecting lines;
FIG. 3 is a schematic view of the present invention with 3 intersecting lines;
FIG. 4 is a schematic view of a structure with 4 intersecting lines according to the present invention;
FIG. 5 is a schematic view of the structure of the present invention with more than 4 intersecting lines.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1 to 5, the embodiment of the invention provides a method for calculating the area of a cylindrical intersecting hole through which a three-dimensional model is based, comprising a calculation step when only 1 intersecting line exists, a calculation step when 2 intersecting lines exist, a calculation step when 3 intersecting lines exist, a calculation step when 4 intersecting lines exist and a calculation step when more than 4 intersecting lines exist;
wherein, the calculation steps when only 1 intersecting line are as follows:
s1: judging whether obvious endpoints exist or not;
s2: when judging that an obvious endpoint exists, taking the endpoint as a starting point A, and when judging that no obvious endpoint exists, taking any point on the intersecting line as the starting point A;
s3: solving three points of a solving point B, C, D, and quartering intersecting lines together with the point A;
s4: and solving a common vertical line l2 of the lines AC and BD, taking l2 as a projection direction, projecting an intersecting line, and solving a projection area to be used as an intersecting hole flow area.
As shown in fig. 2, in one embodiment, the calculation steps for 2 intersecting lines are as follows:
a1: respectively solving the midpoints A, B of the 2 intersecting lines;
a2: solving a point C on the straight line l 1 to enable |CA|= |CB|;
a3: judging that the angle ACB=180 degrees or the angle ACB is not equal to 180 degrees;
a3: when the angle acb=180°, taking l 1 as a projection direction, projecting an intersecting line, and solving a projection area to be used as an intersecting hole flow area; when the angle ACB is not equal to 180 degrees, solving an angular bisector l 3 of the angle ACB, taking l 3 as a projection direction, projecting an intersecting line, and solving a projection area to be used as an intersecting hole flow-through area.
The working principle and beneficial effects of the technical scheme are as follows: under the condition that the intersecting oil way is that the cylindrical surface of one oil way is intersected with the cylindrical surface of the other oil way, the regularly calculated flow area of the two oil ways is 2.24mm 2 When the diameter of the finer oil path in the two oil paths is 1.5mm, the cross section area is 1.77mm 2 The ratio of the flow area to the cross-sectional area was 126.94%.
As shown in fig. 3, in one embodiment, the calculation steps for 3 intersecting lines are as follows:
b1: respectively solving the midpoints A, B, C of the 3 intersecting lines;
b2: solving a common vertical line l4 of the lines AB and AC;
b3: and taking l4 as a projection direction, projecting an intersecting line, and solving a projection area to be used as an intersecting hole flow area.
The working principle and beneficial effects of the technical scheme are as follows:
case one: under the condition that 3 oil ways are intersected in the same area, the two intersected areas are regularly calculated respectively, and if the two oil ways are 4.18mm in the area 2 When in use, the two oil paths are relatively equalThe diameter of the fine oil way is 2.0mm, and the cross section area is 3.14mm 2 The ratio of the flow area to the cross-sectional area was 132.97%;
and a second case: under the condition that 3 oil ways are intersected in the same area, the two intersected areas are regularly calculated respectively, and if the two oil ways are 2.27mm in the area 2 The diameter of the thinner oil way in the two oil ways is 1.5mm, and the cross section area is 1.77mm 2 The ratio of the flow area to the cross-sectional area was 128.18%, note: the 3 oil passages referred to in this case are the same as in case one.
As shown in fig. 4, in one embodiment, the calculation steps for 4 intersecting lines are as follows:
c1: respectively solving midpoints A, B, C, D of the 4 intersecting lines;
c2: solving a common vertical line l5 of the line AC and the BD, and taking l5 as a projection direction to project an intersecting line;
and C3: and solving the projection area to be used as the intersection hole flow area.
As shown in fig. 5, in one embodiment, the calculation steps for more than 4 intersecting lines are as follows:
d1: judging whether a hole intersects a step hole at a step or a plurality of holes intersect in the same area;
d2: taking 4 sections with the longest length in the intersecting lines, and respectively solving the midpoints A, B, C, D of the 4 intersecting lines;
d3: and solving a common vertical line l 6 of the lines AC and BD, taking l 6 as a projection direction, projecting an intersecting line, and solving a projection area to be used as an intersecting hole flow area.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The method is characterized by comprising a calculation step when only 1 intersecting line exists, a calculation step when 2 intersecting lines exist, a calculation step when 3 intersecting lines exist, a calculation step when 4 intersecting lines exist and a calculation step when more than 4 intersecting lines exist;
the calculation steps when only 1 intersecting line are adopted are as follows:
s1: judging whether obvious endpoints exist or not;
s2: when judging that an obvious endpoint exists, taking the endpoint as a starting point A, and when judging that no obvious endpoint exists, taking any point on the intersecting line as the starting point A;
s3: solving three points of a solving point B, C, D, and quartering intersecting lines together with the point A;
s4: and solving a common vertical line l2 of the lines AC and BD, taking l2 as a projection direction, projecting an intersecting line, and solving a projection area to be used as an intersecting hole flow area.
2. The three-dimensional model-based cylindrical intersection hole flow area calculation method according to claim 1, wherein the method comprises the following steps of: the calculation steps when the 2 intersecting lines exist are as follows:
a1: respectively solving the midpoints A, B of the 2 intersecting lines;
a2: solving a point C on the straight line l 1 to enable |CA|= |CB|;
a3: judging that the angle ACB=180 degrees or the angle ACB is not equal to 180 degrees;
a3: when the angle acb=180°, taking l 1 as a projection direction, projecting an intersecting line, and solving a projection area to be used as an intersecting hole flow area; when the angle ACB is not equal to 180 degrees, solving an angular bisector l 3 of the angle ACB, taking l 3 as a projection direction, projecting an intersecting line, and solving a projection area to be used as an intersecting hole flow-through area.
3. The three-dimensional model-based cylindrical intersection hole flow area calculation method according to claim 1, wherein the method comprises the following steps of: the calculation steps when the 3 intersecting lines exist are as follows:
b1: respectively solving the midpoints A, B, C of the 3 intersecting lines;
b2: solving a common vertical line l4 of the lines AB and AC;
b3: and taking l4 as a projection direction, projecting an intersecting line, and solving a projection area to be used as an intersecting hole flow area.
4. The three-dimensional model-based cylindrical intersection hole flow area calculation method according to claim 1, wherein the method comprises the following steps of: the calculation steps when the 4 intersecting lines exist are as follows:
c1: respectively solving midpoints A, B, C, D of the 4 intersecting lines;
c2: solving a common vertical line l5 of the line AC and the BD, and taking l5 as a projection direction to project an intersecting line;
and C3: and solving the projection area to be used as the intersection hole flow area.
5. The three-dimensional model-based cylindrical intersection hole flow area calculation method according to claim 1, wherein the method comprises the following steps of: the calculation steps when more than 4 intersecting lines exist are as follows:
d1: judging whether a hole intersects a step hole at a step or a plurality of holes intersect in the same area;
d2: taking 4 sections with the longest length in the intersecting lines, and respectively solving the midpoints A, B, C, D of the 4 intersecting lines;
d3: and solving a common vertical line l 6 of the lines AC and BD, taking l 6 as a projection direction, projecting an intersecting line, and solving a projection area to be used as an intersecting hole flow area.
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| CN202311232954.0A CN117197217B (en) | 2023-09-22 | 2023-09-22 | Three-dimensional model-based cylindrical intersecting hole flow area calculation method |
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| JPS59153255A (en) * | 1983-02-21 | 1984-09-01 | Hitachi Ltd | Displaying method of partially curved surface |
| US20170197259A1 (en) * | 2014-11-27 | 2017-07-13 | Tungaloy Corporation | Cutting insert having bottom surface with inclined parts and indexable rotary cutting tool |
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2023
- 2023-09-22 CN CN202311232954.0A patent/CN117197217B/en active Active
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| JPS59153255A (en) * | 1983-02-21 | 1984-09-01 | Hitachi Ltd | Displaying method of partially curved surface |
| US20170197259A1 (en) * | 2014-11-27 | 2017-07-13 | Tungaloy Corporation | Cutting insert having bottom surface with inclined parts and indexable rotary cutting tool |
| US20210348585A1 (en) * | 2018-09-13 | 2021-11-11 | 3M Innovative Properties Company | Nozzle with microstructured through-holes |
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| CN114248148A (en) * | 2021-12-21 | 2022-03-29 | 燕山大学 | Optimization method for flow area of V-shaped valve port of multi-way valve |
| CN116451493A (en) * | 2023-04-25 | 2023-07-18 | 浙江大学 | Fluid simulation method for complex structure |
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