CN103808421B - A kind of cylinder cap thermometric armoured thermocouple assembly and making and installation method - Google Patents
A kind of cylinder cap thermometric armoured thermocouple assembly and making and installation method Download PDFInfo
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- CN103808421B CN103808421B CN201410028721.3A CN201410028721A CN103808421B CN 103808421 B CN103808421 B CN 103808421B CN 201410028721 A CN201410028721 A CN 201410028721A CN 103808421 B CN103808421 B CN 103808421B
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- clamp nut
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- copper bush
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Abstract
A kind of cylinder cap thermometric is made and installation method of armoured thermocouple assembly, armoured thermocouple assembly wherein comprises armoured thermocouple (1), armoured thermocouple (1) thermoelectricity is extremely arranged in the thermometer hole (9) of engine cylinder cover, armoured thermocouple (1) thermoelectricity is extremely fitted with copper bush (2), copper bush (2) is logical stem body, the internal diameter of copper bush (2) coordinates with armoured thermocouple (1) thermode splaying, and the external diameter of copper bush (2) coordinates with thermometer hole (9) diametric clearance of engine cylinder cover. Make and installation method, the thermoelectricity that utilizes open flume type clamp nut (4) and clamp nut (5) that copper bush (2) is assemblied in to armoured thermocouple (1) is extreme, finally this armoured thermocouple assembly is extremely inserted in the thermometer hole (9) of engine cylinder cover from thermoelectricity. Ensure armoured thermocouple (1) point position uniformity, and with low cost.
Description
Technical field
The present invention relates to a kind of engine cylinder cover thermometric armoured thermocouple, more particularly relate to a kind of cylinder cap thermometric armoured thermocouple assembly and make and installation method, belong to Engine Block Test technical field.
Background technology
When engine operation, fuel burns in cylinder, produces a large amount of heat energy, and wherein a part of heat energy is absorbed by cylinder cap, and cylinder cap temperature raises, and at this moment needs recirculated water to be undertaken cooling by cylinder cover water jacket; Due to engine cylinder cover structure complexity, and the ridge area cooling condition of cylinder cap upper air valve periphery is the harshest, and cylinder cap cracking easily occurs, so mainly with being concrete temperature measurement location herein. Causing the reason of cylinder cap cracking is that maximum operating temperature condition is inadequate on the one hand, is because temperature cycle changes the fatigue producing on the other hand, and these thermic loads that are referred to as cylinder cap lost efficacy; Therefore need cylinder cap ridge area temperature to measure, to realize the thermic load evaluation to cylinder cap.
At present the temp measuring method in cylinder cap temperature field is mainly to cover parallel base plate direction punching at engine cylinder, utilizes armoured thermocouple to carry out cylinder cap thermometric, and specifically referring to Fig. 1, armoured thermocouple 1 thermoelectricity is extremely arranged in the thermometer hole 9 of engine cylinder cover to realize thermometric. But, this kind of temp measuring method has following defect: one, due to the restriction of thermometer hole 9 level of processing, make thermometer hole 9 diameters can not be less than 2mm, the armoured thermocouple 1 that diameter is 2mm if adopt coordinates while installation, because thermocouple is to be made by the thermocouple wire of two kinds of metal materials, two kinds of metal solder ends are that thermoelectricity is extreme, in the time that the installation of TC is in armouring, the extreme armouring that this puts relative 2mm diameter of thermoelectricity accurately temperature-sensitive point is indefinite, so there is the extreme indefinite problem in actual temperature zone of thermoelectricity in armoured thermocouple 1 itself. For example, if when the thinner armoured thermocouple 1 of two employings is installed, its diameter is 1mm, exists and works poor between armoured thermocouple 1 and thermometer hole 9, produces the inconsistent problem in the armoured thermocouple extreme temperature-sensitive of 1 thermoelectricity position. The defect of above two aspects brings the deviation of the above point position of 1mm all can to cylinder cap thermometric, according to engine cylinder cover maximum temperature gradient, can make cylinder cap temperature-measuring results maximum have the uniformity deviation of 20 DEG C; Therefore, need a kind of simple and practical engine cylinder cover thermometric scheme.
Summary of the invention
The object of the invention is to for existing cylinder cap temp measuring method make processing thermometer hole large, make conventional armoured thermocouple occur the inconsistent problem of measuring point, provide a kind of cylinder cap thermometric armoured thermocouple assembly to make and installation method.
For achieving the above object, technical solution of the present invention is: a kind of cylinder cap thermometric is made and installation method of armoured thermocouple assembly, wherein comprise armoured thermocouple, described armoured thermocouple thermoelectricity is extremely arranged in the thermometer hole of engine cylinder cover, described armoured thermocouple thermoelectricity is extremely fitted with copper bush, described copper bush is logical stem body, the internal diameter of copper bush coordinates with armoured thermocouple thermode splaying, the external diameter of copper bush coordinates with the thermometer hole diametric clearance of engine cylinder cover, chamfering is arranged at described copper bush edge, the thermoelectricity that utilizes open flume type clamp nut and clamp nut that copper bush is assemblied in to armoured thermocouple is extreme, specifically comprise the following steps:
Step 1, select open flume type clamp nut and clamp nut according to the length of copper bush and chamfer angle, the length of copper bush is matched with the effective installation dimension between open flume type clamp nut and clamp nut, chamfer angle matches with the cone angle face between open flume type clamp nut and clamp nut, and the through hole of clamp nut inside and the notch of open flume type clamp nut are matched with armoured thermocouple diameter respectively;
Step 2, copper bush is enclosed within on armoured thermocouple, and makes copper bush be arranged on the position apart from the extremely about 3mm of armoured thermocouple thermoelectricity;
Step 3, between the pigtail splice end of copper bush and armoured thermocouple along the notch of open flume type clamp nut, put open flume type clamp nut;
Step 4, armoured thermocouple is penetrated in clamp nut interior bone, make copper bush between clamp nut and open flume type clamp nut;
Step 5, will between clamp nut and open flume type clamp nut, pass through threaded engagement, copper bush is clipped between the two, further tightening clamp nut makes it coordinate with open flume type clamp nut again, utilize the chamfering of copper bush to match with the cone angle face between open flume type clamp nut and clamp nut, copper bush is pressed on to armoured thermocouple thermoelectricity extreme;
Step 6, unclamp coordinating between clamp nut and open flume type clamp nut, extremely exit clamp nut from armoured thermocouple thermoelectricity, open flume type clamp nut takes off from armoured thermocouple by the notch on it, and copper bush installs, and this armoured thermocouple assembly completes;
Step 7, finally this armoured thermocouple assembly is extremely inserted in the thermometer hole of engine cylinder cover to this armoured thermocouple assembly installation from thermoelectricity.
Described chamfer angle is 56 °.
Described copper bush length is 3mm.
Compared with prior art, the invention has the beneficial effects as follows:
1, modern design, simple in structure, ensure armoured thermocouple point position uniformity, and with low cost. In the present invention, armoured thermocouple thermoelectricity is extremely fitted with copper bush, the internal diameter of copper bush is coordinated with armoured thermocouple thermode splaying, the external diameter of copper bush coordinates with the thermometer hole diametric clearance of engine cylinder cover, when work, avoid armoured thermocouple to occur the inconsistent problem of measuring point, improved the measurement effect of cylinder cap temp measuring method; And existing market armoured thermocouple product is not proposed to too high requirement, ensured that the cylinder cap exemplar of processing can use in the past, make cost of manufacture cheap, saved production cost.
2, a kind of cylinder cap thermometric in the present invention is made and installation method of armoured thermocouple assembly, the thermoelectricity that utilizes open flume type clamp nut 4 and clamp nut 5 that copper bush 2 is assemblied in to armoured thermocouple 1 is extreme, ensure under very low manufacturing condition repeatability to install, ensured that thus this cylinder cap thermometric armoured thermocouple assembly can implement.
Brief description of the drawings
Fig. 1 is existing engine cylinder cover thermometric mode schematic diagram.
Fig. 2 is structural representation of the present invention.
Fig. 3 is copper bush structural representation in the present invention.
Fig. 4 is step 2 fabrication and installation schematic diagram in the present invention.
Fig. 5 is step 3 fabrication and installation schematic diagram in the present invention.
Fig. 6 is step 4 fabrication and installation schematic diagram in the present invention.
Fig. 7 is step 5 fabrication and installation schematic diagram in the present invention.
Fig. 8 is step 6 fabrication and installation schematic diagram in the present invention.
In figure: armoured thermocouple 1, copper bush 2, chamfering 3, open flume type clamp nut 4, clamp nut 5, cone angle face 6, pigtail splice end 7, extension lead 8, thermometer hole 9.
Detailed description of the invention
Below in conjunction with brief description of the drawings and detailed description of the invention, the present invention is described in further detail.
Referring to Fig. 2-Fig. 4, a kind of cylinder cap thermometric is made and installation method of armoured thermocouple assembly, armoured thermocouple assembly wherein comprises armoured thermocouple 1, described armoured thermocouple 1 is normally encapsulated in thermocouple in the metallic sheath that entire body diameter is constant and is made, and metallic sheath typically has a diameter from Φ 0.5-Φ 3mm; Thermocouple is by the conductive material of two kinds of unlike materials, the temperature transducer that utilizes pyroelectric effect principle, be made. Armoured thermocouple 1 comprises thermoelectricity extremely and pigtail splice end 7, and described thermoelectricity is extremely sensor head, is used for measuring temperature; Pigtail splice end 7 is sensor afterbody. Metallic sheath length is pressed measurement demand can be customized, and as 10-500mm, thermocouple length is pressed metallic sheath length and made, pigtail splice end welding extension lead 8; Pigtail splice end 7 is considered wiring and reliably protecting, conventionally the diameter at this place is made larger.
Referring to Fig. 2-Fig. 4, described armoured thermocouple 1 thermoelectricity is extremely arranged in the thermometer hole 9 of engine cylinder cover, and armoured thermocouple 1 thermoelectricity is extremely fitted with copper bush 2. Described copper bush 2 is logical stem body, and the internal diameter of copper bush 2 coordinates with armoured thermocouple 1 thermode splaying, the general large 0.1mm of specific heat electrode tip diameter; The external diameter of copper bush 2 coordinates with the thermometer hole of engine cylinder cover 9 diametric clearance, and gap value is not more than Φ 0.1mm, and the cooperation that guarantee copper bush 2 external diameters meet cylinder cap thermometer hole 9 diameters requires. Chamfering 3 is arranged to so that its fabrication and installation in described copper bush 2 edges; In this detailed description of the invention, chamfering 3 angles are 56 °. Copper bush 2 length described in this detailed description of the invention are 3mm.
A kind of cylinder cap thermometric armoured thermocouple assembly in the present invention, on common armoured thermocouple 1, install copper bush 2 additional, ensured that armoured thermocouple assembly matches with cylinder cap measuring point hole, solved large, the common armoured thermocouple extreme temperature-sensitive of 1 focus position, cylinder cap measuring point hole inconsistent, give cylinder cap thermometric bring the problems such as deviation. Because cylinder cap thermometer hole 9 diameters are difficult for processing too small, generally be processed as φ 2mm, now analyze with φ 2mm thermometer hole 9, φ 1mm armoured thermocouple 1, copper bush 2 and thermometer hole 9 fit clearance 0.1mm, armoured thermocouple 1 thermode end position deviation 0.15mm, calculate by 20 DEG C/mm of maximum cylinder cap thermograde, thermometric uniformity deviation is less than 5 DEG C, has greatly improved cylinder cap thermometric accuracy.
Referring to Fig. 4-Fig. 8, a kind of cylinder cap thermometric is made and installation method of armoured thermocouple assembly, and the thermoelectricity that utilizes open flume type clamp nut 4 and clamp nut 5 that copper bush 2 is assemblied in to armoured thermocouple 1 is extreme, specifically comprises the following steps:
Step 1, according to the length of copper bush 2 and chamfering 3 angle Selection open flume type clamp nut 4 and clamp nuts 5, the length of copper bush 2 is matched with the effective installation dimension between open flume type clamp nut 4 and clamp nut 5, effective installation dimension between open flume type clamp nut 4 and clamp nut 5 refers to the effective range of matching thread between open flume type clamp nut 4 and clamp nut 5, and in this detailed description of the invention, copper bush 2 length are 3mm; Chamfering 3 angles match with the cone angle face 6 between open flume type clamp nut 4 and clamp nut 5, generally chamfering 3 angles are less 2 ° than cone angle face 6 angles, cone angle face 6 angles herein refer to the conical surface angle that open flume type clamp nut 4 and clamp nut 5 coordinate copper bush 2 fillet surfaces, and in this detailed description of the invention, cone angle face 6 angles are that 60 °, chamfering 3 angles are 56 °. And, need to make the through hole of clamp nut 5 inside and the notch of open flume type clamp nut 4 coordinate with armoured thermocouple 1 diametric clearance respectively.
Step 2, specifically referring to Fig. 4, copper bush 2 is enclosed within on armoured thermocouple 1, because there is gap between copper bush 2 and armoured thermocouple 1, copper bush 2 slides on armoured thermocouple 1, therefore make copper bush 2 be arranged on the position apart from the extremely about 3mm of armoured thermocouple 1 thermoelectricity, so that next step fabrication and installation.
Step 3, specifically referring to Fig. 5, between copper bush 2 and the pigtail splice end 7 of armoured thermocouple 1, along the notch of open flume type clamp nut 4, put open flume type clamp nut 4.
Step 4, specifically referring to Fig. 6, armoured thermocouple 1 is penetrated in clamp nut 5 interior bone, in Fig. 6, arrow is depicted as clamp nut 5 and packs direction into; And make copper bush 2 between clamp nut 5 and open flume type clamp nut 4.
Step 5, specifically referring to Fig. 7, to between clamp nut 5 and open flume type clamp nut 4, pass through threaded engagement, copper bush 2 is clipped between the two, further tightening clamp nut 5 makes it coordinate with open flume type clamp nut 4 again, utilize the chamfering 3 of copper bush 2 to match with the cone angle face 6 between open flume type clamp nut 4 and clamp nut 5, copper bush 2 is pressed on to armoured thermocouple 1 thermoelectricity extreme.
Step 6, specifically referring to Fig. 8, unclamp coordinating between clamp nut 5 and open flume type clamp nut 4, extremely exit clamp nut 5 from armoured thermocouple 1 thermoelectricity, in Fig. 8, left-hand arrow is depicted as and exits clamp nut 5 directions; Open flume type clamp nut 4 takes off from armoured thermocouple 1 by the notch on it, and in Fig. 8, direction is taken off for open flume type clamp nut 4 obliquely in the right side; Now copper bush 2 installs, and this armoured thermocouple assembly completes.
Step 7, finally this armoured thermocouple assembly is extremely inserted in the thermometer hole 9 of engine cylinder cover to this armoured thermocouple assembly installation from thermoelectricity.
A kind of cylinder cap thermometric in the present invention is made and installation method of armoured thermocouple assembly, the thermoelectricity that utilizes open flume type clamp nut 4 and clamp nut 5 that copper bush 2 is assemblied in to armoured thermocouple 1 is extreme, make under very low production technology cost condition, can ensure that armoured thermocouple 1 can repeatability install, improve the armoured thermocouple extreme measuring point of 1 thermoelectricity installation site uniformity.
Above content is in conjunction with concrete preferred embodiment further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations. For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, said structure all should be considered as belonging to protection scope of the present invention.
Claims (3)
1. a cylinder cap thermometric is made and installation method of armoured thermocouple assembly, armoured thermocouple assembly wherein comprises armoured thermocouple (1), described armoured thermocouple (1) thermoelectricity is extremely arranged in the thermometer hole (9) of engine cylinder cover, described armoured thermocouple (1) thermoelectricity is extremely fitted with copper bush (2), described copper bush (2) is logical stem body, the internal diameter of copper bush (2) coordinates with armoured thermocouple (1) thermode splaying, the external diameter of copper bush (2) coordinates with thermometer hole (9) diametric clearance of engine cylinder cover, chamfering (3) is arranged at described copper bush (2) edge, it is characterized in that: the thermoelectricity that utilizes open flume type clamp nut (4) and clamp nut (5) that copper bush (2) is assemblied in to armoured thermocouple (1) is extreme, specifically comprise the following steps:
Step 1, according to the length of copper bush (2) and chamfering (3) angle Selection open flume type clamp nut (4) and clamp nut (5), the length of copper bush (2) is matched with the effective installation dimension between open flume type clamp nut (4) and clamp nut (5), chamfering (3) angle matches with the cone angle face (6) between open flume type clamp nut (4) and clamp nut (5), and the inner through hole of clamp nut (5) and the notch of open flume type clamp nut (4) are matched with armoured thermocouple (1) diameter respectively;
Step 2, that copper bush (2) is enclosed within to armoured thermocouple (1) is upper, and makes copper bush (2) be arranged on the position apart from the extremely about 3mm of armoured thermocouple (1) thermoelectricity;
Step 3, between copper bush (2) and the pigtail splice end (7) of armoured thermocouple (1) along the notch of open flume type clamp nut (4), put open flume type clamp nut (4);
Step 4, armoured thermocouple (1) is penetrated in clamp nut (5) interior bone, copper bush (2) is positioned between clamp nut (5) and open flume type clamp nut (4);
Step 5, will between clamp nut (5) and open flume type clamp nut (4), pass through threaded engagement, copper bush (2) is clipped between the two, further tightening clamp nut (5) makes it coordinate with open flume type clamp nut (4) again, utilize the chamfering (3) of copper bush (2) to match with the cone angle face (6) between open flume type clamp nut (4) and clamp nut (5), copper bush (2) is pressed on to armoured thermocouple (1) thermoelectricity extreme;
Step 6, unclamp coordinating between clamp nut (5) and open flume type clamp nut (4), extremely exit clamp nut (5) from armoured thermocouple (1) thermoelectricity, open flume type clamp nut (4) takes off from armoured thermocouple (1) by the notch on it, copper bush (2) installs, and this armoured thermocouple assembly completes;
Step 7, finally this armoured thermocouple assembly is extremely inserted in the thermometer hole (9) of engine cylinder cover to this armoured thermocouple assembly installation from thermoelectricity.
2. a kind of cylinder cap thermometric according to claim 1 is made and installation method of armoured thermocouple assembly, it is characterized in that: described chamfering (3) angle is 56 °.
3. a kind of cylinder cap thermometric according to claim 1 is made and installation method of armoured thermocouple assembly, it is characterized in that: described copper bush (2) length is 3mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410028721.3A CN103808421B (en) | 2014-01-22 | 2014-01-22 | A kind of cylinder cap thermometric armoured thermocouple assembly and making and installation method |
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| CN201410028721.3A CN103808421B (en) | 2014-01-22 | 2014-01-22 | A kind of cylinder cap thermometric armoured thermocouple assembly and making and installation method |
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| CN103808421A CN103808421A (en) | 2014-05-21 |
| CN103808421B true CN103808421B (en) | 2016-05-11 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| EP3239506B1 (en) * | 2014-12-24 | 2020-06-10 | Keihin Corporation | Internal combustion engine control device |
| CN113566993A (en) * | 2020-04-28 | 2021-10-29 | 中国航发商用航空发动机有限责任公司 | Engine temperature measuring device and heat insulation lining thereof |
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| CN2485639Y (en) * | 2000-07-28 | 2002-04-10 | 武汉理工大学 | Temperature sensor for engine cylinder inner wall |
| CN101476944A (en) * | 2008-01-03 | 2009-07-08 | 富良 | Dynamic overshooting fast thermocouple |
| CN102156003A (en) * | 2011-02-25 | 2011-08-17 | 武汉武钢维苏威高级陶瓷有限公司 | Thermocouple assembly and manufacturing process |
| CN202041310U (en) * | 2011-01-30 | 2011-11-16 | 中国航空动力机械研究所 | Sealing device for thermocouple |
| CN202511885U (en) * | 2011-12-29 | 2012-10-31 | 中航(苏州)雷达与电子技术有限公司 | Butt joint structure of thermocouple type temperature sensor bush and nozzle |
| CN203758627U (en) * | 2014-01-22 | 2014-08-06 | 东风商用车有限公司 | Armored thermocouple assembly for cylinder cover temperature measurement |
Family Cites Families (3)
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| CN1192222C (en) * | 1999-10-13 | 2005-03-09 | 德士古发展公司 | Sapphire reinforced thermocouple protection tube |
| EP1488203A4 (en) * | 2002-03-18 | 2011-06-29 | Texaco Development Corp | Protective cap for a thermocouple in a gasifier |
| JP2005205436A (en) * | 2004-01-21 | 2005-08-04 | Yamaha Motor Co Ltd | Temperature sensor for casting machine and casting machine |
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- 2014-01-22 CN CN201410028721.3A patent/CN103808421B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2485639Y (en) * | 2000-07-28 | 2002-04-10 | 武汉理工大学 | Temperature sensor for engine cylinder inner wall |
| CN101476944A (en) * | 2008-01-03 | 2009-07-08 | 富良 | Dynamic overshooting fast thermocouple |
| CN202041310U (en) * | 2011-01-30 | 2011-11-16 | 中国航空动力机械研究所 | Sealing device for thermocouple |
| CN102156003A (en) * | 2011-02-25 | 2011-08-17 | 武汉武钢维苏威高级陶瓷有限公司 | Thermocouple assembly and manufacturing process |
| CN202511885U (en) * | 2011-12-29 | 2012-10-31 | 中航(苏州)雷达与电子技术有限公司 | Butt joint structure of thermocouple type temperature sensor bush and nozzle |
| CN203758627U (en) * | 2014-01-22 | 2014-08-06 | 东风商用车有限公司 | Armored thermocouple assembly for cylinder cover temperature measurement |
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