CN104122026A - Pressure transducer and pressure system - Google Patents
Pressure transducer and pressure system Download PDFInfo
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- CN104122026A CN104122026A CN201310148877.0A CN201310148877A CN104122026A CN 104122026 A CN104122026 A CN 104122026A CN 201310148877 A CN201310148877 A CN 201310148877A CN 104122026 A CN104122026 A CN 104122026A
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- pressure transducer
- oil duct
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- bottom base
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Abstract
The invention discloses a pressure transducer which comprises a pedestal with a through hole arranged in the central section. Two open ends of the through hole are respectively provided with inlaid sealed glass and covered with a diaphragm. The pedestal, the sealed glass and the diaphragms form a liquid seal chamber. An oiling channel communicated with the liquid seal chamber is arranged on the pedestal. An inlet end of the oiling channel that is communicated with an external oil line is provided with a sealing part. According to the invention, the oiling channel for injecting oil into the liquid seal chamber is arranged on the pedestal. On one hand, the technology of processing the oiling channel on the pedestal is simple and is easier to realize. In addition, after oiling of the liquid seal chamber, it is not necessary to take factors, such as deformation of the oiling channel due to pressing force applied on the oiling channel, into consideration when the sealing part is used to seal an oil inlet of the oiling channel. Thus, problems, such as deformation and rupture of a pipe, oil leakage and the like which are caused when a charging pipe is blocked and pressed flat, in the prior art are eliminated, especially for components of the pressure transducer with the sealing part fixed on the pedestal through a welding technology. By the arrangement mode of the oiling channel, welding reliability and stability of the sealing part can be raised. In addition, the invention also provides a pressure system containing the above pressure transducer.
Description
Technical field
The present invention relates to Pressure Control Technology field, particularly relate to a kind of pressure transducer.The invention still further relates to a kind of pressure system with above-mentioned pressure transducer.
Background technology
Along with the fast development of China's economic construction, relate to the industry such as air conditioner refrigerating, heat pump air conditioner in heat interchange field constantly towards diversification, multi-functional future development.In various heat-exchange apparatus, during due to work, flowing and thering is the medium of pressure, therefore, pressure transducer is vitals indispensable in heat-exchange apparatus.
Pressure transducer be a kind of by medium (all kinds of flowable materials) pressure-acting on core body circuit block, make pressure elements produce distortion, thereby the electric bridge being etched on pressure core body produces corresponding electric signal, then be converted into the Voltage-output signal of standard by modulate circuit.
Please refer to Fig. 1, Fig. 1 is the schematic diagram of a kind of typical pressure transducer partial structurtes in prior art.
Pressure transducer comprises pedestal 1, the opening part of pedestal 1 is embedded with fixing seal glass 2, in seal glass 2, be sealed with guide pin 3, induction chip boarded parts 4 and oil filler pipe 5 simultaneously, another peristome of pedestal is covered by diaphragm 7, itself and seal glass 2, pedestal 1 form fluid-tight chamber, induction chip boarded parts 4 belows are pasted with induction chip 6, and induction chip 6 is connected with guide pin 3 by spun gold 8.
In pressure transducer production run, first operating personnel inject fluid-tight chamber by oil filler pipe 5 by fluid, after having filled, will be by the oil-in plug at end part of oil filler pipe 5, when pressure-acting is to diaphragm, diaphragm is delivered on induction chip 6 by fluid, and induction chip 6 produces distortion, and this distortion is processed, be then converted to the electric signal of standard.Generally take at present following several shutoff mode.
First method, oil filler pipe 5 is flattened, and then carry out, which technique more complicated, in shutoff process, oil filler pipe 5 is prone to Leakage simultaneously, and the welding that leakage of oil causes is insufficient, cause that fluid-tight chamber air-tightness is not good, undercapacity, pressure transducer functional reliability and stability reduce.
The second way is that direct welded seal part is in oil filler pipe 5 ends, in which, must apply in advance certain pressure makes oil filler pipe 5 contact with seal seal, because oil filler pipe 5 is thinner, there is welded gaps in too small seal and the oil filler pipe 5 of easily making of applied pressure in advance, and the insufficient phenomenon of welding occurs; If applied pressure is excessive, easily cause oil filler pipe 5 bendings, affect oil filler pipe 5 and seal welding quality, there is welding insufficient, all can cause fluid-tight chamber air-tightness not good, when serious, will destroy seal glass.
Therefore, how to provide a kind of pressure transducer, in this pressure transducer, oiling passage plugging technique is simple, and shutoff is reliable, is the current technical issues that need to address of those skilled in the art.
Summary of the invention
One object of the present invention aims to provide a kind of pressure transducer, and in this pressure transducer, oiling passage plugging technique is simple, and shutoff is reliable.Another object of the present invention aims to provide a kind of pressure system with above-mentioned pressure transducer.
For achieving the above object, the invention provides a kind of pressure transducer, comprise pedestal, on described pedestal, be provided with through hole, two open ends of described through hole have embedded respectively seal glass and have been coated with diaphragm, and described pedestal, seal glass, diaphragm surround a fluid-tight chamber, are also provided with the oiling passage that is communicated with described fluid-tight chamber, described oiling channel setting is on described pedestal, and the inlet end of the outside oil circuit of described oiling channel connection is provided with seal member.
Preferably, described oiling passage comprises the first oil duct and the second oil duct vertically arranging, and is communicated with described fluid-tight chamber by described the first oil duct.
Preferably, the lower bottom base that described pedestal comprises matrix and coordinates with described upper matrix phase, described through hole comprises the first through hole being arranged on described upper matrix and is arranged at the second through hole on described lower bottom base, described seal glass embeds in described the first through hole, and described membrane covered is in the lower ending opening place of described the second through hole.
Preferably, described the first oil duct and described the second oil duct are located on described upper matrix or described lower bottom base.
Preferably, described the first oil duct is surrounded by the mating surface of described upper matrix and described lower bottom base, and described the second oil duct is located in described upper matrix or described lower bottom base.
Preferably, in the mating surface of described upper matrix and described lower bottom base, at least one is provided with ring groove, and described ring groove and corresponding described through hole form shoulder hole structure, and described the first oil duct is formed at described ring groove and is mated between face.
Preferably, in the mating surface of described upper matrix and described lower bottom base, at least one is provided with the link slot that ring groove and at least one are communicated with described fluid-tight chamber, described ring groove is communicated with described link slot and described the second oil duct, and described the first oil duct is formed between described ring groove, described link slot and mating surface that both are corresponding.
Preferably, in the mating surface of described upper matrix and described lower bottom base, wherein one is provided with the ring groove that leads to described the second oil duct, another one is provided with the link slot that is communicated with described fluid-tight chamber, described link slot is communicated with described ring groove and described fluid-tight chamber, and described the first oil duct is formed between the mating surface of described ring groove, described link slot and both correspondences.
Preferably, the inlet end of described oiling passage is provided with shoulder hole structure, and described seal member is arranged at described shoulder hole step position.
Preferably, on the inner face of described seal glass, be provided with the substrate that induction chip is installed, on described substrate, be provided with the pad that at least one is connected with described induction chip.
Preferably, be also provided with and press-fit the pressure ring of described diaphragm on described pedestal.
Preferably, described upper matrix and described lower bottom base are provided with the groove of placing weld-ring at least one, one-body molded in the sintering process of described upper matrix, described weld-ring, described lower bottom base matrix and described seal glass on described.
Pressure transducer provided by the invention is to complete fluid in the fluid-tight chamber that pedestal, seal glass and diaphragm are surrounded and fill by process oiling passage on pedestal, and after fluid has filled, only the inlet end of oiling passage need to be used seal member sealing can complete the sealing of oiling passage.
Arrange in seal glass with prior art compared with embedded topping up pipe, in the present invention to the oiling channel setting of fluid-tight chamber oiling on pedestal, on pedestal, process oiling via process on the one hand fairly simple, without considering that processing coordinates, the factors such as sintering are installed, more easily realize, and after completing the oiling of fluid-tight chamber, while using the oil-in place of seal member sealed oiling passage, without considering that putting on snap-in force on oiling passage can cause the factors such as oiling channel deformation, while eliminating the shutoff of prior art topping up pipe, flatten and cause body distortion, the problems such as leakage of oil of breaking, especially be to be fixed on the pressure sensor component on pedestal by welding technology for seal member, the set-up mode of the passage of oiling herein can improve the reliability and stability of seal member welding, and sealing mode has been simplified plugging technology greatly, can improve the production efficiency of pressure transducer, reduce its use cost.
One preferred embodiment in, described oiling passage comprises the first oil duct and the second oil duct vertically arranging, and is communicated with described fluid-tight chamber by described the first oil duct; The oiling passageway machining technique of this structure is fairly simple, and in the time using the end of seal member shutoff Vertical Channel, the contrast locating of seal member is more accurate, is conducive to quick and precisely install and improve the reliability of shutoff, improves the stability of pressure transducer work.
One preferred embodiment in, the lower bottom base that described pedestal comprises matrix and coordinates with described upper matrix phase, described through hole comprises the first through hole being arranged on described upper matrix and is arranged at the second through hole on described lower bottom base, described seal glass embeds in described the first through hole, and described membrane covered is in the lower ending opening place of described the second through hole; The upper matrix that in this embodiment, pedestal is set to cooperatively interact and lower bottom base two parts, can further reduce the difficulty of processing the first oil duct and the second oil duct, improves working strength.
One preferred embodiment in, described the first oil duct is surrounded by the mating surface of described upper matrix and described lower bottom base, described the second oil duct is located in described upper matrix or described lower bottom base.
The upper matrix that in this embodiment, pedestal is set to cooperatively interact and lower bottom base two parts, the part oil duct (the first oil duct) of oiling passage is arranged at matrix or/and on the mating surface of lower bottom base, compare at inside parts processing oil duct.The processing mode that present embodiment is processed oil duct on piece surface is convenient to location processing, has reduced the processing technology requirement of oiling passage, can improve process velocity and efficiency, and pedestal has Split type structure, is also beneficial to the assembling of base interior parts.
In another preferred embodiment, in the mating surface of described upper matrix and described lower bottom base, at least one is provided with ring groove, described ring groove and corresponding described through hole form shoulder hole structure, and described the first oil duct is formed at described ring groove and is mated between face.
In the time filling fluid to fluid-tight chamber, first fluid enter the second oil duct, then enter ring groove, after ring groove, enter again fluid-tight chamber, the sectional area of ring channel structures is relatively large, can relatively reduce the pressure of the fluid being entered by the second oil duct, like this when fluid is in the time that link slot flows into fluid-tight chamber again, can relatively reduce the impact of the diaphragm of fluid to fluid-tight chamber interior parts (parts such as induction chip, spun gold) and end, fluid-tight chamber, avoid destroying fluid-tight chamber interior parts and diaphragm, ensure that each parts normally work.
In another preferred embodiment, in the mating surface of described upper matrix and described lower bottom base, at least one is provided with the link slot that ring groove and at least one are communicated with described fluid-tight chamber, described ring groove is communicated with described link slot and described the second oil duct, and described the first oil duct is formed between described ring groove, described link slot and mating surface that both are corresponding.
Present embodiment consider slow down imported hydraulic oil to the basis of fluid-tight chamber interior parts and diaphragm impulsive force on, consider the volume that as far as possible reduces the first oil duct being connected with fluid-tight chamber, that is to say, reduce and be sealed in its inner fluid of pressure sensing as far as possible, reduced the impact that fluid expands with heat and contract with cold on pressure transducer performance.
For realizing another object, the present invention also provides a kind of pressure system, comprises pressure pipeline and is located at the pressure transducer on described pressure pipeline, and described pressure transducer is the pressure transducer described in above-mentioned any one.
Because above-mentioned pressure transducer has above-mentioned technique effect, the pressure system with above-mentioned pressure transducer also should have corresponding technique effect.
Brief description of the drawings
Fig. 1 is the partial structurtes schematic diagram of a kind of typical pressure sensor in prior art;
Fig. 2 is the structural representation of a kind of embodiment of pressure transducer provided by the present invention;
Fig. 3 is the cut-open view of lower bottom base in pressure transducer shown in Fig. 2;
Fig. 4 is the vertical view of lower bottom base in pressure transducer shown in Fig. 2;
Fig. 5 is the structural representation of the second embodiment of pressure transducer provided by the present invention;
Fig. 6 is the cut-open view of lower bottom base in pressure transducer shown in Fig. 5;
Fig. 7 is the vertical view of lower bottom base in pressure transducer shown in Fig. 5;
Fig. 8 is the structural representation of the third embodiment of pressure transducer provided by the present invention;
Fig. 9 is the cut-open view of lower bottom base in pressure transducer shown in Fig. 8;
Figure 10 is the vertical view of lower bottom base in pressure transducer shown in Fig. 8;
Figure 11 is the structural representation of the third embodiment of pressure transducer provided by the present invention;
Figure 12 is the cut-open view of lower bottom base in pressure transducer shown in Figure 11;
Figure 13 is the vertical view of lower bottom base in pressure transducer shown in Figure 11.
Wherein, in Fig. 1, the corresponding relation between Reference numeral and component names is:
1 pedestal; 2 seal glass; 3 guide pins; 4 induction chip boarded parts; 5 oil filler pipes; 6 induction chips; 7 diaphragms; 8 spun golds.
Wherein, in Fig. 2 to Figure 13, the corresponding relation between Reference numeral and component names is:
1 ' pedestal; 10 ' lower bottom base; The 101 ' second oil duct; 102 ' link slot; 103 ' ring groove; 11 ' upper matrix; 2 ' seal glass; 3 ' guide pin; 4 ' substrate; 5 ' induction chip; 6 ' steel ball; 7 ' pressure ring; 8 ' diaphragm; 9 ' spun gold.
Embodiment
A core of the present invention aims to provide a kind of pressure transducer, and in this pressure transducer, oiling passage plugging technique is simple, and shutoff is reliable.Another core of the present invention aims to provide a kind of pressure system that comprises above-mentioned pressure transducer.
Without loss of generality, herein introduce the technical program as circle as example taking the xsect of the pedestal in pressure transducer, it will be understood by those skilled in the art that also not getting rid of xsect is the other forms of pedestal such as square.
In order to make those skilled in the art person understand better the present invention program, the present invention is described in further detail with embodiment by reference to the accompanying drawings.
Please refer to Fig. 2, the structural representation of the first embodiment that Fig. 2 is pressure transducer provided by the present invention.
Pressure transducer provided by the present invention comprises that middle part is provided with the pedestal of through hole, two open ends of through hole have embedded respectively seal glass and have been coated with diaphragm 8 ', pedestal 1 ', seal glass 2 ', diaphragm 8 ' surround a fluid-tight chamber, usually, fluid-tight is provided with induction chip 5 ' in chamber, induction chip 5 ' can be direct or indirect to be fixed on pedestal or seal glass 2 ' upper, in seal glass 2 ', be sealed with guide pin 3 ', induction chip 5 ' can connect guide pin 3 ' by spun gold 9 '.
In the present invention, on pressure transducer, be also provided with the oiling passage that is communicated with fluid-tight chamber, oiling channel setting is on pedestal 1 ', the inlet end of the outside oil circuit of oiling channel connection is provided with seal member, seal member can be fixed on pedestal by welding manner or interference fit, seal member can be metal, for example steel can be also nonmetal such as rubber etc.
It is pointed out that " connection " herein refers to the passage of liquid communication.
In pressure transducer production run, first operating personnel inject fluid-tight chamber by oiling passage by fluid (silicone oil), and after having filled, then it is upper that seal member is fixed on to pedestal 1 ', realizes the sealing of oiling passage oil-in.Like this, when pressure-acting is on diaphragm time, it is upper that diaphragm is delivered to induction chip 5 ' by fluid, and induction chip 5 ' produces distortion, and this distortion is processed, and is then converted to the electric signal of standard, realizes the object of pressure detection.
Arrange in seal glass 2 ' with prior art compared with embedded topping up pipe, peripheral of the present invention is the oiling passage being arranged on pedestal 1 ' to the oiling passage of fluid-tight chamber oiling, fairly simple at the upper processing oiling of pedestal 1 ' via process on the one hand, without considering that processing coordinates, the factors such as sintering are installed, more easily realize, and after completing the oiling of fluid-tight chamber, while using the oil-in place of seal member sealed oiling passage, without considering that putting on snap-in force on oiling passage can cause the factors such as oiling channel deformation, without the shape that changes oiling passage, while eliminating the shutoff of prior art topping up pipe, flatten and cause body distortion, the problems such as leakage of oil of breaking, especially be to be fixed on the pressure sensor component on pedestal 1 ' by welding technology for seal member, the set-up mode of the passage of oiling herein can improve the reliability and stability of seal member welding, and sealing mode has been simplified plugging technology greatly, can improve the production efficiency of pressure transducer, reduce its use cost.
The design of oiling passage can have various ways, below introduces the embodiment of several oiling passage comparative optimizations, and particular content is as described below.
One preferred embodiment in, oiling passage can comprise the first oil duct and the second oil duct 101 ' vertically arranging, and is communicated with fluid-tight chamber by the first oil duct; The oiling passageway machining technique of this structure is fairly simple, and in the time using the end of seal member shutoff Vertical Channel, the contrast locating of seal member is more accurate, is conducive to quick and precisely install and improve the reliability of shutoff, improves the stability of pressure transducer work.
Further, the lower bottom base 10 ' that pedestal 1 ' can comprise matrix 11 ' and match with upper matrix 11 ', through hole comprises the first through hole being arranged on matrix 11 ' and is arranged at the second through hole on lower bottom base 10 ', seal glass 2 ' embeds in the first through hole, and membrane covered is in the lower ending opening place of the second through hole; The upper matrix that in this embodiment, pedestal is set to cooperatively interact and lower bottom base two parts, can further reduce the difficulty of processing the first oil duct and the second oil duct, improves working strength.
Above-mentioned, the first oil duct and the second oil duct 101 ' can be formed in same parts, that is to say, on upper matrix 11 ' or lower bottom base 10 ', process the first oil duct and the second oil duct 101 ' simultaneously, also can, coordinate and form oiling passage by two parts.
Please refer again to Fig. 2, the first oil duct is surrounded by the mating surface of upper matrix 11 ' and lower bottom base 10 ', the second oil duct 101 ' is communicated with described fluid-tight chamber by the first oil duct, that is to say, upper matrix 11 ' and lower bottom base 10 ' surround the first oil duct jointly, the second oil duct 101 ' is formed in matrix 11 ' or lower bottom base 10 ', and the second oil duct 101 ' is communicated with fluid-tight chamber by the first oil duct.
Upper matrix 11 ' and lower bottom base 10 ' two parts of in this embodiment, pedestal 1 ' being set to cooperatively interact, the part oil duct (the first oil duct) of oiling passage is arranged at matrix 11 ' or/and on the mating surface of lower bottom base 10 ', compare at inside parts processing oil duct.The processing mode that present embodiment is processed oil duct on piece surface is convenient to location processing, reduce the processing technology requirement of oiling passage, can improve process velocity and efficiency, and pedestal 1 ' has Split type structure, be also beneficial to the assembling of pedestal 1 ' inner components.
Particularly, the set-up mode of the first oil duct can be by various ways, for example only upper matrix 11 ' and lower bottom base 10 ' both one of on oil groove is set, after upper matrix 11 ' and lower bottom base 10 ' coordinate, the its corresponding mating surface of this oil groove forms the first oil duct, certainly, can also go up matrix 11 ' and lower bottom base 10 ' and be provided with oil groove on both, after upper matrix 11 ' and lower bottom base 10 ' coordinate, form the first oil duct.Below provided the preferred implementation of several the first oil duct designs, the key distinction is the shape design of the first oil duct, specifically describes as follows.
Please refer to Fig. 5, the structural representation of the second embodiment that Fig. 5 is pressure transducer provided by the present invention; Fig. 6 is the cut-open view of lower bottom base in pressure transducer shown in Fig. 5; Fig. 7 is the vertical view of lower bottom base 10 ' in pressure transducer shown in Fig. 5.
In the first embodiment, in both mating surfaces of upper matrix 11 ' and lower bottom base 10 ', at least one is provided with ring groove 103 ', ring groove 103 ' and the second through hole form shoulder hole structure, and the first oil duct is formed at ring groove 103 ' and is mated between face.
In the time filling fluid to fluid-tight chamber, first fluid enter the second oil duct 101 ', then enter ring groove 103 ', after ring groove 103 ', enter again fluid-tight chamber, the sectional area of ring groove 103 ' structure is relatively large, can relatively reduce the pressure of the fluid being entered by the second oil duct 101 ', like this when fluid is in the time that link slot 102 ' flows into fluid-tight chamber again, can relatively reduce fluid to fluid-tight chamber interior parts (induction chip 5 ', the parts such as spun gold 9 ') and the impact of the diaphragm 8 ' of end, fluid-tight chamber, avoid destroying fluid-tight chamber interior parts and diaphragm 8 ', ensure that each parts normally work.
Conventionally the fluid that pressure transducer uses is silicone oil, and silicone oil has the characteristic of expanding with heat and contract with cold, and expands with heat and contract with cold on pressure transducer detection and the impact in life-span in order to reduce silicone oil as far as possible, on the basis of the first embodiment, can improve as follows.
Please refer to Fig. 3 and Fig. 4, Fig. 3 is the cut-open view of lower bottom base in pressure transducer shown in Fig. 2; Fig. 4 is the vertical view of lower bottom base in pressure transducer shown in Fig. 2.
In the second embodiment, in both mating surfaces of upper matrix 11 ' and described lower bottom base 10 ', at least one is provided with the link slot 102 ' that ring groove 103 ' and at least one are communicated with fluid-tight chamber, it can be also two or more that the quantity of link slot 102 ' can be one, ring groove 103 ' is communicated with the second oil duct 101 ' and link slot the 102 ', the first oil duct and is formed between ring groove 103 ', link slot 102 ' and mating surface that both are corresponding; Wherein, the second oil duct 101 ' can be arranged on same parts with ring groove 103 ', is provided with the opening that connects the second oil duct 101 ' on the diapire of ring groove 103 '; The second oil duct 101 ' also can be arranged on two different parts from described ring groove 103 ', one is arranged on matrix 11 ', another one is arranged on lower bottom base 10 ', the second oil duct 101 ' is connected with the aperture position of ring groove 103 ', no matter which kind of arranges, as long as can realize above-mentioned technique effect.
Present embodiment consider slow down imported hydraulic oil to the basis of fluid-tight chamber interior parts and diaphragm 8 ' impulsive force on, consider the volume that as far as possible reduces the first oil duct being connected with fluid-tight chamber, that is to say, reduce and be sealed in its inner fluid of pressure sensing as far as possible, reduced the impact that fluid expands with heat and contract with cold on pressure transducer performance.
Certainly, for the convenience of processing, link slot 102 ' can roughly be set to horizontal, does not also get rid of and has the skewed of certain angle.
Below the third and the 4th kind of embodiment of pressure transducer have been provided herein, be with the key distinction of above-mentioned two kinds of embodiments, the first oil duct of oiling passage and the second oil duct 101 ' are arranged at respectively lower bottom base 10 ' and upper matrix 11 ' is upper, specifically arranges as described below.
Please refer to Fig. 8 to Figure 13, the structural representation of the third embodiment that Fig. 8 is pressure transducer provided by the present invention; Fig. 9 is the cut-open view of lower bottom base in pressure transducer shown in Fig. 8; Figure 10 is the vertical view of lower bottom base in pressure transducer shown in Fig. 8; Figure 11 is the structural representation of the third embodiment of pressure transducer provided by the present invention; Figure 12 is the cut-open view of lower bottom base in pressure transducer shown in Figure 11; Figure 13 is the vertical view of lower bottom base in pressure transducer shown in Figure 11.
In the third and the 4th kind of embodiment, the second oil duct 101 ' and the first oil duct are arranged at respectively on the upper matrix 11 ' of pedestal 1 ' and two parts of lower bottom base 10 ', please refer to Fig. 8 and Figure 11, the second oil duct 101 ' can be arranged on matrix 11 ', the first oil duct is surrounded by the oil groove and the upper matrix 11 ' mating surface that are opened on lower bottom base 10 ', for example above-mentioned oil groove can be ring channel structures, also can be the form such as connecting groove structure or the structure of ring groove 103 ' and link slot 102 ' composition being roughly the level of state, as long as can realize above-mentioned technique effect.
The parts such as general seal glass, induction chip are installed in the through hole of matrix 11 ', oil groove is located on lower bottom base 10 ', without the installation site of considering the parts such as seal glass 2 ', oil groove processing technology is fairly simple, and relatively ring groove 103 ' and link slot 102 ' are arranged on same parts, ring groove 103 ' and link slot 102 ' are arranged on two parts, can relatively increase the working strength of upper matrix 11 ' and lower bottom base 10 ', improve serviceable life.
Certainly, it is upper that ring groove 103 ' and/or link slot 102 ' also can be arranged at matrix 11 ', and the second oil duct 101 ' also can be arranged on lower bottom base 10 '.
In the respective embodiments described above, the inlet end of oiling passage can be provided with shoulder hole structure, and seal member is arranged at described shoulder hole step position; This set-up mode is not only conducive to the shutoff to oiling channel entrance end, and seal member can be arranged at completely to the inside, hole, large footpath of shoulder hole, can save space, do not affect the assembling of pedestal 1 ' and miscellaneous part, without the mating parts of pedestal 1 ' in prior art is carried out to structure of modification.
Above-mentioned seal member can be steel ball 6 ', and steel ball 6 ' is than being easier to location.
Further, in above-described embodiment, on the inner face of seal glass 2 ', can be provided with the substrate 4 ' that induction chip 5 ' is installed, on substrate 4 ', be provided with the pad that at least one is connected with induction chip 5 '; In this set-up mode, on substrate 4 ', be provided with the position of several fixing induction chips 5 ', in the time that induction chip 5 ' is installed, can consider the practical factor such as length, the position of guide pin 3 ' of spun gold 9 ', select suitable pad, realize the fixing of induction chip 5 ', thereby realized the fixing convenience of induction chip 5 '.
In addition, the thickness of diaphragm 8 ' is generally thinner, when with pedestal 1 ' welding, easily weldering is leaked, further in pressure transducer, arrange and press-fit the pressure ring 7 ' of diaphragm 8 ' on pedestal 1 ' herein, pressure ring 7 ' is pressed in the periphery of diaphragm 8 ' on pedestal 1 ', be divided into upper matrix 11 ' and the two-part structure of lower bottom base 10 ' for pedestal 1 ', pressure ring 7 ' is pressed in diaphragm 8 ' on lower bottom base 10 '.Like this, in the time of welding, diaphragm 8 ', pressure ring 7 ' are welded on pedestal 1 ' together, pressure ring 7 ' can increase the throat thickness of diaphragm 8 ' and pedestal 1 ', while having avoided diaphragm 8 ' welding, weld leakage problem, increased the working strength of diaphragm 8 ', extend the serviceable life of diaphragm 8 '.
In the above-mentioned embodiment that pedestal 1 ' is divided into upper matrix 11 ' and lower bottom base 10 ', upper matrix 11 ' and lower bottom base 10 ' can adopt following assembly technology.
In the first assembly technology, can first pre-processed upper matrix 11 ' and lower bottom base 10 ' be welded together, then seal glass 2 ' is sintered on the assembly of the upper matrix 11 ' that welded and lower bottom base 10 ', finally completes the assembling of other parts.
In the first assembly technology, the groove of placing weld-ring is set at upper matrix 11 ' and lower bottom base 10 ' at least one in advance, upper matrix 11 ', weld-ring, lower bottom base 10 ' are one-body molded in the sintering process of upper matrix 11 ' and seal glass 2 ', technique is simpler, does not need to increase extra technique.
It should be noted that; the upper and lower noun of locality that waits used herein, for for pressure transducer in position shown in Fig. 2, just in order to express easily; it will be understood by those skilled in the art that the noun of locality used herein should not limit the scope of the invention.
Except above-mentioned pressure transducer, the present invention also provides a kind of pressure system that comprises above-mentioned pressure transducer, comprise pressure pipeline and be located at the pressure transducer on described pressure pipeline, because above-mentioned pressure transducer has above-mentioned technique effect, the pressure system with above-mentioned pressure transducer also should have corresponding technique effect.
In a kind of concrete embodiment, pressure system is specifically as follows refrigerant pressure system.
The structure of other each several parts of above-mentioned refrigerant pressure system please refer to prior art, repeats no more herein.
Above a kind of pressure transducer provided by the present invention and pressure system are described in detail.Applied specific case herein principle of the present invention and embodiment are set forth, the explanation of above embodiment is just for helping to understand method of the present invention and core concept thereof.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection domain of the claims in the present invention.
Claims (13)
1. a pressure transducer, comprise that middle part is provided with the pedestal (1 ') of through hole, two open ends of described through hole have embedded respectively seal glass (2 ') and have been coated with diaphragm (8 '), described pedestal (1 '), seal glass (2 '), diaphragm (8 ') surround a fluid-tight chamber, it is characterized in that, also be provided with the oiling passage that is communicated with described fluid-tight chamber, described oiling channel setting is upper in described pedestal (1 '), and the inlet end of the outside oil circuit of described oiling channel connection is provided with seal member.
2. pressure transducer according to claim 1, is characterized in that, described oiling passage comprises the first oil duct and the second oil duct (101 ') vertically arranging, and is communicated with described fluid-tight chamber by described the first oil duct.
3. pressure transducer according to claim 2, it is characterized in that, the lower bottom base (10 ') that described pedestal (1 ') comprises matrix (11 ') and matches with described upper matrix (11 '), described through hole comprises the first through hole being arranged on described upper matrix (11 ') and is arranged at the second through hole on described lower bottom base (10 '), described seal glass (2 ') embeds in described the first through hole, and described diaphragm (8 ') is covered in the lower ending opening place of described the second through hole.
4. pressure transducer according to claim 3, is characterized in that, both are formed at described the first oil duct and described the second oil duct (101 ') in described upper matrix (11 ') or described lower bottom base (10 ').
5. pressure transducer according to claim 3, it is characterized in that, described the first oil duct is surrounded by the mating surface of described upper matrix (11 ') and described lower bottom base (10 '), and described the second oil duct (101 ') is formed in described upper matrix (11 ') or described lower bottom base (10 ').
6. pressure transducer according to claim 5, it is characterized in that, in described upper matrix (11 ') and both mating surfaces of described lower bottom base (10 '), at least one is provided with ring groove (103 '), described ring groove (103 ') forms shoulder hole structure with corresponding described through hole, and described the first oil duct is formed at described ring groove (103 ') and is mated between face.
7. pressure transducer according to claim 5, it is characterized in that, in described upper matrix (11 ') and both mating surfaces of described lower bottom base (10 '), at least one is provided with the link slot (102 ') that ring groove (103 ') and at least one are communicated with described fluid-tight chamber, described ring groove (103 ') is communicated with described link slot (102 ') and described the second oil duct, and described the first oil duct is formed between described ring groove (103 '), described link slot (102 ') and mating surface that both are corresponding.
8. pressure transducer according to claim 5, it is characterized in that, in described upper matrix (11 ') and both mating surfaces of described lower bottom base (10 '), wherein one is provided with the ring groove (103 ') that leads to described the second oil duct (101 '), another one is provided with the link slot (102 ') that is communicated with described fluid-tight chamber, described link slot (102 ') is communicated with described ring groove (103 ') and described fluid-tight chamber, described the first oil duct is formed at described ring groove (103 '), between the mating surface of described link slot (102 ') and both correspondences.
9. according to the pressure transducer described in claim 1 to 8 any one, it is characterized in that, the inlet end of described oiling passage is provided with shoulder hole structure, and described seal member is arranged at described shoulder hole step position.
10. pressure transducer according to claim 9, it is characterized in that, on the inner face of described seal glass (2 '), be provided with the substrate (4 ') that induction chip (5 ') is installed, on described substrate (4 '), be provided with the pad that at least one is connected with described induction chip (5 ').
11. pressure transducers according to claim 9, is characterized in that, are also provided with and press-fit the pressure ring (7 ') of described diaphragm (8 ') on described pedestal (1 ').
12. pressure transducers according to claim 9, it is characterized in that, described upper matrix (11 ') and described lower bottom base (10 ') are provided with the groove of placing weld-ring at least one, one-body molded in the sintering process of described upper matrix (11 '), described weld-ring, described lower bottom base (10 ') matrix (11 ') and described seal glass (2 ') on described.
13. 1 kinds of pressure systems, comprise pressure pipeline and are located at described pressure pipeline upward pressure sensor, it is characterized in that, described pressure transducer is the pressure transducer described in claim 1 to 12 any one.
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| CN201310148877.0A CN104122026B (en) | 2013-04-25 | 2013-04-25 | A kind of pressure sensor and pressure system |
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| CN104122026B CN104122026B (en) | 2017-11-03 |
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| CN107875507A (en) * | 2017-12-28 | 2018-04-06 | 北京灵泽医药技术开发有限公司 | Two-way mechanism and detection means, system, extrusion infusing pipeline and fluid control devices |
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| CN104122026B (en) | 2017-11-03 |
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