CN202472442U - Cooling-medium liquid level control system in evaporation-cooling sealing cavity body - Google Patents
Cooling-medium liquid level control system in evaporation-cooling sealing cavity body Download PDFInfo
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- CN202472442U CN202472442U CN2012200686949U CN201220068694U CN202472442U CN 202472442 U CN202472442 U CN 202472442U CN 2012200686949 U CN2012200686949 U CN 2012200686949U CN 201220068694 U CN201220068694 U CN 201220068694U CN 202472442 U CN202472442 U CN 202472442U
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- eliminating medium
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Abstract
The utility model discloses a cooling-medium liquid level control system in an evaporation-cooling sealing cavity body, comprising a piezoelectric element and a controller, wherein the piezoelectric element is fixed in the evaporation-cooling sealing cavity body; pole plates at the two sides of the piezoelectric element are vertically arranged at the set liquid filling surface; the piezoelectric element generates corresponding electric signals according to the size of the hydrostatic pressure of the cooling mediums on the two pole plates on the opposite side surfaces; the controller obtains a judgment result of whether the top surfaces of the cooling mediums reach the set liquid filling surface according to the sizes of the electric signals and outputs a control signal for driving corresponding actuating elements according to the judgment result. Compared with the prior art, the cooling-medium liquid level control system disclosed by the utility model has the advantages that the structure is simple, the errors generated by human factors are greatly reduced; in addition, an observation window does not need to be arranged on an equipment shell, and the difficulty for application of an immersion type evaporation-cooling technology on explosive-proof appliance equipment is solved.
Description
Technical field
The utility model relates to flame-proof type horizontal machine technical field, is specifically related to heat eliminating medium fluid level control system in the evaporative cooling seal chamber.
Background technology
The immersion type evaporation cooling technique is comparatively advanced at present a kind of novel cooling technology, is widely used on the relatively more outstanding electric equipment of power consumptions such as horizontal machine, large-scale power device, mainframe computer workstation, heating.
Implement the immersion type evaporation cooling technique; Need be in a seal chamber with the device sealing that is cooled; And (evaporative cooling medium is for liquid under a kind of normal temperature to pour into the evaporative cooling medium of capacity; And the megohmite insulant that density is big, colourless, tasteless, in seal chamber, the liquid level of liquid evaporative cooling medium should not crossed the device that is cooled).The a large amount of heats that produce during the electric equipment operation; The evaporative cooling medium temperature is raise and the boiling vaporization; Heat eliminating medium and the external condensation equipment of vaporization carries out after the heat interchange liquified flow again to be got back in the seal chamber; Can the heat that device produces in time be dispersed into the outside of electric equipment through above-mentioned evaporative cooling process, thereby guarantee that electric equipment normally moves.
In order to guarantee the work safety of electric equipment, in above-mentioned evaporative cooling process, the pressure in the seal chamber should remain normal pressure, therefore, must reserve certain space in the seal chamber, the volumetric expansion during with the evaporation of buffering evaporative cooling medium; Moreover the price comparison of evaporative cooling medium is expensive at present.In view of the above, the evaporative cooling medium that is circulated in the seal chamber is not The more the better, but should be controlled on the rational liquid level.The main practice is on the outer wall of seal chamber, to offer a transparent view window structure at present, utilizes this window structure to observe the liquid level situation of evaporative cooling medium when the annular seal space perfusion in vivo.This practice, owing to artificial factor, error is bigger on the one hand; On the other hand, for the flame-proof type electric equipment, must be complete owing to require the flame proof casing; Any opening can not be arranged; Therefore, can not adopt the view window structure to observe the liquid level of evaporative cooling medium at seal chamber, thus the perfusion situation of uncontrollable evaporative cooling medium in seal chamber.
In view of this, need badly to prior art and improve, the filling liquid level of heat eliminating medium in the seal chamber during with effective control flame-proof type electric equipment evaporative cooling.
The utility model content
To above-mentioned defective, the technical matters that the utility model solves is, heat eliminating medium fluid level control system in a kind of evaporative cooling seal chamber is provided, the filling liquid level of heat eliminating medium in the seal chamber when being used for controlling the evaporative cooling of flame-proof type electric equipment exactly.
Heat eliminating medium fluid level control system in the evaporative cooling seal chamber that the utility model provides; Comprise piezoelectric element and controller; Said piezoelectric element is fixed in the evaporative cooling seal chamber; The both sides pole plate of said piezoelectric element vertically is arranged on to set irritates the liquid level place, and said piezoelectric element produces corresponding electric signal according to the hydrostatic pressure size of two suffered heat eliminating mediums of pole plate on its opposite flank; Whether said controller arrives the judged result of setting the filling liquid level according to the end face of the size acquisition heat eliminating medium of said electric signal, and drives the control signal of corresponding executive component according to said judged result output.
Preferably, said executive component is pilot lamp or loudspeaker, and said pilot lamp or loudspeaker are opened or closed to said control signal.
Preferably; Said controller is an insulated gate bipolar transistor; Be serially connected in the feed circuit of said pilot lamp or loudspeaker; Two pole plates of said piezoelectric element are connected respectively on the positive and negative electrode of an electric capacity, and said electric capacity is that voltage signal forms said control signal with said electrical signal conversion, drives said insulated gate bipolar transistor and is switched on or switched off said feed circuit.
Preferably, the control utmost point of the said insulated gate bipolar transistor positive pole, the source electrode that are connected to said electric capacity is connected to the positive pole that is connected to the direct supply in the said feed circuit behind negative pole, the drain electrode said pilot lamp of series connection or the loudspeaker of the direct supply in the said feed circuit.
Preferably, said controller is a single-chip microcomputer.
Said controller, said executive component are the operation valve that is arranged in the heat eliminating medium priming line, and said operation valve is opened or closed to said control signal.
Heat eliminating medium fluid level control system in the evaporative cooling seal chamber that the utility model provides; At evaporative cooling seal chamber internal fixation a piezoelectric element is set; And the both sides pole plate that makes piezoelectric element vertically is arranged on to set irritates the liquid level place; Piezoelectric element will produce corresponding electric signal according to the hydrostatic pressure size of its two suffered heat eliminating mediums of pole plate; Whether the end face that obtains heat eliminating medium through controller according to the size of said electric signal then arrives is set the judged result of irritating liquid level, and drives the control signal of corresponding executive component according to said judged result output, thereby realizes the accurate control of heat eliminating medium perfusion liquid level.Compared with prior art, the technical scheme that the utility model provides has significantly reduced the error that human factor produces, and simple in structure; In addition, the technical scheme that the utility model provides need not be provided with view window on apparatus casing, has solved the difficult problem that the immersion type evaporation cooling technique is used on the flame-proof type electric equipment.
In the preferred version of above-mentioned control system; What controller adopted is insulated gate bipolar transistor; Be serially connected in the feed circuit of pilot lamp or loudspeaker; Two pole plates of piezoelectric element are connected respectively on the positive and negative electrode of an electric capacity, and electric capacity is that voltage signal forms said control signal with said electrical signal conversion, drives said insulated gate bipolar transistor and is switched on or switched off said feed circuit.This design proposal on basis cheaply, is swift in response.
In the another kind of preferred version of above-mentioned control system; Said executive component is the operation valve that is arranged in the heat eliminating medium priming line; Said operation valve is opened or closed to said control signal; This scheme has improved control accuracy through the automatic control of filling process that has been arranged on operation valve and chip microcontroller in the heat eliminating medium priming line, has saved cost of labor simultaneously.
Description of drawings
Fig. 1 is the horizontal Induction Motor Structure synoptic diagram of immersion type evaporative cooling flame-proof type;
Fig. 2 is a piezoelectric element output signals collecting synoptic diagram in the interior heat eliminating medium fluid level control system of the described evaporative cooling seal chamber of embodiment;
Fig. 3 is a control circuit synoptic diagram in the interior heat eliminating medium fluid level control system of the described evaporative cooling seal chamber of embodiment.
Among the figure:
Liquid level 13 is irritated in casing 10, stator 11, rotor 12, seal stator cavity 20, setting;
Piezoelectric element P, capacitor C 1, insulated gate bipolar transistor IGBT, control utmost point G, source S, drain D, pilot lamp L, direct supply V.
Embodiment
The core of the utility model is to provide heat eliminating medium fluid level control system in a kind of evaporative cooling seal chamber; Its fundamental purpose is for the equipment that adopts the immersion type evaporation cooling technique; In the process of annular seal space perfusion in vivo heat eliminating medium; Reduce because artificial the observation confirms whether the perfusion liquid level arrives the error that desired location produces; And, therefore also solved the difficult problem that the immersion type evaporation cooling technique is used simultaneously on the flame-proof type electric equipment because the technical scheme that the utility model provides need not be provided with view window on the housing of equipment.Specify this embodiment below in conjunction with Figure of description.
Be without loss of generality, this embodiment is elaborated as main body with the horizontal asynchronous motor of immersion type evaporative cooling flame-proof type.Should be appreciated that the cognitive ability according to those skilled in the art, the technical scheme that the utility model provides is equally applicable to other immersion type evaporative cooling electric equipment, for example: mainframe computer workstation etc.This specific embodiment is not the restriction of formation to technical scheme.
See also Fig. 1; This figure is the structural representation of the horizontal asynchronous motor of immersion type evaporative cooling flame-proof type; Comprise the stator 11 and rotor 12 that are arranged in the casing 10, wherein stator 11 is sealed in the seal stator cavity 20, is perfused with heat eliminating medium in this seal stator cavity 20; And heat eliminating medium soaks stator 11 to realize the cooling (among Fig. 1,13 of marks refer to the setting of heat eliminating medium and irritate liquid level position) to stator fully.The interior heat eliminating medium fluid level control system of the evaporative cooling seal chamber that this asynchronous motor has used the utility model to provide is to reduce heat eliminating medium in filling process, owing to whether the definite liquid level that pours into of artificial observation arrives the error that desired location produces.
The heat eliminating medium fluid level control system comprises piezoelectric element and controller in the evaporative cooling seal chamber; This piezoelectric element is fixed in the evaporative cooling seal chamber; And the both sides pole plate of this piezoelectric element vertically is arranged on to set irritates the liquid level place; In the course of work, piezoelectric element produces corresponding electric signal according to the hydrostatic pressure size of two suffered heat eliminating mediums of pole plate on its opposite flank; Whether controller arrives the judged result of setting the filling liquid level according to the end face of the size acquisition heat eliminating medium of this electric signal, and drives the control signal of corresponding executive component according to this judged result output.
Wherein, piezoelectric element refers on its two relative side, positive and negative pole plate is set respectively and the detecting element that constitutes by the dielectric substance that possesses piezoelectric effect (piezoelectric dielectric).Dielectric substance is charged at ordinary times and show electric neutrality; When its along the time spent of doing that certain orientation receives external force, inner can produce type polarization phenomena, produce a large amount of free electrons (electronegativity) simultaneously; The atomic nucleus that loses electronics is an electropositivity; Thereby form inner faint electric field, under the promotion of this inner faint electric field, the stressed surface of dielectric substance can accumulate out is enough to the amount of charge that detected by positive and negative pole plate.When external force disappeared, because nuclear attraction, free electron will be retracted in the nuclear structure again, and this moment, piezoelectric dielectric reverted to uncharged electric neutrality state again.Piezoelectric dielectric can be divided three classes: (1) quartz crystal class belongs to natural monocrystal; (2) piezoelectric ceramics belongs to the polycrystal of synthetic; (3) high polymer piezoelectric material.Those skilled in the art can select dissimilar piezoelectric elements according to concrete application scenario.
Referring to Fig. 2 and Fig. 3, Fig. 2 and Fig. 3 show a specific embodiment of heat eliminating medium fluid level control system in the evaporative cooling seal chamber, in this specific embodiment again; Executive component is pilot lamp (also can adopt loudspeaker); Because the voltage signal that electric charge produced that accumulates on the piezoelectric element generally is very little, it is shinny to be not enough to drive pilot lamp, therefore; Controller has adopted insulated gate bipolar transistor IGBT, is serially connected in the feed circuit of pilot lamp L (loudspeaker).Insulated gate bipolar transistor IGBT is a kind of full-control type field effect transistor, can be used as full-controlled switch and uses, and the voltage signal that electric charge produced that accumulates on the piezoelectric element can drive the control utmost point of IGBT fully.Concrete connected mode is: two pole plates (positive and negative electrode pole plate) of piezoelectric element P are connected respectively on the positive and negative electrode of a capacitor C 1; Positive pole, the source S that the control utmost point G of insulated gate bipolar transistor IGBT is connected to capacitor C 1 is connected to the positive pole that is connected to the direct supply V in the feed circuit behind the negative pole, drain D series connection pilot lamp L (loudspeaker) of the direct supply V in the feed circuit; Capacitor C 1 piezoelectric element P is received the heat eliminating medium static pressure and the electrical signal conversion that produces to be voltage signal form control signal corresponding; Drive insulated gate bipolar transistor IGBT and be switched on or switched off feed circuit, to remind the associative operation personnel.If G has voltage signal on extremely, then IGBT conducting so feed circuit are paths, have electric current to flow through and makes pilot lamp L shinny; If G extremely goes up the no-voltage signal, then IGBT ends, so feed circuit break off, pilot lamp L extinguishes.
The implementation process of above-mentioned specific embodiment is following:
At first; Before the evaporative cooling medium of liquid state pours into the seal stator cavity; Configure the predetermined filling liquid level position of heat eliminating medium; And fixing piezoelectric element P on other the solid support thing on the seal stator cavity inner wall above this irritates liquid level position or in the seal stator cavity, the both sides pole plate of piezoelectric element P vertically is arranged on to set irritates the liquid level place, and the battery lead plate on the piezoelectric element P two relative side is vertical with predetermined filling liquid level.
Then; Near fixing again capacitor C that matches 1 this piezoelectric element P; Two pole plates (positive and negative electrode pole plate) of piezoelectric element P are connected respectively on the positive and negative electrode of capacitor C 1, and when piezoelectric element P accumulated out electric charge because receiving the external force effect on its two pole plates, this charge Q amount was transmitted on the capacitor C 1 through lead; Be equivalent to charge to electric capacity; If the electric capacity of charging capacitor is C, then this capacitor C 1 produces and output voltage U=Q/C, and voltage U is passed through the path of specific zero-decrement shielded conductor along inner other extension lines of horizontal machine again; Be drawn out to the outside of explosion-proof motor with other extension lines by the terminal box on the explosion-proof housing, as control signal.Certainly, the capacitor C 1 that is complementary with piezoelectric element P also can be arranged on seal stator cavity outside, all can as long as can satisfy the basic function of signal transmission.
Liquid evaporative cooling medium is slowly poured into by the valve of seal stator cavity bottom, along with constantly slowly getting into of heat eliminating medium, irritates liquid level and slowly raises; In the meantime, piezoelectric element P is uncharged, and the charge Q amount equals 0; The output voltage U of the capacitor C 1 that is attached thereto equals 0, and therefore, insulated gate bipolar transistor IGBT ends; Feed circuit break off, and pilot lamp L does not work.
Evaporative cooling medium liquid in getting into the seal stator cavity did not have whole stator, and when its filling liquid level just arrived at assigned address, this moment, piezoelectric element P still was exposed at outside the heat eliminating medium; Just its lower end contacts with irritating liquid level, and its two opposite flanks also do not receive the effect of heat eliminating medium hydrostatic pressure, along with heat eliminating medium liquid continues to pour into; Irritate liquid level and begin to contact piezoelectric element P; This moment, the side of piezoelectric element P began to bear the hydrostatic pressure F of media fluid, so begin to occur piezoelectric effect, produced a certain amount of charge Q; This charge Q gives capacitor C 1 charging, output voltage signal.
The charge Q amount is very little during beginning, and voltage signal U is also very little, is not enough to drive IGBT; Along with the continuation of irritating liquid level raises, the charge Q amount increases gradually, and voltage signal U also increases gradually; After evaporative cooling medium liquid did not have piezoelectric element P fully, output voltage U enough drove insulated gate bipolar transistor IGBT, so feed circuit become path by open circuit; Pilot lamp L is lighted, and operating personnel see that pilot lamp L is shinny then to stop to irritate liquid.
Subsequently, irritate the liquid personnel and begin to discharge heat eliminating medium liquid through the valve of seal stator cavity lower bottom part, the heat eliminating medium liquid level in the seal stator cavity begins to descend; When piezoelectric element P began to expose the heat eliminating medium liquid level, its hydrostatic pressure F that receives began to reduce, and the charge Q on the piezoelectric element P electrode begins to reduce; Then output voltage U reduces; But as long as also have voltage signal, then insulated gate bipolar transistor IGBT remains conducting, and pilot lamp L still is a luminance.
A certain amount of from the discharge of seal stator cavity when heat eliminating medium, when making its liquid level concordant with the bottom surface of piezoelectric element P (arriving preset filling liquid level position), piezoelectric element P exposes heat eliminating medium fully; No longer receive hydrostatic pressure F, i.e. F=0, therefore; Charge Q amount on two pole plates of piezoelectric element P also equals 0; Output voltage signal U is 0, and this moment, insulated gate bipolar transistor IGBT did not end because there being voltage drive signals, and feed circuit break off; Pilot lamp L extinguishes; Irritate the liquid personnel and see that pilot lamp L extinguishes and then stop to discharge heat eliminating medium, thereby the liquid level of heat eliminating medium in the seal stator cavity is rested on the preset filling liquid level position, to guarantee that stator is immersed in the heat eliminating medium fully.
In such scheme, also can use single-chip microcomputer as controller, and realize the evaporative cooling medium automatic filling through the operation valve that is arranged in the heat eliminating medium priming line further.Concrete scheme is: single-chip microcomputer detects piezoelectric element output voltage size, and according to output voltage size output control signal corresponding, opens or close said operation valve.
In addition; What such scheme all adopted is after heat eliminating medium did not have piezoelectric element, to be discarded to the mode concordant with its bottom surface again; This is because one side is when heat eliminating medium just contacts with the bottom surface of piezoelectric element, though can produce voltage signal U this moment; But U is very little, is not enough to drive insulated gate bipolar transistor IGBT; Though also can set the certain altitude that the heat eliminating medium liquid level arrives piezoelectric element (for example 1/3rd of the piezoelectric element height or half the,, this scheme receives the influence of liquid fluctuating easily); In a word, after heat eliminating medium did not have piezoelectric element, even continue perfusion; Voltage signal U also no longer changes, and can avoid the influence of heat eliminating medium liquid fluctuating like this, and heat eliminating medium do not have piezoelectric element after voltage signal U also no longer change; Be a stable signal, can reduce error.
In such scheme, insulated gate bipolar transistor IGBT also can adopt the brilliant lock (GTO) of gate electrode capable of switching off, power transistor (GTR), electric power FET full-control type power devices such as (EFT).
The above only is the preferred implementation of the utility model; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; Can also make some improvement and retouching, these improvement and retouching also should be regarded as the protection domain of the utility model.
Claims (6)
1. heat eliminating medium fluid level control system in the evaporative cooling seal chamber is characterized in that, comprising:
Piezoelectric element; Be fixed in the evaporative cooling seal chamber; The both sides pole plate of said piezoelectric element vertically is arranged on to set irritates the liquid level place, and said piezoelectric element produces corresponding electric signal according to the hydrostatic pressure size of two suffered heat eliminating mediums of pole plate on its opposite flank;
Controller, whether the end face that obtains heat eliminating medium according to the size of said electric signal arrives is set the judged result of irritating liquid level, and drives the control signal of corresponding executive component according to said judged result output.
2. heat eliminating medium fluid level control system in the evaporative cooling seal chamber according to claim 1 is characterized in that said executive component is pilot lamp or loudspeaker, and said pilot lamp or loudspeaker are opened or closed to said control signal.
3. heat eliminating medium fluid level control system in the evaporative cooling seal chamber according to claim 2; It is characterized in that; Said controller is an insulated gate bipolar transistor, is serially connected in the feed circuit of said pilot lamp or loudspeaker, and two pole plates of said piezoelectric element are connected respectively on the positive and negative electrode of an electric capacity; Said electric capacity is that voltage signal forms said control signal with said electrical signal conversion, drives said insulated gate bipolar transistor and is switched on or switched off said feed circuit.
4. heat eliminating medium fluid level control system in the evaporative cooling seal chamber according to claim 3; It is characterized in that positive pole, the source electrode that the control utmost point of said insulated gate bipolar transistor is connected to said electric capacity is connected to the positive pole that is connected to the direct supply in the said feed circuit behind negative pole, the drain electrode said pilot lamp of series connection or the loudspeaker of the direct supply in the said feed circuit.
5. heat eliminating medium fluid level control system in the evaporative cooling seal chamber according to claim 1 is characterized in that said controller is a single-chip microcomputer.
6. heat eliminating medium fluid level control system in the evaporative cooling seal chamber according to claim 5 is characterized in that said executive component is the operation valve that is arranged in the heat eliminating medium priming line, and said operation valve is opened or closed to said control signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200686949U CN202472442U (en) | 2012-02-28 | 2012-02-28 | Cooling-medium liquid level control system in evaporation-cooling sealing cavity body |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200686949U CN202472442U (en) | 2012-02-28 | 2012-02-28 | Cooling-medium liquid level control system in evaporation-cooling sealing cavity body |
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| CN202472442U true CN202472442U (en) | 2012-10-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012200686949U Expired - Lifetime CN202472442U (en) | 2012-02-28 | 2012-02-28 | Cooling-medium liquid level control system in evaporation-cooling sealing cavity body |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102594025A (en) * | 2012-02-28 | 2012-07-18 | 肖富凯 | Method and system for controlling liquid level of cooling medium in evaporative cooling sealing cavity |
-
2012
- 2012-02-28 CN CN2012200686949U patent/CN202472442U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102594025A (en) * | 2012-02-28 | 2012-07-18 | 肖富凯 | Method and system for controlling liquid level of cooling medium in evaporative cooling sealing cavity |
| CN102594025B (en) * | 2012-02-28 | 2015-01-14 | 肖富凯 | Method and system for controlling liquid level of cooling medium in evaporative cooling sealing cavity |
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Effective date of registration: 20161229 Address after: 8 No. 411100 Hunan province Xiangtan City Jiuhua Industrial Park, Jiangnan Road Patentee after: MCC (Xiangtan) Heavy Industrial Equipment Co., Ltd. Address before: 8 No. 411200 Hunan province Xiangtan City Jiuhua Industrial Park, Jiangnan Road Patentee before: Xiao Fukai Patentee before: Luan Ru Patentee before: MCC (Xiangtan) Heavy Industrial Equipment Co., Ltd. |
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| CX01 | Expiry of patent term |
Granted publication date: 20121003 |
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| CX01 | Expiry of patent term |