CN113153763A - Magnetic pump under low-temperature vacuum environment - Google Patents
Magnetic pump under low-temperature vacuum environment Download PDFInfo
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- CN113153763A CN113153763A CN202110482401.5A CN202110482401A CN113153763A CN 113153763 A CN113153763 A CN 113153763A CN 202110482401 A CN202110482401 A CN 202110482401A CN 113153763 A CN113153763 A CN 113153763A
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- shell
- magnetic pump
- end cover
- circulation loop
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- 238000007789 sealing Methods 0.000 claims abstract description 72
- 239000007788 liquid Substances 0.000 claims abstract description 66
- 238000001746 injection moulding Methods 0.000 claims description 15
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims description 10
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 3
- 230000033228 biological regulation Effects 0.000 abstract description 9
- 239000010687 lubricating oil Substances 0.000 abstract description 6
- 230000001105 regulatory effect Effects 0.000 abstract description 6
- 230000005540 biological transmission Effects 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 64
- 230000001276 controlling effect Effects 0.000 description 30
- 238000009434 installation Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 239000003921 oil Substances 0.000 description 6
- 239000000498 cooling water Substances 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000013507 mapping Methods 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D13/0606—Canned motor pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/021—Units comprising pumps and their driving means containing a coupling
- F04D13/024—Units comprising pumps and their driving means containing a coupling a magnetic coupling
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/021—Units comprising pumps and their driving means containing a coupling
- F04D13/024—Units comprising pumps and their driving means containing a coupling a magnetic coupling
- F04D13/027—Details of the magnetic circuit
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D13/0606—Canned motor pumps
- F04D13/0626—Details of the can
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/58—Cooling; Heating; Diminishing heat transfer
- F04D29/5806—Cooling the drive system
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention relates to the technical field of magnetic pumps, in particular to a magnetic pump in a low-temperature vacuum environment, which comprises a magnetic pump body and a motor arranged on one side of the magnetic pump body, wherein an outer magnetic rotor is arranged on a part of a rotating shaft, which is positioned between a sealing shell and a front end cover, and the outer magnetic rotor and an inner magnetic rotor are oppositely arranged; the motor realizes power transmission to the magnetic pump body through the mutual matching of the outer magnetic rotor and the inner magnetic rotor so as to drive the impeller of the magnetic pump body. In addition, the outer shell is additionally arranged on the basis of the traditional motor, so that the outer shell, the inner shell, the front end cover and the rear end cover jointly form a closed annular cavity which is used for being communicated with an external gas circulation loop or a liquid circulation loop to achieve the temperature regulation of the motor, the traditional motor is designed into a fully-closed structure, the motor is ensured not to be influenced by the internal and external pressure difference, and therefore the temperature of the motor can be regulated in a vacuum environment and lubricating oil can be prevented from overflowing.
Description
Technical Field
The invention relates to the technical field of magnetic pumps, in particular to a magnetic pump in a low-temperature vacuum environment.
Background
The transportation and pressurization of low-temperature liquid such as liquid oxygen, liquid nitrogen, liquid argon, low-temperature cooling medium of a mechanical equipment cooling system and the like need to use a low-temperature liquid pump to drive the low-temperature liquid particularly in the circulating flow. Motors are one of the most common devices in the electromechanical field, but motors specifically applied in vacuum are not common. Under the vacuum condition, the heat dissipation of the motor is difficult (the heat dissipation cannot be conducted through air), and meanwhile, because the internal pressure and the external pressure of the motor are different, namely when the external pressure of the motor is greater than the internal pressure, if the interior of the motor is a vacuum environment and the exterior of the motor is a natural environment, the air outside the motor can enter the interior of the motor, so that the vacuum degree of the interior of the motor is influenced; when the internal pressure of the motor is greater than the external pressure, if the external of the motor is in a vacuum environment and the internal of the motor is in a natural environment, air in the motor can escape and carry a little lubricating oil on a motor bearing to overflow, so that the vacuum degree and the motor performance of the external of the motor are influenced; therefore, in the above case, the motor cannot be stably operated for a long period of time, and the service life of the motor is shortened.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: provided is a magnetic pump in a low-temperature vacuum environment, which can adjust the temperature of a motor in the vacuum environment, prevent lubricating oil from overflowing, and provide power for a magnetic pump body through magnetic force.
In order to solve the technical problems, the invention adopts a technical scheme that:
a magnetic pump in a low-temperature vacuum environment comprises a magnetic pump body and a motor arranged on one side of the magnetic pump body;
an impeller, a rotating shaft and an inner magnetic rotor are arranged in the magnetic pump body, one end of the rotating shaft is connected with the impeller, and the inner magnetic rotor is arranged at the other end of the rotating shaft;
the motor comprises a front end cover, an inner shell, an outer shell, a rear end cover, a rotating shaft, a sealing shell and an outer magnetic rotor; the inner shell and the outer shell are both cylindrical and are provided with openings corresponding to the two cylindrical ends, the outer shell is sleeved outside the inner shell and is coaxially arranged with the inner shell, the front end cover is respectively connected with the opening edge of one end of the inner shell and the opening edge of the outer shell at the other end in a sealing manner, the rear end cover is respectively connected with the opening edge of the inner shell and the opening edge of the outer shell at the other end in a sealing manner, a through hole for a rotating shaft to pass through is formed in the center of the front end cover, and the rotating shaft is arranged in the through hole in a penetrating manner through mechanical sealing manner; the sealing shell cover is arranged on one side surface of the front end cover back to the rear end cover and is in sealing connection with the front end cover, an external magnetic rotor is arranged on the part of the rotating shaft between the sealing shell and the front end cover, and the external magnetic rotor and the internal magnetic rotor are oppositely arranged;
the outer shell, the inner shell, the front end cover and the rear end cover jointly form a closed annular cavity, an inlet end and an outlet end are arranged on the outer shell, the inlet end and the outlet end are communicated with the annular cavity, and the inlet end and the outlet end are connected with an external gas circulation loop or a liquid circulation loop.
The invention has the beneficial effects that:
the invention provides a magnetic pump in a low-temperature vacuum environment, which comprises a magnetic pump body and a motor arranged on one side of the magnetic pump body, wherein an external magnetic rotor is arranged on a part of a rotating shaft, which is positioned between a sealing shell and a front end cover, and the external magnetic rotor and an internal magnetic rotor are arranged oppositely; the motor realizes power transmission to the magnetic pump body through the mutual matching of the outer magnetic rotor and the inner magnetic rotor so as to drive the impeller of the magnetic pump body. In addition, through having increased the shell body on the basis of traditional motor for shell body, interior casing, front end housing and rear end cap form a inclosed annular cavity jointly for the gaseous circulation return circuit or the liquid circulation return circuit of switch-on external world reach the temperature regulation to the motor, and still design traditional motor into totally enclosed structure, specifically do: the front end cover is respectively connected with the opening edges of the inner shell and the outer shell at one end in a sealing way, the rear end cover is respectively connected with the opening edges of the inner shell and the outer shell at the other end in a sealing way, a through hole for a rotating shaft to pass through is formed in the center of the front end cover, and the rotating shaft penetrates through the through hole through mechanical sealing; the sealing shell cover is arranged on one side surface of the front end cover back to the rear end cover and is in sealing connection with the front end cover. According to the mode, the fully-closed structure is realized, and the motor is not influenced by the difference between the internal pressure and the external pressure, so that the temperature of the motor can be regulated in a vacuum environment, and meanwhile, lubricating oil can be prevented from overflowing.
Drawings
FIG. 1 is a cross-sectional view of a magnetic pump of the present invention in a low temperature vacuum environment;
description of reference numerals:
1. a front end cover; 2. an inner housing; 3. an outer housing; 4. a rear end cap; 5. a rotating shaft; 6. a through hole; 7. an annular cavity; 8. an inlet end; 9. an outlet end; 10. a first thermometer; 11. a second thermometer; 12. a rotor; 13. a stator; 14. a bearing; 15. a magnetic pump body; 16. an impeller; 17. a rotating shaft; 18. an inner magnetic rotor; 19. sealing the housing; 20. an outer magnetic rotor.
Detailed Description
In order to explain technical contents, achieved objects, and effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.
Referring to fig. 1, the magnetic pump in a low-temperature vacuum environment according to the present invention includes a magnetic pump body and a motor disposed on one side of the magnetic pump body;
an impeller, a rotating shaft and an inner magnetic rotor are arranged in the magnetic pump body, one end of the rotating shaft is connected with the impeller, and the inner magnetic rotor is arranged at the other end of the rotating shaft;
the motor comprises a front end cover, an inner shell, an outer shell, a rear end cover, a rotating shaft, a sealing shell and an outer magnetic rotor; the inner shell and the outer shell are both cylindrical and are provided with openings corresponding to the two cylindrical ends, the outer shell is sleeved outside the inner shell and is coaxially arranged with the inner shell, the front end cover is respectively connected with the opening edge of one end of the inner shell and the opening edge of the outer shell at the other end in a sealing manner, the rear end cover is respectively connected with the opening edge of the inner shell and the opening edge of the outer shell at the other end in a sealing manner, a through hole for a rotating shaft to pass through is formed in the center of the front end cover, and the rotating shaft is arranged in the through hole in a penetrating manner through mechanical sealing manner; the sealing shell cover is arranged on one side surface of the front end cover back to the rear end cover and is in sealing connection with the front end cover, an external magnetic rotor is arranged on the part of the rotating shaft between the sealing shell and the front end cover, and the external magnetic rotor and the internal magnetic rotor are oppositely arranged;
the outer shell, the inner shell, the front end cover and the rear end cover jointly form a closed annular cavity, an inlet end and an outlet end are arranged on the outer shell, the inlet end and the outlet end are communicated with the annular cavity, and the inlet end and the outlet end are connected with an external gas circulation loop or a liquid circulation loop.
From the above description, the beneficial effects of the present invention are:
the invention provides a magnetic pump in a low-temperature vacuum environment, which comprises a magnetic pump body and a motor arranged on one side of the magnetic pump body, wherein an external magnetic rotor is arranged on a part of a rotating shaft, which is positioned between a sealing shell and a front end cover, and the external magnetic rotor and an internal magnetic rotor are arranged oppositely; the motor realizes power transmission to the magnetic pump body through the mutual matching of the outer magnetic rotor and the inner magnetic rotor so as to drive the impeller of the magnetic pump body. In addition, through having increased the shell body on the basis of traditional motor for shell body, interior casing, front end housing and rear end cap form a inclosed annular cavity jointly for the gaseous circulation return circuit or the liquid circulation return circuit of switch-on external world reach the temperature regulation to the motor, and still design traditional motor into totally enclosed structure, specifically do: the front end cover is respectively connected with the opening edges of the inner shell and the outer shell at one end in a sealing way, the rear end cover is respectively connected with the opening edges of the inner shell and the outer shell at the other end in a sealing way, a through hole for a rotating shaft to pass through is formed in the center of the front end cover, and the rotating shaft penetrates through the through hole through mechanical sealing; the sealing shell cover is arranged on one side surface of the front end cover back to the rear end cover and is in sealing connection with the front end cover. According to the mode, the fully-closed structure is realized, and the motor is not influenced by the difference between the internal pressure and the external pressure, so that the temperature of the motor can be regulated in a vacuum environment, and meanwhile, lubricating oil can be prevented from overflowing.
Furthermore, the sealing shell is concave, the part of the magnetic pump body corresponding to the inner magnetic rotor is embedded into the concave corresponding to the sealing shell, and a gap is formed between the magnetic pump body and the sealing shell.
As can be seen from the above description, a gap is formed between the magnetic pump body and the seal housing, that is, the gap is not in contact with the seal housing, and when the portion of the magnetic pump body corresponding to the inner magnetic rotor is embedded into the corresponding concave shape of the seal housing, the inner magnetic rotor and the outer magnetic rotor are arranged oppositely.
Furthermore, a pressure sensor and a flow sensor are arranged on the magnetic pump body, so that the pressure value and the flow value of an inlet and an outlet of the magnetic pump body can be monitored, and subsequent data analysis can be conveniently carried out.
Further, the gas in the gas circulation loop is anhydrous hot gas, and the liquid in the liquid circulation loop is water, oil or alcohol.
From the above description, it can be seen that the use of the above-described media satisfies practical requirements.
Furthermore, be equipped with the installation hole site on the rear end cap, the last embedding of installation hole site is equipped with power terminal, power terminal one end is connected with the winding electricity that sets up in interior casing inside, the power terminal other end is used for with outside plug or socket looks adaptation.
Further, the power terminal includes lead wire, connects electrical terminal and a cylindrical injection molding body, lead wire one end and connect electrical terminal one end to inlay respectively and locate in the injection molding body and mutual welding, be equipped with the annular groove on injection molding body and the installation hole site matched with side, the embedded ring type seal that is equipped with of annular groove, the ring type seal is inconsistent with the installation hole site.
As can be seen from the above description, with the above structure, the sealing effect of the power supply terminal is achieved. The lead wire and the electric terminal are integrally formed with the injection molding body through an injection molding process, and specifically, the lead wire and the electric terminal are welded firstly, and a power supply wiring terminal is formed after welding in an injection molding mode, so that the interior of the power supply wiring terminal has sealing performance, the exterior of the power supply wiring terminal is in contact with an installation hole position on the rear end cover through the annular sealing ring to achieve a sealing effect, and the annular groove plays a role in limiting the annular sealing ring, so that the sealing stability of the power supply wiring terminal is ensured.
Further, the temperature measuring device also comprises a first thermometer, a second thermometer, a processor and an electronic switch valve; the first thermometer is arranged on the surface of the inner shell, the second thermometer is arranged on the surface of the outer shell, the electronic switch valve is arranged on a passage between the inlet end and the gas circulation loop or the liquid circulation loop, and the first thermometer, the second thermometer and the electronic switch valve are respectively and electrically connected with the processor.
It can be known from the above description that the first temperature value on the surface of the inner shell is collected through the first thermometer to judge whether temperature adjustment is needed, if the first temperature value exceeds the first preset threshold range, the temperature of the motor needs to be adjusted, and the second temperature value on the surface of the outer shell is obtained through the second thermometer, that is, the optimum temperature adjustment mode is selected according to the external environment temperature of the motor, and the processor analyzes the optimum temperature adjustment mode and sends the optimum temperature adjustment mode to the corresponding electronic switch valve to open, so that the opening of the passage between the inlet end and the gas circulation loop or the liquid circulation loop is realized. It should be noted that a memory is integrated in the processor, and the memory stores a corresponding relationship between the second temperature value and the corresponding electronic switch valve, which is a mapping table. The method comprises the following steps: if the second temperature value is not less than-200 ℃ and greater than-80 ℃, controlling the gas circulation loop to be communicated with the inlet end, wherein the gas in the gas circulation loop is hot gas at the temperature of 80-120 ℃; if the second temperature value is not less than-80 ℃ and not more than 0 ℃, controlling the gas circulation loop to be communicated with the inlet end, wherein the gas in the gas circulation loop is hot gas at the temperature of 50-80 ℃; or controlling a liquid circulation loop to be communicated with the inlet end, wherein the liquid in the liquid circulation loop is alcohol; if the second temperature value is greater than 0 ℃ and not greater than 40 ℃, controlling the gas circulation loop to be communicated with the inlet end, wherein the gas in the gas circulation loop is air at normal temperature; or controlling a liquid circulation loop to be communicated with the inlet end, wherein the liquid in the liquid circulation loop is water at normal temperature; and if the second temperature value is greater than 40 ℃ and not greater than 200 ℃, controlling the liquid circulation loop to be communicated with the inlet end, and enabling the liquid in the liquid circulation loop to be cooling water or oil.
Further, the pressure sensor and the flow sensor are respectively electrically connected with the processor.
Through the connection mode, the linkage of the magnetic pump body and the motor is realized, namely, the temperature adjusting process of the motor can also embody the temperature adjusting effect through the monitored pressure value and flow value.
The invention also provides a control method for regulating the temperature of the motor, which comprises the following steps:
s1, acquiring a first temperature value on the surface of the inner shell, and judging whether the first temperature value exceeds a first preset threshold range;
and S2, if yes, acquiring a second temperature value on the surface of the outer shell, and controlling the corresponding gas circulation loop or liquid circulation loop to be communicated with the inlet end according to the second temperature value.
From the above description, the beneficial effects of the present invention are:
whether need carry out temperature regulation is judged through gathering the first temperature value on the interior casing surface, when first temperature value exceedes first preset threshold value scope, explain need adjust motor temperature, and acquire the second temperature value on the shell body surface again, select the most suitable temperature regulation mode according to the external environment temperature of motor promptly, not only promoted holistic intelligent degree, but also do benefit to quick adjustment motor temperature, so that the motor resumes to its best operational environment, and then performance the biggest.
Further, before step S1, the method further includes:
and S0, judging whether the intelligent motor is in the running state, if so, entering the step S1.
It can be known from the above description that the temperature is not collected at any time, nor collected as soon as the motor is powered on, but the temperature value is collected only when the intelligent motor is in a running state, that is, after the stator and the rotor start to work, so that the system resources can be optimized. Of course, the step S0 may be entered after a period of time after power-up, so as to further optimize the system resources.
Further, the first preset threshold range is 0-70 ℃.
As is apparent from the above description, the temperature adjustment process is performed only when the internal temperature of the motor is lower than 0 ℃ or higher than 70 ℃, and is not performed otherwise.
Further, in step S2, controlling the corresponding gas circulation loop or liquid circulation loop to be connected to the inlet end according to the second temperature value, specifically:
if the second temperature value is not less than-200 ℃ and greater than-80 ℃, controlling the gas circulation loop to be communicated with the inlet end, wherein the gas in the gas circulation loop is hot gas at the temperature of 80-120 ℃;
if the second temperature value is not less than-80 ℃ and not more than 0 ℃, controlling the gas circulation loop to be communicated with the inlet end, wherein the gas in the gas circulation loop is hot gas at the temperature of 50-80 ℃; or controlling a liquid circulation loop to be communicated with the inlet end, wherein the liquid in the liquid circulation loop is alcohol;
if the second temperature value is greater than 0 ℃ and not greater than 40 ℃, controlling the gas circulation loop to be communicated with the inlet end, wherein the gas in the gas circulation loop is air at normal temperature; or controlling a liquid circulation loop to be communicated with the inlet end, wherein the liquid in the liquid circulation loop is water at normal temperature;
and if the second temperature value is greater than 40 ℃ and not greater than 200 ℃, controlling the liquid circulation loop to be communicated with the inlet end, and enabling the liquid in the liquid circulation loop to be cooling water or oil.
From the above description, it can be known that the corresponding operation is executed according to which range value the second temperature value is in, so as to achieve the most suitable temperature adjusting mode. In addition, the scheme only considers the temperature of the external environment to be 200 ℃ below zero to 200 ℃ so as to sufficiently meet the actual requirement on the current market.
Further, step S2 is followed by:
s3, judging whether the current first temperature value is within a second preset threshold range, if so, controlling the gas circulation loop or the liquid circulation loop to be cut off from the inlet end; the second preset threshold range is 50-70 ℃.
As can be seen from the above description, the temperature adjusting operation is stopped when the internal temperature of the motor reaches within the range of 50 to 70 ℃.
Referring to fig. 1, a first embodiment of the present invention is:
the invention provides a magnetic pump in a low-temperature vacuum environment, which comprises a magnetic pump body 15 and a motor arranged on one side of the magnetic pump body;
an impeller 16, a rotating shaft 17 and an inner magnetic rotor 18 are arranged in the magnetic pump body 15, one end of the rotating shaft 17 is connected with the impeller 16, and the inner magnetic rotor 18 is arranged at the other end of the rotating shaft 17;
the motor comprises a front end cover 1, an inner shell 2, an outer shell 3, a rear end cover 4, a rotating shaft 5, a sealing outer shell 19 and an outer magnetic rotor 20; the inner shell 2 and the outer shell 3 are both cylindrical and have openings corresponding to the two cylindrical ends, wherein the radius of the outer shell 3 is larger than that of the inner shell 2. The outer shell 3 is sleeved outside the inner shell 2, the outer shell 3 and the inner shell 2 are coaxially arranged, the front end cover 1 is respectively connected with the opening edges of the inner shell 2 and the outer shell 3 at one ends in a sealing manner, the rear end cover 4 is respectively connected with the opening edges of the inner shell 2 and the outer shell 3 at the other ends in a sealing manner, a through hole 6 for a rotating shaft 5 to pass through is formed in the center of the front end cover 1, and the rotating shaft 5 penetrates through the through hole 6 through mechanical sealing;
the sealing shell 19 is covered on one side surface of the front end cover 1 back to the rear end cover and is in sealing connection with the front end cover 1, an external magnetic rotor 20 is arranged on the part of the rotating shaft 5 between the sealing shell 19 and the front end cover 1, and the external magnetic rotor 20 is opposite to the internal magnetic rotor 18;
The sealing shell 19 is concave, the part of the magnetic pump body corresponding to the inner magnetic rotor is embedded into the concave corresponding to the sealing shell, and a gap is formed between the magnetic pump body 15 and the sealing shell 19.
The rotor 12 is arranged on the rotating shaft 5, the stator 13 matched with the rotor is arranged on the inner side wall of the inner shell, and the rotating shaft is installed through a bearing 14.
In this embodiment, the gas in the gas circulation loop is anhydrous hot gas, and the liquid in the liquid circulation loop is water, oil or alcohol.
In this embodiment, be equipped with the installation hole site on the rear end cap, the embedding is equipped with power terminal on the installation hole site, power terminal one end is connected with the winding electricity that sets up in interior casing inside, the power terminal other end is used for with outside plug or socket looks adaptation. Specifically, the power terminal includes the lead wire, connects electrical terminal and a cylindrical injection molding body, lead wire one end and connect electrical terminal one end to inlay respectively and locate in the injection molding body and mutual welding, be equipped with the annular groove on injection molding body and the installation hole site matched with side, the embedded ring type seal that is equipped with of annular groove, the ring type seal is inconsistent with the installation hole site.
It should be noted that: the lead wire and the electric terminal are integrally formed with the injection molding body through an injection molding process, specifically, the lead wire and the electric terminal are welded firstly, and a power supply wiring terminal is formed after welding in an injection molding mode, so that the interior of the power supply wiring terminal has sealing performance, the exterior of the power supply wiring terminal is in contact with a mounting hole position on the rear end cover through the annular sealing ring to achieve a sealing effect, and the annular groove plays a role in limiting the annular sealing ring, so that the sealing stability of the power supply wiring terminal is ensured. The power supply terminals are not shown in fig. 1.
The second embodiment of the invention is as follows:
in order to improve the intelligent degree, the first embodiment is further improved, and the first embodiment specifically comprises a first thermometer 10, a second thermometer 11, a processor and an electronic switch valve; the first thermometer 10 is arranged on the surface of the inner shell 2, the second thermometer 11 is arranged on the surface of the outer shell 3, the electronic switch valve is arranged on a passage between the inlet end and the gas circulation loop or the liquid circulation loop, and the first thermometer, the second thermometer and the electronic switch valve are respectively and electrically connected with the processor. And the magnetic pump body is provided with a pressure sensor and a flow sensor. The pressure sensor and the flow sensor are respectively electrically connected with the processor. The electronic switching valves and processor are not shown in fig. 1.
The temperature control device comprises a first thermometer, a second thermometer, a processor and a gas circulation loop, wherein the first thermometer is used for collecting a first temperature value on the surface of an inner shell to judge whether temperature regulation is needed or not, if the first temperature value exceeds a first preset threshold range, the temperature of a motor needs to be regulated, and then the second thermometer is used for obtaining a second temperature value on the surface of the outer shell, namely, an optimum temperature regulation mode is selected according to the external environment temperature of the motor, and the processor analyzes the second temperature value and sends a corresponding instruction for opening an electronic switch valve, so that the opening of a passage between the inlet end and the gas circulation loop or the liquid circulation loop is realized. It should be noted that a memory is integrated in the processor, and the memory stores a corresponding relationship between the second temperature value and the corresponding electronic switch valve, which is a mapping table. The method comprises the following steps: if the second temperature value is not less than-200 ℃ and greater than-80 ℃, controlling the gas circulation loop to be communicated with the inlet end, wherein the gas in the gas circulation loop is hot gas at the temperature of 80-120 ℃; if the second temperature value is not less than-80 ℃ and not more than 0 ℃, controlling the gas circulation loop to be communicated with the inlet end, wherein the gas in the gas circulation loop is hot gas at the temperature of 50-80 ℃; or controlling a liquid circulation loop to be communicated with the inlet end, wherein the liquid in the liquid circulation loop is alcohol; if the second temperature value is greater than 0 ℃ and not greater than 40 ℃, controlling the gas circulation loop to be communicated with the inlet end, wherein the gas in the gas circulation loop is air at normal temperature; or controlling a liquid circulation loop to be communicated with the inlet end, wherein the liquid in the liquid circulation loop is water at normal temperature; and if the second temperature value is greater than 40 ℃ and not greater than 200 ℃, controlling the liquid circulation loop to be communicated with the inlet end, and enabling the liquid in the liquid circulation loop to be cooling water or oil. Through the connection mode, the linkage of the magnetic pump body and the motor is realized, namely, the temperature adjusting process of the motor can also embody the temperature adjusting effect through the monitored pressure value and flow value.
The third embodiment of the invention is as follows:
the invention provides a control method for motor temperature regulation, which comprises the following steps:
and S0, judging whether the intelligent motor is in the running state, if so, entering the step S1.
S1, acquiring a first temperature value on the surface of the inner shell, and judging whether the first temperature value exceeds a first preset threshold range; the first preset threshold range is 0-70 ℃.
And S2, if yes, acquiring a second temperature value on the surface of the outer shell, and controlling the corresponding gas circulation loop or liquid circulation loop to be communicated with the inlet end according to the second temperature value.
In step S2, controlling the corresponding gas circulation loop or liquid circulation loop to be connected to the inlet end according to the second temperature value specifically includes:
if the second temperature value is not less than-200 ℃ and greater than-80 ℃, controlling the gas circulation loop to be communicated with the inlet end, wherein the gas in the gas circulation loop is hot gas at the temperature of 80-120 ℃;
if the second temperature value is not less than-80 ℃ and not more than 0 ℃, controlling the gas circulation loop to be communicated with the inlet end, wherein the gas in the gas circulation loop is hot gas at the temperature of 50-80 ℃; or controlling a liquid circulation loop to be communicated with the inlet end, wherein the liquid in the liquid circulation loop is alcohol;
if the second temperature value is greater than 0 ℃ and not greater than 40 ℃, controlling the gas circulation loop to be communicated with the inlet end, wherein the gas in the gas circulation loop is air at normal temperature; or controlling a liquid circulation loop to be communicated with the inlet end, wherein the liquid in the liquid circulation loop is water at normal temperature;
and if the second temperature value is greater than 40 ℃ and not greater than 200 ℃, controlling the liquid circulation loop to be communicated with the inlet end, and enabling the liquid in the liquid circulation loop to be cooling water or oil.
The above description shows that the temperature is not collected at any time, nor is the temperature collected as soon as the motor is powered on, but the temperature value is collected only when the intelligent motor is in the running state, that is, after the stator and the rotor start to work, so that the system resources can be optimized. Of course, the step S0 may be entered after a period of time after power-up, so as to further optimize the system resources.
In addition, the scheme only considers the temperature of the external environment to be 200 ℃ below zero to 200 ℃ so as to sufficiently meet the actual requirement on the current market.
Optionally, step S2 is followed by:
s3, judging whether the current first temperature value is within a second preset threshold range, if so, controlling the gas circulation loop or the liquid circulation loop to be cut off from the inlet end; the second preset threshold range is 50-70 ℃. When the internal temperature of the motor reaches 50-70 ℃, the temperature adjusting operation is stopped.
In summary, the magnetic pump in the low-temperature vacuum environment provided by the invention comprises a magnetic pump body and a motor arranged on one side of the magnetic pump body, wherein an outer magnetic rotor is arranged on a part of the rotating shaft between the sealing shell and the front end cover, and the outer magnetic rotor is arranged opposite to the inner magnetic rotor; the motor realizes power transmission to the magnetic pump body through the mutual matching of the outer magnetic rotor and the inner magnetic rotor so as to drive the impeller of the magnetic pump body. In addition, through having increased the shell body on the basis of traditional motor for shell body, interior casing, front end housing and rear end cap form a inclosed annular cavity jointly for the gaseous circulation return circuit or the liquid circulation return circuit of switch-on external world reach the temperature regulation to the motor, and still design traditional motor into totally enclosed structure, specifically do: the front end cover is respectively connected with the opening edges of the inner shell and the outer shell at one end in a sealing way, the rear end cover is respectively connected with the opening edges of the inner shell and the outer shell at the other end in a sealing way, a through hole for a rotating shaft to pass through is formed in the center of the front end cover, and the rotating shaft penetrates through the through hole through mechanical sealing; the sealing shell cover is arranged on one side surface of the front end cover back to the rear end cover and is in sealing connection with the front end cover. According to the mode, the fully-closed structure is realized, and the motor is not influenced by the difference between the internal pressure and the external pressure, so that the temperature of the motor can be regulated in a vacuum environment, and meanwhile, lubricating oil can be prevented from overflowing.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent changes made by using the contents of the present specification and the drawings, or applied directly or indirectly to the related technical fields, are included in the scope of the present invention.
Claims (8)
1. The magnetic pump under the low-temperature vacuum environment is characterized by comprising a magnetic pump body and a motor arranged on one side of the magnetic pump body;
an impeller, a rotating shaft and an inner magnetic rotor are arranged in the magnetic pump body, one end of the rotating shaft is connected with the impeller, and the inner magnetic rotor is arranged at the other end of the rotating shaft;
the motor comprises a front end cover, an inner shell, an outer shell, a rear end cover, a rotating shaft, a sealing shell and an outer magnetic rotor; the inner shell and the outer shell are both cylindrical and are provided with openings corresponding to the two cylindrical ends, the outer shell is sleeved outside the inner shell and is coaxially arranged with the inner shell, the front end cover is respectively connected with the opening edge of one end of the inner shell and the opening edge of the outer shell at the other end in a sealing manner, the rear end cover is respectively connected with the opening edge of the inner shell and the opening edge of the outer shell at the other end in a sealing manner, a through hole for a rotating shaft to pass through is formed in the center of the front end cover, and the rotating shaft is arranged in the through hole in a penetrating manner through mechanical sealing manner; the sealing shell cover is arranged on one side surface of the front end cover back to the rear end cover and is in sealing connection with the front end cover, an external magnetic rotor is arranged on the part of the rotating shaft between the sealing shell and the front end cover, and the external magnetic rotor and the internal magnetic rotor are oppositely arranged;
the outer shell, the inner shell, the front end cover and the rear end cover jointly form a closed annular cavity, an inlet end and an outlet end are arranged on the outer shell, the inlet end and the outlet end are communicated with the annular cavity, and the inlet end and the outlet end are connected with an external gas circulation loop or a liquid circulation loop.
2. The magnetic pump in a low-temperature vacuum environment as claimed in claim 1, wherein the sealing housing is in a concave shape, a portion of the magnetic pump body corresponding to the inner magnetic rotor is embedded in the corresponding concave shape of the sealing housing, and a gap is formed between the magnetic pump body and the sealing housing.
3. The magnetic pump in a low-temperature vacuum environment as claimed in claim 1, wherein the magnetic pump body is provided with a pressure sensor and a flow sensor.
4. The magnetic pump in a low temperature vacuum environment as claimed in claim 1, wherein the gas in the gas circulation loop is hot anhydrous gas, and the liquid in the liquid circulation loop is water, oil or alcohol.
5. The magnetic pump in a low-temperature vacuum environment according to claim 1, wherein the rear end cap is provided with a mounting hole, a power terminal is embedded in the mounting hole, one end of the power terminal is electrically connected to the winding inside the inner housing, and the other end of the power terminal is adapted to an external plug or socket.
6. The magnetic pump in a low-temperature vacuum environment as claimed in claim 5, wherein the power terminal comprises a lead wire, an electrical terminal and a cylindrical injection molding body, one end of the lead wire and one end of the electrical terminal are respectively embedded in the injection molding body and welded to each other, a circular groove is arranged on a side surface of the injection molding body, which is matched with the mounting hole site, a circular sealing ring is embedded in the circular groove, and the circular sealing ring is abutted against the mounting hole site.
7. The magnetic pump in a low temperature vacuum environment according to claim 1, further comprising a first thermometer, a second thermometer, a processor and an electronic switch valve; the first thermometer is arranged on the surface of the inner shell, the second thermometer is arranged on the surface of the outer shell, the electronic switch valve is arranged on a passage between the inlet end and the gas circulation loop or the liquid circulation loop, and the first thermometer, the second thermometer and the electronic switch valve are respectively and electrically connected with the processor.
8. The magnetic pump in a low temperature vacuum environment as claimed in claim 7, wherein the pressure sensor and the flow sensor are electrically connected to the processor respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110482401.5A CN113153763A (en) | 2021-04-30 | 2021-04-30 | Magnetic pump under low-temperature vacuum environment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110482401.5A CN113153763A (en) | 2021-04-30 | 2021-04-30 | Magnetic pump under low-temperature vacuum environment |
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| Publication Number | Publication Date |
|---|---|
| CN113153763A true CN113153763A (en) | 2021-07-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110482401.5A Pending CN113153763A (en) | 2021-04-30 | 2021-04-30 | Magnetic pump under low-temperature vacuum environment |
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| Country | Link |
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| CN (1) | CN113153763A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002295387A (en) * | 2001-03-30 | 2002-10-09 | Sanso Electric Co Ltd | Hot water circulating pump by direct drive of brushless dc motor |
| CN201661483U (en) * | 2009-12-10 | 2010-12-01 | 江苏大学 | Variable-frequency high-speed direct-drive liquid-cooling type magnetic pump |
| CN204082682U (en) * | 2014-07-01 | 2015-01-07 | 安徽盛唐泵阀制造有限公司 | A kind of heating machanism of magnetic drive pump |
| CN111550431A (en) * | 2020-05-26 | 2020-08-18 | 福建省福安市力德泵业有限公司 | Magnetic pump |
| CN214698371U (en) * | 2021-04-30 | 2021-11-12 | 福建省福安市力德泵业有限公司 | Magnetic pump under low-temperature vacuum environment |
-
2021
- 2021-04-30 CN CN202110482401.5A patent/CN113153763A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002295387A (en) * | 2001-03-30 | 2002-10-09 | Sanso Electric Co Ltd | Hot water circulating pump by direct drive of brushless dc motor |
| CN201661483U (en) * | 2009-12-10 | 2010-12-01 | 江苏大学 | Variable-frequency high-speed direct-drive liquid-cooling type magnetic pump |
| CN204082682U (en) * | 2014-07-01 | 2015-01-07 | 安徽盛唐泵阀制造有限公司 | A kind of heating machanism of magnetic drive pump |
| CN111550431A (en) * | 2020-05-26 | 2020-08-18 | 福建省福安市力德泵业有限公司 | Magnetic pump |
| CN214698371U (en) * | 2021-04-30 | 2021-11-12 | 福建省福安市力德泵业有限公司 | Magnetic pump under low-temperature vacuum environment |
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