CN219432052U - Hydrogen circulating pump - Google Patents
Hydrogen circulating pump Download PDFInfo
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- CN219432052U CN219432052U CN202320347679.6U CN202320347679U CN219432052U CN 219432052 U CN219432052 U CN 219432052U CN 202320347679 U CN202320347679 U CN 202320347679U CN 219432052 U CN219432052 U CN 219432052U
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- motor
- circulation pump
- current
- hydrogen circulation
- closed coil
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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Abstract
The application provides a hydrogen circulating pump, including motor and current detection device, the motor has permanent magnet motor rotor and sets up in the stator in the permanent magnet motor rotor outside, is provided with the closed coil on the stator or between permanent magnet motor rotor and the stator, and current detection device can be according to the positive and negative circumstances of turning back of current direction instruction motor in the closed coil. This application is through setting up the closed coil between permanent magnet motor rotor and the stator or on the stator of hydrogen circulating pump, and the magnetic field can change in the permanent magnet motor rotor rotates the in-process, can produce the electric current because electromagnetic induction effect in the closed coil, and the direction of rotation of motor is different, and the direction of current in the closed coil can direct reaction motor's direction of rotation, utilizes current detection device to detect the direction of current in the closed coil and can detect the direction of rotation of motor.
Description
Technical Field
The application relates to the technical field of fuel cells, in particular to a hydrogen circulating pump.
Background
The hydrogen circulation system is one of the most important subsystems in proton exchange membrane fuel cells. The hydrogen in the hydrogen bottle enters the anode of the electric pile after passing through the pressure reducing valve and reacts with the oxygen in the cathode to generate water, and meanwhile, electric energy is generated. However, the hydrogen gas entering the anode can not be completely reacted, and after the hydrogen gas which is not completely reacted passes through the water separator, the pressure is increased by a hydrogen circulating pump (hereinafter referred to as a hydrogen pump), and the hydrogen gas enters the electric pile again to react. The hydrogen circulation system can not only improve the utilization rate of hydrogen, but also improve the water balance in the electric pile, avoid flooding, improve the working efficiency of the electric pile and prolong the service life of the electric pile.
The common hydrogen circulating pump is a Roots pump, a rotor of a permanent magnet motor drives a main rotor and a secondary rotor to rotate in a specific direction through gear transmission, and a gas transmission volume is formed between the rotor and a shell. The rotor rotates continuously to convey the gas in the gas conveying volume from the gas inlet to the gas outlet so as to achieve the purpose of compressing hydrogen. Therefore, the motor rotor must be rotated in the designed direction of rotation, otherwise the target flow and pressure rise cannot be achieved, and even oil seals and rotor damage are caused.
In the practical application process, the rotor of the hydrogen pump is reversed frequently, for example, the design link hydrogen pump and the controller have different definition on the rotation direction and phase sequence of the motor, the motor in the production and manufacturing link has wiring errors, the controller has three-phase wiring errors in the production process, the three-phase wiring harness has manufacturing errors, and the controller has software phase sequence setting errors and the like. Often, the reversal is difficult to judge, and a common method is to compare the measured performance with the designed map difference, and the hydrogen pump is required to run for a period of time and collect test data. Or the flow direction of the air flow at the inlet and the outlet of the hydrogen pump is detected, but the air flow direction is not obvious when the rotating speed is low, and the judgment can be carried out only by the higher rotating speed, so that the service life of the hydrogen pump can be influenced.
Chinese patent CN112012914B discloses a motor anti-reverse detection method, which uses electromagnetic induction effect to connect a coil on a rotor of a motor, and presumes a rotation direction of the motor through a current direction and a current magnitude on the coil. However, in the technical scheme, because the coil is arranged on the motor rotor, in order to ensure that the rotation of the motor is not influenced, an electric brush is required to be additionally arranged, the structure is relatively complex, and the reliability is poor.
Disclosure of Invention
In order to solve the technical problem, the application provides a hydrogen circulating pump, through set up the closed coil between the stator and the rotor of hydrogen circulating pump, utilize current detection device to detect the electric current on the closed coil, can accurately detect the positive and negative circumstances of rotating of motor, the closed coil sets up between electron and rotor, and the closure of coil does not receive rotor pivoted influence, simple structure, and structural reliability is high.
The application is realized by the following scheme: the application provides a hydrogen circulating pump, including motor and current detection device, the motor have permanent magnet motor rotor with set up in the stator in the permanent magnet motor rotor outside, on the stator or permanent magnet motor rotor with be provided with the closing coil between the stator, current detection device can be according to the current direction in the closing coil instructs the positive and negative rotation condition of motor. According to the hydrogen circulation pump, the closed coil is arranged between the permanent magnet motor rotor and the stator or on the stator of the hydrogen circulation pump, the magnetic field can change in the rotation process of the permanent magnet motor rotor, current can be generated in the closed coil due to the electromagnetic induction effect, the rotation directions of the motors are different, the current directions in the closed coil are different, the rotation directions of the motors can be directly reflected, and the rotation directions of the motors can be detected by detecting the current directions in the closed coil through the current detection device; meanwhile, the closed coil is arranged on the stator or between the stator and the rotor, so that the rotor of the motor can not influence the closed coil in the rotating process, and the structure reliability is high.
Preferably, the current detecting device is a light emitting diode, and the light emitting diode is connected in series on the closed coil. The LED is arranged on the closed coil, the rotating direction of the motor determines the current direction in the closed coil, and the forward and reverse rotation conditions of the motor can be judged through the luminous state of the LED. For example, when the current direction in the closing coil is the same as the conducting direction of the light emitting diode when the motor is transmitting, the light emitting diode does not emit light, which indicates that the motor is reversing; when the current direction in the closing coil is the same as the conducting direction of the light emitting diode when the motor is reversed, the light emitting diode emits light to represent the motor to be reversed.
Preferably, the light emitting diode is exposed on the housing of the hydrogen circulation pump. The LED is arranged on the shell of the hydrogen circulating pump, so that a user can intuitively judge the forward and reverse rotation conditions of the motor by observing the light-emitting conditions of the LED, and the motor can be turned off in time when the motor is reversed, thereby avoiding the adverse effect caused by the motor reversal.
Preferably, the current detection device comprises a diode and a current detector, wherein the diode is connected in series with the closed coil, and the current detector can indicate the forward and reverse rotation conditions of the motor according to the existence of current in the closed coil. The diode is arranged on the closed coil, and the current detector is used for detecting whether the current on the closed coil is present or not, so that whether the motor is inverted or not can be known. For example, when the current direction in the closed coil is the same as the conduction direction of the diode when the motor is rotating forward, detection of no current in the closed coil by the current detector means that the motor is rotating backward; when the current direction in the closed coil is opposite to the conducting direction of the diode during the forward rotation of the motor, the current detector detects that the current exists in the closed coil, which means that the motor rotates reversely.
Preferably, the current detection device comprises a diode and an alarm, wherein the alarm and the diode are connected in series on the closed coil, and the alarm sends out an alarm signal when the motor is reversed. The diode and the alarm are arranged on the closed coil, when the motor is reversed, the alarm sends out an alarm signal to prompt a user to close the hydrogen circulating pump in time, so that adverse effects caused by the motor reversal are avoided.
Preferably, the alarm is an audible and visual alarm. The alarm is preferably an audible and visual alarm, and when the motor is reversed, the audible and visual alarm gives out audible and visual signals to alarm, so that the user is reminded of the motor to be reversed, and the user can turn off the hydrogen circulating pump in time, so that the use safety is improved.
Preferably, the hydrogen circulation pump further comprises a controller configured to control the current detection device to detect the forward and reverse rotation of the motor after the hydrogen circulation pump satisfies a start condition. The hydrogen circulating pump is also provided with a controller, when the starting condition of the hydrogen circulating pump is met, the controller controls the current detection device to detect the forward and reverse rotation condition of the motor according to the current condition in the closed coil, and the forward and reverse rotation condition of the motor is detected before the hydrogen circulating pump formally works, so that adverse effects caused by motor reverse rotation after the formal operation of the motor are avoided.
Preferably, the controller is configured to control the hydrogen circulation pump to rotate at a low speed and control the current detection device to detect a forward and reverse rotation condition of the motor after the hydrogen circulation pump satisfies a start condition. After the hydrogen circulating pump meets starting conditions, the controller controls the motor to rotate at a low speed, and controls the current detection device to detect the forward and reverse rotation of the motor, because the electromagnetic induction effect is sensitive, the motor can generate current in the closed coil after rotating at a low speed, the motor is controlled to rotate at a low speed for self-checking before the hydrogen circulating pump works formally, and adverse effects caused by motor reversal after the hydrogen circulating pump works formally can be avoided.
Preferably, the controller is configured to control the hydrogen circulation pump to be turned off when the hydrogen circulation pump is reversed. The controller is further configured to control the hydrogen circulation pump to be turned off when the hydrogen circulation pump is reversed, and the controller can automatically control the hydrogen circulation pump to be turned off when the hydrogen circulation pump is reversed, so that safety accidents caused by negligence of operators are avoided.
Preferably, the motor further comprises a secondary rotor, and the permanent magnet motor rotor and the secondary rotor are 8-shaped and mutually perpendicular.
Compared with the prior art, the application has at least the following technical effects: according to the hydrogen circulation pump, the closed coil is arranged between the permanent magnet motor rotor and the stator or on the stator of the hydrogen circulation pump, the magnetic field can change in the rotation process of the permanent magnet motor rotor, current can be generated in the closed coil due to the electromagnetic induction effect, the rotation directions of the motors are different, the current directions in the closed coil are different, the rotation directions of the motors can be directly reflected, and the rotation directions of the motors can be detected by detecting the current directions in the closed coil through the current detection device; meanwhile, the closed coil is arranged on the stator or between the stator and the rotor, so that the rotor of the motor can not influence the closed coil in the rotating process, and the structure reliability is high.
Drawings
Fig. 1 is a schematic diagram of a motor normal rotation structure according to an embodiment of the present application;
fig. 2 is a schematic view of a forward rotation intake direction of a motor according to a first embodiment of the present application;
fig. 3 is a schematic diagram of a motor reversing structure according to a first embodiment of the present application;
fig. 4 is a schematic diagram of a reverse intake direction of a motor according to an embodiment of the present application;
the names of the various components marked in the figures are as follows: 1. a stator; 2. a permanent magnet motor rotor; 3. a sub-rotor; 4. a driving tooth; 5. driven teeth; 6. the coil is closed.
Detailed Description
In order to more clearly illustrate the general concepts of the present application, a detailed description is provided below by way of example in connection with the accompanying drawings.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, however, the present application may be practiced otherwise than as described herein, and thus the scope of the present application is not limited by the specific embodiments disclosed below.
In addition, in the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. The positional relationship of "upstream", "downstream" and the like is based on the positional relationship when the fluid normally flows.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In this application, unless specifically stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; the device can be mechanically connected, electrically connected and communicated; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
In this application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Embodiment one.
The hydrogen circulating pump of this embodiment is roots pump, including the motor, the motor has the casing, be provided with stator 1 and rotor in the casing, the rotor includes permanent magnet motor rotor 2 and vice rotor 3, stator 1 sets up in the outside of permanent magnet motor rotor 2, still be provided with driving tooth 4 and driven tooth 5 that a pair of transmission ratio is 1, wherein, driving tooth 4 is connected with permanent magnet motor rotor 2, driven tooth 5 is connected with vice rotor 3, permanent magnet motor rotor 2 and vice rotor 3 are 8 font rotors, mutually perpendicular sets up each other, permanent magnet motor rotor 2 rotates the in-process and drives vice rotor 3 through the cooperation between driving tooth 4 and the driven tooth 5 and rotate, the rotor can form the gas transmission volume with between the casing. The rotor rotates continuously to convey the gas in the gas conveying volume from the gas inlet to the gas outlet so as to achieve the purpose of compressing hydrogen.
In order to detect the forward and reverse rotation condition of the hydrogen circulation pump, the hydrogen circulation pump of the embodiment is further provided with a closed coil 6 and a current detection device, wherein the closed coil 6 is arranged on the permanent magnet motor rotor 2 or between the permanent magnet motor rotor 2 and the stator 1, and the current detection can indicate the forward and reverse rotation condition of the motor according to the current direction in the closed coil 6. The change of the magnetic field can occur in the rotating process of the permanent magnet motor rotor 2, and due to the electromagnetic induction effect, the change of the magnetic field can generate current in the closed coil 6, the direction of the current is related to the rotating direction of the permanent magnet motor rotor 2, and the rotating directions of the permanent magnet motor are different in the closed coil 6, so that the rotating direction of the permanent magnet motor rotor 2, namely the forward and reverse rotation condition of the motor, can be judged by judging the current directions in the closed coil 6. In addition, as the closing coil 6 is arranged on the stator 1 or between the stator 1 and the permanent magnet motor rotor 2, the closing coil 6 is not influenced in the rotation process of the permanent magnet motor rotor 2, and the structural reliability is high.
As shown in fig. 1-2, when the motor (permanent magnet motor rotor 2) rotates forward, a counter-clockwise induction current is generated in the closed coil 6, and the gas flow direction in the hydrogen circulating pump is from bottom to top. As shown in fig. 3 to 4, when the motor (permanent magnet motor rotor 2) is reversed, a clockwise induced current is generated in the closed coil 6, and the gas flow direction in the hydrogen circulating pump is from top to bottom.
In this embodiment, the current detecting device is a light emitting diode, the light emitting diode is connected in series on the closed coil 6, and the light emitting diode is exposed on the housing of the motor. By arranging the light emitting diode on the closed coil 6, the rotation direction of the motor determines the current direction in the closed coil 6, and the forward and reverse rotation conditions of the motor can be judged through the light emitting state of the light emitting diode. For example, when the current direction in the closing coil 6 is the same as the conduction direction of the light emitting diode when the motor is forward, the light emitting diode does not emit light, which indicates that the motor is reversed; when the current direction in the closing coil 6 is the same as the conduction direction of the light emitting diode when the motor is reversed, the light emitting diode emits light to represent the motor to be reversed. Meanwhile, the light emitting diode is arranged on the shell of the hydrogen circulating pump, and a user can intuitively judge the forward and reverse rotation conditions of the motor by observing the light emitting condition of the light emitting diode, so that the motor can be conveniently turned off in time when the motor is reversed, and adverse effects caused by motor reversal are avoided.
Embodiment two.
The present embodiment provides another current detection device.
In this embodiment, the current detecting device is a diode and a current detector, wherein the diode is connected in series with the closed coil 6, and the current detecting detector is capable of detecting the presence or absence of a current on the closed coil 6. Since the diode has the characteristic of unidirectional conduction, whether the motor is reversed or not can be known by detecting the presence or absence of current on the closed coil 6 by the current detector. For example, when the current direction in the closing coil 6 is the same as the conduction direction of the diode when the motor is rotating forward, the detection of no current in the closing coil 6 by the current detector means that the motor is rotating backward; when the current direction in the closing coil 6 is opposite to the conducting direction of the diode when the motor rotates forward, the current detector detects that there is current in the closing coil 6, which means that the motor rotates backward.
Other structures of this embodiment are the same as those of the first embodiment, and are not described in detail herein.
Embodiment three.
The present embodiment provides another current detection device.
In this embodiment, the current detection device is diode and alarm, and diode and alarm establish ties on closed coil 6, and the alarm can send alarm signal when the motor takes place to reverse, and wherein, the current direction in the closed coil 6 is unanimous with the direction of conduction of diode when the motor reverses, forms closed circuit in the closed coil 6 when the motor takes place to reverse, and the alarm switches on and sends alarm signal, can in time remind the operator motor to take place to reverse, avoids the adverse effect that the hydrogen circulating pump reverses and leads to.
Further, the alarm in this embodiment is preferably an audible and visual alarm, and when the motor is reversed, the audible and visual alarm sends out audible and visual signal to report to the police, reminds the user that the motor is reversed, and the user can turn off the hydrogen circulating pump in time, promotes the safety in utilization.
Other structures of this embodiment are the same as those of the first embodiment, and are not described in detail herein.
Example four.
Unlike the first to third embodiments, the hydrogen circulation pump of the present embodiment is also provided with a controller.
In this embodiment, the hydrogen circulation pump is further provided with a controller configured to control the current detection device to detect the forward and reverse rotation of the motor after the hydrogen circulation pump satisfies the start condition. When the starting condition of the hydrogen circulating pump is met, the controller controls the current detection device to detect the forward and reverse rotation condition of the motor according to the current condition in the closed coil 6, and the forward and reverse rotation condition of the motor is detected before the hydrogen circulating pump works formally, so that adverse effects caused by motor reverse rotation after the formal operation of the motor can be avoided. Further, after the hydrogen circulating pump meets the starting condition, the controller controls the hydrogen circulating pump to rotate at a low speed and controls the current detection device to detect the forward and reverse rotation condition of the motor. After the hydrogen circulating pump meets starting conditions, the controller controls the motor to rotate at a low speed, and controls the current detection device to detect the forward and reverse rotation of the motor, because the electromagnetic induction effect is sensitive, the motor can generate current in the closed coil 6 after rotating at a low speed, the motor is controlled to rotate at a low speed for self-checking before the hydrogen circulating pump works formally, and adverse effects caused by motor reversal after the hydrogen circulating pump works formally can be avoided.
Preferably, the controller is further configured to control the hydrogen circulation pump to be turned off when the hydrogen circulation pump is reversed. The controller can automatically control the hydrogen circulating pump to be closed when the hydrogen circulating pump is reversed, so that safety accidents caused by negligence of operators are avoided.
Other structures of this embodiment are the same as those of the first embodiment, and are not described in detail herein.
The foregoing description is only illustrative of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, i.e. all equivalent changes and modifications that may be made in accordance with the present utility model are covered by the appended claims, which are not intended to be construed as limiting.
Claims (10)
1. The utility model provides a hydrogen circulating pump, includes motor and current detection device, the motor have permanent magnet motor rotor with set up in the stator in the permanent magnet motor rotor outside, its characterized in that, on the stator or the permanent magnet motor rotor with be provided with the closed coil between the stator, current detection device can be according to the current direction in the closed coil instructs the positive and negative rotation condition of motor.
2. The hydrogen circulation pump of claim 1, wherein the current detection device is a light emitting diode connected in series with the closed coil.
3. The hydrogen circulation pump of claim 2, wherein the light emitting diode is exposed on a housing of the hydrogen circulation pump.
4. The hydrogen circulation pump of claim 1, wherein the current detection means comprises a diode connected in series with the closed coil and a current detector capable of indicating a forward and reverse rotation of the motor based on the presence or absence of current in the closed coil.
5. The hydrogen circulation pump of claim 1, wherein the current detection device comprises a diode and an alarm, the alarm and the diode being connected in series with the closed coil, the alarm emitting an alarm signal when the motor is reversed.
6. The hydrogen circulation pump of claim 5, wherein the alarm is an audible and visual alarm.
7. The hydrogen circulation pump of claim 1, further comprising a controller configured to control the current detection device to detect a forward and reverse rotation condition of the motor after the hydrogen circulation pump satisfies a start condition.
8. The hydrogen circulation pump of claim 7, wherein the controller is configured to control the hydrogen circulation pump to rotate at a low speed and to control the current detection device to detect a forward and reverse rotation condition of the motor after the hydrogen circulation pump satisfies a start condition.
9. The hydrogen circulation pump of claim 8, wherein the controller is configured to control the hydrogen circulation pump to shut down when the hydrogen circulation pump is inverted.
10. The hydrogen circulation pump of claim 1, wherein the motor further comprises a secondary rotor, the permanent magnet motor rotor and secondary rotor each being "figure 8" and perpendicular to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320347679.6U CN219432052U (en) | 2023-02-28 | 2023-02-28 | Hydrogen circulating pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320347679.6U CN219432052U (en) | 2023-02-28 | 2023-02-28 | Hydrogen circulating pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219432052U true CN219432052U (en) | 2023-07-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320347679.6U Active CN219432052U (en) | 2023-02-28 | 2023-02-28 | Hydrogen circulating pump |
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|---|---|
| CN (1) | CN219432052U (en) |
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2023
- 2023-02-28 CN CN202320347679.6U patent/CN219432052U/en active Active
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