CN205156845U - A capacitanc air gap sensor for water pump motor - Google Patents
A capacitanc air gap sensor for water pump motor Download PDFInfo
- Publication number
- CN205156845U CN205156845U CN201520889081.5U CN201520889081U CN205156845U CN 205156845 U CN205156845 U CN 205156845U CN 201520889081 U CN201520889081 U CN 201520889081U CN 205156845 U CN205156845 U CN 205156845U
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- Prior art keywords
- air gap
- motor
- gap sensors
- pump motor
- probe
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- Expired - Fee Related
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- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
The utility model relates to a capacitanc air gap sensor for water pump motor, including air gap sensor probe (2), sensor control ware (4), install air gap sensor probe (2) between the deciding of motor, rotor, can decide air gap's between the rotor change in the in -process monitoring of motor operation to diagnose out in advance the latent trouble of motor. Therefore, the utility model has the advantages of as follows: 1. Thickness is little, and the installation of being convenient for can not influence water pump motor and run well, 2. Can overcome parasitic capacitance's such as sensor lead influence, 3. Can overcome the output characteristic nonlinearity, the edge effect of electric field, 4. Have stronger anti -electromagnetic interference ability, guarantee long -term reliability, stability, 5. Higher measurement accuracy has.
Description
Technical field
The utility model relates to a kind of sensor of monitoring air gap, especially relates to a kind of sensor of monitoring slight air gap between pump motor stators and rotators.
Background technology
Air gap sensors is a kind of sensor being applied to slight distance between monitoring stators and rotators.Be widely used in the monitoring of monitoring hydrogenerator stator and rotor clearance at present, but also do not apply in the monitoring of pump motor rotor air gap; And the thickness of popping one's head in current air gap sensors is at more than 1.5mm, be not also suitable for the monitoring of pump motor rotor air gap.
Utility model content
The utility model is mainly for the technical matters existing for prior art: provide a kind of air gap of monitoring in the process of work between rotor at pump motor and change, situation about being changed by air gap diagnoses the sensor of motor incipient fault.
The utility model also has an object to be solve the technical matters existing for prior art: provide one and be applied in the change of pump motor air gap, this sensor thickness is little, and monitoring gap is little, and precision is high, and antijamming capability is strong, and dynamic perfromance is good, the sensor that cost is low.
Above-mentioned technical matters of the present utility model is mainly solved by following technical proposals:
For a capacitance type air gap sensors for pump motor, comprise air gap sensors probe (2), sensor controller (4); Air gap sensors probe (2) is connected by driving cable (3) with sensor controller (4), and both are all fixed on the surface of motor stator (5), and air gap sensors probe (2) is positioned between motor rotor (1) and motor stator (5).
Described sensor controller (4) is connected with regulator (10) by transmission cable (11), regulator (10)
Be connected with computing machine.
The thickness of described air gap sensors probe (2) is below 1mm.
Described air gap sensors probe (2) is provided with high temperature lacquer protective layer.
The surface uniform of described motor stator (5) is provided with 6 air gap sensors probe (2).
The utility model tool has the following advantages:
1. profile is little, and thickness is thin, is convenient to install, and can not affect motor and run well;
2. can overcome the impact of the stray capacitances such as sensor lead;
3. output characteristics can be overcome non-linear, the edge effect of electric field;
4. there is stronger anti-electromagnetic interference capability, ensure long-term reliability, stability;
5. there is higher measuring accuracy.
Accompanying drawing explanation
Fig. 1 is that face schematic diagram is indulged in installation of the present utility model.
Fig. 2 is the structural representation that the utility model realizes Drive cable technique (prior art).
Fig. 3 is air gap sensors sonde configuration schematic diagram of the present utility model.
Fig. 4 is the schematic top plan view of installation of the present utility model.
Wherein, 1, motor rotor; 2, air gap sensors probe; 3, driving cable; 4, sensor controller; 5, motor stator; 6, protection ring; 7, capacitor fixed plate; 8, electric capacity movable plate electrode; 9 air gap sensors probe pole plates; 10, regulator; 11, transmission cable; 12, motor reel.
Embodiment
Below by embodiment, and by reference to the accompanying drawings, the technical solution of the utility model is described in further detail.
For a capacitance type air gap sensors for pump motor, comprise sensor controller 4, driving cable 3, sensor probe 2, rotor 1, stator 5, and the ground terminal on stator 5 metal shell.
Described sensor controller 4 is fixed on stator surface, and one end is on driving cable 3 connecting sensor probe 2, and one end is connected with regulator 10 by transmission cable 11, and regulator 10 is connected with computing machine.
Described driving cable 3 is a kind of cables utilizing Drive cable technique to reduce the impact of capacitance type sensor fringe field greatly.
Described sensor probe 2 is a kind of rectangular pasters; comprise protection ring 6 and air gap sensor probe pole plate 9; it is close to stator 5 on the surface, forms air-gap capacitance by sensor probe 2 and rotor 1 metal covering, and stator metal covering and rotor metal covering and the earth form coupling capacitance.
The thickness of described sensor probe 2 can accomplish below 1mm, and current probe both domestic and external is at more than 1.5mm.
Described sensor probe can measure less breath gap, can be applied on closely spaced pump motor.
Described sensor probe has been coated with one deck high temperature lacquer in its surface, and this material can effective anti-electrical Interference, can prevent probe corruption simultaneously.
Described rotor and stator, rotor is the rotary part of pump motor, and stator is the fixed part of pump motor.
Described air gap is the clearance between the motor stator rotor of monitoring in the utility model.
Described ground terminal is linked on the stator of motor, by the ground connection on stator.
The utility model utilizes the principle measuring electric capacity to carry out measuring distance, main and the sheet metal area of capacitance size between two parallel metal pole plates, distance and pole plate between medium relevant, the capacitance equation as parallel capacitor: C=ε S/4 π kd, wherein S be two plates right opposite amass; D is the distance between two plates; ε is dielectric dielectric constant between two plates; K is electrostatic force constant, and area S, dielectric constant ε in the process that air gap sensors is measured, electrostatic force constant k is constant, and the distance d between electric capacity and two plates inversely, can obtain the distance of two-plate from above-mentioned formula.
Described electric capacity refers to the electric capacity between rotor, and stator 1 is equivalent to capacitor fixed plate 7, and mover 2 is equivalent to electric capacity movable plate electrode 8; Described parallel-plate one end is the stator of motor, and the other end is the rotor of motor; Described rotor because the reasons such as the swing of axle, the expansion of rotor itself, the impact of electric system and installation misalign can cause the change of rotor distance d, thus affects the size of electric capacity C in the process run, and can obtain distance d by measurement C.
Described Drive cable technique is a kind of method eliminated stray capacitance and overcome edge effect, the fixed plate limit of parallel-plate adds the structure of protection ring, protection ring adds the driving voltage of same potential, the edge effect of middle fixed plate reduced.
Specific works process of the present utility model is: in Fig. 1, and air gap sensors probe 2 is close on motor stator 5, and air gap sensors probe 2 is linked together by driving cable 3 and sensor controller 4, as shown in Figure 1; Air gap sensors probe 2 has protection ring 6, and shape as shown in Figure 3.
During work, along with the rising of operating ambient temperature, motor rotor 1 and motor stator 5 have certain expansion, electric capacity between motor rotor 1 and motor stator 5 will change, sensor controller 4 can measure the electric capacity C between motor rotor 1 and motor stator 5, measure the C obtained in sensor controller 4 and pass to regulator 10 through transmission cable 11, after A/D conversion, become digital quantity and be sent in computing machine, computing machine can obtain distance d by the relation of plane-parallel capacitor electric capacity and distance, 6 air gap sensors probes 2 have been installed on 5, air gap shape between motor rotor 1 and motor stator 5 and distance size can be depicted by the relation of plane-parallel capacitor electric capacity and distance.By just can gathering and depict the initial conditions between motor rotor 1 and motor stator 5 above, motor is in the process run, error in vibrated, the impact of electric system, the impact of plugman's operating mode and installation process can make motor reel 12 produce certain swing, thus affect the change of the distance between motor rotor 1 and motor stator 5, can both be reflected, when rotor or stator deform Shi Douhui immediately reaction on air gap figure, the incipient fault of motor can be found as early as possible, the generation avoided a nasty accident.
Claims (5)
1. for a capacitance type air gap sensors for pump motor, it is characterized in that: comprise air gap sensors probe (2), sensor controller (4); Air gap sensors probe (2) is connected by driving cable (3) with sensor controller (4), and both are all fixed on the surface of motor stator (5), and air gap sensors probe (2) is positioned between motor rotor (1) and motor stator (5).
2. a kind of capacitance type air gap sensors for pump motor according to claim 1, it is characterized in that: described sensor controller (4) is connected with regulator (10) by transmission cable (11), regulator (10) is connected with computing machine.
3. a kind of capacitance type air gap sensors for pump motor according to claim 2, is characterized in that: the thickness of described air gap sensors probe (2) is below 1mm.
4. a kind of capacitance type air gap sensors for pump motor according to claim 3, is characterized in that: described air gap sensors probe (2) is provided with high temperature lacquer protective layer.
5. a kind of capacitance type air gap sensors for pump motor according to claim 4, is characterized in that: the surface uniform of described motor stator (5) is provided with 6 air gap sensors probe (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520889081.5U CN205156845U (en) | 2015-11-10 | 2015-11-10 | A capacitanc air gap sensor for water pump motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520889081.5U CN205156845U (en) | 2015-11-10 | 2015-11-10 | A capacitanc air gap sensor for water pump motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205156845U true CN205156845U (en) | 2016-04-13 |
Family
ID=55692528
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520889081.5U Expired - Fee Related CN205156845U (en) | 2015-11-10 | 2015-11-10 | A capacitanc air gap sensor for water pump motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205156845U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107677214A (en) * | 2017-11-03 | 2018-02-09 | 北京金风科创风电设备有限公司 | System and method for detecting air gap of generator in real time and wind generating set |
| CN109211078A (en) * | 2017-06-30 | 2019-01-15 | 佛山市顺德区美的电热电器制造有限公司 | Fault detection means and cooking apparatus are installed |
| CN109742998A (en) * | 2018-12-24 | 2019-05-10 | 维沃移动通信有限公司 | Vibration component, motor control method and terminal |
| CN110375684A (en) * | 2019-08-21 | 2019-10-25 | 华能四川水电有限公司 | A kind of hydroturbine rotor non-roundness measurement method |
-
2015
- 2015-11-10 CN CN201520889081.5U patent/CN205156845U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109211078A (en) * | 2017-06-30 | 2019-01-15 | 佛山市顺德区美的电热电器制造有限公司 | Fault detection means and cooking apparatus are installed |
| CN109211078B (en) * | 2017-06-30 | 2021-07-13 | 佛山市顺德区美的电热电器制造有限公司 | Installation failure detection device and cooking utensil |
| CN107677214A (en) * | 2017-11-03 | 2018-02-09 | 北京金风科创风电设备有限公司 | System and method for detecting air gap of generator in real time and wind generating set |
| CN109742998A (en) * | 2018-12-24 | 2019-05-10 | 维沃移动通信有限公司 | Vibration component, motor control method and terminal |
| CN110375684A (en) * | 2019-08-21 | 2019-10-25 | 华能四川水电有限公司 | A kind of hydroturbine rotor non-roundness measurement method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160413 Termination date: 20171110 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |