CN111980939A - Non-contact type measuring device and method for measuring axial play amount of main shaft of shield pump - Google Patents
Non-contact type measuring device and method for measuring axial play amount of main shaft of shield pump Download PDFInfo
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- CN111980939A CN111980939A CN202010894454.3A CN202010894454A CN111980939A CN 111980939 A CN111980939 A CN 111980939A CN 202010894454 A CN202010894454 A CN 202010894454A CN 111980939 A CN111980939 A CN 111980939A
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- main shaft
- self
- shield pump
- metal sleeve
- shield
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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
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0088—Testing machines
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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
- F04D29/00—Details, component parts, or accessories
- F04D29/04—Shafts or bearings, or assemblies thereof
- F04D29/043—Shafts
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a non-contact measuring device and a non-contact measuring method for measuring axial play of a main shaft of a shield pump. The device comprises a metal sleeve, a self-inductance coil, a transformer, a fixed capacitor and a voltage source. The metal sleeve and the self-inductance coil form the main part of the solenoid type sensor, and the main shaft of the shield pump is the mandrel of the solenoid type sensor. And obtaining the self-inductance variation according to the known output voltage, and obtaining the axial displacement through the corresponding relation between the self-inductance variation and the axial displacement of the shield pump main shaft. The self-made solenoid type sensor has the advantages of freely arranged free stroke, convenience in manufacturing and the like, and has good interchangeability in batch production, so that great convenience is brought to debugging, assembly and use in the monitoring process of the canned motor pump. When the device is used, only the solenoid type sensor is combined with the measuring circuit, and a part 'mandrel' in the solenoid type sensor is replaced by a shielding pump main shaft needing to be measured, so that non-contact measurement is skillfully realized.
Description
Technical Field
The invention relates to a non-contact measuring device and a non-contact measuring method thereof, in particular to a non-contact measuring device for measuring axial displacement of a shield pump main shaft and a non-contact measuring method for measuring the axial displacement of the shield pump main shaft.
Background
The traditional measurement mode of axial play amount of the main shaft of the canned motor pump is generally contact measurement, however, the contact measurement is easy to influence the self-running of the main shaft of the canned motor pump, and on the other hand, the error is extremely large and the use is inconvenient. The non-contact measurement can avoid the influence of the vibration of the shield pump on the measurement to a great extent, the interchangeability and the flexibility are strong, the measuring device can be manufactured into portable equipment, and pumps of the same type can be used interchangeably.
Disclosure of Invention
In order to overcome the inconvenience caused by the traditional measuring method of the axial displacement of the shield pump main shaft, the invention provides a non-contact measuring device for measuring the axial displacement of the shield pump main shaft and a non-contact measuring method for measuring the axial displacement of the shield pump main shaft.
The invention is realized by adopting the following technical scheme: a non-contact measuring device for measuring axial runout of a main shaft of a canned motor pump, the non-contact measuring device comprising:
the metal sleeve is sleeved on one end of the shield pump main shaft in a volleyball manner when the shield pump main shaft is measured;
the self-inductance coil with the self-inductance coefficient L is wound on the metal sleeve in a contact mode along the outer wall of the metal sleeve; the metal sleeve and the self-inductance coil form a main part of a solenoid type sensor, and the main shaft of the shield pump is a mandrel of the solenoid type sensor;
one end of the input side of the transformer is electrically connected with one end of the self-inductance coil;
one end of the fixed capacitor is electrically connected with the other end of the self-inductance coil;
one end of the voltage source U is electrically connected with the other end of the input side of the transformer;
wherein, according to the non-contact measurementThe quantity device derives the output voltage U of the output side of the transformer0Relationship with self-inductance change amount Δ L of the self-inductance coil:
the relationship between the self-inductance variation quantity delta L and the axial displacement quantity delta d of the shield pump main shaft is as follows:
thus, the output voltage U0And the axial play quantity Δ d is:
wherein N is the number of turns of the coil, muiIs the permeability of a magnetizer, SiIs the cross-sectional area of the magnetizer, diIn order to shield the initial overlap length of the pump and shaft and solenoid, the output voltage U is measured0Namely, the axial play quantity delta d of the shield pump main shaft is correspondingly obtained.
As a further improvement of the above solution, the non-contact measuring device further includes a fixing frame; the metal sleeve is fixed on the fixing frame, and the relative position between the metal sleeve and the shielding pump main shaft is positioned through the fixing frame.
As a further improvement of the above scheme, the non-contact measuring device further includes an extension shaft, one end of the extension shaft is fixed to the shield pump main shaft, the extension shaft is parallel to the shield pump main shaft, and the other end of the extension shaft serves as the mandrel.
As a further improvement of the above scheme, the metal sleeve is an iron cylinder.
The invention also provides a non-contact measuring device for measuring the axial displacement of the main shaft of the shield pump, which comprises:
the metal sleeve is sleeved on one end of the shield pump main shaft in a volleyball manner when the shield pump main shaft is measured;
the self-inductance coil with the self-inductance coefficient L is wound on the metal sleeve in a contact mode along the outer wall of the metal sleeve; the metal sleeve and the self-inductance coil form a main part of a solenoid type sensor, and the main shaft of the shield pump is a mandrel of the solenoid type sensor;
the amplitude modulation circuit is connected with the self-inductance coefficient in series by L, and the output voltage of the amplitude modulation circuit represents the axial displacement of the main shaft of the shield pump; or the frequency modulation circuit is connected with the self-inductance coefficient in series by L, the output frequency change of the frequency modulation circuit represents the axial displacement of the main shaft of the shield pump, and the relationship is
Wherein f is the oscillation frequency of the amplitude modulation circuit or the frequency modulation circuit, and L is the self-inductance coefficient of the self-inductance sensor.
As a further improvement of the above solution, the non-contact measuring device further includes a fixing frame; the metal sleeve is fixed on the fixing frame, and the relative position between the metal sleeve and the shielding pump main shaft is positioned through the fixing frame.
As a further improvement of the above scheme, the non-contact measuring device further includes an extension shaft, one end of the extension shaft is fixed to the shield pump main shaft, the extension shaft is parallel to the shield pump main shaft, and the other end of the extension shaft serves as the mandrel.
As a further improvement of the above scheme, the metal sleeve is an iron cylinder.
The invention also provides a non-contact measuring method for measuring the axial play amount of the main shaft of the shield pump, which comprises the following steps:
a non-contact measuring device is designed, and comprises:
the metal sleeve is sleeved on one end of the shield pump main shaft in a volleyball manner when the shield pump main shaft is measured;
the self-inductance coil with the self-inductance coefficient L is wound on the metal sleeve in a contact mode along the outer wall of the metal sleeve; the metal sleeve and the self-inductance coil form a main part of a solenoid type sensor, and the main shaft of the shield pump is a mandrel of the solenoid type sensor;
one end of the input side of the transformer is electrically connected with one end of the self-inductance coil;
one end of the fixed capacitor is electrically connected with the other end of the self-inductance coil;
one end of the voltage source U is electrically connected with the other end of the input side of the transformer;
secondly, measuring the axial displacement of the main shaft of the shield pump;
deriving an output voltage U at an output side of the transformer from the non-contact measurement device0Relationship with self-inductance change amount Δ L of the self-inductance coil:
the relationship between the self-inductance variation quantity delta L and the axial displacement quantity delta d of the shield pump main shaft is as follows:
thus, the output voltage U0And the axial play quantity Δ d is:
wherein N is the number of turns of the coil, muiIs the permeability of a magnetizer, SiIs the cross-sectional area of the magnetizer, diIn order to shield the initial overlap length of the pump and shaft and solenoid, the output voltage U is measured0Namely, the axial play quantity delta d of the shield pump main shaft is correspondingly obtained.
As a further improvement of the above solution, the non-contact measuring device further includes a fixing frame; the metal sleeve is fixed on the fixing frame, and the relative position between the metal sleeve and the shielding pump main shaft is positioned through the fixing frame.
As a further improvement of the above scheme, the non-contact measuring device further includes an extension shaft, one end of the extension shaft is fixed to the shield pump main shaft, the extension shaft is parallel to the shield pump main shaft, and the other end of the extension shaft serves as the mandrel.
As a further improvement of the above scheme, the metal sleeve is an iron cylinder.
The invention also provides a non-contact measuring method for measuring the axial play amount of the main shaft of the shield pump, which comprises the following steps:
a non-contact measuring device is designed, and comprises:
the metal sleeve is sleeved on one end of the shield pump main shaft in a volleyball manner when the shield pump main shaft is measured;
the self-inductance coil with the self-inductance coefficient L is wound on the metal sleeve in a contact mode along the outer wall of the metal sleeve; the metal sleeve and the self-inductance coil form a main part of a solenoid type sensor, and the main shaft of the shield pump is a mandrel of the solenoid type sensor;
the amplitude modulation circuit is connected with the self-inductance coefficient in series by L, and the output voltage of the amplitude modulation circuit represents the axial displacement of the main shaft of the shield pump; or the frequency modulation circuit is connected with the self-inductance coefficient in series by L, and the output frequency change of the frequency modulation circuit represents the axial displacement of the main shaft of the shield pump;
secondly, measuring the axial displacement of the main shaft of the shield pump;
and obtaining the axial movement amount of the main shaft of the shield pump according to the output voltage of the amplitude modulation circuit, or obtaining the axial movement amount of the main shaft of the shield pump according to the output frequency of the frequency modulation circuit.
As a further improvement of the above solution, the non-contact measuring device further includes a fixing frame; the metal sleeve is fixed on the fixing frame, and the relative position between the metal sleeve and the shielding pump main shaft is positioned through the fixing frame.
As a further improvement of the above scheme, the non-contact measuring device further includes an extension shaft, one end of the extension shaft is fixed to the shield pump main shaft, the extension shaft is parallel to the shield pump main shaft, and the other end of the extension shaft serves as the mandrel.
As a further improvement of the above scheme, the metal sleeve is an iron cylinder.
The non-contact measuring device is used for measuring the axial displacement of the shield pump main shaft, and has the advantages of simple structure, easy assembly, non-contact with the element to be measured in the using process, prolonged service life and no limitation of the non-contact of the element to be measured (namely the shield pump main shaft) because of the non-contact measurement, so that the convenience exists in space.
The self-made solenoid type sensor has the advantages of free stroke, random arrangement, convenience in manufacturing and the like, and has good interchangeability in batch production, so that great convenience is brought to debugging, assembly and use in the monitoring process of the canned motor pump. When the device is used, the solenoid type sensor is only required to be combined with a measuring circuit (such as a transformer, a frequency modulation circuit or a phase modulation circuit), and a component 'mandrel' in the solenoid type sensor is replaced by a shielding pump main shaft required to be measured, so that non-contact measurement is skillfully realized.
Drawings
Fig. 1 is an installation diagram of a non-contact measuring device for measuring axial play of a main shaft of a canned motor pump according to embodiment 1 of the present invention.
Fig. 2 is a schematic circuit diagram of a non-contact type measuring device for measuring axial play of a main shaft of a canned motor pump according to embodiment 1 of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1 and 2, the non-contact measuring device of the present invention is used to measure the axial play of the shield pump spindle 3. The non-contact measuring device comprises a metal sleeve 1, a self-inductance coil 2, a transformer T, a fixed capacitor C, a voltage source U and a fixing frame 4.
When the main shaft of the shield pump 3 is measured, the metal sleeve 1 is sleeved on one end of the main shaft 3 of the shield pump in a high altitude mode. In actual operation, the positioning can be performed by means of an external tool, so that the position between the metal sleeve 1 and the shield pump spindle 3 is relatively fixed. For convenience of operation, the fixing frame 4 may be designed as a part of the non-contact measuring device, so that the metal sleeve 1 may be fixed on the fixing frame 4, and the relative position between the metal sleeve 1 and the shield pump main shaft 3 is positioned by the fixing frame 4.
The self-inductance coefficient of the self-inductance coil 2 is L, and the self-inductance coil 2 is wound on the metal sleeve 1 along the outer wall of the metal sleeve 1 in a contact mode. By means of the design, the metal sleeve 1 and the self-inductance coil 2 form the main part of a solenoid type sensor, and the shield pump spindle 3 is the mandrel of the solenoid type sensor.
In addition, if the length of the shield pump main shaft 3 is not suitable for extending in the metal sleeve 1, an extension shaft (not shown) may be further provided, one end of the extension shaft is fixed on the shield pump main shaft 3 and is parallel to the shield pump main shaft 3, and the other end of the extension shaft serves as the mandrel. In the present embodiment, the metal sleeve 1 is an iron cylinder, so the mandrel can also be referred to as an iron core. The extension shaft is easy to popularize and apply, and the axial play amount of the shield pump main shaft 3 can be measured by the measuring method of the invention no matter how long the shield pump main shaft 3 is.
One end of the input side of the transformer T is electrically connected with one end of the self-inductance coil 2, the other end of the input side of the transformer T is electrically connected with one end of a voltage source U, the other end of the voltage source U is electrically connected with one end of a fixed capacitor C, and the other end of the fixed capacitor C is electrically connected with the other end of the self-inductance coil 2.
When the non-contact measuring device is used, the corresponding non-contact measuring method adopts the following steps: firstly, designing a non-contact measuring device of the embodiment; and secondly, measuring the axial displacement of the main shaft of the shield pump.
Deriving the output voltage U at the output side of the transformer T from a non-contact measuring device0The self-inductance change amount Δ L of the self-inductance coil 2 is related to: u shape0(U/2) · (. DELTA.L/L), and is thus knownOutput voltage U of0The self-inductance variation quantity delta L is obtained, the displacement of the shield pump main shaft 3 relative to the metal sleeve 1 is the axial displacement quantity of the shield pump main shaft 3, and the axial displacement quantity is obtained through the corresponding relation between the self-inductance variation quantity delta L and the axial displacement quantity of the shield pump main shaft 3. As shown in fig. 1, which is a schematic diagram of the relative position of the shield pump spindle 3 and the self-inductance coil 2, the spindle head of the shield pump spindle 3 is placed at the center of the metal sleeve 1 in the axial direction, at this time, the circuit outputs a fixed value, and when the output value changes, it indicates that the shield pump spindle 3 has play in the axial direction.
Deriving an output voltage U at an output side of the transformer from the non-contact measurement device0Relationship with self-inductance change amount Δ L of the self-inductance coil:
the relationship between the self-inductance variation quantity delta L and the axial displacement quantity delta d of the shield pump main shaft is as follows:
thus, the output voltage U0And the axial play quantity Δ d is:
wherein N is the number of turns of the coil, muiIs the permeability of a magnetizer, SiIs the cross-sectional area of the magnetizer, diIn order to shield the initial overlap length of the pump and shaft and solenoid, the output voltage U is measured0Namely, the axial play quantity delta d of the shield pump main shaft is correspondingly obtained.
In the embodiment, it is assumed that the axial displacement of the main shaft 3 of the canned motor pump is measured by using a solenoid sensor, the main shaft is used as an iron core of the solenoid sensor, an iron sleeve is sleeved outside the iron core, a coil is wound around the sleeve in a contact manner, the coil is connected with a voltage source U, a fixed capacitor C and a transformer T in series to form a loop, and after a power supply U is connected, a voltage U is arranged on the other side of the transformer0Output, voltage U0This relationship with the self-inductance variation: u shape0＝(U/2)·(△L/L)，The self-inductance variation quantity delta L and the displacement of the iron core, namely the play of the shield pump main shaft 3 have a corresponding relation, and then the jumping quantity of the shield pump main shaft 3 can be obtained.
Referring again to fig. 2, a resonant amplitude modulation circuit formed by the self-inductance coil of fig. 1 is shown. The dotted line frame is a self-inductance device which is formed by taking the shield pump main shaft 3 as an iron core and winding a coil.
In other embodiments, the transformer T, the fixed capacitor C, and the voltage source U may be replaced by a frequency modulation circuit or an amplitude modulation circuit, where the frequency modulation circuit is connected in series with the self-inductance coefficient L, and an output frequency of the frequency modulation circuit represents an axial play amount of the main shaft of the shield pump; or the phase modulation circuit is connected with the self-inductance coefficient in series by L, and the output voltage of the amplitude modulation circuit represents the axial displacement of the main shaft of the shield pump. Therefore, the axial runout amount is measured for the shield pump main shaft: the axial play amount of the main shaft of the shield pump can be obtained according to the output frequency of the frequency modulation circuit, or the axial play amount of the main shaft of the shield pump can be obtained according to the output voltage of the amplitude modulation circuit. The relationship is
Wherein f is the oscillation frequency of the amplitude modulation circuit or the frequency modulation circuit, and L is the self-inductance coefficient of the self-inductance sensor.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A non-contact measuring device for measuring axial play of a main shaft of a canned motor pump, the non-contact measuring device comprising:
the metal sleeve is sleeved on one end of the shield pump main shaft in a volleyball manner when the shield pump main shaft is measured;
the self-inductance coil with the self-inductance coefficient L is wound on the metal sleeve in a contact mode along the outer wall of the metal sleeve; the metal sleeve and the self-inductance coil form a main part of a solenoid type sensor, and the main shaft of the shield pump is a mandrel of the solenoid type sensor;
one end of the input side of the transformer is electrically connected with one end of the self-inductance coil;
one end of the fixed capacitor is electrically connected with the other end of the self-inductance coil;
one end of the voltage source U is electrically connected with the other end of the input side of the transformer;
wherein the output voltage U of the output side of the transformer is derived from the contactless measuring device0Relationship with self-inductance change amount Δ L of the self-inductance coil:
the relationship between the self-inductance variation quantity delta L and the axial displacement quantity delta d of the shield pump main shaft is as follows:
thus, the output voltage U0And the axial play quantity Δ d is:
wherein N is the number of turns of the coil, muiIs the permeability of a magnetizer, SiIs the cross-sectional area of the magnetizer, diIn order to shield the initial overlap length of the pump and shaft and solenoid, the output voltage U is measured0Namely, the axial play quantity delta d of the shield pump main shaft is correspondingly obtained.
2. A non-contact measuring device for measuring axial play of a main shaft of a canned motor pump, the non-contact measuring device comprising:
the metal sleeve is sleeved on one end of the shield pump main shaft in a volleyball manner when the shield pump main shaft is measured;
the self-inductance coil with the self-inductance coefficient L is wound on the metal sleeve in a contact mode along the outer wall of the metal sleeve; the metal sleeve and the self-inductance coil form a main part of a solenoid type sensor, and the main shaft of the shield pump is a mandrel of the solenoid type sensor;
the amplitude modulation circuit is connected with the self-inductance coefficient in series by L, and the output voltage of the amplitude modulation circuit represents the axial displacement of the main shaft of the shield pump; or the frequency modulation circuit is connected with the self-inductance coefficient in series by L, the output frequency change of the frequency modulation circuit represents the axial displacement of the main shaft of the shield pump, and the relationship is
Wherein f is the oscillation frequency of the amplitude modulation circuit or the frequency modulation circuit, and L is the self-inductance coefficient of the self-inductance sensor.
3. The non-contact measuring device for measuring the axial play amount of the main shaft of the canned motor pump according to claim 1 or 2, wherein the non-contact measuring device further comprises a fixing frame; the metal sleeve is fixed on the fixing frame, and the relative position between the metal sleeve and the shielding pump main shaft is positioned through the fixing frame.
4. The non-contact measuring device for measuring the axial play of the shield pump main shaft according to claim 1 or 2, wherein the non-contact measuring device further comprises an extension shaft, one end of the extension shaft is fixed on the shield pump main shaft, the extension shaft is parallel to the shield pump main shaft, and the other end of the extension shaft is used as the mandrel.
5. The non-contact measuring device for measuring the axial play amount of the main shaft of the canned motor pump according to claim 1 or 2, wherein the metal sleeve is an iron cylinder.
6. A non-contact measuring method for measuring axial play of a main shaft of a shield pump is characterized by comprising the following steps:
a non-contact measuring device is designed, and comprises:
the metal sleeve is sleeved on one end of the shield pump main shaft in a volleyball manner when the shield pump main shaft is measured;
the self-inductance coil with the self-inductance coefficient L is wound on the metal sleeve in a contact mode along the outer wall of the metal sleeve; the metal sleeve and the self-inductance coil form a main part of a solenoid type sensor, and the main shaft of the shield pump is a mandrel of the solenoid type sensor;
one end of the input side of the transformer is electrically connected with one end of the self-inductance coil;
one end of the fixed capacitor is electrically connected with the other end of the self-inductance coil;
one end of the voltage source U is electrically connected with the other end of the input side of the transformer;
secondly, measuring the axial displacement of the main shaft of the shield pump;
deriving an output voltage U at an output side of the transformer from the non-contact measurement device0Relationship with self-inductance change amount Δ L of the self-inductance coil:
the relationship between the self-inductance variation quantity delta L and the axial displacement quantity delta d of the shield pump main shaft is as follows:
thus, the output voltage U0And the axial play quantity Δ d is:
wherein N is the number of turns of the coil, muiIs the permeability of a magnetizer, SiIs the cross-sectional area of the magnetizer, diIn order to shield the initial overlap length of the pump and shaft and solenoid, the output voltage U is measured0Namely, the axial play quantity delta d of the shield pump main shaft is correspondingly obtained.
7. A non-contact measuring method for measuring axial play of a main shaft of a shield pump is characterized by comprising the following steps:
a non-contact measuring device is designed, and comprises:
the metal sleeve is sleeved on one end of the shield pump main shaft in a volleyball manner when the shield pump main shaft is measured;
the self-inductance coil with the self-inductance coefficient L is wound on the metal sleeve in a contact mode along the outer wall of the metal sleeve; the metal sleeve and the self-inductance coil form a main part of a solenoid type sensor, and the main shaft of the shield pump is a mandrel of the solenoid type sensor;
the amplitude modulation circuit is connected with the self-inductance coefficient in series by L, and the output voltage of the amplitude modulation circuit represents the axial displacement of the main shaft of the shield pump; or the frequency modulation circuit is connected with the self-inductance coefficient in series by L, and the output frequency change of the frequency modulation circuit represents the axial displacement of the main shaft of the shield pump;
secondly, measuring the axial displacement of the main shaft of the shield pump;
and obtaining the axial movement amount of the main shaft of the shield pump according to the output voltage of the amplitude modulation circuit, or obtaining the axial movement amount of the main shaft of the shield pump according to the output frequency of the frequency modulation circuit.
8. The non-contact measurement method for measuring the axial play amount of the main shaft of the canned motor pump according to claim 6 or 7, wherein the non-contact measurement device further comprises a holder; the metal sleeve is fixed on the fixing frame, and the relative position between the metal sleeve and the shielding pump main shaft is positioned through the fixing frame.
9. The non-contact measuring method for measuring the axial play amount of the shield pump main shaft according to claim 6 or 7, wherein the non-contact measuring device further comprises an extension shaft, one end of the extension shaft is fixed on the shield pump main shaft, the extension shaft is parallel to the shield pump main shaft, and the other end of the extension shaft is used as the mandrel.
10. The non-contact measurement method for measuring the axial play amount of the main shaft of the canned motor pump according to claim 6 or 7, wherein the metal sleeve is an iron cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010894454.3A CN111980939A (en) | 2020-08-31 | 2020-08-31 | Non-contact type measuring device and method for measuring axial play amount of main shaft of shield pump |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010894454.3A CN111980939A (en) | 2020-08-31 | 2020-08-31 | Non-contact type measuring device and method for measuring axial play amount of main shaft of shield pump |
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| CN111980939A true CN111980939A (en) | 2020-11-24 |
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| CN202010894454.3A Pending CN111980939A (en) | 2020-08-31 | 2020-08-31 | Non-contact type measuring device and method for measuring axial play amount of main shaft of shield pump |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113236580A (en) * | 2021-05-24 | 2021-08-10 | 合肥工业大学 | Self-driven sensing device for measuring rotating speed of main shaft of canned motor pump |
| CN113250975A (en) * | 2021-05-24 | 2021-08-13 | 合肥工业大学 | Detection and control device and method for axial movement of main shaft of shield pump and shield pump |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103712547A (en) * | 2014-01-07 | 2014-04-09 | 王允学 | Bearing monitor |
-
2020
- 2020-08-31 CN CN202010894454.3A patent/CN111980939A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103712547A (en) * | 2014-01-07 | 2014-04-09 | 王允学 | Bearing monitor |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113236580A (en) * | 2021-05-24 | 2021-08-10 | 合肥工业大学 | Self-driven sensing device for measuring rotating speed of main shaft of canned motor pump |
| CN113250975A (en) * | 2021-05-24 | 2021-08-13 | 合肥工业大学 | Detection and control device and method for axial movement of main shaft of shield pump and shield pump |
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Application publication date: 20201124 |