CN115585143A - Rotating speed measuring device for shielding pump set - Google Patents
Rotating speed measuring device for shielding pump set Download PDFInfo
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- CN115585143A CN115585143A CN202210981670.0A CN202210981670A CN115585143A CN 115585143 A CN115585143 A CN 115585143A CN 202210981670 A CN202210981670 A CN 202210981670A CN 115585143 A CN115585143 A CN 115585143A
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- exhaust valve
- connecting rod
- rotating speed
- connecting pipe
- hole
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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
-
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a rotating speed measuring device for a shielding pump unit, which comprises a shaft head connecting rod, an exhaust valve connecting pipe, an exhaust valve, a sensor bracket and a rotating speed sensor, wherein the tail part of a motor rotor shaft of the pump unit is provided with a threaded hole; the tail part of the shaft head connecting rod is provided with a blind hole, a built-in magnetic steel is embedded into the blind hole, and the opening end of the blind hole is welded and blocked; the lower end of the exhaust valve connecting pipe is in threaded connection with an exhaust hole in the motor top cover and is sealed through a sealing gasket, and the upper end of the exhaust valve connecting pipe is connected with an exhaust valve; the rotating speed sensor is adjacent to the exhaust valve connecting pipe and is used for detecting the rotating speed of the built-in magnetic steel. The rotating speed measuring device for the shielding pump set enables the rotating speed of the pump set to be measured conveniently and safely; not only be convenient for maintain the dismouting, can also reduce the trompil quantity on the pump package, reduce the pump package and reveal the risk.
Description
Technical Field
The invention relates to a rotating speed measuring device for a shielding pump set.
Background
The shielding pump unit is mainly used for conveying toxic and harmful media, has high requirements on the safety and reliability of the pump unit, and has important safety significance in monitoring the rotating speed of the pump unit in real time.
A photosensitive film is arranged on a pump shaft of a common centrifugal pump set, and the rotating speed of the shaft is determined by detecting the rotating speed of the photosensitive film. The shielding pump group is a fully sealed pump, and a photosensitive element cannot be mounted on a pump shaft. The pump body or the pump cover is provided with holes, the rotating speed of the pump set is measured by adopting a structure that the sensor goes deep into the pump body, and the method increases the number of the holes of the pump set, so that the leakage risk is increased. Therefore, aiming at the defects, a new rotating speed measuring method must be designed, so that the rotating speed of the pump set is convenient to measure, and the safety and the reliability of the pump set are not influenced.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides the rotating speed measuring device for the shielding pump set, so that the rotating speed of the pump set is convenient and safe to measure; not only be convenient for maintain the dismouting, can also reduce the trompil quantity on the pump package, reduce the pump package and reveal the risk.
The technical scheme for realizing the purpose is as follows: the utility model provides a rotational speed measuring device for shielding pump package, installs on the motor top cap of pump package, the exhaust hole that link up from top to bottom has been seted up on the motor top cap, rotational speed measuring device includes spindle nose connecting rod, discharge valve takeover, discharge valve, sensor support and speed sensor, wherein:
the tail part of a motor rotor shaft of the pump set is provided with a threaded hole, the head part of the shaft head connecting rod is in threaded connection with the threaded hole at the tail part of the motor rotor shaft and is fastened on the motor rotor shaft through screwing a nut, and the shaft head connecting rod rotates along with the motor rotor shaft;
the tail part of the shaft head connecting rod is provided with a blind hole, a built-in magnetic steel is embedded in the blind hole, and the open end of the blind hole is welded and blocked;
the lower end of the exhaust valve connecting pipe is in threaded connection with an exhaust hole in the motor top cover and is sealed through a sealing gasket, and the upper end of the exhaust valve connecting pipe is connected with the exhaust valve;
the tail part of the spindle head connecting rod penetrates through an exhaust hole in the top cover of the motor to be inserted into the exhaust valve connecting pipe, a water guide bearing is arranged between the middle part of the spindle head connecting rod and the exhaust hole, and a clamp spring is installed at the top end of the water guide bearing;
the sensor support is L-shaped, the transverse part of the sensor support is fixed at the top end of the motor top cover through a fastening bolt, and the rotating speed sensor is transversely arranged on the vertical part of the sensor support through a locking nut;
the rotating speed sensor is adjacent to the exhaust valve connecting pipe and is used for detecting the rotating speed of the built-in magnetic steel;
and a water return hole communicated with the exhaust hole is also formed in the top cover of the motor.
The rotating speed measuring device for the shielding pump group is characterized in that the inner wall surface of the water guide bearing is provided with a spiral groove, and the rotating angle of the spiral groove is 45-60 degrees.
The rotating speed measuring device for the shielding pump unit is characterized in that the exhaust hole in the top cover of the motor is composed of a sealing gasket mounting section, an exhaust valve connecting pipe mounting section, a snap spring mounting section, a water guide bearing mounting section and a shaft head connecting rod inserting section which are coaxially connected from top to bottom in sequence, and the inner diameters of the sealing gasket mounting section, the exhaust valve connecting pipe mounting section, the snap spring mounting section, the water guide bearing mounting section and the shaft head connecting rod inserting section are sequentially reduced;
the sealing gasket is arranged in the sealing gasket mounting section;
the lower end of the exhaust valve connecting pipe penetrates through the sealing gasket and then is in threaded connection with the exhaust valve connecting pipe mounting section;
the clamp spring is arranged in the clamp spring mounting section;
the water guide bearing is positioned in the water guide bearing mounting section;
the tail part of the shaft head connecting rod sequentially penetrates through the shaft head connecting rod inserting section, the water guide bearing, the clamp spring and the lower end of the exhaust valve connecting pipe and then is inserted into the exhaust valve connecting pipe;
a first gap is formed between the outer wall surface of the spindle nose connecting rod and the inner wall surface of the spindle nose connecting rod inserting section of the exhaust hole, a second gap is formed between the inner wall surface of the water guide bearing and the outer wall surface of the spindle nose connecting rod, a third gap is formed between the inner wall surface of the exhaust valve connecting pipe and the outer wall surface of the spindle nose connecting rod, and a fourth gap is formed between the rotating speed sensor and the outer wall surface of the exhaust valve connecting pipe.
The rotating speed measuring device for the shielding pump group is characterized in that the diameter of the water return hole is 5-6 mm; the water return hole includes the slope section and rather than the vertical section that links to each other, the slope section of water return hole with the exhaust hole links to each other.
The rotating speed measuring device for the shielding pump set enables the rotating speed of the pump set to be measured conveniently and safely; not only be convenient for maintain the dismouting, can also reduce the trompil quantity on the pump package, reduce the pump package and reveal the risk.
Drawings
Fig. 1 is a schematic structural diagram of a rotational speed measuring device for a shield pump group according to the present invention;
FIG. 2 is a schematic structural view of the spindle nose connecting rod;
FIG. 3 is a cross-sectional view of a water guide bearing;
FIG. 4 is a schematic structural view of an exhaust hole and a water return hole on a top cover of the motor;
FIG. 5 is an enlarged view of a portion A of FIG. 1;
fig. 6 is a schematic view of the installation of the rotation speed sensor.
Detailed Description
In order that those skilled in the art will better understand the technical solution of the present invention, the following detailed description is given with reference to the accompanying drawings:
referring to fig. 1 to 6, in a preferred embodiment of the present invention, a rotation speed measuring device for shielding a pump unit is mounted on a motor top cover 4 of the pump unit, the motor top cover 4 is provided with an air exhaust hole 41 penetrating up and down and a water return hole 42 (see fig. 4) communicating with the air exhaust hole, and the rotation speed measuring device includes a shaft head connecting rod 3, an air exhaust valve connecting pipe 8, an air exhaust valve 9, a sensor bracket 12 and a rotation speed sensor 10.
A threaded hole is formed in the tail part 1 of a motor rotor shaft of the pump set, mounting threads 31 are formed in the head part of a shaft head connecting rod 3, the head part of the shaft head connecting rod 3 is connected in the threaded hole in the tail part 1 of the motor rotor shaft in a threaded mode and is fastened on the motor rotor shaft through a tightening nut 2, and the shaft head connecting rod 3 rotates along with the motor rotor shaft; the tail part of the spindle head connecting rod 3 is provided with a blind hole, a built-in magnetic steel 32 is embedded into the blind hole, and the opening end of the blind hole is welded with a plug 33 (see figure 2).
The lower end of the exhaust valve connecting pipe 8 is connected in an exhaust hole 41 on the motor top cover 4 in a threaded manner and is sealed by a sealing gasket 6, and the upper end of the exhaust valve connecting pipe 8 is connected with an exhaust valve 9; the tail part of the shaft head connecting rod 3 penetrates through the exhaust hole 41 in the top cover of the motor to be inserted into the exhaust valve connecting pipe 8, the water guide bearing 5 is arranged between the middle part of the shaft head connecting rod 3 and the exhaust hole 41, and the clamp spring 7 is installed at the top end of the water guide bearing 5, so that the water guide bearing 5 can be prevented from loosening after long-term working.
The sensor support 12 is L-shaped, the transverse part of the sensor support 12 is fixed at the top end of the motor top cover 4 through a fastening bolt 13, and the rotating speed sensor 10 is transversely arranged on the vertical part of the sensor support 12 through a locking nut 11; the rotating speed sensor 10 is adjacent to the exhaust valve connecting pipe 8, and the rotating speed sensor 10 is used for detecting the rotating speed of the built-in magnetic steel 33 and further detecting the rotating speed of the shielding pump set.
In order to prevent the overlarge deflection when the spindle head connecting rod 3 rotates along with the pump, a water guide bearing 5 is embedded in an exhaust hole 41 of the top cover of the motor. Referring to fig. 3 again, in order to prevent the water guide bearing 5 from generating heat during long-term operation, a spiral groove 51 is formed on the inner wall surface of the water guide bearing 5, the rotation angle of the spiral groove 51 is 45 to 60 degrees, the rotation direction of the spiral groove 51 is favorable for the medium to move upwards along the groove, and the medium returns into the motor cavity through the water return hole 42 on the motor top cover 4.
Referring to fig. 4, the exhaust hole 41 on the top cover 4 of the motor is composed of a sealing gasket mounting section 411, an exhaust valve connecting pipe mounting section 412, a clamp spring mounting section 413, a water guide bearing mounting section 414 and a shaft head connecting rod inserting section 415 which are coaxially connected from top to bottom, and the inner diameters of the sealing gasket mounting section 411, the exhaust valve connecting pipe mounting section 412, the clamp spring mounting section 413, the water guide bearing mounting section 414 and the shaft head connecting rod inserting section 415 are sequentially reduced. Diameter of the return hole 42
Is 5mm-6 mm; the water return hole 42 includes an inclined section 421 and a vertical section 422 connected thereto, and the inclined section 421 of the water return hole 42 is connected to the exhaust valve connection pipe installation section 412 of the exhaust hole 41. To facilitate the processing of the return hole on the top cover, the angle a1 of the inclined section 421 of the return hole 42 may be set according to the structure.
According to the rotating speed measuring device for the shield pump unit, the sealing gasket 6 is arranged in the sealing gasket mounting section 411; the lower end of the exhaust valve connecting pipe 8 penetrates through the sealing gasket 6 and then is in threaded connection with the exhaust valve connecting pipe mounting section 412; the clamp spring 7 is arranged in the clamp spring mounting section 413; the water guide bearing 5 is positioned in the water guide bearing mounting section 414; the tail part of the shaft head connecting rod 3 sequentially penetrates through the shaft head connecting rod inserting section 415, the water guide bearing 5, the clamp spring 7 and the lower end of the exhaust valve connecting pipe 8 and then is inserted into the exhaust valve connecting pipe 8.
Referring to fig. 5 and 6, a first gap d1 is formed between the outer wall surface of the spindle head connecting rod 3 and the inner wall surface of the spindle head connecting rod insertion section 415 of the exhaust hole 41, a second gap d2 is formed between the inner wall surface of the water guide bearing 5 and the outer wall surface of the spindle head connecting rod 3, and a third gap d3 is formed between the inner wall surface of the exhaust valve adapter 8 and the outer wall surface of the spindle head connecting rod 3, before the pump set is started, the pump set needs to be exhausted, and the gas at the upper part of the motor enters the second gap d2 between the water guide bearing and the spindle head connecting rod and the groove width gap r1 of the spiral groove through the first gap d1 between the spindle head connecting rod 3 and the exhaust hole 41 of the motor top cover and then enters the exhaust valve 9 through the third gap d3 between the exhaust valve adapter 8 and the spindle head connecting rod 3. Because the second clearance d2 between water guide bearing 5 and spindle nose connecting rod 3 is less, has reduced pump package exhaust efficiency, just in time can compensate through the return water hole 42 on the motor top cap 4.
A fourth gap d4 is provided between the rotational speed sensor 10 and the outer wall surface of the exhaust valve connection pipe 8. The width of the fourth gap d4 is determined according to the magnetic induction type, the sensor type and the thickness of the exhaust valve connecting pipe, and it is required to ensure that the rotating speed sensor 10 does not collide with the exhaust valve connecting pipe 8 due to vibration of the pump set when the pump set works.
When the rotating speed measuring device for the shielding pump unit is used, the tail part of the shaft head connecting rod 3 is provided with the built-in magnetic steel 32, the tail part of the shaft head connecting rod 3 is positioned in the exhaust valve connecting pipe 8, the shaft head connecting rod 3 rotates along with the motor rotor shaft, the rotating speed of the built-in magnetic steel 32 in the shaft head connecting rod 3 is detected through the rotating speed sensor 20 arranged on the motor top cover 4, and then the rotation of the pump unit is determined.
The rotating speed measuring device for shielding the pump set has the advantages that the exhaust structure of the pump set is utilized, measuring holes do not need to be additionally machined on the pump set, leakage risks are reduced, the rotating speed sensor is arranged externally, and the rotating speed measuring device is convenient to assemble, disassemble and maintain. When the rotating speed sensor 10 is dismounted, the built-in spindle head connecting rod 3 does not need to be dismounted, and the performance of the pump set is not influenced. The arrangement of the water guide bearing 5 can improve the rotation stability of the spindle head connecting rod 3, prevent scraping caused by overlarge working deflection of the spindle head connecting rod, and the arrangement of the water return hole 42 can compensate the adverse effects of difficult exhaust and the like caused by the overlarge second gap d 2.
In conclusion, the rotating speed measuring device for the shielding pump set is particularly suitable for measuring the rotating speed of the shielding pump set for conveying high-pressure media and toxic and harmful media, so that the rotating speed of the pump set is convenient and safe to measure; not only be convenient for maintain the dismouting, can also reduce the trompil quantity on the pump package, reduce the pump package and reveal the risk.
It should be understood by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as a limitation of the present invention, and that changes and modifications to the above described embodiments are within the scope of the claims of the present invention as long as they are within the spirit and scope of the present invention.
Claims (4)
1. The utility model provides a rotational speed measuring device for shielding pump package, installs on the motor top cap of pump package, the exhaust hole that link up from top to bottom has been seted up on the motor top cap, its characterized in that, rotational speed measuring device includes spindle nose connecting rod, discharge valve takeover, discharge valve, sensor support and speed sensor, wherein:
the tail part of a motor rotor shaft of the pump set is provided with a threaded hole, the head part of the shaft head connecting rod is in threaded connection with the threaded hole at the tail part of the motor rotor shaft and is fastened on the motor rotor shaft through screwing a nut, and the shaft head connecting rod rotates along with the motor rotor shaft;
the tail part of the shaft head connecting rod is provided with a blind hole, a built-in magnetic steel is embedded in the blind hole, and the open end of the blind hole is welded and blocked;
the lower end of the exhaust valve connecting pipe is in threaded connection with an exhaust hole in the motor top cover and is sealed through a sealing gasket, and the upper end of the exhaust valve connecting pipe is connected with the exhaust valve;
the tail part of the spindle head connecting rod penetrates through an exhaust hole in the top cover of the motor and is inserted into the exhaust valve connecting pipe, a water guide bearing is arranged between the middle part of the spindle head connecting rod and the exhaust hole, and a clamp spring is arranged at the top end of the water guide bearing;
the sensor support is L-shaped, the transverse part of the sensor support is fixed at the top end of the motor top cover through a fastening bolt, and the rotating speed sensor is transversely arranged on the vertical part of the sensor support through a locking nut;
the rotating speed sensor is adjacent to the exhaust valve connecting pipe and is used for detecting the rotating speed of the built-in magnetic steel;
and a water return hole communicated with the exhaust hole is also formed in the top cover of the motor.
2. A rotation speed measuring device for a shield pump group according to claim 1, wherein the inner wall surface of the water guide bearing is provided with a spiral groove, and the rotation angle of the spiral groove is 45-60 °.
3. The rotating speed measuring device for the shielding pump unit according to claim 1, wherein the exhaust hole on the top cover of the motor is composed of a sealing gasket mounting section, an exhaust valve connecting pipe mounting section, a snap spring mounting section, a water guide bearing mounting section and a shaft head connecting rod inserting section which are coaxially connected from top to bottom in sequence, and the inner diameters of the sealing gasket mounting section, the exhaust valve connecting pipe mounting section, the snap spring mounting section, the water guide bearing mounting section and the shaft head connecting rod inserting section are sequentially reduced;
the sealing gasket is arranged in the sealing gasket mounting section;
the lower end of the exhaust valve connecting pipe penetrates through the sealing gasket and then is in threaded connection with the exhaust valve connecting pipe mounting section;
the clamp spring is arranged in the clamp spring mounting section;
the water guide bearing is positioned in the water guide bearing mounting section;
the tail part of the shaft head connecting rod sequentially penetrates through the shaft head connecting rod inserting section, the water guide bearing, the clamp spring and the lower end of the exhaust valve connecting pipe and then is inserted into the exhaust valve connecting pipe;
a first gap is formed between the outer wall surface of the spindle nose connecting rod and the inner wall surface of the spindle nose connecting rod inserting section of the exhaust hole, a second gap is formed between the inner wall surface of the water guide bearing and the outer wall surface of the spindle nose connecting rod, a third gap is formed between the inner wall surface of the exhaust valve connecting pipe and the outer wall surface of the spindle nose connecting rod, and a fourth gap is formed between the rotating speed sensor and the outer wall surface of the exhaust valve connecting pipe.
4. The rotating speed measuring device for the shielding pump group is characterized in that the diameter of the water return hole is 5 mm-6 mm; the water return hole includes the slope section and rather than the vertical section that links to each other, the slope section of water return hole with the exhaust hole links to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210981670.0A CN115585143A (en) | 2022-08-16 | 2022-08-16 | Rotating speed measuring device for shielding pump set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210981670.0A CN115585143A (en) | 2022-08-16 | 2022-08-16 | Rotating speed measuring device for shielding pump set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115585143A true CN115585143A (en) | 2023-01-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210981670.0A Pending CN115585143A (en) | 2022-08-16 | 2022-08-16 | Rotating speed measuring device for shielding pump set |
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| CN (1) | CN115585143A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116718793A (en) * | 2023-08-08 | 2023-09-08 | 山东鲁辰泵业有限公司 | Rotation monitor for shielding pump |
-
2022
- 2022-08-16 CN CN202210981670.0A patent/CN115585143A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116718793A (en) * | 2023-08-08 | 2023-09-08 | 山东鲁辰泵业有限公司 | Rotation monitor for shielding pump |
| CN116718793B (en) * | 2023-08-08 | 2023-10-10 | 山东鲁辰泵业有限公司 | Rotation monitor for shielding pump |
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