CN115076127A - Direct measuring device for rotating speed of canned motor pump - Google Patents
Direct measuring device for rotating speed of canned motor pump Download PDFInfo
- Publication number
- CN115076127A CN115076127A CN202210718504.1A CN202210718504A CN115076127A CN 115076127 A CN115076127 A CN 115076127A CN 202210718504 A CN202210718504 A CN 202210718504A CN 115076127 A CN115076127 A CN 115076127A
- Authority
- CN
- China
- Prior art keywords
- canned motor
- motor pump
- end cover
- pump
- test rod
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- 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
- F04D29/08—Sealings
- F04D29/086—Sealings especially adapted for liquid pumps
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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
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid 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 provides a device for directly measuring the rotating speed of a canned motor pump, which further comprises an end cover, a test rod and a tester for sending and receiving signals to and from the test rod, wherein the test rod is arranged on a pump body of the canned motor pump, the end cover is positioned at the side end of the canned motor pump and is in threaded connection with the canned motor pump, one end of the test rod is inserted into the canned motor pump, the other end of the test rod extends towards the outer side of the end cover, and the test rod is movably connected with the end cover. This application is through connecting the test bar in canned motor pump rear end, obtains canned motor pump's rotational speed through the reflection of light signal that tester transmission laser and collection on the test bar, compares with the traditional rotational speed that reachs through induction coil indirect measurement, and this application is through the direct measurement gained to canned motor pump's rotational speed measurement, does not receive interference current or factor influences such as induction coil ageing, and this device is easy and simple to handle and operating method safety, and gained data is accurate, and application scope is wide.
Description
Technical Field
The invention relates to the technical field of canned motor pump devices, in particular to a canned motor pump rotating speed direct measurement device.
Background
Because of the totally enclosed structure of the canned motor pump, the pump is directly connected with the motor, the motor rotor is completely enclosed in the motor cavity without exposed parts, and the rotating speed of the pump cannot be directly measured. The most common measurement mode at present is to place an induction coil outside the motor at a position close to the end of the winding, and to read the current of the induction coil and convert the current into a rotating speed value, which belongs to an indirect measurement mode. Although this method is simple, the induced current signal is affected by many factors, for example, if the motor casing is too thick, the signal is weakened, other nearby electromagnetic devices also interfere with the induced current, and aging and damage of the induction coil itself also cause signal inaccuracy. In addition, when the canned motor pump is in a variable-frequency use state, the data reading accuracy of the induction coil is seriously affected, so that the conventional induction coil measuring method cannot accurately measure special pump types such as a high-pressure pump and a variable-frequency pump.
Disclosure of Invention
The invention aims to provide a device for directly measuring the rotating speed of a canned motor pump, which aims to solve the technical problem in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides a canned motor pump rotational speed direct measurement device, includes the canned motor pump, still includes end cover, test bar and to the tester of test bar signals and acceptance signal, the test bar is installed on the pump body of canned motor pump, the end cover be located canned motor pump's side and with canned motor pump looks spiro union, the one end of test bar is inserted in the canned motor pump, the other end extends to the end cover outside, test bar and end cover swing joint.
Further, turn right from a left side and be first fixed part, first connecting portion and second fixed part in proper order for the test bar, first fixed part insert to the canned motor pump in and with canned motor pump fixed connection, first connecting portion are located between canned motor pump and the end cover.
Furthermore, turn right from a left side and be first fixed part, first connecting portion and second fixed part in proper order for the test bar, first fixed part insert to the canned motor pump in and with canned motor pump fixed connection, first connecting portion are located between canned motor pump and the end cover, the second fixed part runs through the packing chamber and inserts to the end cover in.
Furthermore, the right end of the second fixing portion extends outwards to form a second connecting portion, and a reflective patch is arranged on the second connecting portion.
Further, the outer surface of the second fixing part is welded with stellite.
Furthermore, a material port is formed in the end cover, a packing cavity is formed in the end cover, the material port is located at the upper right end of the packing cavity and is communicated with the packing cavity, a check ring is arranged on the inner wall of the packing cavity, and packing is filled in the check ring.
Further, the check ring is made of a graphite packing.
Further, the filler is graphite filler, and the graphite filler is mud-like soft filler.
Further, a gland is arranged in the material opening and is in threaded connection with the end cover through a bolt.
Furthermore, the end cover is provided with a circulation hole, one end of the circulation hole is communicated with the interior of the shielding pump, and the other end of the circulation hole is communicated with the pipeline.
Further, the tachometer is a laser tachometer.
Compared with the prior art, this application is through connecting the test bar at canned motor pump rear end, obtains canned motor pump's rotational speed through tester transmission laser and collection reflection of light signal on the test bar, compares with the traditional rotational speed that reachs through induction coil indirect measurement, and this application is through direct measurement gained to canned motor pump's rotational speed measurement, does not receive interference current or induction coil factors such as ageing influence, and this device is easy and simple to handle and operating method safety, and gained data is accurate, and application scope is wide.
Drawings
FIG. 1: the usage state diagram of the invention;
FIG. 2: the invention has a structure schematic diagram;
FIG. 3: the structure of the test rod is shown schematically.
Reference numerals:
1. a canned pump; 101. a bearing; 102. a shaft sleeve; 103. a head gasket; 104. a backstop washer;
2. an end cap; 21. a material port; 22. a packing cavity; 23. a retainer ring; 24. a filler; 25. a circulation hole; 211. a gland;
3. a test bar; 31. a first fixed part; 32. a first connection portion; 33. a second fixed part; 34. a second connecting portion; 35. a light-reflecting patch; 331. stellite alloy;
4. a tester;
5. a pipeline.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
Referring to fig. 1-3, a device for directly measuring the rotation speed of a canned motor pump 1 includes a canned motor pump 1, the canned motor pump 1 is a canned motor pump 1 structure on the current market, and a bearing 101, a shaft sleeve 102, a shaft head gasket 103, and a retaining gasket 104 are disposed at the right end of the canned motor pump 1. This device still includes end cover 2, test bar 3 and to test bar 3 signals and the tester 4 of received signal, and test bar 3 installs on the pump body of canned motor pump 1, and end cover 2 is located canned motor pump 1's side and extends to the 2 outsides of end cover to the other end in canned motor pump 1 looks spiro union, the one end of test bar 3 inserts, test bar 3 and end cover 2 swing joint.
The test rod 3 is from a left side to right and is first fixed part 31, first connecting portion 32 and second fixed part 33 in proper order, first fixed part 31 insert to canned motor pump 1 in and with canned motor pump 1 fixed connection, first connecting portion 32 is located between canned motor pump 1 and end cover 2, second connecting portion 34 passes end cover 2, rotates through canned motor pump 1 and drives test rod 3 and rotate.
The tachometer is laser tachometer, and the right-hand member of second fixed part 33 outwards extends and forms second connecting portion 34, is equipped with reflection of light paster 35 on the second connecting portion 34. When the device is used, the laser tachometer is aligned to the position of the reflective patch 35 to emit laser, the reflective patch 35 of the test rod 3 receives and sends out a reflective signal, the laser tachometer can calculate the rotating speed of the test rod 3 through the reflective signal, and the obtained rotating speed is the rotating speed of the shield pump 1.
The end cover 2 is provided with a material port 21, the end cover 2 is internally provided with a packing cavity 22, the second fixing part 33 of the test rod 3 penetrates through the packing cavity 22, the right side end of the second fixing part 33 is positioned on the outer side of the end cover 2, the material port 21 is positioned at the right upper end of the packing cavity 22 and is communicated with the packing cavity 22, the inner wall of the packing cavity 22 is provided with a retainer ring 23, the retainer ring 23 is filled with packing 24, and the packing port 21 is used for filling the packing 24. Through set up packing chamber 22 in end cover 2, reduce the coefficient of friction between the rotatory in-process of test bar 3 and end cover 2 to reduce the relative motion between test bar 3 and the end cover 2, thereby reduce the influence to canned motor pump 1 rotational speed.
The check ring 23 is made of graphite packing, and the graphite packing check ring 23 is suitable for dynamic sealing under the conditions of high temperature and high pressure, and effectively prevents the packing 24 from leaking.
The packing 24 is graphite packing, and graphite packing is mud form wadding, and graphite packing has good heat conductivity and low coefficient of friction, can reduce test bar 3 and rotate the coefficient of friction between in-process and end cover 2 to reduce the accurate nature influence to the rotational speed measurement of canned motor pump 1.
Be equipped with gland 211 in the material mouth 21, gland 211 passes through the bolt and the looks spiro union of end cover 2, compresses tightly packing 24 adaptation through gland 211 and prevents that packing 24 from revealing from material mouth 21 to reduce the influence to canned motor pump 1 rotational speed measurement.
The end cover 2 is provided with a circulation hole 25, one end of the circulation hole 25 is communicated with the interior of the shield pump 1, the other end of the circulation hole 25 is communicated with the pipeline 5, and the circulation liquid of the shield pump 1 can realize backflow through the circulation hole 25 in the using process.
The working process is as follows: insert the test rod to the canned motor pump side during the use, through the screw with end cover fixed connection on the canned motor pump, the filler fills to the packing chamber through the material mouth, and the back that finishes is filled compresses tightly the filler adaptation through the gland and prevents that the filler from revealing from the material mouth. When the device is used, the laser tachometer is aligned to the position of the light-reflecting patch of the test rod to emit laser, the light-reflecting patch of the test rod receives and emits a light-reflecting signal, the laser tachometer can calculate the rotating speed of the test rod through the light-reflecting signal at the moment, and the obtained rotating speed is the rotating speed of the shielding pump
Compared with the prior art, this application is through connecting the test bar at the canned motor pump rear end, obtains canned motor pump's rotational speed through tester transmission laser and collection reflection of light signal on the test bar, compares with the traditional rotational speed that reachs through induction coil indirect measurement, and this application is through the direct measurement gained to canned motor pump's rotational speed measurement, does not receive interference current or induction coil factor influences such as ageing, and this device is easy and simple to handle and operating method safety, and gained data is accurate, and application scope is wide.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (10)
1. The utility model provides a canned motor pump rotational speed direct measurement device, includes canned motor pump, its characterized in that: the test rod is installed on the pump body of the canned motor pump, the end cover is located at the side end of the canned motor pump and is in threaded connection with the canned motor pump, one end of the test rod is inserted into the canned motor pump, the other end of the test rod extends towards the outer side of the end cover, and the test rod is movably connected with the end cover.
2. The direct shield pump speed measurement device according to claim 1, wherein: the test rod turns right from a left side and is first fixed part, first connecting portion and second fixed part in proper order, first fixed part insert to the canned motor pump in and with canned motor pump fixed connection, first connecting portion are located between canned motor pump and the end cover.
3. The direct shield pump speed measurement device according to claim 2, wherein: the right end of the second fixing portion extends outwards to form a second connecting portion, and a light-reflecting patch is arranged on the second connecting portion.
4. The direct shield pump speed measurement device according to claim 2, wherein: and the outer surface of the second fixing part is welded with stellite alloy.
5. The direct shield pump speed measurement device according to claim 1, wherein: the end cover is provided with a material port, a packing cavity is arranged in the end cover, the material port is located at the upper right end of the packing cavity and communicated with the packing cavity, a check ring is arranged on the inner wall of the packing cavity, and packing is filled in the check ring.
6. The direct shield pump speed measurement device according to claim 5, wherein: the check ring is made of a graphite packing.
7. The direct shield pump speed measurement device according to claim 5, wherein: the filler is graphite filler, and the graphite filler is mud-shaped soft filler.
8. The direct shield pump speed measurement device according to claim 5, wherein: a gland is arranged in the material opening and is in threaded connection with the end cover through a bolt.
9. The direct shield pump speed measurement device according to claim 1, wherein: and the end cover is provided with a circulation hole, one end of the circulation hole is communicated with the interior of the shielding pump, and the other end of the circulation hole is communicated with the pipeline.
10. The direct shield pump speed measurement device according to claim 1, wherein: the tachometer is a laser tachometer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210718504.1A CN115076127A (en) | 2022-06-23 | 2022-06-23 | Direct measuring device for rotating speed of canned motor pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210718504.1A CN115076127A (en) | 2022-06-23 | 2022-06-23 | Direct measuring device for rotating speed of canned motor pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115076127A true CN115076127A (en) | 2022-09-20 |
Family
ID=83255469
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210718504.1A Pending CN115076127A (en) | 2022-06-23 | 2022-06-23 | Direct measuring device for rotating speed of canned motor pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115076127A (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
- 2022-06-23 CN CN202210718504.1A patent/CN115076127A/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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