CN107269519B - A kind of screw pump internal cavity pressure detection device - Google Patents
A kind of screw pump internal cavity pressure detection device Download PDFInfo
- Publication number
- CN107269519B CN107269519B CN201710366135.3A CN201710366135A CN107269519B CN 107269519 B CN107269519 B CN 107269519B CN 201710366135 A CN201710366135 A CN 201710366135A CN 107269519 B CN107269519 B CN 107269519B
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- Prior art keywords
- screw
- pressure detection
- screw pump
- internal cavity
- pump
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- 238000001514 detection method Methods 0.000 title claims abstract description 27
- 239000000523 sample Substances 0.000 claims abstract description 22
- 230000007246 mechanism Effects 0.000 claims abstract description 17
- 239000010453 quartz Substances 0.000 claims abstract description 16
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 9
- 239000010959 steel Substances 0.000 claims abstract description 9
- 238000007689 inspection Methods 0.000 claims 1
- 230000008859 change Effects 0.000 abstract description 10
- 238000005259 measurement Methods 0.000 abstract description 5
- 230000007547 defect Effects 0.000 abstract description 2
- 238000002474 experimental method Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 8
- 238000004088 simulation Methods 0.000 description 5
- 238000004458 analytical method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- 241000675108 Citrus tangerina Species 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 238000010835 comparative analysis Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
- F04C14/28—Safety arrangements; Monitoring
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
- G01L9/08—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means by making use of piezoelectric devices, i.e. electric circuits therefor
Abstract
The present invention relates to a kind of screw pump internal cavity pressure detection devices.Pressure detection mechanism of the present invention is fixed on screw pump hull outside through permanent magnet, the adjusting screw of pressure detection mechanism is connected through a screw thread rack-mount, bracket, which is connected through a screw thread, to be mounted on permanent magnet, steel ball, supporting block, piezoelectric quartz load cell, probe are mounted on internal stent, piezoelectric quartz load cell is mounted between supporting block and probe, and the internal cavity of double-suction type Quimby pump is connected with probe.The present invention overcomes the defects that the real work state that can not simulate screw pump completely leads to distortion.Structure of the invention is novel, and working principle is clear, by experimental method come the pressure change of real-time measurement screw pump internal cavity, while measuring the real-time pressure value of multiple and different airtight cavities, obtains more accurate and believable screw pump internal cavity pressure data.
Description
Technical field
The invention belongs to pressure sensing arts, in particular to a kind of screw pump internal cavity pressure detection device.
Background technique
Screw pump is mainly formed by with screw rod by the pump housing during pumped (conveying) medium and engages spatial volume variation,
It is continuous in seal chamber one by one using internal cavity pressure official post pumped (conveying) medium to change the pressure of its internal engagement cavity
Ground is axially moveable, the final purpose for realizing pumped (conveying) medium.
Therefore, the pressure change of accurate detection screw pump internal cavity as far as possible, for analyzing and improving screw pump
Transportation performance has very great meaning.
Before the present invention makes, since screw pump internal cavity is a closed space, Numerical-Mode can only be used at present
Quasi- method goes the pressure change of approximate its internal cavity of simulation study, experimentally can not measure and test
Card, and the method for this numerical simulation can not simulate the real work state of screw pump completely, so having certain distortion
Property, the analysis result according to numerical simulation removes Optimal improvements screw rod pump configuration, improves screw pump working performance purpose to reach
Effect will be very poor.Therefore Suitable assays means are found and device goes the pressure change of detection screw pump internal cavity with very heavy
Big meaning.
Summary of the invention
Present invention aim to overcome above-mentioned prior art defect, a kind of screw pump internal cavity pressure detection is proposed
Device.
The technical scheme is that:
The pressure detecting machine on screw pump is arranged in a kind of screw pump internal cavity pressure detection device, including screw pump
Structure is mainly characterized by: the pressure detection mechanism is fixed on screw pump hull outside, the pressure by permanent magnet
Testing agency includes adjusting screw, bracket, permanent magnet, steel ball, supporting block, piezoelectric quartz load cell, probe, the adjusting
Screw is connected through a screw thread rack-mount, and the bracket, which is connected through a screw thread, to be mounted on permanent magnet, the steel ball, support
Block, piezoelectric quartz load cell, probe are mounted on internal stent, and piezoelectric quartz load cell is mounted on supporting block and probe
Between, the internal cavity of double-suction type Quimby pump is connected with probe.
The screw pump is double-suction type Quimby pump.
The head diameter of the probe is 2mm.
Pressure detection mechanism is all installed in multiple and different airtight cavities of the double-suction type Quimby pump.
Advantages of the present invention and effect are structure novel, and working principle is clear, can pass through reality using the detection device
The method tested carrys out the pressure change of real-time measurement screw pump internal cavity；And this hair is installed at the multiple cavities position of screw pump
Bright pressure-detecting device can measure the real-time pressure value of multiple and different airtight cavities simultaneously, be conducive to carry out analysis ratio
Compared with.It compensates for the pressure change that can only study its internal cavity with the method for numerical simulation at present and experimental verification can not be used
Disadvantage enables us to obtain more accurate and believable screw pump internal cavity pressure data, has popularizing value.
Can be by the method for experiment come the pressure change of real-time measurement screw pump internal cavity using the present invention, making up can only use at present
The method of numerical simulation come study the pressure change of its internal cavity and can not be with experimental verification the shortcomings that, enable us to obtain
More accurate and believable screw pump internal cavity pressure data.
Detailed description of the invention
The schematic diagram of the section structure of Fig. 1 --- the present invention in double-suction type Quimby pump.
Fig. 2 --- scheme of installation of the present invention.
Fig. 3 --- measurement data output-handling principle figure of the present invention.
Each tangerine indicates that corresponding component names are as follows in figure:
Pressure detection mechanism 1 adjusts screw 1-1, bracket 1-2, permanent magnet 1-3, steel ball 1-4, supporting block 1-5, piezoelectricity stone
English load cell 1-6, probe 1-7, double-suction type Quimby pump 2, twin-screw rotor 2-1, double-suction type Quimby pump shell 2-2,
Charge amplifier 3, X-Y function recording instrument 4.
Specific embodiment
To keep the purposes, technical schemes and advantages of the invention implemented clearer, with reference to the accompanying drawings and in conjunction with the embodiments
Invention is further described in detail:
It is as shown in Figure 1-Figure 3:
The present invention include double-suction type Quimby pump 2, setting connected on the outside of double-suction type Quimby pump 2 by permanent magnet 1-3
Pressure detection mechanism 1；The pressure detection mechanism 1 includes adjusting screw 1-1, bracket 1-2, permanent magnet 1-3, steel ball 1-4, branch
Bracer 1-5, piezoelectric quartz load cell 1-6, probe 1-7, the adjusting screw 1-1, which is connected through a screw thread, is mounted on bracket 1-
On 2, the bracket 1-2, which is connected through a screw thread, to be mounted on permanent magnet 1-3, and the steel ball 1-4, supporting block 1-5, piezoelectric quartz are surveyed
Force snesor 1-6, probe 1-7 are mounted on inside bracket 1-2, and piezoelectric quartz load cell 1-6 is mounted on supporting block 1-5 and spy
Between needle 1-7, in order to improve pressure measurement accuracy as far as possible, the head diameter of the probe 1-7 is 2mm, the charge amplification
The input terminal of device 3 is connected with piezoelectric quartz load cell 1-6 by conducting wire, and the X-Y function recording instrument 4 passes through conducting wire and electricity
The output end of lotus amplifier 3 is connected.
Application process brief description of the present invention:
Permanent magnet 1-3 is mounted on the outside of the double-suction type Quimby pump shell 2-2 of double-suction type Quimby pump 2, bracket 1-2
It is connected through a screw thread and screws in inside permanent magnet 1-3, the length of screw-in should enable bracket 1-2 be embedded in double-suction type Quimby pump shell
In the neck bush of 2-2, to prevent the pumped (conveying) medium inside double-suction type Quimby pump shell 2-2 from interfering probe 1-7, measurement knot is influenced
Fruit；Then by probe 1-7 from the hole that the inner hole of bracket 1-2 is put into that double-suction type Quimby pump shell 2-2 is opened, then piezoelectricity stone
English load cell 1-6, supporting block 1-5, steel ball 1-4 are placed sequentially in above the probe 1-7 inside bracket 1-2, so that double suction
The internal cavity of formula Quimby pump 2 is connected with probe 1-7, and can be by probe 1-7 by the inside of double-suction type Quimby pump 2
Chamber pressure passes to piezoelectric quartz load cell 1-6, is thus the equal of closed in the inside of double-suction type Quimby pump 2
It is provided with sensor inside cavity, can accurately obtain the real-time pressure of its internal cavity, solves the double spiral shells of existing double-suction type
The internal cavity of bar pump 2 be closed and the problem of can not directly measure real-time pressure；It loads onto later and adjusts screw 1-1, connects
Measuring circuit is just installed.Starting double-suction type Quimby pump 2 makes it carry out normal pumped (conveying) medium work, at this time double-suction type
The internal cavity pressure of Quimby pump 2 can change, and pressure passes to piezoelectric quartz load cell 1-6 by probe 1-7,
Piezoelectric quartz load cell 1-6 can generate charge in its two apparent surface under pressure, if enabling Q is the numerical value of charge
(pC)；D is piezoelectric modulus (pC/N)；F be along crystal axial direction external force (N), then according to relational expression Q=Fd d centainly
Under the conditions of, F is bigger, then the output of charge Q is also bigger, thus converts the internal cavity real-time pressure F of double-suction type Quimby pump 2
Pressure F for the real-time output charge Q of piezoelectric quartz load cell 1-6, more more then its internal cavity of output charge Q is bigger,
Charge Q access charge amplifier 3 is exported in the form of voltage U later, so that the internal cavity of double-suction type Quimby pump 2 is real-time
Pressure F is directly proportional to the output voltage U of charge amplifier 3, then charge amplifier 3 is connected on X-Y function recording instrument 4, in this way
The voltage swing recorded on observation X-Y function recording instrument 4, side can be passed through during double-suction type Quimby pump 2 works
Just the real-time pressure of its internal airtight cavity when double-suction type Quimby pump 2 works accurately is measured.
As shown in Fig. 2, installing multiple pressure detection mechanisms 1, pressure detection mechanism 1 simultaneously on double-suction type Quimby pump 2
Arrangement be according to twin-screw rotor 2-1 helix around to rule arrangement, installed in each airtight cavity
Multiple pressure detection mechanisms 1 can both measure the real-time pressure of the multiple and different airtight cavities of double-suction type Quimby pump 2 simultaneously in this way
Force value, convenient for finding out screw pump during pumped (conveying) medium, relationship between the real-time pressure value of different airtight cavities, favorably
In carrying out analysis comparison；The pressure of different location in the same airtight cavity of a certain instantaneous double-suction type Quimby pump 2 can also be measured
Force value, convenient for the intracorporal pressure distribution situation of the same closed chamber of comparative analysis and its flow regime.If desired other portions are measured
Position pressure can also rearrange number and the position of arrangement pressure detection mechanism 1.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (2)
1. a kind of screw pump internal cavity pressure detection device, including screw pump, are arranged in the pressure detection mechanism on screw pump,
It is characterized by: the pressure-detecting device includes multiple pressure detection mechanisms, multiple pressure detection mechanisms press screw pump volume
The hand of helix of chamber is arranged on the screw rod pump housing；Pressure detection mechanism is fixed on screw pump hull outside, institute by permanent magnet
Stating pressure detection mechanism includes adjusting screw, bracket, permanent magnet, steel ball, supporting block, piezoelectric quartz load cell, probe, institute
It states and adjusts screw and be connected through a screw thread rack-mount, the bracket, which is connected through a screw thread, to be mounted on permanent magnet, the steel
Ball, supporting block, piezoelectric quartz load cell, probe are mounted on internal stent, and piezoelectric quartz load cell is mounted on support
Between block and probe, the internal cavity of double-suction type Quimby pump is connected with probe.
2. a kind of screw pump internal cavity pressure detection device according to claim 1, it is characterised in that the pressure inspection
Survey the multiple and different airtight cavities for being mounted on screw pump of mechanism and multiple positions of same airtight cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710366135.3A CN107269519B (en) | 2017-05-17 | 2017-05-17 | A kind of screw pump internal cavity pressure detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710366135.3A CN107269519B (en) | 2017-05-17 | 2017-05-17 | A kind of screw pump internal cavity pressure detection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107269519A CN107269519A (en) | 2017-10-20 |
| CN107269519B true CN107269519B (en) | 2019-03-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710366135.3A Active CN107269519B (en) | 2017-05-17 | 2017-05-17 | A kind of screw pump internal cavity pressure detection device |
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| Country | Link |
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| CN (1) | CN107269519B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112576491B (en) * | 2020-11-13 | 2022-02-11 | 珠海格力电器股份有限公司 | Signal acquisition system, compressor and air conditioner |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3215222A1 (en) * | 1982-04-23 | 1983-10-27 | Martin Theodor 6639 Rehlingen Melchior | PRESSURE MONITORING DEVICE FOR INSTALLATION IN A PIPE OR HOSE PIPE |
| US4840068A (en) * | 1988-03-14 | 1989-06-20 | Mayhew Jr John D | Pipe pressure sensor |
| CN1987389A (en) * | 2006-12-01 | 2007-06-27 | 中国矿业大学(北京) | Pressure detector for high concentrate viscose material transport pipeline |
| CN201548374U (en) * | 2009-09-25 | 2010-08-11 | 中国北车集团大连机车车辆有限公司 | Fixture for testing high-pressure oil tube |
| CN103698082A (en) * | 2013-12-12 | 2014-04-02 | 东北石油大学 | Oil extraction screw pump cavity pressure measurement device and measurement method |
| CN203603858U (en) * | 2013-12-22 | 2014-05-21 | 大庆科美达采油成套设备有限公司 | Oil production screw pump |
-
2017
- 2017-05-17 CN CN201710366135.3A patent/CN107269519B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3215222A1 (en) * | 1982-04-23 | 1983-10-27 | Martin Theodor 6639 Rehlingen Melchior | PRESSURE MONITORING DEVICE FOR INSTALLATION IN A PIPE OR HOSE PIPE |
| US4840068A (en) * | 1988-03-14 | 1989-06-20 | Mayhew Jr John D | Pipe pressure sensor |
| CN1987389A (en) * | 2006-12-01 | 2007-06-27 | 中国矿业大学(北京) | Pressure detector for high concentrate viscose material transport pipeline |
| CN201548374U (en) * | 2009-09-25 | 2010-08-11 | 中国北车集团大连机车车辆有限公司 | Fixture for testing high-pressure oil tube |
| CN103698082A (en) * | 2013-12-12 | 2014-04-02 | 东北石油大学 | Oil extraction screw pump cavity pressure measurement device and measurement method |
| CN203603858U (en) * | 2013-12-22 | 2014-05-21 | 大庆科美达采油成套设备有限公司 | Oil production screw pump |
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| Publication number | Publication date |
|---|---|
| CN107269519A (en) | 2017-10-20 |
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