CN210376414U - Rotating speed measuring device of seawater desalination high-pressure pump and turbine all-in-one machine - Google Patents
Rotating speed measuring device of seawater desalination high-pressure pump and turbine all-in-one machine Download PDFInfo
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- CN210376414U CN210376414U CN201920206200.0U CN201920206200U CN210376414U CN 210376414 U CN210376414 U CN 210376414U CN 201920206200 U CN201920206200 U CN 201920206200U CN 210376414 U CN210376414 U CN 210376414U
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- main shaft
- pressure pump
- turbine
- displacement sensor
- laser displacement
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- 239000013535 sea water Substances 0.000 title claims abstract description 28
- 238000010612 desalination reaction Methods 0.000 title claims abstract description 27
- 238000006073 displacement reaction Methods 0.000 claims abstract description 23
- 238000009434 installation Methods 0.000 claims abstract description 5
- 230000009466 transformation Effects 0.000 abstract description 2
- 238000005259 measurement Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000000737 periodic effect Effects 0.000 description 3
- 230000001678 irradiating effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model relates to a rotational speed measuring device of sea water desalination high-pressure pump and turbine all-in-one, the motor spindle comprises a spindle, the main shaft is located the transparent casing, main shaft one end installation turbine wheel, the other one end installation high-pressure pump wheel of main shaft, the central point of main shaft puts along circumference processing has a plurality of profile of tooth recesses, be equipped with laser displacement sensor directly over the profile of tooth recess, laser displacement sensor and computer circuit connection. The utility model discloses a structure to the main shaft carries out special transformation, puts the processing round at main shaft central cross-section promptly and arranges even profile of tooth recess, utilizes laser displacement sensor to measure the distance between the unsmooth face of profile of tooth recess and the laser displacement sensor on the main shaft in the certain time to get the value that the data is stable in a period and carry out time domain analysis and frequency domain analysis, thereby realize calculating the purpose of the rotational speed of main shaft.
Description
Technical Field
The utility model relates to a rotational speed measuring device of sea water desalination high-pressure pump and turbine all-in-one belongs to the experimental technical field of sea water desalination all-in-one.
Background
The seawater desalination high-pressure pump and turbine integrated machine is a device which is widely applied in seawater desalination and is an important energy recovery device. The working principle is that a hydraulic turbine drives a direct drive working machine (high-pressure pump) or an auxiliary working machine (high-pressure pump) to work, the high-pressure pump increases the pressure of seawater to a certain degree so that the seawater is desalinated through a desalination membrane, and part of high-pressure water returns to the turbine to drive the turbine to run. It can be seen that the rationality of the structure of the seawater desalination high-pressure pump and turbine all-in-one machine has great influence on the running performance and stability of the all-in-one machine. The main shaft of the integrated machine is wrapped inside the high-pressure pump, the turbine and the pump shell, so that the measurement of the rotating speed of the integrated machine is difficult.
Disclosure of Invention
An object of the utility model is to provide a rotational speed measuring device of sea water desalination high-pressure pump and turbine all-in-one based on the mechanism characteristics of current sea water desalination high-pressure pump and turbine all-in-one according to rotor dynamics's relevant knowledge.
In order to realize the purpose of the utility model, the utility model adopts the technical proposal that: the utility model provides a rotational speed measuring device of sea water desalination high-pressure pump and turbine all-in-one, includes the main shaft, the main shaft is located the transparent shell, main shaft one end installation turbine wheel, the high-pressure pump wheel is installed to the other one end of main shaft, the central point of main shaft puts and has processed a plurality of profile of tooth recesses along circumference, be equipped with laser displacement sensor directly over the profile of tooth recess, laser displacement sensor and computer circuit connection.
In the above scheme, the tooth-shaped grooves are identical in shape and size and are uniformly arranged on the surface of the main shaft.
In the above scheme, the main shaft is installed in the transparent shell through a transparent shaft sleeve.
The utility model discloses still one kind utilizes the rotational speed measuring device of sea water desalination high-pressure pump and turbine all-in-one to carry out the measuring method, including following step: s1: starting the seawater desalination high-pressure pump and the turbine all-in-one machine, and vertically irradiating red visible light onto the longitudinal section of the center of the main shaft with the tooth-shaped groove (5); s2: starting the laser displacement sensor (6), transmitting distance information between the concave-convex surface of the tooth-shaped groove and the laser displacement sensor (6) to the computer (7), wherein the distance between the concave-convex surface and the sensor fluctuates back and forth, so that the recorded displacement value is periodic, the recorded displacement value is subjected to time domain analysis by selecting a fixed time period through the computer (7), and a frequency signal with displacement period change is obtained through Fourier transform, in the obtained spectrogram, the main frequency is the rotating frequency of the main shaft, and further the rotating speed of the main shaft can be obtained.
In the scheme, when the seawater desalination high-pressure pump and the turbine all-in-one machine are started, the seawater desalination high-pressure pump and the turbine all-in-one machine are operated for a period of time to ensure that the rotating speed of the seawater desalination high-pressure pump and the turbine all-in-one machine reaches a constant speed.
The utility model has the advantages that: 1. the utility model discloses a structure to the main shaft carries out special transformation, puts the processing round at main shaft central cross-section promptly and arranges even profile of tooth recess, utilizes laser displacement sensor to measure the distance between the unsmooth face of profile of tooth recess and the laser displacement sensor on the main shaft in the certain time to get the value that the data is stable in a period and carry out time domain analysis and frequency domain analysis, thereby realize calculating the purpose of the rotational speed of main shaft. 2. The technical scheme of the utility model the even running of main shaft and all-in-one is not influenced, and after whole measurement process and measurement ended simultaneously, the all-in-one can continue normal operating, need not dismantle the installation again.
Drawings
FIG. 1 is a schematic structural diagram of a seawater desalination high-pressure pump and turbine integrated machine.
Fig. 2 is a schematic view of the shafting structure.
Fig. 3 is a sectional view at a of fig. 2.
Fig. 4 is a schematic view of a laser displacement sensor mounting.
In the figure: 1. the device comprises a transparent end, 2 a transparent shell, 3 a main shaft, 4 a high-pressure pump end, 5 a main shaft tooth-shaped groove, 6 a laser displacement sensor, 7 a computer and 8 a transparent shaft sleeve.
Detailed Description
The invention is described in further detail below with reference to the figures and the specific embodiments.
Referring to the attached drawings 1, 2 and 3, the device for measuring the rotating speed of the seawater desalination high-pressure pump and the turbine all-in-one machine comprises a main shaft 3, wherein the main shaft 3 is installed in a transparent shell 2 through a transparent shaft sleeve 8, a turbine impeller 1 is installed at one end of the main shaft 3, a high-pressure pump impeller 4 is installed at the other end of the main shaft 3, a plurality of tooth-shaped grooves 5 are machined in the center of the main shaft 3 along the circumferential direction, the shape and the size of each tooth-shaped groove 5 are completely the same, and the tooth-shaped grooves are uniformly arranged on the surface of the main shaft 3 so as to prevent the main shaft 3 and even the whole seawater desalination high-pressure. As shown in fig. 4, a laser displacement sensor 6 is arranged right above the tooth-shaped groove 5, and the laser displacement sensor 6 is in circuit connection with a computer 7.
The method for measuring by using the rotating speed measuring device of the seawater desalination high-pressure pump and turbine all-in-one machine provided by the embodiment comprises the following steps: s1: when the seawater desalination high-pressure pump and the turbine all-in-one machine are started, the seawater desalination high-pressure pump and the turbine all-in-one machine are operated for a period of time to ensure that the rotating speed of the seawater desalination high-pressure pump and the turbine all-in-one machine reaches a constant speed. Vertically irradiating red visible light to the longitudinal section of the center of the main shaft with the tooth-shaped groove 5; s2: starting the laser displacement sensor 6, transmitting distance information between the concave-convex surface of the tooth-shaped groove and the laser displacement sensor 6 to the computer 7, wherein the recorded displacement value is periodic due to the back-and-forth fluctuation of the distance between the concave-convex surface and the sensor, selecting a fixed time period for time domain analysis through the computer 7, obtaining a frequency signal with periodic variation of displacement through Fourier transform, and obtaining the main frequency of the frequency signal, namely the rotation frequency of the main shaft in the obtained spectrogram, thereby obtaining the rotation speed of the main shaft.
Claims (3)
1. The utility model provides a rotational speed measuring device of sea water desalination high-pressure pump and turbine all-in-one, includes main shaft (3), main shaft (3) are located transparent shell (2), turbine impeller (1) is installed to main shaft (3) one end, main shaft (3) other one end installation high-pressure pump impeller (4), its characterized in that, the central point of main shaft (3) puts and has processed a plurality of profile of tooth recesses (5) along circumference, be equipped with laser displacement sensor (6) directly over profile of tooth recess (5), laser displacement sensor (6) and computer (7) circuit connection.
2. The rotating speed measuring device of the seawater desalination high-pressure pump and turbine integrated machine as claimed in claim 1, wherein each tooth-shaped groove (5) has the same shape and size and is uniformly arranged on the surface of the main shaft (3).
3. The rotating speed measuring device of the seawater desalination high-pressure pump and turbine integrated machine as claimed in claim 1 or 2, wherein the main shaft (3) is installed in the transparent shell (2) through a transparent shaft sleeve (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920206200.0U CN210376414U (en) | 2019-02-18 | 2019-02-18 | Rotating speed measuring device of seawater desalination high-pressure pump and turbine all-in-one machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920206200.0U CN210376414U (en) | 2019-02-18 | 2019-02-18 | Rotating speed measuring device of seawater desalination high-pressure pump and turbine all-in-one machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210376414U true CN210376414U (en) | 2020-04-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920206200.0U Expired - Fee Related CN210376414U (en) | 2019-02-18 | 2019-02-18 | Rotating speed measuring device of seawater desalination high-pressure pump and turbine all-in-one machine |
Country Status (1)
| Country | Link |
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| CN (1) | CN210376414U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109782011A (en) * | 2019-02-18 | 2019-05-21 | 江苏大学 | A kind of rotation-speed measuring device and method of sea water desalination high-pressure pump and turbine all-in-one machine |
| CN114336202A (en) * | 2022-01-05 | 2022-04-12 | 北京化工大学 | High-speed slip ring integrating pulse signals and telecommunication transmission system |
-
2019
- 2019-02-18 CN CN201920206200.0U patent/CN210376414U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109782011A (en) * | 2019-02-18 | 2019-05-21 | 江苏大学 | A kind of rotation-speed measuring device and method of sea water desalination high-pressure pump and turbine all-in-one machine |
| CN114336202A (en) * | 2022-01-05 | 2022-04-12 | 北京化工大学 | High-speed slip ring integrating pulse signals and telecommunication transmission system |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200421 |
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| CF01 | Termination of patent right due to non-payment of annual fee |