CN214096576U - Centrifugal pump test equipment - Google Patents
Centrifugal pump test equipment Download PDFInfo
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- CN214096576U CN214096576U CN202120371922.9U CN202120371922U CN214096576U CN 214096576 U CN214096576 U CN 214096576U CN 202120371922 U CN202120371922 U CN 202120371922U CN 214096576 U CN214096576 U CN 214096576U
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Abstract
The utility model discloses a centrifugal pump test equipment relates to centrifugal pump capability test technical field. Including air compressor, vacuum pump and liquid storage pot, and set up the liquid outlet on the liquid storage pot and go into the liquid mouth, the liquid outlet is used for the pump inlet connection with the centrifugal pump, go into the liquid mouth and be used for the pump outlet connection with the centrifugal pump, be provided with first pressure sensor and first fluidflowmeter between liquid outlet and the pump inlet, pump outlet and go into and be provided with second pressure sensor and second fluidflowmeter between the liquid mouth, air compressor respectively with the pump inlet connection of liquid storage pot and centrifugal pump, the vacuum pump is connected with the liquid storage pot, centrifugal pump test equipment still includes the motor, and with centrifugal pump complex vibration sensor, the motor passes through torque speed sensor and is connected with the centrifugal pump transmission. The operation degree of difficulty when can reducing the centrifugal pump test promotes the degree of automation of test to promote efficiency of software testing.
Description
Technical Field
The utility model relates to a centrifugal pump capability test technical field particularly, relates to a centrifugal pump test equipment.
Background
The centrifugal pump is mainly arranged in the middle of a liquid fluid pipeline to complete the driving and the transmission of fluid, the basic structure and the working principle of the centrifugal pump are simpler, but along with the increase of the control precision of equipment and instruments to a working system, the requirements of people on the state and the performance of the centrifugal pump in the working time and the influence control on pipelines or systems at the front end and the rear end of the centrifugal pump are higher and higher.
In the actual use process, due to the structural characteristics of the front end and the rear end of the centrifugal pump and the centrifugal pump, the state of liquid fluid in the process of entering and exiting the centrifugal pump can be changed, the flow speed and the pressure of the fluid in the front end system and the rear end system of the centrifugal pump can be changed in different degrees, and in order to ensure the normal use of the fluid system, the performance test of the centrifugal pump is required, so that the performance test is used for detecting whether the performance of the centrifugal pump meets the design requirements in the design and manufacture process, and meanwhile, the performance test is also used as a main basis for correctly selecting and using the centrifugal pump.
In the prior art, the energy conversion efficiency of the centrifugal pump is measured by respectively carrying out a plurality of groups of experiments through a plurality of groups of experimental devices, the test flow is complex, the test time is long, the labor intensity is high, and the test efficiency of the centrifugal pump is influenced.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a centrifugal pump test equipment can reduce the operation degree of difficulty when the centrifugal pump tests, promotes the degree of automation of test to promote efficiency of software testing.
The embodiment of the utility model is realized like this:
one aspect of the embodiment of the application provides a centrifugal pump test equipment, including air compressor, vacuum pump and liquid storage pot, and set up liquid outlet and income liquid mouth on the liquid storage pot, the liquid outlet be used for with the pump entry linkage of centrifugal pump, go into the liquid mouth be used for with the pump exit linkage of centrifugal pump, the liquid outlet with be provided with first pressure sensor and first fluidflowmeter between the pump entry, the pump export with go into and be provided with second pressure sensor and second fluidflowmeter between the liquid mouth, air compressor respectively with the liquid storage pot with the pump entry linkage of centrifugal pump, the centrifugal pump with the liquid storage pot is connected, centrifugal pump test equipment still includes the motor, and with centrifugal pump complex vibration sensor, the motor pass through torque speed sensor with the centrifugal pump transmission is connected, wherein the air compressor, the vacuum pump, the first pressure sensor, the second pressure sensor, the first liquid flow meter, the second liquid flow meter, the motor, the vibration sensor and the torque and rotation speed sensor are respectively electrically connected with a controller.
Optionally, a first electric control valve is arranged between the liquid outlet and the first pressure sensor, a second electric control valve is arranged between the second pressure sensor and the liquid inlet, and the first electric control valve and the second electric control valve are respectively electrically connected with the controller.
Optionally, the liquid outlet with connect through first connecting channel between the pump entry, pump export with go into between the liquid mouth and connect through second connecting channel, first connecting channel with be provided with differential pressure sensor between the second connecting channel, differential pressure sensor with the controller electricity is connected.
Optionally, a first on-off valve and a first filter are arranged on the first connecting channel, the first on-off valve and the first filter are located between the liquid outlet and the first electric control valve, an energy accumulator is further arranged on the first connecting channel, and the energy accumulator is located between the first electric control valve and the pump inlet.
Optionally, the air compressor is connected with a gas passage, the pump inlet is connected with the gas passage through a first gas branch, the liquid storage tank is connected with the gas passage through a second gas branch, a first control valve, a regulating valve and a gas flowmeter are arranged on the gas passage, a second control valve is arranged on the first gas branch, and a third control valve is arranged on the second gas branch.
Optionally, a fluid infusion port is further arranged on the fluid reservoir and communicated with the fluid infusion channel, and a second on-off valve and a second filter are arranged on the fluid infusion channel.
Optionally, the centrifugal pump testing equipment further comprises a pressure relief channel connected with the liquid storage tank, a safety valve is arranged on the pressure relief channel, a pressure gauge is further arranged on the pressure relief channel, and the pressure gauge is located between the safety valve and the liquid storage tank.
Optionally, the centrifugal pump test equipment further comprises an exhaust channel connected with the liquid storage tank, and an exhaust valve is arranged on the exhaust channel.
Optionally, a liquid level meter is arranged on the liquid storage tank, and a liquid discharge valve is arranged at the bottom of the liquid storage tank.
Optionally, the liquid storage tank comprises a plurality of liquid storage tanks, and the plurality of liquid storage tanks are communicated with each other.
The utility model discloses beneficial effect includes:
the centrifugal pump test equipment that this application embodiment provided, through setting up the liquid outlet on the liquid storage pot with go into the liquid mouth, the liquid outlet is used for the pump inlet connection with the centrifugal pump, goes into the liquid mouth and is used for the pump outlet connection with the centrifugal pump, when the centrifugal pump starts, can form endless circulation passageway to in the normal clear of test. Through the first pressure sensor and the first liquid flowmeter which are arranged between the liquid outlet and the pump inlet, the pressure and the flow of the liquid flowing into the centrifugal pump can be obtained. Through set up second pressure sensor and second liquid flowmeter between pump export and income liquid mouth, can reach the pressure and the flow of liquid when flowing out the centrifugal pump, again according to the density of liquid, and the pipeline internal diameter when flowing into the centrifugal pump and the pipeline internal diameter when flowing out the centrifugal pump just can obtain the lift of centrifugal pump, so that the controller is according to information such as the first pressure sensor who gathers, second pressure sensor, first liquid flowmeter, second liquid flowmeter and torque speed sensor, confirm the relation between flow and its lift, shaft power and the pump efficiency of centrifugal pump. The air compressor and the vacuum pump are respectively connected with the liquid storage tank, so that the influence of different working conditions (change of air pressure environment) on the performance of the centrifugal pump can be simulated, and the comprehensive analysis of the performance of the centrifugal pump is facilitated. The air compressor is connected with the pump inlet of the centrifugal pump, so that the centrifugal pump generates a cavitation phenomenon, and the controller acquires the vibration (jumping) condition of the vibration sensor to judge the critical point of cavitation, so as to determine the cavitation performance of the centrifugal pump. By adopting the form, the operation difficulty in the test of the centrifugal pump can be reduced, and the automation degree of the test is improved, so that the test efficiency is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is one of schematic structural diagrams of centrifugal pump testing equipment provided by an embodiment of the present invention;
fig. 2 is a second schematic structural diagram of a centrifugal pump testing apparatus according to an embodiment of the present invention;
fig. 3 is a third schematic structural diagram of a centrifugal pump testing apparatus provided in an embodiment of the present invention;
fig. 4 is a fourth schematic structural diagram of a centrifugal pump testing apparatus provided in an embodiment of the present invention;
fig. 5 is a flow chart of a testing method of the centrifugal pump according to the embodiment of the present invention.
Icon: 100-centrifugal pump test equipment; 110-an air compressor; 112-gas passages; 1122-first control valve; 1124-regulating valve; 1126-gas flow meter; 114-a first gas branch; 1142-a second control valve; 116-a second gas branch; 1162-a third control valve; 120-a vacuum pump; 130-a liquid storage tank; 131-a liquid outlet; 1312-a first pressure sensor; 1314-a first liquid flow meter; 1316 — a first electrically controlled valve; 132-a liquid inlet; 1322-a second pressure sensor; 1324-a second liquid flow meter; 1326-a second electrically controlled valve; 134-an exhaust channel; 1342-an exhaust valve; 135-a liquid level meter; 136-drain valve; 140-a centrifugal pump; 142-a vibration sensor; 150-an electric motor; 152-a torque rotational speed sensor; 160-first connecting channel; 162-differential pressure sensor; 164-a first on-off valve; 166-a first filter; 168-an accumulator; 170-a second connecting channel; 180-fluid infusion channel; 182-a second on-off valve; 184-a second filter; 190-a pressure relief channel; 192-a safety valve; 194-pressure gauge.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1, the present embodiment provides a centrifugal pump testing apparatus 100, which includes an air compressor 110, a vacuum pump 120, a liquid storage tank 130, a liquid outlet 131 and a liquid inlet 132 disposed on the liquid storage tank 130, the liquid outlet 131 is used for connecting with a pump inlet of the centrifugal pump 140, the liquid inlet 132 is used for connecting with a pump outlet of the centrifugal pump 140, a first pressure sensor 1312 and a first liquid flow meter 1314 are disposed between the liquid outlet 131 and the pump inlet, a second pressure sensor 1322 and a second liquid flow meter 1324 are disposed between the pump outlet and the liquid inlet 132, the air compressor 110 is respectively connected with the pump inlets of the liquid storage tank 130 and the centrifugal pump 140, the vacuum pump 120 is connected with the liquid storage tank 130, the centrifugal pump testing apparatus 100 further includes an electric motor 150 and a vibration sensor 142 matched with the centrifugal pump 140, the electric motor 150 is in transmission connection with the centrifugal pump 140 through a torque rotation speed sensor 152, wherein, the air compressor 110, the vacuum pump 120, the first pressure sensor 1312, the second pressure sensor 1322, the first liquid flow meter 1314, the second liquid flow meter 1324, the motor 150, the vibration sensor 142, and the torque and rotation speed sensor 152 are electrically connected to the controller, respectively.
Specifically, the centrifugal pump test equipment 100 provided by the embodiment of the application can simultaneously perform the performance test of the centrifugal pump 140 and the cavitation test of the centrifugal pump 140, and the equipment does not need to be replaced in the test process. When the performance test of the centrifugal pump 140 is performed, the rotation speed of the motor 150 can be controlled by the controller, so as to collect parameters such as the inlet and outlet flow rates (i.e. data of the first liquid flow meter 1314 and the second liquid flow meter 1324) of the centrifugal pump 140, the inlet and outlet pressures (i.e. data of the first pressure sensor 1312 and the second pressure sensor 1322) of the centrifugal pump 140, the rotation speed and the torque (i.e. data of the torque and rotation speed sensor 152) of the centrifugal pump 140 under different rotation speed working conditions, and flow-lift, flow-shaft power and flow-pump efficiency curves can be obtained through the parameters, so that the experimental data are more intuitive. The air compressor 110 or the vacuum pump 120 may also be controlled by the controller to adjust the air pressure in the reservoir 130, so as to simulate the operation conditions of the centrifugal pump 140 under different air pressure environments, and to measure the performance of the centrifugal pump 140 by collecting data information of the centrifugal pump 140 under different air pressure conditions.
When a cavitation experiment of the centrifugal pump 140 is performed, the centrifugal pump 140 is normally started, after the operation is stable, the controller controls the air compressor 110 to mix air into the pump inlet of the centrifugal pump 140, the cavitation phenomenon measurement can be realized by mounting the vibration sensor 142 on the centrifugal pump 140 or the input shaft, when the centrifugal pump 140 generates the cavitation phenomenon, the vibration (bounce) of the pump body or the input shaft of the centrifugal pump 140 is remarkably increased, and the arrival of the cavitation can be judged through the sharp change of the vibration speed or the amplitude of the pump body or the input shaft monitored by the vibration sensor 142. Thereby determining the operation of the centrifugal pump 140 when the cavitation phenomenon occurs. In the above form, the centrifugal pump 140 energy conversion efficiency at different air pressures, and the boundary condition for the occurrence of the centrifugal pump 140 cavitation margin. The relation between the flow of the centrifugal pump 140 and the lift, the shaft power and the pump efficiency thereof is determined by collecting and processing parameters such as actual flow, inlet and outlet pressure, torque and rotating speed which are measured under different working conditions.
It should be noted that, when the inlet pressure of the centrifugal pump 140 is greater than the atmospheric pressure, the lift of the centrifugal pump 140 can be obtained by the following formula (the test pipeline is a straight pipeline with a constant circular cross section and no obstruction):
when the inlet pressure of the centrifugal pump 140 is less than the atmospheric pressure, the lift of the centrifugal pump 140 can be obtained by the following formula:
in the above formula, H represents the head, P1Indicating the first pressure sensor 1312 pressure, P2Indicating the pressure of the second pressure sensor 1322, ρ indicating the density of the fluid within the reservoir 130, g indicating the acceleration of gravity, and Z1Denotes the vertical height, Z, from the center of the centrifugal pump 140 at the first pressure sensor 13122Represents the vertical height, V, from the center of the centrifugal pump 140 at the second pressure sensor 13221Indicates the average velocity, V, of the water flow in the line at the measurement location of the first pressure sensor 13122Indicating the average velocity, Q, of the water flow in the line at the location of measurement by the second pressure sensor 13221Indicates the flow rate, Q, of the first fluid flow meter 13142Indicates the flow rate, d, of the second fluid flow meter 13241Indicates the inner diameter of the pipe at the measurement site of the first pressure sensor 1312, d2Showing the second pressure sensor 1322 measuring the internal diameter of the line at that location.
The shaft power of centrifugal pump 140 can be derived by the following equation (shaft power is the power delivered by motor 150 to centrifugal pump 140):
in the above equation, P represents shaft power, M represents torque, and n represents rotational speed, where torque and rotational speed are known from torque rotational speed sensor 152.
The pump efficiency of the centrifugal pump 140 can be obtained by the following equation:
in the above formula, Pu represents the effective power of the centrifugal pump 140, η represents the pump efficiency, and the pump efficiency of the centrifugal pump 140 can be obtained by combining the formula (1), the formula (4) and the formula (5) with the formula (6) and the formula (7).
Specifically, since the centrifugal pump 140 operates to deliver the fluid, i.e., the energy of the fluid as it passes through the centrifugal pump 140 changes, the change can be expressed in terms of the energy per unit time that the fluid passes through the pump. The motor 150 delivers power to the pump which, through some loss, delivers it to the liquid, and therefore the pump efficiency of the centrifugal pump 140 can be derived using the above calculations.
The centrifugal pump test equipment 100 provided by the embodiment of the application is characterized in that the liquid outlet 131 and the liquid inlet 132 are arranged on the liquid storage tank 130, the liquid outlet 131 is connected with the pump inlet of the centrifugal pump 140, the liquid inlet 132 is connected with the pump outlet of the centrifugal pump 140, and when the centrifugal pump 140 is started, a circulating flow channel can be formed so as to facilitate the normal operation of the test. The pressure and flow rate of the liquid flowing into the centrifugal pump 140 can be obtained by a first pressure sensor 1312 and a first liquid flow meter 1314 which are arranged between the liquid outlet 131 and the pump inlet. By arranging the second pressure sensor 1322 and the second liquid flow meter 1324 between the pump outlet and the liquid inlet 132, the pressure and the flow rate of the liquid flowing out of the centrifugal pump 140 can be obtained, and then the lift of the centrifugal pump 140 can be obtained according to the density of the liquid, the inner diameter of the pipeline flowing into the centrifugal pump 140 and the inner diameter of the pipeline flowing out of the centrifugal pump 140, so that the controller can determine the relationship between the flow rate of the centrifugal pump 140 and the lift, the shaft power and the pump efficiency thereof according to the collected information of the first pressure sensor 1312, the second pressure sensor 1322, the first liquid flow meter 1314, the second liquid flow meter 1324, the torque and rotation speed sensor 152 and the like. By connecting the air compressor 110 and the vacuum pump 120 with the liquid storage tank 130, the influence on the performance of the centrifugal pump 140 under different working conditions (changes of air pressure environment) can be simulated, which is beneficial to comprehensively analyzing the performance of the centrifugal pump 140. The air compressor 110 is connected to the pump inlet of the centrifugal pump 140, so that the centrifugal pump 140 generates a cavitation phenomenon, and the controller collects the vibration (bounce) of the vibration sensor 142 to judge the critical point of the cavitation occurrence, thereby determining the cavitation performance of the centrifugal pump 140. By adopting the form, the operation difficulty of the centrifugal pump 140 during testing can be reduced, and the automation degree of the testing is improved, so that the testing efficiency is improved.
As shown in fig. 1, a first electronic control valve 1316 is disposed between the liquid outlet 131 and the first pressure sensor 1312, a second electronic control valve 1326 is disposed between the second pressure sensor 1322 and the liquid inlet 132, and the first electronic control valve 1316 and the second electronic control valve 1326 are respectively electrically connected to the controller.
Specifically, a first electrically controlled valve 1316 is disposed between the liquid outlet 131 and the first pressure sensor 1312, and when the centrifugal pump 140 is subjected to a cavitation test, the opening of the first electrically controlled valve 1316 may be adjusted by the controller to adjust the pressure at the pump inlet of the centrifugal pump 140, so as to provide a test environment required by the cavitation test. Similarly, a second electrically controlled valve 1326 is disposed between the second pressure sensor 1322 and the fluid inlet 132, and the pressure at the pump outlet of the centrifugal pump 140 can be adjusted by adjusting the opening degree of the second electrically controlled valve 1326 through the controller, so as to provide a test environment required for the pump efficiency test.
As shown in fig. 2, the liquid outlet 131 is connected to the pump inlet through a first connecting passage 160, the pump outlet is connected to the liquid inlet 132 through a second connecting passage 170, a differential pressure sensor 162 is disposed between the first connecting passage 160 and the second connecting passage 170, and the differential pressure sensor 162 is electrically connected to the controller.
Specifically, the differential pressure sensor 162 is arranged between the first connecting channel 160 and the second connecting channel 170, so that the pressure difference between the pump inlet and the pump outlet can be directly obtained, the pressure difference can be directly adopted for calculation in the calculation of the lift of the centrifugal pump 140, the parameters adopted in the calculation can be reduced, and a plurality of feasible schemes are provided for the performance test of the centrifugal pump 140.
As shown in fig. 2 and 3, the first connection passage 160 is provided with a first on-off valve 164 and a first filter 166, the first on-off valve 164 and the first filter 166 are located between the liquid outlet 131 and the first electronic control valve 1316, the first connection passage 160 is also provided with an accumulator 168, and the accumulator 168 is located between the first electronic control valve 1316 and the pump inlet.
Specifically, by providing the first on-off valve 164 on the first connecting passage 160, and the first on-off valve 164 is located at the liquid outlet 131 of the liquid storage tank 130, when the centrifugal pump testing apparatus 100 is repaired and maintained, the first on-off valve 164 can be manually closed to prevent the liquid from leaking. In addition, through the first filter 166 disposed between the liquid outlet 131 and the first electrically controlled valve 1316, impurities in the liquid flowing through the centrifugal pump 140 can be filtered, which is beneficial to ensuring the purity of the liquid and avoiding the influence of the impurities in the liquid on the stability and accuracy of the centrifugal pump 140 during the test. Through the accumulator 168 arranged on the first connecting channel 160, the stability of the liquid pressure of the first connecting channel 160 is ensured, the pressure fluctuation is reduced, and the reliability and the stability of the test are improved.
As shown in fig. 3, the air compressor 110 is connected to the gas passage 112, the pump inlet is connected to the gas passage 112 through a first gas branch 114, the reservoir 130 is connected to the gas passage 112 through a second gas branch 116, the gas passage 112 is provided with a first control valve 1122, a regulating valve 1124 and a gas flow meter 1126, the first gas branch 114 is provided with a second control valve 1142, and the second gas branch 116 is provided with a third control valve 1162.
Specifically, the air pressure generated by the air compressor 110 is communicated and transmitted through the air passage 112, and the first control valve 1122 is disposed on the air passage 112 to control the on/off of the air passage 112, which is beneficial to control the air flowing through the first air branch 114 and the second air branch 116. By providing the adjusting valve 1124 on the gas passage 112, the pressure of the gas flowing through the gas passage 112 can be adjusted, which is advantageous for accurate control. By providing the second control valve 1142 in the first gas branch 114, the gas flow through the pump inlet can be controlled to determine the critical point at which cavitation in the centrifugal pump 140 occurs. By providing the third control valve 1162 on the second gas branch 116, the ambient pressure within the reservoir 130 can be adjusted to simulate different pressure conditions during use of the centrifugal pump 140.
As shown in fig. 4, the liquid storage tank 130 is further provided with a liquid replenishing port, the liquid replenishing port is communicated with a liquid replenishing channel 180, and the liquid replenishing channel 180 is provided with a second cut-off valve 182 and a second filter 184.
Specifically, when the liquid in the liquid storage tank 130 is too small, the liquid can be supplemented through the liquid supplementing channel 180 by providing the liquid supplementing port on the liquid storage tank 130. For example, when the liquid used in the test is tap water, the tap water pipe may be communicated with the fluid infusion port through the fluid infusion passage 180 to be replenished. By providing the second cut-off valve 182 on the fluid replenishing passage 180, the time and amount of replenishing can be controlled. Set up second filter 184 on through fluid infusion passageway 180, when carrying out the liquid replenishment, can play filterable effect, when preventing to mix impurity in the liquid, get into liquid storage pot 130 in, influence the stability of test.
As shown in fig. 4, the centrifugal pump testing apparatus 100 further includes a pressure relief channel 190 connected to the liquid storage tank 130, a safety valve 192 is disposed on the pressure relief channel 190, a pressure gauge 194 is disposed on the pressure relief channel 190, and the pressure gauge 194 is located between the safety valve 192 and the liquid storage tank 130.
Specifically, by providing the pressure relief passage 190 in the tank 130 and providing the safety valve 192 in the pressure relief passage 190, when the pressure in the tank 130 is too high, the pressure can be relieved through the safety valve 192. The pressure gauge 194 is arranged on the pressure relief access, so that the pressure in the liquid storage tank 130 can be known, the current pressure can be more intuitively known, and a proper treatment means can be conveniently carried out according to the pressure.
As shown in fig. 4, the centrifugal pump testing apparatus 100 further includes a vent passage 134 connected to the reservoir 130, the vent passage 134 being provided with a vent valve 1342.
Specifically, when the pressure in the reservoir 130 is required to be equal to the atmospheric pressure, the atmospheric pressure on the vent channel 134 can be directly opened to communicate the reservoir 130 with the atmospheric pressure. The pressure can be manually released when the safety valve 192 fails, so as to ensure the safety of the liquid storage tank 130 during use.
As shown in FIG. 4, a liquid level gauge 135 is provided on the liquid storage tank 130, and a liquid discharge valve 136 is provided at the bottom of the liquid storage tank 130. In this way, the level of the fluid in the reservoir 130 can be known to ensure proper operation during testing. In addition, the liquid can be discharged through the liquid discharge valve 136 when the liquid level is too high by the liquid discharge valve 136 provided at the bottom of the liquid storage tank 130, or the liquid can be discharged from the liquid storage tank 130 when the liquid in the liquid storage tank 130 is replaced.
In an alternative embodiment of the present application, the fluid reservoir 130 includes a plurality of fluid reservoirs 130 in communication with one another. Therefore, the storage amount of the liquid in the liquid storage tank 130 can be increased, and when the tested centrifugal pump 140 has larger power, the stability in testing can be improved.
As shown in fig. 5, the present embodiment further provides a centrifugal pump 140 testing method, which is applied to the centrifugal pump testing apparatus 100 in the foregoing embodiment, and the method includes:
s110, starting the air compressor 110 or the vacuum pump 120, and adjusting the air pressure in the liquid storage tank 130.
Specifically, when the air pressure in the liquid storage tank 130 is adjusted, the air pressure in the liquid storage tank 130 can be increased through the air compressor, and the liquid storage tank 130 can be in a negative pressure state through the vacuum pump 120, so that different use environments of the centrifugal pump 140 can be simulated, the test on the centrifugal pump 140 is more comprehensive, and the performance of the centrifugal pump 140 can be tested fully.
And S120, acquiring data information of the first pressure sensor 1312, the second pressure sensor 1322, the first liquid flow meter 1314, the second liquid flow meter 1324 and the torque and rotation speed sensor 152 under a preset air pressure environment.
Specifically, the preset air pressure environment is the air pressure environment created by the air compressor 110 or the vacuum pump 120, and the preset environment can be set into multiple groups according to the test requirements, so as to obtain the test parameters in different environments.
And S130, determining the relation between the flow of the centrifugal pump 140 and the lift, the shaft power and the pump efficiency according to the data information.
Specifically, the controller comprises a processor and a display screen connected with the processor, and when the controller collects the data, the data are processed, and a curve of quantity-lift, flow-axial power and flow-pump efficiency is drawn, so that a test result is more visual.
S140, starting the air compressor 110, and connecting the air compressor 110 with a pump inlet of the centrifugal pump 140.
Specifically, by connecting the air compressor 110 to the pump inlet of the centrifugal pump 140, the centrifugal pump 140 can draw in air to facilitate cavitation experiments on the centrifugal pump 140.
S150, the detection information of the vibration sensor 142 is acquired.
Specifically, the pump body or the input shaft vibration is determined by acquiring the detection information of the vibration sensor 142, so that the critical point when the cavitation phenomenon occurs is determined.
And S160, determining the cavitation performance of the centrifugal pump 140 according to the detection information.
Specifically, when the cavitation phenomenon occurs, the controller acquires data information of the first pressure sensor 1312, the second pressure sensor 1322, the first liquid flow meter 1314, the second liquid flow meter 1324 and the torque and rotation speed sensor 152 to determine the influence of the cavitation phenomenon on the centrifugal pump 140.
The centrifugal pump 140 testing method provided by the embodiment of the application relies on the centrifugal pump testing equipment 100, automatic testing can be realized through the controller in the testing process, multiple groups of tests can be completed by the same equipment, the operation difficulty in the centrifugal pump 140 testing process can be reduced, the automation degree of the testing is improved, and therefore the testing efficiency is improved.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a centrifugal pump test equipment, its characterized in that, includes air compressor, vacuum pump and liquid storage pot, and sets up liquid outlet and income liquid mouth on the liquid storage pot, the liquid outlet be used for with the pump entry linkage of centrifugal pump, go into the liquid mouth be used for with the pump exit linkage of centrifugal pump, the liquid outlet with be provided with first pressure sensor and first fluidflowmeter between the pump entry, the pump export with go into and be provided with second pressure sensor and second fluidflowmeter between the liquid mouth, air compressor respectively with the liquid storage pot with the pump entry linkage of centrifugal pump, the vacuum pump with the liquid storage pot is connected, centrifugal pump test equipment still includes the motor, and with centrifugal pump complex vibration sensor, the motor pass through torque speed sensor with the centrifugal pump transmission is connected, wherein, the air compressor, the vacuum pump, the first pressure sensor, the second pressure sensor, the first liquid flow meter, the second liquid flow meter, the motor, the vibration sensor and the torque and rotation speed sensor are respectively electrically connected with a controller.
2. The centrifugal pump test equipment of claim 1, wherein a first electrically controlled valve is disposed between the liquid outlet and the first pressure sensor, a second electrically controlled valve is disposed between the second pressure sensor and the liquid inlet, and the first electrically controlled valve and the second electrically controlled valve are electrically connected to the controller, respectively.
3. The centrifugal pump testing apparatus of claim 2, wherein the liquid outlet is connected to the pump inlet via a first connecting channel, the pump outlet is connected to the liquid inlet via a second connecting channel, a differential pressure sensor is disposed between the first connecting channel and the second connecting channel, and the differential pressure sensor is electrically connected to the controller.
4. A centrifugal pump testing apparatus according to claim 3, wherein a first on-off valve and a first filter are provided on said first connection passage, said first on-off valve and said first filter being located between said liquid outlet and said first electrically controlled valve, said first connection passage further being provided with an accumulator, said accumulator being located between said first electrically controlled valve and said pump inlet.
5. Centrifugal pump test equipment according to claim 1, wherein the air compressor is connected to a gas passage, the pump inlet is connected to the gas passage through a first gas branch, the reservoir is connected to the gas passage through a second gas branch, a first control valve, a regulating valve and a gas flow meter are arranged on the gas passage, a second control valve is arranged on the first gas branch, and a third control valve is arranged on the second gas branch.
6. The centrifugal pump testing device of any one of claims 1 to 5, wherein a fluid infusion port is further arranged on the fluid reservoir, the fluid infusion port is communicated with a fluid infusion channel, and a second on-off valve and a second filter are arranged on the fluid infusion channel.
7. The centrifugal pump testing apparatus of any one of claims 1 to 5, further comprising a pressure relief channel connected to the reservoir, wherein a safety valve is disposed on the pressure relief channel, and a pressure gauge is disposed on the pressure relief channel and located between the safety valve and the reservoir.
8. The centrifugal pump testing apparatus of any one of claims 1 to 5, further comprising an exhaust channel connected to the reservoir, the exhaust channel having an exhaust valve disposed thereon.
9. The centrifugal pump testing apparatus of any one of claims 1 to 5, wherein a liquid level gauge is provided on the liquid storage tank, and a drain valve is provided at the bottom of the liquid storage tank.
10. Centrifugal pump testing apparatus according to any one of claims 1 to 5, wherein the reservoir comprises a plurality of reservoirs, the plurality of reservoirs being in communication with one another.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120371922.9U CN214096576U (en) | 2021-02-09 | 2021-02-09 | Centrifugal pump test equipment |
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