CN109162910A - A kind of test device and test method of Cargo Oil Pump performance - Google Patents
A kind of test device and test method of Cargo Oil Pump performance Download PDFInfo
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- CN109162910A CN109162910A CN201810697823.2A CN201810697823A CN109162910A CN 109162910 A CN109162910 A CN 109162910A CN 201810697823 A CN201810697823 A CN 201810697823A CN 109162910 A CN109162910 A CN 109162910A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B51/00—Testing machines, pumps, or pumping installations
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
The invention discloses the test devices and test method of a kind of Cargo Oil Pump performance, belong to Cargo Oil Pump field.The test device includes flow module, cavitation erosion module, modular pressure, torquemeter and calculation control module, flow module includes steady-flow tank, flow control valve and flowmeter, first water inlet of steady-flow tank is connected to the water outlet of flow control valve, the water inlet of flow control valve is used to be connected to the water outlet of Cargo Oil Pump to be measured, and flowmeter is arranged on the pipeline between flow control valve and Cargo Oil Pump to be measured；Cavitation erosion module includes that cavitation erosion tank and vacuum pump, the water outlet for the tank that cavitates are connected to the water inlet of Cargo Oil Pump to be measured, and the first water inlet of the tank that cavitates is connected to the water outlet of steady-flow tank, and the air inlet of vacuum pump is connected to the vacuum interface of steady-flow tank and the tank that cavitates respectively；Modular pressure includes import pressure-measuring pipe and outlet pressure-measuring pipe；Torquemeter is connect with the shaft of Cargo Oil Pump to be measured.The present invention can detecte the working performance of Cargo Oil Pump.
Description
Technical field
The invention belongs to Cargo Oil Pump field, in particular to a kind of the test device and test method of Cargo Oil Pump performance.
Background technique
Cargo Oil Pump is oil carrier, chemical tanker or FPSO (Floating Production Storage and
Offloading, floating type production, storage and offloading device) upper liquid goods handling system core equipment, major function be pump Cargo Oil
Or oil is refuted between cargo tank.
In order to guarantee that Cargo Oil Pump can have in actual work good working performance, so needing to carry out Cargo Oil Pump
Test.However, the working performance due to Cargo Oil Pump is related to multiple parameters, such as lift, efficiency and available NPSH, so
Repeatedly measurement respectively is generally required now, and process is extremely complex, and efficiency is lower.
Summary of the invention
The embodiment of the invention provides the test devices and test method of a kind of Cargo Oil Pump performance, can detecte Cargo Oil Pump
Working performance.The technical solution is as follows:
On the one hand, the embodiment of the invention provides a kind of test device of Cargo Oil Pump performance, the test device includes stream
Module, cavitation erosion module, modular pressure, torquemeter and calculation control module are measured,
The flow module includes steady-flow tank, flow control valve and flowmeter, the first water inlet of the steady-flow tank and institute
The water outlet connection of flow control valve is stated, the water inlet of the flow control valve is used to be connected to the water outlet of Cargo Oil Pump to be measured, institute
It states on the pipeline that flowmeter is arranged between the flow control valve and the Cargo Oil Pump to be measured；
The cavitation erosion module includes cavitation erosion tank and vacuum pump, the water outlet of the cavitation erosion tank and the Cargo Oil Pump to be measured into
First water inlet of mouth of a river connection, the cavitation erosion tank is connected to the water outlet of the steady-flow tank, the air inlet point of the vacuum pump
It is not connected to the vacuum interface of the steady-flow tank and the cavitation erosion tank；
The modular pressure includes import pressure-measuring pipe and outlet pressure-measuring pipe, and the import pressure-measuring pipe is arranged in the goods to be measured
The water outlet of the Cargo Oil Pump to be measured is arranged in the water inlet of oil pump, the outlet pressure-measuring pipe；
The torquemeter is connect with the shaft of the Cargo Oil Pump to be measured；
The calculation control module respectively with the flowmeter, the import pressure-measuring pipe, the outlet pressure-measuring pipe and described
Torquemeter electrical connection, the calculation control module are used for according to the flowmeter, the import pressure-measuring pipe, the outlet pressure-measuring pipe
The performance chart of the Cargo Oil Pump to be measured is calculated in the data measured with the torquemeter.
In a kind of implementation of the invention, the flow module further includes the first shut-off valve, first shut-off valve
First water inlet of the steady-flow tank is set.
In another implementation of the invention, the cavitation erosion module further includes the second shut-off valve, second cut-off
The water outlet of the cavitation erosion tank is arranged in valve.
In another implementation of the invention, the cavitation erosion module further includes vacuum valve, and the vacuum valve setting exists
The air inlet of the vacuum pump.
In another implementation of the invention, the test device further includes third shut-off valve, the third cut-off
The Single port of valve is connected to the second water inlet of the second water inlet of the steady-flow tank and the cavitation erosion tank respectively.
On the other hand, the embodiment of the invention provides a kind of test method of Cargo Oil Pump performance, the test method is applicable in
In above-mentioned test device, the test method includes:
Obtain the difference in height, described to be measured of the water inlet of the relatively described Cargo Oil Pump to be measured of water outlet of the Cargo Oil Pump to be measured
The water outlet pressure of Cargo Oil Pump, the water inlet pressure of the Cargo Oil Pump to be measured, the Cargo Oil Pump to be measured water outlet flow, described
The water outlet sectional area of the water inlet sectional area of Cargo Oil Pump to be measured and the Cargo Oil Pump to be measured；
Water outlet according to the water outlet of the Cargo Oil Pump to be measured with respect to the difference in height, the Cargo Oil Pump to be measured of lift datum level
Mouthful pressure, the water inlet pressure of the Cargo Oil Pump to be measured, the water outlet flow of the Cargo Oil Pump to be measured, the Cargo Oil Pump to be measured
The lift of the Cargo Oil Pump to be measured is calculated in the water outlet sectional area of water inlet sectional area and the Cargo Oil Pump to be measured；
The water outlet flow for adjusting the Cargo Oil Pump to be measured, obtains flow lift curve graph；
Obtain the torque of the revolving speed and the Cargo Oil Pump to be measured of the Cargo Oil Pump to be measured；
According to the lift of the water outlet flow of the Cargo Oil Pump to be measured and the Cargo Oil Pump to be measured, it is calculated described to be measured
The output power of Cargo Oil Pump is calculated described according to the torque of the revolving speed of the Cargo Oil Pump to be measured and the Cargo Oil Pump to be measured
The shaft power of Cargo Oil Pump to be measured；
It is calculated according to the shaft power of the output power of the Cargo Oil Pump to be measured and the Cargo Oil Pump to be measured described to be measured
The efficiency of Cargo Oil Pump；
The water outlet flow for adjusting the Cargo Oil Pump to be measured, obtains Flux efficiency curve graph；
Obtain difference in height of the water inlet with respect to net positive suction head datum level of the Cargo Oil Pump to be measured；
According to the water inlet of the Cargo Oil Pump to be measured with respect to the difference in height of net positive suction head datum level, the Cargo Oil Pump to be measured
The available NPSH of the Cargo Oil Pump to be measured is calculated in water outlet pressure；
The water outlet pressure for adjusting the Cargo Oil Pump to be measured, obtains net positive suction head curve graph；
According to the flow lift curve graph, the Flux efficiency curve graph and the net positive suction head curve graph, institute is obtained
State the performance test results of Cargo Oil Pump to be measured.
Further, the test method includes: that the lift of the Cargo Oil Pump to be measured is calculated by the following formula to obtain:
Wherein, H is the lift of the Cargo Oil Pump to be measured, ZdFor the water outlet height of the Cargo Oil Pump to be measured, ZsFor it is described to
Survey the water inlet open height of Cargo Oil Pump, PdFor the water outlet pressure of the Cargo Oil Pump to be measured, PsFor the water inlet of the Cargo Oil Pump to be measured
Pressure, Q are the water outlet flow of the Cargo Oil Pump to be measured, SdFor the water outlet sectional area of the Cargo Oil Pump to be measured, SsFor it is described to
The water inlet sectional area of Cargo Oil Pump is surveyed, ρ is the density of liquid in the Cargo Oil Pump to be measured, and g is acceleration of gravity.
Further, the test method includes: that the efficiency of the Cargo Oil Pump to be measured is calculated by the following formula to obtain:
Wherein, P1For the output power of the Cargo Oil Pump to be measured, P2For the shaft power of the Cargo Oil Pump to be measured, n be it is described to
The revolving speed of Cargo Oil Pump is surveyed, T is the torque of the Cargo Oil Pump to be measured, and η is the efficiency of the Cargo Oil Pump to be measured.
Further, the test method includes: that the available NPSH of the Cargo Oil Pump to be measured passes through following formula meter
It obtains:
Wherein, NPSHaFor the available NPSH of the Cargo Oil Pump to be measured, PaFor atmospheric pressure, PvFor the liquid gasification
The pressure of Shi Suoxu, ZdFor the difference in height of the opposite net positive suction head datum level of water inlet of the Cargo Oil Pump to be measured.
Further, the water outlet pressure for adjusting the Cargo Oil Pump to be measured, comprising:
The 120% Cargo Oil Pump metered flow to be measured is gradually increased to by the 0% Cargo Oil Pump metered flow to be measured.
Technical solution provided in an embodiment of the present invention has the benefit that
In the working performance of provided test device test Cargo Oil Pump through the embodiment of the present invention, first by goods to be measured
Oil pump is installed in place with test device.Then cavitation erosion tank is connected to the water inlet of Cargo Oil Pump to be measured, steady-flow tank and Cargo Oil to be measured
The water outlet of pump is connected to, so that forming the circuit of circulation between cavitation erosion tank, Cargo Oil Pump to be measured and steady-flow tank.Then goods to be measured is started
Oil pump, and the water outlet flow of Cargo Oil Pump to be measured is adjusted by flow control valve, Cargo Oil Pump to be measured is measured by flow measurement
The real-time change of rate of discharge goes out so as to measure the outlet pressure of Cargo Oil Pump to be measured by exporting pressure-measuring pipe in different
Corresponding parameter, measures the inlet pressure of Cargo Oil Pump to be measured in different rates of discharge by import pressure-measuring pipe under mouth flow
Lower corresponding parameter.By the above parameter, can calculate Cargo Oil Pump to be measured under different rates of discharge corresponding lift with
And corresponding efficiency to get arrive flow-lift curve figure and flow-efficiency curve diagram.In addition, adjusting goods to be measured by vacuum pump
The inlet pressure of oil pump, so as to calculate Cargo Oil Pump to be measured corresponding available NPSH under different inlet pressures,
Net positive suction head curve graph is obtained, and then passes through flow-lift curve figure, flow-efficiency curve diagram and net positive suction head curve graph,
Obtain the working performance of Cargo Oil Pump to be measured.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is the structural schematic diagram of the test device of Cargo Oil Pump performance provided in an embodiment of the present invention；
Fig. 2 is the flow chart of test method provided in an embodiment of the present invention
Fig. 3 is Cargo Oil Pump performance test curve graph provided in an embodiment of the present invention；
Fig. 4 is Cargo Oil Pump net positive suction head curve graph provided in an embodiment of the present invention；
Each symbol indicates that meaning is as follows in figure:
1- flow module, 11- steady-flow tank, 12- flow control valve, 13- flowmeter, the first shut-off valve of 14-, 2- cavitation erosion mould
Block, 21- cavitation erosion tank, 22- vacuum pump, the second shut-off valve of 23-, 24- vacuum valve, 3- modular pressure, 31- import pressure-measuring pipe, 32- go out
Mouth pressure-measuring pipe, 4- torquemeter, 5- calculation control module, 6- third shut-off valve, 100- Cargo Oil Pump to be measured.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to embodiment party of the present invention
Formula is described in further detail.
The embodiment of the invention provides a kind of test devices of Cargo Oil Pump performance, as shown in Figure 1, test device includes flow
Module 1, cavitation erosion module 2, modular pressure 3, torquemeter 4 and calculation control module 5.
Flow module 1 includes steady-flow tank 11, flow control valve 12 and flowmeter 13, the first water inlet and stream of steady-flow tank 11
The water outlet of adjustable valve 12 is connected to, and the water inlet of flow control valve 12 is used to be connected to the water outlet of Cargo Oil Pump 100 to be measured, flow
Meter 13 is arranged on the pipeline between flow control valve 12 and Cargo Oil Pump to be measured 100.
The module 2 that cavitates includes cavitation erosion tank 21 and vacuum pump 22, the water inlet of the water outlet and Cargo Oil Pump 100 to be measured of the tank 21 that cavitates
Mouthful connection, cavitation erosion tank 21 the first water inlet be connected to the water outlet of steady-flow tank 11, the air inlet of vacuum pump 22 respectively with current stabilization
Tank 11 is connected to the vacuum interface of cavitation erosion tank 21.
Modular pressure 3 includes import pressure-measuring pipe 31 and outlet pressure-measuring pipe 32, and import pressure-measuring pipe 31 is arranged in Cargo Oil Pump to be measured
The water outlet of Cargo Oil Pump 100 to be measured is arranged in 100 water inlet, outlet pressure-measuring pipe 32.
Torquemeter 4 is connect with the shaft of Cargo Oil Pump 100 to be measured.
Calculation control module 5 is electrically connected with flowmeter 13, import pressure-measuring pipe 31, outlet pressure-measuring pipe 32 and torquemeter 4 respectively,
Calculation control module 5 is used for the data measured according to flowmeter 13, import pressure-measuring pipe 31, outlet pressure-measuring pipe 32 and torquemeter 4,
The performance chart of Cargo Oil Pump 100 to be measured is calculated.
In the working performance of provided test device test Cargo Oil Pump through the embodiment of the present invention, first by goods to be measured
Oil pump is installed in place with test device.Then cavitation erosion tank is connected to the water inlet of Cargo Oil Pump to be measured, steady-flow tank and Cargo Oil to be measured
The water outlet of pump is connected to, so that forming the circuit of circulation between cavitation erosion tank, Cargo Oil Pump to be measured and steady-flow tank.Then goods to be measured is started
Oil pump, and the water outlet flow of Cargo Oil Pump to be measured is adjusted by flow control valve, Cargo Oil Pump to be measured is measured by flow measurement
The real-time change of rate of discharge goes out so as to measure the outlet pressure of Cargo Oil Pump to be measured by exporting pressure-measuring pipe in different
Corresponding parameter, measures the inlet pressure of Cargo Oil Pump to be measured in different rates of discharge by import pressure-measuring pipe under mouth flow
Lower corresponding parameter.By the above parameter, can calculate Cargo Oil Pump to be measured under different rates of discharge corresponding lift with
And corresponding efficiency to get arrive flow-lift curve figure and flow-efficiency curve diagram.In addition, adjusting goods to be measured by vacuum pump
The inlet pressure of oil pump, so as to calculate Cargo Oil Pump to be measured corresponding available NPSH under different inlet pressures,
Net positive suction head curve graph is obtained, and then passes through flow-lift curve figure, flow-efficiency curve diagram and net positive suction head curve graph,
Obtain the working performance of Cargo Oil Pump to be measured.
In above-mentioned implementation, performance chart may include flow-lift curve figure, flow-efficiency curve diagram and
Net positive suction head curve graph.In other examples, performance chart can also include other curve graphs, such as flow-shaft work
Rate curve graph etc., the invention is not limited in this regard.
In the present embodiment, calculation control module 5 can be for PLC (Programmable Logic
Controller, programmable logic controller (PLC)) control device.
In the present embodiment, flow module 1 further includes the first shut-off valve 14, and steady-flow tank 11 is arranged in the first shut-off valve 14
First water inlet.
In above-mentioned implementation, the first shut-off valve 14 is used to avoid in steady-flow tank when steady-flow tank 11 is cleaned in maintenance
Liquid outflow.
Optionally, the first shut-off valve 14 can be solenoid valve, and the first shut-off valve 14 is electrically connected with calculation control module 5, from
And first shut-off valve 14 can be remotely operated by calculation control module 5.In other embodiments, the first shut-off valve 14
It may be hand stop valve, locally controlled by operator, to guarantee the reliability of the first shut-off valve 14.
In the present embodiment, cavitation erosion module 2 further includes the second shut-off valve 23, and cavitation erosion tank 21 is arranged in the second shut-off valve 23
Water outlet.
In above-mentioned implementation, the second shut-off valve 23 is used to avoid in cavitation erosion tank 21 when cavitation erosion tank 21 is cleaned in maintenance
Liquid outflow.
Optionally, the second shut-off valve 23 can be solenoid valve, and the second shut-off valve 23 is electrically connected with calculation control module 5, from
And second shut-off valve 23 can be remotely operated by calculation control module 5.In other embodiments, the second shut-off valve 23
It may be hand stop valve, locally controlled by operator, to guarantee the reliability of the second shut-off valve 23.
In the present embodiment, cavitation erosion module 2 further includes vacuum valve 24, and the air inlet of vacuum pump 22 is arranged in vacuum valve 24.
In above-mentioned implementation, vacuum valve 24 can play on-off vacuum pump 22 and cavitation erosion tank 21 and vacuum pump 22 with
The effect of steady-flow tank 11.
Optionally, it when adjusting the inlet pressure of Cargo Oil Pump to be measured by vacuum valve 24 and vacuum pump 22, first turns on true
Sky pump 22, is then then turned on vacuum valve 24, vacuum pump 22 is enabled to adjust the inlet pressure of Cargo Oil Pump to be measured；It is needing to stop
When pressure is adjusted, vacuum valve 24 is first closed, vacuum pump 22 is turned off.
Optionally, test device further includes third shut-off valve 6, the Single port of third shut-off valve 6 respectively with steady-flow tank 11
Second water inlet is connected to the second water inlet of cavitation erosion tank 21.
In above-mentioned implementation, the other end of third shut-off valve 6 is connected to water source, can be by opening and closing third shut-off valve
6 with realize steady-flow tank 11 and cavitate tank 21 moisturizing.
Optionally, water source can be pumping plant etc..Third shut-off valve 6 can be solenoid valve, and third shut-off valve 6 and calculating control
Module 5 is electrically connected, so as to be remotely operated by calculation control module 5 to third shut-off valve 6.In other embodiments
In, third shut-off valve 6 or hand stop valve are locally controlled by operator, to guarantee the reliable of third shut-off valve 6
Property.
The embodiment of the invention provides a kind of test method of Cargo Oil Pump performance, this method is suitable for surveying shown in Fig. 1
Trial assembly is set, and Fig. 2 is the flow chart of the test method, which includes:
Step 101: obtaining the difference in height of the water inlet of the water outlet Cargo Oil Pump relatively to be measured of Cargo Oil Pump to be measured, Cargo Oil to be measured
The water outlet pressure of pump, the water inlet pressure of Cargo Oil Pump to be measured, Cargo Oil Pump to be measured water outlet flow, Cargo Oil Pump to be measured water inlet
The water outlet sectional area of mouth sectional area and Cargo Oil Pump to be measured.
When specific implementation, the difference in height of the water inlet of the water outlet of Cargo Oil Pump to be measured Cargo Oil Pump relatively to be measured can pass through reality
Border measurement obtains, and the water outlet pressure of Cargo Oil Pump to be measured can be obtained by exporting pressure-measuring pipe measurement, the water inlet of Cargo Oil Pump to be measured
Mouth pressure can be obtained by import pressure-measuring pipe measurement, and the water outlet flow of Cargo Oil Pump to be measured can be measured by flow measurement
It arrives, the water inlet sectional area of Cargo Oil Pump to be measured and the water outlet sectional area of Cargo Oil Pump to be measured can be obtained by actual measurement.
Step 102: the water outlet according to the water outlet of Cargo Oil Pump to be measured with respect to the difference in height, Cargo Oil Pump to be measured of lift datum level
Mouthful pressure, the water inlet pressure of Cargo Oil Pump to be measured, the water outlet flow of Cargo Oil Pump to be measured, Cargo Oil Pump to be measured water inlet sectional area
With the water outlet sectional area of Cargo Oil Pump to be measured, the lift of Cargo Oil Pump to be measured is calculated.
Specifically, the lift of Cargo Oil Pump to be measured is calculated by the following formula to obtain:
In formula (1), H is the lift of Cargo Oil Pump to be measured, ZdFor the water outlet height of Cargo Oil Pump to be measured, ZsFor goods to be measured
The water inlet open height of oil pump, PdFor the water outlet pressure of Cargo Oil Pump to be measured, PsFor the water inlet pressure of Cargo Oil Pump to be measured, Q is to be measured
The water outlet flow of Cargo Oil Pump, SdFor the water outlet sectional area of Cargo Oil Pump to be measured, SsFor the water inlet sectional area of Cargo Oil Pump to be measured, ρ
For the density of liquid in Cargo Oil Pump to be measured, g is acceleration of gravity.
In above-mentioned implementation, test device obtains above-mentioned all data, is then utilized by calculation control module upper
State the lift that Cargo Oil Pump to be measured is calculated in formula (1).
Step 103: adjusting the water outlet flow of Cargo Oil Pump to be measured, obtain flow lift curve graph (referring to Fig. 3).
When specific implementation, the 120% specified stream of Cargo Oil Pump to be measured is gradually increased to by 0% Cargo Oil Pump metered flow to be measured
Amount, is that initial value unique step takes 13 measurement points from the metered flow that the water outlet flow of Cargo Oil Pump to be measured is 0%, such as to be measured
It is first measurement point when the metered flow that the water outlet flow of Cargo Oil Pump is 0%, the water outlet flow of Cargo Oil Pump to be measured is
It is second measurement point ... ..., the metered flow that the water outlet flow of Cargo Oil Pump to be measured is 120% when 10% metered flow
When, it is the 13rd measurement point.The corresponding lift of each measurement point is calculated by formula (1), to obtain flow lift curve graph.
Step 104: obtaining the torque of the revolving speed and Cargo Oil Pump to be measured of Cargo Oil Pump to be measured.
When specific implementation, the torque of the revolving speed of Cargo Oil Pump to be measured and Cargo Oil Pump to be measured can be measured by torquemeter
It arrives.
Step 105: according to the lift of the water outlet flow of Cargo Oil Pump to be measured and Cargo Oil Pump to be measured, Cargo Oil to be measured is calculated
The shaft work of Cargo Oil Pump to be measured is calculated according to the torque of the revolving speed of Cargo Oil Pump to be measured and Cargo Oil Pump to be measured in the output power of pump
Rate.
Specifically, the shaft power of the output power of Cargo Oil Pump to be measured and Cargo Oil Pump to be measured is calculated by the following formula to obtain:
In formula (2) and (3), P1For the output power of Cargo Oil Pump to be measured, P2For the shaft power of Cargo Oil Pump to be measured, n be to
The revolving speed of Cargo Oil Pump is surveyed, T is the torque of Cargo Oil Pump to be measured, and η is the efficiency of Cargo Oil Pump to be measured.
In above-mentioned implementation, test device obtains above-mentioned all data, is then utilized by calculation control module upper
It states formula (2) and (3) calculates separately to obtain the shaft power of the output power of Cargo Oil Pump to be measured and Cargo Oil Pump to be measured.
Step 106: Cargo Oil to be measured is calculated according to the shaft power of the output power of Cargo Oil Pump to be measured and Cargo Oil Pump to be measured
The efficiency of pump.
Specifically, the efficiency of Cargo Oil Pump to be measured is calculated by the following formula to obtain:
In formula (4), η is the efficiency of Cargo Oil Pump to be measured.
In above-mentioned implementation, test device obtains above-mentioned all data, is then utilized by calculation control module upper
State the efficiency that Cargo Oil Pump to be measured is calculated in formula (4).
Step 107: adjusting the water outlet flow of Cargo Oil Pump to be measured, obtain Flux efficiency curve graph (referring to Fig. 3).
In above-mentioned implementation, the regulative mode of the water outlet flow of Cargo Oil Pump to be measured and the selection of measurement point are equal
Identical as step 103, therefore not to repeat here.
Step 108: obtaining difference in height of the water inlet with respect to net positive suction head datum level of Cargo Oil Pump to be measured.
In above-mentioned implementation, net positive suction head datum level is the impeller center face of Cargo Oil Pump to be measured, Cargo Oil Pump to be measured
Water inlet can be obtained with respect to the difference in height of net positive suction head datum level by actual measurement
Step 109: according to the water inlet of Cargo Oil Pump to be measured with respect to the difference in height of net positive suction head datum level, Cargo Oil Pump to be measured
The available NPSH of Cargo Oil Pump to be measured is calculated in water outlet pressure.
Specifically, the available NPSH of Cargo Oil Pump to be measured is calculated by the following formula to obtain:
In formula (5), NPSHaFor the available NPSH of Cargo Oil Pump to be measured, PaFor atmospheric pressure, PvFor liquid gasification
The pressure of Shi Suoxu, ZdFor the difference in height of the opposite net positive suction head datum level of water inlet of Cargo Oil Pump to be measured.
Step 110: adjusting the water outlet pressure of Cargo Oil Pump to be measured, obtain net positive suction head curve graph (referring to fig. 4).
In above-mentioned implementation, Cargo Oil Pump to be measured is started first, by flow control valve by the water outlet of Cargo Oil Pump to be measured
Mouth pressure is adjusted to metered flow, is then turned on vacuum valve and vacuum pump, gradually decreases the water inlet pressure of Cargo Oil Pump to be measured,
The available NPSH of Cargo Oil Pump to be measured is calculated during secondary by formula (5), until the lift of Cargo Oil Pump to be measured is initially being raised
3% is reduced on the basis of journey, closes vacuum valve, and stop the work of vacuum pump.
Step 111: according to flow lift curve graph, Flux efficiency curve graph and net positive suction head curve graph, obtaining goods to be measured
The performance test results of oil pump.
It should be noted that Fig. 3 is Cargo Oil Pump performance test curve graph, imitated including flow lift curve graph, flow
Rate curve graph and flow axis power graph.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of test device of Cargo Oil Pump performance, which is characterized in that the test device include flow module, cavitation erosion module,
Modular pressure, torquemeter and calculation control module,
The flow module includes steady-flow tank, flow control valve and flowmeter, the first water inlet and the stream of the steady-flow tank
The water outlet of adjustable valve is connected to, and the water inlet of the flow control valve is used to be connected to the water outlet of Cargo Oil Pump to be measured, the stream
Meter is arranged on the pipeline between the flow control valve and the Cargo Oil Pump to be measured；
The cavitation erosion module includes cavitation erosion tank and vacuum pump, the water inlet of the water outlet and the Cargo Oil Pump to be measured of the cavitation erosion tank
Connection, it is described cavitation erosion tank the first water inlet be connected to the water outlet of the steady-flow tank, the air inlet of the vacuum pump respectively with
The steady-flow tank is connected to the vacuum interface of the cavitation erosion tank；
The modular pressure includes import pressure-measuring pipe and outlet pressure-measuring pipe, and the import pressure-measuring pipe is arranged in the Cargo Oil Pump to be measured
Water inlet, the water outlet of the Cargo Oil Pump to be measured is arranged in the outlet pressure-measuring pipe；
The torquemeter is connect with the shaft of the Cargo Oil Pump to be measured；
The calculation control module respectively with the flowmeter, the import pressure-measuring pipe, the outlet pressure-measuring pipe and the torque
Instrument electrical connection, the calculation control module are used for according to the flowmeter, the import pressure-measuring pipe, the outlet pressure-measuring pipe and institute
The data that torquemeter measures are stated, the performance chart of the Cargo Oil Pump to be measured is calculated.
2. test device according to claim 1, which is characterized in that the flow module further includes the first shut-off valve, institute
State the first water inlet that the steady-flow tank is arranged in the first shut-off valve.
3. test device according to claim 1, which is characterized in that the cavitation erosion module further includes the second shut-off valve, institute
State the water outlet that the cavitation erosion tank is arranged in the second shut-off valve.
4. test device according to claim 1, which is characterized in that the cavitation erosion module further includes vacuum valve, described true
The air inlet of the vacuum pump is arranged in empty valve.
5. test device according to claim 1, which is characterized in that the test device further includes third shut-off valve, institute
The Single port for stating third shut-off valve is connected to the second water inlet of the second water inlet of the steady-flow tank and the cavitation erosion tank respectively.
6. a kind of test method of Cargo Oil Pump performance, which is characterized in that the test method is suitable for survey described in claim 1
Trial assembly is set, and the test method includes:
Obtain the difference in height of the water inlet of the relatively described Cargo Oil Pump to be measured of water outlet of the Cargo Oil Pump to be measured, the Cargo Oil to be measured
The water outlet pressure of pump, the water inlet pressure of the Cargo Oil Pump to be measured, the Cargo Oil Pump to be measured water outlet flow, described to be measured
The water outlet sectional area of the water inlet sectional area of Cargo Oil Pump and the Cargo Oil Pump to be measured；
Difference in height, the water outlet pressure of the Cargo Oil Pump to be measured according to the water outlet of the Cargo Oil Pump to be measured with respect to lift datum level
Power, the water inlet pressure of the Cargo Oil Pump to be measured, the Cargo Oil Pump to be measured water outlet flow, the Cargo Oil Pump to be measured water inlet
The water outlet sectional area of mouth sectional area and the Cargo Oil Pump to be measured, is calculated the lift of the Cargo Oil Pump to be measured；
The water outlet flow for adjusting the Cargo Oil Pump to be measured, obtains flow lift curve graph；
Obtain the torque of the revolving speed and the Cargo Oil Pump to be measured of the Cargo Oil Pump to be measured；
According to the lift of the water outlet flow of the Cargo Oil Pump to be measured and the Cargo Oil Pump to be measured, the Cargo Oil to be measured is calculated
The output power of pump is calculated described to be measured according to the torque of the revolving speed of the Cargo Oil Pump to be measured and the Cargo Oil Pump to be measured
The shaft power of Cargo Oil Pump；
The Cargo Oil to be measured is calculated according to the shaft power of the output power of the Cargo Oil Pump to be measured and the Cargo Oil Pump to be measured
The efficiency of pump；
The water outlet flow for adjusting the Cargo Oil Pump to be measured, obtains Flux efficiency curve graph；
Obtain difference in height of the water inlet with respect to net positive suction head datum level of the Cargo Oil Pump to be measured；
Water outlet according to the water inlet of the Cargo Oil Pump to be measured with respect to the difference in height, the Cargo Oil Pump to be measured of net positive suction head datum level
Mouth pressure, is calculated the available NPSH of the Cargo Oil Pump to be measured；
The water inlet pressure for adjusting the Cargo Oil Pump to be measured, obtains net positive suction head curve graph；
According to the flow lift curve graph, the Flux efficiency curve graph and the net positive suction head curve graph, obtain it is described to
Survey the performance test results of Cargo Oil Pump.
7. test method according to claim 6, which is characterized in that the test method includes: the Cargo Oil Pump to be measured
Lift be calculated by the following formula to obtain:
Wherein, H is the lift of the Cargo Oil Pump to be measured, ZdFor the water outlet height of the Cargo Oil Pump to be measured, ZsFor the goods to be measured
The water inlet open height of oil pump, PdFor the water outlet pressure of the Cargo Oil Pump to be measured, PsFor the water inlet pressure of the Cargo Oil Pump to be measured
Power, Q are the water outlet flow of the Cargo Oil Pump to be measured, SdFor the water outlet sectional area of the Cargo Oil Pump to be measured, SsIt is described to be measured
The water inlet sectional area of Cargo Oil Pump, ρ are the density of liquid in the Cargo Oil Pump to be measured, and g is acceleration of gravity.
8. test method according to claim 7, which is characterized in that the test method includes: the Cargo Oil Pump to be measured
Efficiency be calculated by the following formula to obtain:
Wherein, P1For the output power of the Cargo Oil Pump to be measured, P2For the shaft power of the Cargo Oil Pump to be measured, n is the goods to be measured
The revolving speed of oil pump, T are the torque of the Cargo Oil Pump to be measured, and η is the efficiency of the Cargo Oil Pump to be measured.
9. test method according to claim 8, which is characterized in that the test method includes: the Cargo Oil Pump to be measured
Available NPSH be calculated by the following formula to obtain:
Wherein, NPSHaFor the available NPSH of the Cargo Oil Pump to be measured, PaFor atmospheric pressure, PvFor liquid gasification when institute
The pressure needed, ZdFor the difference in height of the opposite net positive suction head datum level of water inlet of the Cargo Oil Pump to be measured.
10. test method according to claim 8, which is characterized in that the water outlet for adjusting the Cargo Oil Pump to be measured
Pressure, comprising:
The 120% Cargo Oil Pump metered flow to be measured is gradually increased to by the 0% Cargo Oil Pump metered flow to be measured.
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