Pump performance test system
By designing a pump performance testing system, and utilizing components such as a liquid storage device, a solid phase supply component, and a control valve, the problem of uneven mixing of solid and liquid two-phase media was solved, achieving high-precision testing of the pump and enabling accurate evaluation of the pump's transport characteristics.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CHINA STATE SHIPBUILDING CORP LTD RESEARCH INSTITUTE 719
- Filing Date
- 2025-05-26
- Publication Date
- 2026-07-07
Smart Images
Figure CN120626469B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of pump technology, and in particular to a pump performance testing system. Background Technology
[0002] Pumps are common devices in pipeline systems, used to drive the flow of fluids within pipelines. In certain situations, pumps need to transport liquids containing a certain amount of solid particles (i.e., solid-liquid two-phase media). In such cases, it is necessary to test parameters such as the pump's head, power consumption, and motor current under set solid mass fraction, two-phase medium flow rate, and speed.
[0003] In existing pump tests, taking the transport of liquid water as an example, a water tank is usually placed at the pump inlet, and water is taken from the tank for testing. However, when dealing with solid-liquid two-phase media, the problem arises of how to accurately form the inlet conditions of a solid-liquid two-phase medium with a specified mass fraction of solid particles (i.e., the mass fraction of solids in the two-phase medium is difficult to control accurately during the experiment). Especially when the density of solid particles is smaller than that of liquid, solid particles usually float on top of the liquid. If solid particles are added to the water tank at this time, they will float on the top of the tank and be difficult to enter the pump inlet. More importantly, even if the solid particles in the water tank are mixed to a certain extent with the water through agitation, some solid particles enter the pump inlet with the transported water, making it difficult to accurately know the mass fraction of solid particles at the pump inlet. Therefore, it is impossible to accurately test the pump's transport characteristics under the action of a predetermined mass fraction of solid-liquid two-phase medium, which fails to meet the experimental requirements. Summary of the Invention
[0004] This invention provides a pump performance testing system to address the shortcomings of existing pump tests, which cannot construct a stable and uniformly mixed solid-liquid two-phase medium with a predetermined mass fraction, thus failing to accurately test the pump's transport characteristics under the action of a solid-liquid two-phase medium with a predetermined mass fraction and thus failing to meet testing requirements.
[0005] The present invention provides a pump performance testing system, comprising: a liquid storage device, a solid phase supply component, an inlet pipe, a pump under test, and an outlet pipe.
[0006] The liquid storage device has a storage chamber for storing liquid media; the solid phase supply assembly includes a solid phase conveying device, the discharge end of which can form a uniform solid phase flow; the inlet pipe includes a vertically arranged vertical pipe section, which is connected to the liquid storage device, and the discharge end of the solid phase conveying device is connected to the vertical pipe section through the side wall of the vertical pipe section; the inlet end of the pump under test is connected to the outlet end of the vertical pipe section, and the pump under test is used to drive the fluid circulation flow; the inlet end of the outlet pipe is connected to the outlet end of the pump under test, and the outlet end of the outlet pipe is connected to the liquid storage device.
[0007] According to the pump performance testing system provided by the present invention, a material conveying chamber is formed inside the solid phase conveying device, and the material conveying chamber is lower than the highest point of the liquid storage chamber.
[0008] According to the pump performance testing system provided by the present invention, the conveying chamber is inclined downward along the direction from the inlet end to the outlet end; the solid phase supply assembly further includes a first outlet pipe and a second outlet pipe, the inlet end of the first outlet pipe is connected to the outlet end of the conveying chamber, the inlet end of the second outlet pipe is connected to the outlet end of the first outlet pipe, and the outlet end of the second outlet pipe is connected to the vertical pipe section; the first outlet pipe is inclined downward along the direction from the inlet end to the outlet end, and the second outlet pipe is inclined upward along the direction from the inlet end to the outlet end.
[0009] The pump performance testing system provided by the present invention further includes a first control valve, which is disposed in the first discharge pipe or the second discharge pipe.
[0010] According to the pump performance testing system provided by the present invention, the solid phase conveying device is a screw feeding device, which includes a screw feeding mechanism and a material trough. The material trough forms the conveying cavity, and the screw feeding mechanism is located inside the conveying cavity.
[0011] According to the pump performance testing system provided by the present invention, the screw feeding device further includes a feeding hopper, the outlet end of which is connected to the inlet end of the hopper.
[0012] The pump performance testing system provided by the present invention further includes a vertically arranged vertical mixing pipe, the inlet end of which is connected to the outlet end of the vertical pipe section, and the outlet end of which is connected to the pump under test.
[0013] The pump performance testing system provided by the present invention further includes a second control valve and a third control valve, wherein the second control valve is disposed in the inlet pipe and the third control valve is disposed in the outlet pipe.
[0014] The pump performance testing system provided by the present invention further includes a first flow detection device and a second flow detection device, wherein the first flow detection device is disposed in the inlet pipe and the second flow detection device is disposed in the outlet pipe.
[0015] According to the pump performance testing system provided by the present invention, the liquid storage device is provided with an overflow structure, and the overflow structure is connected to the solid phase conveying device.
[0016] The pump performance testing system provided by this invention can continuously supply a stable and uniformly mixed solid-liquid two-phase medium at the inlet end of the pump under test when testing a pump with a solid medium density lower than that of the liquid medium. This makes the fluid properties more consistent with the actual pipeline system, thereby improving the testing accuracy of the system for the pump under test.
[0017] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0019] Figure 1 This is a schematic diagram of a pump performance testing system provided in one embodiment of the present invention.
[0020] Figure 2 This is a schematic diagram of the pump performance testing system provided in Embodiment 2 of the present invention.
[0021] Figure label:
[0022] 100. Liquid storage device; 110. Overflow structure; 200. Solid phase supply assembly; 210. Solid phase conveying device; 220. First discharge pipe; 230. Second discharge pipe; 240. First control valve; 250. Feed hopper; 300. Liquid inlet pipe; 310. Vertical pipe section; 320. Vertical mixing pipe; 330. Second control valve; 340. First flow detection device; 400. Pump to be tested; 500. Liquid outlet pipe; 510. Third control valve; 520. Second flow detection device; 600. Overflow pipeline. Detailed Implementation
[0023] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.
[0024] In the description of the embodiments of the present invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0025] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention according to the specific circumstances.
[0026] In embodiments of the present invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0027] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.
[0028] The following is combined Figure 1 and Figure 2 This invention describes the pump performance testing system provided by the present invention.
[0029] See Figure 1 As shown, the pump performance testing system provided in this embodiment of the invention includes: a liquid storage device 100, a solid phase supply component 200, an inlet pipe 300, a pump under test 400, and an outlet pipe 500.
[0030] The liquid storage device 100 has a storage chamber for storing liquid media; the solid phase supply assembly 200 includes a solid phase conveying device 210, the discharge end of which can form a uniform solid phase flow; the inlet pipe 300 includes a vertically arranged vertical pipe section 310, which is connected to the liquid storage device 100, and the discharge end of the solid phase conveying device 210 is connected to the vertical pipe section 310 through the side wall of the vertical pipe section 310; the inlet end of the test pump 400 is connected to the outlet end of the vertical pipe section 310, and the test pump 400 is used to drive the fluid circulation flow; the inlet end of the outlet pipe 500 is connected to the outlet end of the test pump 400, and the outlet end of the outlet pipe 500 is connected to the liquid storage device 100.
[0031] The pump performance testing system provided by this invention, when testing a pump 400 containing a solid-liquid two-phase mixture where the density of the solid phase medium is less than that of the liquid phase medium, can continuously supply a stable and uniformly mixed solid-liquid two-phase medium at the inlet end of the pump 400. This makes the fluid properties more consistent with the actual pipeline system, thereby improving the testing accuracy of the system for the pump 400. As an example, the solid phase medium can be ice, and the liquid phase medium can be water.
[0032] During the experiment, liquid was first supplied through the storage device 100. Driven by the test pump 400, the liquid medium circulated back to the storage device 100 via the inlet pipe 300, the test pump 400, and the outlet pipe 500. Since the discharge end of the solid phase conveying device 210 can form a uniform solid flow, the mixing ratio of the solid and liquid phases in the fluid can be precisely controlled by controlling the flow rate of the liquid medium in the inlet pipe 300. Furthermore, the discharge end of the solid phase conveying device 210 is connected to the vertical pipe section 310 through its sidewall. The liquid medium in the vertical pipe section 310 flows from bottom to top. When the solid medium enters the vertical pipe section 310, it can be uniformly dispersed, reducing particle aggregation and enhancing the interaction between the solid and liquid phases, further improving the uniformity of the solid-liquid two-phase mixture.
[0033] In the test system, pressure measuring points are set up in the upstream and downstream pipe sections of the pump under test 400. The pressure measuring points are close to the inlet and outlet flanges of the pump under test 400 to measure the pressure difference between the inlet and outlet of the pump under test 400, thereby obtaining the head of the test pump under given operating conditions.
[0034] By precisely controlling the mixing ratio of the solid-liquid two-phase medium in the fluid and controlling the uniformity of the solid-liquid two-phase mixture, the testing accuracy of the system for the pump 400 under test can be significantly improved.
[0035] It should be noted that the pump testing system provided by the present invention can precisely adjust the mixing ratio of the solid and liquid phase media in the fluid by controlling the amount of solid medium added and / or adjusting the flow rate of the liquid medium in the inlet pipe 300. It can also test the head, power and motor current of the pump under test 400 at a certain speed by adjusting the flow rate of the solid and liquid phase fluid, which has strong flexibility.
[0036] Specifically, the pump performance testing system includes: a liquid storage device 100, a solid phase supply component 200, an inlet pipe 300, a pump under test 400, and an outlet pipe 500.
[0037] The liquid storage device 100 stores the liquid medium, ensuring the supply of the required liquid medium in the system. The liquid storage device 100 has a set capacity to maintain the circulation of fluid in the system and ensure a stable supply of the liquid medium. The solid phase supply component 200 continuously and uniformly supplies the solid medium. The solid phase supply component 200 includes a solid phase conveying device 210. Since the discharge end of the solid phase conveying device 210 can form a uniform solid flow, a screw feeder or similar device can be used. The inlet pipe 300 is responsible for conveying the liquid medium from the liquid storage device 100 to the pump under test 400. The vertical section 310 of the inlet pipe 300 optimizes the uniformity of the mixing of the solid and liquid phases. The pump under test (PUT) 400 is the component under test and the driving component in the system. During the test, the PUT 400's rotational speed can be kept constant, and the mixing ratio and / or flow rate of the solid-liquid two-phase medium in the fluid can be adjusted to test parameters such as the head, power, and motor current of the PUT 400 at the current rotational speed. Alternatively, the mixing ratio and / or flow rate of the solid-liquid two-phase medium in the fluid can be kept constant to test parameters such as the head, power, and motor current of the PUT 400 at different rotational speeds. The outlet pipe 500 is used to return the solid-liquid two-phase medium flowing through the PUT 400 to the storage device 100, achieving circulation.
[0038] See Figure 1 As shown, according to some embodiments of the present invention, a conveying chamber is formed inside the solid phase conveying device 210, and the conveying chamber is lower than the highest point of the liquid storage chamber.
[0039] By setting a conveying chamber in the solid phase conveying device 210 and making the conveying chamber lower than the highest point of the liquid storage chamber, the liquid phase medium in the liquid storage device 100 can be introduced into the conveying chamber at the beginning of the test, so that the solid phase medium and the liquid phase medium are mixed in advance. Then, when it enters the vertical pipe section 310, it can be better mixed with the liquid phase medium to form a uniform solid-liquid two-phase mixed fluid, thereby further improving the test accuracy of the pump performance test system.
[0040] Specifically, since the material conveying chamber is lower than the highest point of the liquid storage chamber, the liquid medium in the liquid storage chamber can flow into the material conveying chamber under its own gravity.
[0041] See Figure 1 As shown, according to some embodiments of the present invention, the conveying chamber is inclined downward along the direction from the inlet end to the outlet end; the solid phase supply assembly 200 further includes a first outlet pipe 220 and a second outlet pipe 230, the inlet end of the first outlet pipe 220 is connected to the outlet end of the conveying chamber, the inlet end of the second outlet pipe 230 is connected to the outlet end of the first outlet pipe 220, and the outlet end of the second outlet pipe 230 is connected to the vertical pipe section 310; the first outlet pipe 220 is inclined downward along the direction from the inlet end to the outlet end, and the second outlet pipe 230 is inclined upward along the direction from the inlet end to the outlet end.
[0042] By setting the discharge chamber at an angle downwards along the direction from the inlet to the outlet, the liquid medium in the system can enter the discharge chamber and be pre-mixed with the solid medium. At the same time, by setting the first discharge pipe 220 at an angle downwards along the direction from the inlet to the outlet and the second discharge pipe 230 at an angle upwards along the direction from the inlet to the outlet, the first discharge pipe 220 and the second discharge pipe 230 can be used to connect the discharge chamber with the side wall of the vertical pipe section 310, and can effectively prevent the solid medium from accumulating and clogging in the discharge pipe.
[0043] Specifically, since the density of the solid phase medium is less than that of the liquid phase medium, the solid phase medium floats above the liquid phase medium in the discharge chamber. When the discharge chamber is inclined downwards along the direction from the inlet to the outlet, the liquid phase medium can first flow in smoothly and mix with the solid phase medium, ensuring that the two media can fully contact and initially mix. As the solid-liquid two-phase fluid flows out of the discharge chamber, the downward inclination of the first discharge pipe 220 allows the solid-liquid two-phase fluid to flow smoothly downwards under the action of gravity, preventing accumulation or blockage, while the upward inclination of the second discharge pipe 230 can guide the solid-liquid two-phase fluid in advance, providing a vertically upward flow velocity component, which facilitates its introduction into the vertical pipe section 310.
[0044] Preferably, the first discharge pipe 220 in this embodiment is relatively short, which can prevent the solid-liquid two-phase fluid from accumulating or blocking at the bend connection between the first discharge pipe 220 and the second discharge pipe 230.
[0045] See Figure 1 As shown, according to some embodiments of the present invention, the pump performance testing system further includes a first control valve 240, which is disposed in the first discharge pipe 220 or the second discharge pipe 230.
[0046] By installing a first control valve 240 on the first discharge pipe 220 or the second discharge pipe 230, the solid phase medium and the liquid phase medium can be isolated when the system is shut down, preventing them from mixing or causing unnecessary cross-influence.
[0047] As an example, in this embodiment, the first control valve 240 is located in the second discharge pipe 230. Of course, in some embodiments, the first control valve 240 may also be located in the first discharge pipe 220, and there is no special limitation on this.
[0048] See Figure 1 As shown, according to some embodiments of the present invention, the solid phase conveying device 210 is a screw feeding device, which includes a screw feeding mechanism and a material trough. The material trough forms a conveying cavity, and the screw feeding mechanism is located in the conveying cavity.
[0049] By employing a screw feeder as the solid phase conveying device 210, the screw feeder can push the solid medium through rotating screw blades, providing a stable and uniform solid phase flow, keeping the supply of the solid medium stable, and ensuring a stable mass fraction ratio of the solid and liquid two-phase fluids. At the same time, the feed trough facilitates the layout of the screw feeder mechanism and forms a conveying chamber for accommodating the initially mixed solid-liquid two-phase fluid.
[0050] See Figure 1 As shown, according to some embodiments of the present invention, the screw feeder further includes a feeding hopper 250, the outlet end of which is connected to the inlet end of the hopper.
[0051] By setting up the feeding hopper 250, solid medium can be continuously added to the screw feeder to ensure a stable supply of solid medium, and the amount of solid medium added can be obtained.
[0052] Preferably, in this embodiment, the feeding hopper 250 is integrally formed with the trough, which can eliminate the connection gap between the feeding hopper 250 and the trough and improve the sealing performance of the solid phase conveying device 210.
[0053] See Figure 1 As shown, according to some embodiments of the present invention, the pump performance testing system further includes a vertically arranged vertical mixing pipe 320, the inlet end of which is connected to the outlet end of the vertical pipe section 310, and the outlet end of the vertical mixing pipe is connected to the pump under test 400.
[0054] By setting a vertical mixing pipe 320 between the vertical pipe section 310 and the pump under test 400, the mixing effect of the solid and liquid media can be further optimized, the uniformity of the mixing can be improved, and thus the test accuracy of the system for the pump under test 400 can be further improved.
[0055] Specifically, the vertical mixing pipe can provide additional mixing space. When the fluid passes through the vertical mixing pipe, it can effectively eliminate flow instability caused by differences in flow velocity and eddies in the pipe, thereby reducing the impact on the accuracy of the test pump 400.
[0056] See Figure 1 As shown, according to some embodiments of the present invention, the pump performance testing system further includes a second control valve 330 and a third control valve 510, wherein the second control valve 330 is disposed in the inlet pipe 300 and the third control valve 510 is disposed in the outlet pipe 500.
[0057] By installing a second control valve 330 on the inlet pipe 300, the flow rate of the liquid medium can be adjusted, thereby regulating the mixing ratio of the liquid and solid media. This allows for testing of the operating parameters of the pump 400 under test with different mixing ratios of the solid-liquid two-phase fluid. When it is necessary to adjust the mixing ratio of the solid-liquid two-phase fluid, the second control valve 330 can achieve different liquid-to-solid ratios by adjusting the flow rate of the liquid medium. For example, if it is necessary to increase the proportion of the liquid medium, simply increase the flow rate of the liquid through the second control valve 330, thereby increasing the proportion of the liquid phase in the solid-liquid two-phase fluid; conversely, if it is necessary to increase the proportion of the solid medium, the flow rate of the liquid medium can be decreased through the second control valve 330. The mixing ratio of the solid-liquid two-phase fluid can also be adjusted by controlling the rotation speed of the solid transport device 210 to regulate the flow rate of the solid medium. For example, if it is necessary to increase the proportion of liquid medium, simply reduce the rotation speed of the solid phase conveying device 210 to decrease the flow rate of the solid medium, thereby increasing the proportion of liquid phase in the solid-liquid two-phase fluid; conversely, if it is necessary to increase the proportion of solid medium, the rotation speed of the solid phase conveying device 210 can be increased to increase the flow rate of the solid medium, thereby increasing the proportion of solid phase in the solid-liquid two-phase fluid. By providing a third control valve 510 on the outlet pipe 500, the transport flow rate of the solid-liquid two-phase medium in the outlet pipe 500 can be adjusted by controlling the opening degree of the third control valve 510. For example, when it is necessary to increase the transport flow rate of the solid-liquid two-phase medium in the outlet pipe 500, the opening degree of the third control valve 510 can be increased; correspondingly, when it is necessary to decrease the transport flow rate of the solid-liquid two-phase medium in the outlet pipe 500, the opening degree of the third control valve 510 can be decreased.
[0058] See Figure 1As shown, according to some embodiments of the present invention, the pump performance testing system further includes a first flow detection device 340 and a second flow detection device 520, wherein the first flow detection device 340 is disposed in the inlet pipe 300 and the second flow detection device 520 is disposed in the outlet pipe 500.
[0059] By installing a first flow detection device 340 on the inlet pipe 300, the flow rate of the liquid medium can be accurately detected, ensuring that the control and setting of the liquid medium flow rate meets the test requirements when testing the pump 400 under test. The first flow detection device 340 preferably uses a conventional electromagnetic flowmeter, which can accurately measure the flow rate of the liquid medium. Of course, in some embodiments, other flow detection devices capable of detecting the flow rate of the liquid medium can also be used, without special limitation. By installing a second flow detection device 520 on the outlet pipe 500, the flow rate of the fluid after passing through the pump 400 under test can be detected in real time, providing data feedback on the flow rate of the outlet pipe 500 to the system. Furthermore, the flow rate of the solid medium can be estimated from the test results of the first flow detection device 340 and the second flow detection device 520 without needing to record the added flow rate of the solid medium, simplifying the test operation. For example, when the added flow rate of the solid medium is difficult to determine, the flow rate of the solid medium can be estimated from the test results of the first flow detection device 340 and the second flow detection device 520.
[0060] See Figure 2 As shown, according to some embodiments of the present invention, the liquid storage device 100 is provided with an overflow structure 110, which is connected to the solid phase conveying device 210.
[0061] By setting an overflow structure 110 and connecting the overflow structure 110 to the solid phase conveying device 210, the solid phase medium in the solid-liquid two-phase material returning to the liquid storage device 100 can re-enter the solid phase conveying device 210 to achieve circulation, which can eliminate the workload of removing the solid phase medium and the manual amount of adding the solid phase medium in the liquid storage device 100 during long-term testing.
[0062] Specifically, the inlet of the overflow structure 110 is slightly lower than the liquid level in the storage device 100. Since the density of the solid medium is less than that of the liquid medium, after the solid and liquid two-phase materials return to the storage device 100, the solid medium can float on the liquid surface and reach the solid phase conveying device 210 via the overflow structure 110. The overflow structure 110 can be an overflow port, etc., and is connected to the solid phase conveying device 210 through the overflow pipe 600.
[0063] The test procedure of the pump performance testing system provided by this invention is described below. (See attached document.) Figure 1 and Figure 2 As shown.
[0064] During the experiment, liquid is first supplied through the storage device 100. Driven by the pump under test 400, the liquid medium circulates through the horizontal section of the inlet pipe 300, the second control valve 330, the first flow detection device 340, the vertical section 310 of the inlet pipe 300, the pump under test 400, the outlet pipe 500, the third control valve 510, and the second flow detection device 520 back to the storage device 100. The second control valve 330 is a regulating valve that can adjust the flow rate of the liquid medium, and the first flow detection device 340 can accurately measure the flow rate of the liquid medium.
[0065] Solid medium is added through hopper 250 and conveyed to the first feed pipe by a screw feeder. It then passes through the second feed pipe and the first control valve 240 before entering the vertical section 310 of the liquid inlet pipe 300 to mix with the liquid medium. The mixed solid-liquid two-phase medium enters the vertical mixing pipe for further homogenization before entering the valve to be tested. During the test, solid medium can be continuously added to the screw feeder through hopper 250 (the amount of solid medium added can be simultaneously recorded), ensuring a stable amount of solid medium. Combined with the screw feeder speed control, a stable solid flow can be formed at the discharge end of the screw feeder, ensuring that the flow rates of both the solid and liquid medium are constant during mixing. This results in a two-phase medium with a set solid mass dispersion, meeting the test requirements for the hydraulic characteristics of the pump 400 under test.
[0066] In the initial stage of the experiment, the liquid medium needs to be introduced into the conveying chamber of the solid phase conveying device 210 to initially mix with the solid and liquid phase media. This ensures that the solid medium can be more uniformly mixed with the liquid medium when it enters the inlet pipe 300, thereby improving the experimental accuracy. After the solid medium addition process is running stably, the flow rate of the solid medium in the solid-liquid two-phase medium is consistent with the added flow rate of the solid medium, meaning that the flow rate of the solid medium can be directly obtained. Combined with the flow rate of the liquid medium measured by the first flow detection device 340, the mass fraction of the solid medium in the solid-liquid two-phase medium can be calculated.
[0067] After flowing through the pump 400 under test, the solid-liquid two-phase medium returns to the storage device 100 via the outlet pipe 500, the second flow detection device 520, and the third control valve 510. The third control valve 510 is a regulating valve that can control the overall transport flow rate of the solid-liquid two-phase medium in the outlet pipe 500. The second flow detection device 520 can be used to detect the transport flow rate of the solid-liquid two-phase medium in the outlet pipe 500. When the amount of solid medium added is difficult to determine, the mass fraction of the solid medium in the solid-liquid two-phase medium can be calculated using the detection results of the first flow detection device 340 and the second flow detection device 520.
[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims
1. A pump performance testing system, characterized in that, include: A liquid storage device, wherein a liquid storage chamber for storing a liquid phase medium is formed within the liquid storage device; A solid phase supply assembly, comprising a solid phase conveying device, wherein the discharge end of the solid phase conveying device is capable of forming a uniform solid phase flow; The liquid inlet pipe includes a vertically arranged pipe section, which is connected to the liquid storage device. The discharge end of the solid phase conveying device is connected to the vertical pipe section through the side wall of the vertical pipe section. The pump under test has its inlet end connected to the outlet end of the vertical pipe section, and the pump under test is used to drive fluid circulation. The outlet pipe has its inlet end connected to the outlet end of the pump under test, and its outlet end connected to the liquid storage device. The solid phase conveying device has a conveying chamber formed inside, and the conveying chamber is lower than the highest point of the liquid storage chamber; The material conveying chamber is inclined downward along the direction from the inlet end to the outlet end; The solid phase supply assembly further includes a first discharge pipe and a second discharge pipe. The inlet end of the first discharge pipe is connected to the discharge end of the conveying chamber, the inlet end of the second discharge pipe is connected to the outlet end of the first discharge pipe, and the outlet end of the second discharge pipe is connected to the vertical pipe section. The first discharge pipe is inclined downward along the direction from the feed end to the discharge end, and the second discharge pipe is inclined upward along the direction from the feed end to the discharge end.
2. The pump performance testing system according to claim 1, characterized in that, It also includes a first control valve, which is located in the first discharge pipe or the second discharge pipe.
3. The pump performance testing system according to claim 1, characterized in that, The solid phase conveying device is a screw feeding device, which includes a screw feeding mechanism and a material trough. The material trough forms the conveying cavity, and the screw feeding mechanism is located inside the material conveying cavity.
4. The pump performance testing system according to claim 3, characterized in that, The screw feeder also includes a feeding hopper, the outlet end of which is connected to the inlet end of the feed hopper.
5. The pump performance testing system according to any one of claims 1 to 4, characterized in that, It also includes a vertically arranged mixing pipe, the inlet end of which is connected to the outlet end of the vertical pipe section, and the outlet end of which is connected to the pump under test.
6. The pump performance testing system according to any one of claims 1 to 4, characterized in that, It also includes a second control valve and a third control valve, the second control valve being located in the inlet pipe and the third control valve being located in the outlet pipe.
7. The pump performance testing system according to any one of claims 1 to 4, characterized in that, It also includes a first flow detection device and a second flow detection device, wherein the first flow detection device is located in the inlet pipe and the second flow detection device is located in the outlet pipe.
8. The pump performance testing system according to any one of claims 1 to 4, characterized in that, The liquid storage device is equipped with an overflow structure, which is connected to the solid phase conveying device.