CN209841585U - Cavitation test device for vortex pump - Google Patents
Cavitation test device for vortex pump Download PDFInfo
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- CN209841585U CN209841585U CN201920084161.1U CN201920084161U CN209841585U CN 209841585 U CN209841585 U CN 209841585U CN 201920084161 U CN201920084161 U CN 201920084161U CN 209841585 U CN209841585 U CN 209841585U
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- 229910001018 Cast iron Inorganic materials 0.000 claims abstract description 5
- 230000008676 import Effects 0.000 abstract description 5
- 230000002787 reinforcement Effects 0.000 abstract description 5
- 230000003628 erosive effect Effects 0.000 description 10
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Abstract
The utility model provides a cavitation test device of a vortex pump, which comprises a vortex pump and a reinforcing bracket, wherein the vortex pump comprises a pump shell, a rear cover plate, an inlet pipe and an outlet pipe; the pump shell comprises a side wall and an end wall, the side wall is connected with the end wall to form a pump cavity, the inlet pipe is connected with the end wall, the rear cover plate is connected with one end of the side wall, which is far away from the end wall, the outlet pipe is arranged on the side wall, and the inlet pipe and the outlet pipe are respectively communicated with the pump cavity; the reinforcing support is sleeved on the outer side of the inlet pipe and connected with the front end of the pump shell, one end, far away from the pump shell, of the inlet pipe is supported on the reinforcing support, and the reinforcing support is provided with a hollow area for observation; at least a partial region of the end wall is a first visualization region and at least a partial region of the inlet tube is a second visualization region. The utility model discloses an import pipe and the end wall of pump case part at least adopt organic glass preparation to guarantee the visual nature of test device, and hardness and wearability have been guaranteed to all the other parts adoption cast iron, and the import pipe periphery is equipped with the reinforcement support and guarantees holistic stability.
Description
Technical Field
The utility model relates to a cavitation erosion test equipment technical field, in particular to vortex pump cavitation erosion test device.
Background
Cavitation involves various complex flow phenomena such as phase change, unsteadiness, multidimensional turbulence and compressibility, and causes problems such as vibration, noise and performance degradation in fluid machinery. When the pump works under the cavitation condition for a long time, certain parts of pump flow-through components are corroded and damaged, because the metal surface is strongly impacted by high frequency 600-25000 Hz when bubbles are condensed, the pressure reaches 49MPa, so that pits appear on the metal surface to cause perforation, and the cavitation damage is accompanied by various complicated effects such as electrolysis, chemical corrosion and the like besides the mechanical force effect. Therefore, cavitation in hydraulic machines such as pumps has been a hot point of research at home and abroad.
The swirl pump is a non-clogging pump suitable for conveying mixed media, and compared with a common centrifugal pump, the swirl pump has the following advantages obviously: 1. the structure is simple, the manufacture is easy, and the operation is stable; 2. no fit clearance exists between the impeller and the pump body; 3. good anti-blocking performance and less damage to materials. Due to the advantages, the vortex pump is more and more popular in the market and more widely applicable, and plays an important role in the industries of chemical industry, pharmacy, sewage treatment, paper making and the like.
Under the strong call of the state on energy conservation and emission reduction, efficiency and performance of existing products are optimized in various industries. In the hydraulic machinery, the efficiency is far from insufficient, especially in the hydraulic machinery such as a vortex pump used under the working condition of multiphase flow, cavitation always hinders the problem of updating and upgrading products, along with the generation of cavitation erosion, not only can the flow passage part be physically damaged, but also the non-blocking characteristic of the pump is affected by the condition of variable working conditions brought by the physical damage, and the normal operation of the whole unit is damaged in serious cases. And along with the improvement of experimental condition, more and more scholars also begin to study and pay close attention to the mechanism of flow in the heterogeneous flow pump, consequently utility model a device suitable for vortex pump cavitation test has great meaning.
Through retrieval, a patent of a visual cavitation flow cavitation erosion synchronous testing device (application No. 201710261777.7) is disclosed, which mainly aims at the problems of nozzle internal cavitation and nozzle internal cavitation erosion in a diesel engine. The patent of 'a visual test device for measuring cavitation erosion relation' (application number: 201610190058.6) discloses that the device can induce cavitation generation in a test section and can better observe the generation of cavitation bubbles in the test section, but the device cannot be effectively applied to all hydraulic machines such as a vortex pump. The rotational flow pump has a special structure, which causes different flow fields and is similar to a common centrifugal pump, so that a more specially-configured device is needed to observe the evolution process of cavitation and cavitation erosion, and the cavitation erosion characteristic of the rotational flow pump is researched.
SUMMERY OF THE UTILITY MODEL
In order to solve at least one technical problem, the utility model discloses a cavitation test device of a vortex pump, which comprises a vortex pump and a reinforcing bracket,
the cyclone pump comprises a pump shell, a rear cover plate, an inlet pipe and an outlet pipe;
the pump casing includes a side wall and an end wall, the side wall being joined to the end wall to form a pump chamber,
the inlet pipe is connected with the end wall, the rear cover plate is connected with one end, far away from the end wall, of the side wall, the outlet pipe is arranged on the side wall, and the inlet pipe and the outlet pipe are respectively communicated with the pump cavity;
the reinforcing support is sleeved on the outer side of the inlet pipe and connected with the front end of the pump shell, one end, far away from the pump shell, of the inlet pipe is supported on the reinforcing support, and the reinforcing support is provided with a hollowed-out area for observation;
at least a partial region of the end wall is a first visualization region and at least a partial region of the inlet tube is a second visualization region.
Further, the material of the first visualization region and the second visualization region is organic glass (also called polymethyl methacrylate).
Further, the first and second visualization regions are polished for reducing refraction. The inlet pipe and all the areas of the end wall are made of organic glass.
Further, the inlet pipe is in clearance fit with the end wall, and the inlet pipe and the end wall are connected in a sealing mode through bonding.
Further, the reinforcing bracket comprises a flange plate, a connecting ring and a plurality of rib plates, the flange plate and the connecting ring are separated by a preset distance, the plurality of rib plates are positioned between the flange plate and the connecting ring,
one end of each rib plate is connected with the flange plate, the other end of each rib plate is connected with the connecting ring, and the plurality of rib plates are arranged at intervals along the circumferential direction of the connecting ring;
the connecting ring is detachably connected with the end wall through a connecting piece.
Further, it is a plurality of be formed with between the floor fretwork is regional, the fretwork is regional to be convenient for install high frequency camera and experimental the shooting, avoid high frequency camera with the vibrations that the vortex pump contact and produce.
Further, the inlet pipe is a circular pipe, and the length of the inlet pipe is 10-15 times of the diameter of the inlet pipe.
Further, the cyclone pump further comprises an impeller, and the impeller is positioned in the pump cavity;
the testing device further comprises a motor, one end of an output shaft of the motor is located in the pump cavity, the impeller is fixed on the output shaft through a connecting piece, and the output shaft can drive the impeller to rotate. Specifically, by means of a coupling such as an impeller nut.
Furthermore, the side wall and the rear cover plate are made of cast iron.
Furthermore, the test device also comprises an inlet pressure measuring pipe, and one end of the inlet pipe, which is far away from the end wall, is communicated with the inlet pressure measuring pipe through the flange plate.
Further, the testing device further comprises an outlet pressure measuring pipe, the outlet pressure measuring pipe is communicated with the outlet pipe, and an outlet valve is further arranged on the outlet pressure measuring pipe.
Adopt above-mentioned technical scheme, test device have following beneficial effect:
1) the utility model discloses test device is according to the cavitation test characteristics of volute pump and special design, the volute pump is used for pumping complex medium, in case take place the cavitation will be more violent vibrations than the clear water pump during operation along with, consequently, design the stability that the system is ensured to the reinforcement support in import pipe periphery, the device can the additional vibrational force of system when effectual elimination is experimental, reduce vibration amplitude, the reliability of maintenance device junction, in addition, the reinforcement support can protect the organic glass part to deposit the in-process at the device installation and reduce the scraping and collide with, improve device safety factor.
2) The utility model discloses test device except can reaching the visual requirement in the vortex pump cavitation test, the device can also reduce the assembly degree of difficulty, improves factor of safety in the transportation and deposits, and the material selection of device itself can guarantee to guarantee its life in long-term vortex pump test.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a cavitation test device for a vortex pump;
FIG. 2 is a partial three-dimensional schematic view of a cavitation erosion test device for a vortex pump.
The following is a supplementary description of the drawings:
1. the pressure measuring device comprises an inlet pressure measuring pipe, 2 ribs, 3 inlet pipes, 4 end walls, 5 side walls, 6 impellers, 7 bolts, 8 outlet pipes, 9 outlet pressure measuring pipes, 10 outlet valves, 11 motors and 12 screws.
Detailed Description
The technical solution in 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. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
Reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with at least one implementation of the invention is included. In the description of the present invention, it is to be understood that the terms "upper", "lower", "top", "bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Moreover, the terms "first," "second," and the like are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or otherwise described herein.
Referring to fig. 1 and 2, the device for testing cavitation erosion of the vortex pump comprises a vortex pump and a reinforcing bracket, wherein the vortex pump comprises a pump shell, a rear cover plate, an inlet pipe 3 and an outlet pipe 8;
the pump shell comprises a side wall 5 and an end wall 4, the side wall 5 is connected with the end wall 4 to form a pump cavity, the inlet pipe 3 is connected with the end wall 4, the rear cover plate is connected with one end, far away from the end wall 4, of the side wall 5, the outlet pipe 8 is arranged on the side wall 5, and the inlet pipe 3 and the outlet pipe 8 are respectively communicated with the pump cavity;
the reinforcing support is sleeved outside the inlet pipe 3 and connected with the front end of the pump shell, one end, far away from the pump shell, of the inlet pipe 3 is supported on the reinforcing support, and the reinforcing support is provided with a hollow area for observation;
at least a partial region of the end wall 4 is a first visualization region and at least a partial region of the inlet tube 3 is a second visualization region.
Specifically, the rear cover plate is connected with one end of the side wall 5 far away from the end wall 4 through a plurality of bolts 7.
In some embodiments, the material of the first and second visualization regions is organic glass (also referred to as polymethyl methacrylate).
In some embodiments, the first and second visualization regions are polished for reducing refraction. In addition, shooting clarity can be increased.
The first visual area and the second visual area are selected at a position with light abrasion according to the internal flowing characteristics of the vortex pump, and the position can completely observe a cavitation derivation process, and meanwhile, the visual window can be still clear after long-term work. The device is different from a common visual test device, and visual materials (organic glass) are selected to be used in partial areas according to the flow characteristics and the cavitation characteristics of the vortex pump, so that the feasibility of an observation experiment can be guaranteed, the hardness of the whole device is improved to the maximum extent, and the abrasion of the pump shell and other overflowing parts caused by pumping solid particles for a long time is avoided.
In some embodiments, the inlet tube 3 and the end wall 4 are made of plexiglass over their entire area.
In some embodiments, the inlet tube 3 is a clearance fit with the end wall 4, and the inlet tube 3 and the end wall 4 are sealingly connected by bonding. In particular organic glass glue. The reinforcing support comprises a flange plate, a connecting ring and a plurality of rib plates 2, the flange plate and the connecting ring are separated by a preset distance, the plurality of rib plates 2 are positioned between the flange plate and the connecting ring,
one end of each rib plate 2 is connected with the flange plate, the other end of each rib plate 2 is connected with the connecting ring, and the plurality of rib plates 2 are arranged at intervals along the circumferential direction of the connecting ring;
in some embodiments, the connection ring is removably connected to the end wall 4 by a connector. In particular, the connection ring is connected to the end wall 4 by means of a plurality of screws 12.
In some embodiments, a plurality of the hollow areas are formed between the plurality of rib plates 2, and the hollow areas are convenient for installing a high-frequency camera and shooting in a test, so as to avoid the vibration generated by the contact between the high-frequency camera and the vortex pump. The plurality of rib plates 2 can reduce scraping of the pipe wall of the inlet pipe 3 during installation or storage, and are convenient for repeated installation, test and measurement equipment and the like. Specifically, the number of the ribs 2 is three.
In some embodiments, the inlet pipe 3 and the end wall 4 are bonded and connected, and the supporting function of the reinforcing bracket is matched, so that the hydraulic excitation force and the system vibration additional force existing on the inlet pipe 3 can be eliminated when the vortex pump operates, the second visual area of the inlet pipe 3 is not easily shattered, and the vibration amplitude of the inlet pipe 3 can be reduced. Especially, when carrying the granule and taking place the cavitation, can be accompanied with obvious vibrations, reinforced floor 2 can effectually keep whole device stable when experimental, is favorable to improving experimental shooting effect.
In some embodiments, the inlet tube 3 is a round tube, and the length of the inlet tube 3 is 10-15 times the diameter of the inlet tube 3.
In some embodiments, the vortex pump further comprises an impeller 6, the impeller 6 being located within the pump chamber; the testing device further comprises a motor 11, one end of an output shaft of the motor 11 is located in the pump cavity, the impeller 6 is fixed on the output shaft through a connecting piece, and the output shaft can drive the impeller 6 to rotate. Specifically, by means of a coupling member such as a nut of the impeller 6.
When carrying out the cavitation test, the accessible import pipe 3 with its cavitation evolution process is observed to end wall 4, consolidate the support the fretwork region can install the high frequency camera and test the shooting, and is convenient for guarantee experimental and the stable of shooting go on.
In some embodiments, the material of the side walls 5 and the back cover plate is cast iron. The cast iron is adopted for manufacturing, so that the cost is reduced, the use frequency is increased, and the service life is prolonged.
In some embodiments, the test device further comprises an inlet pressure measuring pipe 1, and one end of the inlet pipe 3, which is far away from the end wall 4, is communicated with the inlet pressure measuring pipe 1 through the flange.
In some embodiments, the testing apparatus further comprises an outlet pressure measuring pipe 9, the outlet pressure measuring pipe 9 is communicated with the outlet pipe 8, and an outlet valve 10 is further disposed on the outlet pressure measuring pipe 9.
The utility model discloses test device is according to the cavitation test characteristics of volute pump and special design, the volute pump is used for pumping complex medium, in case take place the cavitation will be more violent vibrations than the clear water pump during operation along with, consequently, design the stability that the system is ensured to the reinforcement support in import pipe periphery, the device can the additional vibrational force of system when effectual elimination is experimental, reduce vibration amplitude, the reliability of maintenance device junction, in addition, the reinforcement support can protect the organic glass part to deposit the in-process at the device installation and reduce the scraping and collide with, improve device safety factor.
The utility model discloses test device except can reaching the visual requirement in the vortex pump cavitation test, the device can also reduce the assembly degree of difficulty, improves factor of safety in the transportation and deposits, and the material selection of device itself can guarantee to guarantee its life in long-term vortex pump test.
The utility model discloses the test device can be used to the cavitation visual test of the no jam pump of spiral-flow type, also can be used to survey the transport of containing long fiber (like straw, plastics, rope), solid particle (like billet, plastic pellet etc.) medium in the pump, researches its solid phase motion law, uses extensively, operates steadily, and its reliability, security, life-span etc. all are superior to other similar devices.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (10)
1. The utility model provides a vortex pump cavitation test device which characterized in that: comprises a cyclone pump and a reinforcing bracket,
the cyclone pump comprises a pump shell, a rear cover plate, an inlet pipe (3) and an outlet pipe (8);
the pump shell comprises a side wall (5) and an end wall (4), the side wall (5) and the end wall (4) are connected to form a pump cavity,
the inlet pipe (3) is connected with the end wall (4), the rear cover plate is connected with one end, far away from the end wall (4), of the side wall (5), the outlet pipe (8) is arranged on the side wall (5), and the inlet pipe (3) and the outlet pipe (8) are respectively communicated with the pump cavity;
the reinforcing support is sleeved on the outer side of the inlet pipe (3), the reinforcing support is connected with the front end of the pump shell, one end, far away from the pump shell, of the inlet pipe (3) is supported on the reinforcing support, and the reinforcing support is provided with a hollowed-out area for observation;
at least a partial region of the end wall (4) is a first visualization region and at least a partial region of the inlet tube (3) is a second visualization region.
2. The test device of claim 1, wherein: the first visual region and the second visual region are made of organic glass.
3. The test device of claim 1, wherein: the inlet pipe (3) and the end wall (4) are all made of organic glass.
4. The test device of claim 1, wherein: the inlet pipe (3) is in clearance fit with the end wall (4), and the inlet pipe (3) is hermetically connected with the end wall (4) in a bonding mode.
5. The test device of any one of claims 1-4, wherein: the reinforcing support comprises a flange plate, a connecting ring and a plurality of rib plates (2), the flange plate and the connecting ring are separated by a preset distance, the plurality of rib plates (2) are positioned between the flange plate and the connecting ring,
one end of each rib plate (2) is connected with the flange plate, the other end of each rib plate (2) is connected with the connecting ring, and the plurality of rib plates (2) are arranged at intervals along the circumferential direction of the connecting ring;
the connecting ring is detachably connected with the end wall (4) through a connecting piece.
6. The test device of claim 5, wherein: a plurality of hollow areas are formed between the rib plates (2), and high-frequency cameras and test shooting are convenient to install in the hollow areas.
7. The test device of any one of claims 1-4, wherein: the inlet pipe (3) is a round pipe, and the length of the inlet pipe (3) is 10-15 times of the diameter of the inlet pipe (3).
8. The test device of any one of claims 1-4, wherein: the cyclone pump also comprises an impeller (6), and the impeller (6) is positioned in the pump cavity;
the testing device further comprises a motor (11), one end of an output shaft of the motor (11) is located in the pump cavity, the impeller (6) is fixed on the output shaft through a connecting piece, and the output shaft can drive the impeller (6) to rotate.
9. The test device of any one of claims 1-4, wherein: the side wall (5) and the rear cover plate are made of cast iron.
10. The test device of claim 5, wherein: the testing device further comprises an inlet pressure measuring pipe (1), and one end, far away from the end wall (4), of the inlet pipe (3) is communicated with the inlet pressure measuring pipe (1) through the flange plate;
the testing device further comprises an outlet pressure measuring pipe (9), the outlet pressure measuring pipe (9) is communicated with the outlet pipe (8), and an outlet valve (10) is further arranged on the outlet pressure measuring pipe (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920084161.1U CN209841585U (en) | 2019-01-17 | 2019-01-17 | Cavitation test device for vortex pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920084161.1U CN209841585U (en) | 2019-01-17 | 2019-01-17 | Cavitation test device for vortex pump |
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| Publication Number | Publication Date |
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| CN209841585U true CN209841585U (en) | 2019-12-24 |
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| CN201920084161.1U Expired - Fee Related CN209841585U (en) | 2019-01-17 | 2019-01-17 | Cavitation test device for vortex pump |
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| CN (1) | CN209841585U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109724891A (en) * | 2019-01-17 | 2019-05-07 | 江苏大学镇江流体工程装备技术研究院 | A kind of Turo pump cavitation test device |
-
2019
- 2019-01-17 CN CN201920084161.1U patent/CN209841585U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109724891A (en) * | 2019-01-17 | 2019-05-07 | 江苏大学镇江流体工程装备技术研究院 | A kind of Turo pump cavitation test device |
| CN109724891B (en) * | 2019-01-17 | 2024-06-18 | 江苏大学镇江流体工程装备技术研究院 | Cavitation erosion test device for rotational flow pump |
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Granted publication date: 20191224 |