Vortex pump with grinding function

Abstract

The invention provides a vortex pump with a grinding function, which comprises a pump shell and a semi-open impeller, the rotatable semi-open impeller is mounted in the pump shell, a movable grinding unit is arranged at an outlet of the semi-open impeller, a static grinding unit is supported in the pump shell, one end of the static grinding unit extends to the middle of the movable grinding unit, and the other end of the static grinding unit extends to the middle of the movable grinding unit. The method is used for forming at least two cutting layers. According to the invention, solid particles in a conveyed solid-liquid two-phase medium can be ground; the impeller does not need to be arranged at the rear, and a bladeless cavity in front of the impeller effectively plays a role in draining a high-speed medium, so that solid particles can smoothly flow out along a grinding part on the periphery of an outlet of the impeller, and liquid-phase media with different viscosities can be conveyed and fully stirred and mixed.

Description

Technical Field

[0001] The invention relates to the field of vortex pumps, in particular to a vortex pump with a grinding function. Background Art

[0002] The vortex pump is named because of the rotating vortex motion of the fluid inside it. The vortex pump is also called a non-clogging pump. It is a solid-liquid two-phase flow pump with good non-clogging performance. It has the advantages of simple structure and easy manufacturing. It can still operate smoothly when transporting complex media such as textiles, fur, wood chips and pulp. Therefore, it is more and more widely used in industrial production.

[0003] The vortex pump is composed of an impeller, a volute, a bearing seat, a pump casing, and inlet and outlet pipes. The bearing seat of the vortex pump is the same as that of a common centrifugal pump. The impeller and the pump casing are connected as a whole and are fixed to the long shaft with bolts to form the rotor component. The impeller is installed in the annular cavity on one side of the volute, and there is a wide axial space between the impeller and the front pump casing.

[0004] The liquid enters the impeller from the inlet pipe. When the impeller rotates, the energy of the medium increases due to the centrifugal force. The medium entering between the blades is pushed by the blades and moves with the impeller. The medium near the top of the impeller outlet forms a through flow due to the large centrifugal force, and the medium in the middle of the impeller forms a circulating flow. The through flow flows out through the pump cavity outlet, forming a certain head; the solid particles and fibers in the medium obtain energy under the action of the circulating flow, and most of them do not pass through the impeller, but move in the bladeless cavity and then flow directly out of the pump body from the diffusion section, thereby achieving the purpose of conveying complex media or fluids containing impurities. This feature makes the impeller less in contact with the solid phase, so the pump has good non-blocking performance and reduces the wear of the solid phase on the impeller, so the service life of the pump can be greatly improved. Because the pump has good suction performance, it has good anti-cavitation performance.

[0005] However, when the swirl pump delivers two liquid media of different viscosities, the two liquid media cannot be fully mixed, and the output medium is easy to separate. However, when the swirl pump delivers solid-liquid two-phase media, it will cause internal blockage of the swirl pump, resulting in reduced efficiency, affecting the stable operation of the pump system, and in severe cases, it may even cause significant damage to the pump body. Summary of the invention

[0006] In view of the shortcomings of the prior art, the present invention provides a cyclone pump with a grinding function, which can grind solid particles in the solid-liquid two-phase medium being transported; the impeller does not need to be placed at the rear, and the bladeless cavity in front of the impeller effectively plays the role of draining the high-speed medium, so that the solid particles can flow out smoothly along the grinding part outside the impeller outlet. It can also fully stir and mix the liquid phase medium with different viscosities.

[0007] The present invention achieves the above technical objectives through the following technical means.

[0008] A swirl pump with a grinding function includes a pump casing and a semi-open impeller. A rotatable semi-open impeller is installed inside the pump casing. A dynamic grinding unit is provided at the outlet of the semi-open impeller, and a static grinding unit is supported inside the pump casing. One end of the static grinding unit extends to the middle of the dynamic grinding unit to form at least two cutting layers.

[0009] Furthermore, the dynamic grinding unit includes a number of dynamic blades. The number of dynamic blades are arranged at intervals on the contour at the outlet of the semi-open impeller to form at least two layers of dynamic blade units. The static grinding unit includes a number of static blades. The number of static blades form at least one layer of static blade units, and the static blade units extend between two adjacent layers of dynamic blade units. Through the rotation of the dynamic blade units, the medium conveyed by the semi-open impeller is mixed or shredded.

[0010] Furthermore, the front cover surface of the semi-open impeller and the inner wall of the pump casing form a vaneless cavity. The vaneless cavity communicates with the pump inlet and the inlet of the cutting layer to evenly flow the medium at the pump inlet to the inlet of the cutting layer.

[0011] Furthermore, there is a gap between the outlet of the semi-open impeller and the dynamic grinding unit. The distance L of the gap < D / 4, where D is the outer diameter of the semi-open impeller.

[0012] Furthermore, a number of dynamic blades form at least two layers of annular dynamic blade units at the outlet of the semi-open impeller. A number of static blades form at least one layer of annular static blade units. The annular static blade units and the annular dynamic blade units form an annular cutting layer.

[0013] Furthermore, when the medium conveyed by the swirl pump is a mixed medium, the shape of the dynamic blade is a cuboid, and the shape of the static blade is a cuboid. Through the rotation of the dynamic blade units, the mixed medium is mixed and stirred at least twice.

[0014] Furthermore, when the medium conveyed by the swirl pump contains solid particles, the cross-section of the dynamic blade is trapezoidal, and the cross-section of the static blade is rectangular. Triangular cutting tips are provided on both sides of the cross-section of the rectangular static blade. The cutting tips on both sides are in contact with or have a gap with the contour of the dynamic blade. Through the rotation of the dynamic blade units, the solid particles are shredded.

[0015] Furthermore, the area of the trapezoidal cross-section of the dynamic blade gradually changes along the thickness direction, and the cross-section at the top of the dynamic blade is the smallest.

[0016] Furthermore, the dynamic blades between two adjacent layers of dynamic blade units are staggered.

[0017] The beneficial effects of the present invention are as follows:

[0018] 1. The vortex pump with grinding function described in the present invention is provided with a dynamic grinding unit at the outlet of the semi-open impeller, and a static grinding unit supported in the pump casing, wherein one end of the static grinding unit extends to the middle of the dynamic grinding unit, so as to form at least two cutting layers. The cutting layers can grind solid particles in the transported solid-liquid two-phase medium, thereby increasing the anti-clogging ability of the pump and improving the hydraulic efficiency. The cutting layers can also fully stir and mix the transported liquid media of different viscosities.

[0019] 2. The vortex pump with grinding function described in the present invention drives the grinding unit to rotate through the main shaft. When the fluid flows in from the pump inlet, the energy of the medium increases due to the centrifugal force when the impeller rotates, and the medium entering between the blades is pushed by the blades to move with the impeller. The medium near the top of the impeller outlet forms a through flow due to the large centrifugal force, and the medium in the middle of the impeller forms a circulating flow structure characteristic, which allows the solid-liquid two-phase high-energy fluid to flow out smoothly along the grinding part outside the impeller outlet. Thereby, the solid particles are ground into a size that will not clog, thereby enhancing the anti-clogging performance of the pump and improving its applicability. Because the impeller does not need to be placed at the back, the adverse effect on the performance of the pump caused by the development of the vortex in the vortex pump to a certain extent is eliminated, thereby improving the efficiency of the vortex pump.

[0020] 3. The swirl pump with grinding function described in the present invention has a trapezoidal cross-section of the moving blade, a rectangular cross-section of the stationary blade, triangular blade tips are provided on both sides of the rectangular cross-section of the stationary blade, and the blade tips on both sides are respectively in contact with the contour of the moving blade or there is a gap, which can make it more convenient to chop solid particles. The triangular blade tip can cut the solid particles through shear force to form broken medium particles, and the contour of the moving blade and the rectangular static blade contour can grind the medium particles into small particles.

[0021] 4. Compared with common vortex pumps, the vortex pump with grinding function described in the present invention has a clear structure and is easy to disassemble and to facilitate subsequent repair and maintenance. The moving blade and the stationary blade are respectively integrated into the impeller and the sleeve, thus simplifying the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. The drawings described below are some embodiments of the present invention. For ordinary technicians in this field, it is obvious that other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 This is a schematic diagram of the structure of the vortex pump with grinding function described in the present invention.

[0024] Figure 2This is a flow principle diagram of the bladeless cavity of the swirl pump with grinding function described in the present invention.

[0025] Figure 3 This is a schematic diagram of the dynamic grinding unit in Example 1 of the present invention.

[0026] Figure 4 Schematic diagram of the static grinding unit in Example 1 of the present invention.

[0027] Figure 5 This is a schematic diagram of the dynamic grinding unit in Example 2 of the present invention.

[0028] Figure 6 Schematic diagram of the static grinding unit in Example 2 of the present invention.

[0029] Figure 7 This is a cross-sectional view of the assembled dynamic and static grinding units in Example 2 of the present invention.

[0030] In the figure:

[0031] 1-water inlet; 2-pump casing; 3-static grinding unit; 4-sleeve; 5-moving blade; 6-water outlet; 7-static blade; 7-1-blade tip; 8-semi-open impeller; 9-moving grinding unit; 10-main shaft; 11-circulating flow; 12-through flow. DETAILED DESCRIPTION

[0032] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0033] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "axial", "radial", "vertical", "horizontal", "inner", "outer" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0034] In the present invention, unless otherwise clearly defined and limited, terms such as "installation", "connection", "linkage", "fixation", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] As Figure 1 shown, the swirl pump with grinding function according to the present invention includes a pump casing 2, a main shaft 10, and a semi-open impeller 8. The pump casing 2 is provided with a water inlet 1 and a water outlet 6. A stationary static grinding unit 3 is supported inside the pump casing 2. A rotatable semi-open impeller 8 is installed inside the pump casing 2. The semi-open impeller 8 is installed on the main shaft 10, and the main shaft 10 is driven to rotate by a power device, so that the semi-open impeller 8 rotates. A dynamic grinding unit 9 is provided at the outlet of the semi-open impeller 8. One end of the static grinding unit 3 extends to the middle of the dynamic grinding unit 9 for forming at least two cutting layers. The multi-layer cutting layer of the present invention cuts and grinds the solid particles in the medium conveyed from the semi-open impeller 8 into appropriate sizes, and then outputs from the outermost periphery of the dynamic grinding unit 9, and finally pumps out the conveyed fluid medium from the water outlet 6. By grinding the over-sized solid small particles in the fluid medium, a series of failures and losses caused by pump blockage can be avoided, the working efficiency of the water pump is improved, the application scenarios of the water pump are broadened, and the practicability is enhanced. The multi-layer cutting layer of the present invention can drive the multiple mixing of media with different viscosities to achieve sufficient mixing.

[0036] As Figure 1 and 2 shown, the front cover surface of the semi-open impeller 8 and the inner wall of the pump casing 2 form a bladeless cavity. The bladeless cavity communicates with the water inlet of the pump and the inlet of the cutting layer. The medium flows uniformly from the water inlet to the cutting layer through the guiding action of the bladeless cavity, so as to grind the solid particles in the medium into sizes that will not cause blockage and then send them out from the water outlet. At the same time, it avoids the adverse effects on the performance of the water pump caused by the long-term development of vortices due to the rear impeller, enhances the performance of the water pump, and improves the hydraulic efficiency. As Figure 2 shown, there is a gap between the outlet of the semi-open impeller 8 and the dynamic grinding unit 9. The distance L of the gap < D / 4, where D is the outer diameter of the semi-open impeller 8. The gap can ensure that there is enough space for solid particles to enter the cutting layer.

[0037] The dynamic grinding unit 9 includes a plurality of dynamic blades 5, which are arranged at intervals on the contour of the outlet of the semi-open impeller 8 to form at least two layers of dynamic blade units. The static grinding unit 3 includes a plurality of static blades 7, which form at least one layer of static blade units, and the static blade units extend between two adjacent layers of dynamic blade units. The dynamic blade units are used to mix or chop the medium transported by the semi-open impeller 8 through the rotation of the dynamic blade units.

[0038] Example 1

[0039] like Figure 3 and Figure 4 As shown, the outlet of the semi-open impeller 8 in Example 1 is provided with two layers of annular moving knife units, each layer of the moving knife units is composed of a number of circumferentially evenly distributed moving blades 5, and a layer of annular stationary knife unit is provided at one end of a sleeve, and the other end of the sleeve is fixed on the pump casing 2, the annular stationary knife unit is composed of a number of circumferentially evenly distributed stationary blades 7, and the annular stationary knife unit extends between the two layers of annular moving knife units, and the annular stationary knife unit and the annular moving knife unit form an annular cutting layer. There are two layers of annular cutting layers in Example 1.

[0040] The medium transported by the swirl pump in Example 1 is a mixed medium of different viscosities. The movable blade 5 is in the shape of a cuboid, and the stationary blade 7 is in the shape of a cuboid. Through the rotation of the movable blade unit, when the mixed medium passes through the first cutting layer, it is initially mixed by the influence of the rotating water flow. When the medium passes through the second cutting layer, it is stirred and mixed again, and finally the input different media are mixed into the required state.

[0041] The outlet of the semi-open impeller 8 in the first embodiment may be provided with three layers of annular moving knife units, and one end of the sleeve may be provided with two layers of annular stationary knife units.

[0042] Example 2

[0043] like Figure 5 , Figure 6 and Figure 7 On the basis of Example 1, the medium transported by the vortex pump in Example 2 contains solid particles, the cross-section of the moving blade 5 is trapezoidal, the cross-section of the stationary blade 7 is rectangular, and triangular blade tips 7-1 are provided on both sides of the rectangular cross-section of the stationary blade 7. The blade tips 7-1 on both sides are respectively in contact with the contours of the moving blades 5 on both sides or there are gaps. Through the rotation of the moving blade unit, the triangular blade tip can cut the solid particles through shear force to form broken medium particles, and the contour of the moving blade and the rectangular stationary blade contour can grind the medium particles into small particles, which are finally output from the water outlet 6.

[0044] In Example 2, the area of ​​the trapezoidal cross section of the moving blade 5 gradually decreases as the thickness increases, and the cross section of the top of the moving blade 5 is the smallest, which can ensure the strength of the root of the moving blade 5. In addition, the direction in which the trapezoidal cross section area decreases is opposite to the flow direction, so that large particles can be positioned between two adjacent moving blades 5, which is convenient for cutting by the blade tip 7-1. In addition, the moving blades 5 between two adjacent layers of moving blade units are staggered.

[0045] The static grinding unit 3 and the dynamic grinding unit 9 of the present invention can be easily disassembled; different forms of blade solutions can be selected according to actual working purposes, thereby providing more choices and being applicable to different scenarios.

[0046] The working principle is:

[0047] When the vortex pump is working, the external pumping system continuously inputs a solid-liquid two-phase flow medium of a certain pressure into the water inlet 1. The medium flows through the semi-open impeller 8 and is acted upon by the impeller. The medium near the main shaft 10 is acted upon by the axial force to form a circulating flow, while the medium near the outlet of the semi-open impeller 8 is acted upon by the centrifugal force perpendicular to the axial direction to form a through flow, that is, the medium is directed to the cutting layer through the bladeless cavity, and then the solid particles in the medium are cut and ground to a suitable size, so that the water pump will not be blocked, resulting in reduced working efficiency or damage to the machine equipment. Finally, it is pumped out through the water outlet 6. The present invention can make the vortex pump reversibly applicable to different functional requirements under different actual needs through simple adjustments, increase the practicality of the water pump, effectively improve the performance of the water pump, and improve the efficiency of the vortex pump.

[0048] The dynamic and static grinding units are easy to disassemble, and the dynamic and static grinding units of different structures can be replaced according to the actual situation of the conveying medium. In this way, the vortex pump with grinding function can be more flexibly applied to work contents under different situations, thereby enhancing its practicality.

[0049] It should be understood that although this specification is described according to various embodiments, not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0050] The series of detailed descriptions listed above are only specific descriptions of feasible embodiments of the present invention. They are not intended to limit the scope of protection of the present invention. All equivalent embodiments or changes that do not deviate from the technical spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. A cyclone pump with a grinding function, comprising a pump casing (2) and a semi-open impeller (8), wherein the semi-open impeller (8) is rotatably mounted in the pump casing (2), characterized in that: At the outlet of the semi-open impeller (8), a dynamic grinding unit (9) is provided. A static grinding unit (3) is supported inside the pump casing (2). One end of the static grinding unit (3) extends into the middle of the dynamic grinding unit (9) to form at least two cutting layers.

2. The cyclone pump with grinding function according to claim 1, characterized in that: The dynamic grinding unit (9) includes a number of dynamic blades (5). The number of dynamic blades (5) are arranged at intervals on the contour at the outlet of the semi-open impeller (8) to form at least two layers of dynamic blade units. The static grinding unit (3) includes a number of static blades (7). The number of static blades (7) form at least one layer of static blade units, and the static blade units extend between two adjacent layers of dynamic blade units. By the rotation of the dynamic blade units, the medium conveyed by the semi-open impeller (8) is mixed or shredded.

3. The cyclone pump with grinding function according to claim 1, characterized in that: The front cover surface of the semi-open impeller (8) and the inner wall of the pump casing (2) form a vaneless cavity. The vaneless cavity communicates the pump inlet (1) with the inlet of the cutting layer to evenly flow the medium at the pump inlet (1) to the inlet of the cutting layer.

4. The cyclone pump with grinding function according to claim 1, characterized in that: There is a gap between the outlet of the semi-open impeller (8) and the dynamic grinding unit (9). The distance L of the gap is less than D / 4, where D is the outer diameter of the semi-open impeller (8).

5. The cyclone pump with grinding function according to claim 2, characterized in that: A number of dynamic blades (5) form at least two layers of annular dynamic blade units at the outlet of the semi-open impeller (8). A number of static blades (7) form at least one layer of annular static blade units. The annular static blade units and the annular dynamic blade units form an annular cutting layer.

6. The cyclone pump with grinding function according to claim 5, characterized in that: When the medium conveyed by the vortex pump is a mixed medium, the shape of the dynamic blade (5) is a cuboid, and the shape of the static blade (7) is a cuboid. By the rotation of the dynamic blade units, the mixed medium is mixed and stirred at least twice.

7. The cyclone pump with grinding function according to claim 5, characterized in that: When the medium conveyed by the vortex pump contains solid particles, the cross-section of the dynamic blade (5) is trapezoidal, and the cross-section of the static blade (7) is rectangular. Triangular blade tips (7-1) are provided on both sides of the cross-section of the rectangular static blade (7). The blade tips (7-1) on both sides are in contact with or have a gap with the contours of the dynamic blades (5) on both sides. By the rotation of the dynamic blade units, the solid particles are shredded.

8. The cyclone pump with grinding function according to claim 7, characterized in that: The area of the trapezoidal cross-section of the dynamic blade (5) gradually changes along the thickness direction, and the cross-section at the top of the dynamic blade (5) is the smallest.

9. The cyclone pump with grinding function according to claim 7, characterized in that: The dynamic blades (5) between two adjacent layers of dynamic blade units are staggered.

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