Semi-open impeller pump structure

Abstract

The utility model discloses a semi-open type impeller pump structure. The semi-open type impeller pump structure comprises a pump body. The pump cover is detachably connected to the pump body and is matched with the pump body to form a mounting cavity; the semi-open type impeller is rotatably mounted in the mounting cavity and is provided with a center plate perpendicular to the rotating axis of the semi-open type impeller and main blades arranged on the front face of the center plate; the pump body lining plate is arranged between the center plate and the pump body and connected to the pump body. The pump body lining plate is matched with the shape of the back face of the center plate in the radial direction of the center plate. The pump cover lining plate is arranged between the main blade and the pump cover and connected to the pump cover, and the pump cover lining plate is matched with the main blade in shape.

Description

Technical Field

[0001] The present application belongs to the technical field of centrifugal pumps, and more specifically, to a semi-open impeller pump structure. Background Art

[0002] Semi-open impeller pumps are mainly used for pumping materials containing particles or beverages, etc., which require easy flushing of the impeller flow channel. Due to the casting size deviation of the pump body and pump cover, and the semi-open impeller has no impeller front cover plate, the pump body and pump cover have large processing errors and are not easy to inspect. Therefore, the gap between the front and rear sides of the impeller is not easy to control in the actual processing and assembly. The pump body and pump cover are often repeatedly processed due to the mismatch of the flow channels, and the matching gap is too large, resulting in low efficiency, low head, unstable performance, poor rotor interchangeability and other problems. At the same time, when the medium is running under the condition of more solid particles, the pump body, pump cover and other flow-passing parts are severely abraded. Directly replacing the pump body and pump cover will result in high cost of accessories and long construction period, leading to delays in on-site construction. In order to solve the above problems and ensure the reliable and stable performance of the pump and easy replacement of accessories, it is necessary to solve the above technical problems. Summary of the invention

[0003] The purpose of the embodiments of the present application is to provide a semi-open impeller pump structure to solve the technical problems existing in the prior art.

[0004] To achieve the above purpose, the technical solution adopted in this application is: to provide a semi-open impeller pump structure, including:

[0005] Pump body;

[0006] A pump cover, detachably connected to the pump body and cooperating with the pump body to form an installation cavity;

[0007] A semi-open impeller is rotatably mounted inside the mounting cavity, wherein the semi-open impeller has a web perpendicular to its own rotation axis and main blades arranged on the front side of the web;

[0008] A pump body lining plate, disposed between the web and the pump body and connected to the pump body, wherein the pump body lining plate is adapted to the back shape of the web along the radial direction of the web;

[0009] A pump cover lining plate is arranged between the main blade and the pump cover and connected to the pump cover, and the pump cover lining plate is adapted to the shape of the main blade.

[0010] Optionally, the pump body liner forms a hollow cavity open toward the pump body and is closed by the pump body.

[0011] Optionally, a sealing ring is provided at the connection between the pump body liner and the pump body.

[0012] Optionally, the pump cover is provided with a first mating surface and a second mating surface for abutting against the pump cover lining plate, and the first mating surface and the pump cover lining plate are provided with corresponding mounting holes for fastener installation;

[0013] The pump cover liner is detachably connected to the pump cover via the fastener.

[0014] Optionally, the first mating surface is perpendicular to the second mating surface.

[0015] Optionally, an edge of the web is provided with an inclined surface which is inclined toward the pump body and reduces the thickness of the web.

[0016] Optionally, the edge of the web is provided with a plurality of notches distributed at even intervals, wherein the notch is located between two adjacent main blades and forms a transition arc surface with the ends of the main blades.

[0017] Optionally, the back side of the web has a back blade having the same rotation direction as the main blade.

[0018] Optionally, the back blades include a first back blade and a second back blade that are evenly distributed;

[0019] The second back blade extends from the edge of the web to a middle position between two adjacent first back blades.

[0020] Optionally, a truncated cone coaxial with the web is protruded from the back side of the web, and the first back blade is arranged on the truncated cone.

[0021] The beneficial effect of the semi-open impeller pump structure provided by the present application is that: compared with the prior art, the semi-open impeller in the present application is rotatably mounted inside the mounting cavity, the pump body is used to form a pump body liner connected to the side wall of the mounting cavity, and the pump cover is used to form a pump cover liner connected to the side wall of the mounting cavity. Compared with the larger pump body and pump cover, the pump body liner and pump cover liner are easier to process and inspect for their matching with the front and rear side flow channels of the impeller, solving the problem of casting size deviation of each pump body and pump cover. After replacing different pump body liners and pump cover liners and replacing different impellers, the impeller can maintain a reasonable working gap with the pump body liner and pump cover liner, which is conducive to more stable rotation of the impeller on the one hand, and is also conducive to the processing and replacement of the impeller and elimination of pump body casting deviation on the other hand, that is, it can ensure that the gap flow of each pump is consistent, the rotor is interchangeable, and the gap is controlled within a reasonable range, so that the pump performance is reliable and stable, which is far superior to the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0023] Figure 1 A partial cross-sectional view of a semi-open impeller pump structure provided in an embodiment of the present application;

[0024] Figure 2 This is a schematic diagram of the impeller back blade structure provided in an embodiment of the present application.

[0025] Among them, the reference numerals in the figure are: 101, pump body; 102, pump cover; 103, semi-open impeller; 104, pump body lining; 105, pump cover lining; 106, air-avoiding cavity; 107, sealing ring; 121, first mating surface; 122, second mating surface; 123, fastener; 131, web; 132, main blade; 133, inclined surface; 134, notch; 135, transition arc surface; 136, first back blade; 137, second back blade; 138, cone. Implementation

[0026] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0027] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0028] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0029] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0030] Please also read Figure 1 and Figure 2 Now, a semi-open impeller pump structure provided in an embodiment of the present application is described. The semi-open impeller pump structure includes a pump body 101, a pump cover 102, a semi-open impeller 103, a pump body liner 104 and a pump cover liner 105. Among them:

[0031] The pump cover 102 is detachably connected to the pump body 101 and cooperates with the pump body 101 to form an installation cavity. The semi-open impeller 103 is rotatably installed inside the installation cavity. The semi-open impeller 103 has a web 131 perpendicular to its own rotation axis and a main blade 132 arranged on the front of the web 131. The pump body 101 liner is arranged between the web 131 and the pump body 101 and connected to the pump body 101. The pump body 101 liner is adapted to the back shape of the web 131 along the radial direction of the web 131. The pump cover liner 105 is arranged between the main blade 132 and the pump cover 102 and connected to the pump cover 102. The pump cover liner 105 is adapted to the shape of the main blade 132.

[0032] According to the above structure provided in this embodiment, since the pump body 101 is connected to the side wall for forming the installation cavity with the pump body liner 104, and the pump cover 102 is connected to the side wall for forming the installation cavity with the pump cover liner 105. Compared with the larger pump body 101 and pump cover 102, the pump body liner 104 and pump cover liner 105 are easier to process and inspect for matching between them and the front and rear side flow channels of the impeller 103, solving the problem of casting size deviation of each pump body 101 and pump cover 102. After replacing different pump body liners 104 and pump cover liners 105 and replacing different impellers 103, the impeller 103 can maintain a reasonable working clearance with the pump body liners 104 and pump cover liners 105. On the one hand, it is beneficial for the impeller 103 to rotate more stably, and on the other hand, it is also beneficial for the processing and replacement of the impeller 103 and the elimination of the casting deviation of the pump body 101, that is, it can ensure that the clearance of each pump remains consistent, the rotors are interchangeable, and the clearance is controlled within a reasonable range, so that the pump performance is reliable and stable, which is far superior to the existing technology.

[0033] In another embodiment of the present application, please refer to Figure 1 and Figure 2The pump body liner 104 forms a hollow cavity 106 which is open toward the pump body 101 and is closed by the pump body 101. According to the above structure provided in this embodiment, on the one hand, the pump body liner 104 can be better adapted to the shape of the web 131, and on the other hand, it is also helpful to reduce the weight of the pump body liner 104, thereby effectively reducing the weight of the overall pump structure.

[0034] In another embodiment of the present application, please refer to Figure 1 and Figure 2 A sealing ring 107 is provided at the connection between the pump body liner 104 and the pump body 101. According to the above structure provided in this embodiment, the sealing ring 107 can effectively prevent the liquid pumped by the semi-open impeller 103 from entering between the pump body liner 104 and the pump body 101, which is conducive to improving the service life of the semi-open impeller pump structure provided in this embodiment.

[0035] In another embodiment of the present application, please refer to Figure 1 and Figure 2 The pump cover 102 is provided with a first mating surface 121 and a second mating surface 122 for contacting with the pump cover liner 105. The first mating surface 121 and the pump cover liner 105 are provided with corresponding mounting holes for fasteners 123 to be installed. The pump cover liner 105 is detachably connected to the pump cover 102 through the fasteners 123. According to the above structure provided in this embodiment, the pump cover liner 105 can be quickly and conveniently connected to the pump cover 102, has a good and stable installation effect, and simplifies the processing of the pump cover 102. In another embodiment of the present application, please refer to Figure 1 and Figure 2 The first mating surface 121 is perpendicular to the second mating surface 122 , which can further improve the installation stability of the pump cover liner 105 .

[0036] In another embodiment of the present application, please refer to Figure 1 and Figure 2 The edge of the web 131 is provided with an inclined surface 133 which is inclined toward the pump body 101 and reduces the thickness of the web 131. According to the above structure provided in this embodiment, the inclined surface 133 provided on the edge of the web 131 is conducive to improving the head of the semi-open impeller pump structure provided in this embodiment, so that the semi-open impeller pump structure provided in this embodiment has a wider range of application scenarios.

[0037] In another embodiment of the present application, please refer to Figure 1 and Figure 2The edge of the web 131 is provided with a plurality of notches 134 distributed at even intervals, and the notches 134 are located between two adjacent main blades 132 and form a transition arc surface 135 with the ends of the main blades 132. According to the above structure provided in this embodiment, the notches 134 provided on the edge of the web 131 can further improve the head of the semi-open impeller pump structure, and have a better use effect.

[0038] In another embodiment of the present application, please refer to Figure 1 and Figure 2 , the back of the web 131 has a back blade with the same rotation direction as the main blade 132. According to the above structure provided in this embodiment, the back blade provided on the back of the web 131 is conducive to re-pumping the impurity particles that fall between the web 131 and the pump body liner 104 to the vicinity of the liquid outlet of the impeller and transporting them to the outside of the pump body 101 together with the pumping liquid, which is conducive to reducing the adverse effects of the particle impurities in the liquid medium on the shaft seal.

[0039] In another embodiment of the present application, please refer to Figure 1 and Figure 2 The back blades include evenly distributed first back blades 136 and second back blades 137, and the second back blades 137 extend from the edge of the web 131 to the middle position of two adjacent first back blades 136. According to the above structure provided in this embodiment, by staggered arrangement of the first back blades 136 and the second back blades 137 and the notch 134 at the edge of the web 131, the stirring and throwing effect of the granular impurities on one side of the back blade can be further improved, the deposition of granular impurities can be avoided, and the granular medium can be effectively prevented from entering the shaft seal, avoiding adverse effects on the shaft seal, and forming a better protective effect.

[0040] In another embodiment of the present application, please refer to Figure 1 and Figure 2The back of the web 131 is convex with a truncated cone 138 coaxial with the web 131, and the first back blade 136 is arranged on the truncated cone 138. According to the above structure provided in this embodiment, since the first back blade 136 and the second back blade 137 are located on different planes arranged along the axial direction of the web 131, the absorption effect of the back blades on particulate impurities can be further improved; at the same time, the pump body 101, pump cover 103, semi-open impeller 103, pump body liner 104, pump cover liner 105 and other flow-through parts in this embodiment can be made of high-chromium cast iron or duplex stainless steel with strong wear resistance; the body can also be made of conventional materials, and then the volute and semi-open impeller of the pump body 101 are made of stainless steel. The flow channel of the impeller 103, the pump body lining 104, the pump cover lining 105 and other weak and easily abraded parts are hardened by spraying Ni60, surfacing Stellite alloy and other methods. Through the above structural and material optimization, the performance of the semi-open impeller pump can be guaranteed to be stable and reliable during operation, and the rotors of the same pump (the combination of the semi-open impeller and the main shaft) can maintain good interchangeability, reducing the cost of replacing parts and the replacement period of parts. At the same time, the wear of the flow-through parts of the pump body 101 under the abrasion of solid particles can be effectively improved, thereby increasing the service life of the pump.

[0041] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A semi-open impeller pump structure, characterized in that: include: Pump body (101); A pump cover (102) is detachably connected to the pump body (101) and cooperates with the pump body (101) to form an installation cavity; A semi-open impeller (103) is rotatably mounted inside the mounting cavity, wherein the semi-open impeller (103) comprises a web (131) perpendicular to its own rotation axis and main blades (132) arranged on the front side of the web (131); a pump body lining plate (104) disposed between the web plate (131) and the pump body (101) and connected to the pump body (101), the pump body lining plate (104) being adapted to the back shape of the web plate (131) along the radial direction of the web plate (131); a pump cover lining plate (105), arranged between the main blade (132) and the pump cover (102) and connected to the pump cover (102), the pump cover lining plate (105) being adapted to the shape of the main blade (132); The edge of the web (131) is provided with a plurality of notches (134) distributed at even intervals, wherein the notch (134) is located between two adjacent main blades (132) and forms a transition cambered surface (135) with the ends of the main blades (132).

2. The semi-open impeller pump structure according to claim 1, characterized in that: The pump body lining (104) forms a hollow cavity (106) that is open toward the pump body (101) and is closed by the pump body (101).

3. The semi-open impeller pump structure according to claim 2, characterized in that: A sealing ring (107) is provided at the connection between the pump body lining plate (104) and the pump body (101).

4. The semi-open impeller pump structure according to claim 1, characterized in that: The pump cover (102) is provided with a first mating surface (121) and a second mating surface (122) for abutting against the pump cover lining plate (105); the first mating surface (121) and the pump cover lining plate (105) are provided with corresponding mounting holes for mounting fasteners (123); The pump cover lining (105) is detachably connected to the pump cover (102) via the fastener (123).

5. The semi-open impeller pump structure according to claim 4, characterized in that: The first mating surface (121) is perpendicular to the second mating surface (122).

6. The semi-open impeller pump structure according to claim 1, characterized in that: The edge of the web (131) is provided with an inclined surface (133) which is inclined toward the pump body (101) and reduces the thickness of the web (131).

7. The semi-open impeller pump structure according to claim 1, characterized in that: The back side of the web (131) has a back blade having the same rotation direction as the main blade (132).

8. The semi-open impeller pump structure according to claim 7, characterized in that: The back blades include evenly distributed first back blades (136) and second back blades (137); The second back blade (137) extends from the edge of the web (131) to a middle position between two adjacent first back blades (136).

9. The semi-open impeller pump structure according to claim 8, characterized in that: The back side of the web (131) is protruded with a truncated cone (138) coaxial with the web (131), and the first back blade (136) is arranged on the truncated cone (138).

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