Novel axial flow pump sealing structure

Abstract

The invention belongs to the technical field of axial flow pumps, and particularly relates to a novel axial flow pump sealing structure which comprises a pump body and a sealing ring, the sealing ring is arranged at the pump shell splicing position of the pump body, the sealing ring is annular and is provided with an upper sealing abutting face and a lower sealing abutting face used for sealing, and first deformation notches are formed in the inner side and the outer side of the sealing ring correspondingly; the sealing abutting face is provided with sealing parts distributed at equal intervals, a second deformation notch is formed between every two adjacent sealing parts, an elastic supporting ring is arranged in the sealing ring, and a second deformation cavity is formed in the position, in the elastic supporting ring, of the sealing ring. According to the invention, the sealing contact surface with the annular lip plate is arranged at the contact part of the sealing ring and the pump shell, and the annular lip plate formed on the sealing contact surface is matched with the sealing part, so that a plurality of sealing contact surfaces are formed on the sealing ring, the sealing performance is further improved, the failure rate is effectively reduced, and the purpose of stable use is achieved; the use is convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of axial flow pumps, in particular to a novel sealing structure for axial flow pumps. Background Art

[0002] Axial flow pumps, as a common fluid conveying equipment, are widely used in water conservancy projects, industrial water supply and drainage, and other fields. The sealing structure plays a vital role in the operation of an axial flow pump, and its performance directly affects the pump's efficiency, reliability, and service life.

[0003] When assembling the pump casing of an existing axial flow pump, a sealing ring is installed at the joints of the various components for sealing. However, the existing sealing ring can only form a stable sealing contact surface at the contact part of the pump casing. Once a fault occurs, normal sealing cannot be performed, which is inconvenient to use. Summary of the Invention

[0004] (1) Technical problems solved

[0005] In response to the deficiencies of the prior art, the present invention provides a new axial flow pump sealing structure, which solves the problem that the existing sealing ring can only form a stable sealing contact surface at the contact part of the pump casing, and cannot perform normal sealing once a fault occurs, making it inconvenient to use.

[0006] (2) Technical solution

[0007] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions:

[0008] A new type of axial flow pump sealing structure includes a pump body and a sealing ring. A sealing ring is arranged at the joint of the pump casing of the pump body, an impeller is arranged inside the pump casing, and the impeller is connected to the pump shaft in a transmission manner. The sealing ring is annular and is provided with two upper and lower sealing contact surfaces for sealing. The inner and outer sides of the sealing ring are both provided with first deformation grooves, and sealing parts distributed at equal intervals are provided on the sealing contact surface. A second deformation groove is provided between two adjacent sealing parts, and an elastic support ring is provided in the sealing ring, and a second deformation cavity is opened at the sealing ring position in the elastic support ring.

[0009] Furthermore, the sealing contact surface is located at the first deformation notch and extends outward to form an annular lip plate that expands the sealing contact surface. The annular lip plate is provided with reinforcing ribs inside, and the reinforcing ribs are evenly spaced in the annular lip plate.

[0010] Furthermore, a first deformation cavity is opened inside the sealing portion and an elastic support member is arranged therein, and the elastic support member is arranged at a soft deformation portion formed by the first deformation cavity in the sealing portion;

[0011] The elastic support member is bent from the middle portion toward both sides, and the bent portions on both sides of the elastic support member extend to the second deformation notch portion, and the first deformation cavity and the second deformation notch are both annularly distributed on the sealing ring.

[0012] Furthermore, the elastic support rings are distributed at equal intervals in the sealing ring, and the second deformation cavities inside the elastic support rings are distributed in an annular shape on the sealing ring.

[0013] Furthermore, a first through hole is opened in the first deformation groove located on the outside of the sealing ring, and the first through hole is connected to the second deformation cavity, and a second through hole opened at the second deformation groove is arranged toward the outside of the sealing ring, and the second through hole is connected to the first deformation cavity.

[0014] (3) Beneficial effects

[0015] Compared with the prior art, the present invention provides a new axial flow pump sealing structure with the following beneficial effects:

[0016] The present invention provides a sealing contact surface with an annular lip plate at the contact portion between the sealing ring and the pump casing, and the annular lip plate formed on the sealing contact surface cooperates with the sealing portion to form multiple sealing contact surfaces on the sealing ring, thereby further improving the sealing performance, effectively reducing the failure rate, achieving the purpose of stable use, and facilitating use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention;

[0018] Figure 2 Schematic diagram of the structure of the sealing ring in the present invention;

[0019] Figure 3 This is a cross-sectional view of the sealing ring of Example 1 of the present invention;

[0020] Figure 4 This is a cross-sectional view of the sealing ring of Example 2 of the present invention.

[0021] In the figure: 1. pump body; 101. pump casing; 102. impeller; 103. pump shaft; 2. sealing ring; 201. first deformation notch; 202. sealing contact surface; 203. sealing portion; 2031. first deformation cavity; 2032. elastic support member; 204. second deformation notch; 205. reinforcing rib; 206. second deformation cavity; 207. elastic support ring; 208. first through hole; 209. second through hole. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0023] Example 1

[0024] like Figure 1 、 Figure 2 and Figure 3 As shown, an embodiment of the present invention proposes: a new axial flow pump sealing structure, including a pump body 1 and a sealing ring 2, a sealing ring 2 is arranged at the splicing part of the pump shell 101 of the pump body 1, an impeller 102 is arranged inside the pump shell 101, and the impeller 102 is transmission-connected to the pump shaft 103. The pump shaft 103 is used to be transmission-connected to the output shaft of the driving component, so that when the driving component outputs power, the impeller 102 is driven by the pump shaft 103 to rotate smoothly in the pump shell 101, thereby smoothly extracting the medium, the sealing ring 2 is annular and is provided with two upper and lower sealing contact surfaces 202 for sealing, and the inner and outer sides of the sealing ring 2 are A first deformation notch 201 is provided, and sealing portions 203 are distributed at equal intervals on the sealing contact surface 202. The sealing contact surface 202 and the sealing portions 203 are used to contact the pump housing 101, thereby forming a stable and effective sealing contact surface for each, and achieving a stable and effective sealing connection. A second deformation notch 204 is provided between two adjacent sealing portions 203 to provide an effective space for the sealing portions 203 to deform, so that the sealing portions 203 can deform smoothly when squeezed, and an elastic support ring 207 is provided in the sealing ring 2, and a second deformation cavity 206 is opened at the sealing ring 2 position in the elastic support ring 207;

[0025] When the various parts of the pump casing 101 are spliced and assembled, the sealing ring 2 of appropriate size is placed at the joint of the two pump casing 101 parts, and then the two parts are stably connected together using bolts. At the same time, the joint is also sealed and connected, so that it can be used stably.

[0026] like Figure 2 and Figure 3As shown, in some embodiments, the sealing contact surface 202 is located at the first deformation notch 201 and extends outward to form an annular lip plate that expands the sealing contact surface. Reinforcing ribs 205 are provided inside the annular lip plate. The reinforcing ribs 205 are evenly spaced in the annular lip plate to expand the effective contact area and improve the sealing effect. At the same time, the reinforcement ribs 205 are arranged to increase the strength of this part and extend its service life. After the sealing ring 2 is squeezed and deformed, the annular lip plate can be supported by the reinforcement ribs 205 to tightly contact the splicing part of the pump housing 101, thereby sealing the splicing part.

[0027] The annular lip plate formed on the sealing contact surface 202 cooperates with the sealing portion 203 to form multiple sealing contact surfaces on the sealing ring 2, thereby further improving the sealing performance, effectively reducing the failure rate, and achieving the purpose of stable use;

[0028] Among them, a first deformation cavity 2031 is opened inside the sealing part 203 and an elastic support member 2032 is arranged. The elastic support member 2032 is arranged at the soft deformation part formed by the first deformation cavity 2031 in the sealing part 203. The first deformation cavity 2031 is provided to ensure that when the sealing part 203 is pressed against the pump housing 101, the sealing part 203 can be smoothly deformed, thereby expanding the contact area between the sealing part 203 and the pump housing 101 and improving the sealing performance. At the same time, the elastic support member 2032 provides effective support for the deformed part of the sealing part 203, so that the deformed part of the sealing part 203 can be tightly pressed against the pump housing 101, thereby ensuring a stable sealing connection.

[0029] The elastic support member 2032 is bent from the middle portion toward both sides, and the bent portions on both sides of the elastic support member 2032 extend to the second deformation notch 204. The second deformation notch 204 provides effective space for the deformation of the sealing portion 203, so that when squeezed, it can smoothly generate appropriate deformation to ensure stable use. The first deformation cavity 2031 and the second deformation notch 204 are both distributed in an annular shape on the sealing ring 2.

[0030] Among them, the elastic support rings 207 are evenly spaced in the sealing ring 2, and the second deformation cavity 206 inside the elastic support ring 207 is distributed in a ring shape on the sealing ring 2. The elastic support ring 207 serves as the main supporting component of the sealing ring 2. When the sealing ring 2 is squeezed and deformed, it can ensure that the sealing contact surface 201 on the sealing ring 2 can tightly contact the pump housing 101, thereby achieving an effective sealing connection.

[0031] Example 2

[0032] like Figure 1 、 Figure 2 and Figure 4As shown, on the basis of Example 1, a first through hole 208 is opened in the first deformation groove 201 located on the outside of the sealing ring 2, and the first through hole 208 is connected with the second deformation cavity 206, and the second through hole 209 opened at the second deformation groove 204 is arranged toward the outside of the sealing ring 2, and the second through hole 209 is connected with the first deformation cavity 2031. The first through hole 208 and the second through hole 209 opened on the sealing ring 2 can smoothly discharge the gas in the second deformation cavity 206 and the first deformation cavity 2031 when the sealing ring 2 is squeezed and deformed, so that the sealing ring 2 and the sealing part 203 thereon can more conveniently produce appropriate deformation, ensuring that the sealing contact surface 201 and the deformed part of the sealing part 203 can smoothly contact the contact part of the pump housing 101, so as to achieve a stable and effective sealing connection.

[0033] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A novel axial flow pump sealing structure, comprising a pump body (1) and a sealing ring (2), wherein the sealing ring (2) is arranged at the splicing portion of the pump shell (101) of the pump body (1), and is characterized in that: The sealing ring (2) is annular and is provided with two upper and lower sealing contact surfaces (202) for sealing. The inner side and the outer side of the sealing ring (2) are both provided with first deformation notches (201), and the sealing contact surface (202) is provided with sealing portions (203) distributed at equal intervals. A second deformation notch (204) is provided between two adjacent sealing portions (203), and an elastic support ring (207) is provided inside the sealing ring (2), and a second deformation cavity (206) is provided at the portion of the sealing ring (2) inside the elastic support ring (207).

2. A new axial flow pump sealing structure according to claim 1, characterized in that: The sealing contact surface (202) is located at the first deformation notch (201) and extends outward to form an annular lip plate that expands the sealing contact surface. Reinforcement ribs (205) are provided inside the annular lip plate, and the reinforcement ribs (205) are distributed at equal intervals in the annular lip plate.

3. The novel axial flow pump sealing structure according to claim 1 is characterized in that: A first deformation cavity (2031) is provided inside the sealing portion (203) and an elastic support member (2032) is arranged therein; the elastic support member (2032) is arranged at a soft deformation portion formed by the first deformation cavity (2031) in the sealing portion (203).

4. A new axial flow pump sealing structure according to claim 3, characterized in that: The elastic support member (2032) is bent from a middle portion toward both sides, the bent portions on both sides of the elastic support member (2032) extend to the second deformation notch (204) portion, and the first deformation cavity (2031) and the second deformation notch (204) are both distributed in an annular shape on the sealing ring (2).

5. The novel axial flow pump sealing structure according to claim 1 is characterized in that: The elastic support rings (207) are distributed at equal intervals in the sealing ring (2), and the second deformation chambers (206) inside the elastic support rings (207) are distributed in an annular shape on the sealing ring (2).

6. The novel axial flow pump sealing structure according to claim 1 is characterized in that: A first through hole (208) is provided in the first deformation notch (201) located on the outside of the sealing ring (2), the first through hole (208) is communicated with the second deformation cavity (206), and a second through hole (209) provided at the second deformation notch (204) is arranged toward the outside of the sealing ring (2), the second through hole (209) is communicated with the first deformation cavity (2031).

7. The new axial flow pump sealing structure according to claim 1 is characterized in that: An impeller (102) is arranged inside the pump housing (101), and the impeller (102) is drivingly connected to the pump shaft (103).

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