Novel split type packing gland of multi-stage pump

Abstract

The utility model discloses a novel split type packing gland of a multistage pump, which comprises a split type packing gland assembly, the split type packing gland assembly is annular, and a mounting hole is formed in the middle of the split type packing gland assembly; the split type packing gland assembly comprises a packing gland upper part and a packing gland lower part, and the packing gland upper part and the packing gland lower part are both semicircular. Side lugs are connected to the outer side of the upper packing gland part and the outer side of the lower packing gland part, supporting lugs are symmetrically connected to the positions, at the two ends of the side lugs, of the upper packing gland part and the lower packing gland part, and connecting bolt holes are formed in the supporting lugs; the packing gland upper part and the packing gland lower part are assembled and connected through the connecting bolt holes; inner grooves are formed in the inner sides of the packing gland upper part and the packing gland lower part, and inner holes are further formed in the inner grooves; inclination angles are arranged on the sides, making contact with padding, of the upper padding gland part and the lower padding gland part.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of filler gland structure, specifically, a kind of new split type filler gland of multistage pump. BACKGROUND

[0002] As the core component of centrifugal pump sealing system, the purpose of filler gland is to make the filler in the sealing cavity fill the cavity by applying axial force to the filler gland, so that the filler is deformed to achieve the effect of sealing. However, long-term contact and friction between the filler and the filler shaft sleeve can easily cause sealing failure, and the filler needs to be replaced regularly. When replacing the filler, the filler gland needs to be removed, which makes the assembly complex, time-consuming and labor-intensive, and increases the cost. SUMMARY

[0003] The utility model aims at providing a new split type filler gland for a multistage pump. The split type filler gland design improves assembly efficiency. The split type filler gland assembly is designed with a filler contact surface inclination angle and a drop structure in the inner groove hole, which improves the sealing performance and service life of the split type filler gland assembly.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0005] In the technical scheme of the utility model, a split type filler gland assembly is provided, which is annular and has a mounting hole in the middle for assembly. The split type filler gland assembly includes an upper filler gland part and a lower filler gland part, both of which are semi-annular.

[0006] Further, in the technical scheme of the utility model, the outer side of the upper filler gland part and the lower filler gland part is connected with a side ear. At least two compression bolts holes are provided on the side ear of the upper filler gland part and the lower filler gland part. The side ear of the upper filler gland part and the lower filler gland part is symmetrically connected with a lug at both ends, and a connecting bolt hole is provided on the lug. The upper filler gland part and the lower filler gland part are assembled and connected through the connecting bolt hole. The inner side of the upper filler gland part and the lower filler gland part is provided with an inner groove, and an inner hole is further provided in the inner groove.

[0007] Further, in the technical scheme of the utility model, the split type filler gland assembly further includes a plurality of compression bolts, the number of compression bolts corresponds to the number of compression bolt holes, and the compression bolts are arranged in the compression bolt holes.

[0008] Further, in the technical scheme of the utility model, the split type packing gland assembly further comprises two connecting bolts, and the two connecting bolts are arranged on the connecting bolt holes on the two sides of the upper part and the lower part of the packing gland respectively.

[0009] Further, in the technical scheme of the utility model, the upper part and the lower part of the packing gland are provided with an inclination angle on the side in contact with the packing.

[0010] Further, in the technical scheme of the utility model, the inclination angle on the side in contact with the packing of the upper part and the lower part of the packing gland is 77°.

[0011] Further, in the technical scheme of the utility model, the upper part and the lower part of the packing gland are further provided with a mortise and tenon structure on the side of the position of the connecting bolt hole.

[0012] Effective gain: in summary, the utility model provides a novel split type packing gland for a multistage pump, on the one hand, the utility model is designed by the split type packing gland, the packing gland is designed into an axisymmetric figure, which is beneficial to interchangeability during installation and improves installation efficiency; meanwhile, the utility model is provided with a plurality of compression bolt holes on the packing gland, so that the packing is more uniform when compressed, improves the sealing property of the packing, in addition, the utility model is designed with an inclination angle of a packing contact surface in the split type packing gland assembly, which is beneficial to the close contact of the packing with the rotor part when the packing is stressed, improves the sealing property, meanwhile, the utility model is designed with a falling stop structure of an inner groove and an inner hole in the split type packing gland assembly, so that the split type packing gland assembly and the rotor part are in two-point contact, the two-point contact design can ensure the concentricity of the split type packing gland assembly and the rotor part, can also reduce the contact surface, reduce friction and prolong service life.

[0013] Other features and advantages of the utility model will be described in the subsequent description. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a structure diagram of a novel split type packing gland for a multistage pump according to the utility model Figure One ;

[0015] Figure 2 It is a structure diagram of a novel split type packing gland for a multistage pump according to the utility model Figure Two ;

[0016] Figure 3 It is an installation structure diagram of a novel split type packing gland for a multistage pump according to the utility model;

[0017] In the figure: A, split packing gland assembly; A1, mounting hole; A2, packing gland upper part; A3, packing gland lower part; A4, connecting bolt; A5, compression bolt; A01, side ear; A02, support ear; A03, connecting bolt hole; A04, inner groove; A05, inner hole; A06, compression bolt hole; A07, mortise structure; B, rotor part; C, packing. DETAILED DESCRIPTION

[0018] In order to make the purpose, features and advantages of the present application more obvious and easy to understand, the technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the following described embodiments are only a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0019] The technical solutions of the present application will be further described in combination with the drawings and specific embodiments.

[0020] In the description of the present application, it should be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional 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 devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0021] Based on the problems proposed in the above background art, the embodiments of the present application propose a new split packing gland for a multi-stage pump, Figure 1 and Figure 2 For the structure diagram of the new split packing gland for a multi-stage pump according to the present application, as Figure 1 shown, the present embodiment includes a split packing gland assembly A, which is annular and has a mounting hole A1 in the middle for assembly installation, i.e. for installing the split packing gland assembly A into the sealing system of a centrifugal pump.

[0022] Specifically, in the present embodiment, please continue to refer to Figure 1 and Figure 2, the split packing gland assembly A comprises a packing gland upper part A2 and a packing gland lower part A3, both of which are semi-annular, the outer side of the packing gland upper part A2 and the packing gland lower part A3 is connected with a side lug A01, and the packing gland upper part A2 and the packing gland lower part A3 are symmetrically connected with a lug A02 at both ends of the side lug A01, a connecting bolt hole A03 is formed on the lug A02, and the packing gland upper part A2 and the packing gland lower part A3 are assembled and connected through the connecting bolt hole A03, that is, assembled and connected into the split packing gland assembly A through the connecting bolt hole A03, Figure 3 It is an installation structure diagram of a novel split packing gland of a multistage pump according to the utility model, as shown in the description, Figure 3 When the split packing gland assembly A is assembled and installed, the connecting bolt hole A03 is bolted on the centrifugal pump rotor part B.

[0023] Specifically, in the embodiment, please continue to refer to Figure 1 and Figure 2 The inner side of the packing gland upper part A2 and the packing gland lower part A3 is provided with an inner groove A04, and the inner groove A04 is further provided with an inner hole A05 inside, and the inner hole A05 is provided at the thick wall of the inner groove A04 to remove and reduce the weight of the thick wall of the packing gland upper part A2 and the packing gland lower part A3, and the inner groove A04 and the inner hole A05 form a drop structure, which can reduce the structural pressure of the split packing gland assembly A, and please continue to refer to Figure 3 In the embodiment, according to the design of the inner groove A04 and the inner hole A05, the split packing gland assembly A and the rotor part B are designed as two-point contact, which can ensure the concentricity of the split packing gland assembly A and the rotor part B, reduce the contact area, reduce friction, and prolong the service life.

[0024] Specifically, in the embodiment, please continue to refer to Figure 3 The packing gland upper part A2 and the packing gland lower part A3 are provided with an inclination angle on the contact side with the packing C, wherein the inclination angle of the packing gland upper part A2 and the packing gland lower part A3 on the contact side with the packing C is 77°, and the design of the inclination angle is conducive to the close contact of the packing C with the rotor part B under long-term contact friction stress, that is, the packing C is close to the rotor part B under the guidance of the inclination angle on the contact side under friction stress, which can improve the sealing performance.

[0025] Specifically, in the embodiment, please continue to refer to Figure 1 and Figure 2, the packing gland upper part A2 and the packing gland lower part A3 are provided with at least two compression bolt holes A06 on the side ear A01, the compression bolt holes A06 are used for fixing the split packing gland assembly A on the centrifugal pump body, wherein, in the embodiment, please continue to refer to Figure 3 , the split packing gland assembly A further comprises a plurality of compression bolts A5, the number of the compression bolts A5 corresponds to the compression bolt holes A06, the compression bolts A5 are arranged in the compression bolt holes A06, and the plurality of compression bolt holes A06 can make the force more uniform when the packing is compressed, and the packing sealing performance can be improved.

[0026] , please continue to refer to Figure 1 and Figure 2 , the split packing gland assembly A further comprises two connecting bolts A4, the two connecting bolts A4 are arranged in the connecting bolt holes A03 on the two sides of the packing gland upper part A2 and the packing gland lower part A3, the split packing gland assembly A can be disassembled and assembled without disassembling the centrifugal pump bearing body through the mounting and dismounting of the connecting bolts A4, compared with the traditional packing gland structure, the packing is convenient to replace, the operation is simple, and the installation efficiency and the maintenance efficiency are improved.

[0027] , please continue to refer to Figure 1 and Figure 2 , the packing gland upper part A2 and the packing gland lower part A3 are further provided with a mortise and tenon structure A07 at one side of the connecting bolt hole A02 position, and the mortise and tenon structure A07 is beneficial to the assembly and installation of the packing gland upper part A2 and the packing gland lower part A3.

[0028] The basic principle, main characteristics and advantages of the split packing gland assembly are shown and described above. It should be understood by those skilled in the art that the split packing gland assembly is not limited by the above embodiments, the above embodiments and the description in the specification are only preferred examples of the split packing gland assembly, and are not used to limit the split packing gland assembly, various changes and improvements can be made to the split packing gland assembly without departing from the spirit and scope of the split packing gland assembly, and these changes and improvements all fall within the scope of the claimed split packing gland assembly. The scope of protection of the split packing gland assembly is defined by the appended claims and their equivalents.

Claims

1. A novel split-type packing gland for a multi-stage pump, comprising a split-type packing gland assembly (A), characterized in that: The split filler gland assembly (A) is annular and has a mounting hole (A1) in the middle for assembly installation; The split packing gland assembly (A) includes an upper packing gland component (A2) and a lower packing gland component (A3), both of which are semi-circular. The upper part (A2) and the lower part (A3) of the packing gland are both connected to side ears (A01) on their outer sides. The upper part (A2) and the lower part (A3) of the packing gland are symmetrically connected to the two ends of the side ears (A01) with support ears (A02). Each support ear (A02) is provided with a connecting bolt hole (A03). The upper part (A2) and the lower part (A3) of the packing gland are assembled and connected through the connecting bolt holes (A03). The inner sides of both the upper part (A2) and the lower part (A3) of the packing gland are provided with inner grooves (A04), and the inner grooves (A04) are further provided with inner holes (A05). Both the upper part (A2) and the lower part (A3) of the packing gland have an inclination angle on the contact side with the packing.

2. The novel split-type packing gland for a multi-stage pump according to claim 1, characterized in that, Both the upper part (A2) and the lower part (A3) of the packing gland have at least two clamping bolt holes (A06) on the side lug (A01).

3. The novel split-type packing gland for a multi-stage pump according to claim 1, characterized in that, The split packing gland assembly (A) further includes two connecting bolts (A4), which are respectively disposed in the connecting bolt holes (A03) on both sides of the upper packing gland component (A2) and the lower packing gland component (A3).

4. The novel split-type packing gland for a multi-stage pump according to claim 1, characterized in that, The angle of inclination of the upper packing gland component (A2) and the lower packing gland component (A3) on the contact side with the packing is 77°.

5. A novel split-type packing gland for a multi-stage pump according to claim 1, characterized in that, The upper part (A2) and the lower part (A3) of the packing gland are also provided with a tenon and mortise structure (A07) on one side of the location of the connecting bolt hole (A03).

6. A novel split-type packing gland for a multi-stage pump according to claim 2, characterized in that, The split packing gland assembly (A) further includes a plurality of clamping bolts (A5), the number of which corresponds to the number of clamping bolt holes (A06), and the clamping bolts (A5) are disposed in the clamping bolt holes (A06).

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