Sealing structure for clear water centrifugal pump

Abstract

The utility model discloses a sealing structure for a clear water centrifugal pump, and relates to the technical field of centrifugal pump sealing structures. The stuffing box comprises a stuffing box body and further comprises a pump shaft penetrating through the interior of the stuffing box body, and a shaft sleeve is arranged in the stuffing box body outside the pump shaft. The wear-resistant component is arranged on the outer side of the shaft sleeve, so that the first sliding sleeve and the second sliding sleeve are arranged among the outer side of the shaft sleeve, the sealing filler and the liquid sealing ring when the structure is assembled; meanwhile, the first isolation stabilizing piece and the second isolation stabilizing piece are embedded between the sealing filler and the liquid sealing ring to avoid the situation that the sealing filler and the liquid sealing ring deform and age too fast to affect the structural sealing effect, the supporting ring is used for supporting and stabilizing the liquid sealing ring, and the contact face between the sealing filler and the shaft sleeve is reduced through the first sliding sleeve and the second sliding sleeve, so that friction is reduced; and when the cooling liquid enters, a liquid film can be formed between the sliding sleeve and the shaft sleeve, so that the friction can be further reduced while the sealing is ensured, and the motor energy loss caused by friction force is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to centrifugal pump sealing structure technical field, especially relate to a sealing structure for clean water centrifugal pump. BACKGROUND

[0002] The clean water centrifugal pump is a kind of mechanical equipment specially used for conveying liquid without solid particles or impurities such as fiber or other non-corrosive liquid, and the centrifugal pump sealing structure is a structure for sealing the place where the pump shaft penetrates out of the pump shell by using reliable sealing mode, wherein the packing seal is a more common sealing mode in the centrifugal pump.

[0003] As the utility model discloses a kind of coal mine multi-stage clean water centrifugal pump inner pressure type sealing structure disclosed in authorized announcement No.CN217380991U, including packing box, pump shaft, packing shaft sleeve, packing gland, packing gap is provided between the packing shaft sleeve and packing box, the left side of packing is attached with buffer spacer, the left side of buffer spacer is evenly provided with extrusion column, the left end of packing gap is attached with fixed ring, the left end of extrusion column is fixedly connected with limit block, the right side of fixed ring is evenly provided with extrusion slot, reset spring is transversely provided in the inner cavity of extrusion slot.The coal mine multi-stage clean water centrifugal pump inner pressure type sealing structure, the mutual cooperation of buffer spacer, extrusion column and reset spring set can avoid the external adjustment close to packing gland, uses built-in reset spring and packing gland to be bidirectional pre-tightening to packing, so that packing is evenly distributed along axial radial force, and the structural characteristics and sealing principle of packing seal are optimized.However, the technical scheme has the technical problems that the friction between shaft and shaft sleeve and sealing packing is large when pump machine is running, the service life of packing and pump shaft is easily reduced, and motor power loss is easily caused, and the friction between sealing packing and pump shaft cannot be reduced while ensuring sealing effect. UTILITY MODEL CONTENTS

[0004] In view of the above-mentioned shortcomings of the prior art, the utility model provides a sealing structure for clean water centrifugal pump, which can effectively solve the problems of the prior art.

[0005] To solve the above technical problems, the utility model is realized by the following technical solutions:

[0006] The utility model discloses a sealing structure for clear water centrifugal pump, including the packing body, still include: the inside of packing body is penetrated with pump shaft, the packing body of pump shaft outside is provided with the shaft sleeve, the one side of packing body is provided with gland, the both ends of one side of packing body and the both ends of one side of gland are equipped with fastening bolt, the shaft sleeve of packing body inside one side is nested with bottom bush, the outside of shaft sleeve in the packing body is nested with sealing packing, the sealing packing between the outside of shaft sleeve is provided with the seal liquid ring, the one side of packing body top is inserted with the liquid injection port, the one side of packing body bottom is inserted with the liquid discharge port, the inside between one side of the outside of shaft sleeve and sealing packing is provided with first sliding sleeve, the inside between sealing packing and seal liquid ring of the middle position of the outside of shaft sleeve is provided with second sliding sleeve, the both sides of second sliding sleeve outside is provided with first isolation stabilizing piece, the middle position of second sliding sleeve outside is provided with the support ring, the middle position of first sliding sleeve outside is provided with second isolation stabilizing piece, the one side of packing body and the one side of gland are provided with sealing stability subassembly.

[0007] Further, the first isolation stabilizing piece and the second isolation stabilizing piece are annular, the first isolation stabilizing piece is symmetrically arranged outside the second sliding sleeve, and the first isolation stabilizing piece is embedded between the sealing packing and the seal liquid ring.

[0008] Further, the second isolation stabilizing piece is embedded between the sealing packing, and the support ring is embedded inside the seal liquid ring.

[0009] Further, the one side of the gland is inserted into the inside of the packing body, the sealing packing is annular, and the liquid injection port and the liquid discharge port are communicated with the inside of the packing body.

[0010] Further, the sealing stability subassembly comprises a limiting rod, the limiting rod is arranged at the position close to the edge of the one side of the gland, a positioning slot is arranged at the position close to the edge of the one side of the packing body, and a rubber pad is arranged between the one side of the packing body and the one side of the gland.

[0011] Further, the rubber pad is annular, the limiting rods are symmetrically arranged at the one side of the gland, the positioning slots are symmetrically arranged at the one side of the packing body, and the limiting rods are inserted into the inside of the positioning slots.

[0012] The utility model has the following beneficial effects:

[0013] 1. The utility model discloses a wear -resisting assembly is provided with on the outside of the shaft sleeve, installs the first sliding sleeve and the second sliding sleeve between the seal packing and the seal liquid ring on the outside of the shaft sleeve and the seal packing and the seal liquid ring between the seal packing and the seal liquid ring and the seal packing between the first isolation stabilizing piece and the second isolation stabilizing piece are embedded and connected to avoid the both deformation and aging too fast influence structural sealing effect, and the support ring is used to support the seal liquid ring and prevent deformation, the contact surface between the seal packing and the shaft sleeve is reduced through the first sliding sleeve and the second sliding sleeve, the friction is reduced, and the liquid film can be formed between the sliding sleeve and the shaft sleeve when the cooling liquid enters, the friction can be further reduced while ensuring the sealing, and the motor energy loss caused by the friction is reduced.

[0014] 2. The utility model discloses a sealing stabilizing assembly is arranged between the one side of the packing gland and the one side of the gland, when installing the gland to one side of the packing gland, the limiting insertion rod is inserted into the positioning insertion slot of the corresponding position of one side of the packing gland, thereby positioning and installing the gland are convenient, and the rubber pad is used to further seal the connecting place of the packing gland and the gland, and the vibration of the pump when running is buffered to the gland, so that the probability that the gland is loosened due to the vibration when the pump runs subsequently is reduced. DRAWINGS

[0015] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will be simply introduced to the drawings needed to be used in the embodiment description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for the ordinary skilled person in the art, other drawings can be obtained according to these drawings without creating labor.

[0016] Figure 1 It is the three-dimensional schematic diagram of the utility model;

[0017] Figure 2 It is the overhead sectional structure schematic diagram of the utility model;

[0018] Figure 3 It is the Figure 2 Enlarged structure schematic diagram of A place in the utility model;

[0019] Figure 4 It is the Figure 2 Enlarged structure schematic diagram of B place in the utility model.

[0020] In the drawings, the component list represented by each sign is as follows:

[0021] 1, packing body; 2, liquid injection port; 3, gland; 4, pump shaft; 5, fastening bolt; 6, liquid discharge port; 7, limiting rod; 8, sealing packing; 9, liquid sealing ring; 10, bottom bushing; 11, shaft sleeve; 12, supporting ring; 13, first isolation stabilizing piece; 14, second isolation stabilizing piece; 15, first sliding sleeve; 16, second sliding sleeve; 17, rubber pad; 18, positioning slot. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model.

[0023] Please refer to Figures 1-4 The utility model discloses a sealing structure for clean water centrifugal pump, including packing body 1, still include: the inside of packing body 1 is penetrated with pump shaft 4, and the packing body 1 of pump shaft 4 outside is provided with shaft sleeve 11, and one side of packing body 1 is provided with gland 3, and the inside of packing body 1 is inserted into the inside of packing body 1 on one side of gland 3, and the both ends of one side of packing body 1 and the both ends of one side of gland 3 are provided with fastening bolt 5, and the shaft sleeve 11 of one side in the inside of packing body 1 is nested with bottom bushing 10, and the shaft sleeve 11 of the inside of packing body 1 is nested with the sealing packing 8 of annular, and the sealing packing 8 of the outside of shaft sleeve 11 is provided with liquid sealing ring 9, and the position of pump shaft 4 is sealed with sealing packing 8 and liquid sealing ring 9 to reduce liquid leakage and bear abrasion, and sealing packing 8 and liquid sealing ring 9 are limited and stabilized by the gland 3 of fastening bolt 5 and packing body 1 fixed connection, and one side of the top of packing body 1 is inserted with liquid injection port 2, and one side of the bottom of packing body 1 is inserted with liquid discharge port 6, and liquid injection port 2 and liquid discharge port 6 are connected with the inside of packing body 1, and the sealing structure is cooled and cooled by the circulation of liquid injection port 2 and liquid discharge port 6.

[0024] As a further embodiment of the present embodiment, as Figure 1 , Figure 2 and Figure 3As shown, the first sliding sleeve 15 is arranged between the outer side of the shaft sleeve 11 and the inner side of the sealing packing 8, the second sliding sleeve 16 is arranged between the middle position of the outer side of the shaft sleeve 11 and the inner side of the sealing packing 8 and the liquid ring 9, the first isolation stabilizing piece 13 in the shape of a ring is arranged on the outer side of the second sliding sleeve 16, the first isolation stabilizing piece 13 is symmetrically arranged on the outer side of the second sliding sleeve 16, and the first isolation stabilizing piece 13 is embedded between the sealing packing 8 and the liquid ring 9, the second isolation stabilizing piece 14 in the shape of a ring is arranged at the middle position of the outer side of the first sliding sleeve 15, and the second isolation stabilizing piece 14 is embedded between the sealing packing 8, the first isolation stabilizing piece 13 and the second isolation stabilizing piece 14 are embedded between the sealing packing 8 and the liquid ring 9 and between the sealing packing 8 to avoid the too fast deformation and aging of the sealing packing 8 and the liquid ring 9 to affect the structure sealing effect, the supporting ring 12 is arranged at the middle position of the outer side of the second sliding sleeve 16, the supporting ring 12 is embedded in the inner side of the liquid ring 9, and the liquid ring 9 is supported and stabilized by the supporting ring 12 to prevent deformation, the contact surface between the sealing packing 8 and the shaft sleeve 11 is reduced by the first sliding sleeve 15 and the second sliding sleeve 16, the friction is reduced, and when the cooling liquid enters, a liquid film can also be formed between the sliding sleeve and the shaft sleeve 11 to further reduce the friction and reduce the motor energy loss caused by the friction;

[0025] The sealing packing 8 and the liquid ring 9 are arranged between the outer side of the shaft sleeve 11 and the inner side of the packing body 1, the first sliding sleeve 15 and the second sliding sleeve 16 are arranged between the outer side of the shaft sleeve 11 and the sealing packing 8 and the liquid ring 9, the first isolation stabilizing piece 13 and the second isolation stabilizing piece 14 are embedded between the sealing packing 8 and the liquid ring 9 and between the sealing packing 8 to avoid the too fast deformation and aging of the sealing packing 8 and the liquid ring 9 to affect the sealing, the liquid ring 9 is supported and stabilized by the supporting ring 12 to prevent deformation, the contact surface between the sealing packing 8 and the shaft sleeve 11 is reduced by the first sliding sleeve 15 and the second sliding sleeve 16, and when the cooling liquid enters, a liquid film can also be formed between the sliding sleeve and the shaft sleeve 11 to reduce the friction;

[0026] As a further embodiment of the present embodiment, as Figure 1 、 Figure 2 and Figure 4As shown, a sealing stabilizing assembly is arranged between one side of the packing gland 1 and one side of the gland 3, and the sealing stabilizing assembly comprises a limiting rod 7 arranged at a position close to the edge of one side of the gland 3, and the limiting rod 7 is symmetrically arranged at one side of the gland 3. A positioning slot 18 is arranged at a position close to the edge of one side of the packing gland 1, and the positioning slot 18 is symmetrically arranged at one side of the packing gland 1. The limiting rod 7 is inserted into the positioning slot 18, so that the gland 3 can be conveniently positioned and installed. An annular rubber pad 17 is arranged between one side of the packing gland 1 and one side of the gland 3. The rubber pad 17 is used to further seal the connection between the packing gland 1 and the gland 3, and to buffer the vibration transmitted to the gland 3 during the operation of the pump, so as to reduce the probability that the vibration generated during the subsequent operation of the pump causes the gland 3 to loosen.

[0027] When the gland 3 is installed on one side of the packing gland 1, the limiting rod 7 is inserted into the positioning slot 18 arranged at a corresponding position on one side of the packing gland 1, so that the gland 3 can be conveniently positioned and installed. The rubber pad 17 is used to further seal the connection between the packing gland 1 and the gland 3, and to buffer the vibration transmitted to the gland 3 during the operation of the pump.

[0028] Working principle: When the sealing packing 8 and the liquid ring 9 are arranged between the outer side of the shaft sleeve 11 and the inner side of the packing gland 1, the first sliding sleeve 15 and the second sliding sleeve 16 are installed between the outer side of the shaft sleeve 11 and the sealing packing 8 and the liquid ring 9. The first isolation stabilizing sheet 13 and the second isolation stabilizing sheet 14 are embedded between the sealing packing 8 and the liquid ring 9 and between the sealing packing 8 to prevent the two from deforming and aging too quickly and affecting the sealing. The support ring 12 is used to support and stabilize the liquid ring 9 to prevent deformation. After the sealing packing 8 and the liquid ring 9 are installed in the packing gland 1, the gland 3 fixedly connected to the packing gland 1 by the fastening bolt 5 is used to limit and stabilize the sealing packing 8 and the liquid ring 9. The limiting rod 7 is inserted into the positioning slot 18 arranged at a corresponding position on one side of the packing gland 1, so that the gland 3 can be conveniently positioned and installed, and the stability of the installation of the gland 3 is further ensured. The rubber pad 17 is used to further seal the connection between the packing gland 1 and the gland 3. During the operation of the centrifugal pump, the sealing packing 8 and the liquid ring 9 seal the position of the pump shaft 4 penetrating the pump shell, so as to reduce liquid leakage and withstand wear. The first sliding sleeve 15 and the second sliding sleeve 16 reduce the contact surface between the sealing packing 8 and the shaft sleeve 11. The rubber pad 17 buffers the vibration transmitted to the gland 3 during the operation of the pump, so as to reduce the probability that the vibration generated during the subsequent operation of the pump causes the gland 3 to loosen. The cooling liquid is circulated into and out of the cooling liquid inlet 2 and the cooling liquid outlet 6 to cool the sealing structure. When the cooling liquid enters, a liquid film is formed between the sliding sleeve and the shaft sleeve 11 to reduce friction, so that the clean water centrifugal pump can operate more continuously and stably.

[0029] The above are only preferred embodiments of the present application, and do not limit the present application, any modification to the technical solutions recorded in the foregoing embodiments, equivalent replacement of part of the technical features, any modification, equivalent replacement, improvement made, all belong to the protection scope of the present application.

Claims

1. A sealing structure for a clean water centrifugal pump, comprising a stuffing box (1), characterized in that: Also includes: The stuffing box body (1) has a pump shaft (4) passing through it, and a shaft sleeve (11) is provided in the stuffing box body (1) outside the pump shaft (4), and a pressure cover (3) is provided on one side of the stuffing box body (1), and fastening bolts (5) are provided between the two ends of one side of the stuffing box body (1) and the two ends of one side of the pressure cover (3), and a bottom bushing (10) is nested outside the shaft sleeve (11) on one side of the stuffing box body (1), and a sealing packing (8) is nested outside the shaft sleeve (11) inside the stuffing box body (1), and a sealing ring (9) is provided between the sealing packing (8) on the outside of the shaft sleeve (11), and a liquid injection port (2) is inserted on one side of the top of the stuffing box body (1). A drain port (6) is inserted on one side of the bottom of the body (1), a first sleeve (15) is provided between one side of the outside of the sleeve (11) and the inner side of the sealing filler (8), a second sleeve (16) is provided between the middle position of the outside of the sleeve (11) and the inner side of the sealing filler (8) and the liquid sealing ring (9), first isolation stabilizing plates (13) are provided on both sides of the outside of the second sleeve (16), a support ring (12) is provided at the middle position of the outside of the second sleeve (16), a second isolation stabilizing plate (14) is provided at the middle position of the outside of the first sleeve (15), and a sealing stabilizing component is provided between one side of the stuffing box body (1) and one side of the pressure cover (3).

2. A sealing structure for a clean water centrifugal pump according to claim 1, characterized in that: The first isolation stabilizing plate (13) and the second isolation stabilizing plate (14) are annular, the first isolation stabilizing plate (13) is symmetrically arranged outside the second sliding sleeve (16), and the first isolation stabilizing plate (13) is embedded between the sealing filler (8) and the liquid sealing ring (9).

3. The sealing structure for a clean water centrifugal pump according to claim 1, characterized in that: The second isolation stabilizing sheet (14) is embedded between the sealing fillers (8), and the supporting ring (12) is embedded into the inner side of the sealing liquid ring (9).

4. The sealing structure for a clean water centrifugal pump according to claim 1, characterized in that: One side of the gland (3) is inserted into the inner side of the stuffing box body (1), the sealing filler (8) is annular, and the liquid injection port (2) and the liquid discharge port (6) are connected to the interior of the stuffing box body (1).

5. The sealing structure for a clean water centrifugal pump according to claim 1, characterized in that: The sealing stabilization assembly includes a limiting rod (7), the limiting rod (7) is arranged at a position close to the edge of one side of the gland (3), a positioning slot (18) is arranged at a position close to the edge of one side of the stuffing box body (1), and a rubber pad (17) is arranged between one side of the stuffing box body (1) and one side of the gland (3).

6. The sealing structure for a clean water centrifugal pump according to claim 5, characterized in that: The rubber pad (17) is annular, the limiting rod (7) is symmetrically arranged on one side of the gland (3), the positioning slot (18) is symmetrically arranged on one side of the stuffing box body (1), and the limiting rod (7) is inserted into the interior of the positioning slot (18).

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