Sealing ring for pump

Abstract

The utility model discloses a sealing ring for a pump, which relates to the technical field of sealing rings and comprises a pump shell and a sealing ring main body, an inner ring of the sealing ring main body is provided with an inner water passing groove, one end of the sealing ring main body is provided with an end face water passing groove, one side of the top of the sealing ring main body penetrates through a fixing block, and two sides of the bottom of the fixing block are provided with clamping jaws. Through the arrangement of the sealing ring main bodies, the radial clearance and the axial clearance between the two sealing ring main bodies and the front opening and the rear opening of the impeller are both ten-twenty threads, under the clearance condition, if a certain bearing of a pump or a motor breaks down in the operation process of a pump set, and the radial or axial displacement of a motor shaft is abnormal, the motor shaft is not damaged. The sealing ring main body can play a role in radial and axial auxiliary supporting, the backflow loss in the pump is greatly reduced, and the efficiency of the pump is improved; after the collision and abrasion phenomenon occurs, the impeller can still operate stably for a period of time, and an auxiliary supporting structure of other parts in the pump cannot be further damaged before shutdown maintenance.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing rings, in particular to a sealing ring for a pump. Background Art

[0002] A pump is a very common machine that is mainly used to lift, transport or compress fluids. According to the principle of the pump, it can be divided into centrifugal, axial flow, reciprocating, plunger, pneumatic diaphragm, etc. Among them, the centrifugal pump mainly generates centrifugal force through the high-speed rotating impeller, and the centrifugal force transports the fluid. In order to avoid fluid leakage when the pump is working, a sealing structure is usually set.

[0003] Conventional pumps, particularly those with cantilever rotors, are susceptible to rotor bearing failure or abnormally increased radial forces on the rotor during operation. This can cause the impeller, mechanical seal, and other components to rub against the pump casing, leading to abnormal vibration and, in severe cases, even damage. Therefore, it is necessary to design an auxiliary support structure that can maintain stable operation of the pump rotor for a period of time under these conditions, preventing further damage to other internal components before shutting down for maintenance. Utility Model Content

[0004] Based on this, the purpose of the present invention is to provide a sealing ring for a pump to solve the technical problems mentioned in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a sealing ring for a pump, comprising a pump casing and a sealing ring body, the inner ring of the sealing ring body being provided with an inner water groove, one end of the sealing ring body being provided with an end face water groove, a fixing block passing through one side of the top of the sealing ring body, and claws being provided on both sides of the bottom of the fixing block.

[0006] By adopting the above technical solution, the radial clearance and axial clearance between the two sealing ring bodies and the front and rear openings of the impeller are both ten to twenty threads. Under this clearance condition, if a bearing of the pump or motor fails during the operation of the pump unit, and the radial or axial displacement of the motor shaft is abnormal, the sealing ring body can play a radial and axial auxiliary support role, and greatly reduce the backflow loss inside the pump, thereby improving the efficiency of the pump; through the internal water groove and the end face water groove, it is ensured that there is sufficient water for lubrication and cooling when the impeller and the sealing ring are in contact and relatively rotated, which ensures that the impeller can run smoothly before maintenance and does not damage the impeller. and other components such as mechanical seals, and the sealing ring is made of graphite or PEEK, which has good wear resistance and lubrication performance, ensuring its service life; a hole is opened on the sealing ring body, and then the fixing block is inserted into the hole. After the fixing block enters the sealing ring body, the claws penetrate the sealing ring body to limit it, so that the fixing block is difficult to fall off from the sealing ring body. Later, during assembly, the bolts can be passed through the fixing block to connect it to the pump casing or pump cover to complete the installation operation of the sealing ring body. When the sealing ring body needs to be disassembled, the sealing ring body can be removed from the pump casing or pump cover by simply removing the bolts.

[0007] Furthermore, the cross section of the clamping claw is circular, and the longitudinal section of the clamping claw is triangular.

[0008] By adopting the above technical solution, the claw has a triangular longitudinal section, which is convenient for penetrating into the sealing ring body to limit the fixed block. The circular cross section of the claw can increase the area of the claw penetrating into the sealing ring body and improve stability.

[0009] Furthermore, a plurality of the fixing blocks are provided, and the plurality of fixing blocks are distributed in a ring array, and the cross-sections of the plurality of fixing blocks are all in the shape of an "I".

[0010] By adopting the above technical solution, the cross-section of the fixing blocks is I-shaped and can support the sealing ring body, thereby reducing the occurrence of the fixing blocks falling off, and the provision of multiple fixing blocks increases the number of connection points between the sealing ring body and the pump casing or pump cover.

[0011] Furthermore, the clamping jaws are provided in multiple groups, two in a group, and the two clamping jaws in each group are provided in a mirror image.

[0012] By adopting the above technical solution, after the fixing block enters the sealing ring body, the claws penetrate the sealing ring body to limit the fixing block, thereby making it difficult for the fixing block to fall off from the sealing ring body.

[0013] Furthermore, a plurality of the inner water troughs and the end surface water troughs are provided, and the plurality of inner water troughs and the end surface water troughs are distributed in a circular array, and the plurality of inner water troughs and the plurality of end surface water troughs are staggered.

[0014] By adopting the above technical solution and increasing the number of the inner water grooves and the end surface water grooves, the periphery of the impeller can be lubricated and cooled by water.

[0015] Furthermore, the sealing ring body is made of graphite or PEEK.

[0016] By adopting the above technical solution, the sealing ring is made of graphite or PEEK material, which has good wear resistance and lubrication performance, thereby ensuring its service life.

[0017] Furthermore, an organic seal passes through the top of the pump casing, and a motor shaft passes through the top of the mechanical seal, an impeller is sleeved on the outside of the motor shaft, an outlet is provided on one side of the pump casing, a pump cover is connected to the bottom of the pump casing, and an inlet is provided at the bottom of the pump cover, two sealing ring bodies are provided, and the two sealing ring bodies are respectively connected to the inside of the pump casing and the pump cover.

[0018] By adopting the above technical solution, during operation, the fluid enters through the inlet, and at the same time the motor shaft drives the impeller to rotate, and the centrifugal force of the rotation of the impeller throws the fluid out and discharges it from the outlet, thereby transporting the fluid.

[0019] Furthermore, the radial clearance and axial clearance between the sealing ring body and the impeller are both .mm to .mm.

[0020] By adopting the above technical solution, under the clearance condition, if a bearing of the pump or motor fails during the operation of the pump group, and the radial or axial displacement of the motor shaft is abnormal, the sealing ring body can play a radial and axial auxiliary support role, and greatly reduce the backflow loss inside the pump, thereby improving the efficiency of the pump.

[0021] In summary, the present invention has the following beneficial effects:

[0022] 1. The utility model provides a sealing ring body, and the radial and axial clearances between the two sealing ring bodies and the front and rear ports of the impeller are both ten to twenty threads. Under this clearance condition, if a bearing of the pump or motor fails during the operation of the pump unit, and the radial or axial displacement of the motor shaft is abnormal, the sealing ring body can play a radial and axial auxiliary support role, and greatly reduce the backflow loss inside the pump, thereby improving the efficiency of the pump; after the collision and wear phenomenon occurs, the impeller can still run stably for a period of time, and the auxiliary support structure of other components inside the pump will not be further damaged before the pump is shut down for maintenance;

[0023] 2. The utility model provides an inner water groove and an end surface water groove to ensure that the impeller and the sealing ring have sufficient water for lubrication and cooling when they are in contact and rotate relative to each other, thereby ensuring that the impeller can run smoothly before maintenance and will not damage the impeller and other components such as the mechanical seal. The sealing ring is made of graphite or PEEK, which has good wear resistance and lubrication properties, ensuring its service life; reducing structural wear and extending service life;

[0024] 3. The utility model uses a fixing block and a claw. During the production process of the sealing ring body, a hole is opened on the sealing ring body, and then the fixing block is inserted into the hole. After the fixing block enters the sealing ring body, the claw penetrates the sealing ring body to limit the position, so that the fixing block is difficult to fall off from the sealing ring body. Later, during assembly, the bolts can be passed through the fixing block to connect to the pump casing or pump cover to complete the installation operation of the sealing ring body. When the sealing ring body needs to be disassembled, the bolts can be removed to remove the sealing ring body from the pump casing or pump cover; it is convenient to disassemble and assemble, and the connection is stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the cross-sectional structure of the utility model;

[0026] Figure 2 This is a schematic diagram of the main structure of the sealing ring of the utility model;

[0027] Figure 3 This is a bottom view of the structure of the sealing ring body of the present invention;

[0028] Figure 4 This is a schematic diagram of the fixed block structure of the present utility model.

[0029] In the figure: 1. Pump casing; 2. Pump cover; 3. Inlet; 4. Outlet; 5. Motor shaft; 6. Mechanical seal; 7. Impeller; 8. Sealing ring body; 9. Internal water groove; 10. End water groove; 11. Fixing block; 12. Clamping claw. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0031] The following describes an embodiment of the present invention based on its overall structure.

[0032] Example 1:

[0033] A sealing ring for a pump, such as Figure 2-Figure 4As shown, it includes a pump casing 1 and a sealing ring body 8. The radial clearance and axial clearance between the sealing ring body 8 and the impeller 7 are both 0.1mm to 0.2mm. Under this clearance condition, if a bearing of the pump or motor fails during the operation of the pump group, and the radial or axial displacement of the motor shaft 5 is abnormal, the sealing ring body 8 can play a radial and axial auxiliary support role, and greatly reduce the backflow loss inside the pump, thereby improving the efficiency of the pump; the sealing ring body 8 is made of graphite or PEEK material, which has good wear resistance and lubrication performance, ensuring its service life; the inner ring of the sealing ring body 8 is provided with an inner water groove 9, and an end face water groove 10 is provided at one end of the sealing ring body 8, and the inner water groove 9 and the end face water groove 10 ensure that the impeller 7 and the sealing ring body 8 are in contact and rotate relative to each other There is enough water for lubrication and cooling, which ensures that the impeller 7 can run smoothly before maintenance, and does not damage the impeller 7 and other components such as the mechanical seal; a fixing block 11 is passed through one side of the top of the sealing ring main body 8, and a plurality of fixing blocks 11 are provided. The plurality of fixing blocks 11 are distributed in an annular array, and the cross-sections of the plurality of fixing blocks 11 are all in the shape of an "I". The bolts can be passed through the fixing blocks 11 to be connected to the pump casing 1 or the pump cover 2 to complete the installation operation of the sealing ring main body 8; claws 12 are provided on both sides of the bottom of the fixing block 11, and the claws 12 are provided in multiple groups, two in a group, and the two claws 12 in each group are mirror-set, the cross-section of the claws 12 is circular, and the longitudinal section of the claws 12 is triangular. The claws 12 penetrate into the sealing ring main body 8 for limiting, so that the fixing block 11 is difficult to fall off from the sealing ring main body 8.

[0034] See Figure 1 In the above embodiment, an organic seal 6 is passed through the top of the pump casing 1, a motor shaft 5 is passed through the top of the mechanical seal 6, an impeller 7 is sleeved on the outside of the motor shaft 5, an outlet 4 is provided on one side of the pump casing 1, a pump cover 2 is connected to the bottom of the pump casing 1, and an inlet 3 is provided at the bottom of the pump cover 2, which can transport fluid by centrifugal force; two sealing ring bodies 8 are provided, and the two sealing ring bodies 8 are respectively connected to the inside of the pump casing 1 and the pump cover 2, which can play a role of radial and axial auxiliary support.

[0035] Example 2:

[0036] On the basis of the above embodiment 1, the following settings are now adopted by adding.

[0037] See Figure 2 and Figure 3 In the above embodiment, multiple inner water grooves 9 and end surface water grooves 10 are provided, and the multiple inner water grooves 9 and end surface water grooves 10 are distributed in a ring array. The multiple inner water grooves 9 and the multiple end surface water grooves 10 are staggered. By increasing the number of inner water grooves 9 and end surface water grooves 10, the periphery of the impeller 7 can be lubricated and cooled by water.

[0038] The implementation principle of the present utility model is as follows: first, during the production process of the sealing ring main body 8, a hole is drilled on the sealing ring main body 8 by a punching device, or a hole position is reserved during the integral molding process. Then, the staff inserts the fixing block 11 into the hole. After the fixing block 11 enters the sealing ring main body 8, the claws 12 penetrate the sealing ring main body 8 to limit the position, thereby making it difficult for the fixing block 11 to fall off from the sealing ring main body 8. When the sealing ring main body 8 is processed and installed in the pump housing 1 or the pump cover 2, the bolts can be passed through the fixing block 11 to connect it to the pump housing 1 or the pump cover 2, thereby completing the installation operation of the sealing ring main body 8.

[0039] During the operation of the pump, through the setting of the two sealing ring bodies 8, and because the radial clearance and axial clearance between the two sealing ring bodies 8 and the front and rear openings of the impeller 7 are both ten to twenty threads, under this clearance condition, if a bearing of the pump or motor fails during the operation of the pump group, and the radial or axial displacement of the motor shaft 5 is abnormal, the sealing ring body 8 can play a radial and axial auxiliary support role, and greatly reduce the reflux loss inside the pump, thereby improving the efficiency of the pump. At the same time, through the internal water groove 9 and the end water groove 10, it is ensured that there is sufficient water for lubrication and cooling when the impeller 7 contacts and rotates relative to the sealing ring body 8, thereby ensuring that the impeller 7 can run smoothly before maintenance without damaging the impeller 7 and other components such as the mechanical seal. The sealing ring is made of graphite or PEEK, which has good wear resistance and lubrication properties, thereby ensuring its service life.

[0040] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not limitations on the present invention. The specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and purpose of the present invention, but as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A sealing ring for a pump, comprising a pump housing (1) and a sealing ring body (8), characterized in that: The inner ring of the sealing ring body (8) is provided with an inner water groove (9), one end of the sealing ring body (8) is provided with an end surface water groove (10), a fixing block (11) is passed through one side of the top of the sealing ring body (8), and claws (12) are provided on both sides of the bottom of the fixing block (11).

2. The pump sealing ring according to claim 1, characterized in that: The cross section of the clamping claw (12) is circular, and the longitudinal section of the clamping claw (12) is triangular.

3. The pump sealing ring according to claim 1, characterized in that: A plurality of the fixing blocks (11) are provided, and the plurality of fixing blocks (11) are distributed in a ring array, and the cross-sections of the plurality of fixing blocks (11) are all in the shape of an "I".

4. The pump sealing ring according to claim 2, characterized in that: The clamping claws (12) are arranged in multiple groups, two in a group, and the two clamping claws (12) in each group are arranged in a mirror image.

5. The pump sealing ring according to claim 1, characterized in that: A plurality of the inner water troughs (9) and the end surface water troughs (10) are provided, and the plurality of inner water troughs (9) and the end surface water troughs (10) are distributed in a circular array, and the plurality of inner water troughs (9) and the plurality of end surface water troughs (10) are staggered.

6. The pump sealing ring according to claim 1, characterized in that: The sealing ring body (8) is made of graphite or PEEK material.

7. The pump sealing ring according to claim 1, characterized in that: The top of the pump housing (1) is penetrated by an organic seal (6), and the top of the organic seal (6) is penetrated by a motor shaft (5), and the outside of the motor shaft (5) is sleeved with an impeller (7), one side of the pump housing (1) is provided with an outlet (4), the bottom of the pump housing (1) is connected to a pump cover (2), and the bottom of the pump cover (2) is provided with an inlet (3), and two sealing ring bodies (8) are provided, and the two sealing ring bodies (8) are respectively connected to the inside of the pump housing (1) and the pump cover (2).

8. The pump sealing ring according to claim 7, characterized in that: The radial clearance and axial clearance between the sealing ring body (8) and the impeller (7) are both 0.1 mm to 0.2 mm.

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