Mechanical sealing structure for sliding bearing of submerged pump

Abstract

The utility model is suitable for the technical field of submerged pumps, and provides a submerged pump sliding bearing mechanical sealing structure which comprises a submerged pump body provided with a medium inlet and a medium outlet. The shaft rod penetrates through the submerged pump main body and is rotationally connected with the submerged pump main body; the bracket is fixed on the submerged pump main body; the sliding bearing is arranged on the support, and the sliding bearing is matched with the shaft rod; the assembly frame is arranged below the sliding bearing; the double-end-face mechanical sealing piece is arranged on the assembling frame and used for preventing a medium from leaking through a gap between the shaft rod and the sliding bearing, a normal-pressure cavity and a high-pressure cavity are formed in the double-end-face mechanical sealing piece, and a sealing water inlet, a first sealing water outlet and a second sealing water outlet are formed in the normal-pressure cavity. According to the submerged pump sliding bearing mechanical seal structure, media such as yellow phosphorus are isolated through the mechanical seal, the media do not enter the sliding bearing, and the service life of the bearing is prolonged; the service life and the stability of the pump are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of submersible pumps, and particularly relates to a mechanical seal structure for the sliding bearing of a submersible pump. Background Technique

[0002] A submersible pump is a positive-pressure conveying vertical pump. Usually, the impeller, pump body and other flow-through components are immersed in the material to be conveyed, and are connected to the motor by a shaft. Its working principle is based on the action of pressure difference and centrifugal force. The rotating impeller is driven by the motor, and the liquid is sucked into the pump body from the inlet by centrifugal force and then pushed out of the outlet of the pump body; this kind of pump can effectively solve the problems of air resistance and cavitation, and has the advantages of simple structure, safe and reliable operation, convenient use and maintenance, continuous and uniform liquid output, and stable pressure.

[0003] At present, when the traditional YHS type submersible pump conveys media containing particles, such as high-temperature media like yellow phosphorus, the media easily flows from the end of the impeller to the sliding bearing through the shaft gap, resulting in damage to the sliding bearing and reducing the operation stability and service life of the pump; therefore, it is necessary to improve the existing technology to improve the safety, operation reliability and service life of the pump equipment. Content of the Utility Model

[0004] The utility model provides a mechanical seal structure for the sliding bearing of a submersible pump, aiming to solve the problems that when the traditional YHS type submersible pump conveys high-temperature media containing particles, the media flows through the shaft gap to the sliding bearing, resulting in bearing damage and unstable operation.

[0005] The utility model is realized as follows. A mechanical seal structure for the sliding bearing of a submersible pump includes: a submersible pump main body having a media inlet and a media outlet; a shaft rod passing through and rotatably connected to the submersible pump main body; a bracket fixed on the submersible pump main body; a sliding bearing arranged on the bracket, the sliding bearing being adapted to the shaft rod; an assembly frame arranged below the sliding bearing; a double-end mechanical seal arranged on the assembly frame to prevent the leakage of media through the gap between the shaft rod and the sliding bearing, and an atmospheric pressure cavity and a high-pressure cavity are arranged on the double-end mechanical seal. Among them, a sealed water inlet, a first sealed water outlet and a second sealed water outlet are arranged on the atmospheric pressure cavity.

[0006] Preferably, the sliding bearing is provided with a flushing hole for guiding water, and the inner wall of the flushing hole is a smooth surface.

[0007] Preferably, the sealed water inlet is designed with an external interface for assembling a flushing pipeline, and a throttle valve is assembled on the flushing pipeline.

[0008] Preferably, pressure valves are arranged on both the first sealed water outlet and the second sealed water outlet.

[0009] Preferably, the first sealed water outlet and the second sealed water outlet are respectively connected to a recovery pipeline.

[0010] Preferably, the medium outlet of the submersible pump body is connected to an external pipeline through a liquid outlet pipe.

[0011] Preferably, bolts for limiting are arranged between the assembly frame and the double-ended mechanical seal, and the bolts are threadedly connected to the assembly frame and the double-ended mechanical seal.

[0012] Compared with the related art, the submersible pump sliding bearing mechanical seal structure provided by the present utility model has the following beneficial effects:

[0013] The mechanical seal isolates media such as yellow phosphorus, preventing the media from entering the sliding bearing and prolonging the bearing life; improving the pump life and stability; using a cartridge double-ended mechanical seal, which is simple and convenient to install; adopting high wear-resistant and high-temperature-resistant materials, increasing the service life of the sliding bearing and improving the pump operation life. Description of the Drawings

[0014] Figure 1 It is a schematic main cross-sectional view of a submersible pump sliding bearing mechanical seal structure provided by the present utility model;

[0015] Figure 2 is Figure 1 an enlarged schematic view of part A shown in

[0016] Figure 3 It is a schematic cross-sectional view of the double-ended mechanical seal in the present utility model;

[0017] Figure 4 It is a schematic cross-sectional view of the sliding bearing in the present utility model.

[0018] Reference numerals: 1, submersible pump body; 2, shaft rod; 3, bracket; 4, sliding bearing; 5, assembly frame; 6, double-ended mechanical seal; 7, atmospheric pressure cavity; 8, high-pressure cavity; 9, first sealed water outlet; 10, second sealed water outlet; 11, sealed water inlet; 12, impeller; 13, first medium inlet; 14, second medium outlet; 15, liquid outlet pipe; 16, bolt. Detailed Embodiments

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above drawings are intended to cover non-exclusive inclusion. The terms "first", "second", etc. in the specification and claims of this application or the above drawings are used to distinguish different objects and not to describe a specific order.

[0020] Reference to "embodiment" herein means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of this application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0021] An embodiment of the present utility model provides a mechanical seal structure for a submerged pump sliding bearing, as Figures 1-4 shown, the mechanical seal structure for the submerged pump sliding bearing includes: a submerged pump main body 1 having a medium inlet 13 and a medium outlet 14; a shaft rod 2 passing through and rotatably connected to the submerged pump main body 1; a bracket 3 fixed on the submerged pump main body 1; a sliding bearing 4 provided on the bracket 3, the sliding bearing 4 being adapted to the shaft rod 2; an assembly frame 5 provided below the sliding bearing 4; a double-end mechanical seal 6 provided on the assembly frame 5 to prevent the leakage of the medium through the gap between the shaft rod 2 and the sliding bearing 4, and an atmospheric pressure chamber 7 and a high-pressure chamber 8 are provided on the double-end mechanical seal 6, wherein a sealed water inlet 11, a first sealed water outlet 9, and a second sealed water outlet 10 are provided on the atmospheric pressure chamber 7.

[0022] It should be noted that currently, traditional YHS submersible pumps have obvious performance shortcomings when dealing with media containing particles, especially high-temperature media such as yellow phosphorus. During the operation of the pump, particulate matter in these media can easily penetrate through the shaft clearance from the end of the impeller into the sliding bearing area. This penetration not only directly threatens the structural integrity of the sliding bearing, leading to premature damage to the bearing, but also seriously affects the overall operational stability and service life of the pump; as one of the core components of the submersible pump, the working condition of the sliding bearing is directly related to the overall performance of the pump; once the bearing is damaged, not only will the working efficiency of the pump decrease significantly, but it may also trigger more serious safety accidents; therefore, for traditional YHS submersible pumps, how to effectively prevent media particles from entering the sliding bearing area through the shaft clearance has become an urgent problem to be solved; in response to this problem, it is particularly necessary to improve the existing technology;

[0023] In this embodiment, the submersible pump body 1: serves as the foundation of the entire pump device. Inside the submersible pump body 1, there are a medium inlet 13 and a medium outlet 14, which are respectively used for the input and output of the medium; the shaft rod 2: penetrates through the submersible pump body 1 and is rotatably connected thereto. It is a key component for power transmission of the pump and is responsible for driving the impeller to rotate to complete the transportation of the medium; the bracket 3: is fixed on the submersible pump body 1 and plays a role in supporting and fixing other components to ensure the stable operation of each component; the sliding bearing 4: is arranged on the bracket 3 and is adapted to the shaft rod 2, playing a role in supporting and guiding the rotation of the shaft rod 2; the design of the sliding bearing 4 is crucial for reducing friction and improving the operating efficiency of the pump; the assembly frame 5: is located below the sliding bearing 4 and is used for fixing and supporting other sealing components; the double mechanical seal 6: is arranged on the assembly frame 5, and its key role is to prevent the medium from leaking through the gap between the shaft rod 2 and the sliding bearing 4; the double-end design makes the sealing effect more reliable and is applicable to high-pressure, high-temperature or particle-containing medium environments; the atmospheric pressure cavity 7 and the high-pressure cavity 8: these two cavity designs on the double mechanical seal 6 not only help to achieve the sealing effect but also facilitate the cooling and flushing of the seal; the seal water inlet 11, the first seal water outlet 9, and the second seal water outlet 10: are located on the atmospheric pressure cavity 7. Through these interfaces, an external flushing pipeline and a cooling device can be connected to achieve the cooling and flushing of the double mechanical seal 6, ensuring the normal operation of the seal and extending its service life; through the setting of the double mechanical seal 6, the leakage of the medium through the gap between the shaft rod 2 and the sliding bearing 4 is effectively prevented, greatly improving the operating stability and safety of the pump; the optimized design of the sliding bearing 4 reduces friction, making the rotation of the shaft rod 2 smoother, thereby improving the working efficiency of the pump; by regularly cooling and flushing the double mechanical seal 6, the medium residue is removed, the wear of the seal is reduced, and the service life of the pump device is extended; the submersible pump sliding bearing mechanical seal structure in this embodiment is particularly suitable for dealing with particle-containing media such as high-temperature media like yellow phosphorus, and its excellent performance enables the pump device to operate stably in a harsh working environment.

[0024] In a further preferred embodiment of the present utility model, the sliding bearing 4 is provided with a flushing hole for guiding water, and the inner wall of the flushing hole is a smooth surface.

[0025] In this embodiment, the sliding bearing 4 is provided with special flushing holes, which are connected to an external flushing pipeline; through the external flushing pipeline, the sliding bearing 4 can be flushed regularly to effectively remove the medium residue on the surface and inside of the sliding bearing; by regularly flushing the sliding bearing 4, the medium residue on the bearing surface and inside can be completely removed, preventing bearing wear and blockage caused by medium accumulation.

[0026] In a further preferred embodiment of the present utility model, the sealed water inlet 11 is designed with an external interface for assembling a flushing pipeline, and a throttle valve is assembled on the flushing pipeline.

[0027] In this embodiment, the sealed water inlet 11 is designed with an external interface, enabling the water inlet to be conveniently connected to the flushing pipeline; this design allows users to access the flushing pipeline at any time according to needs to flush the sealing structure; a throttle valve and a pressure gauge are assembled on the external flushing pipeline. The throttle valve is used to control the flow rate of the flushing fluid, and users can adjust the flow rate of the flushing fluid according to actual needs to achieve the best flushing effect; the pressure gauge is used to monitor the pressure of the flushing fluid in real time to ensure that the flushing process is carried out within a safe pressure range.

[0028] In a further preferred embodiment of the present utility model, pressure valves are provided at both the first sealed water outlet 9 and the second sealed water outlet 10.

[0029] In this embodiment, pressure valves are provided at both the first sealed water outlet 9 and the second sealed water outlet 10; these pressure valves are used to regulate and control the pressure at the water outlets to ensure the stable operation of the sealing structure at an appropriate pressure; by adjusting the pressure valves, the pressure inside the sealing cavity can be balanced to prevent sealing failure caused by too high or too low pressure; Material selection of the double-ended mechanical seal 6: The double-ended mechanical seal 6 is made of high wear-resistant and high-temperature-resistant materials; this material has excellent wear resistance and high-temperature resistance, enabling the seal to operate stably for a long time under the conditions of transporting high-temperature, high-hardness, and fine-particle media, effectively preventing medium leakage.

[0030] In a further preferred embodiment of the present utility model, the first sealed water outlet 9 and the second sealed water outlet 10 are respectively connected to a recovery pipeline.

[0031] In this embodiment, for the first sealed water outlet 9, by connecting it to the recovery pipeline, effective recovery of these liquids or gases can be achieved, avoiding waste of resources. The second sealed water outlet 10 may be used to discharge liquids or gases different from those of the first sealed water outlet 9, or for discharging operations under specific circumstances. Since the water outlets are directly connected to the recovery pipeline, the possible leakage points are reduced, thereby improving the safety and stability of the equipment.

[0032] In a further preferred embodiment of the present utility model, the medium outlet 14 of the submersible pump body 1 is connected to an external pipeline through a liquid outlet pipe.

[0033] In this embodiment, the medium outlet of the submersible pump body 1 is a key channel for the internal medium flow of the pump body. Through it, liquids or gases are discharged from the pump body to complete the pumping process, realizing the smooth flow of the medium between the pump body and the external system.

[0034] In a further preferred embodiment of the present utility model, a bolt 16 for limiting is provided between the mounting frame 5 and the double-ended mechanical seal 6, and the bolt 16 is threadedly connected to the mounting frame 5 and the double-ended mechanical seal 6.

[0035] In this embodiment, the mounting frame 5 and the double-ended mechanical seal 6 are fixedly connected by bolts 16 or other fasteners. This fastening connection method makes the connection between the mounting frame 5 and the double-ended mechanical seal 6 more firm and reliable, effectively preventing loosening or displacement caused by vibration or impact during operation, thus ensuring the stability of the sealing effect and the normal operation of the pump.

[0036] In summary, the submersible pump body 1, as the core component of the entire system, sucks in liquid through its medium inlet 13, and inside, the impeller 12 is driven to rotate by the rotation of the shaft rod 2, so that the liquid obtains energy and is discharged from the medium outlet 14; the shaft rod 2 penetrates through the submersible pump body 1 and is rotatably connected to the sliding bearing 4 to ensure that the shaft rod 2 can rotate stably and smoothly; the key design of the sliding bearing 4 lies in the flushing hole inside it. This flushing hole not only has the function of guiding water, but also its smooth inner wall helps to reduce fluid resistance and improve the operating efficiency of the bearing; at the same time, the flushing hole can effectively prevent the medium from accumulating in the bearing, keeping the bearing clean and lubricated; the double-ended mechanical seal 6, as a key component to prevent medium leakage, has a delicate design. Through the settings of the high-pressure cavity 8 and the atmospheric-pressure cavity 7, double sealing of the medium is achieved. Under the action of the high-pressure cavity 8, media such as yellow phosphorus are effectively blocked outside the seal, preventing the medium from entering the sliding bearing and increasing the bearing life; improving the pump life and stability. It not only solves the performance shortcoming of the traditional YHS type submersible pump when dealing with particulate media, but also significantly improves the operating stability, safety and service life of the pump, providing strong support for the development and application of submersible pump technology.

[0037] Compared with the related technology, the mechanical seal is used to isolate media such as yellow phosphorus, preventing the medium from entering the sliding bearing and increasing the bearing life; improving the pump life and stability; using a cartridge double-ended mechanical seal, which is simple and convenient to install; adopting high wear-resistant and high-temperature-resistant materials, increasing the service life of the sliding bearing and improving the pump operating life.

[0038] It should be noted that the circuits, electronic components and modules involved in the present utility model are all prior arts, which can be fully realized by those skilled in the art without further elaboration. The content protected by the present utility model does not involve improvements to software and methods.

[0039] In several embodiments provided by the present application, it should be understood that the disclosed device can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the above division of units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed coupling or communication connection between each other can be through some interfaces. The indirect coupling or communication connection between devices or units can be in the form of telecommunications or other forms.

[0040] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting the protection scope of the invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on these embodiments, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art can still, without conflict and without creative efforts, combine, add, delete or make other adjustments to the features in the various embodiments of the present invention according to the situation, so as to obtain different technical solutions that essentially do not depart from the concept of the present invention. These technical solutions also belong to the scope of protection of the present invention.

Claims

1. A mechanical seal structure for a submersible pump sliding bearing, characterized in that: include: The submersible pump body has a medium inlet and a medium outlet; A shaft extending through the submersible pump body and rotatably connected thereto; A bracket fixed on the submersible pump body; A sliding bearing disposed on the bracket, wherein the sliding bearing is adapted to the shaft rod; An assembly frame disposed below the sliding bearing; A double-end mechanical seal is arranged on the assembly frame to prevent the medium from leaking through the gap between the shaft and the sliding bearing. The double-end mechanical seal is provided with a normal pressure cavity and a high pressure cavity, wherein the normal pressure cavity is provided with a sealed water inlet, a first sealed water outlet and a second sealed water outlet.

2. The mechanical seal structure of the submersible pump sliding bearing according to claim 1, characterized in that: The sliding bearing is provided with a flushing hole for conducting water, and the inner wall of the flushing hole is a smooth surface.

3. The mechanical seal structure of the submersible pump sliding bearing according to claim 1, characterized in that: The sealed water inlet is designed with an external interface for assembling a flushing pipeline, and a throttle valve is installed on the flushing pipeline.

4. The mechanical seal structure of the submersible pump sliding bearing according to claim 1, characterized in that: The first sealed water outlet and the second sealed water outlet are both provided with pressure valves.

5. The mechanical seal structure of the submersible pump sliding bearing according to claim 1, characterized in that: The first sealed water outlet and the second sealed water outlet are respectively connected to a recovery pipeline.

6. The mechanical seal structure of the submersible pump sliding bearing according to claim 1, characterized in that: The medium outlet of the submersible pump body is connected to an external pipeline through a liquid outlet pipe.

7. The mechanical seal structure of the submersible pump sliding bearing according to claim 1, characterized in that: Bolts for limiting position are arranged between the assembly frame and the double-end mechanical seal, and the bolts are threadedly connected with the assembly frame and the double-end mechanical seal.

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