A cylinder seal protection device

Abstract

The utility model relates to oil cylinder sealing piece protection technical field discloses an oil cylinder sealing piece protection device, including the oil cylinder body through bolt fixed mounting in the lower end of submersible pump machine cylinder, the oil cylinder upper cover through bolt fixed mounting in the lower end of oil cylinder body, the oil cylinder lower cover through bolt fixed mounting on the submersible pump pump body, the oil cylinder lower cover is fixedly connected through bolt with the oil cylinder upper cover, the oil cylinder body and the oil cylinder upper cover between form the oil room cavity for accommodating cooling oil, the oil cylinder inner seal is set up between the oil cylinder body and the oil cylinder upper cover in the oil room cavity, and the low pressure cavity is formed between the oil cylinder upper cover and the oil cylinder lower cover, and the oil cylinder lower cover bottom is contacted with high pressure water, and the oil cylinder lower cover lower extreme is equipped with the oil cylinder outer seal. Its purpose is, solves the submersible pump of current, and the pump body lacks effective protection structure, and in long -term operation, the high pressure water in the pump body can continuously extrude cavity sealing element, leads to sealing element to gradually fail, and the service life and the reliability of equipment are affected.

Description

Technical Field

[0001] This utility model belongs to the field of hydraulic cylinder seal protection technology, and specifically relates to a hydraulic cylinder seal protection device. Background Technology

[0002] Water pumps, as common fluid transport devices, are widely used in water supply, drainage, and cooling systems in industrial, agricultural, and civil fields. A typical water pump usually consists of a pump body, impeller, pump shaft, and sealing components. Its working principle involves a motor driving the pump shaft to rotate the impeller, causing the liquid to be pressurized and transported to the target location. To ensure lubrication and cooling of the moving parts inside the pump body, a separate oil chamber is usually provided, and seals isolate the working medium of the pump from the cooling oil inside the oil chamber to ensure long-term stable operation of the pump.

[0003] However, in practical applications, due to limitations in structural design or maintenance conditions, such water pumps have certain technical defects. Specifically, because the pump body lacks effective protective structures such as a cylinder cover, during long-term operation, the high-pressure water inside the pump body continuously squeezes the cavity seals, causing them to gradually fail. This allows water and sediment particles to slowly seep into the oil chamber. If the pump is not repaired in time, the seepage will intensify, causing severe corrosion and wear of the pump shaft and seals. Simultaneously, cooling oil leakage will occur, ultimately leading to motor burnout due to overheating, severely impacting the equipment's service life and operational reliability. Therefore, we propose a cylinder seal protection device to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to solve the problem that current submersible pumps lack an effective protective structure for the pump body. During long-term operation, the high-pressure water inside the pump body will continuously squeeze the cavity seals, causing the seals to gradually fail and affecting the service life and reliability of the equipment.

[0005] To achieve the above-mentioned technical objectives, the technical solution adopted by this utility model is as follows: A hydraulic cylinder seal protection device includes a hydraulic cylinder body fixedly mounted to the lower end of a submersible pump barrel by bolts, a hydraulic cylinder upper cover fixedly mounted to the lower end of the hydraulic cylinder body by bolts, and a hydraulic cylinder lower cover fixedly mounted to the pump body of the submersible pump by bolts. The lower cover is fixedly connected to the upper cover by bolts. An oil chamber for accommodating cooling oil is formed between the hydraulic cylinder body and the upper cover. An inner seal is provided in the oil chamber between the hydraulic cylinder body and the upper cover. A low-pressure chamber is formed between the upper cover and the lower cover. The bottom of the lower cover is in contact with high-pressure water. An outer seal is provided at the lower end of the lower cover. A pump body cavity is formed between the lower cover and the pump body. An impeller connected to the output shaft of the submersible pump motor is provided in the pump body cavity. The output shaft of the motor passes through the oil chamber cavity and the low-pressure chamber to the pump body cavity. The inner seal and the outer seal are both sleeved on the output shaft of the submersible pump motor. The upper cover and the lower cover of the cylinder can be configured as an integrally formed composite cover for the cylinder.

[0006] Furthermore, both the internal and external seals of the hydraulic cylinder can be mechanical seals, consisting of multiple stationary rings, a rotating ring, an auxiliary sealing ring, and a spring. This structural design prevents high-pressure water from entering the oil chamber from the pump body cavity.

[0007] Furthermore, multiple mud and sand discharge ports connected to the low-pressure chamber are provided between the upper and lower covers of the cylinder. This structural design allows mud and sand that has been squeezed and seeped into the low-pressure chamber from the pump body to be directly discharged through the discharge ports on the upper cover of the cylinder, preventing it from entering the oil chamber and avoiding the risk of water ingress into the oil chamber. This significantly improves the service life of the cylinder seals.

[0008] Furthermore, the connections between the cylinder body, cylinder upper cover, cylinder lower cover, and pump body can all be fitted with suitable sealing structures according to sealing requirements. This structural design improves the sealing performance of component connections, preventing leakage at the joints.

[0009] The utility model adopting the above technical solution has the following advantages: This invention adds an upper cover between the cylinder body and the lower cover. The upper cover has several drain ports, and the upper cover and the lower cover form a low-pressure chamber. Mud and sand that are squeezed and seep into the low-pressure chamber from the pump body are directly discharged through the mud and sand drain ports and will not enter the oil chamber, thus avoiding the risk of water entering the oil chamber. This greatly improves the service life of the cylinder seals. Attached Figure Description

[0010] This utility model can be further illustrated by the non-limiting embodiments given in the accompanying drawings; Figure 1 This is a schematic diagram of the structure of a hydraulic cylinder seal protection device according to the present invention; Figure 2 This is a schematic diagram of the structure of a hydraulic cylinder seal protection device installed inside a submersible pump according to the present invention.

[0011] The symbols for the main components are explained below: 1. Cylinder body; 2. Cylinder top cover; 3. Cylinder bottom cover; 4. Cylinder inner seal; 5. Cylinder outer seal; 6. Mud and sand discharge port. Detailed Implementation

[0012] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0013] The terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or apparatuses.

[0014] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0015] like Figures 1-2As shown, this utility model discloses a hydraulic cylinder seal protection device, comprising a hydraulic cylinder body 1 bolted to the lower end of a submersible pump barrel, a hydraulic cylinder upper cover 2 bolted to the lower end of the hydraulic cylinder body 1, and a hydraulic cylinder lower cover 3 bolted to the pump body of the submersible pump. The lower cover 3 is bolted to the upper cover 2. An oil chamber for accommodating cooling oil is formed between the hydraulic cylinder body 1 and the upper cover 2. An internal hydraulic cylinder seal 4 is provided in the oil chamber between the hydraulic cylinder body 1 and the upper cover 2. A seal 4 is formed between the upper cover 2 and the lower cover 3. The cylinder lower cover 3, which has a low-pressure chamber, is in contact with high-pressure water at its bottom. The lower end of the cylinder lower cover 3 is provided with an external cylinder seal 5. A pump body cavity is formed between the cylinder lower cover 3 and the pump body. An impeller connected to the output shaft of the submersible pump motor is provided in the pump body cavity. The output shaft of the motor passes through the oil chamber cavity, the low-pressure chamber and into the pump body cavity. The cylinder inner seal 4 and the cylinder outer seal 5 are both sleeved on the output shaft of the submersible pump motor. Rubber sealing rings are provided at the connection points between the cylinder body 1, the cylinder upper cover 2, the cylinder lower cover 3 and the pump body to improve the sealing performance of the component connection points and prevent leakage at the connection points.

[0016] The upper cover 2 and the lower cover 3 of the hydraulic cylinder can be configured as an integrally formed composite cover for the hydraulic cylinder.

[0017] Both the internal seal 4 and the external seal 5 of the hydraulic cylinder can be mechanical seals (other sealing structures can also be selected depending on the specific circumstances, such as...). Figure 1 and Figure 2 In the example, the external seal 5 of the oil cylinder is a skeleton oil seal. The mechanical seal consists of a stationary ring, a dynamic ring, an auxiliary sealing ring and a spring, which can prevent high-pressure water in the pump body cavity from entering the oil chamber cavity.

[0018] Multiple mud and sand discharge ports 6 connected to the low-pressure chamber are provided between the upper cover 2 and the lower cover 3 of the cylinder. Mud and sand that are squeezed and seep into the low-pressure chamber from the pump body can be discharged directly through the discharge ports of the upper cover of the cylinder and will not enter the oil chamber, thus avoiding the risk of water entering the oil chamber and greatly improving the service life of the cylinder seals.

[0019] The method of using this utility model is as follows: When the submersible pump motor is powered on, the motor output shaft drives the impeller inside the pump body cavity to rotate at high speed, generating high-pressure water inside the pump body cavity. On one hand, the high-pressure water inside the pump body cavity is delivered to its destination through relevant pipelines. At the same time, the high-pressure water inside the pump body cavity will squeeze the outer seal 5 of the oil cylinder located between the lower cover 3 of the oil cylinder and the impeller. Meanwhile, mud and water will gradually seep upward. At this time, the low-pressure cavity formed by the upper cover 2 and the lower cover 3 of the oil cylinder can receive the seeping mud and water and discharge it outward through the mud and sand discharge port 6. This prevents mud and sand from entering the oil chamber cavity, avoids the risk of water entering the oil chamber, and greatly improves the service life of the oil cylinder seals.

[0020] It should be noted that, for the sake of simplicity, the foregoing method embodiments are all described as a series of actions. However, those skilled in the art should understand that this application is not limited to the described order of actions, as some steps may be performed in other orders or simultaneously according to this application. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions and modules involved are not necessarily essential to this application.

[0021] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0022] In the several embodiments provided in this application, it should be understood that the disclosed apparatus can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between devices or units may be electrical or other forms.

[0023] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0024] The embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A hydraulic cylinder seal protection device, characterized in that: The system includes a cylinder body (1) bolted to the lower end of the submersible pump barrel, a cylinder top cover (2) bolted to the lower end of the cylinder body (1), and a cylinder bottom cover (3) bolted to the submersible pump body. The cylinder bottom cover (3) is bolted to the cylinder top cover (2). An oil chamber for accommodating cooling oil is formed between the cylinder body (1) and the cylinder top cover (2). A cylinder is disposed within the oil chamber between the cylinder body (1) and the cylinder top cover (2). The inner seal (4) forms a low-pressure chamber between the upper cover (2) and the lower cover (3) of the cylinder. The bottom of the lower cover (3) of the cylinder is in contact with high-pressure water. The lower end of the lower cover (3) of the cylinder is provided with an outer seal (5). The lower cover (3) of the cylinder and the pump body form a pump body cavity. An impeller connected to the output shaft of the submersible pump motor is provided in the pump body cavity. The output shaft of the motor passes through the oil chamber cavity and the low-pressure chamber to the pump body cavity. The inner seal (4) and the outer seal (5) of the cylinder are both sleeved on the output shaft of the submersible pump motor. The upper cover (2) and the lower cover (3) of the cylinder can be configured as an integrally formed composite cover for the cylinder.

2. The cylinder seal protection device according to claim 1, characterized in that: Both the inner seal (4) and the outer seal (5) of the cylinder can be mechanical seals, which consist of multiple stationary rings, dynamic rings, auxiliary sealing rings and springs.

3. The cylinder seal protection device according to claim 1, characterized in that: Multiple mud and sand discharge ports (6) connected to the low-pressure chamber are provided between the upper cover (2) and the lower cover (3) of the oil cylinder.

4. The cylinder seal protection device according to claim 1, characterized in that: The connection points between the cylinder body (1), cylinder upper cover (2), cylinder lower cover (3) and pump body can be equipped with suitable sealing structures according to sealing requirements.

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