Centrifugal pump with external lubrication circuit

Abstract

The utility model discloses a centrifugal pump with external lubricating oil circuit, including centrifugal pump body and the bearing box of centrifugal pump body connection, bearing box is connected with external oil circuit system, external oil circuit system includes the oil filter tank for filtering lubricating oil and sets up on the bearing box and is used for the oil mist spray of oil nozzle shower nozzle, the oil outlet end of oil filter tank is connected with the pressurizing pump between oil nozzle shower nozzle, bearing box bottom is provided with the oil hole, the oil inlet end of oil filter tank is connected oil hole. Centrifugal pump with external lubricating oil circuit of the utility model connects external oil circuit, can not stop working when supplementing and replacing lubricating oil, and lubricating oil is filtered automatically, can adopt the mode of oil mist lubrication and lubricate bearing box.

Description

Technical Field

[0001] This utility model belongs to the field of centrifugal pump technology, specifically relating to a centrifugal pump with an external lubrication oil circuit. Background Technology

[0002] Centrifugal pumps are among the most widely used pump types in the industry, with the broadest application range. They are characterized by their simple structure, stable operation, high efficiency, wide range of selectable parameters, ease of maintenance, and suitability for various fields. The design of this type of pump typically considers increasing the shaft diameter and the oil storage capacity of the oil tank to ensure adequate lubrication and cooling of the bearings.

[0003] In practical applications of centrifugal pumps in some petrochemical industries and flammable and explosive areas, it is required that lubricating oil not be stored on-site. Therefore, without oil bath lubrication, the bearings cannot be lubricated or cooled. Utility Model Content

[0004] The purpose of this invention is to provide a centrifugal pump with an external lubrication circuit. It utilizes an external oil circuit to deliver lubricating oil to the pump end. If the oil circuit is interrupted, a booster pump is added to pressurize the lubricating oil to the pressure required to spray it into a mist at the nozzle, thus lubricating the bearing. After the atomized lubricating oil returns to liquid and settles at the bottom of the bearing housing, the lubricating oil is discharged from the pump bearing housing via an external pipeline to an oil filter tank located in a safe area (the oil filter tank is divided into two sections; the front section stores the lubricating oil discharged from the bearing housing, and the oil is filtered through a middle filter screen before being discharged to the rear section). This oil filter tank effectively solves the problem of daily lubricating oil replenishment and replacement.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A centrifugal pump with an external lubrication circuit includes a centrifugal pump body and a bearing housing connected to the centrifugal pump body. The bearing housing is connected to an external oil circuit system, which includes an oil filter for filtering lubricating oil and an oil nozzle installed on the bearing housing for spraying oil mist. A pressure pump is connected between the oil outlet of the oil filter and the oil nozzle. An oil outlet hole is provided at the bottom of the bearing housing, and the oil inlet of the oil filter is connected to the oil outlet hole.

[0007] The working process and principle of the above structure are as follows:

[0008] The system uses an external oil circuit to deliver lubricating oil to the centrifugal pump body. A booster pump is added in the middle of the oil circuit to pressurize the lubricating oil to the pressure required to spray it into a mist at the nozzle. This pressure cools and lubricates the bearings inside the bearing housing. As the pressure decreases within the bearing housing, the lubricating oil changes from a mist to a liquid state. Once the mist-like lubricating oil settles back into a liquid at the bottom of the bearing housing, it is discharged through the external oil circuit to a filter tank located in a safe area (the filter tank is divided into two sections; the front section stores the lubricating oil discharged from the bearing housing, which is then filtered through an intermediate filter before being sent to the rear section). The lubricating oil filtered in the filter tank continues to be pumped into the centrifugal pump body under the pressure of the booster pump. Inside the bearing housing of the centrifugal pump, this oil filter effectively addresses the daily replenishment and replacement of lubricating oil. Lubricating oil can be added or completely replaced via the filter. During normal operation of the centrifugal pump, it prevents short-term oil shortages caused by external lubricating oil replacement or replenishment. When changing the lubricating oil, the oil in the downstream section of the filter maintains the pump's normal operation, ensuring long-term stable use. The filter serves to filter impurities and store clean lubricating oil; it also allows for the rapid discharge of unclean lubricating oil, enabling lubricating oil replacement without stopping the pump, ensuring continuous pump operation and avoiding the risks associated with on-site lubricating oil changes.

[0009] Furthermore, an oil supply pipeline is connected between the oil outlet of the oil filter tank and the oil nozzle, the pressure pump is installed on the oil supply pipeline and connected to the oil supply pipeline, and an oil discharge pipeline is connected between the oil outlet and the oil filter tank.

[0010] The oil filter box and bearing box are connected by oil supply and drainage pipelines to form an oil transmission system, and the distance between the two is increased to avoid environmental problems caused by on-site replacement of lubricating oil or lubricating oil leakage, as well as the requirement that oil products should not be stored in various flammable and explosive areas.

[0011] Furthermore, the oil filter box includes a filter box and an oil storage tank. A vertically arranged partition plate is provided between the filter box and the oil storage tank. The filter box is connected to the oil drain pipe, and the oil storage tank is connected to the oil delivery pipe. A filter screen is provided on the upper part of the partition plate.

[0012] The partition plate separates the filter box and the oil storage tank, and the filter screen on the top allows the lubricating oil discharged from the bearing box to be filtered through the filter screen and then discharged into the oil storage tank, which facilitates continuous lubricating oil circulation. The filtered impurities sink to the bottom of the filter box, waiting to be discharged later.

[0013] Furthermore, the bottom of the filter box is provided with an oil drain hole, and a plug is provided on the oil drain hole.

[0014] Open the drain hole on the filter box to quickly drain the unclean lubricating oil containing impurities. When not draining lubricating oil, plug the drain hole with a plug.

[0015] Furthermore, the oil supply and discharge pipelines are made of corrosion-resistant oil pipes.

[0016] Corrosion-resistant oil pipes have a longer service life.

[0017] Beneficial Effects: This utility model, through the combination of an external oil circuit system, can avoid potential hazards and environmental pollution in the petrochemical industry and various flammable and explosive areas. It can also effectively extend the maintenance cycle of centrifugal pumps and increase their service life. It effectively meets the requirements of the petrochemical industry and various flammable and explosive areas where large quantities of oil are not present. The external oil circuit system circulates the lubricating oil, and the booster pump pressurizes the lubricating oil to achieve a mist-like lubricating oil state under pressure, ensuring the long-term safe and effective continuous operation of the centrifugal pump and avoiding downtime caused by lubricating oil changes. The external oil circuit combined with a filter box filters impurities from the lubricating oil under normal conditions. During a complete lubricating oil change, the lubricating oil stored in the downstream section of the filter box maintains the normal operation of the oil mist, facilitating rapid complete lubricating oil replacement. It avoids environmental problems caused by on-site lubricating oil changes or leaks and meets the requirements of not storing oil in various flammable and explosive areas. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a top view of the present invention.

[0020] Reference numerals in the attached diagram: 1. Centrifugal pump body; 2. Bearing housing; 3. Oil nozzle; 4. Booster pump; 5. Oil outlet; 6. Oil delivery pipeline; 7. Oil discharge pipeline; 8. Filter box; 9. Oil storage tank; 10. Divider plate; 11. Filter screen; 12. Oil discharge hole; 13. Plug. Detailed Implementation

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the present utility model will be briefly introduced below in conjunction with the accompanying drawings and descriptions of the embodiments or the prior art. Obviously, the following description of the structure of the accompanying drawings is only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. It should be noted that the description of these embodiments is used to help understand this utility model, but does not constitute a limitation on this utility model.

[0022] Example:

[0023] like Figure 1 and Figure 2 As shown, this embodiment provides a centrifugal pump with an external lubrication circuit, including a centrifugal pump body 1 and a bearing housing 2 connected to the centrifugal pump body 1. The bearing housing 2 is connected to an external oil circuit system, which includes an oil filter box for filtering lubricating oil and an oil nozzle 3 installed on the bearing housing 2 for spraying oil mist. A pressure pump 4 is connected between the oil outlet end of the oil filter box and the oil nozzle 3 to ensure a pressure of 3-7 kg at the nozzle; the pump sprays 7.3-10.3 L / min of lubricating oil. An oil outlet hole 5 is provided at the bottom of the bearing housing 2, and the oil inlet end of the oil filter box is connected to the oil outlet hole 5.

[0024] The working process and principle of the above structure are as follows:

[0025] An external oil circuit system is used to deliver lubricating oil to the centrifugal pump body. A booster pump is added in the middle of the oil circuit to pressurize the lubricating oil to the pressure required for the oil nozzle 3 to spray the lubricating oil into a mist. This pressure cools and lubricates the bearings inside the bearing housing 2. After the pressure of the oil mist decreases inside the bearing housing 2, the lubricating oil changes from a mist state to a liquid state. Once the mist-like lubricating oil returns to a liquid state and settles at the bottom of the bearing housing 2, the lubricating oil is discharged through the oil outlet 5 of the bearing housing 2 to an oil filter tank (the oil filter tank is divided into two sections; the front section stores the lubricating oil discharged from the bearing housing 2, which is then filtered through an intermediate filter screen before being sent to the rear section) located in a safe area via the external oil circuit system. The lubricating oil filtered through the oil tank continues to be input into the centrifugal pump under the pressure of the booster pump 4. Inside the bearing housing 2 of the pump body 1, this oil filter tank effectively solves the problem of daily replenishment and replacement of lubricating oil. Lubricating oil can be added or completely replaced through the oil filter tank. During normal operation of the centrifugal pump body 1, it can prevent short-term oil shortage caused by external replacement or replenishment of lubricating oil. When replacing lubricating oil, the oil in the downstream section of the oil filter tank is used to maintain the normal operation of the pump and ensure long-term stable operation. The oil filter tank has the function of filtering impurities and storing clean lubricating oil. It can also quickly drain unclean lubricating oil from the oil filter tank, allowing the lubricating oil to be replaced without stopping the pump, ensuring the continuous operation of the water pump, and avoiding the risk of having to replace the lubricating oil on site.

[0026] In another embodiment of this utility model, such as Figure 1 and Figure 2 As shown, an oil supply line 6 is connected between the oil outlet of the oil filter tank and the oil nozzle 3. A distributor is connected to the end of the oil supply line 6. The distributor is connected to two oil pipes, which are respectively connected to two oil nozzles 3, thereby increasing the oil spraying area. A booster pump 4 is installed on the oil supply line 6 and connected to the oil supply line 6. An oil drain line 7 is connected between the oil outlet 5 and the oil filter tank.

[0027] The oil filter box and bearing box 2 are connected by oil supply line 6 and oil discharge line 7 to form an oil transmission system and increase the distance between them to avoid environmental problems caused by on-site replacement of lubricating oil or lubricating oil leakage, as well as the requirement that oil products should not be stored in various flammable and explosive areas.

[0028] In another embodiment of this utility model, such as Figure 1 and Figure 2 As shown, the oil filter box includes a filter box 8 and an oil storage tank 9. A vertically arranged partition plate 10 is provided between the filter box 8 and the oil storage tank 9. The partition plate 10 divides the oil filter box into the filter box 8 and the oil storage tank 9. The filter box 8 is connected to the oil drain pipe 7, and the oil storage tank 9 is connected to the oil delivery pipe 6. A filter screen 11 is provided on the upper part of the partition plate 10.

[0029] The partition plate 10 separates the filter box 8 and the oil storage tank 9, and the filter screen 11 on its upper part allows the lubricating oil discharged from the bearing box 2 to be filtered through the filter screen 11 and then discharged into the oil storage tank 9, which facilitates continuous lubricating oil circulation. The filtered impurities sink to the bottom of the filter box 8, waiting to be discharged later.

[0030] In another embodiment of this utility model, such as Figure 1 As shown, an oil drain hole 12 is provided at the bottom of the side wall of the filter box 8, and a plug 13 is provided on the oil drain hole 12.

[0031] Open the oil drain hole 12 on the filter box 8 to quickly drain the unclean lubricating oil containing impurities. When not draining lubricating oil, plug the oil drain hole 12 with the plug 13.

[0032] In another embodiment of this utility model, such as Figure 1 and Figure 2 As shown, the oil supply line 6 and the oil discharge line 7 are made of corrosion-resistant oil pipes.

[0033] Corrosion-resistant oil pipes have a longer service life.

[0034] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A centrifugal pump having an externally routed lubricating oil path, comprising a centrifugal pump body and a bearing housing connected to the centrifugal pump body, characterized by, The bearing housing is connected to an external oil circuit system, which includes an oil filter box for filtering lubricating oil and an oil nozzle installed on the bearing housing for spraying oil mist. A pressure pump is connected between the oil outlet end of the oil filter box and the oil nozzle. An oil outlet hole is opened at the bottom of the bearing housing, and the oil inlet end of the oil filter box is connected to the oil outlet hole.

2. The centrifugal pump with an external lubricating oil passage according to claim 1, characterized by, An oil supply pipeline is connected between the oil outlet of the oil filter tank and the oil nozzle. The pressure pump is installed on the oil supply pipeline and connected to the oil supply pipeline. An oil discharge pipeline is connected between the oil outlet and the oil filter tank.

3. The centrifugal pump with an external lubrication oil passage according to claim 2, characterized by, The oil filter box includes a filter box and an oil storage tank. A vertically arranged partition plate is provided between the filter box and the oil storage tank. The filter box is connected to the oil drain pipe, and the oil storage tank is connected to the oil delivery pipe. A filter screen is provided on the upper part of the partition plate.

4. The centrifugal pump with an external lubrication oil passage according to claim 3, characterized by, The filter box is provided with an oil drain hole at the bottom, and a plug is provided on the oil drain hole.

5. The centrifugal pump with an external lubrication oil passage according to claim 2, characterized by, The oil delivery and discharge pipelines are made of corrosion-resistant oil pipes.

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