A kind of machine pump micro-positive pressure bearing box oiling device

Abstract

The utility model discloses a kind of machine pump micro-positive pressure bearing box oiling device, it is related to chemical equipment auxiliary device technical field, and it includes: machine pump, machine pump is equipped with bearing box;Oil tank, oil tank is fixedly installed at the upper portion of bearing box at preset height, the top of oil tank is communicated with oiling hopper, first valve is arranged in series on the communication path of oiling hopper and oil tank;The top of oil tank is also communicated with pressure relief elbow pipe, second valve is arranged in series on pressure relief elbow pipe;Pressure gauge for detecting pressure in tank is assembled on oil tank, and the sight glass with scale for observing the amount of lubricating oil in tank is assembled on oil tank.The utility model in the present application solves the problem that micro-positive pressure bearing box cannot be refueled online, and the pump can be refueled without stopping, to avoid production fluctuation and loss of income;Using original gas source branch pressure charging, without additional equipment, while gravity flow refueling avoids the impact of pressure injection on bearing box and the risk of shaft seal damage, to ensure the reliable operation of machine pump.

Description

Technical Field

[0001] This utility model belongs to the technical field of auxiliary devices for chemical equipment, specifically, it relates to a lubrication device for a pump micro-positive pressure bearing box. Background Technology

[0002] Currently, some pumps in the plant (such as Roots vacuum pumps) require an air supply to maintain a slight positive pressure in their bearing housings during normal operation to prevent cross-contamination between lubricating oil and materials. During normal pump operation, due to the slight positive pressure in the bearing housing, gas will flow out when the oil filler port on the bearing housing is opened, preventing normal oil replenishment. The pump must be shut down and the air supply turned off before oil can be replenished. To save costs, chemical plants typically do not have backup pumps when pumps that are not prone to damage are in operation, or the backup pumps are under maintenance or awaiting inspection. Replenishing oil after a pump shutdown can cause production fluctuations or reduced profits. Therefore, a system capable of online oil replenishment under slight positive pressure in the bearing housing needs to be designed.

[0003] No effective solutions have yet been proposed to address the problems in the relevant technologies.

[0004] Therefore, in order to solve the above problems, this utility model provides a lubrication device for a pump micro-positive pressure bearing housing. Utility Model Content

[0005] In order to overcome the above-mentioned technical problems, the purpose of this utility model is to provide a lubrication device for a pump micro-positive pressure bearing box.

[0006] The objective of this utility model can be achieved through the following technical solutions: A lubrication device for a pump bearing housing under micro-positive pressure, comprising: The pump is equipped with a bearing housing. A refueling tank is fixedly installed at a predetermined height above the bearing housing. A refueling funnel is connected to the top of the refueling tank, and a first valve is connected in series on the communication path between the refueling funnel and the refueling tank. The top of the refueling tank is also connected to a pressure relief bend, and a second valve is connected in series on the pressure relief bend; The refueling tank is equipped with a pressure gauge for detecting the pressure inside the tank, and a graduated sight glass for observing the amount of lubricating oil inside the tank. The main gas supply pipe is branched into a bearing housing micro-positive pressure gas supply line and a fuel tank pressurization line through a split connector. A pressure reducing valve is connected in series on the main gas supply pipe. The bearing housing micro-positive pressure gas supply line is connected to the inside of the bearing housing after being connected in series with a fourth valve and a check valve. The fuel tank pressurization line is connected to the inside of the fuel tank through a third valve connected in series. The bottom of the refueling tank is connected to the inside of the bearing housing via a fifth valve installed in series. A sight glass for observing the flow of lubricating oil is also installed on the line connecting the refueling tank and the bearing housing.

[0007] As a preferred embodiment of this utility model, the pressure relief bend has a U-shaped structure with its open end facing downwards.

[0008] As a preferred technical solution of this utility model, the graduated sight glass is installed on one side of the fuel tank along the vertical height direction, and its graduation marks correspond one-to-one with the internal volume gradient of the fuel tank.

[0009] As a preferred embodiment of this utility model, the conduction direction of the one-way valve is from the fourth valve to the bearing housing.

[0010] As a preferred embodiment of this utility model, the opening of the refueling funnel faces upward and its diameter is larger than the diameter of the top connecting opening of the refueling tank. A dust cover is detachably fitted to the opening of the refueling funnel.

[0011] As a preferred embodiment of this utility model, the bottom of the refueling tank has a conical structure, and the tip of the conical structure is oriented towards the path connecting with the bearing housing.

[0012] Compared with the prior art, the present invention has the following beneficial effects: This invention solves the problem of online oil replenishment for micro-positive pressure bearing housings, allowing oil replenishment without stopping the pump, thus avoiding production fluctuations and profit losses. It utilizes the existing air source branch for pressurization, eliminating the need for additional equipment. At the same time, gravity flow oil replenishment avoids the impact on the bearing housing and the risk of shaft seal damage caused by pressurized injection, ensuring reliable pump operation. The coordinated structure of each component improves the convenience, accuracy, and cleanliness of oil replenishment, ensuring the quality of lubricating oil and the efficiency of oil replenishment. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are 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.

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] Figure label: 1. Pump; 2. Bearing housing; 3. Oil tank; 31. Pressure gauge; 32. Sight glass with graduations; 4. Oil filling funnel; 5. First valve; 6. Second valve; 7. Third valve; 8. Pressure reducing valve; 9. Fourth valve; 10. Check valve; 11. Fifth valve; 12. Original oil filling port of bearing housing; 13. Sight glass; 14. Air supply main pipe; 141. Bearing housing micro-positive pressure air supply line; 142. Oil tank pressurization line; 15. Pressure relief bend. Detailed Implementation

[0016] The preferred embodiments of this utility model will now be described in detail with reference to the accompanying drawings, so that the advantages and features of this utility model can be more easily understood by those skilled in the art, thereby providing a clearer and more definite definition of the scope of protection of this utility model: Example: Please refer to Figure 1 According to an embodiment of this utility model, a micro-positive pressure bearing housing lubrication device for a pump includes: a pump 1, with a bearing housing 2 installed on the pump 1; a lubrication tank 3 is installed at a predetermined height above the bearing housing 2, the lubrication tank 3 being positioned at the predetermined height above the bearing housing 2, serving both to temporarily store lubricating oil and to achieve gravity flow lubrication by pressurizing and balancing with the bearing housing pressure, thus avoiding the risk of pressurized injection; a lubrication funnel 4 is connected to the top of the lubrication tank 3, and a first valve 5 is connected in series in the communication path between the lubrication funnel 4 and the lubrication tank 3. Valve 5 controls the opening and closing of the oil filling path to ensure controllable operation; the top of the oil tank 3 is also connected to a pressure relief bend 15, and a second valve 6 is connected in series on the pressure relief bend 15. The pressure relief bend 15 can realize pressure relief and dust prevention, and the second valve 6 can control the pressure relief process; the oil tank 3 is equipped with a pressure gauge 31 for detecting the pressure inside the tank, and a graduated sight glass 32 for observing the amount of lubricating oil in the tank. The pressure gauge 31 monitors the pressure of the oil tank 3 in real time to ensure pressure balance, and the graduated sight glass 32 enables accurate observation of the amount of lubricating oil.

[0017] Please see Figure 1 The main gas supply pipe 14 branches into a bearing housing micro-positive pressure gas supply line 141 and a fuel tank pressurization line 142 via a splitter connector. A pressure reducing valve 8 is connected in series on the main gas supply pipe 14. The bearing housing micro-positive pressure gas supply line 141 is connected to the bearing housing 2 via a fourth valve 9 and a one-way valve 10. The fuel tank pressurization line 142 is connected to the fuel tank 3 via a third valve 7. The main gas supply pipe 14 can supply gas to the bearing housing 2 and the fuel tank 3 simultaneously without an additional gas source, saving costs and ensuring pressure consistency. The pressure reducing valve 8 adjusts the gas supply to the design pressure to ensure micro-positive pressure and pressurization requirements. The fourth valve 9 of the bearing housing micro-positive pressure gas supply line 141 controls the gas supply, and the one-way valve 10 prevents backflow of the medium. The third valve 7 of the fuel tank pressurization line 142 controls the pressurization.

[0018] Please see Figure 1The bottom of the oil tank 3 is connected to the inside of the bearing housing 2 through a fifth valve 11. A sight glass 13 for observing the flow of lubricating oil is also installed on the line connecting the oil tank 3 and the bearing housing 2. The fifth valve 11 controls the opening and closing of the oil replenishment path, and the bearing housing sight glass 13 can observe the oil replenishment status to ensure normal operation.

[0019] Please see Figure 1 The pressure relief bend 15 has a U-shaped structure with its open end facing downwards to prevent external impurities from entering the interior of the refueling tank 3.

[0020] Please see Figure 1 A graduated sight glass 32 is installed on one side of the oil tank 3 along its vertical height. Its scale marks correspond one-to-one with the internal volume gradient of the oil tank 3, which can intuitively and accurately observe the amount of lubricating oil, improve the control accuracy of the amount of oil added, and avoid adding too much or too little oil.

[0021] Please see Figure 1 The one-way valve 10 is directed from the fourth valve 9 to the bearing housing 2, which is used to prevent gas or lubricating oil in the bearing housing 2 from flowing back to the gas source main pipe 14.

[0022] Please see Figure 1 The opening of the refueling funnel 4 faces upward, and its diameter is larger than the diameter of the top connecting opening of the refueling tank 3. A dust cover is detachably installed at the opening of the refueling funnel 4. The large diameter of the refueling funnel 4 improves the convenience of refueling, and the dust cover can block impurities.

[0023] Please see Figure 1 The bottom of the oil tank 3 has a conical structure, with the tip of the conical structure facing the path connecting to the bearing housing 2. The conical structure guides the lubricating oil to converge at the connection port, reducing residue, improving the utilization rate of lubricating oil, and ensuring smooth oil replenishment.

[0024] The working principle of a micro-positive pressure bearing housing lubrication device for a pump is as follows: When lubrication is required, first open valve 6 to release the pressure of the lubrication tank 3 to 0 (check the pressure through pressure gauge 31), then close valve 6, open valve 5 and confirm that valve 11 is closed, add lubricating oil to the lubrication tank 3 through the lubrication funnel 4, observe the graduated sight glass 32 to add to the required oil level, then close valve 5, open valve 7, and the air source enters the lubrication tank 3 for pressurization. Observe through pressure gauge 31, when the pressure is consistent with the bearing housing pressure and the pressure on pressure gauge 31 is stable, slowly open valve 11. Since the pressure is consistent, the lubricating oil flows into the bearing housing due to its own gravity. Observe through sight glasses 32 and 13 to confirm that the lubricating oil is flowing normally into the bearing housing. After the lubrication is completed, close valve 11, then close valve 7, open valve 6, and depressurize the lubrication tank.

[0025] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] 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 utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A lubrication device for a pump bearing housing under micro-positive pressure, characterized in that: include: Pump (1), the pump (1) is equipped with a bearing housing (2); A refueling tank (3) is fixedly installed at a preset height above the bearing housing (2). The top of the refueling tank (3) is connected to a refueling funnel (4). A first valve (5) is connected in series on the communication path between the refueling funnel (4) and the refueling tank (3). The top of the refueling tank (3) is also connected to a pressure relief bend (15), and a second valve (6) is connected in series on the pressure relief bend (15). The refueling tank (3) is equipped with a pressure gauge (31) for detecting the pressure inside the tank, and a graduated sight glass (32) for observing the amount of lubricating oil inside the tank. The main gas supply pipe (14) is branched into a bearing housing micro-positive pressure gas supply line (141) and a fuel tank pressurization line (142) through a split connector. A pressure reducing valve (8) is connected in series on the main gas supply pipe (14). The bearing housing micro-positive pressure gas supply line (141) is connected to the bearing housing (2) after being connected in series with a fourth valve (9) and a one-way valve (10). The fuel tank pressurization line (142) is connected to the fuel tank (3) through a third valve (7). The bottom of the oil tank (3) is connected to the inside of the bearing housing (2) through a fifth valve (11) connected in series. A sight glass (13) for observing the flow of lubricating oil is also installed on the line connecting the oil tank (3) and the bearing housing (2).

2. The lubrication device for a pump bearing housing under micro-positive pressure according to claim 1, characterized in that, The pressure relief bend (15) has a U-shaped structure with its open end facing downwards.

3. The lubrication device for a pump bearing housing under micro-positive pressure according to claim 1, characterized in that, The graduated sight glass (32) is installed on one side of the fuel tank (3) along the vertical height direction, and its scale marks correspond one-to-one with the internal volume gradient of the fuel tank (3).

4. The lubrication device for a pump bearing housing under micro-positive pressure according to claim 1, characterized in that, The one-way valve (10) is directed from the fourth valve (9) toward the bearing housing (2).

5. The lubrication device for a pump bearing housing under micro-positive pressure according to claim 1, characterized in that, The opening of the refueling funnel (4) is set facing upward, and its diameter is larger than the diameter of the top connecting opening of the refueling tank (3). A dust cover is detachably installed at the opening of the refueling funnel (4).

6. The lubrication device for a pump bearing housing under micro-positive pressure according to claim 1, characterized in that, The bottom of the refueling tank (3) is conical, and the tip of the conical structure is set towards the path direction that connects with the bearing housing (2).

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