Centrifugal pump for mechanical seal lubrication

Abstract

The utility model discloses a centrifugal pump for mechanical seal lubrication, and relates to the technical field of centrifugal pumps. The top of the oil can is fixedly connected with an oil conveying pipe, one end of the connecting pipe is fixedly connected with a liquid level pipe, the top of the liquid level pipe is fixedly connected with a liquid level annunciator, and lubricating oil contained in the oil can enters an inner cavity of the main pump body from the interior of the oil filling port; and the surface of the bearing is uniformly covered, so that the friction force generated between the bearing and the inner cavity of the main pump body during rotation is reduced, the bearing is prevented from being damaged, and the service life of the centrifugal pump is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of centrifugal pumps, in particular to a mechanically sealed and lubricated centrifugal pump. Background Art

[0002] Centrifugal pumps come in a variety of styles, including vertical, horizontal, single-stage, multi-stage, single-suction, double-suction, and self-priming. Centrifugal pumps work by using the centrifugal motion of water caused by the rotation of the impeller. Before starting the pump, the pump casing and suction pipe must be filled with water. Then, the motor is started, causing the pump shaft to drive the impeller and water into high-speed rotation. The water undergoes centrifugal motion and is flung toward the outer edge of the impeller, flowing through the flow channel of the volute pump casing into the water pressure line of the water pump. Existing centrifugal pumps use mechanical seals to seal the shaft connection. If lubricating oil is not added during use, the friction between the shaft and the pump body increases when the shaft rotates, causing damage to the shaft and shortening the service life of the centrifugal pump. Utility Model Content

[0003] In response to the deficiencies of the prior art, the utility model provides a centrifugal pump with mechanical seal lubrication, which solves the problem that the existing centrifugal pump seals the shaft connection through a mechanical seal, but if no lubricating oil is added for lubrication during use, the friction between the shaft and the pump body increases when the shaft rotates, causing damage to the shaft and shortening the service life of the centrifugal pump.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solution: a centrifugal pump with mechanical seal lubrication, comprising a pump body assembly, one end of which is provided with a lubrication assembly, the lubrication assembly including an oil pot, the top of which is fixedly connected to an oil delivery pipe, the side of which is fixedly connected to a connecting pipe, one end of which is fixedly connected to a liquid level pipe, and the top of which is fixedly connected to a liquid level signaler.

[0005] Preferably, the pump body assembly includes a main pump body, a feed port is opened at one end of the main pump body, a coupling is movably connected to the other end of the main pump body, a bearing is movably connected to one end of the inner cavity of the main pump body, a connecting shaft is fixedly connected to the side of the bearing, an impeller is sleeved on one end of the connecting shaft, and a motor is fixedly connected to one end of the coupling.

[0006] Preferably, a discharge port is provided at the top of the main pump body, a refueling port is provided at one end of the top of the main pump body, and a base is fixedly connected to the bottom of the main pump body and the motor.

[0007] Preferably, a water pump is fixedly connected to the bottom of the oil pipeline, an oil tank is fixedly connected to the bottom of the base, the water pump is fixedly connected to the top of the base, and a water pipe arranged at the bottom of the water pump passes through the top of the base and is connected to the oil tank fixedly connected to the bottom of the base.

[0008] Preferably, the oil pot is arranged in parallel with the liquid level pipe, and connecting pipes are provided at both ends of the liquid level pipe, and the oil pot and the liquid level pipe are connected through the connecting pipes.

[0009] Preferably, the top of the fuel filling port is fixedly connected to the bottom of the oil pot.

[0010] Preferably, one end of the coupling passes through the side surface of the main pump body and is fixedly connected to the bearing at one end of the inner cavity of the main pump body.

[0011] The utility model provides a centrifugal pump with mechanical seal lubrication. Compared with the prior art, it has the following advantages:

[0012] 1. A centrifugal pump with mechanical seal lubrication, the lubricating oil contained in the oil pot enters the inner cavity of the main pump body from the inside of the refueling port. When the motor drives the bearing to rotate, the lubricating oil will be evenly covered on the surface of the bearing due to the rotation of the bearing, reducing the friction between the bearing and the inner cavity of the main pump body when rotating, avoiding damage to the bearing and extending the service life of the centrifugal pump.

[0013] 2. A centrifugal pump with mechanical seal lubrication, through a liquid level tube parallel to the oil pot, the lubricating oil contained in the oil pot is consistent in height with the lubricating oil in the liquid level tube. When the height of the lubricating oil in the liquid level tube drops, it indicates that the amount of lubricating oil in the oil pot is gradually decreasing due to use. When the liquid level signal device set on the top of the liquid level tube detects that the liquid level of the lubricating oil in the liquid level tube is insufficient, lubricating oil is added to the interior of the oil pot through a water pump to avoid the lack of oil in the oil pot during use, which makes it impossible to lubricate the internal bearings. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the structure of the pump assembly of the utility model;

[0016] Figure 3 This is a schematic diagram of the structure of the lubrication component of the utility model;

[0017] Figure 4 It is a side structural diagram of the utility model.

[0018] In the figure: 1. Pump body assembly; 2. Lubrication assembly; 11. Main pump body; 12. Feed inlet; 13. Impeller; 14. Connecting shaft; 15. Bearing; 16. Refueling port; 17. Discharge port; 18. Motor; 19. Coupling; 110. Base; 21. Oil pot; 22. Oil pipeline; 23. Liquid level pipe; 24. Liquid level signaler; 25. Connecting pipe; 26. Water pump; 27. Oil tank. DETAILED DESCRIPTION

[0019] 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. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] See also Figure 1-4 The utility model provides a technical solution: a centrifugal pump with mechanical seal lubrication. The utility model comprises a pump body assembly 1, a lubrication assembly 2 is provided at one end of the pump body assembly 1, the lubrication assembly 2 comprises an oil pot 21, the oil pot 21 is used to hold lubricating oil, the top of the oil pot 21 is fixedly connected to an oil delivery pipe 22, the oil delivery pipe 22 is used to add oil to the oil pot 21 from the inside of the oil tank 27 through a water pump 26, a connecting pipe 25 is fixedly connected to the side of the oil pot 21, one end of the connecting pipe 25 is fixedly connected to a liquid level pipe 23, the top of the liquid level pipe 23 is fixedly connected to a liquid level signaler 24, the connecting pipe 25 can balance the oil amount between the oil pot 21 and the liquid level pipe 23, so that the lubricating oil levels inside the oil pot 21 and the liquid level pipe 23 are the same, the liquid level signaler 24 uses the principle of reflection and refraction of light at the interface between two different media to measure the liquid level of the lubricating oil inside the liquid level pipe 23, when the liquid level inside the liquid level pipe 23 is lower than the set value, the information is transmitted to the control end to control the water pump 26 to add oil to the inside of the oil pot 21.

[0021] See also Figure 1-2 4. The pump assembly 1 includes a main pump body 11. A feed port 12 is provided at one end of the main pump body 11. A coupling 19 is movably connected to the other end of the main pump body 11. The coupling 19 is a mechanical device for connecting two shaft ends or a shaft and a rotating member to transmit torque. Its main function is to transmit motion and torque from one end to the other end, and to compensate for the offset of the two axes to a certain extent. The direction and torque are not changed during the transmission process. A bearing 15 is movably connected to one end of the inner cavity of the main pump body 11. A connecting shaft 14 is fixedly connected to the side of the bearing 15. An impeller 13 is sleeved on one end of the connecting shaft 14. The impeller 13 is mainly The main function is to transfer mechanical energy to the liquid, so as to increase the mechanical energy, pressure and speed of the liquid. The main function of the main pump body 11 is to collect the liquid thrown out by the impeller 13, and convert part of the kinetic energy of the liquid thrown out by the impeller 13 into pressure energy and then discharge it from the discharge port 17. One end of the coupling 19 is fixedly connected to the motor 18, and the top of the main pump body 11 is provided with a discharge port 17. The top end of the main pump body 11 is provided with a refueling port 16. The bottom of the main pump body 11 and the motor 18 are fixedly connected with a base 110. One end of the coupling 19 passes through the side of the main pump body 11 and is fixedly connected to one end of the inner cavity of the main pump body 11 with the bearing 15.

[0022] See also Figure 1-4 The bottom of the oil pipe 22 is fixedly connected to a water pump 26, the bottom of the base 110 is fixedly connected to an oil tank 27, the water pump 26 is fixedly connected to the top of the base 110, and the water pipe arranged at the bottom of the water pump 26 passes through the top of the base 110 and is connected to the oil tank 27 fixedly connected to the bottom of the base 110. The oil pot 21 is arranged parallel to the liquid level pipe 23. This arrangement can keep the liquid levels of the lubricating oil in the oil pot 21 and the liquid level pipe 23 flush under the action of air pressure. Connecting pipes 25 are provided at both ends of the liquid level pipe 23. The oil pot 21 and the liquid level pipe 23 are connected through the connecting pipes 25, and the top of the refueling port 16 is fixedly connected to the bottom of the oil pot 21.

[0023] During use, the lubricating oil contained in the oil pot 21 is consistent with the height of the lubricating oil in the liquid level tube 23 through the liquid level tube 23 which is parallel to the oil pot 21. When the height of the lubricating oil in the liquid level tube 23 drops, it indicates that the amount of lubricating oil in the oil pot 21 is gradually decreasing due to use. When the liquid level signaler 24 arranged on the top of the liquid level tube 23 detects that the liquid level of the lubricating oil in the liquid level tube 23 is insufficient, lubricating oil is added to the interior of the oil pot 21 through the water pump 26, and the lubricating oil enters one end of the inner cavity of the main pump body 11 through the refueling port 16. When the motor 18 drives the bearing 15 to rotate, the lubricating oil will be evenly covered on the surface of the bearing 15 due to the rotation of the bearing 15, thereby reducing the friction between the bearing 15 and the inner cavity of the main pump body 11 when it rotates, thereby avoiding damage to the bearing 15.

[0024] In this embodiment, a centrifugal pump with mechanical seal lubrication is used. Among the above components, its structural features and working principles all adopt the existing technology and will not be described in detail here.

[0025] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0026] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A centrifugal pump with mechanical seal lubrication, comprising a pump body assembly (1), characterized in that: A lubrication assembly (2) is provided at one end of the pump body assembly (1); The lubrication assembly (2) comprises an oil pot (21), the top of the oil pot (21) is fixedly connected to an oil delivery pipe (22), the side of the oil pot (21) is fixedly connected to a connecting pipe (25), one end of the connecting pipe (25) is fixedly connected to a liquid level pipe (23), and the top of the liquid level pipe (23) is fixedly connected to a liquid level signaler (24); The pump body assembly (1) includes a main pump body (11), one end of the main pump body (11) is provided with a feed port (12), the other end of the main pump body (11) is movably connected to a coupling (19), one end of the inner cavity of the main pump body (11) is movably connected to a bearing (15), the side of the bearing (15) is fixedly connected to a connecting shaft (14), one end of the connecting shaft (14) is sleeved with an impeller (13), and one end of the coupling (19) is fixedly connected to a motor (18).

2. A centrifugal pump with mechanical seal lubrication according to claim 1, characterized in that: A discharge port (17) is provided at the top of the main pump body (11), a refueling port (16) is provided at one end of the top of the main pump body (11), and a base (110) is fixedly connected to the bottom of the main pump body (11) and the motor (18).

3. A centrifugal pump with mechanical seal lubrication according to claim 2, characterized in that: The bottom of the oil delivery pipe (22) is fixedly connected to a water pump (26), the bottom of the base (110) is fixedly connected to an oil tank (27), the water pump (26) is fixedly connected to the top of the base (110), and a water pipe provided at the bottom of the water pump (26) passes through the top of the base (110) and is connected to the oil tank (27) fixedly connected to the bottom of the base (110).

4. A centrifugal pump with mechanical seal lubrication according to claim 1, characterized in that: The oil pot (21) and the liquid level pipe (23) are arranged in parallel, and connecting pipes (25) are provided at both ends of the liquid level pipe (23). The oil pot (21) and the liquid level pipe (23) are connected via the connecting pipes (25).

5. A centrifugal pump with mechanical seal lubrication according to claim 2, characterized in that: The top of the refueling port (16) is fixedly connected to the bottom of the oil pot (21).

6. A centrifugal pump with mechanical seal lubrication according to claim 1, characterized in that: One end of the coupling (19) passes through the side surface of the main pump body (11) and is fixedly connected to the bearing (15) at one end of the inner cavity of the main pump body (11).

Images