Centrifugal pump with impeller sealing device

Abstract

The utility model discloses a centrifugal pump with an impeller sealing device, which comprises a motor, one side of the motor is fixedly provided with a protection seat, one side of the protection seat is fixedly provided with a pump cover, an output shaft of the motor sequentially penetrates through the protection seat and the pump cover and is fixedly connected with an impeller, and one side of the pump cover is fixedly provided with a pump shell. According to the utility model, through the arrangement of the oiling assembly, when the surface of the output shaft of the motor needs to be lubricated, the cap is firstly screwed off, lubricating oil is added into the oil storage tank, and when the lubricating oil is added, the cap is screwed back, and the oil storage tank is closed; lubricating oil flows to the surface of the motor output shaft through the oil guide hole, so that the surface of the motor output shaft is lubricated and prevented from rusting, and the service life of the centrifugal pump is greatly prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of centrifugal pump equipment, in particular to a centrifugal pump with an impeller sealing device. Background Art

[0002] Centrifugal pumps are used to transport liquids. They are transporting equipment that transports liquids through the centrifugal force generated by the internal impeller. Sealing equipment is often required when the pump shaft and impeller of the centrifugal pump are connected to prevent the flow of liquid inside and outside the seal.

[0003] The Chinese patent with the publication number CN210715121U discloses a centrifugal pump, including a motor, a pump body, and a valve body. The motor is connected to the pump shaft in the pump body, an impeller is installed at one end of the pump shaft, a static ring and a dynamic ring are arranged on the inner side of the impeller in sequence, a pump housing and a connecting seat are arranged on the outside of the impeller, the connecting seat and the motor are fixed by bolts, the pump body is connected to the valve body through a first optical connector, the valve body is connected to a second optical connector, a cylinder is arranged in the valve body, a sealing plate is arranged at the lower end of the cylinder, the valve body is connected to the first optical connector through a first pipe nut, the valve body is connected to the second optical connector through a second pipe nut, and an O-ring is arranged between the pump housing and the connecting seat. The centrifugal pump has a simple structure, a scientific and reasonable design, a more balanced and smooth operation of the impeller, a good end face sealing effect, no water leakage occurs in the pump body during the water pressure process, and the leakage volume still meets the standard well under the condition of idling.

[0004] The above-mentioned centrifugal pump still has some problems in use. Although the structure is simple, the design is scientific and reasonable, the impeller runs more balanced and smoothly, and the end face sealing effect is good, most centrifugal pumps are in a humid environment, and the pump shaft requires regular maintenance to prevent rust. In addition, when the pump shaft rotates inside the connecting seat for a long time, there may be a lack of lubrication between the pump shaft and the connecting seat, which increases the friction and affects the rotation of the pump shaft. Utility Model Content

[0005] The utility model aims to provide a centrifugal pump with an impeller sealing device to solve the problem in the above background technology that when the pump shaft rotates inside the connecting seat for a long time, lack of lubrication between the pump shaft and the connecting seat may increase friction and affect the rotation of the pump shaft.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A centrifugal pump with an impeller sealing device comprises a motor, a protection seat is fixedly mounted on one side of the motor, a pump cover is fixedly mounted on one side of the protection seat, an output shaft of the motor passes through the protection seat and the pump cover in sequence and is fixedly connected to an impeller, a pump housing is fixedly mounted on one side of the pump cover, and an oiling assembly for lubricating the motor shaft is arranged above the protection seat;

[0008] The refueling assembly includes an oil storage tank installed above the protective seat, a refueling hole is provided on the top surface of the oil storage tank, a cap is threadedly connected to the inner cavity of the refueling hole, an oil guide hole is provided downwardly through one side of the protective seat located above, and a liquid inlet of the oil guide hole is connected to the inner cavity of the oil storage tank.

[0009] Preferably, a mechanical seal is embedded on one side surface of the pump cover, the motor output shaft is fixedly connected to the inner ring of the mechanical seal, and an O-ring is clamped on the inner ring of the other end of the pump cover.

[0010] Preferably, a connecting rod is threadedly connected to the top surface of the oil storage tank, one end of the connecting rod passes through the oil storage tank and is fixedly connected to a conical block, the upper mouth of the oil guide hole and the conical block are arranged in a corresponding conical shape, the conical block is inserted into the upper mouth of the oil guide hole, and the other end of the connecting rod is fixedly connected to a turntable.

[0011] Preferably, an oil guide groove is provided on the surface of the output shaft of the motor, and the oil guide hole and the oil guide groove are in the same horizontal plane.

[0012] Preferably, an oil float is slidably connected to the surface of the oil storage tank, and the oil in the oil float is in the inner cavity of the oil storage tank.

[0013] Preferably, a support block is fixedly mounted on the bottom surface of the pump cover, a mounting seat is fixedly mounted on the bottom of the motor, and the bottom of the support block is slidably connected to the top surface of the mounting seat.

[0014] Preferably, a connecting plate is fixedly installed on the surface of the pump casing, and a connecting block is fixedly installed on the surface of the pump cover and at a position corresponding to the connecting plate. A first bolt is slidably connected to the surface of the connecting plate, one end of the first bolt penetrates the pump casing in turn and is threadedly connected to the surface of the pump cover, and a second bolt is slidably connected to the surface of the protective seat, one end of the second bolt penetrates the protective seat and is threadedly connected to the surface of the pump cover.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. The utility model is provided with a refueling assembly. When the surface of the output shaft of the motor needs to be lubricated, the cap is first unscrewed and lubricating oil is added to the oil storage tank. When the adding is completed, the cap is screwed back to seal the oil storage tank. The lubricating oil flows to the surface of the motor output shaft through the oil guide hole, thereby lubricating the surface of the motor output shaft and preventing the surface of the motor output shaft from rusting, thereby greatly extending the service life of the centrifugal pump.

[0017] 2. The utility model arranges a turntable and a connecting rod, rotates the turntable, thereby driving one end of the connecting rod to move upward, thereby controlling the upward movement distance of the conical block, adjusting the opening area of ​​the oil guide hole, and controlling the flow rate of the lubricating oil to the surface of the motor output shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural schematic diagram of a centrifugal pump with an impeller sealing device according to the utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the utility model after explosion;

[0020] Figure 3 It is a schematic structural diagram of a cross-section of the protection seat of the utility model.

[0021] In the figure: 100, pump casing; 101, pump cover; 102, first bolt; 103, second bolt; 104, support block; 105, mounting seat; 106, motor; 107, protection seat; 108, rubber strip; 109, groove; 110, connecting plate; 111, connecting block; 112, O-ring; 113, waterproof bearing; 200, impeller; 201, third bolt; 202, cap; 203, connecting rod; 204, oil float; 206, tapered block; 207, oil guide hole; 208, oil guide groove; 209, refueling hole; 210, oil storage tank; 211, mechanical seal; 212, turntable. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-3 The present embodiment provides a centrifugal pump with an impeller sealing device, including a motor 106, a protective seat 107 is fixedly installed on one side of the motor 106, a waterproof bearing 113 is inlaid on one side of the protective seat 107, a pump cover 101 is fixedly installed on one side of the protective seat 107, an output shaft of the motor 106 passes through the protective seat 107, the waterproof bearing 113 and the pump cover 101 in sequence and is fixedly connected with an impeller 200, the impeller 200 is fixedly installed with the output shaft of the motor 106 by a third bolt 201, a pump housing 100 is fixedly installed on one side of the pump cover 101, and an oiling assembly for lubricating the shaft of the motor 106 is provided above the protective seat 107;

[0024] Furthermore, the refueling assembly includes an oil storage tank 210 installed above the protective seat 107, and a refueling hole 209 is provided on the top surface of the oil storage tank 210. The inner cavity of the refueling hole 209 is threadedly connected with a cap 202. The protective seat 107 is located on the upper side and is provided with an oil guide hole 207 extending downward therethrough. The liquid inlet of the oil guide hole 207 is connected to the inner cavity of the oil storage tank 210. Through the setting of the refueling assembly, when it is necessary to lubricate the output shaft surface of the motor 106, first unscrew the cap 202 and add lubricating oil to the oil storage tank 210. When the adding is completed, screw back the cap 202 and close the oil storage tank 210. The lubricating oil flows through the oil guide hole 207 to the surface of the output shaft of the motor 106, thereby lubricating the surface of the output shaft of the motor 106 and preventing the surface of the output shaft of the motor 106 from rusting, thereby greatly extending the service life of the centrifugal pump.

[0025] Furthermore, a mechanical seal 211 is embedded on one side surface of the pump cover 101, wherein the mechanical seal 211 is a prior art and constitutes an impeller sealing device, wherein the mechanical seal 211 is composed of a dynamic ring, a static ring, a sealing ring, a spring, a push ring, etc., and other details are not elaborated on. The output shaft of the motor 106 is fixedly connected to the inner ring of the mechanical seal 211, and the inner ring of the other end of the pump cover 101 is clamped with an O-ring 112. The mechanical seal 211 is arranged to prevent liquid from leaking out of the gap between the output shaft of the motor 106 and the pump cover 101.

[0026] It is worth mentioning that the top surface of the oil storage tank 210 is threadedly connected with a connecting rod 203, one end of the connecting rod 203 passes through the oil storage tank 210 and is fixedly connected with a conical block 206, the upper mouth of the oil guide hole 207 and the conical block 206 are set in a corresponding conical shape, the conical block 206 is inserted into the upper mouth of the oil guide hole 207, and the other end of the connecting rod 203 is fixedly connected with a turntable 212. Through the setting of the turntable 212 and the connecting rod 203, the turntable 212 is rotated, thereby driving one end of the connecting rod 203 to move upward, thereby controlling the upward movement distance of the conical block 206, and adjusting the opening area of ​​the oil guide hole 207, thereby controlling the flow rate of the lubricating oil to the output shaft surface of the motor 106.

[0027] Preferably, an oil guide groove 208 is provided on the surface of the output shaft of the motor 106, and the oil guide hole 207 and the oil guide groove 208 are in the same horizontal plane. Through the setting of the oil guide groove 208, the lubricating liquid flows through the oil guide hole 207 to the inner cavity of the oil guide groove 208 provided on the surface of the output shaft of the motor 106, and lubricates the surface of the output shaft of the motor 106 under the centrifugal force of the output shaft of the motor 106.

[0028] Furthermore, the surface of the oil storage tank 210 is slidably connected with an oil float 204, and the oil of the oil float 204 is in the inner cavity of the oil storage tank 210. Through the setting of the oil float 204, the amount of lubricating oil contained in the oil storage tank 210 can be intuitively checked.

[0029] Preferably, a support block 104 is fixedly mounted on the bottom surface of the pump cover 101, and a mounting seat 105 is fixedly mounted on the bottom of the motor 106. The bottom of the support block 104 is slidably connected to the top surface of the mounting seat 105. By setting the support block 104, the pump cover 101 is positioned when installed, and part of the force applied to the pump housing 100 is dispersed to the mounting seat 105, thereby increasing the force range of the pump housing 100.

[0030] Furthermore, a connecting plate 110 is fixedly installed on the surface of the pump housing 100, a connecting block 111 is fixedly installed on the surface of the pump cover 101 and at a position corresponding to the connecting plate 110, a first bolt 102 is slidably connected to the surface of the connecting plate 110, one end of the first bolt 102 passes through the pump housing 100 in turn and is threadedly connected to the surface of the pump cover 101, and a rubber strip 108 is fixedly installed on one side surface of the pump housing 100, a corresponding groove 109 is opened on one side surface of the pump cover 101, and the surface of the protective seat 107 A second bolt 103 is slidably connected, one end of the second bolt 103 passes through the protective seat 107 and is threadedly connected to the surface of the pump cover 101. By setting the first bolt 102, the first bolt 102 and the second bolt 103 are disassembled, so that the staff can dismantle the pump casing 100 and the pump cover 101, and the staff can inspect the impeller 200 and the bearing. The rubber sleeve is inserted into the inner cavity of the groove 109 to seal the gap between the pump casing 100 and the pump cover 101, thereby improving the airtightness of the centrifugal pump.

[0031] Working principle:

[0032] When the surface of the output shaft of the motor 106 needs to be lubricated when used for a long time, the cap 202 is first unscrewed and the lubricating oil is adjusted into the oil storage tank 210. When the addition is completed, the cap 202 is screwed back to close the oil storage tank 210, and then the turntable 212 is turned to move the connecting rod 203 upward, so that the conical block 206 moves upward to release the blockage of the oil guide hole 207, so that the lubricating liquid flows through the oil guide hole 207 to the inner cavity of the oil guide groove 208 opened on the surface of the output shaft of the motor 106, and under the rotation of the output shaft of the motor 106, it flows evenly to the surface of the output shaft of the motor 106, thereby lubricating the surface of the output shaft of the motor 106 to prevent rust, and the opening area of ​​the oil guide hole 207 can be adjusted by controlling the distance that the conical block 206 moves upward, so as to control the flow rate of the lubricating oil to the surface of the output shaft of the motor 106.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A centrifugal pump with an impeller sealing device, characterized in that: The invention comprises a motor (106), a protection seat (107) is fixedly mounted on one side of the motor (106), a pump cover (101) is fixedly mounted on one side of the protection seat (107), an output shaft of the motor (106) passes through the protection seat (107) and the pump cover (101) in sequence and is fixedly connected to an impeller (200), a pump housing (100) is fixedly mounted on one side of the pump cover (101), and an oiling assembly for lubricating the shaft of the motor (106) is arranged above the protection seat (107); The refueling assembly comprises an oil storage tank (210) installed above the protective seat (107); a refueling hole (209) is provided on the top surface of the oil storage tank (210); a cap (202) is threadedly connected to the inner cavity of the refueling hole (209); an oil guide hole (207) is provided on one side of the protective seat (107) located above and extending downward; and a liquid inlet of the oil guide hole (207) is communicated with the inner cavity of the oil storage tank (210).

2. A centrifugal pump with an impeller sealing device according to claim 1, characterized in that; A mechanical seal (211) is embedded on one side surface of the pump cover (101), the output shaft of the motor (106) is fixedly connected to the inner ring of the mechanical seal (211), and an O-ring (112) is clamped on the inner ring of the other end of the pump cover (101).

3. A centrifugal pump with an impeller sealing device according to claim 1, characterized in that: A connecting rod (203) is threadedly connected to the top surface of the oil storage tank (210); one end of the connecting rod (203) passes through the oil storage tank (210) and is fixedly connected to a conical block (206); the upper opening of the oil guide hole (207) and the conical block (206) are arranged in a corresponding conical shape; the conical block (206) is inserted into the upper opening of the oil guide hole (207); and the other end of the connecting rod (203) is fixedly connected to a rotating disk (212).

4. A centrifugal pump with an impeller sealing device according to claim 3, characterized in that: An oil guide groove (208) is provided on the surface of the output shaft of the motor (106), and the oil guide hole (207) and the oil guide groove (208) are located in the same horizontal plane.

5. A centrifugal pump with an impeller sealing device according to claim 3, characterized in that: The surface of the oil storage tank (210) is slidably connected to an oil float (204), and the oil in the oil float (204) is located in the inner cavity of the oil storage tank (210).

6. A centrifugal pump with an impeller sealing device according to claim 1, characterized in that: A support block (104) is fixedly mounted on the bottom surface of the pump cover (101), a mounting seat (105) is fixedly mounted on the bottom of the motor (106), and the bottom of the support block (104) is slidably connected to the top surface of the mounting seat (105).

7. A centrifugal pump with an impeller sealing device according to claim 6, characterized in that: A connecting plate (110) is fixedly mounted on the surface of the pump housing (100); a connecting block (111) is fixedly mounted on the surface of the pump cover (101) and at a position corresponding to the connecting plate (110); a first bolt (102) is slidably connected to the surface of the connecting plate (110); one end of the first bolt (102) penetrates the pump housing (100) in sequence and is threadedly connected to the surface of the pump cover (101); a second bolt (103) is slidably connected to the surface of the protection seat (107); one end of the second bolt (103) penetrates the protection seat (107) and is threadedly connected to the surface of the pump cover (101).

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