Centrifugal pump with friction-resistant rigid coupling

Abstract

The centrifugal pump with the friction-resistant rigid coupler comprises a bottom plate, a motor shaft and a pump shaft, connecting bases and connecting covers are attached to the ends, close to each other, of the motor shaft and the pump shaft, and the connecting bases are fixedly connected with the corresponding connecting covers through two symmetrically-arranged connecting assemblies. The ends, close to each other, of the two connecting bases are fixedly connected with a first coupling and a second coupling respectively, the sides, close to each other, of the first coupling and the second coupling are fixedly connected with a second coupling petal and a first coupling petal respectively, the second coupling petal and the first coupling petal are connected in a matched and inserted mode, and an interlayer pad is arranged between the first coupling petal and the second coupling petal. The connecting assembly comprises two connecting plates and two anti-loosening assemblies symmetrically arranged at the bottom of the lower connecting plate. By means of the structure, friction abrasion between the first coupling and the second coupling can be reduced by arranging the interlayer pad, the fastening force of the nut is guaranteed by arranging the anti-loosening assembly, and the reliability and stability of operation of the centrifugal pump are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of centrifugal pumps, in particular to a centrifugal pump with a friction-resistant rigid coupling. Background Art

[0002] A centrifugal pump is a common fluid conveying equipment widely used in various industrial fields. It refers to a pump that transports liquid by the centrifugal force generated by the rotation of the impeller. By starting the motor, the pump shaft drives the impeller and water to rotate at high speed. The water undergoes centrifugal motion and is thrown to the outer edge of the impeller and flows into the water pressure pipeline of the water pump through the flow channel of the volute pump casing.

[0003] During the operation of the centrifugal pump, the coupling, as a key component connecting the motor and the pump, plays an important role in transmitting torque and ensuring the accuracy of the two shafts. However, the existing couplings for centrifugal pumps are prone to performance degradation and shortened life due to friction and wear during long-term use. At the same time, the existing couplings are often connected using multiple sets of bolts, and the continuous vibration generated by the operation of the centrifugal pump may cause the tightening force of the bolts to weaken. If the bolts become loose during the operation of the equipment, it is easy to affect the reliability and stability of the centrifugal pump. Therefore, those skilled in the art provide a centrifugal pump with a friction-resistant rigid coupling to solve the problems raised in the above background technology. Utility Model Content

[0004] The utility model aims to provide a centrifugal pump with a friction-resistant rigid coupling, wherein the friction and wear between the first coupling and the second coupling can be reduced by arranging a sandwich pad, and an anti-loosening component is arranged to ensure the tightening force of the nut, thereby improving the reliability and stability of the operation of the centrifugal pump.

[0005] To achieve the above-mentioned purpose, a centrifugal pump with a friction-resistant rigid coupling is provided, comprising a base plate, a motor shaft and a pump shaft, wherein the motor shaft and the pump shaft are both fitted with a connection seat and a connection cover at the ends close to each other, and the connection seat and the corresponding connection cover are fixedly connected by two symmetrically arranged connection components, and the ends close to the two connection seats are respectively fixedly connected with a first coupling and a second coupling, and the sides close to the first coupling and the second coupling are respectively fixedly connected with a second coupling petal and a first coupling petal, and the second coupling petal is plugged in with the first coupling petal, and a sandwich pad is provided between the first coupling petal and the second coupling petal;

[0006] The connection assembly includes two connection plates and two anti-loosening assemblies symmetrically arranged at the bottom of the lower connection plate.

[0007] According to the centrifugal pump with a friction-resistant rigid coupling, the connection assembly also includes two bolts symmetrically inserted into the two connection plates and two nuts threadedly connected to the bottom of the bolts, and the anti-loosening assembly is cooperatively connected to the nuts.

[0008] According to the centrifugal pump with a friction-resistant rigid coupling, the anti-loosening assembly includes a second fixed plate and a first fixed plate fixedly connected to the bottom and one side of the connecting plate, a positioning rod slidably connected to the inside of the second fixed plate, and a pin threadedly connected to the inside of the first fixed plate, one end of the positioning rod close to the nut is in contact with the outer side of the nut, and the pin is plugged into the other end of the positioning rod.

[0009] According to the centrifugal pump with a friction-resistant rigid coupling, a buffer pad is fixedly connected to the bottom of the base plate.

[0010] According to the centrifugal pump with a friction-resistant rigid coupling, the interlayer pad and the buffer pad are both made of rubber.

[0011] According to the centrifugal pump with a friction-resistant rigid coupling, the outer sides of the motor shaft and the pump shaft are both provided with connecting keys, and the interior of the connecting cover is provided with a keyway that cooperates with the connecting key.

[0012] The utility model has the following beneficial effects:

[0013] 1. Compared with the prior art, the centrifugal pump with a friction-resistant rigid coupling can complete the connection between the motor shaft and the pump shaft by plugging the second coupling petal of the first coupling with the first coupling petal of the second coupling, thereby realizing power transmission, and a sandwich pad is arranged between the second coupling petal and the first coupling petal to reduce the friction and wear between the first coupling and the second coupling, thereby improving the service life and stability of the centrifugal pump;

[0014] 2. Compared with the prior art, this centrifugal pump with a friction-resistant rigid coupling can ensure the tightening force of the nut by setting an anti-loosening component for fixing the nut in the connecting component, prevent the nut from loosening during the operation of the centrifugal pump and affect the connection effect, thereby improving the reliability of the operation of the centrifugal pump.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further described below in conjunction with the accompanying drawings and embodiments;

[0017] Figure 1 This is a first overall structural schematic diagram of a centrifugal pump with a friction-resistant rigid coupling according to the utility model;

[0018] Figure 2 This is a second overall structural schematic diagram of a centrifugal pump with a friction-resistant rigid coupling according to the utility model;

[0019] Figure 3 This is a schematic diagram of the first part of the structure of a centrifugal pump with a friction-resistant rigid coupling according to the utility model;

[0020] Figure 4 The utility model is a centrifugal pump with a friction-resistant rigid coupling. Figure 3 The enlarged structural diagram at A in the middle;

[0021] Figure 5 This is a schematic diagram of the second part of the structure of a centrifugal pump with a friction-resistant rigid coupling according to the utility model.

[0022] Legend:

[0023] 1. Base plate; 2. Motor shaft; 3. Pump shaft; 4. First coupling; 5. Second coupling; 6. Connecting seat; 7. Connecting cover; 8. First coupling petal; 9. Interlayer pad; 10. Second coupling petal; 11. Connecting key; 12. Keyway; 13. Connecting plate; 14. Bolt; 15. Buffer pad; 16. Nut; 17. First fixing plate; 18. Latch; 19. Positioning rod; 20. Second fixing plate. DETAILED DESCRIPTION

[0024] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0025] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5The utility model embodiment is a centrifugal pump with a friction-resistant rigid coupling, which includes a base plate 1, a motor shaft 2 and a pump shaft 3. The motor shaft 2 and the pump shaft 3 are both fitted with a connecting seat 6 and a connecting cover 7 at the ends close to each other. The connecting seat 6 and the corresponding connecting cover 7 are fixedly connected by two symmetrically arranged connecting components. The ends close to the two connecting seats 6 are respectively fixedly connected with a first coupling 4 and a second coupling 5. The first coupling 4 and the second coupling 5 are respectively fixedly connected with a second coupling petal 10 and a first coupling petal 8 at the sides close to each other. The second coupling petal 10 is plugged with the first coupling petal 8, and a sandwich pad 9 is provided between the first coupling petal 8 and the second coupling petal 10; the connecting component includes two connecting plates 13 and two symmetrically arranged at the bottom of the lower connecting plate 13 The anti-loosening component, the connecting seat 6 and the connecting cover 7 are connected to the corresponding motor shaft 2 and pump shaft 3 through the connecting component. The connection work is simple and the connection is stable. The second coupling petal 10 of the first coupling 4 and the first coupling petal 8 of the second coupling 5 can be plugged in to complete the connection work of the motor shaft 2 and the pump shaft 3, thereby realizing power transmission, and a sandwich pad 9 is arranged between the second coupling petal 10 and the first coupling petal 8 to reduce the friction and wear between the first coupling 4 and the second coupling 5, thereby improving the service life and stability of the centrifugal pump. At the same time, an anti-loosening component is arranged to fix the nut 16 in the connecting component to ensure the tightening force of the nut 16, prevent the nut 16 from loosening during the operation of the centrifugal pump and affect the connection effect, thereby improving the reliability of the operation of the centrifugal pump.

[0026] The connection assembly also includes two bolts 14 symmetrically inserted into the two connection plates 13 and two nuts 16 threadedly connected to the bottom of the bolts 14. The anti-loosening assembly is connected in cooperation with the nuts 16. The bolts 14 are inserted into the interior of the connection plates 13, and the nuts 16 are tightened to fit the bottom of the connection plates 13 to complete the connection of the two connection plates 13, making the connection between the connection seat 6 and the connection cover 7 simple and efficient.

[0027] The anti-loosening assembly includes a second fixing plate 20 and a first fixing plate 17 fixedly connected to the bottom and one side of the connecting plate 13, a positioning rod 19 slidably connected to the inside of the second fixing plate 20, and a latch 18 threadedly connected to the inside of the first fixing plate 17. One end of the positioning rod 19 close to the nut 16 is in contact with the outer side of the nut 16, and the latch 18 is cooperated and plugged with the other end of the positioning rod 19. After the nut 16 is screwed on the bottom of the bolt 14 and in contact with the bottom of the connecting plate 13, the positioning rod 19 is moved to contact the outer side of the nut 16, and the latch 18 is cooperated and plugged with the positioning rod 19, so that the nut 16 can be positioned by the fixed positioning rod 19. The positioning rod 19 can prevent the nut 16 from loosening due to vibration, which is beneficial to ensuring the stability of the connection between the connecting seat 6 and the connecting cover 7.

[0028] A buffer pad 15 is fixedly connected to the bottom of the base plate 1. The interlayer pad 9 and the buffer pad 15 are both made of rubber. The buffer pad 15 made of rubber can buffer the vibration of the base plate 1 to reduce the vibration generated when the centrifugal pump is running. The interlayer pad 9 made of rubber can achieve shock absorption and buffering of the first coupling 4 and the second coupling 5, while avoiding friction between the first coupling 4 and the second coupling 5.

[0029] The outer sides of the motor shaft 2 and the pump shaft 3 are both provided with a connecting key 11, and the interior of the connecting cover 7 is provided with a key slot 12 which cooperates with the connecting key 11. When the connecting seat 6 and the connecting cover 7 are fixed on the motor shaft 2 or the pump shaft 3, the connecting key 11 and the key slot 12 cooperate and plug in to improve the stability of the connection between the connecting seat 6 and the connecting cover 7 to the motor shaft 2 or the pump shaft 3.

[0030] Working principle: The connection seat 6 and the connection cover 7 are attached to the outside of the motor shaft 2 and the pump shaft 3, the bolt 14 is inserted into the inside of the connection plate 13, and the nut 16 is tightened to fit with the bottom of the connection plate 13 to complete the connection of the two connection plates 13, making the connection of the connection seat 6 and the connection cover 7 simple and efficient. After the nut 16 is screwed on the bottom of the bolt 14 and fits with the bottom of the connection plate 13, the positioning rod 19 is moved to contact the outside of the nut 16, and the pin 18 is plugged into the positioning rod 19, so that the nut 16 can be positioned by the fixed positioning rod 19. The positioning rod 19 can prevent the nut 16 from loosening due to vibration, thereby improving the reliability of the operation of the centrifugal pump;

[0031] The second coupling petal 10 of the first coupling 4 and the first coupling petal 8 of the second coupling 5 can be plugged in and out to complete the connection between the motor shaft 2 and the pump shaft 3, thereby realizing power transmission, and a sandwich pad 9 is arranged between the second coupling petal 10 and the first coupling petal 8 to reduce the friction and wear between the first coupling 4 and the second coupling 5, thereby improving the service life and stability of the centrifugal pump.

[0032] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A centrifugal pump with a friction-resistant rigid coupling, characterized in that: The invention comprises a base plate (1), a motor shaft (2) and a pump shaft (3); the motor shaft (2) and the pump shaft (3) are fitted with a connection seat (6) and a connection cover (7) at the ends close to each other; the connection seat (6) and the corresponding connection cover (7) are fixedly connected via two symmetrically arranged connection components; the ends close to each other of the two connection seats (6) are respectively fixedly connected with a first coupling (4) and a second coupling (5); the sides close to each other of the first coupling (4) and the second coupling (5) are respectively fixedly connected with a second coupling petal (10) and a first coupling petal (8); the second coupling petal (10) is plugged in with the first coupling petal (8), and a sandwich pad (9) is provided between the first coupling petal (8) and the second coupling petal (10); The connection assembly comprises two connection plates (13) and two anti-loosening assemblies symmetrically arranged at the bottom of the lower connection plate (13).

2. A centrifugal pump with a friction-resistant rigid coupling according to claim 1, characterized in that: The connection assembly also includes two bolts (14) symmetrically inserted into the two connection plates (13) and two nuts (16) threadedly connected to the bottom of the bolts (14), and the anti-loosening assembly is cooperatively connected to the nuts (16).

3. A centrifugal pump with a friction-resistant rigid coupling according to claim 1, characterized in that: The anti-loosening assembly comprises a second fixing plate (20) and a first fixing plate (17) fixedly connected to the bottom and one side of the connecting plate (13), a positioning rod (19) slidably connected to the inside of the second fixing plate (20) and a latch (18) threadedly connected to the inside of the first fixing plate (17), one end of the positioning rod (19) close to the nut (16) is in contact with the outer side of the nut (16), and the latch (18) is plugged into the other end of the positioning rod (19).

4. A centrifugal pump with a friction-resistant rigid coupling according to claim 3, characterized in that: A buffer pad (15) is fixedly connected to the bottom of the base plate (1).

5. A centrifugal pump with a friction-resistant rigid coupling according to claim 4, characterized in that: The sandwich pad (9) and the buffer pad (15) are both made of rubber.

6. A centrifugal pump with a friction-resistant rigid coupling according to claim 5, It is characterized in that The outer sides of the motor shaft (2) and the pump shaft (3) are both provided with connecting keys (11). Furthermore, a keyway (12) is provided inside the connection cover (7) and is matched and connected with the connection key (11).

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