Coupling of seawater circulating pump

Abstract

The utility model discloses a coupling of a seawater circulating pump, and relates to the field of coupling devices, the coupling comprises a lower shell, a connecting shell is rotatably arranged in the middle of the lower shell, a connecting hole is formed in the middle of the connecting shell, an inner tooth surface is arranged on the inner wall of the connecting shell, and a rotating shell abuts against the surface of the inner tooth surface; an upper shell is arranged on the upper end face of the lower shell, a stress plate is arranged in the middle of the upper shell, transverse grooves are formed in the two sides of the upper end face of the stress plate, polished rods are fixedly arranged in the two transverse grooves, and clamping plates are slidably arranged on the surfaces of the two polished rods. Noise generated during rotation is reduced, and meanwhile poor connection caused by water generated by the inner wall of the coupler is prevented.

Description

Technical Field

[0001] The present application relates to the field of coupling devices, and in particular to a coupling for a seawater circulation pump. Background Art

[0002] At present, the motor and gearbox of the conventional island seawater circulation pump of a traditional nuclear power plant are connected through a coupling. The traditional coupling is usually assembled using flanges, diaphragms, bearings and other structures to achieve the transmission effect, but the connection of multiple structures makes it easy to generate noise when the coupling rotates.

[0003] For example, patent number CN201920915631.4, an extended coupling for a conventional island seawater circulation pump of a nuclear power plant, includes a coupling body, a motor end flange, a diaphragm, a bearing and a gearbox end flange, wherein the motor end flange is arranged at the top of the coupling body; the diaphragm is arranged between the motor end flange and the coupling body; the bearing is arranged in the coupling body and is located below the diaphragm; the gearbox end flange is arranged at the bottom end of the coupling body; the coupling body is connected to the output end of the motor through the motor end flange; the coupling body is connected to the input end of the gearbox through the gearbox end flange. The above device has the following deficiencies in actual use:

[0004] When the device is in use, the motor rotates to drive the bearing, and the bearing is guided by the diaphragm and the flange to transmit the rotational force to the main end of the coupling. The main end is connected to the connecting shaft of the circulation pump, thereby completing the connection between the shafts. However, when the bearing rotates, friction occurs between the inner wall of the shell, thereby generating noise, and the coupling body is directly connected to the shaft. In the humid environment of conventional island seawater, moisture is easily generated between the coupling and the shaft, thereby affecting the rotating connection. Utility Model Content

[0005] In order to improve the problem that conventional couplings are prone to generate noise and are prone to moisture affecting rotation in a humid environment, the present application provides a coupling for a seawater circulation pump.

[0006] The coupling of a seawater circulation pump provided in this application adopts the following technical solution:

[0007] A coupling of a seawater circulation pump, comprising a lower housing, a connecting housing rotatably arranged in the middle of the lower housing, a connecting hole being opened in the middle of the connecting housing, an inner wall of the connecting housing being arranged as an inner tooth surface, a rotating housing being arranged in contact with the inner tooth surface;

[0008] The upper end surface of the lower shell is provided with an upper shell, and a force-bearing plate is provided in the middle of the upper shell. Both sides of the upper end surface of the force-bearing plate are provided with transverse grooves, smooth rods are fixed in the two transverse grooves, and clamping plates are slidably provided on the surfaces of the two smooth rods.

[0009] By adopting the above technical solution, the rotating shell is connected to the rotating shaft of the motor, and the clamping plate is connected to the connecting shaft of the circulating pump, thereby forming an overall fixation. At the same time, when the motor drives the rotating shell to rotate, the noise generated is intercepted by the upper shell and the lower shell to reduce the noise.

[0010] Preferably, a plug hole is provided in the middle of the lower end surface of the lower shell body, the plug hole passes through the top wall and is connected with the lower shell body cavity, and a rotation groove is provided around the upper end surface of the lower shell body.

[0011] By adopting the above technical solution, the rotating shaft of the motor is inserted into the lower shell through the insertion hole, and then inserted into the rotating shell, so as to transmit the rotational force. At the same time, the rotating groove limits the rotating shell to prevent the rotating shell from being offset when rotating.

[0012] Preferably, the outer surface of the rotating shell is configured as an outer tooth surface, the outer tooth surface is fixedly abutted against the inner tooth surface, the upper end surface of the rotating shell is fixedly provided with a convex block, and the upper end surface of the convex block is provided with a groove.

[0013] By adopting the above technical solution, the outer tooth surface abuts against the inner tooth surface, thereby reducing the noise generated during rotation. At the same time, the rotating shell and the connecting shell form a whole, thereby rotating synchronously.

[0014] Preferably, a clamping block is fixedly provided on the lower end surface of the force-bearing plate, and a clamping groove is formed on the lower end surface of the force-bearing plate around the clamping block.

[0015] By adopting the above technical solution, the outer shape of the clamping block is engaged with the groove to achieve plug-in, and the clamping groove is engaged with the protrusion on the top of the convex block to achieve plug-in, and it is easy to separate and disassemble.

[0016] Preferably, the clamping block is inserted into and engaged with the groove, and the protrusion is inserted into and engaged with the clamping groove.

[0017] By adopting the above technical solution, the groove is connected to the clamping block and the protrusion is connected to the clamping groove, thereby completing the horizontal connection between the rotating shell and the force-bearing plate, so that the rotating shell transmits the rotational force to the force-bearing plate.

[0018] Preferably, connecting plates are fixedly provided on both sides of the two clamping plates, and connecting plates are fixedly provided on both sides of the two clamping plates.

[0019] By adopting the above technical solution, the screws in the connecting plates are turned to shorten the distance between the two connecting plates, thereby controlling the two clamping plates to fix the connecting shaft of the circulating pump.

[0020] Preferably, a limiting ring is fixedly provided between the upper shell and the lower shell, and four through holes are opened on the surface of the limiting ring.

[0021] By adopting the above technical solution, the four through holes are used for connecting screws to assist in the overall installation of the coupling.

[0022] Preferably, four upper through holes are formed at a position where the lower end surface of the upper shell is aligned with the middle through hole, and four lower through holes are formed at a position where the upper end surface of the lower shell is aligned with the middle through hole.

[0023] By adopting the above technical solution, screws are used to fix the four upper through holes, the middle through holes and the lower through holes one by one, so that the upper shell, the limit ring and the lower shell are fixed as a whole, which is convenient for disassembly.

[0024] In summary, the present application includes at least one of the following beneficial technical effects:

[0025] 1. The noise is initially intercepted by using the gap between the outer tooth surface and the inner tooth surface, and the lower shell and the upper shell covered by the outer surface of the connecting shell are used to intercept the noise for the second time, thereby reducing the noise generated by the coupling when it rotates;

[0026] 2. With the upper shell fixedly connected to the mounting end of the circulating pump and the lower shell fixedly connected to the mounting end of the motor, the rotating shell and the clamping plate are located inside the upper shell and the lower shell for rotation without affecting the rotation connection of the bearing. The bearing is isolated inside the shell and the moisture-proof material on the surface of the shell is used to prevent the coupling from being affected by the environment and generating moisture when connected to the shaft, thereby affecting the rotation of the bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a three-dimensional schematic diagram of this application;

[0028] Figure 2 This is a three-dimensional exploded view of this application;

[0029] Figure 3 This is the main cross-sectional view of this application;

[0030] Figure 4 A cross-sectional view of the connection housing for this application;

[0031] Figure 5 Rotate the housing connection diagram for this application.

[0032] Reference numerals: 1, upper housing; 1a, upper through hole;

[0033] 2. Lower housing; 2a. Rotation slot; 2b. Insertion hole; 2c. Lower through hole;

[0034] 3. Connecting housing; 3a. Internal tooth surface; 3b. Connecting hole;

[0035] 4. Rotating housing; 4a. Protrusion; 4b. Groove; 4c. External tooth surface;

[0036] 5. Limiting ring; 5a. Middle through hole;

[0037] 6. Load-bearing plate; 6a. Snap-in groove; 6b. Snap-in block; 6c. Horizontal groove; 6d. Smooth rod;

[0038] 7. Clamping plate; 7a. Connecting plate. DETAILED DESCRIPTION

[0039] The following is combined with Figure 1 —5 further describes this application in detail.

[0040] An embodiment of the present application discloses a coupling for a seawater circulation pump.

[0041] Example 1

[0042] Reference Figure 1 , 4 A coupling of a seawater circulation pump includes a lower shell 2. The lower shell 2 is hollow cylindrical as a whole and hollow inside, and the inner wall surface is provided with a thread. An annular rotation groove 2a is provided on the top surface of the lower shell 2. The rotation groove 2a penetrates the lower shell 2 and is connected to the internal space. A plug hole 2b is provided in the middle of one end surface of the lower shell 2 away from the rotation groove 2a. The plug hole 2b penetrates the lower shell 2 and is connected to the internal space. Four lower through holes 2c are provided on the upper end surface of the lower shell 2 around the outer side of the rotation groove 2a.

[0043] It should be noted that the bottom surface of the lower shell 2 is fixed to the fixed end of the external rotating shaft, and DPS permanent setting agent is applied on the bottom surface for waterproofing and anti-corrosion.

[0044] Through the above arrangement, the lower shell 2 is used to cover the subsequent connecting shell 3, rotating shell 4 and other structures to isolate noise and prevent seawater penetration and corrosion. At the same time, the external rotating shaft is inserted into the internal space of the lower shell 2 through the socket 2b, thereby being fixed to the subsequent rotating shell 4.

[0045] Reference Figure 3 , 4 The inner wall of the lower shell 2 is threadedly provided with a connecting shell 3. The connecting shell 3 is cylindrical as a whole and hollow inside. Under normal circumstances, the upper end surface of the connecting shell 3 is flush with the upper end surface of the lower shell 2. The annular protrusion on the upper end surface of the connecting shell 3 is movably abutted against the groove of the rotating groove 2a. A connecting hole 3b is opened in the middle of the upper end surface of the connecting shell 3. The connecting hole 3b passes through the bottom wall and is connected with the through space in the connecting shell 3. The inner wall surface of the connecting shell 3 is set as an inner tooth surface 3a, and the tooth surface protrusion of the inner tooth surface 3a needs to be 2 to 3 cm lower than the opening of the jack 2b.

[0046] Through the above arrangement, the connecting shell 3 is subjected to the rotational force and rotates horizontally along the threaded surface of the inner wall of the lower shell 2, thereby transmitting the rotational force to the subsequent rotating shell 4, and at the same time, the internal space of the connecting shell is reserved for the installation of the rotating shell 4.

[0047] Reference Figure 2 , 3 , 5. A limiting ring 5 is fixedly provided on the upper end surface of the lower shell body 2, a through groove is provided in the middle of the limiting ring 5, four middle through holes 5a are provided on the surface of the limiting ring 5, and the four middle through holes 5a are respectively aligned with the four lower through holes 2c one by one, and the four middle through holes 5a penetrate the limiting ring 5 and are connected with the four lower through holes 2c one by one.

[0048] Through the above arrangement, the limiting ring 5 is fixedly connected to the lower shell body 2, so that the lower end face of the limiting ring 5 and the rotating groove 2a form an annular groove. When the connecting shell body 3 rotates, the annular protrusion on the top of the connecting shell body 3 rotates in the rotating groove 2a, and the limiting ring 5 applies a downward fixing force to the annular protrusion, thereby limiting the connecting shell body 3 to prevent displacement.

[0049] Reference Figure 2 , 3 4. The rotating shell 4 is cylindrical as a whole and hollow inside (the inner wall radius of the rotating shell 4 is consistent with the radius of the insertion hole 2b). The outer surface of the rotating shell 4 is set as an outer tooth surface 4c, and the outer tooth surface 4c is fixedly abutted with the inner tooth surface 3a, so that the rotating shell 4 is fixed to the connecting shell 3. A protrusion 4a is fixedly provided on the top surface of the rotating shell 4. The protrusion 4a is set as a circular cylinder, and a hexagonal groove 4b is opened inward on the upper end surface of the protrusion 4a. Under normal conditions, the protrusion 4a is movably plugged into the inner wall of the through groove in the middle of the limiting ring 5, and the top of the protrusion 4a protrudes from the limiting ring 5 by 3 to 5 cm (such as Figure 3 shown).

[0050] It should be noted that there is a gap when the inner tooth surface 3a and the outer tooth surface 4c are abutted and fixed, and centrifugal glass wool is filled in the gap to absorb noise and have a moisture-proof effect.

[0051] Through the above arrangement, the external rotating shaft is inserted into the inner wall of the rotating shell 4 through the socket 2b and threadedly fixed. When the rotating shaft rotates, it drives the rotating shell 4 to rotate, and transmits the rotational force to the rotating shaft and the connecting shell 3 respectively. At the same time, the lower shell 2 is fixed to the outside, so that the connecting shell 3 is located in the lower shell 2 and rotates. The lower shell 2 blocks the noise and cooperates with the centrifugal glass wool to reduce the noise generated by the rotation of the rotating shell 4.

[0052] Reference Figure 1 , 25. The upper end surface of the limiting ring 5 is fixed with an upper shell 1, and a through hole is formed in the middle of the upper shell 1, and a force-bearing plate 6 is rotatably arranged at the bottom of the through hole. A clamping block 6b is fixed on the bottom surface of the force-bearing plate 6. The clamping block 6b is a hexagonal main body, and an annular clamping groove 6a is opened around the clamping hole 6b on the bottom surface of the force-bearing plate 6. Under normal conditions, the clamping block 6b is inserted into the groove 4b, and the convex part on the top of the convex block 4a is inserted into the clamping groove 6a. The top surface of the force-bearing plate 6 is provided with two A transverse groove 6c, smooth rods 6d are fixed at both ends of the grooves of the two transverse grooves 6c, and the surfaces of the two smooth rods 6d are respectively slidably connected to the sliders at the bottom of the two clamping plates 7. The two clamping plates 7 are U-shaped as a whole and face opposite to each other. A layer of rubber material is provided on the surface of the opposite side of the two clamping plates 7 to increase friction. Connecting plates 7a are fixed at both ends of the two clamping plates 7, and a threaded through hole is opened in the middle of the connecting plate 7a. Four connecting plates 7a are connected in pairs by screws to fix the two clamping plates 7.

[0053] It is worth mentioning that four upper through holes 1a are opened on the bottom surface of the upper shell 1, and the top ends of the four upper through holes 1a pass through the upper shell 1 and are connected to the outside, and the four upper through holes 1a are respectively aligned with and connected with the middle through holes 5a, and then the four upper through holes 1a, the four middle through holes 5a and the four lower through holes 2c are all centrally aligned, and the upper shell 1, the limit ring 5 and the lower shell 2 are fixed as a whole by screwing in screws, thereby completing the assembly of the coupling.

[0054] Through the above arrangement, the screw is turned to shorten the distance between the two clamping plates 7, so that they are abutted and fixed with the connecting shaft of the circulation pump. When the rotating shell 4 rotates, the rotational force is transmitted from the protrusion 4a to the clamping block 6b, thereby causing the force-bearing plate 6 to rotate synchronously. The rotation of the force-bearing plate 6 drives the two clamping plates 7 to rotate, thereby causing the connecting shaft of the circulation pump to rotate.

[0055] Among them, the structural surfaces of the device, such as the upper shell 1, the lower shell 2, the limiting ring 5, etc., which are exposed to the outside, are coated with sound insulation and moisture-proof materials such as polyester fibers.

[0056] The implementation principle of the coupling of a seawater circulation pump in an embodiment of the present application is as follows: when using the device, first tighten the screws at both ends of the two clamping plates 7 to make the two clamping plates 7 abut and fix with the connecting shaft of the circulation pump, then insert the rotating shaft of the motor into the rotating shell 4 through the insertion hole 2b, and fix it with the inner wall thread of the rotating shell 4, and then use screws from the four upper through holes 1a to the middle through holes 5a and the lower through holes 2c to fix the upper shell 1 with the lower shell 2, and the plane at the upper end of the upper shell 1 is fixed with the mounting end of the circulation pump, and the plane at the lower end of the lower shell 2 is fixed with the mounting end of the motor, thereby completing the assembly of the coupling.

[0057] When the assembly is completed, the microcomputer sends a signal to control the motor to rotate. The motor's rotating shaft rotates to drive the rotating shell 4 to rotate. The rotating shell 4 rotates to drive the connecting shell 3 to rotate, so that the connecting shell 3 located on the inner surface of the lower shell 2 rotates.

[0058] When the rotating shell 4 rotates, the force-bearing plate 6 in the groove 4b is driven to rotate synchronously through the rotation of the protrusion 4a. When the force-bearing plate 6 is rotated by the inner wall of the upper shell 1 under the rotational force, the two clamping plates 7 are driven to rotate, thereby transmitting the rotational force to the connecting shaft of the circulating pump, and the motor drives the connecting shaft of the circulating pump to rotate.

[0059] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A coupling for a seawater circulation pump, characterized in that: It comprises a lower shell (2), a connecting shell (3) is rotatably arranged in the middle of the lower shell (2), a connecting hole (3b) is opened in the middle of the connecting shell (3), the inner wall of the connecting shell (3) is arranged as an inner tooth surface (3a), and a rotating shell (4) is arranged in contact with the surface of the inner tooth surface (3a); An upper shell (1) is arranged on the upper end surface of the lower shell (2), a force-bearing plate (6) is arranged in the middle of the upper shell (1), transverse grooves (6c) are provided on both sides of the upper end surface of the force-bearing plate (6), smooth rods (6d) are fixed in the two transverse grooves (6c), and clamping plates (7) are slidably arranged on the surfaces of the two smooth rods (6d).

2. A coupling for a seawater circulation pump according to claim 1, characterized in that: A plug hole (2b) is provided in the middle of the lower end surface of the lower shell (2), and the plug hole (2b) passes through the top wall and communicates with the cavity of the lower shell (2). A rotation groove (2a) is provided around the upper end surface of the lower shell (2).

3. The coupling of a seawater circulation pump according to claim 1, characterized in that: The outer surface of the rotating shell (4) is arranged as an outer tooth surface (4c), the outer tooth surface (4c) is fixedly abutted against the inner tooth surface (3a), the upper end surface of the rotating shell (4) is fixedly provided with a convex block (4a), and the upper end surface of the convex block (4a) is provided with a groove (4b).

4. A coupling for a seawater circulation pump according to claim 3, characterized in that: A clamping block (6b) is fixedly arranged on the lower end surface of the force-bearing plate (6), and a clamping groove (6a) is provided on the lower end surface of the force-bearing plate (6) around the clamping block (6b).

5. A coupling for a seawater circulation pump according to claim 4, characterized in that: The clamping block (6b) is inserted and engaged with the groove (4b), and the protrusion (4a) is inserted and engaged with the clamping groove (6a).

6. The coupling of a seawater circulation pump according to claim 1, characterized in that: Connecting plates (7a) are fixedly provided on both sides of the two clamping plates (7); connecting plates (7a) are fixedly provided on both sides of the two clamping plates (7).

7. The coupling of a seawater circulation pump according to claim 1, characterized in that: A limiting ring (5) is fixedly arranged between the upper shell (1) and the lower shell (2), and four through holes (5a) are formed on the surface of the limiting ring (5).

8. The coupling of a seawater circulation pump according to claim 1, characterized in that: Four upper through holes (1a) are provided at the position where the lower end surface of the upper shell (1) is aligned with the middle through hole (5a), and four lower through holes (2c) are provided at the position where the upper end surface of the lower shell (2) is aligned with the middle through hole (5a).

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