Self-priming centrifugal pump for cooling system of marine engine room

Abstract

The application provides a self-suction centrifugal pump for a ship engine room cooling system, comprising a pump body combined by a pump shell and a pump cover; a suction port arranged on the pump body; a suction port cover arranged at the position of the suction port; a water supply valve arranged on the pump body; a water supply valve cap arranged on the water supply valve; the chamber comprises an air-water separation chamber, a swirl chamber, a cavity and a return chamber; and a check valve is arranged between the swirl chamber and the suction port. The pump body is filled with liquid, and the chamber of the pump body is arranged as a special chamber comprising an air-water separation chamber, a swirl chamber and a return chamber, so that the pump body itself has a self-suction function, and no expensive self-suction device needs to be additionally arranged. The application has a compact overall structure, few parts, small floor space and low maintenance cost.

Description

Technical Field

[0001] This utility model belongs to the field of marine engine room cooling technology, and specifically relates to a self-priming centrifugal pump used in marine engine room cooling systems. Background Technology

[0002] Currently, when ship engines are operating, the temperature of the combustion gases can reach over 1000℃, causing severe overheating of components such as the cylinder head, cylinder liners, and pistons that are in direct contact with the combustion gases. This severe overheating can cause many adverse effects, so a cooling system is essential. Ideally, a water pump should pressurize the coolant to ensure its circulation within the cooling system, achieving a uniform and continuous cooling effect. Centrifugal pumps are commonly used in this system.

[0003] Centrifugal pumps in a ship's engine room cooling system are primarily used to deliver cooling media, maintain cooling water circulation to control the operating temperature of main engines, auxiliary engines, and other power equipment, and ensure the stable operation of the ship's power system. A centrifugal pump mainly consists of a pump casing, impeller, pump shaft, bearings, and sealing devices. The impeller primarily drives centrifugal motion, converting mechanical energy into fluid kinetic and pressure energy, while the pump casing mainly collects the fluid ejected by the impeller, converting kinetic energy into static pressure energy.

[0004] Because the centrifugal pumps in existing ship engine room cooling systems lack self-priming capabilities, and because the centrifugal force generated by the pump during pneumatic operation is only 1 / 800th that of the liquid, gas stagnates during pump startup and cannot be automatically expelled. Therefore, an expensive self-priming device precursor is required to enable self-priming. This results in drawbacks such as a large footprint and high maintenance costs.

[0005] Therefore, how to solve the defects in the existing technology has become one of the urgent problems to be solved in the field of ship engine room cooling technology. Utility Model Content

[0006] In view of the problems existing in the background art, the present invention provides a self-priming centrifugal pump for a ship engine room cooling system, comprising,

[0007] The pump body is composed of a pump casing and a pump cover;

[0008] A chamber is disposed within the pump body;

[0009] A suction port is provided on the pump body, and a suction port cover is provided at the suction port position;

[0010] A water supply valve is mounted on the pump body, and a water supply valve cap is provided on the water supply valve H.

[0011] The chamber includes a gas-water separation chamber, a vortex chamber, a cavity, and a return chamber.

[0012] Furthermore, a check valve is provided between the vortex chamber and the suction port.

[0013] Optionally, the vortex chamber is connected to the cavity.

[0014] A gas-water separation chamber connected to the outlet side of the vortex chamber is provided therewith.

[0015] Furthermore, the gas-liquid separation chamber is equipped with a return chamber connected to it.

[0016] Furthermore, the return chamber is provided with a return channel that communicates with the suction port located at the impeller position.

[0017] The gas-water separation chamber has an outlet.

[0018] Optionally, a check valve is provided on the suction port cover and is fixedly installed on the pump casing by bolts.

[0019] Optionally, the pump body also includes a bearing housing.

[0020] Furthermore, the pump cover is mounted on the bearing housing;

[0021] The pump body is equipped with a main shaft;

[0022] An impeller is mounted on the main shaft located inside the vortex chamber C.

[0023] One side of the impeller is provided with an impeller flat washer and a spring washer, which are fixed by impeller fasteners.

[0024] Optionally, a packing seal is provided on the main shaft near the impeller.

[0025] A sealing gland is provided on one side of the packing seal, which is in close contact with it.

[0026] It is fixed with bolts.

[0027] Optionally, a first ball bearing and a second ball bearing are provided on both sides of the main shaft.

[0028] A bearing cap is provided on one side of the first ball bearing, and

[0029] A check ring is provided between the first ball bearing and the bearing cap;

[0030] The bearing housing is equipped with support feet.

[0031] Optionally, a water-retaining ring is provided on the main shaft located between the second ball bearing and the sealing gland.

[0032] Optionally, a first coupling is mounted on the spindle away from the second ball bearing via a flat key.

[0033] A second coupling is provided on one side of the first coupling.

[0034] They are connected by coupling bolts.

[0035] In summary, the beneficial effects of this utility model are:

[0036] The pump body of this invention is filled with liquid, and by setting the pump body's chamber into a special chamber containing a gas-liquid separation chamber, a vortex chamber, and a return chamber, the pump body itself has a self-priming function, eliminating the need for an expensive self-priming device. This invention has a compact overall structure, few parts, a small footprint, and low maintenance costs. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the self-priming centrifugal pump used in a ship engine room cooling system according to this utility model;

[0038] Figure 2 This invention relates to an embodiment of a self-priming centrifugal pump for a ship engine room cooling system, showing the flow direction of liquid and gas within the pump casing chamber. Figure 1 ;

[0039] Figure 3 This invention relates to an embodiment of a self-priming centrifugal pump for a ship engine room cooling system, showing the flow direction of liquid and gas within the pump casing chamber. Figure 2 ;

[0040] Figure 4 This invention relates to an embodiment of a self-priming centrifugal pump for a ship engine room cooling system, showing the flow direction of liquid and gas within the pump casing chamber. Figure 3 ;

[0041] Figure 5 This invention relates to an embodiment of a self-priming centrifugal pump for a ship engine room cooling system, showing the flow direction of liquid and gas within the pump casing chamber. Figure 4 ;

[0042] Figure 6 This invention relates to an embodiment of a self-priming centrifugal pump for a ship engine room cooling system, showing the flow direction of liquid and gas within the pump casing chamber. Figure 5 .

[0043] Figure label:

[0044] 1. Pump casing; 2. Pump cover; 3. Impeller; 4. Water supply valve cap; 5. Sealing gasket; 6. Check valve; 7. Suction port cover; 8. Impeller fastener; 9. Spring washer; 10. Impeller flat washer; 11. Drain cover; 12. Sealing gasket; 13. First spacer ring; 14. Key; 15. O-ring; 16. Second spacer ring; 17. Water retaining ring; 18. Support foot; 19. Check retaining ring; 20. Key; 21. First coupling; 22. Coupling bolt; 23. Coupling ring; 24. Second coupling; 25. Bearing cover; 26. First ball bearing; 27. Main shaft; 28. Second ball bearing; 29. ​​Sealing gland; 30. Bearing housing; 31. Packing seal; 32. Sliding sleeve; H A. Water supply valve; B. Chamber; C. Vortex chamber; D. Gas-water separation chamber; A. Suction port; M. Outlet; E. Return port. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. Although exemplary embodiments are disclosed in the drawings, it should be understood that the present utility model can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to facilitate a more thorough understanding of the present utility model and to fully convey the concept of the present utility model to those skilled in the art.

[0046] In the description of this specification, the references to terms such as "certain embodiments," "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0047] In this utility model, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "install," "connect," "join," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "join" can be 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 according to the specific circumstances.

[0048] This utility model is mainly used in the fields of ship engine room cooling and fire protection, and can also be used in the fields of air conditioning, heating, sanitary water, cooling and refrigeration systems, liquid circulation and water supply. It mainly involves centrifugal pumps, motors and fluid transportation technology.

[0049] like Figure 1-6 As shown, this embodiment provides a self-priming centrifugal pump for a ship's engine room cooling system, including a pump body composed of a pump casing 1 and a pump cover 2, wherein a chamber is provided within the pump body.

[0050] The pump body is provided with a suction port A, and a suction port cover 7 is provided at the location of the suction port A;

[0051] The chamber includes a gas-water separation chamber D, a vortex chamber C, a chamber B, and a return chamber F, and a check valve 6 is provided between the vortex chamber C and the suction port A;

[0052] The pump body is equipped with a water supply valve H, and the water supply valve H is equipped with a water supply valve cap 4. Liquid is delivered to the chamber through the water supply valve H. In use, the water supply valve is opened to fill the chamber with water. After flushing is completed, the water supply valve is closed.

[0053] The pump body is provided with a chamber B, and a suction port A is provided on the chamber B. A check valve 6 is provided between the suction port A and the chamber B. By opening and closing the check valve, gas can enter the chamber B through the suction port A.

[0054] The pump body is also provided with a vortex chamber C that communicates with the chamber B. A gas-water separation chamber D that communicates with the outlet side of the vortex chamber C is provided, and a return chamber E that communicates with the gas-water separation chamber D is provided. A return channel that communicates with the suction port located at the impeller position is provided on the return chamber E, and an outlet M is provided on the gas-water separation chamber D.

[0055] In this embodiment, upon first use, the water supply valve is opened to fill the pump chamber with water, and then the valve is closed. When the pump starts, the impeller rotation automatically expels air from the pump inlet, thus achieving self-priming.

[0056] Furthermore, a suction port cover 7 is provided at the suction port A position, and a check valve 6 connected to the suction port cover 7 is provided thereon, and is fixedly installed on the pump casing 1 by bolts.

[0057] In this embodiment, the check valve gasket of the check valve is first installed onto the suction port cover. At this time, the bolt head is located on one side of the check valve gasket. It is gently tightened with a fork wrench. The connection between the nut and the bolt is fixed with a punch to complete the installation of the check valve gasket and realize the installation of the check valve and the suction port cover. Then, the suction port cover with the check valve is installed onto the pump housing and fixed with fastening bolts.

[0058] Furthermore, the pump cover 2 is installed on the bearing seat 30, and the pressure gauge mounting hole on the pump cover faces the water outlet inside the pump casing. The fastening bolts are tightened using a pneumatic wrench, thereby installing the pump cover 2 onto the bearing seat 30.

[0059] The pump body is equipped with a main shaft 27.

[0060] An impeller 3 is installed on the main shaft 27 located in the vortex chamber C, and an impeller flat washer 10 and a spring washer 9 are provided on one side of the impeller 3 and are fixed by an impeller fastener 8, preferably a fastening bolt.

[0061] Furthermore, a packing seal 31 is provided on the main shaft 27 near the impeller, and a sealing cap 29 is provided on one side of the packing seal 21 and is fixed thereto by bolts.

[0062] The main shaft 27 is provided with a first ball bearing 26 and a second ball bearing 28 on both sides. During installation, the two first ball bearings 26 and the second ball bearing 28 are electromagnetically heated to 110°C and then installed on the main shaft 27. Then, the main shaft with the bearings (first ball bearings and second ball bearings) installed is installed on the bearing housing 30. After confirming that the installation is in place, the check ring 19 is placed inside the bearing cover 25 and then fixed to the bearing housing with bolts. The bearing housing 30 is also fixedly installed with support feet 18 by fastening bolts.

[0063] Furthermore, a water-retaining ring 17 is provided on the main shaft 27 located between the second ball bearing 28 and the sealing cover 29.

[0064] Furthermore, a first coupling 21 is mounted on the main shaft 27 away from the second ball bearing 28 via a flat key 29, and a second coupling 24 is provided on one side of the first coupling 21 and connected to it via coupling bolts 22.

[0065] Furthermore, a drain cover 11 is provided on the pump casing, and a sealing gasket 12 is provided on one side of the drain cover 11, which is fixed by fastening bolts. After installation, the centrifugal pump is assembled with pipes and plugs and other related accessories are installed, which will not be described in detail here.

[0066] In this embodiment, after the centrifugal pump starts, the air at the pump inlet is automatically expelled, thus eliminating the need for an air extraction device or a self-priming device, achieving self-priming. This enables the centrifugal pump to start instantly in emergency situations on board, significantly reducing the risks of sudden incidents during ship operation and ensuring personal and property safety. Furthermore, it greatly reduces costs, simplifies assembly, and facilitates on-site installation and maintenance.

[0067] Those skilled in the art should understand that the specific steps for achieving self-priming in a centrifugal pump are as follows:

[0068] Step S1: Before using the centrifugal pump, first open the water supply valve to fill the pump chamber with liquid, then close the water supply valve. At this time, the check valve is in the closed state. Figure 2 As shown;

[0069] Step S2: Turn on the centrifugal pump. The drive unit rotates the impeller mounted on the main shaft, causing the liquid in chamber B to flow through the impeller and vortex chamber C into the gas-liquid separation chamber located on the outlet side. Figure 3 As shown;

[0070] Step S3: At this point, chamber B becomes under negative pressure. The check valve is opened, and suction port A is opened, allowing gas to enter and fill chamber B. Figure 4 As shown;

[0071] In step S4, the liquid enters the impeller's suction port from the gas-liquid separation chamber through the lower return chamber, forming a gas-liquid mixture, such as... Figure 5 As shown;

[0072] Step S5, the gas-liquid mixture flowing towards the impeller, along direction J, flows towards the outlet M, as shown. Figure 6 As shown;

[0073] In step S6, the lighter air in the gas-liquid separation chamber rises to the top (because the density of gas is much less than that of liquid, the less dense gas will naturally rise above the liquid) and flows out through outlet M, while the liquid returns to the return chamber. Figure 6 As shown;

[0074] Step S6, then repeat steps S3-S6 continuously until the air in the inlet pipe of chamber B is evacuated. At this time, the water in chamber B will be drawn up, and the centrifugal pump will start running.

[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not restrictive. Although this utility model has been described in detail with reference to the embodiments, those skilled in the art should understand that modifications or equivalent substitutions to the technical solution of this utility model do not depart from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A self-priming centrifugal pump for use in a ship engine room cooling system, characterized in that, include, impeller; The pump body is composed of a pump casing and a pump cover; A chamber is disposed within the pump body; A suction port is provided on the pump body, and a suction port cover is provided at the suction port position; A water supply valve is installed on the pump body, and a water supply valve cap is provided on the water supply valve; The chamber includes a gas-water separation chamber, a vortex chamber, a cavity, and a return chamber. Furthermore, a check valve is provided between the vortex chamber and the suction port; The vortex chamber is connected to the cavity, and an impeller is installed on the main shaft located inside the vortex chamber; A gas-water separation chamber connected to the outlet side of the vortex chamber is provided therewith. Furthermore, the gas-liquid separation chamber is equipped with a return chamber connected to it. Furthermore, the return chamber is provided with a return channel that communicates with the suction port located at the impeller position. The gas-liquid separation chamber is provided with an outlet; The pump body also includes a bearing housing. Furthermore, the pump cover is mounted on the bearing housing; The pump body is equipped with a main shaft; A packing seal is provided on the main shaft near the impeller. A sealing gland is provided on one side of the packing seal, which is in close contact with it. And it is fixed with bolts; The main shaft is provided with a first ball bearing and a second ball bearing on both sides. A bearing cap is provided on one side of the first ball bearing, and A check ring is provided between the first ball bearing and the bearing cap; A first coupling is mounted on the main shaft away from the second ball bearing via a flat key; A water-retaining ring is provided on the main shaft located between the second ball bearing and the sealing gland.

2. The self-priming centrifugal pump for a ship engine room cooling system according to claim 1, characterized in that, The suction port cover is equipped with a check valve connected thereto, and is fixedly installed on the pump casing by bolts.

3. The self-priming centrifugal pump for a ship engine room cooling system according to claim 2, characterized in that, One side of the impeller is provided with an impeller flat washer and a spring washer, which are fixed by impeller fasteners.

4. The self-priming centrifugal pump for a ship engine room cooling system according to claim 3, characterized in that, The bearing housing is equipped with support feet.

5. The self-priming centrifugal pump for a ship engine room cooling system according to claim 4, characterized in that, A second coupling is provided on one side of the first coupling. They are connected by coupling bolts.

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