High-temperature-resistant OH3 vertical pipeline type centrifugal pump

Abstract

The utility model relates to the technical field of pipeline type centrifugal pumps, and discloses a high-temperature-resistant OH3 vertical pipeline type centrifugal pump which comprises a pump body, a pump cover is arranged at the top end of the pump body, a mechanical sealing sleeve is arranged in the top end of the pump cover, a mounting groove is formed in the lower middle portion of the pump cover, a sliding bearing is arranged in the mounting groove, and a sealing ring is arranged in the sliding bearing. A threaded water groove is formed in the outer side of the sliding bearing, a bearing support is arranged on the outer side of the top end of the pump cover, a bearing body is arranged at the top end in the bearing support, a rolling bearing is arranged in the bearing body, a lip-shaped sealing ring is arranged at the bottom end of the rolling bearing, and a bearing gland is arranged in the middle of the top end of the bearing support. According to the utility model, the fan is used for cooling, lubricating grease coated on the rolling bearing and the bearing body is prevented from melting quickly, and the left end of the flushing hole is connected with an external water source, so that the sliding bearing can be cooled, and the service life of the rolling bearing and the sliding bearing is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline centrifugal pumps, in particular to a high-temperature resistant OH3 vertical pipeline centrifugal pump. Background Art

[0002] A centrifugal pump refers to a pump that uses the centrifugal force generated by the rotation of an impeller to transport liquids. A centrifugal pump works by using the rotation of the impeller to cause the water to undergo centrifugal motion. Before starting the pump, the pump casing and the suction pipe must be filled with water. Then, the motor is started, causing the pump shaft to drive the impeller and the water to rotate at a high speed. The water undergoes centrifugal motion and is carried to the outer edge of the impeller, and then flows into the pressure pipeline of the pump through the flow channel of the volute pump casing.

[0003] After retrieval, Chinese Patent Publication No.: CN115949614A discloses a vertical pipeline pump with a grease-lubricated bearing housing, including a pump body, a pump cover connected to the pump body, a bearing housing connected to the pump cover, and a bearing gland connected to the bearing housing. A pump shaft and a pump body wearing ring are provided in the pump body. An impeller is connected to the pump shaft. A deep groove ball bearing is provided on one side of the pump shaft close to the impeller, and a pair of angular contact rolling bearings are provided on the driving end side of the pump shaft. The pump shaft is connected to the bearing housing through the deep groove ball bearing shaft and the angular contact rolling bearing. Bearing isolators are provided between the rear end of the angular contact rolling bearing and the pump shaft between the bearing gland, and between the front end of the deep groove ball bearing and the pump shaft between the bearing housing. Impeller wearing rings are provided at the front and rear ends of the impeller, and there is a gap between the pump body and the pump body wearing ring. In the present invention, the bearings in the bearing housing are lubricated with high-performance grease, which can provide wear protection within a high load range, has a great load-bearing capacity and strong anti-aging performance, and can effectively extend the service life of the bearings.

[0004] However, this device cannot be used under working conditions above 120°C. In a high-temperature environment, the grease applied to the bearings will melt, exacerbating the friction between the rolling elements and the raceways, and reducing the service life of the bearings. Therefore, a high-temperature resistant OH3 vertical pipeline centrifugal pump is proposed to solve the above problems. Content of the Utility Model

[0005] In order to make up for the above deficiencies, the utility model provides a high-temperature resistant OH3 vertical pipeline centrifugal pump, aiming to improve the problems that the centrifugal pump in the prior art cannot be used under working conditions above 120°C, and the grease applied to the bearings melts in a high-temperature environment, reducing the lubrication effect.

[0006] To achieve the above object, the utility model adopts the following technical scheme: A high-temperature resistant OH3 vertical pipeline centrifugal pump, comprising a pump body, a pump cover is arranged at the top of the pump body, a mechanical seal sleeve is arranged inside the top of the pump cover, an installation groove is opened in the middle and lower part of the pump cover, a sliding bearing is arranged inside the installation groove, a threaded water groove is opened on the outer side of the sliding bearing, a bearing bracket is arranged on the outer side of the top of the pump cover, a bearing body is arranged at the inner top of the bearing bracket, a rolling bearing is arranged inside the bearing body, a lip seal is arranged at the bottom end of the rolling bearing, a bearing gland is arranged in the middle of the top of the bearing bracket, a motor bracket is arranged on the outer side of the bearing gland at the top of the bearing bracket, a three-phase asynchronous motor is fixedly connected to the top of the motor bracket, an output end of the three-phase asynchronous motor is fixedly connected to a main shaft, the main shaft sequentially penetrates through the bearing gland, the bearing body, the mechanical seal sleeve, and the sliding bearing and is rotatably connected between the bearing bracket and the pump cover, and an impeller is fixedly connected to the bottom end of the main shaft.

[0007] As a further description of the above technical scheme: A fan is fixedly connected to the outer side of the main shaft, and the fan is located at the top of the bearing gland.

[0008] As a further description of the above technical scheme: A flushing hole is opened at the left end of the pump cover, and the flushing hole communicates with the installation groove.

[0009] As a further description of the above technical scheme: An inlet is opened at the right end of the pump body, an outlet is opened at the left end of the pump body, a chamber is opened inside the pump body, the inlet and the outlet communicate through the chamber, the impeller is located at the top of the chamber, and the installation groove communicates with the chamber.

[0010] As a further description of the above technical scheme: The outer side of the main shaft is in interference fit with the inner side of the sliding bearing, and the outer side of the main shaft is in interference fit with the inner side of the rolling bearing.

[0011] As a further description of the above technical scheme: An exhaust hole is opened at the right end of the pump cover, and the bottom end of the exhaust hole communicates with the chamber.

[0012] As a further description of the above technical scheme: The impeller is a closed impeller.

[0013] As a further description of the above technical scheme: The chamber is semi-spiral.

[0014] The utility model has the following beneficial effects:

[0015] 1. In the present utility model, the fan above the bearing gland rotates to disperse heat, cooling the rolling bearing and the bearing body under working conditions of relatively high temperature, preventing the grease applied on the rolling bearing and the bearing body from melting rapidly, and extending the service life of the rolling bearing and the bearing body.

[0016] 2. In the present utility model, by connecting an external water source to the left end of the flushing hole, water enters the installation groove through the flushing hole and falls inside the chamber along the threaded water groove, and is taken out of the water outlet in cooperation with the rotation of the impeller, thereby cooling the sliding bearing and extending the service life of the sliding bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a front view of the internal structure of a high-temperature resistant OH3 vertical pipeline centrifugal pump proposed by the present utility model;

[0018] Figure 2 is Figure 1 an enlarged view of part A in

[0019] Figure 3 is an enlarged view of the pump cover of a high-temperature resistant OH3 vertical pipeline centrifugal pump proposed by the present utility model.

[0020] LEGEND DESCRIPTION:

[0021] 1. Pump body; 2. Impeller; 3. Pump cover; 4. Bearing bracket; 5. Main shaft; 6. Motor bracket; 7. Three-phase asynchronous motor; 8. Fan; 9. Bearing gland; 10. Rolling bearing; 11. Bearing body; 12. Lip seal; 13. Mechanical seal sleeve; 14. Sliding bearing; 15. Flushing hole; 16. Vent hole; 17. Inlet; 18. Outlet; 19. Chamber; 20. Installation groove; 21. Threaded water groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0023] Refer to Figure 1 and Figure 2, an embodiment provided by the present utility model: a high-temperature resistant OH3 vertical pipeline centrifugal pump, including a pump body 1, a pump cover 3 is provided at the top of the pump body 1, a mechanical seal sleeve 13 is provided inside the top of the pump cover 3, an installation groove 20 is opened in the middle and lower part of the pump cover 3, a sliding bearing 14 is provided inside the installation groove 20, a threaded water groove 21 is opened on the outer side of the sliding bearing 14, a bearing bracket 4 is provided on the outer side of the top of the pump cover 3, a bearing body 11 is provided at the inner top of the bearing bracket 4, a rolling bearing 10 is provided inside the bearing body 11, a lip seal 12 is provided at the bottom end of the rolling bearing 10, a bearing gland 9 is provided in the middle of the top of the bearing bracket 4, a motor bracket 6 is provided on the outer side of the bearing gland 9 at the top of the bearing bracket 4, a three-phase asynchronous motor 7 is fixedly connected to the top of the motor bracket 6, an output end of the three-phase asynchronous motor 7 is fixedly connected to a main shaft 5, the main shaft 5 sequentially passes through the bearing gland 9, the bearing body 11, the mechanical seal sleeve 13, and the sliding bearing 14 and is rotatably connected between the bearing bracket 4 and the pump cover 3, a bottom end of the main shaft 5 is fixedly connected to an impeller 2, the rolling bearing 10 bears axial force and radial force, the sliding bearing 14 bears radial force, grease lubrication is adopted for lubrication between the rolling bearing 10 and the bearing body 11 inside the main shaft 4, and the motor bracket 6 and the bearing bracket 5 are welded and processed.

[0024] Refer to Figure 1 and Figure 2 , a fan 8 is fixedly connected to the outer side of the main shaft 5, the fan 8 is located at the top of the bearing gland 9, the outer side of the main shaft 5 is in interference fit with the inner side of the sliding bearing 14, the outer side of the main shaft 5 is in interference fit with the inner side of the rolling bearing 10, grease is applied on the rolling bearing 10 and the bearing body 11, and the grease has certain heat conduction performance and can transfer the heat generated inside the bearing to the bearing bracket 4 or the surrounding environment, so as to play a role in heat dissipation, cooling and lubrication, and the high-speed rotation of the fan 8 can make the air circulate quickly and take out the heat.

[0025] Refer to Figure 1 , Figure 2 and Figure 3 , a flushing hole 15 is opened at the left end of the pump cover 3, the flushing hole 15 is communicated with the installation groove 20, a water inlet 17 is opened at the right end of the pump body 1, a water outlet 18 is opened at the left end of the pump body 1, a chamber 19 is opened inside the pump body 1, the water inlet 17 and the water outlet 18 are communicated through the chamber 19, the impeller 2 is located at the top of the chamber 19, the installation groove 20 is communicated with the chamber 19, an exhaust hole 16 is opened at the right end of the pump cover 3, and the bottom end of the exhaust hole 16 is communicated with the chamber 19. When the temperature of the medium transported by the centrifugal pump is relatively high, or the heat dissipation condition at the sliding bearing 14 is not good, cooling flushing liquid is introduced from the outside through the flushing hole 15 to the sliding bearing 14, which can effectively reduce the temperature of the sliding bearing 14 and avoid damage to the bearing due to high temperature. The exhaust hole 16 is used to balance the pressure inside the pump body 1, and the exhaust hole 16 is formed by machining or casting.

[0026] Reference Figure 1 , the impeller 2 is a closed impeller 2. Since the blades of the closed impeller 2 are closed, it can better guide the liquid flow, reduce the liquid backflow and eddy current phenomena, thereby improving the flow efficiency of the centrifugal pump.

[0027] Reference Figure 1 , the chamber 19 is semi-helical. The semi-helical suction chamber can make the liquid flow into the water inlet 17 in a relatively stable manner, avoiding the energy loss caused by the liquid directly impacting the blades of the impeller 2.

[0028] Working principle: First, fill the inside of the pump body 1 with water, then start the three-phase asynchronous motor 7 to drive the fixed main shaft 5 to rotate, so that the impeller 2 and the fan 8 rotate at high speed. Driven by the blades of the impeller 2, the liquid also rotates together. Under the action of inertial centrifugal force, the liquid is thrown from the center of the impeller 2 to the outer periphery of the impeller 2 and flows out from the water outlet 18. After the liquid is carried out of the impeller 2 at high speed, the liquid in the center part of the impeller 2 decreases, forming a certain vacuum area. Under the action of the pressure difference between the external atmospheric pressure and the vacuum area in the pump body 1, the liquid is pressed into the inside of the pump body 1 through the water inlet 17 to fill the position of the liquid discharged by the impeller 2. The grease applied on the bearing body 11 and the rolling bearing 10 cooperates with the rotation of the fan 8 to lubricate and cool the rolling bearing 10. The flushing hole 15 is connected to an external water source. Water enters the installation groove 20 through the flushing hole 15 and falls into the chamber 19 along the threaded water groove 21, and flows out from the water outlet 18 in cooperation with the rotation of the impeller 2, cooling the sliding bearing 14 to prevent the temperature from being too high and affecting the use of the centrifugal pump.

[0029] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A high temperature resistant OH3 vertical pipeline centrifugal pump, comprising a pump body (1), characterized in that: A pump cover (3) is arranged at the top of the pump body (1), a mechanical seal sleeve (13) is arranged inside the top of the pump cover (3), a mounting groove (20) is provided at the middle and lower part of the pump cover (3), a sliding bearing (14) is arranged inside the mounting groove (20), a threaded water groove (21) is arranged on the outer side of the sliding bearing (14), a bearing bracket (4) is arranged on the outer side of the top of the pump cover (3), a bearing body (11) is arranged at the top of the bearing bracket (4), a rolling bearing (10) is arranged inside the bearing body (11), and a lip seal is arranged at the bottom of the rolling bearing (10). A ring (12) is provided at the middle of the top end of the bearing support (4), a bearing cover (9) is provided at the top end of the bearing support (4) on the outside of the bearing cover (9), a motor support (6) is fixedly connected to the top end of the motor support (6) with a three-phase asynchronous motor (7), an output end of the three-phase asynchronous motor (7) is fixedly connected to a main shaft (5), the main shaft (5) passes through the bearing cover (9), the bearing body (11), the mechanical sealing sleeve (13), and the sliding bearing (14) in sequence and is rotatably connected between the bearing support (4) and the pump cover (3), and the bottom end of the main shaft (5) is fixedly connected to an impeller (2).

2. A high temperature resistant OH3 vertical pipeline centrifugal pump according to claim 1, characterized in that: A fan (8) is fixedly connected to the outer side of the main shaft (5), and the fan (8) is located at the top end of the bearing cover (9).

3. The high temperature resistant OH3 vertical pipeline centrifugal pump according to claim 1 is characterized in that: A flushing hole (15) is provided at the left end of the pump cover (3), and the flushing hole (15) is communicated with the mounting groove (20).

4. The high temperature resistant OH3 vertical pipeline centrifugal pump according to claim 1 is characterized in that: The right end of the pump body (1) is provided with a water inlet (17), the left end of the pump body (1) is provided with a water outlet (18), the interior of the pump body (1) is provided with a chamber (19), the water inlet (17) and the water outlet (18) are connected via the chamber (19), the impeller (2) is located at the top of the chamber (19), and the mounting groove (20) is connected to the chamber (19).

5. The high temperature resistant OH3 vertical pipeline centrifugal pump according to claim 1 is characterized in that: The outer side of the main shaft (5) is in interference fit with the inner side of the sliding bearing (14), and the outer side of the main shaft (5) is in interference fit with the inner side of the rolling bearing (10).

6. The high temperature resistant OH3 vertical pipeline centrifugal pump according to claim 1, characterized in that: The right end of the pump cover (3) is provided with an exhaust hole (16), and the bottom end of the exhaust hole (16) is communicated with the chamber (19).

7. The high temperature resistant OH3 vertical pipeline centrifugal pump according to claim 1 is characterized in that: The impeller (2) is a closed impeller (2).

8. The high temperature resistant OH3 vertical pipeline centrifugal pump according to claim 4 is characterized in that: The chamber (19) is semi-helical.

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