Rotating shaft sealing device for centrifugal pump

Abstract

The utility model relates to the technical field of sealing devices, and discloses a rotating shaft sealing device for a centrifugal pump, which comprises a sealing shell. According to the rotating shaft sealing device for the centrifugal pump, when the rotating shaft is sealed, external impurities and liquid are sealed and blocked outside the device, and due to continuous rotating sealing of internal parts, heat is generated by friction of the internal parts, the friction force between the parts is increased, and the internal parts are abraded, so that the rotating connecting piece is mounted outside the rotating shaft; an oil inlet hole and an oil conveying pipe are installed on the surface of the front end of the rotating connecting piece, lubricating oil is poured into the device through the oil conveying pipe, and due to the fact that a plurality of fine oil leakage holes are formed in the middle of the rotating shaft, the lubricating oil flows into the device through the holes for lubrication, the function of lubricating the internal device is achieved, and the situation that the device cannot be lubricated due to the lack of the lubricating function is avoided. And friction between internal parts is caused, so that the internal parts are abraded and damaged, the service life of the ear canal of the device is shortened, and the rotation flexibility is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to sealing device technical field especially relates to a rotating shaft sealing device for centrifugal pump. BACKGROUND

[0002] Centrifugal pump is a kind of mechanical equipment widely used in liquid delivery, and its basic working principle is to accelerate and deliver liquid by rotating impeller. The rotating shaft of centrifugal pump will rub with pump body during working process, so sealing device is needed to prevent liquid leakage and ensure normal operation of pump, so a rotating shaft sealing device for centrifugal pump needs to be designed.

[0003] The existing sealing device, rotating shaft sealing device is one of the key components of centrifugal pump, however, using the mode of rotating shaft sealing, the internal parts are sealed by rotating, and heat is generated between the internal parts due to long-time rotating friction, which increases the friction and causes the internal parts to wear and damage. In order to ensure the service life and flexibility of the internal parts of the device, lubrication is needed inside the device to reduce wear and tear and the smoothness of rotation. And the existing sealing device, the rotating shaft will generate heat while rotating and sealing, so a device that can continuously reduce the temperature of the device needs to be installed inside the device to reduce the working temperature of the sealing device and prevent the sealing element from being damaged due to overheating. SUMMARY

[0004] The utility model aims at providing a rotating shaft sealing device for centrifugal pump to solve the problem of the existing sealing device in the background art, rotating shaft sealing device is one of the key components of centrifugal pump, however, using the mode of rotating shaft sealing, the internal parts are sealed by rotating, and heat is generated between the internal parts due to long-time rotating friction, which increases the friction and causes the internal parts to wear and damage. In order to ensure the service life and flexibility of the internal parts of the device, lubrication is needed inside the device to reduce wear and tear and the smoothness of rotation. And the existing sealing device, the rotating shaft will generate heat while rotating and sealing, so a device that can continuously reduce the temperature of the device needs to be installed inside the device to reduce the working temperature of the sealing device and prevent the sealing element from being damaged due to overheating.

[0005] In order to achieve the above object, the utility model discloses a rotating shaft sealing device for centrifugal pump through the following technical scheme, a sealing shell is connected with the rotating shaft in the inside, the outside of rotating shaft is connected with lubricating mechanism, the inside of sealing shell is equipped with cavity, the inner bottom of cavity is provided with cooling mechanism, the lubricating mechanism includes the rotating connecting piece of rotating connection in the outside of rotating shaft, the left side surface of rotating connecting piece is equipped with the oil inlet hole, the inner bottom of oil inlet hole is connected with the oil pipe of screw thread, the cooling mechanism includes the cooling channel of setting in the inside of sealing shell cavity, the inside of cooling channel is filled with cooling material.

[0006] As a further scheme of the utility model, the bottom of the oil pipe is sleeved with a threaded connector, and the outer side of the bottom surface of the threaded connector is sleeved with a sealing ring. The sealing ring is arranged to achieve the effect of sealing and preventing external leakage.

[0007] As a further scheme of the utility model, the top end of the oil pipe is sleeved with a filter head, the inside of the filter head is provided with a cavity, the top surface of the cavity is provided with threads around, and the outside of the threads is threadedly connected with a threaded connecting ring. The filter head is arranged to achieve the effect of filtering out impurities in the lubricating oil.

[0008] As a further scheme of the utility model, the inside of the threaded connecting ring is threadedly connected with a coarse filter barrel, and the barrel body of the coarse filter barrel is provided with a coarse filter screen around. The coarse filter screen is arranged to achieve the effect of filtering out slightly larger impurities.

[0009] As a further scheme of the utility model, the bottom of the coarse filter barrel is fixedly connected with a connecting rod on both sides, and the bottom of the connecting rod is fixedly connected with a fine filter screen. The fine filter screen is arranged to achieve the effect of filtering out fine impurities.

[0010] As a further scheme of the utility model, the left side of the front end of the rotating connecting piece is fixedly connected with a support rod A, and the right side of the front end of the rotating connecting piece is fixedly connected with a support rod B. The support rod B is arranged to achieve the effect of being connected to support inside the centrifugal pump.

[0011] As a further scheme of the utility model, the inside of the sealing shell is provided with a sealing ring, and the outside of the sealing ring is provided with an annular groove. The elastic element is arranged to achieve the effects of durability and reliability of the sealing effect.

[0012] The utility model provides a rotating shaft sealing device for centrifugal pump, has the following beneficial effect:

[0013] 1. This centrifugal pump uses a rotary shaft sealing device. Through the setting of the lubrication mechanism, when the device needs to perform rotary shaft sealing, the internal parts rotate, blocking external impurities and liquids from the outside of the device. Because the internal parts continue to rotate during rotary shaft sealing, the internal parts generate heat through friction, increasing the friction between the parts and causing wear. Therefore, a rotary connector is installed on the outside of the rotary shaft. The front surface of the rotary connector is equipped with an oil inlet and an oil delivery pipe. Lubricating oil is poured into the device through the oil delivery pipe. Because there are many fine oil leakage holes in the middle of the rotary shaft, the lubricating oil flows into the inside of the device through these holes, providing lubrication for the internal parts. This prevents friction between internal parts due to lack of lubrication, which would cause wear and damage to the internal parts, reduce the service life of the device, and decrease the flexibility of rotation.

[0014] 2. The centrifugal pump uses a rotary shaft seal device. Through the setting of a cooling mechanism, when the device is performing rotary shaft sealing, due to the continuous operation of the rotary shaft sealing, the internal parts are constantly rubbing against each other, which generates corresponding heat. Excessive heat can cause the internal sealing parts to be damaged due to overheating. Therefore, a cooling channel is installed inside the sealing shell, and the inside of the cooling channel is filled with a cooling substance that can continuously lower the temperature, thereby reducing the operating temperature of the sealing device and preventing the sealing parts from being damaged due to overheating caused by the lack of a cooling device. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the lubrication mechanism of this utility model;

[0017] Figure 3 This is a schematic diagram of the cooling mechanism of this utility model;

[0018] Figure 4 This is a schematic diagram of the elastic element structure of this utility model.

[0019] In the diagram: 1. Sealed housing; 2. Rotating shaft; 3. Lubrication mechanism; 301. Rotating connector; 302. Oil supply pipe; 4. Cooling mechanism; 401. Cooling channel; 402. Cooling substance; 5. Threaded connector; 6. Sealing ring; 7. Filter head; 8. Threaded connecting ring; 9. Coarse filter barrel; 10. Connecting rod; 11. Fine filter screen; 12. Support rod A; 13. Support rod B; 14. Sealing ring; 15. Elastic element. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0021] Please see Figures 1 to 4 This utility model provides a technical solution for a rotary shaft sealing device for a centrifugal pump: a rotary shaft sealing device for a centrifugal pump includes a sealing housing 1, a rotating shaft 2 rotatably connected inside the sealing housing 1, a lubrication mechanism 3 rotatably connected outside the rotating shaft 2, a cavity at the beginning of the sealing housing 1, a cooling mechanism 4 at the bottom of the cavity, a rotating connector 301 rotatably connected to the outside of the rotating shaft 2, an oil inlet hole on the left side surface of the rotating connector 301, and an oil delivery pipe 302 threadedly connected to the bottom of the oil inlet hole, and a cooling channel 401 disposed inside the cavity of the sealing housing 1, the cooling channel 401 being filled with a cooling substance 402;

[0022] Please see Figure 2 The bottom of the oil pipeline 302 is fitted with a threaded connector 5, and a sealing ring 6 is fitted on the outside of the bottom surface of the threaded connector 5. The sealing ring 6 is used to seal and prevent external leakage.

[0023] Please see Figure 2 The top end of the oil pipe 302 is fitted with a filter head 7. The filter head 7 has a cavity inside, and the top surface of the cavity is threaded around the perimeter. The external threads are connected to a threaded connecting ring 8. The filter head 7 filters out impurities inside the lubricating oil.

[0024] Please see Figure 2 The threaded connecting ring 8 is internally threaded to a coarse filter barrel 9. A coarse filter screen is installed around the barrel body of the coarse filter barrel 9. The coarse filter screen 9 is used to filter out slightly larger impurities.

[0025] Please see Figure 2 Both sides of the bottom of the coarse filter barrel 9 are fixedly connected to connecting rods 10, and the bottom of the connecting rods 10 is fixedly connected to fine filter screens 11. The fine filter screens 11 are used to filter out fine impurities.

[0026] Please see Figure 1 A support rod A12 is fixedly connected to the left front end of the rotating connector 301, and a support rod B13 is fixedly connected to the right front end of the rotating connector 301. The support rod B13 serves to connect and support the centrifugal pump.

[0027] Please see Figure 4A sealing ring 14 is installed on the inner side of the sealing housing 1. An annular groove is provided on the outer side of the sealing ring 14. An elastic element 15 is installed inside the groove. The setting of the elastic element 15 plays a role in ensuring the durability and reliability of the sealing effect. The elastic element 15 can be an elastic ring.

[0028] In this invention, the working steps of the device are as follows:

[0029] First step: When the device is to perform shaft sealing, the internal parts rotate to block external impurities and liquids from entering the device. Because the internal parts continue to rotate during shaft sealing, friction between the internal parts generates heat, increasing the friction between the parts and causing wear. Therefore, a rotating connector 301 is installed on the outside of the rotating shaft 2. An oil inlet and an oil delivery pipe 302 are installed on the front surface of the rotating connector 301. Lubricating oil is poured into the device through the oil delivery pipe 302. Since there are many fine oil leakage holes in the middle of the rotating shaft 2, the lubricating oil flows into the interior of the device through these holes for lubrication.

[0030] Second step: During the continuous operation of the rotating shaft seal, the internal parts rub against each other, which generates heat. Excessive heat can damage the internal sealing parts due to overheating. Therefore, a cooling channel 401 is installed inside the sealing housing 1, and a cooling substance 402 that can continuously lower the temperature is filled inside the cooling channel 401.

[0031] It should be noted that the device structure and accompanying drawings of this utility model mainly describe the principle of this utility model. In terms of the technical aspects of this design principle, the setting of the power mechanism, power supply system and control system of the device is not fully described. However, under the premise that those skilled in the art understand the principle of the above utility model, the specific details of its power mechanism, power supply system and control system can be clearly understood. The control method in the application document is automatic control through a controller. The control circuit of the controller can be implemented by those skilled in the art through simple programming.

[0032] All standard parts used can be purchased from the market, and can be customized according to the instructions and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the existing technology. The machinery, parts and equipment adopt conventional models in the existing technology, and the structure and principle of the components known to those skilled in the art can be known by those skilled in the art through technical manuals or conventional experimental methods.

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

Claims

1. A rotating shaft sealing device for centrifugal pumps, comprising a sealing housing (1), characterized in that: The inside of the sealing shell (1) is rotatably connected with a rotating shaft (2), the outside of the rotating shaft (2) is rotatably connected with a lubricating mechanism (3), the inside of the sealing shell (1) is provided with a cavity, and the inner bottom of the cavity is provided with a cooling mechanism (4), The lubricating mechanism (3) comprises a rotating connecting piece (301) rotatably connected to the outside of the rotating shaft (2), an oil inlet hole is formed in the left side surface of the rotating connecting piece (301), and the inner bottom of the oil inlet hole is threadedly connected with an oil conveying pipe (302), The cooling mechanism (4) comprises a cooling channel (401) arranged in the cavity of the sealing shell (1), and the inside of the cooling channel (401) is filled with cooling substances (402).

2. A rotating shaft seal device for a centrifugal pump according to claim 1, characterized in that: The bottom of the oil conveying pipe (302) is sleeved with a threaded connector (5), and the bottom surface of the threaded connector (5) is sleeved with a sealing ring (6) on the outside.

3. A rotating shaft seal device for a centrifugal pump according to claim 1, characterized in that: The top end of the oil conveying pipe (302) is sleeved with a filter head (7), the inside of the filter head (7) is provided with a cavity, the top surface of the cavity is provided with threads around, and the outside of the threads is threadedly connected with a threaded connecting ring (8).

4. A rotating shaft seal device for a centrifugal pump according to claim 3, characterized in that: The inside of the threaded connecting ring (8) is threadedly connected with a coarse filter barrel (9), and the barrel body of the coarse filter barrel (9) is provided with a coarse filter screen around.

5. A rotating shaft seal for a centrifugal pump according to claim 4, wherein: The bottom of the coarse filter barrel (9) is fixedly connected with a connecting rod (10) on both sides, and the bottom of the connecting rod (10) is fixedly connected with a fine filter screen (11).

6. A rotating shaft seal for a centrifugal pump according to claim 1, wherein: The front end of the rotating connecting piece (301) is fixedly connected with a support rod A (12) on the left side, and the front end of the rotating connecting piece (301) is fixedly connected with a support rod B (13) on the right side.

7. A rotating shaft seal for a centrifugal pump according to claim 1, wherein: The inside of the sealing shell (1) is provided with a sealing ring (14), the outside of the sealing ring (14) is provided with an annular groove, and the inside of the groove is provided with an elastic element (15).

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