A circulating water pump sealing structure

Abstract

This utility model discloses a sealing structure for a circulating water pump, including a pump body and a bushing mounted on the pump body. A sealing element is installed on the inner surface of the bushing, and a support seat is fixedly connected to the inner surface of the bushing and to one side of the sealing element. A rotating shaft is fixedly connected inside the support seat, and a shaft rod is rotatably connected inside the rotating shaft. A rotating shaft adapted to the shaft rod is fixedly connected inside the sealing element. This utility model relates to the field of circulating water pump technology. This circulating water pump sealing structure initially seals the inside of the bushing by fitting a sealing ring onto the sealing element. Then, by installing an annular airbag in the annular groove, the annular airbag further seals the space between the bushing and the sealing element. Through this double sealing of the inside of the bushing, the bushing is effectively sealed, preventing leakage due to aging of the sealing ring and ensuring the service life of the circulating water pump.

Description

Technical Field

[0001] This utility model relates to the field of circulating water pump technology, specifically a circulating water pump sealing structure. Background Technology

[0002] Circulating water pumps are generally installed in the heating center of a heating station, at the heat source or cold source, etc. Their function is to make water circulate repeatedly in the system and overcome the resistance loss of the loop, hence the name circulating water pump.

[0003] The existing circulating water pump shaft sleeve sealing structure achieves a waterproof sealing effect by opening a sealing groove inside the shaft sleeve and installing a sealing ring inside the sealing groove.

[0004] Since most of the sealing rings are made of rubber, rubber will age after prolonged use due to heat and cold. When the sealing rings begin to age, water will start to seep into the bushing. The water will seep into the bushing, causing water to enter the bearing housing and affecting the normal operation of the circulating water pump. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a circulating water pump sealing structure that solves the problem that rubber ages after prolonged use and heat exchange, and water begins to seep into the bushing when the sealing ring initially ages.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a circulating water pump sealing structure, comprising a pump body and a bushing mounted on the pump body, a sealing element installed on the inner surface of the bushing, a support seat fixedly connected to the inner surface of the bushing and on one side of the sealing element, a rotating shaft fixedly connected inside the support seat, a shaft rod rotatably connected inside the rotating shaft, a rotating shaft adapted to the shaft rod fixedly connected inside the sealing element, an annular groove opened on one side of the sealing element, a sealing ring fixedly installed on one side of the annular groove, and an annular airbag provided on the annular groove and on one side of the sealing ring.

[0007] Preferably, a plurality of sliding cylinders are fixedly connected to one side of the support base, and a sliding rod is slidably connected inside the sliding cylinder.

[0008] Preferably, one end of each of the sliding cylinders is fixedly connected to an annular compression plate adapted to the annular airbag, and a spring is fixedly connected between one side of the inner cavity of the sliding cylinder and the other end of the sliding rod.

[0009] Preferably, the annular airbag is connected to an air intake pipe, one end of which passes through the bushing and extends to the outside of the bushing.

[0010] Preferably, the end of the air intake pipe is provided with an air nozzle.

[0011] Beneficial effects

[0012] This utility model provides a sealing structure for a circulating water pump. Compared with the prior art, it has the following advantages:

[0013] Beneficial effects:

[0014] (1) This utility model performs a preliminary seal on the shaft sleeve by placing the sealing ring on the sealing element, and then installs an annular airbag in the annular groove. The annular airbag will seal the shaft sleeve and the sealing element again. By performing a double seal on the shaft sleeve, the shaft sleeve can be well sealed, effectively preventing the sealing ring from aging and leaking water, and ensuring the service life of the circulating water pump.

[0015] (2) The utility model uses the force of multiple springs to push the sliding rod, and the sliding rod will push the annular extrusion plate to move, so that the annular extrusion plate squeezes the annular airbag, which can effectively fit the annular airbag tightly between the bushing and the seal, thus improving the sealing effect of the bushing. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the external structure of this utility model;

[0017] Figure 2 This is a cross-sectional view of the structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the internal structure of the bushing of this utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the sealing element, rotating shaft, annular groove and sealing ring of this utility model;

[0020] Figure 5 This is a schematic diagram of the structure of the support base, sliding cylinder, sliding rod, spring and annular extrusion plate of this utility model.

[0021] In the diagram: 1. Pump body; 2. Shaft sleeve; 3. Seal; 4. Support base; 5. Rotating shaft; 6. Shaft rod; 7. Rotating shaft; 8. Annular groove; 9. Sealing ring; 10. Annular air bladder; 11. Sliding cylinder; 12. Sliding rod; 13. Spring; 14. Annular extrusion plate; 15. Air inlet pipe; 16. Air nozzle. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0023] Please see Figure 1-5This utility model provides a technical solution: a circulating water pump sealing structure, including a pump body 1 and a bushing 2 installed on the pump body 1. A sealing element 3 is installed on the inner surface of the bushing 2. A support seat 4 is fixedly connected to the inner surface of the bushing 2 and to one side of the sealing element 3. A rotating shaft 5 is fixedly connected inside the support seat 4. A shaft rod 6 is rotatably connected inside the rotating shaft 5. A rotating shaft 7 adapted to the shaft rod 6 is fixedly connected inside the sealing element 3. An annular groove 8 is opened on one side of the sealing element 3. A sealing ring 9 is fixedly installed on one side of the annular groove 8. An annular airbag 10 is provided on the annular groove 8 and to one side of the sealing ring 9. The annular airbag 10 is sleeved on the sealing element 3.

[0024] Furthermore, in order to make the annular airbag 10 fit more tightly against the inner wall for sealing, a number of sliding cylinders 11 are fixedly connected to one side of the support base 4. A sliding rod 12 is slidably connected inside the sliding cylinder 11. An annular extrusion plate 14 adapted to the annular airbag 10 is fixedly connected to one end of the several sliding cylinders 11. A spring 13 is fixedly connected between one side of the inner cavity of the sliding cylinder 11 and the other end of the sliding rod 12.

[0025] Furthermore, to facilitate the inflation of the airbag, an air inlet pipe 15 is connected to the annular airbag 10. One end of the air inlet pipe 15 passes through the bushing 2 and extends to the outside of the bushing 2. An air nozzle 16 is provided at the end of the air inlet pipe 15.

[0026] In use, air is supplied to the air nozzle 16 via an air pump. The air nozzle 16 introduces air into the annular air bladder 10, causing the annular air bladder 10 to gradually expand. The expanded annular air bladder 10 seals the space between the seal 3 and the bushing 2. Through the force of multiple springs 13, the springs 13 push the sliding rod 12, which in turn pushes the annular extrusion plate 14 to move to the left. The annular extrusion plate 14 then pushes and extrudes the annular air bladder 10, tightly fitting it between the bushing 2 and the seal 3. Through the sealing ring 9 and the annular air bladder 10, the seal 3 can be completely sealed.

Claims

1. A circulating water pump sealing structure comprising a pump body (1) and a shaft sleeve (2) mounted on the pump body (1), characterized in that: A seal (3) is installed on the inner surface of the bushing (2). A support (4) is fixedly connected to the inner surface of the bushing (2) and to one side of the seal (3). A rotating shaft (5) is fixedly connected inside the support (4). A shaft (6) is rotatably connected inside the rotating shaft (5). A rotating shaft (7) adapted to the shaft (6) is fixedly connected inside the seal (3). An annular groove (8) is opened on one side of the seal (3). A sealing ring (9) is fixedly installed on one side of the annular groove (8). An annular airbag (10) is provided on the annular groove (8) and to one side of the sealing ring (9).

2. A seal structure for a circulating water pump according to claim 1, wherein: A plurality of sliding cylinders (11) are fixedly connected to one side of the support base (4), and a sliding rod (12) is slidably connected inside the sliding cylinder (11).

3. A seal structure for a circulating water pump according to claim 2, wherein: One end of several of the sliding cylinders (11) is fixedly connected to an annular compression plate (14) adapted to the annular airbag (10), and a spring (13) is fixedly connected between one side of the inner cavity of the sliding cylinder (11) and the other end of the sliding rod (12).

4. A seal assembly for a circulating water pump as defined in claim 1, wherein: The annular airbag (10) is connected to an air inlet pipe (15), one end of which passes through the bushing (2) and extends to the outside of the bushing (2).

5. The circulating water pump sealing structure according to claim 4, characterized in that: An air nozzle (16) is provided at the end of the air intake pipe (15).

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