Chemical centrifugal pump

Abstract

The utility model discloses a chemical centrifugal pump. The chemical centrifugal pump includes a pump shaft, a pump chamber assembly, an impeller, a front shaft sleeve, a rear shaft sleeve, a moving ring, a static ring, a pressure spring and a water seal ring inside the pump chamber assembly, the front end of the pump shaft is inside the pump chamber assembly, and the rear end extends out of the pump chamber assembly; the impeller is installed at the front end of the pump shaft, the front shaft sleeve and the rear shaft sleeve are both sleeved on the outside of the pump shaft, the front end of the front shaft sleeve extends into the impeller, and the rear end abuts against the rear shaft sleeve; the moving ring and the static ring are both on the outside of the front shaft sleeve, the pressure spring is sleeved on the outside of the front shaft sleeve and the rear shaft sleeve, the water seal ring is sleeved on the outside of the rear shaft sleeve, one end of the moving ring, the static ring, the pressure spring and the water seal ring abut against in sequence, the other end of the water seal ring abuts against the rear shaft sleeve, and the outside of the water seal ring of the rear shaft sleeve is provided with a water seal seat. The chemical centrifugal pump improves the water sealing property compared with similar products, and solves the leakage problem of the machine seal connected with cooling water.

Description

Technical Field

[0001] This utility model relates to the field of pumps, and in particular to a chemical centrifugal pump. Background Technology

[0002] Existing chemical centrifugal pumps often have insufficient water sealing, making it difficult to solve the problem of leakage of external cooling water to the mechanical seal. Utility Model Content

[0003] To address the aforementioned problems, this utility model provides a chemical centrifugal pump that improves water sealing performance compared to similar products, thus solving the leakage problem of external cooling water connected to the mechanical seal.

[0004] According to one aspect of the present invention, a chemical centrifugal pump is provided, comprising a pump shaft, a pump chamber assembly, and an impeller, a front shaft sleeve, a rear shaft sleeve, a dynamic ring, a stationary ring, a pressure spring, and a water seal ring located inside the pump chamber assembly. The front end of the pump shaft is located inside the pump chamber assembly, and the rear end extends out of the pump chamber assembly. The impeller is installed at the front end of the pump shaft, and the front shaft sleeve and the rear shaft sleeve are both sleeved on the outside of the pump shaft. The front end of the front shaft sleeve extends into the impeller, and the rear end abuts against the rear shaft sleeve. Both the moving ring and the stationary ring are located outside the front axle sleeve. The pressure spring is fitted outside both the front axle sleeve and the rear axle sleeve. The water seal ring is fitted outside the rear axle sleeve. One end of each of the moving ring, the stationary ring, the pressure spring, and the water seal ring abuts against each other in sequence. The other end of the water seal ring abuts against the rear axle sleeve. A water seal seat is fitted around the water seal ring of the rear axle sleeve.

[0005] In some embodiments, the rear end of the pump shaft is fitted with a bearing housing, and an oil cup is mounted on the bearing housing. The advantage is that the structure of the rear end of the pump shaft is described, in which the oil cup is provided for injecting lubricating oil.

[0006] In some embodiments, a bracket is mounted at the rear end of the bearing housing. This is advantageous because the bracket provides support for the rear end of the bearing housing.

[0007] In some embodiments, a corrosion-resistant cap is provided at the front end of the impeller. The advantage is that the structure of the impeller is further described.

[0008] In some embodiments, the pump chamber assembly includes a pump chamber body and a pump chamber cover, with the impeller located inside the pump chamber body and the pump chamber cover mounted on the rear side of the pump chamber body and fitted over the front shaft sleeve. The advantage is that the structure of the pump chamber assembly is described.

[0009] In some embodiments, a front clamping plate is installed on the front side of the pump chamber body, and a rear clamping plate is installed on the rear side, with the pump chamber cover located between the pump chamber body and the rear clamping plate. Its advantage lies in the further description of the specific structure of the pump chamber assembly.

[0010] In some embodiments, a stationary ring seat is fitted over the outside of the stationary ring, and the stationary ring seat is located inside the pump chamber cover. The advantage of this is that the stationary ring seat can be used to support the stationary ring.

[0011] In some embodiments, the pressure spring is fitted with a spring seat, which is sandwiched between the water seal seat and the pump chamber cover. This is advantageous because the spring seat can be used to support the pressure spring. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of a chemical centrifugal pump according to one embodiment of the present invention; Figure 2 for Figure 1 The diagram shows a partial structure of a chemical centrifugal pump. Figure 1 ; Figure 3 for Figure 1 The diagram shows a partial structure of a chemical centrifugal pump. Figure 2 .

[0013] In the diagram: 1. Pump shaft; 2. Pump chamber assembly; 3. Impeller; 4. Front shaft sleeve; 5. Rear shaft sleeve; 6. Dynamic ring; 7. Stationary ring; 8. Pressure spring; 9. Water seal ring; 10. Water seal seat; 11. Bearing seat; 12. Oil cup; 13. Bracket; 14. Anti-corrosion cap; 15. Pump chamber body; 16. Pump chamber cover; 17. Front clamping plate; 18. Rear clamping plate; 19. Stationary ring seat; 20. Spring seat; 21. O-ring seal. Detailed Implementation

[0014] The present invention will now be described in further detail with reference to the accompanying drawings.

[0015] like Figure 1-3 As shown, the chemical centrifugal pump mainly includes a horizontally extending pump shaft 1, a pump chamber assembly 2, and an impeller 3, a front shaft sleeve 4, a rear shaft sleeve 5, a dynamic ring 6, a stationary ring 7, a pressure spring 8, and a water seal ring 9 located inside the pump chamber assembly 2. One end of the pump shaft 1 (referred to as the front end and the other end as the rear end) is located inside the pump chamber assembly 2, while the rear end extends outside the assembly. The impeller 3 is fixedly mounted on the front end of the pump shaft 1. Both the front shaft sleeve 4 and the rear shaft sleeve 5 are fitted onto the outside of the pump shaft 1, with the front end of the front shaft sleeve 4 extending into the impeller 3 and the rear end abutting against the rear shaft sleeve 5.

[0016] Both the moving ring 6 and the stationary ring 7 are outside the front axle sleeve 4. The pressure spring 8 is fitted outside both the front axle sleeve 4 and the rear axle sleeve 5. The water seal ring 9 is fitted outside the rear axle sleeve 5. One end of each of the moving ring 6, stationary ring 7, pressure spring 8, and water seal ring 9 abuts against each other in sequence, while the other end of the water seal ring 9 also abuts against the rear axle sleeve 5.

[0017] In addition, a water seal seat 10 is also fitted together on the outside of the rear axle sleeve 5 and the water seal ring 9.

[0018] The presence of the water seal ring 9 and the water seal seat 10 improves the water sealing performance of the chemical centrifugal pump and solves the problem of leakage of external cooling water to the mechanical seal.

[0019] Preferably, a bearing housing 11 is fitted at the rear end of the pump shaft 1, and an oil cup 12 for oil injection is installed on the bearing housing 11.

[0020] More preferably, a bracket 13 is installed at the bottom rear end of the bearing housing 11, which can be used to support the rear end of the bearing housing 11.

[0021] Preferably, a corrosion-resistant cap 14 is provided at the front end of the impeller 3.

[0022] The pump chamber assembly 2 mainly consists of a pump chamber body 15 and a pump chamber cover 16. The impeller 3 is located inside the pump chamber body 15, while the pump chamber cover 16 is installed on the rear side of the pump chamber body 15 and is fitted onto the outside of the front shaft sleeve 4.

[0023] Preferably, a front clamping plate 17 is installed on the front side of the pump chamber body 15, and a rear clamping plate 18 is installed on the rear side, while the pump chamber cover 16 is located between the pump chamber body 15 and the rear clamping plate 18.

[0024] Preferably, a stationary ring seat 19 is fitted over the outside of the stationary ring 7 to support the stationary ring 7, and the stationary ring seat 19 is located inside the pump chamber cover 16, that is, sandwiched between the stationary ring 7 and the pump chamber cover 16.

[0025] Preferably, a spring seat 20 is provided on the outside of the pressure spring 8 to support the pressure spring 8, and the spring seat 20 is sandwiched between the water seal seat 10 and the pump chamber cover 16, that is, the water seal seat 10 is on its rear side and the pump chamber cover 16 is on its front side.

[0026] In addition, O-rings 21 are generally provided at the points where the above structures come into contact, which can further play a sealing role.

[0027] The above descriptions are merely some embodiments of this utility model. For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this utility model, and all such modifications and improvements fall within the protection scope of this utility model.

Claims

1. A chemical centrifugal pump, characterized in that: It includes a pump shaft (1), a pump chamber assembly (2), and an impeller (3), a front shaft sleeve (4), a rear shaft sleeve (5), a moving ring (6), a stationary ring (7), a pressure spring (8), and a water seal ring (9) located inside the pump chamber assembly (2). The front end of the pump shaft (1) is located inside the pump chamber assembly (2), and the rear end extends out of the pump chamber assembly (2). The impeller (3) is installed at the front end of the pump shaft (1). The front shaft sleeve (4) and the rear shaft sleeve (5) are both sleeved on the outside of the pump shaft (1). The front end of the front shaft sleeve (4) extends into the impeller (3), and the rear end abuts against the rear shaft sleeve (5). The moving ring (6) and the stationary ring (7) are both outside the front axle sleeve (4). The pressure spring (8) is simultaneously sleeved outside the front axle sleeve (4) and the rear axle sleeve (5). The water seal ring (9) is sleeved outside the rear axle sleeve (5). One end of the moving ring (6), the stationary ring (7), the pressure spring (8) and the water seal ring (9) abuts in sequence. The other end of the water seal ring (9) abuts against the rear axle sleeve (5). A water seal seat (10) is sleeved on the outside of the water seal ring (9) of the rear axle sleeve (5).

2. A chemical centrifugal pump according to claim 1, characterized in that: The rear end of the pump shaft (1) is fitted with a bearing housing (11), and an oil cup (12) is installed on the bearing housing (11).

3. A chemical centrifugal pump according to claim 2, characterized in that: A bracket (13) is installed at the bottom of the rear end of the bearing housing (11).

4. A chemical centrifugal pump according to claim 1, characterized in that: The front end of the impeller (3) is provided with a corrosion protection cap (14).

5. A chemical centrifugal pump according to claim 1, characterized in that: The pump chamber assembly (2) includes a pump chamber body (15) and a pump chamber cover (16). The impeller (3) is located inside the pump chamber body (15), and the pump chamber cover (16) is installed on the rear side of the pump chamber body (15) and sleeved on the outside of the front shaft sleeve (4).

6. A chemical centrifugal pump according to claim 5, characterized in that: A front clamping plate (17) is installed on the front side of the pump chamber body (15), and a rear clamping plate (18) is installed on the rear side. The pump chamber cover (16) is located between the pump chamber body (15) and the rear clamping plate (18).

7. A chemical centrifugal pump according to claim 5, characterized in that: The stationary ring (7) is fitted with a stationary ring seat (19), and the stationary ring seat (19) is located inside the pump chamber cover (16).

8. A chemical centrifugal pump according to claim 5, characterized in that: The pressure spring (8) is fitted with a spring seat (20), which is sandwiched between the water seal seat (10) and the pump chamber cover (16).

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