Mechanical sealing structure of chemical pump

Abstract

The utility model discloses a chemical pump mechanical sealing structure, which relates to the mechanical sealing field, and comprises a pump shell and a pump shaft, the side wall of the pump shell is provided with a static ring groove, the static ring groove is internally connected with a static ring, the inner wall of the static ring is provided with a plurality of first sealing grooves, and the first sealing grooves are internally connected with first O-shaped sealing rings; a cooling cavity corresponding to the first sealing groove is formed in the static ring, and a plurality of first water passing openings are formed in the left side of the cooling cavity. By means of the cooling cavity, water in the impeller cavity on the chemical pump enters the static ring groove and enters the cooling cavity through the first water passing opening in the static ring, heat exchange and cooling are conducted on the first O-shaped sealing ring in the first sealing groove, and due to the fact that the water in the impeller groove is in a flowing state due to stirring of an impeller, the water in the impeller groove is cooled. Therefore, water in the cooling cavity flows out through the second water passing opening, the operation is repeated, the first O-shaped sealing ring on the static ring can be effectively cooled, and the problem that the sealing effect is affected due to the fact that the first O-shaped sealing ring is heated is avoided.

Description

Technical Field

[0001] The utility model relates to the field of mechanical seals, in particular to a chemical pump mechanical seal structure. Background Art

[0002] The chemical pump is an energy-saving pump designed jointly by the whole country. Its advantages are: reasonable layout of the whole series of hydraulic performance, wide range of user choices, "rear opening" structure, convenient maintenance, efficiency and suction range reaching the international advanced level. Mechanical seal is the most widely used sealing form in the chemical pump industry. Because mechanical seal has the advantages of less leakage and long life, mechanical seal is the most important shaft sealing method in these equipment in the world today.

[0003] At present, when the mechanical seal of a chemical pump is used, the pump shaft will produce friction with the O-ring on the static ring when rotating, which can easily cause the O-ring on the static ring to heat up, causing the O-ring to deform due to the heat, which will affect the sealing effect of the O-ring.

[0004] Therefore, it is necessary to invent a chemical pump mechanical seal structure to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a chemical pump mechanical seal structure to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a chemical pump mechanical seal structure, including a pump casing and a pump shaft, a side wall of the pump casing is provided with a static ring groove, a static ring is connected in the static ring groove, a plurality of first sealing grooves are provided on the inner wall of the static ring, and a first O-ring is connected in the first sealing groove, a cooling cavity corresponding to the first sealing groove is provided in the static ring, a plurality of first water openings are provided on the left side of the cooling cavity, a plurality of second water openings are provided on the outside of the cooling cavity, a pressure cover is provided on the outside of the pump shaft, mounting holes are provided around the pressure cover and the pump casing, and mounting bolts are connected in the mounting holes, a dynamic ring groove is provided in the pressure cover, and a compensation spring is connected in the dynamic ring groove, a clamping ring is connected to the other end of the compensation spring, a dynamic ring is provided on the side wall of the clamping ring, and the dynamic ring abuts against the side wall of the static ring.

[0007] Preferably, a sealing gasket is provided between the gland and the pump casing.

[0008] Preferably, a second sealing groove is provided on the outer side of the dynamic ring, and a second O-ring is arranged in the second sealing groove.

[0009] Preferably, the sealing gasket, the first O-ring and the second O-ring are all made of rubber.

[0010] Technical effects and advantages of the utility model:

[0011] Through the provided cooling chamber, the water in the impeller chamber on the chemical pump enters the static ring groove, and enters the cooling chamber through the first water port on the static ring, so as to perform heat exchange and cooling on the first O-ring in the first sealing groove. Since the water in the impeller groove is in flow due to the stirring of the impeller, the water in the cooling chamber flows out through the second water port. This is repeated, so as to effectively cool the first O-ring on the static ring and avoid the problem of heat affecting the sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0013] Figure 2 For this utility model Figure 1 A schematic diagram of the enlarged structure of part A;

[0014] Figure 3 For this utility model Figure 1 Schematic diagram of the enlarged structure of part B.

[0015] In the figure: 1. Pump casing; 2. Pump shaft; 3. Stationary ring; 4. First O-ring; 5. Cooling chamber; 6. First water outlet; 7. Second water outlet; 8. Pressure cover; 9. Mounting bolts; 10. Compensation spring; 11. Moving ring; 12. Sealing gasket; 13. Second O-ring; 14. Clamping ring. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] The utility model provides Figure 1-3A chemical pump mechanical seal structure shown in the figure includes a pump housing 1 and a pump shaft 2. A stationary ring groove is provided on the side wall of the pump housing 1, a stationary ring 3 is connected in the stationary ring groove, a plurality of first sealing grooves are provided on the inner wall of the stationary ring 3, and a first O-type sealing ring 4 is connected in the first sealing groove. A cooling cavity 5 corresponding to the first sealing groove is provided in the stationary ring 3, a plurality of first water openings 6 are provided on the left side of the cooling cavity 5, and a plurality of second water openings 7 are provided on the outer side of the cooling cavity 5. Through the provided cooling cavity 5, water in the impeller cavity of the chemical pump enters the stationary ring groove, and enters the cooling cavity 5 through the first water opening 6 on the stationary ring 3, so as to cool the first O-type sealing ring 4 in the first sealing groove. Heat exchange cooling is carried out, and because the water in the impeller groove is in flow due to the stirring of the impeller, the water in the cooling chamber 5 flows out through the second water port 7, and this is repeated, which can effectively cool the first O-ring 4 on the static ring 3 to avoid the problem of heat affecting the sealing effect. A pressure cover 8 is provided on the outside of the pump shaft 2, and mounting holes are provided on the four sides of the pressure cover 8 and the pump casing 1, and mounting bolts 9 are connected in the mounting holes. A dynamic ring groove is provided in the pressure cover 8, and a compensation spring 10 is connected in the dynamic ring groove. The other end of the compensation spring 10 is connected to a clamping ring 14, and the side wall of the clamping ring 14 is provided with a dynamic ring 11, and the dynamic ring 11 is against the side wall of the static ring 3.

[0018] A sealing gasket 12 is provided between the gland 8 and the pump housing 1 , which can conveniently increase the sealing between the gland 8 and the pump housing 1 .

[0019] A second sealing groove is provided on the outer side of the dynamic ring 11 , and a second O-ring 13 is arranged in the second sealing groove, which can conveniently increase the sealing performance of the dynamic ring 11 .

[0020] The sealing gasket 12 , the first O-ring 4 , and the second O-ring 13 are all made of rubber.

[0021] Working principle of this utility model:

[0022] By installing the static ring 3 in the static ring groove and installing the pressure cover 8 with the pump casing through the mounting bolts 9, the compensation spring in the pressure cover 8 pushes the clamping ring 14, and the clamping ring 14 is used to push the dynamic ring 11 to contact the static ring 3, and the sealing performance of the mechanical seal is increased by the provided sealing gasket 12, the first O-ring 4 and the second O-ring 13. Through the provided cooling chamber 5, the water in the impeller chamber on the chemical pump enters the static ring groove, and enters the cooling chamber 5 through the first water port 6 on the static ring 3, and the first O-ring 4 in the first sealing groove is subjected to heat exchange and cooling. Since the water in the impeller groove is in flow due to the stirring of the impeller, the water in the cooling chamber 5 flows out through the second water port 7.

[0023] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A chemical pump mechanical seal structure, comprising a pump housing and a pump shaft, characterized in that: The side wall of the pump housing is provided with a static ring groove, a static ring is connected to the static ring groove, the inner wall of the static ring is provided with a plurality of first sealing grooves, and a first O-ring is connected to the first sealing groove, a cooling cavity corresponding to the first sealing groove is provided in the static ring, a plurality of first water openings are provided on the left side of the cooling cavity, a plurality of second water openings are provided on the outside of the cooling cavity, a pressure cover is provided on the outside of the pump shaft, mounting holes are provided around the pressure cover and the pump housing, and mounting bolts are connected to the mounting holes, a dynamic ring groove is provided in the pressure cover, and a compensation spring is connected to the dynamic ring groove, the other end of the compensation spring is connected to a clamping ring, a dynamic ring is provided on the side wall of the clamping ring, and the dynamic ring abuts against the side wall of the static ring.

2. A chemical pump mechanical seal structure according to claim 1, characterized in that: A sealing gasket is arranged between the gland and the pump housing.

3. A chemical pump mechanical seal structure according to claim 2, characterized in that: A second sealing groove is provided on the outer side of the dynamic ring, and a second O-type sealing ring is arranged in the second sealing groove.

4. A chemical pump mechanical seal structure according to claim 3, characterized in that: The sealing gasket, the first O-ring and the second O-ring are all made of rubber.

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