Water seal gland for circulating water pump

Abstract

The utility model belongs to the technical field of circulating water pumps, and particularly relates to a water seal gland for a circulating water pump, which comprises a circulating water pump cooling water outer barrel, a circulating water pump shaft arranged on the surface of the circulating water pump cooling water outer barrel and a packing gland mounted at one end of the circulating water pump cooling water outer barrel. The water seal gland is mounted at one end, far away from the packing gland, of the circulating water pump cooling water outer barrel; a polytetrafluoroethylene protection pad is arranged between the water seal gland and the circulating water pump cooling water outer barrel; according to the water seal gland, the water seal groove is designed to be of a deep groove structure, two water seal rings can be installed in the water seal groove of the water seal gland, and therefore the sealing effect of water seal packing is improved, and when the water seal gland is assembled with a cooling water outer barrel of a circulating water pump, a polytetrafluoroethylene protection pad is installed between assembling faces, and the sealing effect is improved. And the erosion of cooling water in the barrel to the water seal filler is relieved, so that the durability of the water seal filler is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of circulating water pumps, in particular to a water seal gland for a circulating water pump. Background Art

[0002] In thermal power plants, circulating water pumps are important auxiliary equipment for steam turbine units. Their main function is to continuously provide cooling water to the condenser to maintain the heat exchange efficiency of the condensing system, to ensure the vacuum degree of the condensing system and the operating efficiency of the steam turbine unit. The water seal packing (water seal ring) is an indispensable sealing material in the circulating water pump. Its function is to prevent the leakage of cooling water in the circulating water pump, to ensure the stability of the pressure inside the pump body, and to prevent air from entering the system and affecting the normal operation of the pump.

[0003] In the existing cooling water sealing system of circulating water pumps, since the packing groove of the water seal gland can only install one water seal ring, the long-term operation of the circulating water pump causes the water seal ring to wear more and more, and the sealing performance of the water seal ring to the cooling water decreases, causing the cooling water leakage to gradually increase, and the circulating water pump's demand for cooling water replenishment increases. The overhaul cycle of the circulating water pump is two years, but the existing cooling water sealing system often has a doubling of the cooling water replenishment due to the wear of the water seal ring in less than a year of operation, resulting in a waste of industrial cooling water.

[0004] Therefore, a circulating water pump is designed with a water seal gland to solve the above problems. Utility Model Content

[0005] In order to solve the problems raised in the above background technology, the utility model provides a water seal gland for a circulating water pump, which can install more packing fillers in the packing sealing water system, thereby improving the durability and sealing effect of the packing sealing system of the circulating water pump.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a water seal gland for a circulating water pump comprises a circulating water pump cooling water outer cylinder, a circulating water pump pump shaft arranged on the surface of the circulating water pump cooling water outer cylinder and a packing gland installed at one end of the circulating water pump cooling water outer cylinder, and also comprises a water seal gland installed at one end of the circulating water pump cooling water outer cylinder away from the packing gland, a polytetrafluoroethylene protective pad is arranged between the water seal gland and the circulating water pump cooling water outer cylinder, an installation groove and a water seal stuffing groove are opened on the surface of the water seal gland, and the installation groove and the water seal stuffing groove are connected, two water seal rings are arranged in the water seal stuffing groove, and the two water seal rings are installed on the surface of the water seal gland through the water seal stuffing groove.

[0007] As a preferred water seal gland for the circulating water pump of the utility model, a circular hole one is opened on the surface of the polytetrafluoroethylene protective pad, and the pump shaft of the circulating water pump passes through the circular hole one and penetrates the polytetrafluoroethylene protective pad and is slidably connected to the polytetrafluoroethylene protective pad.

[0008] As a preferred water seal gland for the circulating water pump of the utility model, two circular holes are opened on the surfaces of the two water seal rings, and the pump shaft of the circulating water pump passes through the two water seal rings respectively through the two circular holes and is slidably connected with the two water seal rings.

[0009] As a preferred embodiment of the water seal gland for the circulating water pump of the utility model, a circular hole three is opened on the surface of the water seal gland, and the pump shaft of the circulating water pump passes through the circular hole three and penetrates the water seal gland and is slidably connected with the water seal gland.

[0010] As a preferred water seal gland for the circulating water pump of the utility model, the sum of the thicknesses of the two water seal rings is equal to the depth of the water seal filling groove, and the water seal rings and the surface of the pump shaft of the circulating water pump are in contact.

[0011] Compared with the prior art, the beneficial effects of the utility model are: the water seal groove of the water seal gland is designed as a deep groove structure, so that two water seal rings can be installed in the water seal groove of the water seal gland, thereby improving the sealing effect of the water seal filler, and when the water seal gland is assembled with the outer cylinder of the circulating water pump cooling water, a polytetrafluoroethylene protective pad is installed between the assembly surfaces to alleviate the erosion of the water seal filler by the cooling water in the cylinder, thereby improving the durability of the water seal filler. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 This is a schematic diagram of the structure of the polytetrafluoroethylene protective pad in the utility model;

[0015] Figure 3 This is a schematic diagram of the structure of the water seal gland in the utility model;

[0016] Figure 4 This is a schematic diagram of the structure of the water seal ring in the utility model;

[0017] In the figure:

[0018] 1. Cooling water outer cylinder of circulating water pump; 2. Pump shaft of circulating water pump; 3. Packing gland; 4. Water seal gland; 5. Polytetrafluoroethylene protective pad; 6. Water seal ring; 8. Water seal stuffing groove; 9. Round hole three; 10. Installation groove; 11. Round hole two; 12. Round hole one. DETAILED DESCRIPTION

[0019] 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.

[0020] Example 1

[0021] like Figure 1 As shown;

[0022] The water seal gland for the circulating water pump comprises a circulating water pump cooling water outer cylinder 1, a circulating water pump pump shaft 2 arranged on the surface of the circulating water pump cooling water outer cylinder 1, and a packing gland 3 installed at one end of the circulating water pump cooling water outer cylinder 1.

[0023] More specifically:

[0024] like Figures 1 to 4 As shown:

[0025] In combination with the above content: it also includes a water seal gland 4 installed on the end of the circulating water pump cooling water outer cylinder 1 away from the packing gland 3, a polytetrafluoroethylene protective pad 5 is arranged between the water seal gland 4 and the circulating water pump cooling water outer cylinder 1, and an installation groove 10 and a water seal stuffing groove 8 are opened on the surface of the water seal gland 4, and the installation groove 10 and the water seal stuffing groove 8 are connected, and two water seal rings 6 are arranged in the water seal stuffing groove 8, and the two water seal rings 6 are installed on the surface of the water seal gland 4 through the water seal stuffing groove 8.

[0026] In this embodiment: because a water seal stuffing groove 8 is opened in the water seal gland 4, and a polytetrafluoroethylene protective pad 5 is arranged between the water seal gland 4 and the outer cylinder 1 of the circulating water pump cooling water, two water seal rings 6 can be installed on the water seal gland 4 through the water seal stuffing groove 8. This design can improve the durability and sealing effect of the water seal stuffing.

[0027] It should be noted that the water seal gland 4 is made of 316L stainless steel.

[0028] Going further:

[0029] In an optional embodiment, a circular hole 12 is opened on the surface of the polytetrafluoroethylene protection pad 5, and the circulating water pump shaft 2 passes through the circular hole 12 and penetrates the polytetrafluoroethylene protection pad 5 and is slidably connected to the polytetrafluoroethylene protection pad 5.

[0030] In this embodiment, since a circular hole 12 is provided on the surface of the polytetrafluoroethylene protective pad 5, this design can further enhance the sealing effect of the water seal filler.

[0031] It should be noted that the diameter of the circular hole 12 is equal to the diameter of the pump shaft 2 of the circulating water pump.

[0032] Going further:

[0033] In an optional embodiment, a second circular hole 11 is formed on the surface of the two water seal rings 6 , and the circulating water pump shaft 2 passes through the two water seal rings 6 through the second circular hole 11 and is slidably connected to the two water seal rings 6 .

[0034] In this embodiment, since the surface of the water seal ring 6 is provided with a circular hole 11, this design can further enhance the durability of the water seal filler.

[0035] It should be noted that the water seal ring 6 is in contact with the surface of the water seal gland 4 , and the diameter of the second circular hole 11 is equal to the diameter of the pump shaft 2 of the circulating water pump.

[0036] Going further:

[0037] In an optional embodiment, a circular hole three 9 is opened on the surface of the water seal gland 4, and the circulating water pump shaft 2 passes through the water seal gland 4 through the circular hole three 9 and is slidably connected with the water seal gland 4.

[0038] In this embodiment, since the surface of the water seal gland 4 is provided with a circular hole 9, this design can further enhance the durability of the water seal filler.

[0039] It should be noted that the diameters of the circular hole 3 9 , the circular hole 2 11 and the circular hole 1 12 are the same.

[0040] Going further:

[0041] In an optional embodiment, the sum of the thicknesses of the two water seal rings 6 is equal to the depth of the water seal filling groove 8 , and the water seal rings 6 fit the surface of the pump shaft 2 of the circulating water pump.

[0042] In this embodiment, since the sum of the thicknesses of the two water seal rings 6 is equal to the depth of the water seal filler groove 8, this design can further improve the durability and sealing effect of the water seal filler.

[0043] Working principle: because a water seal stuffing groove 8 is opened in the water seal gland 4, and a polytetrafluoroethylene protective pad 5 is arranged between the water seal gland 4 and the outer cylinder 1 of the circulating water pump cooling water, two water seal rings 6 can be installed on the water seal gland 4 through the water seal stuffing groove 8, and the sealing effect of the water seal stuffing is enhanced by the two water seal rings 6, and the erosion of the water seal stuffing by the cooling water in the cylinder body is alleviated by the polytetrafluoroethylene protective pad 5. Because a circular hole 12 is opened on the surface of the polytetrafluoroethylene protective pad 5, a circular hole 2 11 is opened on the surface of the water seal ring 6, and a circular hole 3 9 is opened on the surface of the water seal gland 4, the diameters of the circular hole 3 9, the circular hole 2 11 and the circular hole 1 12 are the same, and the sum of the thicknesses of the two water seal rings 6 is equal to the depth of the water seal stuffing groove 8. By adopting this design, the durability and sealing effect of the water seal stuffing can be improved.

[0044] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A water seal gland for a circulating water pump, comprising a circulating water pump cooling water outer cylinder (1), a circulating water pump pump shaft (2) arranged on the surface of the circulating water pump cooling water outer cylinder (1), and a packing gland (3) installed at one end of the circulating water pump cooling water outer cylinder (1), characterized in that: It also includes a water seal gland (4) installed at one end of the circulating water pump cooling water outer cylinder (1) away from the packing gland (3), a polytetrafluoroethylene protective pad (5) is arranged between the water seal gland (4) and the circulating water pump cooling water outer cylinder (1), a mounting groove (10) and a water seal stuffing groove (8) are opened on the surface of the water seal gland (4), and the mounting groove (10) and the water seal stuffing groove (8) are connected, and two water seal rings (6) are arranged in the water seal stuffing groove (8), and the two water seal rings (6) are installed on the surface of the water seal gland (4) through the water seal stuffing groove (8).

2. The water seal gland for the circulating water pump according to claim 1 is characterized in that: A circular hole (12) is provided on the surface of the polytetrafluoroethylene protective pad (5), and the pump shaft (2) of the circulating water pump passes through the circular hole (12) and penetrates the polytetrafluoroethylene protective pad (5), and is slidably connected to the polytetrafluoroethylene protective pad (5).

3. The water seal gland for the circulating water pump according to claim 1 is characterized in that: The surfaces of the two water seal rings (6) are each provided with a second circular hole (11), and the circulating water pump shaft (2) passes through the second circular hole (11) and penetrates the two water seal rings (6) respectively, and is slidably connected with the two water seal rings (6).

4. The water seal gland for the circulating water pump according to claim 1, characterized in that: A circular hole three (9) is provided on the surface of the water seal gland (4), and the circulating water pump shaft (2) passes through the circular hole three (9) and penetrates the water seal gland (4) and is slidably connected to the water seal gland (4).

5. The water seal gland for the circulating water pump according to claim 1 is characterized in that: The sum of the thicknesses of the two water seal rings (6) is equal to the depth of the water seal filling groove (8), and the surfaces of the water seal rings (6) and the pump shaft (2) of the circulating water pump are in contact with each other.

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