CN202451826U - Double-mechanical-bearing sealing structure for upright shaft of separable-installed cooling tower hydraulic turbine - Google Patents

Abstract

A split-mounted cooling tower hydraulic turbine vertical shaft double mechanical bearing seal structure, which includes a first mechanical seal structure (1) that functions as an oil barrier and a second mechanical seal structure (2) that functions as a water barrier, and is characterized in that the The above-mentioned first mechanical seal structure (1) is installed on the first mechanical seal gasket (3), the second mechanical seal structure (2) is installed on the second mechanical seal gasket (4), and the first mechanical seal gasket (3) and the second mechanical seal washer (4) are installed on the bearing cover (5), the bearing cover (5) is provided with a drainage hole (6), the upper end surface of the first mechanical seal washer (3) and the bearing (7) The end faces are offset. The utility model has the advantages of simple structure, convenient assembly, maintenance and replacement, low requirement on processing precision, and reduced processing cost.

Description

Split-mounted cooling tower turbine vertical shaft double mechanical bearing seal structure

technical field

   The utility model relates to a cooling tower technology, in particular to a sealing structure for a vertical shaft of a water turbine of a cooling tower, in particular to a split-mounted sealing structure for a vertical shaft of a water turbine of a cooling tower with double mechanical bearings.

Background technique

    At present, the shaft of the water turbine used in the cooling tower is a vertical shaft, the bearing part is lubricated with grease, and the runner works in water. The oil and water must be separated to prevent leakage. For this reason, people use a double mechanical seal structure and add a leakage hole between the two seal structures. As shown in Figure 1, the effect is very good. However, since the mechanical seal structure needs to be installed on the base of the upper cover, the processing requirements for the upper cover are very high, and the assembly and disassembly are also troublesome. Especially when replacing the upper mechanical seal, the bearing must be pulled out, and the adjustment is also difficult. quite complicated.

Contents of the invention

The purpose of this utility model is to design a split-mounted cooling tower water turbine vertical shaft double mechanical bearing seal structure that does not require high machining accuracy and is easy to replace in view of the existing double mechanical seal structure that requires high machining accuracy and is inconvenient to replace. . the

The technical scheme of the utility model is:

A split-mounted cooling tower water turbine vertical shaft double mechanical bearing seal structure, which includes a first mechanical seal structure 1 that functions as an oil barrier and a second mechanical seal structure 2 that functions as a water barrier, and is characterized in that the first The mechanical seal structure 1 is installed on the first mechanical seal gasket 3, the second mechanical seal structure 2 is installed on the second mechanical seal gasket 4, and both the first mechanical seal gasket 3 and the second mechanical seal gasket 4 are installed on the bearing cover 5 , The bearing cover 5 is provided with a drainage through hole 6 , and the upper end surface of the first mechanical seal gasket 3 is in contact with the end surface of the bearing 7 .

The structure of the first mechanical seal structure 1 and the second mechanical seal structure 2 is the same, they are all composed of a first rubber seal ring 8, a static ring 9, a moving ring 10, a second rubber seal ring 11 and a fixed sleeve 12, The fixed sleeve 12 is fixed on the vertical shaft 13 by screws, the first rubber seal ring 8 is installed in the corresponding mounting seat on the first mechanical seal washer 3 or the second mechanical seal washer 4, one side of the static ring 9 is in contact with the first rubber seal ring 8, and its other side is lower than the fixed sleeve 12 and one end face of the moving ring 10 respectively. The rubber sealing ring 11 is sleeved on the vertical shaft 13 and located in the fixed sleeve 12 . the

Both the first mechanical seal washer 3 and the second mechanical seal washer 4 are installed and fixed on the bearing cover 5 by screws. the

The beneficial effects of the utility model:

The utility model increases the mechanical sealing washer seat. When assembling, install the mechanical seal on the mechanical seal gasket first, and then install the two parts together on the upper cover from the bottom. When disassembling, take the mechanical seal gasket seat directly, and then replace the mechanical seal on the gasket seat. The whole assembly process and disassembly process have nothing to do with the bearing, and the bearing does not need to be affected, which is very convenient.

The utility model has the advantages of simple structure, convenient assembly, maintenance and replacement, low requirement on processing precision, and reduced processing cost. the

Description of drawings

Fig. 1 is a schematic diagram of an existing double mechanical seal structure. the

Fig. 2 is a schematic diagram of the structure of the double mechanical seal of the present invention. the

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is described further. the

as shown in picture 2. the

A split-mounted cooling tower water turbine vertical shaft dual mechanical bearing seal structure, which includes a first mechanical seal structure 1 for oil isolation and a second mechanical seal structure 2 for water isolation. In order to facilitate assembly and reduce processing accuracy, The utility model installs the first mechanical seal structure 1 on the first mechanical seal gasket 3, the upper end surface of the first mechanical seal gasket 3 is offset against the end surface of the bearing 7, and the second mechanical seal structure 2 is installed on the second mechanical seal gasket 4 Above, the first mechanical seal washer 3 and the second mechanical seal washer 4 are installed on the corresponding positions of the bearing cover 5 by screws. If the bearing lubricating oil causes pollution, the bearing cover 5 is processed with a drainage through hole 6, and the water leaking from the structure of the second mechanical seal 2 can leak through the drainage through hole 6 and be found in time. The structure of the first mechanical seal structure 1 and the second mechanical seal structure 2 of the utility model is the same, and they can be composed of the first rubber sealing ring 8, the static ring 9, the moving ring 10, the second rubber sealing ring 11 and the fixed sleeve 12 , the fixed sleeve 12 is fixed on the vertical shaft 13 by screws, the first rubber seal ring 8 is installed in the corresponding mounting seat on the first mechanical seal washer 3 or the second mechanical seal washer 4, one side of the static ring 9 is in contact with the first rubber seal The ring 8 is offset, and its other side is respectively lower than the fixed sleeve 12 and one end surface of the moving ring 10. The moving ring 10 is installed in the fixed sleeve 12, and the other end surface of the moving ring 10 is offset against the second rubber sealing ring 11. Two rubber sealing rings 11 are sleeved on the vertical shaft 13 and located in the fixed sleeve 12 . As shown in Figure 1. the

The utility model increases the mechanical seal washer. When assembling, the mechanical seal structure is first installed on the mechanical seal washer, and then the two parts are installed together on the bearing cover (upper cover) from the bottom. When disassembling, the mechanical seal washer is directly taken off. , and then replace the mechanical seal structure on the mechanical seal gasket. The whole assembly process and the dismounting process have nothing to do with the bearing 7, and the bearing need not be affected, which is very convenient. the

The parts not involved in the utility model are all the same as the prior art or can be realized by adopting the prior art. the

Claims (3)

1. partial installation formula cooling tower water turbine vertical shaft two-shipper tool bearing seal structure; It has comprised first mechanical seal structure (1) of oil removal effect and has played second mechanical seal structure (2) of impermeable role; It is characterized in that described first mechanical seal structure (1) is installed on the first mechanical seal packing ring (3); Second mechanical seal structure (2) is installed on the second mechanical seal packing ring (4); The first mechanical seal packing ring (3) and the second mechanical seal packing ring (4) are installed on the bearing cap (5), and bearing cap (5) is provided with drainage hole (6), and the end face of the upper-end surface of the first mechanical seal packing ring (3) and bearing (7) offsets.

2. partial installation formula cooling tower water turbine vertical shaft two-shipper tool bearing seal structure according to claim 1; It is characterized in that described first mechanical seal structure (1) is identical with the structure of second mechanical seal structure (2); They are formed by first rubber seal (8), stationary ring (9), rotating ring (10), second rubber seal (11) and fixed cover (12); Fixed cover (12) passes through screw on vertical shaft (13); First rubber seal (8) is installed in the first mechanical seal packing ring (3) or the second mechanical seal packing ring (4) is gone up in the corresponding fitting seat; The one side of stationary ring (9) offsets with first rubber seal (8), and its an another side end face with fixed cover (12) and rotating ring (10) respectively is mutually low, and rotating ring (10) is installed in the fixed cover (12); Another end face of rotating ring (10) and second rubber seal (11) offset, and second rubber seal (11) is sleeved on the vertical shaft (13) and is arranged in fixed cover (12).

3. partial installation formula cooling tower water turbine vertical shaft two-shipper tool bearing seal structure according to claim 1 is characterized in that the described first mechanical seal packing ring (3) and the second mechanical seal packing ring (4) all are fixed on the bearing cap (5) through screw.

Images