Bulb tubular unit bearing oil return tank oil mist overflow prevention device

Abstract

A bulb tubular unit bearing oil return tank oil mist overflow prevention device comprises a high-level oil tank, an oil return tank, a water guide bearing and an engine guide bearing of a unit, the high-level oil tank is connected with the water guide bearing and the engine guide bearing of the unit through pipelines, and the water guide bearing and the engine guide bearing are connected with the oil return tank through oil ways. The oil return tank is connected with the high-level oil tank through an oil pump, a filter and a cooler in sequence, an oil mist overflow prevention device is arranged on the oil return tank, a cooling pipe is arranged in a shell of the oil mist overflow prevention device, a gas passing space is reserved between the cooling pipe and the inner wall of the shell, and the water inlet end and the water outlet end of the cooling pipe extend out of the shell. An oil mist air inlet and an oil discharging valve are arranged at the lower end of the shell, the oil mist air inlet is connected with the upper end of the oil return tank through a pipeline, and the oil discharging valve is connected with the oil return tank.

Description

Technical Field

[0001] The utility model relates to the field of water wheel engines, in particular to an oil mist overflow prevention device for a bulb tubular unit bearing oil return tank. Background Art

[0002] The generator set of Tongzihao Hydropower Station is a bulb-type hydro-turbine generator. The bearing oil system is equipped with a high-level oil tank and a bearing return oil tank. The bearing oil flows from the high-level oil tank through the unit's guide bearing and water-guided bearing by gravity, provides lubrication and cooling for them, and then enters the bearing return oil tank. After passing through the bearing oil pump, filter and cooler, it returns to the high-level oil tank, and together with the overflow pipe of the high-level oil tank, it forms a bearing oil circulation system. Due to the impact of gravity oil and the influence of high temperature in summer, the unit's bearing return oil tank is very easy to form oil mist inside the tank. After the oil mist overflows the tank, it adheres to the on-site equipment and the ground, which brings great pressure to the on-site environmental management and environmental protection work, and also brings safety hazards to the safety of personnel passage. It is necessary to study and manage the oil mist overflow problem of the oil tank on the basis of ensuring the normal oil return of the oil tank bearing and the oil pump oiling, improve the production site environment, eliminate safety hazards, and meet the environmental protection requirements of the production site. Summary of the invention

[0003] The utility model aims to provide a device for preventing oil mist from overflowing from a bearing oil return tank of a bulb-type cross-flow unit in view of the shortcomings of the prior art. The device can prevent the bearing oil from forming oil mist due to high temperature and then overflowing and adhering to the equipment and the ground at the production site, thereby improving the environment at the production site and eliminating potential safety hazards.

[0004] The purpose of the utility model is achieved as follows: a bulb cross-flow unit bearing oil return tank anti-oil mist overflow device, comprising a high-position oil tank, an oil return tank, a water-guided bearing and a guide bearing of the unit, the high-position oil tank is connected to the water-guided bearing and the guide bearing of the unit through a pipeline, the water-guided bearing and the guide bearing are connected to the oil return tank through an oil circuit, the oil return tank is connected to the high-position oil tank via an oil pump, a filter, and a cooler in sequence, an oil mist overflow prevention device is arranged on the oil return tank, a cooling pipe is arranged in the shell of the oil mist overflow prevention device, a gas passage space is left between the cooling pipe and the inner wall of the shell, the water inlet end and the water outlet end of the cooling pipe extend out of the shell, an oil mist air inlet and an oil drain valve are respectively arranged at the lower end of the shell, the oil mist air inlet is connected to the upper end of the oil return tank through a pipeline, and the oil drain valve is connected to the oil return tank.

[0005] The water inlet end of the cooling pipe is connected to the water inlet pipe, and the water outlet end is connected to the water outlet pipe.

[0006] A plurality of baffles are arranged in the shell, and the cooling pipes are supported on the baffles.

[0007] A front end cover is provided at the front end of the shell, and a rear end cover is provided at the rear end. The front end cover is provided with two concave cavities, one of which is connected to the water inlet pipe and communicates with the water inlet end of the cooling pipe, and the other is connected to the water outlet pipe and communicates with the water outlet end of the cooling pipe. The rear end cover is provided with a concave cavity, which is communicated with the water inlet pipe and the water outlet pipe.

[0008] A stainless steel filter is arranged at the inlet of the oil mist air inlet.

[0009] An exhaust cap is arranged at the outlet end of the cold air outlet on the cooling pipe, and a metal mesh plate and fiber filter paper are arranged inside the exhaust cap.

[0010] A pressure gauge is arranged between the oil return tank and the oil mist inlet.

[0011] The oil mist air inlet is connected to the oil return tank through a stainless steel bellows.

[0012] The oil return tank is divided into a condensing oil collecting tank and a bearing oil return tank by a partition. The condensing oil collecting tank is connected to the oil drain valve, and the bearing oil return tank is connected to the oil mist air inlet.

[0013] Beneficial effects of the utility model:

[0014] 1. After the cooling water in the cooling pipe condenses the oil mist, it is discharged into the oil return tank through the oil drain valve on the shell. The oil mist no longer spreads in the production site and will not adhere to the production equipment and production site, so that the production environment meets environmental protection requirements and eliminates safety hazards.

[0015] 2. The filter installed at the oil mist inlet pipe can filter the oil mist and separate the impurities in the oil mist. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model.

[0017] Figure 2 Schematic diagram of the device to prevent oil mist overflow. DETAILED DESCRIPTION

[0018] See also Figure 1 , Figure 2, a device for preventing oil mist overflow from a return oil tank of a bulb cross-flow unit bearing, comprising a high-position oil tank, a return oil tank, a water-guided bearing and a guide bearing of the unit, wherein the high-position oil tank is connected to the water-guided bearing and the guide bearing of the unit through a pipeline, the water-guided bearing and the guide bearing are connected to the return oil tank through an oil circuit, the return oil tank is connected to the high-position oil tank via an oil pump, a filter, and a cooler in sequence, an oil mist overflow prevention device is arranged on the return oil tank, a cooling pipe 2 is arranged in a housing 1 of the device for preventing oil mist overflow, a gas passage space is reserved between the cooling pipe 2 and the inner wall of the housing 1, the water inlet end and the water outlet end of the cooling pipe 2 extend out of the housing 1, the water inlet end of the cooling pipe 2 is connected to a water inlet pipe 9, and the water outlet end is connected to a water outlet pipe 10. A plurality of baffles 4 are arranged in the housing 1, and the cooling pipe 2 is supported on the baffles 4. The lower end of the shell 1 is provided with an oil mist inlet 5 and an oil drain valve 7, respectively. The oil mist inlet 5 is connected to the upper end of the oil return tank through a pipeline, and the oil drain valve 7 is connected to the oil return tank. The oil mist inlet 5 is connected to the upper end of the oil return tank through a pipeline, and the oil drain valve 7 is connected to the oil return tank. Some accumulated oil is left in the bent pipeline of the oil drain valve 7 to prevent the oil mist in the oil return tank from directly entering the oil mist overflow prevention device from the oil drain valve 7. The front end of the shell 1 is provided with a front cover 8, and the rear end is provided with a rear cover 14. The front cover 8 is provided with two concave cavities, one of which is connected to the water inlet pipe 9 and communicates with the water inlet end of the cooling pipe 2, and the other concave cavity is connected to the water outlet pipe 10 and communicates with the water outlet end of the cooling pipe 2. The rear end cover 14 is provided with a concave cavity, which is communicated with the water inlet pipe 9 and the water outlet pipe 10. Tube sheets are provided between the front and rear end covers and the shell 1 for reinforcement and sealing. A stainless steel filter 6 is provided at the inlet of the oil mist inlet 5. The oil mist inlet 5 is connected to the oil return tank through a stainless steel bellows. The oil mist is initially separated by folding, colliding and gravity settling in the stainless steel bellows. The filter 6 performs secondary filtration on the oil mist to prevent impurities from entering the housing 1 with the oil mist. An exhaust cap 12 is provided at the outlet end of the cold air outlet 13 on the cooling pipe 2. A metal mesh plate and fiber filter paper are provided in the exhaust cap 12. The exhaust cap 12 filters the exhausted gas again. A pressure gauge is provided between the oil return tank and the oil mist inlet 5. The pressure gauge is a digital pressure gauge with a range of -0.1 to 0.1 MPa and an accuracy of 0.1. It is used to monitor the internal pressure of the oil tank. To ensure the normal return of oil to the oil tank and the oil pumping, the internal pressure range of the oil tank is -20 to 20 KPa. A valve is installed at the rear end of the pressure gauge to maintain the pressure in the oil tank. The oil return tank is divided into a condensate oil collecting tank and a bearing oil return tank by a partition. The condensate oil collecting tank is connected to the oil drain valve 7, and the bearing oil return tank is connected to the oil mist inlet 5, so as to recover the bearing lubricating oil and the condensate oil respectively.

Claims

1. A device for preventing oil mist from overflowing from a bearing oil return tank of a bulb-type unit, comprising a high-position oil tank, an oil return tank, a water-guided bearing and a guide bearing of the unit, wherein the high-position oil tank is connected to the water-guided bearing and the guide bearing of the unit through a pipeline, the water-guided bearing and the guide bearing are connected to the oil return tank through an oil circuit, and the oil return tank is connected to the high-position oil tank via an oil pump, a filter and a cooler in sequence, and is characterized in that: An oil mist overflow prevention device is arranged on the oil return tank. A cooling pipe (2) is arranged in a shell (1) of the oil mist overflow prevention device. A gas passage space is reserved between the cooling pipe (2) and the inner wall of the shell (1). The water inlet end and the water outlet end of the cooling pipe (2) extend out of the shell (1). An oil mist air inlet (5) and an oil drain valve (7) are respectively arranged at the lower end of the shell (1). The oil mist air inlet (5) is connected to the upper end of the oil return tank through a pipeline, and the oil drain valve (7) is connected to the oil return tank.

2. The device for preventing oil mist from overflowing from the oil return tank of a bulb tubular unit according to claim 1, characterized in that: The water inlet end of the cooling pipe (2) is connected to the water inlet pipe (9), and the water outlet end is connected to the water outlet pipe (10).

3. The device for preventing oil mist from overflowing from the oil return tank of a bulb tubular unit according to claim 1, characterized in that: A plurality of baffles (4) are provided in the shell (1), and the cooling pipes (2) are supported on the baffles (4).

4. The device for preventing oil mist from overflowing from the oil return tank of a bulb tubular unit according to claim 1, characterized in that: A front end cover (8) is provided at the front end of the housing (1), and a rear end cover (14) is provided at the rear end. The front end cover (8) is provided with two concave cavities, one of which is connected to the water inlet pipe (9) and communicates with the water inlet end of the cooling pipe (2), and the other is connected to the water outlet pipe (10) and communicates with the water outlet end of the cooling pipe (2). The rear end cover (14) is provided with a concave cavity, which is communicated with the water inlet pipe (9) and the water outlet pipe (10).

5. The device for preventing oil mist from overflowing from the oil return tank of a bulb tubular unit according to claim 1, characterized in that: A stainless steel filter (6) is provided at the inlet of the oil mist air inlet (5).

6. The device for preventing oil mist from overflowing from the oil return tank of a bulb tubular unit according to claim 1, characterized in that: An exhaust cap (12) is provided at the outlet end of the cold air outlet (13) on the cooling pipe (2), and a metal mesh plate and fiber filter paper are provided inside the exhaust cap (12).

7. The device for preventing oil mist from overflowing from the oil return tank of a bulb tubular unit according to claim 1, characterized in that: A pressure gauge is provided between the oil return tank and the oil mist inlet (5).

8. The device for preventing oil mist from overflowing from the oil return tank of a bulb tubular unit according to claim 1, characterized in that: The oil mist inlet (5) is connected to the oil return tank via a stainless steel bellows.

9. The device for preventing oil mist from overflowing from the oil return tank of a bulb tubular unit according to claim 1, characterized in that: The oil return tank is divided into a condensing oil collecting tank and a bearing oil return tank by a partition; the condensing oil collecting tank is connected to the oil drain valve (7), and the bearing oil return tank is connected to the oil mist inlet (5).

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