Horizontal water turbine generator bearing high efficiency lubricating device

Abstract

The utility model provides a kind of adjustable efficient lubricating device for horizontal water turbine generator bearing, comprising: oil inlet is communicated with bearing lubricating oil cavity by hose, oil inlet outlet is connected with motor-driven gear oil pump by its branch pipe with ball valve and limit switch, gear oil pump is connected with connector inlet, while the other inlet of connector is connected with the one end of overflow pipe with overflow valve, ball valve, limit switch on it, the other end of overflow pipe is connected with the overflow inlet of oil inlet, the outlet of connector is connected with the inlet of double-cylinder oil filter with manual switch valve on it, the outlet of double-cylinder oil filter is connected with the jacking hole in the bottom of bearing hot bearing shell by connecting pipe. By pressurized lubricating oil jacking rotating shaft, establish oil film, increase oil film thickness, stiffness, forced lubrication is carried out to high load bearing, reduce bearing shell temperature, avoid thermal deformation, ensure bearing shell safety, without additional configuration independent external circulation system and cooling device.

Description

Technical Field

[0001] This utility model provides a high-efficiency lubrication device, particularly a high-efficiency lubrication device for horizontal hydro generator bearings, belonging to the field of horizontal hydro generator bearing lubrication technology. Background Technology

[0002] Currently, with the continuous expansion of the installed capacity of horizontal hydro-generators in China, the journal diameter of some horizontal hydro-generator bearings has reached over 600mm. Due to the increased bearing load and bearing area in these horizontal hydro-generators, the unit pressure is higher. Therefore, a high-pressure oil jacking device is required during unit startup and shutdown to help establish an oil film on the bearing, reduce bearing temperature, prevent thermal deformation, and ensure bearing safety. However, existing high-pressure oil jacking devices are only used before unit startup and shutdown. Furthermore, for large-capacity horizontal hydro-generators, if internal circulation bearings are used, the high linear velocity at the journal and the limited bearing size necessitate a forced external circulation device and cooler for forced lubrication and cooling of the bearing. This not only requires a large footprint, complex equipment, numerous pipelines, and high cost, but also necessitates improvements to existing technologies. Utility Model Content

[0003] To address the problems of large footprint, numerous pipelines, and complex equipment associated with the use of internal circulation bearings in existing large-capacity horizontal hydro generators, this invention provides a high-efficiency lubrication device for horizontal hydro generator bearings.

[0004] This utility model is achieved through the following technical solution: an adjustable high-efficiency lubrication device for a horizontal hydro-generator bearing, comprising: an oil inlet connected to the bearing lubrication oil chamber via a hose; the oil outlet of the oil inlet connected to a gear oil pump driven by a motor via a branch pipe equipped with a ball valve and a limit switch; the gear oil pump connected to a connector inlet; and the other inlet of the connector connected to one end of an overflow pipe equipped with an overflow valve, a ball valve, and a limit switch; the other end of the overflow pipe connected to the overflow inlet of the oil inlet; the connector outlet connected to the inlet of a double-cylinder oil filter equipped with a manual switching valve; and the outlet of the double-cylinder oil filter connected to the lifting hole at the bottom of the bearing hot bearing bush via a connecting pipe. The lubricating oil in the bearing oil chamber is fed into the oil inlet through the oil inlet, then into the gear oil pump driven by the motor through the oil outlet and its branch pipe equipped with a ball valve and limit switch. During the rotation of the gear oil pump, the lubricating oil is pressurized and then fed through the hose and overflow pipe. This overflow lubricating oil is then fed through a one-way valve into a double-cylinder oil filter controlled by a manually operated switching valve for filtration. Afterward, the pressurized lubricating oil is fed into the gap between the bearing bush and the journal through the outlet, connecting pipe, and the lifting hole at the bottom of the bearing hot bearing bush. This lifts the rotating shaft, establishes an oil film, and increases the thickness and rigidity of the oil film. Ultimately, while lubricating the bearing bush, it also reduces the bearing bush temperature, prevents thermal deformation, and ensures bearing bush safety. Simultaneously, the flow (overflow and lubricating oil) into the double-cylinder oil filter is controlled by the manually operated switching valve. Combined with the operation of the overflow pipe, overflow valve, ball valve, and limit switch, the oil pressure of the lubricating oil fed into the bottom of the bearing bush can be adjusted to meet the needs of lifting the rotating shaft, establishing an oil film, and increasing the thickness and rigidity of the oil film.

[0005] Furthermore, the dual-cylinder oil filter is mounted on the base plate via a support frame, and a manual switching valve is provided on the outside. The connector is located on the support frame and above the dual-cylinder oil filter, so that only one oil filter of the dual-cylinder oil filter can be operated by switching the valve.

[0006] Furthermore, the oil inlet device has one oil inlet, two oil outlets, and two overflow inlets, wherein: the oil inlet is connected to the bearing oil chamber via a hose for drawing lubricating oil from the bearing oil chamber; The two oil outlets are connected to the corresponding gear oil pumps driven by motors through branch pipes equipped with ball valves and limit switches, and then connected to the corresponding oil inlets of the connectors, and finally connected to the dual-cylinder oil filter controlled by a manual switching valve. The two overflow inlets are connected to their respective overflow pipes equipped with overflow valves, ball valves, and limit switches, for precise adjustment of system pressure.

[0007] Furthermore, the connector outlet is connected to the oil outlet pipe with a pressure gauge on it via a branch pipe equipped with a one-way valve to prevent backflow of lubricating oil. The oil outlet pipe is connected to a double-cylinder oil filter with a manual switching valve on it. The pressure gauge is connected to the PLC control system via a wire to indicate the system oil pressure.

[0008] Furthermore, the ball valve and limit switch on the branch pipe, and the ball valve and limit switch on the overflow pipe are respectively connected to the PLC control system via wires to indicate whether the branch pipe and overflow pipe are open or closed.

[0009] Furthermore, at least two motor-driven gear oil pumps are provided on the substrate to support non-stop switching and maintenance.

[0010] This utility model has the following advantages and effects: Through the above technical solution, especially through the pressurized lubricating oil, the rotating shaft can be lifted by 0.03~0.05mm to establish an oil film, increase the oil film thickness and rigidity, realize forced lubrication of high-load bearings, reduce bearing temperature, avoid thermal deformation, and ensure bearing safety. There is no need to configure an additional independent external circulation system and cooling device, reducing the equipment footprint and effectively reducing costs. By having two motor-driven gear oil pumps work alternately as backups for each other, and by manually switching the operation of the dual-cylinder oil filter online, long-term, continuous, and stable operation is ensured, enabling equipment maintenance without shutting down the machine, effectively increasing reliability and service life. By controlling the motor switching start and the limit switch indicating the pipeline status, 8-hour switching operation can be safely and reliably achieved, improving the overall bearing load limit and lubrication performance, laying a technical foundation for further increasing the capacity of horizontal hydro-generator units. Attached Figure Description

[0011] Figure 1 This is a simplified schematic diagram of the principle of this utility model; Figure 2 This is the front view of the present utility model; Figure 3 for Figure 2 Top view; Figure 4 for Figure 2 The left view. Detailed Implementation

[0012] The present invention will now be further described with reference to the accompanying drawings.

[0013] The adjustable high-efficiency lubrication device for horizontal hydro-generator bearings provided by this invention can be installed on a base plate 9, which can be fixed next to the bearing. The adjustable high-efficiency lubrication device includes: an oil inlet 2 connected to the bearing lubrication oil chamber 1 via a hose; an oil outlet 23 of the oil inlet 2 connected to a gear oil pump 3 driven by a motor 31 via a branch pipe 25 equipped with a ball valve 26 and a limit switch 24; a gear oil pump 3 connected to the inlet of a connector 4; another inlet of the connector 4 connected to one end of an overflow pipe 43 equipped with an overflow valve 42, a ball valve 44, and a limit switch 45; the other end of the overflow pipe 43 connected to the overflow inlet 22 of the oil inlet 2; an outlet of the connector 4 connected to the inlet of a double-cylinder oil filter 5 equipped with a manual switching valve 51; and an outlet 6 of the double-cylinder oil filter 5 connected to the lifting hole 71 at the bottom of the bearing hot bearing shell 7 via a connecting pipe 61. So that the lubricating oil in the bearing oil chamber 1 is sent into the oil inlet 2 through the oil inlet 21, and then into the gear oil pump 3 driven by the motor 31 through the oil outlet 23 and the branch pipe 25 with the ball valve 26 and limit switch 24. After being pressurized during the rotation of the gear oil pump 3 driven by the motor 31, the overflow lubricating oil sent through the hose and overflow pipe 43 is sent through the one-way valve 41 into the double-cylinder oil filter 5 controlled by the manual switching valve 51 for filtration. After that, the pressurized lubricating oil is sent into the space between the bearing bush and the journal through the outlet 6, the connecting pipe 61, and the lifting hole 71 at the bottom of the bearing hot bearing bush 7. During the gap, the shaft is lifted by 0.03~0.05mm, an oil film is established, and the thickness and rigidity of the oil film are increased. Ultimately, while lubricating the bearing bush, the bearing bush temperature is reduced to avoid thermal deformation and ensure the safety of the bearing bush. At the same time, the flow (overflow and lubricating oil) into the double-cylinder oil filter 5 is controlled by the manual switching valve 51. With the operation of the overflow pipe 43, overflow valve 42, ball valve 44, and limit switch 45, the oil pressure of the lubricating oil sent to the bottom of the bearing bush can be adjusted to meet the needs of lifting the shaft by 0.03~0.05mm, establishing an oil film, and increasing the thickness and rigidity of the oil film.

[0014] The dual-cylinder oil filter 5 is mounted on the base plate 9 via a support frame 8, and a manual switching valve 51 is provided on the outside. The switching valve 51 allows only one of the oil filters in the dual-cylinder oil filter 5 to operate.

[0015] The oil inlet 2 has an oil inlet 21, two oil outlets 23, and two overflow inlets 22. The oil inlet 21 is connected to the bearing oil chamber 1 through a hose to draw lubricating oil from the bearing oil chamber 1. The two oil outlets 23 are respectively connected to the corresponding gear oil pump 3 driven by the motor 31 through the branch pipes 25 with ball valves 26 and limit switches 24, and then connected to the corresponding oil inlet of the connector 4, and then connected to the double-cylinder oil filter 5 controlled by the manual switching valve 51. The two overflow inlets 22 are respectively connected to the corresponding overflow pipes 43 with overflow valves 42, ball valves 44, and limit switches 45 to precisely adjust the system pressure.

[0016] The connector 4 is mounted on the support frame 8 and located above the double-cylinder oil filter 5. The outlet of the connector 4 is connected to the oil outlet pipe 53 with a pressure gauge 52 mounted on it through a branch pipe with a one-way valve 41 mounted on it. The oil outlet pipe 53 is connected to the double-cylinder oil filter 5 with a manual switching valve 51 mounted on it. The pressure gauge 52 is connected to the PLC control system through a wire to indicate the system oil pressure.

[0017] The ball valve 26 and limit switch 24 on the branch pipe 25, and the ball valve 44 and limit switch 45 on the overflow pipe 43 are respectively connected to the PLC control system through wires to indicate whether the branch pipe 25 and the overflow pipe 43 are open or closed.

[0018] The oil inlet 2, motor 31, and gear oil pump 3 are all mounted on the base plate.

[0019] The connector 4, overflow valve 42, and one-way valve 41 are all mounted on the support frame 8 on the base plate 9.

[0020] Equipment connection: Oil is drawn from the inlet 2 → pressurized by the gear oil pump 3 driven by the motor 31 → merged by the connector 4 → filtered by the double-cylinder oil filter 5 → the pressure is adjusted by the overflow valve 42 and the overflow pipe 43 → fed into the gap between the bearing bush and the journal through the lifting hole 71, lifting the rotating shaft by 0.03~0.05mm, establishing an oil film and increasing the thickness and rigidity of the oil film, completing the lubrication while reducing the temperature of the bearing bush, avoiding thermal deformation, and ensuring the safety of the bearing bush.

Claims

1. A horizontal water turbine generator bearing adjustable high efficiency lubrication device, comprising: The oil inlet is connected to the bearing lubrication chamber via a hose. The oil outlet of the oil inlet is connected to a gear oil pump driven by a motor via a branch pipe equipped with a ball valve and a limit switch. The gear oil pump is connected to the connector inlet. At the same time, the other inlet of the connector is connected to one end of the overflow pipe equipped with an overflow valve, a ball valve, and a limit switch. The other end of the overflow pipe is connected to the overflow inlet of the oil inlet. The connector outlet is connected to the inlet of the double-cylinder oil filter equipped with a manual switching valve. The outlet of the double-cylinder oil filter is connected to the lifting hole at the bottom of the bearing hot bearing shell via a connecting pipe.

2. The adjustable high efficient lubrication device for horizontal hydro-generator bearing according to claim 1, characterized in that The dual-cylinder oil filter is mounted on the base plate via a support frame, and a manual switching valve is provided on the outside. The connector is located on the support frame and above the dual-cylinder oil filter.

3. The adjustable high efficient lubrication device for horizontal hydro-generator bearing according to claim 1, characterized in that The oil inlet device has one oil inlet, two oil outlets, and two overflow inlets, wherein the oil inlet is connected to the bearing oil chamber via a hose. The two oil outlets are connected to the corresponding gear oil pumps driven by motors through branch pipes equipped with ball valves and limit switches, and then connected to the corresponding oil inlets of the connectors, and finally connected to the dual-cylinder oil filter controlled by a manual switching valve. The two oil overflow inlets are respectively connected to their corresponding overflow pipes equipped with overflow valves, ball valves, and limit switches.

4. The adjustable high efficient lubrication device for horizontal hydro-generator bearing according to claim 1, characterized in that The connector outlets are connected to the oil outlet pipes with pressure gauges on them via branch pipes equipped with one-way valves. The oil outlet pipes are connected to the double-cylinder oil filters with manual switching valves on them. The pressure gauges are connected to the PLC control system via wires.

5. The adjustable high-efficiency lubrication device for bearings of horizontal hydro-generators according to claim 1, characterized in that... The ball valve and limit switch on the branch pipe, and the ball valve and limit switch on the overflow pipe are respectively connected to the PLC control system via wires.

6. The adjustable high efficient lubrication device for horizontal hydro-generator bearing according to claim 1, characterized in that The oil inlet, motor, and gear oil pump are all mounted on the base plate.

7. The adjustable high efficient lubrication device for horizontal hydro-generator bearing according to claim 1, characterized in that The connector and overflow valve are both mounted on a support frame on the base plate.

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