Water guide external circulation system of on-line oil filtering water wheel generator set

Abstract

The utility model discloses a water guide external circulation system of an on-line oil filtering water turbine generator set, which is characterized in that an oil filtering pipeline is added on the basis of the water guide external circulation system of the existing water turbine generator set, and an on-line oil filtering system loop is formed by the oil filtering pipeline, an oil leakage pump of the water guide external circulation system and related pipelines. According to the on-line oil filtering system, a loop pipeline is short, the influence on the liquid level of the water guide outer oil tank and the normal operation of a unit is small, and on-line oil filtering without shutdown can be achieved on the premise that the normal function of a water guide outer circulation system is not influenced.

Description

Technical Field

[0001] The utility model belongs to the technical field of water-guided external circulation oil circuit design, in particular to a water-guided external circulation system for an online oil-filtering water turbine generator set. Background Art

[0002] In the existing large-scale mixed flow turbine generator set design, there is a problem that the oil quality of the water guide bearing deteriorates and does not meet the unit operation indicators. Figure 1 ,like Figure 1 The figure shows a schematic diagram of the water guide external circulation system of the existing hydro-turbine generator set. The water guide external oil tank collects the bearing leakage oil discharged from the water guide lower oil tank after the entire hydro-turbine generator set water guide external circulation, the bearing overflow return oil from the water guide upper oil tank and the oil tank refueling. When the water guide bearing oil quality deteriorates and does not meet the unit operation indicators, there are two oil quality treatment solutions in the existing technology:

[0003] Option 1: Install an oil filter at the oil drain line of the water-guide oil tank to filter the oil. However, this method has a significant impact on the oil level in the water-guide external oil tank and requires shutdown. The length of shutdown depends on the oil filtration situation.

[0004] Option 2: It is necessary to shut down the machine to drain all the lubricating oil from the water-guide bearing and clean the oil tank, and finally add lubricating oil that meets the requirements. This is not only labor-intensive and time-consuming, but also seriously affects the normal operation of the unit.

[0005] Therefore, it is necessary to design and research an online oil filtration system that can filter oil without affecting the normal operation of the hydro-turbine generator set, improve oil quality, and ensure the stable operation of large hydro-turbine generator sets. Summary of the invention

[0006] The purpose of the utility model is to overcome the defects of the prior art and provide an online oil filtering water guide external circulation system for a turbine generator set. The utility model is easy to use and can filter the oil online without affecting the operation or normal standby of the turbine generator set. The utility model can also timely improve the pollution level of the lubricating oil particles in the water guide oil tank of a large mixed flow turbine generator set through the online oil filtering system when the pollution level of the lubricating oil particles in the water guide oil tank is reduced.

[0007] The purpose of the utility model is achieved through the following technical solutions:

[0008] An online oil-filtering water-turbine generator set water-guiding external circulation system, the water-guiding external circulation system comprises a water-guiding external oil tank, an oil leakage pump, an oil leakage tank, an oil outlet pipeline and an oil discharge pipeline, the water-guiding external circulation system also comprises an online oil filtering system, the online oil filtering system comprises the oil outlet pipeline, the oil leakage pump, the oil discharge pipeline and the oil filtering pipeline;

[0009] The water-guided external oil tank is connected to the inlet of the leakage oil pump through the oil outlet pipeline, the outlet of the leakage oil pump is connected to the oil discharge pipeline, and the oil discharge pipeline is further connected to the water-guided external oil tank through the oil filter pipeline to form the online oil filter system.

[0010] Furthermore, the oil filter pipeline includes a filter, a first valve and a second valve, the first valve is arranged at the oil filter pipeline outlet near the water-conducting external oil tank, the second valve is arranged at the oil filter pipeline inlet near the oil drain pipeline, and the filter is arranged between the first valve and the second valve.

[0011] Furthermore, the oil leakage pump is a screw type oil leakage pump.

[0012] Furthermore, the oil filter pipeline is also provided with a monitoring device, which includes a pressure gauge and a flow meter.

[0013] Furthermore, the oil filter pipeline is assembled at a preset position in the top cover of the generator set by welding.

[0014] Furthermore, the filter has a precision of 5 μm.

[0015] Furthermore, the screw oil leakage pump has a head of 40m and a flow rate of 10m 3 / h.

[0016] The beneficial effects of the utility model are:

[0017] The utility model proposes to realize online oil filtering by means of a short oil filtering circulation pipeline, making full use of the existing structure of the water-conducting external circulation system of the existing hydro-turbine generator set, and under the premise of not affecting its normal function, the oil in the water-conducting external oil tank is extracted by the currently existing screw oil leakage pump, and the oil is returned to the water-conducting external oil tank after being filtered through the newly added filtering pipeline, without stopping the machine, thereby realizing online oil filtering. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the water conduction external circulation system of the existing hydro-generator set;

[0019] Figure 2 It is a schematic diagram of the water conduction external circulation system of the online oil filtering water turbine generator set according to the embodiment of the utility model.

[0020] Figure numerals: 1-water-guided outer oil tank, 2-leakage oil tank, 3-leakage oil pump, 4-oil depot refueling pipe, 5-bearing overflow return oil pipe, 6-first bearing leakage oil collection pipe, 7-second bearing leakage oil collection pipe, 8-water-guided circulating oil pump, 9-water-guided lower oil tank, 10-water-guided upper oil tank, 11-filter, 12-flow meter, 13-cooler, 14-pressure transmitter. DETAILED DESCRIPTION

[0021] The following describes the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0022] Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present utility model.

[0023] Existing oil treatment solutions for hydro-turbine generator sets all require shutdown, affecting the normal operation of the units.

[0024] Therefore, it is necessary to design and research an online oil filtration system that can filter oil without affecting the normal operation of the hydro-turbine generator set, improve oil quality, and ensure the stable operation of large hydro-turbine generator sets.

[0025] In order to solve the above technical problems, the following embodiments of the utility model are proposed, which are an online oil-filtering water-turbine generator set water guide external circulation system.

[0026] Example 1

[0027] This embodiment improves on the existing water-conducting external circulation system of a hydro-generator set, and utilizes part of the original structure of the equipment and a newly added oil filtering pipeline to achieve online oil filtering.

[0028] from Figure 1 It can be seen that the existing water-guided external circulation system consists of a water-guided external oil tank 1, an oil leakage tank 2, an oil leakage pump 3, an oil depot refueling pipe 4, a bearing overflow return oil pipe 5, a first bearing oil leakage collection pipe 6, a second bearing oil leakage collection pipe 7, a water-guided circulating oil pump 8, a water-guided lower oil tank 9, a water-guided upper oil tank 10, a filter 11, a flow meter 12, a cooler 13 and a pressure transmitter 14.

[0029] Reference Figure 2 ,like Figure 2 The figure shows a schematic diagram of the water-conducting external circulation system of the water turbine generator set with online oil filtering in this embodiment. The existing water-conducting external circulation system of the water turbine generator set includes a water-conducting external oil tank 1, an oil leakage pump 3, an oil leakage tank 2, an oil outlet pipeline and an oil discharge pipeline. In this embodiment, an online oil filtering system is newly added thereto. The online oil filtering system is composed of the original oil outlet pipeline, the oil leakage pump 3, the oil discharge pipeline and the newly added oil filtering pipeline of the water-conducting external circulation system of the water turbine generator set;

[0030] The water-guided external oil tank is connected to the inlet of the leakage oil pump 3 through the oil outlet pipeline, the outlet of the leakage oil pump 3 is connected to the oil discharge pipeline, and the oil discharge pipeline is connected to the water-guided external oil tank through the oil filter pipeline to form an online oil filter system.

[0031] As an implementation method, the oil filter pipeline of this embodiment is composed of a screw oil leakage pump, two valves, a filter and related pipelines. Specifically, the oil filter pipeline includes a filter, a first valve and a second valve. The first valve is arranged at the outlet of the oil filter pipeline near the water-conducting external oil tank, the second valve is arranged at the inlet of the oil filter pipeline near the oil discharge pipeline, the filter is arranged between the first valve and the second valve, and the inlet of the oil outlet pipeline and the outlet of the oil discharge pipeline are located on the same side of the water-conducting external oil tank.

[0032] In actual use, first install the two valves, one filter and related pipelines according to Figure 2 As shown, welding and assembly are performed at a suitable position inside the top cover of the hydro-generator set, and the assembly position can be pre-planned and designed according to the internal space of the hydro-generator set to avoid conflicts with other pipelines.

[0033] After checking that there is no abnormality in the pipeline, fully open the two valves, and then start the oil leakage pump 3 to perform online oil filtering. The oil in the water-guided external oil tank is pumped out by the oil leakage pump 3, and returns to the water-guided external oil tank after being filtered through the filter. Since the online oil filtration circulation pipeline is short, it has little impact on the liquid level of the water-guided external oil tank and the normal operation of the unit.

[0034] This embodiment makes full use of existing equipment without affecting its normal function. The oil in the water-conducting external oil tank is pumped out by the existing screw oil leakage pump 3, and the oil is returned to the water-conducting external oil tank after being filtered by the filter, thereby realizing online oil filtering.

[0035] As an implementation manner, in this embodiment, the accuracy of the filter is set to 5 μm.

[0036] As an implementation mode, in this embodiment, the head of the oil leakage pump 3 is set to H = 40m, and the flow rate of the oil leakage pump 3 is set to Q = 10m 3 / h.

[0037] As an implementation method, this embodiment can also add monitoring equipment such as a pressure gauge and a flow meter on the oil filter pipeline according to actual needs.

[0038] The present embodiment provides a novel online oil filtering system and method for the water guide external circulation system of a large-scale mixed flow hydraulic turbine generator set. The system is easy to use and can perform online oil filtering without affecting the operation or normal standby of the hydraulic turbine generator set. The system can also timely improve the contamination level of the lubricating oil particles in the water guide oil tank of the large-scale mixed flow hydraulic turbine generator set when the contamination level of the lubricating oil in the water guide oil tank decreases through the online oil filtering system, thereby avoiding damage to the water guide bearing or shutdown of the unit due to oil quality problems. The system is simple to use and easy to install, and has the advantages of strong promotion and ease of use.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0040] In the present invention, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.

Claims

1. An online oil-filtering water turbine generator set water-guiding external circulation system, the water-guiding external circulation system comprises a water-guiding external oil tank, an oil leakage pump, an oil leakage tank, an oil outlet pipeline and an oil discharge pipeline, characterized in that: The water-conducting external circulation system further comprises an online oil filtering system, and the online oil filtering system comprises the oil outlet pipeline, the oil leakage pump, the oil discharge pipeline and the oil filtering pipeline; The water-guided external oil tank is connected to the inlet of the leakage oil pump through the oil outlet pipeline, the outlet of the leakage oil pump is connected to the oil discharge pipeline, and the oil discharge pipeline is further connected to the water-guided external oil tank through the oil filter pipeline to form the online oil filter system; The inlet of the oil outlet pipeline and the outlet of the oil discharge pipeline are located on the same side of the water-guided external oil tank.

2. The water conduction external circulation system of the online oil filter turbine generator set according to claim 1 is characterized in that: The oil filter pipeline includes a filter, a first valve and a second valve. The first valve is arranged at the oil filter pipeline outlet close to the water-conducting external oil tank, the second valve is arranged at the oil filter pipeline inlet close to the oil drain pipeline, and the filter is arranged between the first valve and the second valve.

3. The water conduction external circulation system of the online oil filter water turbine generator set according to claim 1 is characterized in that: The oil leakage pump is a screw type oil leakage pump.

4. The water conduction external circulation system of the online oil filter water turbine generator set according to claim 1 is characterized in that: The oil filter pipeline is also provided with a monitoring device, which includes a pressure gauge and a flow meter.

5. The water conduction external circulation system of the online oil-filtering water turbine generator set according to claim 1 is characterized in that: The oil filter pipeline is assembled at a preset position in the top cover of the generator set by welding.

6. The water conduction external circulation system of the online oil-filtering water turbine generator set according to claim 2 is characterized in that: The filter has a precision of 5 μm.

7. The water conduction external circulation system of the online oil-filtering turbine generator set as claimed in claim 3 is characterized in that: The screw oil leakage pump has a head of 40m and a flow rate of 10m3 / h.

Images