Jacking shaft oil pump control system for compressed air energy storage process

Abstract

The utility model belongs to the field of oil pump control, and particularly relates to a jacking oil pump control system for a compressed air energy storage process. The system comprises an inlet filter, a main oil pump unit, a standby oil pump unit and an output measuring unit, the input end of the inlet filter is connected with an external oil storage unit, and the output end is respectively connected with the input ends of the main oil pump unit and the standby oil pump unit; the output ends of the main oil pump unit and the standby oil pump unit are respectively connected with the input end of the output measuring unit; and a plurality of output ends of the output measuring unit are respectively connected with a plurality of external oil consumption devices. By means of the main oil pump unit and the standby oil pump unit, the on-line switching scheme that one oil pump is used and the other oil pump is standby is achieved, and stability of oil supply pressure of the high-pressure jacking oil pump is improved.

Description

Technical Field

[0001] The utility model relates to an oil pump control system, in particular to a top shaft oil pump control system of a compressed air energy storage process. Background Art

[0002] In the compressed air energy storage unit, the main function of the top shaft oil pump system is to supply oil to the compressor, gearbox and motor.

[0003] In existing units, the compressor, gearbox and motor are usually equipped with separate top shaft oil pump systems, which are controlled independently, resulting in a relatively complex top shaft oil pump system for the entire unit and no space conditions for setting up a backup system. Therefore, when the top shaft oil pump system fails during the operation of the unit, the entire unit needs to be shut down for maintenance, causing huge economic losses. Utility Model Content

[0004] The purpose of the utility model is to solve the technical problem that in the existing compressed air energy storage unit, the compressor, the gear box and the motor are respectively equipped with separate top shaft oil pump systems, which makes the top shaft oil pump system of the whole unit more complicated and there is no space condition to set up a backup system. Therefore, when the top shaft oil pump system fails during the operation of the unit, the whole unit needs to be shut down for maintenance, and a compressed air energy storage process top shaft oil pump control system is provided.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A compressed air energy storage process top shaft oil pump control system, which is special in that:

[0007] It includes an inlet filter, a main oil pump unit, a backup oil pump unit and an output measurement unit;

[0008] The input end of the inlet filter is connected to the external oil storage unit, and the output end is connected to the input ends of the main oil pump unit and the backup oil pump unit respectively;

[0009] The output ends of the main oil pump unit and the backup oil pump unit are respectively connected to the input ends of the output measurement unit;

[0010] The plurality of output terminals of the output measuring unit are respectively connected to a plurality of external oil-consuming devices.

[0011] Furthermore, the main oil pump unit and the backup oil pump unit have the same structure, and both include a high-pressure top shaft oil pump, a flow distribution valve and a one-way valve connected in sequence; the input ends of the high-pressure top shaft oil pumps in the main oil pump unit and the backup oil pump unit are respectively connected to the output ends of the inlet filters; the output ends of the one-way valves in the main oil pump unit and the backup oil pump unit are respectively connected to the input ends of the output measuring units.

[0012] Furthermore, the number of flow distribution valves and one-way valves in the main oil pump unit and the backup oil pump unit is N; N≥2; the N flow distribution valves and the N one-way valves are connected one-to-one, and the input ends of the N flow distribution valves are respectively connected to the output ends of the high-pressure top shaft oil pump; the output ends of the N one-way valves are respectively connected to the input end of the output measuring unit; the output measuring unit includes N flow measuring instruments and N pressure measuring instruments; the input ends of the N flow measuring instruments are respectively connected to the output ends of the N one-way valves in the main oil pump unit and the backup oil pump unit; the number of external oil-consuming devices is N, and the output ends of the N flow measuring instruments are respectively connected to the N external oil-consuming devices; the N pressure measuring instruments are respectively arranged at the output ends of the N flow measuring instruments.

[0013] Furthermore, N=3.

[0014] Furthermore, the main oil pump unit and the backup oil pump unit also include a pressure relief safety valve; the input end of the pressure relief safety valve is connected to the output end of the high-pressure top shaft oil pump, and the output end is connected to the external oil return port.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. The utility model realizes an online switching scheme of one in use and one in backup by setting up a main oil pump unit and a backup oil pump unit, thereby improving the stability of the oil supply pressure of the high-pressure top shaft oil pump.

[0017] 2. The utility model realizes the purpose of converting the high-pressure jacking oil pump from one supplying one to one supplying multiple by arranging a flow distribution valve and a one-way valve at the output end of each high-pressure jacking oil pump, and can supply oil of required pressure and flow to different equipment at the same time.

[0018] 3. The utility model provides a separate safety pressure relief valve for each high-pressure jacking oil pump, so that the main oil pump unit and the backup oil pump unit can operate at the same time.

[0019] 4. The utility model can measure the oil flow and pressure in the system in real time by means of the flow measuring instrument and pressure measuring instrument, so as to grasp the oil supply situation in the system in real time. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of an embodiment of the utility model.

[0021] In the figure, 1-inlet filter, 2-high-pressure top shaft oil pump, 3-flow distribution valve, 4-check valve, 5-flow measuring instrument, 6-pressure measuring instrument, 7-pressure relief safety valve. DETAILED DESCRIPTION

[0022] In order to make the purpose, advantages and features of the utility model clearer, the following is a further detailed description of a compressed air energy storage process top shaft oil pump control system proposed by the utility model in combination with the accompanying drawings and specific embodiments. According to the following specific implementation methods, the advantages and features of the utility model will be clearer.

[0023] See also Figure 1 In this embodiment, a compressed air energy storage process top shaft oil pump control system specifically includes an inlet filter 1, a main oil pump unit, a backup oil pump unit and an output measurement unit.

[0024] Among them, the input end of the inlet filter 1 serves as the oil suction port of the entire system, is connected to the external oil storage unit, is used to input the oil required by the system, and filters the inhaled oil to prevent solid particles mixed in the oil from having a negative impact on other structures in the system.

[0025] In the specific setting, a bypass can be set on the inlet filter 1, that is, an automatically openable one-way valve 4 is set in parallel at both ends of the inlet filter 1. The one-way valve 4 is closed when the inlet filter 1 is working normally, and can be automatically opened when the inlet filter 1 is blocked to ensure the continuity of oil supply.

[0026] The main oil pump unit and the backup oil pump unit of this embodiment are configured in parallel, and the two can be used one for use and the other for backup, or can work simultaneously. The input ends of the main oil pump unit and the backup oil pump unit are respectively connected to the output end of the inlet filter 1, and the output ends of the main oil pump unit and the backup oil pump unit are respectively connected to the input end of the output measurement unit.

[0027] Specifically, the main oil pump unit and the backup oil pump unit in this embodiment have the same structure, and both include a high-pressure top shaft oil pump 2, a flow distribution valve 3 and a one-way valve 4 connected in sequence.

[0028] Among them, the main function of the flow distribution valve 3 is to distribute the flow of each oil-consuming equipment; the setting of the one-way valve 4 facilitates the online switching of the oil pump; the high-pressure top shaft oil pump 2 is specifically a plunger pump, or a gear pump.

[0029] The input ends of the high-pressure top shaft oil pump 2 in the main oil pump unit and the backup oil pump unit are respectively connected to the output end of the inlet filter 1; the output end of the one-way valve 4 is connected to the input end of the output measurement unit.

[0030] The number of flow distribution valves 3 and one-way valves 4 in the structure of the main oil pump unit and the standby oil pump unit is N; N≥2; it can be specifically set according to the number of oil-consuming equipment, and several oil-consuming equipment means several flow distribution valves 3. In this embodiment, N=3 is used as an example: three flow distribution valves 3 and three one-way valves 4 are connected one by one, and the input ends of the three flow distribution valves 3 are respectively connected to the output ends of the high-pressure top shaft oil pump 2; the output ends of the three one-way valves 4 are respectively connected to the input ends of the output measurement unit.

[0031] In a preferred embodiment of the present invention, the main oil pump unit and the backup oil pump unit further include a pressure relief safety valve 7; the main function of the pressure relief safety valve 7 is to limit the oil pump outlet pressure to avoid system overpressure. The input end of the pressure relief safety valve 7 is connected to the output end of the high-pressure top shaft oil pump 2, and the output end is connected to the external oil return port.

[0032] The output end of the output measurement unit is connected to an external oil-consuming device. Specifically, the output measurement unit includes a flow measurement instrument 5 and a pressure measurement instrument 6 connected in sequence; the output end of the flow measurement instrument 5 serves as a high-pressure oil outlet of the system and is connected to an external oil-consuming device. It should be noted that in this embodiment, the output measurement unit is specifically configured as a combination of the flow measurement instrument 5 and the pressure measurement instrument 6, which is only required for the specific implementation of the utility model. Those skilled in the art can design other measuring instruments according to specific needs during the specific implementation.

[0033] The aforementioned N=3, therefore, in this embodiment, the number of flow measuring instruments 5 and the number of pressure measuring instruments 6 are both 3; the input ends of the three flow measuring instruments 5 are respectively connected to the output ends of the three one-way valves 4 in the main oil pump unit and the standby oil pump unit; the number of external oil-consuming devices is 3, namely, a compressor, a gear box and a motor; the three flow measuring instruments 5 are respectively connected to the oil inlets of the compressor, the gear box and the motor, and the three pressure measuring instruments 6 are respectively arranged at the output ends of the three flow measuring instruments 5.

[0034] When in use, the output oil pressure is measured in real time by the pressure measuring instrument 6. When the measured oil supply pressure is lower than the alarm value, the standby oil pump unit is started. The alarm value can be set specifically according to the needs of each device. The alarm setting value in this embodiment is 6-10MPa(G);

[0035] When the measured oil supply pressure is lower than the shutdown value, the interlocking compressor unit will stop and the jacking oil pump will display a fault state. The shutdown setting value in this embodiment is 3-5MPa(G).

Claims

1. A compressed air energy storage process top shaft oil pump control system, characterized in that: It includes an inlet filter (1), a main oil pump unit, a backup oil pump unit and an output measurement unit; The input end of the inlet filter (1) is connected to an external oil storage unit, and the output end is connected to the input ends of the main oil pump unit and the backup oil pump unit respectively; The output ends of the main oil pump unit and the backup oil pump unit are respectively connected to the input end of the output measurement unit; The multiple output ends of the output measurement unit are respectively connected to multiple external oil-consuming devices; The main oil pump unit and the backup oil pump unit have the same structure, and both comprise a high-pressure top shaft oil pump (2), a flow distribution valve (3) and a one-way valve (4) which are connected in sequence; The input ends of the high-pressure top shaft oil pumps (2) in the main oil pump unit and the backup oil pump unit are respectively connected to the output ends of the inlet filter (1); The output ends of the one-way valves (4) in the main oil pump unit and the backup oil pump unit are respectively connected to the input ends of the output measurement units; The main oil pump unit and the backup oil pump unit further include a pressure relief safety valve (7); The input end of the pressure relief safety valve (7) is connected to the output end of the high-pressure jacking oil pump (2), and the output end is connected to an external oil return port.

2. The compressed air energy storage process top shaft oil pump control system according to claim 1 is characterized in that: The number of flow distribution valves (3) and one-way valves (4) in the main oil pump unit and the backup oil pump unit are both N; N≥2; The N flow distribution valves (3) and the N one-way valves (4) are connected in a one-to-one correspondence, the input ends of the N flow distribution valves (3) are respectively connected to the output ends of the high-pressure top shaft oil pump (2); the output ends of the N one-way valves (4) are respectively connected to the input ends of the output measurement units; The output measurement unit comprises N flow measurement instruments (5) and N pressure measurement instruments (6); The input ends of the N flow measurement instruments (5) are respectively connected to the output ends of the N one-way valves (4) in the main oil pump unit and the backup oil pump unit; The number of external oil-consuming devices is N, and the output ends of the N flow measurement instruments (5) are respectively connected to the N external oil-consuming devices; The N pressure measuring instruments (6) are respectively arranged at the output ends of the N flow measuring instruments (5).

3. The compressed air energy storage process top shaft oil pump control system according to claim 2 is characterized in that: N＝3。

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