Hydraulic oil plunger pump high-pressure energy storage circulating generator set

Abstract

The utility model discloses a generator set, and particularly relates to a hydraulic oil plunger pump high-pressure energy storage circulating generator set, which comprises a plunger oil pressure pump, a high-pressure storage tank, a high-pressure energy storage pump, a high-pressure energy storage pump, a high-pressure energy storage pump, a high-pressure energy storage pump and a high-pressure energy storage pump, and is characterized in that the plunger oil pressure pump is used for pressurizing hydraulic oil in an oil storage tank; the high-pressure storage tank is used for storing the hydraulic oil pressurized by the plunger oil pressure pump; the hydraulic motor is used for receiving the high-pressure hydraulic oil from the high-pressure storage tank and driving a power generator to generate power; hydraulic oil in the high-pressure storage tank is treated by the hydraulic motor to become low-pressure hydraulic oil, and the low-pressure hydraulic oil is discharged into the oil return tank; and the hydraulic oil in the oil return tank passes through a filter and a cooler and then returns to the oil storage tank. According to the technical scheme provided by the utility model, the passivity of the flywheel energy storage system is realized, the energy storage process can be completed without an external power supply, the energy consumption of the energy storage system is reduced, and the reliability and the stability of the energy storage system are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of electric power equipment, especially relates to a hydraulic oil plunger pump high pressure energy storage circulating generator set. BACKGROUND

[0002] With the development of economy and the progress of society, the demand for energy is increasing, while the traditional energy is gradually decreasing and faces the problem of environmental pollution, so it is urgent to develop new energy. The mainstream energy storage method on the market is lithium battery energy storage, but lithium battery has the disadvantages of low energy density, short service life and poor safety, while flywheel energy storage is a high-efficiency, long-life and environmentally friendly mechanical energy storage device, which has the advantages of fast response speed, high power density, deep discharge and environmental friendliness, and has a broad application prospect in power grid frequency modulation, uninterruptible power supply, wind power generation and rail transit.

[0003] The existing flywheel energy storage system adopts magnetic suspension bearing to support the high-speed rotating flywheel disc, and uses the kinetic energy of the flywheel disc for energy storage. When energy needs to be released, the flywheel disc is driven in reverse rotation by the motor to output electric energy. However, since the flywheel disc itself has a large mass, a large starting current is required to accelerate the flywheel disc to the rated speed. If such a large current is directly taken from the power grid, it will seriously affect the safe operation of the power grid, and also cause the reliability of the flywheel system to decrease. In order to reduce the starting current of the flywheel system, the existing technology usually adopts the method of starting by reducing the voltage of the frequency converter, that is, the frequency converter is used to power the motor and control the motor to operate according to a certain rule, so that the flywheel disc slowly accelerates to the rated speed and then connects to the power grid. Although this method can effectively reduce the starting current of the flywheel system, the frequency converter itself has large loss, which causes energy waste, and the frequency converter is bulky and expensive, which undoubtedly increases the cost of the flywheel system.

[0004] In view of the problems existing in the above-mentioned related technology, it is necessary to provide a technical scheme capable of solving the problem of large energy consumption in the related technology. INVENTION CONTENTS

[0005] The utility model discloses in order to solve the above-mentioned prior art problems, provide a kind of hydraulic oil plunger pump high pressure energy storage circulating generator set, to solve the technical problem of present.

[0006] The technical scheme adopted by the utility model to solve its technical problems is:

[0007] The utility model provides a kind of hydraulic oil plunger pump high pressure energy storage circulating generator set, comprising:

[0008] Plunger oil pressure pump, the plunger oil pressure pump is used to pressurize the hydraulic oil in the storage oil tank and deliver to high pressure storage tank;

[0009] a high-pressure tank for storing hydraulic oil pressurized by the plunger oil hydraulic pump;

[0010] a hydraulic motor for receiving high-pressure hydraulic oil from the high-pressure tank and driving a generator to generate electricity; the hydraulic oil in the high-pressure tank becomes low-pressure hydraulic oil after being processed by the hydraulic motor, and the low-pressure hydraulic oil is discharged into a return tank;

[0011] a return tank, in which the hydraulic oil is filtered and cooled before returning to the storage tank.

[0012] Preferably, it further comprises:

[0013] a first pipeline connected between the storage tank and the plunger oil hydraulic pump;

[0014] a second pipeline connected between the plunger oil hydraulic pump and the high-pressure tank;

[0015] a third pipeline connected between the high-pressure tank and the hydraulic motor;

[0016] a fourth pipeline connected between the hydraulic motor and the return tank;

[0017] a fifth pipeline connected between the return tank, the filter, and the storage tank.

[0018] Preferably, it further comprises a temperature sensor, a pressure sensor, and a liquid level gauge, wherein the temperature sensor detects the temperature inside the high-pressure tank and the return tank, the pressure sensor detects the pressure inside the high-pressure tank and the return tank, and the liquid level gauge detects the liquid level inside the storage tank.

[0019] Preferably, the pressure of the plunger oil hydraulic pump is 31.5 MPa.

[0020] Preferably, the pressure of the high-pressure tank is 20 MPa, and the pressure of the hydraulic oil in the return tank is less than 4 MPa.

[0021] Preferably, the working pressure range of the hydraulic motor is 1.9 MPa-3.9 MPa, and the rotational speed range is 1500 r / min-3000 r / min.

[0022] Preferably, the power range of the generator is 1100 kW-2700 kW, the voltage range is 380 V-450 V, and the frequency range is 50 Hz-60 Hz.

[0023] The utility model discloses beneficial effect is: in the utility model provides technical scheme, first by plunger oil pressure pump pressurizes the hydraulic oil in storage oil tank and then is delivered to high pressure storage tank, then by hydraulic motor receives high pressure hydraulic oil from high pressure storage tank, and drive generator generates electricity, finally the hydraulic oil in high pressure storage tank becomes low pressure hydraulic oil after being handled by hydraulic motor, and then low pressure hydraulic oil is discharged into the oil return tank, and the circulation use of hydraulic oil is realized, from this, it can be seen that the utility model provides technical scheme, realizes the passive of flywheel energy storage system, and can complete the energy storage process without external power supply, reduces the energy consumption of energy storage system, improves the reliability and stability of energy storage system. BRIEF DESCRIPTION OF DRAWINGS

[0024] The above aspects and advantages of the utility model will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, in which:

[0025] Fig. 1 It is the schematic diagram of hydraulic oil plunger pump high pressure energy storage circulating generator set of the utility model embodiment;

[0026] Fig. 2 It is the structural schematic diagram of hydraulic oil plunger pump high pressure energy storage circulating generator set of the utility model embodiment.

[0027] BRIEF DESCRIPTION OF DRAWINGS

[0028] In Figs. 1-2 , storage oil tank 1;Plunger oil pressure pump 2;High pressure storage tank 3;Hydraulic motor 4;Generator 5;Oil return tank 6;Filter 7;Cooler 8;First pipe line 9;Second pipe line 10;Third pipe line 11;Fourth pipe line 12;Fifth pipe line 13;Temperature sensor 14;Pressure sensor 15;Liquid level meter 16;Controller 17. DETAILED DESCRIPTION

[0029] The technical scheme of the utility model will be described clearly and completely below by combining with the actual research case of our company technical personnel, obviously, the described embodiment is only a part of the embodiment of the utility model, not all the embodiment. Based on the embodiment in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor are within the protection scope of the utility model.

[0030] It should be understood that when used in the description and the appended claims, the terms "include" and "contain" indicate the existence of the described features, whole, steps, operations, elements and / or components, but do not exclude the existence or addition of one or more other features, whole, steps, operations, elements, components and / or sets thereof.

[0031] It should also be understood that the terms used in the specification of the utility model herein are only for the purpose of describing specific embodiments and are not intended to limit the utility model. As used in the specification of the utility model and the appended claims, the singular forms "a", "an" and "the" are intended to include the plural forms unless the context clearly indicates otherwise.

[0032] It should be further understood that the term "and / or" used in the specification of the utility model and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes these combinations.

[0033] As shown in Fig. 1 and Fig. 2 An embodiment of the utility model provides a hydraulic oil plunger pump high-pressure energy storage circulating generator set, which comprises:

[0034] A storage tank 1;

[0035] A plunger oil pressure pump 2 for pressurizing and delivering hydraulic oil in the storage tank 1 into a high-pressure storage tank 3;

[0036] A high-pressure storage tank 3 for storing hydraulic oil pressurized by the plunger oil pressure pump 2;

[0037] A hydraulic motor 4 for receiving high-pressure hydraulic oil from the high-pressure storage tank 3 and driving a generator 5 to generate electricity;

[0038] The hydraulic oil in the high-pressure storage tank 3 becomes medium-pressure hydraulic oil after being processed by the hydraulic motor 4, and the medium-pressure hydraulic oil is discharged into a return tank 6;

[0039] The return tank 6, the hydraulic oil in the return tank 6 returns to the storage tank 1 after being filtered by a filter 7 and cooled by a cooler 8.

[0040] Specifically, in the technical scheme provided by the utility model, first, the plunger oil pressure pump 2 pressurizes and delivers hydraulic oil in the storage tank 1 into the high-pressure storage tank 3, then the hydraulic motor 4 receives high-pressure hydraulic oil from the high-pressure storage tank 3 and drives the generator 5 to generate electricity, and finally the hydraulic oil in the high-pressure storage tank 3 is processed by the hydraulic motor 4 to become medium-pressure hydraulic oil, and the medium-pressure hydraulic oil is discharged into the return tank 6, thereby realizing the recycling of hydraulic oil. As can be seen, the technical scheme provided by the utility model realizes the passivity of the flywheel energy storage system, completes the energy storage process without external power supply, reduces the energy consumption of the energy storage system, and improves the reliability and stability of the energy storage system.

[0041] In an embodiment, it further comprises:

[0042] A first pipeline 9 is used to connect the storage tank 1 and the plunger oil hydraulic pump 2.

[0043] A second pipeline 10 is used to connect the plunger oil hydraulic pump 2 and the high-pressure storage tank 3.

[0044] A third pipeline 11 is used to connect the high-pressure storage tank 3 and the hydraulic motor 4.

[0045] A fourth pipeline 12 is used to connect the hydraulic motor 4 and the oil return tank 6.

[0046] A fifth pipeline 13 is used to connect the oil return tank 6, the filter 7 and the storage tank 1.

[0047] In an embodiment, the pressure of the plunger oil hydraulic pump 2 is 31.5 MPa.

[0048] In an embodiment, the pressure of the high-pressure storage tank 3 is 20 MPa.

[0049] In an embodiment, the working pressure range of the hydraulic motor 4 is 1.9-3.9 MPa, and the rotating speed range is 1500-3000 r / min.

[0050] In an embodiment, the power range of the generator 5 is 1100-2700 kW, the voltage range is 380-450 V, and the frequency range is 50-60 Hz.

[0051] In an embodiment, the pressure of the hydraulic oil in the oil return tank 6 is less than 4 MPa.

[0052] In an embodiment, the unit is further provided with a temperature sensor 14, a pressure sensor 15 and a liquid level meter 16, wherein the temperature sensor 14 is used to detect the temperature inside the high-pressure storage tank 3 and the oil return tank 6, the pressure sensor 15 is used to detect the pressure inside the high-pressure storage tank 3 and the oil return tank 6, and the liquid level meter 16 is used to detect the liquid level height inside the storage tank 1.

[0053] In an embodiment, the unit is further provided with a controller 17, which communicates with the temperature sensor 14, the pressure sensor 15 and the liquid level meter 16 respectively to obtain the data information collected by the temperature sensor 14, the pressure sensor 15 and the liquid level meter 16.

[0054] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and is not intended to limit the present application, although the foregoing embodiments of the present application has been described in detail, for the skilled in the art, it still can be modified, or for part of the technical features of the equivalent replacement, the spirit and principles of the present application, made any modification, equivalent replacement, improvement, etc., should be included within the scope of the present application.

Claims

1. A hydraulic oil plunger pump high pressure energy storage cycle generator set, characterized in that: Comprise: A plunger oil pressure pump for pressurizing hydraulic oil in a storage tank and delivering it to a high-pressure tank; A high-pressure tank for storing hydraulic oil pressurized by the plunger oil pressure pump; A hydraulic motor for receiving high-pressure hydraulic oil from the high-pressure tank, driving a generator to generate electricity, and discharging it into a return tank; A return tank in which hydraulic oil is returned to the storage tank after being filtered and cooled.

2. The hydraulic oil column plunger pump high pressure energy storage cycle generator set of claim 1, wherein: Also comprise: A first pipeline connected between the storage tank and the plunger oil pressure pump; A second pipeline connected between the plunger oil pressure pump and the high-pressure tank; A third pipeline connected between the high-pressure tank and the hydraulic motor; A fourth pipeline connected between the hydraulic motor and the return tank; A fifth pipeline connected between the return tank and the storage tank.

3. The hydraulic oil column plunger pump high pressure energy storage cycle generator set of claim 1, wherein: Also comprise a temperature sensor, a pressure sensor, and a liquid level gauge, the temperature sensor detects the temperature inside the high-pressure tank and the return tank, the pressure sensor detects the pressure inside the high-pressure tank and the return tank, and the liquid level gauge detects the liquid level inside the storage tank.

4. The hydraulic oil column plunger pump high pressure energy storage cycle generator set of claim 1, wherein: The pressure of the plunger oil pressure pump is 31.5 MPa.

5. The hydraulic oil column plunger pump high pressure energy storage cycle generator set of claim 1, wherein: The pressure of the high-pressure tank is 20 MPa, and the pressure of the hydraulic oil in the return tank is less than 4 MPa.

6. The hydraulic oil column plunger pump high pressure energy storage cycle generator set of claim 1, wherein: The working pressure range of the hydraulic motor is 1.9-3.9 MPa, and the rotational speed range is 1500-3000 r / min.

7. The hydraulic oil column plunger pump high pressure energy storage cycle generator set of claim 1, wherein: The power range of the generator is 1100-2700 kW, the voltage range is 380-450 V, and the frequency range is 50-60 Hz.

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