A hydrogen liquid drive compressor booster pump

Abstract

The present invention discloses a hydrogen liquid-driven compressor booster pump, which relates to the technical field of boosting equipment. The pump comprises a base, on which a hydrogen compression cylinder, a hydraulic system, a balancing gas tank and a hydraulic oil recovery tank are arranged; the hydrogen compression cylinder consists of a cylinder I, a hydraulic cylinder and a cylinder II; a gas path channel I is opened on a block I, a gas path channel II is opened on a block II, and a balancing gas tank is arranged between gas path channel I and gas path channel II; a hydraulic oil recovery port I is opened on a block I, a hydraulic oil recovery port II is opened on a block II, and a hydraulic oil recovery tank is connected between the hydraulic oil recovery port I and the hydraulic oil recovery port II. On the one hand, the present invention separates oil and gas between the hydraulic cylinder and the cylinder through a seal on the block and an oil scraper, so as to ensure that the compressed gas is not contaminated by the hydraulic oil and the purity of the gas is guaranteed. In addition, the present invention is also equipped with a balancing gas tank and a hydraulic oil recovery tank. The balancing gas tank can prevent the hydrogen compression cylinder from being in a vacuum state, and the hydraulic oil recovery tank is convenient for recovering the hydraulic oil on the piston rod.

Description

Technical Field

[0001] The present invention belongs to the technical field of boosting equipment, and more specifically, relates to a hydrogen liquid-driven compressor booster pump. Background Art

[0002] Hydrogen energy, the chemical energy released by the chemical reaction of hydrogen and oxygen, is a clean secondary energy source with advantages such as high energy density, high calorific value, wide availability, storability, renewable energy, both electrical and combustible, zero pollution, and zero carbon emissions. It can help address energy crises and environmental issues and is hailed as the "ultimate energy source" of the 21st century. Key products for new energy vehicle development include fuel cell vehicles, with a clear focus on mass adoption in urban private and public service vehicles to promote the widespread application of fuel cell technology. Fuel cell technology is not new; its basic principles were discovered by scientists in the late 19th century, and its application in vehicles began in the late 1960s. At the time, the performance and manufacturing costs of fuel cell vehicles could not match those of gasoline-powered vehicles. However, with continuous improvements in fuel cell technology and continued investment by automakers in fuel cell vehicle research and development, fuel cell vehicles have experienced rapid development.

[0003] Hydrogen refueling stations are specialized facilities for refilling hydrogen fuel tanks for hydrogen fuel cell vehicles, hydrogen internal combustion engine vehicles, and hydrogen-natural gas hybrid vehicles. The hydrogen compressor is a core piece of equipment at these stations. To ensure hydrogen purity and compression ratio, the hydrogen compressors currently used in domestic hydrogen refueling stations are all metal diaphragm compressors. Metal diaphragm compressors are mechanical piston compressors that compress and transport hydrogen by reciprocating a metal diaphragm in a cylinder through a piston pushing hydraulic oil. However, these compressors are complex in structure, resulting in a short diaphragm lifespan, and the domed surface of the cover plate is a special profile that makes machining difficult and expensive. Summary of the Invention

[0004] The embodiment of the present application solves the problems existing in the prior art by providing a hydrogen liquid-driven compressor booster pump. On the one hand, it can ensure that the compressed gas is not contaminated by hydraulic oil and the purity of the gas is guaranteed. In addition, the present invention is also equipped with a balancing gas tank and a hydraulic oil recovery tank. The balancing gas tank can prevent the occurrence of a negative pressure vacuum state during the operation of the hydrogen compression cylinder, and the hydraulic oil recovery tank facilitates the recovery of the hydraulic oil on the piston rod.

[0005] In order to achieve the above objectives, the present invention adopts the following technical solutions:

[0006] A hydrogen liquid-driven compressor booster pump includes a base on which a hydrogen compression cylinder, a hydraulic system, a balance gas tank, and a hydraulic oil recovery tank are arranged; the hydraulic system drives a piston in the hydrogen compression cylinder to move back and forth to compress the hydrogen in the cylinder;

[0007] The hydrogen compression cylinder is composed of a coaxial cylinder I, a hydraulic cylinder, and a cylinder II; cylinder I and cylinder II are located on both sides of the hydraulic cylinder, and the two ends of the hydraulic cylinder are connected to cylinder I and cylinder II respectively through block I and block II;

[0008] A piston is provided in the cylinder I, which divides the cylinder I into a compression chamber I and a buffer chamber I, and the buffer chamber I is adjacent to the stopper I; a piston is also provided in the cylinder II; a piston is also provided in the cylinder II, which divides the cylinder II into a buffer chamber II and a compression chamber II, and the buffer chamber II is adjacent to the stopper II;

[0009] The piston in cylinder I, the piston in the hydraulic cylinder, and the piston in cylinder II are connected together by a piston rod that passes through cylinder I, block I, hydraulic cylinder, block II, and cylinder II, forming a whole and performing linkage. The hydraulic system drives the piston in the hydraulic cylinder to reciprocate, and the piston in the hydraulic cylinder drives the piston in cylinder I and the piston in cylinder II to reciprocate through the piston rod, and hydrogen is compressed and output through cylinder I and cylinder II.

[0010] The block I is provided with an air path channel I connected to the buffer chamber I, the block II is provided with an air path channel II connected to the buffer chamber II, and the balancing gas tank is arranged between the air path channel I and the air path channel II; the block I is provided with a hydraulic oil recovery port I at a position where the piston rod is in contact with the block, and the block II is provided with a hydraulic oil recovery port II at a position where the piston rod is in contact with the block, and a hydraulic oil recovery tank is connected between the hydraulic oil recovery port I and the hydraulic oil recovery port II.

[0011] In order to further optimize the present invention, the following technical solutions may be preferably used:

[0012] Preferably, the cylinder I and cylinder II are both composed of a cylinder head, a cylinder liner, a cylinder seat, a piston built into the cylinder body and a spiral cooling water jacket sleeved outside the cylinder liner, and cylinder I and cylinder II are a closed cylinder body; an air inlet and an air outlet are provided on the cylinder head, and a cylinder seat one-way valve is provided at the air inlet and the air outlet; the spiral cooling water jacket is provided outside the cylinder liner, and the spiral cooling water jacket is provided with a water inlet and a water outlet, and cooling water flows in the spiral cooling water jacket; the piston built into the cylinder body is connected to the piston rod by bolts.

[0013] Preferably, the balancing gas tank is provided with an exhaust port, and the external interface positions of the gas channel I and the gas channel II are provided with a one-way valve.

[0014] Preferably, both the block I and the block I are provided with a hydraulic system oil port communicating with the inner chamber of the hydraulic cylinder, and the hydraulic system oil port is connected to the hydraulic system through a pipeline.

[0015] Preferably, the cylinders I and II have the same inner diameter and are symmetrically arranged.

[0016] Preferably, the block I and block II are coaxially provided with a piston rod sealing ring, a dust ring and a support ring in the direction toward cylinder I and cylinder II, respectively. There are multiple piston rod sealing rings on the block I symmetrically arranged along the hydraulic oil recovery port I, and there are multiple piston rod sealing rings on the block II symmetrically arranged along the hydraulic oil recovery port II.

[0017] Preferably, the piston rod is composed of two piston rod units connected end to end, the two piston rod units are connected through the piston in the hydraulic cylinder, and the outer ends of the piston rod units are respectively connected to the piston in cylinder I and the piston in cylinder II.

[0018] Preferably, both ends of the block I are respectively provided with bosses I that cooperate with the cylinder body of cylinder I and the inner wall of the cylinder body of the hydraulic cylinder, and both ends of the block II are respectively provided with bosses II that cooperate with the cylinder body of cylinder II and the inner wall of the cylinder body of the hydraulic cylinder. Seals are provided at the two contact surface positions of the block I and the cylinder I, and seals are provided at the two contact surface positions of the block II and the cylinder II.

[0019] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0020] 1. In the present invention, the hydrogen working area and the hydraulic drive area are isolated from each other by a hydrogen compression cylinder composed of coaxial cylinder I, hydraulic cylinder, and cylinder II, thereby ensuring that the compressed gas is not contaminated by hydraulic oil and the purity of the gas is guaranteed; cylinder I and cylinder II are located on both sides of the hydraulic cylinder, and the two ends of the hydraulic cylinder are respectively connected to cylinder I and cylinder II through block I and block II. In the present invention, cylinder I and cylinder II have the same inner diameter and are arranged symmetrically, the purpose of which is to ensure that the piston force in cylinder I and the piston force in cylinder II can be balanced with each other to reduce power consumption. In addition, the symmetrical arrangement of the same model can further reduce the probability of uneven force during the use of the equipment.

[0021] 2. On the one hand, the present invention separates oil and gas between the hydraulic cylinder and the air cylinder through the seal on the block and the scraper, ensuring that the compressed gas is not contaminated by the hydraulic oil and the purity of the gas. In addition, the present invention is also equipped with a balancing gas tank and a hydraulic oil recovery tank. The balancing gas tank can prevent the occurrence of a negative pressure vacuum state during the operation of the hydrogen compression cylinder. The hydraulic oil recovery tank is convenient for recovering the hydraulic oil on the piston rod. At the same time, a spiral cooling water jacket is installed on the outside of the cylinder sleeve, and the cylinder can be further cooled by the spiral cooling water jacket. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the internal structure of the hydrogen hydraulic compressor booster pump;

[0023] Figure 2 Schematic diagram of the internal structure of the cylinder;

[0024] Figure 3 Schematic diagram of the piston rod structure.

[0025] Among them, 1-cylinder I, 2-hydraulic cylinder, 3-cylinder II, 4-stopper I, 5-stopper II, 6-cylinder I piston, 7-hydraulic cylinder piston, 8-cylinder II piston, 9-balance gas tank, 10-hydraulic oil recovery tank, 11-exhaust port, 12-cylinder head, 13-air inlet, 14-cylinder seat one-way valve, 15-cylinder liner, 16-spiral cooling water jacket, 17-water inlet, 18-water outlet, 19-air path I, 20-hydraulic system oil port, 21-hydraulic oil recovery port I, 22-support ring, 23-dustproof ring, 24-piston rod sealing ring. DETAILED DESCRIPTION

[0026] In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0027] Example 1:

[0028] like Figure 1-3 As shown, a hydrogen liquid-driven compressor booster pump includes a base, on which a hydrogen compression cylinder, a hydraulic system, a balancing gas tank 9, and a hydraulic oil recovery tank 10 are installed; the hydraulic system drives the piston in the hydrogen compression cylinder to move back and forth to compress the hydrogen in the cylinder body; wherein the hydrogen compression cylinder is composed of a coaxial cylinder I1, a hydraulic cylinder 2, and a cylinder II3; cylinder I and cylinder II are located on both sides of the hydraulic cylinder, and the two ends of the hydraulic cylinder are connected to cylinder I and cylinder II respectively through block I4 and block II5; a cylinder I piston is installed in cylinder I, and the cylinder I piston divides cylinder I into a compression chamber I and a buffer chamber I, and the buffer chamber I is adjacent to block I; a cylinder II piston is also installed in cylinder II; the cylinder II piston divides cylinder II into a buffer chamber II and Compressed air chamber II and buffer chamber II are adjacent to block II. The cylinder I piston in cylinder I, the hydraulic cylinder piston in the hydraulic cylinder, and the cylinder II piston in cylinder II are connected together via a piston rod that runs through cylinder I, block I, the hydraulic cylinder, block II, and cylinder II, forming a single unit and operating in tandem. The hydraulic system drives the hydraulic cylinder piston in the hydraulic cylinder to reciprocate. The hydraulic cylinder piston 7 in the hydraulic cylinder drives the cylinder I piston 6 in cylinder I and the cylinder II piston 8 in cylinder II to reciprocate via the piston rod, compressing hydrogen through cylinders I and II. The hydraulic system drives the piston in the hydraulic cylinder that constitutes the hydrogen hydraulic compressor booster pump to reciprocate, which in turn drives the piston in the hydrogen compression cylinder to reciprocate, compressing the hydrogen. The piston rod is composed of two piston rod units connected end to end. The two piston rod units are connected by the piston in the hydraulic cylinder. The outer ends of the piston rod units are connected to the pistons in cylinder I and cylinder II, respectively.

[0029] Furthermore, an air path channel I19 connected to the buffer chamber I is opened on the block I, and an air path channel II connected to the buffer chamber II is opened on the block II, and the balancing gas tank 9 is installed between the air path channel I19 and the air path channel II; an exhaust port 13 is installed on the balancing gas tank 9, and the balancing gas tank assists the operation of the cylinder I and the cylinder II constituting the hydrogen hydraulic compressor booster pump, thereby improving the stability of operation and increasing the service life.

[0030] In the present invention, a hydraulic oil recovery port I 21 is provided on the stopper I at the position where the piston rod is in contact, and a hydraulic oil recovery port II is provided on the stopper II at the position where the piston rod is in contact. A hydraulic oil recovery tank 10 is connected between the hydraulic oil recovery port I and the hydraulic oil recovery port II. In this way, the trace hydraulic oil brought out by the piston rod of the hydraulic cylinder will not enter the cylinder I and the cylinder II, so as to ensure that even if hydrogen or hydraulic oil leaks, they will not contaminate each other, thereby ensuring the purity of hydrogen. At the same time, it can also be recovered to reduce the pollution hazard to the environment.

[0031] Cylinders I and II each consist of a cylinder head, cylinder liner, cylinder base, a piston built into the cylinder body, and a spiral cooling water jacket 16 wrapped around the outer surface of the cylinder liner. Cylinders I and II form a sealed cylinder body. The cylinder head is equipped with an air inlet and an air outlet, each of which is fitted with a cylinder base check valve 14. This design reduces clearance within the hydrogen compression cylinder and improves compression efficiency. A spiral cooling water jacket 16, with an inlet 17 and an outlet 18, is installed outside the cylinder liner 15. Cooling water flows through the spiral cooling water jacket. When the piston reciprocates within the cylinder, significant heat is generated. The cooling water in the jacket cools the cylinder body, ensuring safety and extending the life of the piston. The piston built into the cylinder body is bolted to the piston rod for easy maintenance and replacement. An exhaust port is installed on the balance gas tank, and check valves are installed at the external interfaces of gas channels I and II. Both stopper I and stopper II are equipped with a hydraulic system oil port that is connected to the inner chamber of the hydraulic cylinder. The hydraulic system oil port 20 is connected to the hydraulic system through a pipeline.

[0032] Furthermore, in the present invention, cylinders I and II have the same inner diameter and are symmetrically arranged. The purpose is to ensure that the piston force in cylinder I and the piston force in cylinder II can balance each other to reduce power consumption. In addition, the symmetrical arrangement of the same model can further reduce the probability of uneven force during the use of the equipment. Piston rod sealing rings 24, dust rings 23, and support rings 22 are coaxially installed on block I and block II in the direction toward cylinder I and cylinder II, respectively. Multiple piston rod sealing rings are symmetrically installed along the hydraulic oil recovery port I on block I, and multiple piston rod sealing rings are symmetrically installed along the hydraulic oil recovery port II on block II to ensure that there is no gas leakage. The working pressure of the piston ring reaches 90MPa. The piston ring is a self-lubricating piston ring and does not require lubricating oil during operation, and will not cause pollution to the hydrogen.

[0033] As a preferred solution, in the present invention, both ends of block I are respectively equipped with bosses I that cooperate with the cylinder body of cylinder I and the inner wall of the cylinder body of the hydraulic cylinder, and both ends of block II are respectively equipped with bosses II that cooperate with the cylinder body of cylinder II and the inner wall of the cylinder body of the hydraulic cylinder. Seals are installed at the two contact surface positions of block I and cylinder I, and seals are installed at the two contact surface positions of block II and cylinder II, which can further improve the sealing performance at the connection position and prevent air leakage and liquid leakage.

[0034] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0035] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A hydrogen liquid drive compressor booster pump, comprising a base, characterized in that: The base is provided with a hydrogen compression cylinder, a hydraulic system, a balance gas tank, and a hydraulic oil recovery tank; the hydraulic system drives the piston in the hydrogen compression cylinder to move back and forth to compress the hydrogen in the cylinder; The hydrogen compression cylinder is composed of a coaxial cylinder I, a hydraulic cylinder, and a cylinder II; cylinder I and cylinder II are located on both sides of the hydraulic cylinder, and the two ends of the hydraulic cylinder are connected to cylinder I and cylinder II respectively through block I and block II; A piston is provided in the cylinder I, which divides the cylinder I into a compression chamber I and a buffer chamber I, and the buffer chamber I is adjacent to the stopper I; a piston is also provided in the cylinder II; a piston is also provided in the cylinder II, which divides the cylinder II into a buffer chamber II and a compression chamber II, and the buffer chamber II is adjacent to the stopper II; The piston in cylinder I, the piston in the hydraulic cylinder, and the piston in cylinder II are connected together by a piston rod that passes through cylinder I, block I, hydraulic cylinder, block II, and cylinder II, forming a whole and performing linkage. The hydraulic system drives the piston in the hydraulic cylinder to reciprocate, and the piston in the hydraulic cylinder drives the piston in cylinder I and the piston in cylinder II to reciprocate through the piston rod, and hydrogen is compressed and output through cylinder I and cylinder II. The block I is provided with an air path channel I connected to the buffer chamber I, the block II is provided with an air path channel II connected to the buffer chamber II, and the balancing gas tank is arranged between the air path channel I and the air path channel II; the block I is provided with a hydraulic oil recovery port I at a position where the piston rod is in contact with the block, and the block II is provided with a hydraulic oil recovery port II at a position where the piston rod is in contact with the block, and a hydraulic oil recovery tank is connected between the hydraulic oil recovery port I and the hydraulic oil recovery port II.

2. A hydrogen liquid drive compressor booster pump according to claim 1, characterized in that: The cylinder I and cylinder II are both composed of a cylinder head, a cylinder liner, a cylinder seat, a piston built into the cylinder body and a spiral cooling water jacket sleeved outside the cylinder liner. Cylinder I and cylinder II form a closed cylinder body; an air inlet and an air outlet are provided on the cylinder head, and a cylinder seat one-way valve is provided at the air inlet and the air outlet; the spiral cooling water jacket is provided outside the cylinder liner, and the spiral cooling water jacket is provided with a water inlet and a water outlet, and cooling water flows in the spiral cooling water jacket; the piston built into the cylinder body is connected to the piston rod by bolts.

3. The hydrogen liquid drive compressor booster pump according to claim 1, characterized in that: The balancing gas tank is provided with an exhaust port, and the external interface positions of the gas path channel I and the gas path channel II are provided with a one-way valve.

4. A hydrogen liquid drive compressor booster pump according to claim 1, characterized in that: The stopper I and the stopper I are both provided with a hydraulic system oil port that is in communication with the inner chamber of the hydraulic cylinder, and the hydraulic system oil port is connected to the hydraulic system through a pipeline.

5. The hydrogen liquid drive compressor booster pump according to claim 1, characterized in that: The cylinders I and II have the same inner diameter and are symmetrically arranged.

6. The hydrogen liquid drive compressor booster pump according to claim 1, characterized in that: The piston rod sealing ring, dust ring and support ring are coaxially arranged on the block I and block II in the direction toward cylinder I and cylinder II respectively. There are multiple piston rod sealing rings on the block I symmetrically arranged along the hydraulic oil recovery port I, and there are multiple piston rod sealing rings on the block II symmetrically arranged along the hydraulic oil recovery port II.

7. The hydrogen liquid drive compressor booster pump according to claim 1, characterized in that: The piston rod is composed of two piston rod units connected end to end. The two piston rod units are connected through the piston in the hydraulic cylinder. The outer ends of the piston rod units are respectively connected to the piston in cylinder I and the piston in cylinder II.

8. The hydrogen liquid drive compressor booster pump according to claim 1, characterized in that: The two ends of the block I are respectively provided with bosses I that cooperate with the cylinder body of cylinder I and the inner wall of the cylinder body of the hydraulic cylinder. The two ends of the block II are respectively provided with bosses II that cooperate with the cylinder body of cylinder II and the inner wall of the cylinder body of the hydraulic cylinder. The two contact surfaces of the block I and the cylinder I are both provided with seals, and the two contact surfaces of the block II and the cylinder II are both provided with seals.

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