Double-cylinder double-acting reciprocating supercharger

Abstract

The double-cylinder double-acting reciprocating supercharger comprises a first pressure cylinder, a first signal port is formed in the left side of the first pressure cylinder, a second signal port is formed in the right side of the first pressure cylinder, and the first signal port is connected with the left side of a first reversing valve and the left side of a second reversing valve. The first reversing valve and the second reversing valve are two-position five-way reversing valves, the second signal port is connected with the right side of the first reversing valve and the right side of the second reversing valve, the second reversing valve is connected with a second pressure cylinder, and the first reversing valve and the second reversing valve are jointly connected with an oil return channel and a high-pressure oil channel. The same sides of the first pressure cylinder and the second pressure cylinder are connected with an HP port through a first oil duct, the same sides of the second pressure cylinder and the first pressure cylinder are connected with the HP port through a second oil duct, and the problem that in the prior art, pressure interlocking and a damping hole arranged in a reciprocating type supercharger in a hydraulic mode affect stable operation of the supercharger is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydraulic boosters and relates to a double-cylinder double-acting reciprocating booster. Background Technique

[0002] As a device for synthesizing artificial diamonds independently developed in China, the hinge-type six-sided top press has achieved the development of the artificial diamond industry in China and the world. This press uses an ultra-high pressure hydraulic system with an oil pressure of up to 100 MPa. The main working process of the hydraulic system is as follows: the oil cylinder moves forward empty, quickly boosts the pressure to 6 MPa, then slowly overpressures to about 100 MPa and maintains it, and finally depressurizes.

[0003] At present, the commonly used booster devices are single-acting boosters and double-acting reciprocating boosters. The traditional single-acting booster obtains high-pressure oil by driving with low-pressure oil, has large flow pulsation, large volume, low utilization rate of hydraulic energy, and has a stroke limit. The double-acting reciprocating booster has the advantages of small volume, no stroke limit, and high utilization rate of hydraulic energy, and has been widely used. However, during the use of the double-acting reciprocating booster in the hinge-type six-sided top press, the stability of its operation still needs to be further improved.

[0004] In a fully automatic double-acting continuous reciprocating hydraulic booster disclosed in a patent with the publication number CN207945138U and a double-cylinder reciprocating ultra-high pressure booster disclosed in a patent with the publication number CN215109748U, since 4 one-way valves control the hydraulic directional valve to change direction, once a certain one-way valve fails, the booster will not work, and it is necessary to check one by one during maintenance to determine the fault point; at the same time, due to the hydraulic interlock mechanism between the two cylinder bodies of the booster, once a fault occurs in a certain cylinder body, the booster will surely not work. These problems will all affect the stability during the operation of the booster.

[0005] In a double-acting reciprocating hydraulic booster disclosed in a patent with the publication number CN102287407A and a low-noise double-connected booster disclosed in a patent with the publication number CN215762493U, since there is a damping hole in the spool of the hydraulic directional valve, once it is blocked or enlarged during operation, the booster will not work. These problems will all affect the stability during the operation of the booster. Content of the Utility Model

[0006] The purpose of the utility model is to provide a double-cylinder double-acting reciprocating booster to solve the problem that the hydraulic interlock and damping holes set in the reciprocating booster in the prior art affect the stable operation of the booster.

[0007] The technical solution adopted by the present utility model is a double-cylinder double-acting reciprocating supercharger, which includes a first supercharging cylinder. A first signal port is opened on the left side of the first supercharging cylinder, and a second signal port is opened on the right side of the first supercharging cylinder. The first signal port is respectively connected to the left side of a first reversing valve and the left side of a second reversing valve. Both the first reversing valve and the second reversing valve are two-position five-way reversing valves. The second signal port is respectively connected to the right side of the first reversing valve and the right side of the second reversing valve. The second reversing valve is connected to a second supercharging cylinder. The first reversing valve and the second reversing valve are jointly connected to an oil return passage and a high-pressure oil passage. The first supercharging cylinder and the second supercharging cylinder on the same side are both connected to an HP port through a first oil passage, and the second supercharging cylinder and the other side of the first supercharging cylinder are both connected to the HP port through a second oil passage.

[0008] The characteristics of the present utility model also lie in:

[0009] The first supercharging cylinder includes a first cylinder block. A first plunger adapted to the inner wall of the first cylinder block is provided in the first cylinder block. Both ends of the first plunger are connected with a second plunger. Both ends of the first cylinder block are communicated with a second cylinder block. The axes of the first cylinder block and the second cylinder block coincide, and the diameter of the first cylinder block is larger than that of the second cylinder block. The second plunger is located in the second cylinder block and the first cylinder block and is adapted to the inner wall of the second cylinder block. A first low-pressure cavity is formed between the first plunger and the left side of the first cylinder block in the first cylinder block, a second low-pressure cavity is formed between the first plunger and the right side of the first cylinder block in the first cylinder block, a first high-pressure cavity is formed between the second plunger and the left side of the second cylinder block in the second cylinder block, and a second high-pressure cavity is formed between the second plunger and the right side of the second cylinder block in the second cylinder block.

[0010] Both the first signal port and the second signal port are arranged near the first reversing valve on the first cylinder block. The distance from the first signal port to the port of the first cylinder block near the first signal port is equal to the distance from the second signal port to the port of the first cylinder block near the second signal port. The distance between the first signal port and the second signal port is not greater than the length of the first plunger.

[0011] The second supercharging cylinder includes a third cylinder block. A third plunger adapted to the inner wall of the third cylinder block is provided in the third cylinder block. Both ends of the third plunger are connected with a fourth plunger. Both ends of the third cylinder block are communicated with a fourth cylinder block. The axes of the third cylinder block and the fourth cylinder block coincide, and the diameter of the third cylinder block is larger than that of the fourth cylinder block. The fourth plunger is located in the third cylinder block and the fourth cylinder block and is adapted to the inner wall of the fourth cylinder block. A third low-pressure cavity is formed between the third plunger and the left side of the third cylinder block in the third cylinder block, a fourth low-pressure cavity is formed between the third plunger and the right side of the third cylinder block in the third cylinder block, a third high-pressure cavity is formed between the fourth plunger and the left side of the fourth cylinder block in the fourth cylinder block, and a fourth high-pressure cavity is formed between the fourth plunger and the right side of the fourth cylinder block in the fourth cylinder block.

[0012] The first reversing valve is provided with a first oil port, a second oil port, a third oil port and a fourth oil port. The first oil port is communicated with the first low-pressure chamber through an oil pipe. The oil pipe connecting the first oil port and the first low-pressure chamber is communicated with the left side of the first reversing valve through an oil pipe. A first check valve is provided on the oil pipe connecting the left side of the first reversing valve and the first low-pressure chamber. The second oil port is connected with the second low-pressure chamber through an oil pipe. The oil pipe connecting the second oil port and the second low-pressure chamber is communicated with the right side of the first reversing valve through an oil pipe. A second check valve is provided on the oil pipe connecting the right side of the first reversing valve and the second low-pressure chamber. The third oil port is communicated with the high-pressure oil passage through an oil pipe. The fourth oil port is communicated with the oil return passage through an oil pipe.

[0013] The second reversing valve is provided with a fifth oil port, a sixth oil port, a seventh oil port and an eighth oil port. The fifth oil port is communicated with the third low-pressure chamber through an oil pipe. The sixth oil port is communicated with the fourth low-pressure chamber through an oil pipe. The seventh oil port is communicated with the high-pressure oil passage through an oil pipe. The eighth oil port is communicated with the oil return passage. The left sides of the first reversing valve and the second reversing valve are both communicated with the first signal port through an oil passage. The right sides of the first reversing valve and the second reversing valve are both connected with the second signal port through an oil passage.

[0014] The first oil passage includes a first connecting pipe that connects the first low-pressure chamber and the first high-pressure chamber. A third check valve is provided on the first connecting pipe. The third low-pressure chamber and the third high-pressure chamber are communicated through a second connecting pipe. A fourth check valve is provided on the second connecting pipe. The first low-pressure chamber and the third low-pressure chamber are communicated through a third connecting pipe. Fifth check valves are provided near the first low-pressure chamber and the third low-pressure chamber on the third connecting pipe. The third connecting pipe is communicated with the HP port through a fourth connecting pipe. A sixth check valve is provided on the fourth connecting pipe.

[0015] The second oil passage includes a fifth connecting pipe that connects the second low-pressure chamber and the second high-pressure chamber. A seventh check valve is provided on the fifth connecting pipe. The fourth low-pressure chamber and the fourth high-pressure chamber are communicated through a sixth connecting pipe. An eighth check valve is provided on the sixth connecting pipe. The fourth high-pressure chamber and the second high-pressure chamber are communicated through a seventh connecting pipe. Ninth check valves are provided near the fourth high-pressure chamber and the second high-pressure chamber on the seventh connecting pipe. The seventh connecting pipe is communicated with the HP port through an eighth connecting pipe. The sixth check valve is provided on the eighth connecting pipe.

[0016] The beneficial effects of the present utility model are as follows: The double-cylinder supercharging setting is adopted, and the two supercharging cylinders are driven to move through the cooperation of two reversing valves, canceling the inertial force and vibration; the two supercharging cylinders are in a master-slave relationship, and the movement of the driven supercharging cylinder is only related to the active supercharging cylinder. The active supercharging cylinder can control the reversing of the reversing valve, reducing the probability that the supercharger completely fails to work due to the pulling or jamming of the plunger, improving the stability of the supercharger; the oil passage and the check valve are provided to control the reversing of the reversing valve, simplifying the structure of the reversing valve and saving the processing cost. Description of the Drawings

[0017] Figure 1 is a schematic structural diagram of the double-cylinder double-acting reciprocating supercharger of the present utility model;

[0018] Figure 2 is a schematic structural diagram of the first supercharging cylinder in the double-cylinder double-acting reciprocating supercharger of the present utility model;

[0019] Figure 3 is a schematic structural diagram of the second supercharging cylinder in the double-cylinder double-acting reciprocating supercharger of the present utility model;

[0020] Figure 4 is a schematic structural diagram of the first reversing valve in the double-cylinder double-acting reciprocating supercharger of the present utility model;

[0021] Figure 5 is a schematic structural diagram of the second reversing valve in the double-cylinder double-acting reciprocating supercharger of the present utility model;

[0022] Figure 6 is a schematic structural diagram of the first oil passage and the second oil passage in the double-cylinder double-acting reciprocating supercharger of the present utility model.

[0023] In the figure, 1. First supercharging cylinder, 101. First cylinder block, 102. First plunger, 103. Second plunger, 104. Second cylinder block, 105. First low-pressure chamber, 106. Second low-pressure chamber, 107. First high-pressure chamber, 108. Second high-pressure chamber, 2. First signal port, 3. Second signal port, 4. First reversing valve, 401. First oil port, 402. Second oil port, 403. Third oil port, 404. Fourth oil port, 405. First check valve, 406. Second check valve, 5. Second reversing valve, 501. Fifth oil port, 502. Sixth oil port, 503. Seventh oil port, 504. Eighth oil port, 6. Second supercharging cylinder, 601. Third cylinder block, 602. Third plunger, 603. Fourth plunger, 604. Fourth cylinder block, 605. Third low-pressure chamber, 606. Fourth low-pressure chamber, 607. Third high-pressure chamber, 608. Fourth high-pressure chamber, 7. Oil return passage, 8. First oil passage, 801. First connecting pipe, 802. Third check valve, 803. Second connecting pipe, 804. Fourth check valve, 805. Third connecting pipe, 806. Fifth check valve, 807. Fourth connecting pipe, 808. Sixth check valve, 9. HP port, 10. Second oil passage, 1001. Fifth connecting pipe, 1002. Seventh check valve, 1003. Sixth connecting pipe, 1004. Eighth check valve, 1005. Seventh connecting pipe, 1006. Ninth check valve, 1007. Eighth connecting pipe, 11. High-pressure oil passage. Detailed implementation manners

[0024] The present utility model will be described in detail below with reference to the accompanying drawings and specific implementation manners.

[0025] A double-cylinder double-acting reciprocating supercharger, such as Figure 1 shown, includes a first supercharging cylinder 1. A first signal port 2 is provided on the left side of the first supercharging cylinder 1, and a second signal port 3 is provided on the right side of the first supercharging cylinder 1. The first signal port 2 is respectively connected to the left sides of a first reversing valve 4 and a second reversing valve 5. Both the first reversing valve 4 and the second reversing valve 5 are two-position five-way reversing valves. The second signal port 3 is respectively connected to the right sides of the first reversing valve 4 and the second reversing valve 5. The second reversing valve 4 is connected to a second supercharging cylinder 6. The first reversing valve 4 and the second reversing valve 5 are jointly connected to an oil return passage 7 and a high-pressure oil passage 11. The first supercharging cylinder 1 and the second supercharging cylinder 6 on the same side are both connected to an HP port 9 through a first oil passage 8, and the second supercharging cylinder 6 and the other side of the first supercharging cylinder 1 are both connected to the HP port 9 through a second oil passage 10.

[0026] As Figure 2 shown, the first supercharging cylinder 1 includes a first cylinder block 101. A first plunger 102 adapted to the inner wall of the first cylinder block 101 is provided in the first cylinder block 101. Both ends of the first plunger 102 are connected to a second plunger 103. Both ends of the first cylinder block 101 are communicated with a second cylinder block 104. The axis of the first cylinder block 101 coincides with that of the second cylinder block 104, and the diameter of the first cylinder block 101 is larger than that of the second cylinder block 104. The second plunger 103 is located in the second cylinder block 104 and the first cylinder block 101 and is adapted to the inner wall of the second cylinder block 104. A first low-pressure chamber 105 is formed between the first plunger 102 and the first cylinder block 101 on the left side of the first cylinder block 101, a second low-pressure chamber 106 is formed between the first plunger 102 and the first cylinder block 101 on the right side of the first cylinder block 101, a first high-pressure chamber 107 is formed between the second plunger 103 and the second cylinder block 104 on the left side of the second cylinder block 104, and a second high-pressure chamber 108 is formed between the second plunger 103 and the second cylinder block 104 on the right side of the second cylinder block 104.

[0027] Both the first signal port 2 and the second signal port 3 are arranged near the first reversing valve 4 on the first cylinder block 101. The distance from the first signal port 2 to the port of the first cylinder block 101 near the first signal port 2 is equal to the distance from the second signal port 3 to the port of the first cylinder block 101 near the second signal port 3. The distance between the first signal port 2 and the second signal port 3 is not greater than the length of the first plunger 102.

[0028] As Figure 3As shown in the figure, the second supercharging cylinder 6 includes a third cylinder block 601. A third plunger 602 adapted to the inner wall of the third cylinder block 601 is provided in the third cylinder block 601. Fourth plungers 603 are connected to both ends of the third plunger 602. Fourth cylinder blocks 604 are communicated with both ends of the third cylinder block 601. The axis of the third cylinder block 601 coincides with that of the fourth cylinder block 604, and the diameter of the third cylinder block 601 is larger than that of the fourth cylinder block 604. The fourth plungers 603 are located in the third cylinder block 601 and the fourth cylinder block 604 and are adapted to the inner wall of the fourth cylinder block 604. A third low-pressure chamber 605 is formed between the left side of the third plunger 602 and the inner wall of the third cylinder block 601. A fourth low-pressure chamber 606 is formed between the right side of the third plunger 602 and the inner wall of the third cylinder block 601. A third high-pressure chamber 607 is formed between the left side of the fourth plunger 603 and the inner wall of the fourth cylinder block 604. A fourth high-pressure chamber 608 is formed between the right side of the fourth plunger 603 and the inner wall of the fourth cylinder block 604.

[0029] As Figure 4 shown in the figure, the first reversing valve 4 is provided with a first oil port 401, a second oil port 402, a third oil port 403 and a fourth oil port 404. The first oil port 401 is communicated with the first low-pressure chamber 105 through an oil pipe. The oil pipe connecting the first oil port 401 and the first low-pressure chamber 105 is communicated with the left side of the first reversing valve 4 through an oil pipe. A first one-way valve 405 is provided on the oil pipe connecting the left side of the first reversing valve 4 and the first low-pressure chamber 105. The second oil port 402 is connected to the second low-pressure chamber 106 through an oil pipe. The oil pipe connecting the second oil port 402 and the second low-pressure chamber 106 is communicated with the right side of the first reversing valve 4 through an oil pipe. A second one-way valve 406 is provided on the oil pipe connecting the right side of the first reversing valve 4 and the second low-pressure chamber 106. The third oil port 403 is communicated with the high-pressure oil passage 11 through an oil pipe. The fourth oil port 404 is communicated with the oil return passage 7 through an oil pipe.

[0030] As Figure 5 shown in the figure, the second reversing valve 5 is provided with a fifth oil port 501, a sixth oil port 502, a seventh oil port 503 and an eighth oil port 504. The fifth oil port 501 is communicated with the third low-pressure chamber 605 through an oil pipe. The sixth oil port 502 is communicated with the fourth low-pressure chamber 606 through an oil pipe. The seventh oil port 503 is communicated with the high-pressure oil passage 11 through an oil pipe. The eighth oil port 504 is communicated with the oil return passage 7. The left sides of the first reversing valve 4 and the second reversing valve 5 are both communicated with the first signal port 2 through an oil passage. The right sides of the first reversing valve 4 and the second reversing valve 5 are both connected to the second signal port 3 through an oil passage.

[0031] As Figure 6As shown in the figure, the first oil passage 8 includes a first connecting pipe 801 that connects the first low-pressure chamber 105 and the first high-pressure chamber 107. A third one-way valve 802 is provided on the first connecting pipe 801. The third low-pressure chamber 605 and the third high-pressure chamber 607 are connected through a second connecting pipe 803. A fourth one-way valve 804 is provided on the second connecting pipe 803. The first low-pressure chamber 105 and the third low-pressure chamber 605 are connected through a third connecting pipe 805. Fifth one-way valves 806 are provided near the first low-pressure chamber 105 and the third low-pressure chamber 605 on the third connecting pipe 805. The third connecting pipe 805 is connected to the HP port 9 through a fourth connecting pipe 807. A sixth one-way valve 808 is provided on the fourth connecting pipe 807.

[0032] The second oil passage 10 includes a fifth connecting pipe 1001 that connects the second low-pressure chamber 106 and the second high-pressure chamber 108. A seventh one-way valve 1002 is provided on the fifth connecting pipe 1001. The fourth low-pressure chamber 606 and the fourth high-pressure chamber 608 are connected through a sixth connecting pipe 1003. An eighth one-way valve 1004 is provided on the sixth connecting pipe 1003. The fourth high-pressure chamber 608 and the second high-pressure chamber 108 are connected through a seventh connecting pipe 1005. Ninth one-way valves 1006 are provided near the fourth high-pressure chamber 608 and the second high-pressure chamber 108 on the seventh connecting pipe 1005. The seventh connecting pipe 1005 is connected to the HP port 9 through an eighth connecting pipe 1007. The sixth one-way valve 808 is provided on the eighth connecting pipe 1007.

[0033] Among them, when the spool of the first reversing valve 4 moves leftward, the third oil port 403 is connected to the first oil port 401, and the second oil port 402 is connected to the oil return passage 7; when the spool of the first reversing valve 4 moves rightward, the third oil port 403 is connected to the second oil port 402, and the first oil port 401 is connected to the oil return passage 7; when the spool of the second reversing valve 5 moves leftward, the seventh oil port 503 is connected to the sixth oil port 502, and the fifth oil port 501 is connected to the oil return passage 7; when the spool of the second reversing valve 5 moves rightward, the seventh oil port 503 is connected to the fifth oil port 501, and the sixth oil port 502 is connected to the oil return passage 7.

[0034] The working process is as follows: At the beginning, the first plunger 102 in the first boosting cylinder 1 and the third plunger 602 in the second boosting cylinder 6 are at the center. When the first plunger 102 moves leftward into the second low-pressure chamber 106 where the second signal port 3 is located, high-pressure oil flows into the first reversing valve 4 and the second reversing valve 5 through the second signal port 3 via the oil pipe and pushes the valve core to move leftward; when the valve core of the first reversing valve 4 moves leftward, the third oil port 403 communicates with the first oil port 401, and the second oil port 402 communicates with the oil return passage 7. High-pressure oil flows into the first low-pressure chamber 105 and the first high-pressure chamber 107 through the first oil port 401. When there is enough oil in the first low-pressure chamber 105 and the first high-pressure chamber 107, it pushes the first plunger 102 to move rightward; when the valve core of the second reversing valve 5 moves leftward, the seventh oil port 503 communicates with the sixth oil port 502, and the fifth oil port 501 communicates with the oil return passage 7. High-pressure oil flows into the fourth high-pressure chamber 608 and the fourth low-pressure chamber 606 through the sixth oil port 502. When there is enough oil in the fourth high-pressure chamber 608 and the fourth low-pressure chamber 606, it pushes the third plunger 602 to move leftward.

[0035] When the first plunger 102 moves rightward into the first low-pressure chamber 105 where the first signal port 2 is located, high-pressure oil flows into the first reversing valve 4 and the second reversing valve 5 through the first signal port 2 and pushes the valve core to move rightward. When the valve core of the first reversing valve 4 moves rightward, the third oil port 403 communicates with the second oil port 402, and the first oil port 401 communicates with the oil return passage 7. High-pressure oil flows into the second high-pressure chamber 108 and the second low-pressure chamber 106 after passing through the second oil port 402. When there is enough oil in the second high-pressure chamber 108 and the second low-pressure chamber 106, it pushes the first plunger 102 to move leftward; when the second reversing valve 5 moves rightward, the seventh oil port 503 communicates with the fifth oil port 501, and the sixth oil port 502 communicates with the oil return passage 7. High-pressure oil flows into the third low-pressure chamber 605 and the third high-pressure chamber 607 through the fifth oil port 501. When there is enough oil in the third low-pressure chamber 605 and the third high-pressure chamber 607, it pushes the third plunger 602 to move rightward.

[0036] Embodiment 1

[0037] The double-cylinder double-action reciprocating supercharger of the present utility model includes a first boosting cylinder 1. A first signal port 2 is opened on the left side of the first boosting cylinder 1, and a second signal port 3 is opened on the right side of the first boosting cylinder 1. The first signal port 2 is respectively connected to the left sides of a first reversing valve 4 and a second reversing valve 5. Both the first reversing valve 4 and the second reversing valve 5 are two-position five-way reversing valves. The second signal port 3 is respectively connected to the right sides of the first reversing valve 4 and the second reversing valve 5. The second reversing valve 4 is connected to a second boosting cylinder 6. The first reversing valve 4 and the second reversing valve 5 are jointly connected to an oil return passage 7 and a high-pressure oil passage 11. The first boosting cylinder 1 and the second boosting cylinder 6 on the same side are both connected to an HP port 9 through a first oil passage 8, and the other side of the second boosting cylinder 6 and the first boosting cylinder 1 are both connected to the HP port 9 through a second oil passage 10.

[0038] Embodiment 2

[0039] The double-cylinder double-acting reciprocating supercharger of the utility model includes a first supercharging cylinder 1. A first signal port 2 is provided on the left side of the first supercharging cylinder 1, and a second signal port 3 is provided on the right side of the first supercharging cylinder 1. The first signal port 2 is respectively connected to the left side of a first reversing valve 4 and the left side of a second reversing valve 5. The second signal port 3 is respectively connected to the right side of the first reversing valve 4 and the right side of the second reversing valve 5. Both the first reversing valve 4 and the second reversing valve 5 are two-position five-way reversing valves. The second reversing valve 4 is connected to a second supercharging cylinder 6. The first reversing valve 4 and the second reversing valve 5 are jointly connected to an oil return passage 7 and a high-pressure oil passage 11. The first supercharging cylinder 1 and the second supercharging cylinder 6 on the same side are both connected to an HP port 9 through a first oil passage 8, and the second supercharging cylinder 6 and the other side of the first supercharging cylinder 1 are both connected to the HP port 9 through a second oil passage 10.

[0040] The first supercharging cylinder 1 includes a first cylinder block 101. A first plunger 102 adapted to the inner wall of the first cylinder block 101 is provided in the first cylinder block 101. Both ends of the first plunger 102 are connected to a second plunger 103. Both ends of the first cylinder block 101 communicate with a second cylinder block 104. The axis of the first cylinder block 101 coincides with that of the second cylinder block 104 and the diameter of the first cylinder block 101 is larger than that of the second cylinder block 104. The second plunger 103 is located in the second cylinder block 104 and the first cylinder block 101 and is adapted to the inner wall of the second cylinder block 104. A first low-pressure chamber 105 is formed between the first plunger 102 and the first cylinder block 101 on the left side of the first cylinder block 101, and a second low-pressure chamber 106 is formed between the first plunger 102 and the first cylinder block 101 on the right side of the first cylinder block 101. A first high-pressure chamber 107 is formed between the second plunger 103 and the second cylinder block 104 on the left side of the second cylinder block 104, and a second high-pressure chamber 108 is formed between the second plunger 103 and the second cylinder block 104 on the right side of the second cylinder block 104.

[0041] Both the first signal port 2 and the second signal port 3 are arranged near the first reversing valve 4 on the first cylinder block 101. The distance from the first signal port 2 to the port of the first cylinder block 101 near the first signal port 2 is equal to the distance from the second signal port 3 to the port of the first cylinder block 101 near the second signal port 3. The distance between the first signal port 2 and the second signal port 3 is not greater than the length of the first plunger 102.

[0042] The second supercharging cylinder 6 includes a third cylinder block 601. A third plunger 602 adapted to the inner wall of the third cylinder block 601 is provided in the third cylinder block 601. Fourth plungers 603 are connected to both ends of the third plunger 602. Fourth cylinder blocks 604 are communicated with both ends of the third cylinder block 601. The axis of the third cylinder block 601 coincides with that of the fourth cylinder block 604 and the diameter of the third cylinder block 601 is greater than that of the fourth cylinder block 604. The fourth plungers 603 are located in the third cylinder block 601 and the fourth cylinder block 604 and are adapted to the inner wall of the fourth cylinder block 604. A third low-pressure chamber 605 is formed between the left side of the third plunger 602 and the inner wall of the third cylinder block 601 in the third cylinder block 601. A fourth low-pressure chamber 606 is formed between the right side of the third plunger 602 and the inner wall of the third cylinder block 601 in the third cylinder block 601. A third high-pressure chamber 607 is formed between the left side of the fourth plunger 603 and the inner wall of the fourth cylinder block 604 in the fourth cylinder block 604. A fourth high-pressure chamber 608 is formed between the right side of the fourth plunger 603 and the inner wall of the fourth cylinder block 604 in the fourth cylinder block 604.

[0043] Embodiment 3

[0044] The double-cylinder double-acting reciprocating supercharger of the present utility model includes a first supercharging cylinder 1. A first signal port 2 is opened on the left side of the first supercharging cylinder 1, and a second signal port 3 is opened on the right side of the first supercharging cylinder 1. The first signal port 2 is respectively connected to the left side of a first reversing valve 4 and the left side of a second reversing valve 5. The second signal port 3 is respectively connected to the right side of the first reversing valve 4 and the right side of the second reversing valve 5. Both the first reversing valve 4 and the second reversing valve 5 are two-position five-way reversing valves. The second reversing valve 4 is connected to a second supercharging cylinder 6. The first reversing valve 4 and the second reversing valve 5 are jointly connected to an oil return passage 7 and a high-pressure oil passage 11. The same side of the first supercharging cylinder 1 and the second supercharging cylinder 6 is connected to an HP port 9 through a first oil passage 8, and the other side of the second supercharging cylinder 6 and the first supercharging cylinder 1 is connected to the HP port 9 through a second oil passage 10.

[0045] The first supercharging cylinder 1 includes a first cylinder block 101. A first plunger 102 adapted to the inner wall of the first cylinder block 101 is provided in the first cylinder block 101. Second plungers 103 are connected to both ends of the first plunger 102. Second cylinder blocks 104 are communicated with both ends of the first cylinder block 101. The axis of the first cylinder block 101 coincides with that of the second cylinder block 104 and the diameter of the first cylinder block 101 is greater than that of the second cylinder block 104. The second plungers 103 are located in the second cylinder block 104 and the first cylinder block 101 and are adapted to the inner wall of the second cylinder block 104. A first low-pressure chamber 105 is formed between the left side of the first plunger 102 and the inner wall of the first cylinder block 101 in the first cylinder block 101. A second low-pressure chamber 106 is formed between the right side of the first plunger 102 and the inner wall of the first cylinder block 101 in the first cylinder block 101. A first high-pressure chamber 107 is formed between the left side of the second plunger 103 and the inner wall of the second cylinder block 104 in the second cylinder block 104. A second high-pressure chamber 108 is formed between the right side of the second plunger 103 and the inner wall of the second cylinder block 104 in the second cylinder block 104.

[0046] The first signal port 2 and the second signal port 3 are both arranged near the first reversing valve 4 on the first cylinder block 101. The distance from the first signal port 2 to the port of the first cylinder block 101 near the first signal port 2 is equal to the distance from the second signal port 3 to the port of the first cylinder block 101 near the second signal port 3; the distance between the first signal port 2 and the second signal port 3 is not greater than the length of the first plunger 102.

[0047] The second supercharging cylinder 6 includes a third cylinder block 601. A third plunger 602 adapted to the inner wall of the third cylinder block 601 is arranged in the third cylinder block 601. Fourth plungers 603 are connected to both ends of the third plunger 602. Fourth cylinder blocks 604 are communicated with both ends of the third cylinder block 601. The axis of the third cylinder block 601 coincides with that of the fourth cylinder block 604 and the diameter of the third cylinder block 601 is greater than that of the fourth cylinder block 604. The fourth plungers 603 are located in the third cylinder block 601 and the fourth cylinder block 604 and are adapted to the inner wall of the fourth cylinder block 604. A third low-pressure chamber 605 is formed between the left side of the third plunger 602 and the inner wall of the third cylinder block 601. A fourth low-pressure chamber 606 is formed between the right side of the third plunger 602 and the inner wall of the third cylinder block 601. A third high-pressure chamber 607 is formed between the left side of the fourth plunger 603 and the inner wall of the fourth cylinder block 604. A fourth high-pressure chamber 608 is formed between the right side of the fourth plunger 603 and the inner wall of the fourth cylinder block 604.

[0048] The first reversing valve 4 is provided with a first oil port 401, a second oil port 402, a third oil port 403 and a fourth oil port 404. The first oil port 401 is communicated with the first low-pressure chamber 105 through a pipeline. The pipeline connecting the first oil port 401 and the first low-pressure chamber 105 is communicated with the left side of the first reversing valve 4 through a pipeline. A first one-way valve 405 is arranged on the pipeline connecting the left side of the first reversing valve 4 and the first low-pressure chamber 105. The second oil port 402 is connected with the second low-pressure chamber 106 through a pipeline. The pipeline connecting the second oil port 402 and the second low-pressure chamber 106 is communicated with the right side of the first reversing valve 4 through a pipeline. A second one-way valve 406 is arranged on the pipeline connecting the right side of the first reversing valve 4 and the second low-pressure chamber 106. The third oil port 403 is communicated with the high-pressure oil passage 11 through a pipeline. The fourth oil port 404 is communicated with the oil return passage 7 through a pipeline.

[0049] The second reversing valve 5 is provided with a fifth oil port 501, a sixth oil port 502, a seventh oil port 503 and an eighth oil port 504. The fifth oil port 501 is communicated with the third low-pressure chamber 605 through a pipeline. The sixth oil port 502 is communicated with the fourth low-pressure chamber 606 through a pipeline. The seventh oil port 503 is communicated with the high-pressure oil passage 11 through a pipeline. The eighth oil port 504 is communicated with the oil return passage 7. The left sides of the first reversing valve 4 and the second reversing valve 5 are both communicated with the first signal port 2 through an oil passage. The right sides of the first reversing valve 4 and the second reversing valve 5 are both connected with the second signal port 3 through an oil passage.

Claims

1. A double-cylinder double-acting reciprocating supercharger, characterized in that, It includes a first supercharging cylinder (1). A first signal port (2) is provided on the left side of the first supercharging cylinder (1), and a second signal port (3) is provided on the right side of the first supercharging cylinder (1). The first signal port (2) is respectively connected to the left side of a first reversing valve (4) and the left side of a second reversing valve (5). Both the first reversing valve (4) and the second reversing valve (5) are two-position five-way reversing valves. The second signal port (3) is respectively connected to the right side of the first reversing valve (4) and the right side of the second reversing valve (5). The second reversing valve (4) is connected to a second supercharging cylinder (6). The first reversing valve (4) and the second reversing valve (5) are jointly connected to an oil return passage (7) and a high-pressure oil passage (11). The same side of the first supercharging cylinder (1) and the second supercharging cylinder (6) is connected to an HP port (9) through a first oil passage (8), and the other same side of the second supercharging cylinder (6) and the first supercharging cylinder (1) is connected to the HP port (9) through a second oil passage (10).

2. The double-cylinder double-acting reciprocating supercharger according to claim 1, wherein The first supercharging cylinder (1) includes a first cylinder block (101). A first plunger (102) adapted to the inner wall of the first cylinder block (101) is provided in the first cylinder block (101). Second plungers (103) are connected to both ends of the first plunger (102). Second cylinder blocks (104) are communicated with both ends of the first cylinder block (101). The axis of the first cylinder block (101) coincides with that of the second cylinder block (104), and the diameter of the first cylinder block (101) is larger than that of the second cylinder block (104). The second plungers (103) are located in the second cylinder blocks (104) and the first cylinder block (101) and are adapted to the inner walls of the second cylinder blocks (104). A first low-pressure chamber (105) is formed between the first plunger (102) and the inner wall of the first cylinder block (101) on the left side of the first cylinder block (101). A second low-pressure chamber (106) is formed between the first plunger (102) and the inner wall of the first cylinder block (101) on the right side of the first cylinder block (101). A first high-pressure chamber (107) is formed between the second plunger (103) and the inner wall of the second cylinder block (104) on the left side of the second cylinder block (104). A second high-pressure chamber (108) is formed between the second plunger (103) and the inner wall of the second cylinder block (104) on the right side of the second cylinder block (104).

3. The double-cylinder double-acting reciprocating supercharger according to claim 2, characterized in that, Both the first signal port (2) and the second signal port (3) are provided near the first reversing valve (4) on the first cylinder block (101). The distance from the first signal port (2) to the port of the first cylinder block (101) near the first signal port (2) is equal to the distance from the second signal port (3) to the port of the first cylinder block (101) near the second signal port (3). The distance between the first signal port (2) and the second signal port (3) is not greater than the length of the first plunger (102).

4. The double-cylinder double-acting reciprocating supercharger according to claim 3, characterized in that, The second supercharging cylinder (6) includes a third cylinder block (601). A third plunger (602) adapted to the inner wall of the third cylinder block (601) is provided in the third cylinder block (601). Fourth plungers (603) are connected to both ends of the third plunger (602). Fourth cylinder blocks (604) are communicated with both ends of the third cylinder block (601). The axis of the third cylinder block (601) coincides with that of the fourth cylinder block (604), and the diameter of the third cylinder block (601) is larger than that of the fourth cylinder block (604). The fourth plungers (603) are located in the third cylinder block (601) and the fourth cylinder block (604) and are adapted to the inner wall of the fourth cylinder block (604). A third low-pressure chamber (605) is formed between the left side of the third plunger (602) and the inner wall of the third cylinder block (601). A fourth low-pressure chamber (606) is formed between the right side of the third plunger (602) and the inner wall of the third cylinder block (601). A third high-pressure chamber (607) is formed between the left side of the fourth plunger (603) and the inner wall of the fourth cylinder block (604). A fourth high-pressure chamber (608) is formed between the right side of the fourth plunger (603) and the inner wall of the fourth cylinder block (604).

5. The double-cylinder double-acting reciprocating supercharger according to claim 4, characterized in that, The first reversing valve (4) is provided with a first oil port (401), a second oil port (402), a third oil port (403) and a fourth oil port (404). The first oil port (401) is communicated with the first low-pressure chamber (105) through an oil pipe. The oil pipe connecting the first oil port (401) and the first low-pressure chamber (105) is communicated with the left side of the first reversing valve (4) through an oil pipe. A first one-way valve (405) is provided on the oil pipe connecting the left side of the first reversing valve (4) and the first low-pressure chamber (105). The second oil port (402) is connected with the second low-pressure chamber (106) through an oil pipe. The oil pipe connecting the second oil port (402) and the second low-pressure chamber (106) is communicated with the right side of the first reversing valve (4) through an oil pipe. A second one-way valve (406) is provided on the oil pipe connecting the right side of the first reversing valve (4) and the second low-pressure chamber (106). The third oil port (403) is communicated with the high-pressure oil passage (11) through an oil pipe. The fourth oil port (404) is communicated with the oil return passage (7) through an oil pipe.

6. The double-cylinder double-acting reciprocating supercharger according to claim 5, wherein The second reversing valve (5) is provided with a fifth oil port (501), a sixth oil port (502), a seventh oil port (503) and an eighth oil port (504). The fifth oil port (501) is communicated with the third low-pressure chamber (605) through an oil pipe. The sixth oil port (502) is communicated with the fourth low-pressure chamber (606) through an oil pipe. The seventh oil port (503) is communicated with the high-pressure oil passage (11) through an oil pipe. The eighth oil port (504) is communicated with the oil return passage (7). The left sides of the first reversing valve (4) and the second reversing valve (5) are both communicated with the first signal port (2) through an oil passage. The right sides of the first reversing valve (4) and the second reversing valve (5) are both connected with the second signal port (3) through an oil passage.

7. The double-cylinder double-acting reciprocating supercharger according to claim 6, wherein, The first oil passage (8) includes a first connecting pipe (801) that connects the first low-pressure chamber (105) and the first high-pressure chamber (107). A third one-way valve (802) is provided on the first connecting pipe (801). The third low-pressure chamber (605) and the third high-pressure chamber (607) are connected through a second connecting pipe (803). A fourth one-way valve (804) is provided on the second connecting pipe (803). The first low-pressure chamber (105) and the third low-pressure chamber (605) are connected through a third connecting pipe (805). Fifth one-way valves (806) are provided near the first low-pressure chamber (105) and the third low-pressure chamber (605) on the third connecting pipe (805). The third connecting pipe (805) is connected to the HP port (9) through a fourth connecting pipe (807). A sixth one-way valve (808) is provided on the fourth connecting pipe (807).

8. The double-cylinder double-acting reciprocating supercharger according to claim 7, characterized in that, The second oil passage (10) includes a fifth connecting pipe (1001) that connects the second low-pressure chamber (106) and the second high-pressure chamber (108). A seventh one-way valve (1002) is provided on the fifth connecting pipe (1001). The fourth low-pressure chamber (606) and the fourth high-pressure chamber (608) are connected through a sixth connecting pipe (1003). An eighth one-way valve (1004) is provided on the sixth connecting pipe (1003). The fourth high-pressure chamber (608) and the second high-pressure chamber (108) are connected through a seventh connecting pipe (1005). Ninth one-way valves (1006) are provided near the fourth high-pressure chamber (608) and the second high-pressure chamber (108) on the seventh connecting pipe (1005). The seventh connecting pipe (1005) is connected to the HP port (9) through an eighth connecting pipe (1007). The sixth one-way valve (808) is provided on the eighth connecting pipe (1007).

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