A multi-cylinder ultra-high pressure automatic reciprocating supercharger with an internal circulation cylinder group

Abstract

The present invention relates to a hydraulic booster, and more particularly to a multi-cylinder ultra-high-pressure automatic reciprocating booster with an internal circulation cylinder group, comprising N bidirectional booster cylinders and respective matching reversing valves. The booster chambers of the booster cylinders are provided with control ports, and the booster cylinders are arranged sequentially, that is, each booster cylinder control port is connected to the pilot port of the reversing valve matched to the next booster cylinder, and the Nth booster cylinder is not provided with a control port. Among the N booster cylinders, the first to Xth cylinders are arranged in a sequential cycle, and the X+1th to Nth cylinders are arranged in a sequential cycle, that is, on the basis of the sequential arrangement of the booster cylinders, the booster chamber of the Xth cylinder is further provided with a second control port, and the second control port is connected to the pilot port of the reversing valve matched to the first booster cylinder. The present invention provides an internal circulation cylinder group based on the previous circulating cylinder group, thereby splitting the original large cycle into small cycles, reducing the superposition of low hysteresis, and thus avoiding various problems caused by pilot reversing hysteresis.

Description

Technical Field

[0001] The present invention relates to a hydraulic supercharger, in particular to a multi-cylinder ultra-high pressure automatic reciprocating supercharger provided with an internal circulation cylinder group. Background Art

[0002] Reciprocating superchargers are commonly used in the hydraulic field. Their advantage is that they can achieve continuous pressure output. However, at the moment of reversal, the output pressure drops to zero, causing pulsation in the output pressure. This makes them unsuitable for use in certain applications requiring constant pressure. The conventional solution is to use multiple reciprocating superchargers simultaneously and establish mutual control between the individual boosting cylinders, such as the multi-cylinder ultra-high-pressure automatic reciprocating supercharger disclosed in Chinese Patent 201620645317.5. In theory, the more superchargers there are, the more stable the pressure output. However, in actual use, the more superchargers there are, the more severe the hysteresis is, as the pilot control, valve core, and piston switching all have a certain lag. When the number is too large, premature reversal or jamming may occur, which greatly affects the boosting effect and increases unnecessary costs. In the actual operation of the supercharger, sometimes all cylinders need to be fully operational, and sometimes only a portion of the cylinders need to be operational. If all cylinders in the cylinder group are always in full operation, it will cause unnecessary mechanical losses. Summary of the Invention

[0003] In view of the deficiencies in the prior art, the present invention provides a multi-cylinder ultra-high pressure automatic reciprocating supercharger provided with an internal circulation cylinder group.

[0004] The technical solution adopted by the present invention is: a multi-cylinder ultra-high pressure automatic reciprocating supercharger with an internal circulation cylinder group, including N bidirectional boosting cylinders and their respective matching reversing valves, N≥3, the boosting chamber of the boosting cylinder is provided with a control port, the boosting cylinders are arranged sequentially, that is, each boosting cylinder control port is connected to the pilot port of the reversing valve matched by the next boosting cylinder, and the Nth boosting cylinder is not provided with a control port. Among the N boosting cylinders, the first to Xth cylinders are arranged in sequence and cycle, and the Xth to Nth cylinders are arranged sequentially, that is, on the basis of the sequential setting of the boosting cylinders, the Xth cylinder boosting chamber is further provided with a second control port, and the second control port is connected to the pilot port of the reversing valve matched by the first boosting cylinder, 2≤X<N.

[0005] The multi-cylinder ultra-high pressure automatic reciprocating supercharger with an internal circulation cylinder group is characterized in that an on-off valve is provided at the control port of the X-th cylinder.

[0006] Based on the previous circulation cylinder group, the present invention sets up an internal circulation cylinder group, thereby splitting the original large circulation into small circulations, reducing the superposition of low hysteresis, and thus avoiding various problems caused by pilot reversing hysteresis, and the built-in circulation cylinder group can work independently, which can effectively reduce mechanical losses. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 This is a structural diagram of embodiment 1 of the present invention;

[0008] Figure 2 This is a structural diagram of embodiment 2 of the present invention;

[0009] Figure 3 This is a structural diagram of embodiment 3 of the present invention;

[0010] Figure 4 This is a schematic structural diagram of an N-cylinder embodiment of the present invention.

[0011] In the figure: 1-first booster cylinder, 11-first reversing valve, 12-left piston chamber, 13-right piston chamber, 14-left oil port, 15-right oil port, 16-left control port, 17-right control port, 18-second left control port, 19-second right control port, 2-second booster cylinder, 21-second reversing valve, 3-third booster cylinder, 31-third reversing valve, 4-fourth booster cylinder, 41-fourth reversing valve, 51-first one-way valve, 52-second one-way valve, 61-first hydraulically controlled one-way valve, 62-second hydraulically controlled one-way valve, 7-electromagnetic reversing valve. DETAILED DESCRIPTION

[0012] Example 1:

[0013] like Figure 1 As shown, a multi-cylinder ultra-high pressure automatic reciprocating supercharger with an internal circulation cylinder group includes a first boosting cylinder 1, a second boosting cylinder 2, and a third boosting cylinder 3. The boosting cylinders are provided with a left piston chamber 12 and a right piston chamber 13. The left piston chamber is provided with a left oil port 14 and a left control port 16. The right piston chamber 13 is provided with a right oil port 15 and a right control port 17. The left piston chamber of the second boosting cylinder is also provided with a second left control port 18 and a second right control port 19. The first boosting cylinder 1 is matched with a first reversing valve 11, the second boosting cylinder 2 is matched with a second reversing valve 21, the third boosting cylinder 3 is matched with a third reversing valve 31, and the fourth boosting cylinder is matched with a fourth reversing valve 41. The above-mentioned reversing valves are all hydraulically controlled reversing valves. The two oil inlets P of the first reversing valve are connected to the oil supply pipeline, and the T port is connected to the oil return pipeline. The two oil outlets are respectively connected to the left oil port 14 and the right oil port 15 of the first boosting cylinder.

[0014] The first reversing valve 11 matches the first one-way valve 51, the second one-way valve 52, the first hydraulically controlled one-way valve 61, and the second hydraulically controlled one-way valve 62. The first one-way valve 51 is arranged between the second left control port 18 of the second boosting cylinder 2 and the left pilot port of the first hydraulically controlled reversing valve 11, and the second one-way valve 52 is arranged between the second right control port 19 of the second boosting cylinder 2 and the right pilot port of the first hydraulically controlled reversing valve 11. The first hydraulically controlled reversing valve 61 is arranged between the left pilot port of the first reversing valve 11 and the oil drain line X, and the second hydraulically controlled reversing valve 62 is arranged between the right pilot port of the first reversing valve 11 and the oil drain line X. The pilot port of the first hydraulically controlled reversing valve 61 is connected to the second left control port 18 of the second boosting cylinder 2, and the pilot port of the second hydraulically controlled reversing valve 62 is connected to the second right control port 19 of the second boosting cylinder 2.

[0015] The two oil inlets P of the second reversing valve 21 are connected to the oil supply pipeline, the T port is connected to the oil return pipeline, and the two oil outlets are respectively connected to the left oil port 14 and the right oil port 15 of the second boosting cylinder 2. The second reversing valve 21 matches the first one-way valve 51, the second one-way valve 52, the first hydraulically controlled one-way valve 61, and the second hydraulically controlled one-way valve 62. The first one-way valve 51 is arranged between the left control port 16 of the first boosting cylinder 1 and the left pilot port of the second hydraulically controlled reversing valve 21, and the second one-way valve 52 is arranged between the right control port 17 of the first boosting cylinder 1 and the right pilot port of the second hydraulically controlled reversing valve 21. The first hydraulically controlled reversing valve 61 is arranged between the left pilot port of the second reversing valve 21 and the oil drain line X, and the second hydraulically controlled reversing valve 62 is arranged between the right pilot port of the second reversing valve 21 and the oil drain line X. The pilot port of the first hydraulically controlled reversing valve 61 is connected to the left control port 16 of the first boosting cylinder 1, and the pilot port of the second hydraulically controlled reversing valve 62 is connected to the right control port 17 of the first boosting cylinder 1.

[0016] The above structure enables the first and second boosting cylinders to achieve cyclic mutual control.

[0017] The connection method of the third reversing valve is the same as that of the second reversing valve.

[0018] When the booster is started, the pistons of each booster begin to move. When the first booster exposes one side control port, it drives the second hydraulically controlled reversing valve to reverse, and the movement direction of the second booster cylinder piston changes. When the second booster cylinder piston moves to expose one side control port, it drives the third hydraulically controlled reversing valve to reverse, and the movement direction of the third booster cylinder piston changes. When the second booster cylinder piston moves to expose the second control port on one side, it drives the first hydraulically controlled reversing valve to reverse, and the movement direction of the first booster cylinder piston changes.

[0019] Example 2:

[0020] like Figure 2As shown, a multi-cylinder ultra-high pressure automatic reciprocating supercharger with an internal circulation cylinder group includes a first boosting cylinder 1, a second boosting cylinder 2, a third boosting cylinder 3, and a fourth boosting cylinder 4. The boosting cylinders are provided with a left piston chamber 12 and a right piston chamber 13. The left piston chamber is provided with a left oil port 14 and a left control port 16. The right piston chamber 13 is provided with a right oil port 15 and a right control port 17. The left piston chamber of the second boosting cylinder is also provided with a second left control port 18 and a second right control port 19. The first boosting cylinder 1 is matched with a first reversing valve 11, the second boosting cylinder 2 is matched with a second reversing valve 21, the third boosting cylinder 3 is matched with a third reversing valve 31, and the fourth boosting cylinder is matched with a fourth reversing valve 41. The above-mentioned reversing valves are all hydraulically controlled reversing valves. The two oil inlets P of the first reversing valve are connected to the oil supply pipeline, and the T port is connected to the oil return pipeline. The two oil outlets are respectively connected to the left oil port 14 and the right oil port 15 of the first boosting cylinder.

[0021] The first reversing valve 11 matches the first one-way valve 51, the second one-way valve 52, the first hydraulically controlled one-way valve 61, and the second hydraulically controlled one-way valve 62. The first one-way valve 51 is arranged between the second left control port 18 of the second boosting cylinder 2 and the left pilot port of the first hydraulically controlled reversing valve 11, and the second one-way valve 52 is arranged between the second right control port 19 of the second boosting cylinder 2 and the right pilot port of the first hydraulically controlled reversing valve 11. The first hydraulically controlled reversing valve 61 is arranged between the left pilot port of the first reversing valve 11 and the oil drain line X, and the second hydraulically controlled reversing valve 62 is arranged between the right pilot port of the first reversing valve 11 and the oil drain line X. The pilot port of the first hydraulically controlled reversing valve 61 is connected to the second left control port 18 of the second boosting cylinder 2, and the pilot port of the second hydraulically controlled reversing valve 62 is connected to the second right control port 19 of the second boosting cylinder 2.

[0022] The two oil inlets P of the second reversing valve 21 are connected to the oil supply pipeline, the T port is connected to the oil return pipeline, and the two oil outlets are respectively connected to the left oil port 14 and the right oil port 15 of the second boosting cylinder 2. The second reversing valve 21 matches the first one-way valve 51, the second one-way valve 52, the first hydraulically controlled one-way valve 61, and the second hydraulically controlled one-way valve 62. The first one-way valve 51 is arranged between the left control port 16 of the first boosting cylinder 1 and the left pilot port of the second hydraulically controlled reversing valve 21, and the second one-way valve 52 is arranged between the right control port 17 of the first boosting cylinder 1 and the right pilot port of the second hydraulically controlled reversing valve 21. The first hydraulically controlled reversing valve 61 is arranged between the left pilot port of the second reversing valve 21 and the oil drain line X, and the second hydraulically controlled reversing valve 62 is arranged between the right pilot port of the second reversing valve 21 and the oil drain line X. The pilot port of the first hydraulically controlled reversing valve 61 is connected to the left control port 16 of the first boosting cylinder 1, and the pilot port of the second hydraulically controlled reversing valve 62 is connected to the right control port 17 of the first boosting cylinder 1.

[0023] The above structure enables the first and second boosting cylinders to achieve cyclic mutual control.

[0024] The connection mode of the third and fourth reversing valves is the same as that of the second reversing valve.

[0025] When the booster is started, each booster piston starts to move. When the first booster exposes one side control port, it drives the second hydraulically controlled reversing valve to reverse, and the movement direction of the second booster cylinder piston changes. When the second booster cylinder piston moves to the point where the one side control port is exposed, it drives the third hydraulically controlled reversing valve to reverse, and the movement direction of the third booster cylinder piston changes. When the second booster cylinder piston moves to the point where the second control port is exposed, it drives the first hydraulically controlled reversing valve to reverse, and the movement direction of the first booster cylinder piston changes. When the third booster cylinder piston moves to the point where the one side control port is exposed, the fourth hydraulically controlled reversing valve reverses, and the movement direction of the fourth booster cylinder piston changes.

[0026] Example 3:

[0027] like Figure 3 As shown, a multi-cylinder ultra-high pressure automatic reciprocating booster with an internal circulation cylinder group includes a first boosting cylinder 1, a second boosting cylinder 2, a third boosting cylinder 3, and a fourth boosting cylinder 4. The boosting cylinders are provided with a left piston chamber 12 and a right piston chamber 13. The left piston chamber is provided with a left oil port 14 and a left control port 16. The right piston chamber 13 is provided with a right oil port 15 and a right control port 17. The first boosting cylinder 1 is matched with a first reversing valve 11, the second boosting cylinder 2 is matched with a second reversing valve 21, the third boosting cylinder 3 is matched with a third reversing valve 31, and the fourth boosting cylinder is matched with a fourth reversing valve 41. The above-mentioned reversing valves are all hydraulically controlled reversing valves. The two oil inlets P of the first reversing valve are connected to the oil supply pipeline, and the T port is connected to the oil return pipeline. The two oil outlets are respectively connected to the left oil port 14 and the right oil port 15 of the first boosting cylinder.

[0028] The first reversing valve 11 matches the first one-way valve 51, the second one-way valve 52, the first hydraulically controlled one-way valve 61, and the second hydraulically controlled one-way valve 62. The first one-way valve 51 is arranged between the second left control port 18 of the third boosting cylinder 3 and the left pilot port of the first hydraulically controlled reversing valve 11, and the second one-way valve 52 is arranged between the second right control port 19 of the third boosting cylinder 3 and the right pilot port of the first hydraulically controlled reversing valve 11. The first hydraulically controlled reversing valve 61 is arranged between the left pilot port of the first reversing valve 11 and the oil drain line X, and the second hydraulically controlled reversing valve 62 is arranged between the right pilot port of the first reversing valve 11 and the oil drain line X. The pilot port of the first hydraulically controlled reversing valve 61 is connected to the second left control port 18 of the third boosting cylinder 3, and the pilot port of the second hydraulically controlled reversing valve 62 is connected to the second right control port 19 of the third boosting cylinder 3.

[0029] The two oil inlets P of the second reversing valve 21 are connected to the oil supply pipeline, the T port is connected to the oil return pipeline, and the two oil outlets are respectively connected to the left oil port 14 and the right oil port 15 of the second boosting cylinder 2. The second reversing valve 21 matches the first one-way valve 51, the second one-way valve 52, the first hydraulically controlled one-way valve 61, and the second hydraulically controlled one-way valve 62. The first one-way valve 51 is arranged between the left control port 16 of the first boosting cylinder 1 and the left pilot port of the second hydraulically controlled reversing valve 21, and the second one-way valve 52 is arranged between the right control port 17 of the first boosting cylinder 1 and the right pilot port of the second hydraulically controlled reversing valve 21. The first hydraulically controlled reversing valve 61 is arranged between the left pilot port of the second reversing valve 21 and the oil drain line X, and the second hydraulically controlled reversing valve 62 is arranged between the right pilot port of the second reversing valve 21 and the oil drain line X. The pilot port of the first hydraulically controlled reversing valve 61 is connected to the left control port 16 of the first boosting cylinder 1, and the pilot port of the second hydraulically controlled reversing valve 62 is connected to the right control port 17 of the first boosting cylinder 1.

[0030] The connection mode of the third and fourth reversing valves is the same as that of the second reversing valve, wherein the left and right control ports of the third reversing valve are provided with electromagnetic reversing valves 7.

[0031] The above structure enables the first, second and third boost cylinders to achieve cyclic mutual control.

[0032] When the booster is started, the pistons of each booster begin to move. When the first booster exposes one side control port, it drives the second hydraulically controlled reversing valve to reverse, and the movement direction of the second booster cylinder piston changes. When the second booster cylinder piston moves to the point where the one side control port is exposed, it drives the third hydraulically controlled reversing valve to reverse, and the movement direction of the third booster cylinder piston changes. When the third booster cylinder piston moves to the point where the one side control port is exposed, the fourth hydraulically controlled reversing valve reverses, and the movement direction of the fourth booster cylinder piston changes. When the third booster cylinder piston moves to the point where the second control port is exposed, it drives the first hydraulically controlled reversing valve to reverse, and the movement direction of the first booster cylinder piston changes.

[0033] When all the boost cylinders need to work, the electromagnet on the right side of the electromagnetic reversing valve 7 is energized, and the first, second, third and fourth boost cylinders all work. When all the boost cylinders do not need to work, the electromagnet on the left side of the electromagnetic reversing valve 7 is energized, and the first, second and third boost cylinders work in a cycle control, and the fourth boost cylinder does not work.

[0034] like Figure 4 As shown, the number of booster cylinders in the built-in circulating cylinder group and outside the circulating cylinder group of the present invention can be further increased and is not limited to the number in the above embodiment.

[0035] In the present invention, the oil port is arranged at the end of the boost chamber, and the positions of the left and right control ports and the second left and right control ports are determined according to the number of boost cylinders and the actual design.

Claims

1. A multi-cylinder ultra-high-pressure automatic reciprocating supercharger with an internal circulation cylinder group, comprising N bidirectional supercharging cylinders and respective matching reversing valves, N ≥ 3, wherein the supercharging chambers of the supercharging cylinders are provided with control ports, and the supercharging cylinders are arranged sequentially, i.e., the control port of each supercharging cylinder is connected to the pilot port of the matching reversing valve of the next supercharging cylinder, and the Nth supercharging cylinder is not provided with a control port, characterized in that: Among the N boosting cylinders, the first to X-th cylinders are arranged in a sequential cycle, and the X-th to N-th cylinders are arranged sequentially, that is, on the basis of the sequential arrangement of the boosting cylinders, the boosting chamber of the X-th cylinder is further provided with a second control port, and the second control port is connected to the pilot port of the reversing valve matched with the first boosting cylinder, 2≤X<N; an electromagnetic reversing valve is provided at the control port of the X-th cylinder.

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