Reciprocating supercharger

Abstract

The invention relates to the technical field of hydraulic equipment, in particular to a reciprocating supercharger, and solves the problem that the end part of an oil cylinder is impacted when a piston reverses in the prior art. Comprising a pressurizing oil cylinder, a pressurizing piston is arranged in the pressurizing oil cylinder, a low-pressure oil cavity, a damping cavity and a high-pressure oil cavity are formed in the pressurizing oil cylinder, the damping cavity is formed between the low-pressure oil cavity and the high-pressure oil cavity, and the low-pressure oil cavity, the damping cavity and the high-pressure oil cavity are coaxially arranged; a high-pressure plunger is arranged on the damping piston, the low-pressure piston is in sliding sealing fit with the low-pressure oil cavity, the high-pressure plunger is in sliding sealing fit with the high-pressure oil cavity, and the damping piston is in clearance fit with the damping cavity; the exterior of the pressurizing oil cylinder communicates with a reversing oil way. The damping device has the advantages that when the pressurizing piston is close to the end of the pressurizing oil cylinder, the damping cavity is matched with the damping piston, reversing impact of the pressurizing piston is reduced, and hard collision between the pressurizing piston and the end of the pressurizing oil cylinder is prevented.

Description

Technical Field

[0001] The invention relates to the technical field of hydraulic equipment, in particular to a reciprocating supercharger. Background Art

[0002] A hydraulic booster is an ultra-high pressure hydraulic component that amplifies hydraulic pressure by using the principle that the acting areas at both ends of the piston are different but the forces are the same. A hydraulic booster can increase the low pressure to 200MPa and above. Hydraulic boosters can be divided into three types: single-acting single-stroke boosters, single-acting reciprocating boosters, and double-acting reciprocating boosters. Single-acting single-stroke boosters can only move in one direction, are limited by stroke, have limited output flow, cannot achieve continuous boosting, and have a narrow range of applications; single-acting reciprocating boosters can achieve continuous boosting, but they can only boost in one direction, the oil source utilization rate is only one-half, and the output flow is also limited; double-acting reciprocating hydraulic boosters can achieve two-way continuous boosting, are not limited by stroke, have a large output flow, and are more ideal boosting components.

[0003] The patent with publication number CN114412847A in the prior art discloses a hydraulically controlled reciprocating supercharger, including a hydraulically controlled reversing control mechanism and a hydraulically controlled reversing slide valve, which can ensure that the valve core of the hydraulically controlled reversing valve of the reciprocating supercharger system is in a certain position, that is, when the hydraulically controlled reversing valve control component controls the oil supply of oil port a and b is connected to the oil tank, the valve core moves to the right, and the corresponding oil supply channel is connected at this time, ensuring that the right control oil port y of the hydraulically controlled reversing valve is connected to the control oil, and the left control oil port x is connected to the oil tank, the right function works, and the piston assembly moves to the right; the uninterrupted supply of the control oil circuit is achieved, and it can be ensured that under this stroke, the valve core position of the hydraulically controlled reversing slide valve is fixed, ensuring that the reciprocating supercharger piston moves to the right; when it moves to the left extreme position, the above action is repeated to ensure that the movement direction of the supercharger piston is smoothly switched and moves to the right, and such a reciprocating cycle is repeated to realize the hydraulically controlled reciprocating motion of the supercharger and ensure the system pressurization.

[0004] The above-mentioned hydraulic booster can control the bidirectional boosting of the booster through the hydraulic oil circuit. However, when the booster is boosting, the booster piston moves left and right, the piston will produce a large reversing impact, and when the piston moves to the end of the cylinder, it is easy to produce a hard impact on the end flange of the cylinder, affecting the safety of the use of the booster. Summary of the invention

[0005] The present invention provides a reciprocating supercharger, which solves the problem in the prior art that the piston has a large reversing impact and the piston may collide with the cylinder end flange.

[0006] The technical solution of the present invention is achieved in this way: A reciprocating supercharger includes a supercharging cylinder, a supercharging piston is provided in the supercharging cylinder, a low-pressure oil chamber, a damping chamber and a high-pressure oil chamber are provided in the supercharging cylinder, the damping chamber is arranged between the low-pressure oil chamber and the high-pressure oil chamber, the low-pressure oil chamber, the damping chamber and the high-pressure oil chamber are arranged coaxially, the supercharging piston includes a low-pressure piston, a damping piston is provided on the low-pressure piston, a high-pressure plunger is provided on the damping piston, the low-pressure piston and the low-pressure oil chamber are slidingly sealed, the high-pressure plunger and the high-pressure oil chamber are slidingly sealed, and the damping piston and the damping chamber are gap-matched; the supercharging cylinder is externally connected with a reversing oil circuit. When the damping piston enters the damping chamber, due to the gap between the damping piston and the damping chamber, it is convenient for the damping piston to enter the damping chamber. At the same time, the cooperation between the damping piston and the damping chamber will squeeze the hydraulic oil in the damping chamber, increase the moving resistance of the supercharging piston, and then greatly reduce the reversing impact of the piston, effectively avoid the piston from hitting the end flange of the cylinder, and ensure the safety of the supercharger.

[0007] The diameter of the low-pressure oil chamber is larger than the diameter of the damping chamber, which is larger than the diameter of the high-pressure oil chamber. The function of the damping chamber also includes, when it generates pressure after being compressed, transmitting the pressure through the damping chamber pipeline to the pressure relay or the pilot hydraulic reversing valve, pushing the pressure relay or the pilot hydraulic reversing valve to perform the next action, and this pressure value should not be too high or too low. Too high pressure may cause the pressure relay or the pilot hydraulic reversing valve to be subjected to excessive pressure shock, causing damage. If the pressure is too low, it is impossible to form a pressure difference with the damping chamber pipeline on the other side, causing the pressure relay or the pilot hydraulic reversing valve to be unable to send signals or drive normally. According to theoretical calculations, the cross-sectional area ratio of the low-pressure oil chamber to the damping chamber is optimally between 1.5 and 2.5.

[0008] The length of the damping chamber and the damping piston is less than the distance the damping piston moves. The distance the damping piston moves is the distance the booster piston moves; the booster piston is not affected by the damping chamber when it just changes direction, and can change direction normally; when the booster piston moves to a position close to the end of the booster cylinder, the damping piston cooperates with the damping chamber to reduce the moving speed of the booster piston in advance, ensuring that the booster piston will not collide with the end of the booster cylinder, avoiding the problem of excessive resistance and excessive braking distance of the booster piston during normal reversal movement.

[0009] The damping chamber includes a right hydraulic damping chamber and a left hydraulic damping chamber, and the right hydraulic damping chamber and the left hydraulic damping chamber are respectively arranged on both sides of the low-pressure oil chamber; the high-pressure oil chamber includes a right high-pressure oil chamber and a left high-pressure oil chamber, and the right high-pressure oil chamber is arranged on the right side of the right hydraulic damping chamber, and the left high-pressure oil chamber is arranged on the left side of the left hydraulic damping chamber; the low-pressure oil chamber, the right hydraulic damping chamber, the left hydraulic damping chamber, the right high-pressure oil chamber and the left high-pressure oil chamber are all connected to the electric control reversing oil circuit or the hydraulic control reversing oil circuit. Damping chambers and high-pressure oil chambers are arranged on both sides of the low-pressure oil chamber, and high-pressure oil can be output when the booster piston moves to the left or to the right, so as to realize two-way continuous boosting, have a large output flow rate, and improve the output efficiency of high-pressure oil.

[0010] The reversing oil circuit includes a low-pressure pipeline, a high-pressure pipeline and a control pipeline. The low-pressure pipeline is connected with the low-pressure oil chamber, the damping chamber and the high-pressure oil chamber. The input end of the high-pressure pipeline is connected with the high-pressure oil chamber. The control pipeline is connected with the damping chamber. The low-pressure pipeline is provided with an electric control reversing component or a hydraulic control reversing component. The low-pressure pipeline supplies oil to the low-pressure oil chamber, the damping chamber and the high-pressure oil chamber. The hydraulic oil in the low-pressure oil chamber pushes the booster piston to move left and right. During the movement, the booster piston pressurizes the hydraulic oil in the high-pressure oil chamber, and then the pressurized hydraulic oil is discharged from the booster through the high-pressure pipeline. After the booster piston moves to the end, the pressure in the damping chamber increases, and an obvious reversing signal is provided through the control pipeline to improve the accuracy of the booster.

[0011] The electric control reversing assembly includes a main electromagnetic reversing valve, a low-pressure pipeline includes a low-pressure oil chamber pipeline, a damping chamber pipeline and a high-pressure oil chamber pipeline, an input end of the main electromagnetic reversing valve is connected with a driving oil pump, an output end of the main electromagnetic reversing valve is connected with the low-pressure oil chamber pipeline, the damping chamber pipeline and the high-pressure oil chamber pipeline, the low-pressure oil chamber pipeline is connected with the low-pressure oil chamber, the damping chamber and the high-pressure oil chamber pipeline at the same time, the damping chamber pipeline is connected with the damping chamber, and the high-pressure oil chamber pipeline is connected with the high-pressure oil chamber. The driving oil pump delivers the low-pressure oil in the oil tank to the main electromagnetic reversing valve, and then supplies oil to the low-pressure oil chamber, the damping chamber pipeline and the high-pressure oil chamber pipeline on the same side at the same time; at this time, the oil in the low-pressure oil chamber on the other side flows back to the oil tank through the main electromagnetic reversing valve, the high-pressure oil chamber on the other side outputs high-pressure oil through the high-pressure pipeline, and the oil in the damping chamber on the other side enters the control pipeline to send a reversing signal.

[0012] The control pipeline includes a right pressure relay and a left pressure relay. The right pressure relay is connected to the right hydraulic damping chamber through the control pipeline, and the left pressure relay is connected to the left hydraulic damping chamber through the control pipeline. The right pressure relay and the left pressure relay are electrically connected to the main electromagnetic reversing valve at the same time. When the booster piston moves to the end of the booster oil cylinder, the pressure in the damping chamber increases. When the pressure value in the damping chamber is greater than the set pressure value of the left pressure relay or the right pressure relay, the left pressure relay and the right pressure relay output a reversing signal to control the reversing of the main electromagnetic reversing valve, change the moving direction of the booster piston, and change the flow direction of the oil in the low-pressure oil circuit.

[0013] The hydraulic control reversing assembly includes a main hydraulic reversing valve, a low-pressure pipeline includes a low-pressure oil chamber pipeline, a damping chamber pipeline and a high-pressure oil chamber pipeline, an input end of the main hydraulic reversing valve is connected with a driving oil pump, an output end of the main hydraulic reversing valve is connected with the low-pressure oil chamber pipeline, the damping chamber pipeline and the high-pressure oil chamber pipeline, the low-pressure oil chamber pipeline is simultaneously connected with the low-pressure oil chamber, the damping chamber and the high-pressure oil chamber, the damping chamber pipeline is connected with the damping chamber, and the high-pressure oil chamber pipeline is connected with the high-pressure oil chamber. The driving oil pump delivers the low-pressure oil in the oil tank to the main hydraulic reversing valve, and then supplies oil to the low-pressure oil chamber, the damping chamber pipeline and the high-pressure oil chamber pipeline on the same side at the same time; at this time, the oil in the low-pressure oil chamber on the other side flows back to the oil tank through the main hydraulic reversing valve, the high-pressure oil chamber on the other side outputs high-pressure oil through the high-pressure pipeline, and the oil in the damping chamber on the other side enters the control pipeline to send a reversing signal.

[0014] The control pipeline includes a pilot hydraulic reversing valve, which includes a pilot valve and a main valve. The pilot valve is connected to the right hydraulic damping chamber and the left hydraulic damping chamber through the control pipeline at the same time, and the main valve is connected to the main hydraulic reversing valve. When the booster piston moves to the end of the booster oil cylinder, the pressure in the damping chamber increases. At this time, the pilot valve controls the valve core of the main valve to move and reverse, and then guides the pressure oil to drive the main hydraulic reversing valve to change direction accordingly, change the moving direction of the booster piston, and then change the flow direction of the oil in the low-pressure oil circuit.

[0015] The damping chamber pipeline of the right hydraulic damping chamber is provided with a right damping chamber oil inlet check valve; the damping chamber pipeline of the left hydraulic damping chamber is provided with a left damping chamber oil inlet check valve. The right damping chamber oil inlet check valve and the left damping chamber oil inlet check valve control the flow direction of the oil in the damping chamber pipeline, that is, the oil can only be supplied to the damping chamber through the damping chamber pipeline, and the oil in the damping chamber is discharged through the control pipeline, and a reversing signal is given to achieve high-precision reversing of the reciprocating supercharger.

[0016] The beneficial effects of the present invention are as follows: 1. A damping chamber is arranged between the low-pressure oil chamber and the high-pressure oil chamber. When the boosting piston approaches the end of the boosting cylinder, the cooperation between the damping chamber and the damping piston facilitates the damping piston to enter the damping chamber. At the same time, the cooperation between the damping piston and the damping chamber squeezes the hydraulic oil in the damping chamber, thereby increasing the moving resistance of the boosting piston, so that the boosting piston has sufficient braking force and braking distance, reduces the reversing impact of the boosting piston, prevents the boosting piston from having a hard collision with the end of the boosting cylinder, and ensures the safety of the use of the supercharger.

[0017] 2. The length of the damping chamber and the damping piston is less than the distance the damping piston moves, ensuring that the booster piston is not affected by the damping chamber before it moves close to the end of the booster cylinder, and can move in reverse direction normally; when the booster piston moves to the end position of the booster cylinder, the damping chamber and the damping piston cooperate to generate resistance to the movement of the booster piston, reduce the moving speed of the booster piston, and avoid the problem of excessive resistance and excessive braking distance during the normal reversing movement of the booster piston.

[0018] 3. A one-way valve is installed on the damping pipeline so that the oil in the damping chamber is squeezed out and flows into the control pipeline, which serves as the hydraulic force of the reversing signal, improves the sensitivity of the reciprocating supercharger, and realizes high-precision repeated reversing of the reciprocating supercharger.

[0019] 4. The electric control reversing oil circuit or the hydraulic control reversing oil circuit is set outside the reciprocating supercharger, which avoids the adverse effects of high temperature and vibration generated by the movement of the reciprocating supercharger on the signal control components; in addition, the reversing oil circuit is set outside the reciprocating supercharger to easily replace the pressure relay and the pilot hydraulic reversing valve, so that the control type of the reversing oil circuit can be switched between the electric control reversing oil circuit and the hydraulic control reversing oil circuit to meet the working requirements under different scene conditions. When the reciprocating supercharger is installed with a pressure relay, it is an electric control reciprocating supercharger. When the reciprocating supercharger is installed with a pilot hydraulic reversing valve, it is a hydraulic control reciprocating supercharger. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a structural schematic diagram of a reciprocating supercharger of the present invention; Figure 2 It is a schematic diagram of the state where the damping piston of the electronically controlled reciprocating supercharger moves to the left and cooperates with the damping chamber; Figure 3This is a schematic diagram of the hydraulically controlled reciprocating supercharger with the booster piston starting to move right.

[0022] In the figure: 1. low-pressure piston, 2. right damping piston, 3. right high-pressure piston, 4. low-pressure oil chamber, 5. right hydraulic damping chamber, 6. right high-pressure oil chamber, 7. right high-pressure chamber oil outlet check valve, 8. right high-pressure chamber oil inlet check valve, 9. right damping chamber oil inlet check valve, 10. main solenoid reversing valve, 11. right pressure relay, 12. drive oil pump, 13. overflow valve, 14. left damping chamber oil inlet check valve, 15. left high-pressure chamber oil inlet check valve, 16. left high-pressure chamber oil outlet check valve, 17. left high-pressure oil chamber, 18. left high-pressure plunger, 19. left hydraulic damping chamber, 20. left damping piston, 21. total high-pressure oil outlet check valve, 22. left pressure relay; 23. pilot hydraulic reversing valve, 24. main hydraulic reversing valve. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] Embodiment 1, as Figure 1 As shown, a reciprocating supercharger comprises a boosting cylinder, a boosting piston is arranged in the boosting cylinder, a low-pressure oil chamber 4, a damping chamber and a high-pressure oil chamber are arranged in the boosting cylinder, the damping chamber is arranged between the low-pressure oil chamber 4 and the high-pressure oil chamber, the low-pressure oil chamber 4, the damping chamber and the high-pressure oil chamber are arranged coaxially, the boosting piston comprises a low-pressure piston 1, a damping piston is arranged on the low-pressure piston 1, a high-pressure plunger is arranged on the damping piston, the low-pressure piston 1 is in sliding seal cooperation with the low-pressure oil chamber 4, the high-pressure plunger is in sliding seal cooperation with the high-pressure oil chamber, and the damping piston is in clearance cooperation with the damping chamber; a reversing oil circuit is connected to the outside of the boosting cylinder. The external hydraulic oil enters the low-pressure oil chamber 4, the damping chamber and the high-pressure oil chamber through the electronically controlled reversing oil circuit or the hydraulically controlled reversing oil circuit. The hydraulic oil entering the low-pressure oil chamber 4 pushes the booster piston to move. The booster piston moves to pressurize the hydraulic oil in the high-pressure oil chamber, thereby realizing hydraulic oil pressurization. When the booster piston moves to a position close to the end of the booster cylinder and when the damping piston enters the damping chamber, due to the gap between the damping piston and the damping chamber, it is convenient for the damping piston to enter the damping chamber. At the same time, the cooperation between the damping piston and the damping chamber will squeeze the hydraulic oil in the damping chamber, increase the moving resistance of the booster piston, and thus greatly reduce the reversing impact of the booster piston, effectively avoiding the booster piston from hitting the end of the booster cylinder, and ensuring the safety of the use of the booster.

[0025] Furthermore, the diameter of the low-pressure oil chamber 4 is larger than the diameter of the damping chamber and larger than the diameter of the high-pressure oil chamber. The function of the damping chamber also includes, when it generates pressure after being compressed, transmitting the pressure through the damping chamber pipeline to the pressure relay or the pilot hydraulic reversing valve 23, thereby pushing the pressure relay or the pilot hydraulic reversing valve 23 to perform the next step. This pressure value should not be too high or too low. Too high pressure may cause the pressure relay or the pilot hydraulic reversing valve 23 to be subjected to excessive pressure shock, causing damage to it. If the pressure is too low, a pressure difference cannot be formed with the damping chamber pipeline on the other side, causing the pressure relay or the pilot hydraulic reversing valve 23 to be unable to send signals or drive normally. According to theoretical calculations, the cross-sectional area ratio of the low-pressure oil chamber to the damping chamber is optimally between 1.5 and 2.5.

[0026] Furthermore, the length of the damping chamber and the damping piston is less than the distance the damping piston moves. During the use of the supercharger, the moving distance of the damping piston is the moving distance of the booster piston; so that the booster piston is not affected by the damping chamber when it just changes direction and can change direction normally; specifically, when the booster piston moves to a position close to the end of the booster oil cylinder, the damping piston cooperates with the damping chamber to reduce the moving speed of the booster piston in advance, ensuring that the booster piston will not hit the end of the booster oil cylinder, avoiding the problem of excessive resistance and excessive braking distance of the booster piston during normal reversal movement; when the booster piston moves away from the end of the booster oil cylinder, the damping piston separates from the damping chamber, and at this time the damping chamber is completely connected with the low-pressure oil chamber 4, and the booster piston can move at a normal speed.

[0027] Furthermore, the damping chamber includes a right hydraulic damping chamber 5 and a left hydraulic damping chamber 19, which are respectively arranged on both sides of the low-pressure oil chamber 4; the high-pressure oil chamber includes a right high-pressure oil chamber 6 and a left high-pressure oil chamber 17, which is arranged on the right side of the right hydraulic damping chamber 5 and the left high-pressure oil chamber 17 on the left side of the left hydraulic damping chamber 19; the low-pressure oil chamber 4, the right hydraulic damping chamber 5, the left hydraulic damping chamber 19, the right high-pressure oil chamber 6 and the left high-pressure oil chamber 17 are all connected to the reversing oil circuit. Damping chambers and high-pressure oil chambers are arranged on both sides of the low-pressure oil chamber 4, and high-pressure oil can be output when the booster piston moves to the left or right, so as to realize bidirectional continuous boosting of the booster, with a large output flow rate and improved output efficiency of the high-pressure oil.

[0028] Embodiment 2, based on embodiment 1, a reciprocating supercharger, the reversing oil circuit is an electronically controlled reversing oil circuit, the electronically controlled reversing oil circuit includes a low-pressure pipeline, a high-pressure pipeline and a control pipeline, the low-pressure pipeline is connected with the low-pressure oil chamber 4, the damping chamber and the high-pressure oil chamber, the input end of the high-pressure pipeline is connected with the high-pressure oil chamber, the control pipeline is connected with the damping chamber, and an electronically controlled reversing assembly is arranged on the low-pressure pipeline. The low-pressure pipeline supplies oil to the low-pressure oil chamber 4, the damping chamber and the high-pressure oil chamber, the hydraulic oil in the low-pressure oil chamber 4 pushes the booster piston to move left and right, and during the movement, the booster piston pressurizes the hydraulic oil in the high-pressure oil chamber, and then the pressurized hydraulic oil is discharged from the supercharger through the high-pressure pipeline; after the booster piston moves to the end, the pressure in the damping chamber increases, and an obvious reversing signal is provided through the control pipeline, thereby improving the accuracy of the supercharger. Specifically, the low-pressure oil chamber 4, the right hydraulic damping chamber 5, the left hydraulic damping chamber 19, the right high-pressure oil chamber 6 and the left high-pressure oil chamber 17 are connected to the low-pressure pipeline at the same time, and the electronically controlled reversing assembly controls the flow direction of the hydraulic oil in the low-pressure pipeline to achieve two-way pressurization of the booster piston; the right high-pressure oil chamber 6 and the left high-pressure oil chamber 17 are both connected to the high-pressure pipeline, and the right hydraulic damping chamber 5 and the left hydraulic damping chamber 19 are both connected to the control pipeline.

[0029] Further, if Figure 2 As shown, the electric control reversing assembly includes a main electromagnetic reversing valve 10, and the low-pressure pipeline includes a low-pressure oil chamber pipeline, a damping chamber pipeline and a high-pressure oil chamber pipeline. The input end of the main electromagnetic reversing valve 10 is connected with a driving oil pump 12, and the output end of the main electromagnetic reversing valve 10 is connected with the low-pressure oil chamber pipeline, the damping chamber pipeline and the high-pressure oil chamber pipeline. The low-pressure oil chamber pipeline is simultaneously connected with the low-pressure oil chamber 4, the damping chamber and the high-pressure oil chamber, the damping chamber pipeline is connected with the damping chamber, and the high-pressure oil chamber pipeline is connected with the high-pressure oil chamber. The driving oil pump 12 delivers the hydraulic oil in the oil tank to the main electromagnetic reversing valve 10, and then supplies oil to the low-pressure oil chamber 4, the damping chamber and the high-pressure oil chamber on the same side through the low-pressure oil chamber pipeline, the damping chamber pipeline and the high-pressure oil chamber pipeline; at this time, the hydraulic oil in the low-pressure oil chamber 3 on the other side flows back to the oil tank through the main electromagnetic reversing valve 10, and the high-pressure oil chamber on the other side outputs high-pressure oil through the high-pressure pipeline, and the oil in the damping chamber on the other side enters the control pipeline to send a reversing signal.

[0030] In addition, a one-way valve is provided at the connection position between the low-pressure oil chamber pipeline and the high-pressure oil chamber. Specifically, a right high-pressure chamber oil inlet one-way valve 8 is provided at the input end of the right high-pressure oil chamber 6, and a left high-pressure chamber oil inlet one-way valve 15 is provided at the input end of the left high-pressure oil chamber 17; an overflow valve 13 is provided between the driving oil pump 12 and the main electromagnetic reversing valve 10, and the overflow valve 13 is used to protect the safe use of the driving oil pump 12.

[0031] Further, the control pipeline includes a right pressure relay 11 and a left pressure relay 22. The right pressure relay 11 is connected to the right hydraulic damping chamber 5 through the control pipeline, and the left pressure relay 22 is connected to the left hydraulic damping chamber 19 through the control pipeline. The right pressure relay 11 and the left pressure relay 22 are electrically connected to the main electromagnetic reversing valve 10 at the same time. When the booster piston moves to the end of the booster cylinder, the pressure in the damping chamber increases. When the pressure value in the damping chamber is greater than the set pressure value of the left pressure relay 22 or the right pressure relay 11, the left pressure relay 22 and the right pressure relay 11 output a reversing signal to control the reversing of the main electromagnetic reversing valve 10, change the moving direction of the booster piston, and change the flow direction of the hydraulic oil in the low-pressure oil circuit.

[0032] Furthermore, the input end of the high-pressure pipeline is connected to the right high-pressure oil chamber 6 and the left high-pressure oil chamber 17 at the same time, and the output end of the right high-pressure oil chamber 6 is provided with a right high-pressure chamber oil outlet check valve 7, the output end of the left high-pressure oil chamber 17 is provided with a left high-pressure chamber oil outlet check valve 16, and the output end of the high-pressure pipeline is provided with a total high-pressure oil outlet check valve 21. The hydraulic oil pressurized by the right high-pressure oil chamber 6 and the left high-pressure oil chamber 17 is gathered through the high-pressure pipeline and output in one direction through the total high-pressure oil outlet check valve 21.

[0033] Furthermore, a right damping chamber oil inlet check valve 9 is provided on the damping chamber pipeline of the right hydraulic damping chamber 5; and a left damping chamber oil inlet check valve 14 is provided on the damping chamber pipeline of the left hydraulic damping chamber 19. The right damping chamber oil inlet check valve 9 and the left damping chamber oil inlet check valve 14 control the flow direction of the hydraulic oil in the damping chamber pipeline, that is, oil can only be supplied to the damping chamber through the damping chamber pipeline, and the oil in the damping chamber is discharged through the control pipeline when it is discharged, and a reversing signal is given to achieve high-precision reversing of the reciprocating supercharger.

[0034] like Figure 2 As shown in the figure, the working principle of the electronically controlled reciprocating supercharger during reversing: The boost piston moves leftward to increase pressure. When the left damping piston 20 on the left side of the low-pressure piston 1 moves into the port of the left hydraulic damping chamber 19, the hydraulic oil in the left hydraulic damping chamber 19 is sealed in the chamber by the damping piston 20 and the one-way valve 14, and a damping pressure Pk is generated.

[0035] The Pk pressure oil enters the pressure detection inlet of the left pressure relay 22 through the control pipeline. When the pressure Pk value is greater than the set pressure threshold value of the left pressure relay 22, the XK1 contact closes the loop and sends a switch signal.

[0036] After receiving the switch signal from XK1, the electronic control system turns off the power to reset the electromagnetic reversing valve 10. The driving pressure oil PL is converted from the P port to the B port to the P port to the A port, and the return oil Po is converted from the A port to the T port to the B port to the T port. The pressure oil PL is transferred to the left cylinder of the low-pressure piston 1 to drive the low-pressure piston 1 to move right.

[0037] The low-pressure piston 1 drives the right high-pressure plunger 3 to move rightward, and the hydraulic oil is pressurized in the right high-pressure oil chamber 6. Then, the pressurized hydraulic oil enters the high-pressure system through the right high-pressure chamber oil outlet check valve 7 and the total high-pressure oil outlet check valve 21. At this time, the inlet pressure of the right pressure relay 11 drops to Po.

[0038] Similarly, when the right damping piston 2 moves rightward synchronously into the right hydraulic damping chamber 5, oil pressure PK is generated, driving the right pressure relay 11 to operate, XK2 sends a reversing signal to the electronic control system, so that the electromagnetic reversing valve 10 is powered and reversed, driving the low-pressure piston 1 to reverse and return.

[0039] Whenever the low-pressure piston 1 moves to the end of the cylinder, the corresponding damping chamber produces high-pressure oil PK to drive the pressure relay to send a signal, controlling the low-pressure piston 1 to automatically reciprocate and pressurize.

[0040] Embodiment 3, based on embodiment 1, a reciprocating supercharger, the reversing oil circuit is a hydraulically controlled reversing oil circuit, the hydraulically controlled reversing oil circuit includes a low-pressure pipeline, a high-pressure pipeline and a control pipeline, the low-pressure pipeline is connected with the low-pressure oil chamber 4, the damping chamber and the high-pressure oil chamber, the input end of the high-pressure pipeline is connected with the high-pressure oil chamber, the control pipeline is connected with the damping chamber, and a hydraulically controlled reversing assembly is arranged on the low-pressure pipeline. The low-pressure pipeline supplies oil to the low-pressure oil chamber 4, the damping chamber and the high-pressure oil chamber, the hydraulic oil in the low-pressure oil chamber 4 pushes the booster piston to move left and right, and during the movement, the booster piston pressurizes the hydraulic oil in the high-pressure oil chamber, and then the pressurized hydraulic oil is discharged from the supercharger through the high-pressure pipeline; after the booster piston moves to the end, the pressure in the damping chamber increases, and an obvious reversing signal is provided through the control pipeline, thereby improving the accuracy of the supercharger. Specifically, the low-pressure oil chamber 4, the right hydraulic damping chamber 5, the left hydraulic damping chamber 19, the right high-pressure oil chamber 6 and the left high-pressure oil chamber 17 are connected to the low-pressure pipeline at the same time, and the hydraulically controlled reversing assembly controls the flow direction of the hydraulic oil in the low-pressure pipeline to achieve two-way pressurization of the booster piston; the right high-pressure oil chamber 6 and the left high-pressure oil chamber 17 are both connected to the high-pressure pipeline, and the right hydraulic damping chamber 5 and the left hydraulic damping chamber 19 are both connected to the control pipeline.

[0041] Further, if Figure 3As shown, the hydraulically controlled reversing assembly includes a main hydraulic reversing valve 24, the low-pressure pipeline includes a low-pressure oil chamber pipeline, a damping chamber pipeline and a high-pressure oil chamber pipeline, the input end of the main hydraulic reversing valve 24 is connected to the driving oil pump 12, the output end of the main hydraulic reversing valve 24 is connected to the low-pressure oil chamber pipeline, the damping chamber pipeline and the high-pressure oil chamber pipeline, the low-pressure oil chamber pipeline is simultaneously connected to the low-pressure oil chamber 4, the damping chamber and the high-pressure oil chamber, the damping chamber pipeline is connected to the damping chamber, and the high-pressure oil chamber pipeline is connected to the high-pressure oil chamber. The driving oil pump 12 delivers the hydraulic oil in the oil tank to the main hydraulic reversing valve 24, and then supplies oil to the low-pressure oil chamber 4, the damping chamber and the high-pressure oil chamber on the same side through the low-pressure oil chamber pipeline, the damping chamber pipeline and the high-pressure oil chamber pipeline at the same time; at this time, the hydraulic oil in the low-pressure oil chamber 3 on the other side flows back to the oil tank through the main hydraulic reversing valve 24, the high-pressure oil chamber on the other side outputs high-pressure oil through the high-pressure pipeline, and the oil in the damping chamber on the other side enters the control pipeline to send a reversing signal.

[0042] In addition, a one-way valve is provided at the connection position between the low-pressure oil chamber pipeline and the high-pressure oil chamber. Specifically, a right high-pressure chamber oil inlet one-way valve 8 is provided at the input end of the right high-pressure oil chamber 6, and a left high-pressure chamber oil inlet one-way valve 15 is provided at the input end of the left high-pressure oil chamber 17; an overflow valve 13 is provided between the driving oil pump 12 and the main hydraulic reversing valve 24, and the overflow valve 13 is used to protect the safe use of the driving oil pump 12.

[0043] Further, the control pipeline includes a pilot hydraulic reversing valve 23, which includes a pilot valve and a main valve. The pilot valve is connected to the right hydraulic damping chamber 5 and the left hydraulic damping chamber 19 through the control pipeline at the same time, and the main valve is connected to the main hydraulic reversing valve 24. Specifically, the right hydraulic damping chamber 5 is connected to the KP port of the pilot hydraulic reversing valve 23, and the left hydraulic damping chamber 19 is connected to the KL port of the pilot hydraulic reversing valve 23. When the booster piston moves to the end of the booster oil cylinder, the pressure in the damping chamber increases. At this time, the pilot valve controls the valve core of the main valve to move and reverse, thereby guiding the hydraulic oil to drive the main hydraulic reversing valve 24 to change direction accordingly, changing the moving direction of the booster piston, and then changing the flow direction of the oil in the low-pressure oil circuit.

[0044] Furthermore, a right damping chamber oil inlet check valve 9 is provided on the damping chamber pipeline of the right hydraulic damping chamber 5; and a left damping chamber oil inlet check valve 14 is provided on the damping chamber pipeline of the left hydraulic damping chamber 19. The right damping chamber oil inlet check valve 9 and the left damping chamber oil inlet check valve 14 control the flow direction of the hydraulic oil in the damping chamber pipeline, that is, oil can only be supplied to the damping chamber through the damping chamber pipeline, and the oil in the damping chamber is discharged through the control pipeline when it is discharged, and a reversing signal is given to achieve high-precision reversing of the reciprocating supercharger.

[0045] like Figure 3 As shown in the figure, the working principle of the hydraulic reciprocating supercharger during reversing: The boost piston moves leftward to increase pressure. When the left damping piston 20 on the left side of the low-pressure piston 1 moves into the port of the left hydraulic damping chamber 19, the hydraulic oil in the left hydraulic damping chamber 19 is sealed in the chamber by the damping piston 20 and the one-way valve 14, and damping pressure is generated.

[0046] The damping pressure oil enters the KL port of the pilot hydraulic reversing valve 23 through the control pipeline. When the damping pressure value is greater than the pilot valve pressure of the pilot hydraulic reversing valve 23, the main valve spool of the pilot hydraulic reversing valve 23 moves and changes direction, thereby driving the main hydraulic reversing valve 24 to change direction. The driving pressure oil is converted from the P port to the B port to the P port to the A port, and the return oil is converted from the A port to the T port to the B port to the T port. The pressure oil is transferred to the left cylinder of the low-pressure piston 1 to drive the low-pressure piston 1 to move right.

[0047] The low-pressure piston 1 drives the right high-pressure plunger 3 to move rightward, and the hydraulic oil is pressurized in the right high-pressure oil chamber 6. Then, the pressurized hydraulic oil enters the high-pressure system through the right high-pressure chamber oil outlet check valve 7 and the total high-pressure oil outlet check valve 21. At this time, the inlet pressure of the right pressure relay 11 drops to Po.

[0048] Similarly, when the right damping piston 2 moves rightward synchronously and enters the right hydraulic damping chamber 5, oil pressure is generated, driving the pilot hydraulic reversing valve 23 to operate, and the pilot hydraulic reversing valve 23 drives the main hydraulic reversing valve 24 to reverse, driving the low-pressure piston 1 to reverse and return.

[0049] Whenever the low-pressure piston 1 moves to the end of the oil cylinder, the corresponding damping chamber generates high-pressure oil to drive the pilot hydraulic reversing valve 23 to send a signal to control the automatic reciprocating motion of the low-pressure piston 1 to increase the pressure.

[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A reciprocating supercharger, comprising a supercharging cylinder, a supercharging piston being arranged in the supercharging cylinder, characterized in that: A low-pressure oil chamber (4), a damping chamber and a high-pressure oil chamber are provided in the booster oil cylinder. The damping chamber is provided between the low-pressure oil chamber (4) and the high-pressure oil chamber. The low-pressure oil chamber (4), the damping chamber and the high-pressure oil chamber are arranged coaxially. The booster piston comprises a low-pressure piston (1). A damping piston is provided on the low-pressure piston (1). A high-pressure plunger is provided on the damping piston. The low-pressure piston (1) is in sliding seal cooperation with the low-pressure oil chamber (4). The high-pressure plunger is in sliding seal cooperation with the high-pressure oil chamber. The damping piston is in clearance cooperation with the damping chamber. A reversing oil circuit is connected to the outside of the booster oil cylinder.

2. The reciprocating supercharger according to claim 1, characterized in that: The diameter of the low-pressure oil chamber (4) is larger than the diameter of the damping chamber and larger than the diameter of the high-pressure oil chamber.

3. The reciprocating supercharger according to claim 1 or 2, characterized in that: The length of the damping chamber and the damping piston is smaller than the distance the damping piston moves.

4. The reciprocating supercharger according to claim 3, characterized in that: The damping chamber comprises a right hydraulic damping chamber (5) and a left hydraulic damping chamber (19), and the right hydraulic damping chamber (5) and the left hydraulic damping chamber (19) are respectively arranged on both sides of the low-pressure oil chamber (4); the high-pressure oil chamber comprises a right high-pressure oil chamber (6) and a left high-pressure oil chamber (17), and the right high-pressure oil chamber (6) is arranged on the right side of the right hydraulic damping chamber (5), and the left high-pressure oil chamber (17) is arranged on the left side of the left hydraulic damping chamber (19); the low-pressure oil chamber (4), the right hydraulic damping chamber (5), the left hydraulic damping chamber (19), the right high-pressure oil chamber (6) and the left high-pressure oil chamber (17) are all connected to the reversing oil circuit.

5. The reciprocating supercharger according to claim 1 or 4, characterized in that: The reversing oil circuit comprises a low-pressure pipeline, a high-pressure pipeline and a control pipeline. The low-pressure pipeline is connected to the low-pressure oil chamber (4), the damping chamber and the high-pressure oil chamber. The input end of the high-pressure pipeline is connected to the high-pressure oil chamber. The control pipeline is connected to the damping chamber. The low-pressure pipeline is provided with an electric control reversing component or a hydraulic control reversing component.

6. The reciprocating supercharger according to claim 5, characterized in that: The electric control reversing assembly comprises a main electromagnetic reversing valve (10); the low-pressure pipeline comprises a low-pressure oil chamber pipeline, a damping chamber pipeline and a high-pressure oil chamber pipeline; the input end of the main electromagnetic reversing valve (10) is connected to a driving oil pump (12); the output end of the main electromagnetic reversing valve (10) is connected to the low-pressure oil chamber pipeline, the damping chamber pipeline and the high-pressure oil chamber pipeline; the low-pressure oil chamber pipeline is simultaneously connected to the low-pressure oil chamber (4), the damping chamber and the high-pressure oil chamber; the damping chamber pipeline is connected to the damping chamber; and the high-pressure oil chamber pipeline is connected to the high-pressure oil chamber.

7. The reciprocating supercharger according to claim 6, characterized in that: The control pipeline comprises a right pressure relay (11) and a left pressure relay (22); the right pressure relay (11) is connected to the right hydraulic damping chamber (5) through the control pipeline; the left pressure relay (22) is connected to the left hydraulic damping chamber (19) through the control pipeline; the right pressure relay (11) and the left pressure relay (22) are electrically connected to the main electromagnetic reversing valve (10) at the same time.

8. The reciprocating supercharger according to claim 5, characterized in that: The hydraulically controlled reversing assembly comprises a main hydraulic reversing valve (24); the low-pressure pipeline comprises a low-pressure oil chamber pipeline, a damping chamber pipeline and a high-pressure oil chamber pipeline; the input end of the main hydraulic reversing valve (24) is connected to a driving oil pump (12); the output end of the main hydraulic reversing valve (24) is connected to the low-pressure oil chamber pipeline, the damping chamber pipeline and the high-pressure oil chamber pipeline; the low-pressure oil chamber pipeline is simultaneously connected to the low-pressure oil chamber (4), the damping chamber and the high-pressure oil chamber; the damping chamber pipeline is connected to the damping chamber; and the high-pressure oil chamber pipeline is connected to the high-pressure oil chamber.

9. The reciprocating supercharger according to claim 8, characterized in that: The control pipeline comprises a pilot hydraulic reversing valve (23), which comprises a pilot valve and a main valve. The pilot valve is connected to the right hydraulic damping chamber (5) and the left hydraulic damping chamber (19) through the control pipeline, and the main valve is connected to the main hydraulic reversing valve (24).

10. The reciprocating supercharger according to any one of claims 6 to 9, characterized in that: A right damping chamber oil inlet check valve (9) is provided on the damping chamber pipeline of the right hydraulic damping chamber (5); and a left damping chamber oil inlet check valve (14) is provided on the damping chamber pipeline of the left hydraulic damping chamber (19).

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