A new type of hydraulic intensifier cylinder

Abstract

The utility model discloses a novel hydraulic pressure intensifier cylinder belongs to fluid pressure conversion equipment technical field, including main cylinder body, pressure intensifier cylinder body and inside piston rod, and the outlet end of pressure intensifier cylinder body is connected with main cylinder body, and piston rod includes piston main body and axle body, and the cross section area of piston main body is axle body cross section area's n times, and piston main body and main cylinder body inner wall slide fit, and axle body penetrates the outlet end of main cylinder body and with pressure intensifier cylinder body inner wall slide fit, and the oil liquid mouth on main cylinder body lateral wall is located between piston main body and pressure intensifier cylinder body, and the liquid supplementing mouth on pressure intensifier cylinder body lateral wall is set up between axle body and liquid outlet, and the piston rod in main cylinder body reciprocatingly moves under the action of hydraulic oil, and utilize the one-way valve of liquid supplementing mouth and liquid outlet, and the hydraulic oil is supplemented by liquid supplementing mouth negative pressure, and exports high pressure hydraulic oil through liquid outlet. The utility model utilizes reciprocating linear motion piston rod to form plunger type movement in pressure intensifier cylinder, and utilizes the multiple of piston main body and axle body cross section area to realize the purpose of pressure intensification.

Description

Technical Field

[0001] This utility model belongs to the technical field of fluid pressure conversion equipment, and specifically relates to a novel hydraulic booster cylinder. Background Technology

[0002] As is well known, a booster cylinder is a hydraulic component that can output input pressure at a higher pressure. Its boosting principle is based on the pressure change caused by different pressure-bearing cross-sectional areas. Currently, existing booster equipment usually achieves pressure increase by increasing the pressure of the hydraulic system and increasing the piston diameter. Increasing the pressure of the hydraulic system not only increases manufacturing costs but also poses a risk of pipeline leakage; while increasing the piston diameter inevitably increases the size of the structure, placing higher demands on subsequent installation and maintenance. Utility Model Content

[0003] To solve the above problems, this utility model provides a novel hydraulic booster cylinder.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A novel hydraulic booster cylinder includes a main cylinder body, a booster cylinder body, and an internal piston rod. The booster cylinder body is sealed to the outlet end of the main cylinder body. The main cylinder body has a first oil port and a second oil port on its side wall, and the booster cylinder body has a replenishment port and an outlet port on its side wall. The piston rod includes a piston body and a shaft. The cross-sectional area of ​​the piston body is n times the cross-sectional area of ​​the shaft. The shaft is vertically disposed in the middle of the piston body. The first oil port and the second oil port are respectively disposed on both sides of the piston body. The piston body is disposed inside the sealed main cylinder body and slides in cooperation with the inner wall of the main cylinder body. The shaft passes through the outlet end of the main cylinder body and slides in cooperation with the inner wall of the booster cylinder body. The oil port is disposed between the piston body and the booster cylinder body, and the replenishment port is disposed between the shaft and the outlet port.

[0006] Furthermore, the fluid inlet is equipped with a first check valve for allowing hydraulic oil to enter the inner cavity of the booster cylinder through the fluid inlet; the fluid outlet is equipped with a second check valve for allowing the hydraulic oil in the booster cylinder to be discharged through the fluid outlet.

[0007] Furthermore, the cross-sectional area of ​​the piston body is four times that of the shaft body.

[0008] Furthermore, the outlet end of the main cylinder is provided with a cylinder port nut, and the external thread of the cylinder port nut can engage with the internal thread on the inner wall of the outlet end of the main cylinder.

[0009] Furthermore, the inner side of the outlet end of the main cylinder is provided with a guide sleeve that abuts against the cylinder nut. The outer diameter of the guide sleeve is smaller than the outer diameter of the cylinder nut, and the inner diameter of the guide sleeve is equal to the inner diameter of the cylinder nut. A sealing ring is provided between the guide sleeve and the inner wall of the main cylinder, and the shaft body slides in conjunction with the guide sleeve.

[0010] Furthermore, the inner walls of the cylinder nut and the guide sleeve are provided with sealing grooves for accommodating the sealing ring.

[0011] Furthermore, a flange is provided around the outlet end of the main cylinder body, and a connecting plate connected to the flange is provided around the connecting end of the booster cylinder body. The connecting plate and the flange are connected by bolts.

[0012] Furthermore, the outlet edge of the main cylinder body protrudes beyond the surface of the flange, and the connecting end of the booster cylinder body is provided with a stop that matches the outlet end of the main cylinder body.

[0013] Furthermore, the first exhaust channel is provided on the side wall of the cylinder nut, and exhaust gaps are provided between the inner hole of the main cylinder body and the outer wall of the cylinder nut, between the end face of the main cylinder body and the inner end face of the stop, and between the outer wall of the main cylinder body and the inner hole of the flange. The flange is provided with a second exhaust channel that connects the exhaust gaps and the outside.

[0014] Furthermore, a plug is provided at the rear end of the main cylinder body. The plug is stepped, and the rounded part of the plug fits into the inner wall of the main cylinder body. The stepped edge of the plug is welded and fixed to the rear end edge of the main cylinder body. The second oil port is provided through the plug.

[0015] The technological advancements achieved by this invention compared to existing technologies are as follows:

[0016] This invention involves installing a booster cylinder at the outlet end of the main cylinder, mounting the piston body (large diameter side of the piston rod) inside the main cylinder cavity, and extending the shaft (small diameter side of the piston rod) into the booster cylinder. Hydraulic oil enters and exits the main cylinder cavity through the oil port, and the piston rod reciprocates under the action of the hydraulic oil within the main cylinder. Since the force-bearing area of ​​the piston body is larger than the end face area of ​​the shaft, after installing check valves at the replenishment and outlet ports, hydraulic oil is replenished under negative pressure through the replenishment port as the piston rod moves towards the main cylinder. As the piston rod moves towards the booster cylinder, the shaft forms a plunger motion within the booster cylinder, outputting high-pressure hydraulic oil through the outlet port, thus achieving the purpose of pressurization. The reciprocating linear motion of the piston rod in this invention simulates a plunger-type suction and discharge pump, achieving a significant increase in pressure by driving the plunger motion through the piston movement. Attached Figure Description

[0017] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0018] In the attached diagram:

[0019] Figure 1 A cross-sectional structural schematic diagram of a novel hydraulic booster cylinder provided for an embodiment of this utility model;

[0020] Figure 2 This is a schematic diagram of the piston rod structure in an embodiment of the present utility model;

[0021] Figure 3 This is a schematic diagram of the guide sleeve in an embodiment of the present utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the cylinder nut in an embodiment of this utility model;

[0023] Figure 5 for Figure 1 A magnified view of a section at point A in the middle;

[0024] Figure 6 This is a schematic diagram showing the direction of hydraulic oil flow during the leftward movement of the piston rod in an embodiment of this utility model;

[0025] Figure 7 This is a schematic diagram showing the direction of hydraulic oil flow during the piston rod's rightward movement in an embodiment of this utility model.

[0026] In the picture:

[0027] 1-Main cylinder body; 2-Booster cylinder body; 3-Piston rod; 31-Piston body; 32-Shaft; 4-First oil port; 5-Replenishment port; 6-Outlet port; 7-First check valve; 8-Second check valve; 9-Cylinder port nut; 10-Guide sleeve; 11-Sealing groove; 12-Flange; 13-Connecting plate; 14-Plug; 15-Second oil port; 16-First exhaust passage; 17-Exhaust gap; 18-Second exhaust passage. Detailed Implementation

[0028] The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this utility model will be described below with reference to the accompanying drawings.

[0029] like Figure 1 , Figure 2As shown in the figure, a novel hydraulic booster cylinder provided by this utility model includes a main cylinder body 1, a booster cylinder body 2, and an internal piston rod 3. The booster cylinder body 2 is sealed to the outlet end of the main cylinder body 1. The side wall of the main cylinder body 1 is provided with a first oil port 4 and a second oil port 15. The side wall of the booster cylinder body 2 is provided with a replenishment port 5 and an outlet port 6. The piston rod 3 includes a piston body 31 and a shaft 32. The cross-sectional area of ​​the piston body 31 is n times the cross-sectional area of ​​the shaft 32. The shaft 32 is vertically disposed in the middle of the piston body 31. The first oil port 4 and the second oil port 15 are respectively disposed on both sides of the piston body. The piston body 31 is disposed inside the sealed main cylinder 1 and slides in cooperation with the inner wall of the main cylinder 1. The shaft 32 passes through the outlet end of the main cylinder 1 and slides in cooperation with the inner wall of the booster cylinder 2. The oil port 4 is disposed between the piston body 31 and the booster cylinder 2. The replenishment port 5 is disposed between the shaft 32 and the outlet port 6. The replenishment port 5 is provided with a first check valve 7 for allowing hydraulic oil to enter the inner cavity of the booster cylinder 2 through the replenishment port 5. The outlet port 6 is provided with a second check valve 8 for allowing the hydraulic oil in the booster cylinder 2 to be discharged through the outlet port 6. When the piston rod moves from the booster cylinder to the main cylinder, the booster cylinder forms a negative pressure, and hydraulic oil enters the booster cylinder through the replenishment port; when the piston rod moves from the main cylinder to the booster cylinder, because the area of ​​the hydraulic oil acting on the piston body is greater than the area at the end of the shaft, the hydraulic oil is output at n times the pressure through the outlet.

[0030] In a specific embodiment of this utility model, the cross-sectional area of ​​the piston body 31 is four times the cross-sectional area of ​​the shaft 32. In this embodiment, the outer diameter of the piston body is 100mm, the outer diameter of the shaft is 50mm, the stroke of the piston rod is 50mm, the maximum speed reaches 0.5 seconds for 50mm, the single-stroke return is approximately 0.5 seconds, the working cycle is 1 second, and the tolerance is 0.1 seconds. The maximum thrust of this embodiment is designed to be 15 tons, and the pressure is 20MPa.

[0031] In the actual manufacturing process, mounting holes for installing the shaft are machined on the piston body, and internal threads are machined at the rear end of the mounting holes to facilitate engagement with the rear thread of the shaft. At the same time, a cylinder port nut 9 is provided at the outlet end of the main cylinder body 1. The external thread of the cylinder port nut 9 can engage with the internal thread on the inner wall of the outlet end of the main cylinder body 1 for easy assembly.

[0032] As a preferred structure, such as Figure 3 , 4As shown, the main cylinder body 1 has a guide sleeve 10 on its inner side at the outlet end that abuts against the cylinder head nut 9. The outer diameter of the guide sleeve 10 is smaller than the outer diameter of the cylinder head nut 9, and the inner diameter of the guide sleeve 10 is equal to the inner diameter of the cylinder head nut 9. A sealing ring (not shown in the figure) is provided between the guide sleeve 10 and the inner wall of the main cylinder body 1. The shaft 32 is in sliding fit with the guide sleeve 10. At the same time, the inner walls of the booster cylinder body 2, the cylinder head nut 9, and the guide sleeve 10 are all provided with sealing grooves 11 for accommodating the sealing rings. Sealing grooves 11 for accommodating the sealing rings are also machined on the outer walls of the guide sleeve 10 and the piston body 31. This structure ensures that the guide sleeve can be smoothly installed in the main cylinder. The guide sleeve is sealed to the shaft and the main cylinder by means of the sealing rings on the inner and outer walls, and is fixed on the outlet side of the main cylinder. The shaft is sealed with the guide sleeve, the cylinder nut and the booster cylinder by the sealing ring, which ensures the stability of the piston rod during the reciprocating linear motion. At the same time, the guide sleeve and the cylinder nut are used to isolate the main cylinder and the booster cylinder, so as to achieve effective pressure transmission.

[0033] In specific embodiments of this utility model, such as Figure 1 As shown, the main cylinder body 1 has a flange 12 around its outlet end, and the booster cylinder body 2 has a connecting plate 13 around its connecting end, which is connected to the flange 12. The connecting plate 13 and the flange 12 are connected by bolts (not shown in the figure). The edge of the outlet end of the main cylinder body 1 protrudes from the surface of the flange 12. The connecting end of the booster cylinder body 2 has a stop that matches the outlet end of the main cylinder body 1, and the right end face of the cylinder nut 9 extends into the stop, which serves to position the main cylinder body.

[0034] In the specific production process, such as Figure 1 , 5 As shown, a first exhaust channel 16 is provided on the side wall of the cylinder head nut 9. Exhaust gaps 17 are provided between the inner hole of the main cylinder body 1 and the outer wall of the cylinder head nut 9, between the end face of the main cylinder body 1 and the inner end face of the stop, and between the outer wall of the main cylinder body 1 and the inner hole of the flange 12. A second exhaust channel 18 is provided inside the flange 12, connecting the exhaust gaps 17 and the outside. The exhaust channel formed by the first exhaust channel, the exhaust gaps, and the second exhaust channel can timely discharge the gas in the main cylinder body and the booster cylinder body.

[0035] Further optimize the above solution, such as Figure 1 As shown, a plug 14 is provided at the rear end of the main cylinder body 1. The plug 14 is stepped, and the rounded part of the plug 14 fits into the inner wall of the main cylinder body 1. The stepped edge of the plug 14 is welded and fixed to the rear end edge of the main cylinder body 1. The second oil port 15 is provided through the plug 14. This structure facilitates processing and manufacturing, as well as assembly and subsequent maintenance.

[0036] This utility model achieves isolation between the main cylinder and the booster cylinder through a guide sleeve and a cylinder port nut. The piston body of the piston rod is placed inside the main cylinder, and the shaft extends into the booster cylinder to form a plunger-type structure. Figure 6 , 7 As shown (the hollow arrows in the diagram indicate the direction of piston rod movement, and the solid arrows indicate the direction of hydraulic oil flow), the piston body 31 performs piston movement within the main cylinder 1, and the shaft 32 performs plunger movement within the booster cylinder. The specific movement process is as follows: When the piston rod 3 retracts into the main cylinder 1, a negative pressure is formed in the inner cavity of the main cylinder 1 on the right side of the piston body 31 and in the booster cylinder 2. Oil enters through the first oil port 4 and exits through the second oil port 15. Simultaneously, hydraulic oil is drawn into the booster cylinder 2 through the replenishment port 5. Conversely, when the piston rod 3 moves forward, a negative pressure is formed in the inner cavity of the main cylinder 1 on the left side of the piston body 31. Oil exits through the first oil port 4 and enters through the second oil port 15. The shaft of the piston rod 3 performs plunger movement within the booster cylinder 2, and high-pressure hydraulic oil is output multiple times through the outlet port 6.

[0037] When the cross-sectional area of ​​the piston body is four times that of the shaft, the pressure in the booster cylinder will be proportionally four times greater. When the force on the piston body is 10 MPa, the output pressure of the booster cylinder will increase to 40 MPa. Of course, the ratio of the cross-sectional area of ​​the piston body to that of the shaft can be adjusted according to actual needs.

[0038] In summary, this invention has the advantages of simple and compact structure and good pressurization effect. By extending the piston rod shaft from the main cylinder into the booster cylinder, piston movement occurs in the main cylinder, while plunger movement occurs in the booster cylinder. When the piston rod retracts into the main cylinder, hydraulic oil enters the booster cylinder through the replenishment port. When the piston rod pushes into the booster cylinder, the pressure is increased because the force-bearing area of ​​the large-diameter piston body is greater than the area of ​​the shaft end.

[0039] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A novel hydraulic booster cylinder, characterized in that: The system includes a main cylinder, a booster cylinder, and an internal piston rod. The booster cylinder is sealed to the outlet end of the main cylinder. The main cylinder has a first oil port and a second oil port on its side wall, and the booster cylinder has a replenishment port and an outlet port on its side wall. The piston rod includes a piston body and a shaft. The cross-sectional area of ​​the piston body is n times the cross-sectional area of ​​the shaft. The shaft is vertically disposed in the middle of the piston body. The first oil port and the second oil port are respectively disposed on both sides of the piston body. The piston body is disposed inside the sealed main cylinder and slides against the inner wall of the main cylinder. The shaft passes through the outlet end of the main cylinder and slides against the inner wall of the booster cylinder. The oil port is disposed between the piston body and the booster cylinder, and the replenishment port is disposed between the shaft and the outlet port.

2. The novel hydraulic booster cylinder according to claim 1, characterized in that: The fluid inlet is equipped with a first check valve for allowing hydraulic oil to enter the inner cavity of the booster cylinder through the fluid inlet; the fluid outlet is equipped with a second check valve for allowing hydraulic oil in the booster cylinder to be discharged through the fluid outlet.

3. The novel hydraulic booster cylinder according to claim 1, characterized in that: The cross-sectional area of ​​the piston body is four times that of the shaft body.

4. A novel hydraulic booster cylinder according to claim 1, characterized in that: The main cylinder body is provided with a cylinder port nut at the outlet end, and the external thread of the cylinder port nut can engage with the internal thread on the inner wall of the main cylinder body outlet end.

5. A novel hydraulic booster cylinder according to claim 4, characterized in that: The main cylinder body has a guide sleeve on the inner side of the outlet end that abuts against the cylinder nut. The outer diameter of the guide sleeve is smaller than the outer diameter of the cylinder nut, and the inner diameter of the guide sleeve is equal to the inner diameter of the cylinder nut. A sealing ring is provided between the guide sleeve and the inner wall of the main cylinder body, and the shaft body slides with the guide sleeve.

6. A novel hydraulic booster cylinder according to claim 5, characterized in that: The inner walls of the cylinder nut and guide sleeve are provided with sealing grooves for accommodating the sealing ring.

7. A novel hydraulic booster cylinder according to claim 4, characterized in that: The main cylinder body has a flange around its outlet end, and the booster cylinder body has a connecting plate around its connection end that is connected to the flange. The connecting plate and the flange are connected by bolts.

8. A novel hydraulic booster cylinder according to claim 7, characterized in that: The outlet edge of the main cylinder body protrudes from the surface of the flange, and the connecting end of the booster cylinder body is provided with a stop that matches the outlet end of the main cylinder body.

9. A novel hydraulic booster cylinder according to claim 8, characterized in that: The cylinder nut has a first exhaust channel on its side wall. Exhaust gaps are provided between the inner hole of the main cylinder body and the outer wall of the cylinder nut, between the end face of the main cylinder body and the inner end face of the stop, and between the outer wall of the main cylinder body and the inner hole of the flange. The flange has a second exhaust channel that connects the exhaust gaps and the outside.

10. A novel hydraulic booster cylinder according to any one of claims 1-9, characterized in that: The rear end of the main cylinder is provided with a plug, which is stepped. The rounded part of the plug fits into the inner wall of the main cylinder, and the stepped edge of the plug is welded and fixed to the rear end edge of the main cylinder. The second oil port is provided through the plug.

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