Improved ultrahigh pressure supercharger

Abstract

The utility model discloses an improved ultrahigh pressure supercharger which comprises a cylinder body, a cylinder barrel, a piston, a first flange, a second flange and a third flange. The two ends of the cylinder barrel are open, and the first flange is arranged at one end of the cylinder barrel. Openings are formed in the two ends of the cylinder body, and the third flange is arranged at one end of the cylinder body; the second flange is arranged between the other end of the cylinder barrel and the other end of the cylinder body; one end of the piston is positioned in the cylinder barrel; the other end of the piston penetrates through the second flange and then extends into the cylinder body. According to the improved ultrahigh pressure supercharger, an existing ultrahigh pressure supercharger is improved, a cylinder body for supercharging is improved into a through hole type structure from a bottom blind hole type structure, and meanwhile, a third flange is arranged at one end of the cylinder body; and the fatigue cracking phenomenon caused by stress concentration of the bottom of the bottomed oil cylinder in the background art can be effectively avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of ultra-high pressure superchargers, and particularly relates to an improved ultra-high pressure supercharger. Background Art

[0002] In the hydraulic system of an ultra-high pressure forming hydraulic press, an ultra-high pressure supercharger is generally used to convert the input of ordinary atmospheric pressure (25 MPa) into an ultra-high pressure output (rated pressure up to 80 MPa). The ultra-high pressure output end is connected to the main cylinder of the ultra-high pressure type hydraulic press, and the atmospheric pressure input end is connected to the hydraulic pump end. The ultra-high pressure supercharger is a key component of the hydraulic system of the ultra-high pressure type hydraulic press.

[0003] The existing patent application with the publication number CN108730242A discloses an ultra-high pressure supercharger, which has been mass-produced and applied in batches on an ultra-high pressure forming hydraulic press (rated pressure 80 MPa, such as a cooker press). As shown in the appendix Figure 1 As shown, the existing patent ultra-high pressure supercharger includes: 1-1, rear flange; 1-2, low-pressure cylinder barrel; 1-3, supercharging cylinder piston; 1-4, intermediate flange; 1-5, tie rod bolts and nuts; 1-6, ultra-high pressure cylinder block; 1-7, ultra-high pressure static seal; 1-8, ultra-high pressure dynamic seal. As shown in the appendix Figure 1 As shown, the supercharging process of the existing patent ultra-high pressure supercharger is that atmospheric pressure oil enters from the large chamber (cylinderless chamber) of the supercharger, pushes the piston rod, and outputs the oil in the ultra-high pressure chamber at an ultra-high pressure. The pressure values of the two chambers are in an inverse ratio relationship with the areas of the piston and the piston rod. However, after a long time of use, it is found that the existing patent ultra-high pressure supercharger has the following problems:

[0004] Problem 1: The ultra-high pressure cylinder block is a long blind hole structure (with a bottom), which needs to be integrally forged, and at the same time, the long blind hole is difficult to machine. Therefore, the overall manufacturing is difficult and the cost is high.

[0005] Problem 2: The stress concentration at the bottom fillet of the ultra-high pressure cylinder block (1-10) is large, the fillet is difficult to machine, and it is difficult to ensure the dimensional accuracy, form and position accuracy, and surface roughness, resulting in easy fatigue cracking at the bottom fillet of the cylinder block (1-10). Utility Model Content

[0006] The purpose of the utility model is to provide an improved ultra-high pressure supercharger, which improves the existing ultra-high pressure supercharger to avoid the fatigue cracking phenomenon caused by stress concentration at the bottom of the cylinder with a bottom in the prior art during use.

[0007] To achieve the above-mentioned utility model purpose, the technical solution adopted by the utility model is as follows:

[0008] An improved ultra-high pressure supercharger, comprising a cylinder block, a cylinder barrel, a piston, a first flange, a second flange, and a third flange; both ends of the cylinder barrel are open, and the first flange is arranged at one end of the cylinder barrel; both ends of the cylinder block are open, and the third flange is arranged at one end of the cylinder block; the second flange is arranged between the other end of the cylinder barrel and the other end of the cylinder block; one end of the piston is located inside the cylinder barrel; the other end of the piston penetrates through the second flange and extends into the cylinder block.

[0009] An improved ultra-high pressure supercharger of the present utility model improves the existing ultra-high pressure supercharger, improves the cylinder block for supercharging from a bottomed blind hole structure to a through-hole structure, and at the same time sets a third flange at one end of the cylinder block, which can effectively avoid the fatigue cracking phenomenon caused by stress concentration at the bottom of the cylinder in the background technology.

[0010] Preferably, the piston comprises a handle and a rod body; the handle is located inside the cylinder barrel; the second flange is provided with a through-hole matching the size of the rod body; the rod body is located inside the cylinder block after passing through the through-hole.

[0011] An improved ultra-high pressure supercharger of the present utility model is provided with a piston composed of a handle and a rod body connected together, so that it can be pushed by oil pressure and move back and forth between the cylinder barrel and the cylinder block.

[0012] Preferably, the size of the handle is the same as the internal size of the cylinder barrel; and both ends of the handle respectively abut against the inner top wall and the inner bottom wall of the cylinder barrel.

[0013] An improved ultra-high pressure supercharger of the present utility model divides the interior of the cylinder barrel into two non-communicating cavities by setting the handle so that both ends thereof respectively abut against the inner top wall and the inner bottom wall of the cylinder barrel.

[0014] Preferably, a low-pressure cavity is formed between the first flange and the handle; the first flange is provided with a low-pressure oil port; the low-pressure oil port is communicated with the low-pressure cavity.

[0015] An improved ultra-high pressure supercharger of the present utility model enables external oil to enter the low-pressure cavity through the low-pressure oil port and then push the piston to move towards the cylinder block by communicating the low-pressure oil port with the low-pressure cavity provided on the first flange.

[0016] Preferably, a return cavity is formed between the second flange and the handle; the second flange is provided with a return oil port; the return oil port is communicated with the return cavity.

[0017] An improved ultra-high pressure supercharger of the present utility model is provided with a return oil port on the second flange, which is communicated with a return cavity, so that external oil can enter the return cavity through the return oil port, and then push the piston to move away from the cylinder block.

[0018] Preferably, a high-pressure cavity is formed inside the cylinder block; the size of the high-pressure cavity is larger than the size of the rod body and smaller than the internal size of the cylinder barrel.

[0019] An improved ultra-high pressure supercharger of the present utility model, through this setting, there will be a gap between the rod body and the high-pressure cavity; at the same time, it is ensured that the overall oil volume in the low-pressure cavity is higher than that in the high-pressure cavity.

[0020] Preferably, the second flange is also provided with a high-pressure oil port; the high-pressure oil port is communicated with the high-pressure cavity.

[0021] An improved ultra-high pressure supercharger of the present utility model, by providing a high-pressure oil port on the second flange and communicating it with the high-pressure cavity, when the piston moves towards the cylinder block, the oil in the high-pressure cavity can be squeezed out from the high-pressure oil port.

[0022] Preferably, a first compensation seal is provided between the second flange and the rod body.

[0023] Preferably, a second compensation seal is provided between the second flange and the cylinder block.

[0024] Preferably, a third compensation seal is provided between the third flange and the cylinder block.

[0025] An improved ultra-high pressure supercharger of the present utility model, by providing the first compensation seal, the second compensation seal, and the third compensation seal, a compensable sealing structure is formed between the second flange, the cylinder block, and the third flange, avoiding the leakage phenomenon caused by the incomplete fitting of the contact surface between the ultra-high pressure cylinder block and the second flange due to the creep reduction of the pre-tightening force of the screw in the background technology, and further resulting in leakage due to seal extrusion.

[0026] Beneficial effects:

[0027] An improved ultra-high pressure supercharger of the present utility model improves the existing ultra-high pressure supercharger, changes the cylinder block for supercharging from a blind hole structure with a bottom to a through-hole structure, and at the same time sets a third flange at one end of the cylinder block, which can effectively avoid the fatigue cracking phenomenon caused by stress concentration at the bottom of the cylinder in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 Shown is a structural diagram of an ultra-high pressure supercharger in the prior art;

[0029] Figure 2The figure shows the structural diagram of an improved ultra-high pressure supercharger according to an embodiment;

[0030] Figure 3 The figure shows the schematic diagram of the first compensation seal according to an embodiment;

[0031] Figure 4 The figure shows the schematic diagram of the second compensation seal according to an embodiment;

[0032] Figure 5 The figure shows the schematic diagram of the third compensation seal according to an embodiment.

[0033] Reference numerals

[0034] 2-1, first flange; 2-2, cylinder barrel; 2-3, piston; 2-4, second flange; 2-5, bolt; 2-6, cylinder block; 2-7, static seal; 2-8, dynamic seal; 2-9, third flange; 2-10, retaining ring; 2-11, low-pressure oil port; 2-12, low-pressure chamber; 2-13, return stroke chamber; 2-14, return stroke oil port; 2-15, high-pressure oil port; 2-16, high-pressure chamber; 2-17, first compensation seal; 2-18, second compensation seal; 2-19, third compensation seal; D1, first seal dimension; D2, second seal dimension; M, contact surface between the ultra-high pressure cylinder block and the second flange; N, contact surface between the ultra-high pressure cylinder block and the third flange. Detailed implementation manners

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will describe the specific implementation manners of the present invention with reference to the accompanying drawings. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained according to these drawings, and other implementation manners can be obtained.

[0036] The following will introduce the technical solutions of the present invention in detail with specific embodiments.

[0037] Embodiment

[0038] As Figures 2 to 5 shown, an improved ultra-high pressure supercharger in this embodiment includes a cylinder block 2-6, a cylinder barrel 2-2, a piston 2-3, a first flange 2-1, a second flange 2-4, and a third flange 2-9; both ends of the cylinder barrel 2-2 are open, and the first flange 2-1 is arranged at one end of the cylinder barrel 2-2; both ends of the cylinder block 2-6 are open, and the third flange 2-9 is arranged at one end of the cylinder block 2-6; the second flange 2-4 is arranged between the other end of the cylinder barrel 2-2 and the other end of the cylinder block 2-6; one end of the piston 2-3 is located inside the cylinder barrel 2-2; the other end of the piston 2-3 penetrates through the second flange 2-4 and then extends into the cylinder block 2-6.

[0039] An improved ultra-high pressure supercharger according to this embodiment improves the existing ultra-high pressure supercharger. The cylinder block 2-6 for supercharging is improved from a blind hole structure with a bottom to a through-hole structure. At the same time, a third flange 2-9 is provided at one end of the cylinder block 2-6, which can effectively avoid the fatigue cracking phenomenon caused by stress concentration at the bottom of the cylinder in the background art.

[0040] Preferably, the piston 2-3 includes a handle and a rod body; the handle is located inside the cylinder barrel 2-2; the second flange 2-4 is provided with a through-hole matching the size of the rod body; the rod body is located inside the cylinder block 2-6 after passing through the through-hole.

[0041] An improved ultra-high pressure supercharger according to this embodiment is provided with a piston 2-3 composed of a connected handle and rod body, so that it can be pushed by oil pressure and move back and forth between the cylinder barrel 2-2 and the cylinder block 2-6.

[0042] Preferably, the size of the handle is the same as the internal size of the cylinder barrel 2-2; and both ends of the handle abut against the inner top wall and the inner bottom wall of the cylinder barrel 2-2 respectively.

[0043] An improved ultra-high pressure supercharger according to this embodiment divides the interior of the cylinder barrel 2-2 into two non-communicating cavities by setting the handle so that both ends thereof abut against the inner top wall and the inner bottom wall of the cylinder barrel 2-2 respectively.

[0044] Preferably, a low-pressure cavity 2-12 is formed between the first flange 2-1 and the handle; the first flange 2-1 is provided with a low-pressure oil port 2-11; the low-pressure oil port 2-11 is communicated with the low-pressure cavity 2-12.

[0045] An improved ultra-high pressure supercharger according to this embodiment allows external oil to enter the low-pressure cavity 2-12 through the low-pressure oil port 2-11 by providing the low-pressure oil port 2-11 on the first flange 2-1 and communicating it with the low-pressure cavity 2-12, and then pushes the piston 2-3 to move towards the cylinder block 2-6.

[0046] Preferably, a return cavity 2-13 is formed between the second flange 2-4 and the handle; the second flange 2-4 is provided with a return oil port 2-14; the return oil port 2-14 is communicated with the return cavity 2-13.

[0047] An improved ultra-high pressure supercharger according to this embodiment allows external oil to enter the return cavity 2-13 through the return oil port 2-14 by providing the return oil port 2-14 on the second flange 2-4 and communicating it with the return cavity 2-13, and then pushes the piston 2-3 to move away from the cylinder block 2-6.

[0048] Preferably, a high-pressure cavity 2-16 is formed inside the cylinder block 2-6; the size of the high-pressure cavity 2-16 is larger than the size of the rod body and smaller than the internal size of the cylinder barrel 2-2.

[0049] An improved ultra-high pressure supercharger according to this embodiment is configured such that there is a gap between the rod body and the high-pressure chamber 2-16; meanwhile, the overall oil quantity in the low-pressure chamber 2-12 is ensured to be higher than that in the high-pressure chamber 2-16.

[0050] Preferably, the second flange 2-4 is further provided with a high-pressure oil port 2-15; the high-pressure oil port 2-15 is in communication with the high-pressure chamber 2-16.

[0051] An improved ultra-high pressure supercharger according to this embodiment is configured such that when the piston 2-3 moves towards the cylinder block 2-6 by providing a high-pressure oil port 2-15 on the second flange 2-4 and communicating it with the high-pressure chamber 2-16, the oil in the high-pressure chamber 2-16 can be squeezed out from the high-pressure oil port 2-15.

[0052] Preferably, a first compensation seal 2-17 is provided between the second flange 2-4 and the rod body.

[0053] Preferably, a second compensation seal 2-18 is provided between the second flange 2-4 and the cylinder block 2-6.

[0054] Preferably, a third compensation seal 2-19 is provided between the third flange 2-9 and the cylinder block 2-6.

[0055] An improved ultra-high pressure supercharger according to this embodiment forms a compensable sealing structure between the second flange 2-4, the cylinder block 2-6, and the third flange 2-9 by providing the first compensation seal 2-17, the second compensation seal 2-18, and the third compensation seal 2-19, thereby avoiding the leakage phenomenon caused by the incomplete fitting of the contact surface between the ultra-high pressure cylinder block 2-6 and the second flange 2-4 due to the creep reduction of the pre-tightening force of the screw in the background art and further resulting from seal extrusion.

[0056] Specifically, in the hydraulic system of an ultra-high pressure forming hydraulic press, an ultra-high pressure supercharger is commonly used to convert the input of ordinary atmospheric pressure (25 AMPa) into the output of ultra-high pressure (rated pressure up to 80 MPa); the ultra-high pressure in this embodiment is a pressure ≥ 80 MPa; the low pressure is a pressure ≤ 25 AMPa.

[0057] Specifically, the cylinder block 2-6 in this embodiment is an ultra-high pressure cylinder block 2-6; the cylinder barrel 2-2 is a low-pressure cylinder barrel 2-2.

[0058] Specifically, the improved ultra-high pressure supercharger according to this embodiment has the following advantages:

[0059] Specifically, the improved ultra-high pressure supercharger of this embodiment further includes a bolt 2-5 and a nut; the screw of the bolt 2-5 is longer than the screw used in the existing ultra-high pressure supercharger, and can adapt to the distance change between the ultra-high pressure cylinder block 2-6 and the second flange 2-4 caused by the structural improvement of the ultra-high pressure cylinder block 2-6.

[0060] Specifically, the improved ultra-high pressure supercharger of this embodiment further includes a retaining ring 2-10, which is arranged between the ultra-high pressure cylinder block 2-6 and the third flange 2-9, and the retaining ring 2-10 is a Y-shaped seal with a retaining ring for ultra-high pressure.

[0061] Specifically, the ultra-high pressure cylinder block 2-6 of this embodiment has a through-hole structure, and the inner hole can be machined from both ends, greatly reducing the overall machining difficulty of the improved ultra-high pressure supercharger.

[0062] Specifically, the improved ultra-high pressure supercharger of this embodiment further includes a static seal 2-7 and a dynamic seal 2-8; the static seal 2-7 is arranged between the second flange 2-4 and the ultra-high pressure cylinder block 2-6; the dynamic seal 2-8 is arranged between the second flange 2-4 and the rod body; the static seal 2-7 is an ultra-high pressure static seal; the dynamic seal 2-8 is an ultra-high pressure dynamic seal.

[0063] Specifically, as Figure 2 shown, this embodiment is designed with a first seal dimension D1 and a second seal dimension D2, and the second seal dimension D2 is greater than the first seal dimension D1. In this way, a hydraulic adhesion force of the ultra-high pressure cylinder block 2-6 on the second flange 2-4 will be generated. The hydraulic adhesion force F = PX, where X is the area of D2 - the area of D1, and P is the pressure in the high-pressure chamber 2-16. In this way, even if the pre-tightening force of the screw is insufficient and the gap is generated on the N surface (the contact surface between the ultra-high pressure cylinder block 2-6 and the third flange 2-9), the M surface (the contact surface between the ultra-high pressure cylinder block 2-6 and the second flange 2-4) will always remain in a fitting state due to the action of the hydraulic pressure F. Furthermore, even if there is a gap on the N surface, there will be no leakage because the seal of the third flange 2-9 is a radial seal.

[0064] Furthermore, since the seal of the third flange 2-9 adopts a radial structure of an ultra-high pressure Y-shaped seal with a retaining ring 2-10, a little gap is allowed on the N surface and no leakage will be caused.

[0065] Specifically, the center of the stop of the third flange 2-9 of this embodiment is designed as a concave structure to cope with the situation that when the ultra-high pressure cylinder block 2-6 is under ultra-high pressure working conditions, the inner hole expands due to the deformation caused by the internal pressure; and since the inner wall of the concave shape of the third flange 2-9 will also deform and expand outward under pressure, a compensation seal needs to be designed so that they can ensure that the seal is within the appropriate gap value range even when they deform simultaneously.

[0066] Furthermore, the first compensation seal 2-17 of this embodiment can adjust the sealing distance between the rod body and the second flange 2-4, and the second compensation seal 2-18 can adjust the sealing distance between the second flange 2-4 and the ultra-high pressure cylinder block 2-6. Moreover, the height of the second compensation seal 2-18 can also adjust the length of D1. The third compensation seal 2-19 of this embodiment can adjust the sealing distance between the ultra-high pressure cylinder block 2-6 and the third flange 2-9, and the height of the third compensation seal 2-19 can also adjust the length of D2. Thus, the improved ultra-high pressure supercharger of this embodiment can adjust the hydraulic adhesion force of the ultra-high pressure cylinder block 2-6 on the second flange 2-4 and the third flange 2-9 through these compensation seals.

[0067] Specifically, the low-pressure cylinder barrel 2-2 and the ultra-high pressure cylinder block 2-6 of this embodiment are independent, which is beneficial to the independent design and optimization of parts and reduces costs.

[0068] Specifically, the ultra-high pressure dynamic seal of this embodiment is borne by the piston 2-3 rod seal of a small specification, which reduces costs.

[0069] Specifically, this embodiment adopts an in-built structure of the piston 2-3 rod to avoid the hidden danger of external leakage of the piston 2-3 rod dynamic seal.

[0070] Specifically, the improved ultra-high pressure supercharger of this embodiment has a targeted structural design for the ultra-high pressure seal, which can reduce the hidden danger of pipeline leakage.

[0071] The above has elaborated in detail on the embodiments of an improved ultra-high pressure supercharger provided by the present utility model. Specific examples are used herein to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the core idea of the present utility model. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present utility model, several improvements and modifications can still be made to the present utility model, and these improvements and modifications also fall within the protection scope of the claims of the present utility model.

Claims

1. An improved ultra-high pressure supercharger, characterized in that: The invention comprises a cylinder body (2-6), a cylinder barrel (2-2), a piston (2-3), a first flange (2-1), a second flange (2-4), and a third flange (2-9); both ends of the cylinder barrel (2-2) are open, and the first flange (2-1) is arranged at one end of the cylinder barrel (2-2); both ends of the cylinder body (2-6) are open, and the third flange (2-9) is arranged at one end of the cylinder body (2-6); the second flange (2-4) is arranged between the other end of the cylinder barrel (2-2) and the other end of the cylinder body (2-6); one end of the piston (2-3) is located in the cylinder barrel (2-2); the other end of the piston (2-3) passes through the second flange (2-4) and then extends into the cylinder body (2-6).

2. The improved ultra-high pressure supercharger according to claim 1, characterized in that: The piston (2-3) comprises a handle and a rod; the handle is located inside the cylinder (2-2); the second flange (2-4) is provided with a through hole matching the size of the rod; the rod is located inside the cylinder (2-6) after passing through the through hole.

3. The improved ultra-high pressure supercharger according to claim 2, characterized in that: The size of the handle is the same as the internal size of the cylinder (2-2); and the two ends of the handle respectively abut against the inner top wall and the inner bottom wall of the cylinder (2-2).

4. The improved ultra-high pressure supercharger according to claim 3, characterized in that: A low-pressure chamber (2-12) is formed between the first flange (2-1) and the handle; the first flange (2-1) is provided with a low-pressure oil port (2-11); the low-pressure oil port (2-11) and the low-pressure chamber (2-12) are in communication.

5. The improved ultra-high pressure supercharger according to claim 3, characterized in that: A return cavity (2-13) is formed between the second flange (2-4) and the handle; the second flange (2-4) is provided with a return oil port (2-14); the return oil port (2-14) and the return cavity (2-13) are in communication.

6. The improved ultra-high pressure supercharger according to claim 3, characterized in that: A high-pressure chamber (2-16) is formed inside the cylinder body (2-6); the size of the high-pressure chamber (2-16) is larger than the size of the rod body and smaller than the internal size of the cylinder barrel (2-2).

7. The improved ultra-high pressure supercharger according to claim 6, characterized in that: The second flange (2-4) is also provided with a high-pressure oil port (2-15); the high-pressure oil port (2-15) is communicated with the high-pressure chamber (2-16).

8. The improved ultra-high pressure supercharger according to any one of claims 2 to 7, characterized in that: A first compensating seal (2-17) is provided between the second flange (2-4) and the shaft.

9. The improved ultra-high pressure supercharger according to any one of claims 1 to 7, characterized in that: A second compensating seal (2-18) is provided between the second flange (2-4) and the cylinder body (2-6).

10. The improved ultra-high pressure supercharger according to any one of claims 1 to 7, characterized in that: A third compensating seal (2-19) is provided between the third flange (2-9) and the cylinder body (2-6).

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