A two-stage liquid-drive compressor cylinder clearance adjusting device

Abstract

This utility model relates to the field of hydraulic compressor technology, and more particularly to a cylinder clearance adjustment device for a two-stage hydraulic compressor. It includes a hydraulic cylinder, with a primary cylinder and a secondary cylinder connected to its two sides via semi-conduits. An oil piston is installed inside the hydraulic cylinder, with piston rods connected to its two sides. A primary air piston is installed inside the primary cylinder, connected to its piston rod. A secondary air piston is installed inside the secondary cylinder, connected to its piston rod. A clamping device is installed on the end face of the primary cylinder near the oil cylinder piston rod, and a pushing device is installed between the secondary cylinder piston rod and the oil cylinder piston rod. By measuring the distance between the primary cylinder piston rod and the oil cylinder piston rod with a feeler gauge, and adding a shim of appropriate thickness between them, the required clearance value for the primary cylinder can be met, thus achieving precise measurement and adjustment of the cylinder clearance of the two-stage hydraulic compressor.

Description

Technical fields:

[0001] This utility model relates to the field of liquid-driven compressor technology, and in particular to a cylinder clearance adjustment device for a two-stage liquid-driven compressor. Background technology:

[0002] Currently, two-stage hydraulic compressors typically consist of a primary cylinder, a secondary cylinder, two connecting cylinders, and a hydraulic cylinder. The two connecting cylinders connect the hydraulic cylinder to the primary and secondary cylinders, respectively. The hydraulic cylinder contains an oil piston, while the primary and secondary cylinders each contain a pneumatic piston. Oil piston rods are connected to both sides of the oil pistons, and pneumatic pistons are connected to the pneumatic piston rods. The oil piston rods and pneumatic piston rods are connected within the connecting cylinders via couplings. When the oil pistons reciprocate, they drive the pneumatic pistons to reciprocate via the oil and pneumatic piston rods, thus pressurizing the gas. During operation, a certain clearance exists between the pneumatic piston and the cylinder head in both the primary and secondary cylinders. Many applications have specific numerical requirements for this clearance. However, during assembly, because this clearance is located inside the cylinder, it is difficult to accurately measure and adjust it, making it challenging to meet the required clearance values. Currently, there is no good solution to this problem.

[0003] In summary, the precise adjustment of cylinder clearance in two-stage hydraulic compressors has become a technical challenge that urgently needs to be addressed in the industry. Utility model content:

[0004] To overcome the shortcomings of the prior art, this utility model provides a two-stage hydraulic compressor cylinder clearance adjustment device, which solves the problem of difficulty in accurately measuring and adjusting the clearance in the past.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows:

[0006] A two-stage hydraulically driven compressor cylinder clearance adjustment device includes a hydraulic cylinder. A primary cylinder and a secondary cylinder are connected to each other via semi-joints on both sides of the hydraulic cylinder. An oil piston is installed inside the hydraulic cylinder, with piston rods connected to both sides. A primary air piston is installed inside the primary cylinder and connected to its piston rod. A secondary air piston is installed inside the secondary cylinder and connected to its piston rod. A clamping device is installed on the end face of the primary cylinder near the piston rod of the oil cylinder. The clamping device is used to press the piston rod of the primary cylinder to the left, ensuring complete contact between the primary air piston and the cylinder head. A pushing device is provided between the piston rod of the secondary cylinder and the piston rod of the oil cylinder. The pushing device is used to press the piston rod of the secondary cylinder to the right, ensuring complete contact between the secondary air piston and the cylinder head, and simultaneously press the piston rod of the oil cylinder to the left, ensuring complete contact between the oil piston and the left side of the hydraulic cylinder.

[0007] The clamping device includes a pressure plate. The inner end of the pressure plate has a semi-circular opening that contacts the groove of the piston rod of the first-stage cylinder. The outer end of the pressure plate has a support bolt that passes through the pressure plate and is threaded to the first-stage cylinder. The middle part of the pressure plate has an elongated hole through which the clamping bolt passes and is threaded to the first-stage cylinder. The end of the clamping bolt away from the first-stage cylinder has a clamping nut.

[0008] The jacking device includes a jacking sleeve, one end of which is provided with a threaded hole, and a jacking bolt is connected inside the threaded hole.

[0009] The present invention adopts the above solution and has the following advantages:

[0010] By setting up a clamping device and a pushing device, when adjusting the clearance of the first-stage cylinder, the clamping device is installed on the end face of the first-stage cylinder near the piston rod of the hydraulic cylinder. The clamping nut is tightened until the piston rod of the first-stage cylinder no longer has relative displacement to the left. At the same time, the pushing device is installed between the piston rod of the second-stage cylinder and the piston rod of the hydraulic cylinder. The pushing bolt is tightened until the piston rod of the second-stage cylinder no longer has relative displacement to the right and the piston rod of the hydraulic cylinder no longer has relative displacement to the left. At this time, the distance between the piston rod of the first-stage cylinder and the piston rod of the hydraulic cylinder is measured with a feeler gauge. A shim of appropriate thickness is added between the piston rod of the first-stage cylinder and the piston rod of the hydraulic cylinder to meet the numerical requirements of the clearance of the first-stage cylinder. The same operation can be used to meet the numerical requirements of the clearance of the second-stage cylinder, thereby realizing the accurate measurement and precise adjustment of the cylinder clearance of the two-stage hydraulic compressor. Attached image description:

[0011] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0012] Figure 2 for Figure 1 A magnified structural diagram of part A in the diagram.

[0013] Figure 3 for Figure 1 A magnified structural diagram of part B in the diagram.

[0014] Figure 4 This is a cross-sectional structural diagram of the present invention.

[0015] In the diagram, 1. Hydraulic cylinder, 2. Half-joint sleeve, 3. First-stage cylinder, 4. Second-stage cylinder, 5. Oil piston, 6. Oil cylinder piston rod, 7. First-stage air piston, 8. First-stage cylinder piston rod, 9. Second-stage air piston, 10. Second-stage cylinder piston rod, 11. Cylinder head, 12. Pressure plate, 13. Semicircular opening, 14. Support bolt, 15. Long slot, 16. Clamping bolt, 17. Clamping nut, 18. Push sleeve, 19. Push bolt. Detailed implementation method:

[0016] To clearly illustrate the technical features of this solution, the present invention will be described in detail below through specific embodiments and in conjunction with the accompanying drawings.

[0017] like Figure 1-4 As shown, a two-stage hydraulically driven compressor cylinder clearance adjustment device includes a hydraulic cylinder 1. The two sides of the hydraulic cylinder 1 are connected to a first-stage cylinder 3 and a second-stage cylinder 4 via semi-joints 2. The semi-joints 2 serve both to connect to a fixed length and to expose the operating space. An oil piston 5 is installed inside the hydraulic cylinder 1, and oil cylinder piston rods 6 are connected to both sides of the oil piston 5. A first-stage air piston 7 is installed inside the first-stage cylinder 3, and the first-stage air piston 7 is connected to the first-stage cylinder piston rod 8. A second-stage air piston 9 is installed inside the second-stage cylinder 4, and the second-stage air piston 9 is connected to... Connecting the piston rod 10 of the secondary cylinder, a clamping device is installed on the end face of the primary cylinder 3 near the piston rod 6 of the hydraulic cylinder. The clamping device is used to press the piston rod 8 of the primary cylinder to the left so that the primary piston 7 is completely in contact with the cylinder head 11. A pushing device is provided between the piston rod 10 of the secondary cylinder and the piston rod 6 of the hydraulic cylinder. The pushing device is used to press the piston rod 10 of the secondary cylinder to the right so that the secondary piston 9 is completely in contact with the cylinder head 11, and at the same time press the piston rod 6 of the hydraulic cylinder to the left so that the hydraulic piston 5 is completely in contact with the left side of the hydraulic cylinder 1.

[0018] The clamping device includes a pressure plate 12. The inner end of the pressure plate 12 is provided with a semi-circular opening 13 that contacts the groove of the piston rod 8 of the first-stage cylinder. The outer end of the pressure plate 12 is provided with a support bolt 14. The support bolt 14 passes through the pressure plate 12 and is threadedly connected to the first-stage cylinder 3. The middle part of the pressure plate 12 is provided with an elongated hole 15. The clamping bolt 16 passes through the elongated hole 15 and is threadedly connected to the first-stage cylinder 3. The elongated hole 15 can provide room for the clamping bolt 16 to move. The end of the clamping bolt 16 away from the first-stage cylinder 3 is provided with a clamping nut 17. During installation, insert the support bolt 14 into the pressure plate 12 and thread it onto the first-stage cylinder 3. Adjust the relative distance of the support bolt 14 according to the extension length of the first-stage cylinder piston rod 8. The semi-circular opening 13 of the pressure plate 12 contacts the groove of the first-stage cylinder piston rod 8. Then, pass the clamping bolt 16 through the elongated hole 15 of the pressure plate 12 and thread it onto the first-stage cylinder 3. Tighten the clamping nut 17 so that it contacts the pressure plate 12. Continue to tighten the clamping nut 17. Under the action of leverage, the pressure plate 12 carries the first-stage cylinder piston rod 8 away from the oil cylinder piston rod 6 until there is no more relative displacement between the first-stage cylinder piston rod 8 and the oil cylinder piston rod 6. At this time, the first-stage piston 7 and the cylinder head 11 are completely in contact.

[0019] The pushing device includes a pushing sleeve 18, one end of which is provided with a threaded hole, and a pushing bolt 19 is connected in the threaded hole. During installation, the pushing bolt 19 is first inserted into the pushing sleeve 18, and the relative distance of the pushing bolt 19 is adjusted according to the distance between the secondary cylinder piston rod 10 and the hydraulic cylinder piston rod 6. Then, the pushing bolt 19 and the pushing sleeve 18 are inserted between the secondary cylinder piston rod 10 and the hydraulic cylinder piston rod 6. Then, the pushing bolt 19 is continuously unscrewed with a wrench until the pushing sleeve 18 contacts the hydraulic cylinder piston rod 6 and the pushing bolt 19 contacts the secondary cylinder piston rod 10, until the pushing bolt 19 can no longer be unscrewed, that is, the secondary cylinder piston rod 10 and the hydraulic cylinder piston rod 6 no longer have relative displacement. At this time, the secondary cylinder piston 9 is completely in contact with the cylinder head 11, and the hydraulic piston 5 is completely in contact with the left side of the hydraulic cylinder 1.

[0020] Working principle:

[0021] When adjusting the clearance of the first-stage cylinder 3, the clamping device is installed on the end face of the first-stage cylinder 3 near the piston rod 6 of the hydraulic cylinder. The clamping nut 17 is tightened until the piston rod 8 of the first-stage cylinder no longer has relative displacement to the left. Then, the pushing device is installed between the piston rod 10 of the second-stage cylinder and the piston rod 6 of the hydraulic cylinder. The pushing bolt 19 is tightened until the piston rod 10 of the second-stage cylinder no longer has relative displacement to the right and the piston rod 6 of the hydraulic cylinder no longer has relative displacement to the left. Then, the distance X between the piston rod 8 of the first-stage cylinder and the piston rod 6 of the hydraulic cylinder is measured with a feeler gauge. Assuming that the clearance value required for the first-stage cylinder 3 is n, the thickness of the adjustment shim that needs to be added between the piston rod 8 of the first-stage cylinder and the piston rod 6 of the hydraulic cylinder is Xn.

[0022] Similarly, when adjusting the clearance of the secondary cylinder 4, the clamping device is installed on the end face of the secondary cylinder 4 near the piston rod 6 of the oil cylinder. The clamping nut 17 is tightened until the piston rod 10 of the secondary cylinder no longer has relative displacement to the right. Then, the pushing device is installed between the piston rod 8 of the primary cylinder and the piston rod 6 of the oil cylinder. The pushing bolt 19 is tightened until the piston rod 8 of the primary cylinder no longer has relative displacement to the left and the piston rod 6 of the oil cylinder no longer has relative displacement to the right. Then, the distance Y between the piston rod 10 of the secondary cylinder and the piston rod 6 of the oil cylinder is measured with a feeler gauge. Assuming that the clearance value of the secondary cylinder 4 is required to be m, the thickness of the adjustment shim that needs to be added between the piston rod 10 of the secondary cylinder and the piston rod 6 of the oil cylinder is Ym.

[0023] After measurement, a shim of thickness Xn is placed between the piston rod 8 of the first-stage cylinder and the piston rod 6 of the oil cylinder. Then, the piston rod 8 of the first-stage cylinder and the piston rod 6 of the oil cylinder are fixedly connected by a coupling. A shim of thickness Ym is placed between the piston rod 10 of the second-stage cylinder and the piston rod 6 of the oil cylinder. Then, the piston rod 10 of the second-stage cylinder and the piston rod 6 of the oil cylinder are fixedly connected by a coupling. Finally, the other half of the connecting cylinder is installed, and the assembly of the entire two-stage liquid-driven compressor is completed. This enables precise measurement and adjustment of the cylinder clearance of the two-stage liquid-driven compressor, ensuring that the clearance of the first-stage cylinder 3 and the second-stage cylinder 4 meets the specified numerical requirements.

[0024] The above specific embodiments should not be construed as limiting the scope of protection of this utility model. For those skilled in the art, any alternative improvements or modifications made to the embodiments of this utility model shall fall within the scope of protection of this utility model.

[0025] Any aspects of this utility model not described in detail are known to those skilled in the art.

Claims

1. A cylinder clearance adjustment device for a two-stage hydraulically driven compressor, characterized in that: The system includes a hydraulic cylinder, with a primary cylinder and a secondary cylinder connected to each other via semi-joints on both sides. The hydraulic cylinder contains an oil piston, with piston rods connected to both sides. The primary cylinder contains a primary air piston connected to its piston rod. The secondary cylinder contains a secondary air piston connected to its piston rod. A clamping device is installed on the end face of the primary cylinder near the oil cylinder piston rod, pressing the primary cylinder piston rod to the left to ensure complete contact between the primary air piston and the cylinder head. A pushing device is located between the secondary cylinder piston rod and the oil cylinder piston rod, pressing the secondary cylinder piston rod to the right to ensure complete contact between the secondary air piston and the cylinder head, while simultaneously pressing the oil cylinder piston rod to the left to ensure complete contact between the oil piston and the left side of the hydraulic cylinder.

2. The cylinder clearance adjustment device for a two-stage hydraulically driven compressor according to claim 1, characterized in that: The clamping device includes a pressure plate. The inner end of the pressure plate has a semi-circular opening that contacts the groove of the piston rod of the first-stage cylinder. The outer end of the pressure plate has a support bolt that passes through the pressure plate and is threaded to the first-stage cylinder. The middle part of the pressure plate has an elongated hole through which the clamping bolt passes and is threaded to the first-stage cylinder. The end of the clamping bolt away from the first-stage cylinder has a clamping nut.

3. The cylinder clearance adjustment device for a two-stage hydraulically driven compressor according to claim 1, characterized in that: The jacking device includes a jacking sleeve, one end of which is provided with a threaded hole, and a jacking bolt is connected inside the threaded hole.

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