Two-stage hydraulic drive compressor cylinder clearance adjusting method

Abstract

The invention relates to the technical field of liquid-driven compressors, in particular to a two-stage liquid-driven compressor air cylinder clearance adjusting method. Comprising a hydraulic cylinder, the two sides of the hydraulic cylinder are connected with a first-stage air cylinder and a second-stage air cylinder through half connecting barrels respectively, an oil piston is arranged in the hydraulic cylinder, the two sides of the oil piston are connected with oil cylinder piston rods respectively, a first-stage air piston is arranged in the first-stage air cylinder and connected with a first-stage air cylinder piston rod, and a second-stage air piston is arranged in the second-stage air cylinder. A pressing device is installed on the end face, close to the oil cylinder piston rod, of the first-stage air cylinder, and a pushing device is arranged between the second-stage air cylinder piston rod and the oil cylinder piston rod. The distance between the first-stage air cylinder piston rod and the oil cylinder piston rod is measured through the feeler gauge, and the gasket with the corresponding thickness is additionally arranged between the first-stage air cylinder piston rod and the oil cylinder piston rod, so that the numerical value requirement of the first-stage air cylinder clearance can be met, and the precise measurement and the precise adjustment of the two-stage hydraulic drive compressor air cylinder clearance are realized.

Description

Technical Field:

[0001] The present invention relates to the technical field of liquid-driven compressors, and in particular to a method for adjusting the clearance of a two-stage liquid-driven compressor cylinder. Background Art:

[0002] Currently, a two-stage liquid-driven compressor generally consists of a first-stage cylinder, a second-stage cylinder, two connecting cylinders, and a hydraulic cylinder. The two connecting cylinders are respectively used to connect the hydraulic cylinder with the first-stage cylinder and the second-stage cylinder. An oil piston is provided in the hydraulic cylinder, and air pistons are respectively provided in the first-stage cylinder and the second-stage cylinder. Both sides of the oil piston are respectively connected to the piston rods of the oil cylinder. The air pistons are connected to the piston rods of the cylinders. The piston rods of the oil cylinders on both sides and the piston rods of the cylinders are respectively connected through couplings in the connecting cylinders. When the oil piston reciprocates, it drives the air piston to reciprocate through the piston rods of the oil cylinder and the piston rods of the cylinder, so as to realize the pressurization of the gas. During the operation of the first-stage cylinder and the second-stage cylinder, there will be a certain clearance between the air piston and the cylinder head. In many cases, specific numerical requirements are imposed on the clearance. However, during the current assembly process, since the clearance is inside the cylinder, it is difficult to accurately measure and accurately adjust the clearance, and it is very difficult to meet the numerical requirements of the clearance. At present, there is no good solution to the above problems.

[0003] In summary, the problem of accurately adjusting the clearance of the cylinders in a two-stage liquid-driven compressor has become a technical problem that urgently needs to be solved in the industry. Summary of the Invention:

[0004] The present invention is to make up for the deficiencies of the prior art and provides a method for adjusting the clearance of a two-stage liquid-driven compressor cylinder, which solves the problem that it is difficult to accurately measure and accurately adjust the clearance in the past.

[0005] The technical solution adopted by the present invention to solve the above technical problems is:

[0006] A method for adjusting the clearance of a two-stage liquid-driven compressor cylinder, including a hydraulic cylinder. The two sides of the hydraulic cylinder are respectively connected to the first-stage cylinder and the second-stage cylinder through half-connecting cylinders. An oil piston is provided in the hydraulic cylinder. Both sides of the oil piston are respectively connected to the piston rods of the oil cylinder. A first-stage air piston is provided in the first-stage cylinder, and the first-stage air piston is connected to the piston rod of the first-stage cylinder. A second-stage air piston is provided in the second-stage cylinder, and the second-stage air piston is connected to the piston rod of the second-stage cylinder;

[0007] When adjusting the clearance of the first-stage cylinder, install the pressing device on the end face of the first-stage cylinder close to the piston rod of the oil cylinder. Drive the piston rod of the first-stage cylinder to the left until there is no relative displacement through the pressing device. Then install the pushing device between the piston rod of the second-stage cylinder and the piston rod of the oil cylinder. Drive the piston rod of the second-stage cylinder to the right and the piston rod of the oil cylinder to the left until there is no relative displacement through the pushing device. Then measure the distance X between the piston rod of the first-stage cylinder and the piston rod of the oil cylinder with a feeler gauge. Assuming that the required clearance value of the first-stage cylinder is n, the thickness of the adjusting gasket to be added between the piston rod of the first-stage cylinder and the piston rod of the oil cylinder is X - n. After connecting the piston rod of the first-stage cylinder and the piston rod of the oil cylinder through the coupling, the clearance value of the first-stage cylinder is n;

[0008] When adjusting the clearance of the second-stage cylinder, install the pressing device on the end face of the second-stage cylinder close to the piston rod of the oil cylinder. Drive the piston rod of the second-stage cylinder to the right until there is no relative displacement through the pressing device. Then install the pushing device between the piston rod of the first-stage cylinder and the piston rod of the oil cylinder. Drive the piston rod of the first-stage cylinder to the left and the piston rod of the oil cylinder to the right until there is no relative displacement through the pushing device. Then measure the distance Y between the piston rod of the second-stage cylinder and the piston rod of the oil cylinder with a feeler gauge. Assuming that the required clearance value of the second-stage cylinder is m, the thickness of the adjusting gasket to be added between the piston rod of the second-stage cylinder and the piston rod of the oil cylinder is Y - m. After connecting the piston rod of the second-stage cylinder and the piston rod of the oil cylinder through the coupling, the clearance value of the second-stage cylinder is m.

[0009] The pressing device includes a pressing plate. The inner end of the pressing plate is provided with a semi-circular opening that contacts the groove of the piston rod of the first-stage cylinder. The outer end of the pressing plate is provided with a support bolt. The support bolt passes through the pressing plate and is threadedly connected to the first-stage cylinder. The middle of the pressing plate is provided with a long hole. The pressing bolt passes through the long hole and is threadedly connected to the first-stage cylinder. A pressing nut is provided at the end of the pressing bolt away from the first-stage cylinder.

[0010] By screwing the pressing nut, the pressing plate drives the piston rod of the first-stage cylinder or the piston rod of the second-stage cylinder away from the piston rod of the oil cylinder under the action of the lever force until there is no relative displacement between the piston rod of the first-stage cylinder or the piston rod of the second-stage cylinder and the piston rod of the oil cylinder. At this time, the first-stage piston or the second-stage piston is completely attached to the cylinder head.

[0011] The pushing device includes a pushing sleeve. One end of the pushing sleeve is provided with a threaded hole, and a pushing bolt is connected in the threaded hole.

[0012] By screwing out the pushing bolt, make the pushing sleeve contact the piston rod of the oil cylinder, and the pushing bolt contact the piston rod of the first-stage cylinder or the piston rod of the second-stage cylinder until the pushing bolt can no longer be screwed out, that is, there is no relative displacement between the piston rod of the first-stage cylinder or the piston rod of the second-stage cylinder and the piston rod of the oil cylinder. At this time, the first-stage piston or the second-stage piston is completely attached to the cylinder head, and the oil piston is completely attached to the left or right side of the hydraulic cylinder.

[0013] The present invention adopts the above - mentioned solution and has the following advantages:

[0014] By setting a pressing device and a pushing device, when adjusting the clearance of the first - stage cylinder, the pressing device is installed on the end face of the first - stage cylinder close to the piston rod of the oil cylinder. By screwing the pressing nut until there is no relative displacement of the piston rod of the first - stage cylinder 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 oil cylinder. By screwing the pushing bolt until there is no relative displacement of the piston rod of the second - stage cylinder to the right and the piston rod of the oil cylinder to the left. At this time, the distance between the piston rod of the first - stage cylinder and the piston rod of the oil cylinder is measured with a feeler gauge, and gaskets with corresponding thicknesses are added between the piston rod of the first - stage cylinder and the piston rod of the oil cylinder, then the numerical requirements for the clearance of the first - stage cylinder can be met. By adopting the above operations, the numerical requirements for the clearance of the second - stage cylinder can also be met, thus realizing the precise measurement and precise adjustment of the clearances of the cylinders of the two - stage liquid - driven compressor. Brief description of the drawings:

[0015] Figure 1 It is a three - dimensional structure schematic diagram of the present invention.

[0016] Figure 2 It is Figure 1 an enlarged schematic diagram of part A in

[0017] Figure 3 It is Figure 1 an enlarged schematic diagram of part B in

[0018] Figure 4 It is a sectional structure schematic diagram of the present invention.

[0019] In the figure, 1. Hydraulic cylinder, 2. Half - coupling, 3. First - stage cylinder, 4. Second - stage cylinder, 5. Oil piston, 6. Piston rod of the oil cylinder, 7. First - stage air piston, 8. Piston rod of the first - stage cylinder, 9. Second - stage air piston, 10. Piston rod of the second - stage cylinder, 11. Cylinder head, 12. Pressing plate, 13. Semi - circular opening, 14. Support bolt, 15. Long slot, 16. Pressing bolt, 17. Pressing nut, 18. Pushing sleeve, 19. Pushing bolt. Specific embodiments:

[0020] To clearly illustrate the technical features of this solution, the present invention will be elaborated in detail below through specific embodiments and in combination with its drawings.

[0021] As shown in Figures 1-4As shown in the figure, a method for adjusting the clearance of a two-stage liquid-driven compressor cylinder includes a hydraulic cylinder 1. The two sides of the hydraulic cylinder 1 are respectively connected to a first-stage cylinder 3 and a second-stage cylinder 4 through half couplings 2. The half couplings 2 can not only play the role of connecting a fixed length but also expose the operating space. An oil piston 5 is arranged in the hydraulic cylinder 1. The two sides of the oil piston 5 are respectively connected to a hydraulic cylinder piston rod 6. A first-stage air piston 7 is arranged in the first-stage cylinder 3. The first-stage air piston 7 is connected to a first-stage cylinder piston rod 8. A second-stage air piston 9 is arranged in the second-stage cylinder 4. The second-stage air piston 9 is connected to a second-stage cylinder piston rod 10;

[0022] When adjusting the clearance of the first-stage cylinder 3, install the pressing device on the end face of the first-stage cylinder 3 close to the hydraulic cylinder piston rod 6. By screwing the pressing nut 17 until there is no relative displacement of the first-stage cylinder piston rod 8 to the left anymore, then install the pushing device between the second-stage cylinder piston rod 10 and the hydraulic cylinder piston rod 6. By screwing the pushing bolt 19 until there is no relative displacement of the second-stage cylinder piston rod 10 to the right and the hydraulic cylinder piston rod 6 to the left anymore. Then measure the distance X between the first-stage cylinder piston rod 8 and the hydraulic cylinder piston rod 6 with a feeler gauge. Assuming that the required clearance value of the first-stage cylinder 3 is n, then the thickness of the adjustment shim that needs to be added between the first-stage cylinder piston rod 8 and the hydraulic cylinder piston rod 6 is X - n. After connecting the first-stage cylinder piston rod 8 and the hydraulic cylinder piston rod 6 through a coupling, the clearance value of the first-stage cylinder 3 is n;

[0023] Similarly, when adjusting the clearance of the second-stage cylinder 4, install the pressing device on the end face of the second-stage cylinder 4 close to the hydraulic cylinder piston rod 6. By screwing the pressing nut 17 until there is no relative displacement of the second-stage cylinder piston rod 10 to the right anymore, then install the pushing device between the first-stage cylinder piston rod 8 and the hydraulic cylinder piston rod 6. By screwing the pushing bolt 19 until there is no relative displacement of the first-stage cylinder piston rod 8 to the left and the hydraulic cylinder piston rod 6 to the right anymore. Then measure the distance Y between the second-stage cylinder piston rod 10 and the hydraulic cylinder piston rod 6 with a feeler gauge. Assuming that the required clearance value of the second-stage cylinder 4 is m, then the thickness of the adjustment shim that needs to be added between the second-stage cylinder piston rod 10 and the hydraulic cylinder piston rod 6 is Y - m. After connecting the second-stage cylinder piston rod 10 and the hydraulic cylinder piston rod 6 through a coupling, the clearance value of the second-stage cylinder 4 is m.

[0024] The pressing device includes a pressing plate 12. The inner end of the pressing plate 12 is provided with a semi-circular opening 13 which is in contact with the groove of the piston rod 8 of the first-stage cylinder or the piston rod 10 of the second-stage cylinder. The outer end of the pressing plate 12 is provided with a support bolt 14. The support bolt 14 passes through the pressing plate 12 and is threadedly connected to the first-stage cylinder 3 or the second-stage cylinder 4. The middle of the pressing plate 12 is provided with a long slot 15. The pressing bolt 16 passes through the long slot 15 and is threadedly connected to the first-stage cylinder 3 or the second-stage cylinder 4. The long slot 15 can reserve a moving space for the pressing bolt 16. One end of the pressing bolt 16 far from the first-stage cylinder 3 or the second-stage cylinder 4 is provided with a pressing nut 17. During installation, the support bolt 14 is inserted into the pressing plate 12 and threadedly connected to the first-stage cylinder 3 or the second-stage cylinder 4. The relative distance of the support bolt 14 is adjusted according to the extending length of the piston rod 8 of the first-stage cylinder or the piston rod 10 of the second-stage cylinder. The semi-circular opening 13 of the pressing plate 12 is in contact with the groove of the piston rod 8 of the first-stage cylinder or the piston rod 10 of the second-stage cylinder. Then the pressing bolt 16 is passed through the long slot 15 of the pressing plate 12 and threadedly connected to the first-stage cylinder 3 or the second-stage cylinder 4. The pressing nut 17 is screwed so that the pressing nut 17 is in contact with the pressing plate 12. The pressing nut 17 is continuously screwed. Under the action of the lever force, the pressing plate 12 drives the piston rod 8 of the first-stage cylinder or the piston rod 10 of the second-stage cylinder away from the piston rod 6 of the oil cylinder until there is no relative displacement between the piston rod 8 of the first-stage cylinder or the piston rod 10 of the second-stage cylinder and the piston rod 6 of the oil cylinder. At this time, the first-stage air piston 7 or the second-stage air piston 9 is completely attached to the cylinder head 11.

[0025] The pushing device includes a pushing sleeve 18. One end of the pushing sleeve 18 is provided with a threaded hole, and a pushing bolt 19 is connected in the threaded hole. During installation, first, the pushing bolt 19 is inserted into the pushing sleeve 18, and the relative distance of the pushing bolt 19 is adjusted according to the distance between the piston rod 8 of the first-stage cylinder or the piston rod 10 of the second-stage cylinder and the piston rod 6 of the oil cylinder. Then the pushing bolt 19 and the pushing sleeve 18 are inserted between the piston rod 8 of the first-stage cylinder or the piston rod 10 of the second-stage cylinder and the piston rod 6 of the oil cylinder. Then the pushing bolt 19 is continuously screwed out with a wrench so that the pushing sleeve 18 is in contact with the piston rod 6 of the oil cylinder and the pushing bolt 19 is in contact with the piston rod 8 of the first-stage cylinder or the piston rod 10 of the second-stage cylinder until the pushing bolt 19 cannot be screwed out anymore, that is, there is no relative displacement between the piston rod 8 of the first-stage cylinder or the piston rod 10 of the second-stage cylinder and the piston rod 6 of the oil cylinder. At this time, the first-stage air piston 7 or the second-stage air piston 9 is completely attached to the cylinder head 11, and the oil piston 5 is completely attached to the left or right side of the hydraulic cylinder 1.

[0026] After the measurement is completed, select a gasket with a thickness of X-n and place it between the piston rod 8 of the first-stage cylinder and the piston rod 6 of the oil cylinder. Then, fixedly connect the piston rod 8 of the first-stage cylinder and the piston rod 6 of the oil cylinder through a coupling. Select a gasket with a thickness of Y-m and place it between the piston rod 10 of the second-stage cylinder and the piston rod 6 of the oil cylinder. Then, fixedly connect the piston rod 10 of the second-stage cylinder and the piston rod 6 of the oil cylinder through a coupling. Finally, install the other half of the adapter sleeve to complete the assembly of the entire two-stage liquid-driven compressor, achieving precise measurement and precise adjustment of the cylinder clearance of the two-stage liquid-driven compressor, so that the clearances of the first-stage cylinder 3 and the second-stage cylinder 4 can both meet the specified numerical requirements.

[0027] The above specific implementation manners cannot be used as a limitation on the protection scope of the present invention. For those skilled in the art of this technology, any alternative improvement or transformation made to the implementation manner of the present invention falls within the protection scope of the present invention.

[0028] Those parts not detailed in the present invention are all well-known technologies to those skilled in the art of this technology.

Claims

1. A method for adjusting the clearance of a two-stage liquid-driven compressor cylinder, characterized in that: It includes a hydraulic cylinder. The two sides of the hydraulic cylinder are respectively connected to a first-stage air cylinder and a second-stage air cylinder through half couplings. An oil piston is arranged inside the hydraulic cylinder. The two sides of the oil piston are respectively connected to a hydraulic cylinder piston rod. A first-stage air piston is arranged inside the first-stage air cylinder. The first-stage air piston is connected to a first-stage air cylinder piston rod. A second-stage air piston is arranged inside the second-stage air cylinder. The second-stage air piston is connected to a second-stage air cylinder piston rod; When adjusting the clearance of the first-stage air cylinder, install the pressing device on the end face of the first-stage air cylinder close to the hydraulic cylinder piston rod. Drive the first-stage air cylinder piston rod to the left through the pressing device until there is no relative displacement. Then install the pushing device between the second-stage air cylinder piston rod and the hydraulic cylinder piston rod. Drive the second-stage air cylinder piston rod to the right and the hydraulic cylinder piston rod to the left through the pushing device until there is no relative displacement. Then measure the distance X between the first-stage air cylinder piston rod and the hydraulic cylinder piston rod with a feeler gauge. Assume that the required clearance value of the first-stage air cylinder is n. Then the thickness of the adjusting shim to be added between the first-stage air cylinder piston rod and the hydraulic cylinder piston rod is X - n. After connecting the first-stage air cylinder piston rod and the hydraulic cylinder piston rod through a coupling, the clearance value of the first-stage air cylinder is n; When adjusting the clearance of the second-stage air cylinder, install the pressing device on the end face of the second-stage air cylinder close to the hydraulic cylinder piston rod. Drive the second-stage air cylinder piston rod to the right through the pressing device until there is no relative displacement. Then install the pushing device between the first-stage air cylinder piston rod and the hydraulic cylinder piston rod. Drive the first-stage air cylinder piston rod to the left and the hydraulic cylinder piston rod to the right through the pushing device until there is no relative displacement. Then measure the distance Y between the second-stage air cylinder piston rod and the hydraulic cylinder piston rod with a feeler gauge. Assume that the required clearance value of the second-stage air cylinder is m. Then the thickness of the adjusting shim to be added between the second-stage air cylinder piston rod and the hydraulic cylinder piston rod is Y - m. After connecting the second-stage air cylinder piston rod and the hydraulic cylinder piston rod through a coupling, the clearance value of the second-stage air cylinder is m.

2. The method for adjusting cylinder clearance of a two-stage liquid-driven compressor according to claim 1, characterized in that: The pressing device includes a pressing plate. The inner end of the pressing plate is provided with a semi-circular opening that contacts the groove of the first-stage air cylinder piston rod or the second-stage air cylinder piston rod. The outer end of the pressing plate is provided with a support bolt. The support bolt passes through the pressing plate and is threadedly connected to the first-stage air cylinder or the second-stage air cylinder. The middle of the pressing plate is provided with a long hole. A pressing bolt passes through the long hole and is threadedly connected to the first-stage air cylinder or the second-stage air cylinder. A pressing nut is arranged at the end of the pressing bolt away from the first-stage air cylinder or the second-stage air cylinder.

3. A method for adjusting the clearance of a two-stage liquid-driven compressor cylinder according to claim 2, characterized in that: By screwing the pressing nut, the pressing plate drives the first-stage air cylinder piston rod or the second-stage air cylinder piston rod away from the hydraulic cylinder piston rod under the action of the lever force until there is no relative displacement between the first-stage air cylinder piston rod or the second-stage air cylinder piston rod and the hydraulic cylinder piston rod. At this time, the first-stage air piston or the second-stage air piston is completely attached to the cylinder head.

4. The method for adjusting cylinder clearance of a two-stage liquid-driven compressor according to claim 1, characterized in that: The pushing device includes a pushing sleeve. One end of the pushing sleeve is provided with a threaded hole, and a pushing bolt is connected in the threaded hole.

5. A method for adjusting the clearance of a two-stage liquid-driven compressor cylinder according to claim 4, characterized in that: By screwing out the pushing bolt, make the pushing sleeve contact the hydraulic cylinder piston rod, and the pushing bolt contact the first-stage air cylinder piston rod or the second-stage air cylinder piston rod until the pushing bolt can no longer be screwed out, that is, there is no relative displacement between the first-stage air cylinder piston rod or the second-stage air cylinder piston rod and the hydraulic cylinder piston rod. At this time, the first-stage air piston or the second-stage air piston is completely attached to the cylinder head, and the oil piston is completely attached to the left or right side of the hydraulic cylinder.

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