What should be paid attention to in the design of the hydraulic valve block of the hydraulic system?
What should be paid attention to in the design of the hydraulic valve block of the hydraulic system? Dalan Hydraulics will tell you in detail, mainly in the following aspects:
1. The shape of the hydraulic valve block is generally rectangular hexahedron.
2. The hydraulic valve block material should be 35 steel forgings or continuous casting blanks.
3. The maximum side length of the hydraulic valve block should not be greater than 600mm, and the number of two-way cartridge valve inserts included should not be greater than 8.
4. When there are more than 8 inserts in the hydraulic circuit, it should be decomposed into several valve blocks. The valve blocks are connected with each other by bolts. The connecting holes at the joint surface are sealed with O-rings. The overall valve block set. The rectangular performance of the connecting bolts should not be lower than 12.9.
5. When designing the main stage of the hydraulic valve block, it should be considered to minimize the flow resistance loss and ease of processing.
6. When the main-stage tunnel and the plurality of inserts are penetrated, in order to reduce the local flow resistance loss at the penetration, it is preferable to adopt a method of biasing the plug hole (the center line of the main-stage tunnel is offset from the center line of the plug hole). The centerline of the main channel is generally tangential to the wall of the plug hole.
7. In order to improve the deep hole processability, the design may consider increasing the aperture or using the method of drilling and docking at both ends.
8. When designing, try to avoid setting the control connection channel and three-dimensional oblique hole in the hydraulic valve block. You should make full use of the control hole in the control cover, or use the special control channel connector such as the pilot control block. If the diameter of the pilot tunnel is reduced due to process requirements, it should be checked to confirm that it will not affect the control requirements of the main valve.
9, should avoid the use of inclined holes. When it is necessary to tilt, the inclination angle of the tunnel should not exceed 35°, and the sealing of the orifice must be ensured. For the main grade inclined hole, the long axis size of the elliptical hole caused by the oblique hole machining should be marked on the relevant view.
10. When the aperture of the smaller hole is not more than 25mm, the distance between the walls of the two adjacent holes shall be not less than 5mm; when the hole diameter of the smaller hole is larger than 25mm, the distance between the walls of the adjacent holes shall not be less than 10mm.
11. In order to avoid the deposition of pollutants, the hole depth should generally reach the center line of the communicating channel for the communicating holes.
12. The external port of the main channel is generally flanged. For smaller ports with a diameter of 25 mm or less, a threaded connection is also possible. The external port of the pilot port should be threaded.
13. The process tunnel should be plugged in by detachable means such as screw plug or flange to clean, clean and inspect the tunnel. When the position is not allowed, the hole with a diameter of not more than 12mm is allowed to be plugged with a ball-up plug.
14. The necessary inspection ports shall be provided on the main channel and the main pilot channel to detect the working parameters of the hydraulic circuit. The test port should generally be equipped with a pressure tap with a quick connect function.
15. All external oil ports and detection ports of the hydraulic valve block shall have oil port marks, and the oil port marks shall be consistent with the corresponding marks on the hydraulic schematic.
16. The nameplate installation position should be reserved in the conspicuous part of the hydraulic valve block.
17. The hydraulic valve block should have a lifting structure, generally using a lifting eye screw.
18. When using forging blanks, it should be normalized to eliminate residual internal stress. Non-destructive testing shall be carried out as necessary to check the internal quality.
19. The edge chamfer is 2×45°, and when the valve body is small, the chamfer is 1.5×45°.
20, each oil passage orifice should be kept sharp, do not chamfer, but should be deburred. The threaded hole chamfer depth of each pipe joint shall not be greater than one-half of the pitch.
21. Deburr and flash, carefully remove the chips and impurities in the tunnel and clean them.
22. Put the corresponding oil port mark on the oil port. The hole diameter of the steel plate is not less than 6mm (subject to the sealing performance of the O-ring).
23. When the surface of the hydraulic valve block is treated by electroless nickel plating, the plating thickness is 0.008-0.012 mm.
24. The hydraulic valve block after processing should be protected against rust and dust. The surface should be covered and stored in a clean and dry place.
----- Editor-in-Chief: Dalan Oil Pump Motor 02-Procurement Consultant
Copyright http: / (Dalan Motor) Reprint, please indicate the source
Http://news.chinawj.com.cn Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn
What should be paid attention to in the design of the hydraulic valve block of the hydraulic system? Dalan Hydraulics will tell you in detail, mainly in the following aspects:
1. The shape of the hydraulic valve block is generally rectangular hexahedron.
2. The hydraulic valve block material should be 35 steel forgings or continuous casting blanks.
3. The maximum side length of the hydraulic valve block should not be greater than 600mm, and the number of two-way cartridge valve inserts included should not be greater than 8.
4. When there are more than 8 inserts in the hydraulic circuit, it should be decomposed into several valve blocks. The valve blocks are connected with each other by bolts. The connecting holes at the joint surface are sealed with O-rings. The overall valve block set. The rectangular performance of the connecting bolts should not be lower than 12.9.
5. When designing the main stage of the hydraulic valve block, it should be considered to minimize the flow resistance loss and ease of processing.
6. When the main-stage tunnel and the plurality of inserts are penetrated, in order to reduce the local flow resistance loss at the penetration, it is preferable to adopt a method of biasing the plug hole (the center line of the main-stage tunnel is offset from the center line of the plug hole). The centerline of the main channel is generally tangential to the wall of the plug hole.
7. In order to improve the deep hole processability, the design may consider increasing the aperture or using the method of drilling and docking at both ends.
8. When designing, try to avoid setting the control connection channel and three-dimensional oblique hole in the hydraulic valve block. You should make full use of the control hole in the control cover, or use the special control channel connector such as the pilot control block. If the diameter of the pilot tunnel is reduced due to process requirements, it should be checked to confirm that it will not affect the control requirements of the main valve.
9, should avoid the use of inclined holes. When it is necessary to tilt, the inclination angle of the tunnel should not exceed 35°, and the sealing of the orifice must be ensured. For the main grade inclined hole, the long axis size of the elliptical hole caused by the oblique hole machining should be marked on the relevant view.
10. When the aperture of the smaller hole is not more than 25mm, the distance between the walls of the two adjacent holes shall be not less than 5mm; when the hole diameter of the smaller hole is larger than 25mm, the distance between the walls of the adjacent holes shall not be less than 10mm.
11. In order to avoid the deposition of pollutants, the hole depth should generally reach the center line of the communicating channel for the communicating holes.
12. The external port of the main channel is generally flanged. For smaller ports with a diameter of 25 mm or less, a threaded connection is also possible. The external port of the pilot port should be threaded.
13. The process tunnel should be plugged in by detachable means such as screw plug or flange to clean, clean and inspect the tunnel. When the position is not allowed, the hole with a diameter of not more than 12mm is allowed to be plugged with a ball-up plug.
14. The necessary inspection ports shall be provided on the main channel and the main pilot channel to detect the working parameters of the hydraulic circuit. The test port should generally be equipped with a pressure tap with a quick connect function.
15. All external oil ports and detection ports of the hydraulic valve block shall have oil port marks, and the oil port marks shall be consistent with the corresponding marks on the hydraulic schematic.
16. The nameplate installation position should be reserved in the conspicuous part of the hydraulic valve block.
17. The hydraulic valve block should have a lifting structure, generally using a lifting eye screw.
18. When using forging blanks, it should be normalized to eliminate residual internal stress. Non-destructive testing shall be carried out as necessary to check the internal quality.
19. The edge chamfer is 2×45°, and when the valve body is small, the chamfer is 1.5×45°.
20, each oil passage orifice should be kept sharp, do not chamfer, but should be deburred. The threaded hole chamfer depth of each pipe joint shall not be greater than one-half of the pitch.
21. Deburr and flash, carefully remove the chips and impurities in the tunnel and clean them.
22. Put the corresponding oil port mark on the oil port. The hole diameter of the steel plate is not less than 6mm (subject to the sealing performance of the O-ring).
23. When the surface of the hydraulic valve block is treated by electroless nickel plating, the plating thickness is 0.008-0.012 mm.
24. The hydraulic valve block after processing should be protected against rust and dust. The surface should be covered and stored in a clean and dry place.
----- Editor-in-Chief: Dalan Oil Pump Motor 02-Procurement Consultant
Copyright http: / (Dalan Motor) Reprint, please indicate the source
Http://news.chinawj.com.cn Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn
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