With the popularity of the application of hydraulic cartridge valves, the importance of the aluminum hydraulic manifold block in the hydraulic system has been more and more people know, and its application is more and more extensive, so is it good? Today we will go through the following introduction, together to understand the relevant content of the aluminum hydraulic manifold block.
Advantages of aluminum hydraulic manifold block
A hydraulic valve can operate in various ways to control hydraulic oil. Typically, it works in conjunction with a solenoid coil pressure valve to achieve automated control easily. It can control the on and off functions of oil, gas, and water piping systems in hydropower stations remotely. Hydraulic valves can be divided into pressure control valves, flow (speed) control valves and directional control valves, etc., to achieve a more loaded composite action or function, the need for more than one valve to complete the corresponding control, the connection between the hydraulic valve needs aluminum hydraulic manifold block, with the aluminum hydraulic manifold block can make the hydraulic design more easily to achieve standardisation, modularity, but also greatly improves the design flexibility and convenience. Aluminum hydraulic manifold block is also more hydraulic system is more compact, integration is higher, thus reducing costs.
Design Basis The following relevant written information should be used for the design of the valve block body:
a) Correct and detailed hydraulic schematic diagram of the valve block;
b) Hydraulic operating parameters and control requirements;
(c) The shape of the valve block, oil port layout and installation and connection requirements.
Aluminum hydraulic manifold block production
1. The surface roughness of the mounting valves and flanges on the aluminum hydraulic manifold block should reach Ra0.4, and the surface roughness of the sealing surface of the end pipe fitting should reach Ra3.2. In addition, the perpendicularity tolerance between the screw holes of the mounting pipe fittings and their outer fitting surfaces should be at least grade 8.
2. You should ensure that all screw holes on the valve block meet machining accuracy requirements, generally choosing 7H. Attach the machining accuracy requirements for threaded cartridge valve mounting holes to the product samples. You should also achieve a roughness of Ra0.8 for cartridge valve mounting holes, along with meeting size tolerance and shape tolerance requirements. 0-ring groove surface roughness of Ra3.2, the general surface roughness of the runner for Ra12.5.
3. High-pressure valve blocks are best made from 35 forged steel. For general valve blocks, use A3 steel or ductile iron. When cutting the valve block material from plates using gas cutting, ensure there is enough machining allowance. It is preferable to forge the blank of the valve block before processing. Processing of the valve block material needs to ensure that the internal organisation of dense, there shall be no interlayers, trachoma and other defects, if necessary, the blank should be flaw detection. Cast iron blocks and larger steel blocks should be aged and pretreated before machining.
Aluminum hydraulic manifold block design considerations
Aluminum hydraulic manifold block design, the oil circuit should be as simple as possible, to minimise deep holes, slant holes and process holes. When designing a valve block, you should match the aperture to the flow. Ensure that the hole through the block provides sufficient flow area. Pay attention to the direction and location of the inlet and outlet, and align them with the overall system layout and pipeline connection form. Additionally, consider the installation and operation craft, including whether the components need vertical or horizontal installation. Ensure that the installation meets all requirements.
When designing adjustable components, you should ensure that the design facilitates convenient operation and observation. For example, place relief valves, speed control valves, and other adjustable components in positions where the adjustment handle is easy to operate.
Components that need frequent maintenance and key components such as proportional valves, servo valves, etc. should be on the top or outside of the valve block, so as to facilitate disassembly and installation. In addition, you should design the valve block with a sufficient number of pressure measurement points for debugging. For valve blocks weighing more than 30 kg, include lift screw holes. However, ensure that you minimize the volume of the valve block while meeting these requirements.
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