German Saacke valves Saacke models Saacke prices

Saacke valves use liquid as the working medium to transmit energy and perform control. Hydraulic transmission and pneumatic transmission are collectively referred to as fluid power transmission, an emerging technology developed based on the principle of hydrostatic pressure transmission proposed by Pascal in the 18th century, and is widely used in industrial and agricultural production.

Saacke valve basic principles

The basic principle of hydraulic transmission is to use pressurized oil as the working medium in a closed container to achieve energy conversion and power transmission. The liquid therein is called the working medium, generally mineral oil, and its function is similar to that of transmission components such as belts, chains, and gears in mechanical transmission. Hydraulic transmission utilizes Pascal's principle! Pascal's principle is roughly: in a closed environment, when a force is applied to a liquid, the liquid transmits this force in all directions, and the magnitude of the pressure remains unchanged! P=F/S. Hydraulic transmission utilizes this physical property to apply a force to an object with a small area, using Pascal's principle to cause an object with a large area to receive a large force! Thereby achieving the effect of lifting heavy objects. Hydraulic transmission is also widely used in the valve industry, such as machine tool manufacturing and processing equipment for valves, hydraulic test equipment for valves, and hydraulic transmission devices for valves.

Saacke valve advantages and disadvantages

Advantages: 1) Small size and light weight, resulting in low inertial force, so no significant impact occurs during sudden overload or stopping; 2) Can smoothly and automatically adjust traction speed within a given range, and can achieve stepless speed regulation; 3) Easy reversal; without changing the motor rotation direction, it is relatively convenient to convert between rotary and linear reciprocating motion of the working mechanism; 4) The hydraulic pump and hydraulic motor are connected by oil pipes, so there are no strict restrictions on spatial arrangement; 5) Since oil is used as the working medium, the relative moving surfaces of components can self-lubricate, resulting in low wear and long service life; 6) Simple operation and control, high degree of automation; 7) Easy to implement overload protection. Disadvantages: 1) High maintenance requirements for hydraulic transmission; the working oil must always be kept clean; 2) High manufacturing precision requirements for hydraulic components, complex processes, and higher costs; 3) Maintenance of hydraulic components is complex and requires a high level of technical skill; 4) Using oil as the working medium poses a fire hazard at the working surface; 5) Low transmission efficiency.

Saacke valve maintenance methods

In the manufacturing process of hydraulic valves, to effectively improve assembly precision, the selective assembly method is mostly chosen. That is, for a batch of finished parts, such as valve spools and valve bodies, the most reasonable fit clearance should be selected based on actual dimensions, and then assembled, thereby ensuring that the valve spool has good sliding performance and good sealing performance. In other words, for hydraulic valves of the same type, there may be certain differences in the mating dimensions between the valve body and the valve spool. In actual use, when there are many failed hydraulic valves in an enterprise, all hydraulic valves can be disassembled and cleaned, each part inspected and measured, parts classified according to the inspection results, and then recombined and selected using certain methods. After inspection, if wear is found on both the valve body and the valve spool, but there are no severe scratches on the working surface or no severe local wear, valve bodies and valve spools with appropriate clearances can be selected for reassembly; if the fit clearance between the valve body and the valve increases compared to the clearance specified in the product drawings, and the increase is between 20% and 25%, certain methods should be adopted to increase the valve spool size, followed by lapping repair. For the seat and spool in conical valve groups, if the contact surface sealing in the conical seat valve is poor, since the conical valve can automatically compensate for the clearance under spring action, grinding is sufficient. If the wear between the valve body and the valve is uneven or there are scratches on the working surface, and the above methods cannot restore the hydraulic valve function well, then when selecting the valve body and valve spool, the interference amount in the machining allowance requirements should be met. For the valve body bore, appropriate reaming should be performed, and for the valve spool, appropriate grinding should be performed, so that the shape precision and assembly clearance are reasonable.

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