Semi-mounted plough slewing mechanism bypass valve
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Solution Overview
Problem
Previous semi-mounted reversible plows with slewing mechanisms experience prolonged turning processes due to bidirectional hydraulic damping, which does not differentiate between the direction of stroke paths, leading to increased operational time without reducing material stress.
Innovation Solution
Incorporating a bypass mechanism that undamps the stroke path from the working position to the intermediate position, allowing the hydraulic cylinders to operate at increased speed without damping, and using end position damping only during the second half of the turning process when the plow frame's weight rests on the cylinder, along with check valves to ensure directional control of fluid flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If hydraulic damping is applied to the entire stroke of the hydraulic cylinders to ensure smooth turning, then the turning process is stable and controlled, but the turning time is increased due to bidirectional damping
Solution Approach 1:
The hydraulic stroke is segmented into two distinct phases: a first stroke from the working position to the intermediate position, and a second stroke from the intermediate position to the working position. Different damping characteristics are applied to each phase, allowing the first stroke to be undamped for speed while the second stroke remains damped for stability.
Solution Approach 2:
The damping characteristic of the hydraulic system is made dynamic rather than static. The bypass valve dynamically changes the flow path based on the direction of the stroke, automatically switching between undamped and damped conditions without requiring manual intervention or complex control systems.
2Device complexity
If the same damping is used for both directions of the hydraulic stroke, then the system is simple to control, but the turning process is prolonged due to bidirectional damping
Solution Approach 1:
A bypass valve is introduced as an intermediary component in parallel with the damping element. This bypass valve acts as a mediator that selectively opens or closes to redirect hydraulic flow, enabling undamped operation during the first stroke while maintaining damped operation during the second stroke through simple directional control.
3Speed
If the hydraulic cylinder moves at increased speed during the first stroke, then the turning process is accelerated, but shocks may be introduced into the turning mechanism
Solution Approach 1:
The system applies hydraulic damping in advance during the second stroke when the plow frame weight bears on the hydraulic cylinder. This pre-established damping mechanism cushions the system against shocks by being ready to engage when needed, rather than attempting to prevent shocks during high-speed undamped operation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach accelerates the turning process without additional stress on the slewing gear or plow frame, improving efficiency by allowing faster lifting without shocks and controlled damping during weight-bearing phases.
Implementation Method 1
the bypass is configured to direct pressurized hydraulic fluid parallel to the respective end-position damping into at least one chamber of the hydraulic cylinders
Implementation Method 2
the stroke of the hydraulic cylinders used to lower the plough frame from the intermediate position to the working position is usually hydraulically damped. Hydraulic damping of this stroke throttles the volume flow
Implementation Method 3
the check valve is designed to block the bypass during the lifting path in order to lower the plough frame from the intermediate position into the working position and to release the bypass during the lifting path
Implementation Method 4
Hydraulic damping of this stroke throttles the volume flow, particularly the outflowing flow, so that the hydraulic cylinder moves at a reduced speed
Data Source
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AI summary
A semi-mounted reversible plow (1) with a slewing mechanism (2) by means of which a plow frame (3) supporting two rows of plow bodies (4a, 4b) opposite each other is rotatable about a horizontal turning axis (W), wherein the slewing mechanism (2) has at least a first hydraulic cylinder (5a) and a second hydraulic cylinder (5b) for rotating the plow frame (3) about the turning axis (W) into the respective working position, wherein the hydraulic cylinders (5a, 5b) are arranged in a single-acting manner on the slewing mechanism (2) such that, for rotating the plow frame (3) from one working position to the opposite working position, first the first hydraulic cylinder (5a) is operatively connected to the slewing mechanism (2) and then the second hydraulic cylinder (5b) is operatively connected to the slewing mechanism (2), wherein the stroke (H1) of the hydraulic cylinders (5a, 5b) to lower the plow frame (3) from the intermediate position into the working position is hydraulically damped.In order to create a semi-mounted reversible plow (1) with an improved slewing mechanism (2) which eliminates in particular the disadvantages known in the prior art, it is provided that the semi-mounted reversible plow (1) includes at least one bypass (10), wherein the stroke (H2) of the hydraulic cylinders (5a, 5b) around the plow frame (3) from the working position to the intermediate position is undamped by means of the bypass (10).