• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The rotary piston machine for the compression or decompression of gases is of the type with a stationary inner working space wall (3) and a resting outer working space wall (2) and has a rotor (10) with a plurality of central pistons (1) which are centrally symmetrical with respect to their axes of rotation. These rotate at half the angular speed of the rotor (10). The working space walls (2, 3) are shaped so that the gap widths between them and the rotary piston (1) are as small as possible. The number and width of the rotary piston (1) can be selected so that at the bottleneck (7) between the compression chamber (5) and suction (6) always enters a rotary piston when the predecessor has left the bottleneck. Furthermore, the thickness of the rotary piston can be selected as a function of the distance to the axis of rotation so that a rotary piston can close the constriction (7), as long as he protrudes into it.
    公开号:CH710546A2
    申请号:CH02000/14
    申请日:2014-12-19
    公开日:2016-06-30
    发明作者:Zumbrunn Werner
    申请人:Zumbrunn Werner；
    IPC主号:
    专利说明:

    The invention relates to a machine with which gases can be compressed with the supply of mechanical power.
    Machines for the compression of gases have long been known and there are a large number of variants. Piston engines are widespread. They have pistons that move in cylinders and that move back and forth. In the cylinder head are at least one inlet and one outlet valve for the inlet resp. Outlet of the gas available. Such machines can be used for the compression of gases by appropriate control of the valves, synchronized with the increasing and decreasing cylinder volume. Large densities can thus be achieved.
    Large machines, usually as parts of gas turbines, are designed as flow machines. They consist of a system of stationary guide vanes and a system of rotating blades, through which the mechanical power for the compression of the gas is supplied. They are characterized by a good power-to-weight ratio and smooth running. However, due to the large number of elaborately shaped guide and rotor blades, production is expensive.
    [0004] There is a large number of rotary piston or rotary piston machines for the area of smaller powers. With embodiments in which all movable elements rotate exclusively uniformly, high speeds and a high gas throughput can be achieved with low weight because of the freedom from vibration that can be achieved thereby.
    The well-known inventor Felix Wankel has made a "classification of rotary piston machines" in one of his books. What is commonly referred to as a "Wankel engine" is, according to Wankel, an "inner-axis design" with an "external, stationary workspace wall." In addition to a large number of “external axis designs”, Wankel also lists a single design that is neither “internal axis” nor “external axis”: He describes it as a design with “external and internal stationary work space walls” in which the rotary pistons are in “slip engagement” Counter-intervention '. With this design, all moving components rotate uniformly, with the resulting advantages. However, from Wankel's description it can be seen that at the narrow point where the rotary pistons pass from the compression chamber into the intake chamber, a tightness cannot even come close. In addition, in addition to the rotary pistons, the rotor also has rigid auxiliary elements which limit the compression ratio. Furthermore, the work space walls do not have a shape that ensures tightness between the rotary pistons and the work space walls.
    The invention now shows how in a rotary piston machine of the type "outer and inner stationary work space walls", in which the rotary pistons are in "slip engagement and counter-engagement", tightness on the one hand and higher compression ratios on the other hand can be achieved. Since sealing strips between the rotary piston and the working space walls are not possible in such machines, more or less large leakage losses must always be expected. The machines, which run vibration-free at high speeds, are therefore particularly suitable for applications in which the gas throughput is high and the compression ratio is low.
    In the following, the invention is explained on the basis of advantageous embodiments. Drawing 1 shows Wankel's sketch of a rotary piston machine in a design with "outer and inner stationary work space walls." Drawing 2 shows a rotary piston machine in which the rotary piston and the working space walls are optimally designed. Drawing 3 is used to calculate the optimal piston width. Drawing 4 shows the details in the area of the constriction between the compression and intake space, especially the special shape of the rotary pistons with which tightness is achieved between the compression and intake space. Drawing 5 shows a drive variant for the rotary pistons. Drawing 6 shows a rotary piston machine according to the invention with four rotary pistons.
    [0008] Drawing 1 includes Wankel's sketch of a rotary piston machine with "outer and inner stationary work space walls." The drawing shows that in this type of rotary piston machine the rotary piston (1) rotate at exactly half the angular speed of the rotor (10). The elements (4) which are fixed relative to the rotor (10) make it impossible to achieve a greater compression ratio. The stationary work space outer wall (2) and the stationary work space inner wall (3) should be designed so that as little as possible between the rotary piston (1) and the walls (2, 3) and in the narrow part (7) between the compression space (5) and the intake space (6) Gas can pass through, respectively. that the leakage losses are as small as possible. It is not clear from Wankel's sketch how this could be achieved.
    Drawing 2 shows the basic structure of a rotary piston machine according to the invention with a total of eight rotary pistons (1), with the outer wall of the working space (2) and the inner wall of the working space (3). The walls are shaped so that the gap widths between them and the rotary piston (1) are as small as possible. The gap widths are of course the smaller the more precise the mechanics. The lack of fixed elements with respect to the rotor (10) enables a greater compression ratio. The number and shape of the rotary pistons are chosen so that a rotary piston always enters the constriction (7) between the compression chamber (5) and the intake chamber (6) when the predecessor has left the constriction.
    With the help of drawing 3, the corresponding width of the rotary piston can be calculated. The situation is shown where a rotary piston is just leaving the constriction (7) and is immediately followed by the next rotary piston. The condition is as follows:
    a Width of the rotary pistons R Distance between the rotor center and axes of rotation of the rotary pistons N Total number of equidistant rotary pistons
    The drawing 4 shows in detail that each of the identical rotary piston (1) must have a thickness d that decreases with the distance from the rotary piston axis x, so that the rotary piston (1) the narrow point (7) between the compression chamber (5) and the suction chamber ( 6) can close completely.
    x Distance from the rotary piston axis d (x) Thickness of the rotary piston as a function of the distance from the rotary piston axis R Distance between the rotor center and the axes of rotation of the rotary piston
    As already mentioned above, the rotary pistons must rotate exactly and synchronously with half the angular speed of the rotor (10). One possibility is to drive the rotary pistons via precise gear transmissions, these transmissions in turn being driven by the rotor shaft. The smaller the gap widths between the rotary piston (1) and the walls (2, 3) have to be - especially in order to keep the leakage losses small at higher compression ratios - the higher the demands on the gearbox and the higher their costs. An alternative is to dispense with such a transmission and merely to connect the drives of the rotary pistons to one another. This is only possible because the rotary pistons are symmetrical, consequently no torque is exerted on them in total and therefore no drive power has to be applied.
    If the rotary pistons are connected to each other via a chain or a toothed belt, after a short time the entirety of the rotary pistons will move synchronously and without great friction within the walls (2, 3) if the gap widths are selected correctly according to the precision of the mechanics will.
    If the rotary pistons are connected via non-positive drives, for example toothless flat belts, or via non-positive gears, then each rotary piston can position itself during run-up so that the friction with the walls is successively lower. The requirements for the precision of the mechanics can thus be further reduced compared to the solution with form-fitting drives. The drawing 5 shows a drive according to the invention for the rotary piston. A belt pulley (9) of the same size sits on all axes of the rotary pistons. They are connected to one another via a flat belt (8).
    The greater the number of rotary pistons (1), the more the cross-sections of the outer wall and inner wall of the working space assume a circular shape and the easier it is to manufacture - but with increasing effort for the rotary piston. However, the opposite approach can also be taken: reducing the number of rotary pistons to the minimum; instead, the shapes of the outer and inner walls of the workspace become more complicated. In order to comply with the condition that no torque is exerted on the rotary pistons due to pressure differences, the number of rotary pistons must be at least three.
    In the drawing 6, a rotary piston machine with four rotary pistons (1) is shown. The compression chamber (5) and the suction chamber (6) are chosen so that in the ideal case - no leakage losses - the maximum volume compression ratio of approx. 1.4 is achieved. The cross-sections of the workspace outer wall (2) and inner wall (3) deviate significantly from the circular shape. This drawing also clearly shows how the gas inlet (11) and outlet (12) were chosen: When the volume between two consecutive rotary pistons has reached the maximum, the rear rotary piston intersects the suction chamber (6) with the gas inlet ( 11) depends on this volume. After rotating the rotor (10) by 90 degrees, the volume between the two rotary pistons has decreased by approx. 30%. Then the front rotary piston releases the volume opposite the compression chamber (5) with the gas outlet (12).
    The rotary piston machine according to the invention can be used not only for the compression of gases, but also for the decompression of gases in order to gain mechanical power.
    权利要求:
    Claims (3)
    [1]
    1. Rotary piston machine for the compression or decompression of gases, with a rotor having a plurality of centrally symmetrical with respect to their axes of rotation circular piston rotating at half the angular velocity of the rotor, with resting inner and stationary outer Arbeitsraumwandung, wherein these are shaped so that the rotary piston Move along them, with the following feature: The width of the rotary piston is chosen so that at any time a rotary piston protrudes into the narrowest point between the compression and suction.
    [2]
    2. Rotary piston machine according to claim 1, characterized in that the rotary piston, which projects straight into said constriction, this can close at any time, which requires a distance from the axis of rotation decreasing thickness.
    [3]
    3. Rotary piston machine according to claim 1 or 2, characterized in that the drives of said rotary piston are connected solely by means acting between them, either positive or non-positive.
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    同族专利:
    公开号 | 公开日
    CH710546B1|2019-05-31|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    2021-07-30| PL| Patent ceased|
    优先权:
    申请号 | 申请日 | 专利标题
    CH02000/14A|CH710546B1|2014-12-19|2014-12-19|Rotary piston engine for the compression or decompression of gases.|CH02000/14A| CH710546B1|2014-12-19|2014-12-19|Rotary piston engine for the compression or decompression of gases.|
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