EP3383543A1 - Verfahren zur einstellung eines brechspalts - Google Patents
Verfahren zur einstellung eines brechspaltsInfo
- Publication number
- EP3383543A1 EP3383543A1 EP16805114.2A EP16805114A EP3383543A1 EP 3383543 A1 EP3383543 A1 EP 3383543A1 EP 16805114 A EP16805114 A EP 16805114A EP 3383543 A1 EP3383543 A1 EP 3383543A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure
- rotor
- baffle
- hydraulic actuator
- impact
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
- B02C13/02—Disintegrating by mills having rotary beater elements ; Hammer mills with horizontal rotor shaft
- B02C13/06—Disintegrating by mills having rotary beater elements ; Hammer mills with horizontal rotor shaft with beaters rigidly connected to the rotor
- B02C13/09—Disintegrating by mills having rotary beater elements ; Hammer mills with horizontal rotor shaft with beaters rigidly connected to the rotor and throwing the material against an anvil or impact plate
- B02C13/095—Disintegrating by mills having rotary beater elements ; Hammer mills with horizontal rotor shaft with beaters rigidly connected to the rotor and throwing the material against an anvil or impact plate with an adjustable anvil or impact plate
Definitions
- the invention relates to a method for adjusting a crushing gap of a comminuting device, in particular an impact crusher, and a comminuting device.
- Crushing devices such as impact crushers, are used for crushing crushed material, in particular rock or ores.
- an impact crusher the crushed material is comminuted in a crushing gap formed between baffle plates and a rotor equipped with blow bars.
- the circumferentially mounted on the rotor blow bars, as well as the baffles are exposed during operation of the crushing device high wear, so that increases the crushing gap with progressing wear.
- the baffle on which the baffles are mounted by means of a hydraulic ikaktuators relative to the rotor movable so that the crushing gap and thus a desired grain size of the material to be crushed is adjustable.
- DE 195 1 1 097 C1 It is also known from DE 195 1 1 097 C1 to adjust the crushing gap of a crushing device by first determining the zero position at which the blow bars touch the baffle plates and the crushing gap assumes a value of zero. This zero position is determined in DE 195 1 1 097 C1 by the impact mechanism is moved in the direction of the rotating rotor until they touch the blow bars. The vibrations of the impact mechanism are measured and the zero position is identified when a predefinable vibration threshold value is exceeded.
- the invention comprises a method for adjusting a breaking gap of a comminution device, in particular an impact crusher, wherein the comminution device comprises a rotor rotatable about its center axis with collision elements arranged peripherally thereon and an impact mechanism movably mounted relative to the rotor by means of a hydraulic actuator.
- the hydraulic actuator is connected to an adaptive pressure limiting valve and a crushing gap is formed between the impact mechanism and the impact elements.
- step f moving the impact mechanism in the opposite direction to step b), so that a desired crushing gap is set.
- the zero position is determined in particular first.
- the zero position is the position of the baffle in which the baffle contacts at least one baffle element of the rotor, so that the crushing gap assumes a value of zero in this position.
- the crushing gap is adjusted, wherein the impact mechanism is moved away from the rotor, so that the desired crushing gap is set.
- one of the baffles in rotation of the rotor touches the baffle, in particular, the baffle is subjected to a striking force, resulting in a pressure increase in the hydraulic actuator.
- the hydraulic actuator has a hydraulic cylinder with a piston arranged movably therein.
- the piston divides the hydraulic cylinder into two chambers and is connected at one end to the impact mechanism, so that a movement of the piston results in a movement of the impact work. If pressure is applied to the cylinder chamber facing away from the impact mechanism, the impact mechanism moves in the direction of the rotor. In the zero position, in particular, the cylinder chamber facing away from the impact mechanism is subjected to a pressure.
- the impact elements are, for example, blow bars, crusher teeth or hammer tools, which are mounted circumferentially on a rotor.
- the hydraulic actuator is in particular connected to a pressure measuring device which determines the pressure profile in the cylinder chambers of the hydraulic cylinder over time.
- the pressure profile determined with the pressure measuring device is transmitted to the adaptive pressure limiting valve.
- the adaptive pressure relief valve preferably has a valve threshold corresponding to a predetermined differential pressure at the adaptive pressure relief valve. Upon reaching the valve threshold, the adaptive pressure relief valve is moved to an open position in which hydraulic fluid flows through the adaptive pressure relief valve and the pressure on the hydraulic actuator, particularly in the cylinder chamber facing away from the impactor, is reduced.
- the adaptive pressure limiting valve is preferably designed such that the valve threshold value adjusts as a function of the pressure at the hydraulic actuator, in particular in the cylinder chambers.
- the adaptive pressure limiting valve has in particular at least two surfaces which are pressurized.
- the first surface is acted upon by the pressure applied to the hydraulic actuator, in particular in the cylinder chamber facing away from the impact mechanism, wherein the second surface is acted upon by a reference pressure, in particular the pressure applied by means of a hydraulic pump of the hydraulic system.
- a reference pressure in particular the pressure applied by means of a hydraulic pump of the hydraulic system.
- the valve threshold is about 5 - 10 bar, in particular 7 bar, so that the adaptive pressure relief valve is moved to the open position when the pressure at the hydraulic actuator about 5-10 bar, in particular 7 bar higher than the reference pressure.
- the reference pressure is preferably independent of the achievement of the zero position of the impact mechanism, so that it does not change at all by a blow to the baffle or only by the subsequent opening of the adaptive pressure relief valve.
- the adaptive pressure limiting valve has, for example, a spring of variable spring constant, via which the valve threshold value can be set.
- the spring acts on the adaptive pressure limiting valve in the direction of the closed position.
- step d) of adjusting the adaptive pressure relief valve valve threshold at which the adaptive pressure relief valve moves to an open position in response to the pressure at the hydraulic actuator allows the valve threshold to be approached upon movement of the impactor towards the rotor The zeroing is prevented, although the pressure in the actuator, for example, rises slightly.
- the gradient threshold value according to step e) is exceeded, in particular by about 5 bar / sec, the valve threshold value is reached and the adaptive pressure relief valve is opened.
- the valve threshold is adjusted such that the adaptive pressure relief valve is in the closed position when the pressure curve of the hydraulic actuator falls below the gradient threshold and the adaptive pressure relief valve is in the open position when the pressure curve of the hydraulic actuator exceeds the gradient threshold.
- the position of the impact mechanism is determined according to a first embodiment over time and from this the position of the impact mechanism is determined in the zero position detected in step e).
- the step f) of moving the impactor away from the rotor is carried out in response to the determined position of the impact mechanism in the zero position, so that a desired crushing gap is set relative to the determined zero position.
- the determination of the position of the baffle in the zero position offers the possibility of adjusting the crushing gap with respect to the zero position.
- step f) takes place after the first contact of the impact mechanism with a baffle element of the rotor, so that the impact mechanism and the baffle element have exactly one contact.
- the gradient threshold value of the pressure rise in the actuator has a value of about 3-8 bar / sec, in particular about 4-6 bar / sec, preferably about 5 bar / sec.
- the zero position of the impact mechanism is detected when the slope of the pressure curve on the actuator exceeds the gradient threshold value for a period of ⁇ 1 second.
- the invention further comprises a shredding device comprising a rotatable about its central axis rotor with circumferentially arranged thereon baffle elements, a baffle, which is movably mounted by means of a Hydraulikaktuators relative to the rotor, formed between the baffle and the baffles crushing gap and a pressure measuring device for determining the Pressure curve in the hydraulic actuator, wherein the hydraulic actuator is connected to an adaptive pressure relief valve.
- the adaptive pressure relief valve is connected to the pressure measuring device.
- the pressure measuring device transmits, in particular, the determined pressure curve on the hydraulic actuator to the adaptive pressure limiting valve, so that, for example, the valve threshold value is set in accordance with the determined pressure.
- the adaptive pressure relief valve is opened or closed as a function of the determined pressure curve.
- the adaptive pressure limiting valve is configured such that the valve threshold value at which the adaptive pressure limiting valve moves into an open position adjusts in dependence on the pressure, in particular the pressure curve in the hydraulic actuator.
- the valve threshold is according to another embodiment in about 5- 10 bar, in particular 7 bar.
- the comminution device comprises a path measuring device for determining the position of the impact work and a control device for controlling the hydraulic actuator, which is designed such that it ascertains the slope of the pressure profile and detects a zero position of the impact work, in which the impact work is a baffle element of the rotor when the adaptive pressure relief valve is moved to the open position or when the slope of the pressure in the hydraulic actuator exceeds the gradient threshold.
- the hydraulic actuator has according to a further embodiment, a hydraulic cylinder and a piston arranged therein, wherein the piston is connected to the baffle and the displacement measuring device is attached to the piston.
- the pressure measuring device is arranged according to a further embodiment such that it determines the pressure in the cylinder chamber of the hydraulic actuator facing away from the impact mechanism.
- FIG. 1 shows a schematic representation of a crushing device according to an embodiment.
- FIG. 2 shows a diagram of a pressure curve on a hydraulic cylinder of the comminution device according to FIG. 1.
- FIG. 1 shows a comminuting device 10, in particular an impact crusher, having a rotor 14 and an impact work 12.
- the rotor 14 is substantially cylindrical and rotatable about its central axis.
- the rotor 14 On its lateral surface, the rotor 14 has a plurality of circumferentially arranged impact elements 16.
- impact elements 16 are impact strips.
- the baffles 16 are arranged in a radial recess in the lateral surface of the rotor 14 and extend in the radial direction to about half of their length from the rotor 14 out. The direction of rotation is indicated by an arrow in FIG.
- the baffle 12 is disposed adjacent to the rotor 14 and has a plurality of baffles 34 which are arranged facing in the direction of the rotor 14. Between the baffles 34 of the baffle 12 and the baffles 16 of the rotor 14, a crushing gap 38 is formed.
- the baffles 34 of the baffle 12 are arranged one behind the other in the rotational direction, wherein the distance of the baffles 34 reduced to the blow bars 16 of the rotor 14 in the rotational direction until the lowest in Fig. 1 of the baffles 34 with the rotating baffles 16, the crushing gap 38 is formed.
- the baffle 12 is rotatably mounted about a pivot axis 32 so that the baffles 34 can be aligned relative to the rotor 14.
- Impingement 12 arranged on the pivot axis 32 with a hydraulic actuator 18 in the direction of the rotor 14 movable.
- the hydraulic actuator 18 has a hydraulic cylinder 40 with a piston 20 movable therein, which divides the hydraulic cylinder 40 into two cylinder chambers.
- the piston 20 is attached at its one end to the baffle 12 and has a displacement measuring device 22 for detecting the movement of the piston 20 in the hydraulic cylinder 40.
- a pressure measuring device 24 is further attached, the pressure in the baffle 12th determined cylinder chamber of the actuator.
- the actuator 18 is connected to an adaptive pressure limiting valve 26. Furthermore, the actuator 18 is connected via a directional control valve 42 to a hydropump 30.
- a pilot-operated check valve 27 is arranged between the directional control valve 42 and the adaptive pressure relief valve 26 between the directional control valve 42 and the adaptive pressure relief valve 26.
- the check valve 27 prevents hydraulic flow from the adaptive pressure relief valve 26 back to the directional control valve 42.
- the check valve 27 Upon reaching a predetermined pressure in the line B from the hydraulic actuator 18 to the directional control valve 42, the check valve 27 is unlocked.
- the adaptive pressure relief valve 26 has a movable piston comprising four surfaces A, B, AP and BP.
- the surfaces A and B point in the direction of the lines connected to the hydraulic actuator, the surfaces AP and BP pointing in the direction of a control line shown in broken lines, which leads from the adaptive pressure relief valve to the line between the directional control valve 42 and the pump 30.
- the area AP minus the area BP corresponds approximately to the area A together with the area B.
- the area AP is acted upon by a spring in the direction of the closed position.
- the rotor 14 rotates in the direction of the arrow, wherein crushing material is fed onto the rotor 14, which are thrown by the rotation of the rotor 14 against the baffle plates 34 of the baffle 12.
- the baffle 12 is moved in the direction of the rotor 14 or away from the rotor 14.
- the directional control valve 42 is moved to the position shown on the left, in which the directional control valve 42 is opened, so that hydraulic fluid is pressed into the impact mechanism 12 remotely located cylinder chamber of the actuator 18 via the pump 30, whereby the piston 20 in the direction of the rotor 14 moves and the crushing gap 38 is reduced.
- the directional control valve 42 is moved to the right in Fig. 1 position in which the valve is opened so that the supply and return line are crossed, so the piston 20 is moved in the direction away from the rotor 14. In the valve position shown in Fig. 1, the piston 20 is not moved.
- the pressure relief valve 26 is connected to both cylinder chambers of the actuator 18. If the pressure at the pressure limiting valve 26 exceeds a predetermined valve threshold value, the pressure limiting valve 26 opens and the hydraulic fluid flows from line A via the open seat of the pressure limiting valve into the line B.
- the valve threshold value of the pressure limiting valve 26, from which the pressure relief valve 26 opens, depends on the on the hydraulic actuator 18, applied pressure. If the same pressure acts on the hydraulic actuator 18 and the control line connected to the pump 30, an equilibrium of forces is applied to the surfaces A, B, AP and BP of the cylinder of the adaptive pressure limiting valve 26, so that the piston is moved into the closed position by the spring is charged.
- the applied pressure in the control line is also referred to as the reference pressure.
- the valve threshold is determined by the spring force, so that it is always higher by the spring force than the voltage applied to the hydraulic actuator pressure.
- the valve threshold value is, for example, approximately 5 to 10 bar, in particular 7 bar, higher than the pressure applied to the actuator 18.
- the pressure in the actuator 18 rises sharply due to a blow on the impact device 12 connected to the piston 20, the surface A is subjected to a higher pressure than the areas AP and BP acted upon by the pressure of the pump 30.
- the pressure on surface B is preferably very low or almost zero. If this pressure difference exceeds the spring force, the adaptive pressure relief valve 26 is moved to an open position.
- the rotor 14 is rotated about its axis of rotation, wherein during the adjustment of the crushing gap no material to be crushed is fed into the crushing gap.
- the pump 30 is started and the Directional valve 42 moves in the left, parallel position, so that the impact mechanism 12 facing away from the cylinder chamber is pressurized and the piston 20 moves at approximately constant speed in the direction of the rotor 14.
- a throttle check valve 29 is arranged, via which the speed of the piston 20 is adjusted, so that the piston 20 is moved at a constant speed in the direction of the rotor 14.
- another pressure limiting valve 36 is arranged parallel to the throttle check valve 29.
- a buffer 28 serving as a buffer 28 is arranged between the pump 30 and the throttle check valve 29.
- the pressure measuring device 24 determines the pressure on the actuator 18, in particular in the cylinder chamber facing away from the baffle 12, over time, wherein the displacement measuring device 22 determines the position of the piston 20 over time.
- the pressure in the actuator 18 increases such that the adaptive pressure relief valve 26 opens so that the piston 20 moves in an opposite direction away from the rotor 14.
- the time of contact between the baffle plate 34 of the baffle 12 is determined with the blow bar 16.
- the position of the zero position of the baffle 12 is determined by means of the determined by the path measuring device 22 position of the piston 20 at the time of pressure rise. If the slope of the pressure curve exceeds a certain gradient threshold, the zero position of the impact mechanism 12 is detected. The zero position is also detected, for example, when the adaptive pressure relief valve 26 is moved to the open position.
- FIG. 2 shows the pressure profile determined with the pressure measuring device 24 during the method for adjusting the crushing gap 38, wherein the impact mechanism 12 is moved in the direction of the rotor 14 while the rotor 14 rotates about its axis of rotation. With the solid line, the pressure on the actuator 18, in particular in the cylinder chamber facing away from the baffle 12, shown over time. The broken line shows the valve threshold set on the adaptive pressure relief valve 26 over time.
- the displacement sensor detects the position of the piston 20 in the hydraulic cylinder 40 over time.
- the pump 30 is turned on, while the directional control valve 42 is in the locked position shown in Fig. 1 and the Pressure in the actuator 18 is constant.
- the directional control valve 42 is moved to the parallel position, so that the cylinder chamber facing away from the baffle 12 is pressurized and the piston 20 moves at approximately constant speed in the direction of the rotor 14.
- the pressure on the actuator 18, in particular in the cylinder chamber facing away from the baffle 12 increases approximately linearly, wherein the slope is for example about 2-3 bar per second.
- the valve threshold value of the adaptive pressure limiting valve 26 runs approximately parallel to the pressure curve of the actuator 18, wherein the valve threshold value is higher by about 5 bar than the actuator pressure.
- the increase in pressure in the actuator 18 is due to, for example, that the baffle 12 is raised against gravity.
- one of the baffles 16 touches a baffle plate 34 of the baffle 12 and the pressure curve has a slope which is significantly greater than the slope of the pressure curve during movement of the baffle 12 in the direction of the rotor 14.
- the slope is about 100 bar per second.
- the pressure on the actuator 18 rises to a value of about 70 bar, wherein the valve threshold of the adaptive pressure relief valve 26 is exceeded and the pressure relief valve 26 is opened, so that the piston 20 moves in the opposite direction away from the rotor 14.
- the pressure in the actuator 18 decreases to a value that approximately corresponds to the output pressure value in the actuator 18, wherein the pressure limiting valve 26 is closed and has a threshold which is higher than the actuator pressure by about 5 bar.
- the pressure on the actuator 18 increases significantly when touching one of the baffle elements 16 with a baffle plate 34, so that the time of contact of the beater bar 16 with the baffle plate 34 is clearly determined from the pressure curve.
- the time of contact 1 is 1 second.
- a contact between one of the blow bars 16 is detected with a baffle plate 34 when the pressure increase of the actuator pressure exceeds a predetermined value.
- this gradient threshold is about 5 bar / sec.
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Crushing And Pulverization Processes (AREA)
- Disintegrating Or Milling (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102015224104.1A DE102015224104A1 (de) | 2015-12-02 | 2015-12-02 | Verfahren zur Einstellung eines Brechspalts |
| PCT/EP2016/079436 WO2017093407A1 (de) | 2015-12-02 | 2016-12-01 | Verfahren zur einstellung eines brechspalts |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3383543A1 true EP3383543A1 (de) | 2018-10-10 |
| EP3383543B1 EP3383543B1 (de) | 2019-04-24 |
Family
ID=57460516
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP16805114.2A Active EP3383543B1 (de) | 2015-12-02 | 2016-12-01 | Verfahren zur einstellung eines brechspalts |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP3383543B1 (de) |
| DE (1) | DE102015224104A1 (de) |
| DK (1) | DK3383543T3 (de) |
| ES (1) | ES2730823T3 (de) |
| WO (1) | WO2017093407A1 (de) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115638611A (zh) * | 2022-11-08 | 2023-01-24 | 四川味欣食品科技有限公司 | 一种覆盆子调味剂及其制备方法与生产装置 |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109865558B (zh) * | 2019-04-01 | 2020-12-04 | 来凤县雷沃德矿业有限公司 | 一种矿石原料分级粉碎处理装置 |
| DE102020114106B4 (de) * | 2020-05-26 | 2024-03-28 | Kleemann Gmbh | Brecher |
| CN112246331B (zh) * | 2020-09-30 | 2021-11-02 | 神木市众邦煤化有限公司 | 一种可防粉尘弥漫的煤炭加工用粉碎装置 |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3709504C2 (de) * | 1987-03-23 | 1995-02-02 | Rexroth Mannesmann Gmbh | Ventileinrichtung |
| DE4440076C1 (de) * | 1994-11-10 | 1996-04-04 | Noell Serv & Maschtechn Gmbh | Prallbrecher mit hydraulischer Verstellung des den Zerkleinerungsgrad bestimmenden Mahlspaltes |
| DE19511097C1 (de) | 1995-03-25 | 1996-07-11 | Krupp Foerdertechnik Gmbh | Verfahren zur automatischen Einstellung des Mahlspaltes einer Zerkleinerungsmaschine und Zerkleinerungsmaschine |
| DE29505133U1 (de) * | 1995-03-25 | 1996-07-25 | Krupp Fördertechnik GmbH, 47226 Duisburg | Zerkleinerungsmaschine |
| DE102007022236B4 (de) * | 2007-05-09 | 2010-01-14 | Hazemag & Epr Gmbh | Prallmühle |
-
2015
- 2015-12-02 DE DE102015224104.1A patent/DE102015224104A1/de not_active Ceased
-
2016
- 2016-12-01 WO PCT/EP2016/079436 patent/WO2017093407A1/de not_active Ceased
- 2016-12-01 DK DK16805114.2T patent/DK3383543T3/da active
- 2016-12-01 ES ES16805114T patent/ES2730823T3/es active Active
- 2016-12-01 EP EP16805114.2A patent/EP3383543B1/de active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115638611A (zh) * | 2022-11-08 | 2023-01-24 | 四川味欣食品科技有限公司 | 一种覆盆子调味剂及其制备方法与生产装置 |
| CN115638611B (zh) * | 2022-11-08 | 2024-03-22 | 四川味欣食品科技有限公司 | 一种覆盆子调味剂及其制备方法与生产装置 |
Also Published As
| Publication number | Publication date |
|---|---|
| DK3383543T3 (da) | 2019-07-15 |
| ES2730823T3 (es) | 2019-11-12 |
| EP3383543B1 (de) | 2019-04-24 |
| WO2017093407A1 (de) | 2017-06-08 |
| DE102015224104A1 (de) | 2017-06-08 |
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