阅读说明：本技术 辊组件、碾磨装置和用于调节碾磨装置的碾磨间隙的方法 (Roller assembly, milling device and method for adjusting the milling gap of a milling device ) 是由 D·费舍尔 D·里肯巴赫 于 2019-07-09 设计创作，主要内容包括：本发明尤其涉及用于碾磨装置(70)的辊组件,包括由至少一个第一轴承体(13)保持的第一辊和由至少一个第二轴承体(14)保持的第二辊,所述第一轴承体(13)和所述第二轴承体(14)借助调节装置(15)能够彼此相对调节,使得能够调节在所述第一辊和所述第二辊之间形成的碾磨间隙。所述调节装置(15)包括机械式增力器(30),其具有输入构件(31)、输出构件(32)和具有接触表面(34,36,45,46)的增力器构件(33,35,47)。接触表面(34,36,45,46)彼此配合,使得所述第一增力器构件(33)在轴向(A)上的移动导致所述第二增力器构件(35)在横向(Q)上的移动,这导致所述输出构件(32)在轴向(A)上的移动。本发明还涉及具有这种类型的辊组件的碾磨装置(70)和用于调节这种类型的辊组件的碾磨间隙的方法。(The invention relates in particular to a roller assembly for a milling device (70), comprising a first roller held by at least one first bearing body (13) and a second roller held by at least one second bearing body (14), the first bearing body (13) and the second bearing body (14) being adjustable relative to one another by means of an adjusting device (15) such that a milling gap formed between the first roller and the second roller can be adjusted. The adjustment device (15) comprises a mechanical booster (30) having an input member (31), an output member (32) and a booster member (33,35,47) with a contact surface (34,36,45, 46). The contact surfaces (34,36,45,46) cooperate with each other such that movement of the first force multiplier member (33) in the axial direction (a) causes movement of the second force multiplier member (35) in the transverse direction (Q), which causes movement of the output member (32) in the axial direction (a). The invention also relates to a milling device (70) having a roller assembly of this type and a method for adjusting the milling gap of a roller assembly of this type.)

1. A roller assembly (10) for a milling device (70), comprising a first roller (11) held by at least one first bearing body (13) and a second roller (12) held by at least one second bearing body (14), wherein the first bearing body (13) and the second bearing body (14) are adjustable relative to each other by means of an adjusting device (15) such that a milling gap formed between the first roller (11) and the second roller (12) is adjustable, characterized in that the adjusting device (15) comprises a mechanical force booster (30) having:

-an input member (31) for adding input force to the force multiplier (30),

-an output member (32) coupled to the second bearing body (14) for adding an output force into the second bearing body (14),

-at least one first force multiplier member (33) formed by or coupled with the input member (31), displaceable in an axial direction (A) and having at least one first contact surface (34),

-at least one second force multiplier member (35) displaceable in a transverse direction (Q) different from the axial direction (A) and having at least one second contact surface (36) and at least one third contact surface (45) with which it abuts the first contact surface (34) of the first force multiplier member (33),

-at least one third force multiplier member (48) formed by or coupled with the output member (32), which third force multiplier member is displaceable in the axial direction (A) and has at least one fourth contact surface (46), with which it abuts the third contact surface (45) of the second force multiplier member (35),

wherein the contact surfaces (34,36,45,46) are matched to each other such that a movement of the first force multiplier member (33) in the axial direction (A) causes a movement of the second force multiplier member (35) in the transverse direction (Q) and this causes a movement of the output member (32) in the axial direction (A).

2. A roller assembly (10) according to claim 1, wherein the first bearing body (13) is immovably mounted relative to a frame (71) of the milling device (70), the second bearing body (14) is movably, in particular rotatably, mounted relative to the frame (71), and wherein at least the booster member (33,35,47) of the booster (30) is arranged or integrated in one of the first bearing bodies (13) or one of the second bearing bodies (14), in particular in one of the first bearing bodies (13).

3. A roller assembly (10) according to any one of the preceding claims wherein said input member (31) and said output member (32) are arranged coaxially with one another.

4. A roller assembly (10) according to any one of the preceding claims wherein said first contact surface (34) and said second contact surface (36) extend at a first angle (a) with respect to the axial direction (a), said first angle being in the range of 10 ° to 45 °, preferably in the range of 15 ° to 20 °.

5. A roller assembly (10) according to any one of the preceding claims wherein said third contact surface (45) and said fourth contact surface (46) extend at a second angle (β) with respect to the axial direction (a), said second angle being in the range of 45 ° to 80 °, preferably in the range of 50 ° to 70 °.

6. A roller assembly (10) according to any one of the preceding claims wherein said input member (31) is formed by a first rotatable spindle (31) having an external thread at a first end (38) and said first force multiplier member (33) has an internally threaded axial bore (39) into which the external thread of said first spindle (31) is screwed.

7. A roller assembly (10) according to claim 6 wherein said first spindle (31) has a second end (41) opposite its first end (38), a hand wheel (42) being fixed to said second end (41), said first spindle (31) being rotatable by means of said hand wheel.

8. A roller assembly (10) according to any one of the preceding claims wherein said output member (32) is rotatably supported on said third force multiplier means (47).

9. A roller assembly (10) according to claim 8 wherein said third booster member (47) includes a pull plate (37) having an opening (48) through which said output member (32) extends, wherein said output member (32) has a radial projection (40) at a first end (59) with said radial projection (40) resting on said pull plate (37).

10. A roller assembly (10) according to any one of the preceding claims wherein said output member (32) is constituted as a second spindle (32) and has an external thread, in particular at a second end (60) opposite to the first end (59), and wherein said second bearing body (14) has an internally threaded nipple (44) into which the external thread of said second spindle (32) is screwed.

11. A roller assembly (10) according to any one of the preceding claims wherein at least one of the first to fourth contact surfaces (34,36,45,46) is formed as a flat surface or a tapered sleeve shape.

12. A roller assembly (10) according to any one of the preceding claims wherein said second force multiplier means (35) is cylindrical.

13. A roller assembly (10) according to any one of the preceding claims wherein said roller assembly (10) has a separation rod (51), said separation rod (51) being rotatably mounted on said first bearing body (13) via a first separation joint (52), and wherein said separation rod (51) has a guide surface (56), and said force booster (30) has a guide roller (57), along which said guide surface (56) rolls when said separation rod (51) rotates about said first separation joint (52).

14. A roller assembly (10) according to any one of the preceding claims wherein said roller assembly (10) includes at least one bearing adapter (50) and at least one spring member (58), wherein said bearing adapter (50) is resiliently mountable via said spring member (58) on a chassis (71) of said milling device (70) and said second bearing body (14) is rotatably and resiliently mountable on said chassis (71).

15. A milling device (70), in particular a roller mill (70), comprising a frame (71) and at least one roller assembly (10) according to one of the preceding claims, the roller assembly (10) being inserted or insertable into the frame (71).

16. A method for adjusting a grinding gap formed between the first roller (11) and a second roller (12) of a roller assembly (10) according to any one of the preceding claims, comprising the steps of: -adding an input force to the force multiplier (30) by means of the input member (31) to move the output member (32) of the force multiplier (30) and thereby add an output force to the second bearing body (14) and adjust the first bearing body (13) and the second bearing body (14) relative to each other.

Technical Field

The invention relates to a roller assembly, a milling device and a method for adjusting a milling gap of a milling device.

Background

For various industrial applications, different types of milling devices are used for milling particulate materials. These devices include, for example, roller mills, malt grain mills, feed mills and coffee mills. Such a milling device comprises one or more roller assemblies, each having at least two rollers held by bearing bodies. Between the rollers there is formed a grinding gap, which gap is adjustable in many roller assemblies, for example by means of bearing bodies which can be adjusted relative to one another.

The known roller assembly is basically constructed according to the same principle: the width of the grinding gap is reduced (i.e. "engaged") to the working gap by displacing the movably mounted roller by means of an adjusting device driven, for example, mechanically, pneumatically or electromechanically. In order to ensure optimum milling, the milling gap should also be adjustable during operation by means of an adjusting device, which is referred to as "fine adjustment". After the grinding rolls are dressed, they must be moved closer together, which is accomplished by "coarse tuning". Adjusting devices for setting the grinding gap are disclosed, for example, in EP0734770, EP0752272, DE19715210, WO2009/068921 and EP 2098110.

In order to be able to apply the force required to adjust the grinding gap, eccentric and lever designs are used in many known roller assemblies. However, these designs require considerable installation space. Furthermore, the position of the output member is not linearly related to the input member, which makes adjustment more difficult.

Disclosure of Invention

The problem underlying the present invention is to overcome the disadvantages known in the prior art. In particular, a roller assembly is provided by which the highest possible forces for setting the grinding gap are achieved, however, the measures for this purpose should only take up as little installation space as possible.

In a first aspect of the present invention, these and other problems are solved by a roller assembly for a milling device comprising a first roller held by at least one first bearing body and a second roller held by at least one second bearing body. The first bearing body and the second bearing body are adjustable relative to each other by means of an adjusting device, so that a grinding gap formed between the first roller and the second roller is adjustable.

According to the invention, the adjustment device comprises a mechanical booster comprising:

-an input member for adding an input force to the booster,

-an output member coupled to the second bearing body for adding an output force to the second bearing body,

at least one first force multiplier member formed by or coupled with the input member, axially displaceable and having at least one first contact surface,

-at least one second force multiplier member displaceable in a transverse direction different from the axial direction and having at least one second contact surface and at least one third contact surface, the second force multiplier member abutting the first contact surface of the first force multiplier member with the second contact surface,

-at least one third force multiplier member formed by or coupled with the output member, axially displaceable and having at least one fourth contact surface, the third force multiplier member abutting the third contact surface of the second force multiplier member with the fourth contact surface.

The contact surfaces cooperate with each other such that movement of the first force multiplier member in the axial direction causes movement of the second force multiplier member in the transverse direction and this causes movement of the output member in the axial direction.

A roller assembly with such a force booster can be particularly effective while at the same time space-saving enhancing the force required for adjusting the grinding gap. Furthermore, a linear dependency of the position of the output member on the position of the input member can be achieved in a simple manner, which simplifies the adjustment. Furthermore, the force booster can be produced with only few components and at low cost.

In order to prevent or at least reduce the disturbing moments occurring in the known solutions with eccentrics, it would be convenient to arrange the input member and the output member coaxially with each other. This can be achieved particularly easily by the design of the force booster according to the invention.

It is further advantageous if the first bearing body is mounted immovably relative to the frame of the grinding device, the second bearing body is mounted movably, in particular rotatably, relative to the frame, and at least a force booster component of the force booster is arranged or integrated in one of the first bearing bodies or in one of the second bearing bodies, in particular in one of the first bearing bodies. This makes a particularly space-saving design possible.

An effective force enhancement can be achieved if the at least one first contact surface and the at least one second contact surface extend at a first angle relative to the axial direction, which first angle is in the range of 10 ° to 45 °, preferably in the range of 15 ° to 20 °. For example, the first and/or second contact surfaces may be flat. It is also possible to have a plurality of first contact surfaces, each of which is flat, but not necessarily arranged parallel to each other. Furthermore, there may be a plurality of second contact surfaces, each of which is flat, but not necessarily arranged parallel to each other. The first and/or second contact surface can also be designed in the shape of a taper sleeve. For example, the first contact surface may form an outer cone and the second contact surface may form an inner cone, or vice versa.

Furthermore, an effective force enhancement can be achieved if the third contact surface and the fourth contact surface extend at a second angle with respect to the axial direction, which second angle is in the range of 45 ° to 80 °, preferably in the range of 50 ° to 70 °. For example, the third and/or fourth contact surfaces may be flat. It is also possible to have a plurality of third contact surfaces, each of which is flat, but not necessarily arranged parallel to each other. Furthermore, there may be a plurality of fourth contact surfaces, each of which is flat, but not necessarily arranged parallel to each other. The third and/or fourth contact surface may also be designed as a taper sleeve. For example, the third contact surface may form an outer cone and the fourth contact surface may form an inner cone, or vice versa.

The third force booster component can at least partially surround the first force booster component in terms of geometry, whereby a further reduction in installation space can be achieved.

In a structurally simple embodiment, the input member is provided by a first rotatable spindle having an external thread at a first end, and the first force multiplier member has an internally threaded axial bore into which the external thread of the first spindle is screwed. Furthermore, if a rotational movement of the first force multiplier means is blocked, a rotational movement of the first spindle can thus be converted into an axial movement of the first force multiplier means.

In this embodiment it is particularly advantageous that the first spindle has a second end opposite its first end, to which a hand wheel is attached, by means of which the first spindle can be rotated. Thus, by rotating the hand wheel, in particular about the axial direction, the first force multiplier member and thus the output member may be moved. In this way, fine adjustment of the grinding gap can be achieved by turning the hand wheel.

Advantageously, the output member is rotatably supported on the third force multiplier member. This may be achieved, for example, by the third force multiplier member comprising a pull plate having an opening through which the output member extends, the output member having a radial projection at the first end, the output member resting on said pull plate by means of the radial projection. Further preferably, the output member may be formed as a second spindle and in particular has an external thread at a second end opposite the first end, the second bearing body having an internally threaded joint into which the external thread of the second spindle is screwed. In this way, coarse adjustment of the grinding gap can be achieved by rotating the second spindle.

For the separation of the grinding roller, it is preferred that the roller assembly has a separation lever which is rotatably mounted on the first bearing body via a first separation joint and which has a guide surface, and that the force booster has a guide roller along which the guide surface rolls when the separation lever is rotated about the first separation joint, so that the force booster moves relative to the first bearing body. This solution with guide surfaces and guide rollers is advantageous compared to the known solutions with eccentrics and levers, because it allows a more compact design, generates a position-independent restoring torque and requires the application of a lower separating force, it being further preferred that the feasibility of the guiding movement of the guide roller provided by this solution, which can be specified by the profile of the other guide surface, is provided. For example, the release lever may be connected to the piston rod of the cylinder via a second release joint, such that the release lever may be rotated about the first release joint by actuating the cylinder. This then causes the guide surface to roll along the guide roller to move the force multiplier relative to the first bearing body.

Such a mechanism is also advantageous for a roller assembly without a booster according to the first aspect of the invention, i.e. generally for a roller assembly for a milling device, comprising a first roller held by at least one first bearing body and a second roller held by at least one second bearing body, wherein the first bearing body and the second bearing body are adjustable relative to each other by means of an adjusting device such that a milling gap formed between the first roller and the second roller is adjustable. The roller assembly may have a separation rod which is rotatably mounted on the first bearing body via a first separation joint. The release lever may have a guide surface, and the actuator coupled to the second bearing body may have a guide roller, along which the guide surface rolls when the release lever is rotated about the first release joint, so that the actuator and thus the second bearing body move relative to the first bearing body. The actuator may be, for example, a force multiplier according to the invention or another force multiplier coupled to the second bearing body. Also in this more general concept, the release lever may be connected to the piston rod of the cylinder via a second release joint, such that the v-shaped lever may be rotated about the first release joint by actuation of the cylinder. This then causes the guide surface to roll along the guide roller, so that the second bearing body moves relative to the first bearing body.

It is furthermore expedient for the roller assembly to comprise at least one bearing nipple and at least one spring element, wherein the bearing nipple can be mounted elastically via the spring element on a frame of the milling device and the second bearing body can be mounted rotatably and elastically on the frame. The spring element may be, for example, a leaf spring assembly known per se. When foreign matter enters the grinding gap, the bearing adapter can be moved relative to the machine frame, so that the grinding gap can be widened. In this way, safety against foreign objects can be provided.

Such a mechanism is also advantageous for a roller assembly which neither has a booster according to the first aspect of the invention nor has a combination of a guide surface and a guide roller as described above, i.e. in general for a roller assembly for a milling device which comprises a first roller held by at least one first bearing body and a second roller held by at least one second bearing body, wherein the first bearing body and the second bearing body are adjustable relative to each other by means of an adjusting device such that a milling gap formed between the first roller and the second roller is adjustable. The roller assembly may have at least one bearing adapter and at least one spring element, the bearing adapter being elastically mountable on a frame of the milling device via the spring element, and the second bearing body being rotatably and elastically mountable on the frame.

In a further aspect of the invention there is provided a milling apparatus, such as a roller mill, a malt grain mill, a feed mill and a coffee mill. The milling apparatus comprises a housing and at least one roller assembly as described above inserted or insertable into the housing. This provides the milling device with the advantages of the roller assembly already explained above.

In a further aspect, the invention also relates to a method for adjusting a grinding gap formed between the first roller and the second roller of the roller assembly described above. The method comprises the following steps: adding an input force to the force multiplier with the input member to move the output member of the force multiplier and thereby add an output force to the second bearing body and adjust the first and second bearing bodies relative to each other. Thereby, the advantages already explained can be achieved.

Drawings

The invention is explained in more detail below with reference to embodiments, in which the figures show:

fig. 1 is a side view of a part of a roller mill according to the invention, having a roller assembly with a booster;

FIG. 2 is a side sectional view of a roller assembly according to the present invention;

figure 3 is a detailed view of the force multiplier of the roller assembly according to the present invention.

Detailed Description

Fig. 1 shows a part of a roller mill 70 according to the invention with a frame 71 and a roller assembly 10 inserted therein. The roller assembly 10 comprises two first bearing bodies 13 mounted immovably relative to the frame 71 and two second bearing bodies 14 mounted rotatably about the bearing head 50. Only one bearing body is visible for each of the first bearing body 13 and the second bearing body 14. The bearing adapter 50 is resiliently mounted to the frame 71 via a leaf spring assembly 58. When foreign matter enters the grinding gap, the bearing adapter 50 moves relative to the chassis 71 so that the grinding gap can be widened. This provides security against foreign objects.

The roller assembly 10 further comprises a first roller 11 held at opposite ends by two first bearing bodies 13, and a second roller 12 held at opposite ends by two second bearing bodies 14. The first bearing body 13 and the second bearing body 14 are adjustable relative to each other by means of an adjusting device 15, so that the grinding gap formed between the first roller 11 and the second roller 12 is adjustable, as will be explained in more detail below.

As shown in fig. 2 and 3, the adjustment device 15 comprises a mechanical force multiplier 30 having a housing 61, a first rotatable spindle 31 having a first end 38 and a second end 41 opposite the first end, and a second rotatable spindle 32. The first spindle 31 serves as an input member 31, by means of which input force can be added to the force booster 30. For this purpose, a hand wheel 42 is attached to the second end 41 of the first spindle 31, by means of which hand wheel the first spindle 31 can be rotated.

The force multiplier 30 further comprises a first force multiplier member 33 displaceable in the axial direction a. The member includes an axial bore 39 having internal threads formed therein that engage external threads formed at the first end 38 of the first mandrel 31. The first force multiplier component 33 also has a plurality of flat first contact surfaces 34, which first contact surfaces 34 extend at an angle α of 18 ° relative to the axial direction a.

The force booster 30 further comprises two second force booster members 35 arranged opposite each other, which are displaceable in a transverse direction Q perpendicular to the axial direction a. In the axial direction a, the second force multiplier member 35 is supported by a support plate 43 extending perpendicularly to the axial direction a. Each of the second force multiplier members 35 comprises a second contact surface 36, the second force multiplier members 35 abutting the first contact surface 34 of the first force multiplier member 33 with the second contact surface 36. Furthermore, each of the second force multiplier members 35 has a third contact surface 45, which third contact surface 45 extends at an angle β of 60 ° relative to the axial direction a.

Furthermore, the force multiplier 30 comprises a third force multiplier member 47 which is displaceable in the axial direction a and has two fourth contact surfaces 46, the third force multiplier member 47 abutting the third contact surface 45 of the second force multiplier member 35 with the fourth contact surfaces 46. In the lateral direction Q, the third force multiplier member 47 is supported by the housing 61. The third force multiplier member 47 further comprises a pull plate 37 having an opening 48 through which opening 48 the second spindle 32 extends. The second mandrel 32 includes a radial projection 40 at the first end 59, with the second mandrel 32 resting on the pull plate 37 via the radial projection 40. In this way, the second spindle 32 is rotatably held on the third force multiplier member 47.

The second spindle 32 forms an output member 32 of the force multiplier 30, which allows output force to be added to the second bearing body 14. For this purpose, the second spindle 32 has an external thread at a second end 60 opposite the first end 59, which external thread engages with an internal thread of a nipple 44 rotatably held on the second bearing body 14.

The contact surfaces 34,36,45 and 46 are matched to one another such that the output force provided by the output member 32 is enhanced relative to the input force introduced into the input member 31. By rotating the hand wheel 42 about the axial direction a, the first spindle 31 and thus the internal thread provided at the first end 38 thereof is moved within the external thread of the first force multiplier member 33. Since the first force multiplier member 33 is prevented from rotating about the axial direction a, it moves in the axial direction a. Due to the contact between the first and second contact surfaces 34,36, the second force multiplier member 35 is pushed outwards in the transverse direction Q. Due to the contact between the third contact surface 45 and the fourth contact surface 46, the third force multiplier member 47 and thus the second spindle 32 is pulled in the axial direction a. The second bearing body 14 is then rotated about the bearing head 50 against the force of the spring 49 arranged between the bearing bodies 13, 14, so that the grinding gap formed between the first roller 11 and the second roller is reduced. The force multiplier 30 thus allows fine adjustment of the grinding gap.

If the grinding rolls are reground or regrooved, their diameter decreases, which makes the adjustment range of the "fine adjustment" too small. In this case, the grinding gap can be adjusted by coarse adjustment. This may be achieved by rotating the second spindle 32.

The force booster components 33,35,47 are integrated in the first bearing body 13, which ensures a space-saving design. Since the first spindle 31 and the second spindle 32 (i.e., the input member and the output member) are arranged coaxially with each other, the disturbance torque is also prevented or at least reduced.

As can also be seen from fig. 1 and 2, the roller assembly 10 has a separating lever 51 which is rotatably mounted on the first bearing body 13 via a first separating joint 52. Which is connected via a second disconnecting joint 53 to a piston rod 54 of a cylinder 55. By actuating the cylinder 55, the release lever 51 is rotated about the first release joint 52. Furthermore, the release lever 51 has a guide surface 56, which guide surface 56 rolls against a guide roller 57 of the force booster 30 during this movement. This allows the booster 30 to move in the axial direction a. This may be necessary, for example, if no or too little grinding stock is fed in.