Jaw crusher

Abstract

A jaw crusher and a method of use thereof, the jaw crusher comprising a crusher housing (7) having an inlet (18) for material to be crushed, an outlet (20) for material that has been crushed. There is a movable jaw (2) having a wear plate (14); and a fixed jaw (4) provided with a second wear plate (16). The movable jaw (2) and the fixed jaw (4) form a crushing chamber (6) therebetween, and the movable jaw (2) is coupled to an eccentric jaw crusher shaft (8) that reciprocates the movable jaw in an eccentric motion to crush material between the movable jaw (2) and the fixed jaw (4). A toggle system (33) is provided comprising a drive cylinder (35) provided with an internally mounted sensor to measure the position of the movable jaw (2) relative to the fixed jaw (4).

Description

Technical Field

[0001] The invention relates to a jaw crusher comprising a movable jaw and a fixed jaw, between which a variable crushing chamber of the jaw crusher is formed. The material to be crushed is fed to an inlet and is progressively crushed between the movable jaw and the fixed jaw to a minimum size, which is set by means of a positioning device for positioning the movable jaw. The invention further relates to a method for adjusting a jaw crusher. Background Art

[0002] Jaw crushers are used in many applications to break up hard materials such as chunks of rock and ore.

[0003] In use, the action of the movable jaw causes the material fed to the jaw crusher to move downward through the crushing chamber. The material to be crushed is fed to the inlet so that it is crushed against the wear plates on the movable jaw and the fixed jaw. The crushed material leaves the jaw crusher via the outlet. The jaws are further apart at the material inlet than at the material outlet, forming a conical crushing chamber so that the material is gradually crushed into smaller and smaller sizes as it travels downward until the material is small enough to leave the material outlet at the bottom of the crushing chamber.

[0004] The jaw crusher further comprises a positioning device for positioning the movable jaw to a desired position relative to the fixed jaw. The distance between the movable jaw and the fixed jaw is called the closing side setting (CSS), which is the shortest distance between the wear plate of the fixed jaw and the wear plate of the movable jaw.

[0005] It may be desirable to be able to adjust the closing side setting (CSS) in order to vary the size of the product that can exit the crushing chamber via the outlet. It is known to adjust the CSS manually. This requires both machine and human intervention to ensure that the desired gap setting is achieved to obtain a specified end product. Although the setting may be achieved using an adjustable actuator, the measurement of the CSS is derived by conventional measurement methods (e.g., tape measurement or setting gauges having predetermined dimensions).

[0006] McLanahan of WO 2015 / 035353 describes a jaw crusher having an adjustment mechanism coupled to an adjustable jaw for changing the angle of the adjustable jaw. A controller is configured to receive a measured parameter measured by a sensor and adjust a closing side setting based at least in part on the measured parameter. Typically, the sensor measures a parameter that provides information about the condition of the jaw crusher, such as electrical resistance, oil condition, hydraulic cylinder pressure, bearing temperature, or power.

[0007] EP 2868379 uses a level sensor to control the size of the crushed material and to measure the amount of material in the crushing chamber to vary the crushing capacity of the crusher. Summary of the invention

[0008] It is an object of the present invention to eliminate the need for excessive machine downtime. It is another object of the present invention to eliminate human intervention when obtaining CSS measurements. It is another object of the present invention to obtain the total wear value on the wear plate over time and compensate for this in the CSS position. These objects have been achieved by the present invention as set out in the attached independent claims cited, and further preferred embodiments and advantages are set out in the attached dependent claims, the project section and the description.

[0009] According to a first aspect of the present invention, there is provided a jaw crusher, comprising: a crusher housing having an inlet for material to be crushed, an outlet for crushed material, a movable jaw and a fixed jaw, the movable jaw being provided with a wear plate and the fixed jaw being provided with a second wear plate, the movable jaw and the fixed jaw forming a crushing chamber between the movable jaw and the fixed jaw, the movable jaw being coupled to an eccentric jaw crusher shaft which reciprocates the movable jaw in an eccentric motion to crush material between the movable jaw and the fixed jaw, A toggle system comprising a toggle plate, a toggle beam and a toggle clamping cylinder for clamping the toggle plate, wherein the toggle system further comprises a drive cylinder acting on the toggle beam for adjusting the position of the movable jaw relative to the fixed jaw, wherein the drive cylinder is provided with an internally mounted sensor for measuring the position of the movable jaw relative to the fixed jaw. Advantageously, the present invention improves the measurement and control of the movable jaw position.

[0010] Preferably, the drive cylinder is a hydraulic drive cylinder.

[0011] Advantageously, the hydraulic drive cylinder is easy to control and easy to maintain.

[0012] Preferably, the internally mounted sensor is centrally mounted in the drive cylinder.

[0013] Advantageously, a centrally mounted sensor results in a compact design and is integrated in the drive cylinder.

[0014] Preferably, the internally mounted sensor is a magnetostrictive linear position sensor.

[0015] Advantageously, the magnetostrictive sensor is particularly shock-resistant, waterproof, operates over a wide temperature and pressure range, and provides suitable resolution and measurement length.

[0016] Preferably, the internally mounted sensor measures the travel distance of the drive cylinder. The measurement of the travel distance helps determine the life of the component.

[0017] Preferably, the measurement of the travel distance provides the linear distance between the movable jaw and the fixed jaw.The measurement of the linear distance improves the accuracy of the measurement.

[0018] Preferably, the measurement of the travel distance provides a measure of the total wear on the movable jaw wear plates and the fixed jaw wear plates.This measurement of wear allows the position of the movable jaw to be adjusted.

[0019] Preferably, the measurement of the travel distance is constantly measured by the internally mounted sensor. Constant measurement allows real time adjustment of the movable jaw position and trend analysis recorded over time on the PLC.

[0020] Preferably, the drive cylinder is driven to push the movable jaw and thus the movable jaw wear plate into contact with the fixed jaw wear plate to calibrate the distance measured by the internally mounted sensor by achieving a zero CSS position. The contact between the movable jaw and the fixed jaw helps determine the wear on the pads and when the pads need to be replaced or turned over.

[0021] Preferably, the jaw crusher further comprises a control block, the control block further comprising a pressure sensor, the pressure sensor being configured to detect contact between the movable jaw and the fixed jaw. The pressure sensor facilitates positioning of the movable jaw relative to the fixed jaw.

[0022] According to a second aspect of the present invention, there is provided a method for adjusting a jaw crusher, the jaw crusher comprising: a crusher housing having an inlet for material to be crushed, an outlet for crushed material, a movable jaw and a fixed jaw, the movable jaw being provided with a wear plate, the fixed jaw being provided with a second wear plate, the movable jaw and the fixed jaw forming a crushing chamber between the movable jaw and the fixed jaw, the movable jaw being coupled to an eccentric jaw crusher shaft, the eccentric jaw crusher shaft causing the movable jaw to reciprocate in an eccentric motion to crush material between the movable jaw and the fixed jaw, A toggle system, wherein the system comprises a toggle plate, a toggle beam and a toggle clamping cylinder, the toggle clamping cylinder being connected to the toggle beam to clamp the toggle plate, wherein the toggle system further comprises a drive cylinder acting on the toggle beam for adjusting the position of the movable jaw relative to the fixed jaw, wherein the drive cylinder is provided with an internally mounted sensor to measure the position of the movable jaw relative to the fixed jaw, the method comprising: The movable jaw is moved to a position at or near the fixed jaw by means of the drive cylinder, A sensor mounted internally in the drive cylinder is used to measure the travel of the drive cylinder to calculate the position of the movable jaw relative to the fixed jaw.The present invention improves the measurement and control of the movable jaw position and hence the CSS.

[0023] Preferably, the measurement of the travel distance provides a measure of the total wear on the movable jaw wear plate and the fixed jaw wear plate.The measurement of the travel distance assists in determining the life of components.

[0024] Preferably, the measurement of the travel distance is used to set the position of the moveable jaw relative to the fixed jaw. This allows precise control of the size of the product leaving the machine.

[0025] The crusher may be configured to store the wear measurement values ​​and to store values ​​for the number of crushing hours, and to calculate the wear rate of the wear plate based on the stored values.

[0026] The crusher may be configured to calculate an estimated life of the wear plates based on the wear rate.

[0027] The crusher may comprise a programmable logic controller (PLC). Suitably, the calculations explained above may be performed by means of the PLC.

[0028] In any embodiment, the toggle system (and in particular the CSS) is controlled by a PLC.

[0029] Preferably, a pressure sensor may be configured to detect contact between the movable jaw and the fixed jaw.The pressure sensor assists in positioning the movable jaw relative to the fixed jaw.

[0030] Preferably, the drive cylinder may push the movable jaw, and hence the movable jaw wear plate, into contact with the fixed jaw wear plate to calibrate the distance measured by the internally mounted sensor by achieving a zero CSS position. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The invention will be more clearly understood from the following description of embodiments of the invention given by way of example only, with reference to the accompanying drawings, in which:

[0032] Figure 1 is a front isometric view of a jaw crusher according to the present invention;

[0033] Figure 2 is a rear isometric view of a jaw crusher according to the present invention;

[0034] Figure 3 is an isometric view of a toggle system for a jaw crusher according to the present invention;

[0035] Figure 4is an isometric view of a drive cylinder of an adjustment device for a jaw crusher according to the present invention;

[0036] Figure 5 is an isometric view of the sensor installed in the conditioning equipment;

[0037] Figure 6 is a side view of a jaw crusher according to the present invention, in which the adjustment device drive cylinder is shown;

[0038] Figure 7 is a side cross-sectional view of the maximum CSS distance between the fixed jaw and the movable jaw of the jaw crusher according to the present invention;

[0039] Figure 8 is a side cross-sectional view of the minimum CSS distance between the fixed jaw and the movable jaw of the jaw crusher according to the present invention;

[0040] Fig. 9 is a side cross-sectional view of a fixed jaw and a movable jaw of a jaw crusher according to the present invention in a fully closed position;

[0041] Fig.10 is an isometric view of a wedge and a toggle beam in contact in a jaw crusher according to the present invention;

[0042] Fig.11 is an isometric view of a wedge and a toggle beam that are not in contact in a jaw crusher according to the present invention;

[0043] Fig.12 is an isometric view of a control block including a pressure sensor in a jaw crusher according to the present invention; and

[0044] Fig.13 A graph of the CSS setting plotted against cylinder stroke for different wear values. DETAILED DESCRIPTION

[0045] The present invention provides an apparatus and method for measuring and controlling the position of a movable jaw relative to a fixed jaw of a jaw crusher. The result is achieved by an adjustment device for adjusting the position of the movable jaw relative to the fixed jaw. The adjustment device comprises a drive cylinder having an internally mounted sensor to measure the position of the movable jaw relative to the fixed jaw.

[0046] In at least one embodiment of the present invention, an apparatus is provided in which the sensor is integrated with the adjustment cylinder to detect the position of the movable jaw. The detected position of the movable jaw is compared with the actual position to adjust the CSS when necessary or desired.

[0047] Typically a jaw crusher will have two adjustment cylinders which control the position of the respective wedges and which will communicate with the sensor.

[0048] Additionally, when in maintenance mode, the adjustment cylinder of at least one example of the apparatus according to the invention is actuatable to push the movable jaw against the fixed jaw to obtain a zero CSS position measurement. Measuring the change in the position at which the movable jaw touches the fixed jaw provides an indication of wear. The adjustment cylinder is also provided with a pressure sensor configured to detect physical contact between the movable jaw and the fixed jaw occurring at zero CSS.

[0049] These measurements can determine with high accuracy what the nominal CSS setting is, without the need for any external reference points. The sensor can also be calibrated to ensure accurate measurements over time.

[0050] The following figures show an example of a jaw crusher with a positioning device and a sensor according to the present invention. Figures 1 to 12 A jaw crusher and its various components are described.

[0051] Specific reference Figure 1 , Figure 2 and Figure 7 The jaw crusher 1 comprises a movable jaw 2 and a fixed jaw 4, which are accommodated in a housing 7 and form a variable crushing chamber 6 of the jaw crusher 1 therebetween. The movable jaw 2 is driven by an eccentric jaw crusher shaft 8, which enables the movable jaw 2 to move forward and backward and up and down relative to the fixed jaw 4.

[0052] The inertia required for crushing the material fed to the jaw crusher 1 is provided by a counterweight flywheel 10 which is operable to move an eccentric jaw crusher shaft 8 on which the movable jaw 2 is mounted. The jaw crusher motor is operable to rotate the flywheel 10 by means of a drive belt. A wear plate 16 is provided on the fixed jaw 4 and a wear plate 14 is provided on the movable jaw 2. Thus, movement of the eccentric shaft 8 causes eccentric movement of the movable jaw 2.

[0053] like Figure 1 , Figure 7 and Figure 8 As shown, material to be crushed is fed to an inlet 18 for material to be crushed. The crushed material leaves the jaw crusher 1 via an outlet 20 for crushed material. The jaws 2, 4 are further apart at the material inlet 18 than at the material outlet 20, thereby forming a conical crushing chamber 6, so that as the material travels downward toward the outlet 20, the material is progressively crushed into smaller and smaller sizes until the material is small enough to exit from the material outlet 20 at the bottom of the crushing chamber 6.

[0054] Specific reference Figure 1 , Figure 7 , Figure 8 and Fig.10 The position of the movable jaw 2 relative to the fixed jaw 4 is set by an adjustment mechanism. The adjustment mechanism is generally referred to as a toggle system, which is configured to set or adjust the spacing between the lower end of the movable jaw 3 and the lower end of the fixed jaw 5 so that a predetermined maximum product size can be produced during the crushing cycle.

[0055] Figure 3 is an isometric view of a toggle system for a jaw crusher according to the present invention. In this embodiment, the toggle system 33 comprises a toggle beam 24 having a wedge 25 (see also Fig.10 ), the wedge 25 is configured to be driven by a drive cylinder 27 (see also Fig.10 ) is moved so that the wedge slides in and out on the transverse axis of the jaw crusher. The wedge 25 is moved by a hydraulic cylinder 27 to push the toggle beam 24 and thereby adjust the position of the movable jaw 2 relative to the fixed jaw 4.

[0056] Further references Figure 3 , the drive cylinder includes a free end. Figure 3 and Figure 4 In the exemplary embodiment of , this is made possible by providing a pivot on the cylinder 31 of the drive cylinder 25. The pivot is disposed between opposite ends of the drive cylinder 25. This configuration allows easy access to the sensor 37 when maintenance or replacement is required.

[0057] The hydraulic cylinder 27 is configured to move the wedge to increase or decrease its width, thereby allowing the toggle plate 22 (see also Fig.10 ) and thus moves the movable jaw 2 towards the fixed jaw and thus changes the spacing between the jaws 2, 4 at the lower ends 3, 5, respectively, Figure 7 shows a wider gap between the lower ends 3, 5, and Figure 8 A narrower gap is shown.

[0058] The hydraulic cylinder 35 is configured to maintain pressure in the bore side of the cylinder to abut the toggle beam 24 against the wedge 25. This abutment is critical during operation as it transfers the crushing load from the moving jaw 2 to the surrounding structure. Furthermore, the hydraulic cylinder 35 has a direct relationship with the cylinder 27 in terms of position, which means that Figure 4 The sensor 37 in can communicate with the PLC to control the actuation of the cylinder 27 to set the CSS.

[0059] The toggle system 33 comprises a toggle plate 22, a toggle beam 24 and a toggle clamping cylinder 26 which connects the toggle beam 24 to the movable jaw and is configured to clamp the toggle plate 22 therebetween, ie to the movable jaw.

[0060] That is, the toggle beam 24 , the toggle clamping cylinder 26 and the toggle plate 22 are arranged to pivot together with the movable jaw, in particular to pivot about the crusher axis 8 .

[0061] The toggle clamping cylinder 26 is directly connected to the toggle beam 24. The toggle clamping cylinder 25 is operable to push the toggle beam 24 towards the movable jaw. Thereby, the toggle plate is clamped to the movable jaw. The toggle plate can cooperate with a toggle seat provided on the movable jaw.

[0062] The toggle clamp cylinder 26 is pivotally mounted to the toggle beam 24, for example, via a mounting bracket. The toggle clamp cylinder 26 is pivotally mounted to the toggle beam 24, for example, via a mounting bracket. Fig.10 The mounting bracket is shown pivotally mounted to the movable jaw.

[0063] The toggle system 33 further comprises a drive cylinder 35 acting on the toggle beam 24 for adjusting the position of the movable jaw 2 relative to the fixed jaw 4, such as in the proximal and distal directions, respectively. The drive cylinder 35 is provided with an internally mounted sensor 37 to measure the position of the movable jaw 2 relative to the fixed jaw 4.

[0064] The drive cylinder 35 is mounted to the crusher housing 7, specifically to the outside of the housing, and to the toggle beam 24. Thus, the movable jaw can be displaced by extending and retracting the drive cylinder 35.

[0065] The toggle clamping cylinder 26 maintains pressure in the annular side of the cylinder to clamp the toggle plate 22 ( Fig.10 ), thereby ensuring that the crushing force is transmitted from the movable jaw 2.

[0066] Figure 4 is an isometric view of a drive cylinder of an adjustment device for a jaw crusher according to the present invention.

[0067] The drive cylinder comprises a piston shaft 39 in a cylinder 31, which has a coupling 42. A transducer 37 is mounted centrally in the cylinder 31 and measures the position of the movable jaw, which is adjustable relative to the fixed jaw.

[0068] In this example of the present invention, and with reference to the attached Figure 5 and Figure 6, sensor 37 is centrally mounted in cylinder 31 and comprises a linear displacement sensor which detects the position of the rod / piston 39 relative to cylinder 31. In this example of the invention, linear displacement sensor 37 is a magnetostrictive linear position sensor suitable for use in extreme environments. It comprises a magnet 41 mounted on piston shaft 39, and the magnet position and therefore the stroke is detected with a probe shaft 43. The magnetostrictive sensor has exceptional shock resistance, extreme waterproofing, an operating temperature range of -40°C to +85°C, a pressure rating of up to 1000 Bar, a resolution of 1 micron and a suitable measuring length for this application.

[0069] Sensor 37 measures cylinder extension / position and the signal from this sensor is used to derive the CSS via the machine programmable logic controller (PLC). The cylinder 35 position can also be set via the machine programmable logic controller PLC.

[0070] In addition to the linear displacement sensor 37, a pressure sensor 47 is also provided (see Fig.12 ) to detect an external load on the movable jaw. The pressure sensor is configured to detect contact between the movable jaw and the fixed jaw. The pressure sensor facilitates positioning of the movable jaw relative to the fixed jaw.

[0071] The cylinder 35 allows the movable jaw to move through the entire range of the CSS opening. In addition, with the additional stroke length provided by the cylinder, additional wear measurement compensation is achieved. In this example, up to 50mm of wear measurement compensation can be achieved.

[0072] Figures 7 to 11 The range of CSS positions that can be achieved using the apparatus of the present invention is shown.

[0073] Figure 7 is a side cross-sectional view of the maximum CSS distance between the fixed jaw and the movable jaw of a jaw crusher. It shows a jaw crusher 1 as described above and in which the distance between the lower end 3 of the movable jaw 2 and the lower end 5 of the fixed jaw 4 is at its maximum extent.

[0074] Figure 8 is a side cross-sectional view of the minimum CSS distance between the fixed jaw and the movable jaw of the jaw crusher when the jaw crusher is in use. It shows a jaw crusher 1 as described above in which the distance between the lower end 3 of the movable jaw 2 and the lower end 5 of the fixed jaw 4 is at its minimum.

[0075] from Figure 7 and Figure 8It can be seen that the drive cylinder 35 has a line of action substantially aligned with the direction of movement of the movable jaw. Alternatively or in addition, the drive cylinder 35 is arranged to extend substantially aligned with a tangent to the lower end portion of the movable jaw when the movable jaw pivots. This configuration helps to improve the accuracy of the CSS calculation.

[0076] As from Figure 1 and Figure 2 It can further be seen that the drive cylinder 35 is arranged on the outer side of the crusher housing 7. Advantageously, this configuration provides a certain level of protection for the drive cylinder 35 and the sensor 37, such as from dust and crushed material, while also enabling access to the sensor 37 from the outside of the crusher housing 7.

[0077] Fig. 9 is a side cross-sectional view of the fixed jaw and movable jaw of a jaw crusher according to the invention in a fully closed position. It shows a jaw crusher 1 as described above, in which the lower end 3 of the movable jaw 2 and the lower end 5 of the fixed jaw 4 overlap.

[0078] Fig.10 2 is an isometric view of a toggle beam 24 and a wedge 25 in contact in a jaw crusher according to the present invention. It shows a jaw crusher 1 as described above and a toggle plate 22. As shown, the toggle beam 24 is in contact with the wedge 25 and the crushing force is transmitted from the movable jaw 2.

[0079] Fig.11 is an isometric view of a toggle beam 24 and wedge 25 not in contact in a jaw crusher according to the invention. It shows a jaw crusher 1 as described above and a toggle plate 22. As shown, the toggle beam 24 is not in contact with the wedge 25. This position allows wear measurement and CSS adjustment.

[0080] Fig.12 4 is an isometric view of a control block 45 including a pressure sensor 47 in a jaw crusher according to the present invention. When in maintenance / wear calibration mode, the adjustment cylinder is actuatable to push the movable jaw against the fixed jaw to obtain a zero CSS position measurement. Measuring the change in the position at which the movable jaw contacts the fixed jaw provides an indication of wear. The pressure sensor 47 is configured to detect physical contact between the movable jaw and the fixed jaw occurring at zero CSS.

[0081] Fig.13 is a graph 51 which plots CSS setting 53 against cylinder stroke 55 and shows a series of curves 56 of wear values ​​for 0mm 57 , 10mm 59 , 20mm 61 , 30mm 63 , 40mm 65 , 50mm 67 and 60mm 69 . Fig.13Examples of the types of calibration graphs that may be used to calculate wear are provided.

[0082] In another example of the invention, a wear compensation subroutine is built into the system logic to measure the wear on the jaw wear plates. When material is removed from the crushing zone, wear of the plates (also called jaw liners) inherently increases the gap setting.

[0083] When metal to metal contact occurs (zero CSS), the amount of wear can be automatically determined by recording the position on one or each linear transducer. The distance between the movable jaw and the fixed jaw can be set to compensate for wear in the jaw wear plate before the user specifies the final size of the product.

[0084] In addition to this, the logic is built so that the system can predict the wear rate for the user's specific application and automatically give the user updates on when the worn pads need to be replaced or turned over (wear prediction). The set points in the logic are directly related to the pad type selected within the PLC.

[0085] Wear calibration is performed periodically, whereby each wear measurement will be stored in the machine PLC. Plotting this wear measurement against the number of crushing hours, which has also been stored, will give the wear rate of the pad in its current application. Using some other parameters such as engine load / motor power consumption and product output (TPH), an estimate of the life of the wear plate under predetermined conditions can be obtained. The wear life given in time will be presented to the customer and allow the customer to order replacement pads at the right time.

[0086] The invention is not limited to the embodiments described above but may be varied in construction and details.

[0087] project

[0088] Item 1. A jaw crusher 1, comprising: a crusher housing 7 having an inlet 18 for material to be crushed, an outlet 20 for already crushed material, a movable jaw 2 and a fixed jaw 4, the movable jaw 2 being provided with a wear plate 14 and the fixed jaw 4 being provided with a second wear plate 16, a crushing chamber 6 being formed between the movable jaw 2 and the fixed jaw 4, the movable jaw 2 being coupled to an eccentric jaw crusher shaft 8 which reciprocates the movable jaw in an eccentric motion to crush material between the movable jaw 2 and the fixed jaw 4, and A toggle system 33, which includes a toggle plate 22, a toggle beam 24 and a toggle clamping cylinder 26, which connects the toggle beam 24 to the movable jaw and is configured to clamp the toggle plate 22 therebetween, wherein the toggle system 33 further includes a drive cylinder 35, which acts on the toggle beam 24 to adjust the position of the movable jaw 2 relative to the fixed jaw 4, wherein the drive cylinder 35 is provided with an internally mounted sensor to measure the position of the movable jaw 2 relative to the fixed jaw 4.

[0089] Item 2. The jaw crusher according to Item 1, wherein the drive cylinder 35 is a hydraulic drive cylinder.

[0090] Item 3. A jaw crusher according to item 1 or item 2, wherein the internally mounted sensor 37 is centrally mounted in the drive cylinder.

[0091] Item 4. The jaw crusher according to any of the preceding items, wherein the internally mounted sensor is a magnetostrictive linear position sensor.

[0092] Item 5. A jaw crusher according to any of the preceding items, wherein the internally mounted sensor measures the travel distance of the drive cylinder.

[0093] Item 6. A jaw crusher according to Item 5, wherein the measurement of the stroke distance provides a linear distance between the movable jaw and the fixed jaw.

[0094] Item 7. A jaw crusher according to item 5 or item 6, wherein the measurement of the stroke distance provides a measure of the total wear on the movable jaw wear plate 14 and the fixed jaw wear plate 16.

[0095] Item 8. A jaw crusher according to items 5 to 7, wherein the stroke distance is constantly measured by the internally mounted sensor.

[0096] Item 9. A jaw crusher according to any preceding item, wherein the drive cylinder is driven to push the movable jaw 2 and thereby the movable jaw wear plate 14 into contact with the fixed jaw wear plate 16 to calibrate the distance measured by the internally mounted sensor by obtaining a zero CSS position.

[0097] Item 10. The jaw crusher according to any preceding item, further comprising a control block 45 having a pressure sensor 47 configured to detect contact between the movable jaw wear plate 14 and the fixed jaw wear plate 16 .

[0098] Item 11. The crusher according to any one of the preceding items 7 to 10, further configured to store the wear measurement value and store a value of crushing hours, and calculate the wear rate of the wear plate based on the stored values.

[0099] Item 12. The crusher according to any one of the preceding items 7 to 11, further configured to calculate an estimated life of the wear plate based on the wear rate.

[0100] Item 13. A method for adjusting a jaw crusher, the jaw crusher comprising: a crusher housing 7 having an inlet 18 for material to be crushed, an outlet 20 for crushed material, a movable jaw 2 and a fixed jaw 4, the movable jaw 2 being provided with a wear plate 14, the fixed jaw 4 being provided with a second wear plate 16, a crushing chamber 6 being formed between the movable jaw 2 and the fixed jaw 4, the movable jaw 2 being coupled to an eccentric jaw crusher shaft 8, the eccentric jaw crusher shaft 8 causing the movable jaw to reciprocate in an eccentric motion to crush material between the movable jaw 2 and the fixed jaw 4, and a toggle system 33 comprising a toggle plate 22, a toggle beam 24 and a toggle clamping cylinder 26, the toggle clamping cylinder 26 connecting the toggle beam 24 to the movable jaw and being configured to clamp the toggle plate 22 therebetween, wherein the toggle system 33 further comprises a drive cylinder 35 acting on the toggle beam 24 for adjusting the position of the movable jaw 2 relative to the fixed jaw 4, wherein the drive cylinder 35 is provided with an internally mounted sensor for measuring the position of the movable jaw 2 relative to the fixed jaw 4, The method comprises: The movable jaw is moved to a position at or near the fixed jaw by means of a drive cylinder 35, A sensor 37 is used to measure the travel of the drive cylinder 35 to calculate the position of the movable jaw relative to the fixed jaw.

[0101] Item 14. The method of item 13, wherein the measurement of the travel distance provides a measure of the total wear on the movable jaw wear plate 14 and the fixed jaw wear plate 16.

[0102] Item 15. A method according to any one of Items 13 or 14, wherein the measured value of the travel distance is used to set the position of the movable jaw relative to the fixed jaw.

[0103] Item 16. The method of any one of Items 13 to 15, wherein the pressure sensor 47 is configured to detect contact between the movable jaw and the fixed jaw.

[0104] Item 17. A method according to any one of items 13 to 16, wherein the drive cylinder pushes the movable jaw 2 and therefore the movable jaw wear plate 14 into contact with the fixed jaw wear plate 16 to calibrate the distance measured by the internally mounted sensor by obtaining a zero CSS position.

Claims

1. A jaw crusher (1), comprising: a crusher housing (7) having an inlet (18) for material to be crushed, an outlet (20) for crushed material, a movable jaw (2) and a fixed jaw (4), the movable jaw (2) being provided with a wear plate (14), the fixed jaw (4) being provided with a second wear plate (16), the movable jaw (2) and the fixed jaw (4) forming a crushing chamber (6) therebetween, and the movable jaw (2) being coupled to an eccentric jaw crusher shaft (8) which causes the movable jaw to reciprocate in an eccentric motion to crush material between the movable jaw (2) and the fixed jaw (4), and A toggle system (33), the toggle system (33) comprising a toggle plate (22), a toggle beam (24) and a toggle clamping cylinder (26), the toggle clamping cylinder (26) being connected to the toggle beam (24) for clamping the toggle plate (22), wherein the toggle system (33) further comprises a drive cylinder (35), the drive cylinder (35) acting on the toggle beam (24) for adjusting the position of the movable jaw (2) relative to the fixed jaw (4), wherein the drive cylinder (35) is provided with an internally mounted sensor for measuring the position of the movable jaw (2) relative to the fixed jaw (4).

2. The jaw crusher according to claim 1, wherein: The drive cylinder (35) is a hydraulic drive cylinder.

3. The jaw crusher according to claim 1 or claim 2, wherein: The internally mounted sensor (37) is mounted centrally in the drive cylinder.

4. A jaw crusher according to any one of the preceding claims, wherein: The internally mounted sensor is a magnetostrictive linear position sensor.

5. A jaw crusher according to any one of the preceding claims, wherein: The internally mounted sensor measures the travel distance of the drive cylinder.

6. The jaw crusher according to claim 5, wherein: The travel distance measurement provides the linear distance between the movable jaw and the fixed jaw.

7. The jaw crusher according to claim 5 or 6, wherein: The measurement of the travel distance provides a measure of the total wear on the movable jaw wear plate (14) and the fixed jaw wear plate (16).

8. The jaw crusher according to any one of claims 5 to 7, wherein: The travel distance is constantly measured by the internally mounted sensor.

9. A jaw crusher according to any one of the preceding claims, wherein: The drive cylinder is driven to push the movable jaw (2) and thereby push the wear plate (14) of the movable jaw into contact with the wear plate (16) of the fixed jaw to calibrate the distance measured by the internally mounted sensor by obtaining a zero CSS position.

10. A jaw crusher according to any one of the preceding claims, further comprising a control block (45) having a pressure sensor (47) configured to detect contact between the wear plate (14) of the movable jaw and the wear plate (16) of the fixed jaw.

11. A crusher according to any one of claims 7 to 10, further configured to store the wear measurement values ​​and store values ​​of crushing hours, and to calculate the wear rate of the wear plate based on the stored values.

12. A crusher according to any one of claims 7 to 11, further configured to calculate an estimated life of the wear plate based on the wear rate.

13. A method for adjusting a jaw crusher, the jaw crusher comprising: a crusher housing (7) having an inlet (18) for material to be crushed, an outlet (20) for crushed material, a movable jaw (2) and a fixed jaw (4), the movable jaw (2) being provided with a wear plate (14), the fixed jaw (4) being provided with a second wear plate (16), the movable jaw (2) and the fixed jaw (4) forming a crushing chamber (6) therebetween, and the movable jaw (2) being coupled to an eccentric jaw crusher shaft (8) which causes the movable jaw to reciprocate in an eccentric motion to crush material between the movable jaw (2) and the fixed jaw (4), and A toggle system (33), the toggle system (33) comprising a toggle plate (22), a toggle beam (24) and a toggle clamping cylinder (26), the toggle clamping cylinder (26) being connected to the toggle beam (24) for clamping the toggle plate (22), wherein the toggle system (33) further comprises a drive cylinder (35), the drive cylinder (35) acting on the toggle beam (24) for adjusting the position of the movable jaw (2) relative to the fixed jaw (4), wherein the drive cylinder (35) is provided with an internally mounted sensor for measuring the position of the movable jaw (2) relative to the fixed jaw (4), The method comprises: The movable jaw is moved to a position at or near the fixed jaw by means of the drive cylinder (35), The sensor (37) is used to measure the stroke of the drive cylinder (35) to calculate the position of the movable jaw relative to the fixed jaw.

14. The method according to claim 13, wherein: The measurement of the travel distance provides a measure of the total wear on the movable jaw wear plate (14) and the fixed jaw wear plate (16).

15. The method according to any one of claims 13 or 14, wherein: The measurement of the travel distance is used to set the position of the movable jaw relative to the fixed jaw.

16. The method according to any one of claims 13 to 15, wherein: A pressure sensor (47) is configured to detect contact between the movable jaw and the fixed jaw.

17. The method according to any one of claims 13 to 16, wherein: The drive cylinder pushes the movable jaw (2) and thus the wear plate (14) of the movable jaw into contact with the wear plate (16) of the fixed jaw to calibrate the distance measured by the internally mounted sensor by obtaining a zero CSS position.

18. The method according to any one of the preceding claims 14 to 17, further comprising: storing the wear measurements; Storage of crushing hours; A wear rate of the wear plate is calculated based on the stored value.

19. The method of any preceding claim 18, further comprising calculating an estimated life of the wear plate based on the wear rate.

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