Method for optimizing dynamic balance of pulverizer

Abstract

The invention discloses a method for optimizing dynamic balance of a crusher, which is characterized in that according to the principle that hammer heads of the crusher are configured to be axially equal and radially symmetric, the hammer heads are arranged in a staggered and symmetric manner, firstly, each hammer head is weighed, and then from 1-N, the hammer heads are marked from heavy to light, and the hammer heads with the equal weight are arranged backwards according to the sequence from heavy to light; and the hammerheads are configured to corresponding positions according to a set arrangement diagram, so that the weight distribution of the hammerheads is balanced, and the purpose of optimizing dynamic balance is achieved. The invention aims to provide the method for optimizing the dynamic balance of the crusher, so as to solve the problems that the hammer head weight distribution cannot achieve the purposes of scientificity, rapidness and accuracy when the hammer head is installed for multiple times, repeated switching and even debugging during installation in the prior art, and the purpose of optimizing the dynamic balance is achieved by symmetrically arranging the hammer heads in a staggered manner according to the principle of axial equivalence and radial symmetry.

Description

Technical Field

[0001] The invention relates to a method for optimizing dynamic balance of a pulverizer. Background Art

[0002] The PFCK1618 reversible impact hammer mill of the Coal Preparation Department of the Coal and Coke Chemical Industry Branch is used to crush blended coal. Its transportation capacity is 500 tons / hour. A mill with stable operation and good dynamic balance is the key to measuring the effect of equipment installation and commissioning. After the mill runs for one cycle, generally two quarters, most hammers are severely worn (the wear on both sides of the hammer exceeds 5mm, and the top exceeds 15mm), which will cause problems such as substandard coal crushing fineness, hammer falling, and poor dynamic balance of the crusher. The present invention is used to optimize the dynamic balance of the coal pulverizer when installing and commissioning 64 hammers (8 rows and 8 columns) or 48 hammers (8 rows and 6 columns), which is scientific, efficient and accurate.

[0003] Commonly used fixed format: A coal pulverizer hammer configuration with optimized dynamic balance, the number of hammers is 64 (8 rows and 8 columns) or 48 (8 rows and 6 columns), and the hammer weight is more than 10Kg.

[0004] Referring to the invention of "A steel crusher rotor and crusher with optimized dynamic balance", the hammers between two adjacent partitions are connected by a synchronization device. The synchronization device connects multiple hammers located at the same axial position of the main shaft to make them rotate synchronously. When some hammers rotate due to resistance, they drive other hammers to rotate together, so that the loads of multiple hammers at the same axial position on the main shaft are balanced. Referring to the invention of "A balanced balancing method for grinding disc accessories of a vertical shaft crusher", multiple accessories are regarded as a hammer head as a whole, and two "hammer heads" with a weight less than ±0.2Kg are replaced symmetrically, so as to ensure the balanced balancing of the crusher. The difference between these two inventions and the present invention is that the hammer heads of the present invention are large in number and weight, and the high-speed rotation of the crusher has a large centrifugal force, which has higher requirements for dynamic balance. Summary of the invention

[0005] The purpose of the present invention is to provide a method for optimizing the dynamic balance of a crusher to solve the problem that "multiple calculations and repeated replacements, even debugging during installation, are required in the past, and the weight distribution of the hammer head cannot achieve the purpose of being scientific, fast and accurate". The purpose of optimizing the dynamic balance is achieved by symmetrically staggeredly arranging the hammer heads in accordance with the principles of axial equality and radial symmetry.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] The invention discloses a method for optimizing dynamic balance of a pulverizer. The method comprises the following steps: according to the principle of axial equality and radial symmetry of the hammer heads of the pulverizer, each hammer head is firstly weighed, and then marked from 1 to N from heavy to light, and hammer heads of equal weight are sequentially arranged; the hammer heads are arranged at corresponding positions according to a set arrangement diagram, so that the weight distribution of the hammer heads is balanced, thereby achieving the purpose of optimizing dynamic balance.

[0008] Furthermore, this method is applicable to the weight distribution of the hammer head of a coal pulverizer with a rotor having 8 rows and 8 columns.

[0009] Furthermore, this method is applicable to a crusher with 8 rows and 6 columns.

[0010] Furthermore, this method is applicable to a crusher with 8 rows and 4 columns.

[0011] Furthermore, this method is also applicable to a coal pulverizer with 6-row rotors.

[0012] Furthermore, the optimization of dynamic balance of the 8-row and 8-column coal pulverizer specifically includes the following steps:

[0013] (1) Weigh the weight of each hammer head and mark it on the hammer head;

[0014] (2) Arrange the hammers in order of weight from 1 to 64, with hammers of equal weight arranged in the back;

[0015] (3) Place the hammer head at the corresponding position according to the arrangement diagram;

[0016] (4) Arrange the third and sixth columns symmetrically;

[0017] (5) Arrange the second and seventh columns symmetrically;

[0018] (6) Arrange the first and eighth columns symmetrically.

[0019] Compared with the prior art, the beneficial technical effects of the present invention are:

[0020] At present, there are weight differences among hammers in the same batch. For example, a hammer with a standard weight of 10Kg is allowed to have an error of ±0.5Kg, and the weight is within the range of 9.80Kg-10.30Kg. When distributing such hammers, the calculation is often switched back and forth, and the effect is not ideal. The present invention can scientifically, quickly and efficiently complete the weight distribution of hammers, and can be used for the reuse of hammers with low wear. Hammers with single-sided wear of no more than 5mm on both sides and no more than 15mm on the top are selected, and weight distribution is performed according to this method, and they can be used as spare hammers.

[0021] The present invention can optimize the dynamic balance of the coal pulverizer, ensure the stable operation of the pulverizer during high-speed rotation, and extend the service life of the equipment. Scientific calculations are performed based on the weight differences of the pulverizer hammer heads, and the purpose of optimizing the dynamic balance is achieved by arranging the hammer heads in an axially equal and radially symmetrical manner.

[0022] The present invention mainly solves the problem of optimizing the dynamic balance of a large, high-speed rotating pulverizer. By accurately distributing hammer heads, the problem of poor dynamic balance of a coal pulverizer caused by many hammer heads and weight differences is improved. The present invention plays a positive role in extending the service life of the equipment and ensuring efficient and stable operation of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described below in conjunction with the accompanying drawings.

[0024] Figure 1 This is a schematic diagram of the arrangement of step 3;

[0025] Figure 2 This is a schematic diagram of the arrangement of step 4;

[0026] Figure 3 This is a schematic diagram of the arrangement of step 5;

[0027] Figure 4 This is a schematic diagram of the arrangement of step 6;

[0028] Figure 5 It is an overall schematic diagram of arranging hammer heads 1-64 in order from heavy to light;

[0029] Figure 6 Arrange photos for real objects. DETAILED DESCRIPTION

[0030] A method for optimizing dynamic balance of a crusher, the specific method steps are as follows (taking 8 rows and 8 columns as an example):

[0031] (1) Weigh the weight of each hammer head and mark it on the hammer head;

[0032] (2) Arrange the hammers in order of weight from 1 to 64, with hammers of equal weight arranged in the back;

[0033] (3) Place the hammer head in the corresponding position according to the arrangement diagram, such as Figure 1 ;

[0034] (4) Arrange the third and sixth columns symmetrically, such as Figure 2 ;

[0035] (5) Arrange the second and seventh columns symmetrically, such as Figure 3 ;

[0036] (6) Arrange the first and eighth columns symmetrically, such as Figure 4 ;

[0037] This method is applicable to the weight distribution of the hammer head of a coal pulverizer with an 8-row 8-column rotor. It can be extended to pulverizers with 8-row 6-column and 8-row 4-column rotors, and can also be expanded to coal pulverizers with 6-row rotors.

[0038] After all the hammer heads of the crusher are weighed, arrange the hammer heads 1-64 in order from heavy to light. Figure 5 (and Figure 6 The hammers of the same weight are arranged in the order of the middle position in the photo. The hammers arranged in this way can achieve axial equal weight and radial symmetry to the maximum extent, and the crusher has good stability when rotating at high speed, thus achieving the purpose of optimizing dynamic balance.

[0039] Technicians and workers in this field can complete a full set of hammer head configurations according to the description of the embodiments.

[0040] The coal preparation department has three PFCK1618 crushers, of which 1# and 2# crushers have 64*2=128 hammers, and 3# crusher has 32 hammers, each costing 250 yuan. The service life is two quarters, and each crusher can save 2 sets of hammers every year if it is extended by one quarter. A set of 2# crusher has 64 hammers, each costing 250 yuan, a whole set costing 16,000 yuan, and two sets costing 32,000 yuan. A set of 3# crusher has 42 hammers, each costing 640 yuan, a whole set costing 26,880 yuan, and two sets costing 53,760 yuan. A total of 85,760 yuan can be saved every year.

[0041] The invention scientifically, quickly and efficiently optimizes the dynamic balance of the crusher. The hammers are distributed with equal weight in the axial direction and symmetrical in the radial direction, which can ensure high stability and good dynamic balance when the crusher rotates at high speed. It can also be used to reuse hammers with low wear. After weighing the hammers in turn, the hammers are arranged from heavy to light 1-64 according to the arrangement diagram (see the figure below). The dynamic balance of the crusher configured in this way meets the standard.

[0042] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A method for optimizing dynamic balance of a pulverizer, characterized in that: The hammer heads of the crusher are arranged in a staggered and symmetrical manner according to the principle of axial equality and radial symmetry. First, each hammer head is weighed, and then marked from 1 to N from heavy to light, and hammer heads of equal weight are arranged in sequence; the hammer heads are configured to corresponding positions according to the set arrangement diagram to make the weight distribution of the hammer heads even and achieve the purpose of optimizing dynamic balance.

2. The method for optimizing dynamic balance of a pulverizer according to claim 1, characterized in that: This method is applicable to the weight distribution of the hammer head of a coal pulverizer with a rotor of 8 rows and 8 columns.

3. The method for optimizing dynamic balance of a pulverizer according to claim 1, characterized in that: This method is suitable for a crusher with 8 rows and 6 columns.

4. The method for optimizing dynamic balance of a pulverizer according to claim 1, characterized in that: This method is suitable for a crusher with 8 rows and 4 columns.

5. The method for optimizing dynamic balance of a pulverizer according to claim 1, characterized in that: This method is also applicable to coal pulverizers with 6-row rotors.

6. The method for optimizing dynamic balance of a pulverizer according to claim 1, characterized in that: The specific steps for optimizing the dynamic balance of a coal pulverizer with 8 rows and 8 columns are as follows: (1) Weigh the weight of each hammer head and mark it on the hammer head; (2) Arrange the hammers in order of weight from 1 to 64, with hammers of equal weight arranged in the back; (3) Place the hammer head at the corresponding position according to the arrangement diagram; (4) Arrange the third and sixth columns symmetrically; (5) Arrange the second and seventh columns symmetrically; (6) Arrange the first and eighth columns symmetrically.

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