Clearance adjusting method for diaphragm compressor

Abstract

The invention relates to the technical field of diaphragm compressors, in particular to a clearance adjusting method for a diaphragm compressor. Comprising the following steps: step (2), measuring the size C of a crankshaft shoulder and the outer end face of a crankcase by using a depth gauge; (4) measuring the size D and the size E of the front bearing seat by using a depth gauge; (5) the height size F of the middle gasket is obtained through calculation according to a formula, F = D-E + 0.n + (A1-B1) + (A2-B2), 0.n is the clearance tolerance size within the required range, and the middle gasket is machined according to the size; (6) the height size H = C-E + A2-B2-F-B1 of the second gasket is obtained through calculation according to a formula, and the second gasket is machined according to the size; after the reasonable sizes of the middle gasket and the second gasket are calculated in advance, assembling is conducted, operation is easy and convenient, accuracy is high, the assembled crankshaft can directly meet the standard clearance tolerance requirement, adjustment is not needed, and the operation accuracy and the service life of the whole diaphragm compressor are guaranteed.

Description

Technical field:

[0001] The invention relates to the technical field of diaphragm compressors, and in particular to a method for adjusting the clearance of a diaphragm compressor. Background technology:

[0002] In a diaphragm compressor, one end of the crankshaft is generally supported by a cylindrical roller bearing, and the other end is generally supported by two tapered roller bearings. Tapered roller bearings are separable bearings. Both the inner and outer rings of the bearings have tapered raceways. The inner ring and a group of tapered rollers are surrounded by a basket-shaped cage to form an inner ring assembly. The outer ring can be separated from the inner ring assembly. When subjected to axial load, a gap will be generated between the outer ring and the inner ring. In order to eliminate the gap, the thickness of the spacer is currently adjusted. On the one hand, this requires precise measurement of the zero clearance height of the bearing in order to accurately calculate the thickness of the spacer ring to achieve the purpose of eliminating the clearance. The current devices for measuring zero clearance of bearings are either too complex in structure, high in cost, and inconvenient to operate, or have poor stability and low measurement accuracy, which cannot meet the actual needs of the production process; on the other hand, the current method of adjusting the clearance of the two tapered roller bearings in the diaphragm compressor is generally to assemble them first, and then adjust the clearance by replacing the spacer ring after assembly. This method is complicated to adjust, the spacer ring is difficult to replace, and the accuracy is low. During the operation of the diaphragm compressor, the crankshaft will still shake due to the clearance problem, thereby affecting the operating accuracy and life of the entire diaphragm compressor. There is currently no good solution to the above problems.

[0003] In summary, the clearance adjustment problem of diaphragm compressors has become a technical problem that urgently needs to be solved in the industry. Summary of the invention:

[0004] In order to make up for the deficiencies of the prior art, the present invention provides a method for adjusting the clearance of a diaphragm compressor, which solves the problems of complicated clearance adjustment methods, difficult operation and low precision of the previous diaphragm compressors.

[0005] The technical solution adopted by the present invention to solve the above technical problems is:

[0006] A method for adjusting the clearance of a diaphragm compressor comprises the following steps:

[0007] Step (1): first install the first washer into the crankshaft journal, then heat the cylindrical roller bearing and install it on the crankshaft, then fix the limit plate and the crankcase with bolts, then turn the crankcase to a vertical direction, hoist the crankshaft into the crankcase, and keep the inner ring of the cylindrical roller bearing on both sides in contact with the first washer and the limit plate without gap;

[0008] Step (2): Use a depth gauge to measure the dimension C between the crankshaft shoulder and the outer end surface of the crankcase;

[0009] Step (3): using a zero clearance height measuring device to measure the bearing outer ring height dimension A1 and the bearing inner ring height dimension B1 of the first tapered roller bearing in a zero clearance state; using a zero clearance height measuring device to measure the bearing outer ring height dimension A2 and the bearing inner ring height dimension B2 of the second tapered roller bearing in a zero clearance state;

[0010] Step (4): Use a depth gauge to measure the dimensions D and E in the front bearing seat;

[0011] Step (5): Calculate the height dimension of the intermediate washer by the formula F=D-E+0.n+(A1-B1)+(A2-B2), where 0.n is the clearance tolerance dimension within the required range, and process the intermediate washer according to this dimension;

[0012] Step (6): Calculate the height dimension of the second gasket by the formula H=C-E+A2-B2-F-B1, and process the second gasket according to the dimension;

[0013] Step (7): First, install the outer rings of the first tapered roller bearing and the second tapered roller bearing into the front bearing seat to form a front bearing cover assembly, then install the second gasket into the crankshaft shaft diameter, then heat the inner ring of the first tapered roller bearing and install it into the crankshaft corresponding to its outer ring, then install the front bearing cover assembly, then install the intermediate gasket, then heat the inner ring of the second tapered roller bearing and install it into the crankshaft corresponding to its outer ring, and finally install the fastening nut.

[0014] The zero-clearance height measuring device includes a base plate, a vertical shaft is installed on the base plate, a bearing passes through the vertical shaft and is placed on the base plate, a limit plate is provided between the vertical shaft and the inner ring of the bearing, a pressure plate is provided on the top of the bearing, the edge of the pressure plate is in contact with the outer ring of the bearing, a groove is provided on the inner side of the pressure plate and does not contact the inner ring of the bearing, and the top of the vertical shaft passes through the pressure plate and extends to the outside of the pressure plate and is connected to a nut.

[0015] A plug hole is arranged at the center of the bottom plate, and the bottom shaft end of the vertical shaft is inserted into the plug hole.

[0016] The limiting plate is in the shape of a circular ring, the inner hole of the limiting plate is in contact with the vertical shaft, and the outer edge of the limiting plate is in contact with the inner ring of the bearing.

[0017] The pressure plate is a triangular plate, and the three corners of the pressure plate are evenly pressed on the outer ring of the bearing.

[0018] A washer is arranged between the nut and the pressing plate.

[0019] The torque of the nut is 60 N.m.

[0020] The present invention adopts the above scheme and has the following advantages:

[0021] The zero-clearance height measuring device is used to measure the bearing outer ring height dimension A1 and the bearing inner ring height dimension B1 of the first tapered roller bearing in the zero-clearance state, and the bearing outer ring height dimension A2 and the bearing inner ring height dimension B2 of the second tapered roller bearing in the zero-clearance state are measured. The crankshaft shoulder and the crankcase outer end surface dimension C are measured by a depth gauge, and the dimensions D and E in the front bearing seat are measured by a depth gauge. Finally, the intermediate gasket height dimension F and the second gasket height dimension H are calculated by the formula, and the intermediate gasket and the second gasket are processed according to the dimensions. After the reasonable dimensions of the intermediate gasket and the second gasket are calculated in advance, assembly is carried out. The operation is simple and the precision is high. The assembled crankshaft can directly meet the standard clearance tolerance requirements without further adjustment, thereby ensuring the operating accuracy and life of the entire diaphragm compressor.

[0022] The vertical shaft is installed on the bottom plate of the zero clearance height measuring device, and then the bearing is placed on the bottom plate through the vertical shaft, and then a limit plate is placed between the vertical shaft and the inner ring of the bearing to limit the bearing and keep the bearing concentric with the vertical shaft, and then a pressure plate is placed on the top of the bearing so that the edge of the pressure plate contacts the outer ring of the bearing, and the inner groove of the pressure plate does not contact the inner ring of the bearing. At the same time, the top of the vertical shaft passes through the pressure plate and is connected to the nut, and the nut is tightened to a certain pressure until no relative movement can be generated between the inner ring and the outer ring of the bearing, that is, at this time, the clearance of the tapered roller bearing is zero, and a depth gauge is used to measure the height A between the outer ring of the bearing and the bottom plate, and three places are measured respectively, and the average is calculated to obtain the zero clearance height value of the tapered roller bearing. The measuring device of the present invention has a simple and practical structure, low cost, simple and quick operation, good stability, high measurement accuracy, and meets the actual use requirements in the production process. Description of the drawings:

[0023] Figure 1 It is a schematic diagram of the installation structure of the initial state of the present invention.

[0024] Figure 2 It is a schematic diagram of the installation structure of the present invention in a completed state.

[0025] Figure 3 It is a structural schematic diagram of the bearing measurement of the present invention.

[0026] Figure 4 It is a structural schematic diagram of the front bearing seat measurement of the present invention.

[0027] Figure 5 It is a schematic diagram of the three-dimensional structure of the zero-clearance height measuring device of the present invention.

[0028] Figure 6 It is a schematic diagram of the top view of the structure of the zero-clearance height measuring device of the present invention.

[0029] Figure 7It is a schematic cross-sectional view of the zero-clearance height measuring device of the present invention.

[0030] In the figure, 1, base plate, 2, vertical shaft, 3, bearing, 4, inner ring, 5, outer ring, 6, limit plate, 7, pressure plate, 8, groove, 9, nut, 10, socket, 11, washer, 12, first washer, 13, crankshaft, 14, cylindrical roller bearing, 15, limit plate, 16, crankcase, 17, first tapered roller bearing, 18, second tapered roller bearing, 19, front bearing seat, 20, middle washer, 21, second washer, 22, fastening nut. Specific implementation method:

[0031] In order to clearly illustrate the technical features of the present solution, the present invention is described in detail below through specific implementation methods and in conjunction with the accompanying drawings.

[0032] like Figure 1-4 As shown, a method for adjusting the clearance of a diaphragm compressor comprises the following steps:

[0033] Step (1): first install the first washer 12 into the crankshaft 13 journal, then heat the cylindrical roller bearing 14 and install it on the crankshaft 13, then fix the limit plate 15 and the crankcase 16 with bolts, then turn the crankcase 16 to a vertical direction, hoist the crankshaft 13 into the crankcase 16, and keep the inner ring of the cylindrical roller bearing 14 on both sides in contact with the first washer 12 and the limit plate 15 without gap;

[0034] Step (2): Use a depth gauge to measure the dimension C between the shoulder of the crankshaft 13 and the outer end surface of the crankcase 16;

[0035] Step (3): using a zero clearance height measuring device to measure the bearing outer ring height dimension A1 and the bearing inner ring height dimension B1 of the first tapered roller bearing 17 in a zero clearance state; using a zero clearance height measuring device to measure the bearing outer ring height dimension A2 and the bearing inner ring height dimension B2 of the second tapered roller bearing 18 in a zero clearance state;

[0036] Step (4): Use a depth gauge to measure the dimension D and the dimension E in the front bearing seat 19;

[0037] Step (5): Calculate the height dimension of the intermediate washer 20 by the formula F=D-E+0.n+(A1-B1)+(A2-B2), where 0.n is the clearance tolerance dimension within the required range, and process the intermediate washer 20 according to the dimension;

[0038] Step (6): Calculate the height dimension of the second gasket 21 by the formula H=C-E+A2-B2-F-B1, and process the second gasket 21 according to the dimension;

[0039] Step (7): First, install the outer rings of the first tapered roller bearing 17 and the second tapered roller bearing 18 into the front bearing seat 19 to form a front bearing cover assembly, then install the second gasket 21 into the axial diameter of the crankshaft 13, then heat the inner ring of the first tapered roller bearing 17 and install it into the crankshaft 13 corresponding to its outer ring, then install the front bearing cover assembly, then install the intermediate gasket 20, then heat the inner ring of the second tapered roller bearing 18 and install it into the crankshaft 13 corresponding to its outer ring, and finally install the fastening nut 22.

[0040] like Figure 5-7 As shown, the zero-clearance height measuring device includes a base plate 1, a vertical shaft 2 is installed on the base plate 1, a bearing 3 passes through the vertical shaft 2 and is placed on the base plate 1, a limit plate 6 is provided between the vertical shaft 2 and the inner ring 4 of the bearing 3, a pressure plate 7 is provided on the top of the bearing 3, the edge of the pressure plate 7 is in contact with the outer ring 5 of the bearing 3, a groove 8 is provided on the inner side of the pressure plate 7 and does not contact the inner ring 4 of the bearing 3, and the top of the vertical shaft 2 passes through the pressure plate 7 and extends to the outside of the pressure plate and is connected with a nut 9.

[0041] The center of the bottom plate 1 is provided with an insertion hole 10 , the outer diameter of the bottom shaft end of the vertical shaft 2 is smaller than the outer diameter of the shaft body, and the bottom shaft end of the vertical shaft 2 is inserted into the insertion hole 10 to achieve installation and fixation of the vertical shaft 2 .

[0042] The limiting plate 6 is in the shape of a circular ring, the inner hole of the limiting plate 6 is in contact with the shaft body of the vertical shaft 2, the outer edge of the limiting plate 6 is in contact with the inner ring 4 of the bearing 3, and the limiting plate 6 is used to limit the vertical shaft 2 and the inner ring 4 of the bearing 3, so that the bearing 3 and the vertical shaft 2 remain concentric, avoiding the bearing 3 from being offset.

[0043] The pressure plate 7 is a triangular plate, and the three corners of the pressure plate 7 are evenly pressed on the outer ring 5 of the bearing 3, so that pressure can be evenly applied to the outer ring 5, and other positions of the outer ring 5 are exposed, which is convenient for subsequent measurement work.

[0044] A washer 11 is provided between the nut 9 and the pressure plate 7 .

[0045] The torque of the nut 9 is 60 N.m, which can apply pressure to the outer ring 5 of the bearing 3 through the pressure plate 7, so that the inner ring 4 and the outer ring 5 of the bearing 3 cannot move relative to each other and reach a zero clearance state.

[0046] Working principle of zero clearance height measuring device:

[0047] When in use, first install the vertical shaft 2 on the base plate 1, then pass the vertical shaft 2 and place the bearing 3 on the base plate 1, then place the limit plate 6 between the vertical shaft 2 and the inner ring 4 of the bearing 3 for limiting, so that the bearing 3 and the vertical shaft 2 remain concentric, and then place the pressure plate 7 on the top of the bearing 3, so that the edge of the pressure plate 7 is in contact with the outer ring 5 of the bearing 3, and at the same time, the top of the vertical shaft 2 passes through the pressure plate 7 and is connected to the nut 9, and then the nut 9 is tightened and reaches a certain pressure. The nut 9 applies pressure to the outer ring 5 through the pressure plate 7 until no relative movement can occur between the inner ring 4 and the outer ring 5 of the bearing 3, that is, the clearance of the tapered roller bearing is zero at this time. At this time, the staff uses a depth gauge to measure the height A between the outer ring 5 of the bearing 3 and the base plate 1, measures three places respectively, and calculates the average to obtain the zero clearance height value of the tapered roller bearing.

[0048] The above specific implementation manner cannot be used as a limitation on the protection scope of the present invention. For those skilled in the art, any substitution, improvement or change made to the implementation manner of the present invention falls within the protection scope of the present invention.

[0049] The matters not described in detail in the present invention are all known technologies to those skilled in the art.

Claims

1. A method for adjusting the clearance of a diaphragm compressor, characterized in that: The following steps are involved: Step (1): first install the first washer into the crankshaft journal, then heat the cylindrical roller bearing and install it on the crankshaft, then fix the limit plate and the crankcase with bolts, then turn the crankcase to a vertical direction, hoist the crankshaft into the crankcase, and keep the inner ring of the cylindrical roller bearing on both sides in contact with the first washer and the limit plate without gap; Step (2): Use a depth gauge to measure the dimension C between the crankshaft shoulder and the outer end surface of the crankcase; Step (3): using a zero clearance height measuring device to measure the bearing outer ring height dimension A1 and the bearing inner ring height dimension B1 of the first tapered roller bearing in a zero clearance state; using a zero clearance height measuring device to measure the bearing outer ring height dimension A2 and the bearing inner ring height dimension B2 of the second tapered roller bearing in a zero clearance state; Step (4): Use a depth gauge to measure the dimensions D and E in the front bearing seat; Step (5): Calculate the height dimension of the intermediate washer by the formula F=D-E+0.n+(A1-B1)+(A2-B2), where 0.n is the clearance tolerance dimension within the required range, and process the intermediate washer according to this dimension; Step (6): Calculate the height dimension of the second gasket by the formula H=C-E+A2-B2-F-B1, and process the second gasket according to the dimension; Step (7): First, install the outer rings of the first tapered roller bearing and the second tapered roller bearing into the front bearing seat to form a front bearing cover assembly, then install the second gasket into the crankshaft shaft diameter, then heat the inner ring of the first tapered roller bearing and install it into the crankshaft corresponding to its outer ring, then install the front bearing cover assembly, then install the intermediate gasket, then heat the inner ring of the second tapered roller bearing and install it into the crankshaft corresponding to its outer ring, and finally install the fastening nut.

2. A diaphragm compressor clearance adjustment method according to claim 1, characterized in that: The zero-clearance height measuring device includes a base plate, a vertical shaft is installed on the base plate, a bearing passes through the vertical shaft and is placed on the base plate, a limit plate is provided between the vertical shaft and the inner ring of the bearing, a pressure plate is provided on the top of the bearing, the edge of the pressure plate is in contact with the outer ring of the bearing, a groove is provided on the inner side of the pressure plate and does not contact the inner ring of the bearing, and the top of the vertical shaft passes through the pressure plate and extends to the outside of the pressure plate and is connected to a nut.

3. A diaphragm compressor clearance adjustment method according to claim 2, characterized in that: A plug hole is arranged at the center of the bottom plate, and the bottom shaft end of the vertical shaft is inserted into the plug hole.

4. A diaphragm compressor clearance adjustment method according to claim 2, characterized in that: The limiting plate is in the shape of a circular ring, the inner hole of the limiting plate is in contact with the vertical shaft, and the outer edge of the limiting plate is in contact with the inner ring of the bearing.

5. A diaphragm compressor clearance adjustment method according to claim 2, characterized in that: The pressure plate is a triangular plate, and the three corners of the pressure plate are evenly pressed on the outer ring of the bearing.

6. A diaphragm compressor clearance adjustment method according to claim 2, characterized in that: A washer is arranged between the nut and the pressing plate.

7. A diaphragm compressor clearance adjustment method according to claim 2, characterized in that: The torque of the nut is 60 N.m.

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