CN113894533A - Hydraulic stretching quick installation method for main pump main bolt - Google Patents
Hydraulic stretching quick installation method for main pump main bolt Download PDFInfo
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- CN113894533A CN113894533A CN202111487689.1A CN202111487689A CN113894533A CN 113894533 A CN113894533 A CN 113894533A CN 202111487689 A CN202111487689 A CN 202111487689A CN 113894533 A CN113894533 A CN 113894533A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
- B23P19/04—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for assembling or disassembling parts
- B23P19/06—Screw or nut setting or loosening machines
- B23P19/067—Bolt tensioners
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B29/00—Accessories
- B25B29/02—Bolt tensioners
Abstract
The invention provides a hydraulic stretching quick mounting method for a main pump main bolt, which solves the technical problems that the main pump main bolt is assembled and disassembled in a bolt heater hot tightening mode at present, the time consumption is long, and the elongation is not easy to control. A hydraulic stretching quick mounting method for a main pump main bolt comprises the following steps: s1, measuring the length J0 between the upper surface of a locking device of a main bolt and the upper surface of a length measuring rod; s2, dividing a plurality of main bolts into at least two groups; s3, stretching the first group of main bolts to enable the elongation of the first group of main bolts to reach 50% of the required elongation; s4, stretching the main bolts of the second group to enable the elongation of the main bolts to reach 100% of the required elongation; s5, the main bolts of the first group are stretched again to enable the elongation of the main bolts to reach 100% of the required elongation; s6, after the two groups of main bolts are fastened, measuring residual elongation Jf3 of all the main bolts; and S7, when the elongation of the main bolts does not reach the required elongation, calculating the ratchet wheel rotating angle required to be adjusted through a formula until all the main bolts reach the required elongation.
Description
Technical Field
The invention relates to the technical field of bolt fastening, in particular to a hydraulic stretching quick mounting method for a main pump main bolt.
Background
The main pump hydraulic components are mounted on the pump casing by 24 main bolts, and the main bolts are usually fastened by means of hot stretching of the main bolt heaters, which involves repeated hot stretching of the main bolts. Through comprehensive analysis of a main pump main bolt hot stretching process for a long time, the main bolt hot stretching process has the following problems:
1. the required time is longer: during the installation of the main pump, the main bolt is heated at least 12 groups of times, and the cooling time of each group of times is calculated to be 16 hours, and the total time is 192 hours. If the elongation of the hot-tightened main bolt does not meet the requirement, the main bolt needs to be heated and adjusted again, and the elongation is confirmed after cooling, so that the required time is increased. Although the cooling after the main bolt is heated is accelerated by adopting a continuous blowing mode of a fan at present, a part of the heating section of the main bolt is assembled in the main flange, and the part cannot be directly cooled, so that a remarkable cooling effect is difficult to obtain. The time required by the main bolt heating and fastening process is long, so that the installation time of the main pump is influenced.
2. The elongation of the main bolt is not easy to control: due to the fact that the heating rods of the bolt heater are different in quality and different in operation method of operators, the extension amount of the main bolts is not easy to control due to factors such as influences of each group of main bolts on other main bolts and the main flange after heating, and the like, the pre-tightening force of each main bolt possibly has a certain difference and can meet the requirement only by repeatedly adjusting the extension amount of the main bolt.
In conclusion, the main pump main bolt is disassembled and assembled in a bolt heater hot tightening mode, and the defects that the time consumption is long in the main bolt disassembling and assembling process, the elongation is not easy to control and the like exist. For this reason, there is a need for an improvement in the drawing process for fastening the main pump main bolt in the related art.
Disclosure of Invention
The invention provides a hydraulic stretching quick mounting method for a main pump main bolt, which solves the technical problems that the main pump main bolt is assembled and disassembled in a bolt heater hot tightening mode at present, the assembling and disassembling process of the main bolt is long in time consumption, and the elongation is difficult to control.
In order to achieve the purpose, the invention adopts the following technical scheme:
a hydraulic stretching quick mounting method for a main pump main bolt comprises the following steps:
s1, measuring the length J0 between the upper surface of a locking device of a main bolt and the upper surface of a length measuring rod;
s2, dividing a plurality of main bolts into at least two groups;
s3, hydraulically stretching the main bolts of the first group to enable the elongation of the main bolts to reach 50% of the required elongation;
s4, firstly, hydraulically stretching the main bolts of the second group to enable the elongation of the main bolts to reach 100% of the required elongation;
s5, hydraulically stretching the main bolts of the first group to enable the elongation of the main bolts to reach 100% of the required elongation;
s6, after the two groups of main bolts are fastened, measuring residual elongation Jf3 of all the main bolts;
s7, when the elongation of the main bolt does not reach the required elongation, the formula is used
And
calculating the rotation angle of the ratchet wheel to be adjusted until all the main bolts reach the required elongation;
wherein the content of the first and second substances,
is the rotation angle of the ratchet wheel on the base of the hydraulic stretcher, E is the rotation angle of the ratchet wheel on the base of the hydraulic stretcher when the residual stretching amount obtained by experiments is increased or decreased by 1 unit length,
is the amount of residual stretch to be adjusted, and L is the amount of elongation required;
after calculation, when
When the number is positive, the ratchet wheel on the base needs to be rotated anticlockwise; when in use
For a negative number, the ratchet wheel on the base needs to be rotated clockwise.
In one embodiment of the present disclosure, the hydraulic tensioning of all the kingbolts of the same group is performed simultaneously.
In one embodiment of the invention, the main nut is screwed onto the main bolt before the hydraulic stretching operation, and then the hydraulic stretcher is screwed onto the main bolt.
In one embodiment of the invention, the number of the main bolts is 24, and the 24 main bolts are divided into 4 groups by taking 6 main bolts as a group.
In one embodiment of the present disclosure, the kingbolt of group 1 and group 2 is hydraulically stretched in sequence to reach 50% of the desired elongation with a torque of 100Nm for ratchet rotation, and the amount of stretching Jf 1', residual elongation Jf1, and rotation angle α 1 of the kingbolt are recorded.
In one embodiment of the present disclosure, the kingbolts of groups 3, 4, 1 and 2 are hydraulically stretched in sequence to achieve 100% of the desired elongation, and the amount of stretching Jf 2', the amount of residual elongation Jf2, and the angle of rotation α 2 of the kingbolt are recorded.
In one embodiment of the present disclosure, when the group 3 kingbolt is hydraulically tensioned, the tension of the kingbolt is 1.51 × 1.15L, and the elongation is 1.15L.
In one embodiment of the present disclosure, when the group 4 kingbolts are hydraulically tensioned, the tension of the kingbolts is 1.51 × 1.10L, so that the elongation is 1.10L.
In one embodiment of the present disclosure, when the group 1 kingbolt is hydraulically tensioned, the tension of the kingbolt is 1.51 × 1.05L, resulting in an elongation of 1.05L.
In one embodiment of the present disclosure, when the group 2 kingbolts are hydraulically tensioned, the tension of the kingbolts is 1.51 × 1.05L, resulting in an elongation of 1.05L.
Compared with the prior art, the invention has the beneficial effects that: the invention groups the main bolts, sequentially carries out hydraulic stretching on the main bolts of different groups, and finally passes through a formula
And
the ratchet wheel rotating angle required to be adjusted is calculated until all the main bolts reach the required elongation, and compared with the existing hot stretching fastening mode, the main bolt fastening mode has the advantages that the efficiency is higher, the fastening effect is better, and the elongation of the main bolts can be accurately controlled.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural view of a main bolt according to some embodiments of the present invention.
Reference numerals:
1. a main bolt; 2. a length measuring rod; 3. a sealing gasket; 4. and (4) a locking device.
Detailed Description
In the following, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate an orientation or positional relationship based on that shown in the drawings, or the orientation or positional relationship conventionally used in the use of the products of the present invention, or the orientation or positional relationship conventionally understood by those skilled in the art, are merely for convenience and simplicity of description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Furthermore, the terms "mounted," "connected," "fixed," and the like are to be construed broadly and may include, for example, fixed connections, removable connections, or integral connections; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1, the invention provides a hydraulic stretching quick mounting method of a main pump main bolt, which comprises the following steps:
s1, measuring the length J0 between the upper surface of a locking device 4 of a main bolt 1 and the upper surface of a length measuring rod 2;
s2, dividing a plurality of main bolts 1 into at least two groups;
s3, hydraulically stretching the first group of main bolts 1 to enable the elongation of the main bolts to reach 50% of the required elongation;
s4, firstly, hydraulically stretching the main bolts 1 of the second group to enable the elongation of the main bolts to reach 100% of the required elongation;
s5, hydraulically stretching the first group of main bolts 1 to enable the elongation of the main bolts to reach 100% of the required elongation;
s6, after the two groups of main bolts 1 are fastened, measuring residual elongation Jf3 of all the main bolts 1;
s7, when the elongation of the main bolt 1 does not reach the required elongation, the formula is used
And
calculating the rotation angle of the ratchet wheel to be adjusted until all the main bolts 1 reach the required elongation;
wherein the content of the first and second substances,
is the rotation angle of the ratchet wheel on the base of the hydraulic stretcher, E is the rotation angle of the ratchet wheel on the base of the hydraulic stretcher when the residual stretching amount obtained by experiments is increased or decreased by 1 unit length,
is the amount of residual stretch to be adjusted, and L is the amount of elongation required;
after calculation, when
When the number is positive, the ratchet wheel on the base needs to be rotated anticlockwise; when in use
For a negative number, the ratchet wheel on the base needs to be rotated clockwise.
It will be understood that the residual elongation is the actual elongation of the kingbolt 1 after the hydraulic tensioner is released. Since the kingbolt 1 is stretched by the hydraulic stretcher, after the hydraulic stretcher is loosened, the kingbolt 1 is retracted by a distance, that is, the kingbolt 1 is stretched by the hydraulic stretcher by an amount greater than the elongation of the kingbolt 1 after the hydraulic stretcher is loosened, and is named as a residual elongation.
It will be appreciated that when one set of king bolts 1 is hydraulically tensioned, the other set of already tightened king bolts 1 is affected, i.e. when one set of king bolts 1 is tightened, the other set of tightened king bolts 1 is stressed less and it retracts a distance, i.e. the residual elongation is reduced, which can be adjusted continuously by the above formula to gradually reach the desired elongation of all the king bolts 1. The above-mentioned 1 unit length may be 1mm, 1cm, 1dm, 1m in practice, but is usually 1 mm.
It is clear that the residual tension amount is an amount that needs to be adjusted, and then it is possible to understand Jf3-J0 as an amount that has been adjusted, i.e., in judging whether the main bolt 1 reaches the required elongation, it is possible to judge whether or not Jf3-J0 is equal to L.
In some embodiments, the hydraulic stretching operations of all the king bolts 1 of the same group are performed simultaneously. All the main bolts 1 in the same group are subjected to hydraulic stretching operation simultaneously, so that mutual influence of the main bolts 1 in the same group can be avoided, and the adjusting times of the final main bolt 1 are reduced.
In some embodiments, the hydraulic tensioning operation is preceded by screwing the main nut onto the main bolt 1 and then screwing the hydraulic tensioner onto the main bolt 1.
In some embodiments, there are 24 main bolts 1, and the 24 main bolts 1 are divided into 4 groups by grouping 6 main bolts 1.
In some embodiments, the king bolts 1 of the 1 st and 2 nd groups are hydraulically stretched in sequence to reach 50% of the desired elongation with a torque of 100Nm for ratchet rotation, and the amount of stretching Jf 1', residual elongation Jf1 and rotation angle α 1 of the king bolt 1 are recorded.
In some embodiments, the king bolts 1 of the 3 rd, 4 th, 1 st and 2 nd groups are hydraulically stretched in sequence to reach 100% of the desired elongation, and the stretching amount Jf 2', the residual elongation Jf2 and the rotation angle α 2 of the king bolt 1 are recorded.
In some embodiments, the extension of the king bolt 1 is 1.51 × 1.15L when the king bolt 1 of group 3 is hydraulically extended, resulting in an extension of 1.15L.
In some embodiments, the extension of the kingbolt 1 is 1.51 × 1.10L when the kingbolt 1 of group 4 is hydraulically extended, resulting in an extension of 1.10L.
In some embodiments, the extension of the king bolt 1 is 1.51 x 1.05L when the king bolt 1 of group 1 is hydraulically extended, resulting in an extension of 1.05L.
In some embodiments, the extension of the king bolt 1 is 1.51 x 1.05L when the king bolt 1 of group 2 is hydraulically extended, resulting in an extension of 1.05L.
The principle and the specific operation of the invention are as follows:
1. the stretching apparatus includes:
6 single-acting disc spring pistons automatically return to the hydraulic stretchers; 7 base with nut rotation ratchet device (one of them is spare); 1 hydropneumatic device; 1 piece distributor; 6 high-pressure hoses for connecting the hydraulic stretcher and the distributor; 1 high-pressure hose for connecting the hydropneumatic device and the distributor; 7 dial gauge seats are provided with 1/1000mm precision dial gauges (one set is spare).
The hydraulic tensioner is capable of providing a tensile force in order to obtain a residual elongation of the king bolt 1. The hydraulic tensioner is equipped with a piston stroke warning sign (red line) that should be avoided to exceed the maximum stroke to protect the piston seal. The base is used to support the hydraulic stretcher, is equipped with a main nut ratchet rotating device and can measure the rotation angle of the main nut.
The hydropneumatic device is equipped with 1 pressure gauge and 1 pressure setting valve. The outlet is connected with the distributor through 1 high-pressure hose, and enough oil pressure can be ensured. The distributor has 1 inlet and 6 outlets. The high-pressure hose adopts a high-pressure self-sealing quick-change connector.
2. Preparation work before fastening:
vinyl, tape, absorbent paper towels are used for protection against oil leakage into hard-to-clean areas (e.g. screw holes, and other hard-to-clean gaps).
The identity of each king bolt 1 is noted and recorded and numbered from 1 to 24. Ensuring that the screwing depth of each main bolt 1 into the screw hole is consistent.
The dimension J0 between the upper surface of the locking device 4 and the upper surface of the length measuring bar 2 of each main bolt 1 was measured using a depth micrometer, as shown in fig. 1.
And (3) installing a dial indicator, a measuring rod and a measuring head (one set is spare) on 7 dial indicator seats. And adjusting the dial indicator to enable the distance between the measuring head and the matching surface of the dial indicator seat to be J0 + 5 mm. Check the dial gauge to allow the measuring head to retract 5 mm.
The main nut is screwed onto the main bolt 1 (while preventing the main bolt 1 from following) until it comes into contact with the motor support flange and is tightened manually.
3. Installing fastening equipment:
the drawing operation of the main bolt 1 is performed in such a manner that 6 main bolts 1 are grouped. The hydraulic tensioners should be arranged on the 24 king bolts 1 in groups in batches in the following order:
group 1: 1-5-9-13-17-21;
group 2: 3-7-11-15-19-23;
group 3: 2-6-10-14-18-22;
group 4: 4-8-12-16-20-24.
Each set of king bolts 1 should be operated as follows.
The base is mounted around 6 main nuts, noting the mating of the main nuts with the ratchet teeth.
The 6 hydraulic tensioners were screwed onto the king bolt 1 until it was in contact with the base and tightened manually.
The hydraulic stretcher and the distributor are connected by a high-pressure hose, and the distributor and the hydropneumatic device are connected by the high-pressure hose.
6 dial indicators and dial indicator seats are installed. The contact condition of the measuring head of the dial indicator and the upper surface of the length measuring rod 2 is checked, and the reading of each dial indicator is returned to 0.
The hydro-pneumatic device is connected to a source of compressed air. And pulling the hose to check the connection condition of the hydraulic device.
4. Fastening the main bolt 1:
the tightening is performed in 3 stages, two fastenings and a final adjustment. In order to achieve a predetermined extension of the main bolt 1 after fastening, the extension of the main bolt 1 before releasing the pressure is longer.
At each stage, the tensile strength Jf', residual elongation Jf, and rotational angle reading α on the main nut ratcheting device read by the dial gauge are recorded and can be used to calculate the test data described below.
Step 1:
only group 1 and group 2 need to perform step 1.
The purpose of this step is to compress the sealing gasket 3 and to provide metal-to-metal contact between the surface of the hydraulic component and the pump casing flange. The main bolt 1 is fastened to 50% of the elongation.
The method comprises the following steps:
slowly increasing the pressure until the elongation stabilizes at 50% of the desired elongation:
the starting angular position is marked and the amount of bolt tension Jf 1' is recorded and the main nut is turned to tighten by operating a ratcheting sleeve on each base. The torque at which the ratchet wheel is rotated should be kept at 100 Nm.
The pressure was released completely to 0 bar. The residual elongation Jf1 and the rotation angle α 1 of the 6 king bolts 1 shown in the dial gauge are recorded.
After the first group of main bolts 1 finishes the operation, the second group of main nuts are manually fastened again and tightly attached to the motor supporting flange surface. After that, also in this way, hydraulics and a dial indicator are mounted on the second set of king bolts 1.
The second set of king bolts 1 was tensioned in the same way and the tension values Jf 1', residual elongation Jf1 and rotation angle α 1 were recorded.
Step 2:
in step 2, the fastening operation is performed in the following order: group 3, group 4, group 1 and group 2.
The kingbolt 1 is pulled to achieve a desired elongation of 100%.
The main nut is manually rotated to be tightly attached to the motor supporting handle. According to the data given in the following table, the main bolt 1 is stretched and the main nut is rotated, and the amount of stretching Jf 2' of the main bolt 1 is recorded. The pressure was released to 0bar and the residual elongation Jf2 size and the rotation angle α 2 of the 6 king bolts 1 were recorded.
Note: the 3 rd group of 6 kingbolts 1 will be subjected to the full load and therefore will be slightly more elongated, affecting the other kingbolts 1 when a new group of kingbolts 1 is tightened, so that the elongation of the groups will then be reduced.
The preferred operation is as follows:
wherein, 1.15L, 1.10L, 1.05L and 1.51 are test data in a tensile simulation test of the main bolt 1, that is, the tensile amount of the third group is 1.51 × 1.15L, and after the hydraulic tensioner is loosened, the elongation of the main bolt 1 is 1.15L, that is, the residual elongation thereof is-J0 =1.15L, and so on, and the tensile of the main bolt 1 of 4 groups is completed.
In an ideal situation, after the stretching of the 4 groups of main bolts 1 is completed according to the data in the table above, the elongation of the 3 rd group is retracted from 1.15L to 1L, the elongation of the 4 th group is retracted from 1.10L to 1L, the elongation of the 1 st group is retracted from 1.05L to 1L, and the elongation of the 2 nd group is retracted from 1.05L to 1L, that is, the elongation of the 4 groups of main bolts 1 reaches the required elongation L. Of course, in the actual implementation process, the test data of 1.15L, 1.10L, 1.05L and 1.51 of bolts with different sizes and types are different, and the respective test data can be obtained only through corresponding tests, and similarly, L is a value set according to the actual situation and the process requirements.
After the fastening of the 4 sets of the king bolts 1 was completed, the residual elongation Jf3 size of the 24 king bolts 1 was measured with a depth gauge, and Jf3-J0 was recorded and calculated.
If the required elongation of 1 or more main bolts 1 is not reached, the tightening or loosening value is determined by calculating the rotation angle (the calculation formula is as follows), and the adjustment is performed in step 3.
e is the rotation angle of the ratchet wheel on the base of the hydraulic stretcher when the residual stretching amount obtained by the experiment is increased or decreased by 1 mm;
l is the desired elongation;
after calculation, when is
When counting is positive, the ratchet wheel on the base needs to be rotated anticlockwise; when in use
For a negative number, the ratchet wheel on the base needs to be rotated clockwise.
And step 3:
and correcting the main bolts 1 which need to be tightened or loosened to meet the elongation requirement of all 24 main bolts 1, and recording the stretching amount Jf 4' and the residual elongation Jf4 of the main bolts 1.
After these operations are completed, the dial gauge and the gauge stand are removed, and the residual elongation J1 size is recorded by measuring with a depth gauge while taking into account any changes brought about during the fastening of each set of main bolts 1. Record J1-J0, if J1-J0= L, the desired elongation is reached.
If all the king-bolts 1 have reached the desired amount of elongation, the fastening device can be removed. In other cases, the main bolt 1 that needs to be tightened or loosened is corrected again.
The above embodiments describe a plurality of specific embodiments of the present invention, but it should be understood by those skilled in the art that various changes or modifications may be made to these embodiments without departing from the principle and spirit of the present invention, and these changes and modifications fall within the scope of the present invention.
Claims (10)
1. A hydraulic stretching quick mounting method for a main pump main bolt is characterized by comprising the following steps:
s1, measuring the length J0 between the upper surface of a locking device of a main bolt and the upper surface of a length measuring rod;
s2, dividing a plurality of main bolts into at least two groups;
s3, hydraulically stretching the main bolts of the first group to enable the elongation of the main bolts to reach 50% of the required elongation;
s4, firstly, hydraulically stretching the main bolts of the second group to enable the elongation of the main bolts to reach 100% of the required elongation;
s5, hydraulically stretching the main bolts of the first group to enable the elongation of the main bolts to reach 100% of the required elongation;
s6, after the two groups of main bolts are fastened, measuring residual elongation Jf3 of all the main bolts;
s7, when the elongation of the main bolt does not reach the required elongation, the formula is used
And
calculating the rotation angle of the ratchet wheel to be adjusted until all the main bolts reach the required elongation;
wherein the content of the first and second substances,
is the rotation angle of the ratchet wheel on the base of the hydraulic stretcher, E is the rotation angle of the ratchet wheel on the base of the hydraulic stretcher when the residual stretching amount obtained by experiments is increased or decreased by 1 unit length,
is the amount of residual stretch to be adjusted, and L is the amount of elongation required;
after calculation, when
When the number is positive, the ratchet wheel on the base needs to be rotated anticlockwise;
when in use
For a negative number, the ratchet wheel on the base needs to be rotated clockwise.
2. The hydraulic-tensioning quick installation method of a main pump main bolt according to claim 1, characterized in that the hydraulic-tensioning operations of all main bolts of the same group are performed simultaneously.
3. The hydraulic drawing quick installation method of a main pump main bolt according to claim 1, wherein before the hydraulic drawing operation, the main nut is screwed to the main bolt, and then the hydraulic drawing machine is screwed to the main bolt.
4. The hydraulic drawing quick mounting method of a main pump main bolt according to claim 1, wherein there are 24 main bolts, and the 24 main bolts are divided into 4 groups by grouping 6 main bolts.
5. The hydraulic-tensioning quick mounting method of a main pump main bolt according to claim 4, characterized in that the main bolts of group 1 and group 2 are hydraulically tensioned in sequence to reach 50% of the required elongation with a torque of 100Nm for ratchet rotation, and the tension amount Jf 1', the residual elongation amount Jf1 and the rotation angle α 1 of the main bolts are recorded.
6. The hydraulic-tensioning quick mounting method of a main pump main bolt according to claim 5, characterized in that the main bolts of groups 3, 4, 1 and 2 are hydraulically tensioned in sequence to reach 100% of the required elongation, and the tensioning amount Jf 2', the residual elongation Jf2 and the rotation angle α 2 of the main bolts are recorded.
7. The hydraulic-tensioning quick mounting method of a main pump main bolt according to claim 6, characterized in that, when the main bolt of group 3 is hydraulically tensioned, the tensioning amount of the main bolt is 1.51 × 1.15L, and the elongation amount is 1.15L.
8. The hydraulic-tensioning quick mounting method of a main pump main bolt according to claim 7, characterized in that, when the main bolt of group 4 is hydraulically tensioned, the tensioning amount of the main bolt is 1.51 × 1.10L, and the elongation amount is 1.10L.
9. The hydraulic-tensioning quick mounting method of a main pump main bolt according to claim 8, characterized in that, when the main bolt of group 1 is hydraulically tensioned, the tensioning amount of the main bolt is 1.51 × 1.05L, and the elongation amount is 1.05L.
10. The hydraulic-tensioning quick mounting method of a main pump main bolt according to claim 9, characterized in that, when the main bolt of group 2 is hydraulically tensioned, the tensioning amount of the main bolt is 1.51 × 1.05L, and the elongation amount is 1.05L.
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Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08323562A (en) * | 1995-05-31 | 1996-12-10 | Westfalia Nukleartechnik Gmbh & Co | Screw tightening device for screwing of cover in reaction pressure container, etc. |
| AU6127700A (en) * | 1999-09-22 | 2001-03-29 | Ishikawajima-Harima Heavy Industries Co., Ltd. | Arrangement for supplying rock bolt |
| CN201524901U (en) * | 2009-09-24 | 2010-07-14 | 大连交通大学 | Novel bolt stretching machine |
| CN101908797A (en) * | 2010-08-06 | 2010-12-08 | 天津市天发重型水电设备制造有限公司 | Press mounting method for generator stator core stretching screw |
| CN202045491U (en) * | 2010-12-30 | 2011-11-23 | 保定天威集团有限公司 | Hydraulic stretcher capable of monitoring bolt stretching amount |
| KR20110137889A (en) * | 2010-06-18 | 2011-12-26 | 대우조선해양 주식회사 | Contact test device for rudder stock |
| CN104029007A (en) * | 2014-06-13 | 2014-09-10 | 中科华核电技术研究院有限公司 | Entire bolt stretcher for nuclear reactor pressure vessels and operating process thereof |
| CN104959441A (en) * | 2015-07-03 | 2015-10-07 | 成都海光核电技术服务有限公司 | Combined type integrated drawing machine of king bolt reactor pressure vessel and use method thereof |
| CN106248488A (en) * | 2016-07-20 | 2016-12-21 | 哈尔滨电气动力装备有限公司 | Kingbolt stretching and measurement technique |
| CN107962365A (en) * | 2017-10-31 | 2018-04-27 | 沈阳透平机械股份有限公司 | The rotor assembling method of super-big and overweight with three-stage main shaft |
| CN112045400A (en) * | 2020-08-28 | 2020-12-08 | 三门核电有限公司 | Large-scale shielding main pump main bolt stretching device and stretching method |
| CN113043002A (en) * | 2021-02-24 | 2021-06-29 | 东方电气集团科学技术研究院有限公司 | Automatic bolt stretching and fastening system and method |
-
2021
- 2021-12-08 CN CN202111487689.1A patent/CN113894533B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08323562A (en) * | 1995-05-31 | 1996-12-10 | Westfalia Nukleartechnik Gmbh & Co | Screw tightening device for screwing of cover in reaction pressure container, etc. |
| AU6127700A (en) * | 1999-09-22 | 2001-03-29 | Ishikawajima-Harima Heavy Industries Co., Ltd. | Arrangement for supplying rock bolt |
| CN201524901U (en) * | 2009-09-24 | 2010-07-14 | 大连交通大学 | Novel bolt stretching machine |
| KR20110137889A (en) * | 2010-06-18 | 2011-12-26 | 대우조선해양 주식회사 | Contact test device for rudder stock |
| CN101908797A (en) * | 2010-08-06 | 2010-12-08 | 天津市天发重型水电设备制造有限公司 | Press mounting method for generator stator core stretching screw |
| CN202045491U (en) * | 2010-12-30 | 2011-11-23 | 保定天威集团有限公司 | Hydraulic stretcher capable of monitoring bolt stretching amount |
| CN104029007A (en) * | 2014-06-13 | 2014-09-10 | 中科华核电技术研究院有限公司 | Entire bolt stretcher for nuclear reactor pressure vessels and operating process thereof |
| CN104959441A (en) * | 2015-07-03 | 2015-10-07 | 成都海光核电技术服务有限公司 | Combined type integrated drawing machine of king bolt reactor pressure vessel and use method thereof |
| CN106248488A (en) * | 2016-07-20 | 2016-12-21 | 哈尔滨电气动力装备有限公司 | Kingbolt stretching and measurement technique |
| CN107962365A (en) * | 2017-10-31 | 2018-04-27 | 沈阳透平机械股份有限公司 | The rotor assembling method of super-big and overweight with three-stage main shaft |
| CN112045400A (en) * | 2020-08-28 | 2020-12-08 | 三门核电有限公司 | Large-scale shielding main pump main bolt stretching device and stretching method |
| CN113043002A (en) * | 2021-02-24 | 2021-06-29 | 东方电气集团科学技术研究院有限公司 | Automatic bolt stretching and fastening system and method |
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| CN113894533B (en) | 2022-02-18 |
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