CN114962253A - Rotor and shaft mounting structure, claw pump and dismounting method - Google Patents

Rotor and shaft mounting structure, claw pump and dismounting method Download PDF

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Publication number
CN114962253A
CN114962253A CN202210440585.3A CN202210440585A CN114962253A CN 114962253 A CN114962253 A CN 114962253A CN 202210440585 A CN202210440585 A CN 202210440585A CN 114962253 A CN114962253 A CN 114962253A
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CN
China
Prior art keywords
rotor
expansion sleeve
shaft
driven
driving
Prior art date
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Pending
Application number
CN202210440585.3A
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Chinese (zh)
Inventor
卓峰磊
袁召明
张炯焱
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Ningbo Baosi Energy Equipment Co Ltd
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Ningbo Baosi Energy Equipment Co Ltd
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Publication date
Application filed by Ningbo Baosi Energy Equipment Co Ltd filed Critical Ningbo Baosi Energy Equipment Co Ltd
Publication of CN114962253A publication Critical patent/CN114962253A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C2/123—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with radially or approximately radially from the rotor body extending tooth-like elements, co-operating with recesses in the other rotor, e.g. one tooth
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2230/00—Manufacture
    • F04C2230/60—Assembly methods
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/20—Rotors

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)

Abstract

A mounting structure of rotor and axle which characterized in that: the tension sleeve structure comprises an expansion sleeve structure, wherein the expansion sleeve structure comprises an inner expansion sleeve, an outer expansion sleeve and an expansion sleeve pressing plate, the outer expansion sleeve is installed in an installation hole of a rotor, the inner expansion sleeve is installed in the outer expansion sleeve, a shaft is installed in the inner expansion sleeve, the installation hole of the rotor is in transition fit with the shaft, the outer expansion sleeve and an installation hole of the rotor, and the inner expansion sleeve and the shaft, the expansion sleeve pressing plate is pressed at the top end of the outer expansion sleeve and fixed with the rotor through a fastening piece and used for providing a downward pressing force for the outer expansion sleeve, and a slope is formed between the matching surface of the inner expansion sleeve and the outer expansion sleeve and used for enabling the inner expansion sleeve to deform to clamp the shaft and the outer expansion sleeve to deform to tension the rotor. The mounting structure of the rotor and the shaft has the advantages of convenience and rapidness in mounting, convenience in end face clearance adjustment and higher product yield. A claw pump and a method of assembling and disassembling the same are also provided.

Description

Rotor and shaft mounting structure, claw pump and dismounting method
Technical Field
The invention relates to the technical field of pumps, in particular to a rotor and shaft mounting structure, a claw-shaped pump and a disassembling and assembling method.
Background
Because the rotor of the oil-free claw pump needs to adjust the end surface clearance and the meshing clearance during the installation, the rotor of the existing claw pump can be installed on the shaft only by using a complex installation tool.
Secondly, because use interference fit between the rotor of present claw shape pump and the axle, therefore generally heat the rotor earlier during the installation, use the press or manpower to strike and install epaxial to the mounting hole that makes the rotor after expanding, not only waste time and energy, the installation degree of difficulty is in addition progressively increased along with the rotor needs to be installed to the growth of epaxial size length.
And thirdly, different heating time needs to be selected according to the magnitude of interference when the rotor is installed. When the interference magnitude is too large, the heating time is too long, and the potential safety hazard is increased; when the interference magnitude is smaller, the rotor runs at a high speed to cause the temperature in the compression cavity to rise, the rotor generates heat to cause the relative position of the shaft and the rotor to deviate, and the rotor is easy to damage, so the requirement on the machining precision of the mounting hole of the rotor is higher, and the machining rejection rate is higher.
In addition, the size of the end face gap between the rotor and the pump body is also very important, and influences the stability of the rotor operation. When the installation length of rotor and axle increases, because both are interference fit and through long-time installation, can make the heat of rotor reduce to lead to the magnitude of interference to increase thereupon, the installation of rotor on the axle is more difficult like this, makes the adjustment of terminal surface clearance also more difficult.
Disclosure of Invention
The invention aims to solve the technical problems that the defects of the prior art are overcome, the mounting structure of the rotor and the shaft is provided, the mounting is convenient and fast, the end surface clearance is convenient to adjust, and the product yield is high; the claw-shaped pump is convenient and quick to install, convenient to adjust the end face clearance and high in product yield; the claw-shaped pump dismounting method is free of complex mounting tools, convenient and fast to mount, convenient to adjust end face gaps and meshing gaps, and high in mounted product yield.
Compared with the prior art, the invention provides a rotor and shaft mounting structure, which is characterized in that: the tension sleeve structure comprises an expansion sleeve structure, wherein the expansion sleeve structure comprises an inner expansion sleeve, an outer expansion sleeve and an expansion sleeve pressing plate, the outer expansion sleeve is arranged in a mounting hole of a rotor, the inner expansion sleeve is arranged in the outer expansion sleeve, a shaft is arranged in the inner expansion sleeve, the mounting hole of the rotor is in transition fit with the shaft, the mounting hole of the outer expansion sleeve and the rotor, and the inner expansion sleeve and the shaft, the expansion sleeve pressing plate is pressed at the top end of the outer expansion sleeve and fixed with the rotor through a fastening piece and used for providing downward pressing force for the outer expansion sleeve, and a slope is formed in the matching surface of the inner expansion sleeve and the outer expansion sleeve and used for enabling the inner expansion sleeve to deform to clamp the shaft and the outer expansion sleeve to deform to tension the rotor.
After adopting the structure, compared with the prior art, the invention has the following advantages: the mounting structure of the rotor and the shaft abandons the interference fit structure of the mounting hole and the shaft of the traditional rotor, but adopts the transition fit structure of the mounting hole and the shaft of the rotor, and the expansion sleeve structure is skillfully arranged between the rotor and the shaft, and the mounting hole of the outer expansion sleeve and the rotor, and the inner expansion sleeve and the shaft are also in transition fit, so that the downward force can be provided for the outer expansion sleeve by utilizing the pressing force of the expansion sleeve pressing plate; the assembly parts of the whole rotor and the shaft are in transition fit structures, so that a press or manual knocking is not needed during installation, the installation is convenient and rapid, the end face clearance adjustment is convenient, and the product yield is high.
Preferably, the internal expansion sleeve is in a circular truncated cone shape with a narrow top and a wide bottom, and an inner hole of the external expansion sleeve is matched with the external shape of the internal expansion sleeve, so that the matching surface of the internal expansion sleeve and the external expansion sleeve has a slope. The arrangement can make the inclination arrangement simple, and the deformation of the internal expansion sleeve and the external expansion sleeve is reliable.
Preferably, the top end of the external expansion sleeve is provided with a pressing surface which is pressed against the expansion sleeve pressing plate. The arrangement is not only beneficial to the expansion sleeve pressing plate to compress the outer expansion sleeve, but also can enable the inner expansion sleeve and the outer expansion sleeve to be matched more tightly.
Preferably, a first threaded hole is formed in the abutting surface of the outer expansion sleeve. When the setting is convenient to disassemble and assemble, the outer expansion sleeve is taken out by using the pin puller.
Preferably, the rotor is provided with a second threaded hole site. Because the mounting hole of the rotor, the internal expansion sleeve and the shaft are in transition fit, and the second threaded hole is formed in the rotor, the rotor and the internal expansion sleeve can be taken out together by using the pin puller when the rotor is convenient to disassemble and assemble.
Compared with the prior art, the invention provides a claw-shaped pump, which comprises a pump body, a driving rotor, a driven rotor, a driving shaft and a driven shaft, wherein the driving shaft and the driven shaft are arranged on the pump body, and the claw-shaped pump is characterized in that: the driving rotor and the driving shaft and the driven rotor and the driven shaft are connected together through the mounting structures of the rotors and the shafts.
After adopting the structure, compared with the prior art, the invention has the following advantages: the assembly of the driving rotor and the driving shaft and the assembly of the driven rotor and the driven shaft of the claw pump adopt the rotor and shaft mounting structure, so that a press or manual knocking is not needed during mounting, the mounting is convenient and rapid, the end surface clearance is convenient to adjust, and the product yield is high.
Compared with the prior art, the invention provides a method for disassembling and assembling a claw-shaped pump, which is characterized in that: it comprises the following steps:
(1) fixing a supporting table on a workbench position, radially limiting a pump body provided with a driving shaft and a driven shaft on the table surface of the supporting table through a limiting structure, and simultaneously penetrating the driving shaft and the driven shaft into a reserved hole position of the supporting table;
(2) fixing the top ends of the driving rotor and the driven rotor with a rotor positioning plate through two rotor positioning pins respectively so as to ensure the meshing gap and the initial position of the two rotors;
(3) heating a driving rotor and a driven rotor which are fixed on a rotor positioning plate so as to enlarge mounting holes of the two rotors;
(4) a feeler gauge with set thickness is arranged on the top surface of the pump body and used for positioning the end surface gap between the rotor and the pump body;
(5) respectively installing a driving rotor and a driven rotor on a driving shaft and a driven shaft, and then removing a rotor positioning pin and a rotor positioning plate;
(6) heating the two inner expansion sleeves, respectively installing the two inner expansion sleeves on the driving shaft and the driven shaft, and then sleeving the two outer expansion sleeves outside the two inner expansion sleeves;
(7) the two expansion sleeve pressing plates are respectively fixed on the driving rotor and the driven rotor through fasteners and respectively pressed at the top ends of the two outer expansion sleeves, so that the inner expansion sleeve tightly embraces the shaft and the outer expansion sleeve tightly tightens the rotor, and the rotor and the shaft are fixed together.
After the method is adopted, compared with the prior art, the method has the following advantages: the assembling and disassembling method of the claw pump does not need to use complex assembling tools, and only needs a supporting table, a rotor positioning pin, a rotor positioning plate and a clearance gauge, and the assembling of the driving rotor and the driving shaft and the assembling of the driven rotor and the driven shaft of the claw pump adopt the rotor and shaft assembling structures, so that a press or manual knocking is not needed, the assembling is convenient and rapid, the end surface clearance is convenient to adjust, the yield of the assembled product is high, and in addition, the use of the rotor positioning plate and the rotor positioning pin is also convenient for the adjustment of the meshing clearance of the rotor.
Preferably, in the step (5), when the lower end surfaces of the driving rotor and the driven rotor coincide with the upper end surface of the feeler, the rotors are mounted in place. This arrangement ensures an end-face clearance between the rotor and the pump body.
Preferably, the internal expanding sleeve is in a circular truncated cone shape with a narrow top and a wide bottom, and in the step (6), when the upper end face of the internal expanding sleeve is flush with the upper end face of the corresponding shaft, the internal expanding sleeve is installed in place. The arrangement can enable the internal expanding sleeve to be tightly combined with the shaft, and is favorable for tightly holding the internal expanding sleeve and the shaft together after being compressed, thereby being favorable for reliably fixing the rotor and the shaft.
Preferably, the step (7) is followed by the following steps:
(8) loosening the fastening piece and taking out the expansion sleeve pressing plate;
(9) taking out the outer expansion sleeve;
(10) and taking out the rotor and the internal expansion sleeve together.
The steps are the dismounting process of the rotor and the shaft, and the dismounting method is simple, convenient and fast.
Preferably, the top end of the outer expansion sleeve is provided with a pressing surface which is pressed against the expansion sleeve pressing plate, the pressing surface is provided with a first threaded hole position which is matched with the pin puller, and the outer expansion sleeve is taken out through the pin puller and the first threaded hole position in the step (9). The arrangement of the abutting surface is not only beneficial to compressing the outer expansion sleeve, but also convenient for arranging the first threaded hole position on the abutting surface so as to utilize the pin puller to simply and quickly take out the outer expansion sleeve.
Preferably, the driving rotor and the driven rotor are respectively provided with a second threaded hole site matched with the pin puller, and in the step (10), the two rotors and the internal expansion sleeve are taken out together through the pin puller and the second threaded hole sites. The rotor is provided with a second thread hole position, and the rotor and the internal expansion sleeve can be simply and quickly taken out by utilizing the pin puller.
Description of the drawings:
FIG. 1 is a schematic view of a claw pump according to the present invention;
FIG. 2 is another schematic view of the claw pump of the present invention;
FIG. 3 is an exploded view of the claw pump of the present invention;
FIG. 4 is a schematic structural diagram of the claw pump of the present invention installed on the installation tool of the claw pump;
FIG. 5 is a cross-sectional view of FIG. 4;
FIG. 6 is a cross-sectional view of FIG. 4 with the rotor positioning pin and the rotor positioning plate removed and with the expansion sleeve structure installed;
in the figure: 1-driving rotor, 2-driven rotor, 3-internal expansion sleeve, 4-external expansion sleeve, 5-expansion sleeve pressure plate, 6-mounting hole of rotor, 7-fastener, 8-inclination, 9-pressing surface, 10-first threaded hole position, 12-pump body, 13-driving shaft, 14-driven shaft, 15-supporting table, 16-rotor positioning plate, 17-rotor positioning pin, 18-reserved hole position, 19-limiting structure, 20-upper panel, 21-lower panel, 22-side plate, 23-large hole, 24-small hole and 25-bearing.
Detailed Description
The invention is further described with reference to the following embodiments in conjunction with the accompanying drawings.
Example 1:
as shown in fig. 1-3, a rotor and shaft mounting structure comprises an expansion sleeve structure, the expansion sleeve structure comprises an inner expansion sleeve 3, an outer expansion sleeve 4 and an expansion sleeve pressing plate 5, the outer expansion sleeve 4 is mounted in a mounting hole 6 of a rotor, the inner expansion sleeve 3 is mounted in the outer expansion sleeve 4, the shaft is mounted in the inner expansion sleeve 3, the mounting hole 6 of the rotor is in transition fit with the shaft, the outer expansion sleeve 4 is in transition fit with the mounting hole 6 of the rotor, and the inner expansion sleeve 3 is fixed with the shaft, the expansion sleeve pressing plate 5 is pressed at the top end of the outer expansion sleeve 4 and fixed with the rotor through a fastener 7 for providing a downward pressing force to the outer expansion sleeve 4, and a slope 8 is formed on a matching surface of the inner expansion sleeve 3 and the outer expansion sleeve 4 for enabling the inner expansion sleeve 3 to embrace the deformation to tighten the shaft and the outer expansion sleeve 4 to deform the rotor.
The inner expansion sleeve 3 is in a round table shape with a narrow top and a wide bottom, and the inner hole of the outer expansion sleeve 4 is matched with the shape of the inner expansion sleeve 3, so that the matching surface of the inner expansion sleeve and the outer expansion sleeve has an inclination 8; the top end of the external expansion sleeve 4 is provided with a pressing surface 9 which is pressed against the expansion sleeve pressing plate 5; a first threaded hole site 10 is arranged on the abutting surface 9 of the external expansion sleeve 4; and a second threaded hole position is arranged on the rotor, and a threaded hole matched with the fastener 7 on the rotor can be directly used as the second threaded hole position, or a threaded hole additionally arranged on the rotor.
Example 2:
as shown in fig. 1 to 3, a claw pump includes a pump body 12, a driving rotor 1, a driven rotor 2, a driving shaft 13 and a driven shaft 14, wherein the driving shaft 13 and the driven shaft 14 are mounted on the pump body 12, and the driving rotor 1 and the driving shaft 13, and the driven rotor 2 and the driven shaft 14 are connected together through a rotor and shaft mounting structure in embodiment 1.
The connection structure between the driving rotor 1 and the driving shaft 13 and between the driven rotor 2 and the driven shaft 14 is as follows: two outer expansion sleeves 4 are respectively arranged in mounting holes 6 of a driving rotor 1 and a driven rotor 2, two inner expansion sleeves 3 are respectively arranged in the two outer expansion sleeves 4, a driving shaft 13 and a driven shaft 14 are respectively arranged in the two inner expansion sleeves 3, the mounting hole 6 of the driving rotor 1 is in transition fit with the driving shaft 13, the outer expansion sleeves 4 are in transition fit with the mounting hole 6 of the driving rotor 1, the inner expansion sleeves 3 are in transition fit with the driving shaft 13, the mounting hole 6 of the driven rotor 2 is in transition fit with the driven shaft 14, the outer expansion sleeves 4 are in transition fit with the mounting hole 6 of the driven rotor 2, the inner expansion sleeves 3 are in transition fit with the driven shaft 14, two expansion sleeve pressing plates 5 are respectively pressed at the top ends of the two outer expansion sleeves 4 and are fixed with the driving rotor 1 and the driven rotor 2 through fasteners 7 and used for providing downward pressing force for the two outer expansion sleeves 4, the matching surfaces of the inner expansion sleeves 3 and the outer expansion sleeves 4 have an inclination 8, used for enabling the inner expanding sleeve 3 to deform to tightly hold the shaft and the outer expanding sleeve 4 to deform to expand the rotor.
The inner expansion sleeve 3 is in a round table shape with a narrow top and a wide bottom, and the inner hole of the outer expansion sleeve 4 is matched with the shape of the inner expansion sleeve 3, so that the matching surface of the inner expansion sleeve and the outer expansion sleeve has an inclination 8; the top end of the external expansion sleeve 4 is provided with a pressing surface 9 which is pressed against the expansion sleeve pressing plate 5; a first threaded hole site 10 is arranged on the abutting surface 9 of the external expansion sleeve 4; and second thread hole positions are arranged on the driving rotor 1 and the driven rotor 2.
Example 3:
a method of attaching and detaching a claw pump, which is applied to the claw pump of embodiment 2, comprising the steps of:
(1) fixing a supporting platform 15 on a workbench position, radially limiting the pump body 12 provided with the driving shaft 13 and the driven shaft 14 on the table surface of the supporting platform 15 through a limiting structure 19, and simultaneously penetrating the driving shaft 13 and the driven shaft 14 in a reserved hole position 18 of the supporting platform 15; the radial rotation of the pump body 12 is limited, so that the rotor installation error caused by the movement of the pump body 12 in the process of installing the rotor can be prevented;
(2) the top ends of the driving rotor 1 and the driven rotor 2 are respectively fixed with a rotor positioning plate 16 through two rotor positioning pins 17 so as to ensure the meshing gap and the initial position of the two rotors and prevent the two rotors from interfering in operation;
(3) heating the driving rotor 1 and the driven rotor 2 fixed on the rotor positioning plate 16 to enlarge the mounting holes 6 of the two rotors;
(4) a feeler gauge with a set thickness is arranged on the top surface of the pump body 12 and used for positioning the end surface gap between the rotor and the pump body 12;
(5) mounting the driving rotor 1 and the driven rotor 2 on the driving shaft 13 and the driven shaft 14 respectively, and removing the rotor positioning pin 17 and the rotor positioning plate 16 as shown in FIGS. 4-5; the mounting hole 6 of the rotor is in transition fit with the shaft, and the rotor can be directly mounted in the shaft after being heated without using a press or manually knocking and pressing;
(6) heating the two inner expansion sleeves 3, respectively installing the two inner expansion sleeves on a driving shaft 13 and a driven shaft 14, and then sleeving the two outer expansion sleeves 4 outside the two inner expansion sleeves 3; because the inner expansion sleeve 3 is in transition fit with the shaft, and the fit clearance between the inner expansion sleeve 3 and the shaft is increased after the inner expansion sleeve 3 is heated, the inner expansion sleeve 3 can be easily installed on the shaft without a press or manual knocking and pressing; in addition, because the outer diameter of the outer expansion sleeve 4 is in transition fit with the mounting hole 6 of the rotor, the outer expansion sleeve 4 can be easily placed in the mounting hole 6 of the rotor and sleeved outside the inner expansion sleeve 3;
(7) two expansion sleeve pressing plates 5 are respectively fixed on the driving rotor 1 and the driven rotor 2 through fasteners 7 and respectively pressed at the top ends of two outer expansion sleeves 4, so that the inner expansion sleeve 3 tightly embraces the shaft and the outer expansion sleeve 4 tightly presses the rotor, thereby fixing the rotor and the shaft together, as shown in fig. 6.
In this embodiment, the tooling used in the method for assembling and disassembling the claw pump includes a supporting table 15, a rotor positioning plate 16, a rotor positioning pin 17 and a feeler gauge, the supporting table 15 has a table top for supporting the pump body 12, a reserved hole site 18 for penetrating the driving shaft 13 and the driven shaft 14, and a limiting structure 19 for limiting the radial rotation of the pump body 12, the feeler gauge is used for being placed between the top surface of the pump body 12 and the bottom surfaces of the two rotors to position the end surface gap between the rotors and the pump body 12, the rotor positioning plate 16 is used for being placed at the top ends of the two rotors, and the rotor positioning pin 17 is used for fixing the two rotors on the rotor positioning plate 16 to ensure the meshing gap and the initial position of the two rotors; the supporting platform 15 comprises an upper panel 20, a lower panel 21 and a side plate 22 connecting the upper panel 20 and the lower panel 21, the upper panel 20 is a table top for supporting the pump body 12, and the upper panel 20 and the lower panel 21 are both provided with reserved hole sites 18 for penetrating the driving shaft 13 and the driven shaft 14; the two reserved hole sites 18 on the upper panel 20 are stepped holes with large upper parts and small lower parts, the limiting structure 19 is a large hole 23 of the stepped hole, the large hole 23 is in transition fit with an outer ring of a bearing 25 on the pump body 12, an inner ring of the bearing 25 is in interference fit with a shaft, and the outer ring of the bearing 25 and the large hole 23 adopt a transition fit structure, so that the bearing 25 of the pump body 12 can be conveniently installed in the large hole 23 of the stepped hole, the bearing 25 installed in the large hole 23 cannot rotate, the function of fixing the pump body 12 is achieved, the driving shaft 13 and the driven shaft 14 installed on the pump body 12 cannot rotate, and the phenomenon of rotor installation errors caused by the movement of the pump body 12 in the process of installing a rotor on the shaft can be prevented; the small holes 24 of the stepped holes on the upper panel 20 are in clearance fit with corresponding shafts, and the reserved hole sites 18 on the lower panel 21 are also in clearance fit with the corresponding shafts, namely, the driving shaft 13 and the driven shaft 14 are in clearance fit with the reserved hole sites 18 on the upper panel 20 and the lower panel 21, so that the driving shaft 13 and the driven shaft 14 can penetrate through the reserved hole sites 18 on the upper panel 20 and the lower panel 21 more easily, and the pump body 12 can be fixed more conveniently and quickly.
Example 4:
as shown in fig. 4 to 6, a method of attaching and detaching a claw pump, which is applied to the claw pump of embodiment 2 and uses the same tool as that of embodiment 3, comprises the steps of:
(1) fixing a supporting platform 15 on a workbench position, radially limiting the pump body 12 provided with the driving shaft 13 and the driven shaft 14 on the table surface of the supporting platform 15 through a limiting structure 19, and simultaneously, penetrating the driving shaft 13 and the driven shaft 14 into a reserved hole position 18 of the supporting platform 15; the limiting structure 19 is a large hole 23 of the stepped hole, the bearing 25 of the pump body 12 is installed in the large hole 23 of the stepped hole, and the radial rotation of the pump body 12 can be limited due to the transition fit of the outer ring of the bearing 25 and the large hole 23;
(2) fixing the top ends of the driving rotor 1 and the driven rotor 2 with a rotor positioning plate 16 through two rotor positioning pins 17 respectively so as to ensure the meshing gap and the initial position of the two rotors;
(3) heating the driving rotor 1 and the driven rotor 2 fixed on the rotor positioning plate 16 to enlarge the mounting holes 6 of the two rotors;
(4) a feeler gauge with a set thickness is arranged on the top surface of the pump body 12 and used for positioning the end surface gap between the rotor and the pump body 12;
(5) respectively installing the driving rotor 1 and the driven rotor 2 on the driving shaft 13 and the driven shaft 14, as shown in fig. 4-5, when the lower end surfaces of the driving rotor 1 and the driven rotor 2 are coincident with the upper end surface of the feeler gauge, installing the rotors in place, and then removing the rotor positioning pin 17 and the rotor positioning plate 16;
(6) heating two inner expansion sleeves 3 and respectively installing the two inner expansion sleeves on a driving shaft 13 and a driven shaft 14, wherein the inner expansion sleeves 3 are in a round table shape with a narrow top and a wide bottom, when the upper end surfaces of the inner expansion sleeves 3 are flush with the upper end surfaces of corresponding shafts, the inner expansion sleeves 3 are installed in place, and then the two outer expansion sleeves 4 are sleeved outside the two inner expansion sleeves 3;
(7) fixing two expansion sleeve pressing plates 5 on the driving rotor 1 and the driven rotor 2 through fasteners 7 respectively, and pressing the two expansion sleeve pressing plates on the top ends of the two outer expansion sleeves 4 respectively, so that the inner expansion sleeve 3 tightly embraces the shaft and the outer expansion sleeve 4 tightly presses the rotor, thereby fixing the rotor and the shaft together, as shown in fig. 6;
(8) loosening the fastening piece 7 and taking out the expansion sleeve pressing plate 5;
(9) taking out the outer expansion sleeve 4 through the pin puller and the first threaded hole site 10;
(10) the two rotors and the internal expansion sleeve 3 are taken out together through the pin puller and the second thread hole position.

Claims (12)

1. A mounting structure of rotor and axle which characterized in that: the tension sleeve structure comprises an expansion sleeve structure, wherein the expansion sleeve structure comprises an inner expansion sleeve (3), an outer expansion sleeve (4) and an expansion sleeve pressing plate (5), the outer expansion sleeve (4) is installed in a mounting hole (6) of a rotor, the inner expansion sleeve (3) is installed in the outer expansion sleeve (4), a shaft is installed in the inner expansion sleeve (3), the mounting hole (6) of the rotor is fixed with the shaft, the outer expansion sleeve (4) and the mounting hole (6) of the rotor, and the inner expansion sleeve (3) and the shaft in a transition fit mode, the expansion sleeve pressing plate (5) is pressed on the top end of the outer expansion sleeve (4) and fixed with the rotor through a fastener (7) and used for providing downward pressing force for the outer expansion sleeve (4), and a slope (8) is arranged on the matching surface of the inner expansion sleeve (3) and the outer expansion sleeve (4) and used for enabling the inner expansion sleeve (3) to deform to clamp the shaft and the outer expansion sleeve (4) to deform the rotor.
2. A rotor and shaft mounting structure as set forth in claim 1, wherein: the inner expansion sleeve (3) is in a round table shape with a narrow top and a wide bottom, and the inner hole of the outer expansion sleeve (4) is matched with the outer shape of the inner expansion sleeve (3) so that the matching surface of the inner expansion sleeve and the outer expansion sleeve has an inclination (8).
3. A rotor and shaft mounting structure as set forth in claim 1, wherein: the top end of the outer expansion sleeve (4) is provided with a pressing surface (9) which is pressed against the expansion sleeve pressing plate (5).
4. A rotor and shaft mounting structure as set forth in claim 3, wherein: and a first thread hole position (10) is arranged on the pressing surface (9) of the outer expansion sleeve (4).
5. A rotor and shaft mounting structure as set forth in claim 1, wherein: and a second thread hole position is arranged on the rotor.
6. The utility model provides a claw shape pump, includes the pump body (12), initiative rotor (1), driven rotor (2), driving shaft (13) and driven shaft (14) are installed on the pump body (12), its characterized in that: the driving rotor (1) and the driving shaft (13) and the driven rotor (2) and the driven shaft (14) are connected together through the rotor and shaft mounting structure of any one of the claims 1 to 5.
7. A method of assembling and disassembling a claw pump, which is applied to the claw pump according to claim 6, wherein: it comprises the following steps:
(1) fixing a supporting platform (15) on a workbench position, radially limiting a pump body (12) provided with a driving shaft (13) and a driven shaft (14) on the table surface of the supporting platform (15) through a limiting structure (19), and simultaneously penetrating the driving shaft (13) and the driven shaft (14) in a reserved hole position (18) of the supporting platform (15);
(2) fixing the top ends of the driving rotor (1) and the driven rotor (2) with a rotor positioning plate (16) through two rotor positioning pins (17) respectively so as to ensure the meshing gap and the initial position of the two rotors;
(3) heating a driving rotor (1) and a driven rotor (2) which are fixed on a rotor positioning plate (16) to enlarge mounting holes (6) of the two rotors;
(4) a feeler gauge with set thickness is arranged on the top surface of the pump body (12) and used for positioning the end surface gap between the rotor and the pump body (12);
(5) respectively installing a driving rotor (1) and a driven rotor (2) on a driving shaft (13) and a driven shaft (14), and then removing a rotor positioning pin (17) and a rotor positioning plate (16);
(6) the two inner expansion sleeves (3) are heated and respectively arranged on a driving shaft (13) and a driven shaft (14), and then the two outer expansion sleeves (4) are sleeved outside the two inner expansion sleeves (3);
(7) two expansion sleeve pressure plates (5) are respectively fixed on the driving rotor (1) and the driven rotor (2) through fasteners (7) and respectively pressed at the top ends of two outer expansion sleeves (4), so that the inner expansion sleeve (3) tightly embraces the shaft and the outer expansion sleeve (4) tightly expands the rotor, and the rotor and the shaft are fixed together.
8. The method of assembling/disassembling a claw pump according to claim 7, wherein: and (5) when the lower end surfaces of the driving rotor (1) and the driven rotor (2) are superposed with the upper end surface of the clearance gauge, the rotors are installed in place.
9. The method of assembling/disassembling a claw pump according to claim 7, wherein: the inner expansion sleeve (3) is in a round table shape with a narrow top and a wide bottom, and in the step (6), when the upper end face of the inner expansion sleeve (3) is flush with the upper end face of the corresponding shaft, the inner expansion sleeve (3) is installed in place.
10. The method of assembling/disassembling a claw pump according to claim 7, wherein: the step (7) is followed by the following steps:
(8) loosening the fastening piece (7) and taking out the expansion sleeve pressing plate (5);
(9) taking out the external expansion sleeve (4);
(10) the two rotors and the internal expansion sleeve (3) are taken out together.
11. The method of assembling and disassembling a claw pump according to claim 10, wherein: the top end of the outer expansion sleeve (4) is provided with a pressing surface (9) which is abutted to the expansion sleeve pressing plate (5), the pressing surface (9) is provided with a first thread hole site (10) which is matched with the pin puller, and the outer expansion sleeve (4) is taken out through the pin puller and the first thread hole site (10) in the step (9).
12. The method of assembling and disassembling a claw pump according to claim 10, wherein: and second thread hole positions matched with the pin puller are arranged on the driving rotor (1) and the driven rotor (2), and in the step (10), the two rotors and the internal expansion sleeve (3) are taken out together through the pin puller and the second thread hole positions.
CN202210440585.3A 2022-04-12 2022-04-25 Rotor and shaft mounting structure, claw pump and dismounting method Pending CN114962253A (en)

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CN116231976A (en) * 2023-05-10 2023-06-06 广东安承动力科技有限公司 Frock is dismantled to synchronous servo motor's of permanent magnetism rotatory change rotor

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