CN111075751B - Shaft end structure, assembling device and assembling method thereof and centrifugal compressor - Google Patents
Shaft end structure, assembling device and assembling method thereof and centrifugal compressor Download PDFInfo
- Publication number
- CN111075751B CN111075751B CN201911309109.2A CN201911309109A CN111075751B CN 111075751 B CN111075751 B CN 111075751B CN 201911309109 A CN201911309109 A CN 201911309109A CN 111075751 B CN111075751 B CN 111075751B
- Authority
- CN
- China
- Prior art keywords
- shaft
- hydraulic oil
- section
- coupling
- hole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
- F04D29/053—Shafts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
- F04D29/053—Shafts
- F04D29/054—Arrangements for joining or assembling shafts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/06—Lubrication
- F04D29/063—Lubrication specially adapted for elastic fluid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/60—Mounting; Assembling; Disassembling
- F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
- F04D29/624—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
Disclosed are a shaft end structure, an assembling device thereof, an assembling method thereof and a centrifugal compressor. The shaft end comprises a first section shaft which is a conical surface, so that the diameter of one end of the first section shaft is larger than the diameter of the other end of the first section shaft, a taper hole is formed in the coupling, the diameter of one end of the taper hole is larger than the diameter of the other end of the taper hole, and the first section shaft penetrates through the taper hole and is in interference fit with the taper hole; first oiling passageway has been seted up on the first section axle, and through first oiling passageway, hydraulic oil can be filled to the interim accommodation space between first section axle and the taper hole. The shaft end structure can be obtained by assembling the shaft end and the coupling by using the assembling device and the assembling method. The centrifugal compressor comprises the shaft end structure. By the assembling device and the assembling method, interference fit between the shaft end structure and the coupling can be realized by applying hydraulic pressure, manpower resources are saved in the assembling process, and the assembling result is reliable.
Description
Technical Field
The invention relates to the technical field of mechanical assembly, in particular to a shaft end structure, an assembly method and an assembly device thereof and a centrifugal compressor.
Background
The compressor shaft end is usually equipped with the shaft coupling, in order to guarantee the joint strength of compressor shaft end and shaft coupling, generally need interference fit between compressor shaft end and the shaft coupling. At this moment, because compressor axle head, shaft coupling all are the rigidity material, in order to make interference fit compressor axle head and shaft coupling, need carry out interim flaring or make the interim necking down of compressor axle head with the shaft hole of shaft coupling usually, under this condition, after the assembly process is accomplished, can form interference fit between compressor axle head and the shaft coupling. However, in either the temporary neck-expanding of the shaft hole of the coupling or the temporary neck-reducing of the shaft end of the compressor, a large labor cost is required, and even in many cases, it is difficult to achieve an interference fit between the shaft end of the compressor and the coupling because the process of the temporary neck-expanding of the shaft hole of the coupling or the temporary neck-reducing of the shaft end of the compressor is not available.
Disclosure of Invention
In view of the above, the invention provides a shaft end structure, an assembling device and an assembling method thereof, and a centrifugal compressor, wherein the shaft end structure is improved, so that the assembling device and the assembling method can be used for realizing interference fit between the shaft end structure and a coupling by applying hydraulic pressure, manpower resources are saved in the assembling process, and the assembling result is reliable. Thereby being more practical.
In order to achieve the first object, the technical scheme of the shaft end structure provided by the invention is as follows:
the invention provides a shaft end structure which comprises a shaft end (1) and a coupling (2),
the shaft end (1) comprises a first section shaft (11), the first section shaft (11) is in a conical surface, so that the diameter of one end of the first section shaft (11) is larger than that of the other end of the first section shaft,
a taper hole (13) is arranged on the coupling (2), so that the diameter of one end of the taper hole (13) is larger than that of the other end of the taper hole (13),
the first section of shaft (11) is arranged in the taper hole (13) in a penetrating mode and is in interference fit with the taper hole;
a first oil injection channel is formed in the first section of shaft (11), and hydraulic oil can be injected into a temporary accommodating space between the first section of shaft (11) and the taper hole (13) through the first oil injection channel.
The shaft end structure provided by the invention can be further realized by adopting the following technical measures.
Preferably, the interference magnitude of the interference fit between the first section shaft (11) and the taper hole (13) ranges from 2% to 3%.
Preferably, an oil filling hole (30) and a first flow passage (12) are formed in the first section of shaft (11), the oil filling hole (30) can contain the hydraulic oil,
the oil filler hole (30) is communicated with the temporary accommodating space through the first flow passage (12).
Preferably, the first flow channel (13) has a tapered gap, and the tapered gap is inclined toward one end of the first stepped shaft (11).
Preferably, the depth of the oil hole (30) is larger than the position of a cut-off end (31) of the first flow passage (13).
Preferably, the shaft end (1) further comprises a second section shaft (16),
the second section shaft (16) is fixedly connected with the first section shaft (11),
the first oil filling channel penetrates through the second section of shaft (16) and ends at the first section of shaft (11).
Preferably, the shaft end (1) further comprises a third section shaft (19),
the third section shaft (19) is fixedly connected with the second section shaft (16),
the first oil injection channel also penetrates through the third section of shaft (19).
Preferably, the first stepped shaft (11), the second stepped shaft (16) and the third stepped shaft (19) are integrally formed.
In order to achieve the second object, the technical solution of the shaft end structure assembling device provided by the present invention is as follows:
the assembling device of the shaft end structure provided by the invention comprises a first hydraulic oil supply mechanism (7),
an oil outlet of the hydraulic oil supplied by the first hydraulic oil supply mechanism (7) is communicated with a first oil filling channel of the shaft end structure, so that the hydraulic oil can be filled into a temporary accommodating space between the first section of shaft (11) and the taper hole (13) through the first oil filling channel.
The assembling device of the shaft end structure provided by the invention can be further realized by adopting the following technical measures.
Preferably, the assembling device of the shaft end structure further comprises a filler pipe (5),
the oil filling pipe (5) is provided with a first core hole (26),
one end of the oil filling pipe (5) is connected with the first hydraulic oil supply mechanism (7),
the other end of the oil filling pipe (5) is provided with a connecting joint (6),
the oil filling pipe (5) can be fixedly connected to the first oil filling channel through the connecting joint (6), so that an oil outlet of the first hydraulic oil supply mechanism (7) is communicated with the first oil filling channel through the first core hole (26).
Preferably, the diameter of one end of the filler pipe (5) is larger than the diameter of the other end of the filler pipe (5).
Preferably, the assembling device of the shaft end structure further comprises a fixed piece (3), a movable piece (4) and a second hydraulic oil supply mechanism (8),
a second core hole (32) is arranged on the fixing piece (3), the oil filling pipe (5) is accommodated in the second core hole (32),
the fixing piece (3) can be fixedly connected to the first section shaft (11) through one end of the fixing piece;
a third core hole (33) is formed in the movable piece (4), the fixed piece (3) is accommodated in the third core hole (33), a sliding pair is formed between the inner wall of the movable piece (4) and the outer wall of the fixed piece (3), an accommodating space (22) is formed between the inner wall of the movable piece (4) and the outer wall of the fixed piece (3),
the movable piece (4) is propped against the coupling (2) through one end of the movable piece,
and a second oil injection channel (25) is formed in the moving part (4), and through the oil injection channel (25), the second hydraulic oil supply mechanism (8) can inject hydraulic oil into the accommodating space (22), so that the moving part (4) moves towards the direction of the coupling (2) to drive the coupling (2) to be pushed in the axial direction relative to one end of the first section shaft (11).
As a preference, the first and second liquid crystal compositions are,
the fixing piece (3) is a stepped shaft, a first shoulder (34) is formed at the reducing part of the stepped shaft,
the third core hole (33) is a stepped hole, a second shoulder (35) is formed at the diameter reducing part of the stepped hole,
the accommodating space is formed among the outer wall of the fixed piece (3), the inner wall of the movable piece (4), the first shoulder (34) and the second shoulder (35).
Preferably, the assembling device of the shaft end structure further comprises a first sealing member (21) and a second sealing member (23),
the first sealing element (21) is arranged between the fixed element (3) and the movable element (4) along the circumferential direction,
the second sealing element (23) is arranged between the fixed element (3) and the movable element (4) along the circumferential direction,
so that the accommodation space (22) is sealed by the first and second sealing members (21, 23).
Preferably, the assembling device of the shaft end structure further comprises a guide piece (10),
the guide piece (10) is fixedly connected to the fixed piece (3) and is stopped at the movable piece (4).
Preferably, the other end of the fixing piece (3) is provided with a third shoulder (27),
the third shoulder (27) is provided with a through hole (36),
a blind hole (37) is arranged on the moving piece (4),
the through hole (36) corresponds to the blind hole (37),
the guide piece (10) is fixedly connected to the fixing piece (3) through the through hole (36), and the guide piece (10) is simultaneously arranged in the blind hole (37) in a penetrating mode.
As a preference, the first and second liquid crystal compositions are,
the through hole (36) is a threaded hole,
the blind hole (37) is a light hole,
the guide piece (10) is a bolt
The bolt is fixedly connected to the fixing piece (3) through the threaded hole.
In order to achieve the third object, the technical solution of the method for assembling a shaft end structure provided by the present invention is as follows:
the assembling method of the shaft end structure provided by the invention is realized based on the shaft end structure provided by the invention and the assembling device of the shaft end structure provided by the invention, and the assembling method of the shaft end structure comprises the following steps:
fixing the position of the first section shaft (11);
pre-assembling the coupling (2) to the first shaft section (11) such that the interference between the conical surface of the first shaft section (11) and the conical bore (13) of the coupling (2) is 0;
connecting the first hydraulic oil supply mechanism (7) so that an oil outlet of the first hydraulic oil supply mechanism (7) is communicated with the first oil filling channel;
activating the first hydraulic oil supply mechanism (7) so that hydraulic oil supplied by the first hydraulic oil supply mechanism (7) is filled between the first section shaft (11) and the taper hole (13) through the first hydraulic oil channel;
with the increase of the dispersion amount of the hydraulic oil supplied by the first hydraulic oil supply mechanism (7) between the first section of shaft (11) and the taper hole (13), a temporary accommodating space is formed between the first section of shaft (11) and the taper hole (13), and the existence of the temporary accommodating space enables the taper hole (13) of the coupling (2) to temporarily expand the neck;
driving the coupling (2) to move towards one end of the first section shaft (11) along the axial direction;
and when the coupling (2) moves to the target position relative to the first section shaft (11), closing the first hydraulic oil supply mechanism (7) and stopping driving the coupling (2) to move.
The assembling method of the shaft end structure provided by the invention can be further realized by adopting the following technical measures.
Preferably, the target position is a position where the interference of the interference fit between the first section shaft (11) and the taper hole (13) is within a range of 2 to 3 permillage.
Preferably, the determination of the movement of the coupling (2) to the target position relative to the first section axis (11) comprises in particular the following steps:
obtaining a preassembly position A of the coupling (2)1，
Obtaining a target position A of the coupling (2)2，
According to said preassembly position A1The target position A2And the cross-sectional area of the receiving space (22) for the coupling (2) from the pre-assembly position A1Move to target position A2The required hydraulic oil supply volume V of the second hydraulic oil supply mechanism (8) is S (a)2-a1)，
Converting the volume of the hydraulic oil supplied to the second hydraulic oil supply mechanism (8) into the supply duration of the second hydraulic oil supply mechanism (8) according to the volume of the hydraulic oil output per unit time of the second hydraulic oil supply mechanism (8)
Determining that the coupling (2) is moved to a target position relative to the first section of shaft (11) when the activation period of the second hydraulic oil supply mechanism (8) reaches the duration t;
wherein V is the hydraulic oil supply volume m of the second hydraulic oil supply mechanism (8)3(ii) a S-cross sectional area, m, of the accommodation space (22)2；a1-a pre-assembly position A of the coupling (2)1The distance m from a reference point in the axial direction of the coupling (2); a is2-target position A of coupling (2)2The distance m from a reference point in the axial direction of the coupling (2); v-second hydraulic oil supply mechanism(8) Output volume m of hydraulic oil per unit time3/s。
In order to achieve the third object, the present invention provides a centrifugal compressor, comprising:
the centrifugal compressor provided by the invention comprises the shaft end structure provided by the invention.
When the shaft end structure provided by the invention and the assembling device of the shaft end structure provided by the invention are applied to assemble the shaft end structure provided by the invention, the steps comprise: fixing the position of the first section shaft 11; pre-assembling the coupling 2 to the first section shaft 11 so that the interference between the conical surface of the first section shaft 11 and the conical hole 13 of the coupling 2 is 0; the first hydraulic oil supply mechanism 7 is connected, so that an oil outlet of the first hydraulic oil supply mechanism 7 is communicated with the first oil filling channel; starting the first hydraulic oil supply mechanism 7, so that hydraulic oil supplied by the first hydraulic oil supply mechanism 7 is filled between the first section shaft 11 and the taper hole 13 through the first hydraulic oil channel; with the increase of the dispersion amount of the hydraulic oil supplied by the first hydraulic oil supply mechanism 7 between the first section shaft 11 and the taper hole 13, a temporary accommodating space is formed between the first section shaft 11 and the taper hole 13, and the existence of the temporary accommodating space enables the taper hole 13 of the coupling 2 to temporarily expand the neck, and meanwhile, the hydraulic oil is lubricated between the first section shaft 11 and the taper hole 13; the driving coupling 2 moves towards one end of the first section shaft 11 along the axial direction; until the coupling 2 moves to the target position relative to the first stub shaft 11, the first hydraulic oil supply mechanism 7 is turned off and the movement of the drive coupling 2 is stopped. Under the condition, the shaft end structure provided by the embodiment of the invention can realize the interference fit between the shaft end structure and the coupling by applying hydraulic pressure, the human resources are saved in the assembling process, and the assembling result is reliable.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
FIG. 1 is a schematic cross-sectional view of an assembly structure of a shaft end structure and an assembly device thereof after the shaft end structure is matched with the assembly device according to an embodiment of the invention;
fig. 2 is a flow chart of steps of an assembling method of a shaft end sealing structure according to an embodiment of the present invention.
Detailed Description
The invention aims to solve the problems in the prior art and provides a shaft end structure, an assembling device, an assembling method and a centrifugal compressor. Thereby being more practical.
To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description of the shaft end structure, the assembling device thereof, the assembling method thereof and the centrifugal compressor according to the present invention will be made with reference to the accompanying drawings and preferred embodiments, and the detailed description thereof will be made with reference to the following detailed description. In the following description, different "one embodiment" or "an embodiment" refers to not necessarily the same embodiment. Furthermore, the features, structures, or characteristics of one or more embodiments may be combined in any suitable manner.
The term "and/or" herein is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, with the specific understanding that: both a and B may be included, a may be present alone, or B may be present alone, and any of the three cases can be provided.
Shaft end structure embodiment
Referring to fig. 1, an embodiment of the present invention provides a shaft end structure including a shaft end 1 and a coupling 2. The shaft end 1 comprises a first section shaft 11, and the first section shaft 11 is a conical surface, so that the diameter of one end of the first section shaft 11 is larger than that of the other end of the first section shaft. The shaft coupling 2 is provided with a taper hole 13, so that the diameter of one end of the taper hole 13 is larger than that of the other end of the taper hole 13. The first section shaft 11 is arranged in the taper hole 13 in a penetrating mode and is in interference fit. First oiling passageway has been seted up on first section axle 11, and through first oiling passageway, hydraulic oil can be filled to the temporary accommodation space between first section axle 11 and the taper hole 13.
When the shaft end structure provided by the invention and the assembling device of the shaft end structure provided by the invention are applied to assemble the shaft end structure provided by the invention, the steps comprise: fixing the position of the first section shaft 11; pre-assembling the coupling 2 to the first section shaft 11 so that the interference between the conical surface of the first section shaft 11 and the conical hole 13 of the coupling 2 is 0; the first hydraulic oil supply mechanism 7 is connected, so that an oil outlet of the first hydraulic oil supply mechanism 7 is communicated with the first oil filling channel; starting the first hydraulic oil supply mechanism 7, so that hydraulic oil supplied by the first hydraulic oil supply mechanism 7 is filled between the first section shaft 11 and the taper hole 13 through the first hydraulic oil channel; with the increase of the dispersion amount of the hydraulic oil supplied by the first hydraulic oil supply mechanism 7 between the first section shaft 11 and the taper hole 13, a temporary accommodating space is formed between the first section shaft 11 and the taper hole 13, and the existence of the temporary accommodating space enables the taper hole 13 of the coupling 2 to temporarily expand the neck, and meanwhile, the hydraulic oil is lubricated between the first section shaft 11 and the taper hole 13; the driving coupling 2 moves towards one end of the first section shaft 11 along the axial direction; until the coupling 2 moves to the target position relative to the first stub shaft 11, the first hydraulic oil supply mechanism 7 is turned off and the movement of the drive coupling 2 is stopped. Under the condition, the shaft end structure provided by the embodiment of the invention can realize the interference fit between the shaft end structure and the coupling by applying hydraulic pressure, the human resources are saved in the assembling process, and the assembling result is reliable.
The interference magnitude of the interference fit between the first section shaft 11 and the taper hole 13 is 2-3 permillage. In this embodiment, the interference of the interference fit between the first section shaft 11 and the taper hole 13 is 2.5 ‰.
Wherein, the first section shaft 11 is provided with an oil hole 30 and a first flow passage 12. The oil filler hole 30 can receive hydraulic oil. The oil filler hole 30 communicates with the temporary accommodation space through the first flow passage 12. In this case, the hydraulic oil output from the first hydraulic oil supply mechanism 7 firstly enters the oil injection hole 30, then is dispersed to the first flow channel 12 through the oil injection hole 30, and finally is poured into the temporary accommodating space between the first section shaft 11 and the taper hole 13, and since the volume of the oil injection hole 30 is large, the hydraulic oil flowing out from the first hydraulic oil supply mechanism 7 can be buffered, the impact force of the high-pressure hydraulic oil flushed out from the first hydraulic oil supply mechanism 7 on the first flow channel 12 can be reduced, and therefore, the service life of the first flow channel 12 can be prolonged.
The first flow channel 13 is a tapered gap, and the tapered gap is inclined toward one end of the first section shaft 11. Since the position to be interference-fitted is closer to the end of the first section shaft 11 having a larger diameter, the hydraulic oil flowing out of the first flow passage 12 can be made to reach the target position more easily by such an inclination, and therefore, the assembly efficiency can be improved.
Wherein the depth of the oil hole 30 is larger than the position of the cut-off end 31 of the first flow passage 12. In this case, the buffer volume of the oil filler hole 30 can be increased, and at the same time, the pressure of the hydraulic oil at the cut-off end 31 reaching the first flow passage 12 can also be increased according to the principle of the communicating vessel, so that the hydraulic oil can reach the target position more easily.
Wherein the shaft end 1 further comprises a second section shaft 16. The second-stage shaft 16 is fixedly connected to the first-stage shaft 11. The first oil injection channel extends through the second section of the shaft 16 and terminates in the first section of the shaft 11. In this case, when the shaft end structure provided by the embodiment of the present invention is assembled with the assembling device thereof, the second section shaft 16 can be used for centering, and in this case, the size of the second section shaft can be increased without being limited by the size of the inner hole of the shaft end structure, so that the second section shaft can effectively bear the bending stress caused by the gravity of the second hydraulic oil supply mechanism 8, and the engaged thread of the shaft end structure is protected, so that the shaft end structure can be repeatedly used.
Wherein, the shaft end 1 further comprises a third section shaft 19. The third section shaft 19 is fixedly connected to the second section shaft 16. The first oil injection channel also extends through the third section shaft 19. In this case, the second-stage shaft 16 and the third-stage shaft 19 can be used to perform secondary alignment on the shaft end structure provided by the embodiment of the present invention and the assembling device thereof, and further bear bending stress caused by the self-gravity of the second hydraulic oil supply mechanism 8, so that the protection of the screw-fastening of the shaft end structure is more complete.
Wherein the first section shaft 11, the second section shaft 16 and the third section shaft 19 are integrally formed. In this case, there is no joint between the first section shaft 11, the second section shaft 16, and the third section shaft 19, which can reduce the stress concentration effect thereof, and therefore, the service life of the shaft end structure provided by the embodiment of the present invention can be improved.
Assembly device embodiment of shaft end structure embodiment
Referring to fig. 1, the present invention provides a mounting device for a shaft end structure including a first hydraulic oil supply mechanism 7. An oil outlet of the hydraulic oil supplied by the first hydraulic oil supply mechanism 7 is communicated with the first oil filling channel provided by the shaft end structure embodiment, so that the hydraulic oil can be filled into the temporary accommodating space between the first section shaft 11 and the taper hole 13 through the first oil filling channel.
When the shaft end structure provided by the invention and the assembling device of the shaft end structure provided by the invention are applied to assemble the shaft end structure provided by the invention, the steps comprise: fixing the position of the first section shaft 11; pre-assembling the coupling 2 to the first section shaft 11 so that the interference between the conical surface of the first section shaft 11 and the conical hole 13 of the coupling 2 is 0; the first hydraulic oil supply mechanism 7 is connected, so that an oil outlet of the first hydraulic oil supply mechanism 7 is communicated with the first oil filling channel; starting the first hydraulic oil supply mechanism 7, so that hydraulic oil supplied by the first hydraulic oil supply mechanism 7 is filled between the first section shaft 11 and the taper hole 13 through the first hydraulic oil channel; with the increase of the dispersion amount of the hydraulic oil supplied by the first hydraulic oil supply mechanism 7 between the first section shaft 11 and the taper hole 13, a temporary accommodating space is formed between the first section shaft 11 and the taper hole 13, and the existence of the temporary accommodating space enables the taper hole 13 of the coupling 2 to temporarily expand the neck, and meanwhile, the hydraulic oil is lubricated between the first section shaft 11 and the taper hole 13; the driving coupling 2 moves towards one end of the first section shaft 11 along the axial direction; until the coupling 2 moves to the target position relative to the first stub shaft 11, the first hydraulic oil supply mechanism 7 is turned off and the movement of the drive coupling 2 is stopped. Under the condition, the shaft end structure provided by the embodiment of the invention can realize the interference fit between the shaft end structure and the coupling by applying hydraulic pressure, the human resources are saved in the assembling process, and the assembling result is reliable.
Wherein the assembling device of the shaft-end structure further comprises the filler pipe 5. The filler pipe 5 is provided with a first core hole 26. One end of the filler pipe 5 is connected to the first hydraulic oil supply mechanism 7. The other end of the filler pipe 5 is provided with a connection joint 6. The oil filling pipe 5 is fixedly connectable to the first oil filling passage through the connecting joint 6 such that the oil outlet of the first hydraulic oil supply mechanism 7 communicates with the first oil filling passage through the first core hole 26. In this embodiment, the diameter of the first core hole 26 may be small as long as it can ensure that the output end of the first hydraulic oil supply mechanism 7 is contained by the first core hole 26, in this case, according to the principle that the fluid flow rate is inversely proportional to the cross-sectional area, because the diameter of the first core hole 26 is small, the flow rate of the hydraulic oil output from the output end of the first hydraulic oil supply mechanism 7 can be further increased, the pressure of the hydraulic oil output from the output end of the first hydraulic oil supply mechanism 7 can be further increased, so that the pressure of the hydraulic oil finally reaching between the first section shaft 11 and the tapered hole 13 is larger, and at this time, the neck-expanding effect on the tapered hole 13 is more prominent.
Wherein the diameter of one end of the filler pipe 5 is larger than the diameter of the other end of the filler pipe 5. In this case, since one end of the oil filling pipe 5 is connected with the first hydraulic oil supply mechanism 7, and the diameter of one end of the oil filling pipe 5 is made large, the bending stress caused by the self gravity of the first hydraulic oil supply mechanism 7 can be effectively borne, and the application stability of the assembling device of the shaft end structure provided by the embodiment of the invention is improved.
The assembling device of the shaft end structure further comprises a fixed piece 3, a movable piece 4 and a second hydraulic oil supply mechanism 8. The fixing member 3 is provided with a second core hole 32, and the oil filling pipe 5 is accommodated in the second core hole 32. The fixed member 3 can be fixedly connected to the first-stage shaft 11 by one end thereof. The movable member 4 is provided with a third core hole 33, the fixing member 3 is accommodated in the third core hole 33, the movable member 4 forms a sliding pair with the outer wall of the fixing member 3 through the inner wall thereof, and an accommodating space 22 is provided between the inner wall of the movable member 4 and the outer wall of the fixing member 3. The movable element 4 abuts against the coupling 2 via one end thereof. The movable member 4 is provided with a second oil filling passage 25, and through the oil filling passage 25, the second hydraulic oil supply mechanism 8 can inject hydraulic oil into the accommodating space 22, so that the movable member 4 moves towards the coupling 2 to drive the coupling 2 to push in the axial direction relative to one end of the first section shaft 11. Under this condition, through starting second hydraulic oil feed mechanism 8, can inject hydraulic oil into accommodation space 22 through oiling passageway 25, and then, through moving part 4 drive shaft coupling 2 impels to the great one end of first section axle diameter for first section 11 in the axial, at this moment, need not artifical drive shaft coupling 2, can further save manpower resources, improve assembly efficiency.
The fixing member 3 is a stepped shaft, and a first shoulder 34 is formed at a diameter-variable portion of the stepped shaft. The third core hole 33 is a stepped hole, and a second shoulder 35 is formed at a diameter-variable portion of the stepped hole. An accommodating space is formed between the outer wall of the fixed member 3, the inner wall of the movable member 4, the first shoulder 34 and the second shoulder 35. In this case, the accommodation space is formed so as to provide an axial force to the coupling 2.
Wherein the assembling means of the shaft end structure further comprises a first seal member 21 and a second seal member 23. The first seal member 21 is disposed between the stationary member 3 and the movable member 4 in the circumferential direction. The second seal 23 is circumferentially disposed between the stationary member 3 and the movable member 4. So that the accommodating space 22 is sealed by the first and second sealing members 21 and 23. In this case, hydraulic oil can be prevented from leaking from the gap between the outer wall of the fixed member 3 and the inner wall of the movable member 4, and hydraulic oil can be saved. In the present embodiment, the first sealing member 21 and the second sealing member 22 are made of silicone, latex or rubber, and they are easily deformed under pressure, and in general, the first sealing member 21 and the second sealing member 22 have a certain pressure, and in this case, even if the gap between the outer wall of the fixed member 3 and the inner wall of the movable member 4 is slightly worn, the wear can still be sealed because the first sealing member 21 and the second sealing member 22 have a certain rebound when the pressure is reduced, so that the sealing effect is better.
Wherein the assembly means of the shaft end structure further comprises a guide 10. The guide element 10 is fixedly connected to the stationary element 3 and terminates in the movable element 4. In this case, the movable element 4 is prevented from rotating relative to the stationary element while moving in the axial direction, and only moves in the axial direction, and the second hydraulic oil supply mechanism 8 can be prevented from rotating due to the revolution.
In this embodiment, the other end of the fixing member 3 is provided with a third shoulder 27. The third shoulder 27 is provided with a through hole 36. The movable member 4 is provided with a blind hole 37. The through hole 36 corresponds to the blind hole 37. The guide 10 is fixedly connected to the fixing member 3 through the through hole 36, and the guide 10 is simultaneously inserted into the blind hole 37. The structure is simple and easy to realize.
The through hole 36 is a threaded hole, the blind hole 37 is a unthreaded hole, and the guide 10 is a bolt fixedly connected to the fixing member 3 through the threaded hole. In this case, the assembly between the guide element 10 and the fixed element 3 and the mobile element 4 is simple and easy to implement.
Method embodiment for assembling shaft end structure
Referring to fig. 2, the method for assembling an axial end structure according to an embodiment of the present invention is implemented based on the axial end structure according to the present invention and an apparatus for assembling an axial end structure according to the present invention, and the method for assembling an axial end structure includes the following steps:
step S1: fixing the position of the first section shaft 11;
step S2: pre-assembling the coupling 2 to the first section shaft 11 so that the interference between the conical surface of the first section shaft 11 and the conical hole 13 of the coupling 2 is 0;
step S3: the first hydraulic oil supply mechanism 7 is connected, so that an oil outlet of the first hydraulic oil supply mechanism 7 is communicated with the first oil filling channel;
step S4: starting the first hydraulic oil supply mechanism 7, so that hydraulic oil supplied by the first hydraulic oil supply mechanism 7 is filled between the first section shaft 11 and the taper hole 13 through the first hydraulic oil channel;
step S5: with the increase of the dispersion amount of the hydraulic oil supplied by the first hydraulic oil supply mechanism 7 between the first section shaft 11 and the taper hole 13, a temporary accommodating space is formed between the first section shaft 11 and the taper hole 13, and the existence of the temporary accommodating space enables the taper hole 13 of the coupling 2 to temporarily expand the neck;
step S6: the driving coupling 2 moves towards one end of the first section shaft 11 along the axial direction;
step S7: until the coupling 2 moves to the target position relative to the first stub shaft 11, the first hydraulic oil supply mechanism 7 is turned off and the movement of the drive coupling 2 is stopped.
When the shaft end structure provided by the invention and the assembling device of the shaft end structure provided by the invention are applied to assemble the shaft end structure provided by the invention, the steps comprise: fixing the position of the first section shaft 11; pre-assembling the coupling 2 to the first section shaft 11 so that the interference between the conical surface of the first section shaft 11 and the conical hole 13 of the coupling 2 is 0; the first hydraulic oil supply mechanism 7 is connected, so that an oil outlet of the first hydraulic oil supply mechanism 7 is communicated with the first oil filling channel; starting the first hydraulic oil supply mechanism 7, so that hydraulic oil supplied by the first hydraulic oil supply mechanism 7 is filled between the first section shaft 11 and the taper hole 13 through the first hydraulic oil channel; with the increase of the dispersion amount of the hydraulic oil supplied by the first hydraulic oil supply mechanism 7 between the first section shaft 11 and the taper hole 13, a temporary accommodating space is formed between the first section shaft 11 and the taper hole 13, and the existence of the temporary accommodating space enables the taper hole 13 of the coupling 2 to temporarily expand the neck, and meanwhile, the hydraulic oil is lubricated between the first section shaft 11 and the taper hole 13; the driving coupling 2 moves towards one end of the first section shaft 11 along the axial direction; until the coupling 2 moves to the target position relative to the first stub shaft 11, the first hydraulic oil supply mechanism 7 is turned off and the movement of the drive coupling 2 is stopped. Under the condition, the shaft end structure provided by the embodiment of the invention can realize the interference fit between the shaft end structure and the coupling by applying hydraulic pressure, the human resources are saved in the assembling process, and the assembling result is reliable.
The target position is a position where the interference magnitude of the interference fit between the first section shaft 11 and the taper hole 13 is within a range of 2-3%. In this embodiment, the interference of the interference fit between the first section shaft 11 and the taper hole 13 is 2.5 ‰.
The step of determining that the coupling 2 moves to the target position relative to the first section shaft 11 specifically comprises the following steps:
step S701: obtaining the preassembly position A of the coupling 21，
Step S702: obtainingTarget position A of coupling 22，
Step S703: according to the preassembly position A1Target position A2And the cross-sectional area of the receiving space 22, the coupling 2 is calculated from the pre-assembly position a1Move to target position A2The required hydraulic oil supply volume V of the second hydraulic oil supply mechanism 8 is S × (a)2-a1)，
Step S704: converting the volume of the hydraulic oil supplied to the second hydraulic oil supply mechanism 8 into the duration of the supply of the second hydraulic oil supply mechanism 8 based on the output volume per unit time of the hydraulic oil supplied to the second hydraulic oil supply mechanism 8
Step S706: when the activation duration of the second hydraulic oil supply mechanism 8 reaches the duration t, determining that the coupling 2 moves to the target position relative to the first-stage shaft 11;
wherein V is the hydraulic oil supply volume, m, of the second hydraulic oil supply mechanism 83(ii) a S-Cross-sectional area, m, of the accommodation space 222；a1Preassembly position a of coupling 21The distance m from a reference point in the axial direction of the coupling 2; a is2Target position A of coupling 22The distance m from a reference point in the axial direction of the coupling 2; v-output volume m of hydraulic oil per unit time of the second hydraulic oil supply mechanism 83/s。
In this case, the start and stop of the second hydraulic oil supply mechanism 8 can be controlled more conveniently and more accurately.
Centrifugal compressor embodiment
The centrifugal compressor provided by the embodiment of the invention comprises the shaft end structure provided by the invention.
The centrifugal compressor provided by the embodiment of the invention applies the shaft end structure provided by the embodiment of the invention, wherein when the shaft end structure provided by the invention and the assembling device of the shaft end structure provided by the invention are applied to assembling the shaft end structure provided by the invention, the steps comprise: fixing the position of the first section shaft 11; pre-assembling the coupling 2 to the first section shaft 11 so that the interference between the conical surface of the first section shaft 11 and the conical hole 13 of the coupling 2 is 0; the first hydraulic oil supply mechanism 7 is connected, so that an oil outlet of the first hydraulic oil supply mechanism 7 is communicated with the first oil filling channel; starting the first hydraulic oil supply mechanism 7, so that hydraulic oil supplied by the first hydraulic oil supply mechanism 7 is filled between the first section shaft 11 and the taper hole 13 through the first hydraulic oil channel; with the increase of the dispersion amount of the hydraulic oil supplied by the first hydraulic oil supply mechanism 7 between the first section shaft 11 and the taper hole 13, a temporary accommodating space is formed between the first section shaft 11 and the taper hole 13, and the existence of the temporary accommodating space enables the taper hole 13 of the coupling 2 to temporarily expand the neck, and meanwhile, the hydraulic oil is lubricated between the first section shaft 11 and the taper hole 13; the driving coupling 2 moves towards one end of the first section shaft 11 along the axial direction; until the coupling 2 moves to the target position relative to the first stub shaft 11, the first hydraulic oil supply mechanism 7 is turned off and the movement of the drive coupling 2 is stopped. Under the condition, the shaft end structure provided by the embodiment of the invention can realize the interference fit between the shaft end structure and the coupling by applying hydraulic pressure, the human resources are saved in the assembling process, and the assembling result is reliable.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (8)
1. An assembly device for a shaft end structure, comprising:
the shaft end structure comprises a shaft end (1) and a coupling (2), wherein the shaft end (1) comprises a first section shaft (11), the first section shaft (11) is a conical surface, so that the diameter of one end of the first section shaft (11) is larger than the diameter of the other end of the first section shaft, a taper hole (13) is formed in the coupling (2), so that the diameter of one end of the taper hole (13) is larger than the diameter of the other end of the taper hole (13), and the first section shaft (11) penetrates through the taper hole (13) and is in interference fit with the taper hole (13); a first oil injection channel is formed in the first section of shaft (11), and hydraulic oil can be injected into a temporary accommodating space between the first section of shaft (11) and the taper hole (13) through the first oil injection channel;
the value range of interference magnitude of interference fit between the first section of shaft (11) and the taper hole (13) is 2-3 per thousand;
the oil outlet of the hydraulic oil supplied by the first hydraulic oil supply mechanism (7) is communicated with the first oil injection channel, so that the hydraulic oil can be filled into a temporary accommodating space between the first section of shaft (11) and the taper hole (13) through the first oil injection channel;
the oil filling pipe (5) is provided with a first core hole (26), one end of the oil filling pipe (5) is connected to the first hydraulic oil supply mechanism (7), the other end of the oil filling pipe (5) is provided with a connecting joint (6), the oil filling pipe (5) can be fixedly connected to the first oil filling channel through the connecting joint (6), and therefore an oil outlet of the first hydraulic oil supply mechanism (7) is communicated with the first oil filling channel through the first core hole (26);
the assembling device of the shaft end structure further comprises a fixing piece (3), a movable piece (4) and a second hydraulic oil supply mechanism (8), wherein a second core hole (32) is formed in the fixing piece (3), the oil injection pipe (5) is accommodated in the second core hole (32), and the fixing piece (3) can be fixedly connected to the first section of shaft (11) through one end of the fixing piece;
a third core hole (33) is arranged on the movable piece (4), the fixed piece (3) is accommodated in the third core hole (33), the movable piece (4) forms a sliding pair with the outer wall of the fixed piece (3) through the inner wall thereof, moreover, the movable piece (4) is provided with an accommodating space (22) between the inner wall thereof and the outer wall of the fixed piece (3), the movable piece (4) is propped against the coupling (2) through one end of the movable piece, a second oil filling channel (25) is arranged on the movable piece (4), the second hydraulic oil supply mechanism (8) can inject hydraulic oil into the accommodating space (22) through the second oil injection passage (25), so that the movable piece (4) moves towards the direction of the coupling (2) to drive the coupling (2) to push in the axial direction relative to one end of the first section shaft (11).
2. An assembling device of a shaft-end structure according to claim 1,
the diameter of one end of the oil filling pipe (5) is larger than that of the other end of the oil filling pipe (5);
the fixing piece (3) is a stepped shaft, a first shoulder (34) is formed at the reducing part of the stepped shaft,
the third core hole (33) is a stepped hole, a second shoulder (35) is formed at the diameter reducing part of the stepped hole,
the accommodating space is formed among the outer wall of the fixed piece (3), the inner wall of the movable piece (4), the first shoulder (34) and the second shoulder (35);
the assembling device of the shaft end structure further comprises a first sealing element (21) and a second sealing element (23),
the first sealing element (21) is arranged between the fixed element (3) and the movable element (4) along the circumferential direction,
the second sealing element (23) is arranged between the fixed element (3) and the movable element (4) along the circumferential direction,
so that the accommodation space (22) is sealed by the first and second seals (21, 23);
the assembling device of the shaft end structure also comprises a guide piece (10),
the guide piece (10) is fixedly connected to the fixed piece (3) and is stopped at the movable piece (4);
the other end of the fixing piece (3) is provided with a third shoulder (27),
the third shoulder (27) is provided with a through hole (36),
a blind hole (37) is arranged on the moving piece (4),
the through hole (36) corresponds to the blind hole (37),
the guide piece (10) is fixedly connected to the fixing piece (3) through the through hole (36), and the guide piece (10) is simultaneously arranged in the blind hole (37) in a penetrating manner;
the through hole (36) is a threaded hole,
the blind hole (37) is a light hole,
the guide (10) is a bolt,
the bolt is fixedly connected to the fixing piece (3) through the threaded hole.
3. An assembling device of a shaft-end structure according to claim 1, characterized in that the first oil gallery includes an oil filler hole (30) and a first flow passage (12), the oil filler hole (30) being capable of accommodating the hydraulic oil,
the oil filler hole (30) is communicated with the temporary accommodating space through the first flow passage (12).
4. A fitting arrangement of a shaft-end construction according to claim 3, characterized in that the first flow channel (12) presents a conical gap, which is inclined towards one end of the first section shaft (11);
the depth of the oil filling hole (30) is greater than the position of a cut-off end (31) of the first flow passage (13);
the shaft end (1) also comprises a second section shaft (16),
the second section shaft (16) is fixedly connected with the first section shaft (11),
the first oil filling channel penetrates through the second section of shaft (16) and ends at the first section of shaft (11);
the shaft end (1) also comprises a third section of shaft (19),
the third section shaft (19) is fixedly connected with the second section shaft (16),
the first oil injection channel also penetrates through the third section of shaft (19);
the first section shaft (11), the second section shaft (16) and the third section shaft (19) are integrally formed.
5. An assembling method of a shaft end structure, which is implemented based on the assembling device of a shaft end structure according to any one of claims 1 to 4, the assembling method of a shaft end structure comprising the steps of:
fixing the position of the first section shaft (11);
pre-assembling the coupling (2) to the first shaft section (11) such that the interference between the conical surface of the first shaft section (11) and the conical bore (13) of the coupling (2) is 0;
connecting the first hydraulic oil supply mechanism (7) so that an oil outlet of the first hydraulic oil supply mechanism (7) is communicated with the first oil filling channel;
activating the first hydraulic oil supply mechanism (7) so that hydraulic oil supplied by the first hydraulic oil supply mechanism (7) is filled between the first section shaft (11) and the taper hole (13) through the first hydraulic oil channel;
with the increase of the dispersion amount of the hydraulic oil supplied by the first hydraulic oil supply mechanism (7) between the first section of shaft (11) and the taper hole (13), a temporary accommodating space is formed between the first section of shaft (11) and the taper hole (13), and the existence of the temporary accommodating space enables the taper hole (13) of the coupling (2) to temporarily expand the neck;
driving the coupling (2) to move towards one end of the first section shaft (11) along the axial direction;
and when the coupling (2) moves to the target position relative to the first section shaft (11), closing the first hydraulic oil supply mechanism (7) and stopping driving the coupling (2) to move.
6. An assembling method of a shaft end structure according to claim 5, characterized in that the target position is a position where an interference of the interference fit between the first section shaft (11) and the taper hole (13) is within a range of 2% o to 3% o.
7. A method of assembling a shaft-end construction according to claim 5, characterized in that, when the assembling device of the shaft-end construction is the assembling device of the shaft-end construction according to claim 5, the step of determining that the coupling (2) is moved to the target position relative to the first section shaft (11) comprises the following steps:
obtaining a preassembly position A of the coupling (2)1，
Obtaining a target position A of the coupling (2)2，
According to said preassembly position A1The target position A2And the cross-sectional area of the receiving space (22) for the coupling (2) from the pre-assembly position A1Move to target position A2The required hydraulic oil supply volume V of the second hydraulic oil supply mechanism (8) is S (a)2-a1)，
Converting the volume of the hydraulic oil supplied to the second hydraulic oil supply mechanism (8) into the supply duration of the second hydraulic oil supply mechanism (8) according to the volume of the hydraulic oil output per unit time of the second hydraulic oil supply mechanism (8)
Determining that the coupling (2) is moved to a target position relative to the first section of shaft (11) when the activation period of the second hydraulic oil supply mechanism (8) reaches the duration t;
wherein V is the hydraulic oil supply volume m of the second hydraulic oil supply mechanism (8)3(ii) a S-cross sectional area, m, of the accommodation space (22)2；a1-a pre-assembly position A of the coupling (2)1The distance m from a reference point in the axial direction of the coupling (2); a is2-target position A of coupling (2)2The distance m from a reference point in the axial direction of the coupling (2); v-output volume m of hydraulic oil per unit time of second hydraulic oil supply mechanism (8)3/s。
8. A centrifugal compressor characterized by comprising the axial-end structure of the assembling device of the axial-end structure according to any one of claims 1 to 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911309109.2A CN111075751B (en) | 2019-12-18 | 2019-12-18 | Shaft end structure, assembling device and assembling method thereof and centrifugal compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911309109.2A CN111075751B (en) | 2019-12-18 | 2019-12-18 | Shaft end structure, assembling device and assembling method thereof and centrifugal compressor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111075751A CN111075751A (en) | 2020-04-28 |
| CN111075751B true CN111075751B (en) | 2021-10-01 |
Family
ID=70315403
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911309109.2A Active CN111075751B (en) | 2019-12-18 | 2019-12-18 | Shaft end structure, assembling device and assembling method thereof and centrifugal compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111075751B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201412396Y (en) * | 2009-05-27 | 2010-02-24 | 沈阳鼓风机集团有限公司 | Large-unit thrust disc and coupler simultaneous hydraulic dismounting structure |
| CN203098610U (en) * | 2013-01-09 | 2013-07-31 | 重庆江北机械有限责任公司 | Taper connection structure of main shaft and rotary drum of horizontal type centrifugal machine |
| CN206129917U (en) * | 2016-08-30 | 2017-04-26 | 无锡鸿海龙船机有限公司 | Sleeve oil injection coupling |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4848438B2 (en) * | 2009-02-12 | 2011-12-28 | 三菱重工業株式会社 | Rotating machine |
-
2019
- 2019-12-18 CN CN201911309109.2A patent/CN111075751B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201412396Y (en) * | 2009-05-27 | 2010-02-24 | 沈阳鼓风机集团有限公司 | Large-unit thrust disc and coupler simultaneous hydraulic dismounting structure |
| CN203098610U (en) * | 2013-01-09 | 2013-07-31 | 重庆江北机械有限责任公司 | Taper connection structure of main shaft and rotary drum of horizontal type centrifugal machine |
| CN206129917U (en) * | 2016-08-30 | 2017-04-26 | 无锡鸿海龙船机有限公司 | Sleeve oil injection coupling |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111075751A (en) | 2020-04-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2783972B2 (en) | Apparatus and method for injecting sealant into gap | |
| CN101896756B (en) | Screw connection | |
| EP1885972B1 (en) | Injection nozzle for use in pinning method and pinning method using the same | |
| CN111075751B (en) | Shaft end structure, assembling device and assembling method thereof and centrifugal compressor | |
| EP3211208A1 (en) | Common rail with variable inner volume reservoir | |
| CN205316683U (en) | Prevent joint Assembly of company and water heater of electric wall | |
| CN109736738A (en) | The anti-well kick device of thick oil thermal extraction hydraulic-driven single control | |
| CN201895201U (en) | Mounting device for shaft coupling adopting conical surface interference connection | |
| CN100400905C (en) | Pin shaft device with seal structure | |
| AU782414B2 (en) | Pilot-controlled non-return valve with connection | |
| CN204042090U (en) | A kind of axial flow is without shock buffer valve | |
| CN104453763A (en) | Sealing anchoring member for casing patching and mounting device thereof | |
| WO2008012810A3 (en) | A pipe fitting assembly and adapter therefor | |
| CN111520101A (en) | Oil pipe plugging device | |
| CN204677980U (en) | Exempt from pipeline leakage-mending device of getting angry | |
| CN212744236U (en) | Hydraulic pump and driving motor connecting mechanism | |
| US20120298364A1 (en) | Multi-phase down hole injector | |
| JP2021055774A (en) | Sealing device of pipe end part | |
| US20150167421A1 (en) | Sealing Device for Well Components | |
| CN208074386U (en) | A kind of petroleum pipeline valve that can be easily installed | |
| US11674390B2 (en) | Resin-grouted rock bolt assembly with an adapted sealing bush | |
| CN113864628A (en) | Lubricating system, lubricant injection device and lubricant injection mechanism of sintering trolley | |
| CN211450298U (en) | Check valve for electric pressure relief type grease lubricating pump | |
| US11435017B2 (en) | Device for connecting a tubular element, a combination of a device with a tubular element and a bonding compound, as well as a method for connecting the device with a tubular element | |
| CN211083171U (en) | Connecting and sealing structure of pipe fitting |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |