CN116639228A - Installation method of ship water jet propulsion device - Google Patents
Installation method of ship water jet propulsion device Download PDFInfo
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- CN116639228A CN116639228A CN202310792505.5A CN202310792505A CN116639228A CN 116639228 A CN116639228 A CN 116639228A CN 202310792505 A CN202310792505 A CN 202310792505A CN 116639228 A CN116639228 A CN 116639228A
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- water jet
- jet propulsion
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 128
- 238000009434 installation Methods 0.000 title claims abstract description 64
- 238000000034 method Methods 0.000 title claims abstract description 48
- 238000005507 spraying Methods 0.000 claims abstract description 36
- 238000005096 rolling process Methods 0.000 claims abstract description 4
- 238000007789 sealing Methods 0.000 claims description 62
- 239000007921 spray Substances 0.000 claims description 26
- 230000008878 coupling Effects 0.000 claims description 13
- 238000010168 coupling process Methods 0.000 claims description 13
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- 230000008569 process Effects 0.000 claims description 13
- 229910000831 Steel Inorganic materials 0.000 claims description 12
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- 239000003921 oil Substances 0.000 claims description 10
- 238000005286 illumination Methods 0.000 claims description 6
- 238000005259 measurement Methods 0.000 claims description 6
- 239000004593 Epoxy Substances 0.000 claims description 5
- 238000012937 correction Methods 0.000 claims description 5
- 238000005553 drilling Methods 0.000 claims description 5
- 238000003466 welding Methods 0.000 claims description 5
- 239000010720 hydraulic oil Substances 0.000 claims description 4
- 238000007689 inspection Methods 0.000 claims description 4
- 238000003754 machining Methods 0.000 claims description 4
- 230000003287 optical effect Effects 0.000 claims description 4
- 238000004080 punching Methods 0.000 claims description 4
- 230000003014 reinforcing effect Effects 0.000 claims description 4
- 238000007665 sagging Methods 0.000 claims description 4
- 238000007790 scraping Methods 0.000 claims description 4
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- 230000007547 defect Effects 0.000 description 2
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B73/00—Building or assembling vessels or marine structures, e.g. hulls or offshore platforms
- B63B73/20—Building or assembling prefabricated vessel modules or parts other than hull blocks, e.g. engine rooms, rudders, propellers, superstructures, berths, holds or tanks
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H11/00—Marine propulsion by water jets
- B63H11/02—Marine propulsion by water jets the propulsive medium being ambient water
- B63H11/04—Marine propulsion by water jets the propulsive medium being ambient water by means of pumps
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T70/00—Maritime or waterways transport
- Y02T70/10—Measures concerning design or construction of watercraft hulls
Abstract
The application belongs to a method for installing a water jet propulsion device of a ship, belonging to the technical field of ship parts. The installation method of the ship water jet propulsion device comprises the following installation steps: when a water spraying pump of the ship water spraying propulsion device is installed, a pump shaft is hung on a boring frame platform by a hanging frame and is installed on a pump body, and the front end of the pump shaft is wrapped by canvas so as to avoid damage during hanging; the water spraying pump is hung on a handcart by a water spraying pump hanging bracket, the center position of the pump shaft is adjusted to coincide with the center of the shaft system boring hole, the water spraying pump and the pump shaft horizontally and stably move to the bow, and when the water spraying pump and the pump shaft move to a component flange, the pump shaft is penetrated into the pump shaft tube at the moment, and the pump shaft tube are not in intense collision; when the pump shaft extends out of the pump shaft tube, the pump shaft is placed on the rolling bearing to slide in parallel until the pump shaft is placed on the middle bearing. The installation method of the ship water jet propulsion device has simple steps, realizes the installation flow and standardization of the water jet pump, improves the follow-up debugging and use assurance of the water jet pump, and improves the installation convenience and reliability.
Description
Technical Field
The application belongs to the technical field of ship parts, and particularly relates to a method for installing a water jet propulsion device of a ship.
Background
The existing ship spray pump installation methods are more, and the installation effect cannot be effectively ensured because of more spray pumps of different types. The technology provides a technology for mounting an impeller cover of a ship water jet propulsion device and a tool, which are named as a technology and a tool for mounting the impeller cover of the ship water jet propulsion device in the prior art, wherein the technology is disclosed as 101962065A. When the tool is adopted for installing the impeller cover, the tool and the impeller cover are connected into a coaxial whole, the whole is installed on a tail sealing plate of the ship body through an adjusting device, and the tool and the impeller cover are respectively positioned inside and outside the tail sealing plate of the ship body; after the shaft tube and the water jet propulsion device are coaxial by the adjusting device, epoxy pouring is carried out on the tail sealing plate and the impeller cover, and then the tool is disassembled, so that the impeller cover is accurately positioned and mounted on the tail sealing plate of the ship body. The application greatly improves the positioning and mounting precision of the impeller cover of the water jet propulsion device, simplifies the mounting process and reduces the mounting time.
However, this technique does not relate to the technical problem and technical solution of the present application.
Disclosure of Invention
The technical problems to be solved by the application are as follows: aiming at the defects of the prior art, the installation method of the marine water jet propulsion device is simple in steps, realizes the installation flow and standardization of the water jet pump, improves the follow-up debugging and use assurance of the water jet pump, and improves the installation convenience and reliability.
The technical scheme adopted by the application is as follows:
the application relates to a method for installing a water jet propulsion device of a ship, which comprises the following steps:
s1, when a water spray pump of a ship water spray propulsion device is installed, a pump shaft is hung on a boring frame platform by a hanging frame and is installed on a pump body, and the front end of the pump shaft is wrapped by canvas so as to avoid damage during hanging; the water spraying pump is hung on a handcart by a water spraying pump hanging bracket, the center position of the pump shaft is adjusted to coincide with the center of the shaft system boring hole, the water spraying pump and the pump shaft horizontally and stably move to the bow, and when the water spraying pump and the pump shaft move to a component flange, the pump shaft is penetrated into the pump shaft tube at the moment, and the pump shaft tube are not in intense collision; when the pump shaft extends out of the pump shaft tube, the pump shaft is placed on the rolling bearing to slide in parallel until the pump shaft is placed on the middle bearing;
s2, when the stern seal plate and the guide vane body flange are mounted, the terrace die is evenly formed on the joint surface of the reinforcing ring of the stern seal plate and the guide vane body flange, and the thickness is less than or equal to 0.5mm. The component flange is connected with the tail sealing plate by bolts, and the bolts are symmetrically and uniformly screwed; adjusting the position of the intermediate bearing, and checking that the gap between the inner surface of the pump shell and the blade tip is 0.7-0.9 mm;
s3, mounting a pump shaft sealing device: the pump shaft sealing device connecting flange is sleeved on the pump shaft, the gap between the inner hole of the flange and the pump shaft is uniformly distributed along the circumference by using an adjusting screw, and the gap is fixed with the bulkhead by using a bolt, and all parts of the sealing device are sleeved in sequence; re-measuring the gap between the blade tip and the pump shell after water is discharged, if the gap variation is found to be larger, adjusting the position of the middle bearing of the pump shaft, and readjusting the pump shaft sealing device;
s4, pouring the middle filling piece according to an epoxy pouring process, tightening a bolt after pouring, transferring the pump shaft, and checking that the maximum offset of the pump shaft is less than or equal to 0.3mm at a shaft seal position.
The method for installing the ship water jet propulsion device comprises the following steps in sequence: the method comprises the steps of shafting stay wire, impeller shaft protecting pipe installation, shafting light, boring a flange plane of a stern seal plate, an inner hole and an inner end face of a runner, water spraying pump installation, pump shaft watertight compartment device installation, middle bearing, compartment sealing, tooth-shaped coupling and compensation short shaft installation, shafting centering according to shafting centering process requirements after water spraying pump drainage, installation of a fixed shafting part, positioning and installation of a main engine gearbox, and installation of a water spraying propulsion device.
When the shafting is pulled, the purpose is to locate the intersection of the pump shaft center line and the flow channel center line and check the position of the engine base panel of the main engine gearbox; the center of the stay wire is intersected with the center of the runner; the deviation between the center line of the shafting and the center line of the ship is not more than +/-3 mm.
When the impeller shaft protection tube is installed, the impeller shaft protection tube penetrates into the pump shaft tube, the length of the impeller shaft protection tube is larger than 200mm, the sacrificial anode seat is burned on the pump shaft tube in advance, the perforated part of the pump shaft tube in the flow passage is welded, the seal is required by welding, and then the length of the redundant tail tube is cut off.
When the shaft system is in illumination, on the basis of centering through the shaft system stay wire, the central line of the shaft system is determined by adopting the illumination energy standard of the projector; and positioning the middle bearing, and positioning and fixing the correct position according to the shaft system centering. A movable cross light finding target is arranged on a stern sealing plate and a bulkhead, a light instrument is arranged behind a stern pull frame, a machining circle and an inspection circle are drawn on a matched part after light is given, and a circle punching hole is formed.
When boring the flange plane of the stern seal plate and the inner end surface of the central hole and the flow channel, firstly performing trial boring according to the central hole of the flange of the stern seal plate by the optical center bore, and boring the central hole; scraping a flange plane of the stern sealing plate, wherein the thickness of the scraped stern sealing plate is not smaller than 10mm, and the verticality of the flange plane of the stern sealing plate to the center is less than or equal to 0.25mm; boring the inner end surface of the runner, wherein the perpendicularity of the plane of the inner end surface of the runner to the center of the axis is less than or equal to 0.3mm, and meanwhile, a gap of 1.0-2.5 mm is reserved on the plane of the impeller when the impeller shell is assembled; dismantling the bore row; and fixing a drill jig on the tail sealing plate according to the center of the screw hole of the flange of the tail sealing plate and drilling.
The hydraulic system of the water spray pump adopts antiwear hydraulic oil.
After the water jet propulsion device is installed, the pump shaft is installed, the middle bearing, the compartment seal, the tooth-shaped coupling, the adjusting short shaft and the main unit are arranged in place according to the water jet propulsion device, the middle bearing and the main unit are fixed on the base by adjusting screws, and the front end of the pump shaft is connected with the tooth-shaped coupling to form a whole; the rear flange of the main unit gear box is connected with the adjusting short shaft to form a whole; and after the water spray pump discharges water, retesting the gap of the impeller in the pump body, and if the gap meets the requirements, centering the shafting forward according to the axis of the impeller shaft.
After the shafting is pulled, the sag correction value of each measurement point after the shafting is pulled is calculated according to the following formula:
wherein:
f x-the sagging amount of the steel wire at the L point is mm; lx is the horizontal distance mm from the measuring point to the point A; the distance between the reference points of the L-bow and stern brackets is mm; p-weight per unit length of steel wire g/mMusical instrument wire, 3.95 g/m); g, steel wire tension kg; 0.99-pulley friction coefficient.
Before the water spraying pump is hoisted, checking whether the water spraying pump is intact, whether an oil seal is damaged or not, and allowing hoisting after the oil seal is checked to be qualified; the lifting of the water spraying pump uses a special lifting frame and a soft rope, the lifting rope is fixed on a lifting ring specified by equipment, and a pump shell and accessory components cannot be damaged in the lifting process; the pump body and the pump shaft are assembled on the platform, and the front end of the pump shaft is placed on the pulley yoke during assembly, so that the pump shaft is not deformed and bent; when the water spray pump is transported and assembled by using the special hanging frame, the central line of the pump shaft of the water spray pump is kept horizontal and consistent with the central line of the shaft system, and the water spray pump is gradually translated to the boat body by using the special track trolley until the water spray pump is fixed with the stern seal plate.
By adopting the technical scheme of the application, the working principle and the beneficial effects are as follows:
the method for installing the water jet propulsion device of the ship relates to the whole process of installing the water jet propulsion device of the ship, relates to a plurality of links, has strong universality, can be applied to the installation of the water jet propulsion devices of various ships, and has good installation standardization and reliable installation result. The installation method of the ship water jet propulsion device is simple in steps, realizes the installation flow and standardization of the water jet pump, improves the follow-up debugging and use assurance of the water jet pump, and improves the installation convenience and reliability.
Drawings
The following is a brief description of what is expressed in the drawings of this specification and the references in the drawings:
FIG. 1 is a schematic view of a shaft-based pull wire during installation of a marine water jet propulsion apparatus according to the present application;
FIG. 2 is a schematic view of the deflection of the axis line when the marine water jet propulsion device of the present application is installed;
FIG. 3 is a schematic diagram of a front view of a sprinkler pump lifting tool of the marine water jet propulsion apparatus of the present application;
FIG. 4 is a schematic top view of a sprinkler pump lifting tool of the marine water jet propulsion apparatus of the present application;
FIG. 5 is a schematic view of the impeller clearance measurement tool of the marine water jet propulsion apparatus of the present application when installed;
FIG. 6 is a schematic view of the shafting centering opening structure of the marine water jet propulsion device of the present application;
FIG. 7 is a schematic view of the tooth-shaped coupling of the marine water jet propulsion apparatus of the present application when installed;
FIG. 8 is a schematic view of a jacking load check arrangement of the marine water jet propulsion device of the present application when installed;
FIG. 9 is a schematic view of the evaluation of the lifting load of the marine water jet propulsion apparatus according to the present application;
Detailed Description
The following describes the shape, structure, mutual position and connection relation between parts, action of parts and working principle of the specific embodiment of the present application by describing examples in further detail:
as shown in fig. 1-9, the application relates to a method for installing a water jet propulsion device of a ship, which comprises the following steps:
s1, when a water spray pump of a ship water spray propulsion device is installed, a pump shaft is hung on a boring frame platform by a hanging frame and is installed on a pump body, and the front end of the pump shaft is wrapped by canvas so as to avoid damage during hanging; the water spraying pump is hung on a handcart by a water spraying pump hanging bracket, the center position of the pump shaft is adjusted to coincide with the center of the shaft system boring hole, the water spraying pump and the pump shaft horizontally and stably move to the bow, and when the water spraying pump and the pump shaft move to a component flange, the pump shaft is penetrated into the pump shaft tube at the moment, and the pump shaft tube are not in intense collision; when the pump shaft extends out of the pump shaft tube, the pump shaft is placed on the rolling bearing to slide in parallel until the pump shaft is placed on the middle bearing; s2, when the stern seal plate and the guide vane body flange are mounted, the terrace die is evenly formed on the joint surface of the reinforcing ring of the stern seal plate and the guide vane body flange, and the thickness is less than or equal to 0.5mm. The component flange is connected with the tail sealing plate by bolts, and the bolts are symmetrically and uniformly screwed; adjusting the position of the intermediate bearing, and checking that the gap between the inner surface of the pump shell and the blade tip is 0.7-0.9 mm; s3, mounting a pump shaft sealing device: the pump shaft sealing device connecting flange is sleeved on the pump shaft, the gap between the inner hole of the flange and the pump shaft is uniformly distributed along the circumference by using an adjusting screw, and the gap is fixed with the bulkhead by using a bolt, and all parts of the sealing device are sleeved in sequence; re-measuring the gap between the blade tip and the pump shell after water is discharged, if the gap variation is found to be larger, adjusting the position of the middle bearing of the pump shaft, and readjusting the pump shaft sealing device; s4, pouring the middle filling piece according to an epoxy pouring process, tightening a bolt after pouring, transferring the pump shaft, and checking that the maximum offset of the pump shaft is less than or equal to 0.3mm at a shaft seal position. The steps provide an improved technical scheme aiming at the defects in the prior art. The application relates to the whole installation process of a ship water jet propulsion device, and provides a brand new method which has strong universality, can be applied to the installation of the ship water jet propulsion devices of various ships, and has good installation standardization and reliable installation result. The installation method of the ship water jet propulsion device has simple steps, realizes the installation flow and standardization of the water jet pump, improves the follow-up debugging and use assurance of the water jet pump, and improves the installation convenience and reliability.
The method for installing the ship water jet propulsion device comprises the following steps in sequence: the method comprises the steps of shafting stay wire, impeller shaft protecting pipe installation, shafting light, boring a flange plane of a stern seal plate, an inner hole and an inner end face of a runner, water spraying pump installation, pump shaft watertight compartment device installation, middle bearing, compartment sealing, tooth-shaped coupling and compensation short shaft installation, shafting centering according to shafting centering process requirements after water spraying pump drainage, installation of a fixed shafting part, positioning and installation of a main engine gearbox, and installation of a water spraying propulsion device.
When the shafting is pulled, the purpose is to locate the intersection of the pump shaft center line and the flow channel center line and check the position of the engine base panel of the main engine gearbox; the center of the stay wire is intersected with the center of the runner; the deviation between the center line of the shafting and the center line of the ship is not more than +/-3 mm. The requirements for the ship body state during shafting stay wire are as follows: (1) the method is carried out under the conditions that the temperature is not greatly changed and the boat body is not exposed to sunlight. In summer, it is preferable to select cloudy days, rainy days or early and late times. The hull structure below the main deck is through, and the main welding work and the fire correction work are finished. (2) The hull base line and the theoretical center line of the hull should meet the tolerance standard. (3) And removing auxiliary brackets outside the shafting region boat body, so that the boat body is freely placed on a main bracket of the platform, and the stress of each bracket is balanced. (4) And (5) building a stay wire and a boring platform.
The attention points in the shafting wire drawing process are as follows: (1) the boat body support is strictly forbidden to move, otherwise, the longitudinal and transverse inclinations of the boat body support must be readjusted and checked to be qualified. (2) And prohibiting the equipment from being lifted out of the boat or from being lifted into the boat. (3) The vibration work and the work of making serious noise are forbidden on the boat. (4) The wire pulling work and the checking and rechecking work should be carried out under the condition that the ambient temperature is basically the same.
As shown in figure 1, the purpose of the shafting stay wire is to locate the intersection of the pump shaft center line and the flow channel center line and the recheck of the position of the main machine gearbox base panel. Taking a specific ship product as an example: head base point and head support: fr52 bulkhead is from base line 1390+ -1 mm, from midship 1600+ -3 mm, and the stay wire is at Fr40 rib position. Tail base point: on the Fr59 stern seal board, 1390+ -1 mm from the base line, 1600+ -3 mm from the midship, and the stay wire is arranged at the Fr63 rib position. The pull wire requirement of this particular embodiment: the center of the stay wire is intersected with the center of the flow channel. The distance between the center line of the checking shafting and the center line of the ship is 1600mm, and the deviation is not more than +/-3 mm. The shim thickness data was initially checked and recorded (should be between 25 and 50 mm). An intermediate bearing position is determined.
And calculating the sag correction value of each measurement point after the stay wire according to the following formula:
wherein: f x-the sagging amount of the steel wire at the L point is mm; lx is the horizontal distance mm from the measuring point to the point A; the distance between the reference points of the L-bow and stern brackets is mm; p-weight per unit length of steel wire g/mMusical instrument wire, 3.95 g/m); g-wire tension kg (hanging weight 50 kg); 0.99-pulley friction coefficient.
When the impeller shaft protection tube is installed, the impeller shaft protection tube penetrates into the pump shaft tube, the length of the impeller shaft protection tube is larger than 200mm, the sacrificial anode seat is burned on the pump shaft tube in advance, the perforated part of the pump shaft tube in the flow passage is welded, the seal is required by welding, and then the length of the redundant tail tube is cut off.
When the shaft system is in illumination, on the basis of centering through the shaft system stay wire, the central line of the shaft system is determined by adopting the illumination energy standard of the projector; and positioning the middle bearing, and positioning and fixing the correct position according to the shaft system centering. A movable cross light finding target is arranged on a stern sealing plate and a bulkhead, a light instrument is arranged behind a stern pull frame, a machining circle and an inspection circle are drawn on a matched part after light is given, and a circle punching hole is formed.
For the steps when the shafting is illuminated, the following is described in specific examples; on the basis of preliminary centering through the shafting steel wire line, the shafting center line is accurately defined by adopting the light energy of the projector. And positioning the middle bearing position. The correct position of the device is positioned and fixed according to the shaft alignment. A movable cross light finding target is arranged on the Fr59 stern sealing plate and the Fr52 bulkhead, a light instrument is arranged behind the stern pulling frame, and a processing circle and an inspection circle respectively drawn by the light instrument after light irradiation are respectively punched with a circle punching hole.
When boring the flange plane of the stern seal plate and the inner end surface of the central hole and the flow channel, firstly, trial boring is carried out according to the optical center bore to adjust the boring precision to 0.1-0.3 mm, and finally, the hole is bored to phi 1102 (tolerance 0-0.165) mm; scraping the flange plane of the stern sealing plate to 1270mm, wherein the thickness of the stern sealing plate after scraping is not smaller than 10mm, and the verticality (deflection) of the flange plane of the stern sealing plate to the center is less than or equal to 0.25mm; boring the inner end surface of the runner, wherein the perpendicularity (deflection) of the inner end surface of the runner to the center of the axis is less than or equal to 0.3mm, and meanwhile, a gap of 1.0-2.5 mm is reserved on the impeller surface when the impeller shell is assembled; dismantling the bore row; and fixing a drill jig on the tail sealing plate according to the center of the screw hole of the flange of the tail sealing plate and drilling. For boring the flange plane of the stern transom plate and the inner end surface of the central hole and the runner, the following specific embodiments are described: (1) and (3) performing trial boring according to the central hole of the flange of the tail sealing plate of the optical central bore, aligning the boring precision to 0.1-0.3 mm, and finally boring the hole to phi 1102 mm (tolerance 0-0.165). (2) The thickness of the scraped tail sealing plate is not smaller than 10mm until the outer plane of the scraped tail sealing plate reaches 1270mm, and the verticality (deflection) of the plane to the center is less than or equal to 0.25mm, and the scraped tail sealing plate is inspected by a special tool. (3) Boring the inner end surface of the runner, wherein the verticality (deflection) of the plane to the axial center is less than or equal to 0.3mm, and meanwhile, a gap of 1.0-2.5 mm is reserved on the plane when the impeller shell is assembled. (4) And removing the chamber row. (5) And fixing a drilling jig on the tail sealing plate according to the center of the flange screw hole of the tail sealing plate and drilling.
The hydraulic system of the water spray pump adopts antiwear hydraulic oil. Specific examples: HV46 antiwear hydraulic oil was used. The system oil is fed under the guidance of equipment, and the cleanliness of the oil liquid of the system after the oil feeding is required to be equal to or better than that of an I SO15/12 (equivalent to SAE4 or NAS 7) NAS7 level.
Specific examples: and (3) mounting the stern seal plate and the guide vane body flange, namely uniformly coating the surface of the stern seal plate reinforcing ring and the joint surface of the guide vane body flange with the Letai adhesive, wherein the thickness is less than or equal to 0.5mm. And (3) connecting the component flange with the tail sealing plate by using M24 bolts, and symmetrically and uniformly screwing the bolts, wherein the screwing torque is 220Nm. And (3) installing the pump shaft sealing device, namely sleeving a pump shaft sealing device connecting flange on the pump shaft, uniformly arranging gaps between the inner hole of the flange and the pump shaft along the circumference by using adjusting screws, and fixing the gaps with the bulkhead by using bolts. And sleeving all parts of the sealing device in sequence. If the clearance between the blade tips and the pump shell is found to have larger clearance variation after water is discharged, the position of the middle bearing of the pump shaft is adjusted, and the pump shaft sealing device is readjusted. According to the epoxy pouring process, the middle filling piece is poured, the bolt is screwed after pouring, the screwing torque is 51 N.m (the head of the bolt is sleeved with an insulating protective sleeve, and the bolt and the nut are coated with a release agent). And (3) transporting the pump shaft, and checking the maximum offset of the pump shaft at the shaft seal position to be less than or equal to 0.3mm.
After the water jet propulsion device is installed, the pump shaft is installed, the middle bearing, the compartment seal, the tooth-shaped coupling, the adjusting short shaft and the main unit are arranged in place according to the water jet propulsion device, the middle bearing and the main unit are fixed on the base by adjusting screws, and the front end of the pump shaft is connected with the tooth-shaped coupling to form a whole; the rear flange of the main unit gear box is connected with the adjusting short shaft to form a whole; and after the water spray pump discharges water, retesting the gap of the impeller in the pump body, and if the gap meets the requirements, centering the shafting forward according to the axis of the impeller shaft.
After the shafting is pulled, the sag correction value of each measurement point after the shafting is pulled is calculated according to the following formula:
wherein:
f x-the sagging amount of the steel wire at the L point is mm; lx is the horizontal distance mm from the measuring point to the point A; the distance between the reference points of the L-bow and stern brackets is mm; p-weight per unit length of steel wire g/mMusical instrument wire, 3.95 g/m); g, steel wire tension kg; 0.99-pulley friction coefficient.
Before the water spraying pump is hoisted, checking whether the water spraying pump is intact, whether an oil seal is damaged or not, and allowing hoisting after the oil seal is checked to be qualified; the lifting of the water spraying pump uses a special lifting frame and a soft rope, the lifting rope is fixed on a lifting ring specified by equipment, and a pump shell and accessory components cannot be damaged in the lifting process; the pump body and the pump shaft are assembled on the platform, and the front end of the pump shaft is placed on the pulley yoke during assembly, so that the pump shaft is not deformed and bent; when the water spray pump is transported and assembled by using the special hanging frame, the central line of the pump shaft of the water spray pump is kept horizontal and consistent with the central line of the shaft system, and the water spray pump is gradually translated to the boat body by using the special track trolley until the water spray pump is fixed with the stern seal plate.
As shown in fig. 6-9, the shafting underwater centering embodiment is illustrated as follows:
(1) Preparation: the installation of the water jet propulsion device is completed, the installation of the pump shaft is completed, the length of the shafting is confirmed, and the machining of the two adjusting short shafts is completed. The middle bearing, the compartment seal, the tooth-shaped coupling, the adjusting short shaft and the main unit are arranged in place according to the requirements of the water jet propulsion device and the shafting layout. The intermediate bearing and the main unit are fixed on the base by adjusting screws. The front end of the pump shaft is connected with a tooth-shaped coupling to form a whole; the rear flange of the main unit gear box is connected with an adjusting short shaft to form a whole. And after the water is discharged, retesting the gap of the impeller in the pump body, and if the gap meets the requirement, centering the shafting forward according to the axis of the impeller shaft.
(2) Environmental conditions: in order to avoid large temperature difference deformation of the boat body during centering, the work should be carried out under the conditions of no large temperature change and no sunlight exposure of the boat body. In summer, it is preferable to select cloudy days, rainy days or early and late times. In order to prevent deformation caused by the boat body resting at the river bottom, enough water level should be needed in centering to enable the boat to be in a floating state.
(3) Centering tool: the following tools should be prepared: jack with pressure gauge, dial gauge and feeler gauge. The lifting load during centering can be obtained by using the oil pump pressure multiplied by the oil cylinder piston area. When the hull is deformed and the lifting load is suspected, the deformation sheet can be used for rechecking.
(4) Centering: the main unit is arranged on the adjusting screw and the intermediate bearing device is adjusted into position according to the drawing (shafting centering opening). Note that: it is recommended that the main unit axis should be 0.4mm below the datum line. And adjusting the main unit according to the opening recommended value in the size of the centering opening, and measuring the relative size, position and measurement tolerance between the front end of the pendulum-to-pump shaft (with the toothed coupling) and the rear end of the main unit gearbox (with the adjusting short shaft). After the adjustment is completed, all shafting is connected, and the main unit is fixed. The lifting load is checked with a jack, and the upper half of the intermediate bearing shell should be released when the lifting load is checked.
And recording the load born by the jack during lifting and descending, and finally determining the load value at the specified lifting height according to the data by a graph. When the jack is used for lifting, a load value is recorded every 0.01-0.05mm, until the load value reaches the point C in the figure, then the jack is gradually lowered, a load value is recorded every 0.01-0.05mm, finally, according to the load values of two points, A, B points are determined according to the figures 1-5, and the average load value= (A+B)/2 can be finally obtained, namely the load value when the lifting height is regulated.
And determining the load value at the time of the specified lifting height according to a specified method, checking whether the value meets the requirement or not with the following table, wherein the allowable error is 20%, and if not, reasonably correcting again.
Positioning and mounting of shafting and shafting components: the shaft grounding and speed measuring device is arranged at the position near the ribs of the pump shaft FR54, and the pump shaft is only contacted by the brush spring and does not bear the weight of the grounding device during installation. And a compartment sealing device on the pump shaft sleeve. And after the tooth-shaped coupler is arranged at the front end of the pump shaft, measuring a shafting length sample rod. And turning and adjusting the short shaft according to the length of the sample rod. The front end of the tooth-shaped coupler is provided with a turned adjusting short shaft. The installation of the compartment seal will fit over the compartment seal of the pump shaft and move to the FR52 compartment wall. The inner hole of the partition wall bracket is pre-opened to phi 234mm, and the length of the bracket sleeve is reserved to 15 mm. Mounting screw holes are cut in the support panel, and phi 13 is drilled. And is temporarily fixed with the sealing device by bolts. A sealing gasket is added between the contact surface of the sealing device and the bracket. The high polymer material is allowed to be filled between the contact surface of the sealing device and the bracket, so that the sealing device is vertical to the intermediate shaft, and the gaps around the sealing device are uniform. And (5) adjusting the position of the middle bearing and processing the movable cushion block. The installation of the compartment sealing device is carried out after the boat is launched and after the shaft system centering work is completed, and at the moment, the shaft system is rotated, symmetrical and uniform double-sided welding support sleeves are sleeved on the compartment wall, so that the gaps between the inner hole of the sealing device and the four sides of the intermediate shaft are uniform. The sealing device is disassembled, positioning pins (90 degrees, phi 8, two) are assembled, and the nut is screwed by using a rated torque (51 N.m) for a bolt sleeved with an insulating sleeve.
And (3) installing a main machine gearbox: and after the shafting alignment is finished, bearing load jacking data meet the requirements and the verification is finished, the installation construction of the host machine and the gearbox is carried out.
While the application has been described above with reference to the accompanying drawings, it will be apparent that the specific implementation of the application is not limited by the foregoing, but rather is within the scope of the application as long as various modifications are made by the method concept and technical scheme of the application, or the concept and technical scheme of the application are directly applied to other occasions without modification.
Claims (10)
1. The installation method of the marine water jet propulsion device is characterized by comprising the following steps of: the installation method of the ship water jet propulsion device comprises the following installation steps:
s1, when a water spray pump of a ship water spray propulsion device is installed, a pump shaft is hung on a boring frame platform by a hanging frame and is installed on a pump body, and the front end of the pump shaft is wrapped by canvas so as to avoid damage during hanging; the water spraying pump is hung on a handcart by a water spraying pump hanging bracket, the center position of the pump shaft is adjusted to coincide with the center of the shaft system boring hole, the water spraying pump and the pump shaft horizontally and stably move to the bow, and when the water spraying pump and the pump shaft move to a component flange, the pump shaft is penetrated into the pump shaft tube at the moment, and the pump shaft tube are not in intense collision; when the pump shaft extends out of the pump shaft tube, the pump shaft is placed on the rolling bearing to slide in parallel until the pump shaft is placed on the middle bearing;
s2, when the stern seal plate and the guide vane body flange are mounted, the terrace die is evenly formed on the joint surface of the reinforcing ring of the stern seal plate and the guide vane body flange, and the thickness is less than or equal to 0.5mm. The component flange is connected with the tail sealing plate by bolts, and the bolts are symmetrically and uniformly screwed; adjusting the position of the intermediate bearing, and checking that the gap between the inner surface of the pump shell and the blade tip is 0.7-0.9 mm;
s3, mounting a pump shaft sealing device: the pump shaft sealing device connecting flange is sleeved on the pump shaft, the gap between the inner hole of the flange and the pump shaft is uniformly distributed along the circumference by using an adjusting screw, and the gap is fixed with the bulkhead by using a bolt, and all parts of the sealing device are sleeved in sequence; re-measuring the gap between the blade tip and the pump shell after water is discharged, if the gap variation is found to be larger, adjusting the position of the middle bearing of the pump shaft, and readjusting the pump shaft sealing device;
s4, pouring the middle filling piece according to an epoxy pouring process, tightening a bolt after pouring, transferring the pump shaft, and checking that the maximum offset of the pump shaft is less than or equal to 0.3mm at a shaft seal position.
2. The marine water jet propulsion apparatus installation method of claim 1, wherein: the method for installing the ship water jet propulsion device comprises the following steps in sequence: the method comprises the steps of shafting stay wire, impeller shaft protecting pipe installation, shafting light, boring a flange plane of a stern seal plate, an inner hole and an inner end face of a runner, water spraying pump installation, pump shaft watertight compartment device installation, middle bearing, compartment sealing, tooth-shaped coupling and compensation short shaft installation, shafting centering according to shafting centering process requirements after water spraying pump drainage, installation of a fixed shafting part, positioning and installation of a main engine gearbox, and installation of a water spraying propulsion device.
3. The marine water jet propulsion apparatus installation method according to claim 1 or 2, wherein: when the shafting is pulled, the purpose is to locate the intersection of the pump shaft center line and the flow channel center line and check the position of the engine base panel of the main engine gearbox; the center of the stay wire is intersected with the center of the runner; the deviation between the center line of the shafting and the center line of the ship is not more than +/-3 mm.
4. The marine water jet propulsion apparatus installation method of claim 2, wherein: when the impeller shaft protection tube is installed, the impeller shaft protection tube penetrates into the pump shaft tube, the length of the impeller shaft protection tube is larger than 200mm, the sacrificial anode seat is burned on the pump shaft tube in advance, the perforated part of the pump shaft tube in the flow passage is welded, the seal is required by welding, and then the length of the redundant tail tube is cut off.
5. The marine water jet propulsion apparatus installation method of claim 2, wherein: when the shaft system is in illumination, on the basis of centering through the shaft system stay wire, the central line of the shaft system is determined by adopting the illumination energy standard of the projector; and positioning the middle bearing, and positioning and fixing the correct position according to the shaft system centering. A movable cross light finding target is arranged on a stern sealing plate and a bulkhead, a light instrument is arranged behind a stern pull frame, a machining circle and an inspection circle are drawn on a matched part after light is given, and a circle punching hole is formed.
6. The marine water jet propulsion apparatus installation method of claim 2, wherein: when boring the flange plane of the stern seal plate and the inner end surface of the central hole and the runner, firstly, boring the flange central hole of the stern seal plate according to the optical center bore; scraping a flange plane of the stern sealing plate, wherein the thickness of the scraped stern sealing plate is not smaller than 10mm, and the verticality of the flange plane of the stern sealing plate to the center is less than or equal to 0.25mm; boring the inner end surface of the runner, wherein the perpendicularity of the plane of the inner end surface of the runner to the center of the axis is less than or equal to 0.3mm, and ensuring that a gap of 1.0-2.5 mm is reserved on the plane of the impeller when the impeller shell is assembled; dismantling the bore row; and fixing a drill jig on the tail sealing plate according to the center of the screw hole of the flange of the tail sealing plate and drilling.
7. The marine water jet propulsion apparatus installation method according to claim 1 or 2, wherein: the hydraulic system of the water spray pump adopts antiwear hydraulic oil.
8. The marine water jet propulsion apparatus installation method according to claim 1 or 2, wherein: after the water jet propulsion device is installed, the pump shaft is installed, the middle bearing, the compartment seal, the tooth-shaped coupling, the adjusting short shaft and the main unit are arranged in place according to the water jet propulsion device, the middle bearing and the main unit are fixed on the base by adjusting screws, and the front end of the pump shaft is connected with the tooth-shaped coupling to form a whole; the rear flange of the main unit gear box is connected with the adjusting short shaft to form a whole; and after the water spray pump discharges water, retesting the gap of the impeller in the pump body, and if the gap meets the requirements, centering the shafting forward according to the axis of the impeller shaft.
9. The marine water jet propulsion apparatus installation method of claim 2, wherein: after the shafting is pulled, the sag correction value of each measurement point after the shafting is pulled is calculated according to the following formula:
wherein:
f x-the sagging amount of the steel wire at the L point is mm; lx is the horizontal distance mm from the measuring point to the point A; the distance between the reference points of the L-bow and stern brackets is mm; p-weight per unit length of steel wire g/mMusical instrument wire, 3.95 g/m); g, steel wire tension kg; coefficient of friction of 0.99-pulley。
10. The marine water jet propulsion apparatus installation method according to claim 1 or 2, wherein: before the water spraying pump is hoisted, checking whether the water spraying pump is intact, whether an oil seal is damaged or not, and allowing hoisting after the oil seal is checked to be qualified; the lifting of the water spraying pump uses a special lifting frame and a soft rope, the lifting rope is fixed on a lifting ring specified by equipment, and a pump shell and accessory components cannot be damaged in the lifting process; the pump body and the pump shaft are assembled on the platform, and the front end of the pump shaft is placed on the pulley yoke during assembly, so that the pump shaft is not deformed and bent; when the water spray pump is transported and assembled by using the special hanging frame, the central line of the pump shaft of the water spray pump is kept horizontal and consistent with the central line of the shaft system, and the water spray pump is gradually translated to the boat body by using the special track trolley until the water spray pump is fixed with the stern seal plate.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310792505.5A CN116639228A (en) | 2023-06-30 | 2023-06-30 | Installation method of ship water jet propulsion device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310792505.5A CN116639228A (en) | 2023-06-30 | 2023-06-30 | Installation method of ship water jet propulsion device |
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| CN202310792505.5A Pending CN116639228A (en) | 2023-06-30 | 2023-06-30 | Installation method of ship water jet propulsion device |
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