A densometer

Abstract

The application discloses a sealing test equipment applied to a pitch control propeller, which comprises a fixing assembly, a sealing assembly and a plug, wherein the fixing assembly is used for being connected with the pitch control propeller shaft to be sealed and tested; the sealing assembly is sleeved outside the oil pipe, the first end of the sealing assembly is connected with the fixing assembly, and the second end of the sealing assembly is provided with a first through hole matched with the oil injection opening; and the plug is arranged in the first through hole in an openable and closable mode. The sealing test equipment provided by the application solves the technical problems of inconvenient sealing test operation and difficult observation in the prior art, and can simultaneously complete the sealing test of the inner oil pipes of each shaft section of the pitch control propeller shaft system in the field in advance.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of shipbuilding, and particularly relates to a tightness test equipment. BACKGROUND

[0002] The adjustable pitch propeller is short for the pitch propeller, which can adjust the pitch of the propeller blade to change the ship speed, realize the forward and reverse of the ship, and match different rotating speeds, so that the ship can achieve good fuel efficiency and operability under various working conditions. The pitch propeller mainly comprises a propeller blade, a propeller hub and a propeller shaft. The propeller blade is fixedly installed on a crank disc installed on the propeller hub. A variable pitch cylinder is arranged in the propeller hub. When the ship is forward or reverse, hydraulic oil enters the reverse oil cavity or the forward oil cavity of the variable pitch cylinder, respectively, to push the variable pitch piston in the variable pitch cylinder to move, thereby driving the crank disc and the propeller blade to act, changing the pitch of the propeller blade, and realizing the control operation of the forward and reverse change of the pitch propeller blade, so as to change the ship speed.

[0003] The pitch propeller blade, the propeller hub and part of the propeller shaft are installed outside the cabin of the ship, which is an underwater equipment working in water all the time. Once a failure occurs, the cost of maintenance is extremely high. Therefore, the oil pipe in the shaft system needs to be tested for tightness before use, so as to check whether the performance indexes of the pitch propeller, the propeller hub and the propeller shaft system meet the design requirements and the use requirements.

[0004] In the prior art, the tightness test of the pitch propeller shaft inner pipe section is carried out after the entire shaft system is assembled (without connecting the gear box output end or the thrust bearing output end), and the end face of the shaft connected to the gear box output end or the thrust bearing output end is blocked by a blind flange equipment, and then the oil tightness test is carried out through the oil pipe oil inlet. This operation is not convenient in the narrow engine room, and it is not easy to observe. A large amount of manpower, material resources and time are wasted in the assembly process of the entire shaft system. SUMMARY

[0005] The purpose of the present application is to provide a tightness test equipment, which solves the technical problems of inconvenient operation and difficult observation in the prior art, and can simultaneously complete the tightness test of the inner oil pipe of each shaft section of the pitch propeller shaft system in the inner field in advance.

[0006] The present application provides a tightness test equipment applied to a pitch propeller, wherein the pitch propeller comprises a propeller blade, a propeller hub and a pitch propeller shaft, the propeller blade is fixedly installed on a crank disc of the propeller hub, a variable pitch cylinder is arranged in the propeller hub, two adjacent pitch propeller shafts are connected through a shaft coupling, an oil pipe is arranged in the pitch propeller shaft, one end of the oil pipe is connected with the variable pitch cylinder, and the other end is an oil inlet, the tightness test equipment is sealingly connected with the end part of the pitch propeller shaft, and is used for testing the tightness of the oil pipe in the pitch propeller shaft, characterized in that the tightness test equipment comprises:

[0007] A fixing assembly is used for connecting with the pitch propeller shaft to be sealed and tested.

[0008] a sealing assembly, the sealing assembly being sleeved outside the oil pipe, a first end of the sealing assembly being connected with the fixing assembly, and a second end of the sealing assembly being provided with a first through hole matched with the oil injection port; and

[0009] a plug, the plug being arranged in the first through hole in an openable and closable manner.

[0010] Further, the sealing assembly comprises:

[0011] a cover plate short pipe, the cover plate short pipe being sleeved outside the oil pipe, a first end of the cover plate short pipe being connected with the fixing assembly;

[0012] a cover plate end cover, the cover plate end cover being connected with a second end of the cover plate short pipe, a middle portion of the cover plate end cover being provided with a second through hole matched with the oil injection port;

[0013] a planar welding seat, the planar welding seat being connected with the cover plate end cover, the first through hole being arranged in a middle portion of the planar welding seat and being in communication with the second through hole.

[0014] Further, the sealing assembly further comprises a cover plate flange, the cover plate flange being connected with an end portion of the propeller shaft to be sealed and tested.

[0015] Further, the fixing assembly comprises:

[0016] a snap ring, the snap ring being sleeved at a coupling surface of the propeller shaft and the coupling;

[0017] a snap ring flange, the snap ring flange being connected with the snap ring as a whole;

[0018] a buffer, the buffer being clamped between the snap ring and the propeller shaft.

[0019] Further, the snap ring comprises at least two snap ring portions, the snap ring portions being butted to form the annular snap ring;

[0020] the snap ring flange comprises at least two snap ring flange portions, two ends of the snap ring flange portions being provided with snap ring connecting portions for connecting with adjacent snap ring flange portions;

[0021] the opposite snap ring connecting portions being connected through bolts and nuts.

[0022] Further, the sealing test device further comprises:

[0023] a connecting rod assembly, the connecting rod assembly comprising at least two connecting rods, the first end of the sealing assembly being connected with the fixing assembly through the connecting rod assembly.

[0024] Further, the connecting rod is connected with the snap ring flange through a nut, and the connecting rod is connected with the cover flange through a nut.

[0025] Further, the sealing test equipment further comprises:

[0026] A first sealing ring, the end surface of the cover flange connected with the end of the propeller shaft is provided with a sealing ring clamping groove, and the first sealing ring is clamped in the sealing ring clamping groove.

[0027] Further, the fixing assembly is a metal hose, a first end of the metal hose is sleeved on the end of the propeller shaft to be sealed and tested, and connected with the propeller shaft through a buckle, and a second end of the metal hose is sleeved on a first end of the cover short pipe and connected with the cover short pipe through a buckle.

[0028] Further, the end of the propeller shaft to be sealed and tested is sleeved with a second sealing ring, and the first end of the cover short pipe is sleeved with a third sealing ring.

[0029] The sealing test equipment provided by the application has more flexibility, operability, safety and diversity, improves work efficiency, saves manpower, material resources, financial resources and time cost, and can save construction period for the entire ship construction. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 A structural schematic view of the sealing test equipment provided by the embodiment of the application is shown in the figure;

[0031] Figure 2 A structural schematic view of the sealing test equipment provided by the embodiment of the application is shown in the figure; Figure 1 A structural schematic view of the sealing assembly of the sealing test equipment is shown in the figure;

[0032] Figure 3 A structural schematic view of the sealing test equipment provided by the embodiment of the application is shown in the figure; Figure 1 A structural schematic view of the fixing assembly of the sealing test equipment is shown in the figure;

[0033] Reference signs:

[0034] 1 - plug; 2 - cover short pipe; 3 - cover end cover; 4 - flat welding seat; 5 - cover flange; 6 - snap ring;

[0035] 7 - snap ring flange; 8 - buffer; 9 - snap ring connecting part; 10 - connecting rod; 11 - propeller shaft and shaft coupling matching surface; 12 - bolt; 13 - flat washer; 14 - spring washer; 15 - nut; 16 - first sealing ring; 17 - propeller shaft. DETAILED DESCRIPTION

[0036] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0037] In addition, the reference numbers and / or reference letters can be repeated in different examples in the present application, and such repetition is for the purpose of simplification and clarity, and does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but a person of ordinary skill in the art can realize the application of other processes and / or the use of other materials.

[0038] In order to overcome the shortcomings of the existing tightness test equipment, the present application designs a new type of tightness test equipment for the pitch propeller shaft, which can simultaneously complete the tightness test of the inner oil pipe of each shaft section of the pitch propeller shaft in the field in advance, which can greatly save the time of the pitch propeller shaft in the entire assembly process, and save manpower and material resources.

[0039] Embodiment one

[0040] As shown in the drawings, Figures 1-3 The present application provides a tightness test equipment for a pitch propeller, the pitch propeller comprising a blade, a hub and a pitch propeller shaft, the blade being fixedly installed on a crank disc of the hub, a variable pitch oil cylinder being arranged in the hub, two adjacent pitch propeller shafts being connected through a shaft coupling, an oil pipe being arranged in the pitch propeller shaft, one end of the oil pipe being connected with the variable pitch oil cylinder, and the other end being an oil injection port, the tightness test equipment being sealingly connected with an end portion of the pitch propeller shaft for testing the tightness of the oil pipe in the pitch propeller shaft, characterized in that the tightness test equipment comprises a fixing assembly, a sealing assembly and a plug, the fixing assembly being used for connecting with the pitch propeller shaft to be tested, the sealing assembly being sleeved outside the oil pipe, a first through hole being arranged in the sealing assembly in a position opposite to the oil injection port, and the plug being openably and closably arranged in the first through hole.

[0041] In some embodiments, as shown in Figure 1 and Figure 2 The sealing assembly comprises a cover plate short pipe 2, a cover plate end cover 3 and a planar welding seat 4, the cover plate short pipe being sleeved outside the oil pipe, a first end of the cover plate short pipe being connected with the fixing assembly, the cover plate end cover being connected with a second end of the cover plate short pipe, a second through hole being arranged in the middle of the cover plate end cover in a position opposite to the oil injection port, the planar welding seat being connected with the cover plate end cover, the first through hole being arranged in the middle of the planar welding seat and being in communication with the second through hole.

[0042] In some embodiments, as shown in Figure 1 and Figure 2 The sealing assembly further comprises a cover flange 5 connected with the end of the controllable pitch propeller shaft to be sealed and tested. The cover flange and the cover end cap are made of sheet material, welded with the cover short tube, and then the weld is polished and the surface is polished. The cover short tube is made of steel pipe, and the flat welding seat is made of bar material, welded with the cover end cap, and then the weld is polished and the surface is polished.

[0043] In some embodiments, as shown in Figure 1 and Figure 3 The fixing assembly comprises a snap ring 6, a snap ring flange 7, and a buffer 8. The snap ring is sleeved at the controllable pitch propeller shaft and the coupling mating surface 11. The snap ring flange is connected with the snap ring as a whole. The buffer is sleeved between the snap ring and the controllable pitch propeller shaft. The buffer is an elastic member, which can be rubber, silicone, etc., and is not specifically limited here. The snap ring flange and the snap ring connecting plate are made of sheet material, and the snap ring is made of pipe material and is welded with the snap ring flange and the snap ring connecting plate. After welding, the weld is polished and the surface is polished.

[0044] Specifically, as shown in Figure 3 The snap ring comprises at least two snap ring parts, and the snap ring parts are connected to form a ring-shaped snap ring. The snap ring flange comprises at least two snap ring flange parts, and the two ends of the snap ring flange part are provided with a snap ring connecting part 9 for connecting with the adjacent snap ring flange part. The opposite snap ring connecting parts 9 are sequentially connected by a bolt 12, a flat washer 13, a spring washer 14, and a nut 15.

[0045] In some embodiments, as shown in Figure 1 The sealing test device further comprises a connecting assembly, and the connecting assembly comprises at least two connecting rods 10. The first end of the sealing assembly is connected with the fixing assembly through the connecting assembly.

[0046] Specifically, the snap ring flange and the cover flange are connected by the connecting rod. The connecting rod and the snap ring flange are sequentially connected by a flat washer, a spring washer, and a nut. The connecting rod and the cover flange are sequentially connected by a flat washer, a spring washer, and a nut. In order to improve the stability of the equipment installation, six connecting rods are used in the embodiments of the present application.

[0047] In some embodiments, as shown in Figure 1As shown, the sealing test device further comprises a first sealing ring 16, and an end surface of the cover flange connected with the end of the adjustable pitch propeller shaft 17 is provided with a sealing ring clamping groove, and the first sealing ring is clamped in the sealing ring clamping groove. The sealing ring is clamped in the cover flange sealing ring clamping groove, which can effectively seal the shaft end surface and prevent the sealing test liquid from leaking during the sealing test.

[0048] When the sealing test device of the adjustable pitch propeller shaft provided in the embodiments of the present application performs the sealing test, the oil pipes in each shaft section can be tested in advance in the field. The specific method is as follows: first, fix the shaft section to be tested by other assembly devices, then fix the snap ring (which has been assembled with the snap ring flange and the snap ring connecting plate) and the rubber through bolts, nuts, spring washers and flat washers at the shaft and the joint surface, and assemble the rubber between the shaft and the snap ring to prevent the shaft surface from being damaged during the test. After the snap ring assembly is fixed, connect the cover flange assembly and other assemblies such as Figure 1 the cover flange assembly is fixed on the end surface of the shaft section.

[0049] After the above adjustable pitch propeller shaft sealing test device is assembled, fill the oil pipes in the shaft with sealing test liquid according to the sealing test requirements through the oil inlet on the oil pipe, seal the oil inlet, screw the plug into the flat welding seat on the cover assembly, tighten the plug, and perform pressure maintenance. After the sealing test requirements are met, disassemble the adjustable pitch propeller shaft sealing test device to perform the sealing test on the next shaft section. Multiple devices can be made to simultaneously perform the sealing test on the shaft sections to be tested, which can greatly save manpower, material resources, financial resources and time, and save the construction period of the entire ship construction.

[0050] In some embodiments, the fixing assembly is a metal hose, a first end of the metal hose is sleeved on an end of the adjustable pitch propeller shaft to be sealed and tested and connected with the adjustable pitch propeller shaft through a buckle, and a second end of the metal hose is sleeved on a first end of the cover short pipe and connected with the cover short pipe through a buckle. A second sealing ring is sleeved on the end of the adjustable pitch propeller shaft to be sealed and tested, and a third sealing ring is sleeved on the first end of the cover short pipe.

[0051] When the sealing test device of the adjustable pitch propeller shaft provided in the embodiments of the present application performs the sealing test, first, sleeve the second sealing ring on the end of the shaft section to be tested, and sleeve the third sealing ring on the first end of the cover short pipe, then sleeve the first end of the metal hose on the end of the shaft section to be tested and connect it through a buckle, and sleeve the second end of the metal hose on the first end of the cover short pipe on which the cover end cover and the flat welding seat have been installed.

[0052] After the shaft seal test equipment of the adjustable pitch propeller is assembled, the oil pipe is filled with the sealing test liquid through the oil injection port, the oil injection port on the shaft is sealed, the plug is screwed into the flat welding seat of the cover plate assembly, the plug is tightened, pressure is maintained, and after the sealing test requirement is reached, the adjustable pitch propeller shaft sealing test equipment is removed, the sealing test of the next shaft section is carried out, and multiple devices can be made to simultaneously carry out the sealing test of the shaft sections, which can greatly save manpower, material resources, financial resources and time, and save the construction period of the entire ship.

[0053] The one or more technical solutions provided in the embodiments of the application have at least the following technical effects or advantages:

[0054] 1. The WS18 product applies the sealing test equipment of the adjustable pitch propeller shaft provided in the embodiments of the application, the sealing test of the inner oil pipe of each shaft section of the adjustable pitch propeller shaft system is simultaneously completed in the field, the time of the adjustable pitch propeller shaft in the entire assembly process is greatly saved, and manpower and material resources are saved.

[0055] 2. Since the plug is arranged in the first through hole in an openable and closable manner, when the plug is opened, the inner oil pipe of the shaft is filled with the sealing test liquid, and the oil injection port is sealed, and when the plug is tightened, the sealing test can be started, and the operation is simple.

[0056] 3. Since the clasp flange and the connecting rod type structure design are adopted, when the connecting rod is loosened, the structure device is convenient to disassemble and assemble, is flexible, and is simple to operate.

[0057] 4. Since the internal oil pipe structure of the adjustable pitch propeller is complex and the sealing requirement is high, the device adopts a detachable connection design, on the one hand, the sealing test of a single shaft section can be carried out in advance in the field, and the operability and safety are improved, and on the other hand, the sealing test of the entire shaft section can be carried out in the underwater stage after the assembly of each shaft section is completed.

[0058] In the present application, unless specifically defined and limited otherwise, "on" or "under" of a first feature to a second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, "on", "above" and "above" of the first feature to the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" of the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0059] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" indicate the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0060] It should be noted that all directional indications in the embodiments of the present application are only used to explain the relative position relationship, movement condition and the like between the components in a certain posture, and if the certain posture changes, the directional indications also change accordingly.

[0061] In the present application, unless otherwise explicitly specified and limited, the terms "connection", "fixation" and the like should be understood broadly, for example, "fixation" can be connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be direct connection, or indirect connection through an intermediate medium; can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0062] In addition, the description such as "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implying the number of the indicated technical features. Therefore, the features limited by "first", "second" can include one or more of the features explicitly or implicitly. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise explicitly specified and limited.

[0063] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in the present specification.

[0064] In addition, the technical solutions among various embodiments can be combined with each other, but it must be based on that a person skilled in the art can realize, when the combination of technical solutions appears contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the present application.

[0065] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and purposes of the present application, the scope of the present application is defined by the claims and their equivalents.

Claims

1. A tightness test device, applied to a controllable pitch propeller, the controllable pitch propeller comprising a blade, a hub and a controllable pitch propeller shaft, the blade being fixedly mounted on a crank disk of the hub, a pitch cylinder being provided in the hub, two adjacent sections of the controllable pitch propeller shaft being connected via a coupling, an oil pipe being provided in the controllable pitch propeller shaft, one end of the oil pipe being connected to the pitch cylinder and the other end being an oil filling port, the tightness test device being sealingly connected to the end of the controllable pitch propeller shaft and being used to test the tightness of the oil pipe in the controllable pitch propeller shaft, characterized in that: include: a fixing assembly, the fixing assembly being used to connect to the controllable pitch propeller shaft to be tested for sealing; a sealing assembly, wherein the sealing assembly is sleeved on the outside of the oil pipe, a first end of the sealing assembly is connected to the fixing assembly, and a second end of the sealing assembly is provided with a first through hole aligned with the oil filling port; as well as, a cock, the cock being openably and closably disposed in the first through hole; The sealing assembly comprises: a short cover plate tube, the short cover plate tube being sleeved on the outside of the oil pipe, and a first end of the short cover plate tube being connected to the fixing assembly; a cover plate end cover, the cover plate end cover being connected to the second end of the cover plate short tube, and a second through hole being provided in the middle of the cover plate end cover and aligned with the oil filling port; A planar welding seat is connected to the cover plate end cover, and the first through hole is opened in the middle of the planar welding seat and is connected to the second through hole.

2. The sealing test equipment according to claim 1, characterized in that: The sealing assembly further includes a cover plate flange connected to the end of the controllable pitch propeller shaft to be tested for sealing.

3. The sealing test equipment according to claim 2, characterized in that: The fixing assembly includes: a snap ring, the snap ring being sleeved on the mating surface between the controllable pitch propeller shaft and the coupling; A clamping ring flange, wherein the clamping ring flange is integrally connected to the clamping ring; A buffer component is clamped between the clamping ring and the controllable pitch propeller shaft.

4. The sealing test equipment according to claim 3, characterized in that: The snap ring comprises at least two snap ring parts, and the snap ring parts are connected to form the annular snap ring; The clamping flange includes at least two clamping flange parts, and both ends of the clamping flange part are provided with a clamping connection part for connecting with the adjacent clamping flange part; The opposite clamping ring connection parts are connected by bolts and nuts.

5. The sealing test equipment according to claim 3 or 4, characterized in that: The close test equipment also includes: A connecting rod assembly includes at least two connecting rods, and the first end of the sealing assembly is connected to the fixing assembly through the connecting rod assembly.

6. The sealing test equipment according to claim 5, characterized in that: The connecting rod is connected to the clamping ring flange through a nut, and the connecting rod is connected to the cover plate flange through a nut.

7. The sealing test equipment according to claim 6, characterized in that: The close test equipment also includes: A first sealing ring is provided on the end surface where the cover flange is connected to the end of the controllable pitch propeller shaft. The first sealing ring is clamped in the sealing ring groove.

8. The sealing test equipment according to claim 1, characterized in that: The fixing assembly is a metal hose, a first end of which is sleeved on the end of the controllable pitch propeller shaft to be sealed and connected to the controllable pitch propeller shaft through a buckle, and a second end of the metal hose is sleeved on the first end of the cover plate short tube and connected to the cover plate short tube through a buckle.

9. The sealing test equipment according to claim 8, characterized in that: The end of the controllable pitch propeller shaft to be tested for sealing is sleeved with a second sealing ring, and the first end of the cover plate short tube is sleeved with a third sealing ring.

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