CN217276675U - Static balance test device for heavy propeller of ship - Google Patents
Static balance test device for heavy propeller of ship Download PDFInfo
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- CN217276675U CN217276675U CN202220687312.4U CN202220687312U CN217276675U CN 217276675 U CN217276675 U CN 217276675U CN 202220687312 U CN202220687312 U CN 202220687312U CN 217276675 U CN217276675 U CN 217276675U
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- propeller
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- sleeve
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- 230000003068 static effect Effects 0.000 title claims abstract description 55
- 238000005096 rolling process Methods 0.000 claims abstract description 5
- 230000000712 assembly Effects 0.000 claims description 6
- 238000000429 assembly Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000036961 partial effect Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000002829 reductive effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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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
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- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
The utility model discloses a static balance test device for a heavy ship propeller, which comprises a static balance shaft, a roller set, a first positioning part, a second positioning part and a base component, wherein the static balance shaft is provided with positioning rings and external thread parts at intervals; the number of the roller groups is two; the first positioning part is used for positioning the first end of the heavy-duty propeller; the second end of the second positioning part is provided with an internal threaded part which is used for positioning the second end of the heavy-duty propeller; the base component comprises a concrete pit and two brackets which are oppositely arranged on two sides of the concrete pit; the two roller groups are respectively arranged at the upper ends of the two supports, the two ends of the static balance shaft are respectively in rolling contact with the two roller groups, the two ends of the first positioning part are respectively abutted to the positioning ring and the first end of the propeller after the first positioning part is sleeved on the static balance shaft, the second end of the second positioning part is in threaded connection with the static balance shaft, and the first end of the second positioning part is abutted to the second end of the propeller. The static balancing device of the heavy propeller is convenient to install and stable to use.
Description
Technical Field
The utility model belongs to the technical field of boats and ships, specifically speaking relates to a heavy screw static balance test device of boats and ships.
Background
The ship propeller is a device which rotates in water by means of blades and converts the rotating power of an engine into propelling force, and can be a propeller with two or more blades connected with a hub, wherein the backward surface of each blade is a helicoid or a propeller similar to the helicoid. With the development and progress of society, the size of ships is larger and larger, and the specification of the used propelling devices is increased. The unbalance of the ship propeller can have adverse effects on the strength of the ship propeller and the bending strength of a stern shaft, cause accelerated wear of a bearing, vibration of a shaft system and a ship body, influence the operation of a main engine and the like, and therefore the ship propeller needs to be subjected to a static balance test after being manufactured or repaired.
The weight of the ship heavy propeller can reach several tons or more than ten tons, and meanwhile, the diameter of the ship heavy propeller can reach several meters or more than ten meters. The static balance test device for the propeller of the common ship cannot meet the requirements of the static balance test of the heavy propeller from the aspects of size and load capacity.
Therefore, a static balance test device for a heavy-duty propeller of a ship is developed, which is a technical problem to be solved urgently.
Disclosure of Invention
To the problem pointed out in the background art, the utility model provides a heavy screw static balance test device of boats and ships can satisfy the experimental demand of heavy screw static balance to the equipment of being convenient for.
In order to realize the purpose of the utility model, the utility model adopts the following technical scheme to realize:
a static balance test device for a heavy ship propeller comprises a static balance shaft, a roller set, a first positioning part, a second positioning part and a base assembly, wherein the static balance shaft is provided with positioning rings and external thread parts at intervals; the number of the roller groups is two; the first positioning part is used for positioning the first end of the heavy-duty propeller; the second end of the second positioning part is provided with an internal threaded part which is used for positioning the second end of the heavy-duty propeller; the base assembly comprises a concrete pit and two brackets which are oppositely arranged on two sides of the concrete pit; the two roller groups are respectively arranged at the upper ends of the two supports, two ends of the static balance shaft are respectively in rolling contact with the two roller groups, two ends of the first positioning part are respectively abutted to the positioning ring and the first end of the propeller after the static balance shaft is sleeved on the first positioning part, the second end of the second positioning part is in threaded connection with the static balance shaft, and the first end of the second positioning part is abutted to the second end of the propeller.
In some embodiments of the present application, the first positioning portion includes a first tapered sleeve and a first adjusting sleeve, one end of the first adjusting sleeve abuts against the positioning ring, the other end of the first adjusting sleeve abuts against a first end of the first tapered sleeve, and a second end of the first tapered sleeve abuts against a first end of the heavy duty propeller.
In some embodiments of the present application, a cross-sectional area of a first end of the first tapered sleeve is greater than a cross-sectional area of a second end of the first tapered sleeve, the second end of the first tapered sleeve extending into a first end of the through-hole of the heavy duty propeller.
In some embodiments of the present application, the second positioning portion includes a second tapered sleeve, a second adjusting sleeve, and a locking nut, a first end of the second tapered sleeve abuts against a second end of the propeller, a second end of the second tapered sleeve abuts against one end of the second adjusting sleeve, the other end of the second adjusting sleeve abuts against the locking nut, and the locking nut is in threaded connection with the external threaded portion.
In some embodiments of the present application, a cross-sectional area of a first end of the second tapered sleeve is smaller than a cross-sectional area of a second end of the second tapered sleeve, the first end of the second tapered sleeve extending into the second end of the through-hole of the propeller.
In some embodiments of the present application, the roller set includes two bearing assemblies disposed symmetrically with respect to a radial direction of the static balance shaft, the bearing assemblies include a bearing housing, an adjusting pad, and two bearings disposed adjacently, the two bearings are rotatably connected in the bearing housing, and the adjusting pad is disposed between the bearings and the bearing housing.
In some embodiments of this application, the bearing frame includes the bottom plate, sets up relatively two connecting plates on the bottom plate and connects two connecting axle on the connecting plate, two the bearing suit is in on the connecting axle, two the bearing sets up two in the connecting plate.
In some embodiments of this application, two the connecting plate is defined as first connecting plate and second connecting plate respectively, first connecting hole has been seted up on the first connecting plate, the second connecting hole has been seted up on the second connecting plate, the first end of connecting axle certainly first connecting hole stretches out, the second end of connecting axle certainly second connecting hole stretches out, the first end of connecting axle is provided with the backstop ring, the backstop ring with first connecting plate offsets, the second end of connecting axle is seted up flutedly, and the jump ring card is gone into realize in the recess the connecting axle with the connection of second connecting plate.
In some embodiments of the present application, the first conical sleeve is provided with a plurality of first lifting holes, and the first adjusting sleeve is provided with a plurality of second lifting holes.
In some embodiments of the present application, the second conical sleeve is provided with a plurality of third lifting holes, and the second adjusting sleeve is provided with a plurality of fourth lifting holes.
Compared with the prior art, the utility model discloses an advantage is with positive effect:
the static balance shaft extends into a through hole of the heavy-duty propeller, positioning rings and external thread parts are arranged on the static balance shaft at intervals, in order to realize the positioning of two ends of the heavy-duty propeller, a first positioning part and a second positioning part are arranged, two ends of the first positioning part are respectively abutted against the positioning rings and the first end of the heavy-duty propeller, the second positioning part is in threaded connection with the static balance shaft, one end of the second positioning part is abutted against the second end of the heavy-duty propeller, so that the positioning of the heavy-duty propeller is realized, and only the second positioning part needs to be adjusted in the positioning process, so that the test device is convenient to assemble; in order to adapt to the heavy weight and the large diameter of the heavy-duty propeller, a concrete pit is arranged between the two heavy-duty propellers, and the concrete pit can be used for accommodating the heavy-duty propeller, so that the damage of the bracket caused by the overhigh height of the bracket and the unnecessary difficulty brought to the assembly of a test device are avoided; the upper ends of the two brackets are respectively provided with a roller group which is in rolling contact with the static balance shaft. The static balancing device of the heavy propeller can be conveniently installed and stably used.
Other features and advantages of the present invention will become more apparent from the following detailed description of the invention when read in conjunction with the accompanying drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive labor.
FIG. 1 is a schematic view of an embodiment of the present invention;
FIG. 2 is an enlarged view of a portion A of FIG. 1;
FIG. 3 is a partial enlarged view of the portion B in FIG. 1;
fig. 4 is a partial side view of an embodiment of the present invention;
reference numerals are as follows:
110, a bracket; 120, a concrete pit;
200, a static balance shaft; 210, a positioning ring; 220, an external threaded portion;
300, roller groups;
310, a bearing assembly;
311, a bearing seat; 3111, a first connection plate; 3112, a connecting shaft; 3113, a base plate; 3114, a second connecting plate; 3115, a stop ring; 3116, snap spring;
312, a conditioning pad; 313, a bearing;
410, a first positioning portion; 411, a first conical sleeve; 412, a first adjustment sleeve; 420, a second positioning portion; 421, a second conical sleeve; 4211, a third lifting hole; 422, a second adjusting sleeve; 4221, a fourth hoisting hole; 423, a locking nut; 4231, a fifth lifting hole;
500, heavy duty propeller.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, the meaning of "a plurality" is two or more unless otherwise specified.
In the description of the present application, it should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. "beneath," "under" and "beneath" a first feature includes the first feature being directly beneath and obliquely beneath the second feature, or simply indicating that the first feature is at a lesser elevation than the second feature.
The following disclosure provides many different embodiments or examples for implementing different features of the invention. In order to simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or reference letters in the various examples, which have been repeated for purposes of simplicity and clarity and do not in themselves dictate a relationship between the various embodiments and/or arrangements discussed. In addition, the present disclosure provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.
A through hole is formed at the middle position of the heavy propeller 500, and the static balance shaft 200 passes through the through hole. Because the diameter of the heavy propeller 500 is large, if two supports 110 with a high height arranged at intervals are used for supporting two ends of the static balance shaft 200, the height of the supports 110 needs to be designed to be high, and in order to prevent the supports 110 from deforming due to stress, the strength of the supports 110 needs to be high. In addition, because the heavy propeller 500 is heavy, the heavy propeller 500 needs to be moved in a hoisting mode when a static balance test is performed, the height of the bracket 110 is high, and in order to realize the installation of the heavy propeller 500, the hoisting height of the heavy propeller 500 is also high, so that the hoisting difficulty and the workload of hoisting operators are increased, and the test efficiency is reduced.
Therefore, as shown in fig. 1, the base assembly includes a concrete pit 120 in addition to two supports 110 spaced apart from each other, and the two supports 110 are respectively disposed at both sides of the concrete pit 120. The depth of the concrete pit 120 is adjusted according to the diameter of the heavy-duty propeller 500, thereby satisfying the demands of propellers of different diameters.
In order to improve the connection strength between the support 110 and the ground on both sides of the concrete pit 120, the bottom of the support 110 is connected with the ground on both sides of the concrete pit 120 by expansion bolts 121. Thereby ensuring a stable connection of the support 110 with both sides of the concrete pit 120.
In this embodiment, two roller sets 300 are further included, and the two roller sets 300 are respectively disposed at the top ends of the two brackets 110.
As shown in fig. 4, the roller set 300 includes two bearing assemblies 310 symmetrically disposed, and the two bearing assemblies 310 are in rolling contact with both sides of the static balancing shaft 200 in the radial direction, respectively.
As shown in fig. 3, the bearing assembly 310 includes a bearing housing 311, an adjustment pad 312, and two bearings 313 adjacently disposed.
The bearings 313 are arranged in pairs to improve the bearing capacity thereof.
The bearing housing 311 includes a base plate 3113, two connecting plates 3111 disposed on the base plate 3113, and a connecting shaft 3112 having two ends connected to the two connecting plates, respectively.
The two connection plates are defined as a first connection plate 3111 and a second connection plate 3114, respectively. The first coupling plate 3111 and the second coupling plate 3114 are disposed on the bottom plate 3113 at an interval.
First connecting holes are formed in the first connecting plate 3111, and second connecting holes are formed in the second connecting plate 3114.
The first end of the connecting shaft 3112 extends from the first connecting hole, and the two are in interference fit. The second end of the connecting shaft 3112 extends out of the second connecting hole, and the two are in interference fit.
A stopper ring 3115 is provided at a first end of the connection shaft 3112, and the stopper ring 3115 abuts against the first connection plate 3111.
A second end of the connecting shaft 3112 is provided with a groove, and the clamp spring 3116 is clamped into the groove and abuts against the second connecting plate 3114.
Thereby, axial positioning of the connecting shaft 3112 and the first and second connecting plates 3111 and 3114 is achieved.
Two bearings 313 arranged adjacently are fitted around the connecting shaft 3112 and rotationally contact the connecting shaft 3112.
Both bearings 313 are disposed between the two connection plates 3111.
In order to position the counter-weight propeller 500, a first positioning portion 410 and a second positioning portion 420 are provided, the first positioning portion 410 is used for positioning a first end of the counter-weight propeller 500, and the second positioning portion 420 is used for positioning a second end of the counter-weight propeller 500.
In order to position the first positioning portion 410 and the second positioning portion 420, a positioning ring 210 and an external thread portion 220 are provided at an interval on the static balance shaft 200.
As shown in fig. 1 and 2, the first positioning portion 410 includes a first tapered sleeve 411 and a first adjustment sleeve 412.
The first adjusting sleeve 412 is sleeved outside the static balance shaft 200, and one end of the first adjusting sleeve 412 abuts against the first positioning portion 410.
The other end of the first adjusting sleeve 412 abuts against the first end of the first conical sleeve 411. The second end of the first conical sleeve 411 abuts against the first end of the heavy duty propeller 500.
The cross-sectional area of the first end of first tapered sleeve 411 is greater than the cross-sectional area of the second end of first tapered sleeve 411.
The second end of the first conical sleeve 411 extends into the first end of the through hole. Thereby enabling the positioning of the first end of the heavy duty propeller 500.
After the first positioning portion 410 is sleeved outside the static balance shaft 200, the heavy-duty propeller 500 is sleeved outside the static balance shaft 200, and the second end of the first conical sleeve 411 extends into the first end of the through hole of the heavy-duty propeller 500, so that the first conical sleeve 411 positions the first end of the heavy-duty propeller 500.
The cross-sectional area of the first end of second tapered sleeve 421 is less than the cross-sectional area of the second end of second tapered sleeve 421.
The second conical sleeve 421 is sleeved outside the static balance shaft 200, and a first end of the second conical sleeve 421 extends into a second end of the through hole of the heavy-duty propeller 500.
Then, the second adjusting sleeve 422 is sleeved outside the static balance shaft 200, and one end of the second adjusting sleeve 422 abuts against the second end of the second conical sleeve 421.
In order to achieve the position locking of the connection relationship, the locking nut 423 is further sleeved outside the static balance shaft, and the locking nut 423 rotates relative to the external thread part 220 until the locking nut 423 abuts against the second end of the second adjusting sleeve 422. Thereby achieving the position locking of the heavy propeller 500.
The weight of the first tapered sleeve 411, the first adjusting sleeve 412, the second tapered sleeve 421, the second adjusting sleeve 422 and the locking nut 423 are all large. A plurality of first hoisting holes are formed in the first conical sleeve 411, a plurality of second hoisting holes are formed in the first adjusting sleeve 412, a plurality of third hoisting holes 4211 are formed in the second conical sleeve 421, a plurality of fourth hoisting holes 4221 are formed in the second adjusting sleeve 422, and a fifth hoisting hole 4231 is formed in the locking nut 423.
To accommodate different sizes of heavy propellers 500, the widths of first and second adjustment sleeves 412, 422 are adjustable. Thereby improving the applicability of the test device.
In the foregoing description of embodiments, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The utility model provides a heavy screw static balance test device of boats and ships which characterized in that includes:
the static balance shaft is provided with a positioning ring and an external thread part at intervals;
the number of the roller groups is two;
a first positioning portion for positioning a first end of the heavy duty propeller;
a second positioning part, the second end of which is provided with an internal thread part, and the second positioning part is used for positioning the second end of the heavy-duty propeller;
the base assembly comprises a concrete pit and two brackets which are oppositely arranged at two sides of the concrete pit;
the two roller groups are respectively arranged at the upper ends of the two supports, two ends of the static balance shaft are respectively in rolling contact with the two roller groups, two ends of the first positioning part are respectively abutted to the positioning ring and the first end of the propeller after the static balance shaft is sleeved on the first positioning part, the second end of the second positioning part is in threaded connection with the static balance shaft, and the first end of the second positioning part is abutted to the second end of the propeller.
2. The static balance test device for the heavy-duty propeller of the ship according to claim 1, wherein the first positioning portion comprises a first tapered sleeve and a first adjusting sleeve, one end of the first adjusting sleeve abuts against the positioning ring, the other end of the first adjusting sleeve abuts against a first end of the first tapered sleeve, and a second end of the first tapered sleeve abuts against a first end of the heavy-duty propeller.
3. The marine heavy duty propeller static balance test apparatus of claim 2, wherein a cross-sectional area of a first end of the first tapered sleeve is greater than a cross-sectional area of a second end of the first tapered sleeve, the second end of the first tapered sleeve extending into a first end of the through-hole of the heavy duty propeller.
4. The static balance test device for the heavy propeller of the ship according to claim 2, wherein the second positioning portion comprises a second tapered sleeve, a second adjusting sleeve and a locking nut, a first end of the second tapered sleeve abuts against a second end of the propeller, a second end of the second tapered sleeve abuts against one end of the second adjusting sleeve, the other end of the second adjusting sleeve abuts against the locking nut, and the locking nut is in threaded connection with the external threaded portion.
5. The marine heavy propeller static balance test apparatus of claim 4, wherein a cross-sectional area of a first end of the second tapered sleeve is smaller than a cross-sectional area of a second end of the second tapered sleeve, the first end of the second tapered sleeve extending into the second end of the through hole of the propeller.
6. The marine heavy propeller static balance test device of claim 1, wherein the roller train comprises two bearing assemblies which are symmetrically arranged relative to the radial direction of the static balance shaft, the bearing assemblies comprise a bearing seat, an adjusting pad and two adjacent bearings, the two bearings are rotatably connected in the bearing seat, and the adjusting pad is arranged between the bearings and the bearing seat.
7. The ship heavy propeller static balance test device of claim 6, wherein the bearing seat comprises a bottom plate, two connecting plates oppositely arranged on the bottom plate, and a connecting shaft connected to the two connecting plates, the two bearings are sleeved on the connecting shaft, and the two bearings are arranged in the two connecting plates.
8. The ship heavy propeller static balance test device of claim 7, wherein the two connecting plates are defined as a first connecting plate and a second connecting plate respectively, the first connecting hole is formed in the first connecting plate, the second connecting hole is formed in the second connecting plate, the first end of the connecting shaft extends out of the first connecting hole, the second end of the connecting shaft extends out of the second connecting hole, the first end of the connecting shaft is provided with a stop ring, the stop ring abuts against the first connecting plate, the second end of the connecting shaft is provided with a groove, and the snap spring is clamped into the groove to connect the connecting shaft with the second connecting plate.
9. The ship heavy propeller static balance test device of claim 2, wherein a plurality of first lifting holes are formed in the first conical sleeve, and a plurality of second lifting holes are formed in the first adjusting sleeve.
10. The ship heavy propeller static balance test device of claim 4, wherein a plurality of third hoisting holes are formed in the second conical sleeve, and a plurality of fourth hoisting holes are formed in the second adjusting sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220687312.4U CN217276675U (en) | 2022-03-28 | 2022-03-28 | Static balance test device for heavy propeller of ship |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220687312.4U CN217276675U (en) | 2022-03-28 | 2022-03-28 | Static balance test device for heavy propeller of ship |
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| Publication Number | Publication Date |
|---|---|
| CN217276675U true CN217276675U (en) | 2022-08-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220687312.4U Expired - Fee Related CN217276675U (en) | 2022-03-28 | 2022-03-28 | Static balance test device for heavy propeller of ship |
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| CN (1) | CN217276675U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116577020A (en) * | 2023-07-13 | 2023-08-11 | 常州市中海船舶螺旋桨有限公司 | Marine screw static balance check out test set |
-
2022
- 2022-03-28 CN CN202220687312.4U patent/CN217276675U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116577020A (en) * | 2023-07-13 | 2023-08-11 | 常州市中海船舶螺旋桨有限公司 | Marine screw static balance check out test set |
| CN116577020B (en) * | 2023-07-13 | 2023-10-20 | 常州市中海船舶螺旋桨有限公司 | Marine screw static balance check out test set |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220823 |
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| CF01 | Termination of patent right due to non-payment of annual fee |