CN2702913Y - Double-wheel horizontal propeller for ship - Google Patents
Double-wheel horizontal propeller for ship Download PDFInfo
- Publication number
- CN2702913Y CN2702913Y CN 200420018581 CN200420018581U CN2702913Y CN 2702913 Y CN2702913 Y CN 2702913Y CN 200420018581 CN200420018581 CN 200420018581 CN 200420018581 U CN200420018581 U CN 200420018581U CN 2702913 Y CN2702913 Y CN 2702913Y
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- CN
- China
- Prior art keywords
- impeller
- water inlet
- water
- pump
- case
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a double-wheel horizontal propeller for ship, comprising a reverse-rotating double-impeller structure. The double-impeller is provided with at a level position (horizontal) to cancel the water in-flow course. The current directions from both the water inlet and outlet are vertical. The pump shell can be completely immerged into water, under the help of the sealing pieces and the openning hole at the bottom of the ship; the gear case is inside the ship without contacting water. The gear case is provided with a level input shaft and two plumbing output shafts rotating in reversal directions. Inside the pump shell, two impellers with equal diameters are respectively installed at the ends of the two output shafts. The impeller can be the closed-pattern used in a centrifugal pump and the corresponding water inlet is designed in the lower end face of the pump shell; the impeller can also be the opened straight pattern, and the corresponding water inlet is installed in the cylinders on the two sides of the pump shells. The water outlet in the pump shell is in the direction of vertical axis along the ship. The utility model is simple in structure and the cancelling of the water in-flow course can avoid cavitation possibility; and the vertical water inlet and outlet axes can increase the momentum variation and thrust.
Description
Technical field
The horizontal propelling unit of a kind of two-wheel peculiar to vessel can become the transformation of energy that marine main engine produces the kinetic energy of motion of ship, belongs to marine propulsion.
Background technology
Marine propulsion is of a great variety, and common several big class has paddlewheel propulsion device, propeller, straight leaf propelling unit, injection (water spray, spraying, jet) propelling unit etc., and multiple different version is arranged again in every class.They show merits and faults separately in different running environment, learn from other's strong points to offset one's weaknesses each other, should not be simply alternative, but it is still necessary and possible that some version is made improvement.
With regard to waterjet propulsor, its main pump has the branch of axial-flow pump, mixed flow pump, centrifugal pump, also has to install screw propeller additional in specific pipeline; Although the water inlet form of main pump is varied, can be divided into two kinds basically: total pressure type (also claiming the Pitot tubular type) and static pressure type (also claiming flush type).No matter adopt which kind of water inlet form, one section water inlet flow channel is generally all arranged, because of flow passage resistance force of waterproof causes flow losses even generation " cavitation " phenomenon, reduced propulsion coefficient inevitably.
Summary of the invention
The horizontal propelling unit of a kind of two-wheel peculiar to vessel, be under the situation of the existing waterjet propulsor structure and layout shortcoming of comprehensive analyses,, adjust the main pump structure by selecting suitable water inlet form for use, shorten (or cancellation) water inlet flow channel, to reach the purpose of simplified structure, raising propulsion coefficient.
Make a general survey of the elementary design theory of propelling unit, substantially all be based on momentum theorem, the power (abbreviating thrust as) that promptly promotes motion of ship derives from the change amount (last momentum and initial momentum poor) of the fluid momentum that propelling unit agitates.The angle of rake computation model of ideal spiral oar also is consequent.This brass tacks is told us: just the size and Orientation of (import current) momentum influences the size of thrust.Therefore, if ignore of the influence of " cavitation " this physical phenomenon, when the water inlet form of waterjet propulsor is changed into static pressure type by total pressure type to thrust, the component of initial momentum on the reversing sense that advances will be changed, make it to reduce, corresponding momentum change amount increases, and thrust also increases.
The horizontal angle of rake water inlet of two-wheel peculiar to vessel disclosed in the utility model adopts static pressure type.For preventing to produce " cavitation " phenomenon, cancellation water inlet flow channel, impeller level installation (being referred to as horizontal).For weight of equipment is symmetrically distributed as far as possible along the boats and ships axis, adopt the bilobed wheel structure.During two impeller contrarotations, current directly enter from the side or the lower surface of pump case, and the water outlet current are vertical mutually with the direction of water inlet current.
The horizontal propelling unit of two-wheel peculiar to vessel comprises gear case, pump case, impeller, sealing member.With bolt gear case and the pump case back that fuses is packed in the perforate of hull bottom by sealing member, so that pump case submerges, and gear case is positioned at hull interior, does not contact with water.Gear case is a seal case, does not play deceleration effort, only is used to adjust rotation direction, and it has a horizontal input shaft, two vertical output shafts that hand of rotation is opposite.A pair of bevel gear is arranged in gear case, be packed in respectively on input shaft and the output shaft, be used for the rotation of horizontal input shaft is transformed into the rotation of vertical output shaft.When two output shaft spacings big (size that depends on impeller), be the transmission gear of avoiding using diameter excessive, can between two gears that are packed on two output shafts, install two idle wheels additional, the reverse drive the when reverse drive that produces during promptly by four equal diameter pinion replaces two equal diameter big gear wheel engagements.In pump case, two isodiametric impellers are packed in the end of two output shafts respectively.According to designing requirement, when input shaft rotational speed is higher, adopt the enclosed impeller (when rotating, the negative pressure suction that the center produces) that uses on the centrifugal pump by impeller, correspondingly, water inlet is positioned on the lower surface of pump case; When input shaft rotational speed is low, adopt the straight leaf impeller of open type (no wheel disc, several blades directly are radial and are fixed on the wheel hub, drying during the blade rotation), correspondingly, water inlet is positioned on the cylinder wall of pump case both sides.No matter adopt which kind of impeller, the water outlet on the pump case is all along the boats and ships longitudinal axis.
Fairly obvious, said structure is simple, because of the cancellation water inlet flow channel, avoids producing " cavitation " phenomenon; Because of water inlet axis and water outlet axis normal, increased momentum change amount, promptly increased thrust.
Description of drawings
Fig. 1 adopts the horizontal propelling unit longitudinal profile of the two-wheel peculiar to vessel scheme drawing of centrifugal enclosed impeller
Fig. 2 adopts the horizontal propelling unit B1-B2 of the two-wheel peculiar to vessel section cross-sectional schematic of centrifugal enclosed impeller
Fig. 3 adopts the horizontal propelling unit longitudinal profile of the two-wheel peculiar to vessel scheme drawing of the straight leaf impeller of open type
Fig. 4 adopts the horizontal propelling unit B2-B2 of the two-wheel peculiar to vessel section cross-sectional schematic of the straight leaf impeller of open type
The horizontal angle of rake A-A section cross-sectional schematic of Fig. 5 two-wheel peculiar to vessel
The specific embodiment
Provide the specific embodiment of the present utility model below, and be illustrated in conjunction with the accompanying drawings.
The horizontal propelling unit of a kind of two-wheel peculiar to vessel is under the situation of the existing waterjet propulsor structure and layout shortcoming of comprehensive analyses, by selecting suitable water inlet form for use, adjust the main pump structure, shorten (or cancellation) water inlet flow channel, to reach the purpose of simplified structure, raising propulsion coefficient.
The horizontal angle of rake water inlet of two-wheel peculiar to vessel disclosed in the utility model adopts static pressure type.For preventing to produce " cavitation " phenomenon, cancellation water inlet flow channel, the installation of impeller level.For weight of equipment is symmetrically distributed along the boats and ships axis, adopt the two-wheel structure.During two impeller contrarotations, current directly enter from the perforate of the column side of pump case or lower surface, and the water outlet current are vertical mutually with the direction of water inlet current.
As Fig. 1, shown in Figure 3, the horizontal propelling unit of two-wheel peculiar to vessel comprises gear case 1, pump case 2, impeller 3, sealing member 4.With bolt gear case 1 and pump case 2 back that fuses is packed in the perforate of hull 0 bottom by sealing member 4, so that pump case 2 submerges, and gear case 1 is positioned at hull 0 inside, does not contact with water.Gear case 1 is a seal case, does not play deceleration effort, only is used to adjust rotation direction, and it has the opposite vertical output shaft 12 of 11, two hand of rotation of a horizontal input shaft.A pair of bevel gear 13 is arranged in gear case, be packed in respectively on input shaft 11 and the output shaft 12, be used for the rotation of horizontal input shaft 11 is transformed into the rotation of vertical output shaft 12.As shown in Figure 5, when the distance of 12 of two output shafts when big (size that depends on impeller 3), be the transmission gear of avoiding using diameter excessive, can between two gears 14 that are packed on two output shafts 12, install two idle wheels additional, the reverse drive the when reverse drive that produces during promptly by four equal diameter pinion replaces two equal diameter big gear wheel engagements.As Fig. 2, shown in Figure 4, in pump case 2, two isodiametric impellers 3 are packed in the end of two output shafts 12 respectively.According to designing requirement, when the rotating speed of input shaft 11 is higher, adopt the enclosed impeller 3 (during rotation, the center produces negative pressure, suction) that uses on the centrifugal pump, correspondingly, water inlet 21 is positioned on the lower surface of pump case 2; When the rotating speed of input shaft 11 hangs down, adopt the straight leaf impeller 3 of open type (by the blade drying of rotation), correspondingly, water inlet 21 is positioned on the cylinder wall of pump case 2 both sides.No matter adopt which kind of impeller 3, the water outlet 22 on the pump case 2 is all along the boats and ships longitudinal axis.
The utility model is simple in structure, because of the cancellation water inlet flow channel, avoids producing " cavitation " phenomenon; Because of water inlet axis and water outlet axis normal, increased momentum change amount, promptly increased thrust.
Claims (3)
1. the horizontal propelling unit of two-wheel peculiar to vessel comprises gear case (1), pump case (2), impeller (3), sealing member (4); It is characterized in that two impellers (3) are in horizontality, backward rotation, no water inlet flow channel, the water inlet water (flow) direction is vertical with the water outlet water (flow) direction; On the structure, with bolt gear case (1) and pump case (2) back that fuses is packed in the perforate of hull (0) bottom by sealing member (4), pump case (2) submerges, and gear case (1) is positioned at hull (0) inside, does not contact with water; Gear case (1) is a seal case, and a horizontal input shaft (11) is arranged, two vertical output shafts (12) that hand of rotation is opposite; A pair of bevel gear (13) is arranged in gear case, be packed in respectively on an input shaft (11) and the output shaft (12); Between two gears (14) that are packed on two output shafts (12), install two idle wheels additional, promptly produce the reverse drive of two output shafts (12) by four equal diameter gears (14) engagement; In pump case (2), two isodiametric impellers (3) are packed in the end of two output shafts (12) respectively; Process water inlet (21) and water outlet (22) on the pump case (2); Water outlet (22) is along the boats and ships longitudinal axis.
2. the horizontal propelling unit of two-wheel peculiar to vessel as claimed in claim 1 is characterized in that impeller (3) adopts the enclosed impeller that uses on the centrifugal pump, and water inlet (21) is positioned on the lower surface of pump case (2).
3. the horizontal propelling unit of two-wheel peculiar to vessel as claimed in claim 1 is characterized in that impeller (3) adopts the straight leaf impeller of open type, and water inlet (21) is positioned on the cylinder wall of pump case (2) both sides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420018581 CN2702913Y (en) | 2004-03-12 | 2004-03-12 | Double-wheel horizontal propeller for ship |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420018581 CN2702913Y (en) | 2004-03-12 | 2004-03-12 | Double-wheel horizontal propeller for ship |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2702913Y true CN2702913Y (en) | 2005-06-01 |
Family
ID=34769386
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420018581 Expired - Fee Related CN2702913Y (en) | 2004-03-12 | 2004-03-12 | Double-wheel horizontal propeller for ship |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2702913Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101177165B (en) * | 2006-11-07 | 2010-06-30 | 邓建军 | Duplex tube helix water jet propeller |
| CN103612736A (en) * | 2013-11-25 | 2014-03-05 | 武汉船用机械有限责任公司 | Water-jet propulsion system with gear case |
| CN107735315A (en) * | 2015-05-27 | 2018-02-23 | 安德烈亚斯·德施 | Hydro-jet propulsion system and the ship with hydro-jet propulsion system |
-
2004
- 2004-03-12 CN CN 200420018581 patent/CN2702913Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101177165B (en) * | 2006-11-07 | 2010-06-30 | 邓建军 | Duplex tube helix water jet propeller |
| CN103612736A (en) * | 2013-11-25 | 2014-03-05 | 武汉船用机械有限责任公司 | Water-jet propulsion system with gear case |
| CN107735315A (en) * | 2015-05-27 | 2018-02-23 | 安德烈亚斯·德施 | Hydro-jet propulsion system and the ship with hydro-jet propulsion system |
| US10689078B2 (en) | 2015-05-27 | 2020-06-23 | Andreas Desch | Waterjet propulsion system and watercraft having a waterjet propulsion system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |