CN112922715A

CN112922715A - Outboard engine cooling pump structure

Info

Publication number: CN112922715A
Application number: CN202110225076.4A
Authority: CN
Inventors: 陆剑青; 张华杰; 徐宏杰; 周伟; 陆峰
Original assignee: Zhejiang Canglong Power Machinery Co ltd
Current assignee: Zhejiang Canglong Power Machinery Co ltd
Priority date: 2021-03-01
Filing date: 2021-03-01
Publication date: 2021-06-08
Anticipated expiration: 2041-03-01
Also published as: CN112922715B

Abstract

The invention discloses an outboard engine cooling pump structure, and relates to the technical field of liquid pumps. It includes the water pump inner shell, and impeller subassembly cup joints with water pump inner shell inner chamber, and water pump inner shell open end and impeller backing plate sealing connection, impeller backing plate are equipped with the inlet opening, and impeller backing plate lower surface and water pump seat subsides connect, and the water pump inner shell is equipped with the delivery port, and in the water pump inner shell embedding water pump shell cavity, the water pump shell passes through impeller backing plate and water pump seat fixed connection, outlet pipe and delivery port intercommunication, inlet tube and inlet opening intercommunication. The impeller component comprises a disk-shaped wheel body and a plurality of blades fixedly connected with the wheel body. The blades are uniformly distributed on the side surface of the wheel body to radially extend. The invention solves the technical problem that the cooling effect of an engine is influenced due to insufficient pumping capacity and lift height of the water pump of the outboard engine in the prior art. The invention has the beneficial effects that: the outboard engine water pump has high lift and large water outlet impact force, and is suitable for cooling various outboard engines. The pump water volume of the water pump is large, and the cooling effect of the engine of the outboard engine is good.

Description

Outboard engine cooling pump structure

Technical Field

The invention relates to the technical field of liquid pumps, in particular to a structure of an outboard engine cooling pump.

Background

With the rapid increase of national economy, people not only have great changes in the aspect of wearing, but also have more options for playing items in leisure time. The water entertainment project is a favorite among the water entertainment projects. The water boat sprint or water fishing and the like are a good familiarity and friendship promoting way among families or friends. The water entertainment project uses outboard engine. The integral structure of the outboard engine is divided into an upper part, a middle part and a lower part which are respectively an engine power group, an above-water component group and an underwater gear transmission group. In order to realize various power outputs, the outboard engine drives a gear box of an underwater part through power transmission of a driving shaft by the work generated by the repeated motion of a crankshaft piston of an engine, so as to drive a propeller to generate driving force. Most of the current common outboard engines adopt water flow to guide and cool the engine so as to prevent the engine from generating high temperature during normal operation to cause abnormal functions of the engine. When the driving shaft rotates, the water pump impeller connected in a clamping groove mode rotates, the negative pressure type water absorption is carried out from the underwater water inlet, then water is supplied upwards continuously, and the water flow is provided for cooling the engine. The existing outboard engine water pump has the problems of insufficient water pumping quantity and unsatisfactory lift height, and the cooling effect of an engine is influenced.

Disclosure of Invention

The invention provides an outboard engine cooling pump structure which is large in water pumping quantity, capable of increasing water outlet impact force and capable of improving lift, and aims to overcome the defects that in the prior art, the pump water quantity of an outboard engine water pump is insufficient, the lift height is not ideal, and the cooling effect of an engine is affected.

In order to achieve the purpose, the invention adopts the following technical scheme: an outboard engine cooling pump structure comprises a drive shaft, a water pump outer shell, a water pump inner shell, an impeller assembly, an impeller backing plate and a water pump seat, wherein the water pump outer shell, the water pump inner shell, the impeller assembly, the impeller backing plate and the water pump seat are sequentially sleeved from top to bottom with the drive shaft, the water pump inner shell is in a cylindrical shape, the impeller assembly is sleeved with an inner cavity of the water pump inner shell, the open end of the water pump inner shell is hermetically connected with the impeller backing plate, the impeller backing plate is provided with a water inlet hole communicated with the inner cavity of the water pump inner shell, the lower surface of the impeller backing plate is attached to the water pump seat, the water pump inner shell is provided with a water outlet communicated with the inner cavity of the water pump inner shell, the water pump outer shell is in a cylindrical structure with an open lower end, the water pump inner, the water inlet pipe is communicated with the water inlet hole, the impeller assembly comprises a disc-shaped wheel body and a plurality of blades fixedly connected with the wheel body, and the blades are uniformly distributed on the side surface of the wheel body and radially extend.

The impeller assembly is sleeved with the inner water pump shell, the inner water pump shell is hermetically connected with the impeller backing plate, the inner water pump shell is embedded into the outer water pump shell, the opening end of the outer water pump shell is fixedly connected with the water pump base, the driving shaft is sleeved with the impeller assembly and drives the impeller assembly to rotate through the key, the driving shaft is connected with the motor output shaft of the outboard engine, the motor rotates to drive the driving shaft to rotate, the driving shaft drives the impeller assembly to rotate, and the rotating cavities are formed by the adjacent two blades, the side surface of the wheel body, the side surface of the inner water pump shell, the bottom. The span of the water outlet fan ring is larger than the space between the adjacent blades of the impeller component. Under the quick rotation of the impeller assembly, water is sucked into the rotating cavity from the water inlet pipe of the water pump seat, and the rotating cavity is discharged after being transferred to the water outlet, so that the motor is cooled. The impeller assembly has high rotating speed, good sealing performance due to the connection of the impeller assembly and the inner shell of the water pump, large impact force for pumping water, high water pumping lift and large water pumping amount.

Preferably, the end surface of the wheel body is provided with a raised bottom ring, the bottom ring is a circular ring concentric with the wheel body, and the raised surface of the bottom ring and the end surface of the wheel body form a step. Two terminal surfaces of wheel body all are equipped with the foundation ring, reduce the wheel body respectively with the area of contact of water pump inner shell bottom surface and impeller backing plate upper surface, reduce the rotatory resistance of wheel body, have certain flexible simultaneously at the water pump shell when water pump seat is fixed, strengthen the leakproofness, improve the impact force of pump play water.

Preferably, the blade is wedge-shaped, the thick end of the blade is fixedly connected with the wheel body, the sharp end of the blade is suspended, the side surface of the blade is provided with a raised barrier strip, and the raised surface of the barrier strip and the side surface of the blade form a step. The end surface of the baffle bar positioned at the thick end of the blade is fixedly connected with the side surface of the bottom ring. The stop bars of adjacent blades are connected with the bottom ring into a U shape. The wedge surface of the blade and the side surface of the wheel body form a movable part of a U-shaped rotating cavity. The stop strips are positioned on two adjacent side surfaces of the wedge surfaces of the blades, and the U-shaped cavity formed by connecting the stop strips and the bottom ring increases the volume of the U-shaped cavity formed by the wedge surfaces of the blades and the side surface of the wheel body, so that the water yield of the pump is increased.

Preferably, the blade is connected with a top column, the top column is a cylinder, the side face of the top column is fixedly connected with the suspended end of the blade, the side face, corresponding to the blade fixed connecting portion, of the top column is tightly pressed against the side face of the inner cavity of the water pump inner shell, and the end face of the top column is flush with the protruding face of the stop strip. The support pillar increases the attaching degree of the blade and the side wall of the inner shell of the water pump, and improves the impact force of water outlet of the pump.

Preferably, the end face of the wheel body connected with the inner shell of the water pump is provided with a first guide strip and a second guide strip which are raised, the raised surfaces of the first guide strip and the second guide strip are flushed with the raised surface of the foundation ring, one ends of the first guide strip and the second guide strip are fixedly connected with the side face of the foundation ring respectively, and the other ends of the first guide strip and the second guide strip are flushed with the side face of the wheel body respectively. The water in the rotating cavity is pushed and guided, and the pumping lift is increased.

Preferably, the first guide bar and a normal line at the joint of the first guide bar and the bottom ring form an alpha included angle, the second guide bar and a normal line at the joint of the second guide bar and the bottom ring form a beta included angle, and the beta included angle is larger than the alpha included angle. The water between the first guide strip and the second guide strip can be discharged along the outer side of the first guide strip in a guiding mode, the impact force of pumping water is improved, and the pumping lift is increased.

Preferably, the first guide strip and the second guide strip are obliquely arranged with the side surface of the bottom ring, the wheel body rotates, one end of the first guide strip, which is flush with the side surface of the wheel body, reaches the water outlet before the end of the first guide strip, which is fixedly connected with the side surface of the bottom ring, is flush with the side surface of the wheel body, reaches the water outlet before the end of the second guide strip, which is fixedly connected with the side surface of the bottom ring, is flush with the side surface of the wheel body, and the first guide strip reaches the water outlet before the second guide strip. The water between the first guide bar and the second guide bar is firstly pushed by the second guide bar and is guided by the first guide bar to be discharged to the water outlet, the whole water is dispersed through the guide bars, and the discharged water has more impact force and higher lift due to continuous twice guiding.

Preferably, the impeller assembly is provided with an embedded part, the embedded part is cylindrical, connecting grooves are evenly distributed in the outer side face of the embedded part, the connecting grooves penetrate through the end face of the embedded part, a wheel inner hole is formed in the wheel body, a connecting strip for protruding the hole wall is arranged in the wheel inner hole, the connecting strip is embedded into the connecting grooves, and the wheel body is fixedly connected with the embedded part. The length direction of the connecting groove is parallel to the axis of the insert. The connecting strip is a strip with a rectangular section, and the section of the connecting strip is the same as the section of the connecting groove in shape and size. After the connecting strip is embedded into the connecting groove wheel body and fixedly connected with the embedded part, the impeller assembly rotates the embedded part and the wheel body and cannot slide. In order to improve the sealing performance of the rotating cavity, the impeller is usually made of elastic materials such as rubber, and the insert is made of rigid materials, so that the strength of the impeller assembly is improved, and the impact force of pumping water is improved.

Preferably, the insert is provided with an insert connecting hole matched with the driving shaft, the insert connecting hole is concentric with the wheel body, the water pump inner shell is provided with an inner shell connecting shaft hole matched with the driving shaft, the axis of the inner shell connecting shaft hole is overlapped with the axis of the water pump inner shell, and the center A of the insert connecting hole and the center B of the inner shell connecting shaft hole are provided with an eccentric distance H. The circle center B of the inner shell connecting shaft hole is positioned between the circle center A of the insert connecting hole and the water outlet. The blades on one side of the water inlet are pressed, the blades on one side of the water outlet have a micro extending space, the blades are made of elastic materials, water in the rotating cavity is driven by the pressing and extending, the water discharging impact force of the impeller assembly is increased, and the water outlet lift is improved.

Preferably, the opening end face of the water pump inner shell is provided with an annular groove, the groove is connected with a sealing ring, the sealing ring is annular, the cross section of the sealing ring is circular, and the water pump inner shell is connected with the upper surface of the impeller base plate in a sealing mode through the sealing ring. The sealing ring is embedded into the groove but does not completely fall into the groove, and the sealing ring exposed out of the groove plays a sealing role when the inner shell of the water pump is tightly pressed with the upper surface of the impeller base plate. The sealing ring is embedded into the groove before installation, so that the sealing ring alignment procedure is reduced, and the installation is convenient.

The invention has the beneficial effects that: the outboard engine water pump has high lift and large water outlet impact force, is suitable for cooling engines of various outboard engines, and has wide application range. The pump water volume of water pump is big, and outboard engine's engine cooling effect is good, delays outboard engine life, reduces use cost, improves use comfort.

Drawings

FIG. 1 is an exploded view of the present invention;

FIG. 2 is a front view of the impeller assembly;

FIG. 3 is a schematic view of the connection of an impeller assembly with an inner casing of a water pump;

FIG. 4 is a schematic view of the connection between the inner shell and the sealing ring of the water pump.

In the figure: the water pump comprises a driving shaft 1, a water pump outer shell 2, a water pump inner shell 3, an impeller assembly 4, a sealing ring 5, an impeller base plate 6, a water pump seat 7, a key 11, a water outlet pipe 21, a water outlet 31, an inner shell connecting shaft hole 32, a wheel body 41, a blade 42, a first guide strip 43, a second guide strip 44, an insert 45, a connecting strip 46, a water inlet hole 61, a bottom ring 411, a blocking strip 421, a top column 422, an insert connecting hole 451 and a key groove 452.

Detailed Description

The invention is further described with reference to the following figures and detailed description.

Example 1:

as shown in fig. 1 and 2, the outboard engine cooling pump structure comprises a driving shaft 1, a water pump outer shell 2, a water pump inner shell 3, an impeller assembly 4, an impeller backing plate 6 and a water pump seat 7, which are sequentially sleeved with the driving shaft 1 from top to bottom. The water pump inner shell 3 is in a barrel shape. The diameter of the barrel of the inner shell 3 of the water pump of the embodiment is 36 mm. The impeller component 4 is sleeved with the inner cavity of the water pump inner shell 3. The opening end of the water pump inner shell 3 is hermetically connected with the impeller backing plate 6. The impeller backing plate 6 is provided with a water inlet 61 communicated with the inner cavity of the water pump inner shell 3. The lower surface of the impeller backing plate 6 is attached to the water pump seat 7. The water pump inner shell 3 is provided with a water outlet 31 communicated with the inner cavity of the water pump inner shell 3. The water outlet 31 is fan-shaped. The water pump shell 2 is a cylindrical structure with an opening at the lower end. The water pump inner shell 3 is embedded in the cavity of the water pump outer shell 2. The water pump shell 2 is fixedly connected with a water pump seat 7 through an impeller backing plate 6. The water pump shell 2 is provided with a water outlet pipe 21. The water outlet pipe 21 is communicated with the water outlet 31. The water pump base 7 is provided with a water inlet pipe. The water inlet pipe is communicated with the water inlet hole 61. The impeller assembly 4 includes a disk-shaped impeller body 41 and a plurality of blades 42 fixedly connected to the impeller body 41. The blades 42 are uniformly distributed on the side surface of the wheel body 41 to radially extend. The drive shaft 1 is connected with a key 11. The key 11 is partially inserted into the drive shaft 1 and partially protrudes from the surface of the drive shaft 1.

As shown in fig. 2, the end surface of the wheel body 41 is provided with a raised bottom ring 411. The bottom ring 411 is a circular ring concentric with the wheel body 41. The convex surface of the bottom ring 411 forms a step with the end surface of the wheel body 41. The vanes 42 are wedge-shaped. The thick end of the blade 42 is fixedly connected with the wheel body 41. The sharp ends of the blades 42 are cantilevered. The side of the vane 42 is provided with a raised stop 421. The convex surface of the stop strip 421 forms a step with the side surface of the vane 42. The end surface of the stop strip 421 at the thick end of the vane 42 is fixedly connected with the side surface of the bottom ring 411. The stop bars 421 of adjacent blades 42 are connected to the bottom ring 411 in a U-shape. The blade 42 is attached to a top post 422. The top post 422 is a cylinder. The side of the top post 422 is fixedly connected with the free end of the blade 42. The side surface of the top column 422 corresponding to the fixed connection part of the blade 42 is pressed with the side surface of the inner cavity of the inner shell 3 of the water pump. The end surface of the top post 422 is flush with the raised surface of the stop bar 421. The end surface of the wheel body 41 connected with the water pump inner shell 3 is provided with a first guide bar 43 and a second guide bar 44 which are raised. The convex surfaces of the first and second guide bars 43 and 44 are flush with the convex surface of the bottom ring 411. One end of each of the first and second guide bars 43 and 44 is fixedly connected to the side of the bottom ring 411. The other ends of the first guide bar 43 and the second guide bar 44 are respectively flush with the side surface of the wheel body 41. The first conducting bar 43 forms an angle α with the normal line at the junction of the first conducting bar 43 and the foundation ring 411. The second conducting bar 44 forms an included angle β with a normal line at a connection position of the second conducting bar 44 and the foundation ring 411, and the included angle β is larger than the included angle α.

As shown in fig. 2 and 3, the first guide bar 43 and the second guide bar 44 are arranged obliquely with respect to the side surface of the bottom ring 411, and the wheel body 41 rotates. The end of the first guide bar 43 flush with the side surface of the wheel body 41 reaches the water outlet 31 before the end of the first guide bar 43 fixedly connected with the side surface of the bottom ring 411. The end of the second guide bar 44 flush with the side surface of the wheel body 41 reaches the water outlet 31 earlier than the end of the second guide bar 44 fixedly connected with the side surface of the bottom ring 411. The first guide bar 43 reaches the water outlet 31 before the second guide bar 44. The impeller assembly 4 is provided with an insert 45. The insert 45 is cylindrical. The outer side of the insert 45 is evenly provided with connecting grooves. The connecting groove penetrates through the end face of the insert 45. The wheel body 41 is provided with a wheel inner hole. The wheel bore is provided with a web 46 of raised bore walls. The connecting strip 46 is inserted into the connecting groove, and the wheel body 41 is fixedly connected with the insert 45. The insert 45 is provided with an insert attachment hole 451 that matches the drive shaft 1. The insert attachment hole 451 is concentric with the wheel body 41. The water pump inner shell 3 is provided with an inner shell connecting shaft hole 32 matched with the driving shaft 1, and the axis of the inner shell connecting shaft hole 32 is superposed with the axis of the water pump inner shell 3. The center of the insert connecting hole 451 is eccentric distance H from the center of the inner shell connecting shaft hole 32. The eccentricity H in this example is 1.3 mm. The insert attachment hole 451 is provided with a key groove 452, and when mounted, the key 11 is inserted into the key groove 452 by protruding the surface portion of the drive shaft 1.

As shown in fig. 4, the open end face of the inner shell 3 of the water pump is provided with a circular groove. The groove is connected with a sealing ring 5. The seal ring 5 is annular and has a circular cross section. The water pump inner shell 3 is connected with the upper surface of the impeller backing plate 6 in a sealing way through a sealing ring 5.

As shown in fig. 1 and 3, when in use, two adjacent blades 42, the side surface of the wheel body 41, the side surface of the water pump inner shell 3, the bottom surface of the water pump inner shell 3 and the upper surface of the impeller backing plate 6 form a rotating cavity. The driving shaft 1 is driven by a motor shaft (not shown) to rotate at a high speed, the rotating cavity sucks water from the water inlet hole 61, and the water is discharged from the water outlet 31 after the water is rotated. In the water discharge process, water between the first guide bars 43 and the blades 42 is firstly pushed by the first guide bars 43 and discharged to the water outlet 31, water between the first guide bars 43 and the second guide bars 44 is firstly pushed by the second guide bars 44, the water is guided by the first guide bars 43 and discharged to the water outlet 31, the whole water is dispersed through the guide bars, the discharged water has more impact force due to continuous twice guiding, and the lift is higher.

Claims

1. The utility model provides an outboard engine cooling pump structure which characterized in that: the impeller type water pump comprises a driving shaft (1), a water pump outer shell (2) sequentially sleeved with the driving shaft (1) from top to bottom, a water pump inner shell (3), an impeller assembly (4), an impeller base plate (6) and a water pump seat (7), wherein the water pump inner shell (3) is in a barrel shape, the impeller assembly (4) is sleeved with an inner cavity of the water pump inner shell (3), an open end of the water pump inner shell (3) is hermetically connected with the impeller base plate (6), the impeller base plate (6) is provided with a water inlet hole (61) communicated with the inner cavity of the water pump inner shell (3), the lower surface of the impeller base plate (6) is attached to the water pump seat (7), the water pump inner shell (3) is provided with a water outlet (31) communicated with the inner cavity of the water pump inner shell (3), the water outlet (31) is in a fan-ring shape, the water pump outer shell (2), water pump shell (2) are through impeller backing plate (6) and water pump seat (7) fixed connection, water pump shell (2) are equipped with outlet pipe (21), outlet pipe (21) and delivery port (31) intercommunication, water pump seat (7) are equipped with the inlet tube, inlet tube and inlet opening (61) intercommunication, impeller subassembly (4) include discoid wheel body (41), a plurality of blades (42) with wheel body (41) fixed connection, blade (42) equipartition becomes radial extension in the side of wheel body (41).

2. The outboard engine cooling pump structure according to claim 1, wherein: the end face of the wheel body (41) is provided with a raised bottom ring (411), the bottom ring (411) is a circular ring concentric with the wheel body (41), and the raised face of the bottom ring (411) and the end face of the wheel body (41) form a step.

3. The outboard engine cooling pump structure according to claim 2, wherein: blade (42) are the wedge form, the butt and wheel body (41) fixed connection of blade (42), the sharp-end of blade (42) is unsettled, the side of blade (42) is equipped with bellied shelves strip (421), the bellied face and the blade (42) side of shelves strip (421) form the step, the terminal surface and the foundation ring (411) side fixed connection of the shelves strip (421) that are located blade (42) butt, the shelves strip (421) and the foundation ring (411) of adjacent blade (42) connect into the U-shaped.

4. The outboard engine cooling pump structure according to claim 3, wherein: blade (42) are connected with fore-set (422), fore-set (422) are the cylinder, the side of fore-set (422) and the free end fixed connection of blade (42), the side that fore-set (422) and blade (42) fixed connection correspond compresses tightly with water pump inner shell (3) inner chamber side, the terminal surface of fore-set (422) flushes with the bellying face of shelves strip (421).

5. The outboard engine cooling pump structure according to claim 2 or 4, wherein: the end face that wheel body (41) and water pump inner shell (3) are connected is equipped with bellied first conducting bar (43), second conducting bar (44), the bellied face of first conducting bar (43), second conducting bar (44) flushes with the bellied face of foundation ring (411) flush, the one end of first conducting bar (43), second conducting bar (44) respectively with the side fixed connection of foundation ring (411), the other end of first conducting bar (43), second conducting bar (44) flushes with wheel body (41) side respectively.

6. The outboard engine cooling pump structure according to claim 6, wherein: the first conducting bar (43) and the normal line of the joint of the first conducting bar (43) and the foundation ring (411) form an alpha included angle, the second conducting bar (44) and the normal line of the joint of the second conducting bar (44) and the foundation ring (411) form a beta included angle, and the beta included angle is larger than the alpha included angle.

7. The outboard engine cooling pump structure according to claim 6, wherein: the first guide strip (43) and the second guide strip (44) are obliquely arranged with the side surface of the bottom ring (411), the wheel body (41) rotates, one end of the first guide strip (43) which is flush with the side surface of the wheel body (41) reaches the water outlet (31) before the end of the first guide strip (43) which is fixedly connected with the side surface of the bottom ring (411) is fixedly connected with the side surface of the wheel body, one end of the second guide strip (44) which is flush with the side surface of the wheel body (41) reaches the water outlet (31) before the end of the second guide strip (44) which is fixedly connected with the side surface of the bottom ring (411) is fixedly connected with the water outlet, and the first guide strip (43) reaches the water outlet (31) before the second guide strip.

8. The outboard engine cooling pump structure according to claim 1, wherein: impeller subassembly (4) are equipped with inserts (45), inserts (45) are cylindric, inserts (45) lateral surface equipartition has the spread groove, the spread groove link up inserts (45) terminal surface, wheel body (41) are equipped with the wheel hole, the wheel hole is equipped with connecting strip (46) of protruding pore wall, connecting strip (46) embedding spread groove, wheel body (41) and inserts (45) fixed connection.

9. The outboard engine cooling pump structure according to claim 8, wherein: insert (45) are equipped with drive shaft (1) assorted inserts connecting hole (451), inserts connecting hole (451) and wheel body (41) centre of a circle, water pump inner shell (3) are equipped with and link shaft hole (32) with drive shaft (1) assorted inner shell, and the inner shell is connected shaft hole (32) axis and water pump inner shell (3) axis coincidence, the centre of a circle of inserts connecting hole (451) and the centre of a circle that the inner shell links shaft hole (32) are equipped with eccentric distance H.

10. The outboard engine cooling pump structure according to claim 1, wherein: the water pump inner shell (3) opening end face is equipped with annular recess, groove connection has sealing washer (5), sealing washer (5) are the ring form and the cross-section becomes circular, water pump inner shell (3) are through sealing washer (5) and impeller backing plate (6) upper surface sealing connection.