CN101558244B

CN101558244B - Hydraulic pump

Info

Publication number: CN101558244B
Application number: CN200780045953.8A
Authority: CN
Inventors: F·西尼科; A·L·穆勒
Original assignee: DAB Pumps SpA
Current assignee: DAB Pumps SpA
Priority date: 2006-12-14
Filing date: 2007-12-04
Publication date: 2012-05-30
Anticipated expiration: 2027-12-04
Also published as: CN101558244A; ITPD20060449A1

Abstract

A hydraulic pump (10) of the type comprising a casing (11) for containing an impeller assembly (12), the casing (11) being closed at its ends by a cap (13) and by a pump body (14) for connection to a hydraulic system, respectively. The pump body (14) comprises a base (17) from which two mutually opposite flanges (18a, 18b) for fixing the pump to the hydraulic system project integrally with respect to the base (17). The box-shaped body (21) is arranged on the base (17) and internally forms two chambers (22, 23) which are isolated from each other and open upwards, a first chamber (22) for feeding fluid into the impeller assembly (12) and a second chamber (23) for collecting fluid arriving from the impeller assembly (12), respectively. The pump body (14) comprises two sleeves (29, 30), namely a first inlet sleeve (29) which protrudes from the first chamber (22) and is associated at one end with a first one (18a) of the flanges, and a second outlet sleeve (30) which protrudes from the second chamber (23) and is associated at one end with a second one (18b) of the flanges. The space formed by the profile of the base (17) and contained between the jacket (11) and the flanges (18a, 18b) and occupied by the sleeves (29, 30) opens upwards.

Description

Oil hydraulic pump

Technical field

The present invention relates to oil hydraulic pump, especially but not exclusively relate to multistage vertical solution press pump.

Background technique

The oil hydraulic pump of user's hydraulic system of known all size generally is made up of steel shell; Water intake and water outlet and impeller assembly (have one or more impellers; Depend on progression) the chamber be formed on this shell, motor is connected to shell and is arranged in the inboard or the outside of shell.

In general, the shell of vertical solution press pump is made up of the sheath body that comprises impeller assembly usually, and this sheath body is sealed with the pump housing that is used to be connected hydraulic system by top cover respectively at its two ends.

Import is formed on outlet and is connected on the pump housing, and functionally connects the import and the outlet of impeller assembly respectively.

In the various characteristics of pump, importantly stress the resistivity of each element to the corrosion that causes by water.

In addition, because sheath body, top cover and the pump housing must bear certain load, so they must be processed by the material with structural strength properties.

The material that had not only had the density of load but also had a corrosion resistance characteristic is a stainless steel.

In the pump element of citation, the pump housing is one of element that cost is played a decisive role most.

In fact the pump housing has complicated internal geometry; And must be through handling to guarantee on its some parts, a surface finishment being arranged; This surface finishment allows these parts and appropriate the cooperating of other elements, with the leakage of avoiding inexact hydraulic pressure to connect and produce thereupon.

In addition, one of element that the pump housing is still the heaviest is because it is also as the base of pump.

In order to attempt to reduce production costs, the pump housing of the pump of a lot of types is processed by cast iron, and cast iron is generally cheap many than stainless steel.

Self-evidently be, the corrosion of cast iron is necessarily many soon than stainless any corrosion of average quality, and said for this reason pump must be changed after certain hour.

In order to prolong the working life of pump with cast iron pump body, on the said pump housing, carry out preservative treatment, this has increased the overall cost of discharge pump, and aspect the durable time, in any case it can not guarantee to be equal to by the accessible performance of the stainless steel pump housing.

Summary of the invention

Target of the present invention provides a kind of oil hydraulic pump, and it has solved the problem of in the known type pump, showing.

In this target, an object of the present invention is to provide a kind of oil hydraulic pump, it has reduced stainless use with respect to the known type pump when guaranteeing aspect anticorrosion, to have similar performance with the known type pump.

Another object of the present invention provides a kind of oil hydraulic pump, and it is lower than the known type pump cost with identical antiseptic property.

Another object of the present invention provides a kind of oil hydraulic pump, and it has reduced the number of steps of on the pump housing, carrying out.

Another object of the present invention provides a kind of oil hydraulic pump, and it can be made by known system and technology.

This target and these are realized by a kind of oil hydraulic pump with other purposes (it will become clearer below); This kind oil hydraulic pump comprises the sheath body that is used to comprise impeller assembly; This sheath body is sealed with the pump housing that is used to be connected hydraulic system by top cover respectively in its end; It is characterized in that; The said pump housing comprises base; Two flanges respect to one another that are used for pump is fixed to hydraulic system integrally stretch out from said base with respect to said base, and box-like body is arranged in two chambers that are isolated from each other that form upward opening on the said base and in inside, and said two chambers that are isolated from each other are respectively first Room that is used for fluid is sent into impeller assembly and second Room that is used to collect the fluid that arrives from said impeller assembly; The said pump housing comprises the first import sleeve and the second outlet sleeve; The first import sleeve from said first Room stretch out and at one end with said flange first link, the second outlet sleeve from said second Room stretch out and at one end with said flange second link the formed space of the profile by the said base upward opening that is included between said sheath body and the said flange and is occupied by the said first import sleeve and the second outlet sleeve.

Description of drawings

Further characteristic of the present invention and advantage are from preferably but will become clearer not exclusive embodiment's the detailed description these embodiments illustrate with the mode of non-limitative example in the accompanying drawings in the face of two down, wherein:

Fig. 1 is the stereogram of pump in accordance with the present invention;

Fig. 2 is the exploded perspective view of the lower member of the pump of Fig. 1 among first embodiment;

Fig. 3 is the sectional view of lower member of the pump of Fig. 2,

Fig. 4 is the sectional view of the lower member of pump in accordance with the present invention among second embodiment.

Embodiment

With reference to accompanying drawing, what oil hydraulic pump according to the present invention was total is indicated by reference character 10.

Oil hydraulic pump 10 comprises the sheath body 11 that is used to comprise impeller assembly 12, and impeller assembly 12 schematically shows with dotted line in Fig. 3; In this embodiment, pump is that multistage vertical pump and impeller assembly are corresponding to multi-stage impeller.

Sheath body 11 (it has cylindrical outer shape), in its end respectively by

top cover

13 and 14 sealings of the pump housing that are used to be connected hydraulic system, as obviously visible in Fig. 2.

Top cover 13 be connected the pump housing 14 and connect by tension element 15 in a manner known way.

Motor 16 external stabilities to top cover 13 and its outer shaft pass top cover 13 to connect the impeller assembly 12 in the sheath body 11.

According to the present invention, connect the pump housing 14 and comprise base 17, two the flange 18a respect to one another and the 18b that are used for pump 10 is fixed to hydraulic system integrally stretch out from said base with respect to said base.

Especially,

flange

18a and 18b are made up of the circular portion respect to one another perpendicular to base 17;

Flange

18a and 18b are strengthened by corresponding lateral wings in pairs 19, and said lateral wings 19 reaches the outer peripheral portion of said flange in the side of base, defined the center compartment 20 of upward opening thus.

In the compartment 20 on base; Have the box-like body 21 that forms two chambers that are isolated from each other of upward opening in inside, said two chambers are respectively and are used for fluid is sent into first Room 22 of impeller assembly 12 and is used to collect second Room 23 from the fluid of said impeller assembly 12 arrival.

Especially; In this first embodiment; Box-like body 21 is made up of first cup shell 24 and second cup shell 27; Said first cup shell, 24 upward openings also laterally are provided with first hole 25 and second hole 26 on opposite side, said second cup shell 27 is arranged to its upward opening on the closed bottom of first cup shell 24 and also laterally is provided with the 3rd hole of aiming at first hole 25 28; Said two cup shells all have columniform substantially profile.

Space between the sidewall of first cup shell 24 and second cup shell 27 forms second Room, and the space in second cup shell 27 forms first Room 22.

The pump housing 14 comprises two

sleeves

29 and 30, and it constitutes the import and the outlet of pump.

Especially, the 3rd hole 28 of second cup shell 27 is arranged and is connected in its end in first in the sleeve 29 (being relevant to the import of pump) first hole 25 of passing first cup shell 24; First sleeve is arranged in the end in 22 outsides, first Room and first 18a of flange links.

Likewise, second sleeve 30 at one end is connected to second hole 25, and the opposite end that is positioned at 22 outsides, second Room at one end links with the second flange 18b.

Sheath body 11 surrounds first cup shell 24 (and surrounding whole box-like body thus) in this first embodiment, said first cup shell 24 is inserted in the sheath body 11.

In practice, sheath body 11 is as the structure locking device of first cup shell 24.

Therefore, the hole 31 that two alignings is set in sheath body 11 22 and 23 is withdrawn into flange 18 to allow

sleeve

29 and 30 from the chamber.

Be used on sheath body 11, providing the circular groove 32 of the packing ring 33 of sealing to be arranged on the outside and the upward opening of first cup shell, 24 walls.

The space upward opening that is included between sheath body 11 and the flange 18 and is formed by the profile that

sleeve

29 and 30 occupies by base 17; In practice, in the pump using process, can see

sleeve

29 and 30 from the top.

This structure aspects of base 17 is extremely important, because it has greatly simplified geometrical shape, has caused in practice only forming vertical incision at the center hole 34 and bolt hole 35 places of flange 18, and has made low production cost thus.

The respective seat 36 that is used on corresponding

sleeve

29 and 30 outer surface, forming the additional packing ring 37 that seals is arranged on the inwall in first hole 25, second hole 26 and the 3rd hole 28.

About first and

second holes

25 and 26, each seat 36 is defined with against the additional packing ring 37 of shoulder 38 lockings by shoulder 38 and ring 39 side direction.

Sleeve

29 or 30 is formed by cylindrical tubular part 42, this tubular portion insert the

respective aperture

25,26 that is used for

inlet chamber

22 and 23 and 28 and the respective central holes 34 of flange 18).

Especially, each sleeve has wide portions 43 in the end that links with respective flanges 18, and its diameter is greater than the diameter of the cylindrical tubular part 42 that forms the annular abutment structure that contacts with flange.

" modularization " structure of the pump housing 14 allows to optimize the use of material.

Thereby select material to make box-like body 21 withstand corrosion.

The material of processing first cup shell 24 and second body 27 is preferably plastic materials and/or stainless steel.

Sleeve

29 and 30 is preferably processed by stainless steel.

Base 17 is preferably processed by cast iron.

These material chosen allow in restricting cost, to optimize pump performance.

In a second embodiment; It is shown in the sectional view of Fig. 4 and is indicated by reference character 110; Box-like body 121 also is made up of first cup shell 124 and second cup shell 127; Said first cup shell 124 laterally is provided with first hole 125 and second hole 126 on opposite sides to each other, said second cup shell 127 is arranged in first cup shell 124 and laterally is provided with the 3rd hole of aiming at first hole 125 128; Said two

cup shells

124 and 127 all have columniform substantially profile.

The particularity of the second embodiment of the present invention 110 is that second cup shell 127 is stretched out from the bottom 144 of first cup shell 124 and becomes an integral body with it.

First center hole that first sleeve 129 is arranged through the first flange 118a gets into first hole 125 up to it, gets into second hole 126 and second sleeve 130 is arranged through second center hole of the second flange 118b up to it.

First hole 125 of first cup shell 124 is connected by tubular portion 145 with the 3rd hole 128 of second cup-like portion 127, and this tubular portion 145 also becomes an integral body with first cup shell 124 and second cup shell 127.

First cup shell 124 and from its second cup shell 127 of integrally stretching out for roughly concentric.

In the second embodiment of the present invention, be included in the formed space of the profile by base 117 upward opening that is passed by

sleeve

129 and 130 between box-like body 121 and flange 118a and the 118b.

The lower edge 111a of sheath body 111 is fixed to lean against on the corresponding shoulder 146, and said shoulder 146 is formed on the upper-part of facing of first cup shell 124.

The outside that is used on sheath body 111, providing the circular groove 132 of the packing ring 133 of sealing to be arranged on first cup shell, 124 walls is used to support and the fixing shoulder 146 of the lower edge 111a of sheath body 111, and upward opening.

The ring-type element 147 that is used for supporting component 112 is arranged on second cup shell, 127 tops.

Be used on the outer surface of

relevant sleeve

129 and 130, forming 137 corresponding 136 inwalls that are arranged on first hole 125 and second hole 126 of additional packing ring of sealing.

Box-like body 121 is processed by resistant material.

Especially, box-like body 121 is processed by plastic materials or stainless steel or other types Sihe equivalent material.

Find the problem of mentioning in the known types of hydraulic pump that the invention solves of so description in practice; Especially, the invention provides a kind of oil hydraulic pump, even if its permission uses stainless steel also to have HQ high quality " corrosion-resistant " performance limitedly.

In fact can through making base 17 be provided cylinder iron according to the geometrical shape of limited complexity (especially, very limited incision amount), it has guaranteed the stability of pump, and can box-like body 21 be provided individually through more cheap production method.

Box-like body 21 is processed by resistant material, for example plastic materials or stainless steel (but can use the other materials with decay resistance).

The simple geometric shape of box-like body element makes their overall manufacturing with low cost.

Advantageously; The import of pump is made up of

sleeve

29 and 30 with outlet; It is preferably processed by stainless steel and has a simple geometric shape, and therefore annular abutment structure wherein can be made cheaply, and guarantee with pump the surface finishment of the pipeline proper fit that will be connected.

In this way, through using cheap material and cancelling surface finishment processing, guarantee the HQ high quality corrosion resistance characteristic and reduced the manufacture cost of pump.

And simultaneously, the overall weight of pump is owing to the introducing of the plastic components that replaces stainless steel or cast iron member reduces.

And this structure of pump allows to select the most suitable by the material of pumping liquid type and particular job needs (stainless steel, cast iron, plastics and other), so has improved design flexibility.

A very important aspect that causes from the special module structure of pump is that the artificer can be through selecting element form pump according to the needs of corrosion resistance, structural strength and low-cost performance.

Corrosion resistance can also be used but the element that can make cheaply,,, just them can be easily changed in case their cycle in working life stops because consider the modularity of pump structure with traditional type.

So the present invention of design allows multiple modification and change, and all these is within the scope of the appended claims; All parts can further be replaced by the other technologies equivalent element.

In practice, material that is adopted (as long as they can adapt to concrete application) and size can be as requested any material and the size with the existing technology state.

The application requires the disclosures in italian patent application No.PD2006A000449 of preference and No.PD2007A000295 to incorporate this paper by reference into.

The technical characteristics of mentioning in wherein any claim is with reference character; These reference characters only in order to understand claim better by being comprised, so these reference characters are not to having any restriction by these reference characters with the explanation of each element of way of example sign.

Claims

1. an oil hydraulic pump (10); This kind oil hydraulic pump comprises the sheath body (11) that is used to comprise impeller assembly (12); Said sheath body (11) is sealed with the pump housing that is used to be connected hydraulic system (14) by top cover (13) respectively in its end; It is characterized in that; The said pump housing (14) comprises base (17); Be used for said pump is fixed to two flange (18a respect to one another of said hydraulic system; 18b) integrally stretch out from said base (17) with respect to said base (17), box-like body (21) is arranged in said base (17) two chambers that are isolated from each other (22,23) last and the formation upward opening in inside; Said two chambers that are isolated from each other are respectively and are used for fluid is sent into first Room (22) of said impeller assembly (12) and is used for second Room (23) of collection from the fluid of said impeller assembly (12) arrival; The said pump housing (14) comprise the first import sleeve (29) and second the outlet sleeve (30), the first import sleeve (29) from said first Room (22) stretch out and at one end with said flange (18a, 18b) first flange (18a) link, second the outlet sleeve (30) from said second Room (23) stretch out and at one end with said flange (18a, 18b) second flange (18b) link; Be included in said sheath body (11) and said flange (18a, 18b) between and by said first import sleeve (29) and said second the formed space of the profile upward opening that occupies of outlet sleeve (30) by said base (17).

2. oil hydraulic pump as claimed in claim 1; It is characterized in that; Said box-like body (21) is made up of first cup shell (24) and second cup shell (27); Said first cup shell (24) upward opening also laterally is provided with first hole (25) and second hole (26) on opposite sides to each other; Said second cup shell (27) is arranged on the closed bottom of said first cup shell (24) upward opening and laterally is provided with the 3rd hole of aiming at said first hole (25) (28); Space between the sidewall of said first cup shell (24) and said second cup shell (27) forms said second Room (23); And the space in said second cup shell (27) forms said first Room (22), and the said first import sleeve (29) passes said first hole (25) layout and connects said the 3rd hole (28) in its end, and the said second outlet sleeve (30) connects said second hole (26) in the end.

3. oil hydraulic pump as claimed in claim 2 is characterized in that, said sheath body (11) surrounds said box-like body (21), and said first import sleeve (29) and the said second outlet sleeve (30) are stretched out from said sheath body (11) by hole respect to one another (31).

4. oil hydraulic pump as claimed in claim 2 is characterized in that, is used for going up the outside and the upward opening that the circular groove (32) that forms the packing ring (33) that seals is arranged on said first cup shell (24) wall at said sheath body (11).

5. oil hydraulic pump as claimed in claim 2; It is characterized in that the respective seat (36) that is used for the additional packing ring (37) of formation sealing on the outer surface of the said first import sleeve (29) and the second outlet sleeve (30) is arranged on the inwall in said first hole (25), said second hole (26) and said the 3rd hole (28).

6. oil hydraulic pump as claimed in claim 5 is characterized in that, the said seat (36) that is relevant to said first hole (25) and said second hole (26) is defined to lock said additional packing ring (37) against said shoulder (38) by shoulder (38) and ring (39) side direction.

7. like each described oil hydraulic pump among the claim 2-6, it is characterized in that said flange (18a; 18b) be made up of the circular portion respect to one another perpendicular to said base (17), (18a 18b) is strengthened by corresponding pairs lateral wings (19) said flange; Said lateral wings (19) reaches said flange (18a in the side of said base (17); Outer peripheral portion 18b) has defined the center compartment (20) of upward opening, and said box-like body (21) is arranged in the said center compartment (20).

8. oil hydraulic pump as claimed in claim 5; It is characterized in that; Said first import sleeve (29) and the said second outlet sleeve (30) by cylindrical tubular part (42) and with corresponding said flange (18a; The end that 18b) links forms; Said cylindrical tubular part (42) is inserted and is used for getting into corresponding said first hole (25), said second hole (26) and said the 3rd hole (28) of said first Room (22) and second Room (23) and the respective central holes (34) of said flange (18a, 18b); The said end that links with corresponding said flange has diameter greater than said cylindrical tubular part (42) and formation and corresponding said flange (18a, the part (43) of the annular abutment structure of outside contact 18b).

9. oil hydraulic pump as claimed in claim 2 is characterized in that, said box-like body (21) is processed by resistant material.

10. oil hydraulic pump as claimed in claim 2 is characterized in that, said first cup shell (24) and said second cup shell (27) are processed by plastic materials and/or stainless steel.

11. oil hydraulic pump as claimed in claim 2 is characterized in that, said first import sleeve (29) and the said second outlet sleeve (30) are processed by stainless steel.

12. oil hydraulic pump as claimed in claim 1; It is characterized in that; Said box-like body (121) is made up of first cup shell (124) and second cup shell (127); Said first cup shell (124) laterally is provided with first hole (125) and second hole (126) on opposite sides to each other; Said second cup shell (125) is positioned at said first cup shell (124) and laterally is provided with the 3rd hole of aiming at said first hole (125) (128), and said second cup shell (127) is stretched out from the bottom (144) of said first cup shell (124) and become an integral body with it.

13. oil hydraulic pump as claimed in claim 12; It is characterized in that; First center hole that the said first import sleeve (129) is arranged through said first flange (118a) gets into said first hole (125) up to it, and second center hole that the said second outlet sleeve (130) is arranged through said second flange (118b) gets into said second hole (126) up to it.

14. oil hydraulic pump as claimed in claim 13; It is characterized in that; Said first hole (125) of said first cup shell (124) is connected by tubular portion (145) with said the 3rd hole (128) of said second cup shell (127), and said tubular portion also becomes an integral body with said first cup shell (124) and said second cup shell (127).

15. oil hydraulic pump as claimed in claim 14 is characterized in that, said first cup shell (124) and from its said second cup shell (127) of integrally stretching out for roughly concentric.

16. oil hydraulic pump as claimed in claim 15; It is characterized in that; Be included in said box-like body (121) and said flange (118a, 118b) between by said first import sleeve (29) and said second the formed space of the profile upward opening that passes of outlet sleeve (30) by said base (117).

17. oil hydraulic pump as claimed in claim 16 is characterized in that, the lower edge (111a) of said sheath body (111) is fixed to and leans against on the corresponding shoulder (146), and said shoulder (146) is formed on the upper-part of facing of said first cup shell (124).

18. oil hydraulic pump as claimed in claim 17; It is characterized in that; The outside at said first cup shell (124) wall; Be used for supporting and fixing the said shoulder (146) of the lower edge (111a) of said sheath body (111), have the circular groove (132) that is used for going up the upward opening of the packing ring (133) that forms sealing at said sheath body (111).

19. oil hydraulic pump as claimed in claim 18 is characterized in that, the ring-type element (147) that is used to support said impeller assembly (112) is arranged on said second cup shell (127) top.

20. oil hydraulic pump as claimed in claim 19; It is characterized in that having the corresponding seat (136) that is used on the outer surface of corresponding said first import sleeve (29) and the said second outlet sleeve (30), forming the additional packing ring (137) of sealing on the inwall in said first hole (125) and said second hole (126).

21. oil hydraulic pump as claimed in claim 12 is characterized in that, said box-like body (121) is processed by resistant material.

22. oil hydraulic pump as claimed in claim 12 is characterized in that, said box-like body (121) is processed by plastic materials or stainless steel.

23. oil hydraulic pump as claimed in claim 12 is characterized in that, said base (17,117) is processed by cast iron.