CN107448380A - A kind of gear pump - Google Patents
A kind of gear pump Download PDFInfo
- Publication number
- CN107448380A CN107448380A CN201710883049.XA CN201710883049A CN107448380A CN 107448380 A CN107448380 A CN 107448380A CN 201710883049 A CN201710883049 A CN 201710883049A CN 107448380 A CN107448380 A CN 107448380A
- Authority
- CN
- China
- Prior art keywords
- end cap
- gear
- pump housing
- pump
- assembly
- Prior art date
- 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.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2/00—Rotary-piston machines or pumps
- F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
- F04C2/14—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
Abstract
The present invention relates to a kind of gear pump, is particularly used for the gear pump for producing pressure as dynamical element in the hydraulic systems such as engineering machinery such as fork truck, loading machine, including：The pump housing；The pump body is provided with geared system, and the geared system includes driving gear and a driven gear driven by the driving tooth 2 is formed；The pump housing includes drive end bearing bracket, rear end cap and pump housing sub-assembly, and the drive end bearing bracket is concentric structure with rear end cap and pump housing sub-assembly.The present invention is simple in construction, effectively reduces " the sweeping thorax phenomenon " of gear pump.
Description
Technical field
The present invention relates to a kind of gear pump, is particularly used in the hydraulic systems such as engineering machinery such as fork truck, loading machine
The gear pump of pressure is produced as dynamical element.
Background technology
Usual engineering machinery (such as fork truck, loading machine, excavator etc.) is equipped with hydraulic system, and hydraulic system needs power
The kinetic force of element (common such as gear pump) engine is exported is converted to pressure potential, so as to pass through control device
(such as various pressure-control valves, directional control valve etc.) driving performs device (such as hydraulic jack, hydraulic motor etc.) acting.Tooth
Wheel pump advantage have simple and compact for structure, small volume, light weight, good manufacturability, cheap, self-suction it is strong, to oil contamination not
Sensitivity, the range of speeds are big, energy impact resistance loads, reliable operation；Gear pump shortcoming：Radial load is uneven, flowing pulsation is big, effect
Rate is low, can not do variable pump uses, noise and vibration the shortcomings that being it big, easy to wear.By engine driving, it can have gear pump
The pressure fluctuation and flowed fluctuation of the blocking upstream of effect, gear pump is strong except possessing suction capacity, and flow is unrelated with pressure release,
Without inlet valve and dump valve on its pump case, there is the advantages that simple in construction, uniform flow, reliable operation.For the above reasons,
Gear pump is increasingly used as pressure generator (dynamical element).Important research and development difficult point in this technical field is to carry
High volumetric efficiency and mechanical efficiency, work noise and temperature rise are reduced, reduce gear and the abrasion of pump housing inner chamber.
In existing gear pump structure, external structure generally comprises drive end bearing bracket, rear end cap and the part of the middle pump housing 3, internal
Each 1 comprising driving gear and driven gear, the two axial ends of two gears are all the seats with sliding bearing by (forward and backward) end cap
Hole is come what is supported, and with principal and subordinate's outside diameter of gear face of gear pump directly contact can not occur for cavity segment (for similar one in line pump body
Kind of small―gap suture suspended state, it is impossible to destroy lubricating oil film), but the end cap with two is the step bayonet socket by end cap with line pump
Intracoelomic cavity interference fits are fixed to realize the suspension of gear.
Due to processing the presence of cumulative errors, tend to cause the bore of gear pump rear and front end lid not coaxial, with pump
The mating part decentraction of intracoelomic cavity, direct result are exactly that region of engagement engagement is easily occurring for gear pump not just, the outside circle of gear
Scratched with pump housing inner chamber, that is, " the sweeping thorax phenomenon " being commonly called as.Gear has not only been worn in the generation of scratch, grinds substantial amounts of iron filings pollution
Hydraulic system, the volumetric efficiency for also resulting in gear pump decline, and noise and temperature rise increase, the mechanical efficiency of whole pump also decline.
It is therefore desirable to prior art is improved.
The content of the invention
In order to solve the above technical problems, the present invention provides, one kind is simple in construction, and effective reduction gear pump " sweeps thorax to show
As ".
The present invention realizes that the technical scheme of object above is：A kind of external structure is that 2 segmentation gear pumps (substitute original 3 sections
Formula external structure gear pump), external structure includes：The pump housing end cap assembly of structure is made of one with one end cap of any of which
(integrally casting shaping structure, hereinafter referred to as " pump housing end cap sub-assembly ") and another end cap, according to client's needs, before being
End cap makes pump housing end cap sub-assembly or rear end cap with the pump housing and makes pump housing end cap sub-assembly with the pump housing.
The pump body is provided with geared system, and the geared system includes driving gear and one by the driving gear
The driven gear of driving is formed；
The pump housing includes drive end bearing bracket/rear end cap and pump housing end cap sub-assembly, the drive end bearing bracket/rear end cap and pump housing end cap
Sub-assembly is concentric structure.
Further, the contact surface sealing of drive end bearing bracket/rear end cap and the pump housing end cap sub-assembly is fixed.
Further, drive end bearing bracket/rear end cap and the pump housing end cap sub-assembly is fixedly connected together by screw.
Further, sealing ring is provided between the contact surface of drive end bearing bracket/rear end cap and the pump housing end cap sub-assembly to realize
High pressure sealing.
Further, the driving gear and driven gear pass through the seat with oil-less self-lubricating bearing that coordinates with gear shaft
Hole is connected with the drive end bearing bracket/rear end cap and pump housing end cap sub-assembly, has pressure oil to flow through the axial direction for realizing gear shaft in bore
Autobalance adjusts.
Beneficial effects of the present invention are：
1) structure for being made of one the pump housing and one of end cap, simplifies the step of manufacturing procedure 2.3 segmentation knots originally
Structure Cutter Body Processing with Machining Center, needs to be loaded and could complete for 6 times altogether, now only needs that be loaded for 4 times can completion of processing.
2) sealing surface at one is reduced, due to the assembling unit structure being made of one using end cap with the pump housing, originally 3 segmentation structures
2 go out sealing surface and be reduced to sealing surface at 1, seal also less with one, reduces the link of leakage.
3) due to the assembling unit structure being made of one using one of end cap and the pump housing so that the inner chamber of the pump housing with wherein
The gear shaft bore of one end cap is the completion processing that is once loaded, and the concentricity and perpendicularity of the two are greatly improved,
Reduce the risk to scratch, just reduce the risk that hydraulic system is polluted by iron filings accordingly.
4) amount of labour is reduced, work efficiency is improved, reduces cost.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention, and Fig. 2 is Fig. 1 A-A profiles, wherein：
1st, the pump housing, 2, driving gear, 3, driven gear, 4, drive end bearing bracket, 5, rear end cap and pump housing sub-assembly.
Embodiment
The present invention is described further below by way of specific embodiment combination accompanying drawing.
As shown in Fig. 1~2, a kind of gear pump, including：The pump housing 1；
The pump housing 1 is internally provided with geared system, and the geared system includes driving gear 2 and one by the active
The driven gear 3 that gear 2 drives is formed；
The pump housing 1 includes drive end bearing bracket 4, rear end cap and pump housing sub-assembly 5, the drive end bearing bracket 4 and rear end cap and pump housing group
Component 5 is concentric structure.
The drive end bearing bracket 4 is fixed with the sealing of the contact surface of rear end cap and pump housing sub-assembly 5.
Together with the drive end bearing bracket 4 is fixedly connected with rear end cap and pump housing sub-assembly 5 by screw.
Sealing ring is provided between the drive end bearing bracket 4 and the contact surface of rear end cap and pump housing sub-assembly 5.
The driving gear 2 and driven gear 3 are solid by screw and the drive end bearing bracket 4 and rear end cap and pump housing sub-assembly 5
Fixed connection.
Rear end cap and the pump housing sub-assembly 5 is formed in one structure.
, can also be such a using rear end cap and the pump housing as overall integrated formed structure as the another way of the present invention
Structure is also within protection scope of the present invention.
Above-described embodiment is only intended to clearly illustrate example of the present invention, and is not the embodiment party to the present invention
The restriction of formula.For those of ordinary skill in the field, other differences can also be made on the basis of the above description
The change or variation of form.There is no necessity and possibility to exhaust all the enbodiments.And these belong to the essence of the present invention
Among the obvious changes or variations that god extends out is still in protection scope of the present invention.
Claims (7)
- A kind of 1. gear pump, it is characterised in that：Including：The pump housing (1)；The pump housing (1) is internally provided with geared system, and the geared system includes driving gear (2) and one by the driving tooth The driven gear (3) for taking turns (2) driving is formed；The pump housing (1) includes drive end bearing bracket (4), rear end cap and pump housing sub-assembly (5), the drive end bearing bracket (4) and rear end cap and pump Body sub-assembly (5) is concentric structure.
- A kind of 2. gear pump according to claim 1, it is characterised in that：The end cap (4) and another end cap and pump housing group The contact surface sealing of component (5) is fixed.
- A kind of 3. gear pump according to claim 2, it is characterised in that：The end cap (4) and another end cap and pump housing group Component (5) is fixedly connected together by screw.
- A kind of 4. gear pump according to claim 2, it is characterised in that：The end cap (4) and another end cap and pump housing group Sealing ring is provided between the contact surface of component (5).
- A kind of 5. gear pump according to claim 1, it is characterised in that：The driving gear (2) and driven gear (3) are logical Screw is crossed to be fixedly connected with the end cap (4) and another end cap and pump housing sub-assembly (5).
- A kind of 6. gear pump according to claim 1, it is characterised in that：Another end cap and pump housing sub-assembly (5) are Integrated formed structure.
- A kind of 7. gear pump according to claim 1, it is characterised in that：The end cap (4) and another end cap and pump housing group Component (5) all includes gear shaft bore.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710883049.XA CN107448380A (en) | 2017-09-26 | 2017-09-26 | A kind of gear pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710883049.XA CN107448380A (en) | 2017-09-26 | 2017-09-26 | A kind of gear pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107448380A true CN107448380A (en) | 2017-12-08 |
Family
ID=60498154
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710883049.XA Pending CN107448380A (en) | 2017-09-26 | 2017-09-26 | A kind of gear pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107448380A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1203885A2 (en) * | 2000-11-02 | 2002-05-08 | Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel Ltd.) | Gear pump |
| EP1371849A1 (en) * | 2002-06-14 | 2003-12-17 | Vivoil Oleodinamica Vivolo S.r.l. | Detachable heads for hydraulic pumps and motors |
| CN103629109A (en) * | 2012-08-24 | 2014-03-12 | 无锡市东方液压件制造有限公司 | Side plate axial clearance compensation gear oil pump |
| CN207621023U (en) * | 2017-09-26 | 2018-07-17 | 镇江沃尔夫重工部件有限公司 | A kind of gear pump |
-
2017
- 2017-09-26 CN CN201710883049.XA patent/CN107448380A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1203885A2 (en) * | 2000-11-02 | 2002-05-08 | Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel Ltd.) | Gear pump |
| EP1371849A1 (en) * | 2002-06-14 | 2003-12-17 | Vivoil Oleodinamica Vivolo S.r.l. | Detachable heads for hydraulic pumps and motors |
| CN103629109A (en) * | 2012-08-24 | 2014-03-12 | 无锡市东方液压件制造有限公司 | Side plate axial clearance compensation gear oil pump |
| CN207621023U (en) * | 2017-09-26 | 2018-07-17 | 镇江沃尔夫重工部件有限公司 | A kind of gear pump |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20171208 |