CN203756518U - Helical planetary gear pump - Google Patents
Helical planetary gear pump Download PDFInfo
- Publication number
- CN203756518U CN203756518U CN201420181162.5U CN201420181162U CN203756518U CN 203756518 U CN203756518 U CN 203756518U CN 201420181162 U CN201420181162 U CN 201420181162U CN 203756518 U CN203756518 U CN 203756518U
- Authority
- CN
- China
- Prior art keywords
- gear
- oil
- central gear
- pump
- pump body
- 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.)
- Expired - Fee Related
Links
Abstract
The utility model relates to a helical planetary gear pump which comprises a central gear, a plurality of planetary gears, an inner pump body, an outer pump body, an input shaft, a locating sleeve, sliding bearings and O-shaped rings, wherein the central gear and the planetary gears are respectively provided with a fixed axis; the central gear is driven by the input shaft and is supported on the inner pump body by the locating sleeve; the planetary gears are supported on the inner pump body by the sliding bearings; a plurality of independent input/output (I/O) oil cavities are formed by the central gear and the planetary gears, the inner wall of the inner pump body and the sides of the sliding bearings at two sides; all oil absorption cavities in the inner pump body are communicated with an oil absorption hole in the outer pump body, and all oil discharge cavities in the inner pump body are communicated with an oil discharge hole in the outer pump body. The helical planetary gear pump has the advantages that the radial force of the gears is basically cancelled out, so that assembling gaps can be maintained, the stress of the gears and the bearings is greatly lightened, the abrasion is reduced, and the service life of the gear pump is prolonged. Furthermore, the oil absorption cavities and the oil discharge cavities are increased, so that the displacement of the gear pump is increased in multiples.
Description
Technical field
The utility model relates to the gear pump in a kind of hydraulic system, relate to specifically for the repairing as various engineering goods hydraulic systems, lubrication, control oil sources etc., be particularly useful for the helical teeth planetary gear pump in oil-way system that the large discharge capacity fluid of needs carries.
Background technique
In various types of volumetric oil pumps, that gear pump has is simple in structure, easy to manufacture, cost is low, lightweight, reliable operation and to advantages such as oil contamination are not too responsive, applies very extensive.But general spurgear pump, owing to there is radially imbalance problem, causes bearing and gear wear serious, and fit up gap is strengthened gradually, reveal serious, the shortcoming such as volumetric efficiency is low, and the life-span is low, noise is large.And existing straight-tooth planetary gear pump, entrap phenomenon can not be well solved, and noise is also larger.Along with the fast development of China's economy, the progressively lifting of technology, also more and more higher to the performance requirement of product, energy-efficient low noise becomes the developing direction of product, and therefore high-end engineering goods are in the urgent need to a kind of large discharge capacity, low noise, high performance gear pump.
Summary of the invention
A kind of helical teeth planetary gear pump that especially needs the oil-way system of large discharge capacity fluid conveying for various engineering goods that the purpose of this utility model provides for existing deficiency in above-mentioned prior art just.
The purpose of this utility model can realize by following technique measures:
Helical teeth planetary gear pump of the present utility model comprises the inside and outside pump housing being set in together by close fit mode, the central gear and at least two planet wheels that arrange around central gear that are helical gear and arrange in dead axle mode, described central gear is driven by input shaft, and this input shaft is supported on inner pump by being positioned at central gear setting sleeve I and the central gear setting sleeve II at two ends; Described planet wheel two ends are arranged in inner pump by sliding bearing and sliding bearing overcoat I, sliding bearing overcoat II respectively; Between described central gear and planet wheel, inner pump inwall, form respectively several separate oil sucting cavities and oil-discharging cavity, and each oil sucting cavity communicates with the inlet port on the outer pump housing, each oil-discharging cavity communicates with the oil drain out on the outer pump housing.
Described in the utility model, on sliding bearing, have the oilhole that bearing lubrication is used, this oilhole communicates with the oil-discharging cavity (hyperbaric chamber) of gear pump; Between the described inside and outside pump housing, add the O type circle of sealing use.
Central gear described in the utility model and planet wheel are the low pitch angle helical gear of swing angle 4～5 o, and have done mending teeth of gear design, the little bottom clearance design that it is 0.13mm～0.15mm that central gear adopts bottom clearance.
In the utility model gear pump, if the central gear number of teeth is the integral multiple of planet wheel number, radial force can be offset completely, if not integral multiple, radial force also can be fallen by basic neutralisation, has improved the stress of gear and bearing, reduce wearing and tearing, improved the life-span; Total contact ratio to helical gear reasonably designs, and central gear adopts little bottom clearance design, has effectively improved entrap phenomenon, has reduced flow pulsation, has reduced noise; Gear adopts low pitch angle design, therefore the axial force that engagement produces is smaller, central gear two end positioning and planet wheel two ends sliding bearing overcoat all adopt special high-abrasive material, central gear and planet wheel adopt carburizing and quenching technique, hardness is higher, therefore axially wearing and tearing are very little, but transmission stability is better than straight-tooth, and bearing capacity is also improved; On sliding bearing, have the oilhole for bearing lubrication communicating with hyperbaric chamber, further improved bearing life.On inner pump, every a pair of gear engagement both sides have a filler opening, an oil drain out, and the outer pump housing is merged into a filler opening by all filler openings, and all oil drain outs are merged into an oil drain out.Inner pump, the outer pump housing all utilize three-dimensional solid modeling, and by CAE optimal design, rational in infrastructure.
The beneficial effects of the utility model are as follows:
The utility model has the advantage of that gear pump radial force cancels each other substantially, improved the stress of gear and bearing, reduced wearing and tearing, improved the life-span.Total contact ratio to helical gear reasonably designs, and central gear adopts mending teeth of gear to add little bottom clearance design, has effectively improved entrap phenomenon, has reduced flow pulsation, has reduced noise.Gear adopts low pitch angle design, therefore the axial force that engagement produces is smaller, central gear two end positioning and planet wheel two ends sliding bearing overcoat all adopt special high-abrasive material, central gear and planet wheel adopt carburizing and quenching technique, hardness is higher, therefore axially wearing and tearing are very little, but transmission stability is better than straight-tooth, and bearing capacity is also improved.Simultaneously owing to having increased the quantity of entering discharge opeing oil pocket, the lifting of several times gear pump delivery.Be a kind of large discharge capacity, low noise, high performance gear pump, and can do vertical according to use occasion.
Accompanying drawing explanation
Fig. 1 is the plan view of the utility model helical teeth planetary gear pump.
Fig. 2 is A-A sectional view in Fig. 1.
Fig. 3 is sliding bearing view in Fig. 1.
Fig. 4 is the side view of Fig. 3.
Sequence number in Fig. 1～Fig. 4: 1 inlet port, the 2 outer pump housings, 3 O type circles, 4 inner pumps, 5 sliding bearing overcoat I, 6 sliding bearings, 7 planet wheels, 8 input shafts, 9 central gear setting sleeve I, 10 central gears, 11 oil drain outs, 12 central gear setting sleeve II, 13 sliding bearing overcoat II, 14 oil-discharging cavities, 15 oil sucting cavities, 16 oilholes.
Embodiment
The utility model is described in further details below in conjunction with embodiment's (accompanying drawing):
As shown in Figure 1, 2, the symmetrical helical teeth planetary gear pump of the utility model pump comprises the inside and outside pump housing 4,2 being set in together by close fit mode, the central gear 10 and at least two planet wheels 7 that arrange around central gear that are helical gear and arrange in dead axle mode, described central gear 10 is driven by input shaft 8, and this input shaft 8 is supported on inner pump 4 by being positioned at central gear setting sleeve I 9 and the central gear setting sleeve II 12 at two ends; Described planet wheel 7 two ends are arranged in inner pump 4 by sliding bearing 6 and sliding bearing overcoat I 5, sliding bearing overcoat II 13 respectively; Between described central gear 10 and planet wheel 7, inner pump 4 inwalls, form respectively several separate oil sucting cavities 15 and oil-discharging cavity 14, and each oil sucting cavity 15 communicates with the inlet port 1 on the outer pump housing, each oil-discharging cavity 14 communicates with the oil drain out 11 on the outer pump housing.
On sliding bearing described in the utility model 6, have the oilhole 16 that bearing lubrication is used, the oil-discharging cavity 14(hyperbaric chamber of this oilhole and gear pump) communicate; Between the described inside and outside pump housing, add the O type circle 3 of sealing use.
Central gear described in the utility model and planet wheel are the low pitch angle helical gear of swing angle 4～5 o, and have done mending teeth of gear design, and central gear adopts bottom clearance to be about the little bottom clearance design of 0.14mm.
Working principle of the present utility model is as follows:
Input shaft 8 drives central gear 10 rotations, central gear 10 meshes with several planet wheels 7 simultaneously, the gear teeth are thrown off survey seal operation volume and are increased, form parital vacuum, in fuel tank, fluid is under the atmospheric effect in the external world, inlet port 1 through the outer pump housing enters in each oil sucting cavity 15 of inner pump, simultaneously, the opposite side gear teeth enter engagement, seal operation volume reduces gradually, fluid between cog is extruded, from the oil-discharging cavity 14 of inner pump converges to, the oil drain out 11 of the pump housing is transported in oil-way system, input shaft 8 drives central gear 10 continuous rotations, helical teeth planetary gear pump has just completed the process of continuous oil suction and force feed.
Claims (4)
1. a helical teeth planetary gear pump, it is characterized in that: comprise the inside and outside pump housing (4,2) being set in together by close fit mode, be helical gear a central gear (10) of arranging in dead axle mode and at least two planet wheels (7) that arrange around central gear, described central gear (10) is driven by input shaft (8), and this input shaft is supported on inner pump (4) by being positioned at central gear setting sleeve I (9) and the central gear setting sleeve II (12) at two ends; Described planet wheel (7) two ends are arranged in inner pump (4) by sliding bearing (6) and sliding bearing overcoat I (5), sliding bearing overcoat II (13) respectively; Between described central gear (10) and planet wheel (7), inner pump (4) inwall, form respectively several separate oil sucting cavities (15) and oil-discharging cavity (14), and each oil sucting cavity (15) communicates with the inlet port (1) on the outer pump housing, each oil-discharging cavity (14) communicates with the oil drain out (11) on the outer pump housing.
2. helical teeth planetary gear pump according to claim 1, is characterized in that: on described sliding bearing (6), have the oilhole (16) that bearing lubrication is used, this oilhole communicates with the oil-discharging cavity (14) of gear pump.
3. helical teeth planetary gear pump according to claim 1, is characterized in that: the O type circle (3) that adds sealing use between the described inside and outside pump housing.
4. helical teeth planetary gear pump according to claim 1, it is characterized in that: central gear and planet wheel are the low pitch angle helical gear of swing angle 4～5 o, and done mending teeth of gear design, the little bottom clearance design that it is 0.13mm～0.15mm that central gear adopts bottom clearance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420181162.5U CN203756518U (en) | 2014-04-15 | 2014-04-15 | Helical planetary gear pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420181162.5U CN203756518U (en) | 2014-04-15 | 2014-04-15 | Helical planetary gear pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203756518U true CN203756518U (en) | 2014-08-06 |
Family
ID=51251800
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420181162.5U Expired - Fee Related CN203756518U (en) | 2014-04-15 | 2014-04-15 | Helical planetary gear pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203756518U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103867434A (en) * | 2014-04-15 | 2014-06-18 | 郑州机械研究所 | Planetary helical gear pump |
-
2014
- 2014-04-15 CN CN201420181162.5U patent/CN203756518U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103867434A (en) * | 2014-04-15 | 2014-06-18 | 郑州机械研究所 | Planetary helical gear pump |
| CN103867434B (en) * | 2014-04-15 | 2016-04-06 | 郑州机械研究所 | Helical teeth planetary gear pump |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203189267U (en) | Conjugated internal-external cycloid involute-type rotor of roots vacuum pump | |
| CN201627714U (en) | Gear pump with novel annular gear | |
| CN103291609A (en) | Biaxial harmonic gear pump | |
| CN203756518U (en) | Helical planetary gear pump | |
| CN203532246U (en) | High-low pressure duplicate gear pump | |
| CN201827069U (en) | Balanced type internal-gearing gear pump | |
| CN205330964U (en) | Oil pump gear of making an uproar falls | |
| CN108278186A (en) | A kind of two-dimentional plunger hydraulic pamp of water-oil separating formula space cam transmission | |
| CN101984257A (en) | Balanced type crescent seal gear pump | |
| CN103867434B (en) | Helical teeth planetary gear pump | |
| CN207598490U (en) | A kind of hydraulic pressure crescent gear pump | |
| CN201606243U (en) | Novel high-pressure gear pump | |
| CN104728416A (en) | Dual clutch transmission with improved oil pump arrangement structure | |
| CN100572813C (en) | Pin-hole type cycloid rotor pump | |
| CN201991767U (en) | Gear pump for feeding | |
| CN204299866U (en) | Cantilever type lubrication three screw pump | |
| CN204921279U (en) | A axial plunger pump that is used for railway hydraulic pressure to remove | |
| CN100520067C (en) | Rotor pump with double pendulum lines | |
| CN201228635Y (en) | Low-pressure high flow rate composite gear pump | |
| CN100357605C (en) | Cycloidal pin gear hydraulic pump | |
| CN202833121U (en) | Circular gear pump | |
| CN203308703U (en) | Synchronous three-parallel inside engaged gear pump | |
| CN207145223U (en) | A kind of small impact gear-type oil pump | |
| CN207364244U (en) | A kind of power takeoff being lubricated using helicoidal pump, gearbox or Retarder | |
| CN202597090U (en) | Multi-gear cosine gear pump |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140806 Termination date: 20170415 |