• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A gear pump of the externally- meshing type has the housing inner peripheral walls coated with a bearing material (36) on which the tips of the pumping gear-wheels (18, 20) slide. Preferably, the bearing material is cadmium and each coating is 0.1 to 0 &cirf& 4 mm thick and subtends an angle of about 240 DEG at the axis of the respective gear-wheel. The coatings may extend axially beyond the gear- wheels so as to be contiguous with bearing bushes for the gear-wheel shafts, Fig. 2 (not shown). <IMAGE>
    公开号:SU1039450A3
    申请号:SU813306100
    申请日:1981-07-10
    公开日:1983-08-30
    发明作者:Шаих Мартин
    申请人:Мааг-Цанрэдер Унд-Машинен Аг (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to a machine-building, in particular to gear pumps. Gear pumps are known that contain two external gears with pins mounted in sliding bearings, housed in the bores of the housing, and sealing rings with a width equal to the width of the gears, coupled with gears and bores of the housing ij. A disadvantage of gear pumps is the flow of working fluid between the mating surfaces of the sealing rings and the surfaces of the housing bores. Closest to the proposed technical entity is a gear pump that contains two external gears with pins mounted in sliding bearings placed in body bores, the inner surface of which has an anti-friction metal coating in the area of gear coupling, and the gears are hermetic are coupled along the outer diameter-C surfaces of the body bores located between the inlet and outlet cavities, and along the end surface of the body with the end surfaces of the bearings slip 2. However, such a gear pump is characterized by insufficient tightness. The purpose of the invention is to improve the tightness. This goal is achieved by the fact that in a gear pump containing two external gears with pivot pins mounted in slide bearings placed in housing sections, the inner surface of which has an anti-friction metallic coating in the area of gear coupling. The sheterni are hermetically matched in outer diameter with the surfaces of the casing bores located between the inlet and outlet cavities, and at the ends of the surfaces with the end surfaces and slip bearings, surface of body bores in the area of their mating with bearings v. The slip is equipped with an anti-friction metal coating, and cadmium with a purity of at least 98% is used as an anti-friction metal coating. The thickness of the cadmium layer is 0.1-0.4 mm. Figure 1 shows the gear pump, a cross-section; FIG. 2 shows a gear pump, section A-A in FIG. The gear pump contains two gears 1 and 2 of external gearing with trunnions 3 mounted in sliding bearings 4, housed in bores 5 and b of housing 1, the inner surface 8 and 9 of which have an anti-friction metallic coating 10 in the area of conjugation with gears 1 and 2 The gears 1 and 2 are hermetically matched in outer diameter with surfaces 8 and 9 of bores 5 and b of housing 1 located between the cavities of inlet 11 and outlet 12, and along end surfaces of surface 13 - with end surfaces of bearings 14 4 slides, with surface 8 and 9 bores 5 and b of housing 1 in the area of their mating with slide bearings 4 are provided with an anti-friction metal coating 15, and cadmium with a purity of at least 98% and a thickness of 0 to 1-0.4 mm was used as an anti-friction metal coating. . Gear pump works as follows. When the gears 1 and 2 rotate, the working fluid is captured by the teeth of gears 1 and 2 and transferred to the outlet cavity 12. At the same time sopr; gears 1 and 2 with an anti-friction metal coating 10 along a sliding arrangement provides minimal friction and minimum flow of working fluid, and the installation of sliding bearings 4 in bores 3 of the housing 7 equipped with an anti-friction metal coating 15, which is not cleaned with cadmium less than 98% with a layer thickness of 0.1-0.4 mm, for easy-press fit, eliminates peretechki on the interface surfaces of bearings 4 slide with surfaces 8 and 9 bores 5 and 6 of the housing 7. Tehniko-economic effect CPC is to increase tightness, which leads to higher volumetric efficiencies sivity.
    ftf
    权利要求:
    Claims (2)
    [1]
    -1. A GEAR PUMP containing two gears of an external hook, gears with trunnions installed · in plain bearings, housed in the bores of the housing, internal. the surface of which in the area of mating with the gears has an antifriction metal coating, the gears being hermetically mated along the outer diameter with the surfaces of the housing bores located between the inlet and outlet cavities, and along the end surfaces with the end surfaces of the sliding bearings, etc. ich. The fact is that, in order to increase the tightness of the surface ·, the surface of the housing bores in the area of their interface with the plain bearings is provided with an antifriction metal coating, and cadmium with a purity of at least 98% is used as an antifriction metal coating.
    [2]
    2 ‘. The pump according to claim 1, about t and h a rain and th so that the thickness of the cadmium layer is 0.1-0.4 mm
    >
    类似技术:
    公开号 | 公开日 | 专利标题
    US3881849A|1975-05-06|Gear pumps
    US4674960A|1987-06-23|Sealed rotary compressor
    CA1046343A|1979-01-16|Gear pump
    SU1039450A3|1983-08-30|Gear pump
    US4395207A|1983-07-26|Gear pump or motor with bearing passage for shaft lubrication
    US3690793A|1972-09-12|Gear pump with lubricating means
    EP2610493B1|2020-01-01|Stator seal structure for single-shaft eccentric screw pump
    WO2016026556A1|2016-02-25|Vacuum pump with eccentrically driven vane |
    US4337018A|1982-06-29|Rotary impeller pump or motor with counterbalancing chamber in thrust plate bearing counterbore
    US6250900B1|2001-06-26|Positive displacement hydraulic unit with near-zero side clearance
    US4511316A|1985-04-16|Positive displacement pumps
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    US6695604B1|2004-02-24|Automotive fuel pump gear assembly having lifting and lubricating features
    GB2140102A|1984-11-21|Improvements in shaft seals
    US3544244A|1970-12-01|Gear pump
    RU162576U1|2016-06-20|GEAR PUMP
    US9360009B2|2016-06-07|Multi-channel, rotary, progressing cavity pump with multi-lobe inlet and outlet ports
    JPH10131870A|1998-05-19|Gear pump
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    EP3521621B1|2021-04-21|Internally rotating gear pump
    US3960469A|1976-06-01|Reversible pump
    JP2538658Y2|1997-06-18|Gear pump
    同族专利:
    公开号 | 公开日
    CH647048A5|1984-12-28|
    FR2486595A1|1982-01-15|
    IT8122829D0|1981-07-09|
    JPS5751985A|1982-03-27|
    GB2080424A|1982-02-03|
    IT1137694B|1986-09-10|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    EP0180788A1|1984-10-08|1986-05-14|Shimadzu Corporation|Gear pump or motor|
    DE19735245C2|1997-08-14|1999-12-09|Bosch Gmbh Robert|Gear machine|
    DE19845383C2|1998-10-02|2000-10-12|Bosch Gmbh Robert|Hydraulic gear pump|
    DE102009028148A1|2009-07-31|2011-02-03|Robert Bosch Gmbh|gear pump|
    CN103603801A|2013-12-06|2014-02-26|湖南南方宇航高精传动有限公司|Box gear pump|
    DE102015221338A1|2015-10-30|2017-05-04|Robert Bosch Gmbh|External gear pump for a waste heat recovery system|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    CH532480A|CH647048A5|1980-07-11|1980-07-11|GEAR PUMP.|
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