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Automatic partial pressure double gear pump

A duplex gear pump and gear pump technology, applied in the directions of rotary piston pump, rotary piston/swing piston pump combination, rotary piston/swing piston pump components, etc. Balance, cascade pump life reduction, easy damage and other problems, to achieve long service life, eliminate instantaneous pressure pulse, and close service life

Active Publication Date: 2017-08-29
GUIZHOU HONGLIN MACHINERY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the incomplete matching between the two-stage gear pumps, the flow difference between the two-stage pumps leads to unbalanced loads of the two-stage pumps, which easily causes instantaneous pressure pulses to increase and cause damage to the one-stage pump with a large load. , resulting in reduced lifetime of the entire cascade pump
In addition, at the initial stage of starting, the two-stage gear pumps rotate at the same time; at this time, the oil pressure relationship between the two-stage gear pumps has not been established, so the gears of the second-stage pump are dry friction and easy to damage

Method used

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  • Automatic partial pressure double gear pump
  • Automatic partial pressure double gear pump
  • Automatic partial pressure double gear pump

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Embodiment Construction

[0011] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0012] Such as Figure 1~3 As shown: the first-stage gear pump 2 (that is, the booster pump) is connected in series with the second-stage gear pump 5 (that is, the high-pressure pump); the partial pressure adjustment device 7 is separated by the shell 7-2, which is located in the shell and separates the inside of the shell It is composed of the piston 7-10 of the high-pressure chamber 7-6 and the low-pressure chamber 7-11, and the spring 7-1 that presses the piston tightly in the low-pressure chamber 7-11; there is a first oil port 7-1 on the housing 7-2. 3. The second oil port 7-5, the third oil port 7-7 and the fourth oil port 7-8, the piston 7-10 has a first annular groove 7-4 and a second annular groove 7-9. The first oil port 7-3 and the second oil port 7-5 are respectively connected to the inlet end of the first-stage gear pump 2 through...

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Abstract

The invention discloses a pressure distribution control dual gear pump, which belongs to a dual gear pump and aims to provide a dual gear pump which can balance loads at different stages. The pressure distribution control dual gear pump comprises two-stage gear pumps and a differential pressure adjusting device (7), wherein the two-stage gear pumps are connected in series; the differential pressure adjusting device (7) is formed by a piston (7-10) and a spring (7-1) which are positioned in a shell (7-2); a first oil port (7-3), a second oil port (7-5), a third oil port (7-7) and a fourth oil port (7-8) are formed in the shell (7-2), and two ring grooves are formed in the piston (7-10); the first oil port (7-3) and the second oil port (7-5) are respectively connected to the inlet end of the first-stage gear pump (2), a high-pressure cavity (7-6) and a fourth oil port (7-8) are respectively connected to the outlet end of the second-stage gear pump (5), and a low-pressure cavity (7-11) and the third oil port (7-7) are respectively connected to an oil way between the first-stage gear pump (2) and the second-stage gear pump (5). The dual gear pump has the advantages of stability in operation, long service life, high speed, high pressure and large flow.

Description

technical field [0001] The invention relates to a duplex gear pump, in particular to an automatic pressure dividing type duplex gear pump. Background technique [0002] As we all know, the duplex gear pump is composed of two-stage gear pumps in series; it has the characteristics of high speed, high pressure, and large flow. However, due to the incomplete matching between the two-stage gear pumps, the flow difference between the two-stage pumps leads to unbalanced loads of the two-stage pumps, which easily causes instantaneous pressure pulses to increase and cause damage to the one-stage pump with a large load. , resulting in a reduction in the life of the entire cascade pump. In addition, at the initial stage of starting, the two-stage gear pumps rotate at the same time; at this time, the oil pressure relationship between the two-stage gear pumps has not been established, so the gears of the second-stage pump are dry friction and easy to be damaged. Contents of the invent...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04C11/00F04C14/02F04C2/18F04C15/00
CPCF04C2/18F04C11/001F04C14/02F04C15/0088
Inventor 瞿祖勇唐庆刘安用夏艳
Owner GUIZHOU HONGLIN MACHINERY
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