Duplex external gear pump

A technology of external meshing and gear pumps, which is applied in the direction of pumps, pump components, pump control, etc., to achieve the effects of optimizing the control structure, improving the working conditions and efficiency, and simplifying the switching control operation

Inactive Publication Date: 2021-06-01
宁波真格液压科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in the existing working conditions, it is sometimes necessary for the gear pump to be able to freely switch between high pressure and low flow and low pressure and high flow. However, the current conventional gear pumps cannot effectively meet this requirement. This invention proposes a double pump with a new structure

Method used

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Embodiment Construction

[0026] The technical solutions of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0027] combine Figure 1 to Figure 7 As shown, the double-connected external gear pump of this embodiment includes a pump body 1 , a driving gear 2 , a primary driven gear set, a secondary driven gear set and a variable plunger 5 .

[0028] The pump body 1 is provided with an oil inlet 11 connected to an external low-pressure pipeline and an oil outlet 12 connected to an external high-pressure pipeline. The driving gear 2 adopts a double gear shaft structure, and one end is located outside the pump body 1 to connect with external driving equipment, and the other end is provided with two parallel gears and is located inside the pump body 1 .

[0029] The first-stage driven gear set is made up of the first-stage driven gear 31 and the second-stage driven gear 32, and the first-stage driven gear 31 and the second-stage...

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Abstract

The invention provides a duplex external gear pump which comprises a pump body, a driving gear, a first-stage driven gear set, a second-stage driven gear set and a variable plunger. The driving gear, the first-stage driven gear set and the second-stage driven gear set are located in the pump body, the first-stage driven gear set and the second-stage driven gear set are in meshing connection with different radial sections of the driving gear respectively, a first-stage oil suction cavity and a first-stage oil discharge cavity are formed in the meshing position of the driving gear and the first-stage driven gear set, and a second-stage oil suction cavity and a second-stage oil discharge cavity are formed in the meshing position of the driving gear and the second-stage driven gear set. The variable plunger is movably connected with the pump body so as to control the communication relation between an oil inlet and the first-stage oil suction cavity and the second-stage oil suction cavity, the communication relation between an oil outlet and the first-stage oil discharge cavity and the second-stage oil discharge cavity and the communication relation between the first-stage oil discharge cavity and the second-stage oil suction cavity. The duplex external gear pump disclosed by the invention can be switched between high-pressure small flow and low-pressure large flow, can be used under more working conditions, and has higher use efficiency.

Description

technical field [0001] The invention belongs to the technical field of gear pumps, and in particular relates to a double-connected external meshing gear pump. Background technique [0002] The gear pump has the advantages of simple structure, small size, light weight, few parts, good manufacturability, easy manufacture, convenient maintenance, low price, good self-priming performance, etc., and is not sensitive to oil pollution, and is not easy to be seized during work Or stuck, it can transport high-viscosity oil and thick fluid, so it is widely used in the hydraulic field. [0003] However, in the existing working conditions, it is sometimes necessary for the gear pump to be able to freely switch between high pressure and small flow and low pressure and large flow, but the current conventional gear pumps cannot effectively meet this requirement. The present invention proposes a double-connected pump with a brand-new structural form. Contents of the invention [0004] I...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04C2/18F04C11/00F04C14/02F04C14/10F04C14/24F04C15/06
CPCF04C2/18F04C11/001F04C14/02F04C14/10F04C14/24F04C15/06F04C15/064
Inventor 董光斌岳春秀
Owner 宁波真格液压科技有限公司
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