Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Gear pump and method for manufacturing same

A technology of gear pumps and internal teeth, applied to pumps, pump components, rotary piston pumps, etc., can solve problems such as volumetric efficiency reduction, noise, vibration, etc.

Inactive Publication Date: 2017-09-26
AISIN KIKO CO LTD +1
View PDF7 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the minimum gap between the outer teeth and the inner teeth on the partition wall is reduced, cavitation will occur when the fluid flows into the pump chamber connected to the suction port, which may lower the volumetric efficiency and cause noise and vibration.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Gear pump and method for manufacturing same
  • Gear pump and method for manufacturing same
  • Gear pump and method for manufacturing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0015] Next, modes for implementing the present invention will be described with reference to the drawings.

[0016] figure 1 It is a schematic configuration diagram showing the gear pump 1 according to one embodiment of the present invention. The gear pump 1 shown in this figure is configured, for example, as an oil pump mounted on a vehicle not shown, which sucks hydraulic fluid (ATF) stored in an oil pan and pressurizes it to a hydraulic control device (both not shown). deliver. The gear pump 1 includes, for example: a pump housing (both not shown in the drawing) composed of a pump body fixed to a transmission housing of an automatic transmission and a pump cover fastened to the pump body; and an inner rotor (transmission gear) 2 and an outer rotor (driven gear) 3, the inner rotor (transmission gear) 2 and the outer rotor (driven gear) 3 are respectively rotatably disposed in a gear housing chamber (not shown) defined by the pump housing. In addition, the gear pump 1 may...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A plurality of external teeth 20 of an inner rotor 2 are formed such that the intake-side clearance CLi is greater than the discharge-side clearance CLd, where the intake-side clearance is the minimum value of clearance CLi between external teeth 20i and internal teeth 30i delineating an inter-tooth chamber 5 that is in communication with an intake port 6 and will demonstrate the largest change in volume when the inner rotor 2 rotates by a unit angle, and the discharge-side clearance CLd is the minimum value of clearance CLd between external teeth 20d and internal teeth 30d delineating an inter-tooth chamber 5 at least partially overlapping a partition wall 9 between first and second discharge ports 7, 8 when the change in volume per unit angle is largest.

Description

technical field [0001] The present invention relates to a gear pump including an inner rotor having a plurality of outer teeth and an outer rotor having a plurality of inner teeth and arranged eccentrically with respect to the inner rotor, and a manufacturing method thereof. Background technique [0002] At present, as a gear pump, there is known a pump chamber (interdental chamber) which communicates with a pump chamber (interdental chamber) whose volume increases due to the rotation of the two gears among the pump chambers formed by the division of the external teeth of the external gear and the internal teeth of the internal gear. port and two discharge ports communicating with a pump chamber whose volume is reduced by the rotation of two gears (for example, see Patent Document 1). This gear pump is designed such that the minimum gap between the external teeth and the internal teeth on the partition wall separating the two discharge ports is 0.020 mm or more in a state wh...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): F04C2/10
CPCF04C2/084F04C2/102F04C15/0065F04C15/06F04C2230/20F04C2250/20
Inventor 木村雅幸服部雅士武田光博
Owner AISIN KIKO CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com