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Low-pressure and large-displacement variable pump

A large displacement, variable pump technology, applied in the field of variable pumps, can solve the problems of high working pressure, high cost, complex structure, etc., and achieve the effects of low cost, low energy consumption, and large power loss.

Inactive Publication Date: 2018-11-23
NANTONG RAINBOW HEAVY MACHINERIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Piston pump: high precision, good sealing performance, high working pressure, but complex structure and high cost

Method used

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  • Low-pressure and large-displacement variable pump

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Embodiment Construction

[0020] The technical solutions of the present invention will be clearly and completely described below through specific embodiments.

[0021] Such as figure 1 As shown, it is a low-pressure large-displacement variable pump of the present invention, which consists of a motor 1, a small-displacement plunger pump 2, a high-pressure relief valve 3, a small-displacement hydraulic motor 4, a large-displacement quantitative gear pump 5, and a system Relief valve 6, adjustment damping 7 composition;

[0022] Motor 1 provides power to the entire hydraulic system, limiting the maximum power demand of the system.

[0023] The small-displacement plunger pump 2 is responsible for supplying hydraulic oil to the small-displacement plunger motor 4, the displacement of the small-displacement plunger pump 2 is adjustable, and forms a volume speed regulation circuit with the small-displacement plunger motor 4 ( figure 1 The range within the middle and lower dotted line box), the volume speed r...

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Abstract

The invention discloses a low-pressure and large-displacement variable pump. The low-pressure and large-displacement variable pump is composed of a motor, a volume speed regulating circuit, a quantitative gear pump and a damper regulator, wherein the quantitative gear pump, the damper regulator and a system main oil circuit connected with the quantitative gear pump form a load system; the damper regulator is connected with the system main oil circuit and is used for regulating the flow of the main oil circuit; the volume speed regulating circuit is connected with the quantitative gear pump andis used for providing a rotation speed for the quantitative gear pump; and the volume speed regulating circuit is powered by the motor. Several common, simple and low-cost hydraulic parts are used for forming an uncommon and high-cost hydraulic part, thereby not only solving the problem of high cost of a large-displacement plunger pump but also solving the problem of large power loss of a large-displacement quantitative gear pump so as to completely meet client requirements.

Description

technical field [0001] The invention relates to a variable displacement pump, in particular to a variable displacement pump with low pressure and large displacement. Background technique [0002] The hydraulic pump is an energy conversion device of the hydraulic system, which is responsible for converting the mechanical energy of the power source into the pressure energy of the hydraulic system, that is, outputting a certain pressure and flow of liquid to the hydraulic system. [0003] According to the structure, hydraulic pumps can be roughly divided into several types: vane pumps, gear pumps, plunger pumps, etc. If classified according to the pressure level, they can also be roughly divided into low-pressure pumps, medium-pressure pumps, and high-pressure pumps. Among them, the characteristics of several hydraulic pumps are as follows: [0004] Vane pump: compact structure, small size, low noise, but poor anti-pollution performance, low pressure rating, and poor low-speed...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B15/18F15B11/00
CPCF15B11/00F15B15/18F15B2211/214
Inventor 高剑钊何涛辛少云李文龙
Owner NANTONG RAINBOW HEAVY MACHINERIES