Design method and device capable of eliminating hydraulic pulsation

A design method and hydraulic pulse technology, applied in the field of hydraulic pumps, can solve problems such as unstable speed, high cost, and adverse effects on the system, and achieve the effect of avoiding fluctuations in liquid flow and supplying liquid at a uniform speed

Active Publication Date: 2019-12-31
启东精马液压有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The embodiment of the present invention provides a design method and device capable of eliminating hydraulic pulsation, the purpose of which is to solve the problem of reduced system life, high noise, high cost and unstable speed due to hydraulic pulsation during the use of existing hydraulic pumps , and problems caused by trapped oil that are not conducive to energy saving and adverse effects of temperature rise on the system are improved

Method used

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  • Design method and device capable of eliminating hydraulic pulsation
  • Design method and device capable of eliminating hydraulic pulsation
  • Design method and device capable of eliminating hydraulic pulsation

Examples

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Embodiment 1

[0036] The method of the present invention can be applied to all types of gear pumps, including internal gear pumps and external gear pumps. In this embodiment, the external gear pump is taken as an example, such as figure 1 As shown, it is a structure for eliminating hydraulic pulses of a circumscribed gear pump, including gear pump A11 and gear pump B12 arranged in series, the gear pump A11 and gear pump B12 are arranged in the same cavity, one end of the cavity The gear pump A11 and the gear pump B12 are connected with the driving device, and are driven by the driving device to rotate at a constant angular speed. The gear pump A11 includes a rotary piston a 111 and a rotary piston b 112 that are matched with each other, the gear pump B12 includes a rotary piston c 121 and a rotary piston d 122, and each of the rotary piston a-rotary piston d is provided with a vane. The lobe is a fan-shaped lobe, the size and shape of the outer arc of the fan-shaped lobe on the rotary pisto...

Embodiment 2

[0042] like figure 2 As shown, it is an embodiment designed for the vane pump using the method of the present invention. Taking two pump bodies connected in series as an example, the vane pump liquid supply system of this embodiment specifically includes a vane pump A21 and a vane pump B22. The vane pump Both A21 and vane pump B22 include a stator and a rotating rotor. The stator includes two arcs whose profiles are regular arcs, and the two arcs are located within the range of the pump oil angle. The liquid angles are γ1 and γ2, the pump liquid angle of the vane pump B22 is, the sum of the angles added by the γ1, γ2, δ1, and δ2 is at least 360°; and the transition curve connecting the perfect circular arcs at both ends is located at In the non-pump angle range, the transition curve is in tangential contact with the rotor. The rotor is connected with a driving device, and the driving device drives the rotor to rotate at a constant angular speed.

[0043] The following takes...

Embodiment 3

[0049] like Figure 5 As shown, a plunger pump is an embodiment when the technical solution of the present invention is applied, and this embodiment is described by taking two single plunger pumps connected in series as an example.

[0050] The plunger pump liquid supply system of this embodiment includes two single plunger pumps connected in series, plunger pump A31 and plunger pump B32. The plunger pump A31 includes a hydraulic cylinder a311 and a hydraulic cylinder b312. The hydraulic cylinder A311 and the piston rod of the hydraulic cylinder b312 are rigidly connected by the connecting piece a313, such as Image 6 As shown, the connecting piece a313 is a C-shaped piece, the two outer sides are respectively connected with the piston rods of the hydraulic cylinder a311 and the hydraulic cylinder b312, and the two inner sides of the connecting piece are in tangential contact with the cam a314, so that the The piston rod moves horizontally with the rotation of the cam. Since ...

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Abstract

The invention discloses a design method capable of eliminating hydraulic pulsation and a device capable of eliminating hydraulic pulsation. The technical scheme of the invention is that a plurality ofsingle hydraulic pumps are connected in series to form a hydraulic pump system to alternate pump fluid, when the single hydraulic pumps act in the respective pump fluid angles, the instantaneous flowrates are kept equal; and the pump fluid angles of all the single hydraulic pumps in the hydraulic pump system add up to at least 360 degrees by setting the angles of the hydraulic pumps. A structural example of applying the method to different types of hydraulic pumps is disclosed, by means of a method alternating pump fluid by the hydraulic pumps connected in series, and the equal instantaneousflow rates of the single hydraulic pumps connected in series, it is ensure that the hydraulic pump system can continuously output hydraulic oil with stable pressure, avoid the problems of system lifereduction, high noise, high cost and unstable rotational speed caused by hydraulic impulse, provide new ideas and schemes to solve the hydraulic impulse problem in the industry, and promote the development of industry technology.

Description

technical field [0001] The invention belongs to the field of hydraulic pumps, and in particular relates to a design method and device capable of eliminating hydraulic pulsation. Background technique [0002] At present, whether the hydraulic pump is a gear pump, a plunger pump or a vane pump, there are some defects in the hydraulic pulsation due to the unstable change of the pump oil volume. ; When used on processing machine tools, the speed of rotation will be unstable, which will affect the processing accuracy and reduce reliability. The common solution at present is to add additional devices, such as assembling a pressure reducing valve, so that the hydraulic pump can passively reduce the hydraulic pulsation. Although the hydraulic pulsation can be reduced to a certain extent, it cannot solve the problem of hydraulic pulsation from the root cause, and it will lead to cost increase problem. [0003] At present, the ordinary gear pump has the phenomenon of trapped oil. Si...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04C11/00F04C2/18F04C2/344F04B23/06F04B9/04F04B1/02F04B11/00
CPCF04B1/02F04B9/042F04B11/00F04B23/06F04C2/18F04C2/3446F04C11/001
Inventor 姚长水
Owner 启东精马液压有限公司
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