阅读说明：本技术 一种变量泵控制器 (Variable pump controller ) 是由 刘兴林 唐宝 刘运录 于 2021-08-03 设计创作，主要内容包括：本发明公开了一种变量泵控制器,包括液压变量泵和变量泵控制器主体,所述液压变量泵的底部安装有底座,且变量泵控制器主体设置在底座的底部,所述底座的底部安装有两个相互对称的限位滑道,且变量泵控制器主体设置在两个限位滑道之间,所述变量泵控制器主体的两侧分别固定连接有滑条,且滑条由限位滑道的一端活动插入限位滑道内,所述限位滑道上相互远离的一侧面分别固定连接有调节块,所述调节块内设置有限位挡板,且限位挡板上固定连接有梯形卡块,所述梯形卡块活动穿过限位滑道,并延伸至变量泵控制器主体的一侧。采用电机控制器+永磁无刷电机+变量泵的技术方案,可实现电动泵的低转速、小流量和恒压力控制。(The invention discloses a variable pump controller, which comprises a hydraulic variable pump and a variable pump controller main body, wherein a base is installed at the bottom of the hydraulic variable pump, the variable pump controller main body is arranged at the bottom of the base, two mutually symmetrical limiting slideways are installed at the bottom of the base, the variable pump controller main body is arranged between the two limiting slideways, two sides of the variable pump controller main body are respectively and fixedly connected with a sliding strip, one end of the sliding strip is movably inserted into the limiting slideway, one side surfaces, far away from each other, of the limiting slideways are respectively and fixedly connected with an adjusting block, a limiting baffle is arranged in the adjusting block, a trapezoidal clamping block is fixedly connected onto the limiting baffle, and the trapezoidal clamping block movably penetrates through the limiting slideways and extends to one side of the variable pump controller main body. By adopting the technical scheme of the motor controller, the permanent magnet brushless motor and the variable pump, the low-rotating-speed, small-flow and constant-pressure control of the electric pump can be realized.)

1. A variable pump controller comprises a hydraulic variable pump (1) and a variable pump controller main body (3), and is characterized in that a base (2) is installed at the bottom of the hydraulic variable pump (1), the variable pump controller main body (3) is arranged at the bottom of the base (2), two mutually symmetrical limiting slide ways (4) are installed at the bottom of the base (2), the variable pump controller main body (3) is arranged between the two limiting slide ways (4), two sides of the variable pump controller main body (3) are respectively and fixedly connected with a slide bar, the slide bar is movably inserted into the limiting slide ways (4) from one end of each limiting slide way (4), one side surfaces, which are far away from each other, on the limiting slide ways (4) are respectively and fixedly connected with an adjusting block (5), a limiting baffle plate (9) is arranged in the adjusting block (5), and a trapezoidal clamping block (10) is fixedly connected onto the limiting baffle plate (9), trapezoidal fixture block (10) activity is passed spacing slide (4) to extend to one side of variable pump controller main part (3), variable pump controller main part (3) and the mutual electric connection of motor BLDC, and motor BLDC electric connection has hydraulic pressure variable pump.

2. A variable displacement pump controller according to claim 1, wherein the hydraulic variable displacement pump is connected with the variable displacement pump controller body (3) through a swash plate angular displacement signal, and the motor BLDC is connected with the variable displacement pump controller body (3) through a motor HALL signal.

3. The variable pump controller according to claim 1, wherein an adjusting groove (6) is formed in the surface of the base (2), a moving rod (7) is slidably connected to the surface of the adjusting groove (6), one end of the moving rod (7) movably penetrates through the adjusting block (5) and is fixedly connected to the limiting baffle (9), and a pulling block is fixedly connected to one end of the moving rod (7) inserted into the adjusting block (5).

4. A variable pump controller according to claim 3, wherein the limit baffle (9) is connected with one side inner wall of the adjusting block (5) through a support spring (8), and the support springs (8) are respectively arranged at two sides of the moving rod (7).

5. The variable pump controller according to claim 1, wherein an opening is formed in one end of the limiting slide way (4), the opening is communicated with the inside of the limiting slide way (4), and the adjusting block (5) is arranged at one end, close to the opening, of the limiting slide way (4).

6. The variable pump controller according to claim 1, wherein the trapezoidal fixture block (10) has a right-angled trapezoidal structure, and the trapezoidal fixture block (10) is connected to the surface of the variable pump controller main body (3).

Technical Field

The invention relates to the technical field of variable pump controllers, in particular to a variable pump controller.

Background

The hydraulic electric pump is used as an intermediate medium in a hydraulic transmission system, plays a role in transferring and converting energy, and plays a role in lubricating, preventing corrosion, cooling, flushing and the like of parts in the hydraulic electric pump.

The traditional hydraulic electric pump is generally driven by an alternating current asynchronous motor and runs at a constant rotating speed. The corresponding hydraulic pump is a variable pump, the rotating speed is unchanged, and the angle of the swash plate is adjusted through an internal self-adjusting structure, so that the variable displacement, the variable flow and the constant pressure are realized. At constant pressure and low flow, higher rotational speeds can significantly reduce the life of the hydraulic pump. The rotating speed of the alternating current asynchronous motor is mainly determined by the frequency of a power grid, and the speed is difficult to regulate. We have therefore developed this and propose a variable displacement pump controller.

Disclosure of Invention

In order to solve the technical problems, the invention provides the following technical scheme:

the invention relates to a variable pump controller, which comprises a hydraulic variable pump and a variable pump controller main body, wherein a base is arranged at the bottom of the hydraulic variable pump, the variable pump controller main body is arranged at the bottom of the base, two mutually symmetrical limiting slide ways are arranged at the bottom of the base, the variable pump controller main body is arranged between the two limiting slide ways, two sides of the variable pump controller main body are respectively and fixedly connected with a slide bar, one end of the slide bar is movably inserted into the limiting slide way, one side surfaces, far away from each other, of the limiting slide ways are respectively and fixedly connected with an adjusting block, a limiting baffle is arranged in the adjusting block, a trapezoidal clamping block is fixedly connected onto the limiting baffle, the trapezoidal clamping block movably penetrates through the limiting slide ways and extends to one side of the variable pump controller main body, and the variable pump controller main body is electrically connected with a motor BLDC, and the motor BLDC is electrically connected with a hydraulic variable pump.

As a preferred technical solution of the present invention, the hydraulic variable displacement pump is connected to the variable pump controller main body by a swash plate angular displacement signal, and the motor BLDC is connected to the variable pump controller main body by a motor HALL signal.

As a preferred technical scheme of the invention, the surface of the base is provided with an adjusting groove, the surface of the adjusting groove is connected with a moving rod in a sliding manner, one end of the moving rod movably penetrates through the adjusting block and is fixedly connected to the limiting baffle, and one end of the moving rod, which is inserted into the adjusting block, is fixedly connected with a pulling block.

As a preferred technical scheme of the invention, the limiting baffle is connected with the inner wall of one side of the adjusting block through supporting springs, and the supporting springs are respectively arranged on two sides of the moving rod.

As a preferred technical scheme device of the invention, one end of the limiting slide way is provided with an opening, the opening is communicated with the inside of the limiting slide way, and the adjusting block is arranged at one end of the limiting slide way close to the opening.

As a preferred technical scheme of the invention, the trapezoid clamping block is of a right-angled trapezoid structure, and the trapezoid clamping block is connected with the surface of the variable pump controller main body.

The invention has the beneficial effects that: this kind of novel variable pump controller, the displacement self-interacting constant voltage characteristic of make full use of variable pump gathers the sloping cam plate angle of hydraulic pump, adjusts motor speed, and its main innovation point is as follows:

(1) detecting the angle of the swash plate by adopting the RVDT;

(2) the controller collects the angle signal of the swash plate and controls the rotating speed of the motor;

(3) the rotating speed of the constant-pressure variable pump is dynamically controlled, so that the electric pump is prevented from operating in a high-rotating-speed and low-flow state for a long time, and the service life of the electric pump is prolonged;

by adopting the technical scheme of the motor controller, the permanent magnet brushless motor and the variable pump, the low-rotating-speed, small-flow and constant-pressure control of the electric pump can be realized.

Drawings

FIG. 1 is a schematic diagram of a variable displacement pump controller according to the present invention;

FIG. 2 is a schematic diagram of a base plate structure of a variable displacement pump controller according to the present invention;

FIG. 3 is an enlarged view taken at A of FIG. 2 in accordance with the present invention;

fig. 4 is a circuit diagram of a variable displacement pump controller of the present invention.

In the figure: 1. a hydraulic variable displacement pump; 2. a base; 3. a variable pump controller body; 4. a limiting slide way; 5. an adjusting block; 6. an adjustment groove; 7. a travel bar; 8. a support spring; 9. a limit baffle; 10. trapezoidal fixture block.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.

Example (b): as shown in fig. 1-4, the variable pump controller of the present invention comprises a hydraulic variable pump 1 and a variable pump controller body 3, wherein a base 2 is installed at the bottom of the hydraulic variable pump 1, the variable pump controller body 3 is arranged at the bottom of the base 2, two mutually symmetrical limiting slideways 4 are installed at the bottom of the base 2, the variable pump controller body 3 is arranged between the two limiting slideways 4, two sides of the variable pump controller body 3 are respectively and fixedly connected with a slide bar, the slide bar is movably inserted into the limiting slideways 4 from one end of the limiting slideways 4, one side surfaces far away from each other on the limiting slideways 4 are respectively and fixedly connected with an adjusting block 5, a limiting baffle 9 is arranged in the adjusting block 5, a trapezoidal fixture block 10 is fixedly connected to the limiting baffle 9, the trapezoidal fixture block 10 movably penetrates through the limiting slideways 4 and extends to one side of the variable pump controller body 3, the variable pump controller body 3 is electrically connected to the motor BLDC, and the motor BLDC is electrically connected to the hydraulic variable pump.

The hydraulic variable pump is connected with the variable pump controller main body 3 through an inclined disc angular displacement signal, and the motor BLDC is connected with the variable pump controller main body 3 through a motor HALL signal.

Wherein, adjustment tank 6 has been seted up on the surface of base 2, and the surperficial sliding connection of adjustment tank 6 has carriage release lever 7, and the one end activity of carriage release lever 7 passes regulating block 5 to fixed connection is on limit baffle 9, inserts the one end fixedly connected with pulling block in regulating block 5 on the carriage release lever 7.

Wherein, be connected through supporting spring 8 between spacing baffle 9 and one side inner wall of regulating block 5, and supporting spring 8 sets up the both sides at carriage release lever 7 respectively.

Wherein, the opening has been seted up to the one end of spacing slide 4, and the inside of opening part intercommunication spacing slide 4, and regulating block 5 sets up the one end that is close to the opening part at spacing slide 4.

Wherein, the trapezoid fixture block 10 is a right trapezoid structure, and the trapezoid fixture block 10 is connected with the surface of the variable pump controller main body 3.

The working principle is as follows: the variable pump controller main body 3 drives the permanent magnet brushless motor to operate, detects an inclined disc angular displacement signal in real time, and adjusts the rotating speed of the motor BLDC when the inclined disc angle of the hydraulic variable pump 1 changes along with the load demand behind the pump, so that the hydraulic variable pump 1 can operate at a lower rotating speed when the flow is small;

the variable pump controller main body 3 drives the permanent magnet brushless motor to operate, drives the hydraulic variable pump 1 to operate in a rated working state, when the flow demand is changed after the pump, the angle of a swash plate of the hydraulic variable pump 1 is changed, and an output signal of an angular displacement sensor is collected by the variable pump controller to adjust the rotating speed of the motor;

receiving command information sent by an upper computer, driving a motor to operate, and simultaneously carrying out closed-loop control on the rotating speed and current of the motor; and detecting a rotary angular displacement signal (RVDT) on the swash plate of the hydraulic variable displacement pump 1 in real time, and adjusting the rotating speed of the motor when detecting the angle change of the swash plate. When the hydraulic variable pump 1 has a large flow load demand, the angle of the swash plate changes along with the change, the rotating speed of the motor is increased, and when the load is a small flow load behind the pump, the rotating speed of the motor is reduced;

the motor BLDC is driven by a motor controller to drive the permanent magnet brushless motor to operate and output rotating speed and torque;

rotational angular displacement signal: detecting the angle of a swash plate of the hydraulic variable pump, and outputting a swash plate angle signal as a feedback signal for regulating the rotating speed of the motor;

variable pump controller main part 3 of this device installs through trapezoidal fixture block 10, and the one end of pulling carriage release lever 7 drives trapezoidal piece 10 and is close to in the regulating block 5, contracts trapezoidal piece 10, and in the draw runner inserted spacing slide 4, extrudees trapezoidal piece 10, after removing to target in place, trapezoidal piece 10 no longer receives the extrusion, supports through supporting spring 8, and trapezoidal piece 10 removes one side of variable pump controller main part 3.

Finally, it should be noted that: in the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.