阅读说明：本技术 一种往复式液压隔膜泵 (Reciprocating hydraulic diaphragm pump ) 是由 姜新喜 白士莹 范丘林 韩立国 冷严昊 张亚光 于 2020-05-27 设计创作，主要内容包括：本发明公开了一种往复式液压隔膜泵,包括传动箱体、柱塞、液压腔组件、隔膜头组件、补油管路和回油管路,所述液压腔组件内安装有缸套,缸套内装有柱塞；所述柱塞的末端通过轴承销安装有柱塞轴承,所述柱塞轴承与渐开线凸轮接触,渐开线凸轮与芯轴连接；所述柱塞上设有挡柱,挡柱与回位弹簧的一端连接,回位弹簧另一端与弹簧压盖连接。本发明提供的隔膜泵在运行时柱塞与轴心的距离等于渐开线凸轮的基圆半径,使柱塞在做功时除重力外没有其他侧向力,不会产生偏磨现象。渐开线凸轮推动柱塞向前运动时匀速直线运动,两个凸轮成180°布置,可持续地匀速输送介质,管路不用加蓄能器,即可形成平稳的压力。(The invention discloses a reciprocating hydraulic diaphragm pump which comprises a transmission box body, a plunger, a hydraulic cavity assembly, a diaphragm head assembly, an oil supplementing pipeline and an oil returning pipeline, wherein a cylinder sleeve is installed in the hydraulic cavity assembly, and the plunger is installed in the cylinder sleeve; the tail end of the plunger is provided with a plunger bearing through a bearing pin, the plunger bearing is in contact with an involute cam, and the involute cam is connected with the mandrel; and a blocking column is arranged on the plunger, the blocking column is connected with one end of a return spring, and the other end of the return spring is connected with a spring gland. The distance between the plunger and the axis of the diaphragm pump is equal to the base radius of the involute cam when the diaphragm pump operates, so that the plunger does not have other lateral force except gravity when doing work, and eccentric wear is avoided. The involute cams push the plunger piston to move forwards at a constant speed and move linearly, the two cams are arranged at 180 degrees, the medium can be continuously conveyed at a constant speed, and the pipeline can form stable pressure without adding an energy accumulator.)

1. A reciprocating hydraulic diaphragm pump is characterized by comprising a transmission box body (1), a plunger (2), a hydraulic cavity assembly (11), a diaphragm head assembly (18), an oil supplementing pipeline (20) and an oil returning pipeline (21); a cylinder sleeve (13) is installed in the hydraulic cavity assembly (11), the cylinder sleeve (13) is pressed by a front plug (14), and a plunger (2) is installed in the cylinder sleeve (13); the tail end of the plunger (2) is provided with a plunger bearing (4) through a bearing pin (22), the plunger bearing (4) is in contact with the involute cam (3), and the involute cam (3) is connected with the mandrel (8); be equipped with bumping post (6) on plunger (2), bumping post (6) are connected with return spring (7)'s one end, and return spring (7) other end is connected with spring gland (15).

2. A reciprocating hydraulic diaphragm pump according to claim 1, characterized in that the distance from the axis of the involute cam (3) to the centre line of the plunger (2) is equal to the base radius of the involute cam (3).

3. A reciprocating hydraulic diaphragm pump according to claim 1, characterized in that the involute cams (3) are used in pairs, two involute cams being arranged 180 ° opposite each other.

4. A reciprocating hydraulic diaphragm pump according to claim 1, characterized in that the plunger (2) is provided with a guide slot at one end, a guide frame (5) is mounted in the transmission housing (1), and the guide frame (5) cooperates with the guide slot on the plunger (2) to guide the plunger.

5. A reciprocating hydraulic diaphragm pump according to claim 1, characterized in that the plunger bearing (4) is selected from double row self aligning roller bearings.

6. The reciprocating hydraulic diaphragm pump according to claim 1, wherein the hydraulic chamber assembly (11) is located by matching with the transmission case (1) through a locating sleeve (12), the hydraulic chamber assembly (11) is filled with hydraulic oil, and both sides of the hydraulic chamber assembly (11) are provided with diaphragm head assemblies (18) which are arranged back to back.

7. A reciprocating hydraulic diaphragm pump according to claim 1, characterized in that the return spring (7) is provided with a spring jacket (16) outside.

8. The reciprocating hydraulic diaphragm pump according to any one of claims 1 to 7, wherein a key groove is arranged in a shaft hole of the involute cam (3) and is connected with the mandrel (8) through a key (23); the mandrel (8) and the bearing (9) are arranged on the transmission box body (1) through a bearing gland (10).

9. A reciprocating hydraulic diaphragm pump according to claim 8, characterized in that the mounting hole of the bearing gland (10) is larger than the outer circle of the involute cam (3).

Technical Field

The invention relates to the field of reciprocating pumps, in particular to a reciprocating hydraulic diaphragm pump.

Background

Most of the existing reciprocating pumps are driven by a crankshaft or an eccentric block, and a positive sine wave type pulsation curve is formed during operation. The pulsation is very large, the requirement on the strength of the cylinder body is high, and materials need to be added to ensure the strength. Meanwhile, buffering devices such as an energy accumulator and the like are additionally arranged on the pipeline.

Reciprocating pump bent axle is rotatory a week, promotes and pulls cross head and the reciprocal a week of plunger through the connecting rod, has three striking, and one is cross head striking cross head slide, and the second department is cross head round pin and connecting rod striking, and the third department is bent axle and connecting rod striking, and striking produces noise and vibration everywhere, causes environmental pollution. The crosshead and the plunger have lateral force during operation, so that the crosshead and the slideway are abraded, the plunger and the filler are eccentrically worn, and particularly when the plunger does work, the lateral force can reach 10% of the thrust of the plunger, so that the service life is influenced. At present, a three-plunger structure is used more frequently, when the viscosity of a conveying medium is higher, the operation rotating speed is lower, the structure is huge, the structure is complex, the weight is very large, the cost is high, and the number of fault points is large. Meanwhile, more waste products and garbage can be generated, and environmental pollution is caused.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a reciprocating hydraulic diaphragm pump, which adopts a new involute cam to drive a plunger to work, the involute cam pushes the plunger to move forwards and linearly move at a constant speed, the two cams are arranged in an opposite 180 degrees, the medium can be continuously conveyed at a constant speed, and a pipeline can form stable pressure without adding an energy accumulator.

In order to solve the technical problems, the technical scheme of the invention is as follows: a reciprocating hydraulic diaphragm pump comprises a transmission box body, a plunger, a hydraulic cavity assembly, a diaphragm head assembly, an oil supplementing pipeline and an oil returning pipeline; a cylinder sleeve is arranged in the hydraulic cavity assembly and is compressed by a front plug, and a plunger is arranged in the cylinder sleeve; the tail end of the plunger is provided with a plunger bearing through a bearing pin, the plunger bearing is in contact with an involute cam, and the involute cam is connected with the mandrel; and a blocking column is arranged on the plunger, the blocking column is connected with one end of a return spring, and the other end of the return spring is connected with a spring gland.

Preferably, the distance from the axis of the involute cam to the central line of the plunger is equal to the base radius of the involute cam.

Preferably, the involute cams are used in pairs, with the two involute cams being arranged 180 ° opposite each other.

Preferably, one end of the plunger is provided with a guide groove, a guide frame is arranged in the transmission box body, and the guide frame is matched with the guide groove on the plunger to guide the plunger.

Preferably, the plunger bearing is a double-row self-aligning roller bearing.

Preferably, the hydraulic chamber component is matched and positioned with the transmission case body through a positioning sleeve, hydraulic oil is filled in the hydraulic chamber component, diaphragm head components are arranged on two sides of the hydraulic chamber component, and the diaphragm head components are arranged back to back.

Preferably, a spring sheath is arranged outside the return spring.

Preferably, a key groove is arranged in a shaft hole of the involute cam and is connected with the mandrel through a key; the mandrel and the bearing are arranged on the transmission box body through a bearing gland.

Preferably, the mounting hole of the bearing gland is larger than the outer circle of the involute cam.

Compared with the prior art, the invention has the following beneficial effects: the vertical distance between the central line of the plunger and the axis of the pump is equal to the radius of the base circle of the involute cam when the pump runs, so that the plunger does not have other lateral forces except gravity when acting, and eccentric wear is avoided. The involute cams push the plunger piston to move forwards at a constant speed and move linearly, the two cams are arranged at 180 degrees, the medium can be continuously conveyed at a constant speed, and the pipeline can form stable pressure without adding an energy accumulator. Meanwhile, the diaphragm heads are arranged on two sides, so that the plunger stroke can be improved, the single plunger has large displacement and compact structure, and the structural advantage is more obvious particularly when a medium with high viscosity is conveyed.

Drawings

FIG. 1 is a front sectional view of a diaphragm pump provided by the present invention;

FIG. 2 is a top sectional view of a diaphragm pump provided by the present invention;

FIG. 3 is a profile graph of an involute cam;

FIG. 4 is a structural view of an involute cam;

FIG. 5 is a view showing the arrangement of two involute cams;

the labels in the figure are: the hydraulic self-locking device comprises a transmission case 1, a plunger 2, an involute cam 3, a plunger bearing 4, a guide frame 5, a catch 6, a return spring 7, a mandrel 8, a bearing 9, a bearing gland 10, a hydraulic cavity assembly 11, a positioning sleeve 12, a cylinder sleeve 13, a front plug 14, a spring gland 15, a spring sheath 16, a cover plate 17, a diaphragm head assembly 18, a valve bank 19, an oil supplementing pipeline 20, an oil returning pipeline 21, a bearing pin 22, a key 23 and a guide groove 24.

Detailed Description

The technical solutions of the present invention will be described in further detail with reference to the drawings and specific examples, but the present invention is not limited to the following technical solutions.