阅读说明：本技术 一种凸轮滑块式柱塞泵 (Cam slider type plunger pump ) 是由 赵孟军 于 2019-11-29 设计创作，主要内容包括：本发明公开了一种凸轮滑块式柱塞泵,包括柱塞-活塞组、缸筒、传动轴承座、高压泵液力端、凸轮滑块组和低压供油系统,所述缸筒由内径依次递减的三段同轴圆筒组成,在所述缸筒的内部设置有所述柱塞-活塞组；所述传动轴承座固定在所述缸筒的上部,所述凸轮滑块组固定在所述传动轴承座上,所述凸轮滑块组与所述柱塞-活塞组接触；所述高压液力端连接在所述缸筒的下端,所述低压供油系统与所述高压泵液力端相连。本发明的有益效果为：具有支撑力大、运动灵活,摩擦系数极小等优点。(The invention discloses a cam slider type plunger pump, which comprises a plunger-piston group, a cylinder barrel, a transmission bearing seat, a high-pressure pump hydraulic end, a cam slider group and a low-pressure oil supply system, wherein the cylinder barrel consists of three sections of coaxial cylinders with successively decreasing inner diameters, and the plunger-piston group is arranged inside the cylinder barrel; the transmission bearing seat is fixed at the upper part of the cylinder barrel, the cam slider group is fixed on the transmission bearing seat, and the cam slider group is in contact with the plunger-piston group; the high-pressure hydraulic end is connected to the lower end of the cylinder barrel, and the low-pressure oil supply system is connected with the high-pressure pump hydraulic end. The invention has the beneficial effects that: the support device has the advantages of large support force, flexible movement, extremely small friction coefficient and the like.)

1. A cam slider type plunger pump is characterized by comprising a plunger-piston set, a cylinder barrel, a transmission bearing seat, a high-pressure pump hydraulic end, a cam slider set and a low-pressure oil supply system, wherein the cylinder barrel consists of three sections of coaxial cylinders with successively decreasing inner diameters, and the plunger-piston set is arranged inside the cylinder barrel; the transmission bearing seat is fixed at the upper part of the cylinder barrel, the cam slider group is fixed on the transmission bearing seat, and the cam slider group is in contact with the plunger-piston group; the hydraulic end of the high-pressure pump is connected to the lower end of the cylinder barrel, and the low-pressure oil supply system is connected with the hydraulic end of the high-pressure pump.

2. The cam-slide plunger pump of claim 1, wherein the plunger-piston set is comprised of a high-pressure end plunger disposed below the high-pressure end piston, a pressure transfer medium, a low-pressure end plunger disposed below the low-pressure end piston, and a low-pressure end piston filled with the pressure transfer medium therebetween; and the upper part of the low-pressure end piston is provided with a slide block groove.

3. The cam-slide plunger pump of claim 1, wherein the plunger-piston set is a stepped shaft sized to fit a cylinder barrel; the upper part of the stepped shaft is provided with a slide block groove.

4. The cam-slide plunger pump of claim 2, wherein the high-pressure side plunger has a cylindrical slide groove therein, the groove coinciding with the central axis of the high-pressure side plunger.

5. A cam-slide plunger pump as in claim 3 wherein the lowermost portion of the stepped shaft is provided with a cylindrical recess coinciding with the central axis of the stepped shaft.

6. The cam-slide-block-type plunger pump according to claim 2 or 3, wherein the hydraulic end of the high-pressure pump comprises a three-way oil passage, a high-pressure check valve and a low-pressure check valve, three outlets of the three-way oil passage are respectively connected to the high-pressure check valve, the low-pressure check valve and the lower end of the cylinder barrel, and the low-pressure check valve is connected to the low-pressure oil supply system.

7. The cam-slider plunger pump of claims 2 or 3, wherein the cam-slider set comprises a cam, a needle bearing, a slider, a linear bearing, a drive shaft and a drive bearing, the drive shaft is mounted on the drive bearing seat through the drive bearing, the cam is mounted in the middle of the drive shaft, the needle bearing is disposed outside the cam, the linear bearing is disposed in the slider groove, and the slider is located between the linear bearing and the needle bearing.

8. A cam-slide plunger pump according to claim 2 or 3, characterized in that the plunger cylinder comprises a piston cylinder and a plunger cylinder, the inner diameter of the piston cylinder being equal to the outer diameter of the plunger cylinder.

9. The cam slider type plunger pump of claim 8, wherein the side wall of the piston cylinder is provided with piston cylinder air holes, and the side wall of the plunger cylinder is provided with plunger cylinder air holes.

Technical Field

The invention belongs to the technical field of ultrahigh pressure of liquid, and particularly relates to a cam slider plunger pump.

Background

The ultrahigh pressure equipment is equipment with the working pressure higher than 100MPa, and is widely applied to the fields of material processing, chemical synthesis, water jet technology, rock crushing, food processing, equipment cleaning, energy exploration and the like. The ultra high pressure pump is a power source of the ultra high pressure equipment, which determines the technical level of the ultra high pressure equipment. According to the difference of motion conversion mechanisms at power ends of ultrahigh pressure pumps, the ultrahigh pressure pumps are mainly divided into: crankshaft link type ultra high pressure pump, for example, document:ultrahigh pressure water hydraulic pump in Zhangguxian shale gas development [J]Fluid drive and control, 2017(5)(ii) a Ball screw type ultra high pressure pump, for example, chinese patent application No. CN 103154532A discloses an ultra high pressure pump using rollersBall screw type motion conversion technology; and cartan type ultra high pressure pumps, for example, documents:zhangguxian Kadan type plunger pump (J)]Fluid drive and control, 2017(6). The ultrahigh pressure pumps with different structural forms have limitations, for example, the crankshaft connecting rod type ultrahigh pressure pump has large volume, the connecting rod and the crosshead are easy to wear and have high failure rate, and the lifting of the output pressure of the pump is limited by the pressure bearing capacity of the connecting rod and the crankshaft; the ball screw type ultra high pressure pump has a limited transfer force.

Disclosure of Invention

The invention aims to provide a cam slider type plunger pump to solve the technical limitation problem in the conventional ultrahigh-pressure pump. The invention has the advantages of large supporting force, flexible movement, extremely small friction coefficient and the like.

A cam slider type plunger pump comprises a plunger-piston set, a cylinder barrel, a transmission bearing seat, a high-pressure pump hydraulic end, a cam slider set and a low-pressure oil supply system, wherein the cylinder barrel consists of three sections of coaxial cylinders with successively decreasing inner diameters, and the plunger-piston set is arranged inside the cylinder barrel; the transmission bearing seat is fixed at the upper part of the cylinder barrel, the cam slider group is fixed on the transmission bearing seat, and the cam slider group is in contact with the plunger-piston group; the hydraulic end of the high-pressure pump is connected to the lower end of the cylinder barrel, and the low-pressure oil supply system is connected with the hydraulic end of the high-pressure pump.

Compared with the prior art, the invention has the following remarkable advantages:

(1) because the cam group is contacted with the piston wheel groove through the needle roller sliding block, the supporting force is large, the movement is flexible, and the linear contact between the cam bearing and the end surface of the piston is avoided.

(2) Because the sliding block rolls in the piston groove through the roller pin, the friction coefficient is extremely low, and the action of lateral force vertical to the axial direction of the piston is reduced.

(3) The invention reduces the action of lateral force vertical to the axial direction of the piston, thereby reducing the friction and the abrasion between the piston and the plunger sealing mechanism and improving the sealing reliability.

(4) Because the plunger cylinder and the piston cylinder can be fixedly connected and then finish machined, the concentricity is good, the plunger-piston group and the cylinder can be easily and repeatedly installed, and the problem of difficult repeated positioning in the prior art is solved.

(5) The crankshaft connecting rod type ultrahigh pressure pump in the prior art is complex in crankshaft shape and stress, so that fatigue is easily caused by stress concentration.

(6) The invention adopts a low-pressure oil supply system, so that oil can be fully supplied to the system, the plunger-piston group can be pushed to automatically return, and return force does not need to be additionally applied to the plunger-piston group, so that the whole pump set has a compact and reliable structure.

(7) The plunger pump in the prior art adopts a sliding shoe structure, the oil film pressure-bearing capacity between the sliding shoe and the plunger is limited, the high-pressure oil pumping capacity is difficult to realize, and the problems caused by a sliding shoe mechanism are avoided.

(8) The invention transmits the motion and force between the high-pressure plunger piston group and the low-pressure plunger piston group through the pressure transmission medium, thereby reducing the overall weight of the pump, saving the material and increasing the assembly flexibility.

Drawings

FIG. 1 is a cross-sectional view of a cam slider ultra high pressure pump.

FIG. 2 is a sectional view of a cam slider ultra high pressure pump taken along plane A-A.

Fig. 3 is a sectional view of the stepped shaft.

1-1-high pressure end plunger; 1-2-high pressure end piston; 2-a plunger cylinder; 2-1-plunger cylinder air hole; 3-1-low pressure end plunger; 3-2-low pressure end piston; 4-a piston cylinder; 4-1-piston cylinder air hole; 5-pressure transmission medium; 6-a transmission bearing seat; 7-1-three-way oil way; 7-2-high pressure check valve; 7-3-low pressure check valve; 8-a cam slider group; 9-low pressure oil supply system; 3-3-slider slot; 6-1-bearing seat mounting hole; 7-high pressure pump hydraulic end; 8-1-cam; 8-2-needle bearing; 8-3-sliding block; 8-4-linear bearings; 8-5-a drive shaft; 8-6-drive bearing;

Detailed Description