CN102022301A - Three camshafts for large flow high pressure constant flow pump - Google Patents

Abstract

The invention discloses a three-cam shaft for a high-flow high-pressure constant-flow pump, which is provided with a shaft (1) and is characterized in that: three cams (2) with the same curve are fixed on the shaft (1), the angles of the three cams (2) sequentially differ by 120 degrees, the lift angle of each cam is 240 degrees, the return angle is 120 degrees, and the lift is 13 mm. The cam shaft continuously rotates, two cams are always ensured to be in a lift state, one cam is in a return state, the overlapped data of the two cams in the lift are ensured to be uniformly increased, a compensation area is added in an alternating angle area between the cams, the liquid conveying fluctuation caused by the alternation of the cams is offset, and the performance is stable; the pump head can simultaneously have two plunger rods to output liquid, the problems of high requirement on the rotating speed of a motor, large requirement on the diameter of the plunger, difficult processing and the like are solved, the processing is simple, and the manufacturing cost can be reduced.

Description

Three camshafts for large flow high pressure constant flow pump

Technical field:

The invention relates to a camshaft for a constant-flow pump, in particular to a three-camshaft for a high-flow high-pressure constant-flow pump with simple structure, easy processing, low cost and reliable performance.

Background technique:

High-pressure constant-flow pumps have the advantages of stable flow and high pressure. At present, parallel double-camshaft pumps are widely used, that is, two cams with the same curve are fixed on the power shaft, and the angle difference between the two cams is 180°. Both the stroke angle and the return angle are 180°. When working, the motor drives the double cam shafts to rotate, and converts the rotational potential energy of each cam into linear motion kinetic energy, thereby respectively driving the two plunger rods of the pump head to complete the high-pressure constant-current infusion process. However, when the flow rate reaches a certain value, the liquid output speed of the single plunger is bound to be greatly increased, which can only be achieved by increasing the motor speed or increasing the diameter of the plunger rod, resulting in difficulty in motor selection, high cost and poor plunger rod performance. Difficulty in processing, etc.

Invention content:

The present invention aims to solve the above-mentioned technical problems existing in the prior art, and provides a three-camshaft for a high-flow high-pressure constant-flow pump with simple structure, easy processing, low cost and reliable performance.

The technical solution of the present invention is: a three-camshaft for a large-flow high-pressure constant-flow pump, with a shaft 1, which is characterized in that three cams 2 with the same curve are fixed on the shaft 1, and the angles of the three cams 2 are sequentially different by 120° °, the lift angle of each cam is 240°, the return angle is 120°, and the lift is 13mm.

The parallel three camshafts used in the present invention, the camshafts continue to rotate, always ensure that two cams are in the lift state, and one cam is in the return state, ensuring that the superimposed data of the two cams of the lift is evenly increased and in the alternating angle area between the cams Increase the compensation area to offset the fluctuation of the conveyed liquid caused by the alternation of the cams, and the performance is stable; the pump head can have two plunger rods to output liquid at the same time, which solves the problems of high motor speed, large plunger diameter, and difficult processing. Simple, can reduce manufacturing cost.

Description of drawings:

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

FIG. 2 is a side view of FIG. 1 .

Detailed ways:

The specific implementation manner of the present invention will be described below with reference to the accompanying drawings. As shown in Figures 1 and 2: there is the same shaft 1 as the prior art, and three cams 2 with the same curve are fixed on the shaft 1. The angles of the three cams 2 differ by 120° in turn, and the lift angle of each cam is 240°. , The return angle is 120°, and the lift is 13mm.

The three cam curves are as follows. In the table, D1, D2, and D3 are the diameters of the three cams at the same angle, and each point is connected smoothly:

Claims (1)

1. big-flow high-pressure constant flow pump three camshafts have axle (1), it is characterized in that: be fixed with three cams (2) that curve is identical on axle (1), three cams (2) angle differs 120 ° successively, 240 ° of the lift angles of each cam, 120 ° of backhaul angles, lift 13mm.

Images