CN216278324U - Venturi ejector type hydraulic pump with large discharge capacity - Google Patents

Abstract

The utility model discloses a large-displacement Venturi ejector type hydraulic pump device, which comprises a one-way valve, a transmission device, an oil tank and a Venturi ejector device, wherein the one-way valve is arranged in a path and used for preventing oil from flowing back; the transmission device comprises a cylinder body, a spring plunger and a cam mechanism, wherein the cylinder body is used for storing oil, and the cam mechanism rotates circularly so as to drive the spring plunger to reciprocate in the cylinder body and further enable the oil to enter the cylinder body from an oil tank; the venturi injection device comprises a diffusion chamber, a mixing chamber, a suction chamber, a nozzle, a liquid inlet, a liquid outlet, a check valve and an oil tank, wherein oil enters the venturi injection device from the nozzle, under the action of pressure difference, the oil in the oil tank enters the suction chamber through the check valve, contacts with the oil at the nozzle in the suction chamber to reach the mixing chamber for mixing, and is discharged from the diffusion chamber.

Description

A Large Displacement Venturi Ejector Hydraulic Pump

technical field

The utility model relates to the hydraulic field, in particular to a large-displacement venturi ejector type hydraulic pump device.

Background technique

With the rapid development of science and technology and the increase of large-scale installations and machines, hydraulic drives have been widely used. At the same time, with the continuous improvement of people's demand for hydraulic performance and the continuous expansion of the scale of hydraulic pumps, the standard of displacement and pressure has been improved. Hydraulic performance is particularly important.

First of all, the hydraulic pump, as the driving element of the hydraulic system, is driven by a motor or generator to suck up the oil from the oil tank, form hydraulic oil and discharge it, and then send it to the actuators such as hydraulic cylinders and hydraulic motors; the hydraulic system is a mechanical system. The hydraulic components play an important role in the machinery, so the performance of the hydraulic components will directly determine the performance of the overall mechanical structure. Among them, the hydraulic pump is a very important driving element in the hydraulic system, and is widely used in the hydraulic system of various construction machinery, so the performance of the hydraulic pump will directly determine the working performance of the construction machinery.

However, due to too many types of hydraulic pumps, the manufacturing method and processing technology of hydraulic pumps are very complicated, and the performance of hydraulic pumps is mainly reflected in the three aspects of pressure, displacement and power, of which displacement has a very important position. The displacement of the hydraulic pump refers to the volume of liquid that the hydraulic pump can output per revolution. At present, large-displacement hydraulic pumps are relatively scarce in my country, and large-displacement hydraulic pumps will also be accompanied by high-power loss and oil. phenomenon of leakage.

Based on this, it is urgent to develop a hydraulic pump to increase the displacement of the hydraulic pump.

Utility model content

In order to increase the displacement of the hydraulic pump, thereby improving the working performance of the hydraulic transmission system, the utility model proposes a large-displacement Venturi ejector hydraulic pump.

The technical scheme adopted by the utility model to solve the technical problem is as follows: a large-displacement Venturi injector hydraulic pump, including an oil tank, a check valve, a transmission device, and a Venturi injection device, wherein there are two oil tanks, a single There are three direction valves; the spring plunger is driven to reciprocate through the cam structure to realize the oil suction and discharge process of the hydraulic pump, and then the oil tank is sucked in through the pressure difference at the nozzle, thereby increasing the outlet oil displacement.

Preferably, the three one-way valves are common check valves, which are composed of an oil inlet and an oil outlet, and prevent the oil from flowing back in the hydraulic system.

Preferably, the two oil tanks provide oil for the device, one sucks oil through the transmission device, and the other sucks oil again and mixes with crude oil under the action of the pressure difference in the venturi injection device.

Preferably, the transmission is composed of a cam mechanism, a spring plunger and a cylinder to provide power for the system.

Preferably, the venturi injection device is composed of a venturi injector, a one-way valve and a fuel tank, and the venturi injector is an inactive component, thereby improving the sealing performance of the system.

Preferably, the Venturi injector is composed of a diffusion chamber, a mixing chamber, a suction chamber and a nozzle, and a pressure difference is formed by the rapid flow of oil at the nozzle, and the oil is pressed into the mixing chamber from the suction chamber and mixed and discharged.

The beneficial effect of the utility model is that the structure is relatively simple, the displacement of the hydraulic pump is increased, the working performance of the pressure pump is improved, the practicability is strong, the sealing performance is good, and the green oil absorption can be realized.

Description of drawings

The utility model will be further described below in conjunction with the accompanying drawings and embodiments.

Figure 1 is a schematic diagram of the overall structure of a large-displacement Venturi injector hydraulic pump of the present invention.

FIG. 2 is a schematic diagram of the structure of the Venturi injection device of the present invention.

In the picture, one-way valve, 20 transmission device, 30 one-way valve, 40. fuel tank, 50. Venturi injection device.

Detailed ways

The present utility model will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

As shown in Figure 1 and Figure 2, the utility model proposes a large displacement venturi injector hydraulic pump, which is mainly composed of a one-way valve 10 and a one-way valve 30, a transmission device 20, a fuel tank 40, and a venturi injection device. 50 components, the one-way valve 10 and the one-way valve 30 are in the same path to prevent the backflow of oil; the transmission device includes a cylinder block 201, a spring plunger 202, and a cam mechanism 203. The cylinder block 201 is used to store oil, and the cam The mechanism 203 rotates cyclically to drive the spring plunger 202 to reciprocate in the cylinder 201, and then suck oil from the cylinder to provide power for the system; the venturi injection device includes a diffusion chamber 501, a mixing chamber 502, and a suction chamber 503, nozzle 504, liquid inlet 505, liquid outlet 506, liquid inlet 507, one-way valve 508, oil tank 509, the oil enters from the venturi injection device 50, under the action of the pressure difference, the oil in the oil tank 509 passes through The one-way valve 508 enters the suction chamber 503 , is mixed with the oil at the nozzle 504 , and then reaches the mixing chamber 502 , and is discharged from the diffusion chamber 501 .

In a specific embodiment of the present invention, the working oil enters the mixing chamber 502 from the horizontal direction through the nozzle 504. When entering the mixing chamber 502, the working oil has a relatively high pressure and flow rate. When it comes out of the nozzle 504, the flow rate increases sharply. , so that the working oil produces a low pressure area around the nozzle 504. Since the pressure of the oil ejected from the liquid inlet 507 is lower than the low pressure generated by the nozzle, according to Bernoulli's equation, the oil flows from the place with high pressure to the place with low pressure. It moves in place, and under the action of the pressure difference, the oil is ejected and entrained into the suction chamber 503. In the suction chamber 503, the working oil and the ejected oil are combined, and the mixing and energy exchange are completed in the mixing chamber 3. In the diffusion chamber 501, the flow rate of the mixed fluid in the diffusion chamber 501 decreases, the pressure increases, and the liquid is discharged from the liquid outlet 506 after the pressure is higher than the atmospheric pressure.

In a specific embodiment of the present invention, the cam mechanism 203 rotates cyclically to drive the spring plunger 202 to reciprocate in the cylinder 201, so that the volume of the cylinder 201 changes, and then the oil is sucked from the oil tank 40. It is sucked up from the oil tank 40 , passes through the one-way valve 30 , the transmission device 20 and the one-way valve 10 , forms oil and then discharges it, and then sends it to the venturi injection device 50 .

In a specific embodiment of the present invention, the venturi injection device 50 and the transmission device 20 are connected in series by a pipeline, a one-way valve 10 is arranged at the connection, and the cam mechanism 203 rotates cyclically to drive the spring plunger 202 to the cylinder 201 Reciprocating movement inside the cylinder 201 makes the volume of the cylinder 201 change, and then the oil is sucked from the oil tank 40, the oil is sucked up from the oil tank 40, and the oil is formed through the check valve 30, the transmission device 20 and the check valve 10. It is discharged and then sent to the venturi injection device 50. In the venturi injection device 50, the oil flow rate increases when it passes through the nozzle 504, so a negative pressure will be generated in the suction chamber 503, and this negative pressure will cause the oil in another oil tank 509 to enter through the liquid inlet 507. The suction chamber 503 is simultaneously discharged through the mixing chamber 502, the diffusion chamber 501 and the liquid outlet 506 to complete the secondary suction of the oil and increase the displacement of the hydraulic pump.

In addition, the overall structure of the device is simple, and the disassembly and assembly are convenient.

So far, with the continuous development of the industrialization level and the continuous expansion of the industrial scale, new requirements have been put forward for the displacement of the hydraulic pump. Through the static mixer of the Venturi ejector, the secondary absorption and discharge of the oil can be perfectly realized. The amount of oil increases, and there is no waste of energy due to the use of movable components, thereby achieving green absorption of oil.

Claims (3)

1. A large-displacement Venturi ejector type hydraulic pump is characterized by comprising a one-way valve, a transmission device, an oil tank and a Venturi ejector device, wherein the one-way valve is arranged in a path and used for preventing oil from flowing back; the transmission device comprises a cylinder body, a spring plunger and a cam mechanism, wherein the cylinder body is used for storing oil, the cam mechanism rotates circularly so as to drive the spring plunger to reciprocate in the cylinder body, and an oil tank is sucked into the cylinder body from an oil tank; the venturi injection device comprises a diffusion chamber, a mixing chamber, a suction chamber, a nozzle, a liquid inlet, a liquid outlet, a one-way valve and an oil tank, wherein oil enters the venturi injection device from the nozzle, under the action of pressure difference, the oil in the oil tank enters the suction chamber through the one-way valve, contacts with the oil at the nozzle, enters the mixing chamber to be mixed, and is discharged from the diffusion chamber.

2. A large displacement venturi ejector type hydraulic pump according to claim 1, wherein the transmission means comprises a cam mechanism, a spring plunger, and a cylinder, the cam mechanism rotates cyclically, and the spring plunger reciprocates in the cylinder.

3. A large displacement venturi ejector type hydraulic pump according to claim 2, wherein the venturi ejector means comprises a venturi ejector, a check valve and an oil tank; the venturi ejector is an inactive component and comprises a diffusion chamber, a mixing chamber, a suction chamber and a nozzle, the venturi ejector device is connected with the transmission device, a one-way valve is arranged at the joint, the transmission device is connected with the oil tank, the one-way valve is arranged at the joint, the venturi ejector device is connected with the oil tank, and the one-way valve is arranged at the joint.

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