CN2209226Y

CN2209226Y - Hydraulic pulp pump

Info

Publication number: CN2209226Y
Application number: CN 94230260
Authority: CN
Inventors: 陈锦生; 马清泉; 黄晓光; 孙荣权
Original assignee: SHENYANG POLYTECHNICAL PROFESSIONAL COLLEGE
Current assignee: SHENYANG POLYTECHNICAL PROFESSIONAL COLLEGE
Priority date: 1994-09-21
Filing date: 1994-09-21
Publication date: 1995-10-04
Anticipated expiration: 2004-09-21

Abstract

The utility model relates to a hydraulic pulp pump which is characterized in that a reversing device uses a distribution type reversing valve composed of a rotor shaft, an oil distribution disk, an upper valve body, a lower valve body, oil supply ports, a high pressure oil port and a low pressure oil port. The oil distribution disk installed on the rotor shaft alternately distributes high pressure oil and low pressure oil to each oil supply port arranged on the upper valve body to cause an oil cylinder connected with the oil supply ports to move alternately and eliminate the flow capacity and the pressure pulsation in the delivery conduit. The distribution type reversing valve can adjust the flow capacity of the delivery conduit.

Description

Hydraulic pulp pump

The utility model relates to a kind of Slurry Pipeline Transportation equipment, particularly hydraulic pressure thick fluid pump.

In existing thick fluid pump, reversing arrangement wherein has two kinds, and the one, the mechanical switching valve is mainly brace and connecting rod framework; The one, the hydraulic type selector valve mainly adopts solenoid valve or electro hydraulic valve to commutate.These two kinds of reversing modes when the piston in the oil cylinder when a certain direction moves to terminal point, can produce instantaneous flow is zero phenomenon, thereby cause the flow and the pressure pulsation of conveyance conduit, the pulsation of this flow and pressure can be shortened the working life of relevant parts greatly, and influences the flowing state of pipeline.For this reason, the existing pulsation of all adopting devices such as energy storage jar to absorb flow and pressure, but this can only alleviate and can not fundamentally eliminate pulsation.In addition, mechanical switching valve and hydraulic type selector valve do not have flow regulating function, can only realize by changing rotating speed of motor if will regulate flow, and the scope of regulating motor speed is limited, and the rotating speed of slave equipment is fixed again sometimes, and therefore, these two kinds of pumps are metering pump basically.

The purpose of this utility model provides a kind ofly can eliminate the hydraulic pressure thick fluid pump that flow and pressure pulsation phenomenon in the conveyance conduit can be realized Flow-rate adjustment again.

For achieving the above object, solution of the present utility model is: a kind of hydraulic pressure thick fluid pump that comprises oil pump, reversing arrangement, oil cylinder, isolation tank, one-way valve, its reversing arrangement adopts the distribution type selector valve, and this distribution type selector valve is made up of rotor, stator and end cap; Rotor comprises rotor shaft, oil distribution casing, slider, rotor shaft by Bearing Installation in stator inner hole, and seal with end cap, slider and oil distribution casing are installed on the rotor shaft respectively, and slider is installed near end cap one side, and oil distribution casing is the annular solid that one at least four above even number dividing plates are divided into the respective numbers cavity, each cavity is an end capping, one end opening, and the opening direction of adjacent cavities is opposite, has a looping pit on each cavity and the contacted annular wall of stator inner hole wall; Stator is made up of upper valve body and following valve body, upper valve body is provided with a high pressure hydraulic fluid port between slider and oil distribution casing, between oil distribution casing and following valve body, be provided with a low pressure hydraulic fluid port, be arranged with logical hydraulic fluid port with the corresponding position of the looping pit of oil distribution casing is first-class, following valve body is provided with logical port connection, and its corresponding logical port connection of logical hydraulic fluid port communicates through the intercommunicating pore in the upper and lower valve body.

In order to make bearing be in low-pressure state, have an intercommunicating pore in the above-mentioned rotor shaft, the outlet in this hole communicates with cavity between cavity, oil distribution casing and the following valve body between slider and the end cap in the stator cavity respectively.

In order to make design more reasonable, the quantity of logical hydraulic fluid port is that the twice of oil distribution casing upper clapboard number is good on the above-mentioned upper valve body.A logical port connection of a pair of logical hydraulic fluid port that is 180 ° of distributions on the upper valve body and following valve body communicates through the intercommunicating pore in the valve body up and down.

The design principle of this commutation type distributing valve is: oil pump injects bore of stator with high pressure oil by the high pressure hydraulic fluid port, and be full of opening in the oil distribution casing isolation cavity of high pressure hydraulic fluid port, this isolation cavity just becomes high pressure oil area, high pressure oil then the looping pit by oil distribution casing enter into the corresponding logical hydraulic fluid port of looping pit in, be injected in the cylinder body through intercommunicating pore, logical port connection, promote cylinder piston motion.The low pressure oil of the oil cylinder then looping pit of the oil distribution casing of the logical port connection of process, intercommunicating pore, logical hydraulic fluid port is injected into opening in the oil distribution casing isolation cavity of following valve body, and this isolation cavity just becomes the low pressure oil district, and the oil in low pressure oil district is failed oil sump tank through the low pressure hydraulic fluid port again.When rotor rotation, the logical hydraulic fluid port on the stator all will alternately pass through high pressure oil area and low pressure oil district, and the piston of oil cylinder also will move back and forth thereupon.Because which angle no matter rotor forward to, the logical hydraulic fluid port on the stator has at least two pairs to be in high pressure oil area and low pressure oil district respectively, and like this, even there is the piston of one or several oil cylinder to be in the dead center position, and other oil cylinder is still in running.Owing to the high pressure flow that enters into the distribution type selector valve from oil pump is a certain value, the high pressure oil flow sum that then is injected into oil cylinder is constant again, and therefore, flow in the conveyance conduit and pressure also will be certain values.

The utility model is compared with prior art has following advantage:

1, because reversing arrangement adopts the distribution type selector valve, the special construction that matches by rotor, stator, thereby guaranteed on-streamly have at least the piston of an oil cylinder not to be in the dead center position, and the high pressure oil flow sum that injects oil cylinder is constant, has therefore eliminated the pulse of flow and pressure in the conveyance conduit.

2, the oil pump as power source is a variable displacement pump, and a fixing ratio relation (this ratio is two areas ratios of oil cylinder) is arranged between the flow of this pump and the flow of slurry body.The rotating speed of distribution type selector valve and the flow of oil pump have a corresponding relation, and the oily flow (being the movement velocity of oil cylinder) that enters oil cylinder is subjected to the control of distribution type selector valve rotating speed.Like this, as long as regulate the flow of oil pump, the rotating speed of distribution type selector valve changes thereupon, and the movement velocity of oil cylinder also and then changes, and the plasma discharge amount corresponding with oil pump flow also determined thereupon, so the distribution type selector valve plays the effect of regulating flow.

Below in conjunction with accompanying drawing the utility model is further described.

Fig. 1 is a principle schematic of the present utility model

Fig. 2 is the structural representation of distribution type selector valve;

Fig. 3 is Fig. 2 E-E and G-G cross section cut-away view;

Fig. 4 is Fig. 2 H-H cross section cut-away view;

Fig. 5 is the stereogram of rotor.

See Fig. 1, the utility model comprises oil pump 5, relief valve 6, distribution type selector valve 1, oil cylinder 2, isolation tank 3, one-way valve 4.Key problem in technology of the present utility model is the design of distribution type selector valve 1, so following emphasis is described the structure of distribution type selector valve 1.

See Fig. 2, distribution type selector valve 1 mainly is made up of rotor, stator and end cap 8.Rotor comprises rotor shaft 7, oil distribution casing 10, slider 9.One end of rotor shaft 7 is installed in the stator inner hole by bearing 13, and the other end of rotor shaft 7 links to each other with motor.End cap 8 is connected with stator by bolt.Slider 9, oil distribution casing 10 are installed in respectively on the rotor shaft 7, and slider 9, oil distribution casing 10 are to be installed on the rotor shaft 7 with welding method in this example, and rotate with rotor shaft 7.Slider 9 is installed near end cap one side, and the end face that slider 9 contacts with the stator inner hole wall also has sealed groove.Referring to oil distribution casing 10 in Fig. 3 and this example of Fig. 5 is the annular solid that 4 dividing plates 22 are divided into 4 cavitys, each cavity all is an end capping, one end opening, and two adjacent cavity opening directions are opposite, have a looping pit 18 on the contacted annular wall 19 of each cavity and stator.Have sealed groove between annular wall 19 and the stator inner hole wall.Have one in the rotor shaft 7 and be communicated with 20, the outlet of this intercommunicating pore 20 respectively with slider 9 and end cap 8 between cavity, oil distribution casing 10 and bearing 13 between cavity and the cavity between bearing 13 and the stator bottom (promptly descending valve body 17) communicate, its effect is in order to make bearings at both ends be in low-pressure state.Stator comprises upper valve body 12, following valve body 17 and base plate 16.See Fig. 4, upper valve body 12 is provided with a high pressure hydraulic fluid port 23 between slider 9 and oil distribution casing 10.See Fig. 3, upper valve body 12 is provided with a low pressure hydraulic fluid port 21 between oil distribution casing 10 and bearing 13.See Fig. 2, Fig. 3, upper valve body 12 is being arranged with 8 logical hydraulic fluid ports 11 with the looping pit 18 corresponding positions of oil distribution casing 10 are first-class, and the quantity of logical hydraulic fluid port 11 is designed to the twice of dividing plate 22 numbers of oil distribution casing 10.One end of following valve body 17 links to each other with upper valve body 12, and the other end is connected with base plate 16.Following valve body 17 is provided with 4 logical port connections 15, and a pair of logical hydraulic fluid port 11 that is 180 ° of distributions on the upper valve body 12 communicates through the intercommunicating pore 14 in upper valve body 12 and the following valve body 17 with a logical port connection 15 of following valve body 17.

Sketch the utility model work operation process in conjunction with Fig. 1 and Fig. 2 again.In this example, the utility model comprises 3,8 one-way valves 4 of 2,4 isolation tanks of 1,2 oil cylinders of 6,1 distribution type selector valve of 5,1 relief valve of 1 oil pump.Each oil cylinder 2 links to each other with two logical port connections 15 of distribution type selector valve 1, links to each other with 2 isolation tanks 3 again.When the high pressure oil of oil pump 5 is injected into distribution type selector valve 1, alternately high pressure oil is distributed to each logical hydraulic fluid port 11 through oil distribution casing 10, make the also corresponding alternately motion of the oil cylinder 2 that connects these logical hydraulic fluid ports 11,, also have other oil cylinder in work even when a certain oil cylinder is in the dead center position.The corresponding work that drives isolation tank of the motion of oil cylinder 2, thus reach the purpose of line transportation slurry.

Claims

1, a kind of hydraulic pressure thick fluid pump comprises oil pump, reversing arrangement, oil cylinder, isolation tank, one-way valve, it is characterized in that: reversing arrangement adopts the distribution type selector valve, and this distribution type selector valve is made up of rotor, stator and end cap; Rotor comprises rotor shaft, oil distribution casing, slider, rotor shaft by Bearing Installation in stator inner hole, and seal with end cap, slider and oil distribution casing are installed on the rotor shaft respectively, and slider is installed near end cap one side, and oil distribution casing is the annular solid that one at least four above even number dividing plates are divided into the respective numbers cavity, each cavity is an end capping, one end opening, and the opening direction of adjacent cavities is opposite, has a looping pit on each cavity and the contacted annular wall of stator inner hole wall; Stator is made up of upper valve body and following valve body, upper valve body is provided with a high pressure hydraulic fluid port between slider and oil distribution casing, between oil distribution casing and following valve body, be provided with a low pressure hydraulic fluid port, be arranged with logical hydraulic fluid port with the corresponding position of the looping pit of oil distribution casing is first-class, following valve body is provided with logical port connection, and its corresponding logical port connection of logical hydraulic fluid port communicates through the intercommunicating pore in the upper and lower valve body.

2, hydraulic pressure thick fluid pump according to claim 1 is characterized in that: have an intercommunicating pore in the described rotor shaft, the outlet in this hole communicates with cavity between cavity, oil distribution casing and the following valve body between slider and the end cap in the stator cavity respectively.

3, hydraulic pressure thick fluid pump according to claim 1 is characterized in that: the quantity of logical hydraulic fluid port is the twice of oil distribution casing upper clapboard number on the described upper valve body.

4, hydraulic pressure thick fluid pump according to claim 3 is characterized in that: a pair of logical hydraulic fluid port that is 180 ° of distributions on the described upper valve body communicates through the intercommunicating pore in the upper and lower valve body with a logical port connection of following valve body.