阅读说明：本技术 一种排量可调的泵 (Pump with adjustable displacement ) 是由 任林赟 赵爱红 于 2021-01-19 设计创作，主要内容包括：本发明涉及一种排量可调的泵,所述排量可调的泵包括：泵壳、双齿圈、主动齿轮、半月瓣、第一从动齿轮、第二从动齿轮。本发明的优点在于：通过设置半月瓣、主动齿轮、第一从动齿轮、第二从动齿轮、双齿圈以及调控盘,主动齿轮与双齿圈的内齿圈啮合,双齿圈的外齿圈与第一从动齿轮以及第二从动齿轮啮合,通过控制调控盘可以分别控制第一出油腔、第二出油腔和第三出油腔或者与进油口连通或者与出油口连通,从而可以实现多级的排量改变,实现了变量,扩大了泵的应用范围；且本发明结构简单、合理、制造成本低,且因为采用多个齿轮啮合输出流量,可以显著降低流量脉动及噪声。(The invention relates to a pump with adjustable displacement, which comprises: pump case, double-tooth ring, driving gear, semilunar valve, first driven gear, second driven gear. The invention has the advantages that: by arranging the half-moon flap, the driving gear, the first driven gear, the second driven gear, the double-tooth ring and the regulating and controlling disc, the driving gear is meshed with the inner gear ring of the double-tooth ring, the outer gear ring of the double-tooth ring is meshed with the first driven gear and the second driven gear, and the first oil outlet cavity, the second oil outlet cavity and the third oil outlet cavity can be respectively controlled or communicated with the oil inlet or the oil outlet by controlling the regulating and controlling disc, so that multi-stage displacement change can be realized, the variable is realized, and the application range of the pump is expanded; the invention has simple and reasonable structure and low manufacturing cost, and can obviously reduce flow pulsation and noise because a plurality of gears are adopted to mesh and output flow.)

1. An adjustable displacement pump, comprising:

the pump comprises a pump shell, a first oil inlet, a second oil outlet, a central cavity, a first cavity and a second cavity, wherein the pump shell is provided with the oil inlet and the oil outlet;

the double gear rings are rotatably arranged in the central cavity and are attached to the inner wall of the central cavity, and each double gear ring is provided with an outer gear ring and an inner gear ring;

the driving gear is rotatably arranged on the pump shell and is positioned on the inner side of the double gear ring, and the driving gear is meshed with the inner gear ring of the double gear ring;

the half-moon flap is fixedly arranged on the pump shell and is positioned on the inner side of the double-tooth ring, the outer side of the half-moon flap is attached to the inner gear ring, and the inner side of the half-moon flap is attached to the outer side of the driving gear, so that a third oil inlet cavity is formed on the left side of the driving gear and the left side of the inner gear ring, and a third oil outlet cavity is formed on the right side of the driving gear and the inner gear ring;

the first driven gear is rotatably arranged on the pump shell and is positioned in the first containing cavity, the first driven gear is tightly attached to the inner wall of the first containing cavity, the first driven gear is meshed with the outer gear ring of the double gear ring, a first oil inlet cavity is formed on the right side of the meshing position, and a first oil outlet cavity is formed on the left side of the meshing position;

the second driven gear is rotatably arranged on the pump shell and is positioned in the second containing cavity, the second driven gear is tightly attached to the inner wall of the second containing cavity, the second driven gear is meshed with the outer gear ring of the double gear ring, a second oil inlet cavity is formed on the left side of the meshing position, a second oil outlet cavity is formed on the right side of the meshing position,

the pump shell is provided with a first oil inlet channel, a second oil inlet channel, a third oil inlet channel and a fourth oil inlet channel which are communicated with the oil inlet, and a first oil outlet channel, a second oil outlet channel, a third oil outlet channel and a fourth oil outlet channel which are communicated with the regulation cavity, wherein the first oil inlet channel is communicated with the first oil inlet cavity, the second oil inlet channel is communicated with the second oil inlet cavity, the third oil inlet channel is communicated with the third oil inlet cavity, the first oil outlet channel is communicated with the first oil outlet cavity, the second oil outlet channel is communicated with the second oil outlet cavity, the third oil outlet channel is communicated with the third oil outlet cavity, the regulation cavity is rotatably connected with a regulation and control disc, the pump shell is fixedly provided with a control motor, the control motor can control the rotation of the regulation and control disc, and the regulation and control disc divides the regulation and control cavity into a first control cavity and a second control cavity, the first control cavity is communicated with the oil inlet through the fourth oil inlet channel, the second control cavity is communicated with the oil outlet through the fourth oil outlet channel, the regulation and control disc is provided with six working positions comprising a first working position, a second working position, a third working position, a fourth working position, a fifth working position and a sixth working position,

when the adjusting and controlling disc is located at a first working position, the first oil outlet channel, the second oil outlet channel and the third oil outlet channel are communicated with the second control cavity;

when the adjusting and controlling disc is located at a second working position, the first oil outlet channel and the second oil outlet channel are communicated with the second control cavity, and the third oil outlet channel is communicated with the first control cavity;

when the adjusting and controlling disc is located at a third working position, the first oil outlet channel is communicated with the second control cavity, and the second oil outlet channel and the third oil outlet channel are communicated with the first control cavity;

when the adjusting and controlling disc is located at a fourth working position, the first oil outlet channel is communicated with the first control cavity, and the second oil outlet channel and the third oil outlet channel are communicated with the second control cavity;

when the adjusting and controlling disc is located at a fifth working position, the first oil outlet channel and the second oil outlet channel are communicated with the first control cavity, and the third oil outlet channel is communicated with the second control cavity;

when the adjusting and controlling disc is located at a sixth working position, the first oil outlet channel, the second oil outlet channel and the third oil outlet channel are communicated with the first control cavity.

2. A displacement-adjustable pump according to claim 1, wherein the regulating disc is provided with a connecting passage, and the connecting passage communicates the second control chamber with the fourth oil outlet passage.

3. A variable displacement pump in accordance with claim 1, wherein the drive gear is fixedly coupled to a first shaft that is rotatably coupled to the pump housing.

4. A variable displacement pump according to claim 3, wherein the first driven gear is fixedly connected to a second rotatable shaft, the second rotatable shaft being rotatably connected to the pump housing.

5. A variable displacement pump according to claim 4, wherein the second driven gear is fixedly connected to a third rotatable shaft, the third rotatable shaft being rotatably connected to the pump housing.

Technical Field

The invention relates to the field of pumps, in particular to a pump with adjustable displacement.

Background

Gear pumps are rotary pumps that deliver or pressurize fluid by virtue of the change in working volume and movement created between a pump cylinder and a meshing gear. Two gears, a pump body and front and rear covers form two closed spaces, when the gears rotate, the volume of the space on the gear disengagement side is changed from small to large to form vacuum, liquid is sucked in, and the volume of the space on the gear engagement side is changed from large to small to squeeze the liquid into a pipeline; the advantages are that: the structure is simple, the volume is small, the weight is light, the number of parts is small, the manufacturability is good, the manufacture is easy, the maintenance is convenient, the price is low, and the self-absorption performance is good; the device is insensitive to the pollution of oil, is not easy to be seized or blocked in the working engineering, and can convey high-viscosity oil and fluid with large consistency. However, gear pumps also have the following disadvantages: large flow and pressure pulsation, large noise, low high-temperature efficiency, invariable discharge capacity and the like. Wherein the non-variable displacement limits the range of applications of the gear pump to a large extent. The invention provides a pump for solving the problem of variable quantity.

Disclosure of Invention

In view of the above, it is necessary to provide a pump with adjustable displacement, which can adjust the displacement.

The invention discloses a pump with adjustable discharge capacity, which comprises: pump case, double-tooth ring, driving gear, semilunar valve, first driven gear, second driven gear. The pump shell is provided with an oil inlet and an oil outlet, a central cavity, a first cavity and a second cavity are formed in the pump shell, the first cavity and the second cavity are respectively located on two sides of the central cavity and are communicated with the central cavity, and a regulating and controlling cavity is further formed in the pump shell; the double gear rings are rotatably arranged in the central cavity and are attached to the inner wall of the central cavity, and each double gear ring is provided with an outer gear ring and an inner gear ring; the driving gear is rotatably arranged on the pump shell and is positioned on the inner side of the double gear ring, and the driving gear is meshed with the inner gear ring of the double gear ring; the semilunar valve is fixedly arranged on the pump shell and is positioned on the inner side of the double-tooth ring, the outer side of the semilunar valve is attached to the inner gear ring, the inner side of the semilunar valve is attached to the outer side of the driving gear, so that a third oil inlet cavity is formed on the left side of the driving gear and the left side of the inner gear ring, and a third oil outlet cavity is formed on the right side of the driving gear and the inner gear ring; the first driven gear is rotatably arranged on the pump shell and is positioned in the first containing cavity, the first driven gear is tightly attached to the inner wall of the first containing cavity, the first driven gear is meshed with the outer gear ring of the double gear ring, a first oil inlet cavity is formed on the right side of the meshing position, and a first oil outlet cavity is formed on the left side of the meshing position; the second driven gear is rotatably arranged on the pump shell and is positioned in the second containing cavity, the second driven gear is tightly attached to the inner wall of the second containing cavity, the second driven gear is meshed with the outer gear ring of the double gear ring, a second oil inlet cavity is formed on the left side of the meshing part, a second oil outlet cavity is formed on the right side of the meshing part, a first oil inlet channel, a second oil inlet channel, a third oil inlet channel and a fourth oil inlet channel which are communicated with the oil inlet, and a first oil outlet channel, a second oil outlet channel, a third oil outlet channel and a fourth oil outlet channel which are communicated with the regulating and controlling cavity are arranged on the pump shell, the first oil inlet channel is communicated with the first oil inlet cavity, the second oil inlet channel is communicated with the second oil inlet cavity, the third oil inlet channel is communicated with the third oil inlet cavity, the first oil outlet channel is communicated with the first oil outlet cavity, and the second oil outlet channel is communicated with the second oil outlet cavity, the oil outlet device comprises a pump shell, a first oil outlet channel, a second oil outlet channel, a third oil outlet cavity, a regulation and control disc, a control motor, a fourth oil inlet channel, a fourth oil outlet channel, a fifth working position and a sixth working position, wherein the third oil outlet channel is communicated with the third oil outlet cavity, the regulation and control disc is rotatably connected in the regulation and control cavity, the control motor is fixedly arranged on the pump shell and can control the regulation and control disc to rotate, the regulation and control disc is divided into the first control cavity and the second control cavity, the first control cavity is communicated with the oil inlet through the fourth oil inlet channel, the second control cavity is communicated with the oil outlet through the fourth oil outlet channel, and the regulation and control disc is provided with the six working positions.

When the adjusting and controlling disc is located at a first working position, the first oil outlet channel, the second oil outlet channel and the third oil outlet channel are communicated with the second control cavity;

when the adjusting and controlling disc is located at a second working position, the first oil outlet channel and the second oil outlet channel are communicated with the second control cavity, and the third oil outlet channel is communicated with the first control cavity;

when the adjusting and controlling disc is located at a third working position, the first oil outlet channel is communicated with the second control cavity, and the second oil outlet channel and the third oil outlet channel are communicated with the first control cavity;

when the adjusting and controlling disc is located at a fourth working position, the first oil outlet channel is communicated with the first control cavity, and the second oil outlet channel and the third oil outlet channel are communicated with the second control cavity;

when the adjusting and controlling disc is located at a fifth working position, the first oil outlet channel and the second oil outlet channel are communicated with the first control cavity, and the third oil outlet channel is communicated with the second control cavity;

when the adjusting and controlling disc is located at a sixth working position, the first oil outlet channel, the second oil outlet channel and the third oil outlet channel are communicated with the first control cavity.

In one embodiment, the regulating and controlling disc is provided with a connecting channel, and the connecting channel is communicated with the second control cavity and the fourth oil outlet channel.

The driving gear is fixedly connected with a first rotating shaft, and the first rotating shaft is rotatably connected to the pump shell.

The first driven gear is fixedly connected with a second rotating shaft, and the second rotating shaft is rotatably connected to the pump shell.

The second driven gear is fixedly connected with a third rotating shaft, and the third rotating shaft is rotatably connected to the pump shell.

The invention has the advantages that:

1. the oil pump is provided with a half-moon flap, a driving gear, a first driven gear, a second driven gear, a double-tooth ring and a regulating and controlling disc, wherein the driving gear is meshed with an inner gear ring of the double-tooth ring, an outer gear ring of the double-tooth ring is meshed with the first driven gear and the second driven gear, and a first oil outlet cavity, a second oil outlet cavity and a third oil outlet cavity can be respectively controlled or communicated with an oil inlet or an oil outlet by controlling the regulating and controlling disc, so that multi-stage displacement change can be realized, a variable is realized, and the application range of the pump is expanded;

2. the invention has simple and reasonable structure and low manufacturing cost, and can obviously reduce flow pulsation and noise because a plurality of gears are adopted to mesh and output flow.

Drawings

FIG. 1 is a cross-sectional view of the present invention;

FIG. 2 is a sectional view taken along line A-A of FIG. 1 in accordance with the present invention;

FIG. 3 is a sectional view taken along line B-B of FIG. 1 in accordance with the present invention;

FIG. 4 is an enlarged view taken at I of FIG. 3, with the dial in a first operating position;

FIG. 5 is an enlarged fragmentary view of another operating condition of the present invention according to FIG. 4, with the dial in a second operating position;

FIG. 6 is an enlarged fragmentary view of another operating condition of the present invention according to FIG. 4, with the dial in a third operating position;

FIG. 7 is an enlarged fragmentary view of another operating condition of the present invention according to FIG. 4, with the actuator disk in a fourth operating position;

FIG. 8 is an enlarged fragmentary view of another operating condition of the present invention according to FIG. 4, with the actuator disk in a fifth operating position;

fig. 9 is an enlarged fragmentary view of another operating condition of the present invention according to fig. 4, with the dial in a sixth operating position.

In the drawing, a pump housing 1, an oil inlet 11, an oil outlet 12, a central cavity 13, a first cavity 14, a second cavity 15, a first control cavity 161, a second control cavity 162, a first oil inlet channel 101, a second oil inlet channel 102, a third oil inlet channel 103, a fourth oil inlet channel 104, a first oil outlet channel 105, a second oil outlet channel 106, a third oil outlet channel 107, a fourth oil outlet channel 108, a double-tooth ring 2, an outer tooth ring 21, an inner tooth ring 22, a driving gear 3, a half-moon-shaped lobe 4, a first driven gear 51, a second driven gear 52, a regulating and controlling plate 6, a connecting channel 61, a first rotating shaft 71, a second rotating shaft 72, a third rotating shaft 73, a control motor 8, a first oil inlet cavity 201, a second oil inlet cavity 202, a third oil inlet cavity 203, a first oil outlet cavity 204, a second oil outlet cavity 205 and a third oil outlet cavity 206 are arranged.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It will be understood that when an element is referred to as being "mounted on" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1 to 3, the present invention discloses a variable displacement pump, which includes:

the oil pump comprises a pump shell 1, a first oil inlet 11 and an oil outlet 12, wherein a central cavity 13, a first cavity 14 and a second cavity 15 are formed in the pump shell 1, the first cavity 14 and the second cavity 15 are respectively located on two sides of the central cavity 13 and are communicated with the central cavity 13, and a regulating and controlling cavity is further formed in the pump shell 1;

the double gear rings 2 are rotatably arranged in the central cavity 13 and are attached to the inner wall of the central cavity 13, and each double gear ring 2 is provided with an outer gear ring 21 and an inner gear ring 22;

the driving gear 3 is rotatably arranged on the pump shell 1 and is positioned on the inner side of the double-gear ring 2, and the driving gear 3 is meshed with an inner gear ring 22 of the double-gear ring 2;

the crescent valve 4 is fixedly arranged on the pump shell 1 and is positioned on the inner side of the double-gear ring 2, the outer side of the crescent valve 4 is attached to the inner gear ring 22, the inner side of the crescent valve 4 is attached to the outer side of the driving gear 3, so that a third oil inlet cavity 203 is formed on the left side of the driving gear 3 and the inner gear ring 22, and a third oil outlet cavity 206 is formed on the right side of the driving gear 3 and the inner gear ring 22;

the first driven gear 51 is rotatably arranged on the pump shell 1 and is positioned in the first cavity 14, the first driven gear 51 is tightly attached to the inner wall of the first cavity 14, the first driven gear 51 is meshed with the outer gear ring 21 of the double gear ring 2, a first oil inlet cavity 201 is formed on the right side of the meshing position, and a first oil outlet cavity 204 is formed on the left side of the meshing position;

the second driven gear 52 is rotatably arranged on the pump housing 1 and is positioned in the second cavity 15, the second driven gear 52 is tightly attached to the inner wall of the second cavity 15, the second driven gear 52 is meshed with the outer gear ring 21 of the double gear ring 2, a second oil inlet cavity 202 is formed on the left side of the meshing position, and a second oil outlet cavity 205 is formed on the right side of the meshing position,

the pump shell 1 is provided with a first oil inlet channel 101, a second oil inlet channel 102, a third oil inlet channel 103, a fourth oil inlet channel 104 which are communicated with the oil inlet 11, and a first oil outlet channel 105, a second oil outlet channel 106, a third oil outlet channel 107 and a fourth oil outlet channel 108 which are communicated with the regulation cavity, wherein the first oil inlet channel 101 is communicated with a first oil inlet cavity 201, the second oil inlet channel 102 is communicated with a second oil inlet cavity 202, the third oil inlet channel 103 is communicated with a third oil inlet cavity 203, the first oil outlet channel 105 is communicated with a first oil outlet cavity 204, the second oil outlet channel 106 is communicated with a second oil outlet cavity 205, the third oil outlet channel 107 is communicated with a third oil outlet 206, the regulation cavity is rotationally connected with a regulation and control plate 6, the pump shell 1 is fixedly provided with a control motor 8, and the regulation and control plate 6 can be controlled by the control motor 8, the regulation and control disc 6 divides the regulation and control cavity into a first control cavity 161 and a second control cavity 162, the first control cavity 161 is communicated with the oil inlet 11 through the fourth oil inlet channel 104, the second control cavity 162 is communicated with the oil outlet 12 through the fourth oil outlet channel 108, and the regulation and control disc 6 has six working positions including a first working position, a second working position, a third working position, a fourth working position, a fifth working position and a sixth working position.

Preferably, the control panel 6 is provided with a connecting channel 61, and the connecting channel 61 communicates the second control chamber 162 with the fourth oil outlet channel 108.

Preferably, the driving gear 3 is fixedly connected to a first rotating shaft 71, and the first rotating shaft 71 is rotatably connected to the pump housing 1.

Preferably, the first driven gear 51 is fixedly connected to a second rotating shaft 72, and the second rotating shaft 72 is rotatably connected to the pump housing 1.

Preferably, the second driven gear 52 is fixedly connected to a third rotating shaft 73, and the third rotating shaft 73 is rotatably connected to the pump housing 1.

The working mode of the invention is as follows:

as shown in fig. 4, when the control panel 6 is located at the first working position, the first oil inlet passage 101, the second oil inlet passage 102, and the third oil inlet passage 103 are all communicated with the first control chamber 161, the first oil outlet passage 105, the second oil outlet passage 106, and the third oil outlet passage 107 are all communicated with the second control chamber 162, at this time, the first oil inlet chamber 201 and the first oil outlet chamber 204, the second oil inlet chamber 202 and the second oil outlet chamber 205, and the third oil inlet chamber 203 and the third oil outlet chamber 206 are all in a working state, and the gear pump is in a full displacement output state;

as shown in fig. 5, when the control panel 6 is located at the second working position, the first oil outlet channel 105 and the second oil outlet channel 106 are communicated with the second control chamber 162, and the third oil inlet channel 103 is communicated with the first control chamber 161, at this time, the first oil inlet chamber 201 and the first oil outlet chamber 204, the second oil inlet chamber 202 and the second oil outlet chamber 205 are in a working state, and the third oil inlet chamber 203 and the third oil outlet chamber 206 are communicated through the first control chamber 161, so that the third oil inlet chamber 203 and the third oil outlet chamber 206 are in a failure state, and the displacement of the present invention is reduced;

as shown in fig. 6, when the control panel 6 is located at the third working position, the first oil outlet channel 105 is communicated with the second control chamber 162, and the second oil outlet channel 106 and the third oil outlet channel 107 are communicated with the first control chamber 161, at this time, the first oil inlet chamber 201 and the first oil outlet chamber 204 are in a working state, the second oil inlet chamber 202 and the second oil outlet chamber 205, and the third oil inlet chamber 203 and the third oil outlet chamber 206 are communicated through the first control chamber 161, so that they are all in a failure state, and the displacement of the present invention continues to decrease;

as shown in fig. 7, when the control panel 6 is located at the fourth working position, the first oil outlet channel 105 is communicated with the first control chamber 161, the second oil outlet channel 106 and the third oil outlet channel 107 are communicated with the second control chamber 162, at this time, the second oil inlet chamber 202 and the second oil outlet chamber 205, the third oil inlet chamber 203 and the third oil outlet chamber 206 are in a working state, and the first oil inlet chamber 201 and the first oil outlet chamber 204 are communicated through the first control chamber 161, so that the first oil inlet chamber 201 and the first oil outlet chamber 204 are in a failure state;

as shown in fig. 8, when the control panel 6 is located at the fifth working position, the first oil outlet channel 105 and the second oil outlet channel 106 are communicated with the first control chamber 161, the third oil outlet channel 107 is communicated with the second control chamber 162, at this time, the third oil inlet chamber 203 and the third oil outlet chamber 206 are in a working state, and the first oil inlet chamber 201 is communicated with the first oil outlet chamber 204, and the second oil inlet chamber 202 is communicated with the second oil outlet chamber 205 through the first control chamber 161, so that they are all in a failure state;

as shown in fig. 9, when the control panel 6 is located at the sixth working position, the first oil outlet passage 105, the second oil outlet passage 106, and the third oil outlet passage 107 are all communicated with the first control chamber 161, and at this time, the first oil inlet chamber 201 and the first oil outlet chamber 204, the second oil inlet chamber 202 and the second oil inlet chamber 202, and the third oil inlet chamber 203 and the third oil outlet chamber 206 are all communicated with each other through the first control chamber 161, so that they are all in a failure state.

It is worth mentioning that when the driving gear 3 rotates in the forward direction, as shown in fig. 2, the first oil inlet chamber 201 cooperates with the first oil outlet chamber 204 through the first driven gear 51, and cooperates with the second oil outlet chamber 205 through the outer ring gear 21; the second oil inlet chamber 202 cooperates with the second oil outlet chamber 205 through the second driven gear 52, and the second oil inlet chamber 202 cooperates with the first oil outlet chamber 204 through the outer ring gear 21; the third oil inlet chamber 203 cooperates with the third oil outlet chamber 206 through the ring gear 22 and the drive gear 3.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.