JPH0634183U - Vertical vane pump - Google Patents

Abstract

(57) [Summary] [Object] To provide a vertical vane pump suitable for transferring a fluid to be fed which is a powdery or granular material. A flow passage 1 in which a rotor outer peripheral surface 3 and a casing inner peripheral surface 12 are coaxially formed for preventing pulsation of a fluid to be fed.
A vertical vane pump provided with a rotor 2 having three vanes 17, 18, and 19.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to improvement of a vertical vane pump.

[0002]

[Prior art]

 In a conventional vertical vane pump, a rotor fixed to the upper end of a rotary shaft having a vertical axis is rotatably arranged in a casing, and the rotor is provided with two vane grooves orthogonal to each other in the axis. The vanes are slidably mounted in the vane grooves along the rotor radial direction.

[0003]

[Problems to be solved by the device]

 When a fluid is transferred using such a conventional vane pump, if the fluid to be delivered is a powder or particles, the pumping force may be insufficient, causing pulsation in the fluid to be delivered. easy. As a result, the transfer capacity may be reduced and the product quality may be uneven.

Therefore, an object of the present invention is to provide a vertical vane pump that solves the above problems, prevents pulsation of the fluid to be fed by the pump, and has high transfer efficiency.

[0005]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention seals the upper opening surface of the pump main body with a cover, the cover is formed with an upward fluid suction port, and the inside of the casing has a vertical axis of rotation. A rotor fixed to the upper end of the shaft is eccentrically rotatably arranged, and the rotor is provided with a plurality of vane grooves intersecting at the shaft center. Each vane groove slides in the rotor radial direction. In a vertical vane pump in which a free vane is mounted and a horizontal fluid discharge port is formed in the casing, in the casing, the fluid suction port is removed in accordance with the rotation direction of the rotor, and the fluid discharge port is caught. A first coaxial section having a flow passage of the same cross-sectional area between the rotor and the casing, and a symmetrical section of the first coaxial section with the rotor axis interposed therebetween. And A second coaxial section which is in contact with the first coaxial pipe and a second vacuum pipe of the evacuation means are respectively opened in the lower surface of the cover and the second coaxial section in the casing. It is a vane pump.

[0006]

[Action]

 According to the present invention, when the pump is started and the rotor rotates, the vane slides in the vane groove in the radial direction of the rotor, sucks the fluid to be fed from the fluid suction port, and receives the fluid in the coaxial area which is the flow path. Pressure is applied to the fluid to be sent out from the fluid discharge port. During this operation, the flow paths in the coaxial area have the same cross-sectional area and three vanes, so there is no pulsation in the fluid to be sent, and continuous transfer with high pressure is performed. To be done.

[0007]

【Example】

 1 is a front view showing an embodiment of a vertical vane pump of the present invention, and FIG. 2 is a plan view showing a state in which the cover of FIG. 1 is opened. As shown in FIGS. 1 and 2, the vertical vane pump has a pump body 1 having an eccentrically arranged rotor 2 therein and a drive unit 20 for imparting rotation to the rotor 2 via a rotary shaft 21. .

The pump body 1 has an upper end surface opened, and a casing 11 having a fluid discharge port 15 oriented in the horizontal direction is integrally attached to a bracket 10 via a housing 13. A cover 4 that is openable and closable by a hinge 5 is attached to the open upper end surface of the casing 11. Further, the cover 4 is provided with an upward fluid suction port 14 that communicates with a hopper 30 into which the fluid to be fed is introduced. In the casing 11, the rotor 2 having a vertical axis is provided in the quarter circumferential angle area around the outer periphery of the casing 11 with a gap serving as the flow passage 16 with respect to the inner peripheral surface 12 of the casing 11. It is installed. This quarter circumference angle area is a first coaxial area in which the outer peripheral surface 3 of the rotor 2 and the inner peripheral surface 12 of the casing 11 are concentric. Therefore, in this first coaxial section, the flow path 16 has the same cross-sectional area over the entire area. Further, on the outer circumference of the rotor 2, a section symmetrical to the first coaxial section with the rotor axis interposed therebetween is defined as a second coaxial section. In the second coaxial section, the outer peripheral surface 3 of the rotor 2 and the casing 11 are arranged. And the inner peripheral surface 12 are arranged in a concentric manner. Then, along the rotational direction R of the rotor 2, the fluid suction port 14 is provided in the upstream ¼ circumferential angle area sandwiching the first coaxial area, and the fluid discharge port 15 is provided in the downstream ¼ circumferential angle area. , Respectively. The fluid discharge port 15 is connected to the next process via the discharge pipe 31. As described above, the first coaxial section is a section that extends from the fluid suction port 14 to the fluid discharge port 15 according to the rotation direction R of the rotor 2.

The rotor 2 has a solid, short-cylindrical rotor body 6 disposed in a casing 11, and a rotor body 6 having a rotor shaft 6 and a rotor body 6 that are concentrically and downwardly reduced in diameter by a step. , A receiving portion 7 and a shaft mounting portion 5 which are integrally formed in this order. The rotor body 6 is provided with three vane grooves 9 intersecting at an axis C at an angle of 60 °. Each of the vane grooves 9 has an I-shape in plan view as shown in the development view of FIG. As shown in the perspective view of FIG. 4, the steel-shaped first vane 17 and the channel-shaped steel-shaped second vane 18 and the third vane 19 are combined and mounted via the same axis C. The first vane 17 has a total length in the longitudinal direction of L and a total width in the width direction of D, and has flange portions 17a, 17a having a length L1 at both ends in the longitudinal direction, and a space between the both flange portions 17a, 17a is in the width direction. The neck portion 17b is provided with rectangular notches 17c on both sides. The width D1 of the neck portion 17b and the width D2 of the both-side cutout portions 17c are both 1/3 of the total width D. The length of the neck portion 17b and the cutout portion 17c is L 2.

The second vane 18 has a total length in the longitudinal direction of L and a total width in the width direction of D, and has flange portions 18a, 18a having a length L1 at both ends in the longitudinal direction. One side in the width direction is connected between 18a by a web portion 18b having a groove portion 18c. The width D3 of the web portion 18b is equal to the width D1 of the neck portion 17b of the first vane 17, and the width D4 of the groove portion 18c is set to 2D / 3. The lengths of the web portion 18b and the groove portion 18c are set to be the same as the length L2 of the neck portion 17b and the cutout portion 17c of the first vane 17.

Similar to the second vane 18, the third vane 19 is formed to have the same shape and the same size including both flange portions 19a and 19a and a web portion 19b having a groove portion 19c on one side in the width direction.

Each of the vanes 17, 18 and 19 has a thickness such that it can be slidably mounted in the vane groove 9, and in use, as shown in FIG. 4, from the left and right of the first vane 17 to the neck portion 17b, respectively. The groove portions 18c and 19c are engaged with each other, and are inserted from the side opposite to the rotation shaft of the rotor 2 and arranged and assembled in each vane groove.

Each of these vanes 17, 18 and 19 is made of stainless steel and is slidable along the radial direction of the rotor, but at least its sliding direction ends are preferably covered with a stellite layer. The inner peripheral surface 12 of the casing is also made of stainless steel.

A shaft mounting hole 22 concentric with the rotary shaft 21 is provided at an end of the shaft mounting portion 8 of the rotor 2 on the rotary shaft side, and the rotor 2 is fitted to the rotary shaft 21 by a key (not shown). It matches.

The casing 11 is fixed to the housing 13 by using a housing bolt (not shown) or the like, and the housing 13 is fixed to the bracket 10. The receiving portion 7 and the shaft mounting portion 8 of the rotor 2 are supported by the housing 13 via Teflon pushes 23 and 24.

The rotating shaft 21 is decelerated and rotated from a motor 25 via a speed reducer 26. Reference numeral 27 shown in FIG. 1 is a coupler between the motor rotating shaft and the reduction gear receiving shaft, and reference numeral 28 is an O-ring for sealing.

The vertical pump of the present invention is connected to a vacuum pump (not shown) and is evacuated. That is, the other end of the first vacuum pipe 32, one end of which is connected to the vacuum pump, penetrates the cover 4 and opens toward the upper end surface of the rotor body 6 on the second coaxial section side. Further, the other end of the second vacuum pipe 33, one end of which is connected to the vacuum pump, penetrates the casing 11 and opens to the second coaxial section in the casing 11. The rotor body may be a hollow short cylindrical body in addition to the above-mentioned embodiment.

When the above vane pump is started and the rotor 2 rotates, the three vanes 17, 18 and 19 slide in their respective vane grooves 9 in the radial direction of the rotor, and both end faces of the vane 17 of the casing 11 are slid. It rotates in contact with the inner peripheral surface 12, applies pressure to the fluid to be fed in the flow path 16, and sends it out through the fluid discharge port 15. In the present invention, since three vanes 17, 18 and 19 are adopted, the pumping force is much stronger than that of the two vanes, and continuous quantitative transfer becomes possible. At the time of this operation, in the first coaxial area, since the flow path 16 is formed to have the same cross-sectional area, a constant pressure continuously acts on the fluid to be fed, and the fluid to be pulsated or damaged. Never receive.

On the other hand, in the vertical vane pump according to the present invention, the vacuum pump is activated when the vane pump is started, and the first vacuum opening in the narrow gap between the cover 4 and the rotor 2 and the narrow gap between the casing 11 and the rotor 2 is performed. The inside of the casing 11 is evacuated by the pipe 32 and the second vacuum pipe 33, and the fluid to be fed is deaerated.

By this evacuation, the feed fluid mixed with air can be easily transferred, and the tight state of the feed fluid becomes constant by degassing, and the quantitativeness is improved. Also, if the fluid to be delivered is a viscous food material such as ham or sausage, it can be prevented from breeding bacterial bacteria by being degassed, and foods made from this material can be spoiled. Helps prevent defeat. Since the vacuum pipes 32 and 33 are both opened in a narrow gap, the viscous fluid to be fed is not sucked into these vacuum pipes.

In addition to the above, according to the present invention, each vane 17, 18, 19 is made of stainless steel, the tip of the vane is covered with a stellite layer, and the inner peripheral surface of the casing is also made of stainless steel. Therefore, abrasion due to friction of each vane and casing is prevented. Further, since the receiving portion 7 and the shaft mounting portion 8 of the rotor 2 are supported by the housing 13 via the Teflon pushes 23 and 24, seizure of this portion which is most loaded during rotation is prevented.

[0022]

[Effect of device]

 As described above, according to the present invention, in the vertical vane pump, the section from the fluid suction port to the fluid discharge port according to the rotation direction of the rotor is formed to have the same cross-sectional area. No pulsation occurs in the fluid to be fed. In addition, since three intersecting vanes are mounted on the rotor in a slidable manner in the rotor radial direction, a strong transfer force can be obtained even if the fluid to be fed is a granular material, and the fluid to be fed is The continuous transfer of is surely carried out.

As described above, by using the vertical vane pump of the present invention, the quality of the delivered fluid is improved.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an embodiment of the present invention.

FIG. 2 is a plan view showing a state in which a cover is opened.

FIG. 3 is a development view of a vane.

FIG. 4 is a perspective view showing an assembled state of the vane.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pump main body 2 Rotor 3 Rotor outer peripheral surface 4 Cover 6 Rotor main body 9 Vane groove 11 Casing 12 Casing inner peripheral surface 14 Fluid suction port 15 Fluid discharge port 16 Flow path 17 First vane 18 Second vane 19 Third vane 20 Drive part 32 first vacuum pipe 33 second vacuum pipe

Claims (1)

[Scope of utility model registration request] 1. A pump main body has an upper opening surface hermetically sealed with a cover, an upward fluid suction port is formed in the cover, and is fixed to an upper end of a rotary shaft having a vertical axis inside a casing. The rotor is eccentrically and rotatably arranged.
The rotor was provided with a plurality of vane grooves intersecting with each other in the axial center, each vane groove was fitted with a vane slidable in the rotor radial direction, and a horizontal fluid discharge port was formed in the casing. In the vertical vane pump, the flow path in the casing is a coaxial area in which the rotor and the casing have the same cross-sectional area in the section from the fluid suction port to the fluid discharge port according to the rotation direction of the rotor. The rotor body is provided with three vane grooves with an angle of 60 ° around the rotor body. These vane grooves are provided with a first I-shaped steel vane and a notch portion of the first vane. On the other hand, a vertical vane pump is equipped with a groove-shaped steel second vane and a third vane of the same type which are assembled from above and below with their respective groove portions facing each other.