JPH061080B2 - Vane pump - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an improvement of a vane pump that allows reversible flow of a fluid.

[Conventional technology]

The Applicant invented the vane pump disclosed in Japanese Patent Laid-Open No. 174586/1987 as a means for enabling reversible flow of fluid. The vane pump according to the present invention is
A plurality of vanes are provided so as to be rotatable in the plane of the rotor in the rotational direction of the rotor arranged at appropriate intervals in the circumferential direction of the reversible rotor arranged in a substantially circular casing. Locking means such as an adjusting bolt for holding the vane at a front and rear position in the rotational direction of the vane with a predetermined inclination with respect to the radial direction of the rotor is provided. The suction side and the discharge side are alternately switched.

[Problems to be Solved by the Invention]

However, in the vane pump according to the above-mentioned Applicant's invention, in order to make the rotor reversibly rotatable, each vane corresponding to a plurality of concave grooves formed at appropriate intervals on the peripheral surface of the rotor is provided on the surface in the rotational direction of the rotor. So that it can be rotated within
The base portion is located on a line connecting the groove and the center of the rotor and pivotally attached to the rotor, and each vane is protruded from each groove in the radial direction of the rotor, and is formed on the inner surface of each groove. Since the adjusting bolts are screwed so that they can move back and forth, and the inclination of each vane can be adjusted by the protruding amount of each adjusting bolt, the structure of the rotor itself is complicated and it is difficult to manufacture. There is a problem that it takes a lot of time to adjust the inclination of the vane, and the adjusting bolt often comes off during operation, resulting in a high failure rate.

Then, the objective of this invention is providing the vane pump which solved all such problems.

[Means for Solving the Problems]

In order to achieve such an object, the vane pump of the present invention has a rotor in which a large number of vanes are fixedly installed at appropriate intervals in the rotational direction, is axially supported in a casing, and one side wall of the casing is provided with a pair of communicating with the inside of the casing. A fluid conduit is provided, and a common conduit is provided, one end of which communicates with both of the fluid conduits and the other end of which communicates with the center of the rotor in the casing. A switching valve for forcibly shutting off is installed in each fluid pipeline, and when the fluid flows from the casing to the fluid pipeline side by operating at the fluid pressure, the flow to the common pipeline is blocked and the flow is When cut off, check valves are provided to open the flow to the common pipeline.

[Action]

In the vane pump according to the present invention, first, when the switching valve 10 closes the lower end opening 7a of the fluid conduit A as shown in FIG. 1, the fluid flowing in the casing 1 in the direction of the arrow rotates the rotor 2. Flow into the fluid line B from the lower end opening 7b opened by the above and push up the check valve 11b to open the communication port 4
It is sent to the fluid line B while blocking b. On the other hand, the fluid flowing into the fluid line A pushes down the check valve 11a and the communication port 4
It flows into the common conduit C communicating via a, flows into the center of the rotor 2 in the casing 1, flows out again in the direction of the arrow due to centrifugal force, and follows the same path.

Further, as shown in FIG. 2, when the switching valve 10 closes the lower end opening 7b of the fluid conduit B, the fluid flowing in the direction of the arrow in the casing 1 is opened from the lower end opening 7a to the fluid conduit A. To the fluid pipe A while closing the communication port 4a by pushing up the check valve 11a. On the other hand, fluid line B
The fluid that has flowed into the flow path pushes down the check valve 11b, flows into the common conduit C that communicates via the communication port 4b, flows into the central portion of the rotor 2, and follows the same path again.

〔Example〕

An embodiment of the vane pump according to the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 is a substantially circular casing, 2 is a rotor that is axially supported at an eccentric position in the casing 1, and a large number of vanes 3 are arranged on the inner surface of the rotor 2 at appropriate intervals in the rotational direction. Is fixed in a fixed direction. These vanes 3 are arranged so that their tips are close to the inner peripheral surface of the casing 1 on the eccentric side (the right side in the figure) on which the rotor 2 comes closest, with almost no gap. On the other hand, a pair of fluid conduits A and B communicating with the inside of the casing 1 are connected to the wall surface of the casing 1 located relatively far from the rotor 2 in a protruding manner. Furthermore, one end communicates with both fluid conduits A and B and has a communication port 4
A common conduit C is provided, which communicates via a and 4b and the other end communicates with the central portion of the rotor 2 in the casing 1. The common conduit C is connected to the center of the rotor 2 so as to project forward from the surface of the casing 1 and bypass the surface.

The lower ends of the respective fluid conduits A and B are short valve cylinders 5a and 5b.
Is connected to the casing 1 via the valve cylinders 5a,
The upper end openings 6a and 6b of 5b are provided so as to be substantially perpendicular to the communication ports 4a and 4b on both sides of the common conduit C, and the lower end openings 7a and 7b are provided so as to be located on the same plane. Then, a cylinder 8 is fixed to the outside of the casing 1, and a switching valve 10 for closing one of the lower end openings 7a or 7b is fixedly attached to the tip of the rod 9 by advancing and retracting the rod 9. In addition, one end is pivotally attached to each of the fluid conduits A and B, and the fluid conduits A and B are pivoted to rotate so that the communication ports 4a and 4b of the common conduit C are connected.
Alternatively, check valves 11a and 11b for closing or opening the upper end openings 6a and 6b of the valve cylinders 5a and 5b are provided, respectively.

The vane pump of the present invention has the above-described configuration, and firstly,
As shown in the figure, in the state where the switching valve 10 closes the lower end opening 7a of the fluid conduit A, the fluid flowing in the direction of the arrow in the casing 1 by the rotation of the rotor 2 is opened from the lower end opening 7b. It flows into the conduit B, pushes up the check valve 11b and closes the communication port 4b, and is sent out to the fluid conduit B. On the other hand, the fluid flowing into the fluid conduit A pushes down the check valve 11a, flows into the common conduit C communicating through the communication port 4a, flows into the central portion of the rotor 2 in the casing 1, and is re-arrowed by centrifugal force. It flows in the direction shown and follows the same route.

Further, as shown in FIG. 2, when the switching valve 10 closes the lower end opening 7b of the fluid conduit B, the fluid flowing in the direction of the arrow in the casing 1 is opened from the lower end opening 7a to the fluid conduit A. To the fluid pipe A while closing the communication port 4a by pushing up the check valve 11a. On the other hand, fluid line B
The fluid that has flowed into the flow path pushes down the check valve 11b, flows into the common conduit C that communicates via the communication port 4b, flows into the central portion of the rotor 2, and follows the same path again.

Further, in the vane pump shown in FIG. 3, the check valves 11a and 11b are used to reliably open and close the respective pipelines.
It shows an embodiment in which both ends of the connecting rod 12 are pivotally supported by a and 6b to integrally connect them. The connecting rod 12 is not necessarily required to operate the vane pump by vertically placing it as in this embodiment, but if there is a check valve 11
The opening / closing operation of a and 11b becomes reliable. However, it is always necessary when using the vane pump horizontally.

FIG. 4 shows an example in which the vane pump thus constructed is used in a fiber dyeing apparatus, and the vane pump is vertically arranged below the dyeing tank 13. The check valves 11a and 11b are connected by a connecting rod 12 as in the case shown in FIG. In the figure, 14 is a frame-shaped machine stand that supports the vane pump. Then, the dyeing tank 13 is installed on the machine base 14. This dyeing tank 13 is provided with a lid that can be hermetically sealed, and the fiber material M is inserted into a porous tube 16 established on the upper surface of the branch base 15 and dyed with a dyeing solution. Dye liquor supply pipe 17 connected to a dye liquor tank (not shown)
Is supplied to the inside of the dyeing tank 13 via. Reference numeral 18 is a steam pipe for heating the dyeing liquid in the dyeing tank 13 so as to keep the dyeing liquid at a predetermined temperature. Reference numeral 19 is a drainage pipe for discharging the dyeing liquid from the dyeing tank 13. 20
Is a vacuum pump, and 21 is a pressure pump, which are connected to the dyeing tank 13. Reference numeral 22 is a microwave generator having a frequency of 2400 to 2500 MHz, which is a known magnetron transmission tube, and is connected to the dyeing tank 13 via a wave conduit 23. Reference numeral 24 represents a pressure gauge attached to the dyeing tank 13.

Then, the upper end of one fluid conduit A of the vane pump is joined to the bottom wall of the dyeing tank 13, and the upper end of the other fluid conduit B is joined to the branch base 15. When the textile material M is dyed by this textile dyeing device, the dyeing solution is supplied from the dyeing tank into the dyeing tank 13 through the liquid supply pipe 17, and the steaming pipe 18 is used to heat the dyeing solution. At 10, the motor (not shown) is operated to drive the vane pump while the fluid conduit A is closed and the fluid conduit B is opened. Then, the dye liquor flowing in the rotating direction of the rotor 2 in the casing 1 is extruded from the fluid pipe B and sent into the dye tub 13 through the porous pipe 16 for dyeing. On the other hand, the dyeing liquid accumulated in the dyeing tank 13 is the fluid conduit A.
To the central portion of the rotor 2 through the common conduit C, and the series of operations described with reference to FIG. 1 is performed. Then, after a lapse of a certain period of time, the cylinder 8 is operated to move the switching valve 10 to the right to close the fluid pipeline B and open the fluid pipeline A, and the series of operations described in FIG. 2 are performed. The dyeing liquid is extruded from the casing 1 into the fluid line A and fed into the dyeing tank 13. In this way, the switching valve 10 is reciprocated at regular intervals to appropriately flow the washing liquid back and forth, so that the fiber material M is uniformly dyed from the outside and from the inside.

At this time, when the switching valve 10 closes the lower opening 6a of the fluid conduit A, the dyeing liquid flows into the fluid conduit B and pushes up the check valve 11a, so that one communication port 4b of the common conduit C is formed. The check valve 11b is raised by the dyeing liquid that rises while blocking the
Is pressed down to open the other communication port 4a of the common conduit C, so that the common conduit C quickly flows into the common conduit C. Double check valves 11a, 11b
, The force of pushing down the check valve 4a is applied to the check valve 4b that closes the communication port 4b by the dyeing liquid, and the check valve 4b is closed reliably. It does not flow into the common conduit C from the gap of the mouth 4b,
As a result, there is almost no loss in dye flow rate. Also,
When the switching valve 10 closes the lower end opening 6b of the fluid conduit B, the flow direction of the dyeing liquid and the operations of the check valves 11a and 11b are reversed.

After dyeing for the required time, drain the dye in the dye tank 13
When the fabric material M is discharged from the air, dehydrated by air under the pressure of the pressure pump 21 and dried, and the inside of the dyeing tank 13 is depressurized by suction of the vacuum pump 20, the moisture impregnated in the fiber material M is under the depressurized state. At this point, low temperature boiling is caused to evaporate, and further, the microwave generator 22 is operated as necessary to introduce microwaves into the dyeing tank 13 and irradiate the fiber material M to uniformly heat the fiber material M. To dry.

Although the case where one usage mode of the vane pump according to the present invention is used for fiber dyeing has been described above, either a vertical type or a horizontal type may be used, and the use of the vane pump of the present invention is not limited to this. Needless to say, it can be widely used for pharmaceutical manufacturing machines and other chemical fibers, as well as civil engineering machines, water tanks, tanks, pools, etc., which appropriately reciprocate liquid flows.

〔The invention's effect〕

As described above, the vane pump of the present invention has a simpler structure than that of the conventional one, which facilitates the manufacture and causes almost no failure during operation. In addition, the liquid flow can be switched between normal and reverse simply by reciprocating the switching valve while rotating the rotor in one direction, and if the two check valves are linked together by the connecting rod, the switching operation of the valve can be performed. There is no loss in the amount of dyeing liquid discharged from the casing, and the dyeing efficiency inevitably increases.

Further, in the fiber dyeing apparatus, since the vane pump is installed vertically under the dyeing tank, it can be made compact and the installation space is small. Further, it has many advantages that it can be used not only in the fiber dyeing apparatus but also in many fields and has a wide range of applications.

[Brief description of drawings]

The drawings are for explaining one embodiment of the present invention. FIG. 1 is an operation explanatory view in a state in which a fluid pipeline A is closed, and FIG. 2 is an operation explanatory view in a state in which a fluid pipeline B is closed. 3 is a sectional view of an embodiment in which both check valves for opening and closing the fluid conduits A and B are connected by a connecting rod, and FIG. 4 is a state of use thereof. 1 ... Casing, 2 ... Rotor, 3 ... Vane, 10 ... Switching valve, 8 ... Cylinder, 11a, 11b ... Check valve, A, B ... Fluid pipeline, C ... Common pipeline.

Claims (2)

[Claims] 1. A rotor in which a large number of vanes are fixed at appropriate intervals in the direction of rotation is axially supported in a casing, and one side wall of the casing is provided with a pair of fluid conduits communicating with the inside of the casing. , A common conduit, one end of which communicates with both fluid conduits and the other end of which communicates with the center of the rotor in the casing, is provided to alternately and forcibly shut off the fluid flow between each fluid conduit and the casing. A switching valve is provided, and each fluid pipeline is operated by the pressure of the fluid and shuts off the flow to the common pipeline when the fluid flows from the casing to the fluid pipeline side. A vane pump characterized by being provided with a check valve for opening the flow to the pipeline. 2. The two check valves are integrally connected by pivotally supporting both ends of the connecting rod to the check valves provided in the respective fluid lines. The vane pump according to item 1.