JP3184323U - Primary ring removal jig for rotary pump - Google Patents

Abstract

Provided is a jig capable of removing a primary ring that is closely attached to a rotor drive shaft when a pump casing is separated from a gear box.
An axial positioning plate 4 having circumferential positioning rods 5a and 5b on a first surface 4a and supporting a handle 2 on a second surface on the opposite side, and a pair of operating arms attached to the handle 2. 6a, 6b, the circumferential positioning rods 5a, 5b, the axial positioning plate 4, and the operating arms 6a, 6b are inserted into the spline grooves of the rotor driving shaft. When the front end surface of the first arm 4 comes into contact with the first surface 4 of the axial positioning plate, the hooks 7a and 7b at the front end of the operation arm are arranged at positions facing the hook locking holes of the primary ring, and the operation arm can be operated easily. The hook is locked in the hook locking hole of the primary ring.
[Selection] Figure 2

Description

  The present invention relates to a primary ring removal jig used for removing a primary ring when disassembling and cleaning a rotary pump.

  In order to disassemble and clean the rotary pump, it is first necessary to separate the pump casing that houses the pair of rotors from the gear box for transmitting the motor output to the rotor. However, a primary ring that is a mechanical seal material for sealing the inside of the pump casing in a liquid-tight manner while rotating integrally with the rotor drive shaft is disposed around the rotor drive shaft inside the wall of the pump casing that contacts the gear box. It was mounted in close contact, and considerable effort was required to separate the pump casing from the gear box with a force that surpassed the close contact. That is, conventionally, the pump casing is gradually separated from the gear box while hitting it with a plastic hammer or a small hammer or the like, or a screwdriver or the like is used to gradually open the gap between the gear box and the pump casing. It was done.

  In the conventional method of separating the pump casing from such a gear box, in addition to the troublesome work, there is a possibility that an inconvenient result is caused. For example, in the case of a method of repeatedly hitting with a plastic hammer, a small hammer, etc., the pump casing is displaced during the separation work, and a great deal of labor is required for connecting the discharge and suction pipes when the pump casing is reassembled. There was a fear that it would be necessary. Further, when the gear box and the pump casing are pry open with a screwdriver or the like, the knock pin for adjusting the pump casing position is damaged due to a scratching operation by the screwdriver or the like, which may cause a casing center shift.

nothing special

  Therefore, the present invention was created in view of the existing circumstances as described above, and the pump casing is smoothly separated from the gear box by first removing the primary ring that is in close contact with the rotor drive shaft. A primary ring removal jig for a rotary pump is provided.

In order to solve the above problems, a primary ring removal jig for a rotary pump according to the present invention is attached to a pair of rotor drive shafts extending into a pump casing and to the rotor drive shaft via a spline so as to be integrally rotatable. And a primary ring that is closely attached to a base end portion of the rotor drive shaft and rotates together with the rotor, and the spline of the rotor drive shaft is circumferentially positioned in a plurality of protrusions. The primary ring has a cylindrical wall formed on the periphery thereof, and the cylindrical wall is provided on an extension of the center line of the reference protrusion of the spline of the rotor drive shaft. A rotary hook having a first hook locking hole formed therein and a second hook locking hole provided at a position opposite to the first hook locking hole and the cylindrical wall. In flop, a jig for removing the primary ring,
A pair of circumferential positioning rods inserted into the grooves on both sides of the reference protrusion of the spline of the rotor drive shaft from the tip side of the rotor drive shaft;
The circumferential positioning rod has a first surface upright, and when the circumferential positioning rod is inserted into the groove of the rotor drive shaft, the first surface is the tip surface of the rotor drive shaft. An axial positioning plate that regulates the insertion depth of the circumferential positioning rod in contact with
A handle attached to the axial positioning plate;
First and second provided on the handle, extending laterally of the axial positioning plate in the same direction as the circumferential positioning rod, and having first and second L-shaped hooks facing inward at the tips, respectively. An operation arm, and
The first and second operation arms have a flexibility that allows the first and second hooks to approach and separate from each other,
The first and second operation arms and the circumferential positioning rod are arranged such that when the circumferential positioning rod is inserted into the groove of the rotor drive shaft, the first operation arm is directly above the main protrusion. Has a positional relationship arranged along the main ridge,
The first and second operating arms have the first and second hooks connected to the first ring of the primary ring when a tip surface of the rotor drive shaft is in contact with the first surface of the axial positioning plate. It has the length arrange | positioned in the position facing the 1st and 2nd hook latching hole, It is characterized by the above-mentioned.

  The reference ridge of the spline of the rotor drive shaft is a ridge having the maximum width among the plurality of ridges.

  The axial positioning plate has a reinforcing wall provided so as to surround the first surface along a peripheral edge of the first surface.

  The handle is supported by a post extending from the second surface on the back side of the first surface of the axial positioning plate along the extension line of the axis of the rotor drive shaft in the direction opposite to the circumferential positioning rod. The first and second operating arms are provided in the vicinity of both ends of the handle. The rods extend in a direction perpendicular to the extension line of the axis of the rotor drive shaft.

The pump casing has an opening surrounding the tip of the rotor drive shaft accommodated therein,
The first and second operation arms include a first portion that extends from the handle to the vicinity of the axial positioning plate, a second portion that is an intermediate portion near the axial positioning plate, and the axial positioning plate. If the part from the vicinity of the hook to the tip having the hook is the third part, the first part is formed such that the distance between the first and second operating arms is larger than the inner diameter of the pump casing opening, The second part is bent so that the distance between the first and second operating arms is narrowed, and the third part is spaced from the inner diameter of the pump casing opening by the distance between the first and second operating arms. It is smaller and larger than the outer diameter of the rotor drive shaft.

  According to the present invention, only the primary ring sealing around the rotor drive shaft can be easily taken out, so the pump casing can be struck many times with a plastic hammer or a gavel, or the gear can be The pump casing can be removed smoothly from the gearbox without having to pry between the box and the pump casing, eliminating the risk of the pump casing becoming misaligned and damaging the casing adjustment knock pin. .

  That is, since the primary ring removing jig according to the present invention has the above-described configuration, the pair of circumferential positioning rods are inserted into the grooves on both sides of the main protrusion of the spline of the rotor drive shaft, and the first axial positioning plate is inserted. If the first and second L-shaped hooks at the tips of the first and second operating arms are brought close to each other at a position where the first surface is in contact with the tip surface of the rotor drive shaft, the first and second The hook can be locked in the first and second hook locking holes of the primary ring, and the primary ring can be easily taken out simply by pulling the handle toward this side.

  In particular, according to the present invention, the circumferential positioning is performed based on the ridge having the maximum width among the plurality of ridges of the spline of the rotor drive shaft, so that the jig can be reliably positioned in the circumferential direction. is there.

  In addition, according to the present invention, the axial positioning plate is reinforced in strength by the peripheral wall provided so as to surround the first surface, and therefore does not bend and deform unlike a simple plate shape. For this reason, the hooks at the tips of the first and second operation arms supported by the second surface of the axial positioning plate via the handle are unlikely to be misaligned with the hook locking holes of the primary ring.

  Further, according to the present invention, the first and second operating arms are arranged along an extension line of the axial center of the rotor drive shaft from a second surface on the back side of the first surface of the axial positioning plate. Because it is attached to a handle supported by a post extending in the opposite direction to the circumferential positioning rod, it has a much extended length compared to when it is attached to an axial positioning plate. Therefore, the first and second operation arms can be easily bent so that the first and second hooks at the distal end approach and separate from each other.

  In addition to the above, according to the present invention, the first and second operating arms extend from the handle to the vicinity of the guide plate, and the distance between the first and second operating arms is larger than the inner diameter of the pump casing opening. The middle portion in the vicinity of the guide plate is bent so that the distance between the first and second operation arms is narrowed, and the portion from the vicinity of the guide plate to the tip having the hook is the first portion. And the distance between the second operating arms is smaller than the inner diameter of the pump casing opening and larger than the outer diameter of the rotor drive shaft, so that the intermediate portion or interval having the bent portion is smaller than the inner diameter of the pump casing opening. The hook at the tip can be easily locked in the hook locking hole of the primary ring simply by lightly pressing the parts in the direction of approaching each other.

It is an exploded side view of a pump casing. It is a perspective view showing one embodiment of a jig concerning the present invention. (A), (b), (c), (d) is a side view of each stage showing the procedure of removing the primary ring by the jig according to the present invention, and (a ′), (b ′), (c ') And (d') are the same plan views. It is a disassembled side view of the state which separated the pump casing from the gearbox after removing a primary ring.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

  FIG. 1 shows components of a rotary pump using a primary ring removal jig according to the present invention in an exploded state. In using the primary ring removal jig according to the present invention, the casing cover 12 including the cover O-ring 12 a is removed from the pump casing 11 in advance, and the rotor drive shaft 17 extended into the pump casing 11 from the gear box 16. Then, the rotor 13 including the nut 13a, the spring washer 13b, and the nut O-ring 13c, the spring holder 14, and the coil spring 15 are removed.

  The rotor drive shaft 17 is formed with a spline 171 for rotatably holding the rotor 13 integrally on the outer periphery of the intermediate portion. The spline 172 includes a plurality of protrusions 171a and a groove 171b between the protrusions. Become. A plurality of splines 171a of the spline includes a reference ridge 171x serving as a reference for circumferential positioning having the maximum width. A thread groove 172 into which a cap nut 13 a for fixing the axial movement of the rotor 13 is screwed is formed on the peripheral surface of the tip of the rotor drive shaft 17.

  In the state of FIG. 1, on the rotor drive shaft 17, a mating ring 19, which is a stationary ring fixed to the inner wall of the pump casing 11, as a mechanical seal that liquid-tightly seals the vicinity of the base end portion, and the rotor A primary ring 18 that is a rotating ring that rotates integrally with the drive shaft 17 remains. The jig 1 according to the present invention is used to remove the primary ring 18 that is closely attached to the base end portion of the rotor drive shaft 17 among them.

  The primary ring 18 has a large-diameter cylindrical wall 181 erected along the peripheral edge and a small-diameter cylindrical wall 182 continuous thereto, and the small-diameter cylindrical wall 182 has a reference protrusion of the spline 171 of the rotor drive shaft 17. A first hook locking hole 182a provided on the extended line of the center line of 171x and a second hook locking hole 182b provided at a position facing the first hook locking hole and the peripheral wall are formed.

  As shown in FIG. 2, the jig 1 includes a handle 2, and an axial positioning plate 4 is attached to a central portion of the handle 2 via a support trunk 3. The axial positioning plate 4 has a first surface 4a and a second surface 4b which are in a front-back relationship, and a support trunk 3 extending from the handle 2 is attached to the center of the second surface 4b. A pair of circumferential positioning rods 5 a and 5 b are provided on the first surface 4 a of the axial positioning plate 4 so as to protrude in a direction opposite to the support trunk 3. Further, in the vicinity of both ends of the handle 2, a pair of operation arms 6 a and 6 b extend in the same direction as the circumferential positioning rods 5 a and 5 b through the side of the axial positioning plate 4 in a positional relationship facing each other. The jig 1 is generally composed of these handles 2, a support trunk 3, an axial positioning plate 4, a pair of circumferential positioning rods 5a and 5b, and a pair of operation arms 6a and 6b.

  The axial positioning plate 4 is a disc 41 having a diameter slightly larger than the outer diameter of the rotor drive shaft 17 and has a first surface 4a and a second surface 4b. When the circumferential positioning rods 5a and 5b are inserted into the grooves 171b of the spline 171 of the rotor drive shaft 17, the first surface 4a is in contact with the front end surface 173 of the rotor drive shaft 17 and the circumferential positioning plate 4 is circumferential. The insertion depth of the direction positioning rods 5a and 5b is regulated. The peripheral edge of the first surface 4a is reinforced so as not to bend and deform by providing a peripheral wall 42 so as to surround the first surface, and has a cup shape as a whole. Accordingly, the hooks 7a and 7b at the tips of the first and second operation arms 6a and 6b supported by the second surface 4b of the axial positioning plate 4 via the handle 2 are hook engaging holes 182a of the primary ring 18. , 182b is unlikely to be distorted.

  The circumferential positioning rods 5a and 5b have a mutual interval and thickness so that they can be respectively inserted into the grooves 171b on both sides of the reference protrusion 171x having the maximum width among the plurality of protrusions 171a of the rotor drive shaft 17. ing. Thus, in this embodiment, a part of the spline groove 171b is used as a guide groove for the circumferential positioning rods 5a and 5b.

  The jig 1 performs the positioning in the circumferential direction by the circumferential positioning rods 5a and 5b, and presses the axial positioning plate 4 against the tip surface 173 of the rotor drive shaft 17 to perform the positioning in the axial direction. Can be prepared for removal.

  The operation arms 6a and 6b have base ends attached in the vicinity of both ends of the handle 2, and have substantially L-shaped hook portions 7a and 7b facing each other inward at the distal ends. The handle 2 that supports the operation arms 6 a and 6 b is provided with a circumferential positioning rod 5 a that extends from the second surface 4 b on the back side of the first surface 4 a of the axial positioning plate 4 along the extension line of the axial center of the rotor drive shaft 17. , 5b, and is formed in a rod shape extending in a direction orthogonal to the extension line of the axis of the rotor drive shaft 17. With such a configuration, the operation arms 6a and 6b have high flexibility by having a significantly extended length compared to the case where the operation arms 6a and 6b are attached to the axial positioning plate 4. The second operating arms 6a and 6b are easily configured to bend so that the first and second hooks 7a and 7b at the distal end approach and separate from each other.

  The hook portions 7 a and 7 b of the operation arms 6 a and 6 b are used for hooking into a pair of hook locking holes 182 a and 182 b formed in the small-diameter cylindrical wall 182 of the primary ring 18. In the case of this embodiment, the handle 2, a pair of operation arms 6a and 6b provided at both ends of the handle 2 and the support trunk 3 at the center of the handle 2 are arranged on the same plane, It is a plane so as to pass through the center between the pair of circumferential positioning rods 5a and 5b. With this configuration, when the circumferential positioning rods 5a and 5b are inserted into the grooves 171b located on both sides of the reference protrusion 171x of the spline 171 of the rotor drive shaft 17, one of the operation arms 6a or 6b is splined. The upper portion of the reference protrusion 171x of 171 is extended along the reference protrusion. A first hook locking hole 182a is disposed in the small-diameter cylindrical wall 182 of the primary ring 18 on an extension of the center line of the reference protrusion 171x of the spline 171 and is opposed to the first hook locking hole. The second hook locking hole 182b is disposed at the position where the movement is performed. See FIGS. 3 (a '), (b'), (c '), (d').

  As shown in FIG. 2, each of the operation arms 6a and 6b can be divided into three parts from the base end portion to the tip end portion. That is, the portion extending from the handle 2 to the vicinity of the axial positioning plate 4 is the first portion 61, the intermediate portion near the axial positioning plate 4 is the second portion 62, and the hook portions 7 a and 7 b from the vicinity of the axial positioning plate 4. A portion up to the tip having a third portion 63 can be used. The first portion 61 is formed such that the distance L1 between the first and second operating arms is larger than the inner diameter D of the cylindrical wall 11a surrounding the rotor drive shaft 17 of the pump casing 11. The second portion 62 is bent so that the distance between the first and second operation arms 6a and 6b is narrowed. In the third portion 63, the distance L2 between the first and second operating arms 6a, 6b is smaller than the inner diameter D of the cylindrical wall 11a surrounding the rotor drive shaft 17 of the pump casing 11 and larger than the outer diameter d of the rotor drive shaft 17. Formed

  Further, the length from the base end portions of the operation arms 6a and 6b to the tip ends of the hook portions 7a and 7b is such that the circumferential positioning rods 5a and 5b are respectively inserted into predetermined grooves 171b of the splines 171 of the rotor drive shaft 17. When the front end surface 173 of the rotor drive shaft 17 contacts the first surface 4a of the axial positioning plate 4, the hook portions 7a and 7b are connected to the first and second hook locking holes 182a and 182b of the primary ring 18. Are set to face each other.

  Next, with reference to FIG. 3, an outline of an operation for removing the primary ring 18 using the jig 1 according to the present invention will be described step by step.

  3A and 3A show a cylindrical wall 11a of the pump casing 11 from which the casing cover 12, the rotor 13, the spring holder 14, the coil spring 15 and the like shown in FIG. The jig 1 is still in the preparatory stage before the operation arms 6 a and 6 b are inserted into the gap between the casing cylindrical wall 11 a and the rotor drive shaft 17.

  As shown in FIGS. 3B and 3B ′, the operation of removing the primary ring 18 is performed by first connecting the third portion 63 of the operation arms 6a and 6b between the cylindrical wall 11a of the pump casing 11 and the rotor drive shaft 17. In addition, the circumferential positioning rods 5a and 5b are inserted into the grooves 171b on both sides of the reference protrusion 171x of the spline 171 of the rotor drive shaft 17, respectively. 3B and 3B show a state in which the tip surface 173 of the rotor drive shaft 17 is in contact with the first surface 4a of the axial positioning plate 4. FIG. In this state, the hook portions 7a and 7b of the operation arms 6a and 6b are already opposed to the first and second hook locking holes 182a and 182b of the primary ring 18.

  Next, as shown in FIGS. 3 (c) and 3 (c ′), in the state of FIGS. 3 (b) and 3 (b ′), the vicinity of the intermediate portion 62 of the operation arms 6a and 6b is constricted with fingers. I will. Then, as shown in the figure, the hook portions 7a, 7b at the tips of the operation arms 6a, 6b naturally engage with the first and second hook engaging holes 182a, 182b of the primary ring 18.

  Finally, as shown in FIGS. 3D and 3D, by pulling the handle 2 toward the front while the hook portions 7a and 7b are locked in the hook locking holes 182a and 182b, The primary ring 18 that is closely attached to the base end portion of the rotor drive shaft 17 can be removed.

  As described above, by using the jig 1 according to the present invention, the primary ring 18 that is closely attached to the base end portion of the rotor drive shaft 17 can be easily removed by a simple operation. Separation of the gear box 16 and the pump casing 11 that has been extremely laborious can be easily performed.

  FIG. 4 shows a state in which the mating ring (fixed ring) 19 is removed from the rotor drive shaft 17 and the pump casing 11 is separated from the gear box 16 after the primary ring 18 is removed. In this way, all the components of the rotary pump can be cleaned.

2 ... handle 4 ... axial positioning plates 5a, 5b ... a pair of circumferential positioning rods 6a, 6b ... first and second operating arms 7a, 7b ... first and second hooks 11 ... pump casing 12 ... casing Cover 13 ... Rotor 17 ... Rotor drive shaft 171 ... Spline 171a ... Spline protrusion 171b ... Spline groove 171x ... Spline reference protrusion 173 ... Rotor drive shaft tip surface 18 ... Primary ring (mechanical seal rotating ring)
182... Cylindrical walls 182a and 182b... First and second hook locking holes 19... Mating ring (fixed ring)

Claims (5)

A pair of rotor drive shafts extending into the pump casing, a rotor attached to the rotor drive shaft via a spline so as to rotate integrally therewith, and a base end portion of the rotor drive shaft are closely mounted together with the rotor A rotating primary ring, and a spline of the rotor drive shaft includes a reference protrusion for circumferential positioning in a plurality of protrusions, and a cylindrical wall is formed on the periphery of the primary ring. A first hook locking hole provided on an extension of a center line of the reference protrusion of the spline of the rotor drive shaft; and the first hook locking hole and the cylindrical wall opposite to the cylindrical wall. In the rotary pump in which the second hook locking hole provided at the position is drilled, it is a jig for removing the primary ring,
A pair of circumferential positioning rods inserted into the grooves on both sides of the reference protrusion of the spline of the rotor drive shaft from the tip side of the rotor drive shaft;
The circumferential positioning rod has a first surface upright, and when the circumferential positioning rod is inserted into the groove of the rotor drive shaft, the first surface is the tip surface of the rotor drive shaft. An axial positioning plate that regulates the insertion depth of the circumferential positioning rod in contact with
A handle attached to the axial positioning plate;
The first and second first and second hooks are provided on the handle, extend laterally of the axial positioning plate in the same direction as the circumferential positioning rod, and have first and second substantially L-shaped hooks facing inward at the tips. 2 operating arms,
The first and second operation arms have a flexibility that allows the first and second hooks to approach and separate from each other,
The first and second operation arms and the circumferential positioning rod are configured such that when the circumferential positioning rod is inserted into the groove of the rotor drive shaft, the first operation arm is directly above the reference protrusion. Has a positional relationship of extending along the reference protrusion,
The first and second operating arms have the first and second hooks connected to the first ring of the primary ring when a tip surface of the rotor drive shaft is in contact with the first surface of the axial positioning plate. A primary ring removal jig having a length arranged at a position facing the first and second hook locking holes.   The primary ring removal jig according to claim 1, wherein the reference protrusion of the spline of the rotor drive shaft is a protrusion having a maximum width among the plurality of protrusions.   The primary ring removal jig according to claim 1 or 2, wherein the axial positioning plate has a reinforcing wall provided so as to surround the first surface along a peripheral edge of the first surface. The handle is supported by a post extending from the second surface on the back side of the first surface of the axial positioning plate along the extension line of the axis of the rotor drive shaft in the direction opposite to the circumferential positioning rod. Is formed in a rod shape extending in a direction perpendicular to the extension line of the axis of the rotor drive shaft,
4. The primary ring removal jig according to claim 1, wherein the first and second operation arms are provided in the vicinity of both ends of the handle. 5. The pump casing has a cylindrical wall surrounding the rotor drive shaft;
The first and second operation arms include a first portion that extends from the handle to the vicinity of the axial positioning plate, a second portion that is an intermediate portion near the axial positioning plate, and the axial positioning plate. If the part from the vicinity of the hook to the tip having the hook is the third part, the first part is formed such that the distance between the first and second operating arms is larger than the inner diameter of the pump casing opening, The two portions are bent so that the distance between the first and second operating arms is narrowed, and the third portion is spaced from the inner diameter of the pump casing cylindrical wall by the distance between the first and second operating arms. The removal jig for the primary ring according to any one of claims 1 to 4, wherein the jig is formed to be smaller and larger than an outer diameter of the rotor drive shaft.

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