CN100453981C - A kind of impeller flowmeter with shaft sleeve - Google Patents

Abstract

The invention relates to an impeller flow meter with a shaft sleeve. In order to overcome the defect that the impeller flow meter with built-in bearings in the prior art has insufficient durability of the flow meter, the present invention sets the impeller shaft sleeve (7) on the middle part of the impeller shaft (6), and the sliding fit between the two makes the impeller shaft The sleeve (7) is able to rotate around the impeller shaft (6). In order to limit the position of the impeller shaft sleeve (7), two limit sleeves (8) are fitted on both sides of the impeller shaft (6), which slide and fit with the impeller shaft (6), and can also wrap around the impeller shaft (6) Do rotary motion and axial motion. The shaft end positioning grooves (9) are located at the junction of the base table seat (1) and the base table cover (2) and are all distributed on the inner wall of the base table seat (1). The invention uses the impeller shaft sleeve (7) and the limit shaft sleeve (8), which effectively improves the stability, durability and measurement accuracy of the impeller flow meter, and has the characteristics of simple process and low cost.

Description

A kind of impeller flowmeter with shaft sleeve

(1) Technical field:

The invention relates to the field of heating and water supply for buildings, and relates to an impeller flow meter with a shaft sleeve.

(2) Background technology

The mechanical heat meter in the prior art consists of an impeller flow meter for measuring the hot water flow rate and two thermometers for measuring the temperature of the supply water and the return water. When the water flows through the impeller flow meter, it drives the impeller in the watch core to rotate, and the rotating circle of the impeller The number represents the amount of water passing through, and the number of revolutions of the impeller is sent out through the sensing piece on the impeller and the signaling device on the impeller cover.

Due to the hot water for indoor heating in winter, the water quality is difficult to ensure clean. For the impeller-type flowmeter of the prior art, there are impurities in the water that adhere and block the flowmeter, resulting in a serious decline in the measurement accuracy of the flowmeter. Shortened operating life and poor reliability. In order to overcome the defects of this prior art impeller flowmeter, the application number is 200510096312.1 discloses an "impeller flowmeter", in this method, the impeller shaft is arranged horizontally along the water flow direction, and miniature bearings are introduced to reduce the Rotating friction with the surface of the impeller shaft, and positioning holes are provided on the inner walls of the tubes on both sides of the junction of the base surface seat and the base surface cover to position the impeller shaft. The impeller-type flowmeter can overcome the defect that the impeller-type flowmeter is easily blocked by sundries in water, so that the reliability of the impeller-type flowmeter can be improved and the measurement accuracy can be guaranteed. However, due to the impeller of this impeller type flow meter, its rotating speed is as high as 3000 rpm during operation. In addition, the miniature bearings fixed on the impeller are easily corroded in the high temperature water of heating during the heating period, while in non-heating It is exposed to the air for a period of time, which is easy to accelerate rusting. Even if the wear-resistant ceramic ball stainless steel bearings are used today, it is difficult to guarantee the operating life of more than four winter heating periods, and the price of miniature bearings is also relatively expensive. It can be seen that it is necessary to avoid the blockage of the impeller flow meter by the sundries in the water, and to work reliably with a long life, and the cost is also economical. expect.

(3) Contents of the invention

In order to overcome the defect of insufficient durability of the flow meter in the impeller flow meter with built-in bearings in the prior art, the present invention proposes an impeller flow meter with a shaft sleeve.

The invention comprises a base table base, a base table cover, a vane, an impeller, an impeller shaft, an impeller shaft sleeve, a limit shaft sleeve and a shaft end positioning groove, wherein the impeller and the blade are integrally formed. The circular impeller shaft sleeve is sleeved on the middle part of the impeller shaft, and the two are slidingly fitted so that the impeller shaft sleeve can rotate around the impeller shaft. The inner diameter of the impeller is closely matched with the outer diameter of the impeller shaft sleeve. In order to limit the position of the impeller shaft sleeve, two limit sleeves are fitted on the impeller shaft. Do rotary motion and axial motion. The impeller shaft is placed in the positioning groove on the inner wall of the junction between the base table seat and the base table cover.

The impeller shaft, impeller shaft sleeve and limit shaft sleeve are all made of high wear-resistant ceramic materials.

The application of the impeller shaft, impeller bushing and positioning bushing in the present invention greatly improves the stability, durability and measurement accuracy of the impeller flowmeter, establishes the practicability of the impeller flowmeter to prevent the blockage of sundries in water, and has the advantages of The advantage of cost economy; the position selection of the shaft end positioning hole improves the positioning accuracy of the impeller flowmeter, and eliminates the difficulty of positioning the impeller shaft assembly in the impeller flowmeter.

(4) Description of drawings:

Accompanying drawing 1 is the structure schematic diagram of the impeller flow meter with shaft sleeve.

Accompanying drawing 2 is the structural schematic diagram A-A section of the impeller flow meter with the shaft sleeve. in:

1. Base table seat 2. Base table cover 3. Blade 4. Sending sensor piece 5. Impeller

6. Impeller shaft 7. Impeller bushing 8. Limiting bushing 9. Locating slot

(5) Specific implementation methods:

Now in conjunction with accompanying drawing 1 and accompanying drawing 2 the present invention will be further described:

Embodiment one

This embodiment includes a base table seat 1, a base table cover 2, blades 3, a signaling sensor 4, an impeller 5, an impeller shaft 6, an impeller shaft sleeve 7, a limit shaft sleeve 8 and a shaft end positioning groove 9, wherein the impeller shaft 6. Both the impeller shaft sleeve 7 and the limit shaft sleeve 8 are made of silicon nitride, that is, Si3N4 ceramic material.

In this embodiment, the impeller 5 and the blade 3 are cast integrally. The inner diameter of the circular impeller shaft sleeve 7 with a cavity is slightly larger than the impeller shaft 6, and the length is 1/2 of the impeller shaft 6, and it is set on the middle part of the impeller shaft 6, and the two are slidably fitted to make the impeller shaft sleeve 7 It can rotate around the impeller shaft 6 . The inner diameter of the impeller 5 is closely matched with the outer diameter of the impeller shaft sleeve 7 . In order to limit the position of the impeller shaft sleeve 7 on the impeller shaft 6, two limit shaft sleeves 8 are also sleeved on the impeller shaft 6. The limit shaft sleeves 8 are respectively located on both sides of the impeller shaft sleeve 7. Slightly larger than the diameter of the impeller shaft 6, there is a sliding fit between the two, which can rotate and move axially around the impeller shaft.

The base meter seat 1 is connected with the water pipes at both ends of the flow meter, and cooperates with the base meter cover 2 to form the casing of the impeller type flow meter. There are positioning grooves 9 at the junction of the base table base 1 and the base table cover 2 and on the inner walls of the pipes on both sides in the diameter direction of the water pipe.

When assembling, one limit sleeve 8, the impeller sleeve 7 and the other limit sleeve 8 are sequentially set on the impeller shaft 6, and then the two ends of the impeller shaft 6 are bonded in the positioning groove 9, and then The sending induction sheet 4 is bonded to the impeller 5, and finally the base table base 1 and the base table cover 2 are fixedly connected together by means of ultrasonic thermal fusion welding.

Embodiment two

This embodiment includes a base table seat 1, a base table cover 2, blades 3, a signaling sensor 4, an impeller 5, an impeller shaft 6, an impeller shaft sleeve 7, a limit shaft sleeve 8 and a shaft end positioning groove 9, wherein the impeller shaft 6. Both the impeller shaft sleeve 7 and the limit shaft sleeve 8 are made of zirconia, that is, ZrO2 ceramic material.

In this embodiment, the impeller 5 and the blade 3 are cast integrally. The inner diameter of the circular impeller shaft sleeve 7 with a cavity is slightly larger than the impeller shaft 6, and the length is 1/2 of the impeller shaft 6, and it is set on the middle part of the impeller shaft 6, and the two are slidably fitted to make the impeller shaft sleeve 7 It can rotate around the impeller shaft 6 . The inner diameter of the impeller 5 is closely matched with the outer diameter of the impeller shaft sleeve 7 . In order to limit the position of the impeller shaft sleeve 7 on the impeller shaft 6, two limit shaft sleeves 8 are also sleeved on the impeller shaft 6. The limit shaft sleeves 8 are respectively located on both sides of the impeller shaft sleeve 7. Slightly larger than the diameter of the impeller shaft 6, there is a sliding fit between the two, which can rotate and move axially around the impeller shaft.

The base meter seat 1 is connected with the water pipes at both ends of the flow meter, and cooperates with the base meter cover 2 to form the casing of the impeller type flow meter. There are positioning grooves 9 at the junction of the base table base 1 and the base table cover 2 and on the inner walls of the pipes on both sides in the diameter direction of the water pipe.

When assembling, one limit sleeve 8, the impeller sleeve 7, and the other limit sleeve 8 are sequentially placed on the impeller shaft 6, and then the two ends of the impeller shaft 6 are bonded in the shaft end positioning groove 9 , and then bonding the sending induction piece 4 on the impeller 5, and finally the base table seat 1 and the base table cover 2 are fixedly connected together by gluing.

Embodiment three

This embodiment includes a base table seat 1, a base table cover 2, blades 3, a signaling sensor 4, an impeller 5, an impeller shaft 6, an impeller shaft sleeve 7, a limit shaft sleeve 8 and a shaft end positioning groove 9, wherein the impeller shaft 6. Both the impeller bushing 7 and the limiting bushing 8 are made of silicon carbide, that is, Sic ceramic material.

In this embodiment, the impeller 5 and the blade 3 are cast integrally. The inner diameter of the circular impeller shaft sleeve 7 with a cavity is slightly larger than the impeller shaft 6, and the length is 1/2 of the impeller shaft 6, and it is set on the middle part of the impeller shaft 6, and the two are slidably fitted to make the impeller shaft sleeve 7 It can rotate around the impeller shaft 6 . The inner diameter of the impeller 5 is closely matched with the outer diameter of the impeller shaft sleeve 7 . In order to limit the position of the impeller shaft sleeve 7 on the impeller shaft 6, two limit shaft sleeves 8 are also sleeved on the impeller shaft 6. The limit shaft sleeves 8 are respectively located on both sides of the impeller shaft sleeve 7. Slightly larger than the diameter of the impeller shaft 6, there is a sliding fit between the two, which can rotate and move axially around the impeller shaft.

The base meter seat 1 is connected with the water pipes at both ends of the flow meter, and cooperates with the base meter cover 2 to form the casing of the impeller type flow meter. There are positioning grooves 9 at the junction of the base table base 1 and the base table cover 2 and on the inner walls of the pipes on both sides in the diameter direction of the water pipe.

When assembling, one limit sleeve 8, the impeller sleeve 7, and the other limit sleeve 8 are sequentially placed on the impeller shaft 6, and then the two ends of the impeller shaft 6 are bonded in the shaft end positioning groove 9 , and then bonding the sending induction piece 4 on the impeller 5, and finally the base table base 1 and the base table cover 2 are fixedly connected together by means of ultrasonic thermal fusion welding.

Embodiment Four

This embodiment includes a base table seat 1, a base table cover 2, blades 3, a signaling sensor 4, an impeller 5, an impeller shaft 6, an impeller shaft sleeve 7, a limit shaft sleeve 8 and a shaft end positioning groove 9, wherein the impeller shaft 6. Both the impeller shaft sleeve 7 and the limit shaft sleeve 8 are made of aluminum oxide, that is, Al ₂ O ₃ ceramic material.

In this embodiment, the impeller 5 and the blade 3 are cast integrally. The inner diameter of the circular impeller shaft sleeve 7 with a cavity is slightly larger than the impeller shaft 6, and the length is 1/2 of the impeller shaft 6, and it is set on the middle part of the impeller shaft 6, and the two are slidably fitted to make the impeller shaft sleeve 7 It can rotate around the impeller shaft 6 . The inner diameter of the impeller 5 is closely matched with the outer diameter of the impeller shaft sleeve 7 . In order to limit the position of the impeller shaft sleeve 7 on the impeller shaft 6, two limit shaft sleeves 8 are also sleeved on the impeller shaft 6. The limit shaft sleeves 8 are respectively located on both sides of the impeller shaft sleeve 7. Slightly larger than the diameter of the impeller shaft 6, there is a sliding fit between the two, which can rotate and move axially around the impeller shaft.

The base meter seat 1 is connected with the water pipes at both ends of the flow meter, and cooperates with the base meter cover 2 to form the casing of the impeller type flow meter. There are positioning grooves 9 at the junction of the base table base 1 and the base table cover 2 and on the inner walls of the pipes on both sides in the diameter direction of the water pipe.

When assembling, one limit sleeve 8, the impeller sleeve 7, and the other limit sleeve 8 are sequentially placed on the impeller shaft 6, and then the two ends of the impeller shaft 6 are bonded in the shaft end positioning groove 9 , and then bonding the sending induction piece 4 on the impeller 5, and finally the base table base 1 and the base table cover 2 are fixedly connected together by means of nuts and screws.

Claims (3)

1. impeller flow meter that axle sleeve is arranged, comprise base table seat (1), base table lid (2), blade (3), impeller (5), impeller shaft (6), impeller sleeve (7), spacing axle sleeve (8) and axle head locating slot (9), it is characterized in that on impeller shaft (6), being set with impeller sleeve (7) and a pair of spacing axle sleeve (8), spacing axle sleeve (8) is set in the both sides of impeller shaft, and impeller sleeve and spacing axle sleeve all are slidingly matched with impeller shaft, and axle head locating slot (9) is positioned on the inwall of joint portion of base table seat (1) and base table lid (2).

2. the impeller flow meter that axle sleeve is arranged according to claim 1 is characterized in that impeller (5) and the integrated poured moulding of blade (3).

3. the impeller flow meter that axle sleeve is arranged according to claim 1 is characterized in that impeller shaft (6), impeller sleeve (7) and spacing axle sleeve (8) all make with the high abrasion stupalith.

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