CN213039469U

CN213039469U - TP vertical vibration-damping noise-reducing single-stage pipeline circulating centrifugal pump

Info

Publication number: CN213039469U
Application number: CN202021063125.6U
Authority: CN
Inventors: 胡理达; 卢东; 单庆云; 吴金亮
Original assignee: Shanghai Tianquan Pump Group Co ltd
Current assignee: Shanghai Tianquan Pump Group Co ltd
Priority date: 2020-06-09
Filing date: 2020-06-09
Publication date: 2021-04-23
Anticipated expiration: 2030-06-09

Abstract

The TP vertical vibration-damping noise-reduction single-stage pipeline circulating centrifugal pump comprises a pump body inner cavity, a motor support is installed in the middle of the upper end of the pump body through a seam allowance, a communicated radial outer edge and a bottom side middle opening are formed in an impeller, the impeller is installed in a volute chamber between the suction chamber and the pressure chamber in the pump body in a horizontal mode, the impeller is coaxially installed at the lower end of a pump shaft, the outer edge of the upper end of the impeller is connected with an upper sealing ring, and the outer edge of the lower end of the impeller is installed on the edge of a ring platform opening of the suction chamber in the pump body through a lower sealing ring; the generalization and standardization degree is improved, and the user can select types more conveniently; moreover, the same-caliber pump is small in size and light in weight, and the manufacturing and transportation cost is saved; can be popularized and applied in large area.

Description

TP vertical vibration-damping noise-reducing single-stage pipeline circulating centrifugal pump

Technical Field

The utility model belongs to general mechanical pump field relates to a vertical circulating pump's institutional advancement technique, and especially the vertical damping of TP falls the single-stage pipeline circulating centrifugal pump of making an uproar.

Background

The circulating pump is a pump for conveying circulating liquid for reaction, absorption, separation and absorption liquid regeneration or a pump for conveying heat exchange/refrigeration medium in the device. Its lift is low in medium level, and is only used for overcoming the pressure drop of circulating system liquid, and can adopt pump with medium-low lift. The circulating pump is the function of the pump, and the centrifugal pump is the structure of the pump, and the two concepts are completely two concepts. The circulating pump is called a circulating pump as the working principle of the circulating pump, and for example, hot water in a water heating pipeline is circulated by the circulating pump.

The performance and the type spectrum of the series of products are determined by the existing circulating pump products according to the ISO2858 standard; the existing pipeline pump is carried out according to a traditional hydraulic design method, the area of a water suction chamber is firstly contracted from a pump flange inlet to an impeller, liquid is diffused and discharged out of a pump body through a pressure water chamber after the energy of the impeller is improved, and the highest flow speed of the inlet is usually lower than 3 m/s.

The existing pipeline circulating pump is used for supplying water and supplying heat and an air conditioning system in the civil field of municipal and urban intelligent water affairs to convey cold water, hot water or softened water, the overflowing part is made of cast iron, the head of a closing point and the flow and head calculation method after impeller cutting are generally different correction methods summarized by university or domestic and foreign enterprise research institutions through statistics according to PATEL, THRONE and Luo West theorem.

The existing pipeline circulating pump impeller is mostly arranged on a special motor shaft extension, a base and a pump body are of an integrated structure, and the pump with the same diameter has lower flow and lift performance; moreover, the motor shaft is made of carbon steel, so that the motor shaft is not suitable for conveying corrosive liquid, but also not beneficial to conveying high-temperature liquid. The pump is coaxial with the motor, heat is easily and quickly transferred to the motor, and the motor shaft extension needs chrome plating or friction welding of stainless steel and carbon steel dissimilar materials when corrosive liquid is conveyed, so that the manufacturing cost is increased; the highest using temperature is more than 80-100 ℃; the matched motor is not easy to realize high, medium and low configuration; the existing product is not provided with a shell sealing ring or a rear opening ring for saving cost, a shell sealing ring wearing part is omitted, dynamic and static clearance adjustment between an impeller and a shell is not facilitated, and maintenance cost is increased; the axial force balance is insufficient; the pump body and the base are integrated to be simplified and saved, the number of casting sand boxes is increased actually, and the risk of increasing the rejection rate of castings is increased.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a TP vertical damping noise reduction single-stage pipeline circulating centrifugal pump can solve above-mentioned problem to can dispose different rank standard motor in order to realize higher pump package efficiency, reach better energy-conserving effect.

The purpose of the utility model is realized by the following technical measures: comprises a pump body, an impeller, a motor support and a pump shaft; the horizontal two ends of the pump body are respectively provided with an inlet and an outlet which are communicated with the inner cavity, and the inner cavity of the pump body comprises a suction chamber and a pumping chamber which are communicated; the pump body upper end middle part trompil installation motor support, the impeller is hollow, and have radial outer fringe and the bottom side middle part opening of intercommunication in the impeller, the impeller is flat to be installed in the volute between suction chamber and the pumping chamber in the pump body, impeller coaxial arrangement is at the pump shaft lower extreme, the pump shaft lower extreme passes the motor support downwards and passes through the centre bore of machine seal connection impeller, impeller upper end middle part epirelief, and impeller upper end outer fringe and last sealing ring are connected, install in motor support middle part cavity bottom down, and the edge leaves the clearance, impeller lower extreme middle part is protruding downwards, and impeller lower extreme outer fringe passes through lower sealing ring and installs on the ring platform mouth edge of suction chamber in the pump body, and leave the clearance.

Particularly, the caliber of the inlet is the same as that of the outlet, and the volume of the suction chamber is larger than that of the pumping chamber.

In particular, the upper end of the pump body is provided with an electric motor through a motor support.

In particular, the inlet and outlet central axes lie in the same horizontal plane perpendicular to the pump shaft central axis as the impeller central axis.

Particularly, the bottom of the pump body is fixed on the bottom plate through screws; the bottom plate is in a square plate shape, four corners of the bottom plate are respectively provided with a fixing screw hole, and the inner sides of four edges of the bottom plate are respectively provided with a positioning hole.

Particularly, the mechanical seal comprises a movable ring, a static ring, a spring and a corrugated pipe which are coaxially connected, wherein the spring is lined or sleeved in the corrugated pipe, the upper end of the corrugated pipe is connected with the movable ring, and the static ring is arranged in a motor support at the upper side of the movable ring.

The utility model discloses an advantage and effect: through the improvement of the modularized split structure, the size precision is improved, and vibration and noise reduction is realized; the performance and specification are expanded, the type spectrum is more standard and clear, the grading is more reasonable, the generalization and standardization degree is improved, and the type selection by a user is more convenient; moreover, the same-caliber pump is small in size and light in weight, and the manufacturing and transportation cost is saved; can be widely popularized and applied.

Drawings

Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention.

Fig. 2 is a schematic top view of the structure of fig. 1.

Fig. 3 is a schematic diagram of a baseplate structure in embodiment 1 of the present invention.

Fig. 4 is a side view of fig. 3.

Fig. 5 is a schematic view of a mechanical seal structure in embodiment 1 of the present invention.

Fig. 6 is the utility model discloses embodiment 1 pump body job connection structure sketch map.

The reference numerals include:

the pump body 1, an impeller 2, a motor support 3, a pump shaft 4, an O-shaped ring 5, a mechanical seal 6, an upper seal ring 7, a lower seal ring 8, a bottom plate 9, a motor 10, an inspection hole 11, an inlet valve 12, a flexible joint 13, a connecting pipe 14, a pressure gauge 15, a reducer 16 and a valve 17; the movable ring 61, the static ring 62, the spring 63, the bellows 64, the outlet 101, the inlet 102, the pumping chamber 103 and the suction chamber 104.

Detailed Description

The principle of the utility model lies in that the hydraulic design, the structural design and the universal design of the single-stage single-suction centrifugal pump are researched, the special improvement and the updating of the test bed test system, the data acquisition system and other systems are combined, the value of the ratio rotating speed calculated aiming at different flow rates, lifts and rotating speeds to the empirical coefficient k is selected from the top to the bottom of 1, and the value is different from the value which is smaller than 1 in the prior art; comparing the existing various structural analyses, and carrying out structural optimization; based on the improvement of structural design and working principle, the combined action of the pipe orifice connecting pipe load and the highest working pressure is considered to determine the pressure grade of the flange, an excellent hydraulic model is developed, tested and verified, the technical condition requirements of the two types of industrial fluids are considered, and the technology and the product performance are extended and expanded.

The utility model discloses the innovation summarizes prototype test data arrangement, statistics, revises experience coefficient in the design computational formula, and the working property is showing and is improving, is suitable for the universalization of series products, standardizes, can carry multiple industry fluid, and the material can be grey cast iron, nodular cast iron through electrophoresis processing or stainless steel. The product is more suitable for heating, air conditioning, cooling, cold, hot water and industrial fluid in residential, commercial building and industrial devices.

The utility model discloses a: pump body 1, impeller 2, motor support 3 and pump shaft 4.

The present invention will be further explained with reference to the drawings and examples.

Example 1: as shown in attached figures 1 and 2, an inlet 102 and a suction chamber 104 which are communicated with an inner cavity, an outlet 101 and a pressure water chamber 103 are respectively arranged at two transverse ends of a pump body 1, a motor support 3 is arranged at the middle part of the upper end of the pump body 1, an impeller 2 is hollow and is provided with a radial outer edge and an opening at the middle part of the bottom side to be communicated, the impeller 2 is axially and horizontally arranged on a shaft in the pump body 1, namely a volute chamber between the suction chamber 104 and the pressure water chamber 103, a pump shaft 4 and the motor support 3 form a chamber of an assembly machine seal 6, the middle part of the upper end of the impeller 2 is upwards convex, the outer edge and the edge of the bottom of a concave chamber connected to the middle part of the motor support 3 are provided with a radial gap upper sealing ring 7, the middle part of the.

In the above description, the inlet 102 and the outlet 101 have the same diameter, and the suction chamber 104 has a larger volume than the pumping chamber 103.

In the foregoing, the motor 10 is mounted on the upper end of the pump body 1 above the motor mount 3.

In the foregoing, the central axes of the inlet 102 and the outlet 101 and the central axis of the impeller 2 are located in the same horizontal plane perpendicular to the central axis of the pump shaft 4. The impeller 2 is fixed to the lower end of the pump shaft 4 by bolting from the inner bottom side upward.

In the foregoing, the opening at the middle part of the upper end of the pump body 1 is provided with the motor support 3 through the O-shaped ring 5.

In the foregoing, the bottom of the pump body 1 is fixed to the bottom plate 9 by screws. As shown in fig. 3 and 4, the bottom plate 9 is a square plate, and has fixing screw holes at four corners and positioning holes at the inner sides of the four corners.

In the foregoing, as shown in fig. 5, the mechanical seal 6 includes a movable ring 61, a stationary ring 62, a spring 63 and a bellows 64, which are coaxially connected, wherein the bellows 64 is lined or sleeved with the spring 63, the movable ring 61 is connected to the upper end of the bellows 64, and the stationary ring 62 is installed on the upper side of the movable ring 61 or sleeved outside the upper end of the bellows 64.

In the foregoing, the front side of the motor 10 is opened with the terminal box hole 11 and is closed by the sealing cover.

In the embodiment of the utility model, the pump unit comprises a pump body 1, a motor 10 of a driving mechanism, and a connecting part between the pump and the motor; the pump comprises a pressure bearing part, namely a pump body 1, a pump cover, namely a motor support 3, a rotating part, namely an impeller 2 and a pump shaft 4, a sealing part, namely an O-shaped ring 5, a mechanical seal 6, an upper sealing ring 7, a lower sealing ring 8, a supporting part bottom plate 9 and the like; the upper sealing ring 7, the mechanical seal 6 and the shaft hole of the motor support 3 form a shaft connecting sealing structure. The inlet and outlet of the pump body 1 are connected with the pipeline by standard flanges. In the hydraulic design, the area of the water absorption chamber 104 in the pump body 1 is from the inlet of a pump flange to the impeller 2, from the inlet 102 to the outlet 101, and then from the water compression chamber 103 to the outlet 101, and the area is from small to large, and the reasonable diffusivity is kept, the highest flow rate of the inlet 102 can reach 10m/s, and the pressure grade is PN 16/25.

In the embodiment of the utility model, the pump set is a split structure, which is convenient for alignment during installation; the modular design is adopted, all parts are designed into enterprise standard parts, part standard parts and national standard parts, the matched mechanical seal and the motor are all industry standard products, the standardization degree is high, 6-gear pump body spigots are arranged according to the lift of 152m or below, the motor support is few in types, convenient to apply and install and high in universality; the pressure grade of the flange is below 1.6MPa, only the lift and the suction pressure are considered, and the pipe connecting load is considered at 2.5 MPa; a series of sealing components are accurately calculated and designed, the impeller 2 is matched with the upper sealing ring 7 and the lower sealing ring 8, axial force of a rotor of the impeller 2 is balanced and sufficient, and the pump has smaller operation vibration and lower noise. Compared with the same performance, the product has small volume, light weight and small occupied area, and saves the manufacturing and transportation cost.

In the embodiment of the present invention, in application, as shown in fig. 6, the inlet 102 and the outlet 101 of the pump body 1 are respectively connected to the inlet valve 12 or the valve 17 through the reducer 16, the adapter 14 and the flexible joint 13, and the pressure gauge 15 is installed on the connecting flange of the inlet 102 and the outlet 101, and the further inlet valve 12 and the valve 17 are further connected to the electromagnetic control mechanism together with the pressure gauge 15 through the communication line.

The embodiment of the utility model provides an in, the pumping medium is inhaled by the suction chamber 104 of the pump body 1, gets into pumping chamber 103 after the 2 energy of last rotating impeller of motor 10 axle drive pump shaft 4 promote, and liquid kinetic energy turns into the potential energy, discharges to the pipeline from the export 101 of the pump body 1. Performance range: flow rate is 5-1600 m³The head is 152m, the rotating speed is 2960/1480/980r/min, and the belt matching asynchronous motor is 380V/2, 4 and 6 poles/3 phase/50 Hz/0.55-315 kW.

In the embodiment of the utility model, the flow under the condition of the same aperture is higher than that of domestic similar products;

in the embodiment of the utility model, the product specification is shaped, 35 prototype prototypes are manufactured, and 120 tests are carried out; compared with the existing product, the efficiency is averagely improved by 3-5%, in addition, the structure technology has the mass production condition through practical development, after popularization, the annual demand of the pump is not lower than 250 thousands of sets, the pump operates for 8 hours every day according to the average power of 15kW, 32.85-54.75 hundred million degrees of electricity can be saved every year, the RMB can be saved by 26.28-43.8 hundred million yuan calculated according to 0.8 yuan/kWh, and the energy-saving economic effect is remarkable; the related technology can be applied to the development of horizontal single-stage centrifugal pump series products to be developed.

Claims

The TP vertical vibration and noise reduction single-stage pipeline circulating centrifugal pump comprises a pump body (1), an impeller (2), a motor support (3) and a pump shaft (4); the pump is characterized in that an inlet (102) and an outlet (101) which are communicated with an inner cavity are respectively arranged at the two transverse ends of the pump body (1), and the inner cavity of the pump body (1) comprises a suction chamber (104) and a water pressing chamber (103) which are communicated; the motor support (3) is installed in the middle of the upper end of the pump body (1), the impeller (2) is hollow, the impeller (2) is internally provided with a communicated radial outer edge and a bottom side middle opening, the impeller (2) is horizontally arranged in a volute chamber between a suction chamber (104) and a pressure water chamber (103) in the pump body (1), the impeller (2) is coaxially installed at the lower end of a pump shaft (4), the lower end of the pump shaft (4) downwards penetrates through the motor support (3) and is connected with a central hole of the impeller (2) through a machine seal (6), the middle of the upper end of the impeller (2) is upwards protruded, the outer edge of the upper end of the impeller (2) is connected with an upper sealing ring (7) and is installed at the bottom of a lower cavity in the middle of the motor support (3), a gap is reserved at the edge, the middle of the lower end of the impeller (2) is downwards protruded, and the outer edge of the lower end, with a gap left.
2. A TP vertical vibration and noise reduction single-stage pipeline circulation centrifugal pump as defined in claim 1, wherein the caliber of the inlet (102) is the same as that of the outlet (101), and the volume of the suction chamber (104) is larger than that of the pumping chamber (103).
3. The TP vertical vibration and noise reduction single-stage pipeline circulating centrifugal pump as claimed in claim 1, wherein the upper end of the pump body (1) is provided with a motor (10) through the upper side of the motor support (3); the impeller of the rotating part is arranged on a pump shaft which is sleeved on a motor shaft extension.
4. A TP vertical vibration and noise reduction single-stage pipeline circulation centrifugal pump according to claim 1, characterized in that the central axis of the inlet (102) and the central axis of the outlet (101) and the central axis of the outlet of the impeller (2) are positioned in the same horizontal plane perpendicular to the central axis of the pump shaft (4).
5. The TP vertical vibration and noise reduction single-stage pipeline circulation centrifugal pump of claim 1, wherein the bottom of the pump body (1) is fixed on the bottom plate (9) through screws; the bottom plate (9) is in a square plate shape, four corners are respectively provided with a fixing screw hole, and the inner sides of the four sides are respectively provided with a positioning hole.
6. A TP vertical vibration and noise reduction single-stage pipe circulation centrifugal pump according to claim 1, characterized in that the mechanical seal (6) comprises a movable ring (61), a static ring (62), a spring (63) and a corrugated pipe (64) which are coaxially connected, wherein the corrugated pipe (64) is lined with or sleeved with the spring (63), the upper end of the corrugated pipe (64) is connected with the movable ring (61), and the static ring (62) is arranged in a motor support at the upper side of the movable ring (61).