HG 2262-1992 Technical Specifications for Single-stage Cantilever Double-acting Liquid Ring Chlorine Pumps HG2262-1992 Standard download decompression password: www.bzxz.net

Chemical Industry Standard of the People's Republic of China
HG2262226392
Single-stage cantilever double-acting liquid ring chlorine pump
Published on January 8, 1992wwW.bzxz.Net
Ministry of Chemical Industry of the People's Republic of China
Implementation on July 1, 1992
HG2262-92 Technical conditions for single-stage cantilever double-acting liquid ring chlorine pump 2 Types and basic parameters of single-stage cantilever double-acting liquid ring chlorine pump HG2263-92
Chemical Industry Standard of the People's Republic of China
Single-stage cantilever double-acting liquid ring chlorine pump
Technical conditions
1 Subject content and scope of application||tt ||HG2262—92
1.1This standard specifies the design, manufacture, inspection and acceptance requirements of YLJ type single-stage cantilever double-acting liquid ring chlorine pump (hereinafter referred to as liquid ring pump).
1.2This standard is applicable to liquid ring pumps for pumping or conveying dry chlorine with a discharge pressure not exceeding 0.3MPa. The working conditions are that the purity of chlorine is not less than 90%, the water content is not higher than 0.6%, the pump inlet temperature is not higher than 40C, the circulating fluid is 98% sulfuric acid, and the pump inlet temperature is not higher than 30C.
2Referenced standards
Matching of rolling bearings and bearing housings
Technical conditions for high-quality carbon structural steel
Carbon purple structural steel
GB 977
Methods for testing mechanical properties of grey cast iron
GB1031
GB1804
GB5661
GB5675
Surface roughness parameters and their values
Tolerances and fitsLimit deviations of dimensions without tolerancesDimensions of cavities for mechanical seals and soft packings of axially inhaled centrifugal pumpsGrading of grey cast iron
Surface roughness comparisonCasting surface of specimens
HG2100
HG2101
Technical conditions for mechanical seals of liquid ring chlorine pumpsTest and parameter measurement methods of single-stage cantilever double-acting liquid ring chlorine pumpsHG2263
Types and basic parameters of single-stage cantilever double-acting liquid ring chlorine pumpsJB/TOZ369Repair welding of cast iron parts for pumps
JB27 59 General technical conditions for packaging of electromechanical products 3 Technical requirements
3.1 Performance requirements of liquid ring pumps (with water and air as the medium) 3.1.1 Inlet conditions
Inlet pressure 0.101MPa (absolute pressure);
Inlet temperature 20℃;
c. Relative humidity 70%,
3.1.2 Inlet water temperature 15℃
3.1.3 The speed should comply with the requirements of Table 1 of HG2263 3.2 Performance of liquid ring pumps
Approved by the Ministry of Chemical Industry of the People’s Republic of China on January 8, 1992 and implemented on July 1, 1992
HG2262—92
The manufacturer should clearly define the allowable working range of the product and provide the performance curve under the specified conditions (the relationship curve between gas volume, shaft power, efficiency and exhaust pressure).
3.3 Motor
3.3.1 Factors to be considered in selecting motor power. The operating point of the pump is located on the performance curve: b. When only one pump is working in the parallel system, the working conditions that may occur; the atmospheric conditions on site,
3.3.2 The motor power shall not be less than the product of the pump rated shaft power and the corresponding ordinate in Figure 1. %
3.4 ​​Balance and vibration
Rated shaft power of the pump
500(w)
3.4.1 Balance
Main rotating parts that affect vibration, such as impellers, shall be statically or dynamically balanced according to design requirements, and their balancing accuracy shall not be lower than Grade G6.3 in Appendix A.
Item. The allowable unbalanced moment of static balance is calculated as follows: Mmeg
Where: e—allowable eccentricity, m;
Q—impeller weight, N.
b. The allowable unbalanced moment of dynamic balance is calculated as follows: M
3.4.2 Vibration
3.4.2.1 When the liquid ring pump is in normal operation, the Vrms (root mean square vibration velocity) value measured on the bearing body shall not exceed 4.5mm/s. The corresponding bee value amplitude is shown in Appendix B. 3.4.2.2 The liquid ring pump shall operate smoothly throughout the entire process of reaching the rated speed. 3.5 Materials
3.5.1 The materials of the main parts of the liquid ring pump shall be selected according to Table 1. 2
HG.2262-92
Pump body, pump cover, distributor, bearing body, packing gland impeller
3.5.2 Grey cast iron parts shall comply with the provisions of GB5675. 3.5.3 Carbon structural steel shall comply with the provisions of GB699 and GB700. 3.6 Cast iron parts
3.6.1 The surface roughness Ra of the flow-through parts of the parts shall not exceed 50um, and the surface roughness Ra of the parts that affect the appearance shall not exceed 100μm.
3.6.2 The casting defects on the machining surfaces of static sealing, centering, positioning and matching, and the other machining surfaces and non-machining surfaces that do not affect the appearance and can meet the use requirements shall not exceed the requirements of Table 2. 3.6.3 The surface of the impeller, the conical surface of the distributor and the conical surface of the pump cover are not allowed to have casting defects after machining. 3:6.4 Casting defects exceed the requirements of Table 2, When it does not affect the machinability and performance of the cast iron parts, welding repair is allowed. Table 2
The number of defects allowed on the same surface, defect location
Static sealing surface
Centering, positioning, matching
Machinery surface
Surface that does not affect the service strength and
Appearance
Surface that bears liquid pressure
Surface of the flow part
Other non-machined surfaces that do not affect the appearance and strength
Defect size D1)
Not more than 5mm, and not Exceeding 1/5 of the minimum dimension of the surface where
is located
Not more than 5mm, and not exceeding 1/3 of the minimum dimension of the surface where
is located
Not more than 10mm
Not more than 6mm, and not exceeding 1/5 of the minimum dimension of the surface where
is located
Not more than 15mm, and not exceeding 1/3 of the minimum dimension of the surface where
is located
Note: 1) Defect size D = L×B
Defect depth
Not more than 5
mm and not exceeding
The thickness of the wall is not more than 6 mm, and does not exceed the wall thickness. L is the length of the defect; B is the width of the defect. The diameter of the surface where the defect is located is not less than 0.2000.200500.3.6.5 The welding method, process and inspection after welding of defects in cast iron parts shall be in accordance with the provisions of JB/TQZ369. 3.7 Pressure parts 3.7.1 The wall thickness shall meet the requirements of working pressure and test pressure and a certain corrosion margin shall be specified. 3.7.2 The pump housing shall be provided with drainage holes. The distance between the edge of the defect spacing is not less than 2 times the size of the defect. 2. The distance between the edges of the defect shall not be less than 2 times the defect size. 3.8 Impeller HG2262—92 3.8.1. The impeller shall be designed as an integrally enclosed type. 3.8.2 The impeller must be securely fixed on the shaft to prevent radial or axial movement. 3.8.3 For assembled rotor parts, with bearing as reference, the circular runout tolerance of the hole and the outer diameter of the sleeve of the impeller and distributor shall not exceed the requirements of Table 3.
Basic size
The circular runout tolerance of the hole and the outer diameter of the sleeve of the impeller and distributor shall be ≤50
>50~120
>120~250
>250~500
3.8.4 The clearance between the impeller and the distributor is achieved by externally adjusting the rotor. When the rotor moves axially, attention shall be paid to the influence on the mechanical seal. The clearance between the impeller and the distributor and between the impeller and the pump body shall comply with the provisions of Table 4. Table 4
The large end diameter of the impeller and the distributor
≤150
>150~300
>300~500
3.9 Liquid ring pump shaft and sleeve
Total clearance
0.25~0.35
0.35~0.45
Minimum clearance of a single joint
3.9.1 The pump shaft shall have sufficient strength and rigidity. During the operation of the pump, the deformation of the shaft caused by the radial load shall not exceed 50μm at the stuffing box. When calculating the deformation of the shaft, the supporting effect of the packing shall not be considered. The required rigidity of the shaft can be achieved by the combination of the shaft diameter, the bearing span or the cantilever length and the pump body design.
3.9.2 The direction of the thread on the pump shaft should keep the nut in a tightened state when the shaft rotates. 3.9.3 The center hole should be retained on the shaft.
3.9.4 The sleeve should be made of wear-resistant and corrosion-resistant materials. The sleeve should be securely fixed on the shaft. No leakage is allowed from the gap between the shaft and the sleeve.
3.10 Bearings
3.10.1 Rolling bearings are generally used.
3.10.2 All holes or gaps on the bearing body that communicate with the outside should be dust-proof and lubricant-proof under normal working conditions. 3.10.3 When the bearing is lubricated with thin oil, an oil drain plug shall be installed at the bottom of the bearing body, an air vent plug shall be installed at the top, and a constant liquid level oil cup or oil dipstick shall be installed.
3.10.4 The temperature rise of the bearing shall not exceed 35C. The maximum temperature shall not exceed 75℃. 3.11 Shaft seal
3.11.1 The stuffing box allows the installation of packing rings. There should be ample space at the stuffing box. When replacing the packing, other parts should not be removed except for the packing gland and packing ring.
3.11.2 The packing shall be at least 4 turns, and the joints where the packing is placed shall be staggered. 3.11.3 The size of the stuffing box shall comply with the provisions of GB5661. 3.11.4 The performance of the mechanical seal shall comply with the provisions of HG2100. 3.12 Coupling
3.12.1 Generally, elastic coupling is used.
HG2262-92
3.12.2 The coupling cover should be able to cover all rotating parts of the coupling. 313 The limit deviation of the unmarked tolerance size of the parts cutting shall be in accordance with GB1804IT14 grade.
3.14 Surface roughness of main mating surfaces of parts a.
The surface Ra that fits with rolling bearings shall be in accordance with the provisions of GB275: the holes of impeller, bushing and coupling that fit with shaft, Ra<1.6um; the journal that fits with impeller, bushing and coupling, Ra≤1.6um; the conical surface that fits with impeller and distributor, Ra<3.2jum; the outer conical surface of distributor, Ra≤1.6μm; the mating surface between pump cover and distributor, Ra≤0.4μm; the outer cylindrical surface of journal or bushing that fits with packing or mechanical seal, Ra≤0.8μm; the mating surfaces with tolerance values ​​of grade 6 and 7, Ra≤1.6jm. 3.15 The machined surface of the pressure-bearing parts
After the water pressure test, it should be dried and coated with anti-rust grease. The inner surface of the oil storage tank of the bearing body should be cleaned and coated with oil-resistant paint. 3.16 Basic requirements for assembly
3.16.1 The parts of the liquid ring pump must be inspected and cleaned before assembly. 3.16.2 The parts and components of the liquid ring pump should be interchangeable, but spare parts can be allowed to leave appropriate repair margins for vulnerable parts according to design requirements. The installation dimensions of the pump should be consistent with the drawings. 3.16.3
After the liquid ring pump is assembled, when the packing (or mechanical seal) is not installed, the rotating rotor should be evenly hooked without friction and blocking.
Anti-rust treatment and painting
3.17.1 Before assembly, the parts 3.17.2 After the performance test is passed, the water in the pump should be removed and the anti-rust treatment should be done again. 3.17.3 The outer surface should be cleaned of rust and oil, and painted with primer and topcoat. 4 Test method
4.1 Mechanical properties test of cast iron materials
4,1.1 Tensile test, according to GB977, 4.1.2 Preparation of test bars and specimens, according to GB5615 and GB977, 4.2 Surface roughness
4.2.1 Casting surface roughness inspection, according to GB6060.1, 4.2.2 Machining surface roughness inspection, according to GB1031, 4.3 Water pressure test
Carry out water pressure strength test at 1.5 times the working pressure. Use clean water at room temperature for the test and maintain the pressure for 5 minutes without leakage. 4.4 Type test and factory test
4.4.1 The liquid ring pump uses air as the medium and clean water at room temperature as the circulating fluid for type test and factory test. 4.4.2 The test methods and performance deviations of the type test and factory test of the liquid ring pump shall comply with the provisions of HG2101. 4.4.3 During the type test and factory test, the bearing temperature and seal leakage should be checked at the same time. And check vibration and noise according to specific circumstances.
5 Acceptance rules
5.1 Provisions for the inspection batch of mechanical properties of cast iron parts. Generally, cast iron casted from the same package of molten iron is considered a batch. S
HG2262-92
5.2 Tensile test
5.2.1 At least one tensile test shall be carried out for each batch of cast iron parts. 5.2.2 Evaluation and re-inspection of tensile test results shall be carried out in accordance with the provisions of GB5675. 5.3 Geometric shape and size
5.3.1 The geometry of parts Any shape and size should be checked piece by piece. 5.3.2 The dimensional deviation and shape position tolerance of parts should comply with the provisions of 3.9, 3.10, 3.15 and drawings. 5.3.3 The surface quality of parts should comply with the provisions of 3.6, 3.16 and drawings. 5.4 Inspection and repair of defects of cast iron parts
5.4.1 The inspection of surface defects of cast iron parts shall be carried out by visual inspection. 5.4.2 The determination and repair of defects of cast iron parts shall be carried out in accordance with the provisions of 3.6.2, 3.6.3, 3.6.4 and 3.6.5. 5.5 Water pressure strength test
According to the provisions of 4.3.
5.6 Impeller balance test
According to the provisions of 3.4.
5.7 Purchased parts
Should have product quality certificates.
5.8 Type test and factory test of liquid ring pump 5.8.1 Liquid ring pump must be subjected to type test in any of the following cases: New product trial production:
Characteristic changes caused by design or process changes b.
5.8.2 Liquid ring pumps produced in batches shall be subjected to factory test according to the proportion specified in Table 5. Table 5
51~100
Number of type tests
10%(>2)
3% >2)
6% >3)
4% (>4)
Number of factory tests
50%（>20)
30%（25)
25%(>30)
5.8.3 If the type test and factory test are unqualified, double sampling or full test shall be carried out. If they are still unqualified, the batch of products shall be unqualified.
6 Marking, packaging, transportation and storage
6.1 Marking
The nameplate shall include the following contents:
Name of manufacturer;
Name and model of liquid ring pump;
Scope of use of liquid ring pump:
Rated gas volume
Maximum exhaust pressure
Ultimate vacuum
Motor power
Pump weight
d. Factory number and date of manufacture of liquid ring pump. 6.1.2 The direction of rotation of the pump should be clearly marked. 6.2 Packaging and transportation
6.2.1 The packaging of the product should comply with the provisions of JB2759 HG2262-92
6.2.2 After the liquid ring pump is treated with anti-rust and surface treatment, the inlet and outlet of the pump should be covered with a cover plate. 6.3 Storage
The liquid ring pump should be prevented from rusting and damage during storage. Complete range
Users can order all or part of the following range according to their needs. 8.
Liquid ring pump:|| tt||Electric motor:
Coupling and guard;
Base;
Consumable parts and accessories (such as impeller, distributor, sleeve and mechanical seal, etc.), factory documents and guarantees
Each liquid ring pump should be accompanied by the following information when leaving the factory:.
Factory certificate;
Packing list;
Liquid ring pump performance curve;
Installation and operation instructions (structural principle, installation and operation instructions, installation dimensions and main consumable parts drawings, etc.); Pump general drawing.
HG2262—92
Appendix A
Allowable eccentricity (reference ISO1940)
(Supplement)
34.5100000
Speed ​​n(r/min)
HG2262—92
Appendix B
Maximum displacement (reference ISO2372)
(supplement)
15001800
60Frequency80
30003600
Note: (1) For various RMS speed values, the maximum displacement (unidirectional amplitude) is a function of the speed. Additional remarks:
This standard is proposed by China National Chemical Equipment Corporation. 100
6 000Speed ​​(r/min)
Maximum displacement
This standard is under the jurisdiction of the Chemical Machinery and Equipment Standardization Technical Unit of the Ministry of Chemical Industry (Chemical Machinery Research Institute of the Ministry of Chemical Industry). This standard was drafted by Jinxi Chemical Machinery Factory and the main drafter of this standard was Pan Jixian
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